+publisher:"Penn State University" +contributor:("Qian Wang, Committee Member")

Penn State University

1. Pradeep Kumar, Arjun. EFFICIENT COMPUTATION OF FREQUENCY RESPONSE OF MULTI-DEGREE OF FREEDOM NON-LINEAR VIBRATIONAL SYSTEM.

Degree: 2017, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/14173amp6495

► Frequency sweep problems occur in several applications of structural dynamics, acoustics and structural acoustics. In general, the evaluation of a frequency response function involves finding… (more)

Subjects/Keywords: frequency sweep; interpolation; Padé’s interpolation technique; nonlinear systems; structural acoustics; structural dynamics; finite element method

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APA (6^th Edition):

Pradeep Kumar, A. (2017). EFFICIENT COMPUTATION OF FREQUENCY RESPONSE OF MULTI-DEGREE OF FREEDOM NON-LINEAR VIBRATIONAL SYSTEM. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/14173amp6495

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pradeep Kumar, Arjun. “EFFICIENT COMPUTATION OF FREQUENCY RESPONSE OF MULTI-DEGREE OF FREEDOM NON-LINEAR VIBRATIONAL SYSTEM.” 2017. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/14173amp6495.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pradeep Kumar, Arjun. “EFFICIENT COMPUTATION OF FREQUENCY RESPONSE OF MULTI-DEGREE OF FREEDOM NON-LINEAR VIBRATIONAL SYSTEM.” 2017. Web. 04 Mar 2021.

Vancouver:

Pradeep Kumar A. EFFICIENT COMPUTATION OF FREQUENCY RESPONSE OF MULTI-DEGREE OF FREEDOM NON-LINEAR VIBRATIONAL SYSTEM. [Internet] [Thesis]. Penn State University; 2017. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/14173amp6495.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pradeep Kumar A. EFFICIENT COMPUTATION OF FREQUENCY RESPONSE OF MULTI-DEGREE OF FREEDOM NON-LINEAR VIBRATIONAL SYSTEM. [Thesis]. Penn State University; 2017. Available from: https://submit-etda.libraries.psu.edu/catalog/14173amp6495

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

2. Feng, Chao. Polynomial Optimization Based Approaches to System Design, Analysis and Identification.

Degree: 2013, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/18792

► In recent developments of system and control theory, a large effort has been devoted to finding equivalent convex formulation of the problems of interest. A… (more)

▼ In recent developments of system and control theory, a large effort has been devoted to finding equivalent convex formulation of the problems of interest. A successful example is the wide application of linear matrix inequalities (LMIs) in formulating system design and analysis problems. From a theoretic point of view, such problems can be considered solved, as convex optimization can be solved reliably and efficient using interior-point methods or other methods available in the literature and/or commercial software. On the other hand, however, many challenging problems in system and control theory have been proven to be NP-Complete or NP-hard. Therefore, unless proven P=NP the best way to tackle these problems is to find approximate solutions using limited computational resources. Recent developments in polynomial optimization, which include moment-based approach and its dual sum-of-square method, sheds some light on solving some of those challenging problems, as it provides systematic approaches to build asymptotically convergent convex relaxations to a general polynomial optimization problem. In this dissertation, we use this as the main optimization tool to address various important yet difficult problems in system and control theory. The problems addressed are categorized into four topics: 1) chance-constraint optimization, 2) distributional robustness, 3) hybrid system identification, and 4) generalized fixed order interpolation. The first two topics is closely related to the probabilistic framework developed in recent years. In the first topic, we design special polynomial functions and use them to develop deterministic approaches to address the probabilistic constraints. Comparing the scenario approach in the literature of probabilistic control, which give soft bounds on probability, our approaches provide hard bounds. The second topic is connected to system analysis with uncertainty under probabilistic framework, in a distributional-free manner. Instead of assuming some fixed distribution on the uncertainty, it aims at finding the worst-case expected performance of the system, assuming the distribution of uncertainty is unknown but obey some loose conditions. The last two topics addressed concern hybrid system identification and generalized interpolation. We first show that these problems can be equivalently reformulated as polynomial optimization problems. While the recent developed polynomial optimization tools can construct convex relaxations to these problems, the required computational cost is prohibitively large. It is not surprising as a polynomial problem is NP-hard in general. In this dissertation, we exploit the very specific structure of these problems and provide numerically efficient algorithms to solve these problems. Advisors/Committee Members: Constantino Manuel Lagoa, Dissertation Advisor/Co-Advisor, David Jonathan Miller, Committee Member, Ji Woong Lee, Committee Member, Qian Wang, Committee Member.

Subjects/Keywords: Robust Control; Probabilistic Control; Distributional Robustness; Switched System; Identification; Interpolation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Feng, C. (2013). Polynomial Optimization Based Approaches to System Design, Analysis and Identification. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/18792

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Feng, Chao. “Polynomial Optimization Based Approaches to System Design, Analysis and Identification.” 2013. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/18792.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Feng, Chao. “Polynomial Optimization Based Approaches to System Design, Analysis and Identification.” 2013. Web. 04 Mar 2021.

Vancouver:

Feng C. Polynomial Optimization Based Approaches to System Design, Analysis and Identification. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/18792.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Feng C. Polynomial Optimization Based Approaches to System Design, Analysis and Identification. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/18792

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

3. Liu, Jun. Compiler Optimizations for SIMD/GPU/Multicore Architectures.

Degree: 2013, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/18798

► In modern computer architectures, both SIMD (single-instruction multiple-data) instruction set extensions and GPUs can be used to accelerate the general purpose applications. In addition, the… (more)

▼ In modern computer architectures, both SIMD (single-instruction multiple-data) instruction set extensions and GPUs can be used to accelerate the general purpose applications. In addition, the multicore machines can potentially provide more computation power for high performance computing with increasing number of cores and deeper cache hierarchies. However, writing high-performance codes manually for these architectures is still tedious and difficult. In particular, the unique characteristics of these architectures may not be fully exploited. Specifically, SIMD instruction set extensions enable the exploitation of a specific type of data parallelism called SLP (Superword Level Parallelism). While prior research shows that significant performance savings are possible when SLP is exploited, placing SIMD instructions in an application code manually can be very difficult and error prone. We propose a novel automated compiler framework for improving superword level parallelism exploitation. The key part of our framework consists of two stages: superword statement generation and data layout optimization. The first stage is our main contribution and has two phases, statement grouping and statement scheduling. of which the primary goals are to increase SIMD parallelism and, more importantly, capture more superword reuses among the superword statements through global data access and reuse pattern analysis. Further, as a complementary optimization, our data layout optimization organizes data in memory space such that the price of memory operations for SLP is minimized. The results from our compiler implementation and tests on two systems indicate performance improvements as high as 15.2% over a state-of-the-art SLP optimization algorithm. On the other hand, GPUs are also being increasingly used in accelerating general-purpose applications, leading to the emergence of GPGPU architectures. New programming models, e.g., Compute Unified Device Architecture (CUDA), have been proposed to facilitate programming general-purpose computations in GPGPUs. However, writing high-performance CUDA codes manually is still tedious and difficult. In particular, the organization of the data in the memory space can greatly affect the performance due to the unique features of a custom GPGPU memory hierarchy. In this work, we propose an automatic data layout transformation framework to solve the key issues associated with a GPGPU memory hierarchy (i.e., channel skewing, data coalescing, and bank conflicts). Our approach employs a widely applicable strategy based on a novel concept called data localization. Specifically, we try to optimize the layout of the arrays accessed in kernels mapped to GPGPUs, for both the device memory and shared memory, at both coarse grain and fine grain parallelization levels. In addition, iteration space tiling is an important technique for optimizing loops that constitute a large fraction of execution times in computation kernels of both scientific codes and embedded applications. While tiling has been studied… Advisors/Committee Members: Mahmut Taylan Kandemir, Dissertation Advisor/Co-Advisor, Mary Jane Irwin, Committee Member, Padma Raghavan, Committee Member, Qian Wang, Committee Member.

Subjects/Keywords: Compiler Optimization; SIMD; GPGPU; Multicore; Scheduling; Data Layout Transformation; Tiling

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Liu, J. (2013). Compiler Optimizations for SIMD/GPU/Multicore Architectures. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/18798

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Liu, Jun. “Compiler Optimizations for SIMD/GPU/Multicore Architectures.” 2013. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/18798.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Liu, Jun. “Compiler Optimizations for SIMD/GPU/Multicore Architectures.” 2013. Web. 04 Mar 2021.

Vancouver:

Liu J. Compiler Optimizations for SIMD/GPU/Multicore Architectures. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/18798.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Liu J. Compiler Optimizations for SIMD/GPU/Multicore Architectures. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/18798

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

4. Dunbar, Alexander Jay. Analysis of the Laser Powder Bed Fusion Additive Manufacturing Process Through Experimental Measurement and Finite Element Modeling.

Degree: 2016, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/28714

► The objective in this work is to provide rigourous experimental measurements to aid in the development of laser powder bed fusion (LPBF) additive manufacturing (AM).… (more)

▼ The objective in this work is to provide rigourous experimental measurements to aid in the development of laser powder bed fusion (LPBF) additive manufacturing (AM). A specialized enclosed instrumented measurement system is designed to provide in situ experimental measurements of temperature and distortion. Experiments include comparisons of process parameters, materials and LPBF machines. In situ measurements of distortion and temperature made throughout the build process highlight inter-layer distortion effects previously undocumented for laser powder bed fusion. Results from these experiments are also be implemented in the development and validation of finite element models of the powder bed build process. Experimental analysis is extended from small-scale to larger part-scale builds where experimental post-build measurements are used in analysis of distortion profiles. Experimental results provided from this study are utilized in the validation of a finite element model capable of simulating production scale parts. The validated finite element model is then implemented in the analysis of the part to provide information regarding the distortion evolution process. A combination of experimental measurements and simulation results are used to identify the mechanism that results in the measured distortion profile for this geometry. Optimization of support structure primarily focuses on the minimization of material use and scan time, but no information regarding failure criteria for support structure is available. Tensile test samples of LPBF built support structure are designed, built, and tested to provide measurements of mechanical properties of the support structure. Experimental tests show that LPBF built support structure has only 30-40% of the ultimate tensile strength of solid material built in the same machine. Experimental measurement of LPBF built support structure provides clear failure criteria to be utilized in the future design and implementation of support structure. Advisors/Committee Members: Panagiotis Michaleris, Dissertation Advisor/Co-Advisor, Timothy William Simpson, Committee Member, Qian Wang, Committee Member, Allison Michelle Beese, Committee Member.

Subjects/Keywords: Experimental design; powder bed; additive manufacturing; Ti-6Al-4V; Inconel

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APA (6^th Edition):

Dunbar, A. J. (2016). Analysis of the Laser Powder Bed Fusion Additive Manufacturing Process Through Experimental Measurement and Finite Element Modeling. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/28714

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dunbar, Alexander Jay. “Analysis of the Laser Powder Bed Fusion Additive Manufacturing Process Through Experimental Measurement and Finite Element Modeling.” 2016. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/28714.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dunbar, Alexander Jay. “Analysis of the Laser Powder Bed Fusion Additive Manufacturing Process Through Experimental Measurement and Finite Element Modeling.” 2016. Web. 04 Mar 2021.

Vancouver:

Dunbar AJ. Analysis of the Laser Powder Bed Fusion Additive Manufacturing Process Through Experimental Measurement and Finite Element Modeling. [Internet] [Thesis]. Penn State University; 2016. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/28714.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dunbar AJ. Analysis of the Laser Powder Bed Fusion Additive Manufacturing Process Through Experimental Measurement and Finite Element Modeling. [Thesis]. Penn State University; 2016. Available from: https://submit-etda.libraries.psu.edu/catalog/28714

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

5. Wang, Cheng. IMPROVING COST-EFFICACY IN PUBLIC CLOUDS: OPTIMAL CONTROL SUBJECT TO CLOUD-TENANT INTERACTIONS.

Degree: 2016, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/13367cxw967

► In recent years there has been a growing trend of tenant workload needs in public cloud platforms, which may lead to an increasingly competitive cloud… (more)

▼ In recent years there has been a growing trend of tenant workload needs in public cloud platforms, which may lead to an increasingly competitive cloud market wherein the cloud providers will be forced to operate their data centers at significantly higher utilization levels than seen today. As a negative outcome, public cloud providers may find increased occurrence of periods when tenant needs exceed available resources, which may hurt both the cloud's and the tenants' profitability. In the traditional cluster computing and private cloud setting, since the tenants have full control over the computing resources provisioned by the cloud, the cloud and the tenants could collaborate to optimize the cost-efficacy of the overall eco-system. However, when moving to public clouds, the cloud provider and its tenants become selfish entities that interact with each other but only focus on their own profitability; the existence of multi-tenancy further complicates the situation. It is thus essential to revisit the prior work of both private and public cloud settings and the emerging technologies in public clouds, and explore effective ways of improving both entities' cost-efficacy. On the cloud side, on the one hand, there have been proposals to minimize the cloud's operational costs via various control knobs. However, despite these efforts, it remains a challenging problem due to (i) the complexity of different control knobs and (ii) the complexity of utility pricing, which could combine to result in optimal control problem formulations that are computationally intractable and difficult to cast and update upon changes. On the other hand, utility providers usually take two canonical approaches for incentivizing appropriate customer behaviors as well as maximizing their profitability: (i) dynamic pricing and (ii) dynamic capacity modulation. When adapting to public clouds, new challenges arise due to the cloud's lack of knowledge of the tenants' demands and responses, and the idiosyncrasies of tenants' computing resource needs, which are entirely different from that of the traditional utility providers. On the tenant side, public clouds already offer a variety of procurement options, catering to the needs of a growing and diverse body of tenant workloads. The tenant is now confronted with a dizzying array of resource procurement options with tradeoffs of price dynamism vs. capacity dynamism vs. scaling granularity, which implies great cost-saving potential but may also result in tenant procurement problems that grow exponentially in size. In particular, Amazon EC2 spot instance is a representative virtual machine (VM) offering that is provisioned with such a price dynamism vs. capacity dynamism tradeoff. Prior works have usually employed simple statistical models for price dynamism prediction of spot instances for tractability concerns. However they neglect the key features of spot instance prices that could be leveraged to further improve the tenant's service contiguity and application performance. Therefore, constructing a… Advisors/Committee Members: Bhuvan Urgaonkar, Dissertation Advisor/Co-Advisor, Bhuvan Urgaonkar, Committee Chair/Co-Chair, Qian Wang, Committee Member, Anand Sivasubramaniam, Committee Member, Vinayak V Shanbhag, Outside Member, George Kesidis, Committee Member, Qian Wang, Dissertation Advisor/Co-Advisor.

Subjects/Keywords: Public cloud; Tenant; Cost-efficacy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wang, C. (2016). IMPROVING COST-EFFICACY IN PUBLIC CLOUDS: OPTIMAL CONTROL SUBJECT TO CLOUD-TENANT INTERACTIONS. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/13367cxw967

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Cheng. “IMPROVING COST-EFFICACY IN PUBLIC CLOUDS: OPTIMAL CONTROL SUBJECT TO CLOUD-TENANT INTERACTIONS.” 2016. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/13367cxw967.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Cheng. “IMPROVING COST-EFFICACY IN PUBLIC CLOUDS: OPTIMAL CONTROL SUBJECT TO CLOUD-TENANT INTERACTIONS.” 2016. Web. 04 Mar 2021.

Vancouver:

Wang C. IMPROVING COST-EFFICACY IN PUBLIC CLOUDS: OPTIMAL CONTROL SUBJECT TO CLOUD-TENANT INTERACTIONS. [Internet] [Thesis]. Penn State University; 2016. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/13367cxw967.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang C. IMPROVING COST-EFFICACY IN PUBLIC CLOUDS: OPTIMAL CONTROL SUBJECT TO CLOUD-TENANT INTERACTIONS. [Thesis]. Penn State University; 2016. Available from: https://submit-etda.libraries.psu.edu/catalog/13367cxw967

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

6. Sharma, Bikash. Towards Improving Performance and Reliability of Cloud Platforms.

Degree: 2013, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/17574

► Cloud computing refers to both applications delivered as services over the Internet, as well as the hardware and system software in the data centers, that… (more)

▼ Cloud computing refers to both applications delivered as services over the Internet, as well as the hardware and system software in the data centers, that provides these services. It has emerged as one of the most versatile forms of utility computing, where both applications and infrastructure facilities can be leased from an infinite pool of computing resources in the form of fine-grained pay-as-you-go mode of billing. Over recent years, there has been an unprecedented growth of cloud services from various key cloud providers like Amazon, Google, IBM and Microsoft. Some of the unique characteristics that make cloud computing so attractive and different from traditional distributed systems like data centers and grids include self-organization, elasticity, multi-tenancy, infinite resource pool availability and flexible economy of scale. With all the promises and benefits offered by cloud computing, also comes the associated challenges. Amidst various challenges, performance and reliability related issues in clouds are very critical and form the main focus of this dissertation. Specifically, the focus of this dissertation is to address the following four specific performance and reliability concerns in clouds: (i) lack of representative cloud workloads and performance benchmarking that are essential to evaluate and assess the various characteristics of cloud systems; (ii) poor management of resources in big data cloud clusters running representative large scale data processing applications like Hadoop MapReduce. Specifically, this is due to the problems associated with the static, fixed-size, coarse-grained, and uncoordinated resource allocation in Hadoop framework; (iii) inefficient scheduling and resource management of representative workload mix of interactive and batch applications, running on hybrid data centers which consist of both native and virtual machines; and (iv) lack of end-to-end effective problem determination and diagnosis framework for virtualized cloud platforms that is quintessential to enhance the reliability of the cloud infrastructure and hosted services. Towards this pursuit, this dissertation addresses the above mentioned performance and reliability specific problems in clouds, explores the underlying motivations, proposes effective methodologies and solutions, conducts exhaustive evaluations through comprehensive experimental and empirical analyses, and lays foundations for future research directions. The first chapter of the dissertation focuses on the characterization and modeling of cloud workloads. In particular, the thrust is on the modeling and synthesis of an important workload property called task placement constraints, and demonstrates their significant performance impact on scheduling in terms of the incurred task pending delays. The second chapter describes an efficient dynamic resource management framework, called MROrchestrator, which alleviates the downsides of slot-based resource allocation in Hadoop MapReduce clusters. MROrchestrator monitors and analyzes the execution-time… Advisors/Committee Members: Chitaranjan Das, Dissertation Advisor/Co-Advisor, Chitaranjan Das, Committee Chair/Co-Chair, Mahmut Taylan Kandemir, Committee Member, Bhuvan Urgaonkar, Committee Member, Qian Wang, Committee Member, Joseph Hellerstein, Special Member, Raj Acharya, Special Member.

Subjects/Keywords: cloud computing; workload characterization; scheduling; resource management; fault diagnosis; virtualization; mapreduce

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sharma, B. (2013). Towards Improving Performance and Reliability of Cloud Platforms. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/17574

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sharma, Bikash. “Towards Improving Performance and Reliability of Cloud Platforms.” 2013. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/17574.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sharma, Bikash. “Towards Improving Performance and Reliability of Cloud Platforms.” 2013. Web. 04 Mar 2021.

Vancouver:

Sharma B. Towards Improving Performance and Reliability of Cloud Platforms. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/17574.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sharma B. Towards Improving Performance and Reliability of Cloud Platforms. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/17574

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

7. Mirzazad-barijough, Sanam. On Analysis of Discrete-time Piecewise Affine Systems.

Degree: 2013, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/18934

► Piecewise affine systems play an important role in tractable modeling of general nonlinear systems. A piecewise affine system models a nonlinear system as a finite… (more)

▼ Piecewise affine systems play an important role in tractable modeling of general nonlinear systems. A piecewise affine system models a nonlinear system as a finite number of affine subsystems that describe possible continuous dynamics, and of a discrete logic that determines which subsystem is active at each instant of time. These subsystems are linearizations of the nonlinear system about different operating points. This dissertation is concerned with stability and relative stability analysis of discrete-time piecewise affine systems. Common and multiple Lyapunov functions approaches are the usual approaches for the analysis of piecewise affine systems. However, these approaches only provide sufficient conditions for the analysis and they are inherently conservative, in the sense that if they fail, they do not provide alternative options to solve the analysis problem for piecewise affine systems. To tackle the stability and performance analysis problem for piecewise affine systems in the presence of bounded additive disturbances we present a novel method by bridging two approaches: the symbolic model–based and the Lyapunov function–based approaches. By the former approach, we construct a nested se- quence of finite-state symbolic models, each of which abstracts the original piece- wise affine system. By the latter approach, we provide stability and relative stabil- ity analysis conditions for the obtained symbolic models. The presented approach addresses the limitations of existing results and provides a scalable solution; one can obtain a larger stability region or smaller performance bound by analyzing the stability and performance using a tighter abstraction of the piecewise affine system. More precisely, we show that if a symbolic model turns out to be equivalent to the piecewise affine system, then solving an increasing but yet finite number of linear matrix inequalities yields exact analysis. In addition, we characterize a class of piecewise affine systems for which a finite-state symbolic model within the sequence of symbolic models is guaranteed to be equivalent to the piecewise affine system. Advisors/Committee Members: Constantino Manuel Lagoa, Dissertation Advisor/Co-Advisor, Constantino Manuel Lagoa, Committee Chair/Co-Chair, Jeffrey Scott Mayer, Committee Member, Jeffrey Louis Schiano, Committee Member, Qian Wang, Committee Member.

Subjects/Keywords: Hybrid systems; linear matrix inequalities; Lyapunov functions; semidefinite programs; simulation; bisimulation; invariant sets

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APA (6^th Edition):

Mirzazad-barijough, S. (2013). On Analysis of Discrete-time Piecewise Affine Systems. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/18934

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mirzazad-barijough, Sanam. “On Analysis of Discrete-time Piecewise Affine Systems.” 2013. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/18934.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mirzazad-barijough, Sanam. “On Analysis of Discrete-time Piecewise Affine Systems.” 2013. Web. 04 Mar 2021.

Vancouver:

Mirzazad-barijough S. On Analysis of Discrete-time Piecewise Affine Systems. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/18934.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mirzazad-barijough S. On Analysis of Discrete-time Piecewise Affine Systems. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/18934

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

8. Sharifi, Akbar. Addressing Power, Performance and End-to-end Qos in Emerging Multicores through system-wide Resource Management.

Degree: 2013, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/18387

► Multicores are now ubiquitous, owing to the benefits they bring over single core architectures including improved performance, lower power consumption and reduced design complexity. Several… (more)

▼ Multicores are now ubiquitous, owing to the benefits they bring over single core architectures including improved performance, lower power consumption and reduced design complexity. Several resources ranging from the cores themselves to multiple levels of on-chip caches and off-chip memory bandwidth are typically shared in a multicore processor. Prudent management of these shared resources for achieving predictable performance and optimizing energy efficiency is critical and thus, has received considerable attention in recent times. In my research study, I have been focusing on proposing novel schemes to dynamically manage various available shared resources in emerging multiocres, while targeting three main goals: (1) Maximizing the overall system performance and (2) Meeting end-to-end QoS targets defined by the system administrator (3) Optimizing power and energy consumption. We consider a wide range of available resources including cors, shared caches, off-chip memory bandwidth, on-chip communication resources and power budgets. Further, towards achieving our goals, we employ {\em formal control theory} as a powerful tool to provide the high-level performance targets through dynamically managing and partitioning the shared resources. Providing end-to-end QoS in future multicores is essential for supporting wide-spread adoption of multicore architectures in virtualized servers and cloud computing systems. An initial step towards such an end-to-end QoS support in multicores is to ensure that at least the major computational and memory resources on-chip are managed efficiently in a coordinated fashion. In this dissertation we propose a platform for end-to-end on-chip resource management in multicore processors. Assuming that each application specifies a performance target/SLA, the main objective is to dynamically provision sufficient on-chip resources to applications for achieving the specified targets. We employ a feedback based system, designed as a Single-Input, Multiple-Output (SIMO) controller with an Auto-Regressive-Moving-Average (ARMA) model, to capture the behaviors of different applications. Dynamic management of the shared resources in multicore systems with the goal of maximizing the overall system performance is another main part of this dissertation. As we move towards many-core systems, interference in shared cache continues to increase, making shared cache management an important issue in increasing overall system performance. As a part of my research, we propose a dynamic cache management scheme for multiprogrammed, multithreaded applications, with the objective of obtaining maximum performance for both individual applications and the multithreaded workload mix. From an architectural side, in parallel to increasing core counts, network-on-chip (NoC) is becoming one of the critical shared components which determine the overall performance, energy consumption and reliability of emerging multicore systems. In my research, targeting Network-on-Chip (NoC) based multicores, we propose two network… Advisors/Committee Members: Mahmut Taylan Kandemir, Dissertation Advisor/Co-Advisor, Mahmut Taylan Kandemir, Committee Chair/Co-Chair, Chitaranjan Das, Committee Member, Padma Raghavan, Committee Member, Qian Wang, Committee Member.

Subjects/Keywords: Multicore Systems; Resource Management; Power; Performance; End-to-End QoS

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sharifi, A. (2013). Addressing Power, Performance and End-to-end Qos in Emerging Multicores through system-wide Resource Management. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/18387

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sharifi, Akbar. “Addressing Power, Performance and End-to-end Qos in Emerging Multicores through system-wide Resource Management.” 2013. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/18387.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sharifi, Akbar. “Addressing Power, Performance and End-to-end Qos in Emerging Multicores through system-wide Resource Management.” 2013. Web. 04 Mar 2021.

Vancouver:

Sharifi A. Addressing Power, Performance and End-to-end Qos in Emerging Multicores through system-wide Resource Management. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/18387.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sharifi A. Addressing Power, Performance and End-to-end Qos in Emerging Multicores through system-wide Resource Management. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/18387

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

9. Kultursay, Emre. Compiler-based Memory Optimizations for High Performance Computing Systems.

Degree: 2013, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/18832

► Parallelism has always been the primary method to achieve higher performance. To advance the computational capabilities of state-of-the-art high performance computing systems, we continue to… (more)

▼ Parallelism has always been the primary method to achieve higher performance. To advance the computational capabilities of state-of-the-art high performance computing systems, we continue to rely on increasing parallelism by putting more processors into systems and integrating more cores and more logic into the processors. However, the returns from increasing parallelism are diminishing. Putting more chips, more cores, more logic already started to bring less and less improvements in performance. The primary cause of this behavior is memory. The scalability problem of memory systems translates into a discrepancy between the increase in processor performance and the improvements in memory bandwidth, latency, and energy efficiency. The memory systems in high performance computers are no longer able to provide data to the parallel computational units at a fast enough rate, with a low enough latency and energy. This memory problem plagues the design of high performance systems, and scaling trends show that managing and accessing memory efficiently is one of the most crucial challenges for realizing exascale systems. This dissertation focuses on compiler-based methods to address these memory issues. Specifically, various compiler-based memory optimizations to improve the memory behavior of application-specific and general purpose high performance computing systems are proposed and evaluated. The first part of this dissertation identifies the memory scalability problem in the design of application-specific hardware accelerators and proposes a compiler-based automatic memory partitioning method to address this issue. This method generates energy efficient, high bandwidth, low latency memory systems and enables the generation high performance accelerators that can scale up to a huge number of custom-designed chips. The second part of this dissertation targets general purpose systems and attacks the memory latency and bandwidth problem in many-core processors that are used as building blocks for general purpose high performance computing systems. It presents compiler generation of software prefetching and streaming store instructions and shows their effectiveness in hiding long memory latencies and saving precious memory bandwidth on a cutting edge many-core processor. Advisors/Committee Members: Mahmut Taylan Kandemir, Dissertation Advisor/Co-Advisor, Mahmut Taylan Kandemir, Committee Chair/Co-Chair, Padma Raghavan, Committee Member, Mary Jane Irwin, Committee Member, Qian Wang, Committee Member, Kemal Ebcioglu, Special Member.

Subjects/Keywords: Compilers; memory optimizations; high performance computing; application-specific hardware accelerators; many-core processors

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kultursay, E. (2013). Compiler-based Memory Optimizations for High Performance Computing Systems. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/18832

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kultursay, Emre. “Compiler-based Memory Optimizations for High Performance Computing Systems.” 2013. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/18832.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kultursay, Emre. “Compiler-based Memory Optimizations for High Performance Computing Systems.” 2013. Web. 04 Mar 2021.

Vancouver:

Kultursay E. Compiler-based Memory Optimizations for High Performance Computing Systems. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/18832.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kultursay E. Compiler-based Memory Optimizations for High Performance Computing Systems. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/18832

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

10. Tak, Byung Chul. Systems Infrastructure for Supporting Utility Computing in Clouds.

Degree: 2012, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/13963

► Recent emergence of cloud computing is being considered an important enabler of the long-cherished paradigm of utility computing. Utility computing represents the desire to have… (more)

▼ Recent emergence of cloud computing is being considered an important enabler of the long-cherished paradigm of utility computing. Utility computing represents the desire to have computing resources delivered, used, paid for and managed with assured quality similar to other commoditized utilities such as electricity. The principal appeal of utility computing lies in the systemized framework it creates for the interaction between providers and consumers of computing resources. While current clouds are undoubtedly succeeding towards this goal, they lack some of the crucial features necessary to realize a mature utility. First, one foundational feature of a utility is the ability to accurately measure and manage the usage of the resources by its various consumers. Modern VM-based cloud platform, providers of the cloud services face significant difficulties in obtaining the accurate picture of resource consumption by their consumers. Second, consumers of a utility expect to have systematic ways to infer their resource needs so that they can make cost-effective resource procurement decisions. However, current consumers of the clouds are ill-equipped in making their resource procurement decisions because of lack of information regarding resource quantity and their implication on application performance. In the first part of the dissertation, we consider provider-side issues of resource accounting. It is nontrivial to correctly apportion the usage of a shared resource in the cloud to its various users. Towards achieving accurate understanding of the overall resource usage within the cloud, we develop a technique for dynamically discovering the various resources that are directly or indirectly being used by a consumer’s application. This, in turn, enables us to build techniques for accurately accounting the resource usage. The benefits of our approach are explained by comparing with and illustrating the problems of using state-of-the-art methods in resource accounting. In the next part of the dissertation, we focus on the problem of understating the cost of application deployments to the cloud from the consumers perspective. Employing empirical approaches to estimate the resource requirements of the target application, we present how to systematically incorporate important systems characteristics such as workload intensity, growth, and variances as well as comprehensive set of hosting options into determining the economic feasibility of application deployment in the cloud. Advisors/Committee Members: Bhuvan Urgaonkar, Committee Chair/Co-Chair, Anand Sivasubramaniam, Committee Member, Trent Ray Jaeger, Committee Member, Qian Wang, Committee Member, Rong N Chang, Special Member.

Subjects/Keywords: Utility Computing; Cloud Computing; Virtualization; Operating System; Distributed System; Resource Accounting

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tak, B. C. (2012). Systems Infrastructure for Supporting Utility Computing in Clouds. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/13963

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tak, Byung Chul. “Systems Infrastructure for Supporting Utility Computing in Clouds.” 2012. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/13963.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tak, Byung Chul. “Systems Infrastructure for Supporting Utility Computing in Clouds.” 2012. Web. 04 Mar 2021.

Vancouver:

Tak BC. Systems Infrastructure for Supporting Utility Computing in Clouds. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/13963.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tak BC. Systems Infrastructure for Supporting Utility Computing in Clouds. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/13963

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

11. Srikantaiah, Shekhar Shashi. Dynamic Shared Resource Management for Providing Predictable Performance in Multicore Processors .

Degree: 2011, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/12062

► Chip multiprocessors (CMPs) are being accepted as the microprocessor architecture of choice and have received strong impetus from almost all leading chip manufactures. The dream… (more)

▼ Chip multiprocessors (CMPs) are being accepted as the microprocessor architecture of choice and have received strong impetus from almost all leading chip manufactures. The dream run for computer architects of cruising on the performance benefits of Moore’s law by increasing a single processor's clock rate and pipeline depth to exploit instruction level parallelism is nearing its end. With memory latency starting to dominate the application execution time as opposed to instruction execution time, scaling the "memory wall" attains prominence. The leverage obtained by exploiting thread level parallelism and the resultant improvement in processor utilization is diminished by low utilization of several on-chip resources. To alleviate these problems, computer architects and designers alike, have suggested to share several resources on-chip. Shared resources in a CMP environment are like "double edged swords". They pose unique challenges to the seamless adoption of CMPs in both virtualization based environments and high performance computing systems. On the one hand, sharing resources (like cores, on-chip last level cache, off-chip memory bandwidth etc) is beneficial due to increased resource utilization. On the other hand, lack of control over management of these shared resources leads to destructive interference among different threads/applications. Consequently, there is a general loss of determinism, faded performance isolation, and an overall lack of the notion of performance quality of service (QoS) provided to applications. This has direct ramifications on adhering to service level agreements in environments involving consolidation of multiple heterogeneous applications/workloads. The advent of the CMP era has resulted in a sustained emphasis on the need for development of techniques to extract thread-level parallelism. Given the limited ability of current compilers to extract a large fraction of the available parallelism, it is evident that a typical workload in future multicore processors would consist of a dynamic and diverse range of applications that exhibit varying degrees of thread level parallelism. This has resulted in changes in the application space besides the changes in the resource landscape due to shared resources. To address the aforementioned problems in CMPs, in my thesis work, I have focussed on developing an integrated framework for managing the different shared resources in CMPs. Scenarios like management of shared resources among multiple threads of a single application are simpler to handle than scenarios where multiple applications (possibly multi-threaded) are executing concurrently. For the former case, we can adopt some hardware efficient, yet effective solutions. However, such solutions may not suffice to address the latter case. Dynamically partitioning shared resources in CMPs among multiple concurrently executing applications in a controlled manner may be a more effective solution to guarantee QoS as both heuristic and formal methods can be adopted in such solutions. This… Advisors/Committee Members: Dr Mahmut Kandemir, Dissertation Advisor/Co-Advisor, Mary Jane Irwin, Committee Member, Chitaranjan Das, Committee Member, Dr Mahmut Kandemir, Committee Chair/Co-Chair, Dr Qian Wang, Committee Member.

Subjects/Keywords: Multicore; Shared cache; predictable performance

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Srikantaiah, S. S. (2011). Dynamic Shared Resource Management for Providing Predictable Performance in Multicore Processors . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/12062

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Srikantaiah, Shekhar Shashi. “Dynamic Shared Resource Management for Providing Predictable Performance in Multicore Processors .” 2011. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/12062.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Srikantaiah, Shekhar Shashi. “Dynamic Shared Resource Management for Providing Predictable Performance in Multicore Processors .” 2011. Web. 04 Mar 2021.

Vancouver:

Srikantaiah SS. Dynamic Shared Resource Management for Providing Predictable Performance in Multicore Processors . [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/12062.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Srikantaiah SS. Dynamic Shared Resource Management for Providing Predictable Performance in Multicore Processors . [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/12062

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

12. Chaitanya, Shiva. ADDRESSING PERFORMANCE CHALLENGES IN SECURE STORAGE SYSTEMS .

Degree: 2011, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/9939

► Storage security has emerged as a significant area of research in the last decade. Given the rise of sensitive digital data such as online medical… (more)

Subjects/Keywords: Storage Security; Performance

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chaitanya, S. (2011). ADDRESSING PERFORMANCE CHALLENGES IN SECURE STORAGE SYSTEMS . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/9939

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chaitanya, Shiva. “ADDRESSING PERFORMANCE CHALLENGES IN SECURE STORAGE SYSTEMS .” 2011. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/9939.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chaitanya, Shiva. “ADDRESSING PERFORMANCE CHALLENGES IN SECURE STORAGE SYSTEMS .” 2011. Web. 04 Mar 2021.

Vancouver:

Chaitanya S. ADDRESSING PERFORMANCE CHALLENGES IN SECURE STORAGE SYSTEMS . [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/9939.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chaitanya S. ADDRESSING PERFORMANCE CHALLENGES IN SECURE STORAGE SYSTEMS . [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/9939

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

13. Govindan, Sriram. Optimizing Power Delivery Cost In Datacenters.

Degree: 2011, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/12108

► Our increasing reliance on Internet-centric services and information technology has led to the proliferation of datacenters. The peak power consumption of these datacenters significantly impact… (more)

▼ Our increasing reliance on Internet-centric services and information technology has led to the proliferation of datacenters. The peak power consumption of these datacenters significantly impact their sustainability: both their recurring electricity bill (Op-ex) and one-time construction costs (Cap-ex). Existing pieces of work optimizing these cost are largely inadequate due to two main reasons, (i) they rely on overly conservative face-plate rating based estimates of datacenter peak needs, rendering them ineffective, and (ii) they employ demand throttling (DVFS) and/or demand shaping (load spreading/migration) techniques, both with heavy performance degrading implications. We address the first issue by developing fine- grained characterization of workload power/performance needs based on empirical power and resource-usage measurements. We further exploit the temporal/spatial variance in workload power requirements to develop statistical multiplexing based representation of aggregate datacenter power demand. Together, these measurement and statistical characterization allow us to make more informed power management decisions. Towards addressing the second issue, we propose an entirely novel knob for reducing the peak power consumption which does not have any performance degrading consequences, by exploiting the already existing energy buffer (eBuff) available in the form of UPS batteries in datacenters. Intuitively, eBuff stores energy in UPS batteries during valleys - periods of lower demand, which can be drained during peaks - periods of higher demand. UPS batteries are normally used as a fail-over mechanism to transition to captive power sources upon utility failure. Furthermore, frequent discharges can cause UPS batteries to fail prematurely. We conduct detailed analysis of battery operation to figure out feasible operating regions given such battery lifetime and datacenter availability concerns. Using insights learned from this analysis, we develop peak reduction techniques that combine the UPS battery knob with existing techniques for reducing datacenter power costs at minimal performance impact. Using an experimental platform, we find that eBuff can be used to realize up to 30% peak power reduction across a wide range of workload peaks/valleys, UPS provisioning, and application Service Level Agreement (SLA) constraints. Our cost-benefit analysis of investments in battery capacity and the resulting savings in Cap-ex and Op-ex suggests that datacenters are likely to gain substantially from additional procurement of battery capacity. Advisors/Committee Members: Anand Sivasubramaniam, Dissertation Advisor/Co-Advisor, Anand Sivasubramaniam, Committee Chair/Co-Chair, Bhuvan Urgaonkar, Committee Chair/Co-Chair, Trent Ray Jaeger, Committee Member, Qian Wang, Committee Member, Ratnesh K Sharma, Committee Member.

Subjects/Keywords: datacenter; peak power; battery; stored energy; statistical multiplexing; Cap-ex; Op-ex

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Govindan, S. (2011). Optimizing Power Delivery Cost In Datacenters. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/12108

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Govindan, Sriram. “Optimizing Power Delivery Cost In Datacenters.” 2011. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/12108.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Govindan, Sriram. “Optimizing Power Delivery Cost In Datacenters.” 2011. Web. 04 Mar 2021.

Vancouver:

Govindan S. Optimizing Power Delivery Cost In Datacenters. [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/12108.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Govindan S. Optimizing Power Delivery Cost In Datacenters. [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/12108

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

14. Muralidhara, Sai Prashanth. Reducing Interference in Memory Hierarchy Resources Using Application Aware Management.

Degree: 2011, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/12150

► Aggressive technology scaling has resulted in an increase in number of cores being integrated on-chip. While on-chip cores are increasing at a fast rate, the… (more)

▼ Aggressive technology scaling has resulted in an increase in number of cores being integrated on-chip. While on-chip cores are increasing at a fast rate, the memory hierarchy resources are scaling at a much slower pace. The memory resources, such as different levels of on-chip cache and the off-chip memory bandwidth, are costly and are often shared across multiple on-chip cores. This leads to multiple applications contending for access to these common resources. In the process, these applications can harmfully interfere with one another, and, this interference can result in significant degradation of both system throughput and individual application performance. Therefore, intelligently managing the shared memory resources by mitigating inter-application interference is vitally important in emerging multicore systems. This dissertation makes three key contributions towards addressing the above problem of interference in shared memory resources. First, this dissertation considers the last-level shared cache and the off-chip memory as instances of shared memory resources, and, studies the causes and different ways in which applications interfere with one another while contending for a resource. Second, this dissertation studies the negative impact of resource contention on application and system performances. Third, this dissertation proposes novel schemes to mitigate inter-application interference and thereby improve system and application performance. These schemes aim to efficiently manage the resources in an application aware manner with the goal of mitigating the overall inter-application interference. An application aware resource management scheme considers the memory access characteristics of all the contending applications and uses this information to manage the shared resource. The resource management decisions are based on two key principles: 1) isolating applications/threads that harmfully interfere from each other by partitioning the resources between the interfering applications, and, 2) deciding the size of the resource partition that an application gets based on its memory access characteristics and requirements. The trend of integrating increasing number of cores on a single chip is projected to continue into the future. This continued scaling is propelling the parallel computation capability of emerging multicore systems. Efficient management of shared memory hierarchy resources will become ever more important in the future if we are to ensure that applications extract the maximum possible parallelism from these multicore systems. This dissertation takes an important step towards addressing this problem by proposing novel schemes to efficiently manage multiple memory hierarchy resources. These schemes are very effective in practice, improving both system performance and individual application performance. Advisors/Committee Members: Mahmut Taylan Kandemir, Dissertation Advisor/Co-Advisor, Mahmut Taylan Kandemir, Committee Chair/Co-Chair, Padma Raghavan, Committee Member, Mary Jane Irwin, Committee Member, Qian Wang, Committee Member.

Subjects/Keywords: Multicores; memory hierarchy; caches; DRAM

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Muralidhara, S. P. (2011). Reducing Interference in Memory Hierarchy Resources Using Application Aware Management. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/12150

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Muralidhara, Sai Prashanth. “Reducing Interference in Memory Hierarchy Resources Using Application Aware Management.” 2011. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/12150.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Muralidhara, Sai Prashanth. “Reducing Interference in Memory Hierarchy Resources Using Application Aware Management.” 2011. Web. 04 Mar 2021.

Vancouver:

Muralidhara SP. Reducing Interference in Memory Hierarchy Resources Using Application Aware Management. [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/12150.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Muralidhara SP. Reducing Interference in Memory Hierarchy Resources Using Application Aware Management. [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/12150

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

15. Wen, Yicheng. Heterogeneous Sensor Fusion in Sensor Networks: A Language-theoretic Approach .

Degree: 2011, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/12213

► This dissertation presents a framework for feature-level heterogeneous sensor data fusion in sensor networks via a language-theoretic approach. Probabilistic finite state automata (PFSA) are used… (more)

▼ This dissertation presents a framework for feature-level heterogeneous sensor data fusion in sensor networks via a language-theoretic approach. Probabilistic finite state automata (PFSA) are used to model the semantic patterns in the observations of the sensors. A novel pattern discovery algorithm is developed to extract the PFSA model from symbol sequences. It is shown that this algorithm can capture semantic structures more effectively than the existing techniques. In order to formulate the data fusion problem for semantic features, a link is established between the formal language theory and functional analysis by constructing a Hilbert space over a class of stochastic regular languages represented by PFSA. New algebraic operations are defined for PFSA with a family of parametrized inner products. The norm induced by the inner product is interpreted as a measure of the information contained in PFSA. Applications of this technique are discussed in the following areas: a) Orthogonal projection in the Hilbert space to solve the model reduction problem of PFSA. Numerical examples and experimental results are provided to elucidate the process of model order reduction. b) Supervised learning of semantic features of heterogeneous sensor data in the product Hilbert space. The semantic features are combined optimally for classification using linear discriminant analysis (LDA). The proposed algorithm has a set of parameters that can be potentially configured by the users to adapt the algorithm to environment changes. The proposed algorithm is validated for object recognition at the US-Mexican border. An architecture of fusion-driven sensor networks is introduced to incorporate the proposed fusion framework in sensor networks. The network protocol, called dynamic time-space clustering (DSTC), and its heterogeneous version, are designed to adapt the network to the fusion algorithms. A sensor network for selectively tracking mobile targets is implemented in the network simulator NS-2 for both homogeneous and heterogeneous sensor fields in an urban scenario for validating the propose architecture. Advisors/Committee Members: Asok Ray, Dissertation Advisor/Co-Advisor, Asok Ray, Committee Chair/Co-Chair, Shashi Phoha, Committee Chair/Co-Chair, Qiang Du, Committee Member, Alok Sinha, Committee Member, Qian Wang, Committee Member, Ishanu Chattopadhyay, Committee Member.

Subjects/Keywords: wireless sensor network; pattern recognition; Information fusion

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wen, Y. (2011). Heterogeneous Sensor Fusion in Sensor Networks: A Language-theoretic Approach . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/12213

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wen, Yicheng. “Heterogeneous Sensor Fusion in Sensor Networks: A Language-theoretic Approach .” 2011. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/12213.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wen, Yicheng. “Heterogeneous Sensor Fusion in Sensor Networks: A Language-theoretic Approach .” 2011. Web. 04 Mar 2021.

Vancouver:

Wen Y. Heterogeneous Sensor Fusion in Sensor Networks: A Language-theoretic Approach . [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/12213.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wen Y. Heterogeneous Sensor Fusion in Sensor Networks: A Language-theoretic Approach . [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/12213

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

16. Zhao, Haiyu. Passive, Iterative, and Repetitive Control for Flexible Distributed Parameter Systems.

Degree: 2008, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/6805

► Many engineering structures have distributed parameter models governed by partial differential equations. Without damping, distributed flexible structures are not stable due to the infinite number… (more)

▼ Many engineering structures have distributed parameter models governed by partial differential equations. Without damping, distributed flexible structures are not stable due to the infinite number of resonances at natural frequencies. Bounded sinusoidal inputs at these frequencies can cause unbounded response. This thesis shows that Passive Control, Iterative Learning Control (ILC), and Repetitive Learning Control (RLC) can be designed to reduce tracking or regulation errors in response to bounded, periodic inputs. Distributed flexible strings, beams, membranes, plates, axially moving materials, electrostatic microbridges, and flexible whisker contact imagers are studied. Passive control using distributed or boundary damping is proven to stabilize the response of strings, beams, membranes, and plates. Damping ensures bounded response to bounded distributed and boundary inputs. Distributed viscous or Kelvin-Voigt material damping can guarantee pointwise or strong boundedness for strings and beams and weak boundedness for membranes and plates. Translational damping on one boundary stabilizes strings and beams. Damping on part of the boundary can also weakly stabilize the forced response of membranes and plates, provided the damped and undamped boundary normals satisfy certain conditions. For example, damping on half and one side of the boundary is sufficient for circular and rectangular domains, respectively. Iterative Learning Control provides precise tension and speed control of axially moving material systems to enable high speed processing of paper, plastics, fibers, and films. PD tension/speed control is proven to ensure strong and weak boundedness of distributed displacement and tension, respectively, in a single span axially moving material system. ILC provides the same theoretical result with half the speed error and 30% of the tension error of PD control using the same control effort. Repetitive Learning Control is applied to an electrostatic microbridge and a repetitive contact imager. Electrostatic microactuators are used extensively in MEMS sensors, RF switches, and microfluidic pumps. Due to high bandwidth operation, however, reduction of residual vibration using feedback control is difficult to implement. Feedforward RLC is designed, proven stable, and simulated for an electrostatic microbridge under a periodic desired spatial/time trajectory. High residual stresses in the microbridge mean that bending stiffness can be neglected and a pinned string model with uniform loading is appropriate. Squeeze film damping ensures boundedness of the distributed transverse displacement. Offline RLC processing of the average displacement as measured by capacitive sensing updates a waveform generator's parameters. Simulations show a 36% reduction in midspan overshoot under repetitive control. Repetitive contact imaging uses a flexible whisker attached to a two axis robot through a load cell. Assuming small deformations and rotations, the pitch axis decouples from yaw. The yaw axis, under PD control, sweeps… Advisors/Committee Members: Christopher Rahn, Committee Chair/Co-Chair, Kon Well Wang, Committee Member, Qian Wang, Committee Member, Farhan Gandhi, Committee Member.

Subjects/Keywords: Feedforward control; flexible distributed parameter systems; vibration control; BIBO stability

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhao, H. (2008). Passive, Iterative, and Repetitive Control for Flexible Distributed Parameter Systems. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/6805

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhao, Haiyu. “Passive, Iterative, and Repetitive Control for Flexible Distributed Parameter Systems.” 2008. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/6805.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhao, Haiyu. “Passive, Iterative, and Repetitive Control for Flexible Distributed Parameter Systems.” 2008. Web. 04 Mar 2021.

Vancouver:

Zhao H. Passive, Iterative, and Repetitive Control for Flexible Distributed Parameter Systems. [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/6805.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhao H. Passive, Iterative, and Repetitive Control for Flexible Distributed Parameter Systems. [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/6805

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

17. Lotfi Gaskarimahalle, Amir. VIBRATION CONTROL OF DISTRIBUTED PARAMETER SYSTEMS AND FLUIDIC FLEXIBLE MATRIX COMPOSITES .

Degree: 2009, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/10098

► Vibration degrades the performance of many mechanical systems, reducing the quality of manufactured products, producing noise, introducing fatigue in mechanical compo- nents, and generating an… (more)

▼ Vibration degrades the performance of many mechanical systems, reducing the quality of manufactured products, producing noise, introducing fatigue in mechanical compo- nents, and generating an uncomfortable environment for passengers. Vibration control is categorized as: active, passive, semi-active or hybrid, based on the power consumption of the control system and feedback or feedforward based on whether sensing is used to control vibration. In this thesis, we study input shaping control of Distributed Parame- ter Systems (DPS) and passive and semi-active vibration control using Fluidic Flexible Matrix Composites (F2MC). First, we extend input shaping control to one dimensional continua. Unlike discrete systems where the input is shaped only in the temporal domain, temporal and spatial input shaping can produce zero residual vibration in setpoint position control of distrib- uted strings and beams. For collocated and noncollocated boundary control of strings and domain control of strings and pinned beams, the response to step inputs is solved in closed form using delays. For a clamped beam model, a closed form in…nite modal series is used. The boundary controlled string can be setpoint regulated using two-pulse Zero Vibration (ZV) and three-pulse Zero Vibration and Derivative (ZVD) shapers but ZVD is not more robust to parameter variations than ZV, a unique characteristic of second-order PDE systems. Noncollocated ZV and ZVD boundary control enables rigid body translation of a string with zero residual vibration. Domain controlled strings and pinned beams with spatial input distributions that satisfy certain orthogonality condi- tions (e.g. midspan point load or uniformly distributed load) can be setpoint regulated with shaped inputs. For the cantilevered beam, modal shaping of the input distribution and ZV or ZVD temporal shaping drives the tip to the desired position with zero residual vibration. A command shaping approach in vibration control using F2MC tubes as variable sti¤ness structures is studied in the third chapter. The apparent sti¤ness of F2MC tubes can be changed using a variable ori…ce valve. With …ber reinforcement, the volume inside the tube may change with external load. With an open valve, the liquid is free to move in or out of the tube, so the apparent sti¤ness does not change. When the valve is closed, the high bulk modulus liquid is con…ned, which resists the volume change and causes the apparent sti¤ness of the tube to increase. The equations of motion of an F2MC-mass system is derived using a 3-D elasticity model and the energy method. A reduced order model is then developed for fully-open and fully-closed valves. A Skyhook control that cycles the valve between open and closed, asymptotically decays the vibration. A Zero Vibration (ZV) Sti¤ness Shaping technique is introduced to suppress the vibration in …nite time. A sensitivity analysis of the ZV Sti¤ness Shaper studies the robustness to parametric uncertainties. We also investigate passive and semi-active vibration control using F2MC… Advisors/Committee Members: Christopher Rahn, Dissertation Advisor/Co-Advisor, Christopher Rahn, Committee Chair/Co-Chair, Alok Sinha, Committee Member, Qian Wang, Committee Member, George A Lesieutre, Committee Member.

Subjects/Keywords: Semi-active Control; Tuned Vibration Absorbers; Variable Stiffness Systems; Input Shaping; Vibration Control

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lotfi Gaskarimahalle, A. (2009). VIBRATION CONTROL OF DISTRIBUTED PARAMETER SYSTEMS AND FLUIDIC FLEXIBLE MATRIX COMPOSITES . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/10098

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lotfi Gaskarimahalle, Amir. “VIBRATION CONTROL OF DISTRIBUTED PARAMETER SYSTEMS AND FLUIDIC FLEXIBLE MATRIX COMPOSITES .” 2009. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/10098.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lotfi Gaskarimahalle, Amir. “VIBRATION CONTROL OF DISTRIBUTED PARAMETER SYSTEMS AND FLUIDIC FLEXIBLE MATRIX COMPOSITES .” 2009. Web. 04 Mar 2021.

Vancouver:

Lotfi Gaskarimahalle A. VIBRATION CONTROL OF DISTRIBUTED PARAMETER SYSTEMS AND FLUIDIC FLEXIBLE MATRIX COMPOSITES . [Internet] [Thesis]. Penn State University; 2009. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/10098.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lotfi Gaskarimahalle A. VIBRATION CONTROL OF DISTRIBUTED PARAMETER SYSTEMS AND FLUIDIC FLEXIBLE MATRIX COMPOSITES . [Thesis]. Penn State University; 2009. Available from: https://submit-etda.libraries.psu.edu/catalog/10098

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

18. Guo, Wei. Flight Control Design for Rotorcraft with Variable Rotor Speed.

Degree: 2009, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/10241

► Flight control design issues for rotorcraft with variable rotor speed are investigated, and new design methodologies are developed to deal with the challenges of variable… (more)

▼ Flight control design issues for rotorcraft with variable rotor speed are investigated, and new design methodologies are developed to deal with the challenges of variable rotor speed. The benefits of using variable rotor speed for rotorcraft are explored with a rotor speed optimization study using a modified GENHEL model of UH-60A Blackhawk. The optimization results recommend to use the optimal rotor speed in each flight condition to improve the helicopter performance. The efforts are made to accommodate the optimal rotor speed schedule into the flight control system design and also address the stability issues due to the rotor speed variation. The rotor speed optimization results show significant performance improvements can be achieved with moderate reductions in rotor speed. The objective of the control design is to accommodate these rotor speed variations, while achieving desired flying qualities and maneuver performance. A gain scheduled model following/model inversion controller is used to control the roll, pitch, yaw, heave, and rotor speed degrees of freedom. Rotor speed is treated as a redundant control effector for the heave axis, and different control allocation schemes are investigated. The controllers are evaluated based on step responses and the ADS-33E height response requirement. Results show that dynamic variation in rotor speed can improve maximum climb rate and flying qualities for moderate to large commands in vertical speed, but that non-linear effects present significant challenges when integrating control of the aircraft and the engine. The effects of reduced rotor speeds on stability margins, torque required, and stability issues are also studied. A power command system in the vertical axis is designed to incorporate variable rotor speed while handling torque limits and other constraints. The vertical axis controller uses a fixed nonlinear mapping to find the combination of collective pitch and rotor speed to optimize performance in level flight, climbing/descending flight, and steady turns. In this scheme, the controller is open-loop, making it an inexpensive and reliable solution. The mapping is designed to produce a desired power level for a given pilot input. Thus the mapping can take into account the performance limits associated with the vertical axis such as power limits, torque limits, and maximum rate of descent. A model following controller is implemented for the pitch, roll, and yaw axes. The piloted simulation was performed to evaluate the controller. The impact of variable rotor speed on closed loop stability of rotorcraft is discussed. The model following controller can provide high bandwidth control and improve performance using variable rotor speed. However, reduction of rotor speed can result in rotor body coupling and even instability. A rotor state feedback control law can be designed independently and easily integrated into the baseline model following control architecture. Simulations were performed to verify the effectiveness of RSF control to stabilize the rotorcraft… Advisors/Committee Members: Joseph Francis Horn, Dissertation Advisor/Co-Advisor, Joseph Francis Horn, Committee Chair/Co-Chair, Jack W Langelaan, Committee Member, Edward C Smith, Committee Member, Qian Wang, Committee Member.

Subjects/Keywords: rotorcraft; flight control; variable rotor speed; rotor state feedback

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Guo, W. (2009). Flight Control Design for Rotorcraft with Variable Rotor Speed. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/10241

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Guo, Wei. “Flight Control Design for Rotorcraft with Variable Rotor Speed.” 2009. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/10241.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Guo, Wei. “Flight Control Design for Rotorcraft with Variable Rotor Speed.” 2009. Web. 04 Mar 2021.

Vancouver:

Guo W. Flight Control Design for Rotorcraft with Variable Rotor Speed. [Internet] [Thesis]. Penn State University; 2009. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/10241.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Guo W. Flight Control Design for Rotorcraft with Variable Rotor Speed. [Thesis]. Penn State University; 2009. Available from: https://submit-etda.libraries.psu.edu/catalog/10241

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

19. Khatkhate, Amol Madhav. Anomaly Detection in Electromechanical Systems using Symbolic Dynamics.

Degree: 2008, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/7042

► An anomaly is defined as a deviation from the nominal behavior of a dynamical system and is often associated with parametric and non-parametric changes that… (more)

▼ An anomaly is defined as a deviation from the nominal behavior of a dynamical system and is often associated with parametric and non-parametric changes that may gradually evolve in time. Anomalies may manifest themselves with self excitation, or under excitation of certain exogenous stimuli. These anomalies may be benign or malignant depending on their impact on the mission objectives and operating conditions. Major catastrophic failures in large scale engineering systems (e.g., aircraft, power plants and turbo-machinery) can possibly be averted if the malignant anomalies are detected at an early stage. This dissertation experimentally validates a novel method for anomaly detection in electromechanical systems, derived from time series data of pertinent measured variable(s). The core concept of the anomaly detection method is Symbolic Time Series Analysis (STSA) that is built upon the principles of Automata Theory, Information Theory, and Pattern Recognition. The anomaly detection methodology, investigated in this dissertation, consists of two parts: Forward problem - The objective in the forward problem is to learn how the grammar of the underlying system dynamics evolves as the system parameters gradually change. The forward problem is that of learning where the value of a parameter is associated with an anomaly measure. Inverse problem - The inverse problem is that of inferring the system parameters based on the observed asymptotic behavior. This dissertation deals with both the forward and inverse problems. The performance of this anomaly detection method is compared with that of other existing pattern recognition techniques from the perspectives of early detection of fatigue damage in polycrystalline alloy structures. The experimental apparatus, on which the anomaly detection method is tested, is a multi-degree of freedom mass-beam structure excited by oscillatory motion of two electromagnetic shakers. The evolution of fatigue crack damage at one of the failure sites is detected from symbolic time series analysis of displacement sensor signal. Also, the dissertation quantifies the progression of damage using other mechanical sensors like accelerometers and load cells and damage sensing devices like ultrasonic flaw detectors. Another mechanical motion apparatus is designed and the accelerometer time series data, generated from this apparatus, has been utilized to detect the change in e®ective mass/moment of inertia of the system components. The dissertation also exemplifies usage of these techniques to an industrial application as described below. Industrial Application - Critical components such as bearings, seals, and couplings are subjected to unbalanced axial/radial loads and excessive machine vibrations due to shaft misalignment in rotating machinery. The dissertation presents Symbolic Time Series Analysis (STSA) of bearing acceleration for detection and estimation of parametric changes in flexible disc/diaphragm couplings due to angular misalignment between shafts. The concept is validated on a simulation… Advisors/Committee Members: Asok Ray, Committee Chair/Co-Chair, Eric Russell Marsh, Committee Member, Jeffrey Louis Schiano, Committee Member, Dr Qian Wang, Committee Member, Eric Keller, Committee Member.

Subjects/Keywords: structural health monitoring; symbolic dynamics; diagnostics; prognostics; electromechanical systems; pattern identification

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Khatkhate, A. M. (2008). Anomaly Detection in Electromechanical Systems using Symbolic Dynamics. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/7042

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Khatkhate, Amol Madhav. “Anomaly Detection in Electromechanical Systems using Symbolic Dynamics.” 2008. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/7042.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Khatkhate, Amol Madhav. “Anomaly Detection in Electromechanical Systems using Symbolic Dynamics.” 2008. Web. 04 Mar 2021.

Vancouver:

Khatkhate AM. Anomaly Detection in Electromechanical Systems using Symbolic Dynamics. [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/7042.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Khatkhate AM. Anomaly Detection in Electromechanical Systems using Symbolic Dynamics. [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/7042

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

20. Smith, Kandler A. Electrochemical Modeling, Estimation and Control of Lithium Ion Batteries.

Degree: 2008, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/7376

► Batteries directly contribute to the advancement of technologies ranging from portable electronics to fuel-efficient vehicles. In high power applications such as hybrid electric vehicles (HEVs),… (more)

▼ Batteries directly contribute to the advancement of technologies ranging from portable electronics to fuel-efficient vehicles. In high power applications such as hybrid electric vehicles (HEVs), monitoring algorithms use current and voltage measurements to estimate battery state of charge (SOC) and available power. Despite increased cost, these systems commonly employ conservative, oversized batteries due to poor prediction of current/voltage dynamics and imprecise real-time estimation. This dissertation introduces a general, electrochemical model-based approach for safe and efficient integration of Li-ion batteries into transient, pulse power-type systems. A transient solid-state diffusion model is incorporated into a previously developed 1D electrochemical model. The nonlinear model, solving 4 coupled partial differential equations by a computational fluid dynamics (CFD) technique, is validated against low rate constant current, pulse power, and transient driving cycle data sets from a 6 Ah Li-ion HEV battery. Solid-state Li transport (diffusion) significantly limits high rate performance, and end of discharge at the 2.7 V minimum limit is caused by depleted/saturated active material surface concentrations in the negative/positive electrodes for pulses lasting longer than around 10 seconds. The 3.9 V maximum limit, meant to protect the negative electrode from side reactions such as lithium plating, is overly conservative for pulse charging. Increased power capability may be realized by using a real-time electrochemical model to estimate internal states and control the battery within appropriate limits. Development of a fast, stable, and accurate model is difficult however, given the infinite-dimensional, distributed nonlinear processes governing battery dynamics. Here, an impedance model is derived from the electrochemical kinetic, species and charge transport equations and, using a model order reduction technique developed herein, the high order transfer functions/matrices are numerically reduced to an observable/controllable state variable model in modal form. Open circuit potential and electrode surface concentration nonlinearities are explicitly approximated in the model output equation on a local and electrode-averaged basis, respectively. Validated against the 313th order CFD model, a 12th order state variable model with 0-10 Hz bandwidth predicts terminal voltage to within 25 mV (<1%) for pulse and constant current profiles at rates up to 50C. The modeling methodology is valid for all types of porous electrode Li-ion batteries not operating under severe electrolyte transport limitations. A linear Kalman filter is designed for real-time estimation of internal potentials, concentration gradients, and SOC. A reference current governor predicts operating margin with respect to electrode side reactions and surface depletion/saturation conditions responsible for damage and sudden loss of power. Estimates are compared with the nonlinear CFD model. The linear filter gives to within ~2% performance in the 30-70%… Advisors/Committee Members: Chao Yang Wang, Committee Chair/Co-Chair, Christopher Rahn, Committee Chair/Co-Chair, Qian Wang, Committee Member, Joseph Paul Cusumano, Committee Member, Karen Ann Thole, Committee Member.

Subjects/Keywords: lithium ion; battery; hybrid electric vehicle; model order reduction; diffusion systems; state of charge estimation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Smith, K. A. (2008). Electrochemical Modeling, Estimation and Control of Lithium Ion Batteries. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/7376

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Smith, Kandler A. “Electrochemical Modeling, Estimation and Control of Lithium Ion Batteries.” 2008. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/7376.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Smith, Kandler A. “Electrochemical Modeling, Estimation and Control of Lithium Ion Batteries.” 2008. Web. 04 Mar 2021.

Vancouver:

Smith KA. Electrochemical Modeling, Estimation and Control of Lithium Ion Batteries. [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/7376.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Smith KA. Electrochemical Modeling, Estimation and Control of Lithium Ion Batteries. [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/7376

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

21. Tolani, Devendra Kumar. INTEGRATED HEALTH MANAGEMENT AND CONTROL OF COMPLEX DYNAMICAL SYSTEMS.

Degree: 2008, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/6642

► A comprehensive control and health management strategy for human-engineered complex dynamical systems is formulated for achieving high performance and reliability over a wide range of… (more)

▼ A comprehensive control and health management strategy for human-engineered complex dynamical systems is formulated for achieving high performance and reliability over a wide range of operation. Results from diverse research areas such as Probabilistic Robust Control (PRC), Damage Mitigating/Life Extending Control (DMC), Discrete Event Supervisory (DES) Control, Symbolic Time Series Analysis (STSA) and Health and Usage Monitoring System (HUMS) have been employed to achieve this goal. Continuous-domain control modules at the lower level are synthesized by PRC and DMC theories, whereas the upper-level supervision is based on DES control theory. In the PRC approach, by allowing different levels of risk under different fight conditions, the control system can achieve the desired trade o® between stability robustness and nominal performance. In the DMC approach, component damage is incorporated in the control law to reduce the damage rate for enhanced structural durability. The DES controller monitors the system performance and, based on the mission requirements (e.g., performance metrics and level of damage mitigation), switches among various lower-level controllers. The core idea is to design a framework where the DES controller at the upper-level, mimics human intelligence and makes appropriate decisions to satisfy mission requirements, enhance system performance and structural durability. Recently developed tools in STSA have been used for anomaly detection and failure prognosis. The DMC deals with the usage monitoring or operational control part of health management, where as the issue of health monitoring is addressed by the anomaly detection tools. The proposed decision and control architecture has been validated on two test-beds, simulating the operations of rotorcraft dynamics and aircraft propulsion. Advisors/Committee Members: Asok Ray, Committee Chair/Co-Chair, Joseph Francis Horn, Committee Chair/Co-Chair, Constantino Manuel Lagoa, Committee Member, Alok Sinha, Committee Member, Qian Wang, Committee Member.

Subjects/Keywords: Anomaly detection; health management; prognosis; discrete event system; probabilistic robust control; damage mitigating control; life extending control

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APA (6^th Edition):

Tolani, D. K. (2008). INTEGRATED HEALTH MANAGEMENT AND CONTROL OF COMPLEX DYNAMICAL SYSTEMS. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/6642

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tolani, Devendra Kumar. “INTEGRATED HEALTH MANAGEMENT AND CONTROL OF COMPLEX DYNAMICAL SYSTEMS.” 2008. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/6642.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tolani, Devendra Kumar. “INTEGRATED HEALTH MANAGEMENT AND CONTROL OF COMPLEX DYNAMICAL SYSTEMS.” 2008. Web. 04 Mar 2021.

Vancouver:

Tolani DK. INTEGRATED HEALTH MANAGEMENT AND CONTROL OF COMPLEX DYNAMICAL SYSTEMS. [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/6642.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tolani DK. INTEGRATED HEALTH MANAGEMENT AND CONTROL OF COMPLEX DYNAMICAL SYSTEMS. [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/6642

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

22. Lee, Dooyong. Simulation and Control of a Helicopter Operating in a Ship Airwake.

Degree: 2008, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/6756

► This thesis describes a study in simulation and control of a helicopter operating in proximity to a ship. The helicopter/ship combination used in the study… (more)

▼ This thesis describes a study in simulation and control of a helicopter operating in proximity to a ship. The helicopter/ship combination used in the study is a UH-60A helicopter operating off an LHA class ship. This represents the same aircraft ship combination used in the JSHIP program. The flight dynamics model is based on the GENHEL software and this flight dynamics model has been updated to include high-order dynamic inflow model and gust penetration effects of the ship airwake. To simulate the pilot control inputs for typical shipboard operations, an optimal control model of the human pilot is developed. The pilot model can be tuned to achieve different tracking performances based on a desired crossover frequency in each control axis and is designed to operate over a range of airspeeds using a simple gain scheduling algorithm. The pilot model is then used to predict pilot workload for shipboard operations in two different wind-over-deck conditions. Validation studies are conducted using both time and frequency domain analyses to understand the impact of a time-varying ship airwake on the pilot control activity for the approach and departure operations. The pilot control input autospectra predicted from the simulation model are compared to those of flight test data from the JSHIP program. It is found that the control activities are similar in low frequency range but underestimate in magnitude in the high frequency range (over 1.5 Hz). There is clear evidence that the human pilot is continually moving cyclic stick in the maneuver. At this stage of the study no attempt has been made to optimize the parameters of the human pilot model. The paper also discusses the application of a stochastic airwake model for more efficient simulation. This new airwake model is derived from the simulation with the full CFD airwake by extracting an equivalent six-dimensional gust vector. The spectral properties of the gust components are then analyzed, and shaping filters are designed to simulate the gusts when driven by white noise. It is proposed that the stochastic gust model can be used to optimize the automatic flight control system in order to improve disturbance rejection properties of the aircraft. A stability augmentation system (SAS) is optimized for a UH-60 helicopter operating in the turbulent ship airwake. For disturbance rejection, a new performance specification is designed based on the power spectral density of the transfer function from the gust inputs to aircraft rate responses. The baseline limited authority SAS is modified and optimized using CONDUIT (Control Designer's Unified Interface) in order to improve handling-qualities and stability, and to minimize a weighted objective of gust responses. In addition, a {H_infty} controller is designed to provide an alternative SAS configuration. The optimized SAS and {H_infty} SAS are then tested using the non-linear simulation model with time-varying airwake. Time domain and frequency domain analyses of the simulation show that the modified SAS results in… Advisors/Committee Members: Joseph Francis Horn, Committee Chair/Co-Chair, Lyle Norman Long, Committee Member, Edward C Smith, Committee Member, Qian Wang, Committee Member.

Subjects/Keywords: helicopter simulation; stochastic airwake; pilot model; validation; SAS optimization

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lee, D. (2008). Simulation and Control of a Helicopter Operating in a Ship Airwake. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/6756

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lee, Dooyong. “Simulation and Control of a Helicopter Operating in a Ship Airwake.” 2008. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/6756.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lee, Dooyong. “Simulation and Control of a Helicopter Operating in a Ship Airwake.” 2008. Web. 04 Mar 2021.

Vancouver:

Lee D. Simulation and Control of a Helicopter Operating in a Ship Airwake. [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/6756.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lee D. Simulation and Control of a Helicopter Operating in a Ship Airwake. [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/6756

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

23. Chattopadhyay, Ishanu. Quantitative Control of Probabilistic Discrete Event Systems: A Measure-theoretic Approach.

Degree: 2008, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/7161

► The theory of Supervisory Control for Discrete Event Systems (DES), originally initiated by Ramadge and Wonham, is based on a non-probabilistic language framework. However, any… (more)

▼ The theory of Supervisory Control for Discrete Event Systems (DES), originally initiated by Ramadge and Wonham, is based on a non-probabilistic language framework. However, any practical model for an actual physical process (which inherently involves modeling errors and noise corrupted observations) by a finite state automaton requires consideration of event occurrence probabilities. Garg, Kumar and others investigated probabilistic language (p-language) models and proposed techniques of supervisor design based on a direct generalization of Wonham's original idea of DES supervision. However, the technique involves complicated methodologies for specification of control objectives and is not amenable to online control reconfigurations. The work reported in this thesis takes an alternate approach. Building on the preliminary concept of measure of regular languages, first reported by Ray and his co-workers, a comprehensive methodology for control of arbitrary finite state probabilistic processes is developed. Several possible generalizations of the language measure is presented which extend the measure to the entire class of regular p-languages thereby removing the previously existing restriction of a non-zero termination probability at each state. The most important among these generalizations is the "renormalized" measure which is used to develop an algorithm for deriving the optimal supervision policy for both terminating and non-terminating p-languages. It is shown that the computed supervisor is optimal in the rigorous mathematical sense of elementwise maximizing the langauge measure vector for the controlled plant behavior and is efficiently computable. Further, a completely general analysis of event unobservability in DES is presented along with the rigorous derivation of two important decidability results on the State Determinacy problem. It is shown that the optimal control algorithm (referred to above) can be modified to yield an online implementable supervision algorithm that takes into account unobservable event occurrences in the underlying plant and achieves performance which is optimal under this limited information. The theoretical results are verified and validated in simulated examples and in actual implementations on mobile robotic platforms. Advisors/Committee Members: Asok Ray, Committee Chair/Co-Chair, Alok Sinha, Committee Member, Dr Qian Wang, Committee Member, Joseph Francis Horn, Committee Member, Eric Keller, Committee Member.

Subjects/Keywords: Discrete Event Systems; Regular Languages; Language Measure; Optimal Control; Partial Observation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chattopadhyay, I. (2008). Quantitative Control of Probabilistic Discrete Event Systems: A Measure-theoretic Approach. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/7161

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chattopadhyay, Ishanu. “Quantitative Control of Probabilistic Discrete Event Systems: A Measure-theoretic Approach.” 2008. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/7161.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chattopadhyay, Ishanu. “Quantitative Control of Probabilistic Discrete Event Systems: A Measure-theoretic Approach.” 2008. Web. 04 Mar 2021.

Vancouver:

Chattopadhyay I. Quantitative Control of Probabilistic Discrete Event Systems: A Measure-theoretic Approach. [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/7161.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chattopadhyay I. Quantitative Control of Probabilistic Discrete Event Systems: A Measure-theoretic Approach. [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/7161

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

24. Ding, Yang. Dynamic Resource Management for Energy-efficiency and Quality-of-Service in Chip Multiprocessors .

Degree: 2010, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/11311

► Chip multiprocessors (CMPs) are becoming increasingly popular as performance improvements brought by increasing clock frequency alone are approaching their limits. Other factors, such as ease… (more)

▼ Chip multiprocessors (CMPs) are becoming increasingly popular as performance improvements brought by increasing clock frequency alone are approaching their limits. Other factors, such as ease of verification and validation of individual cores (as compared to complex unicore architectures) and the ability to exploit both thread level (coarse grain) and instruction level (fine grain) parallelism, also boost trends towards chip multiprocessing. While CMPs have already made their way into the commercial market, software support for CMPs is still in its infancy, and is expected to be the main roadblock to the effective use of CMPs. As the number of processor cores is expected to keep increasing, how to fully utilize the abundant computing resources on CMPs becomes a critical issue. Two possible ways of exploiting CMPs include a single application scenario and a multiple application scenario. In the first case, the entire CMP is dedicated to a single application at a time. This option can be effectively exploited by applications that are getting increasingly complex and data intensive (particularly large codes from scientific computing, database and embedded image/video processing domains), unless the number of cores on the chip is increased beyond a certain count. In the multi-application scenario, which is also called multi-tasking, multiple (independent) applications are executed on the CMP at the same time. This is expected to be an important alternative at least in the short term especially for applications that have limited parallelism. Parallelization has been studied for many years since the invention of the first parallel machine. However, there are still a lot of open questions to be solved such as compiler-based automatic parallelization. The multi-core era brings new challenges into the research scope of parallel architecture and applications. For example, resources on a single chip such as caches and inter-connections are now shared by multiple processing elements, which is not the case for traditional parallel or distributed systems. Motivated by these observations, this dissertation work focuses on how to adapt application executions dynamically to improve the energy-efficiency and quality-of-service by utilizing the application level characteristics in the resource management. There are two major reasons to study the dynamic adaptations of applications. First, an application can have different characteristics and computing requirements during different phases of computations. Second, future computer architecture will have parameter variations and heterogeneity due to process variations or heterogeneous system design. My work investigates dynamic application adaptations, the partition of processors cores among multiple applications, and different thread scheduling schemes for both threads of the same application and threads across concurrently-running independent applications. Performance has been the most important metric for computing in the past. This has been changed recently as optimization metrics… Advisors/Committee Members: Mahmut Taylan Kandemir, Dissertation Advisor/Co-Advisor, Mahmut Taylan Kandemir, Committee Chair/Co-Chair, Padma Raghavan, Committee Member, Mary Jane Irwin, Committee Member, Qian Wang, Committee Member.

Subjects/Keywords: dynamic resource management; runtime system; Chip Multiprocessors; energy-efficiency; QoS

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ding, Y. (2010). Dynamic Resource Management for Energy-efficiency and Quality-of-Service in Chip Multiprocessors . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/11311

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ding, Yang. “Dynamic Resource Management for Energy-efficiency and Quality-of-Service in Chip Multiprocessors .” 2010. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/11311.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ding, Yang. “Dynamic Resource Management for Energy-efficiency and Quality-of-Service in Chip Multiprocessors .” 2010. Web. 04 Mar 2021.

Vancouver:

Ding Y. Dynamic Resource Management for Energy-efficiency and Quality-of-Service in Chip Multiprocessors . [Internet] [Thesis]. Penn State University; 2010. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/11311.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ding Y. Dynamic Resource Management for Energy-efficiency and Quality-of-Service in Chip Multiprocessors . [Thesis]. Penn State University; 2010. Available from: https://submit-etda.libraries.psu.edu/catalog/11311

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

25. Ding, Tao. Systems theoretic approach to textured image and video processing .

Degree: 2008, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/7906

► Control Theory and Image Processing are all exciting research areas with great power for the applications to wide fields. There are many common methods in… (more)

▼ Control Theory and Image Processing are all exciting research areas with great power for the applications to wide fields. There are many common methods in system analysis, design and development in these two different fields. The progress of these two area also shows that the techniques developed to solve the problems of one area often find applications to the other one. The theme of this dissertation is systems theoretical approach to textured image processing and video processing. It is an attempt to setup and solve the textured image processing problem from a viewpoint of control, especially the study of robust identification and robust control theory. The work focus on texture modelling, synthesis, recognition and classification. A novel image modelling and model reduction approach is introduced. It is shown how recently developed robust identification techniques can be applied to find models for textures which are capable of image compression and reconstruction. On the other hand, video inpainting problem is addressed under a framework combining Local Linear Embedding (LLE), Rank Minimization Interpolation (RMI) and Radial Basis Function (RBF) Mapping, leading to a simple, computationally attractive, dynamic video inpainting algorithm. Proceeding along the same lines, rank based approaches are proposed to solve event detection and track matching problem. The contribution of this dissertation can be viewed both as theoretical and practical: It provides answers to the robust identification of 2-D discrete, quarter causal, shift invariant systems that have a periodic impulse response, which is also of great practical interest in image processing, distributed systems and so on. Moreover, by introducing rank minimization algorithm, a new solution is provided to the problem of video inpainting, which can deal with video inpainting under the conditions of non – periodic target motions, non – stationary backgrounds and moving cameras. Finally, with the idea to detect dynamics changes by parsing it into segments according to the complexity of the model required to explain the observed data, a rank based approach is introduced to solve track stitching and dynamic event detection in a unified way. Advisors/Committee Members: Mario Sznaier, Committee Chair/Co-Chair, Constantino Manuel Lagoa, Committee Chair/Co-Chair, Octavia I Camps, Committee Member, Qian Wang, Committee Member, William Kenneth Jenkins, Committee Member.

Subjects/Keywords: video processing; image processing; texture; control theory; Systems theory; computer vision

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ding, T. (2008). Systems theoretic approach to textured image and video processing . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/7906

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ding, Tao. “Systems theoretic approach to textured image and video processing .” 2008. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/7906.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ding, Tao. “Systems theoretic approach to textured image and video processing .” 2008. Web. 04 Mar 2021.

Vancouver:

Ding T. Systems theoretic approach to textured image and video processing . [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/7906.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ding T. Systems theoretic approach to textured image and video processing . [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/7906

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

26. Ma, Wenjing. Semi-blind Robust Identification and Model (In)Validation .

Degree: 2008, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/8026

► In this thesis, we study a so-called semi-blind robust identification motivated from the fact that sometimes for system Identification only partial input data is exactly… (more)

Subjects/Keywords: Fault Detection and Isolation; Control Theory; Model (In)Validation; Control-Oriented System Modeling; Robust Identification; Human Motion and Tracking

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ma, W. (2008). Semi-blind Robust Identification and Model (In)Validation . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/8026

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ma, Wenjing. “Semi-blind Robust Identification and Model (In)Validation .” 2008. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/8026.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ma, Wenjing. “Semi-blind Robust Identification and Model (In)Validation .” 2008. Web. 04 Mar 2021.

Vancouver:

Ma W. Semi-blind Robust Identification and Model (In)Validation . [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/8026.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ma W. Semi-blind Robust Identification and Model (In)Validation . [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/8026

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

27. Zhang, Jianyong. SELF-TUNING STORAGE SYSTEMS FOR PERFORMANCE VIRTUALIZATION.

Degree: 2008, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/6886

► The cost of the storage management has been the dominant factor in the Total Cost of Ownership of a computer system. In order to reduce… (more)

▼ The cost of the storage management has been the dominant factor in the Total Cost of Ownership of a computer system. In order to reduce it, a growing trend is to make the storage system self-managing. This thesis investigates two important topics for self-managing storage system design: (1) workload characterization and generation; (2) online QoS enforcement and self-tuning. Understanding workloads is critical for a self-managing storage system design. This thesis presents a synthetic workload generator for TPC-H, an important decision-support commercial workload, by completely characterizing the arrival and access patterns of its queries. The synthesized block-level traces for 22 TPC-H queuries are shown to accurately mimic the behavior of a real trace in terms of response time characteristics for each TPC-H query. Self-tuning is an important aspect of self-management. For a self-tuning storage system, adaptive resource management plays a critical role. One issue is to provide performance virtualization for multiple applications to share a consolidated storage utility in order to meet their Service Level Objecives (SLOs). This thesis presents a 2-level scheduling framework. This framework uses a low-level feedback-driven request scheduler, called AVATAR, that is intended to meet the latency bounds determined by the SLO. The load imposed on AVATAR is regulated by a high-level rate controller, called SARC, to insulate the users from each other. Using extensive I/O traces and a detailed storage simulator, it is demonstrated that this 2-level framework can simultaneously meet latency and throughput requirements imposed by an SLO, without requiring extensive knowledge of the underlying storage system. Business continuance requires non-disruptive data migration, which is another important issue in resource management. In such situation, a migration task utilizes spare bandwidth left by client applications, in order to minimize the impact on them. However, a migration task also has its own requirements. Especially, it is desirable to complete a migration task in a specified time period. This thesis presents an opportunistic data migration scheme with an adaptive rate controller. With extensive experiments, it is shown that the scheme is effective and efficient to meet requirements for migration. Advisors/Committee Members: Anand Sivasubramaniam, Committee Chair/Co-Chair, Mahmut Taylan Kandemir, Committee Member, Wang Chien Lee, Committee Member, Qian Wang, Committee Member, Hubertus Franke, Committee Member.

Subjects/Keywords: storage systems; self-managing and self-tuning; I/O scheduling; quality of service; data migration; feedback control

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhang, J. (2008). SELF-TUNING STORAGE SYSTEMS FOR PERFORMANCE VIRTUALIZATION. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/6886

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhang, Jianyong. “SELF-TUNING STORAGE SYSTEMS FOR PERFORMANCE VIRTUALIZATION.” 2008. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/6886.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhang, Jianyong. “SELF-TUNING STORAGE SYSTEMS FOR PERFORMANCE VIRTUALIZATION.” 2008. Web. 04 Mar 2021.

Vancouver:

Zhang J. SELF-TUNING STORAGE SYSTEMS FOR PERFORMANCE VIRTUALIZATION. [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/6886.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhang J. SELF-TUNING STORAGE SYSTEMS FOR PERFORMANCE VIRTUALIZATION. [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/6886

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

28. Nath, Partho. Content Addressable Data Management.

Degree: 2008, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/7620

► A direct implication of both the industry and academia proclaiming the Age of Tera-(even the Peta)-scale computing, is that applications have become more data intensive… (more)

Subjects/Keywords: content addressable storage; content addressable parallel file system; internet suspend resume

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APA (6^th Edition):

Nath, P. (2008). Content Addressable Data Management. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/7620

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nath, Partho. “Content Addressable Data Management.” 2008. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/7620.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nath, Partho. “Content Addressable Data Management.” 2008. Web. 04 Mar 2021.

Vancouver:

Nath P. Content Addressable Data Management. [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/7620.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nath P. Content Addressable Data Management. [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/7620

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

29. Kim, Youngjae. DESIGN CHALLENGES ON ENTERPRISE-SCALE STORAGE SYSTEMS EMPLOYING HARD DRIVES AND NAND FLASH BASED SOLID-STATE DRIVES .

Degree: 2009, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/10128

► Flash memory overcomes some key shortcomings of hard disk drives (HDDs), including faster access to non-sequential data and lower power consumption. Economic forces, driven by… (more)

▼ Flash memory overcomes some key shortcomings of hard disk drives (HDDs), including faster access to non-sequential data and lower power consumption. Economic forces, driven by the desire to introduce flash into the enterprise market without changing existing software based, have resulted in the emergence of solid state drives (SSDs), flash packaged in HDD from factors and capable of working with device drivers and I/O buses designed for HDDs. Unlike the use of DRAM for caching or buffering, however, certain idiosyncrasies of SSDs make their integration into HDD-based systems non-trivial. Flash memory suffers from limits on its reliability, in an order of magnitude more expensive than the disk, and can be sometimes even slower than the HDD (due to excessive GC induced by high intensity of random writes). Given the complementary properties of HDDs and SDDs in terms of cost, performance, and lifetime, the current consensus among several storage experts is to view SSDs not as a replacement for HDD but rather as a complementary device within the storage hierarchy. In my dissertation, I designed and evaluated such a hybrid system called HybridStore to provide (a) improved capacity planning techniques to administrators with the overall goal of operating within cost-budgets and (b) improved performance/lifetime guarantees during episodes of deviations from expected workloads through several novel mechanisms such as fragmentation busting and write regulation. As an illustrative example of HybridStore’s efficacy, a combination of 1 SSD and 6 low-speed, cheaper and higher capacity HDDs is recommended the most cost-effective storage configuration in HybridStore for a predominantly random-write dominant I/O trace from an OLTP application running at a large financial institution. Also, HybridStore employing HDD with small SSD is able to reduce the average response time for Financial trace by about 71% as compared to a HDD-based system. In addition to HybridStore project, I developed a novel design technique of the Flash Translation Layer (FTL) in the SSD. It provides improved performance, reduced garbage collection overhead, and better overloaded behavior compared to state-of- the art FTL schemes. For example, the Financial trace shows a 78% improvement in average response time (due to a 3-fold reduction in operations of the garbage collector), compared to a state-of-the-art FTL scheme. Finally, I also developed and validated flash simulation framework call FlashSim. While a number of well-regarded simulation environments exist for HDDs, the same is not yet true for SSDs. This is due to SSDs having been in the storage market for relatively less time as well as the lack of information (hardware configuration and software methods) about state-of-the-art SSDs that is publicly available. FlashSim aimed at filling this void in performance evaluation of emerging storage systems that employ SSDs. Advisors/Committee Members: Dr Anand Sivasubramaniam And Dr Bhuvan Urgaonkar, Dissertation Advisor/Co-Advisor, Anand Sivasubramaniam, Committee Chair/Co-Chair, Bhuvan Urgaonkar, Committee Chair/Co-Chair, Prasenjit Mitra, Committee Member, Qian Wang, Committee Member, Raj Acharya, Committee Member.

Subjects/Keywords: Storage Systems; Flash Memory

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kim, Y. (2009). DESIGN CHALLENGES ON ENTERPRISE-SCALE STORAGE SYSTEMS EMPLOYING HARD DRIVES AND NAND FLASH BASED SOLID-STATE DRIVES . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/10128

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kim, Youngjae. “DESIGN CHALLENGES ON ENTERPRISE-SCALE STORAGE SYSTEMS EMPLOYING HARD DRIVES AND NAND FLASH BASED SOLID-STATE DRIVES .” 2009. Thesis, Penn State University. Accessed March 04, 2021. https://submit-etda.libraries.psu.edu/catalog/10128.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kim, Youngjae. “DESIGN CHALLENGES ON ENTERPRISE-SCALE STORAGE SYSTEMS EMPLOYING HARD DRIVES AND NAND FLASH BASED SOLID-STATE DRIVES .” 2009. Web. 04 Mar 2021.

Vancouver:

Kim Y. DESIGN CHALLENGES ON ENTERPRISE-SCALE STORAGE SYSTEMS EMPLOYING HARD DRIVES AND NAND FLASH BASED SOLID-STATE DRIVES . [Internet] [Thesis]. Penn State University; 2009. [cited 2021 Mar 04]. Available from: https://submit-etda.libraries.psu.edu/catalog/10128.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kim Y. DESIGN CHALLENGES ON ENTERPRISE-SCALE STORAGE SYSTEMS EMPLOYING HARD DRIVES AND NAND FLASH BASED SOLID-STATE DRIVES . [Thesis]. Penn State University; 2009. Available from: https://submit-etda.libraries.psu.edu/catalog/10128

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Open Access Theses and Dissertations