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Rutgers University
1.
Ramrajkar, Samuel Noah, 1990-.
Inverter platform development for inverter paralleling.
Degree: MS, Electrical and Computer Engineering, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/47563/ 
► With the advent of distributed power generation and FACTs, inverter paralleling is an indispensible part of modern power systems. The problem of inverter paralleling poses…
(more)
▼ With the advent of distributed power generation and FACTs, inverter paralleling is an indispensible part of modern power systems. The problem of inverter paralleling poses a unique requirement of sharing the required total power from the connected inverters. The following report describes the research for development of an open platform for inverter paralleling. This includes development of hardware and software for an inverter which can be used as building block for the further research of control algorithms used in power flow control. In the wake of development of the platform, the project uses the novel "Direct Digital Synthesis" to generate the PWM signals. With a need for low cost inverter, the developed algorithm coupled with cost efficient circuit topology, provide the project with the needed cost effectiveness.
Advisors/Committee Members: Godrich, Hana (chair).
Subjects/Keywords: Electric circuits, Parallel; Electric inverters
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APA (6th Edition):
Ramrajkar, Samuel Noah, 1. (2015). Inverter platform development for inverter paralleling. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/47563/
Chicago Manual of Style (16th Edition):
Ramrajkar, Samuel Noah, 1990-. “Inverter platform development for inverter paralleling.” 2015. Masters Thesis, Rutgers University. Accessed March 08, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/47563/.
MLA Handbook (7th Edition):
Ramrajkar, Samuel Noah, 1990-. “Inverter platform development for inverter paralleling.” 2015. Web. 08 Mar 2021.
Vancouver:
Ramrajkar, Samuel Noah 1. Inverter platform development for inverter paralleling. [Internet] [Masters thesis]. Rutgers University; 2015. [cited 2021 Mar 08].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47563/.
Council of Science Editors:
Ramrajkar, Samuel Noah 1. Inverter platform development for inverter paralleling. [Masters Thesis]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47563/
Rutgers University
2.
Almansouri, Saif.
Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes.
Degree: MS, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/51186/
► In this thesis, complete decomposition of the Kalman filter into the reduced-order Kalman filter with slow and fast modes is addressed. First, we investigate the…
(more)
▼ In this thesis, complete decomposition of the Kalman filter into the reduced-order Kalman filter with slow and fast modes is addressed. First, we investigate the decomposition so that the slow and fast filters are completely separated with both of filters driven by the system measurements. The simulation results are presented for such a decomposition using an aircraft example. In the second part, this thesis presents the design of reduced order Kalman filters for systems with both slow and fast modes for the case of perfect measurement. The main advantage of the reduced order approach is moderating and reducing mathematical difficulties to obtain the optimal state estimation. This will facilitate the use of Kalman filter for a class of real-time physical systems. In this thesis, we explain the effectiveness of the proposed design through theoretical studies and simulation results.
Advisors/Committee Members: Gajic, Zoran (chair), Godrich, Hana (internal member), Orfanidis, Sophocles (internal member).
Subjects/Keywords: Kalman filtering
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APA (6th Edition):
Almansouri, S. (2016). Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/51186/
Chicago Manual of Style (16th Edition):
Almansouri, Saif. “Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes.” 2016. Masters Thesis, Rutgers University. Accessed March 08, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/51186/.
MLA Handbook (7th Edition):
Almansouri, Saif. “Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes.” 2016. Web. 08 Mar 2021.
Vancouver:
Almansouri S. Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes. [Internet] [Masters thesis]. Rutgers University; 2016. [cited 2021 Mar 08].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51186/.
Council of Science Editors:
Almansouri S. Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes. [Masters Thesis]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51186/
Rutgers University
3.
Bujaranpally, Krishnaveni, 1993-.
Design and implementation of the MobilityFirst protocol stack on an SDN platform using ipv6.
Degree: MS, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/51240/
► This thesis presents the design, implementation and evaluation of the MobilityFirst (MF) future internet architecture (FIA) on a Software Defined Network platform using IPv6 header…
(more)
▼ This thesis presents the design, implementation and evaluation of the MobilityFirst (MF) future internet architecture (FIA) on a Software Defined Network platform using IPv6 header fields. Some of the key features of the MobilityFirst architecture include unique identifiers (GUID) which separate naming from addressing, hop by hop transport protocol, in network storage and computation, global name resolution service (GNRS) which contains mappings of GUIDs to Network Addresses, a storage aware intra do- main routing protocol and an edge aware inter domain routing protocol. The prototype implementation has been done on an SDN platform using the Open source Floodlight controller and Open vSwitches supporting OpenFlow 1.3 protocol. The prototype en- capsulates all the aforementioned features of the MobilityFirst architecture. In order for the OpenFlow protocol to effectively handle MobilityFirst packets, the host stack of the MobilityFirst architecture has been modified to map the source and the destination GUID in the routing header to the source and the destination address fields of the IPv6 header of the packet. The controller then leverages this mapping to identify the source and destination and installs flow rules in the switches to route packets for hosts in the same domain without the help of GNRS. For the source and the destination in different domains, the controller obtains the network address of the destination network from the GNRS and uses the nSPs to identify the appropriate border router to forward packets. Additional modules have been added to the Floodlight controller to analyze and set up flow rules for the MobilityFirst packets and to communicate with the GNRS. In order to implement the in-network storage capability for an SDN an API has been devel- oped for the controller to interact with the storage device. The controller routes the chunks to the storage box when the destination is not reachable or when there is host mobility. The prototype has been evaluated for throughput and latency by conducting experiments on the ORBIT test bed. The processing time of the controller is in the order of few milliseconds and the throughput reaches 750 Mbps and 600 Mbps for 1 MB chunks when the source and the destination are in the same domain and different domains respectively. The latency introduced by the storage box depends on the time interval between the GNRS queries made by the controller and increases as the query interval increases.
Advisors/Committee Members: Raychaudhuri, Dipankar (chair), Godrich, Hana (internal member), Karimi, Naghmeh (internal member).
Subjects/Keywords: Software-defined networking (Computer network technology)
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APA (6th Edition):
Bujaranpally, Krishnaveni, 1. (2016). Design and implementation of the MobilityFirst protocol stack on an SDN platform using ipv6. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/51240/
Chicago Manual of Style (16th Edition):
Bujaranpally, Krishnaveni, 1993-. “Design and implementation of the MobilityFirst protocol stack on an SDN platform using ipv6.” 2016. Masters Thesis, Rutgers University. Accessed March 08, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/51240/.
MLA Handbook (7th Edition):
Bujaranpally, Krishnaveni, 1993-. “Design and implementation of the MobilityFirst protocol stack on an SDN platform using ipv6.” 2016. Web. 08 Mar 2021.
Vancouver:
Bujaranpally, Krishnaveni 1. Design and implementation of the MobilityFirst protocol stack on an SDN platform using ipv6. [Internet] [Masters thesis]. Rutgers University; 2016. [cited 2021 Mar 08].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51240/.
Council of Science Editors:
Bujaranpally, Krishnaveni 1. Design and implementation of the MobilityFirst protocol stack on an SDN platform using ipv6. [Masters Thesis]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51240/
Rutgers University
4.
Kolar, Sudarshan, 1990-.
Modeling, system analysis and control of a proton exchange membrane fuel cell.
Degree: MS, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/51334/
► This thesis presents a control technique for a 9th-order linearized Proton Exchange Membrane fuel cell model. This work starts with giving a brief introduction about…
(more)
▼ This thesis presents a control technique for a 9th-order linearized Proton Exchange Membrane fuel cell model. This work starts with giving a brief introduction about the construction and working of PEM fuel cell. Then, various fuel cell subsystems and their corresponding non-linear dynamical equations are presented. These equations are simulated to obtain steady state operating points of the model which is further used in Jacobian linearization. The linearized model consists of nine states as opposed to the eight states of the linearized model available in the literature. A pole placement controller is designed for the linearized model to obtain desired transient performance. This work concludes with inspiring the readers about some future works that can be carried out on this model.
Advisors/Committee Members: Gajic, Zoran (chair), Godrich, Hana (internal member), SURYAWANSHI, PRASHEEL (outside member).
Subjects/Keywords: Proton exchange membrane fuel cells
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APA (6th Edition):
Kolar, Sudarshan, 1. (2016). Modeling, system analysis and control of a proton exchange membrane fuel cell. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/51334/
Chicago Manual of Style (16th Edition):
Kolar, Sudarshan, 1990-. “Modeling, system analysis and control of a proton exchange membrane fuel cell.” 2016. Masters Thesis, Rutgers University. Accessed March 08, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/51334/.
MLA Handbook (7th Edition):
Kolar, Sudarshan, 1990-. “Modeling, system analysis and control of a proton exchange membrane fuel cell.” 2016. Web. 08 Mar 2021.
Vancouver:
Kolar, Sudarshan 1. Modeling, system analysis and control of a proton exchange membrane fuel cell. [Internet] [Masters thesis]. Rutgers University; 2016. [cited 2021 Mar 08].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51334/.
Council of Science Editors:
Kolar, Sudarshan 1. Modeling, system analysis and control of a proton exchange membrane fuel cell. [Masters Thesis]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51334/
Rutgers University
5.
Jabbar, Sadiq.
Antennas re-clustering and target handoff for multiple radars system.
Degree: MS, Electrical and Computer Engineering, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/52212/
► Widely distributed multiple radar systems have been shown to offer enhanced localization performance. With smaller radar footprint, the ability to employ larger number of transmit…
(more)
▼ Widely distributed multiple radar systems have been shown to offer enhanced localization performance. With smaller radar footprint, the ability to employ larger number of transmit and receive antennas opens new opportunities. In previous research, a subset selection scheme has been proposed for antenna clustering that minimizes the number of transmit and receive antennas required to achieve a preset accuracy performance. The study indicated that some transmit and receive antenna pairs contribute more than others to the localization performance. This thesis concentrates on handoff techniques that enable the transition of target tracking from one antenna cluster to another. As a target moves in an area covered by a grid of multiple radars, its relative position with respect to an existing tracking antenna cluster (or antenna subset) is changing, affecting the accuracy capabilities of the existing antenna cluster. Thus, at some point, there is a need to update the antenna cluster, keeping a useful antenna subset while replacing other antennas with ones that will keep localization accuracy within a given range. Re-clustering methods are proposed to address target handoff within antennas belonging to a larger grid. Low complexity re-clustering algorithms are proposed for handoff purposes which enable a constrained replacement of antennas. These fast approximation algorithms are based on the optimization of the Cramer Rao bound (CRB) and constrained by the number of antennas that may be replaced at any given time. It is shown that this method performs close to optimal and can be implemented in a decentralized fashion.
Advisors/Committee Members: Godrich, Hana (chair), Gajic, Zoran (internal member), Caggiano, Michael (internal member).
Subjects/Keywords: Radar – Antennas; Antenna arrays
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APA (6th Edition):
Jabbar, S. (2017). Antennas re-clustering and target handoff for multiple radars system. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/52212/
Chicago Manual of Style (16th Edition):
Jabbar, Sadiq. “Antennas re-clustering and target handoff for multiple radars system.” 2017. Masters Thesis, Rutgers University. Accessed March 08, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/52212/.
MLA Handbook (7th Edition):
Jabbar, Sadiq. “Antennas re-clustering and target handoff for multiple radars system.” 2017. Web. 08 Mar 2021.
Vancouver:
Jabbar S. Antennas re-clustering and target handoff for multiple radars system. [Internet] [Masters thesis]. Rutgers University; 2017. [cited 2021 Mar 08].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/52212/.
Council of Science Editors:
Jabbar S. Antennas re-clustering and target handoff for multiple radars system. [Masters Thesis]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/52212/
Rutgers University
6.
Hegde, Saket, 1991-.
Faces in places: an exploratory methodology for measuring fine-grained diversity via social media images.
Degree: MS, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/51305/
► In this study, we explore a novel approach to measure fine-grained (photo-level) diversity using Instagram. We compare and contrast these new measures of diversity with…
(more)
▼ In this study, we explore a novel approach to measure fine-grained (photo-level) diversity using Instagram. We compare and contrast these new measures of diversity with traditional metrics (i.e. census). We discuss the merits and shortcomings of supplementing traditional census figures with these new measures. Further, we explore the predictive capacity that this new metric has over socio economic outcomes, namely income inequality. We find that using our ne-grained metric for measuring diversity in interactions produces very different results compared to traditional census measures. We also determine that diversity (specifically photo based entropy in age and race) are associated with income inequality and the combined model is significantly (though weakly) predictive of inequality. Neighborhoods that have high scores in racial diversity seem to have a correlation with lower inequality, while neighborhoods that have high scores in age diversity seem to have a correlation with higher inequality. We discuss the possible implications of this work on research in sociology and associated areas and suggest further work based on these findings.
Advisors/Committee Members: Singh, Vivek K (chair), Godrich, Hana (co-chair), Jha, Shantenu (co-chair).
Subjects/Keywords: Multiculturalism; Social media
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APA (6th Edition):
Hegde, Saket, 1. (2016). Faces in places: an exploratory methodology for measuring fine-grained diversity via social media images. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/51305/
Chicago Manual of Style (16th Edition):
Hegde, Saket, 1991-. “Faces in places: an exploratory methodology for measuring fine-grained diversity via social media images.” 2016. Masters Thesis, Rutgers University. Accessed March 08, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/51305/.
MLA Handbook (7th Edition):
Hegde, Saket, 1991-. “Faces in places: an exploratory methodology for measuring fine-grained diversity via social media images.” 2016. Web. 08 Mar 2021.
Vancouver:
Hegde, Saket 1. Faces in places: an exploratory methodology for measuring fine-grained diversity via social media images. [Internet] [Masters thesis]. Rutgers University; 2016. [cited 2021 Mar 08].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51305/.
Council of Science Editors:
Hegde, Saket 1. Faces in places: an exploratory methodology for measuring fine-grained diversity via social media images. [Masters Thesis]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51305/
Rutgers University
7.
Parthasarathy, Ramyaa, 1992-.
Modeling and assessment of energy management challenges for distributed wind farms.
Degree: MS, Electrical and Computer Engineering, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/55605/
► The advent of deregulation of electricity to meet the increasing load demands and the call for more efficient sustainable energy practices have dominantly amplified the…
(more)
▼ The advent of deregulation of electricity to meet the increasing load demands and the call for more efficient sustainable energy practices have dominantly amplified the need for incorporation of renewable energy systems in today’s power networks. Wind energy systems can be a leading source of renewable energy with adequate exploration into the uncertainty surrounding its dependency on climatic changes. The aim of the thesis is to analyze the potential of energy savings through the inclusion of wind energy in the already existing network. Wind, in conjunction with the conventional power generators, needs to meet the continuously varying load demand while considering the technical real-time constraints imposed by the system. The output from conventional generators is deterministic while in the case of wind, due to its stochastic nature, the output is intermittent. This is modeled by Weibull probability distribution function due to its discontinuous behavior. The first step involved in planning and operating the power system with a wind farm, is providing a load flow solution. Among various techniques, Newton-Raphson is one of the most widely used methods to calculate the total generation and line losses involved in transmission. The next step is to use the load flow solution to optimize the economic dispatch of the real power in the system. The optimal allocation of the generated power among conventional and wind units are based on the operating cost of the units and the cost of wind power. The cost of wind units accounts for various scenarios such as the penalty cost due to overestimation and underestimation of wind power and the direct cost pertaining to the issue of ownership of the wind generators. The research involved in this thesis provides a novel model for power system operation combining conventional and renewable energy along with remote energy storage systems, which are validated effectively for the proposed system. Furthermore, with the help of the Newton-Raphson load flow technique followed by economic dispatch, an efficient and economical solution is provided to determine the optimal output at the lowest cost while keeping the transmission and other operational constraints in check.
Advisors/Committee Members: Godrich, Hana (chair), Gajic, Zoran (internal member), Caggiano, Michael (internal member), School of Graduate Studies.
Subjects/Keywords: Wind power; Wind power plants – Design and construction
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APA (6th Edition):
Parthasarathy, Ramyaa, 1. (2017). Modeling and assessment of energy management challenges for distributed wind farms. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/55605/
Chicago Manual of Style (16th Edition):
Parthasarathy, Ramyaa, 1992-. “Modeling and assessment of energy management challenges for distributed wind farms.” 2017. Masters Thesis, Rutgers University. Accessed March 08, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/55605/.
MLA Handbook (7th Edition):
Parthasarathy, Ramyaa, 1992-. “Modeling and assessment of energy management challenges for distributed wind farms.” 2017. Web. 08 Mar 2021.
Vancouver:
Parthasarathy, Ramyaa 1. Modeling and assessment of energy management challenges for distributed wind farms. [Internet] [Masters thesis]. Rutgers University; 2017. [cited 2021 Mar 08].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55605/.
Council of Science Editors:
Parthasarathy, Ramyaa 1. Modeling and assessment of energy management challenges for distributed wind farms. [Masters Thesis]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55605/
Rutgers University
8.
Kodra, Kliti.
New control methods for multi-time-scale linear systems with smart grid applications.
Degree: PhD, Electrical and Computer Engineering, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/53649/
► Power systems within smart grid architectures are generally large scale and have a tendency to exhibit multiple time-scales when modeled in their entirety due to…
(more)
▼ Power systems within smart grid architectures are generally large scale and have a tendency to exhibit multiple time-scales when modeled in their entirety due to the presence of physical components of different nature and parasitic parameters associated with them. Research in current literature primarily focuses on studying power system architectures based on a two time-scale decomposition. In this dissertation, we use singular perturbation theory to investigate time-scale decomposition and related anomalies and propose new control methods by considering the presence of multiple time-scales. We start with an open-loop study of a simplified model of an islanded microgrid in singularly perturbed form with highly oscillatory and highly damped modes. Simulation results and analytical analysis conclude that the model does not contain any slow time-scales even though the eigenvalue distribution of the model tells otherwise. While the singular perturbation parameter is very small, the classical two time-scale decomposition in this case is not effective. On the other hand, the modes corresponding to the fastest time-scales provide a very accurate approximation of the original model. The results obtained via singular perturbation methods are also corroborated by using the balancing realization technique. Namely, only the states corresponding to the fastest modes are dominant. Motivated by the structure of the state-space input matrix of the previous problem, we consider a new class of singularly perturbed systems where individual inputs control slow and fast modes independently. We study the linear quadratic regulator optimal control problem for three cases that are common in real physical systems, namely when the inputs are completely decoupled or independent, when weak coupling is present between the inputs, and when the fast subsystem is weakly controlled. We obtain the zero-order approximation solution of the continuous algebraic Riccati equations for each case in terms of simplified sub-problems which avoid possible ill-conditioning. As a follow-up, parallel recursive algorithms based on fixed-point methods are proposed to improve the error of the approximations leading to the accurate solution of Riccati equations and the cost functional in a few iterations of the algorithm. These results are further extended to the stochastic case. The linear-quadratic Gaussian control problem is investigated and its solution is also obtained very accurately in an iterative fashion. Lastly, implicit singularly perturbed systems with multiple time-scales are considered. The Schur decomposition is utilized to transform the control matrix into an upper quasi-triangular form where the time-scales are explicitly ordered and a singularly perturbed model is obtained after perturbation parameters are evaluated and extracted. The standard multi-time-scale system is then decoupled into individual time-scales by sequentially applying an invariant transformation. Multi-time-scale control of the Schur-decomposed system is then considered.…
Advisors/Committee Members: Gajic, Zoran (chair), Godrich, Hana (internal member), Pompili, Dario (internal member), Yi, Jingang (internal member), Zhong, Ningfan (outside member).
Subjects/Keywords: Smart power grids
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APA (6th Edition):
Kodra, K. (2017). New control methods for multi-time-scale linear systems with smart grid applications. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/53649/
Chicago Manual of Style (16th Edition):
Kodra, Kliti. “New control methods for multi-time-scale linear systems with smart grid applications.” 2017. Doctoral Dissertation, Rutgers University. Accessed March 08, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/53649/.
MLA Handbook (7th Edition):
Kodra, Kliti. “New control methods for multi-time-scale linear systems with smart grid applications.” 2017. Web. 08 Mar 2021.
Vancouver:
Kodra K. New control methods for multi-time-scale linear systems with smart grid applications. [Internet] [Doctoral dissertation]. Rutgers University; 2017. [cited 2021 Mar 08].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/53649/.
Council of Science Editors:
Kodra K. New control methods for multi-time-scale linear systems with smart grid applications. [Doctoral Dissertation]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/53649/
Rutgers University
9.
Etigowni, Sriharsha, 1989-.
Securing safety-critical systems using physical and control invariants.
Degree: PhD, Electrical and Computer Engineering, 2020, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/62930/
► The critical infrastructures such as electrical power systems, telecommunication, transportation systems, and safety systems in vehicles and avionics comprise some critical safety systems. Safety critical…
(more)
▼ The critical infrastructures such as electrical power systems, telecommunication, transportation systems, and safety systems in vehicles and avionics comprise some critical safety systems. Safety critical systems use real-time control, including the software used in the design of physical systems and structures, whose failure can have a life-threatening impact. Failure or malfunctioning of such systems will lead to damage to the equipment/property, cause serious injuries or death to people. Since the safety-critical systems use embedded systems running software on them, they are prone to kinetic cyber attacks. Kinetic cyber attacks are a class of cyber attacks that can cause physical damage, injury or death solely through the exploitation of vulnerabilities on the systems. Most of the safety-critical systems are cyber-physical systems. The main targets of kinetic cyber attacks are cyber-physical systems due to there tight coordination between the computational and physical systems.
This thesis provides security solutions using both the cyber as well as physical space together which are tailored for cyber-physical systems. This thesis provides cyber-physical security assessments and solutions by considering the interdependencies between cyber and physical worlds. We leverage the physical and control invariants for security assessment, control flow monitoring and verification purposes at different levels of abstraction in safety-critical systems. The physical invariants of a cyber-physical system is the laws of physics which will not change and the control invariants are the control algorithm which do not change during there operations. Some of the physical and control invariants used in this thesis for securing critical systems are electromagnetic emanation due to noise in digital circuits, flight dynamics for UAV’s and power flow equations, swing equations for the electrical power system.
First, we introduce a novel approach to vulnerability assessment in critical infrastructures by cyber-physical interdependency. We provide an attack synthesis method for power grids, which is analogous to the penetration testing in cybersecurity. Second, to prevent attacks against the control logic used in controllers, we provide a runtime verification solution by leveraging the physical and control invariants of the system. Control logic is a part of a software program that controls the operations of the program. The number of states that a system can be is represented by state variables. The system state space is the set of possible configurations of the system. The state space increases exponentially with the increase in state variables. The proposed verification technique can solve problems such as state space explosion when used on cyber-physical systems. The above-mentioned control logic verification technique has short-come in detecting firmware level malware such as physics aware rootkits. Hence, we provide a separate solution of contactless side channel control flow monitoring technique by receiving the electromagnetic…
Advisors/Committee Members: Zonouz, Saman (chair), Godrich, Hana (internal member), Pompili, Dario (internal member), Beyah, Raheem (outside member), School of Graduate Studies.
Subjects/Keywords: Cooperating objects (Computer systems) – Security measures
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APA (6th Edition):
Etigowni, Sriharsha, 1. (2020). Securing safety-critical systems using physical and control invariants. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/62930/
Chicago Manual of Style (16th Edition):
Etigowni, Sriharsha, 1989-. “Securing safety-critical systems using physical and control invariants.” 2020. Doctoral Dissertation, Rutgers University. Accessed March 08, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/62930/.
MLA Handbook (7th Edition):
Etigowni, Sriharsha, 1989-. “Securing safety-critical systems using physical and control invariants.” 2020. Web. 08 Mar 2021.
Vancouver:
Etigowni, Sriharsha 1. Securing safety-critical systems using physical and control invariants. [Internet] [Doctoral dissertation]. Rutgers University; 2020. [cited 2021 Mar 08].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62930/.
Council of Science Editors:
Etigowni, Sriharsha 1. Securing safety-critical systems using physical and control invariants. [Doctoral Dissertation]. Rutgers University; 2020. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62930/
Rutgers University
10.
Sanam, Tahsina Farah.
A channel state information based device free indoor localization for context aware computing: a machine learning approach.
Degree: PhD, Indoor localization, 2020, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/64189/
► Learning important human contextual information is one of the fundamental features to establish a smart home environment. Location information is one of the important ingredients…
(more)
▼ Learning important human contextual information is one of the fundamental features to establish a smart home environment. Location information is one of the important ingredients for many context-aware applications where the system requires to localize targets in an indoor setting. Most existing work, however, acquires contextual information in an obtrusive manner – they may require subjects to carry mobile devices, or rely on self or peer report to report data. As an emerging technique, device-free localization (DFL) is promising to localize the target without attaching any transceivers. Specifically, wireless sensing based device free localization is getting increased attention due to its ability to potentially support a broad array of applications including elder care, well-being management, and latchkey child safety, etc. In this work, we investigate the device free, unobtrusive approach for indoor localization using channel state information (CSI) leveraging machine learning techniques. In particular, our work mainly focuses on developing a multiple target localization system in a device free setting by formulating the localization problem as a machine learning based location/spot classification problem in order to achieve a robust, low cost, yet highly accurate localization system.
Multiple machine learning techniques have been explored in this work that can help us to learn human location at indoors by analyzing the location specific feature pattern of channel state information. First,
we designed MaLDIP, a support vector machine (SVM) algorithm framework to localize a single target through supervised classification problem. The system works by utilizing frequency diversity and spatial diversity properties of CSI at target location by correlating the impact of human presence to certain changes on the received signal features. However, accurate modeling of the effect of a subject on fine grained CSI is challenging due to the presence of multipaths. We propose a novel subcarrier selection method to remove the multipath affected subcarriers to improve the performance of localization. Finally, we select the most location-dependent features from channel response based upon the wireless propagation model for SVM based classification approach. The proposed approach results in much higher accuracy compared to the state-of-the-art localization approaches.
Second, we present a discriminant learning approach for two different indoor localization systems using CSI amplitude and phases difference between receiver antennas, respectively. We investigate a Canonical Correlation Analysis based feature fusion technique using only CSI amplitude features in order to incorporate discriminative features of CSIs for localization. We further improved the performance by exploiting multi-view learning approach in the training stage to utilize diversity from different AP's (view) CSI data. Moreover, in order to exploit the complete wireless propagation features, we utilize bi-modal features of CSI in terms of both amplitude and…
Advisors/Committee Members: Godrich, Hana (chair), Soljanin, Emina (internal member), Chen, Yingying (internal member), Haimovich, Alexander (outside member), School of Graduate Studies.
Subjects/Keywords: Electrical and Computer Engineering
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APA (6th Edition):
Sanam, T. F. (2020). A channel state information based device free indoor localization for context aware computing: a machine learning approach. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/64189/
Chicago Manual of Style (16th Edition):
Sanam, Tahsina Farah. “A channel state information based device free indoor localization for context aware computing: a machine learning approach.” 2020. Doctoral Dissertation, Rutgers University. Accessed March 08, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/64189/.
MLA Handbook (7th Edition):
Sanam, Tahsina Farah. “A channel state information based device free indoor localization for context aware computing: a machine learning approach.” 2020. Web. 08 Mar 2021.
Vancouver:
Sanam TF. A channel state information based device free indoor localization for context aware computing: a machine learning approach. [Internet] [Doctoral dissertation]. Rutgers University; 2020. [cited 2021 Mar 08].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/64189/.
Council of Science Editors:
Sanam TF. A channel state information based device free indoor localization for context aware computing: a machine learning approach. [Doctoral Dissertation]. Rutgers University; 2020. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/64189/
. 
Open Access Theses and Dissertations