You searched for subject:(criticality).
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1.
Shi, Yiwen.
Fault Criticality Analysis and Test Optimization Methods for
Enhanced Detection of Critical Faults and Defects in Digital
Integrated Circuits.
Degree: PhD, Electrical Science and Computer
Engineering, 2011, Brown University
URL: https://repository.library.brown.edu/studio/item/bdr:11311/ 
► Defective part levels of zero are almost impossible to achieve in an era of complex defects and process variations. It is important to ensure that…
(more)
▼ Defective part levels of zero are almost impossible to
achieve in an era of complex defects and process variations. It is
important to ensure that any defects missed during test impact the
end user as little as possible. In particular, when testing
resources are severely limited, special attention should be paid to
critical faults so that important or frequent field failures
arising from test escapes can be minimized. Reducing the
criticality of test escapes requires 1) a means of estimating the
criticality of different potential faults and 2) a method for
optimizing test sets based upon the obtained
criticality estimates.
In this dissertation, we first present a method to efficiently
estimate fault
criticality under realistic usage conditions using a
translation between combinational and sequential fault analysis.
Using the resulting criticalities, we then propose a test set
quality model to evaluate the ability of test patterns to detect
the most critical defects. We develop two algorithms that use this
test quality model to optimize test sets. Unlike previous
approaches that considered
criticality during test for the purpose
of increasing yields, we focus on effectively utilizing scarce
testing resources to reduce the
criticality of test escapes without
purposefully allowing defects to pass. We will show that both
proposed algorithms can dramatically reduce the
criticality of test
escapes. Finally, motivated by the idea of focusing limited testing
resources on faults that are likely to cause failures in field, we
next propose the insertion of hardware monitors into a design to
dynamically estimate the
criticality of potential faults.
Specifically, we propose a new type of hardware monitor for the
probabilistic determination of how many times each fault was likely
to have been covered during program execution. The estimated
detection counts have many potential uses�including the rating of
functional test sequences and the identification of which faults
are most critical for the applications a user is actually running.
Furthermore, in a multi-core environment, the resulting
criticality
estimates could be used to generate field-based test sets that
concentrate on those areas of the design that are most critical to
user applications.
Advisors/Committee Members: Dworak, Jennifer (Director), Bahar, Ruth (Reader), Reda, Sherief (Reader).
Subjects/Keywords: fault criticality
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APA (6th Edition):
Shi, Y. (2011). Fault Criticality Analysis and Test Optimization Methods for
Enhanced Detection of Critical Faults and Defects in Digital
Integrated Circuits. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:11311/
Chicago Manual of Style (16th Edition):
Shi, Yiwen. “Fault Criticality Analysis and Test Optimization Methods for
Enhanced Detection of Critical Faults and Defects in Digital
Integrated Circuits.” 2011. Doctoral Dissertation, Brown University. Accessed February 29, 2020.
https://repository.library.brown.edu/studio/item/bdr:11311/.
MLA Handbook (7th Edition):
Shi, Yiwen. “Fault Criticality Analysis and Test Optimization Methods for
Enhanced Detection of Critical Faults and Defects in Digital
Integrated Circuits.” 2011. Web. 29 Feb 2020.
Vancouver:
Shi Y. Fault Criticality Analysis and Test Optimization Methods for
Enhanced Detection of Critical Faults and Defects in Digital
Integrated Circuits. [Internet] [Doctoral dissertation]. Brown University; 2011. [cited 2020 Feb 29].
Available from: https://repository.library.brown.edu/studio/item/bdr:11311/.
Council of Science Editors:
Shi Y. Fault Criticality Analysis and Test Optimization Methods for
Enhanced Detection of Critical Faults and Defects in Digital
Integrated Circuits. [Doctoral Dissertation]. Brown University; 2011. Available from: https://repository.library.brown.edu/studio/item/bdr:11311/
Delft University of Technology
2.
Narayana, S.
Orchestrating Mixed-Criticality Melody: Reconciling Energy with Safety for Mixed-Criticality Embedded Real-Time Systems:.
Degree: 2015, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:015312bf-905c-439a-a511-8b6f721888a5
► Embedded systems are getting into various domains of our daily life as well as in many of the highly sophisticated large systems, such as air…
(more)
▼ Embedded systems are getting into various domains of our daily life as well as in many of the highly sophisticated large systems, such as air planes, military tanks, rockets, satellites. These large systems consist of many modules which are executing umpteen number of tasks semi-independently. However, not all tasks have the same levels of priority and/or
criticality. One way is to design individual systems with dedicated processors to avoid the dependency as proposed by the industry. However, mixed-
criticality notion helps to enhance system performance, and reduce system cost, size, and weight. The idea is to integrate functionalities of different safety
criticality levels into a common computing platform. Further, the energy consumption of these systems should also be taken into account. While there are many algorithms under the broad umbrella of scheduling - preemptive, non-preemptive, etc., – solutions that jointly minimizes both static and dynamic energy consumption in mixed-
criticality systems on multi-cores under partitioned scheduling are, hitherto, not addressed in depth.
To reconcile the conflicting requirements of safety and energy: (i) we formulate a general energy minimization problem; (ii) we provide an analytical optimal solution on unicore systems and a corresponding low-complexity heuristic and (iii) we provide energy-aware mapping techniques based on our unicore solutions on multi-cores. Effectiveness in energy reduction is demonstrated for our solutions through extensive simulations with synthetic task sets.
Advisors/Committee Members: Venkatesha Prasad, R., Thiele, L..
Subjects/Keywords: mixed-criticality; criticality; energy minimization; multi-core
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APA (6th Edition):
Narayana, S. (2015). Orchestrating Mixed-Criticality Melody: Reconciling Energy with Safety for Mixed-Criticality Embedded Real-Time Systems:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:015312bf-905c-439a-a511-8b6f721888a5
Chicago Manual of Style (16th Edition):
Narayana, S. “Orchestrating Mixed-Criticality Melody: Reconciling Energy with Safety for Mixed-Criticality Embedded Real-Time Systems:.” 2015. Masters Thesis, Delft University of Technology. Accessed February 29, 2020.
http://resolver.tudelft.nl/uuid:015312bf-905c-439a-a511-8b6f721888a5.
MLA Handbook (7th Edition):
Narayana, S. “Orchestrating Mixed-Criticality Melody: Reconciling Energy with Safety for Mixed-Criticality Embedded Real-Time Systems:.” 2015. Web. 29 Feb 2020.
Vancouver:
Narayana S. Orchestrating Mixed-Criticality Melody: Reconciling Energy with Safety for Mixed-Criticality Embedded Real-Time Systems:. [Internet] [Masters thesis]. Delft University of Technology; 2015. [cited 2020 Feb 29].
Available from: http://resolver.tudelft.nl/uuid:015312bf-905c-439a-a511-8b6f721888a5.
Council of Science Editors:
Narayana S. Orchestrating Mixed-Criticality Melody: Reconciling Energy with Safety for Mixed-Criticality Embedded Real-Time Systems:. [Masters Thesis]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:015312bf-905c-439a-a511-8b6f721888a5
University of Alberta
3.
Ogilvie, Gregory S.
Gaging The Transformative Potential of Second Language
Education: Language Educators' Understanding of Interculturality
and Criticality.
Degree: PhD, Department of Secondary Education, 2016, University of Alberta
URL: https://era.library.ualberta.ca/files/csx61dm28m
► Second language education is well suited to promote transformative outcomes due to its unique character (the importance of both declarative and procedural knowledge), the close…
(more)
▼ Second language education is well suited to promote
transformative outcomes due to its unique character (the importance
of both declarative and procedural knowledge), the close connection
between language and culture, and the entrenched humanistic
tradition within the field (Musumeci, 1997; Guilherme, 2002).
Nonetheless, second language pedagogy is commonly portrayed as
having an exclusive linguistic focus, as evidenced by the professed
professional knowledge base of second language educators (e.g.,
Freeman & Johnson, 1998; Johnston & Goettsch, 2000;
Andrews, 2003; Liddicoat, 2006; Mullock, 2006). This study sought
to explore the transformative potential of second language
education by investigating how professional second language
educators understand ‘criticality’ and ‘interculturality’ – two
complex, heterogeneously defined concepts that have received
increased attention in the field and have a significant impact on
how pedagogy is enacted. As the primary unit of inquiry was
understanding, an interpretive approach was adopted grounded in
post-formal thinking, Gadamerian hermeneutics, and critical
pedagogy. Data for the study was collected from ten highly
educated, dedicated second language instructors with experience
teaching in higher education institutions. Data was collected in
the form of extensive interviews and the analysis of resources
deemed important in guiding instruction. The results of the
hermeneutic investigation demonstrated that the educators defined
the function of second language education and the central concepts
of the study (criticality and interculturality) in diverse ways.
The varied conceptualizations illuminated different aspects of
criticality and interculturality and their influence on pedagogy
from a practitioner perspective. Moreover, they revealed that all
the educators conceptualized second language education as a
transformative act, but to differing degrees and with different
foci. Among the central factors influencing the transformative
potential of second language pedagogy were the domains in which
criticality was applied. Although all of the educators applied
criticality to information introduced in the classroom (in relation
to the source, validity, etc. of information), only some of the
educators applied criticality to the domains of the subject,
content introduced, pedagogical practices and epistemology, thus
greatly influencing the transformative potential of instruction.
The results of the study also revealed the presence of discourses
that had an inhibitory effect on second language education as a
transformative endeavour. These included the discourse of political
correctness, the discourse of narrow instrumentality, and the
discourse of decisive deference. The discourses demonstrate how the
trends towards standardization and de-professionalization rampant
within the field of education have had an adverse impact on how
second language educators understand their role in the pedagogical
process and enact pedagogy.
Subjects/Keywords: interculturality; transformative education; criticality
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APA (6th Edition):
Ogilvie, G. S. (2016). Gaging The Transformative Potential of Second Language
Education: Language Educators' Understanding of Interculturality
and Criticality. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/csx61dm28m
Chicago Manual of Style (16th Edition):
Ogilvie, Gregory S. “Gaging The Transformative Potential of Second Language
Education: Language Educators' Understanding of Interculturality
and Criticality.” 2016. Doctoral Dissertation, University of Alberta. Accessed February 29, 2020.
https://era.library.ualberta.ca/files/csx61dm28m.
MLA Handbook (7th Edition):
Ogilvie, Gregory S. “Gaging The Transformative Potential of Second Language
Education: Language Educators' Understanding of Interculturality
and Criticality.” 2016. Web. 29 Feb 2020.
Vancouver:
Ogilvie GS. Gaging The Transformative Potential of Second Language
Education: Language Educators' Understanding of Interculturality
and Criticality. [Internet] [Doctoral dissertation]. University of Alberta; 2016. [cited 2020 Feb 29].
Available from: https://era.library.ualberta.ca/files/csx61dm28m.
Council of Science Editors:
Ogilvie GS. Gaging The Transformative Potential of Second Language
Education: Language Educators' Understanding of Interculturality
and Criticality. [Doctoral Dissertation]. University of Alberta; 2016. Available from: https://era.library.ualberta.ca/files/csx61dm28m
Penn State University
4.
Gill, Daniel Fury.
Newton-Krylov Methods for the Solution of the k-Eigenvalue
Problem in Multigroup Neutronics Calculations.
Degree: PhD, Nuclear Engineering, 2009, Penn State University
URL: https://etda.libraries.psu.edu/catalog/10162
► In this work we propose using Newton's method, specifically the inexact Newton-GMRES formulation, to solve the k-eigenvalue problem in both transport and diffusion neutronics problems.…
(more)
▼ In this work we propose using Newton's method,
specifically the inexact Newton-GMRES formulation, to solve the
k-eigenvalue problem in both transport and diffusion neutronics
problems. This is achieved by choosing a nonlinear function whose
roots are the eigenpairs of the k-eigenvalue calculation and then
using Newton's method to solve the nonlinear system. The
flexibility resulting from the use of a Krylov subspace method to
solve the linear Newton step can be further extended via the use of
the Jacobian-Free Newton-Krylov (JFNK) approximation, which
requires no knowledge of the system's Jacobian; instead only the
ability to evaluate the system residual is necessary. This makes it
possible to avoid the computational and memory costs associated
with the construction and storage of the Jacobian, resulting in an
efficient solution algorithm. Writing the k-eigenvalue problem as a
nonlinear function yields a number of formulations, all of which
all have the desired roots. For the diffusion approximation, the
nonlinear function is written in the form of the generalized
eigenvalue problem and a set of preconditioners is developed and
applied to the GMRES iterations that are used to solve the
linearized Newton problem. Most of the developed methods can be
implemented as either Newton-Krylov (NK) methods, where the
Jacobian-vector product is formed using the explicitly constructed
Jacobian, or via the JFNK approximation, where a finite-difference
perturbation is used to approximate the Jacobian-vector product.
One particularly effective preconditioning option comprises the use
of the standard power iteration to precondition the GMRES iteration
on either the right or the left. Preconditioning on the left,
denoted JFNK(PI), results in a modified nonlinear system whose
implementation only requires the ability to perform a single
traditional outer iteration, making this approach relatively simple
to wrap around an existing diffusion theory k-eigenvalue problem
solver. Other preconditioning options, such as the Incomplete
Cholesky decomposition of the within-group diffusion matrix, are
also considered. Similar methods were developed for transport
theory, cast using an operator notation that greatly simplifies
their presentation. All of the nonlinear functions developed are
written in terms of a generic fixed-point iteration, with a number
of specific fixed-point formulations considered. Each fixed-point
scheme represents a viable k-eigenvalue problem solution method,
with two of the techniques corresponding to traditionally used
iterative schemes. The new methods developed can also be wrapped
around existing software in most instances, simplifying the
implementation process. Ultimately it is seen that the most
effective of the Newton formulations in transport theory is wrapped
around a k-eigenvalue formulation that is a very special instance
of traditional methods: no upscattering iterations are performed,
only one inner iteration completed per outer, using source
iteration with the previous outer iterate as the initial guess.…
Subjects/Keywords: JFNK; Criticality; Neutron transport; eigenvalue
Record Details
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APA ·
Chicago ·
MLA ·
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CSE |
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gill, D. F. (2009). Newton-Krylov Methods for the Solution of the k-Eigenvalue
Problem in Multigroup Neutronics Calculations. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/10162
Chicago Manual of Style (16th Edition):
Gill, Daniel Fury. “Newton-Krylov Methods for the Solution of the k-Eigenvalue
Problem in Multigroup Neutronics Calculations.” 2009. Doctoral Dissertation, Penn State University. Accessed February 29, 2020.
https://etda.libraries.psu.edu/catalog/10162.
MLA Handbook (7th Edition):
Gill, Daniel Fury. “Newton-Krylov Methods for the Solution of the k-Eigenvalue
Problem in Multigroup Neutronics Calculations.” 2009. Web. 29 Feb 2020.
Vancouver:
Gill DF. Newton-Krylov Methods for the Solution of the k-Eigenvalue
Problem in Multigroup Neutronics Calculations. [Internet] [Doctoral dissertation]. Penn State University; 2009. [cited 2020 Feb 29].
Available from: https://etda.libraries.psu.edu/catalog/10162.
Council of Science Editors:
Gill DF. Newton-Krylov Methods for the Solution of the k-Eigenvalue
Problem in Multigroup Neutronics Calculations. [Doctoral Dissertation]. Penn State University; 2009. Available from: https://etda.libraries.psu.edu/catalog/10162
McMaster University
5.
Lunts, Peter.
Low Energy Properties of the Antiferromagnetic Quantum Critical Metal in Two Dimensions.
Degree: PhD, 2017, McMaster University
URL: http://hdl.handle.net/11375/22075
► In this thesis, we study the low-energy effective theory for the antiferromagnetic quantum critical metal in two dimensions. The theory has been the subject of…
(more)
▼ In this thesis, we study the low-energy effective theory for the antiferromagnetic quantum
critical metal in two dimensions. The theory has been the subject of intense study for more than
twenty years, due to the novel physics of non-Fermi liquid metals and its potential relevance to
high-temperature superconductors and heavy-fermion compounds.
In the first part of the thesis, we present the perturbative study of the theory in 3 minus epsilon space dimensions by extending the earlier one-loop analysis to higher-loop orders. We show that the expansion is not organized by the standard loop expansion, and a two-loop graph becomes as important as one-loop graphs even in the small epsilon limit due to an infrared singularity caused by an emergent quasilocality. This qualitatively changes the nature of the infrared fixed point, and the epsilon expansion is controlled only after the two-loop effect is taken into account. Furthermore, we show that a ratio between velocities emerges as a small parameter, which suppresses a large class of diagrams. We show that the critical exponents do not receive quantum corrections beyond the linear order in epsilon in the limit that the ratio of velocities vanishes.
In the second part of the thesis, we present a nonperturbative solution to the theory in two
dimensions based on an ansatz that is inspired by the perturbative analysis. Being a strongly
coupled theory, it can still be solved reliably in the low-energy limit as quantum fluctuations are
organized by the ratio of velocities that dynamically flows to zero in the low-energy limit. We
predict the exact critical exponents that govern the universal scaling of physical observables at
low temperatures.
Thesis
Doctor of Philosophy (PhD)
Advisors/Committee Members: Lee, Sung-Sik, Physics and Astronomy.
Subjects/Keywords: Quantum Criticality; Non-Fermi liquids
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APA (6th Edition):
Lunts, P. (2017). Low Energy Properties of the Antiferromagnetic Quantum Critical Metal in Two Dimensions. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/22075
Chicago Manual of Style (16th Edition):
Lunts, Peter. “Low Energy Properties of the Antiferromagnetic Quantum Critical Metal in Two Dimensions.” 2017. Doctoral Dissertation, McMaster University. Accessed February 29, 2020.
http://hdl.handle.net/11375/22075.
MLA Handbook (7th Edition):
Lunts, Peter. “Low Energy Properties of the Antiferromagnetic Quantum Critical Metal in Two Dimensions.” 2017. Web. 29 Feb 2020.
Vancouver:
Lunts P. Low Energy Properties of the Antiferromagnetic Quantum Critical Metal in Two Dimensions. [Internet] [Doctoral dissertation]. McMaster University; 2017. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/11375/22075.
Council of Science Editors:
Lunts P. Low Energy Properties of the Antiferromagnetic Quantum Critical Metal in Two Dimensions. [Doctoral Dissertation]. McMaster University; 2017. Available from: http://hdl.handle.net/11375/22075
Delft University of Technology
6.
Moerland-Masic, I.
Materials criticality in the Netherlands - response from the technological industry:.
Degree: 2012, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:6e5896cf-05e1-4582-9b59-3a009b629a88
Subjects/Keywords: materials; criticality
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APA ·
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APA (6th Edition):
Moerland-Masic, I. (2012). Materials criticality in the Netherlands - response from the technological industry:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:6e5896cf-05e1-4582-9b59-3a009b629a88
Chicago Manual of Style (16th Edition):
Moerland-Masic, I. “Materials criticality in the Netherlands - response from the technological industry:.” 2012. Masters Thesis, Delft University of Technology. Accessed February 29, 2020.
http://resolver.tudelft.nl/uuid:6e5896cf-05e1-4582-9b59-3a009b629a88.
MLA Handbook (7th Edition):
Moerland-Masic, I. “Materials criticality in the Netherlands - response from the technological industry:.” 2012. Web. 29 Feb 2020.
Vancouver:
Moerland-Masic I. Materials criticality in the Netherlands - response from the technological industry:. [Internet] [Masters thesis]. Delft University of Technology; 2012. [cited 2020 Feb 29].
Available from: http://resolver.tudelft.nl/uuid:6e5896cf-05e1-4582-9b59-3a009b629a88.
Council of Science Editors:
Moerland-Masic I. Materials criticality in the Netherlands - response from the technological industry:. [Masters Thesis]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:6e5896cf-05e1-4582-9b59-3a009b629a88
University of St. Andrews
7.
Karahasanovic, Una.
Fluctuation-driven phase reconstruction at itinerant ferromagnetic quantum critical points
.
Degree: 2012, University of St. Andrews
URL: http://hdl.handle.net/10023/3188
► The formation of new phases close to itinerant electron quantum critical points has been observed experimentally in many compounds. We present a unified analytical model…
(more)
▼ The formation of new phases close to itinerant electron quantum critical points has been observed experimentally in many compounds. We present a unified analytical model that explains the emergence of new types of phases around itinerant ferromagnetic quantum critical points. The central idea of our analysis is that certain deformations of the Fermi surface enhance the phase-space available for low-energy quantum fluctuations and so self-consistently lower the free energy. Using this quantum order-by-disorder mechanism, we find instabilities towards the formation of a spiral ferromagnet and spin-nematic phase close to an itinerant ferromagnetic quantum critical point.
Further, we employ the quantum order-by-disorder mechanism to describe the partially ordered phase of MnSi. Using the simplest model of a Stoner-like helimagnetic transition, we show that quantum fluctuations naturally lead to the formation of an unusual phase near to the putative quantum critical point that shares many of the observed features of the partially ordered phase in MnSi. In particular, we predict an angular dependence of neutron scattering that is in good agreement with neutron-scattering data.
Advisors/Committee Members: Green, Andrew George (advisor).
Subjects/Keywords: Condensed matter theory;
Quantum criticality
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APA ·
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Karahasanovic, U. (2012). Fluctuation-driven phase reconstruction at itinerant ferromagnetic quantum critical points
. (Thesis). University of St. Andrews. Retrieved from http://hdl.handle.net/10023/3188
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Karahasanovic, Una. “Fluctuation-driven phase reconstruction at itinerant ferromagnetic quantum critical points
.” 2012. Thesis, University of St. Andrews. Accessed February 29, 2020.
http://hdl.handle.net/10023/3188.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Karahasanovic, Una. “Fluctuation-driven phase reconstruction at itinerant ferromagnetic quantum critical points
.” 2012. Web. 29 Feb 2020.
Vancouver:
Karahasanovic U. Fluctuation-driven phase reconstruction at itinerant ferromagnetic quantum critical points
. [Internet] [Thesis]. University of St. Andrews; 2012. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/10023/3188.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Karahasanovic U. Fluctuation-driven phase reconstruction at itinerant ferromagnetic quantum critical points
. [Thesis]. University of St. Andrews; 2012. Available from: http://hdl.handle.net/10023/3188
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
8.
Li, Shujuan.
Self-organizing criticality among Chinese cities.
Degree: 2010, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-714
► This dissertation employs the theory of self-organizing criticality (SOC) into the study of Chinese cities. SOC was proposed at the end of the 1980s to…
(more)
▼ This dissertation employs the theory of self-organizing
criticality (SOC) into the study of
Chinese cities. SOC was proposed at the end of the 1980s to explain system complexity
by combining both self-organizing and critical behaviors. SOC has been broadly used in
explaining phenomena in physical and social sciences. However, few attempts have been
made to connect urban studies with SOC because of the extreme complexity of urban
phenomena. This study develops a generalized SOC to study Chinese cities at both the
inter-urban and the intra-urban levels.
At the inter-urban level, this study finds that the rank size distribution of Chinese cities
has followed Zipf's law since 1984. In addition, the rank size dynamics of Chinese cities
experienced a spatiotemporal shift. Before 1996, city rank increases in a few small- and
middle-sized cities because of favorable economic policies offered by the central
government. After 1996, a majority of the Chinese cities began to be involved in this
rank size shuffling. Cities with increasing ranks present clustered distribution, mainly along the south and east coastal areas. Part of the reason is that the market economy
mechanism has transcended policy factors in determining the city competitiveness.
At the intra-urban level, the study shows that Shenzhen's urban physical development is
currently facing physical environmental thresholds, shifting the development strategies
spatiotemporally from fringe and isolated growth to fringe and infill growth. The
resulted urban patches show power law relationship both in the area-perimeter
distributions and the magnitude-frequency distributions.
In summary, this research proves the applicability of the generalized SOC in urban
studies. At both the inter-urban and the intra-urban levels, the Chinese cities present the
characteristics of SOC. Given a stable condition of power law, shifts occur in the inside
dynamics of China's urban system and Shenzhen city.
This study is one of the few empirical urban studies based on SOC. The study
contributes to the literature on SOC theory and provides theoretical breakthroughs in
studying Chinese cities. Finally, this study has potential implications on urban policies
and urban development strategies.
Advisors/Committee Members: Sui, Daneil (advisor), Liu, Hongxing (committee member), Bednarz, Robert (committee member), Lindell, Michael (committee member).
Subjects/Keywords: Self-organizing criticality; Urban system; Shenzhen
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APA (6th Edition):
Li, S. (2010). Self-organizing criticality among Chinese cities. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-714
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Li, Shujuan. “Self-organizing criticality among Chinese cities.” 2010. Thesis, Texas A&M University. Accessed February 29, 2020.
http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-714.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Shujuan. “Self-organizing criticality among Chinese cities.” 2010. Web. 29 Feb 2020.
Vancouver:
Li S. Self-organizing criticality among Chinese cities. [Internet] [Thesis]. Texas A&M University; 2010. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-714.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li S. Self-organizing criticality among Chinese cities. [Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-714
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Cornell University
9.
Ghose, Saugata.
Criticality-Aware Memory Systems
.
Degree: 2014, Cornell University
URL: http://hdl.handle.net/1813/38922
► Research on computer memory systems has been of increasing importance over the last decade, as they have become a significant bottleneck for application performance. While…
(more)
▼ Research on computer memory systems has been of increasing importance over the last decade, as they have become a significant bottleneck for application performance. While newer memory systems offer increased memory level parallelism, they cannot be used blindly due to contention for shared resources, making a beneficial and valid sequencing of memory requests requisite in order to exploit these improvements. Traditional approaches to improving this sequencing rely on highly sophisticated memory systems, where significant amounts of inference are often required to make these sophisticated decisions. Unfortunately, this design philosophy may no longer be sustainable. For example, as memory clock frequencies continue to scale while processor frequencies remain stagnant, sophisticated memory controllers are already being squeezed out, forcing computer architects to revert to simpler designs. We use this as an opportunity to symbiotically involve the processor cores in the decision-making process, simultaneously offloading the complexity from these memory decision makers while extracting richer information on each memory operation. This work studies the concept of load
criticality, where the processors themselves identify the loads which they believe to be most important. Using loads that block at the end of the processor pipeline as an indicator of
criticality, we annotate these load block predictions onto memory requests, for use by various components in memory. Our research finds that even using small, sim- ple predictors for load
criticality can offer comparable performance to complex state-of-the-art schedulers for both parallel applications and multiprogrammed workloads on a contemporary multicore system. This same predictor can be used to obtain significant performance improvements and energy savings when using hardware prefetchers. Ultimately, our
criticality-aware design approach achieves the performance of traditionally-complex memory systems, and does so with trivial overheads that are attractive for future commercial adoption.
Advisors/Committee Members: Manohar, Rajit (committeeMember), Albonesi, David H. (committeeMember).
Subjects/Keywords: load criticality;
memory systems;
computer architecture
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APA (6th Edition):
Ghose, S. (2014). Criticality-Aware Memory Systems
. (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/38922
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ghose, Saugata. “Criticality-Aware Memory Systems
.” 2014. Thesis, Cornell University. Accessed February 29, 2020.
http://hdl.handle.net/1813/38922.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ghose, Saugata. “Criticality-Aware Memory Systems
.” 2014. Web. 29 Feb 2020.
Vancouver:
Ghose S. Criticality-Aware Memory Systems
. [Internet] [Thesis]. Cornell University; 2014. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/1813/38922.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ghose S. Criticality-Aware Memory Systems
. [Thesis]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/38922
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Melbourne
10.
LI, FENG.
‘Critical’ practice in state-owned design institutes in post-Mao China (1976-2000s): a case study of CAG (China Architecture Design and Research Group).
Degree: 2010, University of Melbourne
URL: http://hdl.handle.net/11343/35453
► During the past three decades, China has witnessed an unprecedented upsurge of construction at astonishing speed. Architectural design firms from all over the world have…
(more)
▼ During the past three decades, China has witnessed an unprecedented upsurge of construction at astonishing speed. Architectural design firms from all over the world have participated in China’s design and building practice. One of the leading forces of this progress, however, is the state-owed design institute, which is a unique type of architectural design practice originally formed in the Maoist era (1949 - 1976) in China. Different from private practices, the design institute is institutionally associated with the government and significantly influenced by governmental policies. Taking the China Architecture Design and Research Group (CAG) as an example, this thesis aims to summarize the common and consistent features of the practice in the design institute in the post-Mao era (1976 - present) and to find an underlying socio-political mechanism that is perhaps driving the design practice in specific settings.
In this research, the practice in the design institute is studied with a focus on the design agenda of architects. In order to capture a picture of the evolution of design ideas, I employed the concept of ‘criticality’ into my research from the ‘critical’ and ‘post-critical’ discussion in North America and East Asia. The formal characteristics of CAG’s works are tested in this measurement for an analytical interpretation.
The investigation of CAG is conducted through both data analysis and fieldwork. Information from books, journals and the internet is collected to develop a comprehensive understanding of the design institute. During my fieldwork in Beijing, I visited important buildings designed by CAG and interviewed the chief architect of this institute. The evolution of its institutional system and its common design features in architectural language are at the core of this study.
Through empirical studies on the relevant issues of CAG, I try to examine a relationship between a government-orientated operation of the institute and the design approach of the architects, and further explore the significance of this practicing mode in the socio-political context of contemporary China.
Despite the criticism often raised in the existing literature, this thesis argues for a collectivist perspective for evaluations of the design institute. With the economic conditions of a developing country in mind, this thesis suggests that the design agenda of architects in the design institute reflects long-term considerations of public welfare. Consequently, the participation of the government in architectural practice, as I would propose at the end of this thesis, is an effective and necessary mode, especially for developing countries. This standpoint can help establishing a more cross-cultural and international framework in theorizing the architectural practice of different countries and cultures including nations such as China in contemporary…
Subjects/Keywords: Chinese architect; state-owned design institute; criticality
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APA ·
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MLA ·
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Manager
APA (6th Edition):
LI, F. (2010). ‘Critical’ practice in state-owned design institutes in post-Mao China (1976-2000s): a case study of CAG (China Architecture Design and Research Group). (Masters Thesis). University of Melbourne. Retrieved from http://hdl.handle.net/11343/35453
Chicago Manual of Style (16th Edition):
LI, FENG. “‘Critical’ practice in state-owned design institutes in post-Mao China (1976-2000s): a case study of CAG (China Architecture Design and Research Group).” 2010. Masters Thesis, University of Melbourne. Accessed February 29, 2020.
http://hdl.handle.net/11343/35453.
MLA Handbook (7th Edition):
LI, FENG. “‘Critical’ practice in state-owned design institutes in post-Mao China (1976-2000s): a case study of CAG (China Architecture Design and Research Group).” 2010. Web. 29 Feb 2020.
Vancouver:
LI F. ‘Critical’ practice in state-owned design institutes in post-Mao China (1976-2000s): a case study of CAG (China Architecture Design and Research Group). [Internet] [Masters thesis]. University of Melbourne; 2010. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/11343/35453.
Council of Science Editors:
LI F. ‘Critical’ practice in state-owned design institutes in post-Mao China (1976-2000s): a case study of CAG (China Architecture Design and Research Group). [Masters Thesis]. University of Melbourne; 2010. Available from: http://hdl.handle.net/11343/35453
University of Edinburgh
11.
Abdul-Jabbar, Gino Jamal.
Emergence of magnetic order in the Rare Earth Intermetallic PrPtAl.
Degree: PhD, 2014, University of Edinburgh
URL: http://hdl.handle.net/1842/16232
► Magnetism of the rare earth intermetallics present some of the most important challenges for understanding correlated electron systems . In this thesis I distil this…
(more)
▼ Magnetism of the rare earth intermetallics present some of the most important challenges for understanding correlated electron systems . In this thesis I distil this immense challenge, to understanding the unusual magnetic properties of the rare earth intermetallic PrPtAl. At first glance, PrPtAl appears to be a typical local f moment system, where the electronic states of Pr3+ are composed of nine singlet states, split by the crystal electric field for the J = 4 spin-orbit state in low crystal symmetry (orthorhombic, Pnma). The absence of a magnetic ground state would naively lead us to expect PrPtAl to be a simple paramagnet, but the results from this thesis show that the material is more complex, ordering magnetically at 5.7 K in spite of its singlet ground state. This thesis investigates the emergence of magnetic order in PrPtAl. For this purpose, the properties of PrPtAl were measured using high quality single crystals grown using the Czochralski technique. These crystals were used to measure: bulk properties at the Centre for Science at Extreme Conditions (CSEC, University of Edinburgh) and to perform neutron and x-ray magnetic scattering experiments at central facilities within Europe (ISIS, ESRF) and North America (NCNR). The results of this thesis conclusively show that PrPtAl does not directly realise ferromagnetism, but initially orders into two modulated magnetic states between 5.7-5.2 K and 5.2-4.7 K. These states cannot be explained using a simple local moment picture, but appear to be driven by a complex interaction between local moments and conduction electrons, in a possible quantum order-by-disorder type mechanism.
Subjects/Keywords: 538; PrPtAl; induced magnetisation; quantum criticality
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APA (6th Edition):
Abdul-Jabbar, G. J. (2014). Emergence of magnetic order in the Rare Earth Intermetallic PrPtAl. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/16232
Chicago Manual of Style (16th Edition):
Abdul-Jabbar, Gino Jamal. “Emergence of magnetic order in the Rare Earth Intermetallic PrPtAl.” 2014. Doctoral Dissertation, University of Edinburgh. Accessed February 29, 2020.
http://hdl.handle.net/1842/16232.
MLA Handbook (7th Edition):
Abdul-Jabbar, Gino Jamal. “Emergence of magnetic order in the Rare Earth Intermetallic PrPtAl.” 2014. Web. 29 Feb 2020.
Vancouver:
Abdul-Jabbar GJ. Emergence of magnetic order in the Rare Earth Intermetallic PrPtAl. [Internet] [Doctoral dissertation]. University of Edinburgh; 2014. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/1842/16232.
Council of Science Editors:
Abdul-Jabbar GJ. Emergence of magnetic order in the Rare Earth Intermetallic PrPtAl. [Doctoral Dissertation]. University of Edinburgh; 2014. Available from: http://hdl.handle.net/1842/16232
University of North Texas
12.
Zare, Marzieh.
Cooperation-induced Criticality in Neural Networks.
Degree: 2013, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc283813/
► The human brain is considered to be the most complex and powerful information-processing device in the known universe. The fundamental concepts behind the physics of…
(more)
▼ The human brain is considered to be the most complex and powerful information-processing device in the known universe. The fundamental concepts behind the physics of complex systems motivate scientists to investigate the human brain as a collective property emerging from the interaction of thousand agents. In this dissertation, I investigate the emergence of cooperation-induced properties in a system of interacting units. I demonstrate that the neural network of my research generates a series of properties such as avalanche distribution in size and duration coinciding with the experimental results on neural networks both in vivo and in vitro. Focusing attention on temporal complexity and fractal index of the system, I discuss how to define an order parameter and phase transition.
Criticality is assumed to correspond to the emergence of temporal complexity, interpreted as a manifestation of non-Poisson renewal dynamics. In addition, I study the transmission of information between two networks to confirm the
criticality and discuss how the network topology changes over time in the light of Hebbian learning.
Advisors/Committee Members: Grigolini, Paolo, Krokhin, Arkadii, Gross, Guenter, Kowalski, Jacek.
Subjects/Keywords: Cooperation; criticality; temporal complexity; phase transition
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University of New South Wales
13.
Kharkov, Yaroslav.
Quantum critical matter: Casimir pairing, emergent orders and topological defects.
Degree: Physics, 2017, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/58863
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:47822/SOURCE02?view=true
► In this thesis we address a few problems on critical phenomena in two- and three dimensionalquantum materials. Specifically we consider high temperature superconductors, dimerized quantum…
(more)
▼ In this thesis we address a few problems on critical phenomena in two- and three dimensionalquantum materials. Specifically we consider high temperature superconductors, dimerized quantum magnets and frustrated magnets.First, motivated by the recent discovery of a magnetic quantum critical point in hole-doped cuprates, we study the influence of the
criticality on the superconducting pairing. We consider a fermion- fermion interaction in a 2D system at a quantum critical point. We found a new physical mechanism of fermion pairing by quantum critical fluctuations, that is similar to a Casimir effect. The Casimir pairing mechanism has conceptual similarities with chiral bag models in quantum chromodynamics and is generic for a wide class of quantum phase transitions.Second, we consider an impurity screening problem in a 3D magnet close to a quantum critical point. We show that a local magnetic moment of the impurity becomes screened by the cloud of critical magnons and we calculate the distribution of a magnetization in the cloud. Our results show that adding a small concentration of impurities can significantly affect critical properties of the system.Next, we perform a phenomenological study of incommensurate charge density wave (CDW) in cuprates. Proceeding with a combined analysis of recent experimental data on the CDW, we find the amplitude and the spatial pattern of the CDW. From nuclear magnetic resonance data we extract the s, s' and d-wave amplitudes of the CDW and rule out the checkerboard pattern of the CDW. We show that data potentially rules out a wide class of theoretical models of the CDW.Finally, we consider topological defects (skyrmions and merons) in frustrated magnets which are in the vicinity of a phase transition from a collinear to a spiral magnetic state.We show that isolated metastable skyrmions can exist in the absence of an external magnetic field in frustrated magnets with an easy-axis/easy-plane anisotropy. We found exotic skyrmion states with a large topological charge: skyrmion rings and meron rings.In the systems with easy-plane spin anisotropy we demonstrated that at the critical point a skyrmion with a unit topological charge ``fractionalizes'' into a pair of merons.
Advisors/Committee Members: Sushkov, Oleg, Physics, Faculty of Science, UNSW.
Subjects/Keywords: High temperature superconductivity; Quantum criticality; Quantum magnetism
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APA (6th Edition):
Kharkov, Y. (2017). Quantum critical matter: Casimir pairing, emergent orders and topological defects. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/58863 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:47822/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Kharkov, Yaroslav. “Quantum critical matter: Casimir pairing, emergent orders and topological defects.” 2017. Doctoral Dissertation, University of New South Wales. Accessed February 29, 2020.
http://handle.unsw.edu.au/1959.4/58863 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:47822/SOURCE02?view=true.
MLA Handbook (7th Edition):
Kharkov, Yaroslav. “Quantum critical matter: Casimir pairing, emergent orders and topological defects.” 2017. Web. 29 Feb 2020.
Vancouver:
Kharkov Y. Quantum critical matter: Casimir pairing, emergent orders and topological defects. [Internet] [Doctoral dissertation]. University of New South Wales; 2017. [cited 2020 Feb 29].
Available from: http://handle.unsw.edu.au/1959.4/58863 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:47822/SOURCE02?view=true.
Council of Science Editors:
Kharkov Y. Quantum critical matter: Casimir pairing, emergent orders and topological defects. [Doctoral Dissertation]. University of New South Wales; 2017. Available from: http://handle.unsw.edu.au/1959.4/58863 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:47822/SOURCE02?view=true
Virginia Tech
14.
Butler, James Michael.
Benchmarking of the RAPID Eigenvalue Algorithm using the ICSBEP Handbook.
Degree: MS, Nuclear Engineering, 2019, Virginia Tech
URL: http://hdl.handle.net/10919/93745
► In the modeling and simulation of nuclear systems, two parameters are of key importance: the system eigenvalue and the fission distribution. The system eigenvalue, known…
(more)
▼ In the modeling and simulation of nuclear systems, two parameters are of key importance: the system eigenvalue and the fission distribution. The system eigenvalue, known as kef f , is the ratio of neutron production from fission in the current neutron generation compared with the absorption and leakage of neutrons from the system in the previous neutron generation. When this ratio is equal to one, the system is critical and is a self-sustaining chain reaction. Knowledge of the fission distribution is important in the nuclear power industry, as it enables engineers to determine the best reactor core assembly configuration to maintain an even power distribution. Several methods have been developed over the years to effectively solve for a nuclear systems fission distribution and system eigenvalue. Aspects of both Monte Carlo and deterministic transport methods have been combined into RAPID’s MRT methodology. It is capable of accurately determining the system eigenvalue and fission distribution in real time. This thesis examines the accuracy of the RAPID algorithm using four unique problems from the ICSBEP handbook. These problems help us to test the limits of the FM method in RAPID through the modeling of small, unique geometric configurations not seen in large, uniformly configured power reactor cores and spent fuel pools. For comparison, each problem is modeled using the Serpent Monte Carlo code, an accurate code meant to serve as the industry standard for determination of the fission distribution of each problem. This model is then used to generate a set of FM coefficients for use in RAPID calculations. It is demonstrated that the eigenvalues calculated by RAPID and Serpent agree with the experimental data within the given experimental uncertainty. The fission distribution obtained by RAPID is also in agreement with the Serpent reference model. Finally, the RAPID eigenvalue calculation is significantly faster than the corresponding Serpent reference model, with speed-ups ranging from 4x to 34x demonstrated.
Advisors/Committee Members: Haghighat, Alireza (committeechair), Pitchumani, Ranga (committee member), Pierson, Mark Alan (committee member).
Subjects/Keywords: neutron transport theory; fission matrix; criticality safety
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APA (6th Edition):
Butler, J. M. (2019). Benchmarking of the RAPID Eigenvalue Algorithm using the ICSBEP Handbook. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/93745
Chicago Manual of Style (16th Edition):
Butler, James Michael. “Benchmarking of the RAPID Eigenvalue Algorithm using the ICSBEP Handbook.” 2019. Masters Thesis, Virginia Tech. Accessed February 29, 2020.
http://hdl.handle.net/10919/93745.
MLA Handbook (7th Edition):
Butler, James Michael. “Benchmarking of the RAPID Eigenvalue Algorithm using the ICSBEP Handbook.” 2019. Web. 29 Feb 2020.
Vancouver:
Butler JM. Benchmarking of the RAPID Eigenvalue Algorithm using the ICSBEP Handbook. [Internet] [Masters thesis]. Virginia Tech; 2019. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/10919/93745.
Council of Science Editors:
Butler JM. Benchmarking of the RAPID Eigenvalue Algorithm using the ICSBEP Handbook. [Masters Thesis]. Virginia Tech; 2019. Available from: http://hdl.handle.net/10919/93745
15.
DUNNE, GERARD JOHN.
Critical Thinking: A Neo-Aristotelian Perspective.
Degree: School of Education. Discipline of Education, 2019, Trinity College Dublin
URL: http://hdl.handle.net/2262/86046
► This dissertation seeks to cultivate a deeper conceptual understanding of critical thinking within the philosophy of education tradition. For until such time as theorists understand…
(more)
▼ This dissertation seeks to cultivate a deeper conceptual understanding of critical thinking within the philosophy of education tradition. For until such time as theorists understand what critical thinking is, including, how it works, educators will remain unclear as to what sort of educational accomplishments are required if one is to be rightly considered a critical thinker, and what means are likely to be successful in teaching people to think critically. Within this context, the dissertation argues for a neo-Aristotelian conceptualization of critical thought based on Harvey Siegel's (1988, p.23) 'reasons-assessment' criteria. Here I argue for the importance of critical thought embodying the prototypical phronimos, where habituated deliberative excellence accurately determines undefeated or decisive reasons for normatively-calibrated actions in the practical domain. This judgment (proairesis) is based on stress-testing the strength of normatively-calibrated reasons supporting a given course of action. Drawing on theorists such as, Dunne (1993), Paul & Elder (2002; 2005; 2007; 2009), and Siegel (1988; 1997; 2017), I proffer a new conceptual explication of
criticality, one which integrates phronetic deliberation and judgment with a deep sensitivity and responsiveness to the probative force of reasons-normativity in accurately determining undefeated reasons for 'knowing what one should do' in the practical domain (Anscombe, 1957, p13).
Advisors/Committee Members: Seery, Aidan.
Subjects/Keywords: Criticality; critical thinking; Phronesis; Reasons-Normativity
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APA (6th Edition):
DUNNE, G. J. (2019). Critical Thinking: A Neo-Aristotelian Perspective. (Thesis). Trinity College Dublin. Retrieved from http://hdl.handle.net/2262/86046
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
DUNNE, GERARD JOHN. “Critical Thinking: A Neo-Aristotelian Perspective.” 2019. Thesis, Trinity College Dublin. Accessed February 29, 2020.
http://hdl.handle.net/2262/86046.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
DUNNE, GERARD JOHN. “Critical Thinking: A Neo-Aristotelian Perspective.” 2019. Web. 29 Feb 2020.
Vancouver:
DUNNE GJ. Critical Thinking: A Neo-Aristotelian Perspective. [Internet] [Thesis]. Trinity College Dublin; 2019. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/2262/86046.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
DUNNE GJ. Critical Thinking: A Neo-Aristotelian Perspective. [Thesis]. Trinity College Dublin; 2019. Available from: http://hdl.handle.net/2262/86046
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
16.
Iacovelli, Saverio.
Adaptive mid-term and short-term scheduling of mixed-criticality systems.
Degree: PhD, 2019, University of Hertfordshire
URL: http://hdl.handle.net/2299/22157
► A mixed-criticality real-time system is a real-time system having multiple tasks classified according to their criticality. Research on mixed-criticality systems started to provide an effective…
(more)
▼ A mixed-criticality real-time system is a real-time system having multiple tasks classified according to their criticality. Research on mixed-criticality systems started to provide an effective and cost efficient a priori verification process for safety critical systems. The higher the criticality of a task within a system and the more the system should guarantee the required level of service for it. However, such model poses new challenges with respect to scheduling and fault tolerance within real-time systems. Currently, mixed-criticality scheduling protocols severely degrade lower criticality tasks in case of resource shortage to provide the required level of service for the most critical ones. The actual research challenge in this field is to devise robust scheduling protocols to minimise the impact on less critical tasks. This dissertation introduces two approaches, one short-term and the other medium-term, to appropriately allocate computing resources to tasks within mixed-criticality systems both on uniprocessor and multiprocessor systems. The short-term strategy consists of a protocol named Lazy Bailout Protocol (LBP) to schedule mixed-criticality task sets on single core architectures. Scheduling decisions are made about tasks that are active in the ready queue and that have to be dispatched to the CPU. LBP minimises the service degradation for lower criticality tasks by providing to them a background execution during the system idle time. After, I refined LBP with variants that aim to further increase the service level provided for lower criticality tasks. However, this is achieved at an increased cost of either system offline analysis or complexity at runtime. The second approach, named Adaptive Tolerance-based Mixed-criticality Protocol (ATMP), decides at runtime which task has to be allocated to the active cores according to the available resources. ATMP permits to optimise the overall system utility by tuning the system workload in case of shortage of computing capacity at runtime. Unlike the majority of current mixed-criticality approaches, ATMP allows to smoothly degrade also higher criticality tasks to keep allocated lower criticality ones.
Subjects/Keywords: Real-time systems; Mixed-criticality systems; Fixed-priority scheduling; Mixed-criticality scheduling on on unicore sustems; Mixed-criticality partitioned scheduling; Utility optimisation
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APA ·
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APA (6th Edition):
Iacovelli, S. (2019). Adaptive mid-term and short-term scheduling of mixed-criticality systems. (Doctoral Dissertation). University of Hertfordshire. Retrieved from http://hdl.handle.net/2299/22157
Chicago Manual of Style (16th Edition):
Iacovelli, Saverio. “Adaptive mid-term and short-term scheduling of mixed-criticality systems.” 2019. Doctoral Dissertation, University of Hertfordshire. Accessed February 29, 2020.
http://hdl.handle.net/2299/22157.
MLA Handbook (7th Edition):
Iacovelli, Saverio. “Adaptive mid-term and short-term scheduling of mixed-criticality systems.” 2019. Web. 29 Feb 2020.
Vancouver:
Iacovelli S. Adaptive mid-term and short-term scheduling of mixed-criticality systems. [Internet] [Doctoral dissertation]. University of Hertfordshire; 2019. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/2299/22157.
Council of Science Editors:
Iacovelli S. Adaptive mid-term and short-term scheduling of mixed-criticality systems. [Doctoral Dissertation]. University of Hertfordshire; 2019. Available from: http://hdl.handle.net/2299/22157
Uppsala University
17.
Westrin, Pontus.
External Conditions Effects on the Self-Organised Criticality of the Calving Glacier Front of Tunabreen, Svalbard.
Degree: Earth Sciences, 2015, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-255867
► Mass balance processes in glaciers are important for determining the growth or retreat of ice. Calving, the mechanical breakage of ice bergs from a…
(more)
▼ Mass balance processes in glaciers are important for determining the growth or retreat of ice. Calving, the mechanical breakage of ice bergs from a glacier front, is a poorly understood phenomenon. This process has great importance to the mass balance of many glaciers, for example on Antarctica and in the Arctic. A recent paper by Åström et al. (2014) compare calving fronts to Self-Organized Critical (SOC) systems, especially the Abelian sand pile model, meaning that the calving front will stay at a critical state at all times. Fluctuations in external conditions will cause the glacier front to either retreat or advance. The calving frequency and size distribution of Tunabreen, a tidewater glacier in Svalbard, was studied during August and September, 2014, with the use of a time-lapse camera set up in front of the calving front. An 11-day period is studied in detail and compared to certain external factors, i.e. tide, air temperature, humidity, atmospheric pressure, wind speed and wind direction. The results are also compared to the relationships found by Åström et al. (2014). The results vary: tide relationships are found as the amplitude reaches above 1 meter, but seize to correlate as the tide falls off. Temperature trends are found for certain periods, but are of low credibility. Humidity, atmospheric pressure, wind speed and wind direction show low to no correlation with the calving size distribution. Fragment size distribution and calving rates show good correlation with the results from Åström et al. (2014). This helps to confirm the theory of SOC applied to calving fronts. Time-lapse photography is deemed as a good way to observe calving fronts, but have certain problems which are mostly related to the weather. Longer time periods would be needed to find better long term relationships between external conditions and calving frequencies, but data is hard to acquire and time consuming to process. The theory of SOC applied to calving fronts is promising and opens up new discussions for the research community.
Massbalansprocesser för glaciärer är viktiga för att bestämma om isen drar sig tillbaka eller avancerar. Den mekaniska brytningen av isberg från glaciärer kallas kalvning. Kalvning är väldigt viktig för ett flertal glaciärers massbalans, exempelvis för landisen på Antarktis och glaciärer i Arktis. Ny forskning visar att kalvande glaciärfronter alltid försöker befinna sig i ett kritiskt läge, liknande ett så kallat Self-Organized Critical (SOC) system. Detta kan liknas vid hur en sandhög försöker befinna sig vid sin kritiska sluttningsvinkel när ett konstant flöde av sandkorn adderas. Adderandet av sandkorn kan jämföras med hur externa förhållanden, så som temperatur och tidvatten, ändras. När dessa värden ändras med tid så kommer fronten kalva, mycket likt hur sandhögen rasar när sandkorn tillförs. Externa förhållanden kommer alltså styra om glaciären kalvar eller inte, och när.En time-lapse-kamera installerades framför Tunabreen, en tidvatten glaciär på Svalbard, under Augusti-September, 2014.…
Subjects/Keywords: Calving; calving model; self-organized criticality; glacier dynamics; Tunabreen; Kalvning; kalvningsmodell; self-organized criticality; glaciärdynamik; Tunabreen; Physical Geography; Naturgeografi
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APA (6th Edition):
Westrin, P. (2015). External Conditions Effects on the Self-Organised Criticality of the Calving Glacier Front of Tunabreen, Svalbard. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-255867
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Westrin, Pontus. “External Conditions Effects on the Self-Organised Criticality of the Calving Glacier Front of Tunabreen, Svalbard.” 2015. Thesis, Uppsala University. Accessed February 29, 2020.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-255867.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Westrin, Pontus. “External Conditions Effects on the Self-Organised Criticality of the Calving Glacier Front of Tunabreen, Svalbard.” 2015. Web. 29 Feb 2020.
Vancouver:
Westrin P. External Conditions Effects on the Self-Organised Criticality of the Calving Glacier Front of Tunabreen, Svalbard. [Internet] [Thesis]. Uppsala University; 2015. [cited 2020 Feb 29].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-255867.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Westrin P. External Conditions Effects on the Self-Organised Criticality of the Calving Glacier Front of Tunabreen, Svalbard. [Thesis]. Uppsala University; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-255867
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
18.
Regiane de Souza Costa.
Configuração da Educação Física no CTUR Entrelaçamentos Cotidianos e Possibilidades Pedagógicas. 2010.
Degree: 2010, Universidade Federal Rural do Rio de Janeiro
URL: http://bdtd.ufrrj.br//tde_busca/arquivo.php?codArquivo=1529
► Esta dissertação está fundamentada na pesquisa realizada no Colégio Técnico da Universidade Rural (CTUR/UFRRJ), contando com a participação de estudantes do 3 ano do Curso…
(more)
▼ Esta dissertação está fundamentada na pesquisa realizada no Colégio Técnico da Universidade Rural (CTUR/UFRRJ), contando com a participação de estudantes do 3 ano do Curso Técnico em Agropecuária Orgânica, um dos professores de Educação Física da escola e, ainda, uma observadora dos processos pedagógicos. Traz consigo a preocupação central com uma Educação Física crítica e emancipatória e seus elementos constitutivos para a formação humana/profissional. Apresentou como objetivo geral investigar a manifestação da Educação Física Escolar como componente curricular da Educação Profissional Agrícola do CTUR. Para tanto, debruçou-se sobre um aporte teórico-metodológico que permitiu captar as variações cotidianas dispostas na realidade. Contou com a Abordagem Qualitativa de Pesquisa em Educação, tendo a Metodologia da Pesquisa-Ação o seu principal eixo orientador. Sob esta fundamentação foi possível conhecer, num primeiro momento, como a Educação Física se manifestou nos anos escolares, com base na relação objetivos-métodos-avaliação. Num segundo momento, foram utilizadas as descrições quanto à configuração da Educação Física nos anos anteriores para que fossem construídas, pelo coletivo envolvido na pesquisa, oficinas temáticas, visando possibilitar um processo de sensibilização/reflexão diante da pluralidade de interpretações que esta área é capaz de apresentar. Os temas orientadores das oficinas foram baseados na Matriz de Referência para o Novo ENEM 2009, reformulação do Exame Nacional do Ensino Médio proposta pelo Ministério da Educação. A conjugação dos dados obtidos com a aplicação dos questionários, das entrevistas, dos relatos dos estudantes e das observações dos espaçostempos pedagógicos sinalizou que a Educação Física, quando tratada nas suas múltiplas possibilidades interpretativas, apoiando-se na criticidade, se apresenta como um importante componente para a formação do homem, numa perspectiva holística.
This dissertation is based on research conducted at the Technical College of Rural University (CTUR / UFRRJ), with the participation of students in 3rd year of the Technical Course in Agricultural Structure, one of the teachers of Physical Education School and also an observer of pedagogical processes. Brings with it the main concern a critical and emancipatory Physical Education and its elements for the human / professional formation. Its objective is to investigate the manifestation of physical education as a curricular component of the Vocation Agricultural Education from CTUR. For this, its focused on a theoretical and methodological framework that allowed capture changes in everyday reality. Approach based on Qualitative Research in Education, and the Methodology of Action Research as its main key element. Under this reasoning was possible to know at first, such as physical education was manifested in the school years, based on the relation-goals-assessment methods. Secondly, the descriptions were used as the setting of Physical Education in previous years that were built by the group involved in…
Advisors/Committee Members: Nádia Maria Pereira de Souza.
Subjects/Keywords: formação holística; emancipação; criticidade; EDUCACAO; training holistic; emancipation; criticality
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APA (6th Edition):
Costa, R. d. S. (2010). Configuração da Educação Física no CTUR Entrelaçamentos Cotidianos e Possibilidades Pedagógicas. 2010. (Thesis). Universidade Federal Rural do Rio de Janeiro. Retrieved from http://bdtd.ufrrj.br//tde_busca/arquivo.php?codArquivo=1529
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Costa, Regiane de Souza. “Configuração da Educação Física no CTUR Entrelaçamentos Cotidianos e Possibilidades Pedagógicas. 2010.” 2010. Thesis, Universidade Federal Rural do Rio de Janeiro. Accessed February 29, 2020.
http://bdtd.ufrrj.br//tde_busca/arquivo.php?codArquivo=1529.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Costa, Regiane de Souza. “Configuração da Educação Física no CTUR Entrelaçamentos Cotidianos e Possibilidades Pedagógicas. 2010.” 2010. Web. 29 Feb 2020.
Vancouver:
Costa RdS. Configuração da Educação Física no CTUR Entrelaçamentos Cotidianos e Possibilidades Pedagógicas. 2010. [Internet] [Thesis]. Universidade Federal Rural do Rio de Janeiro; 2010. [cited 2020 Feb 29].
Available from: http://bdtd.ufrrj.br//tde_busca/arquivo.php?codArquivo=1529.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Costa RdS. Configuração da Educação Física no CTUR Entrelaçamentos Cotidianos e Possibilidades Pedagógicas. 2010. [Thesis]. Universidade Federal Rural do Rio de Janeiro; 2010. Available from: http://bdtd.ufrrj.br//tde_busca/arquivo.php?codArquivo=1529
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
19.
Mouafo Tchinda, Yves.
Robustesse des applications temps-réel multicoeurs : techniques de construction d'un ordonnacement équitable tolérant aux pannes matérielles : Robustness of Multicore Real-Time Apllications : Building Techniques for Processor Failures Tolerant Scheduling.
Degree: Docteur es, Informatique et applications, 2017, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique
URL: http://www.theses.fr/2017ESMA0015
► Cette thèse propose des techniques de construction d'une séquence d'ordonnancement valide par un algorithme équitable pour des systèmes temps-réel multicoeurs subissant des pannes processeurs permanentes.…
(more)
▼ Cette thèse propose des techniques de construction d'une séquence d'ordonnancement valide par un algorithme équitable pour des systèmes temps-réel multicoeurs subissant des pannes processeurs permanentes. Selon la nature des tâches les concepteurs peuvent allouer ou pas du temps supplémentaire pour récupérer l'exécution perdue. Dans un premier temps, nous traitons le cas de la défaillance d'un seul coeur. Nous montrons alors que s'il n'y a pas d'allocation de temps supplémentaire, prévoir un coeur de plus que le minimum nécessaire permet de construire une séquence valide : c'est la Technique de la Redondance Matérielle Limitée. Toutefois, si une telle allocation s'impose, nous proposons trois techniques : la Technique des Sous-tâches de Substitution qui augmente le WCET des tâches afin de prévoir du temps additionnel en remplacement du temps perdu, la Technique Contraindre puis Relâcher qui crée une marge de temps entre le délai critique et la période d'une tâche pour rattraper l'exécution perdue et la Technique du Flux Apériodique (TFA) qui réordonnance l'exécution perdue dans les unités de temps creux équitablement réparties. Ensuite, l'utilisation conjointe de ces techniques est envisagée en fonction de la nature des tâches impactées. Enfin, le cas de la défaillance de plusieurs coeurs est étudié. Pour ajuster la charge du système au nombre de coeurs fonctionnels, deux approches sont proposées : le changement de mode de criticité qui modifie les paramètres temporels de certaines tâches et l'abandon de certaines tâches en fonction de leur importance dans le système.
This thesis proposes several techniques to build a valid schedule with a Pfair algorithm for multicore real-time systems despite permanent processor failures. Depending on the nature of the tasks, additional time may be allocated or not to recover the lost execution. First, we consider a single core failure. We then show that if no additional time is allocated, the use of a single more core than the required minimum provides a valid schedule : it is the Limited Hardware Redundancy Technique. However, if full recovery is mandatory, we propose three techniques : the Substitute Subtasks Technique which increases the WCET to provide additionnal time which can be used to recover the lost time, the Constrain and Release Technique which creates a time margin between each task's deadline and the following period which can be used to recover the lost execution and the Aperiodic Flow Technique which reschedules the lost execution within the idle time units. Then, these techniques are mixed to adapt the scheduling behaviour to the nature of the impacted tasks. Finally, the case of the failure of several cores is studied.To adapt the system load to the number of remaining functionnal cores we use the criticality mode change which modifies the temporal parameters of some tasks or we discard some tasks according to their importance.
Advisors/Committee Members: Choquet-Geniet, Annie (thesis director), Largeteau-Skapin, Gaëlle (thesis director).
Subjects/Keywords: Algorithmes équitables; Systèmes à criticité multiple; Fair algorithms; Mixed criticality systemes
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APA ·
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APA (6th Edition):
Mouafo Tchinda, Y. (2017). Robustesse des applications temps-réel multicoeurs : techniques de construction d'un ordonnacement équitable tolérant aux pannes matérielles : Robustness of Multicore Real-Time Apllications : Building Techniques for Processor Failures Tolerant Scheduling. (Doctoral Dissertation). Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique. Retrieved from http://www.theses.fr/2017ESMA0015
Chicago Manual of Style (16th Edition):
Mouafo Tchinda, Yves. “Robustesse des applications temps-réel multicoeurs : techniques de construction d'un ordonnacement équitable tolérant aux pannes matérielles : Robustness of Multicore Real-Time Apllications : Building Techniques for Processor Failures Tolerant Scheduling.” 2017. Doctoral Dissertation, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique. Accessed February 29, 2020.
http://www.theses.fr/2017ESMA0015.
MLA Handbook (7th Edition):
Mouafo Tchinda, Yves. “Robustesse des applications temps-réel multicoeurs : techniques de construction d'un ordonnacement équitable tolérant aux pannes matérielles : Robustness of Multicore Real-Time Apllications : Building Techniques for Processor Failures Tolerant Scheduling.” 2017. Web. 29 Feb 2020.
Vancouver:
Mouafo Tchinda Y. Robustesse des applications temps-réel multicoeurs : techniques de construction d'un ordonnacement équitable tolérant aux pannes matérielles : Robustness of Multicore Real-Time Apllications : Building Techniques for Processor Failures Tolerant Scheduling. [Internet] [Doctoral dissertation]. Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique; 2017. [cited 2020 Feb 29].
Available from: http://www.theses.fr/2017ESMA0015.
Council of Science Editors:
Mouafo Tchinda Y. Robustesse des applications temps-réel multicoeurs : techniques de construction d'un ordonnacement équitable tolérant aux pannes matérielles : Robustness of Multicore Real-Time Apllications : Building Techniques for Processor Failures Tolerant Scheduling. [Doctoral Dissertation]. Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique; 2017. Available from: http://www.theses.fr/2017ESMA0015
20.
Costa, Ariadne de Andrade.
Quasi-criticalidade auto-organizada em avalanches neuronais.
Degree: Mestrado, Física Aplicada à Medicina e Biologia, 2011, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/59/59135/tde-17112011-204509/
;
► Experimentos têm revelado que redes de neurônios, tanto in vitro como in vivo, mantêm atividade descrita por avalanches e se organizam em um estado crítico…
(more)
▼ Experimentos têm revelado que redes de neurônios, tanto in vitro como in vivo, mantêm atividade descrita por avalanches e se organizam em um estado crítico no qual essas avalanches são distribuídas de acordo com leis de potência. Mostramos no presente trabalho que um modelo de rede de elementos excitáveis com sinapses dinâ- micas é capaz de exibir criticalidade auto-organizada para ampla região do espaço de parâmetros. Nossos resultados estão de acordo com outros estudos que indicam que a depressão sináptica de curto prazo constitui mecanismo suciente para produzir criticalidade em avalanches neuronais. No entanto, segundo diversos pesquisadores, embora o ajuste de parâmetros seja grosso para que haja criticalidade no modelo, é mais preciso dizer que o sistema não apresenta criticalidade auto-organizada genu ína, mas sim quasi-criticalidade auto-organizada, como os demais modelos não conservativos presentes na literatura.
Experiments have shown that neuronal networks, both in vitro and in vivo, maintain activity described by avalanches and they are organized into a critical state in which these avalanches are distributed according to power laws. We have demonstrated that a model based on a network of excitable elements with dynamical synapses is able to exhibit self-organized criticality for a wide range of the parameter\'s space. Our results are consistent with other studies that suggest short-term synaptic depression is enough to produce criticality in neuronal avalanches. However, according to several researchers, in spite of the tuning to be gross to ensure that there is criticality in the model, it is more accurate do not say that the system presents genuine self-organized criticality, but self-organized quasi-criticality as the other non-conservative models in the literature.
Advisors/Committee Members: Kinouchi Filho, Osame.
Subjects/Keywords: avalanches neuronais; criticalidade auto-organizada; neuronal avalanches; self-organized criticality
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APA (6th Edition):
Costa, A. d. A. (2011). Quasi-criticalidade auto-organizada em avalanches neuronais. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/59/59135/tde-17112011-204509/ ;
Chicago Manual of Style (16th Edition):
Costa, Ariadne de Andrade. “Quasi-criticalidade auto-organizada em avalanches neuronais.” 2011. Masters Thesis, University of São Paulo. Accessed February 29, 2020.
http://www.teses.usp.br/teses/disponiveis/59/59135/tde-17112011-204509/ ;.
MLA Handbook (7th Edition):
Costa, Ariadne de Andrade. “Quasi-criticalidade auto-organizada em avalanches neuronais.” 2011. Web. 29 Feb 2020.
Vancouver:
Costa AdA. Quasi-criticalidade auto-organizada em avalanches neuronais. [Internet] [Masters thesis]. University of São Paulo; 2011. [cited 2020 Feb 29].
Available from: http://www.teses.usp.br/teses/disponiveis/59/59135/tde-17112011-204509/ ;.
Council of Science Editors:
Costa AdA. Quasi-criticalidade auto-organizada em avalanches neuronais. [Masters Thesis]. University of São Paulo; 2011. Available from: http://www.teses.usp.br/teses/disponiveis/59/59135/tde-17112011-204509/ ;
Texas A&M University
21.
Pritchard, Megan L.
Characterization Methodology for Decommissioning Low and Intermediate Level Fissile Nuclide Contaminated Buried Soils and Process Piping Using Photon Counting.
Degree: 2014, Texas A&M University
URL: http://hdl.handle.net/1969.1/152805
► A new approach to- and method for characterization of fissile nuclide contaminated soils and process piping has been developed and implemented for low and intermediate…
(more)
▼ A new approach to- and method for characterization of fissile nuclide
contaminated soils and process piping has been developed and implemented for low and
intermediate level wastes, using new calibration bases for photon counting. The method
has been validated by integrating the capabilities of MCNP5 and ISOCS for a LaBr
scintillator detector in combination with known radioactive standards. In addition, the
developed methods consider nuclear safety as the priority while retaining realistic fissile
mass and enrichment estimation techniques.
The impact of a quick, portable non-destructive assay process to the
decommissioning and remediation arena is extremely valuable. Traditional methods have
inherent limitations in time consumption, resources, stability, and rigidity. In addition to
optimizing a material blending and storage program, gaining a real-time understanding to
the nature of fissile material prior to disturbance aids a nuclear safety program and culture
invaluably.
In this dissertation, detailed detector-waste models were developed and utilized to
create a quick uranium mass and enrichment estimation process by taking advantage of
the resolution and discrimination capabilities of the LaBr equipped InSpector 1000
instrument. The analysis takes into account multiple possible scenarios that may be
encountered during decommissioning and remediation of a fuel fabrication and buried
nuclear waste facility, while keeping nuclear safety controls in mind.
As an inherent part of the process, the models were validated by performing a series of code-to-software and software-to-standard benchmarking procedures, which provided substantiation for use of the detector for the derived purposes, in addition to ensuring that the Monte Carlo-based calibration approach was conservative, as compared to other methods.
The scenarios analyzed for the calibration basis were selected based on historical knowledge and in-field experience at the Westinghouse Hematite Decommissioning Project.
The techniques developed in this dissertation offer a new characterization method for fissile material quantity and enrichment with a portable, passive non-destructive gamma assay system without relying on continual macroscopic system analysis. In addition, it provides early detection of large quantities of fissile material prior to exhumation or disturbance to enhance nuclear safety processes. This places the first priority on nuclear and radiological safety while preserving the time and money saving aspects of production-based projects.
Advisors/Committee Members: Tsvetkov, Pavel (advisor), McDeavitt, Sean (committee member), Marianno, Craig (committee member), Horvat, Vladimir (committee member), Allen, Donald (committee member).
Subjects/Keywords: LaBr detector; nuclear criticality safety; nuclide characterization; Monte Carlo; gamma spectroscopy
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APA (6th Edition):
Pritchard, M. L. (2014). Characterization Methodology for Decommissioning Low and Intermediate Level Fissile Nuclide Contaminated Buried Soils and Process Piping Using Photon Counting. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152805
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pritchard, Megan L. “Characterization Methodology for Decommissioning Low and Intermediate Level Fissile Nuclide Contaminated Buried Soils and Process Piping Using Photon Counting.” 2014. Thesis, Texas A&M University. Accessed February 29, 2020.
http://hdl.handle.net/1969.1/152805.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pritchard, Megan L. “Characterization Methodology for Decommissioning Low and Intermediate Level Fissile Nuclide Contaminated Buried Soils and Process Piping Using Photon Counting.” 2014. Web. 29 Feb 2020.
Vancouver:
Pritchard ML. Characterization Methodology for Decommissioning Low and Intermediate Level Fissile Nuclide Contaminated Buried Soils and Process Piping Using Photon Counting. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/1969.1/152805.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pritchard ML. Characterization Methodology for Decommissioning Low and Intermediate Level Fissile Nuclide Contaminated Buried Soils and Process Piping Using Photon Counting. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/152805
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Edinburgh
22.
Hernandez-Urbina, Jose Victor.
Self-organised criticality via retro-synaptic signals in complex neural networks.
Degree: PhD, 2016, University of Edinburgh
URL: http://hdl.handle.net/1842/20468
► The brain is a complex system par excellence. Its intricate structure has become clearer recently, and it has been reported that it shares some properties…
(more)
▼ The brain is a complex system par excellence. Its intricate structure has become clearer recently, and it has been reported that it shares some properties common to complex networks, such as the small-world property, the presence of hubs, and assortative mixing, among others. These properties provide the brain with a robust architecture appropriate for efficient information transmission across different brain regions. Nevertheless, how these topological properties emerge in neural networks is still an open question. Moreover, in the last decade the observation of neuronal avalanches in neocortical circuits suggested the presence of self-organised criticality in neural systems. The occurrence of this kind of dynamics implies several benefits to neural computation. However, the mechanisms that give rise to critical behaviour in these systems, and how they interact with other neuronal processes such as synaptic plasticity are not fully understood. In this thesis, we study self-organised criticality and neural systems in the context of complex networks. Our work differs from other similar approaches by stressing the importance of analysing the influence of hubs, high clustering coefficients, and synaptic plasticity into the collective dynamics of the system. Additionally, we introduce a metric that we call node success to assess the effectiveness of a spike in terms of its capacity to trigger cascading behaviour. We present a synaptic plasticity rule based on this metric, which enables the system to reach the critical state of its collective dynamics without the need to fine-tune any control parameter. Our results suggest that retro-synaptic signals could be responsible for the emergence of self-organised criticality in brain networks. Furthermore, based on the measure of node success, we find what kind of topology allows nodes to be more successful at triggering cascades of activity. Our study comprises four different scenarios: i) static synapses, ii) dynamic synapses under spike-timing-dependent plasticity (STDP), iii) dynamic synapses under node-success-driven plasticity (NSDP), and iv) dynamic synapses under both NSDP and STDP mechanisms. We observe that small-world structures emerge when critical dynamics are combined with STDP mechanisms in a particular type of topology. Moreover, we go beyond simple spike pairs of STDP, and implement spike triplets to assess their influence on the dynamics of the system. To the best of our knowledge this is the first study that implements this version of STDP in the context of critical dynamics in complex networks.
Subjects/Keywords: 006.3; self-organised criticality; synaptic plasticity; complex networks; neural networks
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APA (6th Edition):
Hernandez-Urbina, J. V. (2016). Self-organised criticality via retro-synaptic signals in complex neural networks. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/20468
Chicago Manual of Style (16th Edition):
Hernandez-Urbina, Jose Victor. “Self-organised criticality via retro-synaptic signals in complex neural networks.” 2016. Doctoral Dissertation, University of Edinburgh. Accessed February 29, 2020.
http://hdl.handle.net/1842/20468.
MLA Handbook (7th Edition):
Hernandez-Urbina, Jose Victor. “Self-organised criticality via retro-synaptic signals in complex neural networks.” 2016. Web. 29 Feb 2020.
Vancouver:
Hernandez-Urbina JV. Self-organised criticality via retro-synaptic signals in complex neural networks. [Internet] [Doctoral dissertation]. University of Edinburgh; 2016. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/1842/20468.
Council of Science Editors:
Hernandez-Urbina JV. Self-organised criticality via retro-synaptic signals in complex neural networks. [Doctoral Dissertation]. University of Edinburgh; 2016. Available from: http://hdl.handle.net/1842/20468
University of New Mexico
23.
Miller, John Anthony.
Characterizations of plutonium nitrate solutions for criticality calculations.
Degree: Nuclear Engineering, 2011, University of New Mexico
URL: http://hdl.handle.net/1928/14545
► In the modeling of plutonium nitrate systems for criticality calculations, the chemical formula is usually assumed to be Pu(N03)4 (where plutonium is in the +4…
(more)
▼ In the modeling of plutonium nitrate systems for
criticality calculations, the chemical formula is usually assumed to be Pu(N03)4 (where plutonium is in the +4 valence state). However in a unique situation of chemistry, plutonium has four oxidation states (III), (IV), (V), and (VI) that can exist in finite concentrations, simultaneously in aqueous solutions, in equilibrium with each other.
Advisors/Committee Members: Busch, Robert D., Mead, Richard W..
Subjects/Keywords: Plutonium.; Criticality (Nuclear engineering) – Measurement; Radioactive wastes – Characterization
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APA (6th Edition):
Miller, J. A. (2011). Characterizations of plutonium nitrate solutions for criticality calculations. (Masters Thesis). University of New Mexico. Retrieved from http://hdl.handle.net/1928/14545
Chicago Manual of Style (16th Edition):
Miller, John Anthony. “Characterizations of plutonium nitrate solutions for criticality calculations.” 2011. Masters Thesis, University of New Mexico. Accessed February 29, 2020.
http://hdl.handle.net/1928/14545.
MLA Handbook (7th Edition):
Miller, John Anthony. “Characterizations of plutonium nitrate solutions for criticality calculations.” 2011. Web. 29 Feb 2020.
Vancouver:
Miller JA. Characterizations of plutonium nitrate solutions for criticality calculations. [Internet] [Masters thesis]. University of New Mexico; 2011. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/1928/14545.
Council of Science Editors:
Miller JA. Characterizations of plutonium nitrate solutions for criticality calculations. [Masters Thesis]. University of New Mexico; 2011. Available from: http://hdl.handle.net/1928/14545
University of Minnesota
24.
Huff.
Enhancing food defense: risk managers' perceptions, criticality assessments, and a novel method for objectively determining food systems' criticality.
Degree: PhD, Environmental Health, 2014, University of Minnesota
URL: http://hdl.handle.net/11299/163766
► This research focused on evaluating the perceptions of food defense risk management by state officials, evaluating the validity of a criticality assessment created by the…
(more)
▼ This research focused on evaluating the perceptions of food defense risk management by state officials, evaluating the validity of a criticality assessment created by the National Center for Food Protection and Defense (NCFPD), and developing a new geographic information system (GIS) based criticality assessment method. Specific objectives included: (1) investigating and reporting the history of food and agriculture criticality assessments; (2) conducting a survey to identify state officials' risk perceptions related to food and agriculture criticality; (3) analyzing the data collected by the most widely used criticality assessment method (i.e., Food and Agriculture Systems Criticality Assessment Tool); and, (4) developing a new method to objectively measure food system criticality.
Subjects/Keywords: Criticality; Food defense; Food systems; Risk; Risk analysis; Terrorism
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APA (6th Edition):
Huff. (2014). Enhancing food defense: risk managers' perceptions, criticality assessments, and a novel method for objectively determining food systems' criticality. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/163766
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
Huff. “Enhancing food defense: risk managers' perceptions, criticality assessments, and a novel method for objectively determining food systems' criticality.” 2014. Doctoral Dissertation, University of Minnesota. Accessed February 29, 2020.
http://hdl.handle.net/11299/163766.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
Huff. “Enhancing food defense: risk managers' perceptions, criticality assessments, and a novel method for objectively determining food systems' criticality.” 2014. Web. 29 Feb 2020.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
Huff. Enhancing food defense: risk managers' perceptions, criticality assessments, and a novel method for objectively determining food systems' criticality. [Internet] [Doctoral dissertation]. University of Minnesota; 2014. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/11299/163766.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
Huff. Enhancing food defense: risk managers' perceptions, criticality assessments, and a novel method for objectively determining food systems' criticality. [Doctoral Dissertation]. University of Minnesota; 2014. Available from: http://hdl.handle.net/11299/163766
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
University of Southern California
25.
Ding, Letian.
Entanglement in quantum critical and topological
phases.
Degree: PhD, Physics, 2010, University of Southern California
URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/348937/rec/2386
► In this dissertation, we studied quantum entanglement in the context of many-body physics. Based on quasi-free bipartite fermionic models, we were able to study the…
(more)
▼ In this dissertation, we studied quantum entanglement
in the context of many-body physics. Based on quasi-free bipartite
fermionic models, we were able to study the entanglement entropy
and its spectrum in various quantum phases. Particularly, we
studied the p wave superconducting paring states, which contain
quantum critical phases with different Fermi surface topology, and
we also studied the px+ ipy wave superconducting paring states,
which contain not only quantum critical phases but also quantum
topological phases.; In the p wave superconducting states, we
investigated the scaling behavior of entanglement entropy of a
general quadratic fermionic Hamiltonian in higher dimensions. The
three distinguished phases in these systems are a non-critical
phase, a critical phase with a finite Fermi surface and a critical
phase with only nodal fermion points. With the help of exact
diagonalization, we were able to calculate the entanglement entropy
with a very high precision. In non-critical states we found that
the area law indeed holds, and logarithmic corrections to the area
law are present in critical states with a finite Fermi surface. For
critical states with only nodal Fermi points, we found that the
logarithmic corrections to the area law are absent.; We also worked
out a bound of the entanglement entropy for a generic bipartite
fermion system using an analytic method. It was found that for
states with a finite Fermi surface, the entanglement entropy in the
system shows violation of the area law with a logarithmic
correction. And for other critical systems and the fully gapped
systems, the lower bound of the block entropy still obeys an area
law. Our study gives clear evidence that the relationship between
entanglement and correlations in higher dimensional systems is
different than in d=1, and that a crucial role is played by the
geometry of the Fermi surface.; In the px+ ipy wave superconducting
paring states,we investigated topological order with parity and
time-reversal symmetry breaking. Large-scale numerical calculations
of the entanglement spectrum and entanglement entropy reveal
universal behavior in these systems. In particular, we found a
chiral, gapless Majorana fermion excitation in the entanglement
spectrum of the weak-pairing phase, and contrasted this with the
gapped spectrum in the strong-pairing phase. A variety of
topological phases can be described by a pairing Hamiltonian that
neglects order parameter fluctuations. Our studies also confirmed
the corner effects in the sub-leading term of the entanglement
entropy. Additional to entanglement entropy, we also found that the
entanglement spectrum provides an alternative robust way to detect
and characterize non-Abelian topological order in the ground-state
wavefunction of such phases. We found in non-Abelian topological
phases, the power-law decay of the lowest eigenvalue in the
entanglement spectrum carries the information for the hidden order
in the system.
Advisors/Committee Members: Haas, Stephan W. (Committee Chair), Bickers, Nelson (Committee Member), Nakano, Aiichiro (Committee Member), Däppen, Werner (Committee Member), Zhang, Jianfeng (Committee Member).
Subjects/Keywords: entanglement entropy; entanglement spectrum; quantum criticality; quantum entanglement; topological phases
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APA (6th Edition):
Ding, L. (2010). Entanglement in quantum critical and topological
phases. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/348937/rec/2386
Chicago Manual of Style (16th Edition):
Ding, Letian. “Entanglement in quantum critical and topological
phases.” 2010. Doctoral Dissertation, University of Southern California. Accessed February 29, 2020.
http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/348937/rec/2386.
MLA Handbook (7th Edition):
Ding, Letian. “Entanglement in quantum critical and topological
phases.” 2010. Web. 29 Feb 2020.
Vancouver:
Ding L. Entanglement in quantum critical and topological
phases. [Internet] [Doctoral dissertation]. University of Southern California; 2010. [cited 2020 Feb 29].
Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/348937/rec/2386.
Council of Science Editors:
Ding L. Entanglement in quantum critical and topological
phases. [Doctoral Dissertation]. University of Southern California; 2010. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/348937/rec/2386
Robert Gordon University
26.
Buwert, Peter.
Ethical design : a foundation for visual communication.
Degree: PhD, 2016, Robert Gordon University
URL: http://hdl.handle.net/10059/1577
► The central original contribution to knowledge proposed by this thesis is the setting forth of a conceptualisation of ethical theory specifically in relation to design,…
(more)
▼ The central original contribution to knowledge proposed by this thesis is the setting forth of a conceptualisation of ethical theory specifically in relation to design, with a focus on visual communication design. Building on earlier work by design theorist Clive Dilnot in the area of design ethics and on philosopher Giorgio Agamben’s formulation of the philosophical concept of potentiality, a way of thinking about the relationship between design and ethics is proposed which concludes that design is in fact always inherently ethical. However, this conception of ethical design purposefully leaves questions of the qualification of good and bad unresolved, stating only that the ethical is the prerequisite condition in which both good and bad become possibilities. Design’s significantly unethical capability to suppress and anaesthetise individuals’ ethical experience is highlighted through a proposal of a process of an/aesth/ethics. Observation of the relationship between design and ethics in the real world through a series of interviews demonstrates something of the complexity of design’s relationship with ethics and the diverse range of positions, beliefs, attitudes and paradoxes abounding within the design profession when it comes to addressing the question of “good” design practice. Six “sites” of ethics within contemporary design discourse are introduced and discussed. The ethicality of design practices in relation to these sites are then analysed through the lens of the proposed ethical framework: identifying strengths, weaknesses and potentials within these observed strategies. The way of thinking about ethical design proposed here demonstrates potential in contributing to designers’ ability to critically consider the ethicality of their own practices. From this foundation they may be better equipped to begin addressing the question of the qualification of the “goodness” of design. In conclusion, proposals are made for how this framework could be practically developed and used to support and encourage ethical design in the real world.
Subjects/Keywords: 741.6; Aesthetics; An/Aesth/Ethics; Criticality; Ethics; Graphic design; Potentiality
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APA (6th Edition):
Buwert, P. (2016). Ethical design : a foundation for visual communication. (Doctoral Dissertation). Robert Gordon University. Retrieved from http://hdl.handle.net/10059/1577
Chicago Manual of Style (16th Edition):
Buwert, Peter. “Ethical design : a foundation for visual communication.” 2016. Doctoral Dissertation, Robert Gordon University. Accessed February 29, 2020.
http://hdl.handle.net/10059/1577.
MLA Handbook (7th Edition):
Buwert, Peter. “Ethical design : a foundation for visual communication.” 2016. Web. 29 Feb 2020.
Vancouver:
Buwert P. Ethical design : a foundation for visual communication. [Internet] [Doctoral dissertation]. Robert Gordon University; 2016. [cited 2020 Feb 29].
Available from: http://hdl.handle.net/10059/1577.
Council of Science Editors:
Buwert P. Ethical design : a foundation for visual communication. [Doctoral Dissertation]. Robert Gordon University; 2016. Available from: http://hdl.handle.net/10059/1577
The Ohio State University
27.
Abejon Orzaez, Jorge.
Neutronics analysis of a modified Pebble Bed Advanced High
Temperature Reactor.
Degree: MS, Nuclear Engineering, 2009, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1238045558
► The objective of this research is to, based on the original design for the Pebble Bed Advanced High Temperature Reactor (PB-AHTR), develop an MCNPX model…
(more)
▼ The objective of this research is to, based on the
original design for the Pebble Bed Advanced High Temperature
Reactor (PB-AHTR), develop an MCNPX model of the reactor core with
the objective to attain
criticality and to breed new fuel. A brief
but complete description of a first approach to the PB-AHTR will be
provided and a MCNPX model will be run in order to ascertain the
difficulties of that configuration. On the second part, a
modification of the original model will be evaluated and compared
in order to resolve the difficulties encountered in the original
design. Finally, in an effort to optimize the design, an
evolutionary approach will be analyzed, based on the previous
model, and conclusions will be attained
Advisors/Committee Members: Blue, Thomas (Committee Chair), Sun, Xiaodong (Committee Co-Chair).
Subjects/Keywords: Engineering; Nuclear Physics; Neutronics; advanced high temperature reactor; criticality
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APA (6th Edition):
Abejon Orzaez, J. (2009). Neutronics analysis of a modified Pebble Bed Advanced High
Temperature Reactor. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1238045558
Chicago Manual of Style (16th Edition):
Abejon Orzaez, Jorge. “Neutronics analysis of a modified Pebble Bed Advanced High
Temperature Reactor.” 2009. Masters Thesis, The Ohio State University. Accessed February 29, 2020.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1238045558.
MLA Handbook (7th Edition):
Abejon Orzaez, Jorge. “Neutronics analysis of a modified Pebble Bed Advanced High
Temperature Reactor.” 2009. Web. 29 Feb 2020.
Vancouver:
Abejon Orzaez J. Neutronics analysis of a modified Pebble Bed Advanced High
Temperature Reactor. [Internet] [Masters thesis]. The Ohio State University; 2009. [cited 2020 Feb 29].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1238045558.
Council of Science Editors:
Abejon Orzaez J. Neutronics analysis of a modified Pebble Bed Advanced High
Temperature Reactor. [Masters Thesis]. The Ohio State University; 2009. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1238045558
University of Tennessee – Knoxville
28.
Taylor, Richard Gordon.
Characteristics of Thick Concrete Neutron Reflection.
Degree: 2016, University of Tennessee – Knoxville
URL: https://trace.tennessee.edu/utk_graddiss/4173
► Water is considered as a neutron reflector in nuclear criticality safety evaluations because it is readily available and easily forms a close-fitting shape around fissile…
(more)
▼ Water is considered as a neutron reflector in nuclear criticality safety evaluations because it is readily available and easily forms a close-fitting shape around fissile material. Concrete is commonly encountered industrial environments and can be a more effective reflector than water. Nuclear criticality safety literature reporting experimental and analytical studies involving concrete as a reflector from the 1950’s to the present was reviewed. Nuclear criticality safety community perspective on concrete reflection has evolved from acknowledgement that concrete is a reflector through recognition that concrete can be a more effective reflector than water to current interest in identifying which constituents are most important. Concrete reflection work that has been done tends to be limited in several ways. Studies usually consider only a few concrete compositions from a relatively large number available. Studies have also tended to consider a limited number of fissile material moderation ranges, typically unmoderated and the moderation for minimum mass or volume criticality, or only very specific material arrangements. Most analytical studies evaluate systems as infinite extent slab arrangements.
To address these limitations and evolving current interest, a comprehensive study using 32 concrete compositions derived from the literature survey was done for the three basic one-dimensional geometries used in radiation transport codes: spherical, infinite length cylindrical, and infinite extent slab geometries using a 235U [uranium-235] metal/water fissile mixture. The concentration/moderation range over which criticality is possible was spanned, and the change in keff [k-effective] per unit change in element atomic number density values, Δkeff/ΔN, [delta k-effective/delta N] for various concrete composition elements was computed to determine the relative effect of each element on neutron multiplication.
These results will be useful to nuclear criticality safety practitioners in several ways. Some control can be exercised over concrete constituents and the results can be used to guide material selections during project design to minimize positive contributions to keff. For existing installations, if the concrete composition is known, the results will permit some ranking of its effectiveness relative to water. For technical studies, conservative conditions that maximize keff are generally preferred and the results will help guide constituent selections.
Subjects/Keywords: nuclear criticality safety; concrete; sensitivity coefficient; Nuclear Engineering
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Manager
APA (6th Edition):
Taylor, R. G. (2016). Characteristics of Thick Concrete Neutron Reflection. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/4173
Chicago Manual of Style (16th Edition):
Taylor, Richard Gordon. “Characteristics of Thick Concrete Neutron Reflection.” 2016. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed February 29, 2020.
https://trace.tennessee.edu/utk_graddiss/4173.
MLA Handbook (7th Edition):
Taylor, Richard Gordon. “Characteristics of Thick Concrete Neutron Reflection.” 2016. Web. 29 Feb 2020.
Vancouver:
Taylor RG. Characteristics of Thick Concrete Neutron Reflection. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2016. [cited 2020 Feb 29].
Available from: https://trace.tennessee.edu/utk_graddiss/4173.
Council of Science Editors:
Taylor RG. Characteristics of Thick Concrete Neutron Reflection. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2016. Available from: https://trace.tennessee.edu/utk_graddiss/4173
University of Tennessee – Knoxville
29.
Marshall, William Jay.
DETERMINATION OF CRITICAL EXPERIMENT CORRELATIONS VIA THE MONTE CARLO SAMPLING TECHNIQUE.
Degree: 2017, University of Tennessee – Knoxville
URL: https://trace.tennessee.edu/utk_graddiss/4750
► Critical benchmark experiments are the foundation of validation of the computational codes used in criticality safety analyses because they provide a basis for comparison between…
(more)
▼ Critical benchmark experiments are the foundation of validation of the computational codes used in criticality safety analyses because they provide a basis for comparison between the calculated results and the physical world. These experiments are often performed in series varying a limited number of parameters to isolate the effect of the independent parameter. The use of common materials, geometries, machines, procedures, detectors, or other shared features can create correlations among the resulting experiments. Most validation techniques used in criticality safety practice do not treat these correlations explicitly, and the effect of this is unclear as the correlations themselves are not well known. Generalized linear least squares methods used for advanced validation or in data adjustment studies also rely on correlation coefficients to constrain the adjustments allowed in critical experiment results. The purpose of this dissertation is to develop a methodology for the calculation of critical experiment correlations using a Monte Carlo sampling technique. The use of this technique allows for the determination of the uncertainty in each individual experiment, and identical perturbations applied to shared parameters provide estimates of the covariance between the experiments. The correlation coefficient is then calculated by dividing the covariance between any pair of experiments by the product of the individual experiment standard deviations. This technique is applied to high-enriched uranium solution experiments and low-enriched uranium pin lattice experiments to determine correlation coefficients for these types of systems. The important parameters governing the correlation coefficients are determined, and the results are compared with correlation coefficients in the literature determined using other methods at other institutions. The general method for the determination of the correlation coefficients is presented along with other conclusions and recommendations for further study in this area.
Subjects/Keywords: criticality safety; validation; critical experiments; correlations; Nuclear Engineering
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Marshall, W. J. (2017). DETERMINATION OF CRITICAL EXPERIMENT CORRELATIONS VIA THE MONTE CARLO SAMPLING TECHNIQUE. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/4750
Chicago Manual of Style (16th Edition):
Marshall, William Jay. “DETERMINATION OF CRITICAL EXPERIMENT CORRELATIONS VIA THE MONTE CARLO SAMPLING TECHNIQUE.” 2017. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed February 29, 2020.
https://trace.tennessee.edu/utk_graddiss/4750.
MLA Handbook (7th Edition):
Marshall, William Jay. “DETERMINATION OF CRITICAL EXPERIMENT CORRELATIONS VIA THE MONTE CARLO SAMPLING TECHNIQUE.” 2017. Web. 29 Feb 2020.
Vancouver:
Marshall WJ. DETERMINATION OF CRITICAL EXPERIMENT CORRELATIONS VIA THE MONTE CARLO SAMPLING TECHNIQUE. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2017. [cited 2020 Feb 29].
Available from: https://trace.tennessee.edu/utk_graddiss/4750.
Council of Science Editors:
Marshall WJ. DETERMINATION OF CRITICAL EXPERIMENT CORRELATIONS VIA THE MONTE CARLO SAMPLING TECHNIQUE. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2017. Available from: https://trace.tennessee.edu/utk_graddiss/4750
University of Sydney
30.
Munn, Brandon Robert.
Critical Spatiotemporal Dynamics of the Brain’s Endogenous Activity and its Natural Stimuli
.
Degree: University of Sydney
URL: https://ses.library.usyd.edu.au/handle/2123/21452
► The endogenous activity and natural sensory input of the brain are rich in spatiotemporal dynamics. It has been hypothesised that the brain maintains an internal…
(more)
▼ The endogenous activity and natural sensory input of the brain are rich in spatiotemporal dynamics. It has been hypothesised that the brain maintains an internal model that is optimally adapted to the statistical properties of its environment to facilitate efficient processing. However, the universal statistics of endogenous neural dynamics and spatiotemporal natural stimuli remain unclear. In this thesis, we investigate the collective statistical properties of natural time-varying images, individual neuronal spiking activity, and collective macroscale neural activity. We analyse an ensemble of natural time-varying images recorded using a neuromorphic camera from the perspective of their spatiotemporal patterns and find evidence of dynamical thermodynamic criticality with critical dynamics belonging to the universality class of directed percolation. We then analyse spiking activity in subcortical and cortical visual areas. We find fractal spiking is prevalent across the early visual system and that it is intrinsically linked to a neurons population coupling. We reproduce this spiking activity relationship using a fractal inhomogeneous Poisson process and establish a unified account of dynamic spiking properties in the visual pathway. We also analyse multielectrode cortical recordings and demonstrate the coexistence of neuronal avalanches and LFP patterns. Neuronal avalanches are scale-free bursts of neuronal activity separated by periods of quiescence that are a signature of criticality within the brain. The low-frequency LFP patterns consist of simple travelling waves and complex radial patterns, whereas, at high-frequency, the patterns consist of localised bursts of activity. We demonstrate a mechanism by which the evolution of the LFP patterns coordinates spikes to form scale-free neural activity. Thus, our results indicate that the brain maintains an internal model with rich critical dynamics that match that of its environment for efficient representations.
Subjects/Keywords: criticality;
natural;
images;
directed;
percolation
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APA (6th Edition):
Munn, B. R. (n.d.). Critical Spatiotemporal Dynamics of the Brain’s Endogenous Activity and its Natural Stimuli
. (Thesis). University of Sydney. Retrieved from https://ses.library.usyd.edu.au/handle/2123/21452
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Munn, Brandon Robert. “Critical Spatiotemporal Dynamics of the Brain’s Endogenous Activity and its Natural Stimuli
.” Thesis, University of Sydney. Accessed February 29, 2020.
https://ses.library.usyd.edu.au/handle/2123/21452.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Munn, Brandon Robert. “Critical Spatiotemporal Dynamics of the Brain’s Endogenous Activity and its Natural Stimuli
.” Web. 29 Feb 2020.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Vancouver:
Munn BR. Critical Spatiotemporal Dynamics of the Brain’s Endogenous Activity and its Natural Stimuli
. [Internet] [Thesis]. University of Sydney; [cited 2020 Feb 29].
Available from: https://ses.library.usyd.edu.au/handle/2123/21452.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
Council of Science Editors:
Munn BR. Critical Spatiotemporal Dynamics of the Brain’s Endogenous Activity and its Natural Stimuli
. [Thesis]. University of Sydney; Available from: https://ses.library.usyd.edu.au/handle/2123/21452
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
◁ [1] [2] [3] [4] [5] [6] [7] [8] [9] ▶
. 
Open Access Theses and Dissertations