subject:(Scaling laws Statistical physics )

Michigan State University

1. Ventimiglia, David A. Coping with scatter in galaxy cluster scaling relationships.

Degree: 2012, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:1306

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Thesis Ph. D. Michigan State University. Astrophysics and Astronomy 2012.

Galaxy clusters exhibit regular scaling relations among their bulkproperties, establishing vital links between halo mass… (more)

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Thesis Ph. D. Michigan State University. Astrophysics and Astronomy 2012.

Galaxy clusters exhibit regular scaling relations among their bulkproperties, establishing vital links between halo mass and clusterobservables. Therefore, precision cosmology studies depending on theselinks benefit from a better understanding of scatter in themass-observable scaling relations. Here, we study the role of mergerprocesses in introducing scatter into the mass-temperature (M\mhyphenT_X) relation, using a sample of 121 galaxy clusters simulated withradiative cooling and supernova feedback, along with threemorphological statistics previously proposed to measure X-ray surfacebrightness substructure. These are the centroid variation (w), theaxial ratio (η), and the power ratios (P₂₀) andP₃₀). We also examine spectral statistics which do not requireimaging. In particular we look at the ratio of hardband to broadbandspectral-fit temperatures T_HBR, which is a measure of temperatureinhomogeneity inferred from X-ray spectral properties. We find thatin this set of simulated clusters, each substructure measure iscorrelated with a cluster's departures δ \ln T and δ \lnM from the mean M\mhyphen T_X relation, both for emission-weightedtemperatures T_EW and for spectroscopic-like temperaturesT_SL, in the sense that clusters with more substructure tend to becooler at a given halo mass. In all cases, a three-parameter fit tothe M\mhyphen T_X relation that includes substructure informationhas less scatter than a two-parameter fit to the basic M\mhyphen T_Xrelation. In this work we also test the effectiveness of T_HBR asa measure of scatter using the 118 galaxy clusters from our sample forwhich we have simulated X-ray images using the \xmas2 software. Wefind that, while T_HBR is correlated with clusters' departuresδ \ln M from the mean M\mhyphen T_X relation, the effect ismodest. Finally, we present the CosmoSurvey software for efficientlyevaluating simple flux-limited galaxy cluster survey models oncommodity hardware, and discuss possible extensions.

Description based on online resource; title from PDF t.p. (ProQuest, viewed Oct. 31, 2013)

Advisors/Committee Members: Voit, G. Mark, O'Shea, Brian, Zepf, Steve, Birge, Norman, Pratt, Scott.

Subjects/Keywords: Galaxies – Clusters; Scaling laws (Statistical physics); Statistical astronomy; Astrophysics

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APA (6^th Edition):

Ventimiglia, D. A. (2012). Coping with scatter in galaxy cluster scaling relationships. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:1306

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

Chicago Manual of Style (16^th Edition):

Ventimiglia, David A. “Coping with scatter in galaxy cluster scaling relationships.” 2012. Thesis, Michigan State University. Accessed January 22, 2021. http://etd.lib.msu.edu/islandora/object/etd:1306.

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

MLA Handbook (7^th Edition):

Ventimiglia, David A. “Coping with scatter in galaxy cluster scaling relationships.” 2012. Web. 22 Jan 2021.

Vancouver:

Ventimiglia DA. Coping with scatter in galaxy cluster scaling relationships. [Internet] [Thesis]. Michigan State University; 2012. [cited 2021 Jan 22]. Available from: http://etd.lib.msu.edu/islandora/object/etd:1306.

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

Council of Science Editors:

Ventimiglia DA. Coping with scatter in galaxy cluster scaling relationships. [Thesis]. Michigan State University; 2012. Available from: http://etd.lib.msu.edu/islandora/object/etd:1306

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

Rutgers University

2. Škatarić, Maja, 1986-. Scale invariance in biological systems.

Degree: PhD, Electrical and Computer Engineering, 2014, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/45463/

► In this dissertation we will discuss various techniques related to modeling and identification problems arising in complex biological networks, and demonstrate how control theory approaches… (more)

▼ In this dissertation we will discuss various techniques related to modeling and identification problems arising in complex biological networks, and demonstrate how control theory approaches can be used to validate mathematical models coming from exhaustive computational experiments or noisy experimental data. The methodology based on systematic exploration of the basic dynamic processes, feedback control loops, and signal processing mechanisms in complex networks or their parts provides powerful tools for guiding the reverse-engineering of networks, and allows one to design artificial systems that are capable of achieving various objectives. Adaptation is an essential property of many cellular systems and it means that the measured variables return to their basal levels after a transient response to a step increase in stimulus. By definition, neither the concepts of perfect nor approximate adaptation address the characteristics of the transient signaling which occurs prior to a return to steady state, which are physiologically relevant. It has been recently observed that some adapting systems, ranging from bacterial chemotaxis pathways to signal transduction mechanisms in eukaryotes exhibit an additional feature: scale invariance, meaning that transient behavior remains approximately the same when the background signal level is scaled. Recent interest in scale-invariance was triggered by a pair of papers published in 2009, in which scale-invariant behavior was experimentally observed in several highly conserved eukaryotic signaling pathways that play roles in embryonic patterning, stem cell homeostasis, cell division, and other central processes, and their misregulation results in diseases including several types of cancer. In this thesis we will review the biological phenomena of adaptation and scale invariance, and present the relevant mathematical results for several classes of systems that exhibit these properties. We will use a model from the literature which describes the class of enzyme networks, to prove the impossibility of perfect scale invariance, and develop the mechanism which gives rise to an approximate scale invariance. We will demonstrate results on a biological example of soil-living amoeba Dictyostelium discoideum. Additionally, it has been often remarked in the literature that certain systems whose output variables respond at a faster time scale than internal components, give rise to an approximate scale-invariant behavior. We will state a fundamental limitation of such a mechanism, showing that there is a minimal error that cannot be overcome, no matter how large the separation of time scales is. We will highlight the extensions and challenges in analyzing adaptation and scale-invariance in a stochastic setting. Finally, we will discuss the development of tools for the identification of time-varying parameters in nonhomogeneous Poisson processes, in applications where discrete measurements such as "spikes" or "tumbles" are observed from the behavior of free swimming… Advisors/Committee Members: Sontag, Eduardo (chair), Gajic, Zoran (internal member), Daut, David (internal member), Orfanidis, Sophocles (internal member), Baykal-Gursoy, Melike (outside member).

Subjects/Keywords: Scaling laws (Statistical physics); Control theory; Biological models

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APA (6^th Edition):

Škatarić, Maja, 1. (2014). Scale invariance in biological systems. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/45463/

Chicago Manual of Style (16^th Edition):

Škatarić, Maja, 1986-. “Scale invariance in biological systems.” 2014. Doctoral Dissertation, Rutgers University. Accessed January 22, 2021. https://rucore.libraries.rutgers.edu/rutgers-lib/45463/.

MLA Handbook (7^th Edition):

Škatarić, Maja, 1986-. “Scale invariance in biological systems.” 2014. Web. 22 Jan 2021.

Vancouver:

Škatarić, Maja 1. Scale invariance in biological systems. [Internet] [Doctoral dissertation]. Rutgers University; 2014. [cited 2021 Jan 22]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/45463/.

Council of Science Editors:

Škatarić, Maja 1. Scale invariance in biological systems. [Doctoral Dissertation]. Rutgers University; 2014. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/45463/

University of Oxford

3. Christou, Alexis. Dynamics on scale-invariant structures.

Degree: PhD, 1987, University of Oxford

URL: http://ora.ox.ac.uk/objects/uuid:15fd6e54-0ac4-4f4d-8115-0ee51ad74504 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379901

► We investigate dynamical processes on random and regular fractals. The (static) problem of percolation in the semi-infinite plane introduces many pertinent ideas including real space… (more)

▼ We investigate dynamical processes on random and regular fractals. The (static) problem of percolation in the semi-infinite plane introduces many pertinent ideas including real space renormalisation group (RSRG) fugacity transformations and scaling forms. We study the percolation probability to determine the surface critical behaviour and to establish exponent relations. The fugacity approach is generalised to study random walks on diffusion-limited aggregates (DLA). Using regular and random models, we calculate the walk dimensionality and demonstrate that it is consistent with a conjecture by Aharony and Stauffer. It is shown that the kinetically grown DLA is in a distinct dynamic universality class to lattice animals. Similarly, the speculation of Helman-Coniglio-Tsallis regarding diffusion on self-avoiding walks (SAWs) is shown to be incorrect. The results are corroborated by an exact enumeration analysis of the internal structure of SAWs. A 'spin' and field theoretic Hamiltonian formulation for the conformational and resistance properties of random walks is presented. We consider Gaussian random walks, SAWs, spiral SAWs and valence walks. We express resistive susceptibilities as correlation functions and hence e-expansions are calculated for the resistance exponents. For SAWs, the local crosslinks are shown to be irrelevant and we calculate corrections to scaling. A scaling description is introduced into an equation-of-motion method in order to study spin wave damping in d-dimensional isotropic Heisenberg ferro-, antiferro- and ferri- magnets near pc . Dynamic scaling is shown to be obeyed by the Lorentzian spin wave response function and lifetime. The ensemble of finite clusters and multicritical behaviour is also treated. In contrast, the relaxational dynamics of the dilute Anisotropic Heisenberg model is shown to violate conventional dynamic scaling near the percolation bicritical point but satisfies instead a singular scaling behaviour arising from activation of Bloch walls over percolation cluster energy barriers.

Subjects/Keywords: 510; Scaling laws (Statistical physics) : Fractals

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APA (6^th Edition):

Christou, A. (1987). Dynamics on scale-invariant structures. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:15fd6e54-0ac4-4f4d-8115-0ee51ad74504 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379901

Chicago Manual of Style (16^th Edition):

Christou, Alexis. “Dynamics on scale-invariant structures.” 1987. Doctoral Dissertation, University of Oxford. Accessed January 22, 2021. http://ora.ox.ac.uk/objects/uuid:15fd6e54-0ac4-4f4d-8115-0ee51ad74504 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379901.

MLA Handbook (7^th Edition):

Christou, Alexis. “Dynamics on scale-invariant structures.” 1987. Web. 22 Jan 2021.

Vancouver:

Christou A. Dynamics on scale-invariant structures. [Internet] [Doctoral dissertation]. University of Oxford; 1987. [cited 2021 Jan 22]. Available from: http://ora.ox.ac.uk/objects/uuid:15fd6e54-0ac4-4f4d-8115-0ee51ad74504 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379901.

Council of Science Editors:

Christou A. Dynamics on scale-invariant structures. [Doctoral Dissertation]. University of Oxford; 1987. Available from: http://ora.ox.ac.uk/objects/uuid:15fd6e54-0ac4-4f4d-8115-0ee51ad74504 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379901

Virginia Tech

4. Wong, Shiu-Hon. A comparison of two scaling procedures in paired-comparison experiments involving ties.

Degree: MS, Statistics, 1960, Virginia Tech

URL: http://hdl.handle.net/10919/45583

► A recently-proposed modification of the Thurstone- Mosteller method of paired comparisons makes possible the analysis of data involving tied observations. The modification includes the… (more)

Subjects/Keywords: Scaling laws (Statistical physics); LD5655.V855 1960.W664

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APA (6^th Edition):

Wong, S. (1960). A comparison of two scaling procedures in paired-comparison experiments involving ties. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/45583

Chicago Manual of Style (16^th Edition):

Wong, Shiu-Hon. “A comparison of two scaling procedures in paired-comparison experiments involving ties.” 1960. Masters Thesis, Virginia Tech. Accessed January 22, 2021. http://hdl.handle.net/10919/45583.

MLA Handbook (7^th Edition):

Wong, Shiu-Hon. “A comparison of two scaling procedures in paired-comparison experiments involving ties.” 1960. Web. 22 Jan 2021.

Vancouver:

Wong S. A comparison of two scaling procedures in paired-comparison experiments involving ties. [Internet] [Masters thesis]. Virginia Tech; 1960. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/10919/45583.

Council of Science Editors:

Wong S. A comparison of two scaling procedures in paired-comparison experiments involving ties. [Masters Thesis]. Virginia Tech; 1960. Available from: http://hdl.handle.net/10919/45583

University of British Columbia

5. Ladak, Al-Karim Madatally. Resampling-based variance estimators in ratio estimation with application to weigh scaling.

Degree: MS- MSc, Statistics, 1990, University of British Columbia

URL: http://hdl.handle.net/2429/29195

► Weigh scaling is a method of estimating the total volume of timber harvested from a given region. The implementation of statistical sampling techniques in weigh… (more)

Subjects/Keywords: Forests and forestry – Measurement; Scaling laws (Statistical physics)

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APA (6^th Edition):

Ladak, A. M. (1990). Resampling-based variance estimators in ratio estimation with application to weigh scaling. (Masters Thesis). University of British Columbia. Retrieved from http://hdl.handle.net/2429/29195

Chicago Manual of Style (16^th Edition):

Ladak, Al-Karim Madatally. “Resampling-based variance estimators in ratio estimation with application to weigh scaling.” 1990. Masters Thesis, University of British Columbia. Accessed January 22, 2021. http://hdl.handle.net/2429/29195.

MLA Handbook (7^th Edition):

Ladak, Al-Karim Madatally. “Resampling-based variance estimators in ratio estimation with application to weigh scaling.” 1990. Web. 22 Jan 2021.

Vancouver:

Ladak AM. Resampling-based variance estimators in ratio estimation with application to weigh scaling. [Internet] [Masters thesis]. University of British Columbia; 1990. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/2429/29195.

Council of Science Editors:

Ladak AM. Resampling-based variance estimators in ratio estimation with application to weigh scaling. [Masters Thesis]. University of British Columbia; 1990. Available from: http://hdl.handle.net/2429/29195

Georgia Tech

6. Balaba, Davis. A methodology for rapid vehicle scaling and configuration space exploration.

Degree: PhD, Aerospace Engineering, 2009, Georgia Tech

URL: http://hdl.handle.net/1853/28234

► Drastic changes in aircraft operational requirements and the emergence of new enabling technologies often occur symbiotically with advances in technology inducing new requirements and vice… (more)

▼ Drastic changes in aircraft operational requirements and the emergence of new enabling technologies often occur symbiotically with advances in technology inducing new requirements and vice versa. These changes sometimes lead to the design of vehicle concepts for which no prior art exists. They lead to revolutionary concepts. In such cases the basic form of the vehicle geometry can no longer be determined through an ex ante survey of prior art as depicted by aircraft concepts in the historical domain. Ideally, baseline geometries for revolutionary concepts would be the result of exhaustive configuration space exploration and optimization. Numerous component layouts and their implications for the minimum external dimensions of the resultant vehicle would be evaluated. The dimensions of the minimum enclosing envelope for the best component layout(s) (as per the design need) would then be used as a basis for the selection of a baseline geometry. Unfortunately layout design spaces are inherently large and the key contributing analysis i.e. collision detection, can be very expensive as well. Even when an appropriate baseline geometry has been identified, another hurdle i.e. vehicle scaling has to be overcome. Through the design of a notional Cessna C-172R powered by a liquid hydrogen Proton Exchange Membrane (PEM) fuel cell, it has been demonstrated that the various forms of vehicle scaling i.e. photographic and historical-data-based scaling can result in highly sub-optimal results even for very small O(10-3) scale factors. There is therefore a need for higher fidelity vehicle scaling laws especially since emergent technologies tend to be volumetrically and/or gravimetrically constrained when compared to incumbents. The Configuration-space Exploration and Scaling Methodology (CESM) is postulated herein as a solution to the above-mentioned challenges. This bottom-up methodology entails the representation of component or sub-system geometries as matrices of points in 3D space. These typically large matrices are reduced using minimal convex sets or convex hulls. This reduction leads to significant gains in collision detection speed at minimal approximation expense. (The Gilbert-Johnson-Keerthi algorithm is used for collision detection purposes in this methodology.) Once the components are laid out, their collective convex hull (from here on out referred to as the super-hull) is used to approximate the inner mold line of the minimum enclosing envelope of the vehicle concept. A sectional slicing algorithm is used to extract the sectional dimensions of this envelope. An offset is added to these dimensions in order to come up with the sectional fuselage dimensions. Once the lift and control surfaces are added, vehicle level objective functions can be evaluated and compared to other designs. For each design, changes in the super-hull dimensions in response to perturbations in requirements can be tracked and regressed to create custom geometric scaling laws. The regressions are based on dimensionally consistent parameter groups… Advisors/Committee Members: Dr. Dimitri Mavris (Committee Chair), Dean Ward (Committee Member), Dr. Daniel Schrage (Committee Member), Dr. Danielle Soban (Committee Member), Dr. Sriram Rallabhandi (Committee Member), Mathias Emeneth (Committee Member).

Subjects/Keywords: Collision detection; Aircraft scaling laws; Disruptive technologies; Aircraft Configuration space exploration; Airplanes Design; Scaling laws (Statistical physics)

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APA (6^th Edition):

Balaba, D. (2009). A methodology for rapid vehicle scaling and configuration space exploration. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/28234

Chicago Manual of Style (16^th Edition):

Balaba, Davis. “A methodology for rapid vehicle scaling and configuration space exploration.” 2009. Doctoral Dissertation, Georgia Tech. Accessed January 22, 2021. http://hdl.handle.net/1853/28234.

MLA Handbook (7^th Edition):

Balaba, Davis. “A methodology for rapid vehicle scaling and configuration space exploration.” 2009. Web. 22 Jan 2021.

Vancouver:

Balaba D. A methodology for rapid vehicle scaling and configuration space exploration. [Internet] [Doctoral dissertation]. Georgia Tech; 2009. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/1853/28234.

Council of Science Editors:

Balaba D. A methodology for rapid vehicle scaling and configuration space exploration. [Doctoral Dissertation]. Georgia Tech; 2009. Available from: http://hdl.handle.net/1853/28234

Washington University in St. Louis

7. Liu, Pai. Contemporary Problems in Aerosol Aggregation and Gelation.

Degree: PhD, Energy, Environmental & Chemical Engineering, 2019, Washington University in St. Louis

URL: https://openscholarship.wustl.edu/eng_etds/496

► Aggregation of nanoparticles in aerosols is a fundamental phenomenon with important implications to diverse fields ranging from material synthesis to pollutant control. The past few… (more)

▼ Aggregation of nanoparticles in aerosols is a fundamental phenomenon with important implications to diverse fields ranging from material synthesis to pollutant control. The past few decades have witnessed extensive research on investigating the structure and growth mechanism of aerosol aggregates with sizes spanning across several orders of magnitude. This dissertation focuses on some contemporary problems that remain unaddressed in this topical area. Aerosol aggregates in sub-micron regimes, which are formed via the irreversible collision and aggregation of solid nanoparticle monomers, are fractal-like in their morphology. A mathematical description of this seemingly random structure dates to the seminal works by Forest and Witten (1979). In their work, the aggregate mass and characteristic length were related with a power-law relationship parameterized with a fractal dimension (Df), which quantifies aggregates’ dimensionality, and a prefactor (kf), which is recently shown to be related to their shape anisotropy. With the advent of mass-based aerosol particle classifiers, aggregates morphology can be alternatively characterized with a power-law relationship connecting their mass and mobility diameter, which is parameterized with a pair of mass-mobility exponent (Dfm) and prefactor (kfm). Knowledge of the exact empirical relationships between these pairs of parameters (Df - Dfm and kf - kfm) is essential for accurate characterization of aggregate physical properties. In this dissertation, comprehensive empirical relationships were established between these parameters for aggregates produced with a diffusion-limited cluster-cluster aggregation (DLCA) mechanism. The influence of aggregates’ shape anisotropy on their mass-mobility relationship was evaluated using the concept of apparent monomer screening.Prolonged aggregation leads to the phenomenon of gelation at a micrometer level, in which the submicron DLCA aggregates with a characteristic Df ≈ 1.8 jam together to form volume spanning gels with a characteristic Df ≈ 2.5. These aerosol gel particles, sometimes called superaggregates, have been observed in laboratory-scale diffusion flames, as well as in the naturally occurring large-scale combustions such as wildfires. Toward explaining the morphology and growth mechanism of superaggregates, Sorensen and Chakrabarti (2011) established the theoretical framework of aerosol gelation, which details the dynamic process by which gels are produced from their precursor sols. Part of this dissertation focuses on investigating the kinetics of aerosol gelation with emphasis placed on the previously understudied late-stage regimes in which the mean-field Smoluchowski Equation fails. This late stage kinetics of gelation was probed using a high temporal resolution Monte Carlo DLCA simulation, and system independent kinetic formulations were established along with improved parametrization on the characteristic gelation times.The morphology and growth mechanism of aerosol gels in the super-micron regime can be largely system… Advisors/Committee Members: Rajan K. Chakrabarty, Richard L. Axelbaum, Pratim Biswas, Milorad P. Dudukovic, Fangqiong Ling.

Subjects/Keywords: Aerosol Physics; Aggregation; Gelation; Kinetics; Nanomaterial Synthesis; Scaling Laws; Chemical Engineering; Environmental Engineering; Physics

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APA (6^th Edition):

Liu, P. (2019). Contemporary Problems in Aerosol Aggregation and Gelation. (Doctoral Dissertation). Washington University in St. Louis. Retrieved from https://openscholarship.wustl.edu/eng_etds/496

Chicago Manual of Style (16^th Edition):

Liu, Pai. “Contemporary Problems in Aerosol Aggregation and Gelation.” 2019. Doctoral Dissertation, Washington University in St. Louis. Accessed January 22, 2021. https://openscholarship.wustl.edu/eng_etds/496.

MLA Handbook (7^th Edition):

Liu, Pai. “Contemporary Problems in Aerosol Aggregation and Gelation.” 2019. Web. 22 Jan 2021.

Vancouver:

Liu P. Contemporary Problems in Aerosol Aggregation and Gelation. [Internet] [Doctoral dissertation]. Washington University in St. Louis; 2019. [cited 2021 Jan 22]. Available from: https://openscholarship.wustl.edu/eng_etds/496.

Council of Science Editors:

Liu P. Contemporary Problems in Aerosol Aggregation and Gelation. [Doctoral Dissertation]. Washington University in St. Louis; 2019. Available from: https://openscholarship.wustl.edu/eng_etds/496

Georgia Tech

8. Donzis, Diego Aaron. Scaling of turbulence and turbulent mixing using Terascale numerical simulations.

Degree: PhD, Aerospace Engineering, 2007, Georgia Tech

URL: http://hdl.handle.net/1853/19794

► Fundamental aspects of turbulence and turbulent mixing are investigated using direct numerical simulations (DNS) of stationary isotropic turbulence, with Taylor-scale Reynolds numbers ranging from 8… (more)

▼ Fundamental aspects of turbulence and turbulent mixing are investigated using direct numerical simulations (DNS) of stationary isotropic turbulence, with Taylor-scale Reynolds numbers ranging from 8 to 650 and Schmidt numbers from 1/8 to 1024. The primary emphasis is on important scaling issues that arise in the study of intermittency, mixing and turbulence under solid-body rotation. Simulations up to 2048³ in size have been performed using large resource allocations on Terascale computers at leading supercomputing centers. Substantial efforts in algorithmic development have also been undertaken and resulted in a new code based on a two-dimensional domain decomposition which allows the use of very large number of processors.Benchmark tests indicate very good parallel performance for resolutions up to 4096³ on up to 32768 processors. Investigation of intermittency through the statistics of dissipation and enstrophy in a series of simulations at the same Reynolds number but different resolution indicate that accurate results in high-order moments require a higher degree of fine-scale resolution than commonly practiced. At the highest Reynolds number in our simulations (400 and 650) dissipation and enstrophy exhibit extreme fluctuations of O(1000) the mean which have not been studied in the literature before and suggest a universal scaling of small scales. Simulations at Reynolds number of 650 on 2048³ grids with scalars at Sc=1/8 and 1 have allowed us to obtain the clearest evidence of attainment of inertial-convective scaling in the scalar spectrum in numerical simulations to date whereas results at high Sc support k^-1 viscous-convective scaling. Intermittency for scalars as measured by the tail of the PDF of scalar dissipation and moments of scalar gradient fluctuations is found to saturate at high Sc. Persistent departures from isotropy are observed as the Reynolds number increases. However, results suggest a return to isotropy at high Schmidt numbers, a tendency that appears to be stronger at high Reynolds numbers. The effects of the Coriolis force on turbulence under solid-body rotation are investigated using simulations on enlarged solution domains which reduce the effects of periodic boundary conditions. Advisors/Committee Members: Yeung Pui-Kuen (Committee Chair), Menon, Suresh (Committee Member), Neitzel, Paul (Committee Member), Sreenivasan, Katepalli (Committee Member), Webster, Donald (Committee Member).

Subjects/Keywords: Turbulence; Fluid dynamics; Large scale simulations; Direct numerical simulations; Turbulence; Algorithms; Scaling laws (Statistical physics); Energy dissipation; Computer simulation

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APA (6^th Edition):

Donzis, D. A. (2007). Scaling of turbulence and turbulent mixing using Terascale numerical simulations. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/19794

Chicago Manual of Style (16^th Edition):

Donzis, Diego Aaron. “Scaling of turbulence and turbulent mixing using Terascale numerical simulations.” 2007. Doctoral Dissertation, Georgia Tech. Accessed January 22, 2021. http://hdl.handle.net/1853/19794.

MLA Handbook (7^th Edition):

Donzis, Diego Aaron. “Scaling of turbulence and turbulent mixing using Terascale numerical simulations.” 2007. Web. 22 Jan 2021.

Vancouver:

Donzis DA. Scaling of turbulence and turbulent mixing using Terascale numerical simulations. [Internet] [Doctoral dissertation]. Georgia Tech; 2007. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/1853/19794.

Council of Science Editors:

Donzis DA. Scaling of turbulence and turbulent mixing using Terascale numerical simulations. [Doctoral Dissertation]. Georgia Tech; 2007. Available from: http://hdl.handle.net/1853/19794

Georgia Tech

9. Subbiah, Sathyan. Some Investigations of Scaling Effects in Micro-Cutting.

Degree: PhD, Mechanical Engineering, 2006, Georgia Tech

URL: http://hdl.handle.net/1853/13938

► The scaling of specific cutting energy is studied when micro-cutting ductile metals. A unified framework for understanding the scaling in specific cutting energy is first… (more)

▼ The scaling of specific cutting energy is studied when micro-cutting ductile metals. A unified framework for understanding the scaling in specific cutting energy is first presented by viewing the cutting force as a combination of constant, increasing, and decreasing force components, the independent variable being the uncut chip thickness. Then, an attempt is made to isolate the constant force component by performing high rake angle orthogonal cutting experiments on OFHC Copper. The data shows a trend towards a constant cutting force component as the rake angle is increased. In order to understand the source of this constant force component the chip-root is investigated. By quickly stopping the spindle at low cutting speeds, the chip is frozen and the chip-workpiece interface is examined in a scanning electron microscope. Evidence of ductile tearing ahead of the cutting tool is seen at low and high rake angles. At higher cutting speeds a quick-stop device is used to obtain chip-roots. These experiments also clearly indicate evidence of ductile fracture ahead of the cutting tool in both OFHC Copper and Al-2024 T3. To model the cutting process with ductile fracture leading to material separation the finite element method is used. The model is implemented in a commercial finite element software using the explicit formulation. Material separation is modeled via element failure. The model is then validated using the measured cutting and thrust forces and used to study the energy consumed in cutting. As the thickness of layer removed is reduced the energy consumed in material separation becomes important. Simulations also show that the stress state ahead of the tool is favorable for ductile fracture to occur. Ductile fracture in three locations in an interface zone at the chip root is seen while cutting with edge radius tool. A hypothesis is advanced wherein an element gets wrapped around the tool edge and is stretched in two directions leading to fracture. The numerical model is then used to study the difference in stress state and energy consumption between a sharp tool and a tool with a non-zero edge radius. Advisors/Committee Members: Melkote, Shreyes (Committee Chair), Danyluk, Steven (Committee Member), Koehler, Stephan (Committee Member), McDowell, David (Committee Member), Zhou, Chen (Committee Member).

Subjects/Keywords: Micro-cutting; Ductile fracture; Size effect; Scaling laws (Statistical physics); Micromachining; Fracture mechanics; Cutting

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APA (6^th Edition):

Subbiah, S. (2006). Some Investigations of Scaling Effects in Micro-Cutting. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/13938

Chicago Manual of Style (16^th Edition):

Subbiah, Sathyan. “Some Investigations of Scaling Effects in Micro-Cutting.” 2006. Doctoral Dissertation, Georgia Tech. Accessed January 22, 2021. http://hdl.handle.net/1853/13938.

MLA Handbook (7^th Edition):

Subbiah, Sathyan. “Some Investigations of Scaling Effects in Micro-Cutting.” 2006. Web. 22 Jan 2021.

Vancouver:

Subbiah S. Some Investigations of Scaling Effects in Micro-Cutting. [Internet] [Doctoral dissertation]. Georgia Tech; 2006. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/1853/13938.

Council of Science Editors:

Subbiah S. Some Investigations of Scaling Effects in Micro-Cutting. [Doctoral Dissertation]. Georgia Tech; 2006. Available from: http://hdl.handle.net/1853/13938

Kansas State University

10. Newcomb, Joal J. A test of multiple ionization scaling in Sc.

Degree: MS, 1979, Kansas State University

URL: http://hdl.handle.net/2097/27136

Subjects/Keywords: Scaling laws (Nuclear physics); Collisions (Nuclear physics); Masters theses

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APA (6^th Edition):

Newcomb, J. J. (1979). A test of multiple ionization scaling in Sc. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/27136

Chicago Manual of Style (16^th Edition):

Newcomb, Joal J. “A test of multiple ionization scaling in Sc.” 1979. Masters Thesis, Kansas State University. Accessed January 22, 2021. http://hdl.handle.net/2097/27136.

MLA Handbook (7^th Edition):

Newcomb, Joal J. “A test of multiple ionization scaling in Sc.” 1979. Web. 22 Jan 2021.

Vancouver:

Newcomb JJ. A test of multiple ionization scaling in Sc. [Internet] [Masters thesis]. Kansas State University; 1979. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/2097/27136.

Council of Science Editors:

Newcomb JJ. A test of multiple ionization scaling in Sc. [Masters Thesis]. Kansas State University; 1979. Available from: http://hdl.handle.net/2097/27136

University of North Texas

11. Vanni, Fabio. Criticality in Cooperative Systems.

Degree: 2012, University of North Texas

URL: https://digital.library.unt.edu/ark:/67531/metadc271910/

► Cooperative behavior arises from the interactions of single units that globally produce a complex dynamics in which the system acts as a whole. As an… (more)

Subjects/Keywords: Criticality; complexity; cooperation; decision making; flocking systems; statistical physics; renewal; power laws

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APA (6^th Edition):

Vanni, F. (2012). Criticality in Cooperative Systems. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc271910/

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

Chicago Manual of Style (16^th Edition):

Vanni, Fabio. “Criticality in Cooperative Systems.” 2012. Thesis, University of North Texas. Accessed January 22, 2021. https://digital.library.unt.edu/ark:/67531/metadc271910/.

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

MLA Handbook (7^th Edition):

Vanni, Fabio. “Criticality in Cooperative Systems.” 2012. Web. 22 Jan 2021.

Vancouver:

Vanni F. Criticality in Cooperative Systems. [Internet] [Thesis]. University of North Texas; 2012. [cited 2021 Jan 22]. Available from: https://digital.library.unt.edu/ark:/67531/metadc271910/.

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

Council of Science Editors:

Vanni F. Criticality in Cooperative Systems. [Thesis]. University of North Texas; 2012. Available from: https://digital.library.unt.edu/ark:/67531/metadc271910/

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

Hong Kong University of Science and Technology

12. Lim, Sze-Wah. Competing population : effects of diverse preferences and a finite-size scaling theory of dynamical transitions.

Degree: 2006, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-5456 ; https://doi.org/10.14711/thesis-b924265 ; http://repository.ust.hk/ir/bitstream/1783.1-5456/1/th_redirect.html

► We study the collective behavior of a competing population through a multi-agent system called the Minority Game. We introduce diverse initial preferences among the agents… (more)

Subjects/Keywords: Game theory ; Finite size scaling (Statistical physics) ; Phase transformations (Statistical physics)

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APA (6^th Edition):

Lim, S. (2006). Competing population : effects of diverse preferences and a finite-size scaling theory of dynamical transitions. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-5456 ; https://doi.org/10.14711/thesis-b924265 ; http://repository.ust.hk/ir/bitstream/1783.1-5456/1/th_redirect.html

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

Chicago Manual of Style (16^th Edition):

Lim, Sze-Wah. “Competing population : effects of diverse preferences and a finite-size scaling theory of dynamical transitions.” 2006. Thesis, Hong Kong University of Science and Technology. Accessed January 22, 2021. http://repository.ust.hk/ir/Record/1783.1-5456 ; https://doi.org/10.14711/thesis-b924265 ; http://repository.ust.hk/ir/bitstream/1783.1-5456/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Lim, Sze-Wah. “Competing population : effects of diverse preferences and a finite-size scaling theory of dynamical transitions.” 2006. Web. 22 Jan 2021.

Vancouver:

Lim S. Competing population : effects of diverse preferences and a finite-size scaling theory of dynamical transitions. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2006. [cited 2021 Jan 22]. Available from: http://repository.ust.hk/ir/Record/1783.1-5456 ; https://doi.org/10.14711/thesis-b924265 ; http://repository.ust.hk/ir/bitstream/1783.1-5456/1/th_redirect.html.

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

Council of Science Editors:

Lim S. Competing population : effects of diverse preferences and a finite-size scaling theory of dynamical transitions. [Thesis]. Hong Kong University of Science and Technology; 2006. Available from: http://repository.ust.hk/ir/Record/1783.1-5456 ; https://doi.org/10.14711/thesis-b924265 ; http://repository.ust.hk/ir/bitstream/1783.1-5456/1/th_redirect.html

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

Freie Universität Berlin

13. Langenbruch, Cornelius. Fluidinjektions-induzierte Erdbeben und Skaleninvarianz.

Degree: 2014, Freie Universität Berlin

URL: https://refubium.fu-berlin.de/handle/fub188/13700

► Seismogene Prozesse in der spröden Erdkruste werden maßgeblich durch verschiedene Aspekte von Spannung gelenkt. Deshalb ist es entscheidend, die Bedeutung von Spannungen für die Entstehung… (more)

▼ Seismogene Prozesse in der spröden Erdkruste werden maßgeblich durch verschiedene Aspekte von Spannung gelenkt. Deshalb ist es entscheidend, die Bedeutung von Spannungen für die Entstehung und das Auftreten von Erdbeben zu bestimmen. In dieser Arbeit untersuche ich die Rolle von Spannungsfluktuationen in seismogenen Prozessen. Im Besonderen ziehe ich Rückschlüsse aus dem Konzept der Skaleninvarianz und der Analyse fluid- induzierter Erdbeben, die durch das Einpressen unter Druck gesetzter Fluide in Bohrlöcher ausgelöst werden. Diese Methode der hydraulischen Reservoirstimulation wird unter anderem zur Entwicklung sogenannter Enhanced Geothermal Systems (EGS) im kristallinen Grundgebirge für eine nachhaltige Stromerzeugung durchgeführt. Die Untersuchung fluid-induzierter seismischer Ereignisse ist von besonderer Bedeutung, weil die grundlegenden Rahmenbedingungen während der Bildung und dem Auftreten der seismischen Ereignisse besser zugänglich sind als für Erdbeben auf tektonischer Größenordnung. Die beobachtete Skaleninvarianz der Physik der Erdbeben weist auf eine Übertragbarkeit der Ergebnisse hin, die auf einer anderen Größenskala erlangt wurden. Ich quantifiziere die Störung des Spannungszustandes, der durch das Einpressen von Fluiden während hydraulischen Reservoir Stimulationen hervorgerufen wird. Hierbei wird angenommen, dass die seismischen Ereignisse durch Porendruckdiffusion im Poren- und Kluftraum von Gesteinen ausgelöst werden. Des Weiteren wird die Bedeutung von Spannungsänderungen, welche durch das Auftreten fluid-induzierter seismischer Ereignisse bedingt sind, anhand einer Analyse der Wartezeiten zwischen aufeinander folgenden Ereignissen ausgewertet. Meine Ergebnisse zeigen, dass innerhalb sechs betrachteter Kataloge fluid-induzierter Seismizität an EGS Standorten, keine Nachbebensignaturen identifizierbar sind. Basierend auf diesem Ergebnis zeige ich, dass das Poisson Model zur Berechnung der Auftrittswahrscheinlichkeit fluid-induzierter Erdbeben herangezogen werden kann. Die Entwicklung dieses statistischen Models ist von großer Bedeutung, weil das seismische Risiko immer noch ein Hindernis für eine effiziente und risikofreie Nutzung des geothermischen Potenzials des Untergrundes für die nachhaltige Stromerzeugung darstellt. Die Erkenntnis, dass Spannungsänderungen, die durch das Auftreten vorangegangener seismischer Ereignisse entstehen, im Vergleich zu Spannungsänderungen, welche direkt durch das Einpressen von Fluid verursacht sind, für die Seismogenese fluid-induzierter Erdbeben von vernachlässigbarer Bedeutung sind unterstreicht die Aussagekraft der Studien, die Porendruckdiffusion als den auslösenden Prozess seismischer Ereignisse betrachten. Unter genau dieser Annahme und dem Gesichtspunkt eines nahe kritischen Spannungszustands in der Erdkruste entwickle ich ein physikalisch basiertes statistisches Model zur Bestimmung der Seismizitätsrate während und nach hydraulischen Reservoirstimulationen. Die Untersuchung von nach Stimulationsabschluss auftretender fluid-induzierter Seismizität ist… Advisors/Committee Members: [email protected] (contact), m (gender), Prof. Dr. Serge. A. Shapiro (firstReferee), Prof. Dr. Frederik Tilmann (furtherReferee).

Subjects/Keywords: stress; fluid injection; earthquake; scale invariance; seismogenic processes; scaling laws; microseismicity; rock physics; 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

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APA (6^th Edition):

Langenbruch, C. (2014). Fluidinjektions-induzierte Erdbeben und Skaleninvarianz. (Thesis). Freie Universität Berlin. Retrieved from https://refubium.fu-berlin.de/handle/fub188/13700

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

Chicago Manual of Style (16^th Edition):

Langenbruch, Cornelius. “Fluidinjektions-induzierte Erdbeben und Skaleninvarianz.” 2014. Thesis, Freie Universität Berlin. Accessed January 22, 2021. https://refubium.fu-berlin.de/handle/fub188/13700.

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

MLA Handbook (7^th Edition):

Langenbruch, Cornelius. “Fluidinjektions-induzierte Erdbeben und Skaleninvarianz.” 2014. Web. 22 Jan 2021.

Vancouver:

Langenbruch C. Fluidinjektions-induzierte Erdbeben und Skaleninvarianz. [Internet] [Thesis]. Freie Universität Berlin; 2014. [cited 2021 Jan 22]. Available from: https://refubium.fu-berlin.de/handle/fub188/13700.

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

Council of Science Editors:

Langenbruch C. Fluidinjektions-induzierte Erdbeben und Skaleninvarianz. [Thesis]. Freie Universität Berlin; 2014. Available from: https://refubium.fu-berlin.de/handle/fub188/13700

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

University of Canterbury

14. Burghelea T. On the Landau-Levich problem for a viscoplastic fluid.

Degree: 2013, University of Canterbury

URL: http://hdl.handle.net/10092/100757

► A systematic investigation of the Landau-Levich problem of a viscoplastic material (Carbopol 980 is presented). The validity of the Landau-Levich scaling is assessed via integral… (more)

Subjects/Keywords: yield stress; Landau-Levich problem; scaling; Field of Research::01 - Mathematical Sciences::0105 - Mathematical Physics::010506 - Statistical Mechanics, Physical Combinatorics and Mathematical Aspects of Condensed Matter

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APA (6^th Edition):

T, B. (2013). On the Landau-Levich problem for a viscoplastic fluid. (Thesis). University of Canterbury. Retrieved from http://hdl.handle.net/10092/100757

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

Chicago Manual of Style (16^th Edition):

T, Burghelea. “On the Landau-Levich problem for a viscoplastic fluid.” 2013. Thesis, University of Canterbury. Accessed January 22, 2021. http://hdl.handle.net/10092/100757.

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

MLA Handbook (7^th Edition):

T, Burghelea. “On the Landau-Levich problem for a viscoplastic fluid.” 2013. Web. 22 Jan 2021.

Vancouver:

T B. On the Landau-Levich problem for a viscoplastic fluid. [Internet] [Thesis]. University of Canterbury; 2013. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/10092/100757.

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

Council of Science Editors:

T B. On the Landau-Levich problem for a viscoplastic fluid. [Thesis]. University of Canterbury; 2013. Available from: http://hdl.handle.net/10092/100757

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

15. Souguir, Sabri. Simulation numérique de l'initiation de la rupture à l'échelle atomique : Atomistic simulation of brittle failure initiation.

Degree: Docteur es, Mécanique, 2018, Université Paris-Est

URL: http://www.theses.fr/2018PESC1082

► En ingénierie mécanique, la rupture des matériaux est un risque qu'il convient d'anticiper et qui reste aujourd'hui une menace pour les structures. La rupture des… (more)

▼ En ingénierie mécanique, la rupture des matériaux est un risque qu'il convient d'anticiper et qui reste aujourd'hui une menace pour les structures. La rupture des systèmes pré-fissurés a lieu quand l'énergie libérée par la propagation de la fissure préexistante excède un seuil critique (taux de restitution d'énergie) qui représente une propriété du matériau. Au contraire, la rupture de systèmes sans défauts préexistants survient lorsque la contrainte appliquée atteint la résistance, également propriété du matériau. L'existence de deux critères pour la rupture semble indiquer des mécanismes d'amorçage différents, ce qui soulève la question des cas réels intermédiaires qui présentent des concentrations de contrainte modérées. Différentes approches existantes sont cohérentes avec les deux situations limites mais il n'y a pas de consensus clair dans la communauté scientifique. Dans cette thèse, nous étudions les mécanismes de la rupture fragile à l'échelle atomique afin d'en comprendre l'origine physique pour différentes concentrations de contraintes. La rupture provient de la rupture des liaisons à l'échelle atomique. Nous utilisons donc des techniques de simulation moléculaire pour étudier la physique élémentaire de l'initiation de la rupture fragile. Dans ce but, on étudie deux types de structure atomique. Le premier est un matériau modèle à maille triangulaire, dont le potentiel permet d'interpréter analytiquement, et avec précision, les résultats des simulations moléculaires. L'étude est étendue à un système plus réel : le graphène. Ce matériau, qui présente une résistance élevée au regard de sa faible ténacité, a l'une des plus petites tailles de zone d'élaboration par rapport aux autres matériaux fragiles, ce qui permet d'appliquer numériquement les concepts de la rupture fragile jusqu'à l'échelle nanométrique de la simulation moléculaire. On s'intéresse dans un premier temps à la rupture des matériaux à 0K. À cette température, un système atomique est en équilibre statique. La rupture peut donc être traitée comme une instabilité. L'analyse du profil énergétique du système atomique fournit un moyen d'identifier les mécanismes de rupture. Nous montrons qu'on peut identifier la rupture en cherchant les valeurs propres nulles ou négative de la matrice hessienne. Les vecteurs propres correspondants indiquent les modes de rupture et montrent l'apparition de bandes de transition entre mouvements de groupes d'atomes pour des systèmes intacts, dont la largeur rappelle la longueur d'élaboration, généralement introduite dans des théories macroscopiques d'initiation de la rupture. On étudie aussi l'effet de la présence de défauts sur les modes d'instabilité et leur dégénérescence. Cette étude fournit une technique générale pour identifier les mécanismes d'initiation de rupture quelle que soit la concentration de contrainte dans la structure. On s'intéresse ensuite aux températures non nulles. On étudie les effets combinés de la température, de la taille du système et du taux de chargement. En partant de la théorie cinétique,… Advisors/Committee Members: Sab, Karam (thesis director), Brochard, Laurent (thesis director).

Subjects/Keywords: Simulation moléculaire; Physique statistique; Rupture des matériaux; Instabilité atomique; Loi d’échelle; Graphène; Molecular simulation; Statistical physics; Material failure; Atomic instability; Scaling law; Graphene

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

APA (6^th Edition):

Souguir, S. (2018). Simulation numérique de l'initiation de la rupture à l'échelle atomique : Atomistic simulation of brittle failure initiation. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2018PESC1082

Chicago Manual of Style (16^th Edition):

Souguir, Sabri. “Simulation numérique de l'initiation de la rupture à l'échelle atomique : Atomistic simulation of brittle failure initiation.” 2018. Doctoral Dissertation, Université Paris-Est. Accessed January 22, 2021. http://www.theses.fr/2018PESC1082.

MLA Handbook (7^th Edition):

Souguir, Sabri. “Simulation numérique de l'initiation de la rupture à l'échelle atomique : Atomistic simulation of brittle failure initiation.” 2018. Web. 22 Jan 2021.

Vancouver:

Souguir S. Simulation numérique de l'initiation de la rupture à l'échelle atomique : Atomistic simulation of brittle failure initiation. [Internet] [Doctoral dissertation]. Université Paris-Est; 2018. [cited 2021 Jan 22]. Available from: http://www.theses.fr/2018PESC1082.

Council of Science Editors:

Souguir S. Simulation numérique de l'initiation de la rupture à l'échelle atomique : Atomistic simulation of brittle failure initiation. [Doctoral Dissertation]. Université Paris-Est; 2018. Available from: http://www.theses.fr/2018PESC1082

Texas A&M University

16. Gao, Long. Throughput and Delay Analysis in Cognitive Overlaid Networks.

Degree: PhD, Electrical Engineering, 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7531

► Consider a cognitive overlaid network (CON) that has two tiers with different priorities: a primary tier vs. a secondary tier, which is an emerging network… (more)

▼ Consider a cognitive overlaid network (CON) that has two tiers with different priorities: a primary tier vs. a secondary tier, which is an emerging network scenario with the advancement of cognitive radio (CR) technologies. The primary tier consists of randomly distributed primary radios (PRs) of density n, which have an absolute priority to access the spectrum. The secondary tier consists of randomly distributed CRs of density m = n^y with y greater than or equal to 1, which can only access the spectrum opportunistically to limit the interference to PRs. In this dissertation, the fundamental limits of such a network are investigated in terms of the asymptotic throughput and packet delay performance when m and n approaches infinity. The following two types of CONs are considered: 1) selfish CONs, in which neither the primary tier nor the secondary tier is willing to route the packets for the other, and 2) supportive CONs, in which the secondary tier is willing to route the packets for the primary tier while the primary tier does not. It is shown that in selfish CONs, both tiers can achieve the same throughput and delay scaling laws as a stand-alone network. In supportive CONs, the throughput and delay scaling laws of the primary tier could be significantly improved with the aid of the secondary tier, while the secondary tier can still achieve the same throughput and delay scaling laws as a stand-alone network. Finally, the throughput and packet delay of a CON with a small number of nodes are investigated. Specifically, we investigate the power and rate control schemes for multiple CR links in the same neighborhood, which operate over multiple channels (frequency bands) in the presence of PRs with a delay constraint imposed on data transmission. By further considering practical limitations in spectrum sensing, an efficient algorithm is proposed to maximize the average sum-rate of the CR links over a finite time horizon under the constraints on the CR-to-PR interference and the average transmit power for each CR link. In the proposed algorithm, the PR occupancy of each channel is modeled as a discrete-time Markov chain (DTMC). Based on such a model, a novel power and rate control strategy based on dynamic programming (DP) is derived, which is a function of the spectrum sensing output, the instantaneous channel gains for the CR links, and the remaining power budget for the CR transmitter. Simulation results show that the proposed algorithm leads to a significant performance improvement over heuristic algorithms. Advisors/Committee Members: Cui, Shuguang (advisor), Xiong, Zixiang (committee member), Shakkottai, Srinivas (committee member), Ntaimo, Lewis (committee member).

Subjects/Keywords: Cognitive Radio; Throughput; Delay; Overlaid Networks; Scaling Laws; Asymptotic Analysis.

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

APA (6^th Edition):

Gao, L. (2011). Throughput and Delay Analysis in Cognitive Overlaid Networks. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7531

Chicago Manual of Style (16^th Edition):

Gao, Long. “Throughput and Delay Analysis in Cognitive Overlaid Networks.” 2011. Doctoral Dissertation, Texas A&M University. Accessed January 22, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7531.

MLA Handbook (7^th Edition):

Gao, Long. “Throughput and Delay Analysis in Cognitive Overlaid Networks.” 2011. Web. 22 Jan 2021.

Vancouver:

Gao L. Throughput and Delay Analysis in Cognitive Overlaid Networks. [Internet] [Doctoral dissertation]. Texas A&M University; 2011. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7531.

Council of Science Editors:

Gao L. Throughput and Delay Analysis in Cognitive Overlaid Networks. [Doctoral Dissertation]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7531

University of Newcastle

17. Forghani, Marveh. Consolidation of large spherical particles at low Reynolds numbers.

Degree: MPhil, 2015, University of Newcastle

URL: http://hdl.handle.net/1959.13/1308128

►

Masters Research - Master of Philosophy (MPhil)

This study was concerned with the validation of a new theoretical model (Galvin et al., 2015) to describe… (more)

Subjects/Keywords: consolidation; sedimentation; scaling laws; non-colloidal spheres; low Reynolds number

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

APA (6^th Edition):

Forghani, M. (2015). Consolidation of large spherical particles at low Reynolds numbers. (Masters Thesis). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1308128

Chicago Manual of Style (16^th Edition):

Forghani, Marveh. “Consolidation of large spherical particles at low Reynolds numbers.” 2015. Masters Thesis, University of Newcastle. Accessed January 22, 2021. http://hdl.handle.net/1959.13/1308128.

MLA Handbook (7^th Edition):

Forghani, Marveh. “Consolidation of large spherical particles at low Reynolds numbers.” 2015. Web. 22 Jan 2021.

Vancouver:

Forghani M. Consolidation of large spherical particles at low Reynolds numbers. [Internet] [Masters thesis]. University of Newcastle; 2015. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/1959.13/1308128.

Council of Science Editors:

Forghani M. Consolidation of large spherical particles at low Reynolds numbers. [Masters Thesis]. University of Newcastle; 2015. Available from: http://hdl.handle.net/1959.13/1308128

Colorado State University

18. Mater, Benjamin D. Dynamics and parameterization of stably stratified turbulence: implications for estimates of mixing in geophysical flows.

Degree: PhD, Civil and Environmental Engineering, 2014, Colorado State University

URL: http://hdl.handle.net/10217/83789

► This research focuses on the relationship between the observed length scales of overturns in stably-stratified shear-flow turbulence and the fundamental length scales constructed from dimensional… (more)

▼ This research focuses on the relationship between the observed length scales of overturns in stably-stratified shear-flow turbulence and the fundamental length scales constructed from dimensional analysis of basic physical quantities. In geophysical flows such as the ocean, overturns are relatively easy to observe while the basic quantities are not. As such, overturns provide a means of inferring basic quantities if the relationship between the observed and fundamental scales are known. In turn, inferred values of the basic quantities, namely the the turbulent kinetic energy k, and the dissipation rate of turbulent kinetic energy ϵ, can be used to estimate diapycnal diffusivity (i.e. turbulent mixing). Most commonly, the observed Thorpe length scale, LT, is assumed to scale linearly with the fundamental Ozmidov scale, LO =(ϵ/N3)1/2, so that inferred values of ϵ can be obtained and used to estimate mixing from the Osborn formulation for diapycnal diffusivity. A major goal of this research is to re-examine this and other possible scalings using dimensional analysis, direct numerical simulation (DNS), laboratory data, and field observations. The preliminary chapters constitute a fresh approach at dimensional analysis that presents the fundamental length scales, time scales, and dimensionless parameters relevant to the problem. The relationship between LT and the fundamental length scales is then examined for the simple case of homogeneously stratified turbulence (without shear) using DNS. A key finding is that the common practice of inferring ϵ from LT ~ LO, is valid at the transition between a buoyancy-dominated regime and an inertia-dominated regime where the time scale of the buoyancy oscillations, N-1, roughly matches that of the inertial motions, TL = k/ϵ. Regime definition is made possible using a non-dimensional buoyancy strength parameter NTL = Nk/ϵ. Next, the problem is generalized to consider mean shear, and thus, a shear strength parameter, STL = Sk/ϵ, and the gradient Richardson number, Ri = N2/S2, are considered along with NTL to define three regimes available to high Reynolds number stratified shear-flow turbulence: a buoyancy-dominated regime (NTL ≳ 1.7, Ri ≳ 0.25), a shear-dominated regime (STL ≳ 3.3, Ri ≲ 0.25), and an inertia-dominated regime (NTL ≲ 1.7, STL ≲ 3.3). The regimes constitute a multi-dimensional parameter space which elucidates the independent influences that shear and stratification have on the turbulence. Using a large database of DNS and laboratory results, overturns are shown to have unique scalings in the various regimes. Specifically, LT ~ k1/2N-1, LT ~ k1/2S-1, and LT ~ k3/2ϵ-1 in the buoyancy-, shear-, and inertia-dominated regimes, respectively. LT ~ LO is found only for the case of NTL = O(1) and STL ≲ 3.3, or for NTL = O(100), STL ≈ 3.3 and Ri ≈ 0.25 when shear is present. In all three regimes, LT is found to generally indicate k rather than ϵ. An alternative parameterization of turbulent diffusivity is developed based on inferred values of k with a practical eye toward field… Advisors/Committee Members: Venayagamoorthy, Subhas K. (advisor), Bledsoe, Brian P. (committee member), Dasi, Lakshmi P. (committee member), Julien, Pierre Y. (committee member).

Subjects/Keywords: diapycnal mixing; ocean turbulence; parameterization; scaling laws; stratified turbulence; turbulent flows

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APA (6^th Edition):

Mater, B. D. (2014). Dynamics and parameterization of stably stratified turbulence: implications for estimates of mixing in geophysical flows. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/83789

Chicago Manual of Style (16^th Edition):

Mater, Benjamin D. “Dynamics and parameterization of stably stratified turbulence: implications for estimates of mixing in geophysical flows.” 2014. Doctoral Dissertation, Colorado State University. Accessed January 22, 2021. http://hdl.handle.net/10217/83789.

MLA Handbook (7^th Edition):

Mater, Benjamin D. “Dynamics and parameterization of stably stratified turbulence: implications for estimates of mixing in geophysical flows.” 2014. Web. 22 Jan 2021.

Vancouver:

Mater BD. Dynamics and parameterization of stably stratified turbulence: implications for estimates of mixing in geophysical flows. [Internet] [Doctoral dissertation]. Colorado State University; 2014. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/10217/83789.

Council of Science Editors:

Mater BD. Dynamics and parameterization of stably stratified turbulence: implications for estimates of mixing in geophysical flows. [Doctoral Dissertation]. Colorado State University; 2014. Available from: http://hdl.handle.net/10217/83789

University of Melbourne

19. Ng, Chong Shen. Direct numerical simulation of turbulent natural convection bounded by differentially heated vertical walls.

Degree: 2013, University of Melbourne

URL: http://hdl.handle.net/11343/39593

► Using new, high-resolution direct numerical simulation (DNS) data, this study appraises the different scaling laws found in literature for turbulent natural convection of air in… (more)

▼ Using new, high-resolution direct numerical simulation (DNS) data, this study appraises the different scaling laws found in literature for turbulent natural convection of air in a differentially heated vertical channel. The present data is validated using past DNS studies, and covers the Rayleigh number (Ra) range between 5.4 × 10⁵ to 1.0 × 10⁸. This is followed by an appraisal of various scaling laws proposed by four studies: Versteegh and Nieuwstadt (77), Holling and Herwig (34), Shiri and George (63) and George and Capp (23). These scaling laws are appraised with the profiles of the mean temperature defect, mean streamwise velocity, normal velocity fluctuations, temperature fluctuations and Reynolds shear stress. Based on the arguments of an inner (near-wall) and outer (channel-centre) region, the DNS data is found to support a −1/3 power law for the mean temperature in an overlap region. Using the inner and outer temperature profiles, an implicit heat transfer equation is obtained and a correction term in the equation is shown to be not negligible for the present Ra range when compared with explicit equations found in literature. In addition, I determined that the mean streamwise velocity and normal velocity fluctuations collapse in the inner region when using the outer velocity scale. A similar collapse is noted in the profiles of temperature fluctuations with increasing Ra when normalised with inner temperature and length scale. Lastly, I show evidence of an incipient proportional relationship between friction velocity and the outer velocity scale with increasing Ra. The study is extended to the spectrum of turbulent kinetic energy and temperature fluctuations of the flow. The one-dimensional streamwise spectra collapse onto the −5/3 slope, coinciding with the standard Kolmogorov form of the power spectra reported in literature. This collapse is found to occur in the outer region of the flow in the bounds between the peaks of the mean streamwise velocity. In spectrogram form, I find evidence that the spectral peaks correspond to energetic velocity structures in the channel — the structures of streamwise velocity fluctuations appear to stretch half of the streamwise domain and occur at a quarter intervals in the spanwise direction. From 2-dimensional autocorrelations, the structures of spanwise velocity fluctuations are found to be organised in a hatched pattern in an inner location (z^× i ≈ 7) and at the channel-centre. The respective pattern angles are θ_ i ≈ 54◦ and θ_ o ≈ 48◦, both measured from the horizontal. For the temperature spectrum, the −5/3 collapse is also observed in the same bounds as the velocity spectrum. In pre-multiplied form, the spectral peak is found to occur at the wall-normal location which coincides with the peak temperature fluctuations in the channel. With increasing Ra, the wall-parallel isocontours of temperature are found to show standard features of turbulent pressure driven…

Subjects/Keywords: turbulence; vertical natural convection; DNS; scaling laws; spectra; flow visualisation

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APA (6^th Edition):

Ng, C. S. (2013). Direct numerical simulation of turbulent natural convection bounded by differentially heated vertical walls. (Masters Thesis). University of Melbourne. Retrieved from http://hdl.handle.net/11343/39593

Chicago Manual of Style (16^th Edition):

Ng, Chong Shen. “Direct numerical simulation of turbulent natural convection bounded by differentially heated vertical walls.” 2013. Masters Thesis, University of Melbourne. Accessed January 22, 2021. http://hdl.handle.net/11343/39593.

MLA Handbook (7^th Edition):

Ng, Chong Shen. “Direct numerical simulation of turbulent natural convection bounded by differentially heated vertical walls.” 2013. Web. 22 Jan 2021.

Vancouver:

Ng CS. Direct numerical simulation of turbulent natural convection bounded by differentially heated vertical walls. [Internet] [Masters thesis]. University of Melbourne; 2013. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/11343/39593.

Council of Science Editors:

Ng CS. Direct numerical simulation of turbulent natural convection bounded by differentially heated vertical walls. [Masters Thesis]. University of Melbourne; 2013. Available from: http://hdl.handle.net/11343/39593

Lehigh University

20. Ayancik Cinoglu, Fatma. Understanding the Role of Morphology and Kinematics in Bio-Inspired Locomotion.

Degree: PhD, Mechanical Engineering, 2019, Lehigh University

URL: https://preserve.lehigh.edu/etd/5722

► Inspired by the advanced capabilities of fish and other aquatic swimmers, in this thesis, a greater understanding of fish-like propulsion has been sought in… (more)

Subjects/Keywords: Fluid Mechanics; Optimization; Propulsion; Scaling Laws; Swimming; Unsteady Flows; Mechanical Engineering

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APA (6^th Edition):

Ayancik Cinoglu, F. (2019). Understanding the Role of Morphology and Kinematics in Bio-Inspired Locomotion. (Doctoral Dissertation). Lehigh University. Retrieved from https://preserve.lehigh.edu/etd/5722

Chicago Manual of Style (16^th Edition):

Ayancik Cinoglu, Fatma. “Understanding the Role of Morphology and Kinematics in Bio-Inspired Locomotion.” 2019. Doctoral Dissertation, Lehigh University. Accessed January 22, 2021. https://preserve.lehigh.edu/etd/5722.

MLA Handbook (7^th Edition):

Ayancik Cinoglu, Fatma. “Understanding the Role of Morphology and Kinematics in Bio-Inspired Locomotion.” 2019. Web. 22 Jan 2021.

Vancouver:

Ayancik Cinoglu F. Understanding the Role of Morphology and Kinematics in Bio-Inspired Locomotion. [Internet] [Doctoral dissertation]. Lehigh University; 2019. [cited 2021 Jan 22]. Available from: https://preserve.lehigh.edu/etd/5722.

Council of Science Editors:

Ayancik Cinoglu F. Understanding the Role of Morphology and Kinematics in Bio-Inspired Locomotion. [Doctoral Dissertation]. Lehigh University; 2019. Available from: https://preserve.lehigh.edu/etd/5722

University of Texas – Austin

21. Shah, Virag. Centralized content delivery infrastructure exploiting resource pools : performance models and asymptotics.

Degree: PhD, Electrical and Computer engineering, 2015, University of Texas – Austin

URL: http://hdl.handle.net/2152/31419

► We consider a centralized content delivery infrastructure where a large number of storage-intensive files are replicated across several collocated servers. To achieve scalable delays in… (more)

Subjects/Keywords: Content delivery infrastructure; Performance models; Queueing theory; Delays; Robustness; Scaling laws

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APA (6^th Edition):

Shah, V. (2015). Centralized content delivery infrastructure exploiting resource pools : performance models and asymptotics. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/31419

Chicago Manual of Style (16^th Edition):

Shah, Virag. “Centralized content delivery infrastructure exploiting resource pools : performance models and asymptotics.” 2015. Doctoral Dissertation, University of Texas – Austin. Accessed January 22, 2021. http://hdl.handle.net/2152/31419.

MLA Handbook (7^th Edition):

Shah, Virag. “Centralized content delivery infrastructure exploiting resource pools : performance models and asymptotics.” 2015. Web. 22 Jan 2021.

Vancouver:

Shah V. Centralized content delivery infrastructure exploiting resource pools : performance models and asymptotics. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2015. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/2152/31419.

Council of Science Editors:

Shah V. Centralized content delivery infrastructure exploiting resource pools : performance models and asymptotics. [Doctoral Dissertation]. University of Texas – Austin; 2015. Available from: http://hdl.handle.net/2152/31419

22. Nation, Charlie. Quantum chaos and the emergence of statistical physics.

Degree: PhD, 2020, University of Sussex

URL: http://sro.sussex.ac.uk/id/eprint/92150/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809111

► The question of how statistical physics can be seen to emerge from unitary quantum dynamics goes back to Schrödinger and von Neumann, however has been… (more)

▼ The question of how statistical physics can be seen to emerge from unitary quantum dynamics goes back to Schrödinger and von Neumann, however has been reaffirmed as a topic of importance due to recent advances in experimental capabilities, allowing the observation of the unitary evolution of many-particle systems over long periods of time. Understanding why such a system evolves to the specific thermal equilibrium state, effectively described by a relevant thermodynamic ensemble, has thus seen significantly more interest in recent years. Furthermore, observations of the dynamics of such systems open questions on the route to equilibrium, and subsequent fluctuations. In this thesis I will develop an approach to this problem, taking as a starting point the non-integrability of the system under study, which leads to a generic model in terms of random matrix theory (RMT), and more generally, chaotic wavefunctions. In the formulation of these methods, special attention is paid to the form of local observables of quantum systems, and an approach to their description is developed in terms of correlation functions of chaotic wavefunctions. From this approach a key conjecture in the understanding of thermalization, the eigenstate thermalization hypothesis (ETH), is derived in full, and the dynamical behaviour of such observables is obtained analytically. Further, I will show that emergent classical behaviour can be observed in the form of a fluctuation-dissipation theorem (FDT) of Brownian processes. This is exploited to develop an experimental proposal to measure the ‘complexity' of a quantum device, by experimentally obtaining its effective Hilbert space dimension in terms of a fully connected system. Finally, quantum jump trajectories, describing stroboscopic projective measurements of local observables are studied, and shown to display classical Brownian dynamics in the form of a Markov process. Throughout this thesis, exact diagonalization calculations of realistic quantum spin systems are used to confirm analytical results.

Subjects/Keywords: QC0174.8 Statistical physics

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APA (6^th Edition):

Nation, C. (2020). Quantum chaos and the emergence of statistical physics. (Doctoral Dissertation). University of Sussex. Retrieved from http://sro.sussex.ac.uk/id/eprint/92150/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809111

Chicago Manual of Style (16^th Edition):

Nation, Charlie. “Quantum chaos and the emergence of statistical physics.” 2020. Doctoral Dissertation, University of Sussex. Accessed January 22, 2021. http://sro.sussex.ac.uk/id/eprint/92150/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809111.

MLA Handbook (7^th Edition):

Nation, Charlie. “Quantum chaos and the emergence of statistical physics.” 2020. Web. 22 Jan 2021.

Vancouver:

Nation C. Quantum chaos and the emergence of statistical physics. [Internet] [Doctoral dissertation]. University of Sussex; 2020. [cited 2021 Jan 22]. Available from: http://sro.sussex.ac.uk/id/eprint/92150/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809111.

Council of Science Editors:

Nation C. Quantum chaos and the emergence of statistical physics. [Doctoral Dissertation]. University of Sussex; 2020. Available from: http://sro.sussex.ac.uk/id/eprint/92150/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809111

23. Shao, Shuai. Robustness and structure of complex networks.

Degree: PhD, Physics, 2015, Boston University

URL: http://hdl.handle.net/2144/14054

► This dissertation covers the two major parts of my PhD research on statistical physics and complex networks: i) modeling a new type of attack –… (more)

▼ This dissertation covers the two major parts of my PhD research on statistical physics and complex networks: i) modeling a new type of attack – localized attack, and investigating robustness of complex networks under this type of attack; ii) discovering the clustering structure in complex networks and its influence on the robustness of coupled networks. Complex networks appear in every aspect of our daily life and are widely studied in Physics, Mathematics, Biology, and Computer Science. One important property of complex networks is their robustness under attacks, which depends crucially on the nature of attacks and the structure of the networks themselves. Previous studies have focused on two types of attack: random attack and targeted attack, which, however, are insufficient to describe many real-world damages. Here we propose a new type of attack – localized attack, and study the robustness of complex networks under this type of attack, both analytically and via simulation. On the other hand, we also study the clustering structure in the network, and its influence on the robustness of a complex network system. In the first part, we propose a theoretical framework to study the robustness of complex networks under localized attack based on percolation theory and generating function method. We investigate the percolation properties, including the critical threshold of the phase transition pc and the size of the giant component P∞. We compare localized attack with random attack and find that while random regular (RR) networks are more robust against localized attack, Erd ̋os-R ́enyi (ER) networks are equally robust under both types of attacks. As for scale-free (SF) networks, their robustness depends crucially on the degree exponent λ. The simulation results show perfect agreement with theoretical predictions. We also test our model on two real-world networks: a peer-to-peer computer network and an airline network, and find that the real-world networks are much more vulnerable to localized attack compared with random attack. In the second part, we extend the tree-like generating function method to incorporating clustering structure in complex networks. We study the robustness of a complex network system, especially a network of networks (NON) with clustering structure in each network. We find that the system becomes less robust as we increase the clustering coefficient of each network. For a partially dependent network system, we also find that the influence of the clustering coefficient on network robustness decreases as we decrease the coupling strength, and the critical coupling strength qc, at which the first-order phase transition changes to second-order, increases as we increase the clustering coefficient.

Subjects/Keywords: Physics; Complex networks; Statistical physics

3 more images…

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APA (6^th Edition):

Shao, S. (2015). Robustness and structure of complex networks. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/14054

Chicago Manual of Style (16^th Edition):

Shao, Shuai. “Robustness and structure of complex networks.” 2015. Doctoral Dissertation, Boston University. Accessed January 22, 2021. http://hdl.handle.net/2144/14054.

MLA Handbook (7^th Edition):

Shao, Shuai. “Robustness and structure of complex networks.” 2015. Web. 22 Jan 2021.

Vancouver:

Shao S. Robustness and structure of complex networks. [Internet] [Doctoral dissertation]. Boston University; 2015. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/2144/14054.

Council of Science Editors:

Shao S. Robustness and structure of complex networks. [Doctoral Dissertation]. Boston University; 2015. Available from: http://hdl.handle.net/2144/14054

Boston University

24. Day, Alexandre. An application of machine learning to statistical physics: from the phases of quantum control to satisfiability problems.

Degree: PhD, Physics, 2019, Boston University

URL: http://hdl.handle.net/2144/34908

► This dissertation presents a study of machine learning methods with a focus on applications to statistical and condensed matter physics, in particular the problem of… (more)

Subjects/Keywords: Physics; Machine learning; Statistical physics

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APA (6^th Edition):

Day, A. (2019). An application of machine learning to statistical physics: from the phases of quantum control to satisfiability problems. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/34908

Chicago Manual of Style (16^th Edition):

Day, Alexandre. “An application of machine learning to statistical physics: from the phases of quantum control to satisfiability problems.” 2019. Doctoral Dissertation, Boston University. Accessed January 22, 2021. http://hdl.handle.net/2144/34908.

MLA Handbook (7^th Edition):

Day, Alexandre. “An application of machine learning to statistical physics: from the phases of quantum control to satisfiability problems.” 2019. Web. 22 Jan 2021.

Vancouver:

Day A. An application of machine learning to statistical physics: from the phases of quantum control to satisfiability problems. [Internet] [Doctoral dissertation]. Boston University; 2019. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/2144/34908.

Council of Science Editors:

Day A. An application of machine learning to statistical physics: from the phases of quantum control to satisfiability problems. [Doctoral Dissertation]. Boston University; 2019. Available from: http://hdl.handle.net/2144/34908

The Florida State University

25. Clarke, David A. Scale Setting and Topological Observables in Pure SU(2) LGT.

Degree: 2019, The Florida State University

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10935396

► In this dissertation, we investigate the approach of pure SU(2) lattice gauge theory to its continuum limit using the deconfinement temperature, six gradient scales,… (more)

Subjects/Keywords: Computational physics; Statistical physics; Physics; Theoretical physics

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APA (6^th Edition):

Clarke, D. A. (2019). Scale Setting and Topological Observables in Pure SU(2) LGT. (Thesis). The Florida State University. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10935396

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

Chicago Manual of Style (16^th Edition):

Clarke, David A. “Scale Setting and Topological Observables in Pure SU(2) LGT.” 2019. Thesis, The Florida State University. Accessed January 22, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10935396.

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

MLA Handbook (7^th Edition):

Clarke, David A. “Scale Setting and Topological Observables in Pure SU(2) LGT.” 2019. Web. 22 Jan 2021.

Vancouver:

Clarke DA. Scale Setting and Topological Observables in Pure SU(2) LGT. [Internet] [Thesis]. The Florida State University; 2019. [cited 2021 Jan 22]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10935396.

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

Council of Science Editors:

Clarke DA. Scale Setting and Topological Observables in Pure SU(2) LGT. [Thesis]. The Florida State University; 2019. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10935396

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

Johannes Gutenberg Universität Mainz

26. Ebert, Marlon Kai. Dichtefunktionaltheorie für eine Flüssigkeit harter Scheiben auf Grafikkarten.

Degree: 2012, Johannes Gutenberg Universität Mainz

URL: http://ubm.opus.hbz-nrw.de/volltexte/2012/3309/

►

Zweidimensionale Flüssigkeiten harter Scheiben sind in der Regel einfach zu simulieren, jedoch überraschend schwer theoretisch zu beschreiben. Trotz ihrer hohen Relevanz bleiben die meisten theoretischen… (more)

▼

Zweidimensionale Flüssigkeiten harter Scheiben sind in der Regel einfach zu simulieren, jedoch überraschend schwer theoretisch zu beschreiben. Trotz ihrer hohen Relevanz bleiben die meisten theoretischen Ansätze qualitativ. Hier wird eine Dichtefunktionaltheorie (DFT) vorgestellt, die erstmalig die Struktur solcher Flüssigkeiten bei hohen Dichten korrekt beschreibt und den Ansatz des Gefrierübergangs abbildet.rnEs wird gezeigt, dass der Ansatz der Fundamentalmaßtheorie zu einem solchen Funktional führt. Dabei werden sowohl Dichteverteilungen um ein Testteilchen als auch Zweiteilchen-Korrelationsfunktionen untersucht.rnGrafikkarten bieten sehr hohe Recheneffizienz und ihr Einsatz in der Wissenschaft nimmt stetig zu. In dieser Arbeit werden die Vor- und Nachteile der Grafikkarte für wissenschaftliche Berechnungen erörtert und es wird gezeigt, dass die Berechnung der DFT auf Grafikkarten effizient ausgeführt werden kann. Es wird ein Programm entwickelt, dass dies umsetzt. Dabei wird gezeigt, dass die Ergebnisse einfacher (bekannter) Funktionale mit denen von CPU-Berechnungen übereinstimmen, so dass durch die Nutzung der Grafikkarte keine systematischen Fehler zu erwarten sind.

Two dimensional hard disc fluids are easy to simulate but hard to describe theoretically. Despite their high relevance most theoretical descriptions are only qualitative.rnHere we introduce a density functional theory which will correctly describe high density hard disc fluids and which is able to show the on-set of the freezing transition.rnIt is shown that the fundamental measure theory in combination with dimensional crossover will lead to such a functional. We will show density distributions and correlation functions around one and two fixed test particles.rnGraphics cards offer a very high calculating power and efficiency and are more and more often used in scientific calculations. We will discuss the advantages and disadvantages of using graphics cards for the calculation of density functional theories and we will show that using graphics cards is effective for these kinds of problems.rnWe reproduce known results from CPU based calculations, proving the general validity of the GPU approach.

Subjects/Keywords: Dichtefunktionaltheorie; statistische Physik; Grafikkarten; Density functional theory; statistical physics; grahics cards; Physics

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APA (6^th Edition):

Ebert, M. K. (2012). Dichtefunktionaltheorie für eine Flüssigkeit harter Scheiben auf Grafikkarten. (Doctoral Dissertation). Johannes Gutenberg Universität Mainz. Retrieved from http://ubm.opus.hbz-nrw.de/volltexte/2012/3309/

Chicago Manual of Style (16^th Edition):

Ebert, Marlon Kai. “Dichtefunktionaltheorie für eine Flüssigkeit harter Scheiben auf Grafikkarten.” 2012. Doctoral Dissertation, Johannes Gutenberg Universität Mainz. Accessed January 22, 2021. http://ubm.opus.hbz-nrw.de/volltexte/2012/3309/.

MLA Handbook (7^th Edition):

Ebert, Marlon Kai. “Dichtefunktionaltheorie für eine Flüssigkeit harter Scheiben auf Grafikkarten.” 2012. Web. 22 Jan 2021.

Vancouver:

Ebert MK. Dichtefunktionaltheorie für eine Flüssigkeit harter Scheiben auf Grafikkarten. [Internet] [Doctoral dissertation]. Johannes Gutenberg Universität Mainz; 2012. [cited 2021 Jan 22]. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2012/3309/.

Council of Science Editors:

Ebert MK. Dichtefunktionaltheorie für eine Flüssigkeit harter Scheiben auf Grafikkarten. [Doctoral Dissertation]. Johannes Gutenberg Universität Mainz; 2012. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2012/3309/

Boston University

27. Li, Wei. Statistical physics approaches to complex systems.

Degree: PhD, Physics, 2013, Boston University

URL: http://hdl.handle.net/2144/15162

► This thesis utilizes statistical physics concepts and mathematical modeling to study complex systems. I investigate the emergent complexities in two systems: (i) the stock volume… (more)

Subjects/Keywords: Physics; Interdependent; Networks; Percolation; Scaling; Trading volume

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APA (6^th Edition):

Li, W. (2013). Statistical physics approaches to complex systems. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/15162

Chicago Manual of Style (16^th Edition):

Li, Wei. “Statistical physics approaches to complex systems.” 2013. Doctoral Dissertation, Boston University. Accessed January 22, 2021. http://hdl.handle.net/2144/15162.

MLA Handbook (7^th Edition):

Li, Wei. “Statistical physics approaches to complex systems.” 2013. Web. 22 Jan 2021.

Vancouver:

Li W. Statistical physics approaches to complex systems. [Internet] [Doctoral dissertation]. Boston University; 2013. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/2144/15162.

Council of Science Editors:

Li W. Statistical physics approaches to complex systems. [Doctoral Dissertation]. Boston University; 2013. Available from: http://hdl.handle.net/2144/15162

Universidade Federal de Viçosa

28. Fábio Santos Nascimento. Caracterização de filmes finos de CdTe por meio de teoria de escala anômala.

Degree: 2010, Universidade Federal de Viçosa

URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2706

►

Filmes de telureto de cádmio crescidos sobre substratos de vidro recobertos com oxido de estanho dopado com flúor (TCO) foram estudados usando a teoria de… (more)

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Filmes de telureto de cádmio crescidos sobre substratos de vidro recobertos com oxido de estanho dopado com flúor (TCO) foram estudados usando a teoria de escala dinâmica proposta por Lopez et al. [Phys. Rev. Lett. 84, 2199 (2000)]. As amostras foram crescidas por Ferreira et al. [Appl. Phys. Lett. 88, 244102 (2006)] usando a técnica de epitaxia por paredes quentes e as propriedades de escala da interface foram investigadas neste trabalho através do espectro de potência, da função de correlação de alturas e da espessura da interface. A teoria usada possui seis expoentes de escala, sendo quatro independentes. Entretanto, para classificar qual regime de crescimento o sistema obedece deve-se analisar três desses expoentes, a saber, α, αloc e αs relacionados com as flutuações globais, locais e do espectro de potência da interface, respectivamente. Os resultados mostram que o sistema estudado apresenta comportamento de escala anômalo caracterizado pelo expoente de rugosidade global diferente da rugosidade local. Mais precisamente, em acordo com a teoria usada, encontramos um regime de crescimento com interfaces facetadas caracterizadas por α loc = 1 e α ≠ α s >1. Essa previsão da teoria de escala anômala foi corroborada através de microscopia de força atômica das amostras. Conjecturamos que efeitos não-locais originados pela desordem inicial imposta pelo substrato amorfo são os fatores que originam o comportamento de escala anômalo.

Cadmium telluride films grown on glass substrates covered by fluorine doped tin oxide (TCO) were studied by generic dynamical scaling theory proposed by L ópez et al. [Phys. Rev. Lett. 84, 2199 (2000)]. The samples were grown by Ferreira et al. [Appl. Phys. Lett. 88, 244102 (2006)] using hot wall epitaxy and the interface scaling properties were investigated in this work using the power spectrum, height-height correlation function, and interface width. The theory adopted has six scaling exponents, but only four of them are independent. However, in order to classify which growth regime the system follows one should analyze three of these exponents, namely, α, αloc and αs which are related to the global, local, and power spectrum fluctuations, respectively. The results show that the studied system exhibit anomalous scaling behavior characterized by global roughness exponent di fferent from the local one. Actually, in agreement with the adopted theory we have found a growth regime ruled by faceted interfaces, characterized by αloc = 1 and α ≠ αs >1. This prediction of the anomalous scaling theory was corroborated by atomic force microscopy of the samples. We conjecture that non-local effects, caused by the initial disorder imposed by the amorphous substrate, rule the anomalous scaling.

Advisors/Committee Members: José Arnaldo Redinz, Silvio da Costa Ferreira Junior, Marcos da Silva Couto, Sukarno Olavo Ferreira, Maximiliano Luis Munford, Sérgio Galvão Coutinho.

Subjects/Keywords: FISICA DA MATERIA CONDENSADA; Leis de escala; Rugosidade anômala; CdTe; Scaling laws; Anomalous roughness; CdTe

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APA (6^th Edition):

Nascimento, F. S. (2010). Caracterização de filmes finos de CdTe por meio de teoria de escala anômala. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2706

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

Chicago Manual of Style (16^th Edition):

Nascimento, Fábio Santos. “Caracterização de filmes finos de CdTe por meio de teoria de escala anômala.” 2010. Thesis, Universidade Federal de Viçosa. Accessed January 22, 2021. http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2706.

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

MLA Handbook (7^th Edition):

Nascimento, Fábio Santos. “Caracterização de filmes finos de CdTe por meio de teoria de escala anômala.” 2010. Web. 22 Jan 2021.

Vancouver:

Nascimento FS. Caracterização de filmes finos de CdTe por meio de teoria de escala anômala. [Internet] [Thesis]. Universidade Federal de Viçosa; 2010. [cited 2021 Jan 22]. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2706.

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

Council of Science Editors:

Nascimento FS. Caracterização de filmes finos de CdTe por meio de teoria de escala anômala. [Thesis]. Universidade Federal de Viçosa; 2010. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2706

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

Universidade de Brasília

29. Felipe Luis Pereira Pinheiro. Influência das leis de escala sobre a dinâmica de populações.

Degree: 2010, Universidade de Brasília

URL: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=6949

► É bem conhecido que a formulação de equações para a dinâmica de uma população pode ser obtida com base na evolução espaço-temporal das espécies e… (more)

Subjects/Keywords: Leis de escala; dinâmica de população; FISICA; Scaling laws; metabolism; crescimento; population dynamics; growth; metabolismo

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

APA (6^th Edition):

Pinheiro, F. L. P. (2010). Influência das leis de escala sobre a dinâmica de populações. (Thesis). Universidade de Brasília. Retrieved from http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=6949

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

Chicago Manual of Style (16^th Edition):

Pinheiro, Felipe Luis Pereira. “Influência das leis de escala sobre a dinâmica de populações.” 2010. Thesis, Universidade de Brasília. Accessed January 22, 2021. http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=6949.

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

MLA Handbook (7^th Edition):

Pinheiro, Felipe Luis Pereira. “Influência das leis de escala sobre a dinâmica de populações.” 2010. Web. 22 Jan 2021.

Vancouver:

Pinheiro FLP. Influência das leis de escala sobre a dinâmica de populações. [Internet] [Thesis]. Universidade de Brasília; 2010. [cited 2021 Jan 22]. Available from: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=6949.

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

Council of Science Editors:

Pinheiro FLP. Influência das leis de escala sobre a dinâmica de populações. [Thesis]. Universidade de Brasília; 2010. Available from: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=6949

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

University of Saskatchewan

30. Tang, Zhujun. An experimental study of a plane turbulent wall jet on smooth and rough surfaces.

Degree: 2016, University of Saskatchewan

URL: http://hdl.handle.net/10388/ETD-2016-05-2567

► This study presents an experimental investigation of incomplete similarity and the effect of surface roughness on a plane turbulent wall jet on a hydraulically smooth,… (more)

▼ This study presents an experimental investigation of incomplete similarity and the effect of surface roughness on a plane turbulent wall jet on a hydraulically smooth, transitionally rough and fully rough surface based on a new set of particle image velocimetry (PIV) measurements. The focus is on examining the changes in the characteristics of the mean velocity field. Velocity measurements were taken along the centerline of the ground plane with seven fields of view (FOV) covering the entire streamwise extent, i.e. the inflow, developing and fully developed regions. In each FOV, 2,000 and 4,000 pairs of instantaneous PIV raw images were captured at a sampling frequency of 4 Hz for the smooth and rough surface cases, respectively. Four series of measurements were conducted: two series of measurements were taken on the smooth surface at two inlet flow rates corresponding to slot Reynolds numbers of 7,190 and 14,300, respectively; then the rough surface was installed and two series of measurements were taken at the same two inlet flow rates corresponding to slot Reynolds numbers of 6,660 and 13,400, which resulted in a transitionally rough and a fully rough flow condition, respectively. In-house PIV software was used to complete the cross-correlation analysis of the PIV images and the post-correlation rejection of outlier velocity vectors with a dynamic threshold neural network technique to obtain the mean and fluctuating velocity data. The results show that at the inlet boundary, the surface roughness decreases the mass flux near the wall due to the enhanced wall shear stress. In the initial developing region, which covers the first ten slot heights of streamwise distance, the enhanced wall friction associated with the rough surface shortens the potential core. The surface roughness causes the onset of the fully developed region to appear farther downstream on the rough surface than on the smooth surface. For the low flow rate (LFR) case on the rough surface, the roughness shift decreases monotonically with distance from the slot, which indicates that the effect of surface roughness on the mean velocity profile is decreasing. The profile fitting result for the fully rough case suggests that the value of von Karman’s constant κ in the logarithmic law may depend on the surface roughness. In the fully developed region, for the LFR case, the surface roughness enlarges the thicknesses of both the outer and inner layers, though this effect is much more significant for the inner layer than for the outer layer. This is also observed for the high flow rate (HFR) case, but with a much more noticeable effect of surface roughness. The surface roughness increases the spread rate of the inner layer significantly and penetrates into the outer layer, although the impact is much less for the outer layer. For the LFR case, while in general the surface roughness tends to increase the streamwise growth rate of the inner and outer half-widths, the magnitude of this effect becomes stronger as the wall-normal distance to the surface… Advisors/Committee Members: Bergstrom, Donald J., Bugg, James D., Sumner, David, Noble, Scott D., Helgason, Warren.

Subjects/Keywords: plane turbulent wall jet; incomplete similarity; scaling laws; hydrodynamic roughness; particle image velocimetry (PIV).

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

APA (6^th Edition):

Tang, Z. (2016). An experimental study of a plane turbulent wall jet on smooth and rough surfaces. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/ETD-2016-05-2567

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

Chicago Manual of Style (16^th Edition):

Tang, Zhujun. “An experimental study of a plane turbulent wall jet on smooth and rough surfaces.” 2016. Thesis, University of Saskatchewan. Accessed January 22, 2021. http://hdl.handle.net/10388/ETD-2016-05-2567.

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

MLA Handbook (7^th Edition):

Tang, Zhujun. “An experimental study of a plane turbulent wall jet on smooth and rough surfaces.” 2016. Web. 22 Jan 2021.

Vancouver:

Tang Z. An experimental study of a plane turbulent wall jet on smooth and rough surfaces. [Internet] [Thesis]. University of Saskatchewan; 2016. [cited 2021 Jan 22]. Available from: http://hdl.handle.net/10388/ETD-2016-05-2567.

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

Council of Science Editors:

Tang Z. An experimental study of a plane turbulent wall jet on smooth and rough surfaces. [Thesis]. University of Saskatchewan; 2016. Available from: http://hdl.handle.net/10388/ETD-2016-05-2567

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

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Open Access Theses and Dissertations