subject:(Computational physics)

University of Vienna

1. Höld, Mathias. Simulation of Nano Particles in a Laser-Trap.

Degree: 2017, University of Vienna

►

Optical trapping bezeichnet eine experimentelle Methode, bei der Objekte mit einer Größe, die von einer subatomaren bis zur Mikrometer-Skala reicht, durch die Gradientenkraft eines Lasers… (more)

Subjects/Keywords: 33.99 Physik: Sonstiges; Simulation / Laserfalle / Nanoteilchen / Computational Physics; Simulation / Laser trap / Nano Particle / Computational Physics

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APA (6^th Edition):

Höld, M. (2017). Simulation of Nano Particles in a Laser-Trap. (Thesis). University of Vienna. Retrieved from http://othes.univie.ac.at/45637/

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):

Höld, Mathias. “Simulation of Nano Particles in a Laser-Trap.” 2017. Thesis, University of Vienna. Accessed January 17, 2019. http://othes.univie.ac.at/45637/.

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

MLA Handbook (7^th Edition):

Höld, Mathias. “Simulation of Nano Particles in a Laser-Trap.” 2017. Web. 17 Jan 2019.

Vancouver:

Höld M. Simulation of Nano Particles in a Laser-Trap. [Internet] [Thesis]. University of Vienna; 2017. [cited 2019 Jan 17]. Available from: http://othes.univie.ac.at/45637/.

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

Council of Science Editors:

Höld M. Simulation of Nano Particles in a Laser-Trap. [Thesis]. University of Vienna; 2017. Available from: http://othes.univie.ac.at/45637/

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

University of California – Merced

2. Copenhagen, Katherine. Collective motion in behaviorally heterogeneous systems.

Degree: Physics, 2017, University of California – Merced

URL: http://www.escholarship.org/uc/item/8750d6nj

► Collective motion is a widespread phenomenon in nature where individuals actively propel themselves, gather together and move as a group. Some examples of collective motion… (more)

▼ Collective motion is a widespread phenomenon in nature where individuals actively propel themselves, gather together and move as a group. Some examples of collective motion are bird flocks, fish schools, bacteria swarms, cell clusters, and crowds of people. Many models seek to understand the effects of activity in collective systems including things such as environmental disorder, density, and interaction details primarily at infinite size limits and with uniform populations. In this dissertation I investigate the effects of finite sizes and behavioral heterogeneity as it exists in nature. Behavioral heterogeneity can originate from several different sources. Mixed populations of individuals can have inherently different behaviors such as mutant bacteria, injured fish, or agents that prefer individualistic behavior over coordinated motion. Alternatively, agents may modify their own behavior based on some local environmental dependency, such as local substrate, or density.In cases such as mutant cheaters in bacteria or malfunctioning drones in swarms, mixed populations of behaviorally heterogeneous agents can be modelled as arising in the form of aligning and non-aligning agents. When this kind of heterogeneity is introduced, there is a critical carrying capacity of non-aligners above which the system is unable to form a cohesive ordered group. However, if the cohesion of the group is relaxed to allow for fracture, the system will actively sort out non-aligning agents the system will exist at a critical non-aligner fraction. A similar heterogeneity could result in a mixture of high and low noise individuals. In this case there is also a critical carry capacity beyond which the system is unable to reach an ordered state, however the nature of this transition depends on the model details. Agents which are part of an ordered collective may vary their behavior as the group changes environments such as a flock of birds flying into a cloud. Using a unique model of a flock where the group behaves as a rigid disk reveals interesting behaviors as the system crosses a boundary between interfaces. The collective rotates and reorients or becomes stuck on the boundary as it crosses. I also investigate the effects of variable behavior depending on local density, and find that a frustration driven transient rotational phase arises in clusters where agents with low local density move faster than those with high local density as in cell clusters. All together I have shown that behavioral heterogeneity in collective motion can lead to unique phases and behaviors that are not seen in their homogeneous counterparts.

Subjects/Keywords: Biophysics; Computational physics

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APA (6^th Edition):

Copenhagen, K. (2017). Collective motion in behaviorally heterogeneous systems. (Thesis). University of California – Merced. Retrieved from http://www.escholarship.org/uc/item/8750d6nj

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):

Copenhagen, Katherine. “Collective motion in behaviorally heterogeneous systems.” 2017. Thesis, University of California – Merced. Accessed January 17, 2019. http://www.escholarship.org/uc/item/8750d6nj.

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

MLA Handbook (7^th Edition):

Copenhagen, Katherine. “Collective motion in behaviorally heterogeneous systems.” 2017. Web. 17 Jan 2019.

Vancouver:

Copenhagen K. Collective motion in behaviorally heterogeneous systems. [Internet] [Thesis]. University of California – Merced; 2017. [cited 2019 Jan 17]. Available from: http://www.escholarship.org/uc/item/8750d6nj.

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

Council of Science Editors:

Copenhagen K. Collective motion in behaviorally heterogeneous systems. [Thesis]. University of California – Merced; 2017. Available from: http://www.escholarship.org/uc/item/8750d6nj

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

3. Stirewalt, Heather R. Computation as a Model Building Tool in a High School Physics Classroom.

Degree: 2018, California State University, Long Beach

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10785706

► The Next Generation Science Standards (NGSS) have established computational thinking as one of the science and engineering practices that should be developed in high… (more)

Subjects/Keywords: Computational physics; Education; Physics

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APA (6^th Edition):

Stirewalt, H. R. (2018). Computation as a Model Building Tool in a High School Physics Classroom. (Thesis). California State University, Long Beach. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10785706

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):

Stirewalt, Heather R. “Computation as a Model Building Tool in a High School Physics Classroom.” 2018. Thesis, California State University, Long Beach. Accessed January 17, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10785706.

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

MLA Handbook (7^th Edition):

Stirewalt, Heather R. “Computation as a Model Building Tool in a High School Physics Classroom.” 2018. Web. 17 Jan 2019.

Vancouver:

Stirewalt HR. Computation as a Model Building Tool in a High School Physics Classroom. [Internet] [Thesis]. California State University, Long Beach; 2018. [cited 2019 Jan 17]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10785706.

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

Council of Science Editors:

Stirewalt HR. Computation as a Model Building Tool in a High School Physics Classroom. [Thesis]. California State University, Long Beach; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10785706

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

University of California, San Diego

4. Kaardal, Joel Thomas. Decoding the Computations of Sensory Neurons.

Degree: 2018, University of California, San Diego

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10633582

► The nervous system encodes information about external stimuli through sophisticated computations performed by vast networks of sensory neurons. Since the space of all possible… (more)

Subjects/Keywords: Computational physics; Neurosciences; Biophysics

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APA (6^th Edition):

Kaardal, J. T. (2018). Decoding the Computations of Sensory Neurons. (Thesis). University of California, San Diego. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10633582

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):

Kaardal, Joel Thomas. “Decoding the Computations of Sensory Neurons.” 2018. Thesis, University of California, San Diego. Accessed January 17, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10633582.

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

MLA Handbook (7^th Edition):

Kaardal, Joel Thomas. “Decoding the Computations of Sensory Neurons.” 2018. Web. 17 Jan 2019.

Vancouver:

Kaardal JT. Decoding the Computations of Sensory Neurons. [Internet] [Thesis]. University of California, San Diego; 2018. [cited 2019 Jan 17]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10633582.

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

Council of Science Editors:

Kaardal JT. Decoding the Computations of Sensory Neurons. [Thesis]. University of California, San Diego; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10633582

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

Georgia State University

5. Aiken, John M. Transforming High School Physics With Modeling And Computation.

Degree: MS, Physics and Astronomy, 2013, Georgia State University

URL: https://scholarworks.gsu.edu/phy_astr_theses/18

► The Engage to Excel (PCAST) report, the National Research Council's Framework for K-12 Science Education, and the Next Generation Science Standards all call for… (more)

Subjects/Keywords: Computational Modeling; Physics; Education

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APA (6^th Edition):

Aiken, J. M. (2013). Transforming High School Physics With Modeling And Computation. (Thesis). Georgia State University. Retrieved from https://scholarworks.gsu.edu/phy_astr_theses/18

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):

Aiken, John M. “Transforming High School Physics With Modeling And Computation.” 2013. Thesis, Georgia State University. Accessed January 17, 2019. https://scholarworks.gsu.edu/phy_astr_theses/18.

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

MLA Handbook (7^th Edition):

Aiken, John M. “Transforming High School Physics With Modeling And Computation.” 2013. Web. 17 Jan 2019.

Vancouver:

Aiken JM. Transforming High School Physics With Modeling And Computation. [Internet] [Thesis]. Georgia State University; 2013. [cited 2019 Jan 17]. Available from: https://scholarworks.gsu.edu/phy_astr_theses/18.

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

Council of Science Editors:

Aiken JM. Transforming High School Physics With Modeling And Computation. [Thesis]. Georgia State University; 2013. Available from: https://scholarworks.gsu.edu/phy_astr_theses/18

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

6. Fedak, Adam. A Compact Fourth-Order Finite Volume Method for Structured Curvilinear Grids.

Degree: 2018, University of California, Davis

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10682563

► A fourth-order accurate finite volume method for curvilinear grids based on Hermitian interpolation and splines is here presented in one and two dimensions. The… (more)

Subjects/Keywords: Computational physics; Aerospace engineering

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

APA (6^th Edition):

Fedak, A. (2018). A Compact Fourth-Order Finite Volume Method for Structured Curvilinear Grids. (Thesis). University of California, Davis. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10682563

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):

Fedak, Adam. “A Compact Fourth-Order Finite Volume Method for Structured Curvilinear Grids.” 2018. Thesis, University of California, Davis. Accessed January 17, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10682563.

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

MLA Handbook (7^th Edition):

Fedak, Adam. “A Compact Fourth-Order Finite Volume Method for Structured Curvilinear Grids.” 2018. Web. 17 Jan 2019.

Vancouver:

Fedak A. A Compact Fourth-Order Finite Volume Method for Structured Curvilinear Grids. [Internet] [Thesis]. University of California, Davis; 2018. [cited 2019 Jan 17]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10682563.

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

Council of Science Editors:

Fedak A. A Compact Fourth-Order Finite Volume Method for Structured Curvilinear Grids. [Thesis]. University of California, Davis; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10682563

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

Colorado School of Mines

7. Wang, Cong. A Multi-Scale, Multi-Continuum and Multi-Physics Model to Simulate Coupled Fluid Flow and Geomechanics in Shale Gas Reservoirs.

Degree: 2018, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10684514

► In this study, several efficient and accurate mathematical models and numerical solutions to unconventional reservoir development problems are developed. The first is the three-dimensional… (more)

Subjects/Keywords: Computational physics; Engineering; Petroleum engineering

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

APA (6^th Edition):

Wang, C. (2018). A Multi-Scale, Multi-Continuum and Multi-Physics Model to Simulate Coupled Fluid Flow and Geomechanics in Shale Gas Reservoirs. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10684514

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

Chicago Manual of Style (16^th Edition):

Wang, Cong. “A Multi-Scale, Multi-Continuum and Multi-Physics Model to Simulate Coupled Fluid Flow and Geomechanics in Shale Gas Reservoirs.” 2018. Thesis, Colorado School of Mines. Accessed January 17, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10684514.

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

MLA Handbook (7^th Edition):

Wang, Cong. “A Multi-Scale, Multi-Continuum and Multi-Physics Model to Simulate Coupled Fluid Flow and Geomechanics in Shale Gas Reservoirs.” 2018. Web. 17 Jan 2019.

Vancouver:

Wang C. A Multi-Scale, Multi-Continuum and Multi-Physics Model to Simulate Coupled Fluid Flow and Geomechanics in Shale Gas Reservoirs. [Internet] [Thesis]. Colorado School of Mines; 2018. [cited 2019 Jan 17]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10684514.

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

Council of Science Editors:

Wang C. A Multi-Scale, Multi-Continuum and Multi-Physics Model to Simulate Coupled Fluid Flow and Geomechanics in Shale Gas Reservoirs. [Thesis]. Colorado School of Mines; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10684514

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

8. Giffin, Brian Doran. Partitioned Polytopal Finite-Element Methods for Nonlinear Solid Mechanics.

Degree: 2018, University of California, Davis

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10752138

► This work presents a novel polytopal finite-element framework that addresses the collective issues of discretization sensitivity and mesh generation for computational solid mechanics problems.… (more)

Subjects/Keywords: Computational physics; Mechanics; Applied mathematics

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APA (6^th Edition):

Giffin, B. D. (2018). Partitioned Polytopal Finite-Element Methods for Nonlinear Solid Mechanics. (Thesis). University of California, Davis. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10752138

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):

Giffin, Brian Doran. “Partitioned Polytopal Finite-Element Methods for Nonlinear Solid Mechanics.” 2018. Thesis, University of California, Davis. Accessed January 17, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10752138.

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

MLA Handbook (7^th Edition):

Giffin, Brian Doran. “Partitioned Polytopal Finite-Element Methods for Nonlinear Solid Mechanics.” 2018. Web. 17 Jan 2019.

Vancouver:

Giffin BD. Partitioned Polytopal Finite-Element Methods for Nonlinear Solid Mechanics. [Internet] [Thesis]. University of California, Davis; 2018. [cited 2019 Jan 17]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10752138.

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

Council of Science Editors:

Giffin BD. Partitioned Polytopal Finite-Element Methods for Nonlinear Solid Mechanics. [Thesis]. University of California, Davis; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10752138

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

9. Wang, Shaokang Jerry. Analysis of Stability and Noise in Passively Modelocked Comb Lasers.

Degree: 2018, University of Maryland, Baltimore County

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10840412

► The search for robust, low-noise modelocked comb sources has attracted significant attention during the last two decades. Passively modelocked fiber lasers are among the… (more)

▼ The search for robust, low-noise modelocked comb sources has attracted significant attention during the last two decades. Passively modelocked fiber lasers are among the most attractive comb sources. The most important design problems for a passively modelocked laser include: (1) finding a region in the laser’s adjustable parameter space where it operates stably, (2) optimizing the pulse profile within that region, and (3) lowering the noise level. Adjustable parameters will typically include the cavity length, the pump power, and the amplifier gain, which may be a function of the pump power, the pump wavelength, and both the material and geometry of the gain medium. There are two basic computational approaches for modeling passively modelocked laser systems: the evolutionary approach and the dynamical approach. In the evolutionary approach, which replicates the physical behavior of the laser, one launches light into the simulated laser and follows it for many round trips in the laser. If one obtains a stationary or periodically-stationary modelocked pulse, the laser is deemed stable and, if no such pulse is found, the laser is deemed unstable. The effect of noise can be studied by using a random number generator to add computational noise. In the dynamical approach, one first obtains a single modelocked pulse solution either analytically or by using the evolutionary approach. Next, one finds the pulse parameters as the laser parameters vary by solving a root-finding algorithm. One then linearizes the evolution equations about the steady-state solution and determines the eigenvalues of the linearized equation, which we refer to as the equation’s dynamical spectrum. If any eigenvalue has a positive real part, then the modelocked pulse is unstable. The effect of noise can be determined by calculating the noise that enters each of the modes in the dynamical spectrum, whose amplitudes are described by either a Langevin process or a random walk process. The evolutionary approach is intuitive and straightforward to program, and it is widely used. However, it is computationally time-consuming to determine the stable operating regions and can give ambiguous results near a stability boundary. When evaluating the noise levels, Monte Carlo simulations, which are based upon the evolutionary approach, are often prohibitively expensive computationally. By comparison, the dynamical approach is more difficult to program, but it is computationally rapid, yields unambiguous results for the stability, and avoids computationally expensive Monte Carlo simulations. The two approaches are complementary to each other. However, the dynamical approach can be a powerful tool for system design and optimization and has historically been undertilized. In this dissertation, we discuss the dynamical approach that we have developed for design and optimization of passively modelocked laser systems. This approach provides deep insights into the instability mechanisms of the laser that impact or limit…

Subjects/Keywords: Computational physics; Electrical engineering; Optics

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

APA (6^th Edition):

Wang, S. J. (2018). Analysis of Stability and Noise in Passively Modelocked Comb Lasers. (Thesis). University of Maryland, Baltimore County. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10840412

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

Chicago Manual of Style (16^th Edition):

Wang, Shaokang Jerry. “Analysis of Stability and Noise in Passively Modelocked Comb Lasers.” 2018. Thesis, University of Maryland, Baltimore County. Accessed January 17, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10840412.

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

MLA Handbook (7^th Edition):

Wang, Shaokang Jerry. “Analysis of Stability and Noise in Passively Modelocked Comb Lasers.” 2018. Web. 17 Jan 2019.

Vancouver:

Wang SJ. Analysis of Stability and Noise in Passively Modelocked Comb Lasers. [Internet] [Thesis]. University of Maryland, Baltimore County; 2018. [cited 2019 Jan 17]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10840412.

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

Council of Science Editors:

Wang SJ. Analysis of Stability and Noise in Passively Modelocked Comb Lasers. [Thesis]. University of Maryland, Baltimore County; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10840412

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

10. Nagai, Toshiki. Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems.

Degree: 2018, University of Colorado at Boulder

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10844711

► This thesis presents a space-time extended finite element method (space-time XFEM) based on the Heaviside enrichment for transient problems with moving interfaces, and its… (more)

▼ This thesis presents a space-time extended finite element method (space-time XFEM) based on the Heaviside enrichment for transient problems with moving interfaces, and its applications to the fluid-structure interaction (FSI) analysis. The Heaviside-enriched XFEM is a promising method to discretize partial differential equations with discontinuities in space. However, significant approximation errors are introduced by time stepping schemes when the interface geometry changes in time. The proposed space-time XFEM applies the finite element discretization and the Heaviside enrichment in both space and time with elements forming a space-time slab. A simple space-time scheme is introduced to integrate the weak form of the governing equations. This scheme considers spatial intersection configuration at multiple temporal integration points. Standard spatial integration techniques can be applied for each spatial configuration. Nitsche's method and the face-oriented ghost-penalty method are extended to the proposed space-time XFEM formulation. The stability, accuracy and flexibility of the space-time XFEM for various interface conditions including moving interfaces are demonstrated with structural and fluid problems. Moreover, the space-time XFEM enables analyzing complex FSI problems using moving interfaces, such as FSI with contact. Two FSI methods using moving interfaces (full-Eulerian FSI and Lagrangian-immersed FSI) are studied. The Lagrangian-immersed FSI method is a mixed formulation of Lagrangian and Eulerian descriptions. As solid and fluid meshes are independently defined, the FSI is computed between non-matching interfaces based on Nitsche's method and projection techniques adopted from computational contact mechanics. The stabilized Lagrange multiplier method is used for contact. Numerical examples of FSI and FSI-contact problems provide insight into the characteristics of the combination of the space-time XFEM and the Lagrangian-immersed FSI method. The proposed combination is a promising method which has the versatility for various multi-physics simulations and the applicability such as optimization.

Subjects/Keywords: Fluid mechanics; Computational physics

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APA (6^th Edition):

Nagai, T. (2018). Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems. (Thesis). University of Colorado at Boulder. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10844711

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):

Nagai, Toshiki. “Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems.” 2018. Thesis, University of Colorado at Boulder. Accessed January 17, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10844711.

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

MLA Handbook (7^th Edition):

Nagai, Toshiki. “Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems.” 2018. Web. 17 Jan 2019.

Vancouver:

Nagai T. Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems. [Internet] [Thesis]. University of Colorado at Boulder; 2018. [cited 2019 Jan 17]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10844711.

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

Council of Science Editors:

Nagai T. Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems. [Thesis]. University of Colorado at Boulder; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10844711

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

Case Western Reserve University

11. Lukashev, Pavel. Crystal and Electronic Structure of Copper Sulfides.

Degree: PhD, Physics, 2007, Case Western Reserve University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=case1164213394

► Copper sulfides with different copper concentration exist in mineral form ranging from CuS to Cu₂S. Among these, chalcosite Cu₂S, and digenite Cu_1.8S were the… (more)

▼ Copper sulfides with different copper concentration exist in mineral form ranging from CuS to Cu₂S. Among these, chalcosite Cu₂S, and digenite Cu_1.8S were the subject of extensive research for decades mainly because of their use as the absorber in photovoltaic cells. Yet, their electronic structure is poorly understood because their crystal structure is complex. Most of the results published so far report the semiconducting nature of these compounds with the energy band gap being in the range of 0.84 to 1.9 eV. The crystal structure consists of a close-packed lattice of S with mobile Cu occupying various types of interstitial sites with a statistical distribution depending on temperature. In this thesis we present the first computational study of their electronic band structure. Initially, we investigated the simpler antifluorite structure. Both local density approximation (LDA) and self-consistent quasiparticle GW calculations with the full-potential linearized muffin-tin orbital method give a semimetallic band structure. Inspection of the nature of the bands shows that the lowest conduction band is mainly Cu-s-like except right near the center of the Brillouin zone where a Cu-s-like state lies about 1 eV below the valence band maximum. Significantly, in GW calculations, this state shifts up by several 0.1 eV but not sufficiently to open a gap. A random distortion of the Cu atoms from the perfect antifluorite positions is found to break the degeneracy of the d state at the Gamma-point and thus opens up a small gap of about 0.1 eV in LDA. As our next step we constructed supercell models for the cubic and hexagonal phases with the Cu positions determined by a weighted random number generator. The low temperature monoclinic phase was also studied. The computed total energies of these structures follow the same order as the reported phases with increasing temperatures. All these models gave similar small band gaps of order 0.1 – 0.2 eV. However, their conduction band is now mainly s-like and addition of an expected Cu-s level shift opens the gap to about 0.5 eV. Some simpler hexagonal model structures gave slightly larger band gap but were found to be unrealistic. The optical absorption data all show a strong intraband absorption with a minimum in absorption at about 1 eV. Our calculations suggest a significantly lower gap of order 0.5 eV with low absorption cross section, the true nature of which is masked by the free carrier absorption. As part of our study of the related Cu-compounds, we analyzed the quasiparticle effects beyond LDA obtained from a GW calculation on the effective masses and Kohn-Luttinger hamiltonian parameters for CuBr. Advisors/Committee Members: Lambrecht, Walter (Advisor).

Subjects/Keywords: Physics, Condensed Matter; electronic structure; computational physics

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APA (6^th Edition):

Lukashev, P. (2007). Crystal and Electronic Structure of Copper Sulfides. (Doctoral Dissertation). Case Western Reserve University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=case1164213394

Chicago Manual of Style (16^th Edition):

Lukashev, Pavel. “Crystal and Electronic Structure of Copper Sulfides.” 2007. Doctoral Dissertation, Case Western Reserve University. Accessed January 17, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1164213394.

MLA Handbook (7^th Edition):

Lukashev, Pavel. “Crystal and Electronic Structure of Copper Sulfides.” 2007. Web. 17 Jan 2019.

Vancouver:

Lukashev P. Crystal and Electronic Structure of Copper Sulfides. [Internet] [Doctoral dissertation]. Case Western Reserve University; 2007. [cited 2019 Jan 17]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=case1164213394.

Council of Science Editors:

Lukashev P. Crystal and Electronic Structure of Copper Sulfides. [Doctoral Dissertation]. Case Western Reserve University; 2007. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=case1164213394

University of Waterloo

12. Murray, Ryan. Tunnel Ionization in Strong Fields in atoms and molecules and its applications.

Degree: 2011, University of Waterloo

URL: http://hdl.handle.net/10012/5863

► We look at the theory of ionization of atoms and molecules in the presence of a strong laser field. The history of ionization of atoms… (more)

Subjects/Keywords: atomic physics; femtosecond; molecular physics; attosecond; computational

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APA (6^th Edition):

Murray, R. (2011). Tunnel Ionization in Strong Fields in atoms and molecules and its applications. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/5863

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):

Murray, Ryan. “Tunnel Ionization in Strong Fields in atoms and molecules and its applications.” 2011. Thesis, University of Waterloo. Accessed January 17, 2019. http://hdl.handle.net/10012/5863.

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

MLA Handbook (7^th Edition):

Murray, Ryan. “Tunnel Ionization in Strong Fields in atoms and molecules and its applications.” 2011. Web. 17 Jan 2019.

Vancouver:

Murray R. Tunnel Ionization in Strong Fields in atoms and molecules and its applications. [Internet] [Thesis]. University of Waterloo; 2011. [cited 2019 Jan 17]. Available from: http://hdl.handle.net/10012/5863.

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

Council of Science Editors:

Murray R. Tunnel Ionization in Strong Fields in atoms and molecules and its applications. [Thesis]. University of Waterloo; 2011. Available from: http://hdl.handle.net/10012/5863

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

ETH Zürich

13. Solórzano, Sergio. Transport: Lattice Kinetic Methods & Thermal Rectification Phenomena.

Degree: 2017, ETH Zürich

URL: http://hdl.handle.net/20.500.11850/228259

Subjects/Keywords: physics; Computational physics

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APA (6^th Edition):

Solórzano, S. (2017). Transport: Lattice Kinetic Methods & Thermal Rectification Phenomena. (Doctoral Dissertation). ETH Zürich. Retrieved from http://hdl.handle.net/20.500.11850/228259

Chicago Manual of Style (16^th Edition):

Solórzano, Sergio. “Transport: Lattice Kinetic Methods & Thermal Rectification Phenomena.” 2017. Doctoral Dissertation, ETH Zürich. Accessed January 17, 2019. http://hdl.handle.net/20.500.11850/228259.

MLA Handbook (7^th Edition):

Solórzano, Sergio. “Transport: Lattice Kinetic Methods & Thermal Rectification Phenomena.” 2017. Web. 17 Jan 2019.

Vancouver:

Solórzano S. Transport: Lattice Kinetic Methods & Thermal Rectification Phenomena. [Internet] [Doctoral dissertation]. ETH Zürich; 2017. [cited 2019 Jan 17]. Available from: http://hdl.handle.net/20.500.11850/228259.

Council of Science Editors:

Solórzano S. Transport: Lattice Kinetic Methods & Thermal Rectification Phenomena. [Doctoral Dissertation]. ETH Zürich; 2017. Available from: http://hdl.handle.net/20.500.11850/228259

14. Stefferson, Michael W. Dynamics of Crowded and Active Biological Systems.

Degree: 2018, University of Colorado at Boulder

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10823834

► Interactions between particles and their environment can alter the dynamics of biological systems. In crowded media like the cell, interactions with obstacles can introduce… (more)

Subjects/Keywords: Computational physics; Condensed matter physics; Biophysics

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APA (6^th Edition):

Stefferson, M. W. (2018). Dynamics of Crowded and Active Biological Systems. (Thesis). University of Colorado at Boulder. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10823834

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):

Stefferson, Michael W. “Dynamics of Crowded and Active Biological Systems.” 2018. Thesis, University of Colorado at Boulder. Accessed January 17, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10823834.

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

MLA Handbook (7^th Edition):

Stefferson, Michael W. “Dynamics of Crowded and Active Biological Systems.” 2018. Web. 17 Jan 2019.

Vancouver:

Stefferson MW. Dynamics of Crowded and Active Biological Systems. [Internet] [Thesis]. University of Colorado at Boulder; 2018. [cited 2019 Jan 17]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10823834.

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

Council of Science Editors:

Stefferson MW. Dynamics of Crowded and Active Biological Systems. [Thesis]. University of Colorado at Boulder; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10823834

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

Johannes Gutenberg Universität Mainz

15. Diaz Ochoa, Juan G. Theoretical investigation of the interaction of a polymer film with a nanoparticle.

Degree: 2005, Johannes Gutenberg Universität Mainz

URL: http://ubm.opus.hbz-nrw.de/volltexte/2005/856/

► The fundamental aim in our investigation of the interaction of a polymer film with a nanoparticle is the extraction of information on the dynamics of… (more)

▼ The fundamental aim in our investigation of the interaction of a polymer film with a nanoparticle is the extraction of information on the dynamics of the liquid using a single tracking particle. In this work two theoretical methods were used: one passive, where the motion of the particle measures the dynamics of the liquid, one active, where perturbations in the system are introduced through the particle. In the first part of this investigation a thin polymeric film on a substrate is studied using molecular dynamics simulations. The polymer is modeled via a 'bead spring' model. The particle is spheric and non structured and is able to interact with the monomers via a Lennard Jones potential. The system is micro-canonical and simulations were performed for average temperatures between the glass transition temperature of the film and its dewetting temperature. It is shown that the stability of the nanoparticle on the polymer film in the absence of gravity depends strongly on the form of the chosen interaction potential between nanoparticle and polymer. The relative position of the tracking particle to the liquid vapor interface of the polymer film shows the glass transition of the latter. The velocity correlation function and the mean square displacement of the particle has shown that it is caged when the temperature is close to the glass transition temperature. The analysis of the dynamics at long times shows the coupling of the nanoparticle to the center of mass of the polymer chains. The use of the Stokes-Einstein formula, which relates the diffusion coefficient to the viscosity, permits to use the nanoparticle as a probe for the determination of the bulk viscosity of the melt, the so called 'microrheology'. It is shown that for low frequencies the result obtained using microrheology coincides with the results of the Rouse model applied to the polymer dynamics. In the second part of this investigation the equations of Linear Hydrodynamics are solved for a nanoparticle oscillating above the film. It is shown that compressible liquids have mechanical response to external perturbations induced with the nanoparticle. These solutions show strong velocity and pressure profiles of the liquid near the interface, as well as a mechanical response of the liquid-vapor interface. The results obtained with this calculations can be employed for the interpretation of experimental results of non contact AFM microscopy

Subjects/Keywords: Stochastik, Brownsche Bewegung, Polymer Physik, Computational Physik, Hydrodynamik; Stochastics, Brownian Motion, Polymer Physics, Computational Physics, Hydrodynamics; Physics

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APA (6^th Edition):

Diaz Ochoa, J. G. (2005). Theoretical investigation of the interaction of a polymer film with a nanoparticle. (Doctoral Dissertation). Johannes Gutenberg Universität Mainz. Retrieved from http://ubm.opus.hbz-nrw.de/volltexte/2005/856/

Chicago Manual of Style (16^th Edition):

Diaz Ochoa, Juan G. “Theoretical investigation of the interaction of a polymer film with a nanoparticle.” 2005. Doctoral Dissertation, Johannes Gutenberg Universität Mainz. Accessed January 17, 2019. http://ubm.opus.hbz-nrw.de/volltexte/2005/856/.

MLA Handbook (7^th Edition):

Diaz Ochoa, Juan G. “Theoretical investigation of the interaction of a polymer film with a nanoparticle.” 2005. Web. 17 Jan 2019.

Vancouver:

Diaz Ochoa JG. Theoretical investigation of the interaction of a polymer film with a nanoparticle. [Internet] [Doctoral dissertation]. Johannes Gutenberg Universität Mainz; 2005. [cited 2019 Jan 17]. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2005/856/.

Council of Science Editors:

Diaz Ochoa JG. Theoretical investigation of the interaction of a polymer film with a nanoparticle. [Doctoral Dissertation]. Johannes Gutenberg Universität Mainz; 2005. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2005/856/

University of California – Berkeley

16. Yuen, Albert. Passive Focusing of Intense Ion Beams.

Degree: Nuclear Engineering, 2016, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/20v479dc

► The radial control of high current ion beams from induction accelerators or generated by short pulsed intense laser-plasma interactions is generally limited by Coulomb repulsion… (more)

Subjects/Keywords: Physics; Plasma physics; Nuclear engineering; Accelerator Physics; Beam Physics; Computational Physics; Plasma Physics

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APA (6^th Edition):

Yuen, A. (2016). Passive Focusing of Intense Ion Beams. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/20v479dc

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):

Yuen, Albert. “Passive Focusing of Intense Ion Beams.” 2016. Thesis, University of California – Berkeley. Accessed January 17, 2019. http://www.escholarship.org/uc/item/20v479dc.

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

MLA Handbook (7^th Edition):

Yuen, Albert. “Passive Focusing of Intense Ion Beams.” 2016. Web. 17 Jan 2019.

Vancouver:

Yuen A. Passive Focusing of Intense Ion Beams. [Internet] [Thesis]. University of California – Berkeley; 2016. [cited 2019 Jan 17]. Available from: http://www.escholarship.org/uc/item/20v479dc.

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

Council of Science Editors:

Yuen A. Passive Focusing of Intense Ion Beams. [Thesis]. University of California – Berkeley; 2016. Available from: http://www.escholarship.org/uc/item/20v479dc

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

Linköping University

17. Fransson, Thomas. Chemical bond analysis in the ten-electron series.

Degree: Chemistry and Biology, 2009, Linköping University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19554

► This thesis presents briefly the application of quantum mechanics on systems ofchemical interest, i.e., the field of quantum chemistry and computational chemistry.The molecules of… (more)

Subjects/Keywords: computational physics; computational chemistry; quantum chemistry; bond analysis; electron population; electron transfer; Chemical physics; Kemisk fysik; Computational physics; Beräkningsfysik

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APA (6^th Edition):

Fransson, T. (2009). Chemical bond analysis in the ten-electron series. (Thesis). Linköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19554

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):

Fransson, Thomas. “Chemical bond analysis in the ten-electron series.” 2009. Thesis, Linköping University. Accessed January 17, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19554.

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

MLA Handbook (7^th Edition):

Fransson, Thomas. “Chemical bond analysis in the ten-electron series.” 2009. Web. 17 Jan 2019.

Vancouver:

Fransson T. Chemical bond analysis in the ten-electron series. [Internet] [Thesis]. Linköping University; 2009. [cited 2019 Jan 17]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19554.

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

Council of Science Editors:

Fransson T. Chemical bond analysis in the ten-electron series. [Thesis]. Linköping University; 2009. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19554

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

Universiteit Utrecht

18. Rottier, O.G. One-loop corrections at future linear colliders.

Degree: 2014, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/297077

► In order to benefit from high precision measurements at a future Linear Collider, we need to go beyond the tree level for cross section calculations… (more)

Subjects/Keywords: High energy physics; Particle physics; Phenomenology; Computational physics; Higgs

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APA (6^th Edition):

Rottier, O. G. (2014). One-loop corrections at future linear colliders. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/297077

Chicago Manual of Style (16^th Edition):

Rottier, O G. “One-loop corrections at future linear colliders.” 2014. Masters Thesis, Universiteit Utrecht. Accessed January 17, 2019. http://dspace.library.uu.nl:8080/handle/1874/297077.

MLA Handbook (7^th Edition):

Rottier, O G. “One-loop corrections at future linear colliders.” 2014. Web. 17 Jan 2019.

Vancouver:

Rottier OG. One-loop corrections at future linear colliders. [Internet] [Masters thesis]. Universiteit Utrecht; 2014. [cited 2019 Jan 17]. Available from: http://dspace.library.uu.nl:8080/handle/1874/297077.

Council of Science Editors:

Rottier OG. One-loop corrections at future linear colliders. [Masters Thesis]. Universiteit Utrecht; 2014. Available from: http://dspace.library.uu.nl:8080/handle/1874/297077

University of Arizona

19. Khan, Souratosh. Theory of Transient Excited State Absorptions in Molecular Crystals and Dimers : Effects of Electron Correlations and their Role in Singlet Fission .

Degree: 2018, University of Arizona

URL: http://hdl.handle.net/10150/631402

► Singlet fission (SF), in which a photoexcted spin singlet exciton dissociates into a pair of low lying triplet excitons has the potential to overcome the… (more)

▼ Singlet fission (SF), in which a photoexcted spin singlet exciton dissociates into a pair of low lying triplet excitons has the potential to overcome the Shockley-Quessier limit of conventional solar cells. It is well understood that a key intermediate - the multiexcitonic, quantum entangled ¹(TT)₁ state plays a vital role in making the process spin-allowed. Early experiments based on transient absorption spectroscopy (TA) conducted on molecular crystals and dimers of organic molecules reported highly efficient SF. However, with the emergence of optical probes in the infra-red (IR) regime, the ``bound'' triplet pair state has been shown to be stable against decoherence thereby raising questions on SF itself. In this thesis, within a correlated electron model, we report calculations of excited state absorptions (ESAs) from the singlet and triplet excitons and from the triplet-triplet biexciton for pentacene crystal and dimers. We formulate a broad theory of quantum entanglement of triplet-triplet state in these molecular systems and show that spectroscopic differences in the ESA signals between free and bound triplets exist beyond the visible. The triplet exciton primarily absorbs in the visible and any near IR (NIR) absorption depends on the strength of the intermolecular coupling. In contrast, the ¹(TT)₁ state has additional weak ESA in the IR. In the dimers, we show that entanglement between triplets is a function of the proximity as well as the steric hindrance between the molecular chromophores. A weak signal from the singlet exciton is found in the IR and attributed to a transition to a different kind of triplet-triplet state. In summary, our theory of ESA can be extended to other weakly coupled bimolecular systems without any loss of generality. Advisors/Committee Members: Mazumdar, Sumitendra (advisor), Stafford, Charles A. (committeemember), Monti Masel, Oliver L A (committeemember), Hassan, Mohammed (committeemember), Schaibley, John R. (committeemember).

Subjects/Keywords: Chemical Physics; Computational Physics; Condensed Matter Physics; Organic Photovoltaics

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APA (6^th Edition):

Khan, S. (2018). Theory of Transient Excited State Absorptions in Molecular Crystals and Dimers : Effects of Electron Correlations and their Role in Singlet Fission . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/631402

Chicago Manual of Style (16^th Edition):

Khan, Souratosh. “Theory of Transient Excited State Absorptions in Molecular Crystals and Dimers : Effects of Electron Correlations and their Role in Singlet Fission .” 2018. Doctoral Dissertation, University of Arizona. Accessed January 17, 2019. http://hdl.handle.net/10150/631402.

MLA Handbook (7^th Edition):

Khan, Souratosh. “Theory of Transient Excited State Absorptions in Molecular Crystals and Dimers : Effects of Electron Correlations and their Role in Singlet Fission .” 2018. Web. 17 Jan 2019.

Vancouver:

Khan S. Theory of Transient Excited State Absorptions in Molecular Crystals and Dimers : Effects of Electron Correlations and their Role in Singlet Fission . [Internet] [Doctoral dissertation]. University of Arizona; 2018. [cited 2019 Jan 17]. Available from: http://hdl.handle.net/10150/631402.

Council of Science Editors:

Khan S. Theory of Transient Excited State Absorptions in Molecular Crystals and Dimers : Effects of Electron Correlations and their Role in Singlet Fission . [Doctoral Dissertation]. University of Arizona; 2018. Available from: http://hdl.handle.net/10150/631402

Boston University

20. Tang, Ying. Quantum Monte Carlo studies of quantum criticality in low-dimensional spin systems.

Degree: PhD, Physics, 2014, Boston University

URL: http://hdl.handle.net/2144/14301

► Strongly correlated low-dimensional quantum spin models provide a well-established frame- work to study magnetic properties of insulators, and are of great theoretical interest and experimental… (more)

▼ Strongly correlated low-dimensional quantum spin models provide a well-established frame- work to study magnetic properties of insulators, and are of great theoretical interest and experimental relevance in condensed-matter physics. In this thesis, I use quantum Monte Carlo methods to numerically study quantum critical behavior in low-dimensional quantum spin models and wavefunctions. First, I study spinons &ndash emergent spin-1/2 bosonic excitations &ndash at certain one- and two-dimensional quantum phase transitions (QPTs) in spin models, by characterizing their size and confinement length quantitatively. In particular, I focus on the QPT from an antiferromagnetic (AFM) phase into a valence-bond solid (VBS) phase, which is an example of a violation of the standard Landau-Ginzburg-Wilson paradigm for phase transitions. This transition in two dimensions (2D) is instead likely described by a novel theory called "deconfined quantum criticality" (DQC). According to the theory, spinons should be deconfined. The degree of deconfinement is quantified in my calculations. Second, I present a comprehensive study of so-called short-bond resonating-valence-bond (RVB) spin liquids in 2D, which have been suggested as a good starting point for understanding the spin physics of high-temperature cuprates. I find that these RVB states can also be classified as quantum-critical VBS states, which indicates that RVB is less disordered than expected. This work suggests a possible mapping from the quantum RVB states to classical dimer models via a classical continuum field theory – the height model. This map explicitly bridges well-established classical results to future quantum studies. Third, I consider 1D amplitude product (AP) states, which are generalized versions of RVB states, with different wavefunction weightings of bonds according to their lengths. AP states constitute a good ansatz for certain Hamiltonians and are of broad interest in quantum magnetism. I study phase transitions from AFM-VBS phases in AP states by tuning their amplitudes, and obtain continuously varying critical exponents. In addition, I classify the 1D AP states through entanglement entropy calculations of the central charge in (1+1)D conformal field theory. This new classification could serve as guide for AP states as trial wavefunctions to search for ground states of corresponding quantum spin models.

Subjects/Keywords: Physics; Computational physics; Condensed matter theory; Quantum spin model; Statistical physics

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APA (6^th Edition):

Tang, Y. (2014). Quantum Monte Carlo studies of quantum criticality in low-dimensional spin systems. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/14301

Chicago Manual of Style (16^th Edition):

Tang, Ying. “Quantum Monte Carlo studies of quantum criticality in low-dimensional spin systems.” 2014. Doctoral Dissertation, Boston University. Accessed January 17, 2019. http://hdl.handle.net/2144/14301.

MLA Handbook (7^th Edition):

Tang, Ying. “Quantum Monte Carlo studies of quantum criticality in low-dimensional spin systems.” 2014. Web. 17 Jan 2019.

Vancouver:

Tang Y. Quantum Monte Carlo studies of quantum criticality in low-dimensional spin systems. [Internet] [Doctoral dissertation]. Boston University; 2014. [cited 2019 Jan 17]. Available from: http://hdl.handle.net/2144/14301.

Council of Science Editors:

Tang Y. Quantum Monte Carlo studies of quantum criticality in low-dimensional spin systems. [Doctoral Dissertation]. Boston University; 2014. Available from: http://hdl.handle.net/2144/14301

21. Smith, Katherine Margaret. Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean.

Degree: 2018, University of Colorado at Boulder

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10623667

► In this dissertation, Large Eddy Simulations (LES) are used to model the coupled turbulence-reactive tracer dynamics within the upper mixed layer of the ocean.… (more)

▼ In this dissertation, Large Eddy Simulations (LES) are used to model the coupled turbulence-reactive tracer dynamics within the upper mixed layer of the ocean. Prior work has shown that LES works well over the spatial and time scales relevant to both turbulence and reactive biogeochemistry. Additionally, the code intended for use is able to carry an arbitrary number of tracer equations, allowing for easy expansion of the species reactions. Research in this dissertation includes a study of 15 idealized non-reactive tracers within an evolving large-scale temperature front in order determine and understand the fundamental dynamics underlying turbulence-tracer interaction in the absence of reactions. The focus of this study, in particular, was on understanding the evolution of biogeochemically-relevant, non-reactive tracers in the presence of both large (~5 km) submesoscale eddies and smallscale (~100 m) wave-driven Langmuir turbulence. The 15 tracers studied have different initial, boundary, and source conditions and significant differences are seen in their distributions depending on these conditions. Differences are also seen between regions where submesoscale eddies and small-scale Langmuir turbulence are both present, and in regions with only Langmuir turbulence. A second study focuses on the examination of Langmuir turbulence effects on upper ocean carbonate chemistry. Langmuir mixing time scales are similar to those of chemical reactions, resulting in potentially strong tracer-flow coupling effects. The strength of the Langmuir turbulence is varied, from no wave-driven turbulence (i.e., only shear-driven turbulence), to Langmuir turbulence that is much stronger than that found in typical upper ocean conditions. Three different carbonate chemistry models are also used in this study: time-dependent chemistry, equilibrium chemistry, and no-chemistry (i.e., non-reactive tracers). The third and final study described in this dissertation details the development of a reduced-order biogeochemical model with 17 state equations that can accurately reproduce the Bermuda Atlantic Time-series Study (BATS) ecosystem behavior, but that can also be integrated within high-resolution LES.

Subjects/Keywords: Fluid mechanics; Computational physics; Physical oceanography

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APA (6^th Edition):

Smith, K. M. (2018). Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean. (Thesis). University of Colorado at Boulder. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10623667

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

Chicago Manual of Style (16^th Edition):

Smith, Katherine Margaret. “Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean.” 2018. Thesis, University of Colorado at Boulder. Accessed January 17, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10623667.

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

MLA Handbook (7^th Edition):

Smith, Katherine Margaret. “Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean.” 2018. Web. 17 Jan 2019.

Vancouver:

Smith KM. Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean. [Internet] [Thesis]. University of Colorado at Boulder; 2018. [cited 2019 Jan 17]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10623667.

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

Council of Science Editors:

Smith KM. Effects of Submesoscale Turbulence on Reactive Tracers in the Upper Ocean. [Thesis]. University of Colorado at Boulder; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10623667

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

22. Capobianco, Vincent J. Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis.

Degree: 2017, California State University, Long Beach

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10639011

► Computational fluid dynamic (CFD) simulations were conducted on a known low aspect ratio wing design as well as four variant designs incorporating Coanda effect… (more)

Subjects/Keywords: Fluid mechanics; Computational physics; Aerospace engineering

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APA (6^th Edition):

Capobianco, V. J. (2017). Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis. (Thesis). California State University, Long Beach. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10639011

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):

Capobianco, Vincent J. “Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis.” 2017. Thesis, California State University, Long Beach. Accessed January 17, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10639011.

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

MLA Handbook (7^th Edition):

Capobianco, Vincent J. “Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis.” 2017. Web. 17 Jan 2019.

Vancouver:

Capobianco VJ. Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis. [Internet] [Thesis]. California State University, Long Beach; 2017. [cited 2019 Jan 17]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10639011.

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

Council of Science Editors:

Capobianco VJ. Effect of slot height variation on the aerodynamic performance of a circulation control airfoil| A CFD analysis. [Thesis]. California State University, Long Beach; 2017. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10639011

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

University of Central Lancashire

23. Soltani, Hamidreza. Development and application of real-time and interactive software for complex system.

Degree: PhD, 2016, University of Central Lancashire

URL: http://clok.uclan.ac.uk/20443/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727072

► Soft materials have attracted considerable interest in recent years for predicting the characteristics of phase separation and self-assembly in nanoscale structures. A popular method for… (more)

▼ Soft materials have attracted considerable interest in recent years for predicting the characteristics of phase separation and self-assembly in nanoscale structures. A popular method for demonstrating and simulating the dynamic behaviour of particles (e.g. particle tracking) and to consider effects of simulation parameters is cell dynamic simulation (CDS). This is a cellular computerisation technique that can be used to investigate different aspects of morphological topographies of soft material systems. The acquisition of quantitative data from particles is a critical requirement in order to obtain a better understanding and of characterising their dynamic behaviour. To achieve this objective particle tracking methods considering quantitative data and focusing on different properties and components of particles is essential. Despite the availability of various types of particle tracking used in experimental work, there is no method available to consider uniform computational data. In order to achieve accurate and efficient computational results for cell dynamic simulation method and particle tracking, two factors are essential: computing/calculating time-scale and simulation system size. Consequently, finding available computing algorithms and resources such as sequential algorithm for implementing a complex technique and achieving precise results is critical and rather expensive. Therefore, it is highly desirable to consider a parallel algorithm and programming model to solve time-consuming and massive computational processing issues. Hence, the gaps between the experimental and computational works and solving time consuming for expensive computational calculations need to be filled in order to investigate a uniform computational technique for particle tracking and significant enhancements in speed and execution times. The work presented in this thesis details a new particle tracking method for integrating diblock copolymers in the form of spheres with a shear flow and a novel designed GPU-based parallel acceleration approach to cell dynamic simulation (CDS). In addition, the evaluation of parallel models and architectures (CPUs and GPUs) utilising the mixtures of application program interface, OpenMP and programming model, CUDA were developed. Finally, this study presents the performance enhancements achieved with GPU-CUDA of approximately ~2 times faster than multi-threading implementation and 13~14 times quicker than optimised sequential processing for the CDS computations/workloads respectively.

Subjects/Keywords: Computational physics; Computer science not elsewhere classified

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APA (6^th Edition):

Soltani, H. (2016). Development and application of real-time and interactive software for complex system. (Doctoral Dissertation). University of Central Lancashire. Retrieved from http://clok.uclan.ac.uk/20443/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727072

Chicago Manual of Style (16^th Edition):

Soltani, Hamidreza. “Development and application of real-time and interactive software for complex system.” 2016. Doctoral Dissertation, University of Central Lancashire. Accessed January 17, 2019. http://clok.uclan.ac.uk/20443/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727072.

MLA Handbook (7^th Edition):

Soltani, Hamidreza. “Development and application of real-time and interactive software for complex system.” 2016. Web. 17 Jan 2019.

Vancouver:

Soltani H. Development and application of real-time and interactive software for complex system. [Internet] [Doctoral dissertation]. University of Central Lancashire; 2016. [cited 2019 Jan 17]. Available from: http://clok.uclan.ac.uk/20443/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727072.

Council of Science Editors:

Soltani H. Development and application of real-time and interactive software for complex system. [Doctoral Dissertation]. University of Central Lancashire; 2016. Available from: http://clok.uclan.ac.uk/20443/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727072

24. -9616-6165. Computational modeling of fluctuations and phase behavior in polymeric systems.

Degree: Chemical Engineering, 2015, University of Texas – Austin

URL: http://hdl.handle.net/2152/32359

► This research focuses on the computational modeling of fluctuations, interactions, phase behavior and structural characteristics of multicomponent polymeric systems. The role of fluctuations is studied… (more)

▼ This research focuses on the computational modeling of fluctuations, interactions, phase behavior and structural characteristics of multicomponent polymeric systems. The role of fluctuations is studied in the context of block copolymer melts and polymer blends stabilized using copolymers exhibiting different sequence architectures. The relationship between interparticle interactions and structural characteristics of the aggregates formed in particle-polymer solutions is examined for charged nanoparticle-polymer and charged dendrimer-polyelectrolyte system. A hybrid Monte Carlo and self consistent field theory approach employed in single chain in mean field simulations (SCMF) is utilized in order to achieve the equilibrium morphologies/aggregates in such polymeric systems. We examine the effect of composition fluctuations on the phase behavior of polydisperse block copolymer melts quantified in terms of fluctuation-induced shift in the order-disorder transition temperature from the corresponding mean-field predictions. Fluctuation effects can also play an important role in stabilizing bicontinuous microemulsions phases. To study this effect, we examine polymer blend systems compatibilized by a copolymer having different sequence architectures such as monodisperse and polydisperse block copolymer, and gradient copolymer. We systematically assess the efficiency of such system in forming bicontinuous microemulsions phases. We also study the effect of sequence architecture on the phase behavior of gradient copolymer solutions. We extend above framework to account for electrostatic effects arising from charged polymers and dendrimers. Using such a framework, we characterize the clusters formed due to electrostatic binding between oppositely charged dendrimers and polyelectrolytes. Our results indicate that, the binding is maximum when the charge on dendrimers is balanced by the charge on the polyelectrolytes. We extend the above study to probe the phase behavior of charged nanoparticles suspended in polymer solutions. We examine the influence of polymer concentration, particle volume fraction, and particle charge on the structure and size of clusters. We also examine the influence of multibody effects on the resulting structure of nanoparticle clusters. The charged nanoparticle-polymer solution is seen to exhibit significant multibody effects and the effective two-body interparticle potentials are seen to be a function of nanoparticle density. Advisors/Committee Members: Ganesan, Venkat (advisor), Ellison, Christopher (committee member), Sanchez, Isaac (committee member), Truskett, Thomas (committee member), Henkelman, Graeme (committee member), Johnston, Keith (committee member).

Subjects/Keywords: Fluctuations; Nanoparticle-polymer; Polymer physics; Computational modeling

11 more images…

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APA (6^th Edition):

-9616-6165. (2015). Computational modeling of fluctuations and phase behavior in polymeric systems. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/32359

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

Chicago Manual of Style (16^th Edition):

-9616-6165. “Computational modeling of fluctuations and phase behavior in polymeric systems.” 2015. Thesis, University of Texas – Austin. Accessed January 17, 2019. http://hdl.handle.net/2152/32359.

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

MLA Handbook (7^th Edition):

-9616-6165. “Computational modeling of fluctuations and phase behavior in polymeric systems.” 2015. Web. 17 Jan 2019.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-9616-6165. Computational modeling of fluctuations and phase behavior in polymeric systems. [Internet] [Thesis]. University of Texas – Austin; 2015. [cited 2019 Jan 17]. Available from: http://hdl.handle.net/2152/32359.

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

Council of Science Editors:

-9616-6165. Computational modeling of fluctuations and phase behavior in polymeric systems. [Thesis]. University of Texas – Austin; 2015. Available from: http://hdl.handle.net/2152/32359

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

Northeastern University

25. Zhang, Jingyun. Scanning probe microscopy and computational simulation of polymers and biopolymers.

Degree: PhD, Department of Physics, 2011, Northeastern University

URL: http://hdl.handle.net/2047/d20001024

► In this thesis, polymer and biopolymer structure and dynamics were studied with scanning probe microscopy and computational simulation. In part 1, chapters 1-4, an image… (more)

Subjects/Keywords: physics; molecular physics; theoretical physics; computational simulation; Scanning probe microscopy; Polymers; Biopolymers; Physics

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APA (6^th Edition):

Zhang, J. (2011). Scanning probe microscopy and computational simulation of polymers and biopolymers. (Doctoral Dissertation). Northeastern University. Retrieved from http://hdl.handle.net/2047/d20001024

Chicago Manual of Style (16^th Edition):

Zhang, Jingyun. “Scanning probe microscopy and computational simulation of polymers and biopolymers.” 2011. Doctoral Dissertation, Northeastern University. Accessed January 17, 2019. http://hdl.handle.net/2047/d20001024.

MLA Handbook (7^th Edition):

Zhang, Jingyun. “Scanning probe microscopy and computational simulation of polymers and biopolymers.” 2011. Web. 17 Jan 2019.

Vancouver:

Zhang J. Scanning probe microscopy and computational simulation of polymers and biopolymers. [Internet] [Doctoral dissertation]. Northeastern University; 2011. [cited 2019 Jan 17]. Available from: http://hdl.handle.net/2047/d20001024.

Council of Science Editors:

Zhang J. Scanning probe microscopy and computational simulation of polymers and biopolymers. [Doctoral Dissertation]. Northeastern University; 2011. Available from: http://hdl.handle.net/2047/d20001024

University of North Texas

26. Hedlof, Ryan. Artificially Structured Boundary for Control and Confinement of Beams and Plasmas.

Degree: 2018, University of North Texas

URL: https://digital.library.unt.edu/ark:/67531/metadc1157511/

► An artificially structured boundary (ASB) produces a short-range, static electromagnetic field that can reflect charged particles. In the work presented, an ASB is considered to… (more)

Subjects/Keywords: plasma physics; computational physics; antimatter; Physics, Fluid and Plasma; Physics, Electricity and Magnetism

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APA (6^th Edition):

Hedlof, R. (2018). Artificially Structured Boundary for Control and Confinement of Beams and Plasmas. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc1157511/

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):

Hedlof, Ryan. “Artificially Structured Boundary for Control and Confinement of Beams and Plasmas.” 2018. Thesis, University of North Texas. Accessed January 17, 2019. https://digital.library.unt.edu/ark:/67531/metadc1157511/.

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

MLA Handbook (7^th Edition):

Hedlof, Ryan. “Artificially Structured Boundary for Control and Confinement of Beams and Plasmas.” 2018. Web. 17 Jan 2019.

Vancouver:

Hedlof R. Artificially Structured Boundary for Control and Confinement of Beams and Plasmas. [Internet] [Thesis]. University of North Texas; 2018. [cited 2019 Jan 17]. Available from: https://digital.library.unt.edu/ark:/67531/metadc1157511/.

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

Council of Science Editors:

Hedlof R. Artificially Structured Boundary for Control and Confinement of Beams and Plasmas. [Thesis]. University of North Texas; 2018. Available from: https://digital.library.unt.edu/ark:/67531/metadc1157511/

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

University of Vienna

27. Liebetreu, Maximilian. Conformations and dynamics of polymers of different topologies under shear.

Degree: 2016, University of Vienna

URL: http://othes.univie.ac.at/43039/

►

Ziel der Masterarbeit ist die Bestimmung der Konformationen und dynamischen Moden von Polymeren unterschiedlicher Topologie in einem Scherung ausgesetzten Fluid. Das simulierte Fluid wird auf… (more)

▼

Ziel der Masterarbeit ist die Bestimmung der Konformationen und dynamischen Moden von Polymeren unterschiedlicher Topologie in einem Scherung ausgesetzten Fluid. Das simulierte Fluid wird auf charakteristische Eigenschaften getestet. Das Verhalten linearer, ringförmiger und vor allem 3-1-(Trefoil-)verknoteter Polymere in einem Scherung ausgesetzten Fluid wird analysiert. Die Simulation des Fluids erfolgt unter Berücksichtigung der Hydrodynamik, die Integration der Bewegungsgleichungen des Polymers folgt dem für die Molekulardynamik gebräuchlichen Velocity-Verlet-Algorithmus. Zur Berechnung des Fluids wird der Hybridansatz der Multi-Particle Collision Dynamics (MPCD) aufgesetzt, getestet und angewendet. Die Methode bietet eine effiziente und akkurate Kopplung der Polymerdynamik mit der Hydrodynamik des Lösungsmittels. Das Hauptaugenmerk liegt auf dem Zusammenhang zwischen Knotengröße und Winkel zwischen Knotenmittelpunkt und Hauptorientierungsachse relativ zum Polymerschwerpunkt, sowie auf der Bestimmung charakteristischer Formparameter unter Anwesenheit des Knotens im Vergleich mit Ringpolymeren ohne Knoten, jeweils in Abhängigkeit der Weissenbergzahl. Unsere Ergebnisse suggerieren, dass Knoten auf dem 3-1-verknoteten Ring bei hoher Weissenbergzahl eine Tendenz entwickeln, an einem von beiden Enden des Polymers lokalisiert zu sein, parallel zur Flussrichtung. Die mittlere Zahl Beads, welche Teil des Knotens sind, sinkt mit steigender Scherung. Zusätzlich zeigt sich, dass der 3-1-verknotete Ring im Bezug auf Formparameter schneller auf wachsende Scherung reagiert, als gewöhnliche Ringe mit derselben Anzahl von Beads.

The purpose of this Master's Thesis is the calculation of conformations and dynamic modes of polymers of different topologies embedded in a fluid under shear. The simulated fluid is tested for characteristic values. The behavior of linear, circular and, most importantly, 3-1 (trefoil) knotted polymers embedded in the sheared fluid is analysed. The fluid is simulated in agreement with hydrodynamics, the integration of the polymer's equations of motion obeys the Velocity-Verlet algorithm, which is commonly used for molecular dynamics. For reasons of efficiency, the hybrid approach of Multi-Particle Collision Dynamics (MPCD) is set up, tested and employed to compute the fluid. This method provides an efficient and accurate coupling of the polymer's molecular dynamics to the solvent's hydrodynamics. The focus lies on the correlation between knot size and angle between knot center of mass and first principal axis relative to the polymer's center of mass, as well as computation of characteristic shape parameters in presence of a knot in comparison to cyclic polymers without knots, each in dependency of Weissenberg number. We obtain evidence that for the 3-1-knotted ring at high Weissenberg number, knots develop a tendency to be located at either end of the polymer, aligned with the flow. We also find that the average number of beads on the knot decreases with increasing shear.…

Subjects/Keywords: 33.90 Physik in Beziehung zu anderen Fachgebieten; 33.79 Kondensierte Materie: Sonstiges; 33.69 Flüssigkeiten; Knoten / verknotete Polymere / Scherung / Scherfluss / Computergestützte Physik / Trefoil / Ringpolymer / Ring / Hydrodynamik / MPCD / Makromolekül; Knots / knotted polymers / shear / shear flow / computational physics / trefoil / ring polymer / ring / hydrodynamics / MPCD / macromolecule

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APA (6^th Edition):

Liebetreu, M. (2016). Conformations and dynamics of polymers of different topologies under shear. (Thesis). University of Vienna. Retrieved from http://othes.univie.ac.at/43039/

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):

Liebetreu, Maximilian. “Conformations and dynamics of polymers of different topologies under shear.” 2016. Thesis, University of Vienna. Accessed January 17, 2019. http://othes.univie.ac.at/43039/.

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

MLA Handbook (7^th Edition):

Liebetreu, Maximilian. “Conformations and dynamics of polymers of different topologies under shear.” 2016. Web. 17 Jan 2019.

Vancouver:

Liebetreu M. Conformations and dynamics of polymers of different topologies under shear. [Internet] [Thesis]. University of Vienna; 2016. [cited 2019 Jan 17]. Available from: http://othes.univie.ac.at/43039/.

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

Council of Science Editors:

Liebetreu M. Conformations and dynamics of polymers of different topologies under shear. [Thesis]. University of Vienna; 2016. Available from: http://othes.univie.ac.at/43039/

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

University of Kansas

28. Symons, Teresa Anne. photPARTY: Python Automated Square-Aperture Photometry.

Degree: MS, Physics & Astronomy, 2017, University of Kansas

URL: http://hdl.handle.net/1808/25830

► As CCD’s have drastically increased the amount of information recorded per frame, so too have they increased the time and effort needed to sift through… (more)

Subjects/Keywords: Astronomy; Computer science; Physics; astronomy; computational physics; photometry; python

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APA (6^th Edition):

Symons, T. A. (2017). photPARTY: Python Automated Square-Aperture Photometry. (Masters Thesis). University of Kansas. Retrieved from http://hdl.handle.net/1808/25830

Chicago Manual of Style (16^th Edition):

Symons, Teresa Anne. “photPARTY: Python Automated Square-Aperture Photometry.” 2017. Masters Thesis, University of Kansas. Accessed January 17, 2019. http://hdl.handle.net/1808/25830.

MLA Handbook (7^th Edition):

Symons, Teresa Anne. “photPARTY: Python Automated Square-Aperture Photometry.” 2017. Web. 17 Jan 2019.

Vancouver:

Symons TA. photPARTY: Python Automated Square-Aperture Photometry. [Internet] [Masters thesis]. University of Kansas; 2017. [cited 2019 Jan 17]. Available from: http://hdl.handle.net/1808/25830.

Council of Science Editors:

Symons TA. photPARTY: Python Automated Square-Aperture Photometry. [Masters Thesis]. University of Kansas; 2017. Available from: http://hdl.handle.net/1808/25830

Georgia Tech

29. Rajendar, Ashok. Multifluid Magnetohydrodynamic Investigation of the Global Dynamics of Saturn's Magnetosphere.

Degree: PhD, Earth and Atmospheric Sciences, 2015, Georgia Tech

URL: http://hdl.handle.net/1853/56222

► The dynamics of Saturn's magnetosphere are driven internally by the planet's strong magnetic field, rapid rotation rate, and inner-magnetosphere plasma source, and externally by the… (more)

▼ The dynamics of Saturn's magnetosphere are driven internally by the planet's strong magnetic field, rapid rotation rate, and inner-magnetosphere plasma source, and externally by the solar wind. We use a multifluid magnetohydrodynamic simulation of Saturn's magnetosphere to investigate the production and transport of new plasma, the dynamics of Saturn's magnetotail, and response to seasonal variation. Saturn's closely aligned magnetic dipole and rotational axes are inclined 26.7° relative to the plane of its orbit. As a result, the magnetospheric morphology is strongly influenced by the solar wind; the plasma sheet is deformed into a "basin" at solstice, with decreasing curvature as the planet approaches equinox. Internally, new water group plasma is produced by ionization of Saturn's distributed neutral cloud, while charge-exchange collisions between magnetospheric ions and neutrals result in a loss of momentum from the plasma. New plasma is accelerated towards corotation by the magnetic field, while centrifugal stresses cause it to move radially outward. In order to prevent runaway inflation of the magnetosphere, this plasma must eventually escape, either through the flanks or down the magnetotail. The Saturn multifluid model features three ion species (protons, water group ions, and a heavy tracer), allowing us to track the dynamics of each ion species, as well as the evolution of the electron pressure. We have modified the simulation to include neutral cloud interactions, specifically photoionization, electron impact ionization, and symmetric charge exchange, enabling simulation of mass-loading as a function of local plasma variables. Our 3D multifluid global simulation provides global context for in-situ observations, which, while valuable, only provide data from a single spatial location at a given time. We use this model to study the production and outflow of plasma in the inner magnetosphere, as well as the characteristics of inward-moving outer-magnetosphere injection fingers. We also investigate the impact of seasonal changes on the global magnetospheric configuration and dynamics, as well as the plasma production and transport processes in the inner and middle magnetosphere. Finally, we investigate the evolution of plasmoids and their possible role in removing inner magnetosphere plasma. We validate our results using data from the Cassini Plasma Spectrometer and Magnetometer instruments (CAPS and MAG). Advisors/Committee Members: Paty, Carol S. (advisor), Dufek, Josef D. (committee member), Simon, Sven (committee member), Walker, Mitchell L. R. (committee member), Wray, James J. (committee member).

Subjects/Keywords: Saturn; magnetosphere; plasma physics; planetary science; computational plasma physics; numerical modeling

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APA (6^th Edition):

Rajendar, A. (2015). Multifluid Magnetohydrodynamic Investigation of the Global Dynamics of Saturn's Magnetosphere. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/56222

Chicago Manual of Style (16^th Edition):

Rajendar, Ashok. “Multifluid Magnetohydrodynamic Investigation of the Global Dynamics of Saturn's Magnetosphere.” 2015. Doctoral Dissertation, Georgia Tech. Accessed January 17, 2019. http://hdl.handle.net/1853/56222.

MLA Handbook (7^th Edition):

Rajendar, Ashok. “Multifluid Magnetohydrodynamic Investigation of the Global Dynamics of Saturn's Magnetosphere.” 2015. Web. 17 Jan 2019.

Vancouver:

Rajendar A. Multifluid Magnetohydrodynamic Investigation of the Global Dynamics of Saturn's Magnetosphere. [Internet] [Doctoral dissertation]. Georgia Tech; 2015. [cited 2019 Jan 17]. Available from: http://hdl.handle.net/1853/56222.

Council of Science Editors:

Rajendar A. Multifluid Magnetohydrodynamic Investigation of the Global Dynamics of Saturn's Magnetosphere. [Doctoral Dissertation]. Georgia Tech; 2015. Available from: http://hdl.handle.net/1853/56222

ETH Zürich

30. Gresch, Dominik. Identifying Topological Semimetals.

Degree: 2018, ETH Zürich

URL: http://hdl.handle.net/20.500.11850/308602

► Geometric properties of electron states in crystalline solids lead to a topological classification of materials. A remarkable consequence of this topological viewpoint is that it… (more)

▼ Geometric properties of electron states in crystalline solids lead to a topological classification of materials. A remarkable consequence of this topological viewpoint is that it reveals a deep link between the bulk properties of a material and electronic states which form on its surface. This leads to unique transport properties, the most well-known example being the integer quantum Hall effect. In topological semimetals, the bulk features of interest are nodes in the band structure, where occupied and unoccupied states are not separated by an energy gap. This leads to interesting low-energy excitations, some of which are the condensed matter equivalent of fundamental particles. The Weyl Fermion for example is realized in topological semimetals, which is theoretically postulated but eludes experimental verification in high-energy physics. Crystals however do not have a continuous translational symmetry, and thus do not need to fulfill the so-called Lorentz invariance present in high-energy physics. This allows for Fermions to exist in materials which do not have a fundamental counterpart. The main topic of this thesis is the study and identification of topological semimetals. We propose a mechanism for Weyl Fermions to form under the influence of an external magnetic field. This effect could help explain the anisotropic negative magnetoresistance in transition metal dipnictides. We also study several novel topological material candidates, hosting a plethora of Weyl Fermions and topological nodal lines. In addition to studying specific material examples, we also present several tools and algorithms which enhance the process of identifying topological materials. First, we present an algorithm for evaluating the phase diagram of a system with discrete phases. This is useful in identifying topological phases, but also applicable to other fields of computational physics. Furthermore, we develop tools that simplify the creation of k·p and tight-binding models to study crystalline systems. A particular focus lies on the construction of models which preserve the crystal symmetries, since these play a crucial role in determining the topology of a material. And finally, we develop an algorithm that reliably finds and classifies topological nodal features. Advisors/Committee Members: Troyer, Matthias, Neupert, Titus, Soluyanov, Alexey A..

Subjects/Keywords: Condensed matter physics; Topological materials; Computational physics; Algorithms; Band structure; Semimetals

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APA (6^th Edition):

Gresch, D. (2018). Identifying Topological Semimetals. (Doctoral Dissertation). ETH Zürich. Retrieved from http://hdl.handle.net/20.500.11850/308602

Chicago Manual of Style (16^th Edition):

Gresch, Dominik. “Identifying Topological Semimetals.” 2018. Doctoral Dissertation, ETH Zürich. Accessed January 17, 2019. http://hdl.handle.net/20.500.11850/308602.

MLA Handbook (7^th Edition):

Gresch, Dominik. “Identifying Topological Semimetals.” 2018. Web. 17 Jan 2019.

Vancouver:

Gresch D. Identifying Topological Semimetals. [Internet] [Doctoral dissertation]. ETH Zürich; 2018. [cited 2019 Jan 17]. Available from: http://hdl.handle.net/20.500.11850/308602.

Council of Science Editors:

Gresch D. Identifying Topological Semimetals. [Doctoral Dissertation]. ETH Zürich; 2018. Available from: http://hdl.handle.net/20.500.11850/308602

Open Access Theses and Dissertations