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Université de Neuchâtel
1.
Badin, Alice.
Application of carbon-chlorine isotopic analysis to
determine the origin and fate of chlorinated ethenes in
groundwater.
Degree: 2015, Université de Neuchâtel
URL: http://doc.rero.ch/record/322777 
► Chlorinated ethenes are ubiquitous groundwater contaminants posing a threat to one of our main drinking water sources. Despite their spill history dating back to more…
(more)
▼ Chlorinated ethenes are ubiquitous groundwater
contaminants posing a threat to one of our main drinking water
sources. Despite their spill history dating back to more than 40
years ago, these contaminants are still found in groundwater in
numerous industrially developed countries due to their persistence,
difficult characterisation in the subsurface and resulting
challenging remediation. When adequate redox conditions, microbial
communities and/or minerals are present, these compounds are known
to undergo natural degradation. Applying natural attenuation as a
management strategy is thus being increasingly considered as it
constitutes a cost-effective environmental friendly approach. Tools
enabling to differentiate degradation pathways, predict the fate of
contaminants as well as understand the mechanisms underlying their
degradation thus constitute the key to a better management of
chlorinated ethenes contaminated sites. Methods allowing for
contaminant source tracking are also of interest in a legal context
where the contamination precursor is searched for. Among the
various tools applied to address such questions, compound specific
isotopic analysis (CSIA) – which consists in measuring the ratio
between light and heavy stable isotopes of one element (i.e.
isotopic composition) of a compound – is being increasingly
applied. This thesis was aimed at exploring the benefits
and limits of applying CSIA to substantiate the origin and fate of
chlorinated ethenes in groundwater. For this purpose, a first field
study aimed at investigating the performance of dual
Carbon-Chlorine (C-Cl) isotopic analysis for contaminant source
discrimination was carried out. Laboratory experiments were then
performed in view of getting more insight in the reaction
mechanisms underlying tetrachloroethylene (PCE) reductive
dechlorination and to explore the potential of dual C-Cl isotopic
analysis to differentiate degradation pathways. A mathematical
model was further developed to comprehensively simulate chlorinated
ethenes C and Cl isotopic evolution during sequential
dechlorination.
Simulations were compared to experimental data in
order to evaluate this model in its ability to reproduce and thus
predict real data. Finally, the contribution of C and Cl isotopic
analysis to identify changes in redox processes further affecting
chlorinated ethenes in groundwater was challenged when assessing
the effect of source thermal remediation by steam injection on a
chlorinated ethenes plume. For regulatory reasons,
determining the contamination perpetrator is often of interest. As
the isotopic signature of solvents produced from different
manufacturers showed a large variability, CSIA was suggested as a
method to discriminate the origin of contamination between
different suspected sources by comparing their isotopic signatures.
Such application however relies on the assumption that isotopic
signatures will also differ in the field. Our first goal was thus
to determine the source isotopic variability of PCE at a country
scale. For this purpose,…
Advisors/Committee Members: Daniel (Dir.), Mario (Codir.).
Subjects/Keywords: simulations
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APA (6th Edition):
Badin, A. (2015). Application of carbon-chlorine isotopic analysis to
determine the origin and fate of chlorinated ethenes in
groundwater. (Thesis). Université de Neuchâtel. Retrieved from http://doc.rero.ch/record/322777
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Badin, Alice. “Application of carbon-chlorine isotopic analysis to
determine the origin and fate of chlorinated ethenes in
groundwater.” 2015. Thesis, Université de Neuchâtel. Accessed March 01, 2021.
http://doc.rero.ch/record/322777.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Badin, Alice. “Application of carbon-chlorine isotopic analysis to
determine the origin and fate of chlorinated ethenes in
groundwater.” 2015. Web. 01 Mar 2021.
Vancouver:
Badin A. Application of carbon-chlorine isotopic analysis to
determine the origin and fate of chlorinated ethenes in
groundwater. [Internet] [Thesis]. Université de Neuchâtel; 2015. [cited 2021 Mar 01].
Available from: http://doc.rero.ch/record/322777.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Badin A. Application of carbon-chlorine isotopic analysis to
determine the origin and fate of chlorinated ethenes in
groundwater. [Thesis]. Université de Neuchâtel; 2015. Available from: http://doc.rero.ch/record/322777
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
McGill University
2.
Boukerche, Azzedine.
Parallel Simulation with Clustered Processes: Principles and Practice.
Degree: PhD, School of Computer Science, 1995, McGill University
URL: https://escholarship.mcgill.ca/downloads/m039k7490.pdf
;
https://escholarship.mcgill.ca/concern/theses/br86b573s
► La simulation par ordinateur est largement utilisée dans l'analyse des systèmes tels que les grands réseaux d'ordinateurs, la conception assistée par ordinateur (CAO), la manufacture…
(more)
▼ La simulation par ordinateur est largement utilisée dans l'analyse des systèmes tels que les grands réseaux d'ordinateurs, la conception assistée par ordinateur (CAO), la manufacture des semi- conducteurs, et de nombreuses applications militaires et aéro-spatiales. Les ressources de calcul et fou en temps réel exigées pour de telles simulations pourraient inhiber l'utilisation de la simulation dans ces domaines. La simulation parallèle offre une solution prometteuse à ce problème, en créant toutefois un nouvel ensemble de problèmes et de compromis. […]
Simulations are widely used in analyzing systems such as large communication networks, computer-aided design (CAD) circuits, semiconductor manufacturing line, and many aerospace and military applications. The computational expense and/or the real time required to run significant simulation may inhibit the use of simulation in these areas. Parallel simulation offers a promising solution to this problem, but not without creating a new set of issues and trade-offs. […]
Advisors/Committee Members: Tropper, Carl (Supervisor).
Subjects/Keywords: Simulations
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APA (6th Edition):
Boukerche, A. (1995). Parallel Simulation with Clustered Processes: Principles and Practice. (Doctoral Dissertation). McGill University. Retrieved from https://escholarship.mcgill.ca/downloads/m039k7490.pdf ; https://escholarship.mcgill.ca/concern/theses/br86b573s
Chicago Manual of Style (16th Edition):
Boukerche, Azzedine. “Parallel Simulation with Clustered Processes: Principles and Practice.” 1995. Doctoral Dissertation, McGill University. Accessed March 01, 2021.
https://escholarship.mcgill.ca/downloads/m039k7490.pdf ; https://escholarship.mcgill.ca/concern/theses/br86b573s.
MLA Handbook (7th Edition):
Boukerche, Azzedine. “Parallel Simulation with Clustered Processes: Principles and Practice.” 1995. Web. 01 Mar 2021.
Vancouver:
Boukerche A. Parallel Simulation with Clustered Processes: Principles and Practice. [Internet] [Doctoral dissertation]. McGill University; 1995. [cited 2021 Mar 01].
Available from: https://escholarship.mcgill.ca/downloads/m039k7490.pdf ; https://escholarship.mcgill.ca/concern/theses/br86b573s.
Council of Science Editors:
Boukerche A. Parallel Simulation with Clustered Processes: Principles and Practice. [Doctoral Dissertation]. McGill University; 1995. Available from: https://escholarship.mcgill.ca/downloads/m039k7490.pdf ; https://escholarship.mcgill.ca/concern/theses/br86b573s
Cornell University
3.
Gupta, Ankush.
Anisotropic Etching Of Si(100) In Aqueous Solutions.
Degree: PhD, Chemistry and Chemical Biology, 2011, Cornell University
URL: http://hdl.handle.net/1813/29199
► The microelectronics industry has long sought an aqueous etchant that could produce atomically flat Si(100) surfaces by anisotropic etching. This dissertation shows that near-atomically-flat Si(100)…
(more)
▼ The microelectronics industry has long sought an aqueous etchant that could produce atomically flat Si(100) surfaces by anisotropic etching. This dissertation shows that near-atomically-flat Si(100) surfaces can be produced by an aqueous silicon etchant - 40% NH4F (aq.). The etching of Si(100) in 40% NH4F (aq.) produced H2 bubbles as a reaction product, which led to significant roughening of the surface if not removed. A near-atomically flat surface was produced if the bubbles were periodically removed from the etching surface. Analysis of the infrared spectrum of the NH4F-etched surface showed that the surface was H-terminated. A new spectral deconvolution technique led to reinterpretation of the spectral bands and revealed the surface structure that is consistent with the STM images of the surface. Investigations of the bubble-induced roughening of Si(100) surface during NH4F etching revealed a new mechanism of {111} microfacet formation on this surface. To understand the etch kinetics that produced the observed morphologies, a fully atomistic kinetic Monte Carlo simulation of Si(100) etching was developed. The
simulations showed that previously postulated models of H/Si(100) etching based solely on bond counting or interadsorbate stress cannot explain the experimental etch morphologies. The
simulations suggested mechanisms that lead to the formation of flat stripes, hillocks, and rough morphologies observed on etched Si(100) surfaces. The production of long rows observed on the NH4F-etched Si(100) surface could only be explained by the fast etching of dihydrides bonded to monohydrides - termed as "[alpha]-dihydrides". In addition, a comprehensive study of the vibrational spectrum of various Hterminated Si surfaces produced by NH4F (aq.) etching was performed using density functional theory. The
simulations predicted stretch mode energies within 2% of the experimentally observed; however, the accuracy of the calculations was strongly affected by interadsorbate strain. Simulation of point defects on H/Si(100) surfaces provided insights into the origin of large heterogeneous broadening observed on NH4F-etched Si(100) surfaces.
Advisors/Committee Members: Hines, Melissa A (chair), Park, Jiwoong (committee member), Loring, Roger F (committee member).
Subjects/Keywords: ammonium flouride etching; DFT simulations; KMC simulations
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APA (6th Edition):
Gupta, A. (2011). Anisotropic Etching Of Si(100) In Aqueous Solutions. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/29199
Chicago Manual of Style (16th Edition):
Gupta, Ankush. “Anisotropic Etching Of Si(100) In Aqueous Solutions.” 2011. Doctoral Dissertation, Cornell University. Accessed March 01, 2021.
http://hdl.handle.net/1813/29199.
MLA Handbook (7th Edition):
Gupta, Ankush. “Anisotropic Etching Of Si(100) In Aqueous Solutions.” 2011. Web. 01 Mar 2021.
Vancouver:
Gupta A. Anisotropic Etching Of Si(100) In Aqueous Solutions. [Internet] [Doctoral dissertation]. Cornell University; 2011. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1813/29199.
Council of Science Editors:
Gupta A. Anisotropic Etching Of Si(100) In Aqueous Solutions. [Doctoral Dissertation]. Cornell University; 2011. Available from: http://hdl.handle.net/1813/29199
4.
Arzoumanian, Emmanuel.
Développement du projet SETUP (Simulations Expérimentale et Théorique Utiles à la planétologie) : application à l'étude de la physico-chimie de l'atmosphère de Titan : Developpement of the SETUP project (experimental and theoretical simulations useful for planetology) : studies applied to the physical chemistry of Titan's atmosphere.
Degree: Docteur es, Astronomie, astrophysique, 2010, Université Paris-Est
URL: http://www.theses.fr/2010PEST1046
► Le travail de cette thèse s’inscrit dans le cadre du développement du programme S.E.T.U.P. (Simulations Expérimentale et Théorique Utiles à la planétologie) dont l’objectif est…
(more)
▼ Le travail de cette thèse s’inscrit dans le cadre du développement du programme S.E.T.U.P. (
Simulations Expérimentale et Théorique Utiles à la planétologie) dont l’objectif est d’effectuer des
simulations représentatives de l’atmosphère de Titan et de déterminer les processus physico-chimiques qui y sont impliqués. Pour ce faire, un dispositif expérimental combine deux types de dépôts d’énergie (électrons et photons) représentatifs des processus de dissociation des molécules N2 et CH4 qui composent majoritairement l’atmosphère de Titan. De plus, une technique d’analyse par spectroscopie laser doit permettre d’identifier et de quantifier des produits et donc de suivre l’évolution du mélange réactionnel in situ en temps réel.La méthodologie adoptée pour la mise en œuvre des expériences de
simulations a été de caractériser l’ensemble des étapes depuis les sources énergétiques jusqu’à l’analyse des produits et de développer les outils de modélisation nécessaires à l’interprétation des expériences.Dans un premier temps, il s’est agit de mieux caractériser les deux types de photolyse du méthane envisagés. En effet, il est prévu d’utiliser soit une lampe UV délivrant un rayonnement à Lyman-α (121,6 nm) soit un laser excimère KrF pulsé délivrant un rayonnement à 248 nm. Ce dernier doit en effet permettre des études cinétiques concernant les espèces à courte durée de vie. Des expériences d’irradiation de CH4 et d’un mélange N2/CH4 aux deux longueurs d’onde ont été menées puis simulées grâce à un modèle 0D.L’analyse fine des résultats issus des irradiations de CH4 à Lyman-α montre que des travaux complémentaires sont nécessaires pour comprendre les différences entre les expériences et le modèle chimique. En particulier, une caractérisation de l’émission de la lampe s’est avérée indispensable et a été réalisée afin d’améliorer la compréhension de la chimie mise en jeu. Les résultats obtenus lors de l’irradiation à 248 nm suggèrent que la source laser utilisée pourrait provoquer l’ionisation de CH4 et induire une chimie ionique qui n’était pas envisagée au départ. Ce type d’irradiation pourrait se révéler intéressant pour étudier les processus ionosphériques de l’atmosphère de Titan. En revanche, cette source doit être abandonnée pour l’étude de la chimie des neutres. Une source pulsée à Lyman-α devra être développée.Dans un deuxième temps, trois types d’expériences préliminaires de
simulations de l’atmosphère de Titan ont été effectuées. Afin de mieux comprendre l’importance relative de chaque source énergétique, des expériences dites de « plasma » où N2 et CH4 sont dissociés simultanément dans un plasma crée par décharge microonde, ont tout d’abord été menées. Ensuite, des expériences dites de « post-décharge » où CH4 est introduit dans l’enceinte après la dissociation de N2 par plasma, ont été conduites. Et enfin, des expériences dites de « couplage », censées mieux représenter les processus de l’atmosphère de Titan où CH4, toujours introduit en post-décharge, est cette fois photodissocié à Lyman-α, ont été réalisées.Lors des…
Advisors/Committee Members: Gazeau, Marie-Claire (thesis director).
Subjects/Keywords: Titan; Atmosphere; Simulations; Titan; Atmosphere; Simulations
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APA (6th Edition):
Arzoumanian, E. (2010). Développement du projet SETUP (Simulations Expérimentale et Théorique Utiles à la planétologie) : application à l'étude de la physico-chimie de l'atmosphère de Titan : Developpement of the SETUP project (experimental and theoretical simulations useful for planetology) : studies applied to the physical chemistry of Titan's atmosphere. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2010PEST1046
Chicago Manual of Style (16th Edition):
Arzoumanian, Emmanuel. “Développement du projet SETUP (Simulations Expérimentale et Théorique Utiles à la planétologie) : application à l'étude de la physico-chimie de l'atmosphère de Titan : Developpement of the SETUP project (experimental and theoretical simulations useful for planetology) : studies applied to the physical chemistry of Titan's atmosphere.” 2010. Doctoral Dissertation, Université Paris-Est. Accessed March 01, 2021.
http://www.theses.fr/2010PEST1046.
MLA Handbook (7th Edition):
Arzoumanian, Emmanuel. “Développement du projet SETUP (Simulations Expérimentale et Théorique Utiles à la planétologie) : application à l'étude de la physico-chimie de l'atmosphère de Titan : Developpement of the SETUP project (experimental and theoretical simulations useful for planetology) : studies applied to the physical chemistry of Titan's atmosphere.” 2010. Web. 01 Mar 2021.
Vancouver:
Arzoumanian E. Développement du projet SETUP (Simulations Expérimentale et Théorique Utiles à la planétologie) : application à l'étude de la physico-chimie de l'atmosphère de Titan : Developpement of the SETUP project (experimental and theoretical simulations useful for planetology) : studies applied to the physical chemistry of Titan's atmosphere. [Internet] [Doctoral dissertation]. Université Paris-Est; 2010. [cited 2021 Mar 01].
Available from: http://www.theses.fr/2010PEST1046.
Council of Science Editors:
Arzoumanian E. Développement du projet SETUP (Simulations Expérimentale et Théorique Utiles à la planétologie) : application à l'étude de la physico-chimie de l'atmosphère de Titan : Developpement of the SETUP project (experimental and theoretical simulations useful for planetology) : studies applied to the physical chemistry of Titan's atmosphere. [Doctoral Dissertation]. Université Paris-Est; 2010. Available from: http://www.theses.fr/2010PEST1046
5.
Madipally, Sunil veer Kumar.
Simulation of Sawmill Yard Operations Using Software Agents.
Degree: Computer Engineering, 2011, Dalarna University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:du-6026
► Bergkvist insjön AB is a sawmill yard which is capable of producing 350,000 cubic meter of timber every year this requires lot of internal…
(more)
▼ Bergkvist insjön AB is a sawmill yard which is capable of producing 350,000 cubic meter of timber every year this requires lot of internal resources. Sawmill operations can be classified as unloading, sorting, storage and production of timber. In the company we have trucks arriving at random they have to be unloaded and sent back at the earliest to avoid queuing up of trucks creating a problem for truck owners. The sawmill yard has to operate with two log stackers that does several tasks including transporting the logs from trucks to measurement station where the logs will be sorted into classes and dropped into pockets from pockets to the sorted timber yard where they are stored and finally from there to sawmill for final processing.
The main issue that needs to be answered here is the lining up trucks that are waiting to be unload, creating a problem for both sawmill as well as the truck owners and given huge production volume, it is certain that handling of resources is top priority. A key challenge in handling of resources would be unloading of trucks and finding a way to optimize internal resources.
To address this problem i have experimented on different ways of using internal resources, i have designed different cases, in case 1 we have both the log stackers working on sawmill and measurement station. The main objective of having this case is to make sawmill and measurement station to work all the time. Then in case 2, i have divided the work between both the log stackers, one log stacker will be working on sawmill and pocket_control and second log stacker will be working on measurement station and truck. Then in case 3 we have only one log stacker working on all the agents, this case was designed to reduce cost of production, as the experiment cannot be done in real-time due to operational cost, for this purpose simulation is used, preliminary investigation into simulation results suggested that case 2 is the best option has it reduced waiting time of trucks considerably when compared with other cases and it showed 50% increase in optimizing internal resources.
Subjects/Keywords: JADE; Simulations; Discrete-event simulations; JDBC; Database.
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APA (6th Edition):
Madipally, S. v. K. (2011). Simulation of Sawmill Yard Operations Using Software Agents. (Thesis). Dalarna University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:du-6026
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Madipally, Sunil veer Kumar. “Simulation of Sawmill Yard Operations Using Software Agents.” 2011. Thesis, Dalarna University. Accessed March 01, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:du-6026.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Madipally, Sunil veer Kumar. “Simulation of Sawmill Yard Operations Using Software Agents.” 2011. Web. 01 Mar 2021.
Vancouver:
Madipally SvK. Simulation of Sawmill Yard Operations Using Software Agents. [Internet] [Thesis]. Dalarna University; 2011. [cited 2021 Mar 01].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:du-6026.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Madipally SvK. Simulation of Sawmill Yard Operations Using Software Agents. [Thesis]. Dalarna University; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:du-6026
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Wake Forest University
6.
Howard, Jason D.
FIRST-PRINCIPLES SIMULATIONS OF SOLID STATE BATTERY MATERIALS.
Degree: 2018, Wake Forest University
URL: http://hdl.handle.net/10339/90730
► In this work materials with possible applications in all solid state Li-ion batteries are explored using computational methods within the framework of density functional theory…
(more)
▼ In this work materials with possible applications in all solid state Li-ion batteries are explored using computational methods within the framework of density functional theory and kinetic Monte Carlo. The density functional theory simulations use fundamental quantum mechanics along with some approximations to produce accurate models of real materials. A smaller portion of the work uses kinetic Monte Carlo to provide qualitative information about the convergence properties of transport coefficients. The materials Li(2+x)SnO3 and Li(2+x)SnS3 are studied in the context of electrodes for Li-ion batteries. Their structures are calculated, conduction pathways for the Li-ions predicted, open cell voltages calculated, and reactivity with lithium at the surface studied. The results for these materials provided insight into existing experimental data from the literature and made predictions for open cell voltages that had not yet been measured. The materials Li4SnS4, Li2OHCl, and Li2OHBr are studied in the context of solid state electrolytes for Li-ion batteries. The structural properties are explored for some materials by calculating Helmholtz free energies to help understand temperature dependent phases. First principles molecular dynamics are performed on some of these materials to gain insight into the mechanisms for Li-ion diffusion, which is related to the Li-ion conductivity. The molecular dynamics simulations of these materials are also used to calculate order parameters, such as time averaged site occupancies, which provide insight into temperature dependent aspects of their structure. The computations using kinetic Monte Carlo are limited to the study of the convergence properties of transport coefficients on a lattice equivalent to the Li lattice of Li2OHCl. These Monte Carlo simulations provide critical insight on the level of statistics needed to converge the transport coefficients related to ionic conductivity. As a whole the simulations in this research provide atomistic level knowledge of real world energy storage materials.
Subjects/Keywords: first principles simulations
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APA (6th Edition):
Howard, J. D. (2018). FIRST-PRINCIPLES SIMULATIONS OF SOLID STATE BATTERY MATERIALS. (Thesis). Wake Forest University. Retrieved from http://hdl.handle.net/10339/90730
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Howard, Jason D. “FIRST-PRINCIPLES SIMULATIONS OF SOLID STATE BATTERY MATERIALS.” 2018. Thesis, Wake Forest University. Accessed March 01, 2021.
http://hdl.handle.net/10339/90730.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Howard, Jason D. “FIRST-PRINCIPLES SIMULATIONS OF SOLID STATE BATTERY MATERIALS.” 2018. Web. 01 Mar 2021.
Vancouver:
Howard JD. FIRST-PRINCIPLES SIMULATIONS OF SOLID STATE BATTERY MATERIALS. [Internet] [Thesis]. Wake Forest University; 2018. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10339/90730.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Howard JD. FIRST-PRINCIPLES SIMULATIONS OF SOLID STATE BATTERY MATERIALS. [Thesis]. Wake Forest University; 2018. Available from: http://hdl.handle.net/10339/90730
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Adelaide
7.
Nguyen, Thi Kim Phuong.
Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs.
Degree: 2011, University of Adelaide
URL: http://hdl.handle.net/2440/70889
► This thesis is dedicated to the development of new technologies for sweep improvement due to plugging of highly permeable channels and layers by injected or…
(more)
▼ This thesis is dedicated to the development of new technologies for sweep improvement due to plugging of highly permeable channels and layers by injected or lifted or mobilized fines particles. The following methods of improved waterflood have been proposed in the thesis:
• Injection of raw or poorly treated water with consequent homogenization of the injectivity profile due to distributed along the well skin factor.
• Injection of low salinity or fresh water resulting in lifting of reservoir fines, their migration and further capture by the rock with permeability reduction and redirection of the injected water into unswept area.
• Injection of sweet water into watered-up abandoned wells during pressure blowdown in oil and gas reservoirs with strong water support.
In the above three cases, the proposal of the new technologies was backed by detailed reservoir
simulations. In all cases, the application of the proposed improved oil recovery technology, as forecasted by reservoir simulation, leads to 3-15% of incremental recovery and 2-3 times decrease of the amount of produced and injected water. The technology of raw water injection was developed using Eclipse waterflood BlackOil simulator with modelling of injectivity decline along the well due to plugging of porous media by injected particles. A new numerical procedure describing skin growth with time in each section of long horizontal wells have been developed and implemented into BlackOil Eclipse model. Different configurations of horizontal injectors and producers have been modelled resulting in production forecast with raw waterflooding.
The technology of low salinity water injection have been developed using Eclipse reservoir modelling with polymer injection option, which can describe mobilization of fines particles, their migration, capture and subsequent permeability decline. The main physics mechanism of incremental oil recovery found is the diversion of the injected water into unswept zones due to plugging the swept zone by capture particles. The incremental recovery, as obtained by reservoir simulation, is 12%. It may also result in 2 to 3 times decrease in water injection and production. The proposal of a new technology of small bank of fresh water injection into watered-up and abandoned production wells result in lifting of reservoir fines,
their migration and plugging the path for invaded aquifer water. It results in decrease of water production and prolongation of oil or gas production from wells.
Advisors/Committee Members: Bedrikovetski, Pavel (advisor), Haghighi, Manouchehr (advisor), Australian School of Petroleum (school).
Subjects/Keywords: simulations; formation damage
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Manager
APA (6th Edition):
Nguyen, T. K. P. (2011). Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/70889
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nguyen, Thi Kim Phuong. “Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs.” 2011. Thesis, University of Adelaide. Accessed March 01, 2021.
http://hdl.handle.net/2440/70889.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nguyen, Thi Kim Phuong. “Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs.” 2011. Web. 01 Mar 2021.
Vancouver:
Nguyen TKP. Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs. [Internet] [Thesis]. University of Adelaide; 2011. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/2440/70889.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nguyen TKP. Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs. [Thesis]. University of Adelaide; 2011. Available from: http://hdl.handle.net/2440/70889
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Houston
8.
Agrawal, Himani.
Atomistic and Continuum Reinvestigation of Protein Membrane Interactions.
Degree: PhD, Mechanical Engineering, 2017, University of Houston
URL: http://hdl.handle.net/10657/4784
► The phenomenological theory of elasticity, which encompasses the classical Helfrich- Canham model of a lipid membrane, is used to calculate the deformation energy of a…
(more)
▼ The phenomenological theory of elasticity, which encompasses the classical Helfrich- Canham model of a lipid membrane, is used to calculate the deformation energy of a membrane in the presence of inclusions such as proteins. However, the effective proper- ties calculated using this model does not incorporate the specificity of protein and membrane. In this dissertation, we argue that each protein has a unique mechanical signature based on its interaction with the surrounding lipid bilayer membrane and cannot be treated as a non- specific rigid object. We modify the classical Helfrich-Canham theory of curvature elasticity to incorporate protein-membrane specificity. Experimental observations perplexingly appear to show that rigid proteins may either soften or harden membranes even though conventional wisdom only suggests stiffening. Based on the hypothesis of our modified Helfrich-Canham model, we have carried out atomistic
simulations to investigate peptide-membrane interactions. Together with a continuum model, we reconcile contrast- ing experimental data in the literature including the case of HIV-fusion peptide induced softening. We conclude that the structural rearrangements of the lipids around the inclusions cause the softening or stiffening of the biological membranes. We also discuss the estimation of the new model parameters via atomistic
simulations. Furthermore, we use our modified Helfrich-Canham model to reinvestigate the membrane curvature mediated long ranged force between two transmembrane proteins. The classical linearized Helfrich- Canham Hamiltonian based derivations reveal the nature of the force between a pair of proteins to be repulsive in the zero-temperature limit and the interaction potential is inversely proportional to the fourth power of the distance separating the inclusions. A key observation regarding this widely-quoted result is that any two (mechanically rigid) proteins will experience an identical force; this is because the protein membrane specificity is not taken into account in the existing models. We find that the incorporation of protein- specificity can reduce the interaction force by several orders of magnitude. Our result may provide at least one plausible reason behind why in some computational and experimental studies, a net attractive force between proteins is in evidence.
Advisors/Committee Members: Sharma, Pradeep (advisor), Kulkarni, Yashashree (committee member), Chen, Yi-Chao (committee member), Gunaratne, Gemunu H. (committee member), Liu, Dong (committee member).
Subjects/Keywords: Membrane proteins; Simulations
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APA (6th Edition):
Agrawal, H. (2017). Atomistic and Continuum Reinvestigation of Protein Membrane Interactions. (Doctoral Dissertation). University of Houston. Retrieved from http://hdl.handle.net/10657/4784
Chicago Manual of Style (16th Edition):
Agrawal, Himani. “Atomistic and Continuum Reinvestigation of Protein Membrane Interactions.” 2017. Doctoral Dissertation, University of Houston. Accessed March 01, 2021.
http://hdl.handle.net/10657/4784.
MLA Handbook (7th Edition):
Agrawal, Himani. “Atomistic and Continuum Reinvestigation of Protein Membrane Interactions.” 2017. Web. 01 Mar 2021.
Vancouver:
Agrawal H. Atomistic and Continuum Reinvestigation of Protein Membrane Interactions. [Internet] [Doctoral dissertation]. University of Houston; 2017. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10657/4784.
Council of Science Editors:
Agrawal H. Atomistic and Continuum Reinvestigation of Protein Membrane Interactions. [Doctoral Dissertation]. University of Houston; 2017. Available from: http://hdl.handle.net/10657/4784
University of Florida
9.
Friess, Claudia.
Assessing and Managing a Fishery under Moratorium The Case of the Recovering Goliath Grouper (Epinephelus itajara) in Florida.
Degree: PhD, Fisheries and Aquatic Sciences - Forest Resources and Conservation, 2018, University of Florida
URL: https://ufdc.ufl.edu/UFE0053975
► When fisheries are put under moratorium, fisheries-dependent data-the main source of information for assessment and management-are no longer available, creating a conundrum for future management.…
(more)
▼ When fisheries are put under moratorium, fisheries-dependent data-the main source of information for assessment and management-are no longer available, creating a conundrum for future management. An example is U.S. goliath grouper which have been protected for nearly 30 years, leading to discontent among some stakeholders. This has prompted managers to consider re-opening the fishery, even though population status is unknown due to uncertainties driven by data limitations. The goal of this dissertation is to provide information supporting goliath grouper management decisions by evaluating assessment method and data sources as well as drivers of stakeholder management preferences.
Advisors/Committee Members: LORENZEN,KAI (committee chair), BAKER,SHIRLEY M (committee member), ST MARY,COLETTE MARIE (committee member), BARBIERI,LUIZ (committee member).
Subjects/Keywords: modeling – sem – simulations
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Friess, C. (2018). Assessing and Managing a Fishery under Moratorium The Case of the Recovering Goliath Grouper (Epinephelus itajara) in Florida. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0053975
Chicago Manual of Style (16th Edition):
Friess, Claudia. “Assessing and Managing a Fishery under Moratorium The Case of the Recovering Goliath Grouper (Epinephelus itajara) in Florida.” 2018. Doctoral Dissertation, University of Florida. Accessed March 01, 2021.
https://ufdc.ufl.edu/UFE0053975.
MLA Handbook (7th Edition):
Friess, Claudia. “Assessing and Managing a Fishery under Moratorium The Case of the Recovering Goliath Grouper (Epinephelus itajara) in Florida.” 2018. Web. 01 Mar 2021.
Vancouver:
Friess C. Assessing and Managing a Fishery under Moratorium The Case of the Recovering Goliath Grouper (Epinephelus itajara) in Florida. [Internet] [Doctoral dissertation]. University of Florida; 2018. [cited 2021 Mar 01].
Available from: https://ufdc.ufl.edu/UFE0053975.
Council of Science Editors:
Friess C. Assessing and Managing a Fishery under Moratorium The Case of the Recovering Goliath Grouper (Epinephelus itajara) in Florida. [Doctoral Dissertation]. University of Florida; 2018. Available from: https://ufdc.ufl.edu/UFE0053975
California State University – Chico
10.
Yusta, Jowel I.
Generic high speed simulations using FPGAS
.
Degree: 2012, California State University – Chico
URL: http://hdl.handle.net/10211.4/459
► There have been simulations performed on FPGAs which are fast and efficient, but the amount of time it takes to create such simulations makes it…
(more)
▼ There have been
simulations performed on FPGAs which are fast and efficient,
but the amount of time it takes to create such
simulations makes it impractical for
most applications. This study will prove that it is possible to make a FPGA based simulator
that is fast, efficient, and that does not require a redesign for each new simulation.
This simulator will combine the ease of conventional PC simulation environments with
the speed and processing power of FPGA based
simulations in one package. The resulting
system advances FPGA
simulations bringing it to the masses. Simplifying the process
allows high speed real-time
simulations to be performed on FPGAs where they may
not normally be considered. In this thesis a FPGA based generic simulator will be developed
and presented that will prove it is possible to make a fast efficient simulator
package. The end result of this study is a system design that combines the benefits of
FPGA based simulation with the ease of a simulation package.
Advisors/Committee Members: Zenor, John Julian (advisor).
Subjects/Keywords: FPGA simulations PC
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yusta, J. I. (2012). Generic high speed simulations using FPGAS
. (Thesis). California State University – Chico. Retrieved from http://hdl.handle.net/10211.4/459
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yusta, Jowel I. “Generic high speed simulations using FPGAS
.” 2012. Thesis, California State University – Chico. Accessed March 01, 2021.
http://hdl.handle.net/10211.4/459.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yusta, Jowel I. “Generic high speed simulations using FPGAS
.” 2012. Web. 01 Mar 2021.
Vancouver:
Yusta JI. Generic high speed simulations using FPGAS
. [Internet] [Thesis]. California State University – Chico; 2012. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10211.4/459.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yusta JI. Generic high speed simulations using FPGAS
. [Thesis]. California State University – Chico; 2012. Available from: http://hdl.handle.net/10211.4/459
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
11.
Sahali, Mohand Akli.
Evaluation des effets des paramètres du tournage : modélisation et optimisation multi-objectifs basées sur des méthodes de soft computing – stratégies et précision.
Degree: 2016, Université M'Hamed Bougara Boumerdès
URL: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2938
► 173 p. : ill. ; 30 cm
La quasi-totalité des travaux, dédiés à l'optimisation des paramètres de coupe en tournage, repose sur des stratégies d’optimisation…
(more)
▼ 173 p. : ill. ; 30 cm
La quasi-totalité des travaux, dédiés à l'optimisation des paramètres de coupe en tournage, repose sur des stratégies d’optimisation classiques, qui ont toutefois été appliquées efficacement à l'échelle industrielle. Cependant, la robustesse et la fiabilité de ce procédé ont été négligées à tort, car l'existence de quelques facteurs incontrôlables peut altérer la justesse des résultats obtenus et affecter d’écarts risquant de dégrader la qualité des pièces usinées, la productivité et le matériel usinant. Dans un premier temps, nous avons identifié les sources d’incertitudes relatives au procédé de tournage. Puis la quantification et la modélisation des incertitudes ainsi que la maîtrise des mesures de robustesse basée sur différents critères statistiques nous ont permis de développer une approche pour l’optimisation multi-objectifs des paramètres de coupe en nous basant sur une technique d’optimisation innovante de la classe des Soft-Computing, qui a permis de déterminer et de départager les optima performants, robustes et fiables. Nous avons, à cet effet, développé et implémenté sous Matlab™, un algorithme génétique efficient de type Monte Carlo-Genetic Algorithm, intégrant un mécanisme d’évaluation robuste de la fonction « fitness » basée sur les simulations de Monte-Carlo pour le seul calcul de la mesure de robustesse. Cette première approche a été validée, après une application illustrative pour la minimisation du coût et du temps de production sous contraintes des limitations de production liées au système Pièce-Outil-Machine, ayant permis la détermination des résultats performants et robustes, ainsi que leur identification. Cette approche a également montré des limitations concernant la satisfaction des contraintes de production imposées. Dans un deuxième temps, une approche fiabiliste pour l’optimisation multi-objectifs est proposée, introduisant un concept de fiabilité pragmatique basé sur des probabilités de défaillance pour contourner et maîtriser le risque de violation des contraintes d’optimisation stochastiques. Cette deuxième approche est basée sur l’algorithme génétique de tri non dominé probabiliste, dit P-NSGA-II, qui intègre les simulations Monte-Carlo pour un calcul précis aussi bien de la fiabilité, que de la robustesse. L’efficience et l'efficacité de cette approche ont été vérifiées par la résolution de deux problèmes numériques de référence. Les deux cas d’étude traités, qui sont d’une extrême complexité, sont relatifs aux opérations d’ébauche multi-passes et de finition, et se caractérisent par des espaces de recherche, respectivement «clos» et « déformé ». Dans les deux situations explorées, les solutions optimales obtenues par la mise en oeuvre de l'algorithme P-NSGA-II, sont analysées, discutées et comparées avec les résultats obtenus et publiés dans des travaux de recherche de références. En conclusion, cette approche a permis de générer et de départager de façon efficace et précise des solutions performantes, robustes et fiables
Subjects/Keywords: Modélisation; Tournage; Simulations Monte-Carlo
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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APA (6th Edition):
Sahali, M. A. (2016). Evaluation des effets des paramètres du tournage : modélisation et optimisation multi-objectifs basées sur des méthodes de soft computing – stratégies et précision. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2938
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sahali, Mohand Akli. “Evaluation des effets des paramètres du tournage : modélisation et optimisation multi-objectifs basées sur des méthodes de soft computing – stratégies et précision.” 2016. Thesis, Université M'Hamed Bougara Boumerdès. Accessed March 01, 2021.
http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2938.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sahali, Mohand Akli. “Evaluation des effets des paramètres du tournage : modélisation et optimisation multi-objectifs basées sur des méthodes de soft computing – stratégies et précision.” 2016. Web. 01 Mar 2021.
Vancouver:
Sahali MA. Evaluation des effets des paramètres du tournage : modélisation et optimisation multi-objectifs basées sur des méthodes de soft computing – stratégies et précision. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2016. [cited 2021 Mar 01].
Available from: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2938.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sahali MA. Evaluation des effets des paramètres du tournage : modélisation et optimisation multi-objectifs basées sur des méthodes de soft computing – stratégies et précision. [Thesis]. Université M'Hamed Bougara Boumerdès; 2016. Available from: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2938
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Victoria
12.
Millman, Eamon G.
Analyzing MANET jamming strategies.
Degree: MA, 2011, University of Victoria
URL: http://hdl.handle.net/1828/3718
► Mobile Ad hoc Wireless Networks (MANETs) present a new paradigm in which to realize a variety of communication technologies and services. The use of stochastic…
(more)
▼ Mobile Ad hoc Wireless Networks (MANETs) present a new
paradigm in which to realize a variety of communication
technologies and services. The use of stochastic event-based
simulation is a common approach to modelling MANET operations as
part of the engineering process. To improve observations many
simulations are of- ten averaged together to produce estimations of
MANET operation; however, to be statistically meaningful start-up
transients must be removed, and only ergodic data averaged. These
statistical issues of stationarity and ergodicity are often
approached in an ad-hoc manner, if at all. This thesis presents a
formal method to address these two statistical issues and applies
it to the problem of quantifying MANET operation under different
physical-layer jamming strategies. This demonstration illustrates
the complex nature of MANET operation and the need for rigorous
statistical analysis as part of the engineering
process.
Graduate
Advisors/Committee Members: Neville, Stephen William (supervisor).
Subjects/Keywords: wireless networks; simulations; engineering
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Manager
APA (6th Edition):
Millman, E. G. (2011). Analyzing MANET jamming strategies. (Masters Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/3718
Chicago Manual of Style (16th Edition):
Millman, Eamon G. “Analyzing MANET jamming strategies.” 2011. Masters Thesis, University of Victoria. Accessed March 01, 2021.
http://hdl.handle.net/1828/3718.
MLA Handbook (7th Edition):
Millman, Eamon G. “Analyzing MANET jamming strategies.” 2011. Web. 01 Mar 2021.
Vancouver:
Millman EG. Analyzing MANET jamming strategies. [Internet] [Masters thesis]. University of Victoria; 2011. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1828/3718.
Council of Science Editors:
Millman EG. Analyzing MANET jamming strategies. [Masters Thesis]. University of Victoria; 2011. Available from: http://hdl.handle.net/1828/3718
University of Manchester
13.
Pearce, Francesca.
Simulations of galaxy clusters.
Degree: 2020, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:325093
► Galaxy clusters are the largest virialised objects in the present-day Universe. Clusters are complex systems which can be used as a cosmological probe as they…
(more)
▼ Galaxy clusters are the largest virialised objects
in the present-day Universe. Clusters are complex systems which can
be used as a cosmological probe as they trace the large-scale mass
distribution, but they also incorporate non-gravitational processes
which make them excellent tests of galaxy formation and evolution.
Due to the extremely complex nature of galaxy clusters, numerical
simulations are increasingly important in order to test and
understand all the different astrophysical processes that are
involved in galaxies and galaxy clusters, which can be informed by
and compared to observations. In this thesis, we have used the low
resolution CELR sample to produce more evidence for a mass
dependence of the hydrostatic mass biass, which increases from
around 20 per cent to 40 per cent in the most massive objects. It
is important to understand and characterise this bias in order to
use clusters for cosmology. We have also looked at the metallicity
distribution of the C-EAGLE clusters and found that, in general,
the cluster outskirts are compatible with the early enrichment
model. The C-EAGLE clusters show considerable evolution in the core
as a result of accretion of low metallicity gas, suggesting that
active galactic nuclei have a bigger impact on metals in cluster
cores than has previously been seen. Finally, we have designed and
tested a module to reduce the distribution of gas particle masses
in cosmological
simulations to preserve the underlying smoothed
particle hydrodynamics which assume a constant particle mass. This
module was successfully implemented in the EAGLE cosmological code,
but was unable to stop the formation of entropy cores in
clusters.
Advisors/Committee Members: JACKSON, NEAL NJF, Kay, Scott, Jackson, Neal.
Subjects/Keywords: Galaxy clusters; Simulations; Cosmology
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pearce, F. (2020). Simulations of galaxy clusters. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:325093
Chicago Manual of Style (16th Edition):
Pearce, Francesca. “Simulations of galaxy clusters.” 2020. Doctoral Dissertation, University of Manchester. Accessed March 01, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:325093.
MLA Handbook (7th Edition):
Pearce, Francesca. “Simulations of galaxy clusters.” 2020. Web. 01 Mar 2021.
Vancouver:
Pearce F. Simulations of galaxy clusters. [Internet] [Doctoral dissertation]. University of Manchester; 2020. [cited 2021 Mar 01].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:325093.
Council of Science Editors:
Pearce F. Simulations of galaxy clusters. [Doctoral Dissertation]. University of Manchester; 2020. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:325093
University of Manchester
14.
Gendron, Rieul.
The Frequency of Extrasolar Planet Detections with
Microlensing Simulations.
Degree: 2011, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:120394
► To date, over 500 extrasolar planets have been discovered. The microlensing planets, although relatively few in number, probe a region of the planet mass versus…
(more)
▼ To date, over 500 extrasolar planets have been
discovered. The microlensing planets, although relatively few in
number, probe a region of the planet mass versus semi-major axis
plane that is currently out of reach of the other methods, with the
sensitivity peaking just beyond ∼ 1 AU. Microlensing planets
are therefore very useful for placing constraints on planet
formation models.We simulate light curves for 1000 extrasolar
planet systems around host stars of mass
0.25\,\,{{M}}
\odot, drawn from the Ida \& Lin core
accretion models of planet formation, to determine the frequency of
single and multiple planet perturbations. The simulated data is
first fitted with a single-lens model. If the fit is poor,
combinations of the planets most likely to be causing perturbations
are placed around the star and new light curves are generated to
attempt to reproduce the original light curve. It was found that
the majority of the light curves were well-fitted by single-lens
models, corresponding to the absence of planetary signals. However,
26 were determined to contain pertubations due to at least one
planet. Of the 26 interesting light curves, it was found that 16
could be explained by the presence of a single planet. A greater
number of planets were necessary to explain the remaining 10 cases.
The fraction of planetary events to all microlensing events was
found to be 0.026
+0.006-0.005, while the fraction of
multiple-planet events to planetary events was
0.38
+0.10-0.09, increasing to 0.50
+0.17-0.17 when
only the relatively high-magnification events (those with impact
parameter <0.05) were considered. Although we can be confident
that the single-planet events would correspond to single-planet
detections, some (or all) of the multiple-planet events might be
degenerate with single-planet cases (or more generally systems
possessing a fewer number of planets). Hence, the latter fraction
is an upper limit on the ratio of multiple-planet
{\emph{detections}} to planetary events.
Advisors/Committee Members: Mao, Shude.
Subjects/Keywords: extrasolar planets; microlensing; simulations
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gendron, R. (2011). The Frequency of Extrasolar Planet Detections with
Microlensing Simulations. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:120394
Chicago Manual of Style (16th Edition):
Gendron, Rieul. “The Frequency of Extrasolar Planet Detections with
Microlensing Simulations.” 2011. Doctoral Dissertation, University of Manchester. Accessed March 01, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:120394.
MLA Handbook (7th Edition):
Gendron, Rieul. “The Frequency of Extrasolar Planet Detections with
Microlensing Simulations.” 2011. Web. 01 Mar 2021.
Vancouver:
Gendron R. The Frequency of Extrasolar Planet Detections with
Microlensing Simulations. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2021 Mar 01].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:120394.
Council of Science Editors:
Gendron R. The Frequency of Extrasolar Planet Detections with
Microlensing Simulations. [Doctoral Dissertation]. University of Manchester; 2011. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:120394
Cornell University
15.
Aveiro, Henrique.
Numerical Simulations And Observations Of Equatorial F Region Plasma Irregularities.
Degree: PhD, Electrical Engineering, 2012, Cornell University
URL: http://hdl.handle.net/1813/31041
► This dissertation describes a theoretical, experimental, and modeling investigation of the plasma irregularities in equatorial spread F (ESF). The primary scientific objective is to evaluate…
(more)
▼ This dissertation describes a theoretical, experimental, and modeling investigation of the plasma irregularities in equatorial spread F (ESF). The primary scientific objective is to evaluate the electrodynamic nature of equatorial F region plasma instabilities. In particular, the difference between two-dimensional and three-dimensional electrodynamic effects on the onset and evolution of equatorial instabilities is investigated. Statistical studies are performed using the Jicamarca Unattended Long Term Investigations of the Ionosphere and Atmosphere (JULIA) radar at Jicamarca. The climatology, persistence, and the correlation with the phase of the moon of equatorial spread F irregularities are evaluated, and different forecasting tools are compared. A three dimensional electrostatic numerical model of the equatorial ionosphere using a finite volume method transport scheme is described. The model incorporates realistic ionospheric conductivities, electric fields, and winds. The model is capable of reproducing the full complement of relevant equatorial F region ionospheric plasma instabilities under realistic conditions, including bottomside shear flow. Of chief importance is the so-called "collisional shear instability" which has come to light recently as a potentially important mechanism in the initiation of ESF. This instability has a faster growth rate than the conventional generalized Rayleigh Taylor (gRT) instability under typical post-sunset conditions. The combination of gRT and CSI produces an instability which develops into an intense ESF event more quickly and with more realistic characteristics than the other two independently in
simulations. The model is initialized with data acquired by the C/NOFS satellite, the Jicamarca Radio Observatory, ALTAIR radar, and other ground-based instruments. The forecast potential of the simulation is evaluated through a number of "after the fact" case studies. Various diagnostic codes are used to validate the
simulations. To compute the magnetic induction due to ionospheric currents, for example, we solve the partial differencial equation resulting from the Amp` re's law for magnetostatics. Airglow emissions corresponding to the sime ulation runs are likewise computed for the 6300-Å (or oxygen red) line. Simulated airglow images are obtained through the integration of the volume emission rates along the camera line of sight. Coherent/incoherent scatter
simulations corresponding to the model runs show the typical three stages of ESF evolution, from bottom-type to bottomside to topside ESF. Some of the features that the simulated electron density maps share with ALTAIR scans include westward tilted ascending depletions connected to the bottomside, periodic spacing of 100-200 km in the zonal direction, bifurcation, secondary instabilities growing on the western walls of the primaries, and rates of development. The main goal of these studies has been both to verify the efficacy of the simulation code and its forecast potential while also placing these common but ambiguous…
Advisors/Committee Members: Hysell, David Lee (chair), Diamessis, Peter J. (committee member), Kelley, Michael Charles (committee member), Seyler, Charles Eugene (committee member).
Subjects/Keywords: Plasma Physics; Numerical Simulations; Aeronomy
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APA (6th Edition):
Aveiro, H. (2012). Numerical Simulations And Observations Of Equatorial F Region Plasma Irregularities. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/31041
Chicago Manual of Style (16th Edition):
Aveiro, Henrique. “Numerical Simulations And Observations Of Equatorial F Region Plasma Irregularities.” 2012. Doctoral Dissertation, Cornell University. Accessed March 01, 2021.
http://hdl.handle.net/1813/31041.
MLA Handbook (7th Edition):
Aveiro, Henrique. “Numerical Simulations And Observations Of Equatorial F Region Plasma Irregularities.” 2012. Web. 01 Mar 2021.
Vancouver:
Aveiro H. Numerical Simulations And Observations Of Equatorial F Region Plasma Irregularities. [Internet] [Doctoral dissertation]. Cornell University; 2012. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1813/31041.
Council of Science Editors:
Aveiro H. Numerical Simulations And Observations Of Equatorial F Region Plasma Irregularities. [Doctoral Dissertation]. Cornell University; 2012. Available from: http://hdl.handle.net/1813/31041
Vanderbilt University
16.
Dunn, Glenna Caitlin.
Direct collapse black hole formation and assembly in cosmological simulations.
Degree: PhD, Astronomy, 2019, Vanderbilt University
URL: http://hdl.handle.net/1803/13054
► Observations of our own galaxy and others near and far demonstrate that massive black holes live at the centers of most galaxies. The origin of…
(more)
▼ Observations of our own galaxy and others near and far demonstrate that massive black holes live at the centers of most galaxies. The origin of these black holes is the
subject of much debate. We study the birth of these supermassive black holes from the direct collapse process and characterize sites where these black hole seeds form. This work tests the power of the direct collapse model in a self-consistent, time-dependent, non-uniform Lyman-Werner radiation field using an updated version of the N-body+SPH code Gasoline. Our results from this work demonstrate that, in contrast with existing models that restrict direct collapse to completely pristine halos, direct collapse black hole seeds can form in rare pockets of low-metallicity gas in halos with recent star formation. We then combine semi-analytic modeling with these cosmological zoom-in
simulations of a Milky Way-type galaxy to investigate the role of black hole spin and gravitational recoil in the epoch of massive black hole seeding. When two black holes merge, the asymmetric emission of gravitational waves provides an impulse to the merged system. This gravitational wave recoil velocity can be up to 4000 km/s, easily large enough for the black hole to escape its host galaxy. We sample four different spin alignment distributions and compare the resulting merger histories, occupation fractions, and black hole-host relations with what is expected by excluding the effect of recoil. The inclusion of gravitational recoil and black hole spin in the assembly of massive black hole seeds can reduce the final z=5 black hole mass by more than an order of magnitude. The black hole occupation fraction, however, remains effectively unaltered due to repeated episodes of black hole formation following a recoil event. While electromagnetic detections of these events are unlikely, the upcoming Laser Interferometer Space Antenna (LISA) is ideally suited to detect gravitational wave signals from such events.
Advisors/Committee Members: Andreas Berlind (committee member), Will French (committee member), David Weintraub (committee member), Jillian Bellovary (committee member), Kelly Holley-Bockelmann (Committee Chair).
Subjects/Keywords: black holes; galaxies; simulations; astrophysics
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APA (6th Edition):
Dunn, G. C. (2019). Direct collapse black hole formation and assembly in cosmological simulations. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/13054
Chicago Manual of Style (16th Edition):
Dunn, Glenna Caitlin. “Direct collapse black hole formation and assembly in cosmological simulations.” 2019. Doctoral Dissertation, Vanderbilt University. Accessed March 01, 2021.
http://hdl.handle.net/1803/13054.
MLA Handbook (7th Edition):
Dunn, Glenna Caitlin. “Direct collapse black hole formation and assembly in cosmological simulations.” 2019. Web. 01 Mar 2021.
Vancouver:
Dunn GC. Direct collapse black hole formation and assembly in cosmological simulations. [Internet] [Doctoral dissertation]. Vanderbilt University; 2019. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1803/13054.
Council of Science Editors:
Dunn GC. Direct collapse black hole formation and assembly in cosmological simulations. [Doctoral Dissertation]. Vanderbilt University; 2019. Available from: http://hdl.handle.net/1803/13054
McMaster University
17.
Rucska, Josef J.
Numerical investigations of the early stages of planet formation.
Degree: MSc, 2018, McMaster University
URL: http://hdl.handle.net/11375/24281
► Dust grains are a crucial component of disks around young stellar systems where current observations and theory show that planets form. Dust grains must grow…
(more)
▼ Dust grains are a crucial component of disks around young stellar systems where current observations and theory show that planets form. Dust grains must grow 10 orders of magnitude in size to become planets. However, one of the early steps in this growth phase faces stringent theoretical constraints. The metre barrier relates to two well-studied physical mechanisms which inhibit grain growth beyond centimetre sizes. We report on numerical studies which probe these early stages of planet formation including instabilities that promote dust concentration such as the streaming instability (SI). We explore several different SPH models for dusty gas evolution. We find the linear SI is difficult for SPH to capture because it begins with perturbations below the 1% level. We also employ the Athena 3rd order Eulerian code which has been used to study the SI in the linear phase and the non-linear or saturated phase. We present numerical confirmations of recent analytical predictions of enhancements to the SI growth rates caused by the dust settling to the disk midplane in the earliest stages of the protoplanetary disk evolution. Symmetric analytical predictions for SI growth are not directly relevant to the non-axisymetric, planar geometry of the saturated, non-linear phase. We lay the ground work to explore this in future work.
Thesis
Master of Science (MSc)
Advisors/Committee Members: Wadsley, James, Physics and Astronomy.
Subjects/Keywords: planets; formation; numerical simulations; instability
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APA (6th Edition):
Rucska, J. J. (2018). Numerical investigations of the early stages of planet formation. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/24281
Chicago Manual of Style (16th Edition):
Rucska, Josef J. “Numerical investigations of the early stages of planet formation.” 2018. Masters Thesis, McMaster University. Accessed March 01, 2021.
http://hdl.handle.net/11375/24281.
MLA Handbook (7th Edition):
Rucska, Josef J. “Numerical investigations of the early stages of planet formation.” 2018. Web. 01 Mar 2021.
Vancouver:
Rucska JJ. Numerical investigations of the early stages of planet formation. [Internet] [Masters thesis]. McMaster University; 2018. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/11375/24281.
Council of Science Editors:
Rucska JJ. Numerical investigations of the early stages of planet formation. [Masters Thesis]. McMaster University; 2018. Available from: http://hdl.handle.net/11375/24281
McMaster University
18.
Woods, Rory.
A New Approach to Radiative Transfer in Galaxies.
Degree: PhD, 2015, McMaster University
URL: http://hdl.handle.net/11375/18234
► In this thesis, we present a novel algorithm for computing the radiation field in astrophysical simulations. The algorithm is tree-based, similar to many gravity solvers,…
(more)
▼ In this thesis, we present a novel algorithm for computing the radiation field in
astrophysical simulations. The algorithm is tree-based, similar to many gravity
solvers, and allows computation of radiative transfer in O(Nsink logNsource) in
cases without absorption, and O(Nsink logNsource logN) time with absorption.
The algorithm scales well with the number of processors due to its tree-based
nature, and is highly tunable in accuracy and speed. It is also only weakly
dependent on both the energy band and the number of energy bands used.
We provide a suite of tests of the code showing its ability to create accurate
fluxes, ionization fronts, hydrodynamics coupling, and shadowing.
We apply the algorithm in a set of simulations on an isolated spiral
galaxy from the AGORA project. The algorithm is used to calculate FUV
fields within the galaxy, which self-consistently sets the dominant photoelectric
heating in the gas. This has never before been performed in galaxy simulations.
We find, in agreement with Ostriker et al. [2010], that FUV can be a very
important regulation mechanism for star formation in a galaxy. Depending
on the assumed opacity, FUV can decrease the average star formation rate
(SFR) anywhere from 15% to a factor of twenty. We compare this regulation
mechanism to a highly effective model of supernovae (SNe) feedback, which
reduces the SFR by a factor of twenty as well. However, SNe feedback destroys
most of the gas structure in the process, whereas FUV has minimal impact on
the gas structure.
In the simulations with FUV radiation, we are also able to create a two
phase medium that is a function of the mean FUV intensity the gas receives.
Finally, we find that simulations with FUV agree well with observations of
nearby spirals on the Kennicutt-Schmidt relation, at least at gas surface densities
of 0.2 - 30 M⊙. At surface densities higher than 30 M⊙, we find that
FUV is not an effective regulator which is consistent with arguments that SNe
or other feedback mechanisms should become the primary regulator.
Thesis
Doctor of Philosophy (PhD)
Advisors/Committee Members: Wadsley, James, Couchman, Hugh, Physics and Astronomy.
Subjects/Keywords: methods:numerical; methods:radiation; simulations: galaxy
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APA (6th Edition):
Woods, R. (2015). A New Approach to Radiative Transfer in Galaxies. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/18234
Chicago Manual of Style (16th Edition):
Woods, Rory. “A New Approach to Radiative Transfer in Galaxies.” 2015. Doctoral Dissertation, McMaster University. Accessed March 01, 2021.
http://hdl.handle.net/11375/18234.
MLA Handbook (7th Edition):
Woods, Rory. “A New Approach to Radiative Transfer in Galaxies.” 2015. Web. 01 Mar 2021.
Vancouver:
Woods R. A New Approach to Radiative Transfer in Galaxies. [Internet] [Doctoral dissertation]. McMaster University; 2015. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/11375/18234.
Council of Science Editors:
Woods R. A New Approach to Radiative Transfer in Galaxies. [Doctoral Dissertation]. McMaster University; 2015. Available from: http://hdl.handle.net/11375/18234
Penn State University
19.
Zhang, Wenlin.
Predicting molecular properties and phase behaviors for conjugated polymers.
Degree: 2017, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/14218wwz5031
► Conjugated polymers, though still outperformed by their inorganic counterparts, are promising materials for flexible electronics, including field-effect transistors and solar cells. The mechanical and electrical…
(more)
▼ Conjugated polymers, though still outperformed by their inorganic counterparts, are promising materials for flexible electronics, including field-effect transistors and solar cells. The mechanical and electrical properties of this class of materials depend strongly on the morphological order. In order to design new materials and optimize existing polymers, establishing concrete links between fundamental molecular properties and structural order is necessary. As consequence, the ability to predict the properties of novel materials from their molecular structures is essential.
This dissertation focuses on predicting fundamental properties and phase be- haviors of conjugated polymers from molecular structures. We develop tools and methods, combining molecular
simulations and analytical theories, to predict ma- terial parameters, including the chain stiffness, the nematic coupling constant, and the Flory-Huggins χ parameter, for conjugated polymers. These fundamental parameters govern the mesoscale structures and phase behaviors for chains in melts and solutions, in turn affect the mechanical and electrical properties of conjugated polymers in the final semi-crystalline state.
Using molecular dynamics (MD)
simulations, we also investigate the role of thermal fluctuations in the performance of crystalline conjugated polymers. We show that thermal fluctuations can lead to cumulative lattice disorder in conjugated polymers, in turn enhance the inter-chain charge transport. Because the fluctuations of crystal shape are related to the mechanical properties of conjugated polymers, we can also obtain the elastic moduli for crystalline conjugated polymers by measuring the fluctuating box sizes in MD
simulations.
Altogether, this dissertation reports our progress on predicting the electrical and mechanical properties from molecular structures for conjugated polymers in both the precursor (melt and solution) and the crystalline states. Our results lay the foundation for understanding the structure-property relations of conjugated polymers in their final semicrystalline forms.
Advisors/Committee Members: Scott Thomas Milner, Dissertation Advisor/Co-Advisor, Scott Thomas Milner, Committee Chair/Co-Chair, Enrique Daniel Gomez, Committee Member, Kristen Ann Fichthorn, Committee Member, William George Noid, Outside Member.
Subjects/Keywords: Conjugated Polymers; Molecular Simulations
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CSE |
Export
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Manager
APA (6th Edition):
Zhang, W. (2017). Predicting molecular properties and phase behaviors for conjugated polymers. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/14218wwz5031
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhang, Wenlin. “Predicting molecular properties and phase behaviors for conjugated polymers.” 2017. Thesis, Penn State University. Accessed March 01, 2021.
https://submit-etda.libraries.psu.edu/catalog/14218wwz5031.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhang, Wenlin. “Predicting molecular properties and phase behaviors for conjugated polymers.” 2017. Web. 01 Mar 2021.
Vancouver:
Zhang W. Predicting molecular properties and phase behaviors for conjugated polymers. [Internet] [Thesis]. Penn State University; 2017. [cited 2021 Mar 01].
Available from: https://submit-etda.libraries.psu.edu/catalog/14218wwz5031.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhang W. Predicting molecular properties and phase behaviors for conjugated polymers. [Thesis]. Penn State University; 2017. Available from: https://submit-etda.libraries.psu.edu/catalog/14218wwz5031
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Waterloo
20.
Lee, Yong Hwan.
Transition Matrix Monte Carlo Methods for Complex Systems.
Degree: 2019, University of Waterloo
URL: http://hdl.handle.net/10012/14525
► The aim of this thesis is to develop efficient transition matrix Monte Carlo simulation methods for complex systems(e.g., spin glasses) that enable one to construct…
(more)
▼ The aim of this thesis is to develop efficient transition matrix Monte Carlo simulation methods for complex systems(e.g., spin glasses) that enable one to construct the transition matrix from which the density of states is calculated with high accuracy. In this thesis, I explore a series of the transition matrix Monte Carlo techniques that are newly developed to generate the density of states with high accuracy for various systems that exhibit phase transitions. The Ising model and the Potts model are used to demonstrate the performance of each methods. Especially, the specific heat curve of the two-dimensional Ising model is evaluated and compared to the exact result as a stringent accuracy test in many cases. I extend the \emph{monovariate} multicanonical transition matrix Monte Carlo method to a \emph{bivariate} version for the calculation of the joint density of states which depends on the energy and a second variable associated with the order parameter. This bivariate version is applied to the Edward-Anderson spin glass model which is one of the most challenging model in the field of computer simulation.
After presenting the theoretical basis of the transition matrix Monte Carlo method, I explain the regulated temperature method which populates the transition matrix by the Metropolis algorithm with continuously varying temperature according to a certain schedule. I introduce new techniques that can produce the optimized temperature schedule in the context of the two-dimensional Ising model. Next I proceed to present the multicanonical transition matrix Monte Carlo method in which the transition matrix is constructed through the multicanonical iteration procedure. Although this method itself is faster than other existing techniques such as the broad histogram method and Wang-Landau algorithm, its simulation speed can be further increased by the renormalization idea which utilizes the simulation results for a small system to obtain an accurate initial estimate of the density of states for a large system through the convolution procedures. Especially a novel procedure about how to apply the renormalization idea in multiple dimensions is presented.
To study the critical behavior of the spin glasses, to my knowledge for the first time, I employ the \emph{bivariate} multicanonical sampling to construct the transition tensor from which the joint density of states can be calculated with high accuracy. I introduce a calculation technique that transforms the massive transition tensor to a normal transition matrix to avoid the cumbersome manipulation of tensors. Using the joint density of states, Landau free energies, the probability distribution functions of spin overlap and Binder parameters are calculated. Contrary to the majority of the previous reports in the literature, the results of my method provide evidences that nonzero temperature phase transition occurs in the two-dimensional Ising spin glass. For the ± J Ising spin glass, the critical temperature obtained by my method is Tc/J \approx 0.45…
Subjects/Keywords: Monte Carlo simulations; spin glass
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APA ·
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MLA ·
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CSE |
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Manager
APA (6th Edition):
Lee, Y. H. (2019). Transition Matrix Monte Carlo Methods for Complex Systems. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/14525
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lee, Yong Hwan. “Transition Matrix Monte Carlo Methods for Complex Systems.” 2019. Thesis, University of Waterloo. Accessed March 01, 2021.
http://hdl.handle.net/10012/14525.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lee, Yong Hwan. “Transition Matrix Monte Carlo Methods for Complex Systems.” 2019. Web. 01 Mar 2021.
Vancouver:
Lee YH. Transition Matrix Monte Carlo Methods for Complex Systems. [Internet] [Thesis]. University of Waterloo; 2019. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10012/14525.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lee YH. Transition Matrix Monte Carlo Methods for Complex Systems. [Thesis]. University of Waterloo; 2019. Available from: http://hdl.handle.net/10012/14525
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Université de Montréal
21.
Perez, Danny.
Étude des mécanismes d'ablation laser par impulsions ultra-courtes à l'aide de la dynamique moléculaire.
Degree: 2003, Université de Montréal
URL: http://hdl.handle.net/1866/14744
Subjects/Keywords: Simulations numériques
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APA (6th Edition):
Perez, D. (2003). Étude des mécanismes d'ablation laser par impulsions ultra-courtes à l'aide de la dynamique moléculaire. (Thesis). Université de Montréal. Retrieved from http://hdl.handle.net/1866/14744
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Perez, Danny. “Étude des mécanismes d'ablation laser par impulsions ultra-courtes à l'aide de la dynamique moléculaire.” 2003. Thesis, Université de Montréal. Accessed March 01, 2021.
http://hdl.handle.net/1866/14744.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Perez, Danny. “Étude des mécanismes d'ablation laser par impulsions ultra-courtes à l'aide de la dynamique moléculaire.” 2003. Web. 01 Mar 2021.
Vancouver:
Perez D. Étude des mécanismes d'ablation laser par impulsions ultra-courtes à l'aide de la dynamique moléculaire. [Internet] [Thesis]. Université de Montréal; 2003. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1866/14744.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Perez D. Étude des mécanismes d'ablation laser par impulsions ultra-courtes à l'aide de la dynamique moléculaire. [Thesis]. Université de Montréal; 2003. Available from: http://hdl.handle.net/1866/14744
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
22.
Baertschiger, Thierry.
Non-linear structure formation in the gravitational "N"-body
problem.
Degree: 2004, Université de Genève
URL: http://doc.rero.ch/record/5185
► Cette thèse traite de la formation de structures dans des systèmes à "N"-corps gravitationnels: comment, un ensemble infini de particules, initialement au repos et distribuées…
(more)
▼ Cette thèse traite de la formation de structures dans
des systèmes à "N"-corps gravitationnels: comment, un ensemble
infini de particules, initialement au repos et distribuées de
manière homogène dans tout l'espace, évolue sous l'action de sa
propre gravité, et donne notamment lieu à des amas de particules,
ou clusters, dont la taille augmente avec le temps. L'étude des
mécanismes qui entrent en jeu dans cette évolution est basée sur
l'analyse de
simulations numériques. Une attention particulière est
portée aux effets de la nature discrète des particules. Cet aspect
n'est que très peu discuté dans la littérature puisque la plupart
des travaux sont réalisés dans un cadre "continu", c'est-à-dire en
considérant que les particules forment une distribution continue de
matière dont l'évolution peut être décrite par des équations
différentielles aux dérivées partielles.
Advisors/Committee Members: Ruth (Dir.).
Subjects/Keywords: numerical simulations
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Export
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APA (6th Edition):
Baertschiger, T. (2004). Non-linear structure formation in the gravitational "N"-body
problem. (Thesis). Université de Genève. Retrieved from http://doc.rero.ch/record/5185
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Baertschiger, Thierry. “Non-linear structure formation in the gravitational "N"-body
problem.” 2004. Thesis, Université de Genève. Accessed March 01, 2021.
http://doc.rero.ch/record/5185.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Baertschiger, Thierry. “Non-linear structure formation in the gravitational "N"-body
problem.” 2004. Web. 01 Mar 2021.
Vancouver:
Baertschiger T. Non-linear structure formation in the gravitational "N"-body
problem. [Internet] [Thesis]. Université de Genève; 2004. [cited 2021 Mar 01].
Available from: http://doc.rero.ch/record/5185.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Baertschiger T. Non-linear structure formation in the gravitational "N"-body
problem. [Thesis]. Université de Genève; 2004. Available from: http://doc.rero.ch/record/5185
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Iowa
23.
Lay, Wesley K.
Optimizing computer simulation models for carbohydrates and proteins at the atomistic and coarse-grained level.
Degree: PhD, Biochemistry, 2018, University of Iowa
URL: https://ir.uiowa.edu/etd/6603
► Computer simulations allow researchers to study the dynamics and interactions of biological molecules in ways that cannot be currently achieved in experiments. In this…
(more)
▼ Computer
simulations allow researchers to study the dynamics and interactions of biological molecules in ways that cannot be currently achieved in experiments. In this work, I have used computer
simulations to study the following systems: (1) carbohydrate-carbohydrate and carbohydrate-amino acid interactions using all-atom molecular dynamics
simulations, and (2) protein-protein interactions using coarse-grained implicit solvent models. My first studies involved simulating carbohydrate and amino acid systems using atomistic force fields. During my initial
simulations, I observed that carbohydrates were interacting too favorably leading them to aggregate in conditions under which they experimentally remain soluble. To alleviate this issue, I surgically modified the carbohydrate-carbohydrate interaction parameters in order to match osmotic pressure data from experiment. This approach was successful while preserving many of the correct features of the original force field. Next, I observed similar issues in carbohydrate-amino acid
simulations and used the same methodology to correct carbohydrate-amino acid parameters. I showed that the modified parameters also worked well in
simulations of much larger systems, allowing realistic
simulations to be performed on polymeric sugars such as dextran and the peptidoglycan layer of the cell wall. In a more recent and separate study, I have attempted to parameterize very coarse-grained models of proteins (for eventual use in cellular scale
simulations) using experimental osmotic second virial coefficients. I found that a 10 residue-per-bead model including electrostatic interactions could approximately match most of the second virial coefficient data obtained from experiment. In contrast, a more simplified, spherical model of proteins could not adequately reproduce experiment. Although more work will be required to establish a better quantitative agreement with experiment, my results indicate that even very coarse models of proteins can produce reasonably accurate
simulations of protein-protein interactions.
Advisors/Committee Members: Elcock, Adrian H. (supervisor).
Subjects/Keywords: Computer Simulations; Molecular Dynamics; Biochemistry
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Manager
APA (6th Edition):
Lay, W. K. (2018). Optimizing computer simulation models for carbohydrates and proteins at the atomistic and coarse-grained level. (Doctoral Dissertation). University of Iowa. Retrieved from https://ir.uiowa.edu/etd/6603
Chicago Manual of Style (16th Edition):
Lay, Wesley K. “Optimizing computer simulation models for carbohydrates and proteins at the atomistic and coarse-grained level.” 2018. Doctoral Dissertation, University of Iowa. Accessed March 01, 2021.
https://ir.uiowa.edu/etd/6603.
MLA Handbook (7th Edition):
Lay, Wesley K. “Optimizing computer simulation models for carbohydrates and proteins at the atomistic and coarse-grained level.” 2018. Web. 01 Mar 2021.
Vancouver:
Lay WK. Optimizing computer simulation models for carbohydrates and proteins at the atomistic and coarse-grained level. [Internet] [Doctoral dissertation]. University of Iowa; 2018. [cited 2021 Mar 01].
Available from: https://ir.uiowa.edu/etd/6603.
Council of Science Editors:
Lay WK. Optimizing computer simulation models for carbohydrates and proteins at the atomistic and coarse-grained level. [Doctoral Dissertation]. University of Iowa; 2018. Available from: https://ir.uiowa.edu/etd/6603
University of Houston
24.
Khanal, Aaditya.
Effect of Reservoir and Completion Parameters on Production Performance in Gas Condensate Reservoirs.
Degree: MS, Chemical Engineering, 2014, University of Houston
URL: http://hdl.handle.net/10657/1416
► Production performance of gas condensate reservoirs with seven different fluid compositions was analyzed by a Modified Black Oil (MBO) model and was compared to a…
(more)
▼ Production performance of gas condensate reservoirs with seven different fluid compositions was analyzed by a Modified Black Oil (MBO) model and was compared to a compositional model. Reservoir simulation for the MBO and compositional cases was performed by using Kappa Rubis and CMG Gem respectively.
The effect of several reservoir properties on reservoir productivity was studied by performing sensitivity analyses on three rock/fluid properties and four completion parameters. The MBO approach was used with Kappa Rubis software.
Fracture half-length and porosity showed the most significant effect on production performance. Sensitivity studies also showed that there is significant increase in fracture interference when the fracture spacing is decreased below 253 ft. Increase in the number of wells per section showed a decrease in the production per well.
The results from MBO were comparable to the results from compositional model for cumulative gas production except for the samples with extreme values of condensate to gas ratio. However, there was large discrepancy between the results obtained from the MBO and compositional case for oil production from the gas condensate reservoirs.
This study shows the modified black oil approach, widely used in the petroleum industry, could give incorrect prediction for the production performance of gas condensate reservoirs. Compositional models are always preferable for rigorous studies but the MBO model could still be used with caution in absence of comprehensive lab data. This study shows that the oil and gas industry should prefer compositional simulation when studying gas condensate reservoirs.
Advisors/Committee Members: Lee, W. John (advisor), Nikolaou, Michael (committee member), Qin, Guan (committee member).
Subjects/Keywords: Gas Condensate; Simulations; CMG; Kappa
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APA (6th Edition):
Khanal, A. (2014). Effect of Reservoir and Completion Parameters on Production Performance in Gas Condensate Reservoirs. (Masters Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/1416
Chicago Manual of Style (16th Edition):
Khanal, Aaditya. “Effect of Reservoir and Completion Parameters on Production Performance in Gas Condensate Reservoirs.” 2014. Masters Thesis, University of Houston. Accessed March 01, 2021.
http://hdl.handle.net/10657/1416.
MLA Handbook (7th Edition):
Khanal, Aaditya. “Effect of Reservoir and Completion Parameters on Production Performance in Gas Condensate Reservoirs.” 2014. Web. 01 Mar 2021.
Vancouver:
Khanal A. Effect of Reservoir and Completion Parameters on Production Performance in Gas Condensate Reservoirs. [Internet] [Masters thesis]. University of Houston; 2014. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10657/1416.
Council of Science Editors:
Khanal A. Effect of Reservoir and Completion Parameters on Production Performance in Gas Condensate Reservoirs. [Masters Thesis]. University of Houston; 2014. Available from: http://hdl.handle.net/10657/1416
University of Houston
25.
-6149-7095.
Causes and Consequences of the Evolution of Mutation Rate.
Degree: PhD, Biology, 2016, University of Houston
URL: http://hdl.handle.net/10657/5400
► As the ultimate source of all genetic variation, mutation is required for evolution. The mutation rate measures the rate at which mutations occur over time.…
(more)
▼ As the ultimate source of all genetic variation, mutation is required for evolution. The mutation rate measures the rate at which mutations occur over time. How the mutation rate evolves and how it interacts with other evolutionary processes are still far from clearly understood. In this thesis, I employ individual-based
simulations and aim to understand how the evolution of mutation rate interacts with other evolutionary forces such as mutation biases, selection for evolvability, genetic drift and the evolution of recombination rate.
In Chapter 3, I studied the role of mutation bias (bias towards high mutation rate) in the evolution of mutation rate, which has been long ignored in the literature. I found that the effect of mutation bias on the evolution of mutation rate is significant when compared to that of other broadly promoted evolutionary forces such as natural selection, mutator hitchhiking, and genetic drift. Even in sexual populations, I found that mutation bias can still operate and drive the evolution of mutation rate. In Chapter 4, when the mutation rate (U) and recombination rate (R) are not allowed to evolve, I found that there exists an optimal mutation rate (Uopt), at which a population can achieve their maximal evolvability (E). Popula- tions displayed negative evolvability if U was above a critical value (Ucrit). Asexual and sexual populations showed similar relationships between E and U. Moreover, increasing R also increased E, Uopt, and Ucrit. In Chapter 5, I found that selection for evolvability cannot optimize U when it is allowed to evolve because U increased without bound — a phenomenon known as mutation rate catastrophe. In addition, the effect of mutation bias is much stronger than the selection for evolvability in sexual populations, indicating the selection for evolvability is not the only force that can affect the evolution of U and is a weak selection. However, U cannot be opti- mized when both forces are operating. Lastly, I found that selection can optimize the recombination rate for high evolvability. High R can prevent populations from experiencing the mutation rate catastrophe, although populations do not always evolve high R.
Advisors/Committee Members: Azevedo, Ricardo B. R. (advisor), Cooper, Timothy F. (committee member), Cole, Blaine J. (committee member), Josić, Krešimir (committee member), Balazsi, Gabor (committee member).
Subjects/Keywords: Evolution; Mutation rate; Mutations; Simulations
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APA (6th Edition):
-6149-7095. (2016). Causes and Consequences of the Evolution of Mutation Rate. (Doctoral Dissertation). University of Houston. Retrieved from http://hdl.handle.net/10657/5400
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
-6149-7095. “Causes and Consequences of the Evolution of Mutation Rate.” 2016. Doctoral Dissertation, University of Houston. Accessed March 01, 2021.
http://hdl.handle.net/10657/5400.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
-6149-7095. “Causes and Consequences of the Evolution of Mutation Rate.” 2016. Web. 01 Mar 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-6149-7095. Causes and Consequences of the Evolution of Mutation Rate. [Internet] [Doctoral dissertation]. University of Houston; 2016. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10657/5400.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
-6149-7095. Causes and Consequences of the Evolution of Mutation Rate. [Doctoral Dissertation]. University of Houston; 2016. Available from: http://hdl.handle.net/10657/5400
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
University of Debrecen
26.
ADERANTI, ISRAEL ADEOLA.
Application Of Free Chemical Simulator Softwares
.
Degree: DE – Természettudományi és Technológiai Kar – Kémiai Intézet, University of Debrecen
URL: http://hdl.handle.net/2437/276107
► Running of various chemical simulations using a free chemical simulator software (DWSIM) as well as on the (CHEMCAD)simulator software. I compared the advantages, benefits and…
(more)
▼ Running of various chemical
simulations using a free chemical simulator software (DWSIM) as well as on the (CHEMCAD)simulator software. I compared the advantages, benefits and disadvantages one had over the other. I studied the mode of operation, applicability of the DWSIM open source simulation software program in comparison with the CHEMCAD simulation programme which served as my thesis goal.
Advisors/Committee Members: Akos, Kuki (advisor).
Subjects/Keywords: Chemical Simulations
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APA (6th Edition):
ADERANTI, I. A. (n.d.). Application Of Free Chemical Simulator Softwares
. (Thesis). University of Debrecen. Retrieved from http://hdl.handle.net/2437/276107
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
ADERANTI, ISRAEL ADEOLA. “Application Of Free Chemical Simulator Softwares
.” Thesis, University of Debrecen. Accessed March 01, 2021.
http://hdl.handle.net/2437/276107.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
ADERANTI, ISRAEL ADEOLA. “Application Of Free Chemical Simulator Softwares
.” Web. 01 Mar 2021.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Vancouver:
ADERANTI IA. Application Of Free Chemical Simulator Softwares
. [Internet] [Thesis]. University of Debrecen; [cited 2021 Mar 01].
Available from: http://hdl.handle.net/2437/276107.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
Council of Science Editors:
ADERANTI IA. Application Of Free Chemical Simulator Softwares
. [Thesis]. University of Debrecen; Available from: http://hdl.handle.net/2437/276107
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
27.
Leone, Matthew Perry.
Understanding And Predicting Bagging Performance Through The Use Of CFD And DEM Simulations.
Degree: MS, Mechanical Engineering, 2015, University of North Dakota
URL: https://commons.und.edu/theses/1801
► This thesis will focus on rear discharge bagging performance for Rear Discharge Rear Collect (RDRC), Select Series Lawn & Garden tractors. The problem under…
(more)
▼ This thesis will focus on rear discharge bagging performance for Rear Discharge Rear Collect (RDRC), Select Series Lawn & Garden tractors. The problem under investigation pertains to adequately transporting cut grass from the mower deck to the dedicated hopper, without the plugging of the rear discharge chute or the deck mounted chute. The most problematic weather related factors are dew and rain, with the former being the most severe. Conditions creating this problem typically occur during the spring months and when the grass is at its healthiest state.
Field research and data have been collected to gain a better understanding of any and all factors involved as well as what factors can be controlled, what factors are uncontrollable, and what factors can be held constant. Computational Fluid Dynamics (CFD) and Discrete Element Method (DEM)
simulations have been conducted to aid in geometry factor identification, field data validation, and field performance predictions.
During this study, a path was identified that leveraged the airflow generated by the mower blades through the rear discharge and mower deck chutes, in moving cut grass from the mower deck to the hopper. Further development of the chutes airflow has aided in increased bagging performance and decreased plugging during tough mowing conditions. Consequently, a better understanding of the CFD and DEM models result in improvements to future model analyses.
Advisors/Committee Members: Marcellin Zahui.
Subjects/Keywords: CFD; DEM; Simulations; Tractors
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APA (6th Edition):
Leone, M. P. (2015). Understanding And Predicting Bagging Performance Through The Use Of CFD And DEM Simulations. (Masters Thesis). University of North Dakota. Retrieved from https://commons.und.edu/theses/1801
Chicago Manual of Style (16th Edition):
Leone, Matthew Perry. “Understanding And Predicting Bagging Performance Through The Use Of CFD And DEM Simulations.” 2015. Masters Thesis, University of North Dakota. Accessed March 01, 2021.
https://commons.und.edu/theses/1801.
MLA Handbook (7th Edition):
Leone, Matthew Perry. “Understanding And Predicting Bagging Performance Through The Use Of CFD And DEM Simulations.” 2015. Web. 01 Mar 2021.
Vancouver:
Leone MP. Understanding And Predicting Bagging Performance Through The Use Of CFD And DEM Simulations. [Internet] [Masters thesis]. University of North Dakota; 2015. [cited 2021 Mar 01].
Available from: https://commons.und.edu/theses/1801.
Council of Science Editors:
Leone MP. Understanding And Predicting Bagging Performance Through The Use Of CFD And DEM Simulations. [Masters Thesis]. University of North Dakota; 2015. Available from: https://commons.und.edu/theses/1801
University of Illinois – Chicago
28.
Sharma, Priyanka O.
Simulated Permeation of Nanoparticles with Size, Shape, and Functional Diversity Through a Model Membrane.
Degree: 2016, University of Illinois – Chicago
URL: http://hdl.handle.net/10027/21524
► Molecular dynamics simulations are particularly useful in providing details that permit understanding of phenomena occurring at surfaces, phenomena characterized by surface-sensitive experimental methods yielding average…
(more)
▼ Molecular dynamics
simulations are particularly useful in providing details that permit understanding of phenomena occurring at surfaces, phenomena characterized by surface-sensitive experimental methods yielding average properties. The coarse-grained simulation approach methods that we consider here reveal how the characteristics of the surface and the permeant affect penetration events at the surface of phospholipid bilayer membranes. We use molecular dynamics
simulations to investigate permeation of lipid bilayer membranes by surface-functionalized nanoparticles and to provide molecular-level detailed mechanisms that are otherwise not readily available via most experimental means. Permeation of small molecules through lipid bilayer membranes is a fundamental biological process that is important to understand in developing therapeutic applications. Nanoparticles have recently become important carriers for drug delivery in such therapeutic applications. We describe coarse-grained simulation methods applicable to such large systems and use examples where the permeants are bare gold nanocrystals, gold-core nanoparticles with hydrophobic ligands (alkanethiol ligands of various lengths), and gold-core nanoparticles with hydrophilic ligands (methyl-terminated polyethylene glycol ligands of various lengths). In addition to spherical gold nanoparticles, we also examine the characteristic permeation mechanisms of the differently shaped gold nanorods with polyethylene glycol ligands, where the aspect ratio different from 1 makes the permeation event dependent on the angle of the nanorod axis relative to the membrane surface. This thesis examines the phenomena associated with the interaction of these various permeants with the phospholipid bilayer that serves as our model membrane. We consider adsorption at the interface, the permeant within the top lipid leaflet, in the middle of the membrane within the lipid tail region, and finally exiting the membrane on the way to recovery, for the various permeants. As a consequence of nanocarrier permeation, we observe the formation of a water pore, occasional transport of ions across the lipid bilayer, lipid translocation, and lipid displacement from the membrane. We investigate the rotational behavior of PEGylated nanorods during the permeation process and the available pathways for these nanorods in completing the permeation. These events differ depending on the chemical nature (hydrophobic or hydrophilic) of the ligands, their length, the surface coverage density on the gold surface, and the aspect ratio of the gold nanocarrier core. This thesis, which highlights comparisons of permeation of nanoparticles with size, shape, and functional diversity, should aid experimentalists who are designing desirable candidates for drug delivery applications.
Advisors/Committee Members: Murad, Sohail (advisor), Chaplin, Brian (committee member), Jameson, Cynthia (committee member), Nitsche, Ludwig (committee member), Sharma, Vivek (committee member), Murad, Sohail (chair).
Subjects/Keywords: Drug delivery; molecular dynamics simulations
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APA (6th Edition):
Sharma, P. O. (2016). Simulated Permeation of Nanoparticles with Size, Shape, and Functional Diversity Through a Model Membrane. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/21524
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sharma, Priyanka O. “Simulated Permeation of Nanoparticles with Size, Shape, and Functional Diversity Through a Model Membrane.” 2016. Thesis, University of Illinois – Chicago. Accessed March 01, 2021.
http://hdl.handle.net/10027/21524.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sharma, Priyanka O. “Simulated Permeation of Nanoparticles with Size, Shape, and Functional Diversity Through a Model Membrane.” 2016. Web. 01 Mar 2021.
Vancouver:
Sharma PO. Simulated Permeation of Nanoparticles with Size, Shape, and Functional Diversity Through a Model Membrane. [Internet] [Thesis]. University of Illinois – Chicago; 2016. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10027/21524.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sharma PO. Simulated Permeation of Nanoparticles with Size, Shape, and Functional Diversity Through a Model Membrane. [Thesis]. University of Illinois – Chicago; 2016. Available from: http://hdl.handle.net/10027/21524
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Chicago
29.
Siriaksorn, Thanakorn.
Meshfree Methods for Geotechnical Disaster Simulation and Prediction.
Degree: 2016, University of Illinois – Chicago
URL: http://hdl.handle.net/10027/21622
► This thesis presents meshfree frameworks based on the semi-Lagrangian Reproducing Kernel (RK) approximation to effectively handle extreme geotechnical events within one mathematical framework. The semi-Lagrangian…
(more)
▼ This thesis presents meshfree frameworks based on the semi-Lagrangian Reproducing Kernel (RK) approximation to effectively handle extreme geotechnical events within one mathematical framework. The semi-Lagrangian RK approximation combines advantages of the Eulerian and Lagrangian formulations, that is, state variables follow material points while the approximation function is updated in the current configuration to allow extreme deformation and material separation. The approximation is extended to the u-p (displacement-pressure) formulation based on Biot's theory for considering poromechanics of geomaterials. Drucker-Prager plasticity with a single-parameter damage model is also employed to properly represent the behavior of the solid phase of geomaterials. Additionally, variationally consistent stabilized nodal integration schemes and kernel contact algorithms are introduced in the u-p semi-Lagrangian RK framework to enhance accuracy and stability of solutions using the Galerkin formulation and to naturally model arbitrary contacts. Detailed studies of the temporal stability of the frameworks are performed using the von Neumann method to provide a guideline of time step selection when explicit time integration schemes are adopted. The robustness and effectiveness of the proposed u-p semi-Lagrangian RK formulation is verified with FEM solutions in several slope stability analyses. The run-out simulation capability of the presented method is also validated with experimental data and actual data from a landslide site. The proposed framework can be applied to study other geotechnical events under extreme conditions, which is demonstrated in simulating the penetration process of a projectile penetrating into the soil.
Additionally, the strong form collocation method with the RK approximation is introduced to study the poromechanics of geomaterials, as an alternative approach. The governing equations are directly solved in the strong formulation with the point collocation method, in which the domain integration is not required in contrast to the Galerkin weak formulation. The effectiveness of the method is studied and demonstrated in hyperelasticity, elastodynamics, and poroelasticity problems.
Advisors/Committee Members: Chi, Sheng-Wei (advisor), Foster, Craig D. (committee member), Ozevin, Didem (committee member), Karpov, Eduard (committee member), Shabana, Ahmed (committee member), Chi, Sheng-Wei (chair).
Subjects/Keywords: meshfree methods; landslide simulations
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Siriaksorn, T. (2016). Meshfree Methods for Geotechnical Disaster Simulation and Prediction. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/21622
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Siriaksorn, Thanakorn. “Meshfree Methods for Geotechnical Disaster Simulation and Prediction.” 2016. Thesis, University of Illinois – Chicago. Accessed March 01, 2021.
http://hdl.handle.net/10027/21622.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Siriaksorn, Thanakorn. “Meshfree Methods for Geotechnical Disaster Simulation and Prediction.” 2016. Web. 01 Mar 2021.
Vancouver:
Siriaksorn T. Meshfree Methods for Geotechnical Disaster Simulation and Prediction. [Internet] [Thesis]. University of Illinois – Chicago; 2016. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10027/21622.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Siriaksorn T. Meshfree Methods for Geotechnical Disaster Simulation and Prediction. [Thesis]. University of Illinois – Chicago; 2016. Available from: http://hdl.handle.net/10027/21622
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Robert Gordon University
30.
Doonga, Nitin.
The development and implementation of business simulations in higher education in the United Kingdom.
Degree: PhD, 2013, Robert Gordon University
URL: http://hdl.handle.net/10059/946
► This thesis is a study of the development and implementation of business simulations/games in United Kingdom Higher Education institutions. The research takes an holistic approach…
(more)
▼ This thesis is a study of the development and implementation of business simulations/games in United Kingdom Higher Education institutions. The research takes an holistic approach and examines the topic from the perspective of developers of business simulations, academics who choose to implement simulations in their teaching, and students who are the end users of business simulations. The research is based on an empirical instructivist research paradigm and takes an holistic approach to consideration of the key issues in design, development and use of business simulations/games from the perspective of developers, academics, and learners. The research takes a pragmatic approach to the application of research methods. It relies mainly on the use of qualitative methods to examine in detail the perceptions of learners. A typology of business simulation/games was established and a set of six educational objectives associated with use of business simulations was derived from a study of the literature. Surveys of developers and academics were conducted in order to determine the extent to which both groups shared a common perception of key features which should be exhibited by a business simulation and the pedagogical objectives which business simulations could support. A wide range of literature in the field of educational technology was analysed to determine the manner in which business simulations supported current views on pedagogic theories and also models of learning. The manner in which the pedagogical objectives of simulations were evaluated was then considered and, through a critical review of the literature, a framework for evaluation of business simulations was developed. The framework for evaluation was used in a case study evaluation of Masters students at the Robert Gordon University, the United Kingdom. The evaluation drew on illuminative and integrative evaluation approaches. Drawing on the literature and the findings of the surveys of academics and developers the evaluation explored the key question of whether or not the use of the business simulation achieved the pedagogical objectives which it was intended to achieve, examined the process by which students learn using a business simulation, and did this in the authentic context in which the business simulation was used. The results of the literature analysis and empirical surveys were used to summarize the critical success factors in developing and implementing business simulations in the Higher Education curriculum in the UK. Issues which arose as barriers to adoption of the use of business simulation were explored and recommendations on how to address the key barriers associated with adoption of business simulations are discussed.
Subjects/Keywords: 020; Business games/simulations; Business simulations; Evaluation; Business simulations market; Business simulations use; Illumimative evaluation; Educational technology
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APA ·
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MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Doonga, N. (2013). The development and implementation of business simulations in higher education in the United Kingdom. (Doctoral Dissertation). Robert Gordon University. Retrieved from http://hdl.handle.net/10059/946
Chicago Manual of Style (16th Edition):
Doonga, Nitin. “The development and implementation of business simulations in higher education in the United Kingdom.” 2013. Doctoral Dissertation, Robert Gordon University. Accessed March 01, 2021.
http://hdl.handle.net/10059/946.
MLA Handbook (7th Edition):
Doonga, Nitin. “The development and implementation of business simulations in higher education in the United Kingdom.” 2013. Web. 01 Mar 2021.
Vancouver:
Doonga N. The development and implementation of business simulations in higher education in the United Kingdom. [Internet] [Doctoral dissertation]. Robert Gordon University; 2013. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10059/946.
Council of Science Editors:
Doonga N. The development and implementation of business simulations in higher education in the United Kingdom. [Doctoral Dissertation]. Robert Gordon University; 2013. Available from: http://hdl.handle.net/10059/946
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Open Access Theses and Dissertations