You searched for subject:( Percolation).
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1.
Khebbab, Mohamed.
Contribution à l'étude du CND par Courants de Foucault de matériaux hétérogènes faiblement conducteurs à base d'éléments finis : Contribution to the study of eddy current NDT of heterogeneous weakly conductive materials by the use of finite element.
Degree: Docteur es, Electronique et génie électrique, 2016, Nantes; Université Mentouri-Constantine. Faculté des sciences
URL: http://www.theses.fr/2016NANT4056 
► Le travail de cette thèse consiste en l’investigation de techniques de caractérisation et de contrôle électromagnétique de pièces en matériaux composites, en particulier les composites…
(more)
▼ Le travail de cette thèse consiste en l’investigation de techniques de caractérisation et de contrôle électromagnétique de pièces en matériaux composites, en particulier les composites unidirectionnels à fibres de carbone (CFRP : Carbon Fibers Reinforced Polymer). Deux modèles sont alors développés. Le premier modèle qui est destiné à la caractérisation de la conductivité électrique transverse du CFRP est basé sur la percolation par réseau de résistances. Les grandeurs physiques de ce réseau sont établies à partir d’approches stochastiques (chaînes de Markov). Outre la prédiction de la conductivité électrique transverse du composite, le modèle permet d’appréhender les principaux paramètres qui influencent la conductivité. Le deuxième modèle traite du contrôle non destructif par courants de Foucault de ces matériaux en adoptant une approche de résolutions parallèle des problèmes micro et macro par la méthode dite d’éléments finis hétérogènes multi échelles (FE-HMM).Ce modèle est relativement plus précis que l’approche classique qui se base sur les techniques d’homogénéisation, ce qui permet notamment de caractériser des défauts microscopiques.
The work of this thesis consists in the investigation of characterization techniques and electromagnetic testing of composite materials, particularly the unidirectional CFRP ones (Carbon Fibers Reinforced Polymer). Two models are then developed. The first model that is intended for the characterization of the transverse electric conductivity of CFRP is based on percolation through resistor network. The physical parameters of the network make use of stochastic approaches (Markov chains). Besides predicting the transverse electrical conductivity of the material, the model allows us to understand the main parameters that influence the conductivity. The second model deals with the eddy current non-destructive testing of these materials by adopting an approach of parallel resolutions of micro and macro problems using the finite element heterogeneous multiscale method (FE-HMM). This model is relatively more accurate than the classical approach based on the homogenization techniques, and notably allows to characterize microscopic defects
Advisors/Committee Members: Feliachi, Mouloud (thesis director), Latreche, Mohamed (thesis director).
Subjects/Keywords: Percolation
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APA (6th Edition):
Khebbab, M. (2016). Contribution à l'étude du CND par Courants de Foucault de matériaux hétérogènes faiblement conducteurs à base d'éléments finis : Contribution to the study of eddy current NDT of heterogeneous weakly conductive materials by the use of finite element. (Doctoral Dissertation). Nantes; Université Mentouri-Constantine. Faculté des sciences. Retrieved from http://www.theses.fr/2016NANT4056
Chicago Manual of Style (16th Edition):
Khebbab, Mohamed. “Contribution à l'étude du CND par Courants de Foucault de matériaux hétérogènes faiblement conducteurs à base d'éléments finis : Contribution to the study of eddy current NDT of heterogeneous weakly conductive materials by the use of finite element.” 2016. Doctoral Dissertation, Nantes; Université Mentouri-Constantine. Faculté des sciences. Accessed January 15, 2021.
http://www.theses.fr/2016NANT4056.
MLA Handbook (7th Edition):
Khebbab, Mohamed. “Contribution à l'étude du CND par Courants de Foucault de matériaux hétérogènes faiblement conducteurs à base d'éléments finis : Contribution to the study of eddy current NDT of heterogeneous weakly conductive materials by the use of finite element.” 2016. Web. 15 Jan 2021.
Vancouver:
Khebbab M. Contribution à l'étude du CND par Courants de Foucault de matériaux hétérogènes faiblement conducteurs à base d'éléments finis : Contribution to the study of eddy current NDT of heterogeneous weakly conductive materials by the use of finite element. [Internet] [Doctoral dissertation]. Nantes; Université Mentouri-Constantine. Faculté des sciences; 2016. [cited 2021 Jan 15].
Available from: http://www.theses.fr/2016NANT4056.
Council of Science Editors:
Khebbab M. Contribution à l'étude du CND par Courants de Foucault de matériaux hétérogènes faiblement conducteurs à base d'éléments finis : Contribution to the study of eddy current NDT of heterogeneous weakly conductive materials by the use of finite element. [Doctoral Dissertation]. Nantes; Université Mentouri-Constantine. Faculté des sciences; 2016. Available from: http://www.theses.fr/2016NANT4056
2.
Senghor, Fiacre Djonkone.
Identification des propriétés anisotropes des matériaux complexes : application aux matériaux composites stratifiés : Identification of anisotropic properties of complex materials : application to stratified composites.
Degree: Docteur es, Génie électrique, 2017, Nantes
URL: http://www.theses.fr/2017NANT4002
► Les travaux présentés dans cette thèse portent sur l’identification des propriétés électriques anisotropes de matériaux composites complexes. Ils visent à contribuer à une meilleure maîtrise…
(more)
▼ Les travaux présentés dans cette thèse portent sur l’identification des propriétés électriques anisotropes de matériaux composites complexes. Ils visent à contribuer à une meilleure maîtrise de l’impact des paramètres des procédés de fabrications des différentes architectures, des formulations et du pourcentage de renforts, etc., sur le comportement électrique de ces composites. Ils s’inscrivent dans le cadre du projet de recherche FUI ACCEA (Amélioration des Conductivités des Composites pour Équipements Aéronautiques) financé en partie par la région Pays de la Loire. Ce projet a pour but de concevoir un matériau composite multi-fonctionnel d’un nouveau genre à matrice thermoplastique chargée en graphite de carbone qui verrait ses propriétés électriques et thermiques améliorées sans dégrader ses propriétés mécaniques. Dès lors l’une des principales difficultés du concepteur est donc de trouver des outils innovants de mise en oeuvre, pour améliorer les propriétés thermique et électrique de ces composites de manière non intrusive et nondestructive pour leurs propriétés mécaniques avec un moindre coût. C’est dans cette logique que nous proposons dans ce travail de thèse, une approche modélisation et une approche de mesure expérimentale du tenseur de conductivité électrique de ses composites, afin de fournir un outil d’aide à la décision sur le choix de la matrice, de l’armure, du procédé de mise en oeuvre, etc. Une confrontation entre les résultats de simulations et les mesures expérimentales a permis de valider le modèle développé.
The works presented in this thesis focuses on the identification of anisotropic electrical properties of complex composite materials. They aim to contribute to a better control of the impact of manufacturing process parameters, different architectures, formulations and fibres filling rate, etc., on the electrical behaviour of these composite materials. They inscribe themselves in the frame of the FUI ACCEA research project funded in part by the region Pays de la Loire. This project aims to produce a multi-functional composite material of a new type of thermoplastic matrix loaded with carbon graphite which would see its electrical and thermal properties improved without degrading the mechanical properties. From then one of the main difficulties of the designer is to find innovative implementation tools, to improve the thermal and electrical properties of these composites non-intrusive and non-destructive to their mechanical properties with less cost. It is in this logic that this PhD work is interested in modelling and experimental measurement of the electrical conductivity tensor of this composites to provide an help to the decision on the choice of matrix, of the weave, the implemented method, etc. The comparison between the simulation and experimental results gives a good concordance.
Advisors/Committee Members: Trichet, Didier (thesis director), Berthiau, Gérard (thesis director), Wasselynck, Guillaume (thesis director).
Subjects/Keywords: Percolation
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APA (6th Edition):
Senghor, F. D. (2017). Identification des propriétés anisotropes des matériaux complexes : application aux matériaux composites stratifiés : Identification of anisotropic properties of complex materials : application to stratified composites. (Doctoral Dissertation). Nantes. Retrieved from http://www.theses.fr/2017NANT4002
Chicago Manual of Style (16th Edition):
Senghor, Fiacre Djonkone. “Identification des propriétés anisotropes des matériaux complexes : application aux matériaux composites stratifiés : Identification of anisotropic properties of complex materials : application to stratified composites.” 2017. Doctoral Dissertation, Nantes. Accessed January 15, 2021.
http://www.theses.fr/2017NANT4002.
MLA Handbook (7th Edition):
Senghor, Fiacre Djonkone. “Identification des propriétés anisotropes des matériaux complexes : application aux matériaux composites stratifiés : Identification of anisotropic properties of complex materials : application to stratified composites.” 2017. Web. 15 Jan 2021.
Vancouver:
Senghor FD. Identification des propriétés anisotropes des matériaux complexes : application aux matériaux composites stratifiés : Identification of anisotropic properties of complex materials : application to stratified composites. [Internet] [Doctoral dissertation]. Nantes; 2017. [cited 2021 Jan 15].
Available from: http://www.theses.fr/2017NANT4002.
Council of Science Editors:
Senghor FD. Identification des propriétés anisotropes des matériaux complexes : application aux matériaux composites stratifiés : Identification of anisotropic properties of complex materials : application to stratified composites. [Doctoral Dissertation]. Nantes; 2017. Available from: http://www.theses.fr/2017NANT4002
Georgia Tech
3.
Xu, Chen.
Topics in percolation and sequence analysis.
Degree: PhD, Mathematics, 2018, Georgia Tech
URL: http://hdl.handle.net/1853/60260
► This thesis studies three topics, two in percolation system and one in sequence analysis. In the first part, we prove that, for directed Bernoulli last…
(more)
▼ This thesis studies three topics, two in
percolation system and one in sequence analysis. In the first part, we prove that, for directed Bernoulli last passage
percolation with i.i.d.~weights on vertices over a n × n grid and for n large enough, the geodesics are shown to be concentrated in a cylinder, centered on the main diagonal and of width of order n
(2κ+2)/(2κ+3)√{\ln n}, where 1 ≤ κ<∞ is the curvature power-index of the shape function at (1,1). The methodology of proof is robust enough to also apply to directed Bernoulli first passage site
percolation, and further to longest common subsequences in random words. In the second part, we prove that, in directed last passage site
percolation over a n × \lfloor n
α\rfloor-grid and for i.i.d.~random weights having finite support, the order of the r-th central moment, 1 ≤ r<+∞, of the last passage time is, for n large enough,
lower bounded by n
r(1-α)/2, 0<α<1/3. In the last part, we address a question and a conjecture on the expected length of the longest common subsequences of two i.i.d. random permutations of [n]:={1,2,...,n}. The question is resolved by showing that the minimal expectation is not attained in the uniform case. The conjecture asserts that √{n} is a lower bound on
this expectation, but we only obtain √[3]{n} for it.
Advisors/Committee Members: Damron, Michael (committee member), Hanson, Jack (committee member), Brito, Gerandy (committee member).
Subjects/Keywords: Percolation; Sequence
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APA (6th Edition):
Xu, C. (2018). Topics in percolation and sequence analysis. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/60260
Chicago Manual of Style (16th Edition):
Xu, Chen. “Topics in percolation and sequence analysis.” 2018. Doctoral Dissertation, Georgia Tech. Accessed January 15, 2021.
http://hdl.handle.net/1853/60260.
MLA Handbook (7th Edition):
Xu, Chen. “Topics in percolation and sequence analysis.” 2018. Web. 15 Jan 2021.
Vancouver:
Xu C. Topics in percolation and sequence analysis. [Internet] [Doctoral dissertation]. Georgia Tech; 2018. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/1853/60260.
Council of Science Editors:
Xu C. Topics in percolation and sequence analysis. [Doctoral Dissertation]. Georgia Tech; 2018. Available from: http://hdl.handle.net/1853/60260
Texas A&M University
4.
Chapman, Ian.
Determination of the Controls on Permeability and Transport in Shale by Use of Percolation Models.
Degree: MS, Petroleum Engineering, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11668
► A proper understanding of reservoir connectivity is essential to understanding the relationship between the porosity and the permeability within it. Additionally, the construction of an…
(more)
▼ A proper understanding of reservoir connectivity is essential to understanding the relationship between the porosity and the permeability within it. Additionally, the construction of an accurate reservoir model cannot be accomplished without this information. While a great deal is known about the connectivity in conventional sandstone systems, little is understood about the connectivity and its resultant properties within shale systems.
Percolation theory is a method to describe the global properties of the shale system by understanding the nanometer scale interaction of pore space.
In this study we use both analytical and empirical techniques to further understand shale pore scale interactions as well as global phenomena of the shale system. Construction of pore scale connectivity simulations on lattice and in the continuum allow for understanding relationships between pore topology, system porosity and system permeability. Additionally, questions regarding the role of Total Organic Carbon as well as natural fractures in contributing to shale permeability will be discussed. Analytical techniques are used to validate simulation results regarding the onset of
percolation and related pore topology. Finally, time of flight simulation is used to further understand pressure transient behavior in the resulting topological models.
High aspect ratio pores are shown to be the driver of shale permeability as opposed to the low aspect ratio pore space associated with organic matrix. Additionally, systems below the
percolation threshold are likely able to produce because the wellbore will often encounter near infinite clusters. Finally, a characteristic volume growth profile is shown for a multi-porosity system whereby each level of porosity displays a corresponding stair step of volume growth in time.
Advisors/Committee Members: King, Michael (advisor), Valko, Peter (committee member), Sun, Yuefeng (committee member).
Subjects/Keywords: Percolation; Shale; Permeability
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APA (6th Edition):
Chapman, I. (2012). Determination of the Controls on Permeability and Transport in Shale by Use of Percolation Models. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11668
Chicago Manual of Style (16th Edition):
Chapman, Ian. “Determination of the Controls on Permeability and Transport in Shale by Use of Percolation Models.” 2012. Masters Thesis, Texas A&M University. Accessed January 15, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11668.
MLA Handbook (7th Edition):
Chapman, Ian. “Determination of the Controls on Permeability and Transport in Shale by Use of Percolation Models.” 2012. Web. 15 Jan 2021.
Vancouver:
Chapman I. Determination of the Controls on Permeability and Transport in Shale by Use of Percolation Models. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11668.
Council of Science Editors:
Chapman I. Determination of the Controls on Permeability and Transport in Shale by Use of Percolation Models. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11668
5.
Zhou, Wei.
Un nouveau regard sur les interfaces dans les modèles de percolation et d'Ising : A new look at the interfaces in the percolation and Ising models.
Degree: Docteur es, Mathématiques fondamentales, 2019, Université Paris-Saclay (ComUE)
URL: http://www.theses.fr/2019SACLS173
► Les interfaces dans les modèles de percolation et d'Ising jouent un rôle crucial dans la compréhension de ces modèles et sont au coeur de plusieurs…
(more)
▼ Les interfaces dans les modèles de percolation et d'Ising jouent un rôle crucial dans la compréhension de ces modèles et sont au coeur de plusieurs problématiques : la construction de Wulff, le mouvement par courbure moyenne, la théorie du SLE. Dans son célèbre article de 1972, Roland Dobrushin a montré que le modèle d'Ising en dimension d ≥ 3 admet une mesure de Gibbs qui n'est pas invariante par translation à l'aide d'une étude sur l'interface entre le haut et le bas d'une boîte droite de taille finie. Le cas d'une boîte penchée est très différent et plus difficile à analyser. Nous proposons dans cette thèse une nouvelle définition de l'interface. Cette définition est construite dans le modèle de percolation Bernoulli à l'aide d'un couplage dynamique de deux configurations. Nous montrons que cette interface est localisée autour des arêtes pivot à une distance d'ordre de ln²n dans une boîte de taille n. Notre méthode de preuve utilise les chemins espace-temps, qui permettent de contrôler la vitesse de déplacement de l'interface. Nous montrons aussi que la vitesse des arêtes pivot est au plus de l’ordre de ln n. Nous étendons ces résultats au modèle de FK-percolation, nous montrons aussi la localisation de l'interface à distance d'ordre ln²n autour des arêtes pivot. En utilisant une modification du couplage classique d'Edwards-Sokal, nous obtenons des résultats analogues sur la localisation de l'interface dans le modèle d'Ising.
The interfaces in the percolation and Ising models play an important role in the understanding of these models and are at the heart of several problematics: the Wulff construction, the mean curvature motion and the SLE theory. In his famous 1972 paper, Roland Dobrushin showed that the Ising model in dimensions d ≥ 3 has a Gibbs measure which is not invariant by translation by studying the interface between the top and the bottom of a straight finite box. The case of a tilted box is very different and more difficult to analyse. In this thesis, we propose a new definition of the interface. This definition is constructed in the Bernoulli percolation model with the help of a dynamical coupling between two configurations. We show that this interface is localized around the pivotal edges within a distance of order ln²n inside a box of size n. The proof relies on space-time paths which allow us to control the speed of the interface. We also show that the speed of the pivotal edges is at most of order ln n. We extend these results to the FK-percolation model, we also show the localization of the interface at distance of order ln²n around the pivotal edges. Using a modification of the classical Edwards-Sokal coupling, we obtain analogous results on the localization of the interface in the Ising model.
Advisors/Committee Members: Cerf, Raphaël (thesis director).
Subjects/Keywords: Interface; Localisation; Percolation; FK-percolation; Modèle d'Ising; Interface; Localization; Percolation; FK-percolation; Ising model
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APA ·
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APA (6th Edition):
Zhou, W. (2019). Un nouveau regard sur les interfaces dans les modèles de percolation et d'Ising : A new look at the interfaces in the percolation and Ising models. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2019SACLS173
Chicago Manual of Style (16th Edition):
Zhou, Wei. “Un nouveau regard sur les interfaces dans les modèles de percolation et d'Ising : A new look at the interfaces in the percolation and Ising models.” 2019. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed January 15, 2021.
http://www.theses.fr/2019SACLS173.
MLA Handbook (7th Edition):
Zhou, Wei. “Un nouveau regard sur les interfaces dans les modèles de percolation et d'Ising : A new look at the interfaces in the percolation and Ising models.” 2019. Web. 15 Jan 2021.
Vancouver:
Zhou W. Un nouveau regard sur les interfaces dans les modèles de percolation et d'Ising : A new look at the interfaces in the percolation and Ising models. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2019. [cited 2021 Jan 15].
Available from: http://www.theses.fr/2019SACLS173.
Council of Science Editors:
Zhou W. Un nouveau regard sur les interfaces dans les modèles de percolation et d'Ising : A new look at the interfaces in the percolation and Ising models. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2019. Available from: http://www.theses.fr/2019SACLS173
Georgia Tech
6.
Li, Jiaheng.
Numerical estimates for arm exponents and the acceptance profile in two-dimensional invasion percolation.
Degree: MS, Mathematics, 2020, Georgia Tech
URL: http://hdl.handle.net/1853/62823
► The main object of this thesis is to numerically estimate some conjectured arm exponents when there exist a number of open paths and closed dual…
(more)
▼ The main object of this thesis is to numerically estimate some conjectured arm exponents when there exist a number of open paths and closed dual paths that extend to the boundary of different sizes of boxes centering at the origin in bond invasion
percolation on a plane square lattice by Monte-Carlo simulations. The results turn out to be supportive of the conjectured value in some case. The numerical estimate for the acceptance profile of invasion
percolation at the critical point is also obtained, which suggests a neighborhood in which the liminf and limsup of the acceptance profile might fall. An efficient algorithm to simulate invasion
percolation and to find disjoint paths on most regular 2-dimensional lattices are discussed.
Advisors/Committee Members: Damron, Michael (advisor), Houdré, Christian (advisor), Tikhomirov, Konstantin (advisor).
Subjects/Keywords: Percolation; Critical percolation; Invasion percolation; Ford-Fulkerson algorithm; Regression
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APA (6th Edition):
Li, J. (2020). Numerical estimates for arm exponents and the acceptance profile in two-dimensional invasion percolation. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/62823
Chicago Manual of Style (16th Edition):
Li, Jiaheng. “Numerical estimates for arm exponents and the acceptance profile in two-dimensional invasion percolation.” 2020. Masters Thesis, Georgia Tech. Accessed January 15, 2021.
http://hdl.handle.net/1853/62823.
MLA Handbook (7th Edition):
Li, Jiaheng. “Numerical estimates for arm exponents and the acceptance profile in two-dimensional invasion percolation.” 2020. Web. 15 Jan 2021.
Vancouver:
Li J. Numerical estimates for arm exponents and the acceptance profile in two-dimensional invasion percolation. [Internet] [Masters thesis]. Georgia Tech; 2020. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/1853/62823.
Council of Science Editors:
Li J. Numerical estimates for arm exponents and the acceptance profile in two-dimensional invasion percolation. [Masters Thesis]. Georgia Tech; 2020. Available from: http://hdl.handle.net/1853/62823
Oregon State University
7.
Abd El-Samie, Ahmed Gamal.
Laboratory investigations of factors affecting permeability of some Owyhee project soils.
Degree: MS, Soils, 1949, Oregon State University
URL: http://hdl.handle.net/1957/53177
Subjects/Keywords: Soil percolation
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APA (6th Edition):
Abd El-Samie, A. G. (1949). Laboratory investigations of factors affecting permeability of some Owyhee project soils. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/53177
Chicago Manual of Style (16th Edition):
Abd El-Samie, Ahmed Gamal. “Laboratory investigations of factors affecting permeability of some Owyhee project soils.” 1949. Masters Thesis, Oregon State University. Accessed January 15, 2021.
http://hdl.handle.net/1957/53177.
MLA Handbook (7th Edition):
Abd El-Samie, Ahmed Gamal. “Laboratory investigations of factors affecting permeability of some Owyhee project soils.” 1949. Web. 15 Jan 2021.
Vancouver:
Abd El-Samie AG. Laboratory investigations of factors affecting permeability of some Owyhee project soils. [Internet] [Masters thesis]. Oregon State University; 1949. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/1957/53177.
Council of Science Editors:
Abd El-Samie AG. Laboratory investigations of factors affecting permeability of some Owyhee project soils. [Masters Thesis]. Oregon State University; 1949. Available from: http://hdl.handle.net/1957/53177
Oregon State University
8.
Young, Vilas Devald, 1898-.
Improvement in percolation of water thru soils having a high clay content and restricted drainage.
Degree: MS, Soils, 1925, Oregon State University
URL: http://hdl.handle.net/1957/50714
Subjects/Keywords: Soil percolation
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APA (6th Edition):
Young, Vilas Devald, 1. (1925). Improvement in percolation of water thru soils having a high clay content and restricted drainage. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/50714
Chicago Manual of Style (16th Edition):
Young, Vilas Devald, 1898-. “Improvement in percolation of water thru soils having a high clay content and restricted drainage.” 1925. Masters Thesis, Oregon State University. Accessed January 15, 2021.
http://hdl.handle.net/1957/50714.
MLA Handbook (7th Edition):
Young, Vilas Devald, 1898-. “Improvement in percolation of water thru soils having a high clay content and restricted drainage.” 1925. Web. 15 Jan 2021.
Vancouver:
Young, Vilas Devald 1. Improvement in percolation of water thru soils having a high clay content and restricted drainage. [Internet] [Masters thesis]. Oregon State University; 1925. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/1957/50714.
Council of Science Editors:
Young, Vilas Devald 1. Improvement in percolation of water thru soils having a high clay content and restricted drainage. [Masters Thesis]. Oregon State University; 1925. Available from: http://hdl.handle.net/1957/50714
Oregon State University
9.
Higby, William Morgan.
Removal of plant nutrients in percolate from lysimeter tanks.
Degree: MS, Soils, 1926, Oregon State University
URL: http://hdl.handle.net/1957/50806
Subjects/Keywords: Soil percolation
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APA (6th Edition):
Higby, W. M. (1926). Removal of plant nutrients in percolate from lysimeter tanks. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/50806
Chicago Manual of Style (16th Edition):
Higby, William Morgan. “Removal of plant nutrients in percolate from lysimeter tanks.” 1926. Masters Thesis, Oregon State University. Accessed January 15, 2021.
http://hdl.handle.net/1957/50806.
MLA Handbook (7th Edition):
Higby, William Morgan. “Removal of plant nutrients in percolate from lysimeter tanks.” 1926. Web. 15 Jan 2021.
Vancouver:
Higby WM. Removal of plant nutrients in percolate from lysimeter tanks. [Internet] [Masters thesis]. Oregon State University; 1926. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/1957/50806.
Council of Science Editors:
Higby WM. Removal of plant nutrients in percolate from lysimeter tanks. [Masters Thesis]. Oregon State University; 1926. Available from: http://hdl.handle.net/1957/50806
University of Tasmania
10.
Foster, Denistoun Henry.
The dilute acid hydrolysis of Tasmanian woods in percolation apparatus.
Degree: 1947, University of Tasmania
URL: https://eprints.utas.edu.au/19971/1/whole_FosterDenistounHenry1947_thesis.pdf
► Investigations in the field of wood hydrolysis at the University of Tasmania were planned in a general way by Professor E. E. Kurth in 1940-41…
(more)
▼ Investigations in the field of wood hydrolysis at the University of Tasmania were planned in a general way by Professor E. E. Kurth in 1940-41 and laboratory work was commenced in 1942 by B. J. Ralph B.Sc. and A.B. Wardrop M.Sc. They published a paper on the dilute acid autoclaving of e.obliqua in the April 1946 idition of the Journal of the Australian Chemical Institute.
The investigations carried out since February 1944 are described in this paper. In 1944 M.H.R. Shipp B.Sc. and D. H. Foster B.Sc. continued the work on wood hydrolysis under the direction of Mr. B. J4 Ralph. .Whereas previous experiments had been confined to an autoclave the hydrolytic process was now carried out in a percolator in which dilute acid was passed continuously through the wood. They made a preliminary investigation on the effect of the variables of temperature and time on the hydrolysis of a sample of e.obliqua.
In 1945 Shipp and 0. G. Ingles B.Sc. modified the percolator, and under the direction of Mr. B. J. Ralph they performed experimental work on the investigation of the effect of temperature, strength of acid , time and rate of acid flow on the hydrolysis of e.obliqua. These results were interpreted by Foster and are presented in this paper.
Foster returned to the work on wood hydrolysis in February 1946 after an absence of twelve months in the R.A.A.F. He investigated the hydrolysis of eleven different Tasmanian woods under the direction of Prof. E. E. Kurth and carried out some work on the analysis of specific sugars and organic acids in sugar solutions obtained by hydrolysing woods.
The author wishes to express his thanks to Professor E, E. Kurth and Mr. B. J, Ralph for their every assistance and their valuable advice.
The author also wishes to thank Mr. A. Clarke,
Chief of the Division of Forest Products,
for many communications on various aspects of wood chemistry
Subjects/Keywords: Wood; Percolation
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APA (6th Edition):
Foster, D. H. (1947). The dilute acid hydrolysis of Tasmanian woods in percolation apparatus. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/19971/1/whole_FosterDenistounHenry1947_thesis.pdf
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):
Foster, Denistoun Henry. “The dilute acid hydrolysis of Tasmanian woods in percolation apparatus.” 1947. Thesis, University of Tasmania. Accessed January 15, 2021.
https://eprints.utas.edu.au/19971/1/whole_FosterDenistounHenry1947_thesis.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Foster, Denistoun Henry. “The dilute acid hydrolysis of Tasmanian woods in percolation apparatus.” 1947. Web. 15 Jan 2021.
Vancouver:
Foster DH. The dilute acid hydrolysis of Tasmanian woods in percolation apparatus. [Internet] [Thesis]. University of Tasmania; 1947. [cited 2021 Jan 15].
Available from: https://eprints.utas.edu.au/19971/1/whole_FosterDenistounHenry1947_thesis.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Foster DH. The dilute acid hydrolysis of Tasmanian woods in percolation apparatus. [Thesis]. University of Tasmania; 1947. Available from: https://eprints.utas.edu.au/19971/1/whole_FosterDenistounHenry1947_thesis.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
UCLA
11.
Yeung, Fiona.
A Complex Network Method for Traffic Modeling and Control.
Degree: Statistics, 2017, UCLA
URL: http://www.escholarship.org/uc/item/5ct600k6
► Transportation systems are the economic foundation of any regional development. Our reliance on transportation to move goods and resources and to ensure access to labor…
(more)
▼ Transportation systems are the economic foundation of any regional development. Our reliance on transportation to move goods and resources and to ensure access to labor to increase productivity, all have tremendous impact on revenue generation and growth. Traffic congestion is an inevitable byproduct of economic growth; the costs of traffic is not just time wasted, but also include the financial loss and environmental impacts of fuel being wasted. As an effort to understand congestion formation, this project investigates modeling traffic as a network and uses a percolation model to identify a normal traffic pattern as exhibited by the inhabitants of the region. Using real street maps from the OpenStreetMap project, morning, noon, and evening rush-hour traffic zones in Westwood Village were created to simulate the travel behavior of the inhabitants. The street bottlenecks identified for a 24-hr period were then compared to those formed from a uniform traffic flow. The results from this study may provide the foundation for a reasonable starting configuration for a self-organizing traffic light network that can dynamically adapt to unexpected demand in real-time.
Subjects/Keywords: Statistics; network; percolation; traffic
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APA (6th Edition):
Yeung, F. (2017). A Complex Network Method for Traffic Modeling and Control. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/5ct600k6
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):
Yeung, Fiona. “A Complex Network Method for Traffic Modeling and Control.” 2017. Thesis, UCLA. Accessed January 15, 2021.
http://www.escholarship.org/uc/item/5ct600k6.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yeung, Fiona. “A Complex Network Method for Traffic Modeling and Control.” 2017. Web. 15 Jan 2021.
Vancouver:
Yeung F. A Complex Network Method for Traffic Modeling and Control. [Internet] [Thesis]. UCLA; 2017. [cited 2021 Jan 15].
Available from: http://www.escholarship.org/uc/item/5ct600k6.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yeung F. A Complex Network Method for Traffic Modeling and Control. [Thesis]. UCLA; 2017. Available from: http://www.escholarship.org/uc/item/5ct600k6
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
12.
Stevenson, David Stuart.
Percolation of soil water as related to consumptive use.
Degree: MS, Soils, 1956, Oregon State University
URL: http://hdl.handle.net/1957/51207
Subjects/Keywords: Soil percolation
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APA (6th Edition):
Stevenson, D. S. (1956). Percolation of soil water as related to consumptive use. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/51207
Chicago Manual of Style (16th Edition):
Stevenson, David Stuart. “Percolation of soil water as related to consumptive use.” 1956. Masters Thesis, Oregon State University. Accessed January 15, 2021.
http://hdl.handle.net/1957/51207.
MLA Handbook (7th Edition):
Stevenson, David Stuart. “Percolation of soil water as related to consumptive use.” 1956. Web. 15 Jan 2021.
Vancouver:
Stevenson DS. Percolation of soil water as related to consumptive use. [Internet] [Masters thesis]. Oregon State University; 1956. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/1957/51207.
Council of Science Editors:
Stevenson DS. Percolation of soil water as related to consumptive use. [Masters Thesis]. Oregon State University; 1956. Available from: http://hdl.handle.net/1957/51207
Michigan State University
13.
Vollbrecht, Howard Albert.
A correlation study of infiltration, permeability, and pore size distribution.
Degree: MS, 1954, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:7344
Subjects/Keywords: Soil percolation
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APA (6th Edition):
Vollbrecht, H. A. (1954). A correlation study of infiltration, permeability, and pore size distribution. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:7344
Chicago Manual of Style (16th Edition):
Vollbrecht, Howard Albert. “A correlation study of infiltration, permeability, and pore size distribution.” 1954. Masters Thesis, Michigan State University. Accessed January 15, 2021.
http://etd.lib.msu.edu/islandora/object/etd:7344.
MLA Handbook (7th Edition):
Vollbrecht, Howard Albert. “A correlation study of infiltration, permeability, and pore size distribution.” 1954. Web. 15 Jan 2021.
Vancouver:
Vollbrecht HA. A correlation study of infiltration, permeability, and pore size distribution. [Internet] [Masters thesis]. Michigan State University; 1954. [cited 2021 Jan 15].
Available from: http://etd.lib.msu.edu/islandora/object/etd:7344.
Council of Science Editors:
Vollbrecht HA. A correlation study of infiltration, permeability, and pore size distribution. [Masters Thesis]. Michigan State University; 1954. Available from: http://etd.lib.msu.edu/islandora/object/etd:7344
University of Arizona
14.
Dai, Yan.
Mirror Model and Critical Percolation
.
Degree: 2019, University of Arizona
URL: http://hdl.handle.net/10150/634358
► The mirror model on the two-dimensional square lattice is a random walk that begins at the origin. For the first step, the walker randomly chooses…
(more)
▼ The mirror model on the two-dimensional square lattice is a random walk that begins at the origin. For the first step, the walker randomly chooses one of four directions, north, east, south or west. After the first step, the walker only turns either left or right with equal probability but cannot go straight or backwards at each site. If the walker returns to a site that has been visited before, it has to make the same turn as the previous visiting time. The walk stops if it revisits the first bond. Note that the walk is not allowed to revisit the bond that has been visited before, and no site is visited more than twice.
We refer to this walk model as the mirror model. Since for each vertex in Z2, we can position a two-sided mirror, either a north-west mirror or a north-east mirror, with probability 1/2 to correspond the turn that the walk makes at the site. For any walk starting at the origin, we can find the corresponding mirror configuration associated with it.
In the first part of the dissertation, we describe its relation to interfaces for bond
percolation on the square lattice. We then study the nature of the mirror model process on the square lattice, and use some
percolation results to show localization, self-touching property, and some other properties that the mirror model has.
This random walk model is related to bond
percolation, and critical
percolation cluster interfaces are conjectured to converge to Schramm-Loewner evolution with κ = 6 (SLE6). So we believe that the scaling limit of the mirror model on the square lattice as the lattice spacing going to zero is SLE6. We test this conjecture with numerical simulations of the model and find a good agreement with predictions of SLE6. This is the second part of the dissertation.
The last part is devoted to another random walk model – loop erased mirror model (LEMM). We consider mirror model on the square lattice in a bounded simply connected domain that starts and ends at two prescribed boundary points. The walk can revisit a site it has been before and hence form a loop. The LEMM that we study is the simple path defined by erasing these loops in chronological order. Many two- dimensional critical lattice model are believed to have conformally invariant scaling limit. The new loop-erased process is arising from the mirror model, and mirror model is related to critical bond
percolation, so we conjecture that the scaling limit of LEMM is conformally invariant. We test this conjecture with Monte Carlo simulations of LEMM and find strong support for the conjecture.
Advisors/Committee Members: Kennedy, Tom (advisor), Sethuraman, Sunder (committeemember), Sims, Robert (committeemember), Watkins, Joseph (committeemember).
Subjects/Keywords: percolation;
random walk;
SLE
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APA (6th Edition):
Dai, Y. (2019). Mirror Model and Critical Percolation
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/634358
Chicago Manual of Style (16th Edition):
Dai, Yan. “Mirror Model and Critical Percolation
.” 2019. Doctoral Dissertation, University of Arizona. Accessed January 15, 2021.
http://hdl.handle.net/10150/634358.
MLA Handbook (7th Edition):
Dai, Yan. “Mirror Model and Critical Percolation
.” 2019. Web. 15 Jan 2021.
Vancouver:
Dai Y. Mirror Model and Critical Percolation
. [Internet] [Doctoral dissertation]. University of Arizona; 2019. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/10150/634358.
Council of Science Editors:
Dai Y. Mirror Model and Critical Percolation
. [Doctoral Dissertation]. University of Arizona; 2019. Available from: http://hdl.handle.net/10150/634358
University of Limerick
15.
Faqeeh, Ali.
Percolation and its relations to other processes in networks.
Degree: 2016, University of Limerick
URL: http://hdl.handle.net/10344/5580
► peer-reviewed
Many of the systems we observe in nature, in societies, or in infrastructures are in the form of a network of interacting units. This…
(more)
▼ peer-reviewed
Many of the systems we observe in nature, in societies, or in infrastructures are in the
form of a network of interacting units. This underlying network structure shapes the
behavior of such systems and is an indispensable factor in maintaining their correct
function. Likewise, the processes that operate on these systems are largely influenced
by their network structure. In this thesis, we investigate the theoretical approaches for
investigation of the properties of percolation processes on networks.
Percolation processes investigate the alteration of network connectivity. Two such
processes that constitute the main focus of this thesis are bond and site percolation,
which are simple models for the robustness of a network to random failures of (or
intentional attacks to) its constituting units. They also have been used to provide better
insight on some other more complicated processes such as spread of epidemic diseases
or stability of genetic networks, because some important features of these processes
can be mapped to percolation properties.
In this thesis, we first consider the so-called Aij theories developed for percolation
and several other processes that operate on networks. We investigate the e ect of
the presence of high density of short loops (a property observed in many real-world
networks) on the accuracy of Aij theories and show its impact on the performance of
these theories. We then show that another phenomenon, the emergence of coexisting
percolating clusters, can also cause significant inaccuracy in the Aij theory for bond
percolation on certain synthetic and real-world networks. Moreover, we introduce a
new theoretical approach that takes into account this phenomenon and improves upon
the state-of-the-art Aij theory. Then, we develop a theoretical framework for calculation
of percolation cluster sizes and discuss its potential applications in studying the
properties of neuronal avalanches.
Advisors/Committee Members: Gleeson, James P., SFI, ERC.
Subjects/Keywords: percolation processes; network structure
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APA (6th Edition):
Faqeeh, A. (2016). Percolation and its relations to other processes in networks. (Thesis). University of Limerick. Retrieved from http://hdl.handle.net/10344/5580
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):
Faqeeh, Ali. “Percolation and its relations to other processes in networks.” 2016. Thesis, University of Limerick. Accessed January 15, 2021.
http://hdl.handle.net/10344/5580.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Faqeeh, Ali. “Percolation and its relations to other processes in networks.” 2016. Web. 15 Jan 2021.
Vancouver:
Faqeeh A. Percolation and its relations to other processes in networks. [Internet] [Thesis]. University of Limerick; 2016. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/10344/5580.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Faqeeh A. Percolation and its relations to other processes in networks. [Thesis]. University of Limerick; 2016. Available from: http://hdl.handle.net/10344/5580
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Canterbury
16.
Lee, Michael James.
Methods in Percolation.
Degree: PhD, Physics, 2008, University of Canterbury
URL: http://dx.doi.org/10.26021/6625
► Algorithms are presented for the computationally efficient manipulation of graphs. These are subsequently used as the basis of a Monte Carlo method for sampling from…
(more)
▼ Algorithms are presented for the computationally efficient manipulation of graphs.
These are subsequently used as the basis of a Monte Carlo method for sampling from the microcanonical ensemble of lattice configurations of a percolation model within a neighbourhood of the critical point.
This new method arbitrarily increments and decrements the number of occupied lattice sites, and is shown to be a generalisation of several earlier, purely incremental, methods.
As demonstrations of capability, the method was used to construct a phase diagram for exciton transport on a disordered surface, and to study finite size effects upon the incipient spanning cluster.
Application of the method to the classical site percolation model on the two-dimensional square lattice resulted in an exceptionally precise estimate of the critical threshold.
Although this estimate is not in agreement with earlier results, its accuracy was established through an application specific test of randomness, which is also introduced here.
The same test suggests that many earlier results have been systematically biased due to the use of deficient pseudorandom number generators.
The estimate made here has since been independently confirmed.
Subjects/Keywords: percolation; methods
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APA (6th Edition):
Lee, M. J. (2008). Methods in Percolation. (Doctoral Dissertation). University of Canterbury. Retrieved from http://dx.doi.org/10.26021/6625
Chicago Manual of Style (16th Edition):
Lee, Michael James. “Methods in Percolation.” 2008. Doctoral Dissertation, University of Canterbury. Accessed January 15, 2021.
http://dx.doi.org/10.26021/6625.
MLA Handbook (7th Edition):
Lee, Michael James. “Methods in Percolation.” 2008. Web. 15 Jan 2021.
Vancouver:
Lee MJ. Methods in Percolation. [Internet] [Doctoral dissertation]. University of Canterbury; 2008. [cited 2021 Jan 15].
Available from: http://dx.doi.org/10.26021/6625.
Council of Science Editors:
Lee MJ. Methods in Percolation. [Doctoral Dissertation]. University of Canterbury; 2008. Available from: http://dx.doi.org/10.26021/6625
University of British Columbia
17.
Mante, Eugene Frederick Gyampo.
Studies on soil permeability.
Degree: MS- MSc, Soil Science, 1963, University of British Columbia
URL: http://hdl.handle.net/2429/37571
► Laboratory tests were performed to investigate the possibilities of using a modified form of Steinbrenner’s apparatus to estimate the intrinsic permeabilities of four different soils.…
(more)
▼ Laboratory tests were performed to investigate the possibilities of using a modified form of Steinbrenner’s apparatus to estimate the intrinsic permeabilities of four different soils. Readings were taken on soils at the same moisture content but different void ratios; and on soils at the same void ratio but different moisture contents. Straight line graphs of positive slopes were obtained when the logarithm of intrinsic permeability was plotted against void ratio for peat, a sandy loam and synthetic soils. Results were extremely variable in the case of a clay soil.
An attempt was made to relate the permeability estimated with the apparatus and using air as the permeant to the permeability estimated with water on core samples. Some correlation was observed between the two types of tests on the sandy loam and synthetic soils; but there was no correlation in the case of the peat and clay soils.
Results, in general, were variable.
Subjects/Keywords: Soil percolation
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APA (6th Edition):
Mante, E. F. G. (1963). Studies on soil permeability. (Masters Thesis). University of British Columbia. Retrieved from http://hdl.handle.net/2429/37571
Chicago Manual of Style (16th Edition):
Mante, Eugene Frederick Gyampo. “Studies on soil permeability.” 1963. Masters Thesis, University of British Columbia. Accessed January 15, 2021.
http://hdl.handle.net/2429/37571.
MLA Handbook (7th Edition):
Mante, Eugene Frederick Gyampo. “Studies on soil permeability.” 1963. Web. 15 Jan 2021.
Vancouver:
Mante EFG. Studies on soil permeability. [Internet] [Masters thesis]. University of British Columbia; 1963. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/2429/37571.
Council of Science Editors:
Mante EFG. Studies on soil permeability. [Masters Thesis]. University of British Columbia; 1963. Available from: http://hdl.handle.net/2429/37571
18.
Anderson, Amandine.
Potentiel d'émission et de transfert de colloïdes et nanoparticules manufacturées issus de lixiviats de déchets solides et nanomatériaux : Emission potential and transfer of colloids and engineered nanoparticles from solid waste leachates, liquid wastes and nanomaterials.
Degree: Docteur es, Chimie de l'environnement, 2016, Toulon
URL: http://www.theses.fr/2016TOUL0020
► Une grande variabilité de déchets contenants des nanomatériaux sont largement produits partout dans le monde. En fin de vie, la lixiviation de ces déchets entreposés…
(more)
▼ Une grande variabilité de déchets contenants des nanomatériaux sont largement produits partout dans le monde. En fin de vie, la lixiviation de ces déchets entreposés en décharge, conduit à l’émission de contaminants (organiques et métalliques) dont les modes de transport diffèrent largement selon leurs interactions avec les ligands du milieu traversé. L’union européenne souhaite promouvoir à long terme la réduction progressive des rejets de contaminants dans l'environnement et le Ministère de l’Ecologie projette de mettre en place des normes spécifiques limitant les émissions de nanoparticules. Or, à ce jour, peu de données sont disponibles sur les quantités de contaminants potentiellement émis par les déchets et sur leur capacité de transport. En particulier, les contaminants présents sous forme nanoparticulaires, facilement bioassimilables, ont un comportement dynamique mal identifié et donc peu prévisible.La complexité et la variabilité dans la composition des déchets et des nanomatériaux impliquent l'étude d'un large panel d'entre eux ; ainsi, notre travail a porté sur la quantification de l'émission des nanoparticules au cours de leur vieillissement à partir de différents déchets (résidus de boues rouges, boues de station d’épuration, sédiments marins et Mâchefers d'Incinérations d’Ordures Ménagères MIOMs) ainsi que leur transport à travers un milieu poreux.Nous avons identifié les éléments métalliques fortement présents sous forme colloïdale et leur devenir après 1 an et demi de vieillissement. Les tests de transport des nanoparticules, menés par des expériences de percolation en colonne, ont montré que le transport de nanoparticules métalliques a été facilité dans certains cas, dans d’autres, plus classiquement ralenti. Par microscopie Electronique à Balayage, nous avons montré que de nombreux métaux étaient couplés avec des oxydes d'aluminium et de fer ainsi que des substances organiques naturelles de type humiques.
Great variability of nanomaterials wastes are widely produced throughout the world. At the end of their life, the leaching of the wastes stored in landfills, leads to the emission of contaminants (organic and metallic) which modes of transport differ widely according to the interactions they have with ligands present in the medium. The European Union wants to promote long-term gradual reduction of contaminant releases to the environment and the Ministry of Ecology plans to establish specific standards limiting emissions of nanoparticles. But to date, limited data are available on the quantities of contaminants potentially emitted by wastes and their transport capacity. In particular, the contaminants present in nanoparticulate form, easily bioavailable, have a dynamic behavior misidentified and therefore unpredictable.The complexity and variability in the composition of waste and nanomaterials involve the study of a wide range of them; so, our work has focused on quantifying the emission of nanoparticles during their aging from various wastes (red mud residues, sewage sludge, marine sediments…
Advisors/Committee Members: Merdy, Patricia (thesis director).
Subjects/Keywords: Métaux; Déchets; Percolation en colonne; NTA; Metals; Wastes; Column percolation; NTA
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APA ·
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APA (6th Edition):
Anderson, A. (2016). Potentiel d'émission et de transfert de colloïdes et nanoparticules manufacturées issus de lixiviats de déchets solides et nanomatériaux : Emission potential and transfer of colloids and engineered nanoparticles from solid waste leachates, liquid wastes and nanomaterials. (Doctoral Dissertation). Toulon. Retrieved from http://www.theses.fr/2016TOUL0020
Chicago Manual of Style (16th Edition):
Anderson, Amandine. “Potentiel d'émission et de transfert de colloïdes et nanoparticules manufacturées issus de lixiviats de déchets solides et nanomatériaux : Emission potential and transfer of colloids and engineered nanoparticles from solid waste leachates, liquid wastes and nanomaterials.” 2016. Doctoral Dissertation, Toulon. Accessed January 15, 2021.
http://www.theses.fr/2016TOUL0020.
MLA Handbook (7th Edition):
Anderson, Amandine. “Potentiel d'émission et de transfert de colloïdes et nanoparticules manufacturées issus de lixiviats de déchets solides et nanomatériaux : Emission potential and transfer of colloids and engineered nanoparticles from solid waste leachates, liquid wastes and nanomaterials.” 2016. Web. 15 Jan 2021.
Vancouver:
Anderson A. Potentiel d'émission et de transfert de colloïdes et nanoparticules manufacturées issus de lixiviats de déchets solides et nanomatériaux : Emission potential and transfer of colloids and engineered nanoparticles from solid waste leachates, liquid wastes and nanomaterials. [Internet] [Doctoral dissertation]. Toulon; 2016. [cited 2021 Jan 15].
Available from: http://www.theses.fr/2016TOUL0020.
Council of Science Editors:
Anderson A. Potentiel d'émission et de transfert de colloïdes et nanoparticules manufacturées issus de lixiviats de déchets solides et nanomatériaux : Emission potential and transfer of colloids and engineered nanoparticles from solid waste leachates, liquid wastes and nanomaterials. [Doctoral Dissertation]. Toulon; 2016. Available from: http://www.theses.fr/2016TOUL0020
University of Gothenburg / Göteborgs Universitet
19.
Hallqvist Elias, Karl Olof.
Geometrical and percolative properties of spatially correlated models.
Degree: 2020, University of Gothenburg / Göteborgs Universitet
URL: http://hdl.handle.net/2077/63419
► This thesis consists of four papers dealing with phase transitions in various models of continuum percolation. These models exhibit complicated dependencies and are generated by…
(more)
▼ This thesis consists of four papers dealing with phase transitions in various
models of continuum percolation. These models exhibit complicated dependencies
and are generated by different Poisson processes. For each such process
there is a parameter, known as the intensity, governing its behavior. By varying
the value of this parameter, the geometrical and topological properties of these
models may undergo dramatic and rapid changes. This phenomenon is called
a phase transition and the value at which the change occur is called a critical
value.
In Paper I, we study the topic of visibility in the vacant set of the Brownian
interlacements in Euclidean space and the Brownian excursions process in the
unit disc. For the vacant set of the Brownian interlacements we obtain upper
and lower bounds of the probability of having visibility in some direction to a
distance r in terms of the probability of having visibility in a fixed direction
of distance r. For the vacant set of the Brownian excursions we prove a phase
transition in terms of visibility to infinity (with respect to the hyperbolic metric).
We also determine the critical value and show that at the critical value there is
no visibility to infinity.
In Paper II we compute the critical value for percolation in the vacant set of
the Brownian excursions process. We also show that the Brownian excursions
process is a hyperbolic analogue of the Brownian interlacements. In Paper III, we study the vacant set of a semi scale invariant version of the
Poisson cylinder model. In this model it turns out that the vacant set is a fractal.
We determine the critical value for the so-called existence phase transition and
what happens at the critical value. We also compute the Hausdorff dimension of
the fractal whenever it exists. Furthermore, we prove that the fractal exhibits a
nontrivial connectivity phase transition for dimensions four and greater and that the fractal is totally
disconnected for dimension two. In the three dimensional case we prove a partial result showing that the fractal restricted to a plane is totally disconnected with probability one. In Paper IV we study a continuum percolation process, the random ellipsoid
model, generated by taking the intersection of a Poisson cylinder model in d dimensions and a subspace of dimension k. For k between 2 and d-2, we show that there is a non-trivial phase transition concerning the expected number of ellipsoids in the cluster of the origin. When k=d-1 this critical value is zero. We compare these results with results for the classical Poisson Boolean model.
Subjects/Keywords: continuum percolation,; brownian excursions; brownian interlacements; poisson cylinder model; fractal percolation
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APA (6th Edition):
Hallqvist Elias, K. O. (2020). Geometrical and percolative properties of spatially correlated models. (Thesis). University of Gothenburg / Göteborgs Universitet. Retrieved from http://hdl.handle.net/2077/63419
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):
Hallqvist Elias, Karl Olof. “Geometrical and percolative properties of spatially correlated models.” 2020. Thesis, University of Gothenburg / Göteborgs Universitet. Accessed January 15, 2021.
http://hdl.handle.net/2077/63419.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hallqvist Elias, Karl Olof. “Geometrical and percolative properties of spatially correlated models.” 2020. Web. 15 Jan 2021.
Vancouver:
Hallqvist Elias KO. Geometrical and percolative properties of spatially correlated models. [Internet] [Thesis]. University of Gothenburg / Göteborgs Universitet; 2020. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/2077/63419.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hallqvist Elias KO. Geometrical and percolative properties of spatially correlated models. [Thesis]. University of Gothenburg / Göteborgs Universitet; 2020. Available from: http://hdl.handle.net/2077/63419
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Wright State University
20.
Yu, Fang.
Modeling of Soil Formation on The Basis of Chemical
Weathering: Applications FromPercolation Theory.
Degree: PhD, Environmental Sciences PhD, 2018, Wright State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=wright1526563165403061
► The concept of soil formation has been studied since the beginning of 19th century. However, until recently, there has been little concrete progress on developing…
(more)
▼ The concept of soil formation has been studied since
the beginning of 19th century. However, until recently, there has
been little concrete progress on developing an analytical result to
relate soil depth or quality to measurable variables that represent
the five soil-forming factors including time, parent material,
topography, climate, and organisms. It has become increasingly
clear that soil formation rates are closely related to chemical
weathering rates. In this dissertation, we propose a theoretical
approach to model soil formation process within the theoretical
framework of
percolation theory, which has been shown to
successfully predict solute transport in heterogeneous media. From
percolation theory, solute transport rate does not equal to flow
rate beyond the length scale of a typical pore size, as is the case
in Gaussian solute transport. Rather, it diminishes in accord with
heavy-tailed solute arrival time distributions as it travels. The
basis of our model relies on the hypothesis that the chemical
weathering of bedrock is simultaneously the limiting factor for
soil formation and most strongly limited by solute transport in
porous media. To test the hypothesis, we propose a revised method
to calculate Damkohler number within the same theoretical framework
to evaluate the relevant importance of solute transport in limiting
chemical weathering, and results imply that chemical weathering is
nearly always solute transport-limited in natural media. We then
examine the proposed models by comparing predictions with field
data across a wide range of climatic conditions, as well as at
steep topography. Results show good agreement between predictions
and field observations. We also present two applications of the
proposed model to geomorphology to examine the local steady-state
assumption of soil and to distinguish steady and stochastic erosion
process in threshold landscapes. The applications demonstrate the
potential to adopt our model into geomorphological models such as
landscape evolution models, and landsliding models to predict
shallow landslides.
Advisors/Committee Members: Hunt, Allen (Advisor).
Subjects/Keywords: Environmental Science; Geomorphology; Geochemistry; soil formation; chemical weathering; percolation; percolation theory
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APA (6th Edition):
Yu, F. (2018). Modeling of Soil Formation on The Basis of Chemical
Weathering: Applications FromPercolation Theory. (Doctoral Dissertation). Wright State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=wright1526563165403061
Chicago Manual of Style (16th Edition):
Yu, Fang. “Modeling of Soil Formation on The Basis of Chemical
Weathering: Applications FromPercolation Theory.” 2018. Doctoral Dissertation, Wright State University. Accessed January 15, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=wright1526563165403061.
MLA Handbook (7th Edition):
Yu, Fang. “Modeling of Soil Formation on The Basis of Chemical
Weathering: Applications FromPercolation Theory.” 2018. Web. 15 Jan 2021.
Vancouver:
Yu F. Modeling of Soil Formation on The Basis of Chemical
Weathering: Applications FromPercolation Theory. [Internet] [Doctoral dissertation]. Wright State University; 2018. [cited 2021 Jan 15].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1526563165403061.
Council of Science Editors:
Yu F. Modeling of Soil Formation on The Basis of Chemical
Weathering: Applications FromPercolation Theory. [Doctoral Dissertation]. Wright State University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1526563165403061
University of Gothenburg / Göteborgs Universitet
21.
Ahlberg, Daniel.
Asymptotics and dynamics in first-passage and continuum percolation.
Degree: 2011, University of Gothenburg / Göteborgs Universitet
URL: http://hdl.handle.net/2077/26666
► This thesis combines the study of asymptotic properties of percolation processes with various dynamical concepts. First-passage percolation is a model for the spatial propagation of…
(more)
▼ This thesis combines the study of asymptotic properties of percolation processes with various dynamical concepts. First-passage percolation is a model for the spatial propagation of a fluid on a discrete structure; the Shape Theorem describes its almost sure convergence towards an asymptotic shape, when considered on the square (or cubic) lattice. Asking how percolation structures are affected by simple dynamics or small perturbations presents a dynamical aspect. Such questions were previously studied for discrete processes; here, sensitivity to noise is studied in continuum percolation.
Paper I studies first-passage percolation on certain 1-dimensional graphs. It is found that when identifying a suitable renewal sequence, its asymptotic behaviour is much better understood compared to higher dimensional cases. Several analogues of classical 1-dimensional limit theorems are derived.
Paper II is dedicated to the Shape Theorem itself. It is shown that the convergence, apart from holding almost surely and in L1, also holds completely. In addition, inspired by dynamical percolation and dynamical versions of classical limit theorems, the almost sure convergence is proved to be dynamically stable. Finally, a third generalization of the Shape Theorem shows that the above conclusions also hold for first-passage percolation on certain cone-like subgraphs of the lattice.
Paper III proves that percolation crossings in the Poisson Boolean model, also known as the Gilbert disc model, are noise sensitive. The approach taken generalizes a method introduced by Benjamini, Kalai and Schramm. A key ingredient in the argument is an extremal result on arbitrary hypergraphs, which is used to show that almost no information about the critical process is obtained when conditioning on a denser Poisson process.
Subjects/Keywords: first-passage percolation; noise sensitivity; continuum percolation; Gilbert model; limit theorems; shape theorem; stopped random walks; large deviations; dynamical percolation
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APA (6th Edition):
Ahlberg, D. (2011). Asymptotics and dynamics in first-passage and continuum percolation. (Thesis). University of Gothenburg / Göteborgs Universitet. Retrieved from http://hdl.handle.net/2077/26666
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):
Ahlberg, Daniel. “Asymptotics and dynamics in first-passage and continuum percolation.” 2011. Thesis, University of Gothenburg / Göteborgs Universitet. Accessed January 15, 2021.
http://hdl.handle.net/2077/26666.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ahlberg, Daniel. “Asymptotics and dynamics in first-passage and continuum percolation.” 2011. Web. 15 Jan 2021.
Vancouver:
Ahlberg D. Asymptotics and dynamics in first-passage and continuum percolation. [Internet] [Thesis]. University of Gothenburg / Göteborgs Universitet; 2011. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/2077/26666.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ahlberg D. Asymptotics and dynamics in first-passage and continuum percolation. [Thesis]. University of Gothenburg / Göteborgs Universitet; 2011. Available from: http://hdl.handle.net/2077/26666
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
22.
Levin, Zachary Solomon.
Polyaniline-Based Nanocomposite Strain Sensors.
Degree: MS, Mechanical Engineering, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10322
► Health monitoring is an important field as small failures can build up and cause a catastrophic failure. Monitoring the health of a structure can be…
(more)
▼ Health monitoring is an important field as small failures can build up and cause a catastrophic failure. Monitoring the health of a structure can be done by measuring the motion of the structure through the use of strain sensors. The limitations of current strain sensing technology; cost, size, form could be improved. This research intends to improve current strain sensing technology by creating a conductive polymer composite that can be used monitor health in structures. Conductive polymer composites are a viable candidate due to the low costs of manufacturing, tailorable mechanical and electrical properties, and uniform microstructure. This work will focus on determining if a all-polymer composite can be used as a strain sensor, and investigating the effects of filler, doping and latex effect the electrical and strain sensing properties.
Strain sensors were prepared from polyaniline (PANI)-latex composites, the morphology, mechanical, electrical and strain sensing properties were evaluated. These strain sensors were capable of repeatable measuring strain to 1% and able to measure strain until the substrates failure at 5% strain, with a sensitivity (measured by gauge factor) of between 6-8 (metal foil strain sensors have a gauge factor of 2). The best performing strain sensor consisted of 4 wt.% polyaniline. This composition had the best combination of gauge factor, linearity, and signal stability.
Further experiments were conducting to see if improvements could be made by changing the polymer used for the matrix material, the molecular weight and the level of doping of the polyaniline. Results indicate through differences in strain sensing response; lower hysteresis and unrecoverable conductivity, that polyaniline latex composites can be adjusted to further improve their performance.
The polyaniline-latex composites were able to repeatable measure strain to 1%, as well as strain until failure and with gauge factor between 6-8, and a 70% increase in signal at failure. These properties make these composites viable candidates to monitor health in structures, buildings, bridges, and damns.
Advisors/Committee Members: Grunlan, Jaime C. (advisor), Clearfield, Abraham (committee member), Lalk, Thomas (committee member).
Subjects/Keywords: Polyaniline; Nanocomposite; Segregated Network; Strain Sensor; Percolation
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MLA ·
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APA (6th Edition):
Levin, Z. S. (2012). Polyaniline-Based Nanocomposite Strain Sensors. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10322
Chicago Manual of Style (16th Edition):
Levin, Zachary Solomon. “Polyaniline-Based Nanocomposite Strain Sensors.” 2012. Masters Thesis, Texas A&M University. Accessed January 15, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10322.
MLA Handbook (7th Edition):
Levin, Zachary Solomon. “Polyaniline-Based Nanocomposite Strain Sensors.” 2012. Web. 15 Jan 2021.
Vancouver:
Levin ZS. Polyaniline-Based Nanocomposite Strain Sensors. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10322.
Council of Science Editors:
Levin ZS. Polyaniline-Based Nanocomposite Strain Sensors. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10322
Penn State University
23.
Xiang, Wang.
Essays in the Economic Theory of Social Networks.
Degree: 2017, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/14402wxx108
► In this dissertation, I provide three social network models addressing different aspects of the economy. First, I consider the issue of social network formation. Meeting…
(more)
▼ In this dissertation, I provide three social network models addressing different aspects of the economy.
First, I consider the issue of social network formation. Meeting with strangers and meeting with friends’ friends are two common patterns when observing the formation of social networks and thus are widely adopted in many statistical network formation settings. I establish a network formation model trying to find the individual level incentive behind the two patterns. Each agent enters the network sequentially choosing
between forming global random links or connecting with friends' friends, knowing that his payoff depends on the distance between the player with valuable information and himself. I find that the distance between players in the resulting network asymptotically follows a Weibull distribution and the link formation decision depends on how easily information can be transmitted under the network. When the transmission is relatively easy and information can be received from far away, players prefer to meet with strangers. Otherwise they prefer to connect with friends’ friends.
The second model considers a moral hazard scenario in which a monitor must detect deviations so as to provide proper incentives to attain an efficient outcome. What if the monitor himself were to deviate after being bribed by his monitored
subject? I explore a multi-agent public-good provision game in which each player prefers shirking to working in the absence of exogenous enforcement and can bribe those assigned to monitor him. I find that when players agree to cooperate in choosing an optimally designed monitoring
network, a core-periphery monitoring network results, with a small group of heavily monitored players who monitor all others. Under this network, a perfect Bayesian equilibrium (PBE) is supported in which shirking is prevented, bribing among players ceases and total monitoring costs are minimized. Further, the efficiency of this core-periphery structure is robust under various settings, including the dynamic spread of bribing, and under different punishments and monitoring schedules.
Lastly, I consider a phenomenon of innovation adoption and diffusion. Innovations are crucial to the long run economic growth; however, not all new ideas are adopted by the majority of the society even though similar ones which appear later turn out to be commercial successes. I establish a model in which multiple potential entrants each can bring a new technology into a market with consumers connected under a social network.
Technology has the character of network externality and entrants must rely on the word-of-mouth communication under the social network to promote their products. I find that high quality innovations are not guaranteed to perform better than low quality ones under the scenario and timing is a crucial determinant of their commercial performances. Low quality innovation firms are likely to enter the market whenever possible but high quality ones might strategically wait for a proper time to acquire a better market share.
Advisors/Committee Members: Kalyan Chatterjee, Dissertation Advisor/Co-Advisor, Kalyan Chatterjee, Committee Chair/Co-Chair, Vijay Krishna, Committee Member, James Schuyler Jordan, Committee Member, Reka Z Albert, Outside Member.
Subjects/Keywords: Network; Structural Hole; Strong Tie; Monitoring; Percolation
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APA (6th Edition):
Xiang, W. (2017). Essays in the Economic Theory of Social Networks. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/14402wxx108
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):
Xiang, Wang. “Essays in the Economic Theory of Social Networks.” 2017. Thesis, Penn State University. Accessed January 15, 2021.
https://submit-etda.libraries.psu.edu/catalog/14402wxx108.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Xiang, Wang. “Essays in the Economic Theory of Social Networks.” 2017. Web. 15 Jan 2021.
Vancouver:
Xiang W. Essays in the Economic Theory of Social Networks. [Internet] [Thesis]. Penn State University; 2017. [cited 2021 Jan 15].
Available from: https://submit-etda.libraries.psu.edu/catalog/14402wxx108.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Xiang W. Essays in the Economic Theory of Social Networks. [Thesis]. Penn State University; 2017. Available from: https://submit-etda.libraries.psu.edu/catalog/14402wxx108
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
24.
Li, Weiqiang.
Using percolation techniques to estimate interwell connectivity probability.
Degree: MS, Petroleum Engineering, 2009, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-1954
► Reservoir connectivity is often an important consideration for reservoir management. For example, connectivity is an important control on waterflood sweep efficiency and requires evaluation to…
(more)
▼ Reservoir connectivity is often an important consideration for reservoir management. For example, connectivity is an important control on waterflood sweep efficiency and requires evaluation to optimize injection well rates. The uncertainty of sandbody distributions, however, can make interwell connectivity prediction extremely difficult.
Percolation models are a useful tool to simulate sandbody connectivity behavior and can be used to estimate interwell connectivity. This study discusses the universal characteristics of different sandbody
percolation models and develops an efficient
percolation method to estimate interwell connectivity. Using King and others results for fluid travel time between locations in a
percolation model, we developed a method to estimate interwell connectivity. Three parameters are needed to use this approach: the sandbody occupied probabilitysandp, the dimensionless reservoir length, and the well spacing. To evaluate this new
percolation method, the procedure was coded using Visual Basic and Mathematica and the results compared to those from two other methods, a simple geometrical model and Monte Carlo simulation. All these methods were applied to estimate interwell connectivity for the D1, D2, and D3 intervals in the Monument Butte field. The results suggest that the new
percolation method can give reasonable effective-square sandbody dimensions and can estimate the interwell connectivity accurately for thin intervals with sandp in the 60% to 80% range. The proposed method requires that the reservoir interval for evaluation be sufficiently thin so that 2D
percolation results can be applied. To extend the method to 3D cases, we propose an approach that can be used to estimate interwell connectivity for reservoirs having multiple, noncommunicating layers, and that considers the weight of each interval for multilayer estimation. This approach is applied to the three-layer case of Monument Butte field and the estimates showed the method gives useful results for well pattern design. For example, water saturation and interval thickness affect the weight of each interval to be included in the multilayer estimation. For thick intervals or heterogeneous sandbody distributions, the
percolation method developed here is not suitable because it assumes thin layers. Future
percolation research will be needed to adapt this new
percolation method.
Advisors/Committee Members: Jensen, Jerry (advisor), Ayers, Walter B. (committee member), Gibson, Richard (committee member).
Subjects/Keywords: PERCOLATION; INTERWELL CONNECTIVITY
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Manager
APA (6th Edition):
Li, W. (2009). Using percolation techniques to estimate interwell connectivity probability. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-1954
Chicago Manual of Style (16th Edition):
Li, Weiqiang. “Using percolation techniques to estimate interwell connectivity probability.” 2009. Masters Thesis, Texas A&M University. Accessed January 15, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-1954.
MLA Handbook (7th Edition):
Li, Weiqiang. “Using percolation techniques to estimate interwell connectivity probability.” 2009. Web. 15 Jan 2021.
Vancouver:
Li W. Using percolation techniques to estimate interwell connectivity probability. [Internet] [Masters thesis]. Texas A&M University; 2009. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1954.
Council of Science Editors:
Li W. Using percolation techniques to estimate interwell connectivity probability. [Masters Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1954
Brigham Young University
25.
Clayton, Marianne E.
Modeling Piezoresistive Effects in Flexible Sensors.
Degree: MS, 2019, Brigham Young University
URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=8396&context=etd
► This work describes a model of the piezoresistive behavior in nanocomposite sensors. These sensors are also called flexible sensors because the polymer matrix allows for…
(more)
▼ This work describes a model of the piezoresistive behavior in nanocomposite sensors. These sensors are also called flexible sensors because the polymer matrix allows for large deformations without failure. The sensors have conductive nanoparticles dispersed through an insulative polymer matrix. The insulative polymer gaps between nanoparticles are assumed to be possible locations for electron tunneling. When the distance between two nanoparticles is small enough, electrons can tunnel from one nanoparticle to the next and ultimately through the entire sensor. The evolution of this gap distance with strain is important to understand the overall conductivity of the strain sensor. The gap evolution was modeled in two ways: (1) applying Poisson's contraction to the sensor as a homogenous material, referred to as Simple Poisson's Contraction (SPC) and (2) modeling the nanoparticle-polymer system with Finite Element Analysis (FEA). These two gap evolution models were tested in a random resistor network model where each polymer gap was treated as a single resistor in the network. The overall resistance was calculated by solving the resistor network system. The SPC approach, although much simpler, was sufficient for cases where various orientations of nanoparticles were used in the same sensor. The SPC model differed significantly from the FEA, however, in cases where nanoparticles had specific alignment, e.g. all nanoparticles parallel to the tensile axis. It was also found that the distribution used to determine initial gap sizes for the polymer gaps as well as the mean of that distribution significantly impacted the overall resistivity of the sensor.Another key part of this work was to determine if the piezoresistivity in the sensors follows a percolation type behavior under strain. The conductance versus strain curve showed the characteristic s-curve behavior of a percolative system. The conductance-strain curve was also compared to the effective medium and generalized effective medium equations and the latter (which includes percolation theory) fit the random resistor network much more closely. Percolation theory is, therefore, an accurate way to describe this polymer-nanoparticle piezoresistive system.Finally, the FEA and SPC models were compared against experimental data to verify their accuracy. There are also two design problems addressed: one to find the sensor with the largest gauge factor and another to determine how to remove the characteristic initial spike in resistivity seen in nanocomposite sensors.
Subjects/Keywords: nanocomposite sensor; percolation theory; piezoresistivity; quantum tunneling
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APA (6th Edition):
Clayton, M. E. (2019). Modeling Piezoresistive Effects in Flexible Sensors. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=8396&context=etd
Chicago Manual of Style (16th Edition):
Clayton, Marianne E. “Modeling Piezoresistive Effects in Flexible Sensors.” 2019. Masters Thesis, Brigham Young University. Accessed January 15, 2021.
https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=8396&context=etd.
MLA Handbook (7th Edition):
Clayton, Marianne E. “Modeling Piezoresistive Effects in Flexible Sensors.” 2019. Web. 15 Jan 2021.
Vancouver:
Clayton ME. Modeling Piezoresistive Effects in Flexible Sensors. [Internet] [Masters thesis]. Brigham Young University; 2019. [cited 2021 Jan 15].
Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=8396&context=etd.
Council of Science Editors:
Clayton ME. Modeling Piezoresistive Effects in Flexible Sensors. [Masters Thesis]. Brigham Young University; 2019. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=8396&context=etd
26.
Nguyen, Thi Thuy Nga.
Modélisation de la croissance des villes : Simulation of the growth of cities.
Degree: Docteur es, Mathématiques, 2014, Université d'Orléans
URL: http://www.theses.fr/2014ORLE2004
► Dans cette thèse nous proposons et nous mettons en application plusieurs modèles décrivant la croissance et la morphologie du tissu urbain. Le premier de ces…
(more)
▼ Dans cette thèse nous proposons et nous mettons en application plusieurs modèles décrivant la croissance et la morphologie du tissu urbain. Le premier de ces modèles est issu de la percolation en gradient (correlée) déjà proposé de la littérature. Le second, inédit, fait appel à un équation différentielle stochastique. Nos modèles sont paramétrables : les paramètres que nous avons choisi d’appliquer sont naturels et tiennent compte de l’accessibilité des sites. Le résultat des simulations est conforme à la réalité du terrain. Par ailleurs, nous étudions la percolation en gradient: nous démontrons , suivant Nolin, que la frontière de cluster principal se situe dans un voisinage de la courbe critique et nous estimons ses longueurs et largeurs. Enfin, nous menons une étude du processus de croissance SLE. Nous calculons (preuve assistée par ordinateur) l’espérance des carrés des modules pour SLE2 and SLE6. Ces résultats sont liés à la conjecture de Bieberbach.
In this thesis we propose and test models that describe the growth and morphology of cities. The first of these models is used from previously developed correlated gradient percolation model. The second model is related to a stochastic differential equation and has never been proposed before. Both models are parameterizable. The parameters we chose in applications are well justified by physical observations: proximily to axes and accessibility of sites. The result is consistent with actual data. We also study the gradient percolation as a mathematical object. We prove, following Nolin’s ideas, that the front of gradient percolation cluster is localised in a neighborhood of the critical curve with width and length depending on density gradient. Finally, we also study SLE growth processes. We calculate (computer assisted demonstration) the expected value of square of moduli for SLE2 and SLE6 related to the Bieberbach conjecture.
Advisors/Committee Members: Zinsmeister, Michel (thesis director), Batakis, Athanasios (thesis director).
Subjects/Keywords: Modélisation; Croissance des villes; Percolation en gradient; Percolation critique; Processus de croissance SLE; Modeling; Urban growth; Gradient percolation; Critical percolation; SLE growth processes
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APA (6th Edition):
Nguyen, T. T. N. (2014). Modélisation de la croissance des villes : Simulation of the growth of cities. (Doctoral Dissertation). Université d'Orléans. Retrieved from http://www.theses.fr/2014ORLE2004
Chicago Manual of Style (16th Edition):
Nguyen, Thi Thuy Nga. “Modélisation de la croissance des villes : Simulation of the growth of cities.” 2014. Doctoral Dissertation, Université d'Orléans. Accessed January 15, 2021.
http://www.theses.fr/2014ORLE2004.
MLA Handbook (7th Edition):
Nguyen, Thi Thuy Nga. “Modélisation de la croissance des villes : Simulation of the growth of cities.” 2014. Web. 15 Jan 2021.
Vancouver:
Nguyen TTN. Modélisation de la croissance des villes : Simulation of the growth of cities. [Internet] [Doctoral dissertation]. Université d'Orléans; 2014. [cited 2021 Jan 15].
Available from: http://www.theses.fr/2014ORLE2004.
Council of Science Editors:
Nguyen TTN. Modélisation de la croissance des villes : Simulation of the growth of cities. [Doctoral Dissertation]. Université d'Orléans; 2014. Available from: http://www.theses.fr/2014ORLE2004
Oregon State University
27.
Krouss, Paul R.
Dependent site percolation models.
Degree: PhD, Mathematics, 1998, Oregon State University
URL: http://hdl.handle.net/1957/16721
Subjects/Keywords: Percolation (Statistical physics)
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APA (6th Edition):
Krouss, P. R. (1998). Dependent site percolation models. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/16721
Chicago Manual of Style (16th Edition):
Krouss, Paul R. “Dependent site percolation models.” 1998. Doctoral Dissertation, Oregon State University. Accessed January 15, 2021.
http://hdl.handle.net/1957/16721.
MLA Handbook (7th Edition):
Krouss, Paul R. “Dependent site percolation models.” 1998. Web. 15 Jan 2021.
Vancouver:
Krouss PR. Dependent site percolation models. [Internet] [Doctoral dissertation]. Oregon State University; 1998. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/1957/16721.
Council of Science Editors:
Krouss PR. Dependent site percolation models. [Doctoral Dissertation]. Oregon State University; 1998. Available from: http://hdl.handle.net/1957/16721
Boston University
28.
Zhou, Di.
Interdependent networks - topological percolation research and application in finance.
Degree: PhD, Physics, 2014, Boston University
URL: http://hdl.handle.net/2144/15118
► This dissertation covers the two major parts of my Ph.D. research: i) developing a theoretical framework of complex networks and applying simulation and numerical methods…
(more)
▼ This dissertation covers the two major parts of my Ph.D. research: i) developing a theoretical framework of complex networks and applying simulation and numerical methods to study the robustness of the network system, and ii) applying statistical physics concepts and methods to quantitatively analyze complex systems and applying the theoretical framework to study real-world systems.
In part I, we focus on developing theories of interdependent networks as well as building computer simulation models, which includes three parts: 1) We report on the effects of topology on failure propagation for a model system consisting of two interdependent networks. We find that the internal node correlations in each of the networks significantly changes the critical density of failures, which can trigger the total disruption of the two-network system. Specifically, we find that the assortativity within a single network decreases the robustness of the entire system. 2) We study the percolation behavior of two interdependent scale-free (SF) networks under random failure of 1-p fraction of nodes. We find that as the coupling strength q between the two networks reduces from 1 (fully coupled) to 0 (no coupling), there exist two critical coupling strengths q1 and q2 , which separate the behaviors of the giant component as a function of p into three different regions, and for q2 < q < q1 , we observe a hybrid order phase transition phenomenon. 3) We study the robustness of n interdependent networks with partially support-dependent relationship both analytically and numerically. We study a starlike network of n Erdos-Renyi (ER), SF networks and a looplike network of n ER networks, and we find for starlike networks, their phase transition regions change with n, but for looplike networks the phase regions change with average degree k .
In part II, we apply concepts and methods developed in statistical physics to study economic systems. We analyze stock market indices and foreign exchange daily returns for 60 countries over the period of 1999-2012. We build a multi-layer network model based on different correlation measures, and introduce a dynamic network model to simulate and analyze the initializing and spreading of financial crisis. Using different computational approaches and econometric tests, we find atypical behavior of the cross correlations and community formations in the financial networks that we study during the financial crisis of 2008. For example, the overall correlation of stock market increases during crisis while the correlation between stock market and foreign exchange market decreases. The dramatic increase in correlations between a specific nation and other nations may indicate that this nation could trigger a global financial crisis. Specifically, core countries that have higher correlations with other countries and larger Gross Domestic Product (GDP) values spread financial crisis quite effectively, yet some countries with small GDPs like Greece and Cyprus are also effective in propagating systemic risk and…
Subjects/Keywords: Physics; Networks; Percolation; Physics; Complex systems
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APA (6th Edition):
Zhou, D. (2014). Interdependent networks - topological percolation research and application in finance. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/15118
Chicago Manual of Style (16th Edition):
Zhou, Di. “Interdependent networks - topological percolation research and application in finance.” 2014. Doctoral Dissertation, Boston University. Accessed January 15, 2021.
http://hdl.handle.net/2144/15118.
MLA Handbook (7th Edition):
Zhou, Di. “Interdependent networks - topological percolation research and application in finance.” 2014. Web. 15 Jan 2021.
Vancouver:
Zhou D. Interdependent networks - topological percolation research and application in finance. [Internet] [Doctoral dissertation]. Boston University; 2014. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/2144/15118.
Council of Science Editors:
Zhou D. Interdependent networks - topological percolation research and application in finance. [Doctoral Dissertation]. Boston University; 2014. Available from: http://hdl.handle.net/2144/15118
Boston University
29.
Li, Wei.
Statistical physics approaches to complex systems.
Degree: PhD, Physics, 2013, Boston University
URL: http://hdl.handle.net/2144/15162
► This thesis utilizes statistical physics concepts and mathematical modeling to study complex systems. I investigate the emergent complexities in two systems: (i) the stock volume…
(more)
▼ This thesis utilizes statistical physics concepts and mathematical modeling to study complex systems. I investigate the emergent complexities in two systems: (i) the stock volume volatility in the United States stock market system; (ii) the robustness of networks in an interdependent lattice network system.
In Part I, I analyze the United States stock market data to identify how several financial factors significantly affect scaling properties of volume volatility time intervals. I study the daily trading volume volatility time intervals between two successive volume volatilities above a certain threshold q, and find a range of power law distributions. I also study the relations between the form of these distribution functions and several financial factors: stock lifetimes, market capitalization, volume, and trading value. I find that volume volatility time intervals are short-term correlated. I also find that the daily volume volatility shows a stronger long-term correlation for sequences of longer lifetimes.
In Part II, I apply percolation theory to interacting complex networks. The dependency links between the two square lattice networks have a typical length r lattice units. For two nodes connecting by a dependency link, one node fails once the node on which it depends in the other network fails. I show that rich phase transition phenomena exist when the length of the dependency links r changes. The results suggest that percolation for small r is a second-order transition, and for larger r is a first-order transition. The study suggests that interdependent infrastructures embedded in two-dimensional space become most vulnerable when the interdependent distance is in the intermediate range, which is much smaller than the size of the system.
Subjects/Keywords: Physics; Interdependent; Networks; Percolation; Scaling; Trading volume
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APA (6th Edition):
Li, W. (2013). Statistical physics approaches to complex systems. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/15162
Chicago Manual of Style (16th Edition):
Li, Wei. “Statistical physics approaches to complex systems.” 2013. Doctoral Dissertation, Boston University. Accessed January 15, 2021.
http://hdl.handle.net/2144/15162.
MLA Handbook (7th Edition):
Li, Wei. “Statistical physics approaches to complex systems.” 2013. Web. 15 Jan 2021.
Vancouver:
Li W. Statistical physics approaches to complex systems. [Internet] [Doctoral dissertation]. Boston University; 2013. [cited 2021 Jan 15].
Available from: http://hdl.handle.net/2144/15162.
Council of Science Editors:
Li W. Statistical physics approaches to complex systems. [Doctoral Dissertation]. Boston University; 2013. Available from: http://hdl.handle.net/2144/15162
University of Cambridge
30.
Przykucki, Michał Jan.
Extremal and probabilistic bootstrap percolation.
Degree: PhD, 2013, University of Cambridge
URL: https://www.repository.cam.ac.uk/handle/1810/245349https://www.repository.cam.ac.uk/bitstream/1810/245349/2/license.txt
;
https://www.repository.cam.ac.uk/bitstream/1810/245349/5/thesis.pdf.txt
;
https://www.repository.cam.ac.uk/bitstream/1810/245349/6/thesis.pdf.jpg
► In this dissertation we consider several extremal and probabilistic problems in bootstrap percolation on various families of graphs, including grids, hypercubes and trees. Bootstrap percolation…
(more)
▼ In this dissertation we consider several extremal and probabilistic problems in bootstrap percolation on various families of graphs, including grids, hypercubes and trees. Bootstrap percolation is one of the simplest cellular automata. The most widely studied model is the so-called r-neighbour bootstrap percolation, in which we consider the spread of infection on a graph G according to the following deterministic rule: infected vertices of G remain infected forever and in successive rounds healthy vertices with at least r already infected neighbours become infected. Percolation is said to occur if eventually every vertex is infected.
In Chapter 1 we consider a particular extremal problem in 2-neighbour bootstrap percolation on the n × n square grid. We show that the maximum time an infection process started from an initially infected set of size n can take to infect the entire vertex set is equal to the integer nearest to (5n2-2n)/8. In Chapter 2 we relax the condition on the size of the initially infected sets and show that the maximum time for sets of arbitrary size is 13n2/18+O(n).
In Chapter 3 we consider a similar problem, namely the maximum percolation time for 2-neighbour bootstrap percolation on the hypercube. We give an exact answer to this question showing that this time is \lfloor n2/3 \rfloor.
In Chapter 4 we consider the following probabilistic problem in bootstrap percolation: let T be an infinite tree with branching number \br(T) = b. Initially, infect every vertex of T independently with probability p > 0. Given r, define the critical probability, pc(T,r), to be the value of p at which percolation becomes likely to occur. Answering a problem posed by Balogh, Peres and Pete, we show that if b ≥ r then the value of b itself does not yield any non-trivial lower bound on pc(T,r). In other words, for any ε > 0 there exists a tree T with branching number \br(T) = b and critical probability pc(T,r) < ε.
However, in Chapter 5 we prove that this is false if we limit ourselves to the well-studied family of Galton – Watson trees. We show that for every r ≥ 2 there exists a constant cr>0 such that if T is a Galton – Watson tree with branching number \br(T) = b ≥ r then
[
pc(T,r) > \frac{cr}{b} e-\frac{b{r-1}}.
]
We also show that this bound is sharp up to a factor of O(b) by describing an explicit family of Galton – Watson trees with critical probability bounded from above by Cr e-\frac{b{r-1}} for some constant Cr>0.
Subjects/Keywords: Bootstrap percolation; Probabilistic combinatorics; Extremal combinatorics
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APA ·
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APA (6th Edition):
Przykucki, M. J. (2013). Extremal and probabilistic bootstrap percolation. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/245349https://www.repository.cam.ac.uk/bitstream/1810/245349/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245349/5/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245349/6/thesis.pdf.jpg
Chicago Manual of Style (16th Edition):
Przykucki, Michał Jan. “Extremal and probabilistic bootstrap percolation.” 2013. Doctoral Dissertation, University of Cambridge. Accessed January 15, 2021.
https://www.repository.cam.ac.uk/handle/1810/245349https://www.repository.cam.ac.uk/bitstream/1810/245349/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245349/5/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245349/6/thesis.pdf.jpg.
MLA Handbook (7th Edition):
Przykucki, Michał Jan. “Extremal and probabilistic bootstrap percolation.” 2013. Web. 15 Jan 2021.
Vancouver:
Przykucki MJ. Extremal and probabilistic bootstrap percolation. [Internet] [Doctoral dissertation]. University of Cambridge; 2013. [cited 2021 Jan 15].
Available from: https://www.repository.cam.ac.uk/handle/1810/245349https://www.repository.cam.ac.uk/bitstream/1810/245349/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245349/5/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245349/6/thesis.pdf.jpg.
Council of Science Editors:
Przykucki MJ. Extremal and probabilistic bootstrap percolation. [Doctoral Dissertation]. University of Cambridge; 2013. Available from: https://www.repository.cam.ac.uk/handle/1810/245349https://www.repository.cam.ac.uk/bitstream/1810/245349/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245349/5/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245349/6/thesis.pdf.jpg
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