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Iowa State University
1.
Maimaitiyiming, Wumaier.
Positive and energy stable schemes for Poisson-Nernst-Planck equations and related models.
Degree: 2020, Iowa State University
URL: https://lib.dr.iastate.edu/etd/18177
► In this thesis, we design, analyze, and numerically validate positive and energy- dissipating schemes for solving Poisson-Nernst-Planck (PNP) equations and Fokker-Planck (FP) equations with interaction…
(more)
▼ In this thesis, we design, analyze, and numerically validate positive and energy-
dissipating schemes for solving Poisson-Nernst-Planck (PNP) equations and Fokker-Planck (FP) equations with interaction potentials. These equations play an important role in modeling the dynamics of charged particles in semiconductors and biological ion channels, as well as in other applications. These model equations are nonlinear/nonlocal gradient flows in density space, and their explicit solutions are rarely available; however, solutions to such problems feature intrinsic properties such as (i) solution positivity, (ii) mass conservation, and (iii) energy dissipation. These physically relevant properties are highly desirable to be preserved at the discrete level with the least time-step restrictions.
We first construct our schemes for a reduced PNP model, then extend to multi-dimensional PNP equations and a class of FP equations with interaction potentials. The common strategies in the construction of the baseline schemes include two ingredients: (i) reformulation of each underlying model so that the resulting system is more suitable for constructing positive schemes, and (ii) integration of semi-implicit time discretization and central spatial discretization. For each model equation, we show that the semi-discrete schemes (continuous in time) preserve all three solution properties (positivity, mass conservation, and energy dissipation). The fully discrete first order schemes preserve solution positivity and mass conservation for arbitrary time steps. Moreover, there exists a discrete energy function which dissipates along time marching with an O(1) bound on time steps.
We show that the second order (in both time and space) schemes preserve solution positivity for suitably small time steps; for larger time steps, we apply a local limiter to restore the solution positivity. We prove that such limiter preserves local mass and does not destroy the approximation accuracy. In addition, the limiter provides a reliable way of restoring solution positivity for other high order conservative finite difference or finite volume schemes.
Both the first and second order schemes are linear and can be efficiently implemented without resorting to any iteration method. The second order schemes are only slight modifications of the first order schemes. Computational costs of a single time step for first and second order schemes are similar, hence our second-order in time schemes are efficient than the first-order in time schemes, given a larger time step could be utilized (to save computational cost). We conduct extensive numerical tests that support our theoretical results and illustrate the accuracy, efficiency, and capacity to preserve the solution properties of our schemes.
Subjects/Keywords: Fokker-Planck equations; Poisson-Nernst-Planck equations
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APA (6th Edition):
Maimaitiyiming, W. (2020). Positive and energy stable schemes for Poisson-Nernst-Planck equations and related models. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/18177
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):
Maimaitiyiming, Wumaier. “Positive and energy stable schemes for Poisson-Nernst-Planck equations and related models.” 2020. Thesis, Iowa State University. Accessed January 17, 2021.
https://lib.dr.iastate.edu/etd/18177.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Maimaitiyiming, Wumaier. “Positive and energy stable schemes for Poisson-Nernst-Planck equations and related models.” 2020. Web. 17 Jan 2021.
Vancouver:
Maimaitiyiming W. Positive and energy stable schemes for Poisson-Nernst-Planck equations and related models. [Internet] [Thesis]. Iowa State University; 2020. [cited 2021 Jan 17].
Available from: https://lib.dr.iastate.edu/etd/18177.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Maimaitiyiming W. Positive and energy stable schemes for Poisson-Nernst-Planck equations and related models. [Thesis]. Iowa State University; 2020. Available from: https://lib.dr.iastate.edu/etd/18177
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
2.
Antunes, Laura Catarina Seco.
Radiação de corpo negro: lei de Stefan-Boltzmann, lei do deslocamento de Wien.
Degree: 2012, RCAAP
URL: http://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/2872
► Este estudo contribui para desenvolver nos alunos o gosto pela aprendizagem da Física e, consequentemente, para melhorar o ensino desta disciplina e a qualidade dos…
(more)
▼ Este estudo contribui para desenvolver nos alunos o gosto pela aprendizagem da Física e, consequentemente, para melhorar o ensino desta disciplina e a qualidade dos seus resultados. Pretende-se que os alunos não só adquiram novos conhecimentos mas que fortaleçam os conhecimentos posteriormente adquiridos ao longo dos anos, na área da Física, desenvolvendo um conjunto de competências e capacidade, tanto gerais como específicas da disciplina.
O trabalho apresenta um desenvolvimento mais profundo do tema: Sol e aquecimento, mais especificamente sobre a radiação de corpos negros: Lei de Stefan-Boltzmann e Lei do Deslocamento de Wien.
O comportamento da radiação térmica emitida pelos corpos das mais diversas naturezas é distinto pois uma parte da radiação é refletida enquanto outra parte é absorvida pelo corpo. Estes fenómenos dependem principalmente das características específicas do corpo em estudo.
Alguns cientistas postularam que um corpo responde de forma peculiar à radiação que incide sobre a sua superfície, nascendo a ideia de “corpos negros”. A natureza de corpos negros perfeitos não foi ainda comprovada, uma vez que todo o corpo só age como corpo negro numa determinada gama de radiação, isto é, o corpo tem as suas singularidades.
Este estudo apresenta uma definição de “corpo negro”, um estudo aprofundado sobre a radiação nesses corpos, tal como a teoria na qual estes corpos se baseiam, Lei de Stefan-Boltzmann e Lei de Wien. Por sua vez, este trabalho centra-se num estudo teórico e experimental da aplicabilidade da Lei de Stefan-Boltzmann e respetiva Lei do Deslocamento de Wien.
Advisors/Committee Members: Parada, Paulo.
Subjects/Keywords: Lei de Planck; Lei de Stefan-Boltzmann
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Antunes, L. C. S. (2012). Radiação de corpo negro: lei de Stefan-Boltzmann, lei do deslocamento de Wien. (Thesis). RCAAP. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/2872
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):
Antunes, Laura Catarina Seco. “Radiação de corpo negro: lei de Stefan-Boltzmann, lei do deslocamento de Wien.” 2012. Thesis, RCAAP. Accessed January 17, 2021.
http://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/2872.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Antunes, Laura Catarina Seco. “Radiação de corpo negro: lei de Stefan-Boltzmann, lei do deslocamento de Wien.” 2012. Web. 17 Jan 2021.
Vancouver:
Antunes LCS. Radiação de corpo negro: lei de Stefan-Boltzmann, lei do deslocamento de Wien. [Internet] [Thesis]. RCAAP; 2012. [cited 2021 Jan 17].
Available from: http://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/2872.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Antunes LCS. Radiação de corpo negro: lei de Stefan-Boltzmann, lei do deslocamento de Wien. [Thesis]. RCAAP; 2012. Available from: http://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/2872
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
3.
Rodrigues, Ana Maria Manso.
Determinação dos tempos de descongelação e das percentagens de água de vidragem de várias espécies de pescado.
Degree: 2014, RCAAP
URL: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/16834
► Resumo O estágio decorreu na Eurest Portugal, uma empresa pertencente ao Grupo Compass que é líder mundial no fornecimento de serviços de alimentação e gestão…
(more)
▼ Resumo
O estágio decorreu na Eurest Portugal, uma empresa pertencente ao Grupo
Compass que é líder mundial no fornecimento de serviços de alimentação e gestão de
refeitórios, tanto na área da restauração pública como na coletiva. A gestão dos
refeitórios implica um correto e eficiente manuseamento de todos os produtos e
matérias-primas.
O tema deste trabalho surgiu devido à necessidade da empresa definir os
tempos médios de descongelação para várias espécies de pescado, bem como a
determinação das percentagens de água de vidragem do pescado recebido na unidade,
de modo a averiguar se a informação declarada no rótulo estava correta.
Através do método descrito no decreto de lei nº 37 de 2004 foi determinada a
percentagem de água de vidragem de 37 amostras de pescado (339 tomas), o que
envolveu um total de 12 espécies e 9 fornecedores. Foram comparadas as
percentagens declaradas nos rótulos com as percentagens determinadas
experimentalmente e apenas 5,6% dos rótulos é que apesentavam a mesma
percentagem à que foi determinada experimentalmente.
Quanto aos tempos de descongelação, foram mensurados os tempos de 1713
kg de pescado. A sua medição foi realizada com base num critério de observação e
toque para definir o fim da descongelação. Nesta parte do trabalho encontraram-se
algumas dificuldades devido a algumas práticas incorretas na descongelação o que
impossibilitava a descongelação completa do pescado. Devido à obtenção de poucos
resultados experimentais, foram previstos tempos através do modelo de
Planck e do
modelo da capacitância global, onde se concluiu que não pode ser utilizada a
capacidade total das caixas grandes pois o pescado que fica no centro da caixa não
descongela durante o intervalo de tempo definido pela Eurest.
Também se verificou que o local dentro da câmara (prateleira ou nas banheiras)
também influencia o tempo de descongelação.
Palavras-chave: descongelação, água de vidragem,
Planck, pescado.
vi
Abstract
The internship took place at Eurest Portugal, a company belonging by Compass
Group that is the world leader in the provider of power and management of canteens
services, both in the public and in the collective restoration. The management of
canteens implies a correct and efficient handling of all products and raw materials.
The
subject of this work arose due to the company´s need to define the average
defrosting times for several species of fish, as well as the determination of the
percentages of water glazing of the received fish in order to establish whether the
information declared in the label was correct.
The method described in the Decree Law nº 37 of 2004 the percentage of water
glazing of 37 fish samples (339 units), which involved a total of 12 species and 9 was
determined suppliers. The percentages stated on the labels with the percentages
determined experimentally were compared and only 5.6% of the labels had the same
percentage to that determined experimentally.
Relatively to defrosting times were measured times of 1713.16 kg of…
Advisors/Committee Members: Costa, Rui Manuel Machado da.
Subjects/Keywords: Descongelação; Água de vidragem; Planck; Pescado
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rodrigues, A. M. M. (2014). Determinação dos tempos de descongelação e das percentagens de água de vidragem de várias espécies de pescado. (Thesis). RCAAP. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/16834
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):
Rodrigues, Ana Maria Manso. “Determinação dos tempos de descongelação e das percentagens de água de vidragem de várias espécies de pescado.” 2014. Thesis, RCAAP. Accessed January 17, 2021.
https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/16834.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rodrigues, Ana Maria Manso. “Determinação dos tempos de descongelação e das percentagens de água de vidragem de várias espécies de pescado.” 2014. Web. 17 Jan 2021.
Vancouver:
Rodrigues AMM. Determinação dos tempos de descongelação e das percentagens de água de vidragem de várias espécies de pescado. [Internet] [Thesis]. RCAAP; 2014. [cited 2021 Jan 17].
Available from: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/16834.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rodrigues AMM. Determinação dos tempos de descongelação e das percentagens de água de vidragem de várias espécies de pescado. [Thesis]. RCAAP; 2014. Available from: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/16834
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
4.
Adesina, Owolabi Abiona.
Statistical Modelling and the Fokker-Planck Equation.
Degree: 2008, , School of Engineering
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1177
► A stochastic process or sometimes called random process is the counterpart to a deterministic process in theory. A stochastic process is a random field,…
(more)
▼ A stochastic process or sometimes called random process is the counterpart to a deterministic process in theory. A stochastic process is a random field, whose domain is a region of space, in other words, a random function whose arguments are drawn from a range of continuously changing values. In this case, Instead of dealing only with one possible 'reality' of how the process might evolve under time (as is the case, for example, for solutions of an ordinary differential equation), in a stochastic or random process there is some indeterminacy in its future evolution described by probability distributions. This means that even if the initial condition (or starting point) is known, there are many possibilities the process might go to, but some paths are more probable and others less. However, in discrete time, a stochastic process amounts to a sequence of random variables known as a time series. Over the past decades, the problems of synergetic are concerned with the study of macroscopic quantitative changes of systems belonging to various disciplines such as natural science, physical science and electrical engineering. When such transition from one state to another take place, fluctuations i.e. (random process) may play an important role. Fluctuations in its sense are very common in a large number of fields and nearly every system is subjected to complicated external or internal influences that are often termed noise or fluctuations. Fokker-Planck equation has turned out to provide a powerful tool with which the effects of fluctuation or noise close to transition points can be adequately be treated. For this reason, in this thesis work analytical and numerical methods of solving Fokker-Planck equation, its derivation and some of its applications will be carefully treated. Emphasis will be on both for one variable and N- dimensional cases.
Subjects/Keywords: Fokker Planck; Stochastic
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Adesina, O. A. (2008). Statistical Modelling and the Fokker-Planck Equation. (Thesis). , School of Engineering. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1177
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):
Adesina, Owolabi Abiona. “Statistical Modelling and the Fokker-Planck Equation.” 2008. Thesis, , School of Engineering. Accessed January 17, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1177.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Adesina, Owolabi Abiona. “Statistical Modelling and the Fokker-Planck Equation.” 2008. Web. 17 Jan 2021.
Vancouver:
Adesina OA. Statistical Modelling and the Fokker-Planck Equation. [Internet] [Thesis]. , School of Engineering; 2008. [cited 2021 Jan 17].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1177.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Adesina OA. Statistical Modelling and the Fokker-Planck Equation. [Thesis]. , School of Engineering; 2008. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1177
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Princeton University
5.
Gudmundsson, Jon Emil.
Probing Early Universe Cosmologies With SPIDER and Planck HFI
.
Degree: PhD, 2014, Princeton University
URL: http://arks.princeton.edu/ark:/88435/dsp01j3860917r
► We describe the design and characterization of the SPIDER balloon-borne experiment which will launch from Antarctica in December 2014. The experiment is designed to measure…
(more)
▼ We describe the design and characterization of the SPIDER balloon-borne experiment which will launch from Antarctica in December 2014. The experiment is designed to measure the polarization of the Cosmic Microwave Background (CMB) with unparalleled instantaneous sensitivity, and in doing so, constrain early universe models. The experiment is ready to deploy. We will emphasize: 1) The cryogenic architecture of the SPIDER flight cryostat. 2) The design and characterization of a capillary assembly which provides a continuous flow of superfluid helium to a 1.8 K temperature stage required to operate adsorption refrigerators cooling each focal plane. 3) The design and build of a Fourier transform spectrometer used to characterize the spectral response of the SPIDER detectors. 4) The optical characterization of the SPIDER telescopes and simulations characterizing susceptibility to polarized sidelobes contamination.
We also describe the analysis of the spatial (beam) response of the High Frequency Instrument (HFI) onboard the
Planck satellite. This characterization work is required for high fidelity cosmological analysis of all-sky maps in six frequency bands spanning 100 to 857 GHz. The beam reconstruction error and bias are constrained using time-domain simulations that include the most significant non-idealities that affect the analysis. Using these simulations, we also verify the consistency of the beam product used for cosmological analysis of the 2014 data release. As part of the beam reconstruction, we characterize the flux of the five outer planets in the six HFI frequency bands. We also verify the absolute photometric calibration of the experiment by comparing planet flux estimates with existing models. Finally, we use planet flux measurements to show that the absolute calibrations of the WMAP and
Planck experiments are consistent at the half percent level.
Advisors/Committee Members: Jones, William C (advisor).
Subjects/Keywords: CMB;
Cosmology;
HFI;
Inflation;
Planck;
SPIDER
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gudmundsson, J. E. (2014). Probing Early Universe Cosmologies With SPIDER and Planck HFI
. (Doctoral Dissertation). Princeton University. Retrieved from http://arks.princeton.edu/ark:/88435/dsp01j3860917r
Chicago Manual of Style (16th Edition):
Gudmundsson, Jon Emil. “Probing Early Universe Cosmologies With SPIDER and Planck HFI
.” 2014. Doctoral Dissertation, Princeton University. Accessed January 17, 2021.
http://arks.princeton.edu/ark:/88435/dsp01j3860917r.
MLA Handbook (7th Edition):
Gudmundsson, Jon Emil. “Probing Early Universe Cosmologies With SPIDER and Planck HFI
.” 2014. Web. 17 Jan 2021.
Vancouver:
Gudmundsson JE. Probing Early Universe Cosmologies With SPIDER and Planck HFI
. [Internet] [Doctoral dissertation]. Princeton University; 2014. [cited 2021 Jan 17].
Available from: http://arks.princeton.edu/ark:/88435/dsp01j3860917r.
Council of Science Editors:
Gudmundsson JE. Probing Early Universe Cosmologies With SPIDER and Planck HFI
. [Doctoral Dissertation]. Princeton University; 2014. Available from: http://arks.princeton.edu/ark:/88435/dsp01j3860917r

University of Sydney
6.
Noble, Patrick.
Stochastic processes in Astrophysics
.
Degree: 2013, University of Sydney
URL: http://hdl.handle.net/2123/10013
► This thesis makes two contributions to the solar literature. The first is the development and application of a formal statistical framework for describing short-term (daily)…
(more)
▼ This thesis makes two contributions to the solar literature. The first is the development and application of a formal statistical framework for describing short-term (daily) variation in the level of magnetic activity on the Sun. Modelling changes on this time-scale is important because rapid developments of magnetic structures on the sun have important consequences for the space weather experienced on Earth (Committee On The Societal & Economic Impacts Of Severe Space Weather Events, 2008). The second concerns how energetic particles released from the Sun travel through the solar wind. The contribution from this thesis is to resolve a mathematical discrepancy in theoretical models for the transport of charged particles.
Subjects/Keywords: Sunspot Number;
Space Weather;
Fokker-Planck Equation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Noble, P. (2013). Stochastic processes in Astrophysics
. (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/10013
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):
Noble, Patrick. “Stochastic processes in Astrophysics
.” 2013. Thesis, University of Sydney. Accessed January 17, 2021.
http://hdl.handle.net/2123/10013.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Noble, Patrick. “Stochastic processes in Astrophysics
.” 2013. Web. 17 Jan 2021.
Vancouver:
Noble P. Stochastic processes in Astrophysics
. [Internet] [Thesis]. University of Sydney; 2013. [cited 2021 Jan 17].
Available from: http://hdl.handle.net/2123/10013.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Noble P. Stochastic processes in Astrophysics
. [Thesis]. University of Sydney; 2013. Available from: http://hdl.handle.net/2123/10013
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
7.
Sauvé, Alexandre.
Caractérisation des effets systématiques de l'instrument Planck/HFI, propagation et impact sur les données scientifiques : Characterization of the systematic effects on the Planck/HFI instrument, propagation and impact on science data.
Degree: Docteur es, Astrophysique, 2016, Université Toulouse III – Paul Sabatier
URL: http://www.theses.fr/2016TOU30362
► Planck est un satellite de l'ESA lancé en 2009, qui avais pour mission de faire une carte de très grande précision du rayonnement fossile de…
(more)
▼ Planck est un satellite de l'ESA lancé en 2009, qui avais pour mission de faire une carte de très grande précision du rayonnement fossile de l'Univers, afin de mieux comprendre comment il s'est formé. Cet objectif ambitieux nécessite un niveau de maîtrise extrême des effets instrumentaux. Cependant en cours de mission il s'est avéré que le composant responsable de la numérisation des données scientifiques introduisait un bisais important qui compromettait l'exploitation scientifique des données de l'instrument Planck/HFI. Ce travail décris comment ce biais a été compris et corrigé avec succès. Une analyse très poussée a été conduite sur les détecteurs du satellite, la chaine cryogénique embarquée et le composant de numérisation lui même. Ce qui a nécessité une méthodologie spécifique afin de télécharger les données nécessaire depuis le satellite avant sa fin de mission et son décommissionnement.
Planck is an ESA spacecraft launched in 2009, its mission goal was to map with an exquisite precision the first light of Universe, to help understanding how it has formed. This ambitious objective requires a very high level of control on the instrumental effects. During the mission, it has been found that the component responsible of the digitization of scientific data introduced an unexpectedly high bias effect, preventing full exploitation of data from the Planck/HFI instrument. The present work relates how this bias effect was understood and successfully corrected for. A very deep analysis of the spacecraft detectors, the cryogenic chain, and the digitization component has been performed, which required a specific methodology to gather data from the spacecraft before the end of the mission and its decommissioning.
Advisors/Committee Members: Montier, Ludovic (thesis director), Banday, Anthony J. (thesis director).
Subjects/Keywords: ADC; Planck; HFI; Effets systématiques; Instrument; Bolomètre; CMB; ADC; Planck; HFI; Systematics; Bolometer; Instrument; CMB
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sauvé, A. (2016). Caractérisation des effets systématiques de l'instrument Planck/HFI, propagation et impact sur les données scientifiques : Characterization of the systematic effects on the Planck/HFI instrument, propagation and impact on science data. (Doctoral Dissertation). Université Toulouse III – Paul Sabatier. Retrieved from http://www.theses.fr/2016TOU30362
Chicago Manual of Style (16th Edition):
Sauvé, Alexandre. “Caractérisation des effets systématiques de l'instrument Planck/HFI, propagation et impact sur les données scientifiques : Characterization of the systematic effects on the Planck/HFI instrument, propagation and impact on science data.” 2016. Doctoral Dissertation, Université Toulouse III – Paul Sabatier. Accessed January 17, 2021.
http://www.theses.fr/2016TOU30362.
MLA Handbook (7th Edition):
Sauvé, Alexandre. “Caractérisation des effets systématiques de l'instrument Planck/HFI, propagation et impact sur les données scientifiques : Characterization of the systematic effects on the Planck/HFI instrument, propagation and impact on science data.” 2016. Web. 17 Jan 2021.
Vancouver:
Sauvé A. Caractérisation des effets systématiques de l'instrument Planck/HFI, propagation et impact sur les données scientifiques : Characterization of the systematic effects on the Planck/HFI instrument, propagation and impact on science data. [Internet] [Doctoral dissertation]. Université Toulouse III – Paul Sabatier; 2016. [cited 2021 Jan 17].
Available from: http://www.theses.fr/2016TOU30362.
Council of Science Editors:
Sauvé A. Caractérisation des effets systématiques de l'instrument Planck/HFI, propagation et impact sur les données scientifiques : Characterization of the systematic effects on the Planck/HFI instrument, propagation and impact on science data. [Doctoral Dissertation]. Université Toulouse III – Paul Sabatier; 2016. Available from: http://www.theses.fr/2016TOU30362
8.
Thomas, Matthieu.
Détermination de la constante de Planck au moyen d'une balance du watt : Determination of the Planck constant by means of a watt balance.
Degree: Docteur es, Lasers, nanosciences et métrologie, 2015, Paris, CNAM
URL: http://www.theses.fr/2015CNAM1033
► Dans l'optique d'une modification du Système international d'unités (SI) fondée sur la valeur de constantes fondamentales de la physique, le Laboratoire national de métrologie et…
(more)
▼ Dans l'optique d'une modification du Système international d'unités (SI) fondée sur la valeur de constantes fondamentales de la physique, le Laboratoire national de métrologie et d'essais (LNE) a développé une expérience de balance du watt de manière à participer à la redéfinition de l'unité de masse : le kilogramme. Cette unité est en effet la dernière des unités de base du SI qui repose encore sur un artefact matériel : le prototype international du kilogramme.Une bobine circulaire, plongée dans un flux magnétique radial et horizontal est le coeur du dispositif de la balance du watt. Parcourue par un courant (phase statique), il s'exerce sur elle une force de Laplace nominalement verticale qui est comparée au poids d'une masse étalon. Déplacée de manière nominalement verticale (phase dynamique), il apparaît à ses bornes une tension.Il résulte de la combinaison de ces deux étapes l'égalité d'une puissance électrique et d'une puissance mécanique virtuelles. La détermination des grandeurs électriques par comparaison à l'effet Josephson et à l'effet Hall quantique permet d'établir une relation entre une masse macroscopique et la constante de Planck.Après une dizaine d'années de développements séparés des différents éléments, de très nombreuses caractérisations et améliorations, les premiers travaux de cette thèse ont consisté en l'assemblage des sous-ensembles de la balance du watt.Nous nous sommes ensuite intéressés à l'évaluation des composantes principales d'incertitudes et notamment à celles liées aux problématiques d'alignement : en particulier l'alignement sur la verticale des faisceaux lasers des interféromètres mesurant la vitesse de la bobine, l'alignement sur l'horizontale des pivots du comparateur de forces, et enfin l'évaluation des forces de Laplace horizontales et des moments parasites s'exerçant sur la bobine et leurs influences sur la détermination de la constante de Planck.Une valeur de la constante de Planck a été déterminée à l'été 2014, qui conduit à h=6,6260688(20)E-34 Js, évaluation dont l'incertitude-type relative est 3.1E-7. Des propositions pour améliorer cette incertitude sont avancées.
In the pespective of a modification of the Système international of units (SI) based on value of fondamental constants of physics, the Laboratoire national de métrologie et d'essais (LNE) has developped a watt balance experiment, in order to contribute to the redefinition of the unit of mass: the kilogramm. Indeed, this unit is the last one of the base units of the SI which is based on a material artefact: the international prototype of kilogram.A circular coil, immersed in a horizontal and radial magnetic flux is the centre of the watt balance device. Flown by a current (static phase), it exerts on it a nominaly vertical Laplace force which is compared to the weight of a standard mass. Moved nominally vertically (dynamic phase), it appears at its terminals a voltage.It results from the combination of these two steps an equality of virtual electric and mechanical powers. The determination of electrical…
Advisors/Committee Members: Juncar, Patrick (thesis director).
Subjects/Keywords: Constante de Planck; Métrologie; Si; Kilogramme; Forces; Planck constant; Metrology; Si; Kilogram; Forces; 530
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Thomas, M. (2015). Détermination de la constante de Planck au moyen d'une balance du watt : Determination of the Planck constant by means of a watt balance. (Doctoral Dissertation). Paris, CNAM. Retrieved from http://www.theses.fr/2015CNAM1033
Chicago Manual of Style (16th Edition):
Thomas, Matthieu. “Détermination de la constante de Planck au moyen d'une balance du watt : Determination of the Planck constant by means of a watt balance.” 2015. Doctoral Dissertation, Paris, CNAM. Accessed January 17, 2021.
http://www.theses.fr/2015CNAM1033.
MLA Handbook (7th Edition):
Thomas, Matthieu. “Détermination de la constante de Planck au moyen d'une balance du watt : Determination of the Planck constant by means of a watt balance.” 2015. Web. 17 Jan 2021.
Vancouver:
Thomas M. Détermination de la constante de Planck au moyen d'une balance du watt : Determination of the Planck constant by means of a watt balance. [Internet] [Doctoral dissertation]. Paris, CNAM; 2015. [cited 2021 Jan 17].
Available from: http://www.theses.fr/2015CNAM1033.
Council of Science Editors:
Thomas M. Détermination de la constante de Planck au moyen d'une balance du watt : Determination of the Planck constant by means of a watt balance. [Doctoral Dissertation]. Paris, CNAM; 2015. Available from: http://www.theses.fr/2015CNAM1033
9.
Fanciullo, Lapo.
Nouveaux aperçus sur les propriétés des poussières à partir des données Planck en intensité et polarisation : New insights on dust properties from Planck intensity and polarization data.
Degree: Docteur es, Sciences de l'Univers, 2015, Université Paris-Saclay (ComUE)
URL: http://www.theses.fr/2015SACLS194
► Les poussières interstellaires sont une composante clé du milieu interstellaire (MIS). Elles jouent non seulement un rôleimportant dans la physique et la chimie du MIS,…
(more)
▼ Les poussières interstellaires sont une composante clé du milieu interstellaire (MIS). Elles jouent non seulement un rôleimportant dans la physique et la chimie du MIS, mais elles servent également de traceur, du gaz via leur émissionthermique, et du champ magnétique interstellaire via la polarisation de cette émission.De nombreux modèles de poussières reproduisent les principales observables sur les poussières (la courbe d'extinction,la distribution spectrale d'énergie (SED), la polarisation en extinction et en émission), tout en respectant les abundancecosmiques élémentaires. Notre compréhension des poussières reste cependant toujours incomplète, en particulier surl'origine physique des variations de l'extinction et de l'émission des poussières dans le MIS. Le changement d'opacitédes poussières entre le milieu diffus et les nuages moléculaires est bien établi, et des modèles physiques d'interprétationont été proposés. Avec ses cartes de l'émission submillimétrique de tout le ciel à plusieurs longueurs d'onde, le surveysubmillimétrique de
Planck nous permet pour la première fois de mesurer la température des poussières, et d'étudierainsi les variations d'opacité des poussières dans le milieu diffus.Cette thèse, basée sur une comparaison des données
Planck avec des mesures en extinction en direction d'étoiles et dequasars, combine modélisation et analyse de données, afin de contraindre les variations des propriétés optiques despoussières dans le MIS diffus, et d'estimer les contributions respectives de l'alignement et de l'évolution des poussières àleur émission polarisée.La première partie de la thèse se focalise sur l'émission non polarisée des poussières dans le MIS diffus. L'étude desvariations de l'émission par unité d'extinction permet de contraindre les variations des propriétées optiques despoussières. Nous fittons les 20 SEDs normalisées en extinction de
Planck Intermediate Results XXIX à l'aide de troismodèles de poussière (Draine & Li 2007, Compiegne et al 2011, Jones etal 2013). Le meilleur accord entre modèle etobservations est obtenu pour le modèle utilisant les grains plus émissifs (Jones 2013), dont les propriétés optiques sontbasées sur des données de laboratoires portant sur les silicates et carbones amorphes. En combinant la mesure del'extinction et de la SED sur la même ligne de visée, nous obtenons un nouvel estimateur de l'intensité du rayonnementinterstellaire G0,, qui s'avère moins biaisé que celui obtenu par un fit de la SED. Aucun des modèles n'arrive àreproduire simultanément les variations de G0 et de la SED à propriétés optiques des poussières fixes. A l'aide de notreestimateur, nous démontrons que la variation des propriétées optiques et de l'intensité du rayonnement interstellaire ontdes contributions semblables aux variations observées des SED dans le MIS diffus.La seconde partie de la thèse se focalise sur l'extinction et l'émission polarisées dans les nuages moléculaires. Enconfrontant des données
Planck et des observations stellaires à un modèle de poussières, nous tentons de…
Advisors/Committee Members: Guillet, Vincent (thesis director), Boulanger, François (thesis director).
Subjects/Keywords: Milieu interstellaire; Poussières; Polarisation; Planck; Modélisation; Interstellar medium; Dust; Polarization; Planck; Modeling
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fanciullo, L. (2015). Nouveaux aperçus sur les propriétés des poussières à partir des données Planck en intensité et polarisation : New insights on dust properties from Planck intensity and polarization data. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2015SACLS194
Chicago Manual of Style (16th Edition):
Fanciullo, Lapo. “Nouveaux aperçus sur les propriétés des poussières à partir des données Planck en intensité et polarisation : New insights on dust properties from Planck intensity and polarization data.” 2015. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed January 17, 2021.
http://www.theses.fr/2015SACLS194.
MLA Handbook (7th Edition):
Fanciullo, Lapo. “Nouveaux aperçus sur les propriétés des poussières à partir des données Planck en intensité et polarisation : New insights on dust properties from Planck intensity and polarization data.” 2015. Web. 17 Jan 2021.
Vancouver:
Fanciullo L. Nouveaux aperçus sur les propriétés des poussières à partir des données Planck en intensité et polarisation : New insights on dust properties from Planck intensity and polarization data. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2015. [cited 2021 Jan 17].
Available from: http://www.theses.fr/2015SACLS194.
Council of Science Editors:
Fanciullo L. Nouveaux aperçus sur les propriétés des poussières à partir des données Planck en intensité et polarisation : New insights on dust properties from Planck intensity and polarization data. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2015. Available from: http://www.theses.fr/2015SACLS194
10.
PetrÃcio Barrozo da Silva.
Transporte de partÃculas em sistemas mesoscÃpicos.
Degree: PhD, 2009, Universidade Federal do Ceará
URL: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2684
;
► Neste trabalho, estudamos as propriedades do transporte de partÃculas em sistemas mesoscÃpicos. Na primeira parte, usamos o modelo proposto anteriormente por Zapperi et al. (Phys.…
(more)
▼ Neste trabalho, estudamos as propriedades do transporte de partÃculas em sistemas mesoscÃpicos. Na primeira parte, usamos o modelo proposto anteriormente por Zapperi et al. (Phys. Rev. Lett. 86, 3622 (2001)) para descrever o transporte de partÃculas superamortecidas e interagentes no estado estacionÃrio, na presenÃa de um obstÃculo para o fluxo, e confinadas em um canal com largura da ordem do comprimento caracterÃstico do sistema. Com este modelo, obtivemos uma equaÃÃo diferencial de primeira ordem nÃo-linear, cuja soluÃÃo em 1D Ã capaz de descrever a densidade ao longo de um canal 2D para diferentes sistemas de partÃculas (e.g., vÃrtices em supercondutores, colÃides e pedestres, todos simulados por dinÃmica molecular) e diferentes tipos de obstÃculos (e.g., uma barreira de energia, um canal com uma constriÃÃo e uma rede de pinos no centro do canal). Observamos que este modelo pode ser usado para descrever o escoamento de qualquer sistema de partÃculas superamortecido, desde que as interaÃÃes entre elas possam alcanÃar distÃncias maiores que os primeiros vizinhos.
Na segunda parte deste trabalho, estudamos o escoamento de partÃculas interagentes (nÃo necessariamente superamortecidas) confinadas por paredes assimÃtricas. Aqui o objetivo à descrever a dinÃmica de pedestres e a dinÃmica de vÃrtices em supercondutores. Em ambos os sistemas, as paredes assimÃtricas sÃo responsÃveis pela introduÃÃo de um sentido preferencial para o fluxo. No caso da dinÃmica de pedestres, estudamos as propriedades do sistema quando os pedestres andam em sentidos opostos. Verificamos que este confinamento induz uma ordem responsÃvel pela maximizaÃÃo do escoamento. Esta ordem pode ser destruÃda quando variamos a densidade, a velocidade, a razÃo entre a largura do canal e a sua rugosidade, o ruÃdo externo e a assimetria do canal. Verificamos tambÃm que as transiÃÃes de ordem-desordem neste sistema sÃo acompanhadas de metaestabilidades e ciclos de histerese. No caso de vÃrtices em
supercondutores, verificamos que, para pequenos campos de comensurabilidade entre o nÃmero de "catracas" e o nÃmero de vÃrtices, o sistema apresenta mÃltiplas transiÃÃes de depinamento.
In this work we investigate the transport properties of particles in mesoscopic systems. In the first part, we use the model originally proposed by Zapperi et al. (Phys. Rev. Lett. 86, 3622 (2001)) to describe the
steady-state transport of overdamped particles in the presence of an obstacle and confined to a channel with width of the order of the characteristic size of the system. With this model, we obtain a non-linear first-order differential equation, whose solution in 1D is capable to describe the behavior of the particle density along a 2D channel for different particle systems (e.g., superconducting vortices, colloids and pedestrians, all simulated with molecular dynamics) and obstacle types (e.g, one energy barrier, a channel constriction and a network of pinning centers). We observe that such a model can be used to…
Advisors/Committee Members: Josà Soares de Andrade JÃnior.
Subjects/Keywords: SISTEMAS DINAMICOS; VÃrtices; ColÃides; Pedestres; DinÃmica molecular; EquaÃÃo de Fokker-Planck; Vortices; Colloids; Pedestrian; Molecular dynamics; Fokker-Planck
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Silva, P. B. d. (2009). Transporte de partÃculas em sistemas mesoscÃpicos. (Doctoral Dissertation). Universidade Federal do Ceará. Retrieved from http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2684 ;
Chicago Manual of Style (16th Edition):
Silva, PetrÃcio Barrozo da. “Transporte de partÃculas em sistemas mesoscÃpicos.” 2009. Doctoral Dissertation, Universidade Federal do Ceará. Accessed January 17, 2021.
http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2684 ;.
MLA Handbook (7th Edition):
Silva, PetrÃcio Barrozo da. “Transporte de partÃculas em sistemas mesoscÃpicos.” 2009. Web. 17 Jan 2021.
Vancouver:
Silva PBd. Transporte de partÃculas em sistemas mesoscÃpicos. [Internet] [Doctoral dissertation]. Universidade Federal do Ceará 2009. [cited 2021 Jan 17].
Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2684 ;.
Council of Science Editors:
Silva PBd. Transporte de partÃculas em sistemas mesoscÃpicos. [Doctoral Dissertation]. Universidade Federal do Ceará 2009. Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2684 ;
11.
George Frederick Tavares da Silva.
TermoestatÃstica do Movimento Superamortecido de
PartÃculas Interagentes
.
Degree: PhD, 2013, Universidade Federal do Ceará
URL: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9127
;
► As equaÃÃes nÃo lineares de Fokker-Planck - EFPNL sÃo equaÃÃes diferenciais capazes de descrever macroscopicamente sistemas fÃsicos e quÃmicos que apresentam algum tipo de difusÃo…
(more)
▼ As equaÃÃes nÃo lineares de Fokker-Planck - EFPNL sÃo equaÃÃes diferenciais capazes de descrever macroscopicamente sistemas fÃsicos e quÃmicos que apresentam algum tipo de difusÃo anÃmala. Como exemplos de aplicaÃÃes de importÃncia cientÃfica e tecnolÃgica, podemos citar o processo de transporte em meios porosos, a dinÃmica de crescimento de superfÃcies, difusÃo de polÃmeros do tipo micelas quebrÃveis e dinÃmica de vÃrtices em supercondutores do tipo II. Para este Ãltimo, sabe-se que o movimento de vÃrtices causa dissipaÃÃo de energia, e a interaÃÃo entre eles pode ser representada por uma funÃÃo do tipo Bessel modificada. Portanto, no sentido de modelar vÃrtices em supercondutores, estudamos o movimento de partÃculas interagentes em regime de superamortecimento e em contato com um reservatÃrio tÃrmico a temperatura T, utilizando esse mesmo tipo de interaÃÃo para vÃrtices. Mostramos entÃo, por meio do formalismo das equaÃÃes nÃo lineares de Fokker-Planck, que hà uma associaÃÃo do sistema em estudo, no limite de temperatura T=0, com a estatÃstica generalizada de Tsallis. Para comprovar essa relaÃÃo direta utilizamos o conhecido teorema H e suas generalizaÃÃes, o qual permite uma relaÃÃo entre o funcional entrÃpico generalizado com uma famÃlia de EFPNL. Mostramos ainda que para temperaturas relativamente altas, o sistema deve ser melhor representado pela estatÃstica padrÃo de Boltzmann-Gibbs, pois a funÃÃo distribuiÃÃo de partÃculas, no estado estacionÃrio, tem a forma de uma gaussiana. AlÃm dos resultados analÃticos para a funÃÃo distribuiÃÃo, resultados numÃricos foram obtidos para o movimento superamortecido de partÃculas interagentes por meio de DinÃmica Molecular com a inclusÃo de um ruÃdo branco (aditivo), confirmando assim os resultados teÃricos.
The Fokker-Planck equations of nonlinear - EFPNL are differential equations able to describe macroscopic physical and chemical systems that have some type of anomalous diffusion. Examples of applications of scientific and technological importance, we may cite the case of transport in porous media, the growth dynamics of surfaces, diffusion of polymerlike breakable micelles and the dynamics of interacting vortices in type II superconductors. For the latter, it is known that the vortex motion causes power dissipation, and the interaction between them can be represented by a modified Bessel function type. Therefore, in order to model vortices in superconductors, we study the overdamped motion of interacting particles in contact with a thermal reservoir at temperature T, using the same type of interaction for vortices. We show, by means of the nonlinear Fokker-Planck equations formalism, that there is an association of the system under study, in the temperature limit T = 0, with the generalized Tsallis statistics. To prove this direct relation, we use the well-known H theorem and its generalizations, which allows an unambiguous relationship between the generalized entropy function with EFPNL. We show that even for relatively high temperatures, the system should be…
Advisors/Committee Members: Andrà Auto Moreira.
Subjects/Keywords: FISICA DA MATERIA CONDENSADA; DifusÃo, Fokker-Planck, Tsallis, VÃrtices, Supercondutores, DinÃmica Molecular.; Diffusion, Fokker-Planck, Tsallis, Vortices, Superconductors, Molecular Dynamics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Silva, G. F. T. d. (2013). TermoestatÃstica do Movimento Superamortecido de
PartÃculas Interagentes
. (Doctoral Dissertation). Universidade Federal do Ceará. Retrieved from http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9127 ;
Chicago Manual of Style (16th Edition):
Silva, George Frederick Tavares da. “TermoestatÃstica do Movimento Superamortecido de
PartÃculas Interagentes
.” 2013. Doctoral Dissertation, Universidade Federal do Ceará. Accessed January 17, 2021.
http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9127 ;.
MLA Handbook (7th Edition):
Silva, George Frederick Tavares da. “TermoestatÃstica do Movimento Superamortecido de
PartÃculas Interagentes
.” 2013. Web. 17 Jan 2021.
Vancouver:
Silva GFTd. TermoestatÃstica do Movimento Superamortecido de
PartÃculas Interagentes
. [Internet] [Doctoral dissertation]. Universidade Federal do Ceará 2013. [cited 2021 Jan 17].
Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9127 ;.
Council of Science Editors:
Silva GFTd. TermoestatÃstica do Movimento Superamortecido de
PartÃculas Interagentes
. [Doctoral Dissertation]. Universidade Federal do Ceará 2013. Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9127 ;

Universidade Estadual de Campinas
12.
Alarcon LLacctarimay, Cesar Juan, 1982-.
Modelagem da distribuição de matéria em um anel em presença de Shepherds, via equação de Fokker-Planck: Modeling the distribution of matter in a ring in the presence of sheperds, via Fokker-Planck equation.
Degree: 2012, Universidade Estadual de Campinas
URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/278457
► Abstract: In this thesis we intend to model the distribution of matter in a thin stellar ring immersed in the gravitational field of one and…
(more)
▼ Abstract: In this thesis we intend to model the distribution of matter in a thin stellar ring immersed in the gravitational field of one and two shepherd satellites using the Fokker-
Planck equation. In particular, we study the evolution of a thin ring around a central monopole. The diffusion coefficients are calculated and written in terms of a ¿potential¿ similar to the usual Rosenbluth potentials. In this case, we consider that the particles follow a Gaussian distribution. We solve the 1-dimensional Fokker-
Planck equation for the ring particles distribution function using the finite difference method (implicit Euler version). We show that the ring is a stable configuration for long time evolutions in the absence or in the presence of shepherds. We also studied the change in the mass density of the ring for different configurations. In all of the cases, it is observed a maximum negative variation of the density near the location of the shepherd due to dynamical effects
Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Ujevic Tonino, Maximiliano (advisor), Tonino, Maximiliano Ujevic (advisor), Ramos Caro, Javier Fernando (coadvisor), Chinellato, Carola Dobrigkeit, 1952- (coadvisor), Universidade Estadual de Campinas. Instituto de Física Gleb Wataghin (institution), Programa de Pós-Graduação em Física (nameofprogram), Antonelli, Alex (committee member), Koning, Maurice de (committee member), Zanchin, Vilson Tonin (committee member), Lugones, German (committee member).
Subjects/Keywords: Planetas e satélites; Anéis planetários; Mecânica celeste; Fokker-Planck, Equação de; Planets and satellites; Planetary rings; Celestial mechanics; Fokker-Planck equation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Alarcon LLacctarimay, Cesar Juan, 1. (2012). Modelagem da distribuição de matéria em um anel em presença de Shepherds, via equação de Fokker-Planck: Modeling the distribution of matter in a ring in the presence of sheperds, via Fokker-Planck equation. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/278457
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):
Alarcon LLacctarimay, Cesar Juan, 1982-. “Modelagem da distribuição de matéria em um anel em presença de Shepherds, via equação de Fokker-Planck: Modeling the distribution of matter in a ring in the presence of sheperds, via Fokker-Planck equation.” 2012. Thesis, Universidade Estadual de Campinas. Accessed January 17, 2021.
http://repositorio.unicamp.br/jspui/handle/REPOSIP/278457.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Alarcon LLacctarimay, Cesar Juan, 1982-. “Modelagem da distribuição de matéria em um anel em presença de Shepherds, via equação de Fokker-Planck: Modeling the distribution of matter in a ring in the presence of sheperds, via Fokker-Planck equation.” 2012. Web. 17 Jan 2021.
Vancouver:
Alarcon LLacctarimay, Cesar Juan 1. Modelagem da distribuição de matéria em um anel em presença de Shepherds, via equação de Fokker-Planck: Modeling the distribution of matter in a ring in the presence of sheperds, via Fokker-Planck equation. [Internet] [Thesis]. Universidade Estadual de Campinas; 2012. [cited 2021 Jan 17].
Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/278457.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Alarcon LLacctarimay, Cesar Juan 1. Modelagem da distribuição de matéria em um anel em presença de Shepherds, via equação de Fokker-Planck: Modeling the distribution of matter in a ring in the presence of sheperds, via Fokker-Planck equation. [Thesis]. Universidade Estadual de Campinas; 2012. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/278457
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université de Grenoble
13.
Hurier, Guillaume.
Etude des amas de galaxies avec l'expérience PLANCK, via l'effet Sunyaev-Zel'dovich : The Sunyaev-Zel'dovich effect from galaxy clusters with the PLANCK satellite.
Degree: Docteur es, Physique, 2012, Université de Grenoble
URL: http://www.theses.fr/2012GRENY079
► Cette thèse se focalise sur l'étude des amas de galaxies, via l'effet Sunyaev-Zel'dovich (tSZ), qui consiste en l'interaction de ces même amas avec le fond…
(more)
▼ Cette thèse se focalise sur l'étude des amas de galaxies, via l'effet Sunyaev-Zel'dovich (tSZ), qui consiste en l'interaction de ces même amas avec le fond diffus cosmologique. Pour ce faire j'ai utilisé les données expérimentale de l'instrument HFI du satellite PLANCK. Cette thèse ce découpe en trois parties majeures, (1) L'analyse et le traitement des données en temps, des données brut jusqu'au cartes du ciel, ce focalisant tout particulièrement sur les effets systématiques. (2) Le développement de méthode de séparation de sources, permettant la construction de cartes par émission astrophysique (tout particulièrement l'effet Sunyaev-Zel-dovich) à partir de données multi-fréquences. (3) L'analyse physique des cartes d'effet Sunyaev-Zel'dovich, produit par le gaz d'électron chaud présent dans les amas de galaxies. Ce travail permet la mise en place de contrainte, sur le profile de pression des amas de galaxies, sur la présence de filaments de matière entre des système binaire d'amas de galaxies, ainsi que la mise en évidence du spectre de puissance de l'effet tSZ.
This work is focusing on the study of the thermal Sunyaev-Zel'dovich (tSZ) effect produced by the gaz of hot electrons present in galaxy clusters. This effect consist on the interaction between the Cosmic Microwave Background (CMB) and galaxiy clusters. For this purpuse I used the data from the High Frequency Instrument (HFI) of the PLANCK satellite. This work can be divided in three main parts : (1) The study of systématics effects present in the Time Ordered Data and in the construction of the sky maps. (2) The devellopement of new components seperation methods for the tSZ effect in the context of multi-frequencies observations. (3) The physical analysis of the tSZ effect providing constraints on the galaxy clusters properties. This work allow to put some constraints on the galaxy clusters pressure profile, on the WHIM components present in the inter-clusters medium between binary system of galaxy clusters and on the detection of the tSZ power spectrum with PLANCK.
Advisors/Committee Members: Macias-Pérez, Juan-Francisco (thesis director), Désert, François-Xavier (thesis director).
Subjects/Keywords: Sunyaev-Zel'dovich; PLANCK; CMB; Amas de galaxies; Cosmologie; Sunyaev-Zel'dovich; PLANCK; CMB; Galaxy clusters; Cosmology; 530
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Hurier, G. (2012). Etude des amas de galaxies avec l'expérience PLANCK, via l'effet Sunyaev-Zel'dovich : The Sunyaev-Zel'dovich effect from galaxy clusters with the PLANCK satellite. (Doctoral Dissertation). Université de Grenoble. Retrieved from http://www.theses.fr/2012GRENY079
Chicago Manual of Style (16th Edition):
Hurier, Guillaume. “Etude des amas de galaxies avec l'expérience PLANCK, via l'effet Sunyaev-Zel'dovich : The Sunyaev-Zel'dovich effect from galaxy clusters with the PLANCK satellite.” 2012. Doctoral Dissertation, Université de Grenoble. Accessed January 17, 2021.
http://www.theses.fr/2012GRENY079.
MLA Handbook (7th Edition):
Hurier, Guillaume. “Etude des amas de galaxies avec l'expérience PLANCK, via l'effet Sunyaev-Zel'dovich : The Sunyaev-Zel'dovich effect from galaxy clusters with the PLANCK satellite.” 2012. Web. 17 Jan 2021.
Vancouver:
Hurier G. Etude des amas de galaxies avec l'expérience PLANCK, via l'effet Sunyaev-Zel'dovich : The Sunyaev-Zel'dovich effect from galaxy clusters with the PLANCK satellite. [Internet] [Doctoral dissertation]. Université de Grenoble; 2012. [cited 2021 Jan 17].
Available from: http://www.theses.fr/2012GRENY079.
Council of Science Editors:
Hurier G. Etude des amas de galaxies avec l'expérience PLANCK, via l'effet Sunyaev-Zel'dovich : The Sunyaev-Zel'dovich effect from galaxy clusters with the PLANCK satellite. [Doctoral Dissertation]. Université de Grenoble; 2012. Available from: http://www.theses.fr/2012GRENY079
14.
Verdier, Loïc.
Détection de structures par combinaison des données Planck et BOSS et détection simultanée d’amas de galaxies dans les données Planck et ROSAT : Detection of structures by combining Planck and BOSS data and simultaneous detection of galaxy clusters in Planck and ROSAT data.
Degree: Docteur es, Astroparticules et cosmologie, 2016, Université Paris-Saclay (ComUE)
URL: http://www.theses.fr/2016SACLS192
► Issus de l'effondrement gravitationnel des fluctuations de matière primordiales, les amas de galaxies sont constitués d'un halo de matière noire, d'un plasma de baryon ou…
(more)
▼ Issus de l'effondrement gravitationnel des fluctuations de matière primordiales, les amas de galaxies sont constitués d'un halo de matière noire, d'un plasma de baryon ou « gaz chaud » et de galaxies. Le comptage des amas apporte des contraintes fortes sur la cosmologie.Mon travail consiste à améliorer la détection de la composante de gaz chaud des amas, à la fois pour des structures proches et lointaines. Ce gaz chaud est détectable dans les cartes du satellite Planck par effet Sunyaev-Zel'dovich et dans les cartes du satellite ROSAT par rayonnement de freinage.La première partie de cette thèse consiste à détecter du gaz chaud dans les cartes de Planck à la position des quasars de l'expérience BOSS, donc dans des structures lointaines.Le signal est dominé par une émission de type poussière. J'ai donc élaboré un filtre capable d'extraire un signal de gaz chaud sous-dominant et de le séparer de l'émission de poussière. Le signal de gaz chaud obtenu par cette approche est significatif pour les structures à redshift z >2.5.La seconde partie de cette thèse, la détection simultanée, est dédiée à la construction d'un filtre capable d'extraire des amas (à z<1.5) individuellement dans les données ROSAT et adapté à la statistique du bruit. Ce filtre est en outre conçu dans la perspective d'être combiné avec le filtre utilisé pour détecter les amas dans les données Planck. L'objectif final étant d'obtenir plus d'amas moins massifs.
Originating from the gravitational collapse of the primordial fluctuations of matter, galaxy clusters are the mixture of a dark matter halo, a baryonic plasma also called « hot gas » and several galaxies. Cluster counts provide stringent constraints on cosmology.Improving the detection of the hot gas component in nearby or distant structures is the main goal of my work. We can detect this hot gas in the Planck satellite maps thanks to the Sunyaev-Zel'dovich effect and in the ROSAT satellite maps by bremsstrahlung.The first part of my thesis is dedicated to the detection of hot gas in Planck maps at the positions of BOSS quasars, so in distant structures.Dust-like emission dominates our signal. I developped a new filter in order to separate the possible sub-dominant hot gas emision from the dust one. I get a significnt hot gas signal for structures with redshift z >2.5.In the second part of the thesis, the simultaneous detection, I build a filter suited for extracting clusters (z<1.5) individually in the ROSAT data respecting the noise statitistics. This filter is also designed to be combined with the filter used for detecting clusters in Planck maps. Increasing the number of less massive clusters will be the final goal.
Advisors/Committee Members: Melin, Jean-Baptiste (thesis director).
Subjects/Keywords: Cosmologie; Amas de galaxies; Filtrage; Planck; Sdss-Boss; Rosat; Cosmology; Galaxy clusters; Filtering; Planck; Sdss-Boss; Rosat
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Verdier, L. (2016). Détection de structures par combinaison des données Planck et BOSS et détection simultanée d’amas de galaxies dans les données Planck et ROSAT : Detection of structures by combining Planck and BOSS data and simultaneous detection of galaxy clusters in Planck and ROSAT data. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2016SACLS192
Chicago Manual of Style (16th Edition):
Verdier, Loïc. “Détection de structures par combinaison des données Planck et BOSS et détection simultanée d’amas de galaxies dans les données Planck et ROSAT : Detection of structures by combining Planck and BOSS data and simultaneous detection of galaxy clusters in Planck and ROSAT data.” 2016. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed January 17, 2021.
http://www.theses.fr/2016SACLS192.
MLA Handbook (7th Edition):
Verdier, Loïc. “Détection de structures par combinaison des données Planck et BOSS et détection simultanée d’amas de galaxies dans les données Planck et ROSAT : Detection of structures by combining Planck and BOSS data and simultaneous detection of galaxy clusters in Planck and ROSAT data.” 2016. Web. 17 Jan 2021.
Vancouver:
Verdier L. Détection de structures par combinaison des données Planck et BOSS et détection simultanée d’amas de galaxies dans les données Planck et ROSAT : Detection of structures by combining Planck and BOSS data and simultaneous detection of galaxy clusters in Planck and ROSAT data. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2016. [cited 2021 Jan 17].
Available from: http://www.theses.fr/2016SACLS192.
Council of Science Editors:
Verdier L. Détection de structures par combinaison des données Planck et BOSS et détection simultanée d’amas de galaxies dans les données Planck et ROSAT : Detection of structures by combining Planck and BOSS data and simultaneous detection of galaxy clusters in Planck and ROSAT data. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2016. Available from: http://www.theses.fr/2016SACLS192
15.
Miniussi, Antoine.
Étude et modélisation de l’interaction des particules cosmiques avec les détecteurs cryogéniques de l'astronomie submillimétrique et X : Study and modeling of cosmic ray interaction with cryogenic detectors for submillimeter and X-ray space astronomy.
Degree: Docteur es, Sciences de l'Univers, 2015, Université Paris-Saclay (ComUE)
URL: http://www.theses.fr/2015SACLS004
► Les particules cosmiques sont émises par différentes sources galactiques et sont composées de protons et de noyaux d'hélium. Ces éléments interagissent avec les matériaux et…
(more)
▼ Les particules cosmiques sont émises par différentes sources galactiques et sont composées de protons et de noyaux d'hélium. Ces éléments interagissent avec les matériaux et y déposent leur énergie par interaction nucléaire. L'instrument Planck/HFI a observé le ciel depuis l'espace dans le but de cartographier le fond diffus cosmologique. Pour cela, HFI embarque un plan focal refroidit à 100 mK composé de 54 bolomètres. Le flux de particules cosmiques, interagissant avec les composants des détecteurs (thermomètre, grille, wafer), chauffe ponctuellement les capteurs (glitches) ce qui entraine une dégradation du signal scientifique. Leur étude a révélé un autre effet thermique caractérisé par un chauffage global du plan focal de l'ordre du microkelvin, les High Coincidence Events (HCE). Deux familles de HCE ont été isolées dans les données : les rapides, générés par des gerbes de particules secondaires formées dans les couches externes du satellite et interagissant avec l'ensemble de l'instrument HFI ; les lents, généré par la vaporisation d'hélium formant un lien thermique ponctuel entre le plan focal et l'étage à 1,6 K lui faisant face. L'exposition d'une matrice de bolomètres TES à une source de particules α a démontré une réponse similaire mais également des glitches simultanés entre les pixels.Ces recherches démontrent que les particules cosmiques et les gerbes de particules doivent être étudiées afin d'éviter des effets thermiques prédominant. Le développement des prochaines générations de détecteurs, devront ainsi prendre en compte ces interactions indissociables d'une mission spatiale et s'en prémunir.
Cosmic rays are emitted from different galactic sources and consist of protons and helium nuclei. These elements interact with matter and deposit part of their energy by nuclear interaction.The Planck/HFI instrument observed the sky from space to map the Cosmic Microwave Background. For this purpose, HFI has a focal plane cool down to 100 mK and composed of 54 bolometers. The interactions of the cosmic ray flux with the detectors' components (thermometer, grid and wafer) heat up regularly the sensor (glitches) which leads to a degradation of the scientific signal. Studying them revealed another thermal effect characterized by a thermal increase of the entire focal plane up to the microkelvin range, the High Coincidence Events (HCE).Two HCE famillies were separated: the fast ones, generated by cosmic ray showers developed in the external layers of the satellite and interacting with the entire HFI instrument and the slow ones, generated by the vaporisation of helium forming a ponctual thermal link between the focal plane and the 1.6 K stage facing it.Exposure of a TES bolometer matrix to an α particules source showed a similar response but also simultaneous glitches on several pixels. This work demonstrates that cosmic rays and particle showers on next low temperature experiments has to be studied to prevent predominating thermal effects from it. The developpement of futur space experiments will have to take…
Advisors/Committee Members: Pajot, François (thesis director).
Subjects/Keywords: Particule cosmique; Bolomètre; Tes; Helium; Cryogénie; Planck/HFI; Cosmic ray; Bolometer; Tes; Helium; Cryogenics; Planck/HFI
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Miniussi, A. (2015). Étude et modélisation de l’interaction des particules cosmiques avec les détecteurs cryogéniques de l'astronomie submillimétrique et X : Study and modeling of cosmic ray interaction with cryogenic detectors for submillimeter and X-ray space astronomy. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2015SACLS004
Chicago Manual of Style (16th Edition):
Miniussi, Antoine. “Étude et modélisation de l’interaction des particules cosmiques avec les détecteurs cryogéniques de l'astronomie submillimétrique et X : Study and modeling of cosmic ray interaction with cryogenic detectors for submillimeter and X-ray space astronomy.” 2015. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed January 17, 2021.
http://www.theses.fr/2015SACLS004.
MLA Handbook (7th Edition):
Miniussi, Antoine. “Étude et modélisation de l’interaction des particules cosmiques avec les détecteurs cryogéniques de l'astronomie submillimétrique et X : Study and modeling of cosmic ray interaction with cryogenic detectors for submillimeter and X-ray space astronomy.” 2015. Web. 17 Jan 2021.
Vancouver:
Miniussi A. Étude et modélisation de l’interaction des particules cosmiques avec les détecteurs cryogéniques de l'astronomie submillimétrique et X : Study and modeling of cosmic ray interaction with cryogenic detectors for submillimeter and X-ray space astronomy. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2015. [cited 2021 Jan 17].
Available from: http://www.theses.fr/2015SACLS004.
Council of Science Editors:
Miniussi A. Étude et modélisation de l’interaction des particules cosmiques avec les détecteurs cryogéniques de l'astronomie submillimétrique et X : Study and modeling of cosmic ray interaction with cryogenic detectors for submillimeter and X-ray space astronomy. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2015. Available from: http://www.theses.fr/2015SACLS004

Université Paris-Sud – Paris XI
16.
Guery, David.
Étude statistique des structures à grand redshift observées par les satellites Planck et Herschel : Statistical study of high redshift sources observed by Planck and Herschel satellites.
Degree: Docteur es, Physique, 2015, Université Paris-Sud – Paris XI
URL: http://www.theses.fr/2015PA112162
► Les modèles et les observations actuels de l’Univers sont en accords aux grandes échelles. Néanmoins, cela ne permet pas d’expliquer la formation des structures baryoniques…
(more)
▼ Les modèles et les observations actuels de l’Univers sont en accords aux grandes échelles. Néanmoins, cela ne permet pas d’expliquer la formation des structures baryoniques dans l’Univers. Afin de contraindre la formation des structures dans l’Univers, des observations sont nécessaires à différents redshifts pour observer les structures à différentes étapes d’évolutions. Le satellite Planck donne accès à des objets dont les redshifts sont compris entre z=2 et z=4. Ainsi environ 1200 objets extragalactiques susceptibles d’être à haut redshift sont détectés dans 26% du ciel, autour des pôles galactiques. Un sous échantillon de 228 sources est observé à plus grande sensibilité et résolution angulaire avec le satellite Herschel. Grâce à ces observations je peux résoudre les sources ponctuelles de Planck en plusieurs sources Herschel. J’identifie alors trois possibilités de type de sources, soit c’est une candidate de source amplifiée par lentillage gravitationnel, soit c’est un candidat d’amas de galaxies à haut redshift, soit c’est un alignement de sources fortuit le long de la ligne de visé. Après analyse, j’ai identifié dans cet échantillon 11 sources amplifiées par lentillage gravitationnel parmi les plus brillantes du ciel sub-millimétrique. Ces sources ont des redshifts compris entre z=2.2 et z=3.6 (Canameras et al., 2015) et permettent de sonder la formation stellaire dans l’Univers lointain. Il reste 217 surdensités de sources que j’ai étudié. En utilisant la couleur des sources Herschel, j’ai calculé une estimation de la densité des sources. 50% des champs Herschel de l’échantillon on une surdensité supérieur à 10sigma lorsque l’on sélectionne les sources rouges (S250/S350 < 1.4 et S500/S350 > 0.6). Cela montre que l’échantillon est principalement composé de surdensité de source rouge. En ajustant un corps noir modifié à 35K sur les données photométrique Herschel-SPIRE je montre que la distribution de redshift photométrique des sources piquent à z=2. Notre échantillon se compose donc de 11 sources lentillées et 217 potentiels amas de galaxies à redshift z~2. Ces potentiels amas de galaxies se compose d’en moyenne 9 sources dans 4.5’ de diamètre. Les sources individuelles ont des luminosités infrarouges d’environ 4.1012 Lsol ce qui correspond d’après Bell et al. 2003 à un taux de formation stellaire (SFR) de 700 Msol.yr-1. Cela mène pour les potentielles structures à une luminosité de 4.1013 Msol et un SFR de 7000 Msol.yr-1. Notre échantillon trace donc les structures denses du ciel à fort taux de formation stellaire. Cet échantillon sera donc clé dans la compréhension de la formation des structures et des étoiles à des redshifts autour de z=2.
Actual models and observations of the Universe agreed at large scale. But the formation of baryonic structures remains unknown. To constrain structure formation in the Universe, observatoins are needed at different redshift to see different evolution steps. Planck satellite gives an acces to objetcs in the redshift range z=2 to z=4. Thus we detect about 1200…
Advisors/Committee Members: Dole, Hervé (thesis director).
Subjects/Keywords: Astrophysique; Galaxies infrarouges; Haut redshift; Planck; Herschel; Formation des structures; Astrophysics; Infrared galaxies; High redshift; Planck; Herschel; Structure formation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Guery, D. (2015). Étude statistique des structures à grand redshift observées par les satellites Planck et Herschel : Statistical study of high redshift sources observed by Planck and Herschel satellites. (Doctoral Dissertation). Université Paris-Sud – Paris XI. Retrieved from http://www.theses.fr/2015PA112162
Chicago Manual of Style (16th Edition):
Guery, David. “Étude statistique des structures à grand redshift observées par les satellites Planck et Herschel : Statistical study of high redshift sources observed by Planck and Herschel satellites.” 2015. Doctoral Dissertation, Université Paris-Sud – Paris XI. Accessed January 17, 2021.
http://www.theses.fr/2015PA112162.
MLA Handbook (7th Edition):
Guery, David. “Étude statistique des structures à grand redshift observées par les satellites Planck et Herschel : Statistical study of high redshift sources observed by Planck and Herschel satellites.” 2015. Web. 17 Jan 2021.
Vancouver:
Guery D. Étude statistique des structures à grand redshift observées par les satellites Planck et Herschel : Statistical study of high redshift sources observed by Planck and Herschel satellites. [Internet] [Doctoral dissertation]. Université Paris-Sud – Paris XI; 2015. [cited 2021 Jan 17].
Available from: http://www.theses.fr/2015PA112162.
Council of Science Editors:
Guery D. Étude statistique des structures à grand redshift observées par les satellites Planck et Herschel : Statistical study of high redshift sources observed by Planck and Herschel satellites. [Doctoral Dissertation]. Université Paris-Sud – Paris XI; 2015. Available from: http://www.theses.fr/2015PA112162
17.
Cartailler, Jérôme.
Asymptotic of Poisson-Nernst-Planck equations and application to the voltage distribution in cellular micro-domains : Equations de Poisson-Nernst-Planck asymptotiques et application à la distribution de tension dans des mico-domaines cellulaires.
Degree: Docteur es, Mathématiques Appliquées, 2017, Université Pierre et Marie Curie – Paris VI
URL: http://www.theses.fr/2017PA066297
► Dans cette thèse j’étudie l’impact de la géométrie de micro et nano-domaines biologiques sur les propriétés d'électrodiffusion, ceci à l'aide des équations aux dérivées partielles…
(more)
▼ Dans cette thèse j’étudie l’impact de la géométrie de micro et nano-domaines biologiques sur les propriétés d'électrodiffusion, ceci à l'aide des équations aux dérivées partielles de Poisson-Nernst-Planck. Je considère des domaines non-triviaux ayant une forme cuspide ou elliptique. Mon objectif est de développer des modèles ainsi que des méthodes mathématiques afin d'étudier les caractéristiques électriques de ces nano/micro-domaines, et ainsi mieux comprendre comment les signaux électriques sont modulés à ces échelles. Dans la première partie j’étudie le voltage à l'équilibre pour un électrolyte dans un domaine borné, et ayant un fort excès de charges positives. Je montre que le premier temps de sortie dans une boule chargée dépend de la surface et non du volume. J’étudie ensuite la géométrie composées d'une boule à laquelle est attachée un domaine cuspide. Je construis ensuite une solution asymptotique pour le voltage dans les cas 2D et 3D et je montre qu’ils sont donnés au premier ordre par la même expression. Enfin, j’obtiens la même conclusion en considérant une géométrie formée d'une ellipse, dont je construis une solution asymptotique du voltage en 2D et 3D. La seconde partie porte sur la modélisation de la compartimentalisation électrique des épines dendritiques. A partir de simulations numériques, je mets en évidence le lien entre la polarisation de concentration dans l'épine et sa géométrie. Je compare ensuite mon modèle à des données de microscopie. Je développe une méthode de déconvolution pour extraire la dynamique rapide du voltage à partir des données de microscopie. Enfin j’estime la résistance du cou et montre que celle-ci ne suit pas la loi d'Ohm.
In this PhD I study how electro-diffusion within biological micro and nano-domains is affected by their shapes using the Poisson-Nernst-Planck (PNP) partial differential equations. I consider non-trivial shapes such as domains with cusp and ellipses. Our goal is to develop models, as well as mathematical tools, to study the electrical properties of micro and nano-domains, to understand better how electrical neuronal signaling is regulated at those scales. In the first part I estimate the steady-state voltage inside an electrolyte confined in a bounded domain, within which we assume an excess of positive charge. I show the mean first passage time in a charged ball depends on the surface and not on the volume. I further study a geometry composed of a ball with an attached cusp-shaped domain. I construct an asymptotic solution for the voltage in 2D and 3D and I show that to leading order expressions for the voltage in 2D and 3D are identical. Finally, I obtain similar conclusion considering an elliptical-shaped domain for which I construct an asymptotic solution for the voltage in 2D and 3D. In the second part, I model the electrical compartmentalization in dendritic spines. Based on numerical simulations, I show how spines non-cylindrical geometry leads to concentration polarization effects. I then compare my model to experimental data of microscopy…
Advisors/Committee Members: Holcman, David (thesis director).
Subjects/Keywords: Poisson-Nernst-Planck; Electrodiffusion; Transformation conformes; Schwartz-Christoffel; Möbius; EDP non-Lineaire; Polarisation de concentration; Poisson-Nernst-Planck; Electrodiffusion; Asymptotic; 510
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cartailler, J. (2017). Asymptotic of Poisson-Nernst-Planck equations and application to the voltage distribution in cellular micro-domains : Equations de Poisson-Nernst-Planck asymptotiques et application à la distribution de tension dans des mico-domaines cellulaires. (Doctoral Dissertation). Université Pierre et Marie Curie – Paris VI. Retrieved from http://www.theses.fr/2017PA066297
Chicago Manual of Style (16th Edition):
Cartailler, Jérôme. “Asymptotic of Poisson-Nernst-Planck equations and application to the voltage distribution in cellular micro-domains : Equations de Poisson-Nernst-Planck asymptotiques et application à la distribution de tension dans des mico-domaines cellulaires.” 2017. Doctoral Dissertation, Université Pierre et Marie Curie – Paris VI. Accessed January 17, 2021.
http://www.theses.fr/2017PA066297.
MLA Handbook (7th Edition):
Cartailler, Jérôme. “Asymptotic of Poisson-Nernst-Planck equations and application to the voltage distribution in cellular micro-domains : Equations de Poisson-Nernst-Planck asymptotiques et application à la distribution de tension dans des mico-domaines cellulaires.” 2017. Web. 17 Jan 2021.
Vancouver:
Cartailler J. Asymptotic of Poisson-Nernst-Planck equations and application to the voltage distribution in cellular micro-domains : Equations de Poisson-Nernst-Planck asymptotiques et application à la distribution de tension dans des mico-domaines cellulaires. [Internet] [Doctoral dissertation]. Université Pierre et Marie Curie – Paris VI; 2017. [cited 2021 Jan 17].
Available from: http://www.theses.fr/2017PA066297.
Council of Science Editors:
Cartailler J. Asymptotic of Poisson-Nernst-Planck equations and application to the voltage distribution in cellular micro-domains : Equations de Poisson-Nernst-Planck asymptotiques et application à la distribution de tension dans des mico-domaines cellulaires. [Doctoral Dissertation]. Université Pierre et Marie Curie – Paris VI; 2017. Available from: http://www.theses.fr/2017PA066297
18.
Hasan, A. B. M. Shamim Ul.
Simulation and theoretical analysis for stochastic dynamics of biochemical networks : 生化学ネットワークの確率論的ダイナミクスのシミュレーションと理論解析.
Degree: 博士(情報工学), 2018, Kyushu Institute of Technology / 九州工業大学
URL: http://hdl.handle.net/10228/00006536
► Stochasticity in gene regulatory network has become increasingly distinguished in the current thinking of system biology. So it is important to know the variety of…
(more)
▼ Stochasticity in gene regulatory network has become increasingly distinguished in the current thinking of system biology. So it is important to know the variety of noise in gene regulatory network. Here, we constructed different types of gene regulatory networks, two-gene regulated mutual activation network of positive feedback; two-gene regulated mutual repression network of positive feedback. We have investigated the dynamical behavior of noise i.e. noise induced bistable (bimodal), multistable (multimodal) of this gene regulatory networks in deterministic and stochastic approaches at the steady state level. Also, we have investigated the one gene with respect to another one in both deterministic, stochastic environments with non-cooperative transcription factor binding / unbinding on the promoter region by using non-symmetric kinetic parameters to predict the bimodal and multimodal gene expression.On the other hand, biological memory is a ubiquitous function that can generate a sustained response to a transient inductive stimulus. To better understand this function, we must consider the mechanisms by which different structures of genetic networks achieve memory. Here, we investigated two competitive gene regulatory network models: the regulated mutual activation network (MAN) and the regulated mutual repression network (MRN). Stochasticity deteriorated the memory function of both the MAN and the MRN models.Theoretical analysis was performed to support the simulation results. We exemplified the stochastic potential profile of the one-variable rate equation deriving from the MAN and MRN models. In the presence of noise, a stochastic potential and the mean first-time passage (MFTP) are used to investigate bistability and memory persistency by the Fokker-
Planck equation (FPE), which is derived from the chemical Langevin equation.Mathematical comparison by simulation and theoretical analysis identified functional differences in the stochastic memory between the competitive models: specifically, the MAN provided much more robust, persistent memory than the MRN. The stochastic memory pattern of the MAN can be adjusted by changing the binding strength of the activators, whereas the MRN required highly cooperative and strong binding repressors for robust memory.Therefore, we should select the MAN or MRN for an optimal, rational design. If a robust memory is required, a mutual activation network should be selected. If the opposite state of protein synthesis is necessary, a mutual repression network must be selected, although the memory effect is fragile. This fragility may be related to the fact that suppression cascades amplify noise compared with activation cascades. A mutual activation network comprising two protein kinases, p42 MAPK and Cdc2, is suggested to require robust memory. On the other hand, a mutual repression network comprising the cI and Cro proteins would require a gene expression system opposite to that of robust memory. A Notch-Delta mutual repression network is an intelligible example to communicate…
Advisors/Committee Members: 倉田, 博之.
Subjects/Keywords: Genetic noise; Cooperativity; Bistability; Memory; Fokker-Planck; Potential profile
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APA (6th Edition):
Hasan, . A. B. M. S. U. (2018). Simulation and theoretical analysis for stochastic dynamics of biochemical networks : 生化学ネットワークの確率論的ダイナミクスのシミュレーションと理論解析. (Thesis). Kyushu Institute of Technology / 九州工業大学. Retrieved from http://hdl.handle.net/10228/00006536
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):
Hasan, A B M Shamim Ul. “Simulation and theoretical analysis for stochastic dynamics of biochemical networks : 生化学ネットワークの確率論的ダイナミクスのシミュレーションと理論解析.” 2018. Thesis, Kyushu Institute of Technology / 九州工業大学. Accessed January 17, 2021.
http://hdl.handle.net/10228/00006536.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hasan, A B M Shamim Ul. “Simulation and theoretical analysis for stochastic dynamics of biochemical networks : 生化学ネットワークの確率論的ダイナミクスのシミュレーションと理論解析.” 2018. Web. 17 Jan 2021.
Vancouver:
Hasan ABMSU. Simulation and theoretical analysis for stochastic dynamics of biochemical networks : 生化学ネットワークの確率論的ダイナミクスのシミュレーションと理論解析. [Internet] [Thesis]. Kyushu Institute of Technology / 九州工業大学; 2018. [cited 2021 Jan 17].
Available from: http://hdl.handle.net/10228/00006536.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hasan ABMSU. Simulation and theoretical analysis for stochastic dynamics of biochemical networks : 生化学ネットワークの確率論的ダイナミクスのシミュレーションと理論解析. [Thesis]. Kyushu Institute of Technology / 九州工業大学; 2018. Available from: http://hdl.handle.net/10228/00006536
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University
19.
Larson, Richard Ross.
A photoelectric cell and allied equipment for student determination of Planck's constant.
Degree: MS, Physics, 1949, Oregon State University
URL: http://hdl.handle.net/1957/53047
Subjects/Keywords: Planck; M. (Max); 1822-1900
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APA (6th Edition):
Larson, R. R. (1949). A photoelectric cell and allied equipment for student determination of Planck's constant. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/53047
Chicago Manual of Style (16th Edition):
Larson, Richard Ross. “A photoelectric cell and allied equipment for student determination of Planck's constant.” 1949. Masters Thesis, Oregon State University. Accessed January 17, 2021.
http://hdl.handle.net/1957/53047.
MLA Handbook (7th Edition):
Larson, Richard Ross. “A photoelectric cell and allied equipment for student determination of Planck's constant.” 1949. Web. 17 Jan 2021.
Vancouver:
Larson RR. A photoelectric cell and allied equipment for student determination of Planck's constant. [Internet] [Masters thesis]. Oregon State University; 1949. [cited 2021 Jan 17].
Available from: http://hdl.handle.net/1957/53047.
Council of Science Editors:
Larson RR. A photoelectric cell and allied equipment for student determination of Planck's constant. [Masters Thesis]. Oregon State University; 1949. Available from: http://hdl.handle.net/1957/53047

Universidade Estadual de Campinas
20.
Samogin, Eunice d'Avila.
Brecha espectral na geração de corrente por onda híbrida inferior.
Degree: 1997, Universidade Estadual de Campinas
URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/278556
► Abstract: Current drive by lower hybrid wave LH, is the most promising technique to obtain continuos current for the controlled thermonuclear fusion. The existence of…
(more)
▼ Abstract: Current drive by lower hybrid wave LH, is the most promising technique to obtain continuos current for the controlled thermonuclear fusion. The existence of "Spectral gap" forbid satisfactory match between theoretical results and experimental measurements of the generated current. The theory has always predicted smaller values. In this Thesis we show a possible solution for the spectral gap, by a numerical code which calculate the generated current by LH waves, using the "Quasi1inear Fokker-
Planck" equation in two dimensions, taking in to account detai1s of ressonance between particles and the longitudinal LH waves and its spectral distribution
Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Sakanaka, Paulo Hiroshi, 1938- (advisor), Universidade Estadual de Campinas. Instituto de Física Gleb Wataghin (institution), Programa de Pós-Graduação em Física (nameofprogram), Azevedo, Carlos Augusto de (committee member), Assis, Altair de Souza (committee member), Busnardo Neto, José (committee member), Machida, Munemasa (committee member).
Subjects/Keywords: Fokker-Planck, Equação de; Tokamaks
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Samogin, E. d. (1997). Brecha espectral na geração de corrente por onda híbrida inferior. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/278556
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):
Samogin, Eunice d'Avila. “Brecha espectral na geração de corrente por onda híbrida inferior.” 1997. Thesis, Universidade Estadual de Campinas. Accessed January 17, 2021.
http://repositorio.unicamp.br/jspui/handle/REPOSIP/278556.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Samogin, Eunice d'Avila. “Brecha espectral na geração de corrente por onda híbrida inferior.” 1997. Web. 17 Jan 2021.
Vancouver:
Samogin Ed. Brecha espectral na geração de corrente por onda híbrida inferior. [Internet] [Thesis]. Universidade Estadual de Campinas; 1997. [cited 2021 Jan 17].
Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/278556.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Samogin Ed. Brecha espectral na geração de corrente por onda híbrida inferior. [Thesis]. Universidade Estadual de Campinas; 1997. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/278556
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade de Brasília
21.
Marcio Tavares de Castro.
Equações de difusão associadas a séries temporais estocásticas : Kramers-Moyal versus Fokker-Planck.
Degree: 2009, Universidade de Brasília
URL: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4853
► Equac~oes de difus~ao s~ao largamente utilizadas na obtenc~ao de propriedades de series temporais estocasticas. O objetivo principal deste trabalho e determinar os processos pelos quais…
(more)
▼ Equac~oes de difus~ao s~ao largamente utilizadas na obtenc~ao de propriedades de series temporais estocasticas. O objetivo principal deste trabalho e determinar os processos pelos quais uma equac~ao de difus~ao deve ser modelada por uma expans~ao de Kramers-Moyal ou por uma equac~ao de Fokker-
Planck. Este estudo sera feito atraves da utilizac~ao de func~oes caractersticas em sua forma can^onica e da chamada func~ao de Levy, introduzida pelo matematico franc^es Paul Levy para medir a dist^ancia de distribuic~oes para uma gaussiana. Vericaremos como a converg^encia de distribuic~oes de variaveis aleatorias in- uencia a escolha do tipo de equac~ao difusiva a ser adotada. Veremos que os conceitos de auto-similiridade e continuidade em distribuic~ao na analise de variaveis aleatorias s~ao determinantes na obtenc~ao das propriedades difusivas de um sistema estocastico. Em particular, estudaremos o movimento Browniano modelado por mapas lineares com rudo aleatorio. Daremos bastante ^enfase ao papel do rudo ao mostrar, analiticamente e computacionalmente, que sua forma in ui no tipo de difus~ao apresentado pelo sistema. Como perspectiva de trabalho, enfocaremos a possibilidade de utilizac~ao de equac~oes difusivas na modelagem de series nanceiras.
Advisors/Committee Members: Tarcísio Marciano da Rocha Filho, Annibal Dias de Figueiredo Neto, Iram Marcelo Gléria.
Subjects/Keywords: processos estocásticos; equação de difusão; Kramers-Moyal; Fokker-Planck; FISICA
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Castro, M. T. d. (2009). Equações de difusão associadas a séries temporais estocásticas : Kramers-Moyal versus Fokker-Planck. (Thesis). Universidade de Brasília. Retrieved from http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4853
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):
Castro, Marcio Tavares de. “Equações de difusão associadas a séries temporais estocásticas : Kramers-Moyal versus Fokker-Planck.” 2009. Thesis, Universidade de Brasília. Accessed January 17, 2021.
http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4853.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Castro, Marcio Tavares de. “Equações de difusão associadas a séries temporais estocásticas : Kramers-Moyal versus Fokker-Planck.” 2009. Web. 17 Jan 2021.
Vancouver:
Castro MTd. Equações de difusão associadas a séries temporais estocásticas : Kramers-Moyal versus Fokker-Planck. [Internet] [Thesis]. Universidade de Brasília; 2009. [cited 2021 Jan 17].
Available from: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4853.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Castro MTd. Equações de difusão associadas a séries temporais estocásticas : Kramers-Moyal versus Fokker-Planck. [Thesis]. Universidade de Brasília; 2009. Available from: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4853
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University
22.
Cheng, Wen.
Approximate Solutions to Second Order Parabolic Equations with Applications to Option Pricing.
Degree: 2011, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/12454
► In this thesis, we consider second order parabolic equations with coefficients that vary both in space and in time (non-autonomous). We derive closed-form approx- imations…
(more)
▼ In this thesis, we consider second order parabolic equations with coefficients that vary both in space and in time (non-autonomous). We derive closed-form approx- imations to the associated fundamental solution by extending the Dyson-Taylor commutator method recently developed by Costantinescu, Costanzino, Mazzucato and Nistor for autonomous equations. We establish error bounds in Sobolev spaces and show that, by including enough terms, our approximation can be proven to be accurate to arbitrary high order in the short-time limit. We show how our method can give an approximation of the solution for any fixed time and within any given tolerance. To extend our results to large time, we introduce the so called boot- strap scheme, and show that the total error is still under control in this scheme, but the short time limitation can be removed. For applications, we adapt our ideas to Kolmogorov backward equations that appear in various research fields, such as option pricing. We also numerically compare our results with many other methods in the literature and show that our Dyson-Taylor Commutator method is algorithmically more elementary, it works for more general PDEs, and it gives fairly accurate approximations that are good enough in practice.
Advisors/Committee Members: Victor Nistor, Dissertation Advisor/Co-Advisor, Victor Nistor, Committee Chair/Co-Chair, Anna L Mazzucato, Committee Chair/Co-Chair, John C Liechty, Committee Member, Alexei Novikov, Committee Member.
Subjects/Keywords: Green function; Fokker Planck equation; parabolic equation; Option Pricing
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cheng, W. (2011). Approximate Solutions to Second Order Parabolic Equations with Applications to Option Pricing. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/12454
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):
Cheng, Wen. “Approximate Solutions to Second Order Parabolic Equations with Applications to Option Pricing.” 2011. Thesis, Penn State University. Accessed January 17, 2021.
https://submit-etda.libraries.psu.edu/catalog/12454.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cheng, Wen. “Approximate Solutions to Second Order Parabolic Equations with Applications to Option Pricing.” 2011. Web. 17 Jan 2021.
Vancouver:
Cheng W. Approximate Solutions to Second Order Parabolic Equations with Applications to Option Pricing. [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Jan 17].
Available from: https://submit-etda.libraries.psu.edu/catalog/12454.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cheng W. Approximate Solutions to Second Order Parabolic Equations with Applications to Option Pricing. [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/12454
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Delaware
23.
Zeng, Yun.
Mathematical modeling and stochastic simulation of soft materials.
Degree: PhD, University of Delaware, Department of Mathematical Sciences, 2014, University of Delaware
URL: http://udspace.udel.edu/handle/19716/16840
► Soft materials are all around us; they may appear as consumer products, foods, or biological materials. The interest in studying the properties of soft materials…
(more)
▼ Soft materials are all around us; they may appear as consumer products, foods, or biological materials. The interest in studying the properties of soft materials both experimentally and theoretically has steadily increased due to their wide range of industrial applications. One example of a soft material is wormlike micellar solutions. Depending on the temperature and composition, these solvent-surfactant-salt mixtures may exhibit close to mono-exponential or, alternatively, power-law or stretched-exponential stress decay. Of particular interest to this thesis is the development of stochastic models that can capture the stress relaxation behavior of such materials in the small strain limit, which is non-exponential in time as opposed to exponential. Continuous time random walk (CTRW) or subordinated Langevin processes are utilized to model systems exhibiting non-exponential relaxation behavior or anomalous diffusion. Stochastic simulations using the CTRW approach or the subordination method are carried out in this thesis for one-dimensional systems in which the probability density distribution of particle positions is described by a fractional Fokker-
Planck equation (FFPE). The equivalence of the CTRW simulation and the subordination simulation with that of the FFPE is analyzed through the simulation of an ensemble of particle trajectories. The simulated particle dynamics suggest that CTRW processes or subordinated Langevin dynamics can be included in soft material mesoscale dynamics to capture the anomalous transport. To model the non-exponential stress relaxation dynamics of soft gel systems (three-dimensional fluids), stochastic models are simulated using transient network theory as developed and combined with the CTRW and subordinated Langevin processes. This approach enables us to connect the microstructural dynamics of certain soft gel-like materials with macroscale experimental observations by examining the material properties under homogeneous shear flow conditions. The study shows that transient network models combined with CTRW or subordination processes can successfully predict the non-exponential stress relaxation dynamics of soft materials. Future work should include the understanding of this class of models for other types of flows, e.g. inhomogeneous flows, as well as inclusion of the CTRW approach in a transient network model with the network topology tracked.
Advisors/Committee Members: Cook, L. Pamela.
Subjects/Keywords: Colloids.; Stochastic models.; Random walks (Mathematics); Fokker-Planck equation.
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zeng, Y. (2014). Mathematical modeling and stochastic simulation of soft materials. (Doctoral Dissertation). University of Delaware. Retrieved from http://udspace.udel.edu/handle/19716/16840
Chicago Manual of Style (16th Edition):
Zeng, Yun. “Mathematical modeling and stochastic simulation of soft materials.” 2014. Doctoral Dissertation, University of Delaware. Accessed January 17, 2021.
http://udspace.udel.edu/handle/19716/16840.
MLA Handbook (7th Edition):
Zeng, Yun. “Mathematical modeling and stochastic simulation of soft materials.” 2014. Web. 17 Jan 2021.
Vancouver:
Zeng Y. Mathematical modeling and stochastic simulation of soft materials. [Internet] [Doctoral dissertation]. University of Delaware; 2014. [cited 2021 Jan 17].
Available from: http://udspace.udel.edu/handle/19716/16840.
Council of Science Editors:
Zeng Y. Mathematical modeling and stochastic simulation of soft materials. [Doctoral Dissertation]. University of Delaware; 2014. Available from: http://udspace.udel.edu/handle/19716/16840

University of Colorado
24.
Damrongwiriyanupap, Nattapong.
Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures.
Degree: PhD, 2010, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/35
► Chloride is one of the aggressive chemicals that can threat to reinforced concrete structures. This threat is aggravated by damage due to corrosion of…
(more)
▼ Chloride is one of the aggressive chemicals that can threat to reinforced concrete structures. This threat is aggravated by damage due to corrosion of reinforcing steel. Over the years, there have been several models related to chloride diffusion in concrete for predicting the service life of reinforced concrete structures subjected to chloride attack. These can be mathematically characterized by diffusion equation based on Fick's law and by sophisticated transport theory, the Nernst-
Planck equation. In this thesis, statistical, theoretical, and experimental studies were conducted on the penetration of deicing salts into concrete structures mainly focused on chloride-induced corrosion of reinforcement.
A statistical study presented an analytic method based on a simple solution of one-dimensional diffusion equation, Fick's law, for predicting the probabilistic features of corrosion initiation time of reinforcement in concrete structures subjected to chloride environments. A theoretical modeling was conducted to investigate ion transport in concrete described based on the physical model, the Nernst-
Planck equation, which included diffusion mechanism due to ionic concentration gradient and migration process due to electrostatic potential gradient. The model considered the transport of not only chloride ion but also other chemical species involved in the concrete pore solution such as hydroxyl, sodium, potassium, and calcium ions. Then, the model was extended to study the effect of moisture and temperature on the transport of these ions. The two coupled effects of moisture diffusion and chloride penetration; and heat flow and chloride penetration were incorporated in the mathematical model. Several numerical examples were simulated and solved by the proposed models and the obtained results agreed very well with the available test data. The results also showed the basic trends of ion transport in concrete with various initial and boundary conditions. An experimental study on multi-species aggressive chemicals diffusion in concrete was performed based on chloride ponding test. The penetration rate of different chloride-based solutions related to deicers used for ice and snow control was selected as a focus of this task. The experimental results obtained from this study showed that chloride ingress into concrete is dependent on the cations associated in solutions.
Advisors/Committee Members: Yunping Xi, Victor Saouma, George Hearn, Sivaselvan Mettupalayam, Kevin Rens.
Subjects/Keywords: chloride; concrete; deicing salts; moisture; temperature; Nernst-Planck equation; Civil Engineering
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Damrongwiriyanupap, N. (2010). Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/35
Chicago Manual of Style (16th Edition):
Damrongwiriyanupap, Nattapong. “Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures.” 2010. Doctoral Dissertation, University of Colorado. Accessed January 17, 2021.
https://scholar.colorado.edu/cven_gradetds/35.
MLA Handbook (7th Edition):
Damrongwiriyanupap, Nattapong. “Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures.” 2010. Web. 17 Jan 2021.
Vancouver:
Damrongwiriyanupap N. Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures. [Internet] [Doctoral dissertation]. University of Colorado; 2010. [cited 2021 Jan 17].
Available from: https://scholar.colorado.edu/cven_gradetds/35.
Council of Science Editors:
Damrongwiriyanupap N. Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures. [Doctoral Dissertation]. University of Colorado; 2010. Available from: https://scholar.colorado.edu/cven_gradetds/35
25.
Wilson, Daniel.
Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR.
Degree: 2014, RIAN
URL: http://eprints.maynoothuniversity.ie/5402/
► This thesis is concerned with the high-frequency quasi-optical modelling of telescope systems, with special attention paid to the Planck satellite, but further work is also…
(more)
▼ This thesis is concerned with the high-frequency quasi-optical modelling of telescope
systems, with special attention paid to the Planck satellite, but further work is also
performed on the Stratosphere-Troposphere Exchange And climate Monitor Radiome-
ter (STEAMR) and the Far Infrared Instrument (FIRI). The primary work surrounds
the modelling of far sidelobe (FSL) patterns of the Planck telescope, with a view to
replicating features seen in some of the difference maps made by the 857-GHz channel
of Planck's High Frequency Instrument (HFI). This is done using a variety of techniques
in a number of software packages. The General Reector Antenna Software Package
(GRASP9) is used for accurate characterisation of the FSLs using two analysis methods: Physical Optics (PO), and Geometrical Optics (GO) with the Geometrical Theory
of Diffraction (GTD). This is then compared against two simplified paraxial lens models
of the telescope, namely the Projected-Aperture (PA) technique and Gaussian Beam
Mode Analysis (GBMA). PA is performed by Fresnel integration of fields from source
to sky, while GBM requires decomposition of a field into a set of Gauss-Laguerre modes
which are propagated from source to sky using a ray matrix formalism. The motivation
for analysing the Planck FSL structure is to test the assumption that features in the
difference map are a result of manufacturing imperfections in the detector horns. To
test this hypothesis a number of altered horn geometries are modelled using the NUI
Maynooth Experimental Physics departments in-house waveguide mode-matching soft-
ware called SCATTER, and these are then used in the analysis of the telescope system.
Further use of SCATTER is illustrated in work on ultra-Gaussian horns for STEAMR,
and here it is tested against commercial waveguide modelling software Microwave Wizard
(uWW).
Further modelling is performed for the Cardiff test-bed of the Planck telescope simulator,
which was used for qualification of the Planck HFI
ight horns pre-launch. Here we test
the hypothesis that manufacturing imperfections could be missed if the effects on beam
pattern were imperceptible to measurement. This is done using GRASP9, as is the
modelling of FIRI, a multi-beam spectral/spatial interferometer which will hopefully
break current constraints on angular resolution obtainable at infra-red wavelengths.
In general, this thesis aims to provide insight into the modelling of quasi-optical telescope
systems, with particular emphasis on multi-moded systems, providing useful information
for future data analysis by the Planck project team.
Subjects/Keywords: Experimental Physics; Quasi-Optical Modelling; Telescope Systems; Planck; STEAMR
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wilson, D. (2014). Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR. (Thesis). RIAN. Retrieved from http://eprints.maynoothuniversity.ie/5402/
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):
Wilson, Daniel. “Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR.” 2014. Thesis, RIAN. Accessed January 17, 2021.
http://eprints.maynoothuniversity.ie/5402/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wilson, Daniel. “Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR.” 2014. Web. 17 Jan 2021.
Vancouver:
Wilson D. Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR. [Internet] [Thesis]. RIAN; 2014. [cited 2021 Jan 17].
Available from: http://eprints.maynoothuniversity.ie/5402/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wilson D. Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR. [Thesis]. RIAN; 2014. Available from: http://eprints.maynoothuniversity.ie/5402/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas Tech University
26.
Liu, Han.
Escape time distribution for stochastic flows.
Degree: Mathematics and Statistics, 2011, Texas Tech University
URL: http://hdl.handle.net/2346/ETD-TTU-2011-08-1590
► The model is based on models developed at the Federal Reserve Board of Governors by Robert Martin, PhD. His models were used to model data…
(more)
▼ The model is based on models developed at the Federal Reserve
Board of Governors by Robert Martin, PhD. His models were used to
model data arising from subprime mortgages. They are very simple
but capture data very well. In this thesis we used his model and
derived the partial differential equations describing the time
history of the corresponding distributions. In the case of
Brownian motion this reduced to just the Fokker-
Planck equation
and in the case of the jump process we followed the derivation in
the notes by Roger Brockett. In doing this, a deep understanding
of how to use and manipulate the It\
o formula and other aspects
of stochastic differential equations is gained.
We assume x, as a weighted variable, to evaluate the borrower's
ability to continue making payments, refinance, default or pay
off. It is scaled so that 0 represents default and 1 represents
paid. For each treatment we assume the approximation difference
equation x
n+1=(1+r)x
n-sε
n as the model where the
parameters r and s are two positive constants to be
determined. r stands for the growth rate which is a positive
real number in (0,1). The sε
n term as the bad
accidents such as divorce, job loss, career moves, etc. which can
dramatically affect the ability to pay. After 10,000 treatments,
we will find the histograms which are obtained by recording the
frequency of those jump time points. We will then analyze and
explain our results of simulation based on the histograms of the
escape time distributions.
Advisors/Committee Members: Martin, Clyde F. (Committee Chair), Drager, Lance D. (committee member).
Subjects/Keywords: Poisson counter; Brownian motion; Stochastic differential equation; Fokker-planck equation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Liu, H. (2011). Escape time distribution for stochastic flows. (Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/ETD-TTU-2011-08-1590
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):
Liu, Han. “Escape time distribution for stochastic flows.” 2011. Thesis, Texas Tech University. Accessed January 17, 2021.
http://hdl.handle.net/2346/ETD-TTU-2011-08-1590.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Liu, Han. “Escape time distribution for stochastic flows.” 2011. Web. 17 Jan 2021.
Vancouver:
Liu H. Escape time distribution for stochastic flows. [Internet] [Thesis]. Texas Tech University; 2011. [cited 2021 Jan 17].
Available from: http://hdl.handle.net/2346/ETD-TTU-2011-08-1590.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Liu H. Escape time distribution for stochastic flows. [Thesis]. Texas Tech University; 2011. Available from: http://hdl.handle.net/2346/ETD-TTU-2011-08-1590
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
27.
Wilson, Daniel.
Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR.
Degree: 2014, RIAN
URL: http://mural.maynoothuniversity.ie/5402/
► This thesis is concerned with the high-frequency quasi-optical modelling of telescope systems, with special attention paid to the Planck satellite, but further work is also…
(more)
▼ This thesis is concerned with the high-frequency quasi-optical modelling of telescope
systems, with special attention paid to the Planck satellite, but further work is also
performed on the Stratosphere-Troposphere Exchange And climate Monitor Radiome-
ter (STEAMR) and the Far Infrared Instrument (FIRI). The primary work surrounds
the modelling of far sidelobe (FSL) patterns of the Planck telescope, with a view to
replicating features seen in some of the difference maps made by the 857-GHz channel
of Planck's High Frequency Instrument (HFI). This is done using a variety of techniques
in a number of software packages. The General Reector Antenna Software Package
(GRASP9) is used for accurate characterisation of the FSLs using two analysis methods: Physical Optics (PO), and Geometrical Optics (GO) with the Geometrical Theory
of Diffraction (GTD). This is then compared against two simplified paraxial lens models
of the telescope, namely the Projected-Aperture (PA) technique and Gaussian Beam
Mode Analysis (GBMA). PA is performed by Fresnel integration of fields from source
to sky, while GBM requires decomposition of a field into a set of Gauss-Laguerre modes
which are propagated from source to sky using a ray matrix formalism. The motivation
for analysing the Planck FSL structure is to test the assumption that features in the
difference map are a result of manufacturing imperfections in the detector horns. To
test this hypothesis a number of altered horn geometries are modelled using the NUI
Maynooth Experimental Physics departments in-house waveguide mode-matching soft-
ware called SCATTER, and these are then used in the analysis of the telescope system.
Further use of SCATTER is illustrated in work on ultra-Gaussian horns for STEAMR,
and here it is tested against commercial waveguide modelling software Microwave Wizard
(uWW).
Further modelling is performed for the Cardiff test-bed of the Planck telescope simulator,
which was used for qualification of the Planck HFI
ight horns pre-launch. Here we test
the hypothesis that manufacturing imperfections could be missed if the effects on beam
pattern were imperceptible to measurement. This is done using GRASP9, as is the
modelling of FIRI, a multi-beam spectral/spatial interferometer which will hopefully
break current constraints on angular resolution obtainable at infra-red wavelengths.
In general, this thesis aims to provide insight into the modelling of quasi-optical telescope
systems, with particular emphasis on multi-moded systems, providing useful information
for future data analysis by the Planck project team.
Subjects/Keywords: Experimental Physics; Quasi-Optical Modelling; Telescope Systems; Planck; STEAMR
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wilson, D. (2014). Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR. (Thesis). RIAN. Retrieved from http://mural.maynoothuniversity.ie/5402/
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):
Wilson, Daniel. “Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR.” 2014. Thesis, RIAN. Accessed January 17, 2021.
http://mural.maynoothuniversity.ie/5402/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wilson, Daniel. “Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR.” 2014. Web. 17 Jan 2021.
Vancouver:
Wilson D. Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR. [Internet] [Thesis]. RIAN; 2014. [cited 2021 Jan 17].
Available from: http://mural.maynoothuniversity.ie/5402/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wilson D. Quasi-Optical Modelling of Telescope
Systems for Planck and STEAMR. [Thesis]. RIAN; 2014. Available from: http://mural.maynoothuniversity.ie/5402/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Kansas
28.
Li, Xi.
Dynamics of A Degenerate Fokker-Planck Equation and Its Application.
Degree: PhD, Mathematics, 2015, University of Kansas
URL: http://hdl.handle.net/1808/21706
► In this project, a Fokker-Planck equation with two singular points is studied. The equation is derived from a stochastic evolution equation, LMM-SABR model, which is…
(more)
▼ In this project, a Fokker-
Planck equation with two singular points is studied. The equation is derived from a stochastic evolution equation, LMM-SABR model, which is widely used in financial industry. It is difficult to directly study the original equation due to the singularity. As an alternative approach, we introduce appropriate modifications to certain terms of original Fokker-
Planck equation at each singular point so that the modified equation has a stationary solution. With the stable stationary solution, the intermediate behavior of the modified Fokker-
Planck equation can be captured and described to some extent. The non-modified solutions are compared to modified solutions within finite time and a relatively concrete estimation is given in terms of the modification parameter and the given finite time. We also study some possible modifications. For each modification, the properties of the stationary solution are given. Some numerical results of the time-evolution solutions for these modified equations are also included. As an attempt, we have initiated in this project the study of the difference between the modified and non-modified stochastic differential equations (SDEs). Although no complete analytical results are available, our initial work appears pointing in a promising direction, based on the numerical simulation results that we have observed. The further study of the SDEs will be carried out in the future work.
Advisors/Committee Members: Liu, Weishi (advisor), Liu, Weishi (cmtemember), Hu, Yaozhong (cmtemember), Stanislavova, Milena (cmtemember), Van Vleck, Erik (cmtemember), Zhang, Jianbo (cmtemember).
Subjects/Keywords: Mathematics; Applied mathematics; Degenerate; Dynamics; Fokker-Planck Equation; Stochastic Differential Equation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, X. (2015). Dynamics of A Degenerate Fokker-Planck Equation and Its Application. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/21706
Chicago Manual of Style (16th Edition):
Li, Xi. “Dynamics of A Degenerate Fokker-Planck Equation and Its Application.” 2015. Doctoral Dissertation, University of Kansas. Accessed January 17, 2021.
http://hdl.handle.net/1808/21706.
MLA Handbook (7th Edition):
Li, Xi. “Dynamics of A Degenerate Fokker-Planck Equation and Its Application.” 2015. Web. 17 Jan 2021.
Vancouver:
Li X. Dynamics of A Degenerate Fokker-Planck Equation and Its Application. [Internet] [Doctoral dissertation]. University of Kansas; 2015. [cited 2021 Jan 17].
Available from: http://hdl.handle.net/1808/21706.
Council of Science Editors:
Li X. Dynamics of A Degenerate Fokker-Planck Equation and Its Application. [Doctoral Dissertation]. University of Kansas; 2015. Available from: http://hdl.handle.net/1808/21706

Vanderbilt University
29.
Arnold, Joshua Robert.
Reducing uncertainty in the characterization and modeling of reactive transport processes in blended cement mortar.
Degree: PhD, Environmental Engineering, 2014, Vanderbilt University
URL: http://hdl.handle.net/1803/12049
► Cements blended with industrial byproducts are ubiquitous construction materials widely used in waste management. The use of blended cements as barriers for nuclear waste management…
(more)
▼ Cements blended with industrial byproducts are ubiquitous construction materials widely used in waste management. The use of blended cements as barriers for nuclear waste management necessitates prediction of durability and long-term performance. A key component of durability prediction is mechanistically based reactive transport modeling. This work identifies critical parametric and model uncertainties within three key components of reactive transport modeling for blended cementitious materials: mass transport, mass conservation, and thermodynamic characterization. Studies of electroneutral ionic diffusion and the electrostatic interaction of dissolved ionic species and charged cement pore surfaces suggest that the influence of electrical interaction on transport may be more significant than previously surmised. A novel technique for measuring the elemental composition of reacted cementitious material in mortars compares favorably with established laboratory leaching techniques. Thermodynamic parameters developed for unblended cements are demonstrated to be generally applicable to the description of blended cements in both equilibrium and reactive transport modeling.
Advisors/Committee Members: Florence Sanchez (committee member), Hans van der Sloot (committee member), J.C.L. Meeussen (committee member), Christine Langton (committee member), John Ayers (committee member), Andrew C. Garrabrants (Committee Chair), David S. Kosson (Committee Chair).
Subjects/Keywords: supplementary cementitious materials; blended cement; SEM; Nernst-Planck; diffusion; reactive transport
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Arnold, J. R. (2014). Reducing uncertainty in the characterization and modeling of reactive transport processes in blended cement mortar. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/12049
Chicago Manual of Style (16th Edition):
Arnold, Joshua Robert. “Reducing uncertainty in the characterization and modeling of reactive transport processes in blended cement mortar.” 2014. Doctoral Dissertation, Vanderbilt University. Accessed January 17, 2021.
http://hdl.handle.net/1803/12049.
MLA Handbook (7th Edition):
Arnold, Joshua Robert. “Reducing uncertainty in the characterization and modeling of reactive transport processes in blended cement mortar.” 2014. Web. 17 Jan 2021.
Vancouver:
Arnold JR. Reducing uncertainty in the characterization and modeling of reactive transport processes in blended cement mortar. [Internet] [Doctoral dissertation]. Vanderbilt University; 2014. [cited 2021 Jan 17].
Available from: http://hdl.handle.net/1803/12049.
Council of Science Editors:
Arnold JR. Reducing uncertainty in the characterization and modeling of reactive transport processes in blended cement mortar. [Doctoral Dissertation]. Vanderbilt University; 2014. Available from: http://hdl.handle.net/1803/12049

Kansas State University
30.
Islam, Md Atiqul.
Cyanobacterial harmful algal bloom modeling in eutrophic water
bodies.
Degree: MS, Department of Biological &
Agricultural Engineering, 2020, Kansas State University
URL: http://hdl.handle.net/2097/40914
► Harmful algal bloom (or HAB) is a global phenomenon in the rising trend of environmental concerns that impacts public health and the economy through declining…
(more)
▼ Harmful algal bloom (or HAB) is a global phenomenon in
the rising trend of environmental concerns that impacts public
health and the economy through declining water quality and
toxicity. A rapid increase in cyanobacteria concentrations in water
bodies is a primary cause of HABs. Enhanced eutrophication and
warmer climate are considered vital driving factors for the
proliferation of HAB events in the United States and worldwide.
Dynamic modeling of cyanobacteria concentrations can help manage
and reduce the impact of toxic blooms by better understanding the
conditions for cyanobacteria growth and providing recommendations
for early advisory warnings to the public for eutrophic water
bodies in the agriculture dominated watersheds of the Midwest. In
this study, sub-daily time series of cyanobacteria concentration
and other environmental, physical-chemical variables were collected
at the USGS sites in southcentral Kansas at Cheney Reservoir near
the City of Wichita and in northeast Kansas at Kansas River near
Wamego. Statistical analysis of the data revealed positive
correlations between cyanobacteria concentration and water
temperature, irradiation, phosphorus concentration, and storage
volume. Correlation of dissolved oxygen depletion with
cyanobacteria growth indicated an adverse impact of HABs on aquatic
systems. A process-based mathematical framework for the kinetics of
cyanobacteria growth was implemented at two sites considering
bacteria natural growth, non-predatory loss, outflow washout, and
accounting for the changes in water temperature (T), solar
irradiance (I), and available nutrients (phosphorus [P] and
nitrogen [N]). Four models were developed to facilitate examination
of potential data limitation in sampling and continuous
observations: (i) T-based, (ii) T, I-based, (iii) T, I, P- based,
and (iv) complete four-factor model (T, I, P, N-based). The models
were calibrated using continuous observations in 2013 - 2014 with
time intervals from 2 days to 15 days (NSE = 0.41 to 0.71), and
validated for 2018 (NSE = 0.56).
Simulations revealed model
efficiency in short-term (one day to bi-weekly) forecasting of
cyanobacteria concentration for both nutrient-rich sites. The
performance of TIP-based and TIPN-based models was found acceptable
for long-term forecasting in the Cheney Reservoir. Data sampling at
a 15-day interval was found adequate for the forecasting of
cyanobacteria growth. A stochastic modeling approach was applied to
the TIPN model that converted a kinetic growth model to a modified
Fokker-
Planck equation for the probability density function of the
cyanobacteria concentration to account for variability in influent
nutrient concentrations and their impact on HABs. Several single
storm event scenarios were simulated to evaluate the impact of high
nutrient runoff into the lake on cyanobacteria. Stochastic model
simulations showed that mechanistic modeling forecasting
uncertainty increased along time propagation and higher uncertainty
in initial concentrations of the cyanobacteria. The process-based…
Advisors/Committee Members: Aleksey Y. Sheshukov.
Subjects/Keywords: Cyanobacteria; Harmful Algal Blooms; Process-based model;
Fokker-Planck equation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Islam, M. A. (2020). Cyanobacterial harmful algal bloom modeling in eutrophic water
bodies. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/40914
Chicago Manual of Style (16th Edition):
Islam, Md Atiqul. “Cyanobacterial harmful algal bloom modeling in eutrophic water
bodies.” 2020. Masters Thesis, Kansas State University. Accessed January 17, 2021.
http://hdl.handle.net/2097/40914.
MLA Handbook (7th Edition):
Islam, Md Atiqul. “Cyanobacterial harmful algal bloom modeling in eutrophic water
bodies.” 2020. Web. 17 Jan 2021.
Vancouver:
Islam MA. Cyanobacterial harmful algal bloom modeling in eutrophic water
bodies. [Internet] [Masters thesis]. Kansas State University; 2020. [cited 2021 Jan 17].
Available from: http://hdl.handle.net/2097/40914.
Council of Science Editors:
Islam MA. Cyanobacterial harmful algal bloom modeling in eutrophic water
bodies. [Masters Thesis]. Kansas State University; 2020. Available from: http://hdl.handle.net/2097/40914
◁ [1] [2] [3] [4] [5] [6] [7] ▶
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