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1.
El Kamel, Mohamed Anouar.
Stabilisation et régulation de robots mobiles opérant en groupe : Stabilization and regulation of mobile robots formation.
Degree: Docteur es, Mathématiques appliquées, 2012, Evry-Val d'Essonne; École polytechnique de Tunisie (La Marsa)
URL: http://www.theses.fr/2012EVRY0015 
► Pour les systèmes de commande sous la forme de dx/dt = f (x, u), dans la littérature, les chercheurs s'intéressaient à la stabilisation de ce…
(more)
▼ Pour les systèmes de commande sous la forme de dx/dt = f (x, u), dans la littérature, les chercheurs s'intéressaient à la stabilisation de ce système de différentes manières : asymptotique, uniformément asymptotique, partielle, en temps fini, etc. Pour aboutir à ces résultats, les méthodes utilisées font appel aux techniques suivantes : Lyapunov, Lasalle, Barbalat, surface glissante, etc. Dans cette thèse, nous nous sommes intéressés à une autre fonctionnalité de la commande, dite commande répulsive stabilisante. Les résultats ont été généralisés au cas d'un système avec dérive et sans dérive. Comme résultat, l'approche de commande qu'on propose assure la stabilité du système autour d'une position désirée et la répulsion de celui-ci par rapport à un ensemble indésirable, construit dans l'espace de navigation. Toute forme d'application sera concernée par nos résultats théoriques, on peut citer, la navigation terrestre et aérienne dans un environnement peu ou pas connu. De même, la commande qu'on propose préserve la communication inter-agent, une fois planifiées. En terme d'application, on a considéré le modèle d'un véhicule à roues type unicycle, sans tenir compte de l'orientation (cas non holonôme) et dans le cas où l'environnement contient un ou plusieurs obstacle(s). Contrairement aux résultats de la littérature, qui sont basés sur une commande à structure variable pour l'évitement d'un obstacle, la commande répulsive-stabilisante trouvée est une commande continue sur l'espace de navigation. La deuxième partie de cette thèse traite le problème de stabilité d'une formation d'agents (système multi-véhicules) qui évolue dans un environnement hostile tout en préservant la communication entre les agents. Pour réussir la formation, la décentralisation de la commande par rapport aux agents est rendue robuste à travers des graphes de communication. Ces graphes relèvent de la stratégie et objectifs de la formation. Nos résultats de stabilité ont fait l'objet d'une implémentation rigoureuse sur un simulateur réalisé sous Matlab.
For control systems in the form dx/dt = f (x, u), in the literature, researchers were interested in stabilizing the system in different ways : asymptotic, uniformly asymptotic, partial, innite time, etc. To achieve these results, the methods involve the following techniques : Lyapunov, LaSalle, Barbalat, sliding surface, etc. In this thesis, we became interested in another feature form of the controller, called repulsive stabilizing controller. The results were generalized to the case of a system with drift and without drift. As a result, the proposed control approach ensures the system stability around a desired position and the repulsion of the latter over a set junk, built in the navigation space. Any form of application will be concerned by our theoretical results including, terrestrial and aerial navigations in a little known or not known environment. Similarly, the proposed control law, once planned, preserves the inter-agent communication. In terms of application, we considered the model of…
Advisors/Committee Members: Beji, Lotfi (thesis director), Abichou, Azgal (thesis director).
Subjects/Keywords: Véhicules en formation; Formation control
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APA (6th Edition):
El Kamel, M. A. (2012). Stabilisation et régulation de robots mobiles opérant en groupe : Stabilization and regulation of mobile robots formation. (Doctoral Dissertation). Evry-Val d'Essonne; École polytechnique de Tunisie (La Marsa). Retrieved from http://www.theses.fr/2012EVRY0015
Chicago Manual of Style (16th Edition):
El Kamel, Mohamed Anouar. “Stabilisation et régulation de robots mobiles opérant en groupe : Stabilization and regulation of mobile robots formation.” 2012. Doctoral Dissertation, Evry-Val d'Essonne; École polytechnique de Tunisie (La Marsa). Accessed December 14, 2019.
http://www.theses.fr/2012EVRY0015.
MLA Handbook (7th Edition):
El Kamel, Mohamed Anouar. “Stabilisation et régulation de robots mobiles opérant en groupe : Stabilization and regulation of mobile robots formation.” 2012. Web. 14 Dec 2019.
Vancouver:
El Kamel MA. Stabilisation et régulation de robots mobiles opérant en groupe : Stabilization and regulation of mobile robots formation. [Internet] [Doctoral dissertation]. Evry-Val d'Essonne; École polytechnique de Tunisie (La Marsa); 2012. [cited 2019 Dec 14].
Available from: http://www.theses.fr/2012EVRY0015.
Council of Science Editors:
El Kamel MA. Stabilisation et régulation de robots mobiles opérant en groupe : Stabilization and regulation of mobile robots formation. [Doctoral Dissertation]. Evry-Val d'Essonne; École polytechnique de Tunisie (La Marsa); 2012. Available from: http://www.theses.fr/2012EVRY0015
University of Georgia
2.
Kusnerik, Kristopher Michael.
Community paleoecology and biogeography of the Jurassic (Bajocian-Oxfordian) Sundance Seaway in the Bighorn Basin of Wyoming and Montana, U.S.A.
Degree: MS, Geology, 2015, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/kusnerik_kristopher_m_201505_ms
► The composition of marine communities is controlled by colonization of newly available habitat, development of community associations, and community variation in response to a gradient…
(more)
▼ The composition of marine communities is controlled by colonization of newly available habitat, development of community associations, and community variation in response to a gradient of environmental conditions. The Jurassic Sundance Seaway of the Bighorn Basin, Wyoming and Montana provides an ideal case study for determining the role of these factors on community composition and variation. The global provenance of taxa found in the Seaway support reconstructions depicting a single, northern entranceway. This, along with the Seaway’s length and shallow depth, likely caused restrictions on taxa able to enter the Seaway under normal conditions, leading to communities with low diversity and low evenness. Ordination analysis suggests the primary factor controlling community composition was a complex gradient related to water depth. Secondary factors include substrate, salinity, and a carbonate to siliciclastic transition. These patterns are typical of Jurassic marine communities globally.
Advisors/Committee Members: Steven Holland.
Subjects/Keywords: Sundance Formation
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APA (6th Edition):
Kusnerik, K. M. (2015). Community paleoecology and biogeography of the Jurassic (Bajocian-Oxfordian) Sundance Seaway in the Bighorn Basin of Wyoming and Montana, U.S.A. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/kusnerik_kristopher_m_201505_ms
Chicago Manual of Style (16th Edition):
Kusnerik, Kristopher Michael. “Community paleoecology and biogeography of the Jurassic (Bajocian-Oxfordian) Sundance Seaway in the Bighorn Basin of Wyoming and Montana, U.S.A.” 2015. Masters Thesis, University of Georgia. Accessed December 14, 2019.
http://purl.galileo.usg.edu/uga_etd/kusnerik_kristopher_m_201505_ms.
MLA Handbook (7th Edition):
Kusnerik, Kristopher Michael. “Community paleoecology and biogeography of the Jurassic (Bajocian-Oxfordian) Sundance Seaway in the Bighorn Basin of Wyoming and Montana, U.S.A.” 2015. Web. 14 Dec 2019.
Vancouver:
Kusnerik KM. Community paleoecology and biogeography of the Jurassic (Bajocian-Oxfordian) Sundance Seaway in the Bighorn Basin of Wyoming and Montana, U.S.A. [Internet] [Masters thesis]. University of Georgia; 2015. [cited 2019 Dec 14].
Available from: http://purl.galileo.usg.edu/uga_etd/kusnerik_kristopher_m_201505_ms.
Council of Science Editors:
Kusnerik KM. Community paleoecology and biogeography of the Jurassic (Bajocian-Oxfordian) Sundance Seaway in the Bighorn Basin of Wyoming and Montana, U.S.A. [Masters Thesis]. University of Georgia; 2015. Available from: http://purl.galileo.usg.edu/uga_etd/kusnerik_kristopher_m_201505_ms
3.
Quemeneur, Geneviève.
Les savoirs professionnels engendrés par la pratique enseignante à l'école élémentaire : Professional knowledges arised from teaching practice at elementary school.
Degree: Docteur es, Sciences de l'éducation, 2010, Université Paris X – Nanterre
URL: http://www.theses.fr/2010PA100188
► Peut-on apprendre le métier d’enseignant ? Apprend-on en enseignant et qu’apprend-on ? Depuis la création de l’école primaire, de nombreuses réflexions ont été menées pour…
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▼ Peut-on apprendre le métier d’enseignant ? Apprend-on en enseignant et qu’apprend-on ? Depuis la création de l’école primaire, de nombreuses réflexions ont été menées pour répondre à ces questions. Le niveau d’instruction des enseignants a été progressivement et continuellement élevé. Pour faire face à la complexité de la pratique, la pédagogie a été introduite très tôt dans les programmes de formation. Que peut-on constater aujourd’hui au sujet de ce que savent les praticiens de l’école élémentaire ?Ce travail se propose, en interrogeant des enseignants chevronnés de mettre en évidence les savoirs issus de la pratique, leurs fondements et leurs objets. L’enquête effectuée révèle que la plupart de ces enseignants émettent des doutes et s’interrogent quant à l’existence de ces savoirs. Cependant ils estiment avoir acquis des savoir-être qui modifient positivement leur personnalité et leur identité et par conséquent leur pratique.
Can we learn how to teach ? What learns a teacher by teaching and how? Since the creation of elementary school, this matter has been the subject of many studies. The level of knowledge of teachers has been improved in a progressive and continuous maner. In order to take into account the complexity of pratical teaching, pedagogy has been introduced very early in the professional cursus.Therefore what do the the teachers of elementary school know?This work, by inquiring experimented teachers of elementary schools tries to point out the knowledges coming out by practising teaching, the origin of them and their aims. Most of the answers of the teachers shows that they ask themselves about the existence of such knowledge from practising. However these teachers, estimate that, by the way, they have acquired a “know to be” which modifies deeply their personnality and their teaching.
Advisors/Committee Members: Hugon, Marie-Anne (thesis director).
Subjects/Keywords: Savoir; Formation
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APA (6th Edition):
Quemeneur, G. (2010). Les savoirs professionnels engendrés par la pratique enseignante à l'école élémentaire : Professional knowledges arised from teaching practice at elementary school. (Doctoral Dissertation). Université Paris X – Nanterre. Retrieved from http://www.theses.fr/2010PA100188
Chicago Manual of Style (16th Edition):
Quemeneur, Geneviève. “Les savoirs professionnels engendrés par la pratique enseignante à l'école élémentaire : Professional knowledges arised from teaching practice at elementary school.” 2010. Doctoral Dissertation, Université Paris X – Nanterre. Accessed December 14, 2019.
http://www.theses.fr/2010PA100188.
MLA Handbook (7th Edition):
Quemeneur, Geneviève. “Les savoirs professionnels engendrés par la pratique enseignante à l'école élémentaire : Professional knowledges arised from teaching practice at elementary school.” 2010. Web. 14 Dec 2019.
Vancouver:
Quemeneur G. Les savoirs professionnels engendrés par la pratique enseignante à l'école élémentaire : Professional knowledges arised from teaching practice at elementary school. [Internet] [Doctoral dissertation]. Université Paris X – Nanterre; 2010. [cited 2019 Dec 14].
Available from: http://www.theses.fr/2010PA100188.
Council of Science Editors:
Quemeneur G. Les savoirs professionnels engendrés par la pratique enseignante à l'école élémentaire : Professional knowledges arised from teaching practice at elementary school. [Doctoral Dissertation]. Université Paris X – Nanterre; 2010. Available from: http://www.theses.fr/2010PA100188
Université Catholique de Louvain
4.
Grandjean, Gilles J.
Essays on social and economic networks.
Degree: 2010, Université Catholique de Louvain
URL: http://hdl.handle.net/2078.1/69216
► This dissertation studies the outcome of social and economic interactions when agents have the possibility to establish bilateral or multilateral partnerships. Partnerships are critical to…
(more)
▼ This dissertation studies the outcome of social and economic interactions when agents have the possibility to establish bilateral or multilateral partnerships. Partnerships are critical to the scientific collaboration, R&D activities developed by firms, trade patterns, and to the dissemination of information about jobs, political opinions, new products and technologies.
Chapter 1 identifies necessary and sufficient conditions on the primitives of the game so that farsighted agents -agents able to forecast how other agents would react to their choice of partners- form efficient networks. It shows that under those conditions, pairwise farsighted stability refines pairwise stability by eliminating the inefficient pairwise stable networks.
In chapter 2, we provide an algorithm that characterizes the unique pairwise farsightedly stable set of networks when the value is allocated equally among the players of a component. It is shown that (i) if groupwise deviations are allowed then whether players are farsighted or myopic does not matter; (ii) if players are farsighted then whether players are allowed to deviate in pairs only or in groups does not matter.
Chapter 3 analyzes the formation of risk-sharing networks among farsighted agents in rural areas of developing countries. We provide a theoretical explanation of the observation that risk-sharing takes place among agents having common characteristics (neighborhood, professional or religious affiliation, kinship, etc.).
In chapter 4, we propose a new solution concept, the strong curb set, to analyze stability in non-cooperative games when groups of agents may coordinate their moves. We relate our concept with the standard notions of stability. It is shown that there is a class of dynamic learning processes such that at the limit, if memory is long enough, play settles down in a strong curb set.
Nous étudions dans cette thèse le résultat d’interactions sociales et économiques lorsque les agents ont la possibilité d’établir des partenariats bilatéraux ou multilatéraux. De tels partenariats jouent un rôle important pour comprendre les collaborations scientifiques, la diffusion d’informations à propos d’emplois, d’opinions politiques, de nouveaux produits et nouvelles technologies. Ils influencent les activités de recherche et développement des entreprises, les flux commerciaux entre les pays et les alliances politiques.
Le chapitre 1 identifie les conditions nécessaires et suffisantes sur les primitives du jeu qui garantissent que les réseaux formés parmi des agents prévoyants –des agents qui sont capables de prédire comment d’autres agents réagiraient à leurs choix de partenariat– sont efficaces. Il est montré que sous ces conditions, la stabilité par paires lorsque les agents sont prévoyants affine la stabilité par paires en éliminant les réseaux inefficaces qui sont stables par paires.
Dans le chapitre 2, nous proposons un algorithme qui caractérise l’ensemble unique des réseaux stables par paires lorsque les agents sont prévoyants et que les bénéfices générés par le…
Advisors/Committee Members: UCL - ECGE - Sciences économiques et de gestion, Vannetelbosch, Vincent, Mauleon, Ana, Vandenberghe, Vincent, Belleflamme, Paul, Vega-Redondo, Fernando, Bloch, Francis, Goyal, Sanjeev.
Subjects/Keywords: Network formation
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APA (6th Edition):
Grandjean, G. J. (2010). Essays on social and economic networks. (Thesis). Université Catholique de Louvain. Retrieved from http://hdl.handle.net/2078.1/69216
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):
Grandjean, Gilles J. “Essays on social and economic networks.” 2010. Thesis, Université Catholique de Louvain. Accessed December 14, 2019.
http://hdl.handle.net/2078.1/69216.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Grandjean, Gilles J. “Essays on social and economic networks.” 2010. Web. 14 Dec 2019.
Vancouver:
Grandjean GJ. Essays on social and economic networks. [Internet] [Thesis]. Université Catholique de Louvain; 2010. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/2078.1/69216.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Grandjean GJ. Essays on social and economic networks. [Thesis]. Université Catholique de Louvain; 2010. Available from: http://hdl.handle.net/2078.1/69216
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
5.
Chiang, Hsin-Fang.
Circumstellar environments around the youngest protostars: interferometric observations and modeling.
Degree: PhD, 0333, 2012, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/29575
► This thesis presents observations and modeling of nearby embedded sources in the earliest stage of protostellar evolution, i.e., Class 0 young stellar objects, using interferometric…
(more)
▼ This thesis presents observations and modeling
of nearby embedded sources in the earliest stage of protostellar evolution,
i.e., Class 0 young stellar objects,
using interferometric data of the
Berkeley-Illinois-Maryland Association array and the
Combined Array for Research in Millimeter-wave Astronomy.
Protostars form through gravitational collapse inside their natal envelopes,
and these circumstellar envelopes contain valuable information
about the physical processes of star
formation.
In this thesis, both molecular lines and dust continuum are utilized to
investigate the nature of the collapsing envelopes.
In particular, I focus on the isolated edge-on low-mass protostar L1157.
While a large-scale (~20,000 AU) flattened envelope is detected in both
the N2H+ line and the 8 micron extinction perpendicular to
the outflow orientation,
the dust continuum shows spherical structures at scales between
~10
2 and ~10
3 AU.
The N2H+ observations not only reveal
the outer envelope that is too dim to be detected in dust continuum,
but they also unveil the kinematic structures of the flattened envelope.
The dust continuum is compared with theoretical collapse models
using radiative transfer calculation and Bayesian inference.
The modeling techniques, as well as the associated uncertainties,
are detailed.
The results show that a power-law envelope model with a density index p ~ 2
provides a better fit to the observations than
the simple Shu model or
the commonly-used Terebey-Shu-Cassen model.
Furthermore, I discuss the implications of the modeling results on the dust grain properties
and the constraints they place on the youngest circumstellar disk embedded inside the envelope.
Advisors/Committee Members: Looney, Leslie W. (advisor), Looney, Leslie W. (Committee Chair), Kemball, Athol J. (committee member), Gammie, Charles F. (committee member), Mouschovias, T. Ch. (committee member).
Subjects/Keywords: star formation
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APA (6th Edition):
Chiang, H. (2012). Circumstellar environments around the youngest protostars: interferometric observations and modeling. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/29575
Chicago Manual of Style (16th Edition):
Chiang, Hsin-Fang. “Circumstellar environments around the youngest protostars: interferometric observations and modeling.” 2012. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed December 14, 2019.
http://hdl.handle.net/2142/29575.
MLA Handbook (7th Edition):
Chiang, Hsin-Fang. “Circumstellar environments around the youngest protostars: interferometric observations and modeling.” 2012. Web. 14 Dec 2019.
Vancouver:
Chiang H. Circumstellar environments around the youngest protostars: interferometric observations and modeling. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2012. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/2142/29575.
Council of Science Editors:
Chiang H. Circumstellar environments around the youngest protostars: interferometric observations and modeling. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2012. Available from: http://hdl.handle.net/2142/29575
6.
Tumennasan, Norovsambuu.
Essays in Collective Decision Making and Price
Matching.
Degree: PhD, Economics, 2009, Brown University
URL: https://repository.library.brown.edu/studio/item/bdr:150/
► Human beings live in societies, yet we are self centered. Therefore, the collective decision making problem is, as well as being complex, of great importance.…
(more)
▼ Human beings live in societies, yet we are self
centered. Therefore, the collective decision making problem is, as
well as being complex, of great importance. The first two chapters
of my dissertation deal with two aspects of collective decision
making: coalition
formation and implementation. The first chapter
investigates how moral hazard affects coalitional structures in the
context of an economy with a stochastic production process. Moral
hazard is known to undermine efficiency, so it has been universally
considered undesirable. However, this paper demonstrates that in
some instances moral hazard helps teams to form and survive, and so
could in fact be desirable. The second chapter investigates the
implementation problem in a setting with boundedly rational
players. To capture that the players are boundedly rational, we
consider implementation in Limit logit Quantal Response Equilibria
(LLQRE). LQRE is an equilibrium concept in which the players
mistakenly play non-optimal strategies with a probability that is
decreasing in both the size of the mistake and the parameterized
level of rationality. Therefore, LLQRE can be considered as an
infinitesimal perturbation of Nash equilibria in the direction of
less rationality. The paper finds that Quasimonotonicity and No
Worst Alternative conditions are necessary for implementation in
restricted LLQRE and, conversely, that these conditions jointly
with No Veto Power are sufficient for LLQRE implementation in
environments with no fewer than three agents. The third chapter
studies how price matching affects the market price if firms can
choose their capacity. We use the setting of Kreps and Scheinkman
(1983), i.e., each firm installs their capacities in the first
period and chooses its price along with the price matching option
in the second period. We show that price matching which is widely
believed to have an anti-competition affect could hurt consumers if
and only if the total Cournot quantity with an installation cost
exceeds the Monopolistic quantity with zero cost.
Advisors/Committee Members: Serrano, Roberto (director), de Clippel, Geoffroy (reader), Turner, Sergio (reader).
Subjects/Keywords: Coalition formation
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APA ·
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MLA ·
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tumennasan, N. (2009). Essays in Collective Decision Making and Price
Matching. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:150/
Chicago Manual of Style (16th Edition):
Tumennasan, Norovsambuu. “Essays in Collective Decision Making and Price
Matching.” 2009. Doctoral Dissertation, Brown University. Accessed December 14, 2019.
https://repository.library.brown.edu/studio/item/bdr:150/.
MLA Handbook (7th Edition):
Tumennasan, Norovsambuu. “Essays in Collective Decision Making and Price
Matching.” 2009. Web. 14 Dec 2019.
Vancouver:
Tumennasan N. Essays in Collective Decision Making and Price
Matching. [Internet] [Doctoral dissertation]. Brown University; 2009. [cited 2019 Dec 14].
Available from: https://repository.library.brown.edu/studio/item/bdr:150/.
Council of Science Editors:
Tumennasan N. Essays in Collective Decision Making and Price
Matching. [Doctoral Dissertation]. Brown University; 2009. Available from: https://repository.library.brown.edu/studio/item/bdr:150/
7.
McCalla, Scott G.
Localized Structures in the Multi-dimensional
Swift-Hohenberg Equation.
Degree: PhD, Applied Mathematics, 2011, Brown University
URL: https://repository.library.brown.edu/studio/item/bdr:11254/
► This goal of this thesis is to understand patterns in the Swift{Hohenberg equation. Thepatterns studied are localized, stationary and radially symmetric in dimensions one throughthree.…
(more)
▼ This goal of this thesis is to understand patterns in
the Swift{Hohenberg equation. Thepatterns studied are localized,
stationary and radially symmetric in dimensions one throughthree.
The emphasis is placed on the existence of these structures through
numericalevidence and analytic proofs.The bifurcation structure of
localized stationary radial patterns of the Swift{Hohenbergequation
is explored when a continuous parameter n is varied that
corresponds to the underlyingspace dimension whenever n is an
integer. In particular, this numerical investigationreveals how 1D
pulses and 2-pulses are connected to planar spots and rings when n
isincreased from 1 to 2. It also elucidates changes in the snaking
diagrams of spots whenthe dimension is switched from 2 to 3.A
previously unknown spot solution is additionally uncovered. The
second half of thethesis is devoted to rigorously proving this
spot's existence. The amplitude of the spotexhibits an unexpected
scaling as the bifurcation parameter is reduced to zero. The spotis
constructed by gluing two known solutions together, each scaling as
the square root ofthe bifurcation parameter, but it has a much
larger scaling. This behaviour is explainedas a result of the
proof.
Advisors/Committee Members: Sandstede, Bjorn (Director), Mallet-Paret, John (Reader), Scheel, Arnd (Reader).
Subjects/Keywords: Pattern Formation
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
McCalla, S. G. (2011). Localized Structures in the Multi-dimensional
Swift-Hohenberg Equation. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:11254/
Chicago Manual of Style (16th Edition):
McCalla, Scott G. “Localized Structures in the Multi-dimensional
Swift-Hohenberg Equation.” 2011. Doctoral Dissertation, Brown University. Accessed December 14, 2019.
https://repository.library.brown.edu/studio/item/bdr:11254/.
MLA Handbook (7th Edition):
McCalla, Scott G. “Localized Structures in the Multi-dimensional
Swift-Hohenberg Equation.” 2011. Web. 14 Dec 2019.
Vancouver:
McCalla SG. Localized Structures in the Multi-dimensional
Swift-Hohenberg Equation. [Internet] [Doctoral dissertation]. Brown University; 2011. [cited 2019 Dec 14].
Available from: https://repository.library.brown.edu/studio/item/bdr:11254/.
Council of Science Editors:
McCalla SG. Localized Structures in the Multi-dimensional
Swift-Hohenberg Equation. [Doctoral Dissertation]. Brown University; 2011. Available from: https://repository.library.brown.edu/studio/item/bdr:11254/
8.
Christopher Steven, Burton.
The Environmental Dependence of Galaxy Evolution
.
Degree: 2013, University of Hertfordshire
URL: http://hdl.handle.net/2299/12572
► Observations of galaxy environments have revealed numerous correlations associated with their intrinsic properties. It is therefore clear that if we are to understand the processes…
(more)
▼ Observations of galaxy environments have revealed numerous correlations associated
with their intrinsic properties. It is therefore clear that if we are to understand the
processes by which galaxies form and evolve, we have to consider the role of their immediate
environment and how these trends change across cosmic time. In this thesis,
I investigate the relationship between the environmental densities of galaxies and their
associated properties by developing and implementing a novel approach to measuring
galaxy environments on individual galaxy scales with Voronoi tessellations. Using optical
spectroscopy and photometry from GAMA and SDSS, with 250??m far-infrared
observations from the Herschel-ATLAS SDP and Phase-One fields, the environmental
and star formation properties of far-infrared detected and non???far-infrared detected
galaxies are compared out to z ??? 0.5. Applying statistical analyses to colour, magnitude
and redshift-matched samples, I show there to be significant differences between
the normalised density distributions of the optical and far-infrared selected samples,
at the 3.5?? level for the SDP increasing to > 5?? when combined with the Phase-One
data. This is such that infrared emission (a tracer of star formation activity) favours
underdense regions, in agreement with previous studies that have proposed such a
correlation. I then apply my method to synthetic light cones generated from semianalytic
models (SAMs), finding that over the whole redshift distribution the same
correlations between star-formation rate and environmental density are found. However,
as the SAMs restrict the role of ram-pressure stripping, the fact that we find the
same qualitative results may preclude ram-pressure as a key mechanism in truncating
star formation. I also find significant correlations between isothermal dust temperature and environment, such that the coldest sources reside in the densest regions at the 3.9??
level, indicating that the observed far-infrared emission in these densest regions is the
product of ISM heating by the older stellar populations.
I then extend my analysis to a deeper sample of galaxies out to z ??? 2.2, combining
near-infrared and optical photometry from the VIDEO and CFHTLS-D1 observations,
cross-matched in colour, magnitude and redshift against 1.4 GHz VLA radio observations.
Across the entire radio sample, galaxies with radio detected emission are
found to reside in more overdense environments at a 4.0?? significance level. I then divide
my radio sample to investigate environmental dependence on both radio detected
star-forming galaxies and radio detected AGN individually, based upon a luminosity
selection defined as L = 1023 W Hz???1. The same trends with environment are shown
by my Radio-AGN sample (L > 1023 W Hz???1) which favour overdense regions at the
4.5?? level, suggestive of the interaction processes (i.e. major mergers) that are believed
to trigger accretion, in agreement with earlier work that has suggested such a
relationship. At lower…
Subjects/Keywords: galaxies;
evolution;
formation;
star formation;
infrared;
statistics
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APA (6th Edition):
Christopher Steven, B. (2013). The Environmental Dependence of Galaxy Evolution
. (Thesis). University of Hertfordshire. Retrieved from http://hdl.handle.net/2299/12572
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):
Christopher Steven, Burton. “The Environmental Dependence of Galaxy Evolution
.” 2013. Thesis, University of Hertfordshire. Accessed December 14, 2019.
http://hdl.handle.net/2299/12572.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Christopher Steven, Burton. “The Environmental Dependence of Galaxy Evolution
.” 2013. Web. 14 Dec 2019.
Vancouver:
Christopher Steven B. The Environmental Dependence of Galaxy Evolution
. [Internet] [Thesis]. University of Hertfordshire; 2013. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/2299/12572.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Christopher Steven B. The Environmental Dependence of Galaxy Evolution
. [Thesis]. University of Hertfordshire; 2013. Available from: http://hdl.handle.net/2299/12572
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
9.
Chrit, Mounir.
Formation des aérosols organiques et inorganiques en Méditerranée : Organic and inorganic aerosol formation in the Mediterranean.
Degree: Docteur es, Sciences et Techniques de l'Environnement, 2018, Université Paris-Est
URL: http://www.theses.fr/2018PESC1027
► Le but de cette thèse est de comprendre les origines et les processus de formation des aérosols organiques (AO) et inorganiques (AI)en Méditerranée durant différentes…
(more)
▼ Le but de cette thèse est de comprendre les origines et les processus de
formation des aérosols organiques (AO) et inorganiques (AI)en Méditerranée durant différentes saisons en utilisant le modèle de chimie-transport de la plateforme de la modélisation de la qualité de l'air Polyphemus. Dans le cadre du projet de recherche ChArMEx (Chemistry Aerosol Mediterranean Experiment), des mesures des concentrations des aérosols et de leurs propriétés ont été conduites à la station ERSA du Cap Corse (île de la Corse, France) dans le bassin ouest de la Méditerranée pendant les étés 2012 et 2013 et l'hiver2014. Ce travail de thèse a également bénéficié de mesures effectuées durant des vols avions au-dessus de la Méditerranée pendant l'été 2014.Le modèle est évalué pendant les différentes périodes simulées et des processus/paramétrisations ont été ajoutés ou modifiés afin d'avoir de bonnes comparaisons modèle/mesures pour les concentrations et les propriétés des aérosols. Des études de sensitivité à la météorologie, aux émissions anthropiques et aux émissions marines, en plus des différents paramètres d’entrée du modèle sont conduites pour comprendre les origines des aérosols. La paramétrisation des émissions de sels marins est choisie de manière à avoir de bonnes comparaisons aux mesures de sodium, qui est un composé non volatil émis principalement par les sels marins. Grâce à une paramétrisation qui estime la fraction organique des émissions marines à partir de la chlorophylle-a montre que les organiques marins contribuent à moins de 2% des AO. L'évaluation du modèle montre l'importance de la description des émissions des bateaux pour la modélisation des concentrations du sulfate et des AO. Cependant, les hypothèses faites dans la modélisation de la condensation/évaporation ont beaucoup d'impact sur les concentrations simulées de nitrate et d'ammonium (équilibre thermodynamique, état de mélange).Pendant les étés 2012 et 2013, les AO sont principalement d'origine biogénique, ce qui est bien reproduit par le modèle. Les mesures enregistrent d'importantes concentrations d'AO hautement oxydés et oxygénés. Pour que le modèle reproduire non seulement les concentrations, mais également les propriétés d’oxydation et d'hydrophilicité des AO, trois processus de
formation d'aérosols organiques secondaires (AOS) à partir de monoterpènes sont ajoutés au modèle: l'autoxidation qui induit la
formation de composés organiques d'extrêmement faible volatilité, un mécanisme de
formation du nitrate organique, et un mécanisme de
formation d'un produit d'oxydation de deuxième génération. Les états d'oxydation et d'oxygénation des AO à Ersa sont bien simulés en supposant de plus la
formation d'organosulfates. Des simulations hivernales montrent que les AO y sont principalement d'origine anthropique. Bien que les émissions des composés organiques semi-volatils et de volatilité intermédiaire (COVIS) qui sont manquants dans les inventaires d'émissions influencent peu les AO en été, leur influence est dominante en hiver. La contribution du secteur du…
Advisors/Committee Members: Kata sartelet, Karine (thesis director).
Subjects/Keywords: Aérosols; Formation; Méditerranée; Aerosol; Formation; Mediterranean
Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chrit, M. (2018). Formation des aérosols organiques et inorganiques en Méditerranée : Organic and inorganic aerosol formation in the Mediterranean. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2018PESC1027
Chicago Manual of Style (16th Edition):
Chrit, Mounir. “Formation des aérosols organiques et inorganiques en Méditerranée : Organic and inorganic aerosol formation in the Mediterranean.” 2018. Doctoral Dissertation, Université Paris-Est. Accessed December 14, 2019.
http://www.theses.fr/2018PESC1027.
MLA Handbook (7th Edition):
Chrit, Mounir. “Formation des aérosols organiques et inorganiques en Méditerranée : Organic and inorganic aerosol formation in the Mediterranean.” 2018. Web. 14 Dec 2019.
Vancouver:
Chrit M. Formation des aérosols organiques et inorganiques en Méditerranée : Organic and inorganic aerosol formation in the Mediterranean. [Internet] [Doctoral dissertation]. Université Paris-Est; 2018. [cited 2019 Dec 14].
Available from: http://www.theses.fr/2018PESC1027.
Council of Science Editors:
Chrit M. Formation des aérosols organiques et inorganiques en Méditerranée : Organic and inorganic aerosol formation in the Mediterranean. [Doctoral Dissertation]. Université Paris-Est; 2018. Available from: http://www.theses.fr/2018PESC1027
University of Waterloo
10.
Greene, Chad.
Galaxy Formation at Redshift ~0.75: A Low Mass Survey & The Role of Environment.
Degree: 2011, University of Waterloo
URL: http://hdl.handle.net/10012/6289
► The majority of galaxy formation studies which explore beyond local redshifts do not typically probe down to the dwarf galaxy stellar mass range of ∼…
(more)
▼ The majority of galaxy formation studies which explore beyond local redshifts do not typically probe down to the dwarf galaxy stellar mass range of ∼ 109 Msun . Thus trends in the observed evolution or characteristics of galaxy formation at a particular epoch are based upon populations of massive galaxies. However the currently favored Λ-Cold Dark Matter (Λ-CDM) theory is based upon hierarchical clustering and merging of lower mass systems, which proceed to make the higher mass, complex morphology of galaxies we observe. Thus it is clear that within the dwarf galaxy mass regime there should be a significant phase of galaxy formation and evolution. This work aims to uncover the influence of local environment on the formation and evolution of dwarf and massive galaxies beyond local redshift, probing down to a mass range lower than that which has been explored by previous studies.
A previously successful study titled the Redshift One LDSS-3 Emission line Survey (ROLES), released results for a redshift of z ∼ 1, which compared the [OII] luminosity and galaxy stellar mass functions ([OII] LF and GSMF respectively), star formation rate density (SFRD), and specific star formation rate (sSFR) relations, with a local SDSS dataset. This led to the expansion of the study to lower redshift (this work) which explored low stellar mass galaxies at a redshift of z ∼ 0.75. This follow-up study referred to as ROLES75 (z ∼ 0.75) targeted the same two deep fields explored by the z ∼ 1 study (GOODS-South, MS1054-03 FIRES), which have extensive public photometry. Low mass targets were selected for study by their K-magnitudes (22.5 < KAB < 24) leading to a dwarf mass range of 8.5 < Log(M∗/Msun) < 9.5, and which were most likely to be within our redshift range (0.62 < z < 0.885). Follow-up multi-object spectroscopy targeted the [OII]λ3727A emission line star formation tracer in these targets allowing us to identify and obtain secure spectroscopic redshifts, SED-fit stellar masses and observed [OII] luminosity calibrated star formation rates down to limits of Log(M∗/Msun) ∼ 8.85 and SFR ∼ 0.1 Msun/yr .
Science results presented here are similar to those published by the ROLES z ∼ 1 study, however we also studied the influence of the high versus low density environment in which the galaxy populations reside. This study confirmed that while the [OII] luminosity was higher in earlier times, environment does not influence galaxy formation at z ∼ 0.75. The faint-end slope of the [OII] LF, α ∼ 1.25 measured here, is also observed to become
increasingly more steep with increasing redshift. The [OII] luminous GSMF is observed to
not have significantly evolved since z ∼ 2.75, confirming the result of the previous ROLES work. However the impact of environment on the GSMF is apparent in the high mass end where the imprint of structure from the CDFS field enhances the stellar mass function above the field population. There is also weak evidence of a bi-modal [OII] luminous GSMF
indicated by an ‘upturn’ near ∼ 109 Msun in the low density field population.…
Subjects/Keywords: Galaxy Formation; Galaxy Environment; Star Formation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Greene, C. (2011). Galaxy Formation at Redshift ~0.75: A Low Mass Survey & The Role of Environment. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/6289
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):
Greene, Chad. “Galaxy Formation at Redshift ~0.75: A Low Mass Survey & The Role of Environment.” 2011. Thesis, University of Waterloo. Accessed December 14, 2019.
http://hdl.handle.net/10012/6289.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Greene, Chad. “Galaxy Formation at Redshift ~0.75: A Low Mass Survey & The Role of Environment.” 2011. Web. 14 Dec 2019.
Vancouver:
Greene C. Galaxy Formation at Redshift ~0.75: A Low Mass Survey & The Role of Environment. [Internet] [Thesis]. University of Waterloo; 2011. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/10012/6289.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Greene C. Galaxy Formation at Redshift ~0.75: A Low Mass Survey & The Role of Environment. [Thesis]. University of Waterloo; 2011. Available from: http://hdl.handle.net/10012/6289
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Minnesota
11.
Weisz, Daniel Ray.
The history of star formation in nearby dwarf galaxies.
Degree: PhD, Astrophysics, 2010, University of Minnesota
URL: http://purl.umn.edu/98366
► We present detailed analysis of color-magnitude diagrams (CMDs) of resolved stellar populations in nearby dwarf galaxies based on observations taken with the Hubble Space Telescope…
(more)
▼ We present detailed analysis of color-magnitude diagrams (CMDs) of resolved stellar
populations in nearby dwarf galaxies based on observations taken with the Hubble Space
Telescope (HST). From the positions of individual stars on a CMD, we are able to derive
the star formation histories (SFHs), i.e., the star formation rate (SFR) as a function
of time and metallicity, of the observed stellar populations. Specifically, we apply this
technique to a number of nearby dwarf galaxies to better understand the mechanisms
driving their evolution.
The ACS Nearby Galaxy Survey Treasury program (ANGST) provides multi-color
photometry of resolved stars in ∼ 60 nearby dwarf galaxies from images taken with HST,
This sample contains 12 dSph, 5 dwarf spiral, 28 dIrr, 12 dSph/dIrr (transition), and 3
tidal dwarf galaxies. The sample spans a range of ∼ 10 in MB and covers a wide range
of environments, from highly interacting to truly isolated. From the best fit lifetime
SFHs we find three significant results: (1) the average dwarf galaxy formed ∼ 60% of
its stars by z ∼ 2 and 70% of its stars by z ∼ 1, regardless of morphological type, (2)
the only statistically significant difference between the SFHs of different morphological
types is within the most recent 1 Gyr (excluding tidal dwarf galaxies), and (3) the SFHs
are complex and the mean values are inconsistent with simple SFH models, e.g., single
epoch SF or constant SFH. We find that an exponentially declining star formation
model with τ ∼ 6.4 Gyr provides a reasonable representation of the mean SFHs. The
dominance of the older stellar populations implies that the typical dwarf galaxy formed
most of its stars at times similar to more massive galaxies. The sample shows a strong
density-morphology relationship, i.e., the dSphs in the sample are less isolated than dIs.
We find that the transition from a gas-rich to gas-poor galaxy cannot be solely due to
internal mechanisms, e.g., stellar feedback, and is likely the result of external mechanisms,
e.g., ram pressure and tidal stripping and tidal forces. The average transition
dwarf galaxy is slightly less isolated and less gas-rich than the typical dwarf irregular.
From a comparison between the ANGST and Local Group dwarf galaxy SFHs, we find
consistency between the two samples, suggesting that the Local Group dwarf galaxies
are a good representation of the broader universe. Both samples show a similarly strong morphology-density relationship, further emphasizing the importance of environment in
dwarf galaxy evolution.
We then present the recent (. 1 Gyr) SFHs of nine M81 Group Dwarf Galaxies.
Comparing the SFHs, birthrate parameters, fraction of stars formed per time interval,
and spatial distribution of stellar components as a function of luminosity, we find only
minor differences in SF characteristics among the M81 Group dIs despite a wide range
of physical properties. We extend our comparison to select dIs in the Local Group
(LG), with similar quality photometry, and again find only minor…
Subjects/Keywords: Galaxy Evolution; Galaxy Formation; Star Formation; Astrophysics
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APA ·
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Manager
APA (6th Edition):
Weisz, D. R. (2010). The history of star formation in nearby dwarf galaxies. (Doctoral Dissertation). University of Minnesota. Retrieved from http://purl.umn.edu/98366
Chicago Manual of Style (16th Edition):
Weisz, Daniel Ray. “The history of star formation in nearby dwarf galaxies.” 2010. Doctoral Dissertation, University of Minnesota. Accessed December 14, 2019.
http://purl.umn.edu/98366.
MLA Handbook (7th Edition):
Weisz, Daniel Ray. “The history of star formation in nearby dwarf galaxies.” 2010. Web. 14 Dec 2019.
Vancouver:
Weisz DR. The history of star formation in nearby dwarf galaxies. [Internet] [Doctoral dissertation]. University of Minnesota; 2010. [cited 2019 Dec 14].
Available from: http://purl.umn.edu/98366.
Council of Science Editors:
Weisz DR. The history of star formation in nearby dwarf galaxies. [Doctoral Dissertation]. University of Minnesota; 2010. Available from: http://purl.umn.edu/98366
University of Illinois – Urbana-Champaign
12.
Lee, I-Jen.
Understanding star formation at early stages in the filamentary era.
Degree: PhD, 0333, 2013, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/44802
► This thesis presents a study of star formation at early stages in the filamentary era with a special focus on massive star and cluster formation.…
(more)
▼ This thesis presents a study of star
formation at early stages in the filamentary era with a special focus on massive star and cluster
formation. We first investigate the importance of filamentary structures in star
formation and
propose an observationally driven scenario for the evolution of filamentary structures from large-scale molecular clouds to small-scale circumstellar envelopes. In addition, as theories of star
formation have gradually shifted from individual, isolated objects to the
formation of clusters over the decade, we study the environment in the protocluster IRAS 05345+3157 to better understand the initial conditions for cluster
formation. With CS(2-1) observations using the Combined Array for Research in Millimeter-wave Astronomy (CARMA) observatory, we have identified seven dense gas cores in this region and discussed the role of initial turbulence. The gas cores require an external pressure of 10
8 K cm
-3 to be bound to form possible seeds for future protostars.
Furthermore, to understand massive star
formation, we study the structure and kinematics of nine starless cores in Orion. As two main models about massive star
formation, the turbulent core model and the competitive accretion model, predict different level of fragmentation in massive starless cores, our results from high angular resolution observations with CS(2-1) using CARMA show three to five fragments associated with each core, in a broad consistency with the models involving turbulent fragmentation.
The number of fragments suggest that magnetic fields may be playing a role in suppressing the fragmentation. Also, the spectral data from the IRAM CS(2-1) observations of several cores show consistency with a picture of converging flows along a filament toward the core center; these flows may be important in massive and cluster
formation. Our result does not fully support either the turbulent core scenario or the competitive accretion scenario.
Finally, we present the first results from the CARMA Large Area Star
Formation Survey (CLASSy) toward Serpens Main, NGC 1333, and Barnard 1.
The project provides an unique opportunity to study cold, dense gas structure at millimeter wavelengths from 1500 AU to a few parsecs.
The data reveal some exciting properties in morphological and kinematic structures for the first time,
and will be unveiling more underlying physics in the star
formation process in the future.
Advisors/Committee Members: Looney, Leslie W. (advisor), Looney, Leslie W. (Committee Chair), Crutcher, Richard M. (committee member), Mouschovias, T. Ch. (committee member), Wong, Tony (committee member).
Subjects/Keywords: Star formation; Massive stars; Protocluster formation
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lee, I. (2013). Understanding star formation at early stages in the filamentary era. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/44802
Chicago Manual of Style (16th Edition):
Lee, I-Jen. “Understanding star formation at early stages in the filamentary era.” 2013. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed December 14, 2019.
http://hdl.handle.net/2142/44802.
MLA Handbook (7th Edition):
Lee, I-Jen. “Understanding star formation at early stages in the filamentary era.” 2013. Web. 14 Dec 2019.
Vancouver:
Lee I. Understanding star formation at early stages in the filamentary era. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2013. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/2142/44802.
Council of Science Editors:
Lee I. Understanding star formation at early stages in the filamentary era. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2013. Available from: http://hdl.handle.net/2142/44802
13.
Franco, Mario Fernando.
Le "cœur, le talent et la doctrine" de Pietro Giordani dans la formation de Giacomo Leopardi : The "heart, the talent and the doctrine" of Pietro Giordani in the formation of Giacomo Leopardi.
Degree: Docteur es, ETUDES ROMANES spécialité Etudes italiennes, 2014, Université Paul Valéry – Montpellier III
URL: http://www.theses.fr/2014MON30076
► La problématique de cette thèse, à savoir la présence simultanée du trinôme "doctrine-esprit-cœur'' dans la relation Giordani-Leopardi a révélé, que le legs le plus important…
(more)
▼ La problématique de cette thèse, à savoir la présence simultanée du trinôme "doctrine-esprit-cœur'' dans la relation Giordani-Leopardi a révélé, que le legs le plus important de ce rapport doit être recherché dans ses aspects affectifs plus que dans une filiation de nature littéraire ou doctrinale. Giordani révèle à Leopardi une tradition de pensée "noble" par rapport à la monotonie du conformisme à travers lequel s'était développé le rapport entre intellectuels et pouvoir. À côté de la "noblesse" il y a aussi la composante de la "modernité", grâce à laquelle Giordani fut le promoteur d'idées innovantes, accordant aux jeunes gens une grande confiance et poussant à l'extrême les conséquences d'une "nouvelle" conception de la réalité comme un langage apte à l'interpréter même dans les traits les plus secrets et incertains de l'esprit. On peut alors affirmer qu'un tel langage "moderne" est celui qui a été défini comme le "langage du cœur" et dont, pour une partie considérable, l'avènement a été rendu possible grâce à la correspondance entre les deux amis. Les possibles parallélismes existentiels en présence concourent à créer ce ressenti commun qui se transmet dans la dimension littéraire et culturelle. La communauté d'idées et la syntonie qui émergent à partir de 1817 et qui perdurent jusque dans les années 1820 va progressivement diminuer en intensité sans toutefois s'éteindre totalement. Il est indubitable que lorsque Leopardi réussit finalement à s'éloigner de Recanati, la tension si pressante à l'égard de son ami (sa fenêtre sur le monde) se relâche. Cela est humainement explicable par le fait que, comme Leopardi avait enfin l'occasion d'élargir son propre horizon d'une manière indépendante, il ressentait moins le besoin de le faire par le biais de sa relation avec Giordani. C'est dans la dimension affective que doit être recherchée la vocation originale de ce rapport, même sous l'aspect de l'engagement civil et littéraire: le don de l'amitié et l'attention fraternelle réciproque, même si, chez Giordani, nous pouvons parler d'une attention "paternelle", ne sont pas des oripeaux qui viseraient à embellir ou à enrichir le rapport entre les deux lettrés, mais ils constituent plutôt la sève même dont se nourrit un tel rapport. Leopardi ne voit pas seulement en Giordani un mentor plus âgé et plus mûr auquel il pouvait confier ses propres secrets et ses pensées les plus intimes. À l'inverse, tous deux ressentent la tension qui les pousse vers une pensée "rebelle", une dimension "autre" de la réflexion humaine par rapport aux "coordonnées" réactionnaires et à l'excessive dérive rationaliste de la raison. Cette rébellion les rapproche et leur permet de s'inscrire dans la lignée la plus pure des "anciens" qui étaient non seulement porteurs de ces valeurs à partir desquelles mesurer les tensions intellectuelles et morales, mais aussi dépositaires de cette étincelle du "doute" générant une vision beaucoup plus complexe de l'individu que ni le rationalisme, ni le psychologisme romantique, ne pouvaient percevoir avec clarté.…
Advisors/Committee Members: Zaouchi-Razgallah, Rawdha (thesis director), Carminati, Myriam (thesis director).
Subjects/Keywords: Talent; Doctrine; Formation; Talent; Doctrine; Formation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Franco, M. F. (2014). Le "cœur, le talent et la doctrine" de Pietro Giordani dans la formation de Giacomo Leopardi : The "heart, the talent and the doctrine" of Pietro Giordani in the formation of Giacomo Leopardi. (Doctoral Dissertation). Université Paul Valéry – Montpellier III. Retrieved from http://www.theses.fr/2014MON30076
Chicago Manual of Style (16th Edition):
Franco, Mario Fernando. “Le "cœur, le talent et la doctrine" de Pietro Giordani dans la formation de Giacomo Leopardi : The "heart, the talent and the doctrine" of Pietro Giordani in the formation of Giacomo Leopardi.” 2014. Doctoral Dissertation, Université Paul Valéry – Montpellier III. Accessed December 14, 2019.
http://www.theses.fr/2014MON30076.
MLA Handbook (7th Edition):
Franco, Mario Fernando. “Le "cœur, le talent et la doctrine" de Pietro Giordani dans la formation de Giacomo Leopardi : The "heart, the talent and the doctrine" of Pietro Giordani in the formation of Giacomo Leopardi.” 2014. Web. 14 Dec 2019.
Vancouver:
Franco MF. Le "cœur, le talent et la doctrine" de Pietro Giordani dans la formation de Giacomo Leopardi : The "heart, the talent and the doctrine" of Pietro Giordani in the formation of Giacomo Leopardi. [Internet] [Doctoral dissertation]. Université Paul Valéry – Montpellier III; 2014. [cited 2019 Dec 14].
Available from: http://www.theses.fr/2014MON30076.
Council of Science Editors:
Franco MF. Le "cœur, le talent et la doctrine" de Pietro Giordani dans la formation de Giacomo Leopardi : The "heart, the talent and the doctrine" of Pietro Giordani in the formation of Giacomo Leopardi. [Doctoral Dissertation]. Université Paul Valéry – Montpellier III; 2014. Available from: http://www.theses.fr/2014MON30076
University of Arizona
14.
Sheehan, Patrick Duffy.
Planet Formation In the Early Stages of Star Formation
.
Degree: 2017, University of Arizona
URL: http://hdl.handle.net/10150/625877
► Recent studies suggest that many protoplanetary disks around pre-main sequence stars with inferred ages of 1-5 Myr (known as Class II protostars) may contain insufficient…
(more)
▼ Recent studies suggest that many protoplanetary disks around pre-main sequence stars with inferred ages of 1-5 Myr (known as Class II protostars) may contain insufficient mass to form giant planets. This may be because by this stage much of the material in the disk has already grown into larger bodies, hiding the material from sight. If this is the case, then these older disks may not be an accurate representation of the initial mass budget in disks for forming planets. To test this hypothesis, I have observed a sample of protostars in the Taurus star forming regions identified as Class I in multiple independent surveys, whose young (<1 Myr old) disks are more likely to represent the initial mass budget of protoplanetary disks. For my dissertation I have used detailed radiative transfer modeling of a multi-wavelength dataset to determine the geometry of the circumstellar material and measure the mass of the disks around these protostars. I discuss how the inferred disk mass distribution for this sample compares with results for the existing 1-5 Myr old disk samples, and what these results imply for giant planet
formation. Next, I discuss the cases of three separate, individual Class I protostars discovered through my ongoing survey of Class I protostars whose disks are all of particular interest, each for its own reasons. Each of these disks may provide clues that even at the young ages of Class I protostars, planet
formation may already be well underway in their disks. Finally, large disk mass surveys of large star forming regions like the Orion Nebula Cluster may be contaminated by free-free emission from disks that are being photoevaporated by nearby massive stars. I discuss my work with the VLA to constrain the free-free emission spectra for these sources so that current and future millimeter surveys can accurately measure disk masses in the ONC.
Advisors/Committee Members: Eisner, Josh (advisor), Eisner, Josh (committeemember), Marrone, Dan (committeemember), Rieke, George (committeemember), Shirley, Yancy (committeemember), Youdin, Andrew (committeemember).
Subjects/Keywords: planet formation;
protoplanetary disks;
star formation
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APA (6th Edition):
Sheehan, P. D. (2017). Planet Formation In the Early Stages of Star Formation
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/625877
Chicago Manual of Style (16th Edition):
Sheehan, Patrick Duffy. “Planet Formation In the Early Stages of Star Formation
.” 2017. Doctoral Dissertation, University of Arizona. Accessed December 14, 2019.
http://hdl.handle.net/10150/625877.
MLA Handbook (7th Edition):
Sheehan, Patrick Duffy. “Planet Formation In the Early Stages of Star Formation
.” 2017. Web. 14 Dec 2019.
Vancouver:
Sheehan PD. Planet Formation In the Early Stages of Star Formation
. [Internet] [Doctoral dissertation]. University of Arizona; 2017. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/10150/625877.
Council of Science Editors:
Sheehan PD. Planet Formation In the Early Stages of Star Formation
. [Doctoral Dissertation]. University of Arizona; 2017. Available from: http://hdl.handle.net/10150/625877
Texas A&M University
15.
Rady, Ayten Khaled Mohamed Abdelhalim.
Formation Damage Due To Iron Precpitation In Limestone, Dolomite and Sandstone Cores.
Degree: MS, Petroleum Engineering, 2016, Texas A&M University
URL: http://hdl.handle.net/1969.1/157118
► Formation damage due to iron precipitation continues to be a major problem in the oil field. Research has established that as the pH of injected…
(more)
▼ Formation damage due to iron precipitation continues to be a major problem in the oil field. Research has established that as the pH of injected acid increases, iron (III) ions start to precipitate and block the pores in the
formation, significantly reducing production. However, where exactly this iron precipitates and how iron precipitation changes with different lithologies has not yet been comprehensively studied.
Coreflood experiments were conducted on carobonate (calcite and dolomite) and sandstone cores to assess the effects of temperature and iron concentrations on the degree of damage caused by iron precipitation during an acid job. The temperature values tested were 200 and 300?F. Iron concentrations ranging from 5,000 to 10,000 ppm were used. The core effluent samples were analyzed by ICP (Inductively Coupled Plasma) to measure the concentrations of key cations.
Coreflood experiments, revealed that iron precipitates across the entire core. Iron precipitation was severely detrimental in sandstone cores compared to those composed of calcite and dolomite. While limestone cores showed the least
formation damage from iron precipitation, coreflood tests indicated that as the iron concentration increases, the damage was more evident. On the other hand, increasing the temperature adversely affected sandstone and dolomite cores, but improved the final permeability of limestone cores.
In this study, the location of the iron precipitation is determined for three different lithologies. The effects of different parameters are studied to determine the best conditions that would lead to a decrease in iron precipitation and hence prevent
formation damage. Iron control agents are not always needed, as previously thought.
Advisors/Committee Members: Nasr-El-Din, Hisham (advisor), El-Halwagi, Mahmoud (committee member), Schubert , Jerome (committee member).
Subjects/Keywords: iron
formation
damage
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APA (6th Edition):
Rady, A. K. M. A. (2016). Formation Damage Due To Iron Precpitation In Limestone, Dolomite and Sandstone Cores. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/157118
Chicago Manual of Style (16th Edition):
Rady, Ayten Khaled Mohamed Abdelhalim. “Formation Damage Due To Iron Precpitation In Limestone, Dolomite and Sandstone Cores.” 2016. Masters Thesis, Texas A&M University. Accessed December 14, 2019.
http://hdl.handle.net/1969.1/157118.
MLA Handbook (7th Edition):
Rady, Ayten Khaled Mohamed Abdelhalim. “Formation Damage Due To Iron Precpitation In Limestone, Dolomite and Sandstone Cores.” 2016. Web. 14 Dec 2019.
Vancouver:
Rady AKMA. Formation Damage Due To Iron Precpitation In Limestone, Dolomite and Sandstone Cores. [Internet] [Masters thesis]. Texas A&M University; 2016. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/1969.1/157118.
Council of Science Editors:
Rady AKMA. Formation Damage Due To Iron Precpitation In Limestone, Dolomite and Sandstone Cores. [Masters Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/157118
University of Alberta
16.
Shivhare, Shishir.
A study of the rheology, stability and pore blocking ability
of non-aqueous colloidal gas aphron drilling fluids.
Degree: MS, Department of Civil and Environmental
Engineering, 2011, University of Alberta
URL: https://era.library.ualberta.ca/files/2b88qc96d
► Colloidal gas aphrons (CGAs) recently used as part of water-based drilling fluids have been found effective in controlling the filtration rate by bridging the pores…
(more)
▼ Colloidal gas aphrons (CGAs) recently used as part of
water-based drilling fluids have been found effective in
controlling the filtration rate by bridging the pores of the
reservoir rock and therefore, reducing the formation damage. This
research aims to generate colloidal gas aphrons (CGA) in oil based
drilling fluids; to study stability, rheology and the filtration
loss characteristics of CGAs and to investigate formation damage
properties of CGAs as a drilling fluid. Aphrons were generated in
mineral oil using a polymer-surfactant mix. Based on how changing
the polymer and surfactant concentration affects the
physico-chemical characteristics of the fluid, an optimum
formulation for the aphron drilling fluid was suggested. The
stability of microbubbles was investigated by looking at the
effects of time, temperature and pressure on the aphron yield and
bubble size distribution. Effects of temperature and pressure on
the density of the oil-based aphron fluids have been investigated.
Based on the PVT analysis results, an equation of state was
proposed. Finally, the performance of the oil-based aphron fluid in
porous media was investigated. The effects of changing the CGA
fluid injection rate, the type of saturating fluid and the
wettability of the porous media on the pressure drop were examined.
An assessment of the formation damage following the oil-based CGA
fluid injection was also made.
Subjects/Keywords: aphron; formation damage
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Shivhare, S. (2011). A study of the rheology, stability and pore blocking ability
of non-aqueous colloidal gas aphron drilling fluids. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/2b88qc96d
Chicago Manual of Style (16th Edition):
Shivhare, Shishir. “A study of the rheology, stability and pore blocking ability
of non-aqueous colloidal gas aphron drilling fluids.” 2011. Masters Thesis, University of Alberta. Accessed December 14, 2019.
https://era.library.ualberta.ca/files/2b88qc96d.
MLA Handbook (7th Edition):
Shivhare, Shishir. “A study of the rheology, stability and pore blocking ability
of non-aqueous colloidal gas aphron drilling fluids.” 2011. Web. 14 Dec 2019.
Vancouver:
Shivhare S. A study of the rheology, stability and pore blocking ability
of non-aqueous colloidal gas aphron drilling fluids. [Internet] [Masters thesis]. University of Alberta; 2011. [cited 2019 Dec 14].
Available from: https://era.library.ualberta.ca/files/2b88qc96d.
Council of Science Editors:
Shivhare S. A study of the rheology, stability and pore blocking ability
of non-aqueous colloidal gas aphron drilling fluids. [Masters Thesis]. University of Alberta; 2011. Available from: https://era.library.ualberta.ca/files/2b88qc96d
Texas A&M University
17.
Amin, Shahin.
Intergrated Rock Classification In Organic-Rich Mudrocks: A Case Study On Eagle Ford Formation.
Degree: 2017, Texas A&M University
URL: http://hdl.handle.net/1969.1/161554
► Formation evaluation and production design are often challenging in organic-rich mudrocks due to complexities in petrophysical and compositional properties as well as post-depositional hydrocarbon generating…
(more)
▼ Formation evaluation and production design are often challenging in organic-rich mudrocks due to complexities in petrophysical and compositional properties as well as post-depositional hydrocarbon generating mechanisms such as thermal maturation over time. Petrophysical parameters such as porosity, permeability and fluid saturations are important but not sufficient to fully characterize organic-rich mudrocks. Thus, integration of geomechanical, geological, geochemical, and petrophysical characterization is critical to enhance production from these formations. This paper focuses on an integrated rock classification applied in two wells in the oil-window of the Eagle Ford Shale play in South Texas. The lower Eagle Ford interval is an organic-rich fossiliferous marine shale deposited in Late Cretaceous.
Initially, we classified the rocks based on geological texture and geochemical properties measured at the lower Eagle Ford (LEF) in a well where conventional core was available. Then, I performed a joint inversion of triple-combo, spectral gamma ray, and elemental capture spectroscopy (ECS) logs in both wells to estimate depth-by-depth volumetric concentrations of minerals, porosity, and fluid saturations. The rocks were separated into five petrophysical classes using these results. In the absence of acoustic measurements in Well 1, I used concentrations and shape (i.e., aspect ratio) of minerals as inputs to the Self-consistent Approximation (SCA) model to estimate depth-by-depth effective elastic properties such as Young's Modulus (YM), Poisson?s Ratio (PR), and minimum horizontal stress (MHS) gradient. Finally, I conducted a geomechanical iii classification, and divided the rocks in the LEF into three categories: low-stress, medium-stress and high-stress, based on the MHS gradient.
The introduced well-log-based petrophysical and geomechanical rock classification was applied to the pilot section of two oil-producing wells located approximately 20 miles apart. Both wells were drilled horizontally with lateral lengths greater than 5,000 ft, and were hydraulically fractured. Petrophysical evaluation showed similar organic content (4.5- 5.0 wt%), porosity (7.0%), and total volumetric concentration of clays (10-15 vol%) in the target intervals of both wells. However, in comparison of well productivity, Well 1 produced an additional 11,000 barrels of oil equivalent (BOE) with a total hydrocarbon production of 54,000 BOE in the first 90 days after completions, approximately 25% more than Well 2 (43,000 BOE total). Geomechanical rock classification results showed lower MHS average values in Well 1, than in Well 2 (0.58 psi/ft vs. 0.62 psi/ft, respectively), and a higher proportion of completion-quality (low-stress) rock types in Well 1 relative to Well 2 (55% vs. 34% respective).
Results suggest that the well-by-well difference in production cannot be explained by only relying on the estimated petrophysical properties of the
formation. Higher productivity of Well 1 may result from greater hydraulic fracture extent, and…
Advisors/Committee Members: Ayres, Walter (advisor), Heidari, Zoya (advisor), Pereira, Juan Carlos Laya (committee member).
Subjects/Keywords: Petrophysics; Formation evaluation
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Amin, S. (2017). Intergrated Rock Classification In Organic-Rich Mudrocks: A Case Study On Eagle Ford Formation. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161554
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):
Amin, Shahin. “Intergrated Rock Classification In Organic-Rich Mudrocks: A Case Study On Eagle Ford Formation.” 2017. Thesis, Texas A&M University. Accessed December 14, 2019.
http://hdl.handle.net/1969.1/161554.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Amin, Shahin. “Intergrated Rock Classification In Organic-Rich Mudrocks: A Case Study On Eagle Ford Formation.” 2017. Web. 14 Dec 2019.
Vancouver:
Amin S. Intergrated Rock Classification In Organic-Rich Mudrocks: A Case Study On Eagle Ford Formation. [Internet] [Thesis]. Texas A&M University; 2017. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/1969.1/161554.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Amin S. Intergrated Rock Classification In Organic-Rich Mudrocks: A Case Study On Eagle Ford Formation. [Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/161554
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Hong Kong
18.
Ling, Jesse.
Reactions of epoxy and aziridinyl enolsilanes with
arenes.
Degree: PhD, 2017, University of Hong Kong
URL: http://hdl.handle.net/10722/249199
► Epoxy/aziridinyl enolsilanes that undergo (4+3) cycloaddition with traditional dienes, such as furan and cyclopentadiene, have now been demonstrated to undergo diastereoelective Friedel–Crafts alkylation, and (4+3)…
(more)
▼ Epoxy/aziridinyl enolsilanes that undergo (4+3)
cycloaddition with traditional dienes, such as furan and
cyclopentadiene, have now been demonstrated to undergo
diastereoelective Friedel–Crafts alkylation, and (4+3)
cycloaddition with arenes. Benzene substrates 2.10–2.16, 2.19,
2.24, 2.25–2.27 underwent Friedel–Crafts cyclizations with
exclusive trans-diastereoselectivities in moderate to good yields,
in which the best yields occur with electron-rich arenes. The
alkylation products conserve the optical purity of the epoxide or
aziridine. This method may be applied to the synthesis of optically
enriched β-hydroxyl-α-arylketones and β-amino-α-arylketones.
By blocking the ortho-position and altering the tether length,
epoxy/aziridinyl enolsilane tethered arene substrates have been
induced to undergo dearomatizing (4+3) cycloadditions. This
cycloaddition occurred for substrates 2.15, 2.18, 3.39–3.47,
3.52–3.56, and in some cases, with excellent yield and
diastereoselectivity. The diastereoselectivity has been
rationalized in terms of steric effects. This reaction transforms
arenes, sourced from the petrochemical industry, to highly
functionalized polycyclic scaffolds, and is among the most
synthetically useful (4+3) cycloadditions of arenes reported to
date.
The reaction scope of epoxy enolsilanes has been
extended to some open dienes. Mechanistic studies with open diene
substrates 4.58–4.63 revealed that intramolecular (4+3)
cycloadditions with epoxy/aziridinyl enolsilanes probably proceed
by a stepwise, formal cycloaddition mechanism. These open diene
substrates reacted to form a variety of products, ranging from
(4+3) cycloadducts, (3+2) cycloadducts, to alkylation products, and
each can be rationalized to have been derived from a common
carbocation intermediate from stepwise bond formation. This
conclusion also finds support from computational studies. It was
also demonstrated that conformationally flexible dienes are
disfavoured for (4+3) cycloaddition, and that the diene being
locked in an s-cis conformation is a prerequisite, accounting for
the successful (4+3) cycloadditions of traditional dienes such as
furan, cyclopentadiene, and bis-methylene cyclohexane .
In their
own right, open diene substrates undergo intramolecular (3+2)
cycloadditions favourably to generate stereochemically defined
hydrindane systems.
published_or_final_version
Chemistry
Doctoral
Doctor of Philosophy
Advisors/Committee Members: Chiu, P.
Subjects/Keywords: Ring formation (Chemistry)
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APA ·
Chicago ·
MLA ·
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Manager
APA (6th Edition):
Ling, J. (2017). Reactions of epoxy and aziridinyl enolsilanes with
arenes. (Doctoral Dissertation). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/249199
Chicago Manual of Style (16th Edition):
Ling, Jesse. “Reactions of epoxy and aziridinyl enolsilanes with
arenes.” 2017. Doctoral Dissertation, University of Hong Kong. Accessed December 14, 2019.
http://hdl.handle.net/10722/249199.
MLA Handbook (7th Edition):
Ling, Jesse. “Reactions of epoxy and aziridinyl enolsilanes with
arenes.” 2017. Web. 14 Dec 2019.
Vancouver:
Ling J. Reactions of epoxy and aziridinyl enolsilanes with
arenes. [Internet] [Doctoral dissertation]. University of Hong Kong; 2017. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/10722/249199.
Council of Science Editors:
Ling J. Reactions of epoxy and aziridinyl enolsilanes with
arenes. [Doctoral Dissertation]. University of Hong Kong; 2017. Available from: http://hdl.handle.net/10722/249199
University of Dayton
19.
Stanley, Daniel C.
Experiments in Vortex Formation of Plunging & Flapping
Flat Plates.
Degree: MS(M.S.), Aerospace Engineering, 2008, University of Dayton
URL: http://rave.ohiolink.edu/etdc/view?acc_num=dayton1229703269
► Reynolds number, Strouhal number, and formation number are insufficient to quantify the flow properties of a flapping wing system. These parameters do not take…
(more)
▼ Reynolds number, Strouhal number, and
formation number are insufficient to quantify the flow properties
of a flapping wing system. These parameters do not take enough
information from the input variables into account. As part of the
current study, the velocity profile and angle of attack were varied
during a single pure plunge flapping stroke using an infinite
aspect ratio flat plate. Although the velocity profile was either a
constant velocity or quarter-sine velocity, the average Reynolds
number was held constant at 3000. Strong differences in the flow
structure, both qualitatively and quantitatively, were obtained. A
new metric is proposed that is able to take these differences in
the input variables into account. This metric utilizes the theory
of maximum work potential and statistical regressions of the
experimental data in order to obtain a model of the experimental
parameter space. With this model, estimates of the desired outputs
can be made given values for the inputs. The main
portion of this study focuses on the differences in flow structure,
using qualitative and quantitative techniques, due to finite aspect
ratio and flapping about a hinge point. Data at various spanwise
and chordwise locations were taken in order to analyze the leading
edge, trailing edge, and tip vortices. A small study was also
conducted on the effects of changing Reynolds
number. It was found that for the infinite aspect
ratio plate, using a quarter-sine velocity profile, instead of a
constant velocity profile, enhances the production of circulation.
Operating at a slight angle of attack (85° instead of 90°) also
enhances circulation production; however, operating at a large
angle of attack (60° instead of 90°) has the opposite effect due to
pinch-off of both the leading and trailing edge vortices. Hinging
the wing at the root and using a finite aspect ratio causes the
constant velocity profile to produce higher values of circulation
than the quarter-sine velocity profile. This trend is the opposite
of that seen for the infinite aspect ratio cases. It was also found
that flapping in this highly three-dimensional manner greatly
hinders the production of circulation as compared to the infinite
aspect ratio, pure plunge experiments.
Advisors/Committee Members: Altman, Aaron (Advisor).
Subjects/Keywords: Fluid Dynamics; vortex formation; low Reynolds number fluid dynamics; formation parameter; formation time; formation number
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Stanley, D. C. (2008). Experiments in Vortex Formation of Plunging & Flapping
Flat Plates. (Masters Thesis). University of Dayton. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=dayton1229703269
Chicago Manual of Style (16th Edition):
Stanley, Daniel C. “Experiments in Vortex Formation of Plunging & Flapping
Flat Plates.” 2008. Masters Thesis, University of Dayton. Accessed December 14, 2019.
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1229703269.
MLA Handbook (7th Edition):
Stanley, Daniel C. “Experiments in Vortex Formation of Plunging & Flapping
Flat Plates.” 2008. Web. 14 Dec 2019.
Vancouver:
Stanley DC. Experiments in Vortex Formation of Plunging & Flapping
Flat Plates. [Internet] [Masters thesis]. University of Dayton; 2008. [cited 2019 Dec 14].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=dayton1229703269.
Council of Science Editors:
Stanley DC. Experiments in Vortex Formation of Plunging & Flapping
Flat Plates. [Masters Thesis]. University of Dayton; 2008. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=dayton1229703269
University of Illinois – Chicago
20.
McCallough, Christopher Lee.
Up-Regulated Scr Expression in the Drosophila Prothoracic Leg is Regulated by Two Cis-Regulatory Elements.
Degree: 2016, University of Illinois – Chicago
URL: http://hdl.handle.net/10027/21579
► The Drosophila Hox gene Sex combs reduced (Scr) functions during embryonic development to specify regional identity along the anterior/posterior (A/P) axis which is well-studied. Scr…
(more)
▼ The Drosophila Hox gene Sex combs reduced (Scr) functions during embryonic development to specify regional identity along the anterior/posterior (A/P) axis which is well-studied. Scr also functions to specify the morphology of the prothoracic leg specifically the bristle pattern of the leg which is not well studied. This work examines the genetic regulation of Scr and two cis-regulatory modules (CRMs) that direct the expression of Scr. The expression of up-regulate Scr is regulated along all three axis in the prothoracic leg. This study shows that the transcription factors Dachshund (Dac) and Distalless (Dll) activate Scr expression along the Proximal/Distal (Pr/Di) axis and Bric-a-brac (Bab) refines the distal edge. Decapentaplegic (Dpp), Wingless (Wg) and Engralied refine the expression of Scr along the A/P and Dorsal/Ventral (D/V) axes to the anterior-ventral region of the prothoracic leg. This up-regulated expression of Scr is regulated by two cis-regulatory elements (CRM), one intronic CRM and one CRM 5’ to the Scr transcription start site. The intronic CRM directs expression in the transverse row (T-row) bristle primordium with the 5’ CRM directing expression in the T-row and sex comb primordium. A smaller sub clone of the 5’ CRM, E fragment, fully recapitulates the up-regulated Scr expression and contains punitive binding sites for Dpp, En and Bab.
Advisors/Committee Members: Orenic, Teresa (advisor).
Subjects/Keywords: Pattern formation; Development
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APA (6th Edition):
McCallough, C. L. (2016). Up-Regulated Scr Expression in the Drosophila Prothoracic Leg is Regulated by Two Cis-Regulatory Elements. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/21579
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):
McCallough, Christopher Lee. “Up-Regulated Scr Expression in the Drosophila Prothoracic Leg is Regulated by Two Cis-Regulatory Elements.” 2016. Thesis, University of Illinois – Chicago. Accessed December 14, 2019.
http://hdl.handle.net/10027/21579.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
McCallough, Christopher Lee. “Up-Regulated Scr Expression in the Drosophila Prothoracic Leg is Regulated by Two Cis-Regulatory Elements.” 2016. Web. 14 Dec 2019.
Vancouver:
McCallough CL. Up-Regulated Scr Expression in the Drosophila Prothoracic Leg is Regulated by Two Cis-Regulatory Elements. [Internet] [Thesis]. University of Illinois – Chicago; 2016. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/10027/21579.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
McCallough CL. Up-Regulated Scr Expression in the Drosophila Prothoracic Leg is Regulated by Two Cis-Regulatory Elements. [Thesis]. University of Illinois – Chicago; 2016. Available from: http://hdl.handle.net/10027/21579
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
21.
Dumet, Thomas.
Illettrisme et formation de base : l'épreuve des contradictions : Functional illiteracy and adult basic education : the test of contradictions.
Degree: Docteur es, Sciences de l'éducation, 2009, Université Lille I – Sciences et Technologies
URL: http://www.theses.fr/2009LIL12008
► Ce travail développe la thèse selon laquelle l’illettrisme opère, dans sa dimension typique, l’individualisation d’une possible contradiction collective liée à l’emploi et à l’activité professionnelle.…
(more)
▼ Ce travail développe la thèse selon laquelle l’illettrisme opère, dans sa dimension typique, l’individualisation d’une possible contradiction collective liée à l’emploi et à l’activité professionnelle. La forme typique de la lutte contre l’illettrisme incarne alors un moyen de faciliter, pour les personnes concernées, le dépassement de contradictions individuelles. En se basant sur une étude de cas, l’auteur montre comment une formation peut être mise au service de ce dépassement. A partir de cette étude, c’est aussi la diversité des parcours de formation et la dualité de l’enseignement et de l’apprentissage qui transparaissent.
This work develops the thesis that functional illiteracy is, in its ideal type, a way to individualize a contradiction linked to work otherwise this contradiction might have been collective. In this typical form, adult basic education is, for those who are concerned, a way to conquer individual contradictions. Based on a case study, analyses show how training enables or facilitates this. This case study also shows the diversity of training courses, and the duality of teaching and learning.
Advisors/Committee Members: Leclercq, Véronique (thesis director).
Subjects/Keywords: Parcours de formation
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APA (6th Edition):
Dumet, T. (2009). Illettrisme et formation de base : l'épreuve des contradictions : Functional illiteracy and adult basic education : the test of contradictions. (Doctoral Dissertation). Université Lille I – Sciences et Technologies. Retrieved from http://www.theses.fr/2009LIL12008
Chicago Manual of Style (16th Edition):
Dumet, Thomas. “Illettrisme et formation de base : l'épreuve des contradictions : Functional illiteracy and adult basic education : the test of contradictions.” 2009. Doctoral Dissertation, Université Lille I – Sciences et Technologies. Accessed December 14, 2019.
http://www.theses.fr/2009LIL12008.
MLA Handbook (7th Edition):
Dumet, Thomas. “Illettrisme et formation de base : l'épreuve des contradictions : Functional illiteracy and adult basic education : the test of contradictions.” 2009. Web. 14 Dec 2019.
Vancouver:
Dumet T. Illettrisme et formation de base : l'épreuve des contradictions : Functional illiteracy and adult basic education : the test of contradictions. [Internet] [Doctoral dissertation]. Université Lille I – Sciences et Technologies; 2009. [cited 2019 Dec 14].
Available from: http://www.theses.fr/2009LIL12008.
Council of Science Editors:
Dumet T. Illettrisme et formation de base : l'épreuve des contradictions : Functional illiteracy and adult basic education : the test of contradictions. [Doctoral Dissertation]. Université Lille I – Sciences et Technologies; 2009. Available from: http://www.theses.fr/2009LIL12008
University of Adelaide
22.
Nguyen, Thi Kim Phuong.
Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs.
Degree: 2011, University of Adelaide
URL: http://hdl.handle.net/2440/70889
► This thesis is dedicated to the development of new technologies for sweep improvement due to plugging of highly permeable channels and layers by injected or…
(more)
▼ This thesis is dedicated to the development of new technologies for sweep improvement due to plugging of highly permeable channels and layers by injected or lifted or mobilized fines particles. The following methods of improved waterflood have been proposed in the thesis:
• Injection of raw or poorly treated water with consequent homogenization of the injectivity profile due to distributed along the well skin factor.
• Injection of low salinity or fresh water resulting in lifting of reservoir fines, their migration and further capture by the rock with permeability reduction and redirection of the injected water into unswept area.
• Injection of sweet water into watered-up abandoned wells during pressure blowdown in oil and gas reservoirs with strong water support.
In the above three cases, the proposal of the new technologies was backed by detailed reservoir simulations. In all cases, the application of the proposed improved oil recovery technology, as forecasted by reservoir simulation, leads to 3-15% of incremental recovery and 2-3 times decrease of the amount of produced and injected water. The technology of raw water injection was developed using Eclipse waterflood BlackOil simulator with modelling of injectivity decline along the well due to plugging of porous media by injected particles. A new numerical procedure describing skin growth with time in each section of long horizontal wells have been developed and implemented into BlackOil Eclipse model. Different configurations of horizontal injectors and producers have been modelled resulting in production forecast with raw waterflooding.
The technology of low salinity water injection have been developed using Eclipse reservoir modelling with polymer injection option, which can describe mobilization of fines particles, their migration, capture and subsequent permeability decline. The main physics mechanism of incremental oil recovery found is the diversion of the injected water into unswept zones due to plugging the swept zone by capture particles. The incremental recovery, as obtained by reservoir simulation, is 12%. It may also result in 2 to 3 times decrease in water injection and production. The proposal of a new technology of small bank of fresh water injection into watered-up and abandoned production wells result in lifting of reservoir fines,
their migration and plugging the path for invaded aquifer water. It results in decrease of water production and prolongation of oil or gas production from wells.
Advisors/Committee Members: Bedrikovetski, Pavel (advisor), Haghighi, Manouchehr (advisor), Australian School of Petroleum (school).
Subjects/Keywords: simulations; formation damage
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APA (6th Edition):
Nguyen, T. K. P. (2011). Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/70889
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nguyen, Thi Kim Phuong. “Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs.” 2011. Thesis, University of Adelaide. Accessed December 14, 2019.
http://hdl.handle.net/2440/70889.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nguyen, Thi Kim Phuong. “Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs.” 2011. Web. 14 Dec 2019.
Vancouver:
Nguyen TKP. Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs. [Internet] [Thesis]. University of Adelaide; 2011. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/2440/70889.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nguyen TKP. Reservoir simulation studies of formation damage for improved recovery on oil-gas reservoirs. [Thesis]. University of Adelaide; 2011. Available from: http://hdl.handle.net/2440/70889
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Victoria University of Wellington
23.
Marques Conde da Silva, João Ricardo.
Cement / rock interaction in geothermal wells.
Degree: 2014, Victoria University of Wellington
URL: http://hdl.handle.net/10063/3506
► One of the main issues associated with the exploitation of geothermal energy is the durability of the cement that is used downhole to cement the…
(more)
▼ One of the main issues associated with the exploitation of geothermal energy is the durability of the cement that is used downhole to cement the steel casing to the
formation. Cement durability can have a major impact on the lifetime of geothermal wells, which do not usually last as long as desirable. The cement formulations used in the construction of geothermal wells are designed to provide mechanical support to the metallic well casings and protect them against the downhole harsh environment, which often leads to corrosion.
This research is focused on the way that these formulations interact with the surrounding rock
formation in geothermal environments, and aims to understand whether these are likely to affect the cement durability and, consequently, the geothermal well lifetime.
The experimental work in this thesis consists of examining the changes in the interfacial transition zone (ITZ) that forms between geothermal cements and the volcanic rocks, after hydrothermal treatment. Holes were drilled in blocks of volcanic rocks and cement slurries with distinct formulations were poured into the cavities. The assemblages were autoclaved under typical geothermal conditions. The main variables under study were the cement formulation, the temperature of curing (150°C and 290°C), the presence of drilling mud, CO₂ exposure and the type of rock.
The results show that with all the Portland cement based systems a series of chemical reactions occur at the interface between the cement and the rock, the ITZ, where migration of Ca²⁺ and OH⁻ ions occurs from the cement into the rock pores. These reactions are ongoing, which occur faster during the first days/few weeks of curing, mostly driven by physical process of cement movement into the rock, followed by a slower second stage, controlled mostly by chemical driving forces.
This work highlights the interdependence between the chemical and physical interactions between geothermal cements and volcanic rocks which are complex. Variables such as temperature and time of curing and silica addition affect the cement phases that form, while the amount of amorphous silica and rock permeability dictate the extent of rock interaction. The presence of carbon dioxide influences the extent of rock/cement interaction and this can be controlled by the rock permeability and cement formulation. Consequently, most of the above mentioned variables were found to have an impact on the geothermal cement durability, which depends on the way these factors are combined.
Advisors/Committee Members: Milestone, Neil, Johnston, James.
Subjects/Keywords: Cement; Geothermal; Formation
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APA (6th Edition):
Marques Conde da Silva, J. R. (2014). Cement / rock interaction in geothermal wells. (Doctoral Dissertation). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/3506
Chicago Manual of Style (16th Edition):
Marques Conde da Silva, João Ricardo. “Cement / rock interaction in geothermal wells.” 2014. Doctoral Dissertation, Victoria University of Wellington. Accessed December 14, 2019.
http://hdl.handle.net/10063/3506.
MLA Handbook (7th Edition):
Marques Conde da Silva, João Ricardo. “Cement / rock interaction in geothermal wells.” 2014. Web. 14 Dec 2019.
Vancouver:
Marques Conde da Silva JR. Cement / rock interaction in geothermal wells. [Internet] [Doctoral dissertation]. Victoria University of Wellington; 2014. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/10063/3506.
Council of Science Editors:
Marques Conde da Silva JR. Cement / rock interaction in geothermal wells. [Doctoral Dissertation]. Victoria University of Wellington; 2014. Available from: http://hdl.handle.net/10063/3506
University of Rochester
24.
Shi, Shanshan.
Deletion of Tak1 in Fibroblast-specific Protein 1
Positive Cells Reduces Tendon Adhesion Formation Via Reduced
Myofibroblast Activation.
Degree: PhD, 2015, University of Rochester
URL: http://hdl.handle.net/1802/29358
► The clinical outcomes of flexor tendon injury repairs are frequently complicated by extensive scar formation that impairs hand functions. Fibrotic scars contain myofibroblasts that produce…
(more)
▼ The clinical outcomes of flexor tendon injury
repairs are frequently complicated
by extensive scar formation
that impairs hand functions. Fibrotic scars contain
myofibroblasts
that produce excessive extracellular matrix proteins such as
collagen I
and collagen III. TGFβ, a potent activator of
fibroblasts has been implicated in tendon
adhesion formation.
Though studies targeting components of the TGFβ signaling
pathway
have shown effective reduction in adhesion formations, little
progress has been
made in translating these findings from bench to
bedside due to our limited knowledge
of the precise role of TGFβ
signaling during tendon healing. TGFβ regulates target
genes
through multiple mechanisms. In particular, TGFβ-Activated Kinase 1
(TAK1), a
MAP Kinase Kinase Kinase which is a component of the
TGFβ receptor complex, can
activate p38 MAP Kinase and JNK. In
current study, we employed both in vitro and in
vivo approaches to
investigate the role of TAK1 in regulation of tendon injury
repair.
Specifically, we utilized a murine model of primary tendon
repair in which Tak1 is
conditionally deleted in fibroblasts using
the Fsp1-Cre transgene with the Tak1 floxed
allele. In vitro, we
investigated the role of TAK1 in regulation of fibroblast
proliferation, migration, contraction, and collagen production. We
found that upon
injury, Fsp1-lineage cells populated the
reparative tissues at the injury site while native
tendon tissue
did not have any Fsp1-positive cells. Histology showed reduced
scar
formation in Fsp1cre;Tak1fx/fx mice during tendon healing
beginning at day 7.
Consistent with histology, Fsp1cre;Tak1fx/fx
mice had improved range of motion in
tendon repairs and reduced
expression of collagen I and III throughout the repair
process.
Tendon repairs in Fsp1cre;Tak1fx/fx mice also had reduced
expression of
Acta2, a marker for myofibroblasts, suggesting that
TAK1 is involved in fibroblast
activation. Inhibition of TAK1
reduces the transformation of fibroblasts to
myofibroblasts
following TGFβ1 treatment of fibroblasts in vitro. Tak1 deletion
in
TGFβ1-treated fibroblasts resulted in decreased expression of
Acta2. Several other key
functions of activated myofibroblasts,
such as proliferation, migration, contraction, and
collagen
production were also inhibited by the loss of Tak1. Additionally,
we found
that addition of TGFβ1 to fibroblast cell cultures
enhanced the activation and nuclear
accumulation of β-catenin. In
contrast, Tak1 deletion in MEF cultures resulted in
decreased
myofibroblast gene expression and reduced activation of
Wnt/β-catenin
signaling. These analyses demonstrate that TAK1 is a
critical mediator in tendon
adhesion formation and fibroblast to
myofibroblast conversion. Inhibition of Tak1
could serve as novel
approach for therapeutic intervention for the treatment of
adhesion
formation. TAK1 links TGFβ and β-catenin signaling during
the development of
fibrotic responses after tendon
injury.
Subjects/Keywords: Tendon; Scar Formation
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Shi, S. (2015). Deletion of Tak1 in Fibroblast-specific Protein 1
Positive Cells Reduces Tendon Adhesion Formation Via Reduced
Myofibroblast Activation. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/29358
Chicago Manual of Style (16th Edition):
Shi, Shanshan. “Deletion of Tak1 in Fibroblast-specific Protein 1
Positive Cells Reduces Tendon Adhesion Formation Via Reduced
Myofibroblast Activation.” 2015. Doctoral Dissertation, University of Rochester. Accessed December 14, 2019.
http://hdl.handle.net/1802/29358.
MLA Handbook (7th Edition):
Shi, Shanshan. “Deletion of Tak1 in Fibroblast-specific Protein 1
Positive Cells Reduces Tendon Adhesion Formation Via Reduced
Myofibroblast Activation.” 2015. Web. 14 Dec 2019.
Vancouver:
Shi S. Deletion of Tak1 in Fibroblast-specific Protein 1
Positive Cells Reduces Tendon Adhesion Formation Via Reduced
Myofibroblast Activation. [Internet] [Doctoral dissertation]. University of Rochester; 2015. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/1802/29358.
Council of Science Editors:
Shi S. Deletion of Tak1 in Fibroblast-specific Protein 1
Positive Cells Reduces Tendon Adhesion Formation Via Reduced
Myofibroblast Activation. [Doctoral Dissertation]. University of Rochester; 2015. Available from: http://hdl.handle.net/1802/29358
25.
Sahaab, Abdalratha.
Paleoenvironmental conditions and diagenetic evolution of the mishrif formation (Nasiriyah oil field, Iraq) : Les conditions paléo-environnementales et l'évolution diagénétique de la formation de Mishrif (le champ pétrolifère de Nassiriya, Irak).
Degree: Docteur es, Géosciences, 2017, Université Lille I – Sciences et Technologies
URL: http://www.theses.fr/2017LIL10196
► Le but de cette étude est de comprendre les relations entre les roches carbonatées et les paléofluides qui les traversent. Les études paléogéographiques et les…
(more)
▼ Le but de cette étude est de comprendre les relations entre les roches carbonatées et les paléofluides qui les traversent. Les études paléogéographiques et les descriptions géologiques ainsi que les analyses géochimiques des roches réservoirs ont été réalisées sur la Formation de Mishrif dans le champ pétrolier de Nasiriya (sud-est de l’Iraq). Les données de 5 forages carrotés (NS-1 à NS-5), les rapports de prospections et les données de production du champ de Nassiriya, ont été utilisés. Les analyses des microfaciès montrent que la Formation de Mishrif contient une grande variété d’organismes tels que des formaminifères, des coraux, des rudites ainsi que des algues, microbialites, des pellets, des peloides, des grains aggrégé et des grains arrondis. Par conséquent, la formation de Mishrif serait représentative d’un environnement d’eau de subsurface de la zone évaporitique jusqu’à la zone de récif arrière. Le système de transport des fluides dans la Formation de Mishrif se fait au travers des réseaux de stylolite, des fractures ainsi que du réseau poral. Les inclusions des fluides aqueuses sont composées du système H2O-MgCl2. Les températures homogènes des inclusions des fluides aqueuses varient entre 150 et 175 °C. Les températures homogènes des inclusions des fluides pétrolières représentent les degrés élevés de 225 à 250 °C. Les processus de cimentation indiquent quatre phases d’évènements. La première phase a eu lieu avant la migration d’hydrocarbure. La seconde phase s’est produite pendant la migration de ces hydrocarbures. La troisième phase arrive après le processus de migration. Enfin, la quatrième phase est représentée par la distribution du bitume.
The aim of the present study is related to understand the paleofluid-rock interactions in carbonate rocks and its relation with oil potential during upper Cretaceous. Paleogeography studies, geological descriptions and geochemistry analyses of the reservoir rocks were conducted on the Mishrif Formation of the Nasiriah oil field (south-east of Iraq). The data of drill cores from 5 drillholes (NS-1 to NS-5), exploration reports and production data of the Nasiriyah oil field have been used. The microfacies analyses show that Mishrif includes foraminifera, coral, ruddiest, algae, microbialite, favreina microcoprolite, pellets, peloids, aggregate grains and rounded clastic grains. Therefore, shallow-water environments represent Mishrif paleoenvironments, included evaporitic zone to the back-reef zone of the interior carbonate platform shelf. Transport system in the Mishrif contains stylolite networks, fractures and porosity systems. The scanning electron microscope (SEM) shows the balanced distribution of the transport systems regardless of the microfacies type. The aqueous fluid inclusions are mainly composed of H2O-MgCl2 system. Homogeneous temperatures of the aqueous fluid inclusions range from 150 to 175°C. Homogeneous temperatures of the petroleum fluid inclusions in the latter fractures represent high degrees from 225 up to 250°C. Cementation process exhibits…
Advisors/Committee Members: Gauthier, Arnaud (thesis director), Dubois, Michel (thesis director).
Subjects/Keywords: Formation Mishrif; 553.28
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sahaab, A. (2017). Paleoenvironmental conditions and diagenetic evolution of the mishrif formation (Nasiriyah oil field, Iraq) : Les conditions paléo-environnementales et l'évolution diagénétique de la formation de Mishrif (le champ pétrolifère de Nassiriya, Irak). (Doctoral Dissertation). Université Lille I – Sciences et Technologies. Retrieved from http://www.theses.fr/2017LIL10196
Chicago Manual of Style (16th Edition):
Sahaab, Abdalratha. “Paleoenvironmental conditions and diagenetic evolution of the mishrif formation (Nasiriyah oil field, Iraq) : Les conditions paléo-environnementales et l'évolution diagénétique de la formation de Mishrif (le champ pétrolifère de Nassiriya, Irak).” 2017. Doctoral Dissertation, Université Lille I – Sciences et Technologies. Accessed December 14, 2019.
http://www.theses.fr/2017LIL10196.
MLA Handbook (7th Edition):
Sahaab, Abdalratha. “Paleoenvironmental conditions and diagenetic evolution of the mishrif formation (Nasiriyah oil field, Iraq) : Les conditions paléo-environnementales et l'évolution diagénétique de la formation de Mishrif (le champ pétrolifère de Nassiriya, Irak).” 2017. Web. 14 Dec 2019.
Vancouver:
Sahaab A. Paleoenvironmental conditions and diagenetic evolution of the mishrif formation (Nasiriyah oil field, Iraq) : Les conditions paléo-environnementales et l'évolution diagénétique de la formation de Mishrif (le champ pétrolifère de Nassiriya, Irak). [Internet] [Doctoral dissertation]. Université Lille I – Sciences et Technologies; 2017. [cited 2019 Dec 14].
Available from: http://www.theses.fr/2017LIL10196.
Council of Science Editors:
Sahaab A. Paleoenvironmental conditions and diagenetic evolution of the mishrif formation (Nasiriyah oil field, Iraq) : Les conditions paléo-environnementales et l'évolution diagénétique de la formation de Mishrif (le champ pétrolifère de Nassiriya, Irak). [Doctoral Dissertation]. Université Lille I – Sciences et Technologies; 2017. Available from: http://www.theses.fr/2017LIL10196
26.
Sebade, Matthew J.
The depositional environment and diagenetic effects on sand bodies within the unconventional resource play of the Spearfish Formation (triassic) in north central North Dakota.
Degree: MS, Geology, 2014, University of North Dakota
URL: https://commons.und.edu/theses/271
► The Triassic Spearfish Formation in North Dakota is comprised of three members, the Belfield, Pine, and Saude Members, in ascending order. This study focuses…
(more)
▼ The Triassic Spearfish
Formation in North Dakota is comprised of three members, the Belfield, Pine, and Saude Members, in ascending order. This study focuses on the Saude Member in north-central North Dakota on the eastern margin of the Williston basin. Both the upper and lower contacts of the Spearfish in the study area are unconformable. In this region, the lateral distribution of red sandstone and argillaceous siltstone lithofacies were mapped using well log data. Four sandstone bodies were identified then mapped across the region using gamma ray logs. Sandstone bodies in descending order are the A sand, B sand, water sand, and basal sand. The six lithofacies identified are: A) Friable immature paleosol, B) Mottled to massive, quartz wacke siltstone, C) Laminated to massive, siltstone to fine grained sandstone that is a lithic wacke or quartz wacke, D) Laminated to mottled, very fine to medium grained quartz wacke, E) Mottled to massive, quartz wacke siltstone with sandstone lenses, and F) Massive to laminated, poorly sorted sandstone which is a quartz wacke, quartz arenite, lithic arenite, or wacke sandstone. From mapping and core descriptions sandstone deposition is dominant in the lower two thirds of the
formation. Sandstones pinch out against the basal unconformity and stratigraphically higher sandstones onlap further east indicating a transgressive nature for the system. Sandstones and siltstones of the Spearfish
Formation were deposited across the low dipping broad plain of the eastern margin of the Williston basin. The basal sand is a transgressive sand unit that is deposited in paleographic lows formed on the Mississippian unconformity. These paleogeographic lows were formed through small river incision and irregular erosional surfaces from exposure. Following this transgression the Triassic seas reached a stillstand and siltstones and sandstones of the Spearfish prograded across the basin margin. The fluctuations between argillaceous and sandstone rich units are generated from stillstands during the overall transgression of the Triassic sea. Within the sand bodies a stacking pattern of fining-upward sequences is observed. Sedimentary structures within these stacked patterns includes climbing ripples, varying cross-beds, bi-directional ripples with mud drapes, in-phase ripples, paleosols, laminar bedding, ripples, and rip-up clasts. The interpretation of these structures and their stacking pattern indicates a subtidal to supratidal environment for the
formation and more specifically for the sand units. The Spearfish
Formation is a transgressive system tract that onlaps to the northeast with prograding sandstone units throughout the basin, during times of relative sea level still stands. Petrographical analysis noted eogenesis and mesogenesis diagenetic alterations. Eogenesis alterations included nodular anhydrite
formation from displacive growth of gypsum crystals in argillaceous sections. Minor quartz overgrowths were observed along with dolomitization of the upper half of the…
Advisors/Committee Members: R.D. LeFever.
Subjects/Keywords: Sandstone – Spearfish Formation; Siltstone – Spearfish Formation; Diagenesis – Spearfish Formation; Geology
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sebade, M. J. (2014). The depositional environment and diagenetic effects on sand bodies within the unconventional resource play of the Spearfish Formation (triassic) in north central North Dakota. (Masters Thesis). University of North Dakota. Retrieved from https://commons.und.edu/theses/271
Chicago Manual of Style (16th Edition):
Sebade, Matthew J. “The depositional environment and diagenetic effects on sand bodies within the unconventional resource play of the Spearfish Formation (triassic) in north central North Dakota.” 2014. Masters Thesis, University of North Dakota. Accessed December 14, 2019.
https://commons.und.edu/theses/271.
MLA Handbook (7th Edition):
Sebade, Matthew J. “The depositional environment and diagenetic effects on sand bodies within the unconventional resource play of the Spearfish Formation (triassic) in north central North Dakota.” 2014. Web. 14 Dec 2019.
Vancouver:
Sebade MJ. The depositional environment and diagenetic effects on sand bodies within the unconventional resource play of the Spearfish Formation (triassic) in north central North Dakota. [Internet] [Masters thesis]. University of North Dakota; 2014. [cited 2019 Dec 14].
Available from: https://commons.und.edu/theses/271.
Council of Science Editors:
Sebade MJ. The depositional environment and diagenetic effects on sand bodies within the unconventional resource play of the Spearfish Formation (triassic) in north central North Dakota. [Masters Thesis]. University of North Dakota; 2014. Available from: https://commons.und.edu/theses/271
Université du Québec à Montréal
27.
Masmoudi, Yousr.
La formation du compagnon dans le programme d'apprentissage en milieu de travail.
Degree: 2008, Université du Québec à Montréal
URL: http://www.archipel.uqam.ca/1142/1/M10294.pdf
► La présente recherche est de type qualitatif et de nature exploratoire. Elle rend compte des représentations des comités sectoriels de la main d'oeuvre (CSMO) au…
(more)
▼ La présente recherche est de type qualitatif et de nature exploratoire. Elle rend compte des représentations des comités sectoriels de la main d'oeuvre (CSMO) au sujet de la formation pédagogique des compagnons dans le cadre du programme d'apprentissage en milieu de travail (PAMT). Cette recherche s'articule autour de trois axes: le PAMT, le compagnon et la formation pédagogique des compagnons. L'apprentissage en milieu de travail est une pratique traditionnelle, aussi ancienne que l'existence des métiers. Cependant, cette pratique a connu à travers les siècles et les systèmes de formation professionnelle plusieurs rebondissements, retracés brièvement dans cette recherche. L'apprentissage en milieu de travail est de plus en plus structuré et reconnu par une certification des compétences. Le PAMT repose sur le compagnonnage. Le compagnonnage existe depuis très longtemps, et il est encore de grande actualité puisqu'il est à la base du PAMT. Ce nouveau programme d'apprentissage en milieu de travail implanté en 2002 dans les entreprises québécoises suscite la participation active de plusieurs partenaires dont celle des CSMO.
L'échantillon choisi pour la collecte des données est de type « raisonné ». Il est constitué de huit CSMO représentés par quatre femmes et quatre hommes issus des secteurs d'activités primaire, secondaire et tertiaire. Ces huit CSMO sont les seuls sur les vingt neuf existants à avoir organisé et donné une formation aux compagnons dans le cadre du PAMT en 2004-2005. Les huit personnes interviewées ont été désignées comme celles qui ont en charge le dossier du PAMT. Elles ont partagé leur vécu de l'implantation du PAMT ainsi que celui de l'organisation de la formation du compagnon. Ellcs ont parlé de l'importance qu'elles accordaient à la formation du compagnon pour bien le préparer au rôle qui lui est attribué dans le PAMT. Elles ont spécifié la nature du contenu de la formation, le type d'intervenants et des experts sollicités pour outiller le compagnon pour son rôle dans un processus d'apprentissage. Elles ont décrit les outils élaborés propres au milieu du travail et destinés à leurs compagnons. L'analyse des données recueillies a permis de déterminer la représentation des CSMO du compagnon dans le cadre du PAMT, comme un expert dans son milieu capable de transmettre son métier et possédant des habiletés de communication et de coaching. Par conséquent, les CSMO ont exprimé le besoin de développer des outils stimulant les compétences des compagnons en relations humaines et en communication. Les CSMO ont aussi inclus dans leur formation, l'utilisation d'outils concernant les notions de santé et de sécurité ainsi que des fiches techniques de contenus variés pour aider les compagnons dans leur rôle. Les CSMO dans leur majorité, s'entendent pour dire que la formation en compagnonnage a pour objectif principal la préparation du compagnon afin qu'il puisse jouer son rôle en milieu de travail et qu'il puisse utiliser les outils fournis (carnet d'apprentissage et guide du compagnon) par le PAMT.…
Subjects/Keywords: Formation en entreprise; Programme de formation; Milieu de travail; Formation en cours d'emploi; Formation professionnelle; Animateur de formation; Québec (Province)
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APA (6th Edition):
Masmoudi, Y. (2008). La formation du compagnon dans le programme d'apprentissage en milieu de travail. (Thesis). Université du Québec à Montréal. Retrieved from http://www.archipel.uqam.ca/1142/1/M10294.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Masmoudi, Yousr. “La formation du compagnon dans le programme d'apprentissage en milieu de travail.” 2008. Thesis, Université du Québec à Montréal. Accessed December 14, 2019.
http://www.archipel.uqam.ca/1142/1/M10294.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Masmoudi, Yousr. “La formation du compagnon dans le programme d'apprentissage en milieu de travail.” 2008. Web. 14 Dec 2019.
Vancouver:
Masmoudi Y. La formation du compagnon dans le programme d'apprentissage en milieu de travail. [Internet] [Thesis]. Université du Québec à Montréal; 2008. [cited 2019 Dec 14].
Available from: http://www.archipel.uqam.ca/1142/1/M10294.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Masmoudi Y. La formation du compagnon dans le programme d'apprentissage en milieu de travail. [Thesis]. Université du Québec à Montréal; 2008. Available from: http://www.archipel.uqam.ca/1142/1/M10294.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Université de Sherbrooke
28.
Gagnon, Claudia.
Arrimage des pratiques éducatives d'enseignants et de formateurs en entreprises en contexte d'alternance études de cas en formation professionnelle agricole
.
Degree: 2008, Université de Sherbrooke
URL: http://savoirs.usherbrooke.ca/handle/11143/933
► En formation professionnelle agricole au Québec, dans un contexte où les formations en alternance sont privilégiées pour favoriser la réussite, la question de l'arrimage entre…
(more)
▼ En
formation professionnelle agricole au Québec, dans un contexte où les formations en alternance sont privilégiées pour favoriser la réussite, la question de l'arrimage entre les pratiques éducatives des enseignants et celles des formateurs en entreprises est posée. Dans une perspective compréhensive de la recherche s'appuyant sur la stratégie de l'étude de cas, l'arrimage a été abordé selon trois points de vue: (1) à travers une séquence école-stage-école; (2) à travers les systèmes de pratiques professionnelles propres à chaque intervenant et (3) à travers le déroulement de pratiques spécifiques que sont les pratiques d'enseignement à l'école et les pratiques de
formation en entreprise. L'analyse de contenu des entrevues et des observations en classes et en entreprises fait notamment ressortir l'hétérogénéité des pratiques, l'importance de la structure scolaire en regard de l'alternance et de l'arrimage qu'elle permet, ainsi que certaines faiblesses concernant la didactique de l'alternance chez les enseignants et le guidage de l'activité chez les formateurs en entreprises. Ainsi, bien que, majoritairement, l'arrimage ne résulte pas d'une démarche volontaire de la part des formateurs en entreprise, il passe notamment par les objets, les lieux et les moyens de
formation, malgré un manque de temps évident, et repose essentiellement sur la planification rigoureuse des enseignants. Pour les enseignants, l'arrimage s'effectue à travers des pratiques formelles telles les pratiques d'enseignement et les pratiques de supervision, et à travers des pratiques informelles telles les pratiques de corridor. Dans les pratiques d'enseignement, l'arrimage consiste en l'apport continu de situations vécues par les élèves ou par les enseignants, et par des apports théoriques liés à la réalité en entreprise. Pour les formateurs en entreprise, l'arrimage s'effectue par la mise en action de l'élève dans un travail lié à la
formation à l'école, et par un minimum d'informations liées à la
formation à l'école.
Advisors/Committee Members: Deaudelin, Colette (advisor), Balleux, André (advisor).
Subjects/Keywords: Stage;
Formation agricole;
Formation en entreprise;
Pratiques enseignantes;
Pratiques éducatives;
Formation professionnelle;
Alternance
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
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APA (6th Edition):
Gagnon, C. (2008). Arrimage des pratiques éducatives d'enseignants et de formateurs en entreprises en contexte d'alternance études de cas en formation professionnelle agricole
. (Doctoral Dissertation). Université de Sherbrooke. Retrieved from http://savoirs.usherbrooke.ca/handle/11143/933
Chicago Manual of Style (16th Edition):
Gagnon, Claudia. “Arrimage des pratiques éducatives d'enseignants et de formateurs en entreprises en contexte d'alternance études de cas en formation professionnelle agricole
.” 2008. Doctoral Dissertation, Université de Sherbrooke. Accessed December 14, 2019.
http://savoirs.usherbrooke.ca/handle/11143/933.
MLA Handbook (7th Edition):
Gagnon, Claudia. “Arrimage des pratiques éducatives d'enseignants et de formateurs en entreprises en contexte d'alternance études de cas en formation professionnelle agricole
.” 2008. Web. 14 Dec 2019.
Vancouver:
Gagnon C. Arrimage des pratiques éducatives d'enseignants et de formateurs en entreprises en contexte d'alternance études de cas en formation professionnelle agricole
. [Internet] [Doctoral dissertation]. Université de Sherbrooke; 2008. [cited 2019 Dec 14].
Available from: http://savoirs.usherbrooke.ca/handle/11143/933.
Council of Science Editors:
Gagnon C. Arrimage des pratiques éducatives d'enseignants et de formateurs en entreprises en contexte d'alternance études de cas en formation professionnelle agricole
. [Doctoral Dissertation]. Université de Sherbrooke; 2008. Available from: http://savoirs.usherbrooke.ca/handle/11143/933
Dalhousie University
29.
Brown, Aidan I.
Fixed nitrogen dynamics and heterocyst patterning in
filamentous heterocystous cyanobacteria.
Degree: MS, Department of Physics & Atmospheric
Science, 2012, Dalhousie University
URL: http://hdl.handle.net/10222/15324
► Cyanobacteria are prokaryotes that can grow photoautotrophically using oxygenic photosynthesis. Some filamentous cyanobacteria in media with insufficient fixed nitrogen develop a regular pattern of heterocyst…
(more)
▼ Cyanobacteria are prokaryotes that can grow
photoautotrophically using oxygenic photosynthesis. Some
filamentous cyanobacteria in media with insufficient fixed nitrogen
develop a regular pattern of heterocyst cells that fix nitrogen for
the remaining vegetative cells. We have built an integrated
computational model of fixed nitrogen transport and cell growth for
filamentous cyanobacteria. With our model, two qualitatively
different experimentally observed nitrogen distributions between a
pair of heterocysts are reconciled. By adding dynamic heterocyst
placement into our model, we can optimize heterocyst frequency with
respect to growth. Further introduction of modest leakage leads to
distinct growth rates between different heterocyst placement
strategies. A local placement strategy yields maximal growth and
steady state heterocyst spacings similar to those observed
experimentally. Adding more realistic fixed nitrogen storage based
heterocyst commitment together with lateral inhibition to the model
allows us to address initial heterocyst commitment and
qualitatively reproduces many aspects of heterocyst
differentiation. We also investigate patterns of starving cells and
correlations of fixed nitrogen in filaments without heterocysts. We
find percolation transitions in both spatial one dimensional
patterns and space-time two dimensional patterns.
Advisors/Committee Members: none (external-examiner), Randall Martin (graduate-coordinator), Laurent Kreplak (thesis-reader), Manfred Jericho (thesis-reader), Andrew Rutenberg (thesis-supervisor), Not Applicable (ethics-approval), Not Applicable (manuscripts), Yes (copyright-release).
Subjects/Keywords: cyanobacteria; heterocysts; simulation; pattern formation
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CSE |
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APA (6th Edition):
Brown, A. I. (2012). Fixed nitrogen dynamics and heterocyst patterning in
filamentous heterocystous cyanobacteria. (Masters Thesis). Dalhousie University. Retrieved from http://hdl.handle.net/10222/15324
Chicago Manual of Style (16th Edition):
Brown, Aidan I. “Fixed nitrogen dynamics and heterocyst patterning in
filamentous heterocystous cyanobacteria.” 2012. Masters Thesis, Dalhousie University. Accessed December 14, 2019.
http://hdl.handle.net/10222/15324.
MLA Handbook (7th Edition):
Brown, Aidan I. “Fixed nitrogen dynamics and heterocyst patterning in
filamentous heterocystous cyanobacteria.” 2012. Web. 14 Dec 2019.
Vancouver:
Brown AI. Fixed nitrogen dynamics and heterocyst patterning in
filamentous heterocystous cyanobacteria. [Internet] [Masters thesis]. Dalhousie University; 2012. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/10222/15324.
Council of Science Editors:
Brown AI. Fixed nitrogen dynamics and heterocyst patterning in
filamentous heterocystous cyanobacteria. [Masters Thesis]. Dalhousie University; 2012. Available from: http://hdl.handle.net/10222/15324
University of Georgia
30.
Wheeler, Steven Edge.
Accurate thermochemistry of key soot formation intermediates.
Degree: PhD, Chemistry, 2006, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/wheeler_steven_e_200605_phd
► Precise enthalpies of formation of key soot formation intermediates C3H3, C4H3, and C4H5 have been determined through systematic extrapolations of ab initio energies within the…
(more)
▼ Precise enthalpies of
formation of key soot
formation intermediates C3H3, C4H3, and C4H5 have been determined through systematic extrapolations of ab initio energies within the focal point method of Allen and co-workers. Electron correlation has been accounted for using second-order Z-averaged perturbation theory (ZAPT2) and coupled cluster theory through full triple excitations [CCSD, CCSD(T), and CCSDT]. We have also explicitly examined the convergence of ZAPTn energies and predicted spectroscopic constants for a series of systems to compare it with more oft-applied restricted open-shell perturbation theories. The results offer justification for the inclusion of ZAPT2 energies as the leading correlation contribution in the focal point method over alternative perturbation theories in cases exhibiting spin-contamination and suggest ZAPT2 as the best available open-shell perturbation theory for routine applications. Based on the extrapolated results, recommended enthalpies of
formation are as follows: °°° H(propargyl) = 84.7, H(1-propynyl) = 126.6, H(cycloprop-1-enyl) = 125.7, f0f0f0°°°° H(cycloprop-2-enyl) = 117.3, H(i-C4H3) = 119.0, H(E-n-C4H3) = 130.8, H(i-f0f0f0f0–1°C4H5) = 78.4, and f0H(E-n-C4H5) = 89.1 kcal mol. These constitute the most reliable enthalpies presently available, and their incorporation into detailed kinetic models of soot
formation will allow for the development of more definitive models of PAH and soot
formation during combustion.
Advisors/Committee Members: Henry F. Schaefer, III.
Subjects/Keywords: soot formation
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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APA (6th Edition):
Wheeler, S. E. (2006). Accurate thermochemistry of key soot formation intermediates. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/wheeler_steven_e_200605_phd
Chicago Manual of Style (16th Edition):
Wheeler, Steven Edge. “Accurate thermochemistry of key soot formation intermediates.” 2006. Doctoral Dissertation, University of Georgia. Accessed December 14, 2019.
http://purl.galileo.usg.edu/uga_etd/wheeler_steven_e_200605_phd.
MLA Handbook (7th Edition):
Wheeler, Steven Edge. “Accurate thermochemistry of key soot formation intermediates.” 2006. Web. 14 Dec 2019.
Vancouver:
Wheeler SE. Accurate thermochemistry of key soot formation intermediates. [Internet] [Doctoral dissertation]. University of Georgia; 2006. [cited 2019 Dec 14].
Available from: http://purl.galileo.usg.edu/uga_etd/wheeler_steven_e_200605_phd.
Council of Science Editors:
Wheeler SE. Accurate thermochemistry of key soot formation intermediates. [Doctoral Dissertation]. University of Georgia; 2006. Available from: http://purl.galileo.usg.edu/uga_etd/wheeler_steven_e_200605_phd
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