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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Essays on solid waste management the impact of user fees /

Ferrara, Ida. January 1998 (has links)
Thesis (Ph. D.)--York University, 1998. Graduate Programme in Economics. / Typescript. Includes bibliographical references (leaves 177-182). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pNQ39265.
22

Essays on environmental tax policy analysis dynamic computable general equilibrium approaches applied to China /

Cao, Jing. January 2007 (has links)
Thesis (Ph.D.)--Harvard University, 2007. / Adviser: Dale W. Jorgenson. Includes bibliographical references.
23

Essays on externalities and transport

Carlsson, Fredrik. January 1999 (has links)
Thesis (doctoral)--Göteborgs universitet, 1999. / Includes bibliographical references.
24

Development of a user cost estimation procedure for work zones /

Adams, Michael Roy, January 2005 (has links) (PDF)
Thesis (M.S.)--Brigham Young University. Dept. of Civil and Environmental Engineering, 2005. / Includes bibliographical references (leaves 135-138).
25

Electrical and thermal transport properties of polymer/carbonaceous nanostructured composites / Propriétés de transport électrique et thermique de composites (polymère/charges carbonneés) nanostructurés

Islam, Rakibul 18 October 2016 (has links)
Les polymères conducteurs composites présentent des propriétés thermoélectriques qui en font une solution prometteuse, peu coûteuse, propre et efficace pour la récupération de pertes de chaleur. L’objet de cette thèse est l’étude des propriétés de composites nanostructurés à base de polyaniline (PANI) en fonction de la concentration en nanoobjets: nanotubes de carbone (1-D) et oxyde de graphène réduit (RGO) (2-D). Leur structure et morphologie ont été étudiées par MEB, MET, diffraction des rayons X et diffusion Raman. Les conductivités électrique et thermique, le coefficient Seebeck, la figure de mérite thermoélectrique ZT, ont été mesurés. La conductivité électrique montre une augmentation importante avec la concentration en charges alors que la conductivité thermique ne croît que légèrement, ceci améliore ZT de plusieurs ordres de grandeur. L’effet de la dimensionnalité des charges a été mis en évidence. Mais quelle que soit cette dimension, la conductivité électrique contrairement à la conductivité thermique, suit un comportement de percolation à travers un processus de conduction à 2-D. Ce comportement a été également observé pour la capacité thermique volumique des nanohybrides PANI/RGO ce qui en fait des candidats potentiels dans le domaine des matériaux à haute capacité thermique. Leur facteur de stockage de chaleur est traité avec un nouveau modèle analytique. Les échantillons de PANI/RGO ont été étudiés par spectroscopie diélectrique à différentes températures. Les résultats font apparaître un phénomène intéressant de piégeage de charges à l’interface PANI/RGO qui pourrait trouver des applications dans les supercondensateurs et les mémoires électroniques. / Conducting polymer nanocomposites exhibit for instance interesting thermoelectric properties which make them a promising, inexpensive, clean and efficient solution for heat waste harvesting. This thesis reports on properties of polyaniline (PANI) nanostructured composites as a function of various carbonaceous nano-fillers content such as carbon nanotubes (1-D), and 2-D reduced graphene oxide (RGO). SEM, TEM, X-ray diffraction, and Raman spectroscopy have been employed to investigate their structure and morphology. Electrical and thermal conductivity, Seebeck coefficient, and thermoelectric figure of merit (ZT) have been systematically performed. An important increase of electrical conductivity has been observed with increasing filler fraction whereas thermal conductivity only slightly increases, which enhances ZT of several orders of magnitude. Fillers dimension effect is evidenced, but, whatever this dimension, it is shown that, in contrast with thermal conductivity, electrical conductivity follows a percolation behavior through 2D conduction process. This behavior is also observed in the case of the volumetric heat capacity of PANI/RGO nanohybrids which make them potential candidates as high heat capacitive materials. For the first time their heat storage factor is assessed with a new analytical model proposed in this study. The PANI/RGO samples have also been investigated by Dielectric Spectroscopy at different temperatures. Results evidence an interesting charge trapping phenomenon occurring at the PANI/RGO interface which might find promising applications in supercapacitors or gate memory devices.
26

Etude de la contribution du pilotage de charges à la fourniture de services aux réseaux électriques

Boëda, Didier 27 February 2009 (has links) (PDF)
Les réseaux électriques subissent actuellement des changements dus à la dérégulation du marché, à l'intégration de productions décentralisées et à l'augmentation de la consommation. En conséquence, ils vont subir plus de contraintes et les charges électriques seront amenées à contribuer à leur soulagement. Leur pilotage est donc envisagé pour participer à la conduite des réseaux et à la fourniture de services. Les travaux de cette thèse ont pour but de présenter des possibilités de pilotage de charges dans ce contexte en évolution. Les contributions des charges thermiques résidentielles et électroménagères à la gestion des conséquences d'incidents y sont évaluées. Ces études permettent de conclure que ces charges présentent un potentiel de pilotage intéressant aussi bien en contrôle prévisionnel qu'en contrôle en temps réel. Les résultats obtenus et la nouveauté de ce thème d'étude permettent d'envisager des travaux futurs vers l'élargissement des champs d'action avec d'autres charges à piloter et d'autres services à fournir.
27

Restructuring Charges: Do Investors Really Care?

Ramsey, Liberty Nicole 01 January 2017 (has links)
The decision to restructure a firm is very difficult for many companies because it often has a big impact on the company financially and culturally. Restructuring is often a necessary decision for firms in financial distress, and my research seeks to determine whether the market reacts positively or negatively to restructuring charges over time. Much research has been done to determine whether restructuring creates value for the company and increases future performance, but less has been done to determine the stock market reaction that comes as a result of restructuring. Prior literature suggests that restructuring is often a positive decision for companies, which led to my hypothesis that stock price would increase more in companies that had higher levels of restructuring charges over the period measured. I measured companies’ restructuring charges as a percent of operating income over a ten-year period and compared those percentages to the change in stock price over that same period. My results suggest that companies who did not restructure, or recognized lower levels of restructuring charges, had higher positive increases in stock price than those that had higher levels of restructuring charges. Because this result is contrary to much of the prior research, investors’ reaction to restructuring should continue to be studied.
28

Effect of drug loading and plasticizer on drug release from poly lactic acid film

Mokhtar, Mohamed January 2005 (has links)
Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.
29

An evaluation on 2007 obstetric service policy in Hong Kong a solution to the service-seeking behaviour of Mainland pregnant women? /

Shiu, Wan-yee, Ruby. January 2007 (has links)
Thesis (M. P. A.)--University of Hong Kong, 2007. / Title proper from title frame. Also available in printed format.
30

From Kurzweil-Henstock integration to charges in Euclidean spaces

Moonens, Laurent 11 April 2008 (has links)
An m charge in the n dimensional Euclidean space is a linear functional acting on m dimensional polyhedral chains and satisfying the following continuity condition. The value of the linear functional approaches zero on chains whose normal masses are bounded and whose flat norms asymptotically vanish. Our main theorem relates m charges to pairs of continuous differential forms. Luzin's theorem states that every measurable function on the line is the derivative of a continuous, almost everywhere differentiable function. We show this can be improved in several dimensions. Finally we prove that a compact subset C of the n dimensional Euclidean space does not support the distributional divergence of a bounded measurable vector field if and only if C has vanishing (n-1) dimensional Hausdorff measure.

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