• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 3622
  • 1232
  • 870
  • 415
  • 409
  • 158
  • 118
  • 117
  • 74
  • 52
  • 47
  • 36
  • 35
  • 32
  • 24
  • Tagged with
  • 8650
  • 1241
  • 845
  • 780
  • 641
  • 636
  • 597
  • 549
  • 490
  • 485
  • 464
  • 415
  • 397
  • 376
  • 367
  • 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

The structural chemistry of coordination compounds containing d-block or f-block metals

Sze-To, Lap., 司徒立. January 2010 (has links)
published_or_final_version / Chemistry / Doctoral / Doctor of Philosophy
22

Le comportement stratégique des petites entreprises dans un contexte de transition : cas du secteur laitier en Algérie / The strategic behaviour of the small firms in a transition context : the case of the dairy sector in Algeria

Lakhdari, Hakima 17 January 2011 (has links)
Cette recherche a pour objet d'identifier les comportements stratégiques des petites entreprises laitières algériennes dans un contexte de transition caractérisé par la concurrence. Elle montre également que les comportements stratégiques des petites entreprises laitières présentent des caractéristiques particulières, et sont susceptibles d'apporter une réponse au besoin de développement de cette petite structure. La méthodologie étant le système stratégique au travers l'étude de cas qualitative, une approche multicritère est adoptée. Permettre de mettre en lumière une série de résultats, d'une part, une typologie de trois types de comportement stratégique des petites entreprises laitières, d'autre part, a montré l'importance des variables environnementales et entrepreneuriales. Néanmoins l'analyse organisationnelle reste un point déterminant dans l'analyse des comportements stratégiques. Cette analyse a montré que la rentabilité des dix petites entreprises laitières est fortement tributaire de la matière première « poudre de lait ». Finalement cette thèse se pose entre autre la question de la spécificité de la petite entreprise en faisant de la variable entrepreneuriale un rôle central dans l'analyse stratégique / This research aims at identifying the strategic behaviours of the Algerian small dairy firms in a transition context. It also shows that the strategic behaviours of the small dairy firms present some specific characteristics and are likely to bring an answer to the need for development of this little structure. As methodology is the strategic system through a qualitative case study, a multi-criteria approach has been adopted. Highlighting a series of results on a one hand, and a typology of three types of strategic behaviours adopted by these small dairy firms on the other hand, has shown the importance of the environmental and entrepreneurial variables. Nevertheless, the organizational analysis is still a determining point in the analysis of strategic behaviours. This analysis has shown that the profitability of ten small dairy firms is largely dependent on the raw material that is dried milk. Finally, in this thesis, we are faced, amongst other things, with the specificity of the small company itself, giving a central role to the entrepreneurial variable in the strategic analysis
23

Etude de l'influence du PAI-1 matriciel sur la régulation de la transition Mésenchymo-Amiboïde des cellules cancéreuses / Study on the influence of matrix PAI-1 on the regulation of Mesenchymal-Amoeboid transition of cancer cells

Cartier-Michaud, Amandine 14 December 2010 (has links)
La transition cellulaire Mésenchymo-Amiboïde (MAT) est requise pour l’échappement métastasique, cependant elle n’a encore jamais été associée à une situation physiopathologique précise. PAI-1, l’inhibiteur de l’activateur du plasminogène de type-1, est une molécule du microenvironnement tumoral considérée comme facteur de mauvais pronostic et localisée en forte concentration autour des tumeurs les plus invasives. Nous montrons que, sous sa forme matricielle active, PAI-1 est capable d’entretenir, au cours du temps et de façon dose-dépendante, la morphologie amiboïde de cellules cancéreuses colorectales et mammaires, et que celle-ci est associée à une adhérence faible intégrines-indépendante, une migration de type amiboïde et à l’activation de la voie RhoA/ROCK-1/MLC-P. Le mécanisme moléculaire mis en jeu a partiellement été mis en évidence : nous montrons que l’immobilisation de PAI-1 et sa liaison à l’uPA sont indispensables, et nous suggérons la possibilité que le récepteur membranaire uPAR participe à la transmission de signaux maintenant la voie RhoA/ROCK-1/MLC-P active. La compatibilité des effets du PAI-1 matriciel vis-à-vis des principales voies de signalisation impliquées dans la régulation de la transition MAT est établie in silico grâce à une méthode fondée sur la modélisation de la dynamique des réseaux d’interactions. L’ensemble de ces résultats permet pour la première fois de caractériser une situation physiopathologique microenvironnementale favorable à la transition MAT ; et bien que la forme matricielle de PAI-1 n’ait pas encore livré tous ses secrets, elle semble être une cible thérapeutique intéressante. / The Mesenchymal-Amoeboid transition (MAT) is required for metastatic escape, however it has not been associated with a precise physiopathological requirement yet. PAI-1, type-1 plasminogen activator inhibitor, is a tumor matrix molecule considered as marker of bad prognosis and found in high amount in the most aggressive tumors. We show that, in its activated matrix form, PAI-1 is able to maintain, in time and with concentration-dependence, the amoeboid morphology of colorectal and mammary cancer cells, and that this one is associated with a weak integrin-independant adhesion, an amoeboid migration and the activation of RhoA/ROCK-1/MLC-P pathway. The involved molecular mechanism has been partially underlined: we show that immobilization of PAI-1 and its link with uPA are essential, and we assume that the membrane receptor uPAR participates in the transmission of signals maintaining activated the RhoA/ROCK-1/MLC-P pathway. The compatibility of matrix PAI-1 effects towards the main signaling pathways involved in MAT regulation is established in silico with a method based on the modeling of interaction network dynamics. All this results enable for the first time to characterize a matrix physiopathological situation supporting MAT; and although the matrix form of PAI-1 has not been revealed all its secrets yet, it seems to be an interesting therapeutic target.
24

Demarcating the Scope of a Handover Process

Khan, Ahmad Salman, Kajko-Mattsson, Mira January 2010 (has links)
Despite the fact that a handover process is just as frequently performed as any development process, little is known about it. Still, it is regarded as one of the lifecycle processes that is not well explored and defined. In this paper, we study the handover process within eighteen companies with the purpose of demarcating its scope within software lifecycle. Our goal is to find out how industry understands handover process and how it places it within software lifecycle. As a result, we have identified seven different scope contexts for the handover process. We have also provided evidence of its wide lifecycle span and its overlap with development, predelivery and postdelivery maintenance processes. / © 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Qc 20120223
25

Investigation in transition metal dihydrogen and dihydride chemistry /

Law, James Kirk, January 2001 (has links)
Thesis (Ph. D.)--University of Washington, 2001. / Vita. Includes bibliographical references (leaves 144-149).
26

Syntheses and reactivity studies of hydroxo-palladium(II) and amido-platinum(IV) complexes /

Getty, April D. January 2001 (has links)
Thesis (Ph. D.)--University of Washington, 2001. / Vita. Includes bibliographical references (leaves 185-195).
27

Electronic transitions of transition metal monoboride and monoxides

Wang, Na, 王娜 January 2014 (has links)
published_or_final_version / Chemistry / Doctoral / Doctor of Philosophy
28

Transition metal complexes of protoporphyrin IX formed by reaction with metals on clays

Klube, John Arthur, January 1976 (has links)
Thesis (M.S.)--South Dakota School of Mines and Technology, Rapid City, 1976. / Vita. Includes abstract. Includes bibliographical references (leaf 29). Also issued in print.
29

Excited states and electrical properties of Fe(III) and V(IV) clusters

Zipse, David. Dalal, Naresh. January 2004 (has links)
Thesis (Ph. D.)--Florida State University, 2004. / Advisor: Dr. Naresh Dalal, Florida State University, College of Arts and Sciences, Dept. of Chemistry and Biochemistry. Title and description from dissertation home page (Jan. 19, 2005). Includes bibliographical references.
30

Transition metal complexes of protoporphyrin IX formed by reaction with metals on clays

Klube, John Arthur, January 1976 (has links)
Thesis (M.S.)--South Dakota School of Mines and Technology, Rapid City, 1976. / Vita. Includes abstract. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf 29).

Page generated in 0.1174 seconds