• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 661
  • 656
  • 436
  • 120
  • 97
  • 79
  • 51
  • 45
  • 20
  • 17
  • 16
  • 16
  • 16
  • 13
  • 12
  • Tagged with
  • 2764
  • 902
  • 602
  • 541
  • 353
  • 297
  • 246
  • 239
  • 233
  • 201
  • 189
  • 172
  • 157
  • 154
  • 143
  • 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.
491

Transcending the Material Self: Reading Ghosts in Samuel Richardson's Novel Clarissa

Howard, Jeffrey G. 01 May 2013 (has links)
This thesis presents an analysis of the ghosts in Samuel Richardson’s 1747-48 novel Clarissa, and synthesizes traditional literary criticism on that novel with British folklore and ghost traditions. It examines the novel historically and demonstrates that Richardson’s novelistic approach changed between 1740 when he wrote Pamela and 1747 when he began writing Clarissa in that he relies on the ghost image to discuss the complexities of individual identity. In Clarissa, Richardson outdoes his previous attempt at depicting reality in Pamela because his use of the ghost motif allows the audience to see beyond the physical reality of the plot into the spiritual depths of the human heart. Clarissa involves the journey of a young woman attempting to establish a sense of identity and selfhood, and the ghosts of the novel supply a lens for interpreting her course toward a sense of self that transcends the material world, its wants, its objectives, its myriad institutions, and the identity she has constructed by association with those entities.
492

A Novel and Effective Short Track Speed Skating Tracking System

Wang, Yuxuan 01 May 2012 (has links)
This dissertation proposes a novel and effective system for tracking high-speed skaters. A novel registration method is employed to automatically discover key frames to build the panorama. Then, the homography between a frame and the real world rink can be generated accordingly. Aimed at several challenging tracking problems of short track skating, a novel multiple-objects tracking approach is proposed which includes: Gaussian mixture models (GMMs), evolving templates, constrained dynamical model, fuzzy model, multiple templates initialization, and evolution. The outputs of the system include spatialtemporal trajectories, velocity analysis, and 2D reconstruction animations. The tracking accuracy is about 10 cm (2 pixels). Such information is invaluable for sports experts. Experimental results demonstrate the effectiveness and robustness of the proposed system.
493

Sustainable Production of Novel Biomaterials in Escherichia coli

Rahman, Asif 01 May 2014 (has links)
The biotechnology revenues in the United States exceeded $100 billion in 2010 and the potential impact of synthetic biological engineering has been identified nationally as an emerging technology to further expand the national bioeconomy. Synthetic biological engineering approaches biology from an engineering perspective to make biology easier to engineer. The potential to engineer microorganisms for novel applications can have far-reaching implications and benefits for society. Some of the potential applications range from biosensors, biofuels, therapeutics, and biomaterials. In this study two biomaterials were produced in genetically engineered Escherichia coli: polyhydroxybutyrates (PHBs) and spider silk. PHBs are bioplastics that have similar properties to petrochemical-derived plastics. Synthetic biological engineering can be used to optimize PHB extraction from E. coli by secretion of the PHB polymer outside of the cell. Another biomaterial, spider silk, was also produced in E. coli. Spider silk is a unique material with high tensile strength and elasticity and thus could have a wide range of potential applications. Since spider silk is not naturally produced in microorganisms, the DNA sequences were optimized for increased production in E. coli. In addition to optimization of bioproduct production in microorganisms using synthetic biology, another major cost is the carbon substrate. In this study wastewater microalgae were used as an alternative carbon substrate. Coupling synthetic biological engineering and sustainable engineering could potentially make production of bioproducts economically viable in the future.
494

Generalization Characteristics of Form Diversity and Novel Form Production Among Preschool Children

Boswell, Craig B. 01 May 1978 (has links)
The block building, Lego construction, pen drawing, and painting of four preschool children were analyzed in terms of the construction of form diversity and new form production. Social descriptive reinforcement, contingent on the production of any form not previously constructed within the current session and overt modeling of forms never seen produced during the study, increased form diversity scores per session and new form production (forms never seen before in the child's total prior sequence of blockbuilding sessions). The results indicated that after training, form diversity scores generalized to topographically similar and dissimilar media of expression. New form production generalized to topographically similar and dissimilar media in the majority of the children.
495

The Cultural Perspective of Albert Wendt's Novel Pouliuli

Auva'a, Fa'alafua L. 01 May 1997 (has links)
Wendt's accomplishments as an artist of Polynesia and positions he held at different universities are presented in Chapter I. This marks the significant contributions he has made in different genres in which he has written, like novels, short stories, and poetry, that make him a major influence in the Pacific. Chapter II analyzes the theoretical framework within the fa'a-Samoa in which a matai (chief) is presented, a revered office filled by respectable individuals. To make this point clear, I present the theoretical groundwork in Appendix A of how an individual becomes a matai. Chapter III explores how Faleasa Osovae, the protagonist of Pouliuli, mirrors Mersault of The Stranger. This points out Camus's influence on Wendt. Chapter IV investigates similarities of behaviors found among Faleasa Osovae, Mersault, and Bazarov of Turgenev's Father's and Sons. It connects Wendt and Camus to nihilism. This philosophical orientation, however, is toned down when a historical figure, Tupua Tamasese, III (Appendix B), is presented in contrast to remind readers about the historical role of a matai in the fa'a-Samoa. Chapter V explores the cognition theory that looks into behaviors of protagonists. Chapter VI is a discussion of the irony of Faleasa Osovae's behavior. Though I offer some explanation for Faleasa's behavior when I draw parallels between him and Mersault of The Stranger and Bazarov of Father's and Sons, which almost gives him justification for behaving like King Lear, it would be improper in Samoan thought to consider Faleasa a cultural artifact of the fa'a-Samoa.
496

Gold catalyzed novel transformations of Ynamide / Developpement et utilisation de catalyseurs d'or pour la catalyse homogène de derives d'alcenes et d'alcynes

Zhao, Qing 24 October 2016 (has links)
Suite aux premiers travaux réalisés par Ito, Hayashi, Unimoto et Hashmi à la fin du siècle dernier, de nombreux groupes de recherche à travers le monde ont contribué à l’important développement de la catalyse homogène à l’or. Ce dernier, possédant une activité catalytique unique, donne accès à un bon nombre de nouvelles synthèses de composés, jusque-là inaccessible en utilisant d’autres méthodes.Les ynamides, un sous-groupe d’alcynes hétéro-substitués, sont des intermédiaires de synthèse ayant une réactivité et une stabilité modulable. Ils trouvent leur application dans des réactions telles que les additions, les cycloadditions et les cycloisomérisations.Dans ce manuscrit sont présentés deux travaux impliquant des réactions d’ynamides en présence d’un catalyseur à l’or.1) Réarrangement d’éthers de propargyliques d’ynamides catalysé par l’or (I) : Un accès pratique aux allénamides substitués.Les allénamides sont des composés qui présentent de nombreuses applications, d’où l’engouement présent pour accéder à ces composés. Nous avons montré que des allénamides substitués et fonctionnalisés sont facilement accessibles par une réaction de transfert d’hydrure [1,5] suivi d’une fragmentation, le tout catalysé par de l’or et en utilisant des ynamides comme substrats.Notre méthode est rapide et pratique. En effet, la réaction se fait dans des conditions douces (température ambiante) avec une charge catalytique faible (4 mol% de catalyseur à l’or) et donne d’excellents rendements (jusqu’à 99%). En plus d’une bonne compatibilité fonctionnelle sur le carbone terminal (R1 et R2), notre méthode tolère aussi des substituants azotés variés (R’ et R’’). De plus, d’autres transformations in-situ sur les allénamides formés in-situ ont été effectuées. Quelques composés spiros et diènes interessants ont été obtenus avec des rendements excellents.2) Catalyse duale à l’or : Une synthèse originale de dérivés tertahydroquinolines par un mécanisme formel d’addition [4+2]Bien qu’une vaste majorité de la catalyse à l’or contient une activation du système π d’une liaison multiple par un seul complexe d’or, des innovations récentes mettant en jeu deux atomes d’or sur une seule molécule ont été développées par plusieurs groupes, dont le nôtre.Le cycle catalytique est initié par la formation de l’acétylénure d’or et par la coordination d’un autre complexe d’or de la liaison triple de l’ynamide. Après une attaque nucléophile de l’acétylenure d’or sur l’ynamine, un vinylidène d’or est formé. Ce dernier est piégé par la double liaison, donnant naissance au cycle aromatique. / General introductionSince the pioneering work by Ito, Hayashi, Unimoto and Hashmi in late of last century, homogeneous gold catalysis has witnessed tremendous development by contributions from research groups all over the world. Gold catalysts, possessing unique catalytic reactivity, intrigued a large number of novel approaches to target molecules which cannot be accessed by other methodology. Ynamide, which belongs to a subclass of hetero-substituted alkynes, represents a versatile building block with balanced reactivity and stability and found a series of applications in useful transformations, such as additions, cycloadditions and cycloisomerizations.As part of our ongoing interest in gold catalysis and ynamide chemistry, in this manuscript, two works involving ynamide in the presence of gold catalyst was presented:1). Gold(I)-Catalyzed Rearrangement of Propargyl Ethers of ynamides: A Practical Method for the synthesis of Substituted AllenamidesAllenamides are versatile synthetic building blocks that have seen numerous applications and therefore great efforts have been devoted to the access to such compounds. We have shown that a series of substituted and functionalized allenamides were easily accessible via a gold catalysted 1,5-hydride shift/fragmentation sequence using ynamides as the starting material. Our method is rapid and practical. It can be performed under very mild conditions (room temperature) with low catalyst loading (4% gold catalyst) and gave excellent yields (up to 99% yield). Besides the good functionality compatibility in the carbon terminal (R1 and R2), our method also tolerate variuous Nitrogen substituents (R’ and R’’). Moreover, further transformation using in-situ formed allenamides was achieved. Some interesting spiral and diene compounds were also formed in excellent yield.2). Dual gold catalysis: a unique approach to derived-tetrahydroquinolines by a formal [4+2] pathwayAlthough vast majority of gold catalysis features π-activation of a multiple bond by a single gold complex, recent innovative advance involving two gold centers in one single molecule was disclosed recently by several research groups and also by our group.The catalytic cycle was initiated by the formation of gold acetylide and coordination of another gold complex to the triple bond of ynamide. After nucleophilic attack of gold acetylide onto ynamide, gold vinylidene was generated. The formed gold vinylidene was then trapped by double bond, giving rise to aromatic rings.
497

Fire and Gold

Ford, Sarah 30 May 2019 (has links)
No description available.
498

Accidental Clarity

Christianson, Leah Francesca 17 July 2019 (has links)
No description available.
499

"compounded each of both yet either neither": Experimental Dialogics and Literary Ethics of the American Modernist Novel

Merola, Jonathan 18 July 2019 (has links)
No description available.
500

Like Snakes Among Vines

Hosman, Brenna 24 May 2021 (has links)
No description available.

Page generated in 0.0256 seconds