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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.
111

Feeling the Burn: A Dissertation in Practice on Occupational Burnout

Baer, Michael 11 August 2022 (has links)
No description available.
112

Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University

Held, Megan January 2022 (has links)
No description available.
113

TIME, SEQUENCE, COMPOSITION, AND THE SENSORY EXPERIENCE: <i>THE PARALLEL SPIRIT OF MUSIC AND ARCHITECTURE</i>

ARNOLD, ERIN RUTH 11 July 2006 (has links)
No description available.
114

Island of Peace in Dangerous Waters: Taiwan's Occupation of Itu Aba

Fogarty, Conor Joseph 16 September 2022 (has links)
No description available.
115

Pre-harvest sprouting tolerance in hard white winter wheat

Pisipati, Sudha R. January 1900 (has links)
Master of Science / Department of Agronomy / P. V. Vara Prasad / In many countries producers have been growing varieties of hard white winter (HWW) wheat since decades. The cause of concern is most varieties of HWW wheat are susceptible to pre-harvest sprouting (PHS) which affects grain quality. Environmental conditions like high humidity, precipitation, heavy dew and hormonal activity at physiological maturity stimulate PHS in HWW. To alleviate these conditions research was carried out at KSU. KS01HW163-4, a sprouting tolerance line was crossed with Heyne, a sprout susceptible cultivar. A total of 224 doubled haploid (DH) lines thus produced were phenotyped in the present study through experiments conducted in controlled environments. The objectives of this research were to (i) characterize and phenotype the doubled haploid lines for PHS in controlled environments; (ii) understand the impact of growth environment (high temperature and/or drought) and; (iii) impact of exogenous application of growth hormones on tolerance to pre-harvest sprouting in the parental lines of the doubled haploid population. The phenotypic data collected from this research will be ultimately combined with the genotypic data to identify DNA markers related to PHS tolerance and provide DNA markers for marker assisted selection. Based on my results of the germination percentages from the 224 DH lines, the population was distributed as susceptible, and tolerant to PHS showing a bimodal distribution and X[superscript]2 analysis indicating a complimentary gene action. From the study of the influence of environmental factors on PHS, my results confirmed a definite influence of stress on sprouting. Under optimum temperature (OT), KS01HS163-4 was tolerant to PHS, but at HT and/or drought it became susceptible to PHS. Growth under stressed conditions changed the tolerance levels to PHS. Seed dry-weight, and harvest index were also influenced negatively due to stress. Therefore multi-location tests must be conducted with variable environments to test the stability of a variety to PHS. From the study of the influence of phytohormones on PHS, the results suggest that tolerance to sprouting was seen in seeds from plants sprayed with abscisic acid (ABA) and paclobutrazol (GA-inhibitor) treatments where as those from gibberellic acid (GA) treatment showed susceptibility to sprouting.
116

Étude du rôle des thiorédoxines f dans la mort cellulaire programmée et en réponse à divers stress abiotiques chez la plante modèle Arabidopsis thaliana

Villette, Solange January 2015 (has links)
La mort cellulaire programmée, ou MCP, est un processus dynamique où les cellules ont la capacité de déclencher et de contrôler leur propre mort. Elle est essentielle et présente chez tous les organismes multicellulaires. Chez les plantes, la MCP permet le développement optimal (ex : formation du xylème, morphologie des feuilles, etc.) de la plante tout en protégeant contre divers stress biotiques et abiotiques (ex : la sécheresse, la chaleur, les UV, etc.). Malgré les avancées de ces dernières années, peu de gènes impliqués dans la mise en place de la MCP induite par les UV-C ont été identifiés chez les plantes. L'objectif était donc de caractériser ces gènes chez Arabidopsis thaliana. L'un des candidats est le gène BI-1, pour Bax Inhibitor-1. Il code pour un facteur anti-apoptotique de la MCP animale également retrouvé chez Arabidopsis thaliana. BI-1 régule aussi le taux de calcium du réticulum endoplasmique, ainsi que la formation des espèces réactives de l'oxygène (ROS), permettant l'activation de la réponse de la cellule au stress. L'expression de ce gène suite à une exposition aux UV-C est augmentée, faisant de lui un candidat pour la réponse aux UV-C. Une fusion du promoteur du gène AtBI-1 au gène rapporteur de la luciférase (pAtBI-1::luciférase) a été insérée dans le génome d'Arabidopsis. Une plante homozygote pour l'insertion de l'ADN-T, 5PL20E, a été isolée. Cette lignée parentale a été ensuite mutagénéisée, et un crible effectué sur la descendance exposée aux UV-C a permis d'identifier un mutant, 2017, dont l'expression de la luciférase était modifiée. Le premier objectif de ce projet était de caractériser ce mutant et de déterminer le lien potentiel avec la régulation de BI-1. Dans une deuxième partie, nous nous sommes intéressés aux rôles des thiorédoxines (TRX) dans la MCP végétale. Ces protéines sont présentes chez tous les organismes vivants. Elles régulent les activités de beaucoup d'enzymes en réduisant leurs ponts disulfures. Peu représentées chez l'homme (deux gènes), elles ont néanmoins un rôle de protection dans la voie de signalisation de l'apoptose. Par contre, chez Arabidopsis, une vingtaine de gènes codant pour les thiorédoxines sont connus. Suite à un autre crible aux UV-C d'une banque de mutants d'insertion, un nouveau mutant pour lequel l'insertion de l'ADN-T était dans le promoteur du gène codant pour la thiorédoxine f1 (AtTRX f1) a été identifié. Chez Arabidopsis, deux gènes codent pour les TRX f. Ces protéines ont d’abord été étudiées en tant que régulateur d’enzymes du cycle de Calvin. Plus récemment, d’autres fonctions ont été attribuées, surtout à la TRX f1. Nous avons obtenu de simples mutants pour les deux gènes et produit par croisement des doubles mutants, pour étudier l'implication des TRX f dans la MCP végétale induite par les UV-C (ultraviolets de type C), le MV (methyl viologen) et l'ABA (acide abscissique). En parallèle, des surexpresseurs de la TRX f1 ont été analysés pour ces mêmes stress abiotiques. L'objectif était de déterminer s'il y a une redondance de fonction entre les deux gènes, puisque ces deux protéines, de la même sous-famille, sont localisées au niveau des chloroplastes. Suite à une induction de la MCP par l'un des stress abiotiques, les réponses observées chez les simples mutants sont similaires à celles des plantes sauvages. Par contre, les doubles mutants paraissent plus résistants aux divers stress, alors que les surexpresseurs semblent nettement plus sensibles que les plantes sauvages. Enfin, un dernier axe a été développé sur le rôle des TRX f dans le contrôle des voies de synthèse et de dégradation de l'amidon pour l'ensemble des plantes de notre essai. Il s'avère que les surexpresseurs produisent une plus grande quantité d'amidon que les plantes sauvages. À l'opposé, les simples mutants ont moins d'amidon au niveau des différents tissus étudiés que les plantes sauvages, et les doubles mutants n'en présentent quasiment pas. La présence d'une quantité plus importante d'amidon chez les surexpresseurs de TRX f influence la sensibilité de ces plantes aux stress abiotiques. À l'inverse, les doubles mutants sont plus résitants à ces mêmes stress, où cette quantité d'amidon est fortement diminuée pour ces plantes.
117

Régulation des qualités physiologique et sanitaire de la graine de Medicago truncatula. Rôles de MtABI5 et transmission des Xanthomonas aux semences

Terrasson, Emmanuel 18 December 2013 (has links) (PDF)
La maîtrise des qualités physiologique (performance germinative) et sanitaire des semences (vection d'agents pathogènes) constitue un verrou scientifique et technologique majeur dans le cadre d'une agriculture raisonnée et mondialisée. La qualité physiologique repose notamment sur la tolérance à la dessiccation, la dormance et l'aptitude à la conservation qui s'acquièrent pendant le développement de la graine. Cependant les mécanismes régulateurs de ces processus restent mal compris. Chez Medicago truncatula, par une approche transcriptomique nous avons montré que la signalisation par l'acide abscissique participe via le facteur de transcription ABI5 à la régulation de la survie à l'état sec et à la dormance. ABI5 joue un rôle prépondérant dans les phases du développement allant de la fin de la maturation et à la levée. La transmission à et par les semences est l'un des principaux moyens de survie et de dissémination des bactéries phytopathogènes telles que Xanthomonas. Les éléments du dialogue moléculaire qui pourrait s'établir entre ces bactéries et la graine sont cependant méconnus. Après avoir établi que la contamination est plus efficace en situation compatible [Xanthomonas alfalfae subsp. alfalfae] qu'en situation incompatible [X. campestris pv. campestris, Xcc], nous démontrons l'existence d'un dialogue moléculaire entre Xcc et la graine en développement. La réponse transcriptionelle de la graine contaminée par Xcc et la réduction de leur poids suggèrent un trade-off entre l'activation des défenses basales et son développement. Cette thèse apporte des éléments permettant de suggérer que les qualités sanitaire et physiologique sont liées.
118

Conquistas e desafios da Análise do Comportamento Aplicada no trabalho para pessoas com Transtorno do Espectro Autista: questões de eficácia e de formação de profissionais / Achievements and challenges of Applied Behavior Analysis at work for people with Autistic Spectrum Disorder: efficacy issues and training professionals

Hora, Cássia Leal da 18 November 2015 (has links)
Made available in DSpace on 2016-04-29T13:17:56Z (GMT). No. of bitstreams: 1 Cassia Leal da Hora.pdf: 1433192 bytes, checksum: eaa1159b3d744fdef0688a3354bd0fa3 (MD5) Previous issue date: 2015-11-18 / Applied Behavior Analysis (ABA) interventions have been recommended for individuals with ASD since the 1980s as the main treatment for deficits arising from the disorder. There was a growing demand for professionals who can work with ABA interventions. At the same time, there have been several proposals for alternative treatments without sufficient evidences to their recommendation. Was established a controversial atmosphere about the effectiveness of ABA interventions and questions about the quality of the professionals who delivered such services. This thesis aims, in Study 1, critically evaluate and identify the criteria used by systematic reviews and meta-analysis research for generating conclusions about the effectiveness of ABA intervention for individuals with ASD. In Study 2, the goal was identifying behaviour analytic recommendations about minimum skills and competencies to delivery of high quality services by Supervisor/Planner and Applicator of ABA interventions. Results showed, from different criteria used by the meta-analysis research, most of the conclusions were moderate/medium or strong/large effect sizes of ABA interventions. The results of study1 showed that Baer, Wolf and Risley (1968) s criteria aren t considered by the meta-analysis for ABA interventions evidences evaluating, they are still proving effective and being considered as an evidence-based practice for the individuals with TEA treatment. Study 2 showed that there is little similarity between documents of recommendations about both professional s competencies who work at ABA intervention for ASD. This results indicating that Supervisor/Planner and Applicator s repertoire should be different. Based documents analysis and synthesis, this study presented a new proposal on possible skills, competencies, functions and expertise that the Supervisor/Planner and the Applicator of such intervention should have. In the face of several challenges to increase knowledge and effectiveness about ABA interventions and their professional s efficiency, future research should be realized to increase access and recognition of this kind of information to scientific community from other biomedical sciences and consumers of ABA s delivery services for individuals with ASD / Intervenções com base em Análise do Comportamento Aplicada (ABA) têm sido indicadas para indivíduos com TEA desde a década de 1980 como o principal tratamento para os déficits decorrentes do transtorno. Houve o crescimento da demanda por profissionais que trabalhassem com intervenções ABA. Em paralelo, surgiram muitas propostas de tratamentos alternativos sem evidências suficientemente comprovadas para sua recomendação. Estabeleceu-se um clima de controvérsia sobre a eficácia das intervenções baseadas em ABA e questionamentos sobre a qualidade dos profissionais que prestavam esse tipo de serviço. O presente trabalho tem como objetivos, no Estudo 1, identificar e avaliar criticamente os critérios utilizados por revisões sistemáticas com metanálise para gerar conclusões a cerca da eficácia de intervenções ABA para indivíduos com TEA. No Estudo 2, o objetivo foi identificar as recomendações analítico-comportamentais sobre as habilidades e competências mínimas para a prestação de serviços de qualidade pelo Supervisor/Planejador e pelo Aplicador de intervenções ABA. Os resultados mostraram que, a partir de diferentes critérios adotados pelas metanálises, a maioria das conclusões foi de que a magnitude dos efeito das intervenções baseadas em ABA eram moderada/média ou forte/grande. Os resultados do Estudo1 indicam que, apesar dos critérios de Baer, Wolf e Risley (1968) não serem considerados pelas metanálises para a avaliação das evidências, intervenções ABA continuam se mostrando eficazes e sendo consideradas como uma prática baseada em evidências para o tratamento de indivíduos com TEA. O Estudo 2 mostrou que existe pouca similaridade entre os documentos de recomendações sobre as competências dos dois tipos de profissionais que trabalham em intervenções ABA para TEA indicando que o repertório de ambos deve ser diferente. A partir da análise e síntese dos documentos, o presente estudo apresentou uma nova proposta sobre possíveis habilidades, competências, funções e conhecimentos que o Supervisor/Planejador e o Aplicador desse tipo de intervenção devem possuir. Diante de diversos desafios para ampliar os conhecimentos sobre a eficácia da intervenção e eficiência dos seus profissionais, futuros estudos devem ser realizados para ampliar o acesso e o reconhecimento desse tipo de informação para a comunidade científica de outras ciências biomédicas e para os consumidores da prestação de serviço em ABA para indivíduos com TEA
119

Identification of Arabidopsis genes involved in differential interaction phenotype establishment by distinct Verticillium spp. and isolates

Stepanets, Dimitri 09 April 2018 (has links)
No description available.
120

A Concurrency and Time Centered Framework for Certification of Autonomous Space Systems

Dechev, Damian 2009 December 1900 (has links)
Future space missions, such as Mars Science Laboratory, suggest the engineering of some of the most complex man-rated autonomous software systems. The present process-oriented certification methodologies are becoming prohibitively expensive and do not reach the level of detail of providing guidelines for the development and validation of concurrent software. Time and concurrency are the most critical notions in an autonomous space system. In this work we present the design and implementation of the first concurrency and time centered framework for product-oriented software certification of autonomous space systems. To achieve fast and reliable concurrent interactions, we define and apply the notion of Semantically Enhanced Containers (SEC). SECs are data structures that are designed to provide the flexibility and usability of the popular ISO C++ STL containers, while at the same time they are hand-crafted to guarantee domain-specific policies, such as conformance to a given concurrency model. The application of nonblocking programming techniques is critical to the implementation of our SEC containers. Lock-free algorithms help avoid the hazards of deadlock, livelock, and priority inversion, and at the same time deliver fast and scalable performance. Practical lock-free algorithms are notoriously difficult to design and implement and pose a number of hard problems such as ABA avoidance, high complexity, portability, and meeting the linearizability correctness requirements. This dissertation presents the design of the first lock-free dynamically resizable array. Our approach o ers a set of practical, portable, lock-free, and linearizable STL vector operations and a fast and space effcient implementation when compared to the alternative lock- and STM-based techniques. Currently, the literature does not offer an explicit analysis of the ABA problem, its relation to the most commonly applied nonblocking programming techniques, and the possibilities for its detection and avoidance. Eliminating the hazards of ABA is left to the ingenuity of the software designer. We present a generic and practical solution to the fundamental ABA problem for lock-free descriptor-based designs. To enable our SEC container with the property of validating domain-specific invariants, we present Basic Query, our expression template-based library for statically extracting semantic information from C++ source code. The use of static analysis allows for a far more efficient implementation of our nonblocking containers than would have been otherwise possible when relying on the traditional run-time based techniques. Shared data in a real-time cyber-physical system can often be polymorphic (as is the case with a number of components part of the Mission Data System's Data Management Services). The use of dynamic cast is important in the design of autonomous real-time systems since the operation allows for a direct representation of the management and behavior of polymorphic data. To allow for the application of dynamic cast in mission critical code, we validate and improve a methodology for constant-time dynamic cast that shifts the complexity of the operation to the compiler's static checker. In a case study that demonstrates the applicability of the programming and validation techniques of our certification framework, we show the process of verification and semantic parallelization of the Mission Data System's (MDS) Goal Networks. MDS provides an experimental platform for testing and development of autonomous real-time flight applications.

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