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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.
11

Innovation et coordination dans les standards NTIC : le rôle des brevets essentiels / Innovation and Coordination for ICT Standards : the Role of Essential Patents

Baron, Justus 24 September 2012 (has links)
Cette thèse étudie le rôle des brevets essentiels pour la coordination de l'innovation dans les standards des Nouvelles Technologies d'Information et de Communication (NTIC). Les firmes actives dans la standardisation ont réagi au défi de la marée de brevets essentiels en créant des mécanismes innovateurs de coordination, et notamment des consortia informels de standardisation et des pools de brevets. La thèse met en lumière le mécanisme d'appropriation original que représentent les brevets essentiels. Ce mécanisme peut cependant générer des incitations à recourir à des stratégies opportunistes. Les pools de brevets peuvent exacerber ces incitations, mais induisent également une augmentation du nombre de brevets déposés autour des standards technologiques. Les consortia informels ont un effet positif sur le nombre de brevets liés aux standards si les incitations à innover sont insuffisantes. L'effet des consortia est plus faible, voire négatif, si les incitations à innover sont excessives. Les brevets essentiels influencent le progrès technologique des standards, notamment en donnant lieu à un progrès plus continu, consistant dans de nombreuses mises à jour et évitant les remplacements de standards. / This thesis studies the role of essential patents for the coordination of innovation in ICT standards. The increasing number of essential patents around technological standards is an increasing challenge for standardizing firms. In response, these firms have developed innovative coordination mechanisms, and in particular patent pools and informal standards consortia. This thesis sheds light on the function of essential patents as a distinctive appropriation mechanism tailored to cumulative innovation. This mechanism can however induce incentives for opportunistic strategies, which can be even exacerbated by patent pools. Nevertheless, patent pools also lead to an increase in the number of patented technologies developed for technological standards. Informal consortia induce an increase in the number of standard-related patents when incentives to innovate are insufficient. When the incentives to innovate are excessive, the effect of consortia on the number of patents is weaker, or even negative. Essential patents have an incidence on the technological progress of standards. For instance, inclusion of essential patents induces a more continuous type of technological progress, consisting in many small standard updates, and avoiding discontinuous standard replacements.
12

Heritable Microbial Endosymbionts in Insects: Insights from the Study of a Parasitic Wasp and its Cockroach Host

Gibson, Cara January 2008 (has links)
Endosymbiosis is a pervasive phenomenon that has been a powerful force in insect evolution. In many well studied insect-bacterial associations, the bacteria can serve as reproductive manipulators, nutritional mutualists or defenders of their hosts. Fungi are also frequently associated with insects, and initial estimates suggest that these fungi are hyperdiverse. Saving a handful of examples, however, the functions of these fungi within insect hosts are largely unknown. This dissertation begins with a review that lays the conceptual groundwork for understanding bacterial and fungal endosymbiosis in insects. I make predictions about why one versus the other microbe might serve the insect, given any unique physiological, ecological or evolutionary conditions. I then aim to derive insights about microbial symbiosis by focusing on a particular system, that of brownbanded cockroaches, Supella longipalpa (Blattaria: Blattellidae) and their specialist wasp parasitoids, Comperia merceti (Hymenoptera: Encyrtidae). Here, I identify the symbiotic community of these two insects by using both culture-dependent and independent methods to characterize the vertically transmitted bacterial and fungal associates. Finally, I show that a heritable fungus in C. merceti, long presumed to be a mutualist, is parasitic under laboratory conditions: infected wasps incur fitness costs for housing the fungal symbiont relative to uninfected wasps. Additionally, although the fungus is not horizontally transmitted sexually, it is readily horizontally transmitted from the offspring of infected females to those of uninfected females that are using the same host.
13

Consórcio intermunicipal para manutenção da sinalização urbana / Intercity consortia for the maintenance of traffic signs and road markings

Silva, Joicy Poloni 13 August 2014 (has links)
Este trabalho visa propor um sistema consorciado para a manutenção da sinalização urbana em municípios de pequeno porte. A viabilidade do uso do consórcio foi verificada através da análise comparativa de custos e da carga operacional de uma central de atendimento para todas as cidades e da instalação de um centro de serviços em cada cidade. Um sistema de informações geográficas (TransCAD) foi usado para simular dois cenários: o serviço de manutenção a partir de uma central que atende todas as cidades versus um centro de atendimento em cada cidade. A viabilidade do uso do consórcio intermunicipal proposto é demonstrada através de um estudo de caso compreendendo 18 cidades na região central do estado de São Paulo. Os resultados finais mostram que os objetivos iniciais propostos foram alcançados. / The objective of this research was to propose the use, by small towns, of intercity consortia for the maintenance of traffic signs and road markings at urban intersections. The comparison was made in terms of total costs and operational load for a central service center, as opposed to the costs and operational loads of service centers located in each town. A geographical information system (TransCAD) was used to simulate two scenarios: maintenance services from a central location, serving all participating towns versus the use of a service center in each town. The feasibility of the proposed approach was demonstrated by a case study for 18 towns in the central region of the state of São Paulo. The final results prove that the initial objectives were achieved.
14

Consórcio intermunicipal para manutenção da sinalização urbana / Intercity consortia for the maintenance of traffic signs and road markings

Joicy Poloni Silva 13 August 2014 (has links)
Este trabalho visa propor um sistema consorciado para a manutenção da sinalização urbana em municípios de pequeno porte. A viabilidade do uso do consórcio foi verificada através da análise comparativa de custos e da carga operacional de uma central de atendimento para todas as cidades e da instalação de um centro de serviços em cada cidade. Um sistema de informações geográficas (TransCAD) foi usado para simular dois cenários: o serviço de manutenção a partir de uma central que atende todas as cidades versus um centro de atendimento em cada cidade. A viabilidade do uso do consórcio intermunicipal proposto é demonstrada através de um estudo de caso compreendendo 18 cidades na região central do estado de São Paulo. Os resultados finais mostram que os objetivos iniciais propostos foram alcançados. / The objective of this research was to propose the use, by small towns, of intercity consortia for the maintenance of traffic signs and road markings at urban intersections. The comparison was made in terms of total costs and operational load for a central service center, as opposed to the costs and operational loads of service centers located in each town. A geographical information system (TransCAD) was used to simulate two scenarios: maintenance services from a central location, serving all participating towns versus the use of a service center in each town. The feasibility of the proposed approach was demonstrated by a case study for 18 towns in the central region of the state of São Paulo. The final results prove that the initial objectives were achieved.
15

Innovation et coordination dans les standards NTIC : le rôle des brevets essentiels

Baron, Justus 24 September 2012 (has links) (PDF)
Cette thèse étudie le rôle des brevets essentiels pour la coordination de l'innovation dans les standards des Nouvelles Technologies d'Information et de Communication (NTIC). Les firmes actives dans la standardisation ont réagi au défi de la marée de brevets essentiels en créant des mécanismes innovateurs de coordination, et notamment des consortia informels de standardisation et des pools de brevets. La thèse met en lumière le mécanisme d'appropriation original que représentent les brevets essentiels. Ce mécanisme peut cependant générer des incitations à recourir à des stratégies opportunistes. Les pools de brevets peuvent exacerber ces incitations, mais induisent également une augmentation du nombre de brevets déposés autour des standards technologiques. Les consortia informels ont un effet positif sur le nombre de brevets liés aux standards si les incitations à innover sont insuffisantes. L'effet des consortia est plus faible, voire négatif, si les incitations à innover sont excessives. Les brevets essentiels influencent le progrès technologique des standards, notamment en donnant lieu à un progrès plus continu, consistant dans de nombreuses mises à jour et évitant les remplacements de standards.
16

Angebots-, Nutzungs- und Bezugsstrukturen elektronischer Fachinformation in Deutschland

Degkwitz, Andreas, Andermann, Heike January 2003 (has links)
Mit dem Übergang zum digitalen Medium haben sich die Bezugsstrukturen und das Angebot an elektronischer Fachinformation in den Bibliotheken nachhaltig verändert. In den vorliegenden Untersuchungen wird das Angebot elektronischer Zeitschriften und Datenbanken und die Nutzung elektronischer Zeitschriften in fünf ausgewählten Fachgebieten und in unterschiedlichen Bibliothekstypen dargelegt. Darüber hinaus werden die derzeitigen Bezugsstrukturen beschrieben sowie die Ergebnisse einer Befragung der Konsortien zu Zielsetzungen, Vertragsformen und Geschäftsmodellen dargestellt. Chancen und Risiken der konsortialen Bezugsform werden erörtert. / With the transition to the digital medium the structures for purchasing digital information and the offer of scientific information in the libraries changed strongly. In the available examination the offer of electronic journals and databases and the usage of electronic journals in five selected disciplines and in different types of libraries is evaluated. Further more the current purchasing structures and the results of interviews with consortia in regard to objectives, forms of contracts and pricing models are described. Chances and risks of consortia purchasing are discussed.
17

Curricular joint venture : a model for meeting community and educational demands

Peck, Susan J. Bradshaw, Lynn. January 2009 (has links)
Thesis (Ed.D.)--East Carolina University, 2009. / Presented to the faculty of the Department of Educational Leadership. Advisor: Lynn Bradshaw. Title from PDF t.p. (viewed May 20, 2010). Includes bibliographical references.
18

Assessment and Optimization of Ex-Situ Bioremediation of Petroleum Contaminated Soil under Cold Temperature Conditions

Gomez, Francisco 04 February 2014 (has links)
Current prices and demand for petroleum hydrocabons have generated an increase of oil spills around the country and the world. Health and environmental impacts associated to these organic pollutants represent a huge concern for the general public, leading the public and private sector to develop new technologies and methods to minimize or eliminate those risks. Ex-Situ bioremediation through biopiles, as a main remediation technique to treat a wide range of hydrocarbons, has been a topic of considerable research interest over the last years. It provides an economical and environmental solution to restore the environment to background levels. Nevertheless, successful bioremediation under cold climate conditions is of considerable concern in countries like Canada, as low temperatures can delay the rate of bioremediation of oil hydrocarbons, thus limiting the operation of soil treatment facilities to certain times of the year. Recent research has found out that bioremediation could be conducted even at low or cold temperatures with larger periods of times. And even more, the addition of petroleum degrading microorganisms (bioaugmentation) and nutrients or biosurfactants (biostimulation) could enhance the process in some cases. In the present study, a comprehensive assessment of bioaugmentation and biostimulation strategies for ex-situ bioremediation of petroleum contaminated soil under cold climate conditions is proposed. Field scale biopiles were constructed and subjected to different concentrations of commercial microbial consortia and mature compost, as bioaugmentation and biostimulation strategies, in a soil treatment facility at Moose Creek, Ontario over a period of 94 days (November 2012 to February 2013). Assessment and comparison of the biodegradation rates of total petroleum hydrocarbons (TPH) and their fractions were investigated. Furthermore, a response surface methodology (RSM) based on a factorial design to investigate and optimize the effects of the microbial consortia application rate and amount of compost on the TPH removal was also assessed. Results showed that biopiles inoculated with microbial consortia and amended with 10:1 soil to compost ratio under aerobic conditions performed the best, degrading 82% of total petroleum hydrocarbons (TPHs) with a first-order kinetic degradation rate of 0.016 d_1, under cold temperature conditions. The average removal efficiencies for TPHs after 94 days for control biopiles, with no amendments or with microbial consortia or compost only treatments were 48%, 55%, and 52%, respectively. Statistical analyses indicated a significant difference (p < 0.05) within and between the final measurements for TPHs and a significant difference between the treatment with combined effect, and the control biopiles. On the other hand, the modeling and optimization statistical analysis of the results showed that the microbial consortia application rate, compost amendment and their interactions have a significant effect on TPHs removal with a coefficient of determination (R2) of 0.88, indicating a high correlation between the observed and the predicted values for the model obtained. The optimum concentrations predicted via RSM were 4.1 ml m-3 for microbial consortia application rate, and 7% for compost amendment to obtain a maximum TPH removal of 90.7%. This research contributes to provide valuable knowledge to practitioners about cost-effective and existing strategies for ex-situ bioremediation under cold weather conditions.
19

Desafios do saneamento ambiental: a solução cooperativa dos consórcios intermunicipais / Desafios do saneamento ambiental: a solução cooperativa dos consórcios intermunicipais / Challenges of environmental sanitation: a cooperative solution of inter / Challenges of environmental sanitation: a cooperative solution of inter

Anakelle da Silva Guimarães 18 August 2010 (has links)
Conselho Nacional de Desenvolvimento Científico e Tecnológico / O presente estudo versa sobre os desafios enfrentados pelo gestor público na universalização dos serviços de saneamento básico fruto, principalmente, de uma interpretação dissociada dos dispositivos constitucionais, que conferiria a competência para o desenvolvimento urbano exclusivamente ao município. Para tal, inicialmente, realiza-se uma breve cronologia das políticas públicas em esgotamento sanitário e abastecimento de água passando pela análise dos atuais investimentos realizados pelos Programas de Aceleração do Crescimento e Saneamento para todos, estimulados pela edição da Política Nacional de Saneamento (Lei n&#730; 11.445/2007). Em sequência, abordam-se as competências constitucionais em saneamento básico, marcadas pelo critério da predominância de interesses, bem como o posicionamento da jurisprudência e doutrina nacionais acerca da titularidade destes serviços. A terceira parte do estudo, analisa a estreita relação do abastecimento de água e esgotamento sanitário com a concretização de direitos fundamentais, a abrangência da terminologia saneamento básico, os limites e possibilidades de atuação do gestor municipal assim como a conjuntura atual de acesso a estes serviços, passando pela abordagem do caráter econômico do saneamento básico. Por fim, realiza-se o estudo de caso da celebração de consórcios intermunicipais em saneamento ambiental nos anos 90 na Microrregião dos Lagos (Lei do Estado do Rio de Janeiro n&#730; 133/2009), mesmo antes da existência do marco regulatório da atuação por meio de consórcios públicos, que só chegou ao ordenamento jurídico nacional por meio da Lei 11.107/2005, demonstrando como a adoção de uma postura cooperativa entre os entes da Federação, a despeito de conflitos pela titularidade, é capaz de reduzir significativamente os custos de instalação e ampliar o acesso a estes serviços. / This study focuses on the challenges faced by public officials in the universalization of basic sanitation services, resulting primarily from a dissociated interpretation of constitutional provisions, which would confer the task of urban development exclusively to the City. To this end, there will be a brief chronology of public policies in sanitation and water supply through the analysis of current investments by some programs, stimulated by the edition of the National Sanitation Policy Law n &#730; 11.445/2007. After this, the constitutional responsibilities in sanitation are discussed, marked by the predominance of interest criterion as well as the positioning of national jurisprudence and doctrine concerning the ownership of these services. The third part of the study examines the close relationship between water supply and sanitation to the realization of fundamental rights, the terminology of sanitation coverage, limits and possibilities of performance of municipal managers as well as the current situation of access to these services going through an economic approach to sanitation. Finally, there will be a case study about municipal consortia in environmental sanitation in the 90s in some Cities (Law of the State of Rio de Janeiro n &#730; 133 / 2009), even before the existence of a regulatory framework for the performance through consortia, which only reached the national legal system through Law 11.107/2005, showing how adopting a cooperative attitude among members of the Federation, despite conflicts over ownership, is capable of reducing installation costs and expanding access to these services.
20

Produtividade e métodos de sobressemeadura de aveia preta em pastagem irrigada de Tifton-85 sob pastejo de ovinos no cerrado / Productivity and methods of black oat size in irrigated paste of Tifton-85 under closed sheep pastejo

Lino, Diego Marostica 01 March 2018 (has links)
Submitted by DIEGO MAROSTICA LINO (dmarostical@hotmail.com) on 2018-04-26T23:31:24Z No. of bitstreams: 1 PPG_CTA_Diego_Marostica_Lino.pdf: 884534 bytes, checksum: 0a3f22e71b5fa827238ccc5a62455faa (MD5) / Approved for entry into archive by Cristina Alexandra de Godoy null (cristina@adm.feis.unesp.br) on 2018-04-27T12:33:45Z (GMT) No. of bitstreams: 1 lino_dm_me_ilha.pdf: 884534 bytes, checksum: 0a3f22e71b5fa827238ccc5a62455faa (MD5) / Made available in DSpace on 2018-04-27T12:33:45Z (GMT). No. of bitstreams: 1 lino_dm_me_ilha.pdf: 884534 bytes, checksum: 0a3f22e71b5fa827238ccc5a62455faa (MD5) Previous issue date: 2018-03-01 / Na busca por minimizar a sazonalidade da produção de forragens e manter a qualidade nutricional, o uso da consorciação de culturas de inverno é uma alternativa que promove a disponibilidade de forragem de alta qualidade no período em que há pouco crescimento das pastagens tropicais, visando suprir a baixa oferta alimentar de qualidade ocasionada no período de outono e inverno com baixo custo de implantação. Portanto, objetivou-se, com o presente estudo, avaliar métodos de sobressemeadura da aveia preta em pastagem irrigada de Tifton-85 em cerrado de baixa altitude, sob pastejo de ovinos durante dois anos, analisando os índices de produtividade, custos de produção e composição bromatológica da consorciação forrageira da pastagem. Os tratamentos experimentais utilizados foram: controle (pastagem de Tifton-85), sobressemeaduras realizada na pastagem de Tifton-85 da aveia antes do pastejo dos ovinos; aveia durante o pastejo dos ovinos; aveia com compactação com trator; aveia com gradagem superficial; e aveia com gradagem superficial e compactação com trator. O delineamento experimental foi conduzido em blocos completos casualizados com seis tratamentos (métodos de sobressemeadura e o controle) e quatro repetições (24 unidades experimentais). Recomenda-se de acordo com os resultados obtidos, o método de sobressemeadura de aveia preta no capim Tifton-85 antes do pastejo, por apresentar participação efetiva na composição botânica do pasto, aumentando a disponibilidade de forragem, com qualidade nutricional e baixo custo de implantação. / In order to minimize the seasonality of forage production and maintain nutritional quality, the use of intercropping in winter crops is an alternative that promotes the availability of high quality fodder in the period when there is little growth of tropical pastures, aiming to supply the low quality food supply in the autumn and winter with low implementation costs. Therefore, the objective of this study was to evaluate the methods of overgrazing of black oats in Tifton-85 irrigated pasture in low-lying cerrado, under grazing of sheep for two years, analyzing productivity, production costs and composition of grassland forage consortium. The experimental treatments used were: control (Tifton-85 pasture), rearing performed on the Tifton-85 pasture of oats before grazing of sheep; oats during grazing of sheep; oats with compaction with tractor; oats with surface sorting; and oats with surface sorting and tractor compaction. The experimental design was conducted in randomized complete blocks with six treatments (overpressure and control methods) and four replicates (24 experimental units). According to the results obtained, the method of overwintering of black oats in the Tifton-85 grass before grazing is recommended, since it presents an effective participation in the botanical composition of the pasture, increasing the availability of forage, with nutritional quality and low implantation cost.

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