Дисертації з теми "MgtB"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "MgtB".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Belon, Claudine. "Rôle du facteur de virulence MGTC chez les mycobactéries et Pseudomonas aeruginosa et son inhibition par un peptide naturel." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS072/document.
Повний текст джерелаAntibiotic resistance is a major problem in public health, which leads to develop new therapeutics strategies, including strategies targeting bacterial virulence factors. MgtC is a virulence factor involved in intramacrophage survival in several intracellular pathogens. MgtC protein is also present in extracellular pathogen Pseudomonas aeruginosa. Moreover, a peptide MgtR has been identified as a potential and natural antagonist of MgtC.To study the role of MgtC in mycobacterial virulence, I have analysed a Mycobacterium marinum mgtC mutant in zebrafish embryo and macrophage infection models. This approach allowed us to uncover a new role of MgtC in phagocytosis, which is increased with mgtC mutant. In P. aeruginosa, we have shown that a mgtC mutant is attenuated in zebrafish embryos. In ex vivo experiments, mgtC mutant is more sensitive to macrophage killing. In parallel, I have shown that M. marinum and P. aeruginosa mgtC genes are regulated by magnesium. In addition, expression of P. aeruginosa mgtC is highly induced in macrophages.Finally, regarding MgtR antagonistic properties, Mycobacterium bovis BCG or P. aeruginosa strains expressing mgtR appear to mimic the behaviour of mgtC mutants, suggesting promising anti-virulence properties for MgtR and supporting the choice of MgtC as a suitable target of an anti-virulence strategy
Stone, Christopher E., Keith D. Flint, and Gregory P. Mathis. "THE PHILLIPS LABORATORY’S MOBILE GROUND TRACKING STATION (MGTS)." International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/608411.
Повний текст джерелаPhillips Laboratory's Space Experiments Directorate (PL/SX) is operating and upgrading the laboratory's premier transportable satellite tracking station, the Mobile Ground Tracking Station (MGTS) program. MGTS supports orbital, suborbital, and aircraft missions as a range system capable of processing and recording multiple data streams. MGTS receives, processes, displays, and records satellite state-of-health data, infrared images in a variety of wavelengths, video data, and state vector solutions based on IR returns from the Miniature Sensor Technology Integration (MSTI) satellite program. The program has began in 1990 under BMDO sponsorship, with the intent to supplement existing test ranges with more flexibility in range operations. Wyle Laboratories and Systems Engineering and Management Company (SEMCO) provided the technical expertise necessary to create the first MGTS system. Autonomy and off-road capability were critical design factors, since some of the operations envisioned require deployment to remote or hostile field locations. Since inception, MGTS has supported the Lightweight Exo-Atmospheric Projectile (LEAP) sub-orbital missions, the MSTI satellite program, and Air Force wargame demonstrations. In pursuit of these missions, MGTS has deployed to White Sands Missile Range (WSMR), NM; Air Force Flight Test Center (AFFTC), Edwards AFB, CA; Vandenberg AFB, CA; Falcon AFB, CO; and NASA's Wallops Island Flight Facility, VA, to receive critical mission telemetry data conforming to both IRIG and SGLS standards. This paper will describe the evolution of the MGTS program, current hardware configurations and past and future mission scenarios for the MGTS team.
Zhou, Sihai. "Processing and characterisation of MgB₂ superconductors." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20041111.135706/index.html.
Повний текст джерелаLing, Jiayin. "Monofilament MgB₂ wires for MRI magnets." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78185.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 85-86).
MRI magnets are useful medical devices in early detection and efficient treatment of disease or injury. Because of the significant better performance, MRI magnets are made of superconductors rather than made of copper. Nowadays, there are over 20,000 superconducting MRI magnets installed worldwide. Most of them are made of NbTi or Nb₃Sn, but they are usually very expensive to purchase or operate. So, my colleagues chose MgB₂ wires to develop low-cost and easy-to-operate MRI units which serve to the majority of the humanity. Because we have a reliable technology to fabricate superconducting joints with monofilament MgB₂ wire, we decided to build our MgB₂ MRI magnet with monofilament wire instead of multifilament wire. Previously, flux jumping was found to be the main issue with monofilament superconducting wire; we have to demonstrate that flux jumping is not a big issue with monofilament MgB₂ wire before we can build our MRI magnet with it. In this thesis, a series of experiments was designed and carried out to prove that the monofilament MgB₂ wire performs as well as the multifilament MgB₂ wire in MRI magnet applications. Short samples of monofilament MgB₂ wires were tested, and magnetization trace of the short samples showed that flux jumping could be a minor issue with monofilament MgB₂ wire. Three 100-m sample coils made of multifilament MgB₂ wire, monofilament MgB₂ wire, and monofilament NbTi wire were wound, tested and compared. The results of these tests demonstrated that the monofilament MgB₂ wire has insignificant flux jumping which does not lead to a premature quench. So, monofilament MgB₂ wire is potentially a good option for MRI magnets.
by Jiayin Ling.
S.M.
Flint, Keith D., Gregory P. Mathis, and Tom G. Cronauer. "The Phillips Laboratory's Mobile Ground Telemetry Station (MGTS) Configuration and Operations." International Foundation for Telemetering, 1993. http://hdl.handle.net/10150/611830.
Повний текст джерелаIn support of the various programs that the Phillips Laboratory's Space Experiments Directorate is conducting for the Ballistic Missile Defense Organization (BMDO), the Range Operations Division is developing a mobile telemetry processing system as part of the Mobile Ground Telemetry Station (MGTS) program. The MGTS program's goals are to develop a mission-dedicated telemetry system to supplement current test range capabilities by receiving, processing and recording multiple data streams, sometimes exceeding 10 Mbps. The system will support airborne and suborbital vehicles as well as customized satellite downlinks designed for spacecraft bus State-of-Health monitoring and sensor payload observations. Autonomy and off-road capabilities are also important factors since some of the operations envisioned require deployment to remote field locations where no telemetry processing capabilities currently exist to support the unique data handling requirements. The Phillips Laboratory has completed, with support from Wyle Laboratories and Systems Engineering and Management Company (SEMCO), a "proof-of-concept" mobile telemetry processing system referred to as MGTS #2. Demonstration of the system has been accomplished with the successful deployment and operational support provided to both BMDO's Lightweight Exo-Atmospheric Projectile (LEAP) sub-orbital missions and Miniature Sensor Technology Integration (MSTI) satellite program. MGTS #2 has deployed and is scheduled for further deployment to various operating sites including: White Sands Missile Range (WSMR), NM; Air Force Flight Test Center (AFFTC), Edwards AFB, CA; Vandenberg AFB, CA; and NASA's Wallops Island Flight Facility, VA. While deployed MGTS #2 processes, records and rapidly distributes the critical mission telemetry data conforming to both IRIG and SGLS standards. This paper will describe the evolution of the MGTS program, current hardware configurations and the various mission scenarios that have been supported by the MGTS team.
Avronsart, Julien. "Conception d’un aimant supraconducteur MgB₂ à hauts champs." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS292/document.
Повний текст джерелаHelium shortage is an issue for superconducting magnets and drives superconducting magnet designer to find other types of effective superconductors that could be used in conduction-cooled magnets.MgB₂ is a promising superconducting material and could fill the demand. MgB₂ was discovered in2001, its critical temperature (39 K) as well as its mass production of a variety of shapes (ribbons, films, cables, wires…) over long length makes MgB₂ a competitive substitute to historical low temperature superconductors such as NbTi and Nb₃Sn in magnets. Although promising, MgB₂ conductors still need mechanical improvement compared to NbTi's and their performance in practical applications has yet to be demonstrated especially for low bending radius magnets. This thesis aims to design and builda MgB₂ conduction-cooled prototype generating a 2 T on the axis on its own in a 3 T background field. Three lengths of conductors were fused by two resistive junctions at the very heart of the winding challenging the design and the fabrication because of the thermal issues. The thesis focuses on three main topics. First, superconducting and mechanical performances of several MgB₂ conductors candidates for the prototype are analyzed and discussed. The design calculation (magnetic, mechanical,thermalization of the prototype and protection) and all the fabrication process (winding, instrumentation, thermal apparatus and impregnation) are presented. In order to validate the fabrication steps and the performances of the prototype, the protoype is tested and the results discussed in the last chapter
Tellaroli, Taís Marina. "TV DIGITAL INTERATIVA NO BRASIL: ESTUDO DOS APLICATIVOS INTERATIVOS STICKERCENTER E DO TELEJORNAL MGTV." Universidade Metodista de São Paulo, 2013. http://tede.metodista.br/jspui/handle/tede/648.
Повний текст джерелаCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
Com o avanço da tecnologia e chegada da TV digital no Brasil, estudos apontam que a televisão aberta começa um novo estágio desde seu surgimento. Esta mídia disponibiliza ferramentas que permitem aos emissores de conteúdo uma dimensão interativa ainda não experimentada, sobretudo nos processos de comunicação massivos indicando que é possível novos caminhos de investimento na produção de conteúdo por parte das emissoras de TV. Com esta realidade de fundo, experiências começam a ser testadas no âmbito da televisão, como o StickerCenter, um software - desenvolvido pela TOTVS - que reúne elementos da internet na TV possibilitando ao receptor maior interação com o conteúdo televisivo, outra experiência é a realizada pela Rede Integração, afiliada à Rede Globo em Minas Gerais, com o software desenvolvido pela HXD Interactive Television, que testa um modelo brasileiro de interatividade no telejornal. Este trabalho mostra como estas duas empresas estão desenvolvendo aplicativos interativos para a TV utilizando o Middleware Ginga e os motivos pelos quais sua popularização não aconteceu. O StickerCenter não se popularizou e indica que o motivo seja erro de estratégia da empresa em desenvolver um produto que une broadband e broadcast TV sem atrativos ao consumidor, já o aplicativo interativo da Rede Integração não foi colocado no ar e apresenta inúmeros fatores que demonstram que não explorará a interatividade pela ausência de canal de retorno. Este estudo investigou o impacto da interatividade no mercado da radiodifusão e como a convergência tecnológica aponta para a construção de uma nova mídia baseada em displays interativos capazes de oferecer aos consumidores uma nova forma de recepção de conteúdo.
Yonamine, Anne Hitomi [UNESP]. "Estudo das propriedades supercondutoras e da microestrutura do supercondutor Mg'B IND. 2' puro e dopado com compostos de carbono." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/88449.
Повний текст джерелаConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Após a descoberta dos novos supercondutores óxidos no ano de 1986, houve uma intensa busca por outros materiais que apresentassem o fenômeno da supercondutividade. Dentre as novas descobertas encontra-se o diboreto de magnésio, material intermetálico cuja supercondutividade era desconhecida até 2001. Atualmente, este é considerado ter um grande potencial de aplicação real devido a sua simplicidade de confecção e ao baixo custo de resfriamento em cryocoolers, visto que o fenômeno ocorre próximo de 39K. Ao longo de quase uma década muitas pesquisas foram realizadas com os objetivos de melhor conhecer o mecanismo de supercondutividade presente no material, assim como de aperfeiçoar a sua capacidade de suportar correntes em campos magnéticos altos e desta forma ampliar suas possibilidades de aplicação industrial. Hoje, encontra-se claro que o mecanismo que rege a supercondutividade no Mg'B IND. 2' é o mesmo descrito em 1958 por Bardeen, Cooper e Schriefer, na teoria BCS. Mas, por outro lado, as questões práticas permanecem incompletas, pois a queda da capacidade de conduzir supercorrente sob campos magnéticos altos (acima de 6T) ainda não foi superada satisfatoriamente. Com este objetivo, estuda-se a introdução de diversos compostos na matriz do diboreto de magnésio tais como elementos metálicos ou compostos de carbono. Mais recentemente, os estudos se voltaram para a utilização das técnicas de processamento cerâmico a fim de aperfeiçoar a microestrutura e melhor densificar o material. Neste trabalho o estudo da adição de um novo dopante, o hidrocarboneto 'C IND. 8''H IND. 18', é realizado comparativamente à outros dopantes extensivamente citados na literatura como o carbeto de silício e o óleo de silicone. O processo de sinterização de pastilhas ex situ é também investigado para todas...
After the discovery of new superconducting oxides in the year 1986, there was an intense search for other materials that show the phenomenon of superconductivity. Among the new discoveries is magnesium diboride, an intermetallic material whose superconductivity was unknown until 2001. Currently, it is considered to have great potential for real application due to its easy fabrication and low cost cooling as cryocoolers, since the phenomenon occurs around 39K. For almost a decade surveys have been conducted with the objective of better understanding the mechanism of superconductivity in this material, as well as to improve its ability to withstand current in high magnetic fields and thus broaden their scope of industrial application. Today it is clear that the mechanism governing the superconductivity in Mg'B IND. 2' is the same as described in 1958 by Bardeen, Cooper and Schriefer, in the BCS theory. But on the other hand, practical issues remain incomplete, since the fall of the ability to conduct supercurrent in high magnetic fields (up to 6T) has not been satisfactorily overcome. To this end, it has been studied the introduction of several compounds in the matrix of magnesium diboride elements such as metal or carbon compounds. More recently, studies have turned to the use of ceramic processing techniques to improve the microstructure and better densification of the material. In this work the study of the addition of a new doping, 'C IND. 8''H IND. 18' hydrocarbon, is performed compared to other doping compounds that are extensively cited in the literature as silicon carbide and silicon oil. The process of sintering pellets ex situ is also investigated for all these additions in order to obtain denser material and therefore better performance in the transport properties. The used techniques include X ray diffraction, thermal analysis,... (Complete abstract click electronic access below)
Rosas, Olvera Mariana. "KdpF et MgtR : deux peptides membranaires régulateurs de la virulence chez les mycobactéries et salmonelles." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTT039.
Повний текст джерелаThe public health problems caused by bacteria such as Mycobacterium tuberculosis and Salmonella enterica are amplified by the emergence of multi-drug resistant strains, leading to the demand of new antimicrobial strategies. The recent discovery of bacterial membrane peptides that have regulatory effects on membrane protein involved in bacterial virulence makes it possible to envisage innovative "anti-virulence" strategies.My work was focused on the study of two membrane peptides, KdpF and MgtR, in M. bovis BCG and S. typhimurium respectively, which are intracellular pathogens capable of surviving in macrophages. Overexpression of KdpF in M. bovis BCG and MgtR in S. typhimurium, has already been reported to decrease bacterial survival in macrophages. Therefore, I focused on the study of mechanism and biological effect of synthetic KdpF and MgtR peptides.This work allowed me to conclude that endogenous and synthetic KdpF peptides increase the sensitivity of bacteria to nitrosative stress. I propose that this is related to the destabilization of the enzyme nitrate reductase. In addition and for the first time, I have demonstrated that the synthetic KdpF peptide is biologically active and mimics the anti-virulence properties of the endogenous KdpF peptide in macrophages.In the next part of my study, I have shown that the synthetic MgtR peptide reduces the intramacrophage survival of S. typhimurium and I have identified a variant peptide with even stronger action. These two peptides cause a decrease in the level of several proteins of the inner membrane, some of which are recognized as virulence factors.In addition to that, I tested the anti-virulence effect of Salmonella MgtR peptide in mycobacteria. Using a heterologous system, I have shown that the addition of the synthetic MgtR peptide can prevent the dimerization of M. tuberculosis MgtC protein and also promote its destabilization.In conclusion, all my results provide a better understanding of the mechanism of action of KdpF and MgtR membrane peptides and show that the synthetic peptides KdpF and MgtR have promising anti-virulence properties. This is an essential factor to validate the relevance of these molecules as part of innovative, alternative or complementary strategies to antibiotics
Shcherbakova, Olga V. "Development of MgB₂-xCx superconductors and understanding their electromagnetic behaviour." Institute for Superconducting and Electronic Materials - Faculty of Engineering, 2008. http://ro.uow.edu.au/theses/11.
Повний текст джерелаChen, Soo Kien. "Clinical modification of MgB₂ for optimisation of critical current density." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597515.
Повний текст джерелаBartolleti, Flávia. "Avaliação da relação genética e perfil de sensibilidade de Klebsiella pneumoniae resistentes à polimixina B." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/9/9136/tde-21122016-103009/.
Повний текст джерелаINTRODUCTION: The increasing incidence of infections caused by bacteria resistant to multiple antimicrobials increasingly limits therapeutic options, making treatment difficult and increasing the morbidity and mortality and health spending. Over the past five years, this limitation has led to the reestablishment of the use of antimicrobials deemed outdated, such as polymyxins. This group is now used with increasing frequency to treat infections caused by carbapenem-resistant gram-negative microorganisms. Enterobacteria, especially Klebsiella pneumoniae, have often presented this profile, however, resistance to polymyxins have been also reported, eliminating this important therapeutic alternative. Despite the importance of this issue, the publications are scarce on the polymyxins resistance frequency in K. pneumoniae and clonal relationship among isolates resistant to polymyxin B in Brazil. OBJECTIVES: To evaluate the genetic relationship, antimicrobial susceptibility profile and polymyxin B resistance mechanisms in K. pneumoniae. MATERIALS AND METHODS: The execution of this work was divided into two main parts: (i) survey data on routine cultures positive for K. pneumoniae from patients hospitalized in institutions attended by the clinical analysis service of Fleury Health and Medicine; (ii) confirmation of to polymyxin B minimum inhibitory concentrations (MIC), evaluation of clonal relationship by electrophoresis pulsed field gel electrophoresis (PFGE), multilocus sequence typing (MLST), evaluation of the integrity of the mgrB gene and the presence of mcr-1 gene by PCR among isolates resistant to polymyxin B and carbapenems (CPRKp). RESULTS AND CONCLUSIONS: The analysis of 3,085 K. pneumoniae isolates obtained from inpatients from 11 hospitals in the São Paulo urban area between 2011 and 2015, has shown a statistically significant increase in carbapenem resistance from 6.8% in 2011 to 35.5% in 2015. In 2015, KPC was detected in 96.2% of isolates resistant to carbapenems. The polymyxin B MIC distribution of all Klebsiella pneumoniae showed a bimodal distribution with the MIC of 2 mg/L as the cutoff value for polymyxin B susceptibility; thus, 3.6% of the total number of isolates susceptible to carbapenems were interpreted as resistant while this proportion was 22.5% among carbapenem-resistant isolates (CRKp). Among these isolates there was also a statistically significant increase in the annual trend of polymyxin B resistance, from 0% in 2011 to 27.1% in 2015. These rates ranged from 0.7% in 2011 to 3.9% by June 2014 between carbapenem-susceptible isolates. Among alternative antimicrobials, amikacin and tigecycline were the most active compounds. The analysis by PFGE of 60 CPRKp isolates obtained from different patients in the years 2014 and 2015 showed two major clonal groups: CPRKp1 and CPRKp2, which according to the analysis by MLST belong respectively to ST11 and ST437 groups, both from clonal complex 258. We observed the same ST group of isolates obtained within a hospital and between different public and private hospitals. The most common mechanism of polymyxin B resistance among CPRKp isolates was the presence of insertion sequences interrupting the mgrB gene. The mcr-1 gene was not detected in any of the isolates.
Bhatia, Mohit. "MgB2 superconductors: processing, characterization and enhancement of critical fields." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1190055943.
Повний текст джерелаYao, Qiwen. "Study of synthesis, structures and superconducting properties of magnesium diboride MgB₂ material." Access electonically, 2004. http://ro.uow.edu.au/theses/404.
Повний текст джерелаAlix, Eric. "Régulation, fonction et polymorphisme de MgtC : un facteur de virulence conservé chez différentes bactéries pathogènes intracellulaires." Montpellier 2, 2008. http://www.theses.fr/2008MON20028.
Повний текст джерелаMgtC is a virulence factor shared by several intracellular pathogenic bacteria, including Salmonella enterica serovar Typhimurium (S. Typhimurium), Mycobacterium tuberculosis, Brucella suis and Burkholderia cenocepacia. The ΔmgtC mutants of these species are attenuated for replication in macrophages and for growth in a culture medium depleted in Mg2+. In this work, I studied function, regulation and polymorphism of MgtC, in order to get insight into its role in virulence. Analysis of point mutations in S. Typhimurium MgtC protein on conserved residues showed that MgtC function for intramacrophage replication can be dissociated from its function for growth in a Mg2+-depleted medium. This result is interesting for the comprehension of the currently unknown conditions undergone by S. Typhimurium in the phagosome. The major result of this thesis concerns the discovery of a new post-translational regulation mechanism. Indeed, S. Typhimurium MgtC stability is regulated by a 30 aminoacids transmembrane peptide, MgtR, that directly interacts with MgtC to induce its degradation by FtsH protease. This finding highlights the misestimated importance of transmembrane peptides in bacteria. Finally, I studied mgtC polymorphism in M. Tuberculosis, and identified a single nucleotide polymorphism specifically linked to Haarlem genotype, that could be used as an epidemiological marker of this genotype. Altogether, these results confirm MgtC as an interesting target in an antivirulence strategy, and identify MgtR as a potential antagonist of MgtC
JACQUEMARD, PAUL. "Fluid field analysis on a flexible combustor for a hybrid Solar / Brayton system : A numerical study." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-287853.
Повний текст джерелаNya förbättringar av koncentrerade solskålssystem leder till ytterligare fokus på hybridsystem för småskaliga applikationer för elproduktion. Ojämn solstrålning skapar nya krav på förbränningssystem. Detta examensarbete presenterar en CFD-simulering av luftflödet i en ny förbränningsdesign för en kombination av en solfångare med forcerad konvektionskylning och en mikrogasturbin (MGT). Systemet består av en LPP-rörbrännare med radiellt virvelsystem och central pilotbrännare. Studien fokuserar på tryckförlusten vid slaghålsväggen, som används för kylning vid förbränning, och lämplig flödesfördelning mellan reagerande- och förbigående flöde. Värmeöverföring studeras inte på grund av tidsbrist. Ett helt sexkantigt nät med flera zoner i systemet utan bränsleinsprutning har genererats med Ansys ICEM-programvara som använder O-nätfunktioner. En realiserbar k-epsilon-modell används för turbulensmodellering. Flera slaghålsdiametrar studeras för att hitta rätt balans mellan de två strömmarna. Även strömlinjer observeras för att bekräfta placeringen av återcirkulationszoner och kunna rekommendera förbättringar av designen.
Harding, Alexander Stanley. "Single Event Mitigation for Aurora Protocol Based MGT FPGA Designs in Space Environments." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4117.
Повний текст джерелаMoussouni, Malika. "Facteurs bactériens impliqués dans la survie intramacrophagique de Pseudomonas aeruginosa et recherche d’inhibiteurs spécifiques : du modèle expérimental cellulaire au modèle vertébré Danio rerio." Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTT003.
Повний текст джерелаThe increased number of antibiotic-resistant bacteria is a real challenge for medical research. WHO has published a list of very high priority pathogens, which includes Pseudomonas aeruginosa, a bacterium responsible for acute and chronic infections. P. aeruginosa is involved in nosocomial infections and is also the main pathogen responsible of the morbidity and mortality of patients with cystic fibrosis, a genetic disorder caused by mutations in the cftr gene.The macrophage is in the first line of the innate immune defense. The role during infection of the ability of P. aeruginosa to resist to the bactericidal action of macrophages is poorly understood, both in the context of cystic fibrosis or in normal conditions. Virulence factors such as MgtC and OprF have been recently identified as important in the intramacrophage survival of P. aeruginosa. The main objective of our project is to better understand the role of these factors in the establishment of P. aeruginosa infection, to test the contribution of the CFTR channel at this stage, and to develop innovative therapeutic strategy.Since it is important to better control the infection, we propose here to develop a new strategy, in addition to antibiotic therapy, which aims to limit the ability of P. aeruginosa to survive within macrophages. This approach is based on the MgtC target and a natural MgtR inhibitor.We have tested for the first time the effect of MgtR synthetic peptide on P. aeruginosa. MgtR reduces bacterial survival in macrophages, through its action on the MgtC protein, thus validating the biological effect of the synthetic peptide. This antivirulence strategy is combined with a structural approach, to characterize the MgtC/MgtR interaction from a molecular point of view and to study the effect of MgtR on MgtC dimerization. This could ultimately lead to optimize the MgtR peptide in order to test it in an animal model (preliminary studies in the embryo of zebrafish were inconclusive).In addition, I contributed in a study to characterize the bacterial factors involved in the intramacrophage stage of P. aeruginosa. This work revealed the involvement of MgtC and OprF in the expression of the T3SS, itself responsible for a lysis of macrophages by intracellular bacteria. The use of oprF mutant as an "indicator" of the intramacrophage role in vivo, allowed us to show the importance of bactericidal action of macrophage (e.g. phagosomal acidification) in the control of P. aeruginosa infection, both in cultured macrophages and in zebrafish embryo. This vertebrate model is relevant for the study of P. aeruginosa infection, but also for the involvement of CFTR. cftr-/- embryos appear to be highly susceptible to P. aeruginosa infection, and this model could determine the specific contribution of CFTR to the bactericidal action of macrophage.In conclusion, a better understanding of the intramacrophage stage of P. aeruginosa and the bacterial factors involved, may provide a better control of P. aeruginosa infection
Xi, Yiheng. "A cross-level investigation of the effects of leadership style of school principals on teachers' satisfaction and organizational citizenship behavior : the mediating role of trust-in-principal /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202005%20XI.
Повний текст джерелаSong, Jiwen. "Organizational control mechanisms and employee outcomes : processes and configuration /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202005%20SONG.
Повний текст джерелаYao, Kun. "Preventing a crime? exploring the impact of corporate governance on corporate illegal behavior in China /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202006%20YAO.
Повний текст джерелаYang, Jing Yu. "Failure-induced interorganizational learning : entry and survival analysis of Japanese firms in China, 1980-2000 /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202006%20YANG.
Повний текст джерелаLiang, Jian. "Voice behavior in organizations : scale development, psychological mechanisms, and cross-level modeling /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202007%20LIANG.
Повний текст джерелаHuang, Guohua. "Workplace self-concept : a new conceptualization of self-concept in organizations /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202007%20HUANG.
Повний текст джерелаYang, Zhen. "The inter-dependence model revisited : the development of modern banks and the effects on the evolution of piao-hao firms in the context of the Shanghai banking industry, 1847-1940 /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202008%20YANG.
Повний текст джерелаTang, Yi. "A bird known by its note : identity legitimacy, network dynamics, and actor performance in the Hong Kong film industry, 1970-1997 /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202009%20TANG.
Повний текст джерелаWang, Hui. "CEO leadership attributes and organizational effectiveness : the role of situational uncertainty and organizational culture /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202002%20WANG.
Повний текст джерелаIncludes bibliographical references (leaves 106-122). Also available in electronic version. Access restricted to campus users.
Zhong, Jing. "Foreign R & D activities in China : general trends and entry mode choice /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202002%20ZHONG.
Повний текст джерелаIncludes bibliographical references (leaves 65-75). Also available in electronic version. Access restricted to campus users.
Yue, Rui. "Contagion or competition : partner abandonment in Korean television advertising industry, 1985-1996 /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202004%20YUE.
Повний текст джерелаIncludes bibliographical references (leaves 68-81). Also available in electronic version. Access restricted to campus users.
Ling, Jiayin. "A persistent-mode MgB₂ 0.5-T/240-mm solid-nitrogen-cooled magnet for MRI." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/103484.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 137-140).
Magnetic resonance imaging (MRI) has become one of the major noninvasive diagnostic imaging tools today. The annual $5-billion market drives magnet engineers to develop advanced and innovative, high-quality, low-cost, easy-to-operate MRI magnets. Because superconductors carry more than 100 times higher current density than copper, while generating no Joule heat, they are the only practical choice for diagnostic MRI magnets with field strengths above 1 T. A low-temperature superconductor of niobium titanium (NbTi) with a critical temperature of 9.8 K stands out among other superconductors because of its excellent mechanical properties, adequate electromagnetic properties and low manufacturing cost. Since the MRI magnet became available in the 1970s, most commercial superconducting MRI magnets have been of NbTi wire and operated in liquid helium bath at 4.2 K. Nowadays, the sharply increasing price of helium has driven magnet designers to consider other superconductors with higher critical temperature for liquid-helium-free MRI magnets. Discovered in 2001, a new high-temperature superconductor of magnesium diboride (MgB₂) with a critical temperature of 39 K has spurred intensive R&D effort. A combination of high critical temperature, low manufacturing cost, and good in-field performance makes it viable competitor to NbTi and the basis for this thesis study. This dissertation, a result of the 0.5-T/240-mm MgB₂ magnet project performed in the Magnet Technology Division of the Francis Bitter Magnet Laboratory, includes design, construction and operation details of the magnet. Each key component of the magnet, i.e., superconducting joint and persistent-current switch (PCS), was designed and tested to evaluate its performance. Each PCS was designed also to absorb energy when protecting the magnet; its protection performance, as well as switching function, was evaluated before deployed. Each finished coil module was tested separately before assembled to complete the magnet. The magnet was operated in persistent-mode in the temperature range 10-15 K. During operation, this liquid-helium-free magnet was immersed in a volume of solid nitrogen that provided a needed thermal mass to the magnet. Temporal and spatial field homogeneity are critical parameters of MRI magnets. Thus actual fields were measured and compared with the designed values to demonstrate its acceptability to MRI application. Operation also examined and validated a protection technique deployed for this magnet, as protection is one of the vital requirements of the superconducting magnet.
by Jiayin Ling.
Ph. D.
Spurrell, Jessica. "Thermal stability and current transfer in twisted-pair helium gas-cooled MgB₂ DC cables." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/415831/.
Повний текст джерелаYonamine, Anne Hitomi. "Estudo das propriedades supercondutoras e da microestrutura do supercondutor Mg'B IND. 2' puro e dopado com compostos de carbono /." Bauru : [s.n.], 2010. http://hdl.handle.net/11449/88449.
Повний текст джерелаBanca: Raquel de Almeida Ribeiro
Banca: Durval Rodrigues Júnior
Resumo: Após a descoberta dos novos supercondutores óxidos no ano de 1986, houve uma intensa busca por outros materiais que apresentassem o fenômeno da supercondutividade. Dentre as novas descobertas encontra-se o diboreto de magnésio, material intermetálico cuja supercondutividade era desconhecida até 2001. Atualmente, este é considerado ter um grande potencial de aplicação real devido a sua simplicidade de confecção e ao baixo custo de resfriamento em "cryocoolers", visto que o fenômeno ocorre próximo de 39K. Ao longo de quase uma década muitas pesquisas foram realizadas com os objetivos de melhor conhecer o mecanismo de supercondutividade presente no material, assim como de aperfeiçoar a sua capacidade de suportar correntes em campos magnéticos altos e desta forma ampliar suas possibilidades de aplicação industrial. Hoje, encontra-se claro que o mecanismo que rege a supercondutividade no Mg'B IND. 2' é o mesmo descrito em 1958 por Bardeen, Cooper e Schriefer, na teoria BCS. Mas, por outro lado, as questões práticas permanecem incompletas, pois a queda da capacidade de conduzir supercorrente sob campos magnéticos altos (acima de 6T) ainda não foi superada satisfatoriamente. Com este objetivo, estuda-se a introdução de diversos compostos na matriz do diboreto de magnésio tais como elementos metálicos ou compostos de carbono. Mais recentemente, os estudos se voltaram para a utilização das técnicas de processamento cerâmico a fim de aperfeiçoar a microestrutura e melhor densificar o material. Neste trabalho o estudo da adição de um novo dopante, o hidrocarboneto 'C IND. 8''H IND. 18', é realizado comparativamente à outros dopantes extensivamente citados na literatura como o carbeto de silício e o óleo de silicone. O processo de sinterização de pastilhas ex situ é também investigado para todas... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: After the discovery of new superconducting oxides in the year 1986, there was an intense search for other materials that show the phenomenon of superconductivity. Among the new discoveries is magnesium diboride, an intermetallic material whose superconductivity was unknown until 2001. Currently, it is considered to have great potential for real application due to its easy fabrication and low cost cooling as cryocoolers, since the phenomenon occurs around 39K. For almost a decade surveys have been conducted with the objective of better understanding the mechanism of superconductivity in this material, as well as to improve its ability to withstand current in high magnetic fields and thus broaden their scope of industrial application. Today it is clear that the mechanism governing the superconductivity in Mg'B IND. 2' is the same as described in 1958 by Bardeen, Cooper and Schriefer, in the BCS theory. But on the other hand, practical issues remain incomplete, since the fall of the ability to conduct supercurrent in high magnetic fields (up to 6T) has not been satisfactorily overcome. To this end, it has been studied the introduction of several compounds in the matrix of magnesium diboride elements such as metal or carbon compounds. More recently, studies have turned to the use of ceramic processing techniques to improve the microstructure and better densification of the material. In this work the study of the addition of a new doping, 'C IND. 8''H IND. 18' hydrocarbon, is performed compared to other doping compounds that are extensively cited in the literature as silicon carbide and silicon oil. The process of sintering pellets ex situ is also investigated for all these additions in order to obtain denser material and therefore better performance in the transport properties. The used techniques include X ray diffraction, thermal analysis,... (Complete abstract click electronic access below)
Mestre
Yelland, Edward Alexander. "Thermal and magnetic properties of YBa₂Cu₄O₈ and MgB₂ single crystals : an experimental study." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619591.
Повний текст джерелаAl-Hossain, Md Shahriar. "Study of superconducting and electromagnetic properties of un-doped and organic compound doped MgB₂ conductors." Access electronically, 2008. http://ro.uow.edu.au/theses/90.
Повний текст джерелаRodrigues, Mikael Timóteo. "Acoplamento do modelo hidrológico MGB ao modelo atmosférico WRF visando estimar vazão na bacia do rio Paraíba do Meio AL/PE." Universidade Federal de Alagoas, 2012. http://repositorio.ufal.br/handle/riufal/904.
Повний текст джерелаFundação de Amparo a Pesquisa do Estado de Alagoas
Devido o avanço computacional e sua evolução em relação à velocidade e capacidade de memória nos últimos anos, juntamente com ascendência das previsões meteorológicas, o acoplamento entre modelos atmosféricos e hidrológicos tem sido o objeto de estudo em diversas pesquisas nas ultimas décadas. O gerenciamento de grandes bacias hidrográficas é determinado por inúmeras variáveis, sendo a principal, o regime e volume das vazões dos rios. Como os resultados de grandes eventos de precipitação pluviométrica afetam diretamente nos regimes de vazão, este trabalho tem como o objetivo principal o acoplamento do modelo hidrológico MGB IPH com o modelo Atmosférico WRF na geração de vazão na Bacia do Rio Paraíba do Meio (AL/PE). Os dados de precipitação prevista foram simulados pelo modelo WRF e os de precipitação observada e vazão observada concedidos pela Agencia Nacional de Águas ANA, para 3(três) postos pluviométricos e 4 (quatro) fluviométricos, respectivamente. A simulação de vazão foi realizada no modelo hidrológico precipitação vazão MGB-IPH. As análises foram feitas de duas etapas: interpolação por Krigagem-KGM das precipitações previstas e observadas; comparação entre hidrogramas simulados a partir dos dados de precipitações previstas e observadas. Na correlação espacial foram encontrados valores na ordem de 0,54 para as precipitações previstas e 0,92 para as observadas. As simulações de vazões com dados gerados pelo WRF apresentaram testes significativos, com coeficientes de Pearson variando entre 0,46 a 0,56, valores representativos para este tipo de estudo meteorológico e hidrológico. Os coeficientes de Piaerson obtidos através das simulações das vazões dos dados observados apresentaram correlações melhores com valores entre 0,4 a 0,71. O acoplamento de modelos hidrológicos (precipitação-vazão) e modelos atmosféricos podem ser considerados uma técnica útil no auxilio no prognóstico de vazões elevadas. Há uma necessidade eminente na calibração do modelo atmosférico, para que se torne uma ferramenta eficiente e real na elaboração de sistemas de alertas de cheias para bacia do Paraíba do Meio, dentre outras, que serão analisadas posteriormente
HOWARD, JENNIFER DIXON. "DEVELOPMENT OF THE AUDITORY THALAMUS IN THE FERRET." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1022254330.
Повний текст джерелаWu, Yi Sun. "Fabrication of in-situ MgB₂ thin films on Al₂O₃ substrate using off-axis PLD technique." Access electronically, 2007. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20080917.103857/index.html.
Повний текст джерелаEllsworth, Kevin M. "Understanding Design Requirements for Building Reliable, Space-Based FPGA MGT Systems Based on Radiation Test Results." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3159.
Повний текст джерелаTan, Kai Sin. "In situ resistometric phase formation analysis for Nb₃Sn, Nb₃Al and MgB₂ high critical current superconductors." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613914.
Повний текст джерелаAmin, Abdullah Al. "MULTISCALE MULTIPHYSICS THERMO-MECHANICAL MODELING OF AN MGB2 BASED CONDUCTION COOLED MRI MAGNET SYSTEM." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case151385068164148.
Повний текст джерелаMhaya, Amel. "Analyse de la résistance aux antibiotiques chez les entérobactéries et étude d’une potentielle voie alternative aux traitements antibiotiques." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0420.
Повний текст джерелаThe increase of multidrug-resistant bacteria (BMR) to antibiotics is a major public health problem. The first objective of the thesis was to search for the presence of BMR, poorly documented in the community in Tunisia. For the first time, we isolate a Klebsiella pneumoniae belonging to the sequence type ST147 producing carbapenemase NDM-1 in this setting, at Sfax. Our data also indicate an unusually high proportion (47%) of Escherichia coli producing committally two extended-spectrum ß-lactamases. Four of them, with CTX-M-15 and CTX-M-27, are divided into 2 clonal strains of type A-ST617 (2 isolates) and B2-ST131 subclade C2 (2 isolates). All contain a plasmid with the same allelic combination, F31: A4: B1; suggesting a possible dissemination of this replicon. In another study (community-based, Djerba), a multiresistant clonal strain Eh22 of Enterobacter hormaechei, containing a 300 kbp conjugative plasmid of IncHI2, was isolated from 2 patients without apparent epidemiological relationship. The plasmid was sequenced and shows the presence of different resistance genes including 4 genes encoding β-lactamases (blaTEM-1, blaDHA-1, blaCTX-M-3 and blaSHV-12). In a second part, we studied in Eh22, the resistance to colistin (CS), antibiotic of last resort. After selection of an in vitro mutant, we showed for the first time, in Enterobacter spp, that this resistance can be due to a mutation in the gene encoding MgrB, a negative regulator of the 2-component PhoQP system that allows the synthesis of cationic residues on lipopolysaccharide, target of CS. In the last part, bacteriocins-like molecules active on BMR were searched in a collection of Bacillus thurengiensis. One of them, BUPM103, inhibits the growth of BMR. The gene for a potential bacthuricin F103 (11 kDa) was identified by an in silico analysis and it was produced in E. coli. The filtered supernatant secretion showed a growth inhibitory activity against a multiresistant K. pneumoniae, in contrast to control (without secretion). This recombinant bacthuricine could constitute a therapeutic alternative for the BMR treatment
Juřica, Libor. "Rozhraní pro průmyslovou HD kameru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221114.
Повний текст джерелаHohloch, Martina [Verfasser], and Manfred [Akademischer Betreuer] Aigner. "Entwicklung und experimentelle Untersuchung eines Betriebskonzepts für die Mikrogasturbine in einem MGT/SOFC Hybridkraftwerk / Martina Hohloch ; Betreuer: Manfred Aigner." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2020. http://d-nb.info/1207836818/34.
Повний текст джерелаLi, Fuli. "A stress and coping perspective on creativity : a reward for creativity policy as a stressor in organizations = Cong ya li he ying dui de jiao du li jie chuang xin : zu zhi chuang xin jiang li zheng ce zuo wei yi zhong ya li yuan / Li Fuli." access full-text access abstract and table of contents, 2009. http://libweb.cityu.edu.hk/cgi-bin/ezdb/thesis.pl?phd-mgt-b30082468f.pdf.
Повний текст джерела"Submitted to Department of Management in partial fulfillment of the requirements for the degree of Doctor of Philosophy." Includes bibliographical references (leaves 158-173)
Chen, Zhenjiao. "Exploring the underlying mediating processes between intragroup conflict and team outcomes : a social information processing perspective /." access full-text access abstract and table of contents, 2009. http://libweb.cityu.edu.hk/cgi-bin/ezdb/thesis.pl?phd-mgt-b30082353f.pdf.
Повний текст джерела"Submitted to Department of Management in partial fulfillment of the requirements for the degree of Doctor of Philosophy." Includes bibliographical references (leaves 174-195)
Zhang, Yi. "The relationship between organizational authority-control and employees' proactive behavior : the moderating role of individual proactive personality /." access full-text access abstract and table of contents, 2009. http://libweb.cityu.edu.hk/cgi-bin/ezdb/thesis.pl?mphil-mgt-b23750819f.pdf.
Повний текст джерела"Submitted to Department of Management in partial fulfillment of the requirements for the degree of Master of Philosophy." Includes bibliographical references (leaves 117-147)
Murad, Omar Rachid [UNESP]. "Propriedades de transporte eletrônico em filmes finos policristalinos de diboreto de magnésio (MGB IND.2') analisados pelo modelo de Bloch-Grüneisen." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/88505.
Повний текст джерелаO presente trabalho teve como objetivo estudar as propriedades magnéticas e de transporte elétrico de filmes finos de MGBIND.2', de espessura, rescidos pelo método de Pulsed Laser Deposition, diante de variações de conformidade microestrutural. Para efeito de comparação, foram utilizados filmes finos com 100 e 400nm de espessura crescidos pelo método Chemical Vapor Deposition. O trabalho foi possível graças ao desenvolvimento de um sistema de fixação de amostras que mostrou ser eficaz nos casos onde a deposição de terminais com epóxi prata inutiliza as amostras para estudos posteriores devido à contaminação. Foram realizados ensaios de magneto-transporte, magnetização e susceptibilidade magnética utilizando o Physical Property Measurement System (PPMS). Os resultados de magneto-transporte foram modelados matematicamente por meio do modelo de Bloch-Grüneisen, mediante o uso do software Mathematica. A análise dos resultados mostrou que diferenças microestruturais conduzem a um comportamento de resistividade no estado normal diferenciado. A possível existência de uma microestrutura diferenciada, onde há dificuldade em se definir um contorno de grão, e praticamente a inexistência de material intragranular, podem ser a chave para o entendimento de medidas de transporte elétrico e magnéticas tão singulares, onde não há evidências de comportamento inter e intragranular, como ocorre geralmente nos supercondutores cerâmicos. Por último, o modelamento da resistividade permitiu validar todo o sistema de medidas utilizado, pois os resultados obtidos estão em acordo com a literatura.
In this work it was studied magnetic and electrical transport properties of MGB IND.2' thin films, with 200nm of thick, grown by the method of Pulsed Laser Deposition, in front of microstructure variation. For comparison, were also analyzed thin films with 100 and 400nm of thickness grown by Chemical Vapor Deposition method. This study was possible since the development of sample fixing system that showed be effective in the cases that the terminals depositions with silver epoxy make samples useless for the future studies due to contamination. Magnetic-transport, magnetization and magnetic susceptibility were performed using the Physical Property Measurement System (PPMS). The results of magnetictransport measurements were modeled by the Bloch-Grüneisen model through the Mathematica Software. Analysis of the results showed that microstructural differences of the samples make different the value of resistivity in the normal state. Possible existence of the different microstructural where have difficult to define the grain boundary and absent of intergranular material, factors that can the key for the understanding of electrical transport and magnectic measurements how individuals, where no have evidences of inter and intragranular behavior, how exist in the ceramic superconductors. At last, the resistivity model permitted validates all the measurement system utilized, because the results obtained are in agreement with the literature.
Fagundes, Hugo de Oliveira. "Modelagem hidrossedimentológica de grandes bacias com o apoio de dados in situ e sensoriamento remoto." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/175012.
Повний текст джерелаThe use of erosion and sediment transport model at large scales is scarce, mainly due the lack of observed data, necessary in calibration and validation steps. In this context, erosion and sediment transport simulation was carried out using the MGB-SED model and the spatialtemporal dynamics of suspended sediment in the Doce river basin were evaluated. In addition, we investigated the applicability of observed suspended sediment concentration (SSC), turbidity, total suspended solid (TSS) and surface spectral reflectance in the calibration and validation of erosion and sediment transport models for large river basins. The MGB-SED model is the result of the coupling of a sediment module to the large-scale hydrological model MGB-IPH. The MGB-SED is an empirical-conceptual, distributed model that uses a catchmentbased discretization and the hydrological response units (HRU) approach. In the HRUs, volumes of water and sediments (estimated by MUSLE equation) that will be routed in river reaches are generated. Flow routing is performed using a Muskingum-Cunge equation. Sediment transport is performed using a diffusion-advection equation for materials that are suspended (silt and clay) and performed using a sediment continuity equation for bed load (sand). Fourteen experiments to calibration and validation of the MGB-SED model using the observed data were established. Results showed that even using standard values, the MGBSED model presented satisfactory results, with correlations coefficient above 0.50 for more than 60% of the CSS gauges, collaborating to understand the sediment dynamics in the basin. Experiments indicated that results can be improved by: (i) increasing the number of sub-basin; (ii) combine metrics that represent the correlation, the bias, and the amplitude variation; (iii) use the logarithm of SSC instead of SSC directly; (iv) using a background concentration; and (v) use a smaller search interval of calibrated parameters. The application of the model in Doce river basin, in the way it was done, did not allowed to always represent the large SSC peaks. The use of the model allowed to identify some patterns and behaviors in the basin such as the fact that in the dry period the main source of sediments is not slopes but channels. The analysis of the different types of data indicates that the rivers that contribute most for the Doce river sediment load are Caratinga, Suaçuí Grande and Guandu.
Lopes, Vitória Ache Rocha. "Modelagem hidrológica e hidrodinâmica integrada de bacias e sistemas lagunares com influência do vento." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/172898.
Повний текст джерелаHydrological-hydrodynamic modelling of basins, rivers and large water bodies such as lakes and lagoons is usually performed by the external coupling of hydrological-hydraulic models and 2D or 3D hydrodynamic models. Therefore, the river discharges into the lake are calculated by the hydrologic-hydraulic model and then used as an input in the hydrodynamic model. This approach allows for detailed simulation of lake or lagoon hydrodynamics and circulation. However, when the objective is to simulate water levels and flooded areas, this approach may become too costly, making it difficult to stablish operational systems such as flood forecasting. Therefore, in the present study, an integrated approach is proposed by the use of one integrated hydrologic-hydraulic model, the MGB-IPH Inertial model, to simulate such complex systems including wind shear influence in the inertial flood routing algorithm. The study area was the Patos Lagoon basin, located in both Brazil and Uruguay. Results showed that it was possible to use the proposed approach to simulate flooded areas and water levels in the Patos Lagoon and Lake Guaíba. Results of performance indicators were compared to results available in the literature obtained by the use of 2D hydrodynamic models and similarity among them was verified. The influence of the wind shear inclusion on the inertial routing method was analyzed; an abacus and an equation were proposed to estimate the maximum influence wind shear can exert in a system under specific conditions. Improvement of model results were verified with the inclusion of wind effect in the flow routing algorithm, encouraging the use of the modified model in the simulation of other locations susceptible to wind influence. Tests performed allowed for the acknowledgment of factors that influence the modelling approach proposed. More spatially and temporally detailed wind data helped to improve results, such as the use of water level data as downstream boundary condition to include tide effects in the system. Future studies of the proposed model of the Patos Lagoon basin include climate change and land change effects on water levels, historical flood simulations, such as the famous flood of 1941, and the establishment of flood forecasting systems to predict lagoon water levels.
Idrobo, Juan Carlos. "A study of the electronic structure and the effects of oxygen on the superconducting properties of MgB₂ by electron energy loss spectroscopy /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.
Повний текст джерела