Dissertations / Theses on the topic 'Shunka'
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Canino, Michael Francis. "Shunkan: Genesis of a Narrative." Thesis, The University of Arizona, 1995. http://hdl.handle.net/10150/560508.
Full textSullivan, Regina. "The Relationship between Ventriculoperitoneal Shunts and Shunt Revisions versus Visual Complaints among Patients with Spina Bifida in the Arkansas Spina Bifida Research Project." Digital Archive @ GSU, 2012. http://digitalarchive.gsu.edu/iph_theses/231.
Full textBoyd, Louise Anne. "Art, sex, and institutions : defining, collecting, and displaying shunga." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7546/.
Full textShuka, Romeo [Verfasser]. "Parallele adaptive Schwarmsuche für Blackbox-Probleme / Romeo Shuka." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2019. http://d-nb.info/1197227539/34.
Full textSpirakis, Susan E. "Incidence of Unilateral, High Frequency, Sensorineural Hearing Loss in Shunt Treated Hydrocephalic Children Ipsilateral to Shunt Placement." Scholar Commons, 2000. https://scholarcommons.usf.edu/etd/1548.
Full textNjozi, Hamza Mustafa. "Critical artistry in Utenzi wa Shufaka." Universitätsbibliothek Leipzig, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-93065.
Full textKnipper, Barbara Katharina. "Operative Behandlung congenitaler zyanotischer Vitien modifizierter Blalock-Taussig-Shunt versus Kirklin-Shunt /." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971652627.
Full textRamli, Mohd Shamir. "Investigation of circuit breaker switching transients for shunt reactors and shunt capacitors." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/17822/1/Mohd_Shamir_Ramli_Thesis.pdf.
Full textRamli, Mohd Shamir. "Investigation of circuit breaker switching transients for shunt reactors and shunt capacitors." Queensland University of Technology, 2008. http://eprints.qut.edu.au/17822/.
Full textWeststrate, Marnus. "LC-ladder and capacitive shunt-shunt feedback LNA modelling for wideband HBT receivers." Thesis, University of Pretoria, 2011. http://hdl.handle.net/2263/26615.
Full textThesis (PhD(Eng))--University of Pretoria, 2011.
Electrical, Electronic and Computer Engineering
unrestricted
Rodríguez, Cerrón Maritza. "Los Petroglifos de Shunte (Tocache - San Martín)." Master's thesis, Universidad Nacional Mayor de San Marcos, 2021. https://hdl.handle.net/20.500.12672/17892.
Full textLima, Márcia Maria Macêdo. "Infecções em dispositivos neurológicos implantáveis em crianças e adolescentes." Universidade Federal de Sergipe, 2005. https://ri.ufs.br/handle/riufs/3829.
Full textThe management of hydrocephalus by means of a ventriculoperitoneal shunt (VPS) has, as a major threat, surgical infections. Factors, such as cause of hydrocephalus, age below six months, shunt primary insertion, trainaing curve of surgeons, conditions of antisepsis and length of the procedure contribute to the occurrence of infectious complications. The study aimed at determining the incidence, cause, site of ocurrence and clinical and laboratory manifestations of infections in the children and teenagens who underwent VPS in Hospital Gov. João Alves (HGJAF), Aracaju, SE. Fifteen patients were studied prospectively from January 2003 to October 2004. Hospital records were analised and data were obtained during hospital stay and after discharge. The results were analised through Yates Chi-square, Fisher s exact test, relative risk and odds ratio. A confidence interval of 95% was used. All patients underwent VPS because of hipertensive hydrocephalus and subsequent infection rate per procedure was 27.6%. Infection rates according to surgical risk index were 25.7% for risk 0 and 30.4% for risk 1/2 (NNISSCDC). Surgical site infection (deep and superficial) was the major complication (87.5%) with early appearance (mean 27.6 days). Fever was the most frequent sign in 13 of 16 cases. Infection related mortaliy rate was 10% (5/50). However, there was no statistical significance for cause of hydrocephalus (p = 0.858), type of procedure (p = 0.330), age at diagnosis (p = 0.926), pre-operative length of stay (p = 0.172), duration of procedure (p = 0.534, RR = 1.09, IC95% [0.6-2.0]), antibiotic prophylaxis (p = 0.567), previous use of CNS catheter (P = 0.361) and risk index (0, 1, 2) (p = 0.926, RR = 1.07, IC95% [0.76-1.49]. The present study was meant to caracterize the management of hydrocephalus at HGJAF and identify problems that could be mimimized through prevention of infectious complications.
O tratamento cirúrgico da hidrocefalia através da derivação ventrículo peritoneal (DVP), tem nas complicações infecciosas o seu maior desafio. A etiologia da hidrocefalia, crianças menores de seis meses, inserção primária do sistema de derivação, inadequada habilidade técnica da equipe cirúrgica, condições de assepsia e anti-sepsia e duração da cirurgia são alguns dos fatores de risco que contribuem para a persistência das taxas de infecção. A proposta do presente estudo foi determinar a freqüência, as causas, o sítio específico e as manifestações clínicas e laboratoriais das infecções em crianças e adolescentes após a implantação de dispositivos neurológicos no HGJAF (Aracaju-SE). Prospectivamente, foram estudados 50 pacientes entre 0 e 17 anos, submetidos a DVP (58 procedimentos), no período de janeiro de 2003 a outubro de 2004, através de levantamento de dados dos prontuários durante a internação e após a alta hospitalar. Os resultados foram analisados pelo teste do qui-quadrado, teste exato de Fischer, odds ratio e risco relativo. Foi considerado significante valor de p < 0,005. Observou-se que todas as indicações de sistema de DVP foram por hipertensão intracraniana em hidrocefalia e que a taxa de infecção por procedimento (27,6%) e as taxas de infecção de acordo com o índice de risco cirúrgico zero (25,7%) e índice de risco cirúrgico 1 e 2 (30,4%) (metodologia NNISS-CDC) foram elevadas. A infecção de sítio cirúrgico (superficial e cavidade) foi a principal complicação infecciosa (87,5%), com precocidade na sua manifestação (média de 27,6 dias). A manifestação clínica mais freqüente foi a febre com 81,3% (13/16). A taxa de mortalidade por infecção em DVP foi de 10% (5/50). No entanto, não houve significância estatística com relação à etiologia da hidrocefalia (p = 0,858), ao tipo de procedimento (derivação primária e reinserção) (p = 0,330), idade do paciente (p = 0,926), tempo de internação pré-operatória (p = 0,172), duração da cirurgia (p = 0,534, RR = 1,09, IC95% [0,6-2,0]), uso de antibioticoprofilaxia (p = 0,567), uso de cateter SNC prévio (p = 0,361) e índice de risco cirúrgico (0, 1, 2) (p = 0,926, RR = 1,07, IC95% [0,76-1,49]). Este estudo serviu para caracterizar a infecção após implantação de sistema de DVP no HGJAF, apontar problemas a serem discutidos através de uma política de prevenção e intervenção precoces.
Jalan, Rajiv. "Transjugular intrahepatic portosystemic stent-shunt." Thesis, University of Edinburgh, 2000. http://hdl.handle.net/1842/22346.
Full textLopes, Ricardo Manuel Vinagre. "Clínica médica e cirúrgica em animais de companhia: tomografia computorizada no diagnóstico de anomalias vasculares." Master's thesis, Universidade de Évora, 2015. http://hdl.handle.net/10174/14534.
Full textMaurya, Devalāla. "Hindī sāhitya kā itihāsa-darśana aura Rāmacandra Śukla /." Ilāhābāda : Eksīlensa pabliśarsa, 1993. http://catalogue.bnf.fr/ark:/12148/cb36190705w.
Full textMota, Vítor Gomes. "Achados Ecodopplercardiográficos em Pacientes com Doença Hepática Crônica com Shunt Intrapulmonar quando comparados aos sem Shunt." Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/10339.
Full textMade available in DSpace on 2015-03-04T13:35:58Z (GMT). No. of bitstreams: 2 DISSERTAÇÃO Vitor Mota.pdf: 2039318 bytes, checksum: 98ab69c8931a02f123688cc8106268cc (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2013
A doença hepática crônica (DHC) apresenta elevada incidência e prevalência em todo o mundo. Entre as suas principais causas, destacam-se a ingestão crônica e excessiva de álcool, as hepatites virais e a esquistossomose. O ecoDopplercardiograma trasnstorácico contrastado (ETC) é o exame padrão ouro na pesquisa de shunt intrapulmonar (SIP), no diagnóstico da cardiomiopatia cirrótica (CMC) e no rastreio da hipertensão portopulmonar nos pacientes com DHC. Essa pesquisa objetiva verificar as alterações ecoDopplercardiográficas em hepatopatas crônicos com SIP quando comparados ao pacientes sem SIP, tendose a hipótese de que a ocorrência de alterações ecocardiográficas é mais elevada em pacientes com doença hepática e SIP quando comparada aos sem SIP. Consiste de uma revisão sistemática intitulada: ´´O EcoDopplercardiograma na Doença Hepática Crônica``, onde se faz uma análise sobre os artigos publicados avaliando a ocorrência de alterações ecocardiográficas em pacientes com DHC, enfatizando-se o cálculo do volume atrial esquerdo, a identificação da disfunção diastólica no diagnóstico da CMC, protocolos utilizados na pesquisa de SIP e rastreio da hipertensão portopulmonar. Cento e sessenta e oito pacientes foram elegíveis para o estudo, oriundos do ambulatório de hepatologia do Hospital das Clínicas da Universidade Federal de Pernambuco, no período de 2010 a 2012, em Recife, PE. No artigo com título ´´Achados ecoDopplercardiográficos em pacientes com doença hepática crônica com shunt intrapulmonar quando comparados aos sem shunt``, descreveu-se o estudo em detalhes. Em seus resultados observou-se maior ocorrência de disfunção diastólica moderada nos pacientes com SIP (24 vs. 16, P = 0,034). Os pacientes com grau II de SIP apresentaram frequência mais elevada de disfunção diastólica moderada do que os de grau I (16 vs 8, P = 0,028). Não houve diferença estatística em relação ao volume atrial esquerdo entre os grupos (58 vs 55, P = 0,181), bem como na ocorrência de hipertensão arterial pulmonar (25 vs 33, P = 0,963). A presença de SIP, assim como o grau II de SIP apresentaram boa correlação com disfunção diastólica moderada pelo ETC. A disfunção diastólica moderada pareceu ter efeito preditor para aparecimento de SIP.
Van, Greunen Corneluis Erasmus. "Neutral-point-clamped shunt active filter." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1265.
Full textRodgers, Jackie Michele. "The immunology of hydrocephalus shunt infections." Thesis, University College London (University of London), 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246215.
Full textEllero, Bernard. "Shunt veino-veineux en transplantation hepatique." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR1M206.
Full textHeine, Christopher Raphael Tazio. "CT-basierte Untersuchungen zur Korrelation von pulmonaler Belüftungsstörung und Gasaustausch im Tierexperiment." Doctoral thesis, Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-156277.
Full textMokrani, Bilal. "Piezoelectric shunt damping of rotationally periodic structures." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209112.
Full textstructures with extremely low damping which may be responsible for severe vibrations
and possible high-cycle fatigue problems. To solve this, various techniques
of damping enhancement are under investigation. The present work is focused on
piezoelectric shunt damping.
This thesis considers the RL shunt damping of rotationally periodic structures using
an array of piezoelectric patches, with an application to a bladed drum representative
of those used in turbomachinery. Due to the periodicity and the cyclic symmetry of
the structure, the blade modes occur by families with very close resonance frequencies,
and harmonic shape in the circumferential direction; the proposed RL shunt
approaches take advantage of these two features.
When a family of modes is targeted for damping, the piezoelectric patches are
shunted independently on identical RL circuits, and tuned roughly on the average
value of the resonance frequencies of the targeted modes. This independent
configuration offers a damping solution effective on the whole family of modes, but
it requires the use of synthetic inductors, which is a serious drawback for rotating
machines.
When a specific mode with n nodal diameters has been identified as critical and
is targeted for damping, one can take advantage of its harmonic shape to organize
the piezoelectric patches in two parallel loops. This parallel approach reduces considerably
the demand on the inductors of the tuned inductive shunt, as compared
to independent loops, and offers a practical solution for a fully passive integration
of the inductive shunt in a rotating structure.
Various methods are investigated numerically and experimentally on a cantilever
beam, a bladed rail, a circular plate, and a bladed drum. The influence of blade
mistuning is also investigated.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Yiauw, K. H. "An investigation of shunt active power filters." Thesis, Swansea University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636711.
Full textGripp, Jorge Augusto de Bonfim. "Piezoelectric shunt damping using adaptive resonant circuits." Instituto Tecnológico de Aeronáutica, 2015. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=3307.
Full textFredriksson, Daniel, and Göransson Milou Carlfors. "Evaluation of Shunt Distancein Resistance Spot Welding." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277903.
Full textSyftet med denna studie var att skapa en större förståelse för hur shuntavståndet påverkar det shunt-fenomen som uppstår när man arbetar med punktsvetsning (RSW). Shuntning påverkar svetsens kvalitet och målet var att skapa riktlinjer för arbete med RSW för att minimera shunt-effektens påverkan på svetsen. I syfte att kunna minimera spill i produktionen samt att minska svetstiden krävs det förståelse av vad shunt effekten beror på. För att utvärdera vilken påverkan shuntavståndet kommer att ha på svetsen utfördes två olika experiment. I det första experimentet skapades en endimensionell svetslob för varje material och det genererade strömintervallet jämfördes över tre olika shuntavstånd. Det andra experimentet bestod av svetsning med en lika stor ström vid olika shuntavstånd för att undersöka hur detta skulle påverka den andra svetsen. En rad olika stålsorter och plåttjocklekar användes för att ytterligare se vilken påverkan dessa faktorer kom att ha på shunteffekten. Resultatet visade att shuntavståndet hade liten inverkan på det acceptabla svetsströmintervallet, med mindre avvikelser. Emellertid påverkar shuntavståndet storleken på den shuntade svetsen genom att storleken minskar när shuntavståndet minskas. Sammantaget räcker inte de uppgifter som samlats in i denna studie för att skapa riktlinjer som skulle kunna implementeras i dagens industri, utan det krävs mer data för att fullständigt kartlägga shunteffekten.
Poincloux, Laurent. "Shunt portosystémique par échoendoscopie sur modèle animal." Thesis, Clermont-Ferrand 1, 2016. http://www.theses.fr/2016CLF1MM08.
Full textTherapeutic endoscopic ultrasonography is a growing and essential part of the medical and surgical activity in digestive pathology since the development of sectoral probes. The fields of application of this minimally invasive interventional technique are more and more numerous, on the one hand in biliopancreatic and enteral pathology, allowing the realization of anastomoses without traditional surgery, and on the other hand in digestive oncology, because it makes it possible to deliver a therapeutic agent, a source of radiation or cells linked to the immune system in a targeted lesion. The vascular approach is a recent and promising way of interventional endoscopic ultrasound offering therapeutic perspectives in hepatology, especially in the field of portal hypertension.This work is divided into three parts successively describing the state of the art of the applications of interventional ultrasonoscopy, then two original experimental works: initially, the transfer of the technique of biliodigestive anastomosis (performed regularly in our center ) at the portosystemic vascular approach on healthy animal, then in a second time the validity of the animal model technique of liver fibrosis.The first series of experiments led to the development of the technique for the creation of an intrahepatic shunt portosystemic by echoendoscopy in 23 healthy pigs, in collaboration with the vascular radiology team. These procedures were performed in an experimental vascular catheterization room (Caviti laboratory) as part of the ISIT host laboratory (Image Science for Interventional Techniques, Prof. L. Boyer, Pr. J.-Y.Boire, UMR CNRS / UDA 6284). The results were conclusive since the shunt appeared feasible in 91% of cases, functional in 81% of cases with a morbidity of 14.2%. The second series of experiments validated this endoscopic ultrasound technique in a porcine model of liver fibrosis by X-ray embolization, in collaboration with Theix National Institute for Food Research for Animal Stabling. This multidisciplinary work has allowed close collaboration between endoscopists, radiologists, visceral surgeons and anatomopathologists, as part of a transversal research approach. The results are encouraging since a porto-systemic intrahepatic shunt by endoscopic ultrasonography proved to be technically feasible and functional on a hepatic fibrosis model with a 7-day survival of the animals in two-thirds of the cases. Before considering a primary study in humans, additional studies are nevertheless necessary on porcine models presenting hepatic fibrosis associated with portal hypertension by increasing the duration of stabulation, by homogenizing the procedure of skeletonization of the hepatic artery and by adjusting the dose of injected solution. This technique could eventually be an alternative in case of failure of the standard technique for complications of portal hypertension (intrahepatic portosystemic shunt transjugular) in patients then in a situation of therapeutic impasse
Fan, Shuxia [Verfasser], and Steffen [Akademischer Betreuer] Massberg. "Calcium signaling in platelet migration / Shuxia Fan ; Betreuer: Steffen Massberg." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2018. http://d-nb.info/1230754474/34.
Full textDUCOIN, HENRI. "Shunts portosystemiques intrahepatiques : etude histopathologique a propos de 22 cas." Toulouse 3, 1994. http://www.theses.fr/1994TOU31552.
Full textZhou, Biao. "Etude de l'amortissement piézoélectrique shunté appliqué aux roues aubagées désaccordées." Phd thesis, Ecole Centrale de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00945457.
Full textShukla, Aditi [Verfasser]. "Analysis of overlapping reading frames in viral genomes / Aditi Shukla." Lübeck : Zentrale Hochschulbibliothek Lübeck, 2016. http://d-nb.info/1103156020/34.
Full textCui, Shuna [Verfasser], and Ursula [Akademischer Betreuer] Bilitewski. "The cellular and molecular properties of genistein against C. albicans infection / Shuna Cui ; Betreuer: Ursula Bilitewski." Braunschweig : Technische Universität Braunschweig, 2011. http://d-nb.info/1175826618/34.
Full textSu, Yingjun, and 蘇穎君. "The emerging regulatory state in China: a study of Shunde's experience." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31227831.
Full textThierry, Olivier. "Réduction des vibrations de structures composites complexes par dispositifs piézoélectriques shuntés : application aux aubes de turbomachines." Thesis, Paris, CNAM, 2016. http://www.theses.fr/2016CNAM1111/document.
Full textThis thesis concerns the vibration reduction in the low frequency range of a composite fan blade of a turbojet engine with piezoelectric devices. The interest is to increase lifespan and avoid flutter phenomena by reducing the vibration amplitude. The purpose of this thesis is to study several shunted piezoelectric devices, in the low frequency range, that can be applied to a woven composite turbojet fan blade. The targeted applications are the LEAP fan blades or the “open-rotor” fan blade, both of them required to manage a complex geometry. The solutions investigated used piezoelectric elements coupled to a passive or semi-passive circuit. The core of this thesis, still a scientific obstacle at present, is to propose efficient solutions that integrate the piezoelectric elements to the fan blades in order to meet aerodynamic constraints for this type of structure, while increasing damping level on one of the first modes of vibration. The performances of such devices are directly related to a coefficient: the electromechanical coupling factor that requires to be maximized. This coefficient depends on all the features of the structure: materials used (host composite structure, piezoelectric material), but especially the placement and geometry of the piezoelectric elements. The use of piezoelectric material connected to active, semi-passive or passive circuits has been extensively studied but the experiences almost always deal with academic cases such as beams or plates. The aim is for the developed piezoelectric device, to evaluate the damping performance of a weakly damped massive structure.A part of the work is thus to develop a predictive finite element model of the structure coupled to the piezoelectric material to quantify the performance of the device. Several solutions are tested on a simple structure to evaluate the influence on the device performance of, (1) the choice of the piezoelectric material, (2) the placement and geometry of the piezoelectric elements, and (3) of the dissipative circuit. Various integration solutions in the blade are proposed and a method for characterizing the properties of woven materials is developed in the perspective of integrating the active materials in the composite preform.This study is both numerical and experimental: a demonstrator using a composite fan blade is designed and tested in the laboratory to validate the proposed concepts
Uz, Eda. "Design And Implementation Of Thyristor Switched Shunt Capacitors." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611616/index.pdf.
Full textSedighy, Mohammad. "A robust VSC-based shunt active power filter." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0002/NQ41307.pdf.
Full textHaugan, Thomas Sagvold. "Smart Grid: Shunt Compensation in Non-Sinusoidal Regimes." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-20732.
Full textEl-Habrouk, Mohamed. "A new configuration for shunt active power filters." Thesis, Brunel University, 1998. http://bura.brunel.ac.uk/handle/2438/5241.
Full textStabile, Alessandro. "Electromagnetic shunt damper for spacecraft micro-vibration mitigation." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/845703/.
Full textWelgemoed, Frans Marx. "Shunt reactive compensation of voltage dips and unbalance." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5315.
Full textENGLISH ABSTRACT: The use of power electronic converters provides a more efficient, accurate and dynamic solution to reactive compensation. In this thesis the application of power electronic converters to shunt reactive compensation will be discussed. In particular voltage dips and voltage unbalance are considered as both can be mitigated by means of shunt reactive compensation. A pre-existing uninterruptible power supply is adapted to operate as a shunt reactive compensator. The uninterruptible power supply consists of a 250 kVA three phase voltage source inverter. The modifications are limited to software and control algorithms that do not alter the normal operation of the uninterruptible power supply. Control algorithms are designed and discussed in detail. A typical double loop control strategy is implemented on the power electronic converter. The inner loop consists of a dead-beat current controller. The outer loop consists of three proportional and integral controllers controlling the DC-bus voltage, AC voltage and voltage unbalance respectively. Voltage dips and unbalance are compensated for using only reactive power. Focus is placed on producing a result can be used easily in practice.
AFRIKAANSE OPSOMMING: Drywings elektroniese omsetters wat gebruik word vir newe reaktiewe kompensasie lewer meer effektiewe, akkurate en dinamiese resultate. In hierdie tesis word die toepassing van drywings elektroniese omsetters vir newe reaktiewe kompensasie bespreek. Daar word meer spesifiek na spannings duike en spannings wanbalans gekyk aangesien albei met newe reaktiewe kompensasie verminder kan word. ’n Bestaande nood kragbron is aangepas om as n newe reaktiewe kompenseerder te funksioneer. Die nood kragbron bestaan hoofsaaklik uit ’n 250 kVA drie fase omsetter spanningsbron. Die aanpassings is beperk tot sagteware en beheer algoritmes wat nie die oorspronklike funksionaliteit van die nood krag bron beinvloed nie. Beheer algoritmes word ontwerp en deeglik bespreek. ’n Tipiese dubbel lus beheer strategie word op die drywings elektroniese omsetter toegepas. Die binnelus bestaan uit ’n voorspellende stroom beheerder. Die buite-lus bestaan uit drie proportioneel en integraal beheerders wat onderskeidelik die GS-bus spanning, WS spanning en spanning wanbalans reguleer. Spannings duike en wanbalans is verminder deur slegs reaktiewe drywing te gebruik. Die doel was ook om ’n prakties bruikbare resultaat te lewer.
Patil, Ashok R. "High power shunt regulation of spacecraft solar arrays." Diss., Virginia Tech, 1995. http://hdl.handle.net/10919/40216.
Full textVan, der Toorn Sean. "The protection of high-voltage shunt capacitor banks." Master's thesis, University of Cape Town, 1999. http://hdl.handle.net/11427/19565.
Full textThe use of shunt capacitor bank equipment is essential if a utility wishes to control the flow of reactive power effectively. The most significant results stemming from this will be lower losses on the system and an increased power transfer capability. Thus it is important that the methods used to protect a shunt capacitor bank will ensure that the bank is available when required. While the more common shunt capacitor problems are related to capacitor unit failures, conditions such as bank over currents, surge voltages and harmonics can cause extended undesired conditions. Today's protection methods are able to remove a shunt capacitor bank from service before extensive damage is done, although the location of the faulty capacitor units will not be known (if this was in fact the reason for the protection tripping the bank). This thesis explores the subject of improving the protection of high-voltage shunt capacitor banks, specifically with respect to the detection of unhealthy fuseless capacitor units. An extensive literature search was carried out on the theory pertaining to the protection of shunt capacitor banks, and a model of a fuse less shunt capacitor bank was built in the laboratory to better understand the failing process of an element within a capacitor unit. The changes in the capacitor unit's current and voltage profiles, as well as those of the remaining healthy capacitor units, were monitored as an element failure was simulated (whereby the element forms a solid weld, or short circuit).Stemming from these experiments, it was found that where a bank consists of strings of units with no interconnection between the units of different strings, an element failure in a capacitor unit would cause a significant decrease in voltage across the affected unit. This voltage change could be used to identify when elements are failing in capacitor units, and the location of the unhealthy unit could also be determined. One potential method would be to have capacitor units with built-in voltage transformers attached across each element section in the unit. As element failures occur either send this information to ground level, where it can be read by a microprocessor relay device, or have a display on the outside of the capacitor unit. In the case of the change in unit current, it was found to be very small and thus had no function for detecting unhealthy capacitor units.
Smith, Joanna. "Parents' management of their child's hydrocephalus and shunt." Thesis, University of Leeds, 2010. http://etheses.whiterose.ac.uk/1911/.
Full textAslan, Seda. "A Computational Fluid Dynamics Study on Bidirectional Glenn Shunt Flow with an Additional Pulsatile Flow Through a modified Blalock-Taussig Shunt." ScholarWorks@UNO, 2017. http://scholarworks.uno.edu/td/2294.
Full textTatge, Lena [Verfasser], and Thomas [Akademischer Betreuer] Mir. "Retrospektiver Vergleich zweier palliativer Operationsverfahren bei Kindern mit verminderter Lungendurchblutung : Modifizierter Blalock-Taussig Shunt versus Central Shunt / Lena Tatge. Betreuer: Thomas Mir." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2013. http://d-nb.info/1033403334/34.
Full textHau, Hans Michael, Peter Fellmer, Markus B. Schoenberg, Moritz Schmelzle, Mehmet Haluk Morgul, Felix Krenzien, Georg Wiltberger, Albrecht Hoffmeister, and Sven Jonas. "The collateral caval shunt as an alternative to classical shunt procedures in patients with recurrent duodenal varices and extrahepatic portal vein thrombosis." Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-151556.
Full textArnell, Kai. "Cerebrospinal Fluid Shunts in Children : Technical Considerations and Treatment of Certain Complications." Doctoral thesis, Uppsala University, Department of Surgical Sciences, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8295.
Full textVentriculo-peritoneal shunting is the most commonly used method for the treatment of paediatric hydrocephalus. Despite improved shunts and surgical techniques there are still complications. This retrospective study focuses on diagnoses and treatment of shunt malfunction and infections. Cost/benefit of using an adjustable shunt was assessed. Two adjustable cerebrospinal fluid shunts and their compatible antisiphon devices were compared in-vitro.
In 21 of 46 children the standard shunt was changed to an adjustable one due to over-drainage. Adjustment of the shunt was performed in 73% of the children thereby avoiding surgery in several cases. This was a financial advantage.
Ascites or an abdominal pseudocyst without infection was detected in eight children due to resorption difficulties. A ventriculo-atrial shunt was inserted for a period of time. In three children it could successfully be reverted to a ventriculo-peritoneal.
In six children papilloedema was the only sign of shunt dysfunction. At revision the intracranial pressure ranged from 25 to 52 cm H2O. Fundoscopic examination in children older than 8 years may detect symptomless shunt malfunction.
During a 13-year period 39 shunt infections were diagnosed. Skin bacteria were found in 80%. Prolonged and anaerobic cultures increased the detection rate by more than one third. The intraventricular infections were treated with intraventricular and systemic antibiotics resulting in quick sterilisation. No relapses were encountered. In five older children with distal catheter infection Propionibacterium acne was found. These were treated with intravenous antibiotics and exchanging of the shunt system.
Strata NSCTM and Codman HakimTM worked according to the manufacturers except at the lowest setting. The resistance was below and in the lower range of the physiological one respectively. The antisiphon device of Strata shunt had to be placed in line with shunt to function properly.
Sénéchal, Aurélien. "Réduction de vibrations de structure complexe par shunts piézoélectriques : application aux turbomachines." Phd thesis, Conservatoire national des arts et metiers - CNAM, 2011. http://tel.archives-ouvertes.fr/tel-00862517.
Full textBraun, Marlon Alexander [Verfasser], and P. [Akademischer Betreuer] Shukla. "Scalarized Preferences in Multi-objective Optimization / Marlon Alexander Braun ; Betreuer: P. Shukla." Karlsruhe : KIT-Bibliothek, 2018. http://d-nb.info/1159637571/34.
Full textLi, Xiangnong. "The role of intrahepatic shunts in the normal and cirrhotic rat liver." Thesis, King's College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271055.
Full textHong, Jeesoon. "Gendered modernism of Republican China : Lu Yin, Ling Shuhua and Zhang Ailing." Thesis, University of Cambridge, 2004. https://www.repository.cam.ac.uk/handle/1810/284028.
Full textBasseau, Fabrice. "Etude des débits dans les shunts d'hémodialyse par " color velocity imaging quantification "." Bordeaux 2, 1999. http://www.theses.fr/1999BOR23025.
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