Дисертації з теми "Substrate mapping"
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ANDERSON, DARYA NICOLE. "MAPPING MICROBIAL SUBSTRATE UTILIZATION ACROSS A PERMAFROST THAW GRADIENT." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/612547.
Повний текст джерелаBenson, Bryce Eric. "Mapping the Substrate of Atrial Fibrillation: Tools and Techniques." ScholarWorks @ UVM, 2016. http://scholarworks.uvm.edu/graddis/634.
Повний текст джерелаArvanitogiannis, Andreas. "Mapping the substrate for brain stimulation reward, new approaches to an old problem." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0005/NQ40304.pdf.
Повний текст джерелаBALIEIRO, Andson Marreiros. "Cognitive radio virtual networks environment: definition, modeling and mapping of secondary virtual networks onto wireless substrate." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/16360.
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FACEPE
The wireless technologies are progressing at a rapid pace such that the future of digital communication will be dominated by a dense, ubiquitous and heterogeneous wireless network. Along with this, there is a growing demand for wireless services with different requirements. In this respect, the management of this complex wireless ecosystem becomes challenging, and the wireless virtualization is pointed as an efficient solution to perform it, where different virtual wireless networks can be created, sharing and running on the same wireless infrastructure, and providing differentiated services to users. However, to satisfy the high demand for mobile communications, it is necessary the availability of a natural and scarce resource, the electromagnetic spectrum. Although the insertion of virtualization in wireless networks provides better resources utilization, the current approaches to employ the wireless virtualization can cause resource underutilization. To overcome this underutilization and enable that new wireless virtual networks can be deployed, the wireless virtualization can be combined with the cognitive radio technology and dynamic spectrum access (DSA) techniques in order to achieve the deepest level of wireless virtualization and to improve the resource utilization through the deployment of opportunistic resource sharing. Thus, virtual wireless networks with different access priorities to the resources (e.g. primary and secondary) can be deployed in an overlay form, sharing the same substrate wireless network, where the secondary virtual network (SVN) accesses the resources only when the primary one (PVN) is not using them. However, this new scenario brings new challenges: from the mapping to operation of these networks. The SVN mapping is a NP-hard problem and presents some constraints and objectives related to both PVNs and SVNs. Achieving all objectives simultaneously is a challenging process. This thesis addresses the SVNs mapping problem onto substrate network considering the existence of the PVNs on the same substrate network. It discloses the environment composed by these networks, denoted as cognitive radio virtual network environment (CRVNE), models this environment by using a M/M/N/N queue with preemptive and priority service, and delineates a multi-objective problem formulation for the SVNs mapping. Moreover, a scheme based on Genetic Algorithms to solve the SVNs mapping problem is proposed and evaluated in terms of collision, secondary user (SU) dropping, and SU blocking probabilities, and joint utilization, achieving better results than other based on the First-Fit strategy.
Recentemente, as tecnologias sem fio estão progredindo rapidamente de modo que o futuro da comunicação digital será dominado por uma rede sem fio densa, ubíqua e heterogênea. Adicionado a isso, existe uma demanda crescente por serviços sem fio com diferentes requisitos. Neste aspecto, o gerenciamento deste ecossistema complexo se tona desafiador e a virtualização sem fio é apontada como uma solução eficiente para realizá-lo, onde redes virtuais sem fio diferentes podem ser criadas, compartilhando e executando sobre a mesma infraestrutura de rede sem fio e provendo serviços diferenciados aos usuários. Entretanto, para satisfazer à alta demanda por comunicação móvel é necessária a disponibilidade de um recurso natural e escasso, o espectro eletromagnético. Embora a inserção de virtualização em redes sem fio forneça maior utilização dos recursos, as abordagens atuais para empregar a virtualização sem fio podem causar subutilização de recursos. Para superar esta subutilização, a virtualização sem fio pode ser combinada com a tecnologia de rádio cognitivo e técnicas de acesso dinâmico ao espectro (DSA) para alcançar o mais profundo nível de virtualização sem fio e melhorar a utilização de recursos através do compartilhamento oportunista deles. Assim, redes virtuais sem fio com diferentes prioridades de acesso aos recursos (ex. primária e secundária) podem ser implantadas sobrepostas, compartilhando a mesma infraestrutura de rede sem fio, onde as redes virtuais secundárias (SVNs) acessam os recursos somente quando as redes virtuais primárias (PVNs) não os estiverem utilizando. Entretanto, este novo cenário traz novos desafios, desde o mapeamento até a operação destas redes. O mapeamento de SVNs é um problema NP-difícil e apresenta restrições e objetivos relacionados tanto às PVNs quanto às SVNs. Alcançar todos os objetivos simultaneamente é um processo desafiador. Esta tese aborda o problema de mapeamento de SVNs em redes de substrato considerando a existência de PVNs na mesma rede de substrato. Ela apresenta o ambiente de redes virtuais de rádio cognitivo (CRVNE), modela este ambiente utilizando uma fila M/M/N/N preemptiva e com prioridade e delineia uma formulação multiobjetivo para o mapeamento de SVNs. Além disso, um esquema baseado em Algoritmos Genéticos (GA) para resolver o problema de mapeamento de SVNs é proposto e avaliado em termos das probabilidades de colisão, descarte de usuário secundário (US), bloqueio de US e utilização conjunta, alcançando melhores resultados do que um esquema baseado na estratégia First-Fit.
Berte, Benjamin. "Characterization by imaging and high-density electrophysiology of substrates and ventricular arrhythmias." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0150/document.
Повний текст джерелаRadiofrequency (RF) catheter ablation is an effective treatment strategy for scar-related ventricular tachycardia (VT), resistant to anti-arrhythmic drugs and intracardiac defibrillator (ICD) placement. The goal of this thesis was to better understand and characterize the arrhythmogenic VT substrate in different cardiomyopathic processes: ischaemic cardiomyopathy (ICM), non-ischaemic cardiomyopathy (NICM), arrhythmogenic right ventricular cardiomyopathy (ARVC) and myocarditis. For this purpose, we combined high resolution imaging including different modalities and high resolution electrical mapping to better understand the structure-function relationship. We focused on multiple different aspects of VT ablation as outlined below. The first part of this thesis focuses on the role of multipolar mapping catheters and imaging to analyze their structural and functional relationship. We demonstrated superiority of high density mapping with multipolar mapping on conventional mapping in detection of scar, channels, local abnormal ventricular activity (LAVA) and sensitivity for near field signals. The second part of this thesis focuses on ablation of epicardial VT substrate. We demonstrated the efficacy and safety of epicardial only procedures in a highly selected population. We used imaging to have access to the exact anatomy of the heart, to image the substrate but also to increase the safety of ablation procedures by imaging the phrenic nerve and the coronary artery system. The third part of this thesis focuses on analysis of the mapping and ablation of potential targets for scar-related VT ablation. Within this context, we identified predictors of interesting ablation (LAVA) sites based on preprocedural imaging. We also analyzed the role of alternative strategies such as bipolar ablation, ethanol ablation and irrigated needle ablation to ablate intramural and intraseptal substrate, 18 often resistant ablation targets. Overall, we demonstrate that novel imaging, mapping and ablation techniques potentially improve the outcome of VT ablation
Liuba, Ioan. "Focal atrial tachycardia : Insights concerning the arrhythmogenic substrate based on analysis of intracardiac electrograms and inflammatory markers." Doctoral thesis, Linköping : Department of Medical and Health Sciences, Linköping University, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-20461.
Повний текст джерелаMao, Jifeng. "Modeling of simultaneous switching noise in on-chip and package power distribution networks using conformal mapping, finite difference time domain and cavity resonator methods." Diss., Available online, Georgia Institute of Technology, 2005, 2004. http://etd.gatech.edu/theses/available/etd-10062004-125025/.
Повний текст джерелаMadhavan Swaminathan, Committee Chair ; Sung Kyu Lim, Committee Member ; Abhijit Chatterjee, Committee Member ; David C. Keezer, Committee Member ; C. P. Wong, Committee Member. Vita. Includes bibliographical references.
Georget, Elodie. "Preuve de concept d'une liaison radio mer-air d'une balise autonome de petites dimensions - Projet BELOCOPA : conception d'antennes multi-bande sur substrat souple." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4728.
Повний текст джерелаThis thesis is part of the BELOCOPA project FUI-2011 (BELOCOPA means Ejected Buoy to LOcalize and COllect the data of a crashed plane in sea). It was about designing and developing an on-board, removable and autonomous, equipment to localize quickly and precisely an aircraft crashed in the sea, and to collect by telecommunication the main flight data from a patrol boat. The aim of this thesis, in the Fresnel Institute, was the study and the realization of the main antenna of the beacon. This antenna had to be very flexible with small dimensions to be folded and integrated in a reduced space of the beacon, and had to be strong during its deployment after the ejection of the plane. The aim of the first part of the work was to characterize in term of permittivity the different dielectric materials included in the composition of the beacon, namely the substrates of the antennas and the radome. The second part of the thesis was on the design of multi-band antennas working in dipolar modes on the frequency plan of the specification of the project. The characteristic of these antennas is to be very flexible. This flexibility was obtained realizing metal radiating pattern on a polyamide material. Several patterns have been studied and tested to get the final antenna with meander working at three different resonance frequencies. Following this study, a prototype of the final antenna integrated in the radome is the last link of the prototype of the distress beacon BELOCOPA
Cooley, Paul M. "Mapping the nearshore substrates and hydrodynamics in lakes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq23264.pdf.
Повний текст джерелаMartinez, Marine. "Rôle des fibres de Purkinje dans le substrat arythmogénique et la mort subite." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0368/document.
Повний текст джерелаArrhythmias that lead to sudden death have previously been associated with a specializedcell type, the Purkinje fibers (PF). They form the cardiac conduction system, and have a majorrole in the electrical impulse and synchronous activation of the ventricles. However, they maybe involved in pro-arrhythmic phenomena causing the initiation or maintenance of ventricularfibrillation (VF) in structurally normal and a broad spectrum of cardiac diseases.Nevertheless, electrophysiological and structural characteristics of PF and mechanismsunderlying Purkinje-related arrhythmias are poorly understood. It is hypothesized thatthe Purkinje system plays an important role as a substrate for arrhythmias due to, in part,its impact on transmural repolarization heterogeneity.Here within are six studies describing electrophysiological and macro/micro structuralproperties of sheep and human left ventricles using a combination of conventional andinnovative methods.Results showed that PF, through junctions with the myocardium, locally modulatedthe action potential duration and played a role in the dispersion of repolarization. Therefore,revealing a potential role for PF in both, trigger and maintenance of VF.This work opens new therapeutic perspectives in preventive treatment of ventriculararrhythmia to fight against sudden cardiac death
Saura, Valls Marc. "Kinetic studies of a xyloglucan endotransglycosylase, a key enzyme in plant cell morphogenesis." Doctoral thesis, Universitat Ramon Llull, 2007. http://hdl.handle.net/10803/9306.
Повний текст джерелаEs dissenya i es valida un nou assaig enzimàtic mitjançant electroforesis capil·lar (HPCE), que permet l'estudi cinètic de les XET, emprant oligosacàrids de baix pes molecular de xiloglucà amb una estructura coneguda. Aquest substrats han estat sintetitzats en el present treball i també per l'equip del Dr. Driguez en el CERMAV-CNRS.
Es determina que el màxim d'activitat de la Ptt-XET16A es dóna entre pH 5 i 5.5 i entre 30 i 40 ºC. Es demostra que aquest enzim actua mitjançant un mecanisme cinètic bi-bi ping-pong, en el que l'acceptor actua com a inhibidor competitiu del donador unint-se a l'enzim lliure i en el que, depenent del donador emprat, aquest també poc actuar com a inhibidor competitiu de l'acceptor, unint-se als subsetis positius de l'intermedi glicosil-enzim i donant diferent reaccions secundàries com són la polimerització del donador o l'elongació del producte, només en el cas que el donador presenti un grup glucosil en l'extrem no reductor.
S'avalua un llibreria de xilogluco-oligosacàrids sintetitzada per l'equip del Dr. Driguez al CERMAV-CNRS com a donadors de la Ptt-XET16A. D'aquesta forma s'aprofundeix en el coneixement de l'activitat de les XTH, en el coneixement de la seva especificitat per substrat i es realitza un mapeig del centre actiu, obtenint la contribució dels diferents subsetis de la Ptt-XET16A en l'estabilització de l'estat de transició de la reacció de transglicosidació catalitzada per l'enzim estudiat.
Finalment, s'ha dissenyat un substrat bifluorogènic derivat del tetradecasacàrid emprat com a substrat estàndard en el present treball, per mesurar les activitats hidrolasa i transglicosilasa de les XETs mitjançant fluorescence resonance energy transfer (FRET). El substrat bifluorogènic ha estat obtingut i caracteritzat, tanmateix, no s'ha pogut demostrar si aquest substrat és adequat per mesurar les activitats hidrolasa i transglicosilasa de les XETs ja que les propietats fluorescents del marcador s'han perdut en el procés de síntesis del substrat.
El presente trabajo de investigación se enmarca en un proyecto Europeo llamado E.D.E.N. (Enzyme Discovery in hybrid aspen for fibre ENgineering, QLK5-CT-2001-00443), el objetivo del cual es la identificación de nuevos enzimas vegetales para entender con mayor profundidad los procesos de formación y modificación de las fibras vegetales para abordar en el futuro la mejora de los parámetros de calidad de estas fibras, mediante la generación de líneas transgénicas de plantas. En el presente proyecto se pretende profundizar en el conocimiento de las xiloglucano endotransglicosilasas (XET), enzimas claves en la construcción y modificación controlada de la red de xiloglucano-celulosa, estudiando su mecanismo de acción y su especificidad por sustrato. En este trabajo se estudia una XET de Populus tremula x tremuloides, concretamente la XET16A (Ptt-XET16A).
Se diseña y se valida un nuevo ensayo enzimático mediante electroforesis capilar (HPCE), que permite el estudio cinético de las XET, utilizando oligosacáridos de xiloglucano de bajo peso molecular y de estructura conocida como sustratos. Estos sustratos han estado sintetizados en el presente trabajo y también por el equipo del Dr. Driguez en el CERMAV-CNRS.
Se determina que el máximo de actividad de la Ptt-XET16A se da entre pH 5 y 5.5 y entre 30 y 40 ºC. Se demuestra que este enzima actúa mediante un mecanismo cinético bi-bi ping-pong, en el que el aceptor actúa como inhibidor competitivo del dador uniéndose al enzima libre y en el que, dependiendo del dador utilizado , éste también puede actuar como inhibidor competitivo del aceptor uniéndose en los subsitios positivos del intermedio glicosilo-enzima y dando diferentes reacciones secundarias como son la polimerización del dador o la elongación del producto, solamente si el dador presenta un grupo glucosilo en el extremo no reductor.
Se evalúa una librería de xilogluco-oligosacáridos sintetizada por el equipo del Dr. Driguez en el CERMAV-CNRS como dadores de la Ptt-XET16A. De esta forma se profundiza en el conocimiento de la actividad de las XTHs, en el conocimiento de su especificidad por sustrato y se realiza un mapeo del centro activo del enzima, obteniéndose la contribución de los diferentes subsitios de la Ptt-XET16A en la estabilización del estado de transición de la reacción de transglicosidación catalizada por el enzima estudiado.
Finalmente, se ha diseñado un sustrato bifuorogénico derivado del tetradecasacárido utilizado como sustrato estándar en el presente trabajo para medir las actividades hidrolasa y transglicosilasa de las XETs mediante fluorescence resonance energy transfer (FRET). El sustrato biofluorogénico ha sido obtenido y caracterizado, sin embargo no se ha podido demostrar si este sustrato es adecuado para medir las actividades hidrolasa y transglicosilasas de las XETs, ya que las propiedades fluorescentes del marcador se han perdido durante la síntesis del sustrato.
The present work is part of an European project named E.D.E.N. (Enzyme Discovery in hybrid aspen for fibre ENgineering, QLK5-CT-2001-00443). The general objective of the project is to identify novel plant enzymes for deeper understanding of the process of fiber formation and modification for future improvement of the quality parameters of wood fibers. The present project pretends to increase the knowledge about xyloglucan endotransglycosylases (XET), which are thought to be key enzymes in the construction and controlled modification of the xyloglucan¬cellulose network. It is pretended to study the mechanism of action and the substrate specificity of a XET from Populus tremula x tremuloides, concretely XET16A (Ptt-XET16A).
A new enzymatic assay based on capillary electrophoresis is designed and validated. This assay allows the kinetic study of XETs using as substrates, low molecular mass xyloglucan oligosaccharides with defined structures. These substrates have been synthesized in the present work and also in collaboration with Dr. Driguez team from CERMAV-CNRS.
It is concluded that the maximum of activity of Ptt-XET16A is between pH 5 and 5.5 and 30 and 40 ºC. It is demonstrated that Ptt-XET16A follows a bi-bi ping-pong kinetic mechanism, in which the acceptor acts as competitive inhibitor of the donor binding to the free enzyme and depending on the donor used, this one can act also as competitive inhibitor of the acceptor binding to the acceptor subsites of the glycosyl-enzyme intermediate giving rise to side reaction such as donor polymerization and product elongation only in case that the donor shows a glucosyl residue in the non reducing end.
A library of xylogluco-oligosaccharides, synthesized in CERMAV-CNRS by Dr. Driguez team, is evaluated as Ptt-XET16A donors. With this studies we are able to deeper understand the activity of XETs, their substrate specificity and a subsite maping of the binding cleft is done, obtaining the contribution of different subsites of Ptt-XET16A to the stabilization of the transition state of the transglycosylation reaction catalyzed by the studied enzyme.
Finally, a bifluorogenic substrate derived from the tetradecasacharide used as standard substrate in this project has been designed to measure hydrolase and transferase activities of XET enzymes by fluorescense resonance energy transfer (FRET). The bifluorogenic substrate was obtained, however, it could not be demonstrated if it is an adequate substrate to measure hydrolase and transferase activities because the fluorescent properties of the label were lost during substrate synthesis.
Ploux, Sylvain. "Caractérisation et traitement du substrat électrique pour la thérapie de resynchronisation cardiaque." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0180/document.
Повний текст джерелаWe aimed to characterize the electrical substrate amenable to biventricular pacing (BVP) and to assess the actual value of electrical resynchronization. We showed, both with respect to surface ECG and detailed ventricular electrocardiographic mapping (ECM), a strong relationship between the baseline electrical dyssnchrony and the hemodynamic response to BIV pacing. Compared with standard ECG, ECM allows a more detailed analysis of the ventricular dyssynchrony and better predicts clinical outcomes after BVP. A minimal amount of electrical dyssynchrony, in particular a sufficient LV activation delay relative to right ventricular activation, is a prerequisite to the hemodynamic response to BVP. Due to their advanced electrical dyssynchrony, patients with left bundle branch block present potential for BVP positive response which acts by electrical resynchronization. Conversely, BVP worsens the electrical activation (iatrogenic dyssynchrony) and hemodynamics in patients with narrow QRS suffering from insufficient electrical dyssynchrony at baseline. Patients with unspecified conduction disorders show variable levels of electrical dyssynchrony and as a consequence mixed results to BVP. Similarly, ECM reveals a variable degree of left ventricular activation delay in patients chronically paced in the right ventricle. Beside the electrical resynchronization, other mechanisms are involved in the cardiac pump function improvement such as the redistribution of the mechanical work over the right and left ventricles. Through ventricular interaction, the RV myocardium importantly contributes to the improvement in LV pump function induced by single site LV pacing
Ferguson, Sean. "Hydraulic Geometry and Fish Habitat in Semi-Alluvial Bedrock Controlled Rivers." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35313.
Повний текст джерелаValle, Arthur. "Da revolução do gás não convencional nos EUA tendo como substrato uma interferência governamental persistente no estímulo a atividade econômica e no fomento as inovações tecnológicas afetas ao setor." reponame:Repositório Institucional do FGV, 2014. http://hdl.handle.net/10438/11599.
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O presente estudo versa sobre os fatores tecnológicos e ambientais que vêm resultando no crescimento da produção de gás natural não convencional nos EUA. Os objetos de analise principais serão as políticas públicas, assim como a dinâmica entre os atores sociais e o ambiente propício que fora criado para que houvesse o adensamento do fomento e do estímulo às inovações tecnológicas sucedidas no setor.
The present study deals with the technological and environmental factors that have resulted in increased of production of unconventional natural gas in the U.S.. The objects of analysis will be the public policies, as well as the dynamics between social actors and enabling environment which was created to promote and the encourage the successful technological innovations in the industry.
Arvanitogiannis, Andreas. "Mapping the substrate for brain stimulation reward : new approaches to an old problem." Thesis, 1997. http://spectrum.library.concordia.ca/401/1/NQ40304.pdf.
Повний текст джерелаRogers, Joshua S. "Comparison of underwater video mapping and pebble count measurements in determining stream channel substrate." 2008. http://etd.utk.edu/August2008MastersTheses/RogersJoshuaS.pdf.
Повний текст джерелаForgie, Margaret L. "Mapping the substrate for brain stimulation reward by means of current-number trade-off functions." Thesis, 1989. http://spectrum.library.concordia.ca/3633/1/ML51347.pdf.
Повний текст джерелаNayyar, Sachin. "High density mapping of ventricular scar: insights into mechanisms of ventricular tachycardia." Thesis, 2014. http://hdl.handle.net/2440/93913.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, School of Medicine, 2014
Huang, Wei-Chia, and 黃帷珈. "The Use of Value Stream Mapping for the Improvement of Make-To-Order Production Process – A Case Study of Patterned Sapphire Substrate Company." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/4wdu7f.
Повний текст джерела元智大學
工業工程與管理學系
105
Lean Production emphasizes customer value orientation while conducting a series of improvement activities on production or operation processes in order to transcend the service quality requirements beyond customer expectations, to improve business productivity and increase industrial competitiveness. Value Stream Mapping reflects the overall operating process of the current situation and is widely used in various industries of production, operations, service processes. In Make-To-Order production environment, companies must have superior productivity, timely response to the demand of market, in order to stand out from the competitive market. The study assists the case company to solve the current problem at low cost and suggests the direction of improvement. It provides the company with the reference for initial improvement so as to realize the possibility of productivity enhancement. In this study, Value Stream Mapping analysis is applied to the case-by-case production process, and the seven criteria of value flow are used to re-integrate the production process. The results of the study indicated that the company's total lead time can be improved by 96.68%, processing time by 12.80%, the annual personnel costs can be reduced by NT $ 1.92 million. A significant gap was also shown between the improved process cycle efficiency of 87.65% and the original 3.33%. Although the estimated improvement serves as a reference, Value Stream Mapping analysis can undoubtedly improve productive. Keywords:Lean Production, Value Stream Mapping, Make-To-Order production.
Fingrová, Zdeňka. "Využití neinvazivních zobrazovacích metod pro přesné hodnocení velikosti srdečních síní a predikci fibrotizace jejich stěn u nemocných s fibrilací síní." Doctoral thesis, 2019. http://www.nusl.cz/ntk/nusl-408820.
Повний текст джерелаRaad, Nour. "NaV1.5 Modulation: From Ionic Channels to Cardiac Conduction and Substrate Heterogeneity." Doctoral thesis, 2014. http://hdl.handle.net/11858/00-1735-0000-0022-5E72-F.
Повний текст джерелаCallicott, Ralph J. "Characterization and Mapping of the Gene Conferring Resistance to Rift Valley Fever Virus Hepatic Disease in WF.LEW Rats." 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-196.
Повний текст джерела