Dissertations / Theses: 'Diagnostické parametry'

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Bencalík, Karol. "Diagnostika hydraulických soustav letadel." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-234202.

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In aviation, great emphasis is placed on aircraft safety. The current technical condition of the aircraft and its systems is an important parameter for its airworthiness. The technical condition of the elements measured during the flight should be compared to parameters specified by the manufacturer and measured in laboratory conditions. This thesis deal with the possibilities of the use of dimensionless numbers for the diagnostics of the hydrogenerator and deals with the diagnostics possibilities of selected elements.

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Harasim, Tomáš. "Návrh diagnostické soustavy pro malý dopravní letoun." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231664.

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Due to the airliners and aircraft operators pressure on reducing the operating costs, the diagnostic systems are included in aircraft, so that the wearness of single functional elements of other functional systems can be monitored. This monitoring can save money, that are usually spent on maintenance and especially, it leads to an increase of the overall safety of aircraft operations. The task of this work is to design a diagnostic system for small transport aircraft. For the right and proper design, is the correct understanding of the functions of each part on aircraft systems needed. The part of this work is attended to the selection procedure of appropriate diagnostic parameters, next section deals with the suitable options of their scanning. I do mention the summary of the chosen diagnostic parameters for the scanning and the recomended ways of their measuring.

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Špatenka, Jan. "Palubní počítač s testovací jednotkou pro osobní automobily." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219838.

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This thesis deals with the design and implementation of on-board computer unit with testing for cars. The first part focuses on circuit design concepts. Measurement data acquisition module uses standard OBD2. The module is designed based on the measuring circuit STN1110. Measuring module equipped with USB and JTAG communicates with the nearby devices. The control module is equipped with ARM microcontroller. The second part deals with the implementation of software for the microcontroller and the PC application. Finally, test results of the on-board computer implemented are presented.

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Benešl, Lukáš. "Vliv fyzických parametrů a stáří silnoproudého vedení na výkonnost a spolehlivost PLC/BPL." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413002.

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BPL technology is quite widespread nowadays and the public is also somewhat aware of it. This technology can be used as a means of communication without the need to install additional media and thus use the existing infrastructure. In an effort to use the full potential of the technology, BPL communication began to be used to monitor the current state of cables in distribution networks online. Where the technology is already fully implemented, the distributor can use the data to evaluate the current situation. In this way, BPL technology can be used as a diagnostic tool to test the quality of a cable connection on which not only time but also humidity and other external influences could have a significant effect.

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Schreier, Jan. "Vliv parametrů vazebného média a struktury povrchu na kvalitu snímaného signálu akustické emise." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230124.

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This master’s thesis deals with the influence of different AE sensor couplants and surface roughness on the selected acoustic emission parameters. There are compared the amplitude of the signal measured using five different couplants at 20°C and 80°C. To monitor the effect of surface roughness on the AE parameters simple measuring product was constructed. Its functionality has been verified by implementation of basic experimental measurements.

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Nearing, Grey Stephen. "Diagnostics and Generalizations for Parametric State Estimation." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/293533.

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This dissertation is comprised of a collection of five distinct research projects which apply, evaluate and extend common methods for land surface data assimilation. The introduction of novel diagnostics and extensions of existing algorithms is motivated by an example, related to estimating agricultural productivity, of failed application of current methods. We subsequently develop methods, based on Shannon's theory of communication, to quantify the contributions from all possible factors to the residual uncertainty in state estimates after data assimilation, and to measure the amount of information contained in observations which is lost due to erroneous assumptions in the assimilation algorithm. Additionally, we discuss an appropriate interpretation of Shannon information which allows us to measure the amount of information contained in a model, and use this interpretation to measure the amount of information introduced during data assimilation-based system identification. Finally, we propose a generalization of the ensemble Kalman filter designed to alleviate one of the primary assumptions - that the observation function is linear.

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Silva, Leopoldo Magacho dos Santos. "Avaliação de parametros estruturais no diagnostico do glaucoma." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/310035.

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Orientadores: Vital Paulino Costa, Ana Maria Marcondes
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas
Made available in DSpace on 2018-08-04T01:23:28Z (GMT). No. of bitstreams: 1 Silva_LeopoldoMagachodosSantos_D.pdf: 1066525 bytes, checksum: d1d302bd6421f23d5f4e474e23049056 (MD5) Previous issue date: 2004
Resumo: Objetivo: Avaliar a Sensibilidade e Especificidade de parâmetros estruturais (topografia de disco óptico e análise da camada de fibras nervosas da retina) no diagnóstico do glaucoma. Métodos: Pacientes com glaucoma primário de ângulo aberto foram selecionados do ambulatório de glaucoma da Unicamp. Indivíduos normais foram recrutados junto a voluntários dentro da equipe médica, amigos e parentes dos pacientes. Os participantes, após aprovação do Comitê de Ética da instituição, foram submetidos a exame oftalmológico completo, campimetria computadorizada (Humphrey Full Threshold, programa 24-2), topografia de disco óptico com o TOPSS e análise da camada de fibras nervosas da retina por meio da polarimetria de varredura a laser (GDx, versão 1.0.12). Curvas ROC foram criadas para se estabelecer novos pontos de corte para cada parâmetro individual de ambos os instrumentos. Em seguida, a análise de regressão multivariada foi empregada com parâmetros da topografia de disco óptico e polarimetria de varredura a laser separados e em conjunto para obter uma melhor relação sensibilidade/especificidade (Se/Es) no diagnóstico do glaucoma. Resultados: Cento e doze indivíduos com glaucoma e 88 normais foram incluídos. Os parâmetros individuais da polarimetria de varredura a laser com melhor capacidade em diferenciar olhos normais de glaucomatosos foram: The Number (Se: 79,5%, Es: 81,8%, área abaixo da curva ROC - aROC: 0,870), Maximum Modulation (Se: 83,0%, Es: 76,1%, aROC: 0,842) e Ellipse Modulation (Se: 65,2%, Es: 88,6%, aROC: 0,831), enquanto Average Disc Diameter (Se: 64%, Sp: 89%, aROC: 0.824), Total Disc Area (Se: 85%, Sp: 66%, aROC: 0.802) e Cup Area (Se: 69%, Sp: 85%, aROC: 0.797) foram os melhores parâmetros individuais da topografia de disco óptico. Entretanto, a análise discriminante apresentou melhores resultados que os parâmetros individuais, tanto para a polarimetria de varredura a laser (Se: 87,5%, Es: 86,4%, aROC: 0,900), topografia de disco óptico (Se: 90%, Sp: 81%, aROC: 0,910), quanto para a combinação de parâmetros derivados de ambos os instrumentos (Se: 93%, Es: 91%, aROC: 0,970). Conclusão: Parâmetros estruturais, avaliados pela topografia de disco óptico e pela polarimetria de varredura a laser apresentam boa capacidade na diferenciação entre olhos normais e glaucomatosos. Entretanto, os melhores resultados são obtidos ao combiná-los em uma função linear discriminante com parâmetros derivados de ambos os instrumentos
Abstract: Purpose: To test the ability of structural parameters (as measured by the Scanning Laser Polarimetry and Confocal Scanning Laser Ophthalmoscopy) to discriminate between normal and glaucomatous eyes. Methods: After approval of the Ethics Committee of the University of Campinas, primary open-angle glaucoma patients were selected from the glaucoma service. Normal individuals were recruited from volunteers among the medical staff, university members, family and friends of patients. All individuals underwent a thorough ophthalmic evaluation, a 24-2 full threshold Humphrey visual field, Scanning Laser Polarimetry with the GDx and Confocal Scanning Laser Ophthalmoscopy with the TOPSS. Cut-off points were selected and ROC curves were created for each individual Confocal Scanning Laser Ophthalmoscopy and Scanning Laser Polarimetry parameters. Finally, multivariate discriminant formulas were developed in order to achieve a better sensitivity (Se)/specificity (Sp) ratio for the diagnosis of glaucoma, initially separately for each device, and then combining parameters from Confocal Scanning Laser Ophthalmoscopy and Scanning Laser Polarimetry. Results: One-hundred and twelve patients with primary open-angle glaucoma and 88 normal individuals were enrolled in the study. The best Scanning Laser Polarimetry parameters in differentiating normal individuals from glaucoma patients were: The Number (Se: 79,5%, Es: 81,8%, area under the ROC curve- aROC: 0,870), Maximum Modulation (Se: 83,0%, Es: 76,1%, aROC: 0,842) and Ellipse Modulation (Se: 65,2%, Es: 88,6%, aROC: 0,831), while the best Confocal Scanning Laser Ophthalmoscopy individual parameters were: Average Disc Diameter (Se: 64%, Sp: 89%, aROC: 0,824), Total Disc Area (Se: 85%, Sp: 66%, aROC: 0,802) and Cup Area (Se: 69%, Sp: 85%, aROC: 0,797). However, the multivariate analysis resulted in better results for the Scanning Laser Polarimetry (Se: 87,5%, Es: 86,4%, aROC: 0,900), Confocal Scanning Laser Ophthalmoscopy (Se: 90%, Sp: 81%, aROC: 0,910), and for the combination of parameters from both devices (Se: 93%, Es: 91%, aROC: 0,970). Conclusion: Structural parameters, as measured by the Confocal Scanning Laser Ophthalmoscopy and Scanning Laser Polarimetry have good ability to differentiate normal individuals from glaucoma patients. However, better results are obtained combining parameters from both devices in a multivariate discriminant formula
Doutorado
Oftalmologia
Doutor em Ciências Médicas

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Lange, Yvonne. "Serologische Parameter in der Diagnostik der Post-ERCP-Pankreatitis." Doctoral thesis, Universitätsbibliothek Leipzig, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-64686.

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Azadan, Niaz. "Den diagnostiska säkerheten i arbetsprov på kvinnor med angina pectoris : Slutversion." Thesis, Hälsohögskolan, Jönköping University, HHJ, Avd. för naturvetenskap och biomedicin, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-49238.

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Angina pectoris är bröstsmärta orsakat av myokardischemi, till följd av kranskärlsjukdom med eller utan stenoser eller icke kranskärlsjukdom. Arbetsprov är den vanligaste undersökningen för angina pectoris. Diffusa symtom och angina pectoris varianter utan stenoser med låg sensitivitet för elektrokardiografi (EKG) sänker den diagnostiska säkerheten i arbetsprov på kvinnor. Litteraturstudiens syfte var att utreda om hemodynamiska parametrar och riskbedömning med Pre-test sannolikhet (PTP) samt Dukes Löpbands Index (DTS, Dukes Treadmill Score) kan öka den diagnostiska säkerheten i arbetsprov på kvinnor. Inklusionskriterierna var vetenskapligt granskade kliniska studier på engelska, med information om etiskt godkännande eller samtycke. Snowballing metoden, PUBMED, MEDLINE och CINAHL användes. Studier som inkluderades i resultatet granskades återigen och jämfördes med varandra. Hemodynamiska parametrar, PTP och DTS ökar den diagnostiska säkerheten i arbetsprov på kvinnor. Denna diagnostiska säkerhet beror dock också på PTP metod, PTP riskgrupp, etnicitet och angina pectoris variant. Vidare forskning behövs om etnicitetspecifika PTP metoder, mekanismen bakom blodtrycksreaktionen, DTS på icke kranskärlsjukdomar samt metoder som kan skilja mellan olika icke kranskärlsjukdomar. Utan studier om Systematic COronary Risk Evaluation (SCORE) och Diamond Forrester Score (DFS) samt deras påverkan på arbetsprov, kan inte resultatet i litteraturstudien generaliseras till arbetsprov i Sverige.
Angina pectoris is chest pain and myocardial ischemia due to Coronary Artery Disease (CAD) or Non-Coronary Artery Disease (non-CAD). Exercise stress test (EST) is the most common diagnostic procedure for angina pectoris. Non-CAD, low sensitivity for exercise electrocardiography (ex-ECG) and diffuse symptoms lower the diagnostic accuracy for females. This review’s aim was to study whether haemodynamic parameters and risk stratifications with Pre-test probability (PTP) or Duke Treadmill Score (DTS) improves the diagnostic accuracy of EST for females. Inclusion criterions were English peer reviewed, clinical studies with mentioned ethical approval or consent. Snowballing, PUBMED, MEDLINE and CINAHL were used. Articles that were included in the results, were reviewed once again, and compared to one another. Hemodynamic parameters, PTP and DTS increase the diagnostic accuracy of EST in women. This diagnostic accuracy depends on PTP method, risk group, ethnicity, and angina pectoris variant. Further research regarding ethnic specific PTP methods, mechanism behind the blood pressure reaction, DTS for diagnosis of non-CAD and methods for differentiation of subtypes of non-CAD, would be valuable. Without studies about the Systematic Coronary Risk Evaluation (SCORE), Diamond Forrester Score (DFS), and their impact on ex-ECG, the result of this review cannot be generalized to ex-ECG in Sweden.

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Bai, Xueshi. "Laser-induced plasma as a function of the laser parameters and the ambient gas." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10333/document.

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La technique laser-induced breakdown spectroscopy (LIBS), qui consiste à exploiter le spectre du plasma induit par laser sur la surface de l'échantillon pour déterminer sa composition élémentaire, a été inventée il y a plus de 50 ans. Récemment, elle connaît un développement rapide, poussée par des besoins d'application dans différents domaines, citons par exemple, exploration océanique, détection de pollution environnementale, ou contrôle de procédés industriels. Cette technique utilise le plasma généré par ablation laser comme la source spectroscopique. La particularité de LIBS est que le plasma induit par laser présente un comportement transitoire et une distribution spatiale qui ne soit pas uniforme en général. Bien que la détection résolue en temps puisse améliorer considérablement la performance de LIBS, surtout pour le procédé de LIBS autocalibration avec une meilleure détermination de température, l'évolution temporelle du plasma est souvent corrélée avec sa morphologie et son inhomogénéité spatiale. L'étude de la morphologie ainsi que la structure interne du plasma avec l'évolution pendant l'expansion de celui-ci dans un gaz ambiant, représente donc un point crucial pour l'optimisation du plasma entant qu'une source spectroscopique. Suite à la thèse de Qianli Ma réalisée dans notre équipe et soutenue en décembre 2012, qui a été notamment consacrée à l'étude de l'effet de la longueur d'onde du laser d'ablation sur les propriétés et l'évolution du plasma dans un gaz ambiant d'argon, la présente thèse s'intéresse aux effets des autres paramètres, la fluence du laser d'ablation, la durée de l'impulsion, et les différents gaz ambiants (argon ou air), sur la morphologie et la structure du plasma. Par ailleurs, les mécanismes microscopiques conduisant à l'onde de détonation soutenue par laser dans argon ou dans l'air sont aussi étudiés. Lors du refroidissant du plasma dans l'air, des oxydes métalliques peuvent se former. L'étude de la formation de molécules, au-delà de l'intérêt pratique pour la LIBS, fournit également un aperçu de la cinétique chimique dans le plasma, ce qui est intéressant pour l'étude de la transformation du plasma en phase gazeuse à une phase recondensée de nanoparticules
Laser-induced breakdown spectroscopy (LIBS) has been invented for more than 50 years, which analyzes the spectrum of the laser-induced plasma to determine the elemental composition of the ablated sample. Recently, LIBS technique has been well developed and applied in different domains, for example oceanic exploration, pollution monitoring in the environment. LIBS uses the ablation plasma as a light source that contains the elemental composition information of the sample. However, the laser-induced plasma exhibits a transient behavior. Although time-resolved and gated detection can greatly improve the performance of the LIBS technique especially that of calibration-free LIBS (CF-LIBS) with a better determination of plasma temperature, the temporal evolution of the plasma is correlated to its morphology and its spatial inhomogeneity. The determination of the morphology as well as the internal structure of the plasma together with their evolution during plasma expansion into the ambient gas is therefore crucial for the optimization of the use of ablation plasma as a spectroscopic emission source. Evolutions of the morphology and the internal structure of the ablation plasma are considered as the consequence of its hydrodynamic expansion into the ambient gas. Following the thesis of Qianli Ma which has studied the effect of laser wavelength on the behavior of the plasma induced in an ambient gas of argon, the present thesis has used the same diagnostic techniques (time- and space-resolved emission spectroscopy and fast spectroscopic images) together with 1064 nm ns laser pulse ablation of a target of aluminum to investigate the effects of other parameters, such as the fluence and the duration of laser pulse, the effect of different ambient gases (argon and air), on the morphology and internal structure of the plasma. Furthermore, in order to understand the effects of these parameters on the properties of the plasma, the microscopic mechanisms during post ablation and the propagation of the plasma are also studied. While the plasma cools down in air, molecules are formed, AlO for instance. So the thesis also studied the condition for the formation of the molecules in the plasma. Beyond the practical interest of this study for LIBS, it provides also insights to the kinetics of the AlO molecule formation in laserinduced plasma

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Albertson, Philip. "WBD – Web Based Diagnostics : Identifierande av parametrar på CAN-bussen." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1720.

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Denna rapport beskriver ett examensarbete för högskoleingenjörsexamen i datorteknik vid Växjö universitet, utfört av Philip Albertson. Vid företaget BSR i Växjö pågår utvecklingen av en ny teknik benämnd Web Based Diagnostics. Målet med projektet är att göra fordonsdiagnostik tillgängligt för bilägare till ett bra pris. Systemet består av tre delar; en modul som sätts i bilen, en server som hanterar informationen och en klient för att kunden ska kunna nå informationen. Min del i detta projekt var att identifiera hur sökta parametrar nås på CAN-bussen i bilar från VAG (Volkswagen Auto Group) och Saab. Företagets representanter var nöjda med resultatet då det utgör en bra grund för vidareutvecklingen av den prototyp för modulen som utvecklats av EDAB (Elektronik Design AB) i Sundsvall.

This abstract describes the bachelor degree thesis in computer technology at Växjö University written by Philip Albertson during the spring term of 2007. At the company BSR in Växjö, Sweden there is a new project under development called WBD – Web based diagnostics. The aim of the project is to make car diagnostics available to ordinary people at a decent cost. The system consists of three parts; a module to plug in the car, a server to handle the information and a client to allow the customers to reach the information about their car. My part in this project was to specify how to reach certain parameters on the CAN-bus in cars from VAG (Volkswagen Auto Group) and Saab. The company was satisfied with the results since they provided a good basis to further develop the module prototype built by the company EDAB (Elektronik Design AB) in Sundsvall, Sweden.

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Sandink, Christopher Albert. "Screening diagnostics for parameter selection in extended Kalman filter implementations." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0006/MQ45297.pdf.

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Konala, Bhaskar Chandra. "Effect of Arterial Wall-Stenosis Compliance on Coronary Diagnostic Parameters." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1291146768.

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Holušová, Kateřina. "Standardizace a harmonizace znalecké metodiky pro potřeby Forenzní ekotechniky: les a dřeviny." Doctoral thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-234301.

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In the presented thesis is an overview of the current state solved the problem, specifying the inclusion of Forensic Ecotechnique: forest and trees into the forensic sciences in the world and its description as part of special methods of forensic engineering. The results focus on the design of standardized and harmonized processes according to the type of expert opinions. As another of the key results of the work are designed functional biometric parameters for evaluating trees in the functional diagnosis of Methods of contact flora assessment (“CFA”). Application of some methods of measurement and selected functional biometric parameters are listed in the examples in the measurement of selected forest stands of beech in the National Nature Reserve Voděradské bučiny and in Chřiby hills. As a general supplement usable in Forensic ecotechnique: forest and trees are given the limits for functional diagnostics. In another series of work includes a discussion on the proposed standards and the measurement results. The work is concluded by summarizing the results and the benefits.

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Nedanovska, E. N. "Thomson scattering from technological plasmas." Thesis, Queen's University Belfast, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580125.

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Holeš, David. "Vizualizace a on-line kontrola důležitých parametrů blokových a odbočkových transformátorů jaderné elektrárny Dukovany." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413207.

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The thesis focuses on a design of visualization and setting limits of important parametres of power and own-consumption transformers at the nuclear power plant Dukovany. In the first part there is a description of a present technical state of oil power transformers at this power plant, including a description of a currently installed transformers monitoring system and electro monitoring system. The second part deals with a design of a visialization of parametrs and a diagram design of active-access displays of monitored parametrs of these transformers. In the thesis there is also a description of web interface with a new visualization. The last part of the thesis contains a design of setting the limits and criteria of important monitoring parametres of these transformers.

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Angalev, Mikhail. "Energy saving at gas compressor stations through the use of parametric diagnostics." Thesis, KTH, Energiteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101061.

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Increasingly growing consumption of natural gas all around the world requires development of new transporting equipment and optimization of existing pipelines and gas pumping facilities. As a special case, Russian gas pumping system has the longest pipes with large diameter, which carry great amounts of natural gas. So, as reconstruction and modernization needs large investments, a need of more effective and low cost tool appeared. As a result diagnostics became the most wide-spread method for lifecycle assessment, and lifecycle extension for gas pumping units and pipelines.One of the most effective method for diagnostics of gas pumping units is parametric diagnostics. It is based on evaluation of measurement of several termo-gas dynamic parameters of gas pumping units, such as pressures, temperatures and rotational speed of turbines and compressors.In my work I developed and examined a special case of parametric diagnostics – methodic for evaluation of technical state and output parameters for gas pumping unit “Ural-16”. My work contains detailed analysis of various defects, classified by different GPU’s systems. The results of this analysis are later used in development of the methodic for calculation of output parameters for gas pumping unit.GPU is an extremely complex object for diagnostics. Around 200 combinations of Gas Turbine engines with centrifugal superchargers, different operational conditions and other aspects require development of separate methodic almost for each gas pumping unit type.Development of each methodic is a complex work which requires gathering of all possible parametric and statistical data for the examined gas pumping unit. Also parameters of compressed gas are measured. Thus as a result a number of equations are formed which finally allow to calculate such parameters as efficiency, fuel gas consumption and technical state coefficient which couldn’t be measured directly by existing measuring equipment installed on the gas compressor station.

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Chamuleau, Steven Anton Jozef. "Intracoronary derived physiological parameters for clinical decision-making in patients with multi-vessel coronary artery disease." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2001. http://dare.uva.nl/document/85068.

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Fendrych, Martin. "Studium vlivu parametrů na pohyb elektrodových skvrn v modelu zhášecí komory elektrického přístroje." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242114.

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Thesis focuses on the basic characteristics of plasma, problems about origin of electrode spots and electrodynamics force acts on the electric arc. In the practical part was realized and produced model of a LV quenching system. Using optical diagnostics was received necessary data to analyze the movement of the electrode spots. The movements of the electrode spots were analyzed in terms of value RMS current passing through the electric arc, value of absolute pressure model in the LV quenching system and distance from each electrode.

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Goswami, Ishan. "Influence of geometric and flow variations on coronary diagnostic parameters: An in-vitro study." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1367937429.

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Lu, Ying 1968. "Bayesian estimation of diagnostic test parameters in the presence of verification bias." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=98755.

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The statistical evaluation of diagnostic tests may be affected by several potential biases. These biases include those caused by a study design that results in a non-representative sub-sample who are further verified by the reference test (verification bias), and those caused by the absence of a definitive diagnostic test (gold standard test) for many diseases and conditions. In practice, an imperfect reference test is often assumed to be a perfect gold standard, potentially resulting in a large bias. Both Bayesian and frequentist methods have been proposed to adjust for each of these biases independently. To our knowledge, there is no Bayesian solution for that adjusts for both of these biases simultaneously. The objective of this thesis is to present a Bayesian method for the evaluation of diagnostic tests when both of these potential biases may be operating simultaneously. We develop a likelihood function that models both sources of bias, and suggest convenient prior distributions that simplify deriving posterior distributions. The models are based on dichotomous test results and the parameters of interest are estimated using a Gibbs sampler. Using both simulated and real data examples, we demonstrate that the method presented here can correct the verification bias even when a perfect gold standard test does not exist.

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Schostak, Martin Jürgen Wolfgang [Verfasser]. "Neue Parameter in der molekularen Diagnostik des Prostatakarzinoms / Martin Jürgen Wolfgang Schostak." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2007. http://d-nb.info/1022577883/34.

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Peelukhana, Srikara Vishwanath. "Effect of coronary collateral flow on diagnostic parameters: An In vitro study." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1258473630.

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Ratushna, Vladyslava G. "Incorporation of Physico-Chemical Parameters Into Design of Microarray Experiments." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32989.

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Microarrays containing long oligonucleotides provide sensitive and specific detection of gene expression and are becoming a popular experimental platform. In the process of designing an oligonucleotide microarray for Brucella, we optimized the overall design of the array and created probes to distinguish among the known Brucella species. A 3-way genome comparison identified a set of genes which occur uniquely in only one or two of the sequenced Brucella genomes. Reverse transcriptase PCR assays of over one hundred unique and pairwise-differential regions identified in Brucella revealed several groups of genes that are transcribed in vivo with potential significance for virulence. The structural and thermodynamic properties of a set of 70mer oligonucleotide probes for a combined B. abortus, B. melitensis and B. suis microarray were modeled to help perform quantitative interpretation of the microarray data. Prediction and thermodynamic analysis of secondary structure formation in a genome-wide set of transcripts from Brucella suis 1330 demonstrated that properties of the target molecule have the potential to strongly influence the rate and extent of hybridization between transcript and an oligonucleotide probe in a microarray experiment. Despite relatively high hybridization temperatures used in the modeling process, parts of the target molecules are predicted to be inaccessible to intermolecular hybridization due to the formation of stable intramolecular secondary structure. Features in the Brucella genomes with potential diagnostic use were identified, and the extent to which target secondary structure, a molecular property which is not considered in the array design process, may influence the quality of results was characterized.
Master of Science

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25

Zanten, Anton Pieter van. "Central nervous system metastases from extracranial malignancies diagnostic value of clinical chemical parameters /." Amsterdam : Maastricht : Rodopi ; University Library, Maastricht University [Host], 1986. http://arno.unimaas.nl/show.cgi?fid=5309.

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Browne, R. Edwin. "An evaluation of 'Coast Down Time' as a diagnostic parameter for condition monitoring." Thesis, Glasgow Caledonian University, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486489.

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The behaviour of rotating machinery during deceleration when the power of the drive to the rotating machinery is stopped is known as Coast Down Phenomenon (CDP). The total time elapsed for the entire momentum due to sustained operation of the rotating machinery to dissipate is known as Coast Down Time (CDT). The characteristic profile of CDT (CDT-P) depends on inertia forces of the machinery components, tribological behaviour and environmental effects such as fluid drag. The aim of the research is to investigate the potential and the feasibiJity of using CDT as an effective tool for condition monitoring of machinery. A review of current literature has given a clear understanding to what extent the CDP has been explored with respect to utilising it as a diagnostic parameter. However no evidence for effective use of CDT in condition based monitoring programmes can be found. The main focus of this research is concentrated on ascertaining the validity of Coast Down Time as one of the condition monitoring parameters for a horizontal rotor system. Extensive experimental analysis is conducted on a rotor system consisting of a journal bearing using different lubricants under various mechanical and operating conditions An empirical formula is developed to determine the Coast Down Factor (CDF). Furthermore, the effect of rub on the motor has been studied with the aid of an electromagnetic clutch and isolating the rotor from the drive system. This research has shown a novel way to interpret the CDT-P to be used as a diagnostic parameter in condition monitoring by the formulation of Coast Down Factor. CDF gives a simple, but highly flexible tool for CDT analysis. COT monitoring through the trend of CDF can be used to analyse the performance of a journal bearing under given tribological conditions; to utilise as a tool for optimisation of selection of lubrication oil; to evaluate and understand. the tribological behaviour of lubrication and the performance of a journal bearing under different oil pressures; and to diagnose the mechanical degradation with simulated unbalance to the rotor system.

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27

Roesler, Vreni Helen [Verfasser]. "Bedeutung diagnostischer Parameter in der Diagnostik funktioneller Bauchschmerzen im Kindesalter / Vreni Helen Roesler." Ulm : Universität Ulm, 2019. http://d-nb.info/1200469879/34.

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Subramony, Anantha Krishna. "Efficacy of New Diagnostic Parameters for Determining Arteriovenous Fistula Functionality: A Numerical Study." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470753788.

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29

Albrecht, Ulrike. "Reizreaktion und Verlangen bei pathologischen Glücksspielern: psychologische und physiologische Parameter." Berlin Logos-Verl, 2006. http://deposit.ddb.de/cgi-bin/dokserv?id=2820882&prov=M&dok_var=1&dok_ext=htm.

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Marcicki, James Matthew. "Modeling, Parametrization, and Diagnostics for Lithium-Ion Batteries with Automotive Applications." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1354652448.

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Jiang, Naibo. "Development of high repetition rate no planar laser induced fluorescence imaging." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1150140816.

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32

Hudert, Tanja. "Sonographische, echokardiographische und labordiagnostische Parameter bei gesunden euthyreoten Katzen und hyperthyreoten Katzen sowie bei Katzen mit nichtthyreoidalen Krankheiten." Diss., München Verl. Dr. Hut, 2008. http://d-nb.info/990775178/04.

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33

Flitter, Helmut. "Entwicklung einer computergestützten Kurzform des Gedächtnis für Personen-Tests unter Berücksichtigung quantitativer und qualitativer Parameter der Gedächtnisleistung." Dresden TUDpress, 2005. http://deposit.d-nb.de/cgi-bin/dokserv?id=3058479&prov=M&dok_var=1&dok_ext=htm.

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34

Moczko, Ewa. "New approach in multipurpose optical diagnostics : fluorescence based assay for simultaneous determination of physicochemical parameters." Thesis, Cranfield University, 2009. http://dspace.lib.cranfield.ac.uk/handle/1826/4573.

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The development of sensors assays for comprehensive characterisation of biological samples and effective minimal-invasive diagnostics is highly prioritised. Last decade this research area has been actively developing due to possibility of simultaneous, real- time, in vivo detection and monitoring of diverse physicochemical parameters and analytes. The new approach which has been introduced in this thesis was to develop and examine an optical diagnostic assay consisting of a mixture of environmental-sensitive fluorescent dyes. The operating principle of the system has been inspired by electronic nose and tongue devices which combine nonspecific (or semispecific) sensing elements and chemometric techniques for multivariate data analysis. The performance of the optical assay was based on the analysis of the spectrum of selected dyes with discreet reading of their emission maxima. The variations in peaks intensities caused by environmental changes provided distinctive fluorescence patterns, which could be handled similar to the signals collected from nose/tongue devices. The analytical capability of the assay was engendered by changes in fluorescence signal of the dye mixture in response to changes in pH, temperature, ionic strength and the presence of oxygen. Further findings have also proved the ability of optical assay to estimate development phases and to discriminate between different strains of growing cell cultures as well as identify various gastrointestinal diseases in human. This novel fluorescence-based diagnostic tool offers a promising alternative to electrochemical systems providing high sensitive measurements with broad dynamic range, easy, inexpensive measurements and the possibility of remote sensing and extreme assay miniaturisation. Additionally it does not require reference signal. This new approach can impact on a number of applications such as routine minimal- invasive diagnostics for medical samples, biomedical analysis, pharmaceutical or cosmetic research, quality control and process monitoring of food or environmental samples.

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35

Bastos, A. C. "Microbial volatile fongerprints : potential use for soil / water diagnostics and correlation with traditional microbial parameters." Thesis, Cranfield University, 2007. http://dspace.lib.cranfield.ac.uk/handle/1826/11340.

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This project used an electronic nose (E-nose) system composed of an array of 14 non- specific conducting polymer sensors for soil and water diagnostics, based on qualitative microbial volatile production patterns. It tested the feasibility of using soil microbial volatile fingerprints for detecting and monitoring changes in microbial activity in three soils, as a response to key environmental factors such as temperature (16, 25, 37°C), water potential (-0.7, -2.8 MPa), and nutrient (glucose and wheat straw) inputs. It also investigated their potential use for atrazine detection when applied to soil at usual field application rates (2.5 ppm) as well as for monitoring its bioremediation using the white-rot fungus Trametes versicolor (R26), for up to 24 weeks. Furthermore, statistical correlations were investigated between soil volatile profiles and traditional microbial parameters for characterising microbial communities and their metabolic activities such as respiration, dehydrogenase (DHA) and laccase (LAC) activities, bacterial and fungal colony counts and fungal community structure under different soil conditions. Finally, this study explored the potential of microbial volatile production patterns for monitoring the activity and differentiation of two Streptomyces species (S. aureofaciens A253 and S. griseus A26) in potable water and in soil, as well as the production of geosmin in both environments. Data in this research has demonstrated that the production of volatile organic compounds (VOC) in soil is likely to arise from microbial metabolism. The E-nose was able to detect variations in the patterns of volatile production from soil according to treatments, functioning as indicators of shifts in microbial activity and community structure. The potential for discrimination between soil types in relation to environmental factors and nutrient addition has been demonstrated for the first time using principle component analysis (PCA). Significant (p<0.05) correlations were also found between soil volatile patterns (through PC1) and traditional soil microbial parameters. The close relationship (r>0.80) between PC1 and soil respiration was particularly relevant, since it indicates that microbial volatile fingerprints, similarly to respiration, respond quickly to changes in soil conditions. The sensor array was also able to detect Streptomyces activity and differentiation as well as discriminate AC Bastos (2007) Soil & water volatile fingerprints between bacterial species at different concentrations in potable water and in soil. Using this approach, the presence of geosmin was detected in water at 0.5 ppb (below its human odour threshold detection, OTD) and in soil at 100 ppb (OTD not established). This study has, therefore, demonstrated that an E-nose can be employed as a rapid, sensitive, reproducible and non-invasive tool for characterising changes in soil environmental conditions, as well as for monitoring key soil processes such as organic matter decomposition and atrazine degradation. It also suggests that this approach can complement, and perhaps replace, some of these methods for a quick and routine evaluation of the impact of environmental factors on soil microbial communities. Furthermore, this study showed that an E-nose can also be employed for assessing Streptomyces activity and detecting geosmin production at an early stage in water and soil.

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36

Bastos, Ana Catarina. "Microbial volatile fingerprints : potential use for soil/water diagnostics and correlation with traditional microbial parameters." Thesis, Cranfield University, 2007. https://dspace.lib.cranfield.ac.uk/handle/1826/2412.

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This project used an electronic nose (E-nose) system composed of an array of 14 nonspecific conducting polymer sensors for soil and water diagnostics, based on qualitative microbial volatile production patterns. It tested the feasibility of using soil microbial volatile fingerprints for detecting and monitoring changes in microbial activity in three soils, as a response to key environmental factors such as temperature (16, 25, 37°C), water potential (-0.7, -2.8 MPa), and nutrient (glucose and wheat straw) inputs. It also investigated their potential use for atrazine detection when applied to soil at usual field application rates (2.5 ppm) as well as for monitoring its bioremediation using the white-rot fungus Trametes versicolor (R26), for up to 24 weeks. Furthermore, statistical correlations were investigated between soil volatile profiles and traditional microbial parameters for characterising microbial communities and their metabolic activities such as respiration, dehydrogenase (DHA) and laccase (LAC) activities, bacterial and fungal colony counts and fungal community structure under different soil conditions. Finally, this study explored the potential of microbial volatile production patterns for monitoring the activity and differentiation of two Streptomyces species (S. aureofaciens A253 and S. griseus A26) in potable water and in soil, as well as the production of geosmin in both environments. Data in this research has demonstrated that the production of volatile organic compounds (VOC) in soil is likely to arise from microbial metabolism. The E-nose was able to detect variations in the patterns of volatile production from soil according to treatments, functioning as indicators of shifts in microbial activity and community structure. The potential for discrimination between soil types in relation to environmental factors and nutrient addition has been demonstrated for the first time using principle component analysis (PCA). Significant (p<0.05) correlations were also found between soil volatile patterns (through PC1) and traditional soil microbial parameters. The close relationship (r>0.80) between PC1 and soil respiration was particularly relevant, since it indicates that microbial volatile fingerprints, similarly to respiration, respond quickly to changes in soil conditions. The sensor array was also able to detect Streptomyces activity and differentiation as well as discriminate between bacterial species at different concentrations in potable water and in soil. Using this approach, the presence of geosmin was detected in water at 0.5 ppb (below its human odour threshold detection, OTD) and in soil at 100 ppb (OTD not established). This study has, therefore, demonstrated that an E-nose can be employed as a rapid, sensitive, reproducible and non-invasive tool for characterising changes in soil environmental conditions, as well as for monitoring key soil processes such as organic matter decomposition and atrazine degradation. It also suggests that this approach can complement, and perhaps replace, some of these methods for a quick and routine evaluation of the impact of environmental factors on soil microbial communities. Furthermore, this study showed that an E-nose can also be employed for assessing Streptomyces activity and detecting geosmin production at an early stage in water and soil.

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37

Garcia, Bartels Natalie [Verfasser]. "Moderne Technologien zur Evaluation trichologischer Parameter : ihr Stellenwert in Diagnostik und Therapie / Natalie Garcia Bartels." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2012. http://d-nb.info/1031421343/34.

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38

Hamza, Amir [Verfasser]. "Diagnostik und Therapie der Komplikationen nach Nierentransplantation anhand klinischer, laborchemischer und immunologischer Parameter / Amir Hamza." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2009. http://d-nb.info/1024894657/34.

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39

Ahrens, Birgit Margret [Verfasser]. "Parameter in Diagnostik, Klinik und Verlauf von IgE-vermittelten Nahrungsmittelallergien im Kindesalter / Birgit Margret Ahrens." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2018. http://d-nb.info/1155760956/34.

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40

Gomez, Carrillo Andrea. "Low Frequency Oscillations of Hemodynamic Parameters as a Novel Diagnostic Measure for Traumatic Brain Injury." Wright State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1627226821857103.

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41

Ahrens, Birgit [Verfasser]. "Parameter in Diagnostik, Klinik und Verlauf von IgE-vermittelten Nahrungsmittelallergien im Kindesalter / Birgit Margret Ahrens." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2018. http://nbn-resolving.de/urn:nbn:de:kobv:188-fudissthesis000000106136-2.

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42

Dyachuk, Eduard. "Load diagnostic of power lines to control and optimize the utilization of wind energy." Thesis, Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10090.

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43

Bartalena, Tommaso <1976&gt. "Studio volumetrico del nodulo polmonare con TC multidetettore: influenza dei parametri di ricostruzione dell'immagine e dei software di analisi semiautomatica sui risultati della volumetria." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/2169/.

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44

Rajabi, Jaghargh Ehsan. "Effects of hemodynamic stresses on the remodeling parameters in arteriovenous fistula." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1427962400.

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45

Lienhardt, Stephanie Barbara. "Diagnostic criteria and follow-up parameters in Complex Regional Pain Syndrome type I : a Delphi survey /." [S.l.] : [s.n.], 2009. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000281140.

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46

Zey, Silke. "Der Stellenwert verschiedener PSA-abhängiger Parameter zur Optimierung der präoperativen Diagnostik bei Patienten mit symptomatischer Prostatahyperplasie." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968607691.

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47

Weimann, Andreas [Verfasser]. "Einsatz dynamischer Fluoreszenz-Flowzytometrie-Parameter zur Diagnostik von Anämien und Sepsis sowie zur Mortalitätsprädiktion / Andreas Weimann." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2017. http://d-nb.info/1127045296/34.

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48

LASSERRE, DOMINIQUE. "Interet predictif des differents parametres de la ph-metrie pour le diagnostic d'oesophagite peptique chez l'enfant." Toulouse 3, 1993. http://www.theses.fr/1993TOU31053.

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49

Lança, Luís Jorge Oliveira Carrasco. "Radiological imaging in digital systems: the effect of exposure parameters in diagnostic quality and patient dose." Doctoral thesis, Universidade de Aveiro, 2011. http://hdl.handle.net/10773/3950.

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Doutoramento em Tecnologias da Saúde
Esta tese pretende contribuir para o estudo e análise dos factores relacionados com as técnicas de aquisição de imagens radiológicas digitais, a qualidade diagnóstica e a gestão da dose de radiação em sistema de radiologia digital. A metodologia encontra-se organizada em duas componentes. A componente observacional, baseada num desenho do estudo de natureza retrospectiva e transversal. Os dados recolhidos a partir de sistemas CR e DR permitiram a avaliação dos parâmetros técnicos de exposição utilizados em radiologia digital, a avaliação da dose absorvida e o índice de exposição no detector. No contexto desta classificação metodológica (retrospectiva e transversal), também foi possível desenvolver estudos da qualidade diagnóstica em sistemas digitais: estudos de observadores a partir de imagens arquivadas no sistema PACS. A componente experimental da tese baseou-se na realização de experiências em fantomas para avaliar a relação entre dose e qualidade de imagem. As experiências efectuadas permitiram caracterizar as propriedades físicas dos sistemas de radiologia digital, através da manipulação das variáveis relacionadas com os parâmetros de exposição e a avaliação da influência destas na dose e na qualidade da imagem. Utilizando um fantoma contrastedetalhe, fantomas antropomórficos e um fantoma de osso animal, foi possível objectivar medidas de quantificação da qualidade diagnóstica e medidas de detectabilidade de objectos. Da investigação efectuada, foi possível salientar algumas conclusões. As medidas quantitativas referentes à performance dos detectores são a base do processo de optimização, permitindo a medição e a determinação dos parâmetros físicos dos sistemas de radiologia digital. Os parâmetros de exposição utilizados na prática clínica mostram que a prática não está em conformidade com o referencial Europeu. Verifica-se a necessidade de avaliar, melhorar e implementar um padrão de referência para o processo de optimização, através de novos referenciais de boa prática ajustados aos sistemas digitais. Os parâmetros de exposição influenciam a dose no paciente, mas a percepção da qualidade de imagem digital não parece afectada com a variação da exposição. Os estudos que se realizaram envolvendo tanto imagens de fantomas como imagens de pacientes mostram que a sobreexposição é um risco potencial em radiologia digital. A avaliação da qualidade diagnóstica das imagens mostrou que com a variação da exposição não se observou degradação substancial da qualidade das imagens quando a redução de dose é efectuada. Propõe-se o estudo e a implementação de novos níveis de referência de diagnóstico ajustados aos sistemas de radiologia digital. Como contributo da tese, é proposto um modelo (STDI) para a optimização de sistemas de radiologia digital.
In the present study an attempt has been made to contribute for the analysis of the factors related with the technical acquisition, the quality of the diagnostic image and dose management in digital detector systems for projection radiography. The thesis methodology is organized in two components. The observational component is based on a retrospective and transversal design. The data collected from CR and DR systems allowed the evaluation of exposure parameters from digital images, absorbed dose and exposure index to the detector. Under this classification (retrospective and transversal design) it was also possible to develop diagnostic quality evaluations from digital radiographic images: observer performance studies from digital images stored in the PACS. Under the experimental component of this thesis several experiments using phantoms were performed in order to evaluate the relation between dose and image quality. The experiments allowed the characterization of physical properties of digital image systems and manipulation of variables such as those related to exposure parameters and evaluation of its influence in dose and image quality. Using a contrast-detail phantom, anthropomorphic phantoms and an animal bone phantom it was possible to provide objective measures concerning the quantification of diagnostic quality and measures of object detectability. According to the research undertaken several conclusions could be highlighted. Quantitative measures of DR and CR detectors performance provide a basis for optimization, allowing to measure and determinate the physical properties of digital radiology image systems. Exposure parameters being used in digital radiography shows that current routine radiographic practice does not comply with European guidelines concerning exposure techniques. There is a need to evaluate, improve and establish a baseline reference aiming exposure optimization and provide new guidelines for current digital systems. Exposure parameters influence patient dose in digital radiology but image quality perception seems not to be affected with exposure variation. Studies performed both with phantoms and patients showed that overexposure is a potential risk when working with digital systems. Evaluation of diagnostic quality of digital images when a variation of exposure parameters is provided showed no substantial decrease in image quality when dose reduction is achieved. New dose reference levels should be studied and implemented according to the digital system characteristics and performance. A conceptual framework (STDI) is proposed as an attempt to provide a practical method to optimize digital radiology systems.
FCT/PROTEC

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50

Tang, Weidong Reeves Stanley J. "Reconstruction of parametric image maps in single- and multiple-coil functional magnetic resonance imaging." Auburn, Ala, 2009. http://hdl.handle.net/10415/1819.

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Dissertations / Theses on the topic 'Diagnostické parametry'

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