Дисертації з теми "Diagnostic à distance"
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Kumar, Sachin. "Development of diagnostic and prognostic methodologies for electronic systems based on Mahalanobis distance." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9921.
Повний текст джерелаThesis research directed by: Reliability Engineering Program. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Darwesh, Aso. "Diagnostic cognitif en EIAH : le système PépiMep." Paris 6, 2010. http://www.theses.fr/2010PA066397.
Повний текст джерелаGliga, Lavinius ioan. "Diagnostic d'une Turbine Eolienne à Distance à l'aide du Réseau de Capteurs sans Fil." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMR063/document.
Повний текст джерелаDirect Drive Wind Turbines (DDWTs) are equipped with Permanent Magnet Syn- chronous Generators (PMSGs). Their three most common failures are demagnetization, ec- centricity (static, dynamic and mixed) and inter-turn short circuit. Machine Current Signa- ture Analysis is often used to look for generator problems, as these impairments introduce additional harmonics into the generated currents. The Fast Fourier Transform (FFT) is utilized to compute the spectrum of the currents. However, the FFT calculates the whole spectrum, while the number of possible faults and the number of introduced harmonics is low. The Goertzel algorithm, implemented as a filter (the Goertzel filter), is presented as a more efficient alternative to the FFT. The spectrum of the currents changes with the wind speed, and thus the detection is made more difficult. The Extended Kalman Filter (EKF) is proposed as a solution. The spectrum of the residuals, computed between the estimated and the generated current, is constant, regardless of the wind speed. However, the effect of the faults is visible in the spectrum. When using the EKF, one challenge is to find out the covariance matrix of the process noise. A new method was developed in this regard, which does not use any of the matrices of the filter. DDWTs are either placed in remote areas or in cities. For the monitoring of a DDWT, tens or hundreds of kilometers of cables are necessary. Wireless Sensor Networks (WSNs) are suited to be used in the communication infrastructure of DDWTs. WSNs have lower initial and maintenance costs, and they are quickly installed. Moreover, they can complement wired networks. Different wireless technologies are com- pared - both wide area ones, as well as short range technologies which support high data rates
Ben, Rabah Nourhène. "APPROCHE INTELLIGENTE À BASE DE RAISONNEMENT À PARTIR DE CAS POUR LE DIAGNOSTIC EN LIGNE DES SYSTÈMES AUTOMATISÉS DE PRODUCTION." Thesis, Reims, 2018. http://www.theses.fr/2018REIMS036/document.
Повний текст джерелаAutomated production systems (APS) represents an important class of industrial systems that are increasingly complex given the large number of interactions and interconnections between their different components. As a result, they are more susceptible to malfunctions, whose consequences can be significant in terms of productivity, safety and quality of production. A major challenge is to develop an intelligent approach that can be used to diagnose these systems to ensure their operational safety. In this thesis, we are only interested in the diagnosis of APS with discrete dynamics. We present in the first chapter these systems, the possible malfunctions and the used terminology for the diagnosis. Then, we present a state of the art of the existing methods for the diagnosis of this class of systems and also a synthesis of these methods. This synthesis motivated us to choose a data-based approach that relies on a machine learning technique, which is Case-Based Reasoning (CBR). For this reason, we presented in the second chapter a state of the art on machine learning and its different methods with a focus mainly on the CBR and its uses for the diagnosis of industrial systems. This study allowed us to propose in Chapter 3 a Case Based Decision Support System for the diagnosis of APS. This system is based on an online block and an offline block. The Offline block is used to define a case representation format and to build a Normal Case Base (NCB) and a Faulty Case Base (FCB) from a historical database. The online block helps human operators of monitoring to make the most appropriate diagnosis decision. The experiments results perform on a sorting system presented the pillars of this approach, which reside in the proposed case representation format and in the used case base. To solve these problems and improve the results, a new case representation format is proposed in chapter 4. According to this format and from the data acquired from the simulated system after its emulation in normal and faulty mode, cases of the initial case base are build. Then, a reasoning and incremental learning phase is presented. This phase allows the system diagnosis and the enrichment of the case base following the appearance of new unknown behaviors. The experiments presented in Chapter 5 and perform on the 'turntable' which is a subsystem of the 'sorting system” allowed to show the improvement of the results and also to evaluate and compare the performances of the proposed approach with some automatic learning approaches and with a model-based approach to turntable diagnosis
Leaf, Kyle, and Fulvio Melia. "A two-point diagnostic for the H ii galaxy Hubble diagram." OXFORD UNIV PRESS, 2018. http://hdl.handle.net/10150/627132.
Повний текст джерелаO'Donnell, Siobhán C. "One-leg hop for distance in the anterior cruciate ligament deficient population, diagnostic ability and determinants of performance." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63214.pdf.
Повний текст джерелаLanoix, Patrick. "L'entorse grave externe de la cheville : diagnostic, traitement, resultats a distance : a propos d'une serie de 58 entorses traitees chirurgicalement." Université Louis Pasteur (Strasbourg) (1971-2008), 1992. http://www.theses.fr/1992STR1M038.
Повний текст джерелаZhou, Hai-ying. "Réseau de capteurs sans fil dédié à la détection et au diagnostic d'arytmie cardiaque en temps réel, en continu et à distance." Clermont-Ferrand 2, 2004. http://www.theses.fr/2004CLF22539.
Повний текст джерелаAndré, Barbara. "Atlas intelligent pour guider le diagnostic en endomicroscopie : une application clinique de la reconnaissance d'images par le contenu." Phd thesis, École Nationale Supérieure des Mines de Paris, 2011. http://pastel.archives-ouvertes.fr/pastel-00640899.
Повний текст джерелаHughes, Stephen John. "Applications and diagnostics of time-distance helioseismology." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414378.
Повний текст джерелаNkengue, Marc Junior. "Développement d'un vêtement intelligent pour le suivi et diagnostic en temps-réel de patients atteints de COVID-19 long." Electronic Thesis or Diss., Centrale Lille Institut, 2024. http://www.theses.fr/2024CLIL0013.
Повний текст джерелаBased on the results (prototypes, sensors, algorithms) obtained in our previous projects (IOTFetMov (ANR), TexWeld (H2020)), this PhD thesis aims at designing a new intelligent garment, in order to detect and monitor in real time, the symptoms of long COVID-19 patient. We establish a pre-diagnosis by processing relevant signals using intelligent techniques. This intelligent garment, a close-fitting belt, integrates both a set of sensors, measuring physiological indices (skin temperatures, electrocardiogram) and embed a local decision support system allowing to estimate relevant parameters used for an automatic estimation of the connected patient health status, by learning from the measured signals and from the medical expert knowledge. A remote diagnosis can be carried out through interactions with the doctor via the e-textile and the patient's smartphone. In this way, a rapid worsening of symptoms will be detected early, and doctors will be able to react more quickly to manage patients
Dang, Vinh Q. "Evolutionary approaches for feature selection in biological data." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2014. https://ro.ecu.edu.au/theses/1276.
Повний текст джерелаOlivier, Nelly. "Surveillance des systèmes dynamiques hybrides : application aux procédés." Toulouse, INSA, 2007. http://eprint.insa-toulouse.fr/archive/00000207/.
Повний текст джерелаThese works present a fault detection and isolation methodology for the monitoring of Hybrid Dynamic Systems. The developed methodology rests on a mixed approach which combines a model-based method for the fault detection and an approach based on data (pattern matching) for the identification of fault(s). It is divided into three parts : 1)The first part concerns the reconstruction of the state of the system, thanks to the Extended Kalman Filter and the generation of the residuals by comparison between the predicted behavior (obtained thanks to the simulation of the reference model) and the real observed behavior (estimated by the Extended Kalman Filter). 2)The second part exploits these residuals for the generation of a complex structure: the non binary signatures. 3)The last part deals with the diagnosis of the fault and is based on a problem of pattern matching: the signature obtained in the previous part is compared with the theoretical fault signatures by means of distance. This methodology is integrated within the simulation platform PrODHyS, through the development of the module PrODHySAEM. Its use is illustrated by the studies of diagnosis problems in the field of Chemical Process System Engineering
Rammouz, Ramzy. "Optimisation de la gestion d’énergie dans les systèmes embarqués." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI122/document.
Повний текст джерелаWhether it is to monitor patients at home, or to prevent the isolation and vulnerability of the elderly, the emerging electronic monitoring and assistance systems offer new opportunities. The technological development we have witnessed allows individuals, hospitals, or medical aid organizations to provide the diagnosis, prevention, control or even treatment of patients outside of conventional clinical settings (measurements of physiological parameters, drug administration, fall detection, etc.).Recent developments in connected objects made efficient remote patient monitoring possible. In other words, we are able to use a network of wearable or implantable sensors to remotely obtain real time measurements of a patient’s vital signs (temperature, heart rate, blood pressure, etc.). Data is transmitted (and / or stored) to medical personnel who are able to perform diagnosis and define treatments accordingly. An optimal design (transmission protocols, data storage, etc.) and energy management are the bottlenecks involved in the implementation of such systems. This work proposes to develop a tool to help in the design of medical sensor networks. It aims to provide information regarding feasibility during the early stages of the design thus ensuring that a "well-constructed" circuit is obtained. The emphasis is on the control (or even reduction) of energy consumption. In this regard, an efficient energy consumption simulation at the beginning of the design flow would enable the user to decide on system parameters. This will ensure an optimal management of the available energy and eventually a longer network lifetime. The proposed tool is centered on the optimization of the energy consumption using Matlab environment. It is built over a model of the energy consumption of wireless sensor nodes. It is intended to be generic and accurate. In fact, it enables fast creation of new component description based on the datasheets. These components are reusable thus producing a growing database. In addition to energy consumption estimation, the tool uses optimization routines to guide the user through an energy aware design (picking energy sources, components, network configuration, etc.) that complies with medical requirements. An application to a single Bluetooth Low Energy body temperature sensor is first proposed. The same sensor is then included in a physiological sensor network. A physical implementation is used in order to compare the results obtained through simulation with practical measurements
Jensen, Trey Howard. "Impact of Distance, Diagnosis, and Demographics on Attendance for Rural Outpatient Treatment." ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/3170.
Повний текст джерелаBARSUGLIA, HENRI. "Interet de l'aspiration distale protegee dans le diagnostic des pneumopathies de reanimation." Clermont-Ferrand 1, 1990. http://www.theses.fr/1990CLF13066.
Повний текст джерелаBaade, Ingrid Annette. "Survival analysis diagnostics." Thesis, Queensland University of Technology, 1997.
Знайти повний текст джерелаBohuš, Michal. "Diagnostika chyb v počítačových sítích založená na překlepech." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2020. http://www.nusl.cz/ntk/nusl-417292.
Повний текст джерелаLeaf, Kyle, and Fulvio Melia. "Analysing H(z) data using two-point diagnostics." OXFORD UNIV PRESS, 2017. http://hdl.handle.net/10150/625514.
Повний текст джерелаNacheva-Skopalik, Lilyana Velikova. "An examination of an intelligent cybernetic learning model for formative assessment and diagnostics in open and distance learning." Thesis, Teesside University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517461.
Повний текст джерелаVenchiarutti, Rebecca. "Pathways to diagnosis and treatment of head and neck cancer: outcomes and experiences of patients in NSW." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/25061.
Повний текст джерелаYang, Junjie. "Fault Diagnosis and Prognosis in multivariate complex systems." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPAST001.
Повний текст джерелаFault diagnosis and prognosis have attracted huge attention in industry and academia for the increasing requirements on reliability, availability, maintainability, and safety.Despite the significant progress, the existing fault diagnosis methodologies still suffer from challenges, such as the lack of sufficient faulty data for training, ineffectiveness to complex distributed data, low sensitivity to incipient faults, and the interference of noise and outliers.Therefore, this work proposes a new one-class classification method implemented by generating anchors and selecting the region margin to determine a healthy region as a decision area.Then a particular distance measurement called local Mahalanobis distance is then defined to indicate the distance between a sample and the healthy region.Based on the proposed one-class classification method and the LMD index, this work first develops an incipient fault detection approach by combining the LMD index and the empirical probability density cumulative sum technique.This work also discusses the efficiency of LMD as a representative feature for fault detection.Secondly, this work proposes the faulty variable isolation method for single fault cases by combining the LMD technique with the contribution plot idea.Thirdly, an analytical expression of fault increasing rate is derived from the LMD index for the fault severity estimation task.Finally, we further develop a new reconstruction-based approach using the local Mahalanobis distance as a detection index to improve the isolation and estimation performance.The improved method can accurately isolate multiple faulty variables and estimate their fault amplitudes simultaneously.The case study based on the Continuous-flow Stirred Tank Reactor process data shows that the LMD technique has significant benefits for the fault diagnosis problem, such as high sensitivity to incipient faults, robustness to noise and outliers, and no distribution assumption.The fault diagnosis methods developed on LMD significantly outperform state-of-the-art solutions.The comparative study on the Case Western Reserve University bearing data indicates that the LMD technique can be used as a feature extraction approach and is more effective and robust than the other statistical techniques
Hernández, Molina Camerino. "Diagnostico nutricional con índice de Masa Corporal en adolescentes del Centro de Educación Media Superior a distancia de San Juan Atizingo, Ocuilan, México, 2013." Tesis de Licenciatura, Medicina-Quimica, 2014. http://ri.uaemex.mx/handle/123456789/14886.
Повний текст джерелаPometan, Bruno. "Ischémie aigue distale du membre supérieur au cours de la pratique sportive : à propos de deux cas." Bordeaux 2, 1999. http://www.theses.fr/1999BOR2M092.
Повний текст джерелаBittar, Eric. "Modèles déformables surfaciques, implicites et volumiques, pour l'imagerie médicale." Phd thesis, Grenoble 1, 1998. https://theses.hal.science/tel-00004869.
Повний текст джерелаBittar, Eric. "Modèles déformables surfaciques, implicites et volumiques, pour l'imagerie médicale." Phd thesis, Université Joseph Fourier (Grenoble), 1998. http://tel.archives-ouvertes.fr/tel-00004869.
Повний текст джерелаPeterle, Fabio. "Fault Detection and Diagnosis for Refrigeration Systems." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3425897.
Повний текст джерелаIl tema del raffrescamento è ricorrente nel mondo che ci circonda: i sistemi di climatizzazione negli ambienti residenziali sono gli esempi più comuni di sistemi di refrigerazione. Tuttavia anche nel trattamento, stoccaggio, trasporto e distribuzione di prodotti alimentari, così come nel settore sanitario e terziario, la refrigerazione svolge un ruolo centrale. Lo scopo principale della ricerca è l'analisi di alcune tecniche per l'individuazione e la diagnosi di guasti in questa tipologia di sistemi, anche detti chillers. All'interno del lavoro, il chiller è analizzato in tutti i suoi componenti, per i quali vengono dedotti il principio di funzionamento e le variabili significative per la rilevazione dei guasti. La ricerca procede all'analisi di metodologie statiche basate sui dati per il rilevamento di anomalie. Ognuna di esse prevede la costruzione di un modello del sistema; tale rappresentazione viene poi utilizzata nella fase di monitoraggio. La natura statica dei metodi proposti nella tesi riferisce all'uso, nella fase di identificazione del modello, di dati relativi a stati stazionari del sistema invece dell'intera evoluzione temporale dei segnali. In questo modo, il sistema è monitorato in condizioni di stazionarietà termodinamica e transitori improvvisi, difficili da caratterizzare matematicamente, sono eliminati dal database finale. La scelta di metodi basati sui dati è coerente con la direzione della letteratura corrente focalizzata su quegli approcci che non richiedono una descrizione fisica dettagliata del sistema monitorato. La possibilità di mettere a punto il modello dai dati rende tali tecniche facilmente applicabili a differenti impianti. In particolare, la tesi considera tre tecniche per la rilevazione di anomalie. Due di esse, la regressione lineare multipla e l'Analisi delle Componenti Principali (PCA), identificano un modello per i dati nella forma, rispettivamente, di una superficie e di un iperpiano di regressione, mentre la terza, la distanza di Mahalanobis, prende in considerazione le caratteristiche probabilistiche dell'insieme di dati. Queste tecniche sono generalmente utilizzate a scopo previsionale o per la riduzione dimensionale: nella tesi ne viene testata l'efficacia nel contesto della rilevazione di anomalie, illustrando le diverse filosofie dalle quali esse prendono spunto e commisurandone vantaggi e svantaggi. Il confronto viene proposto per degli insiemi di guasti simulati via software e per un caso reale.
Hollweck, Max-Lorenz [Verfasser]. "Elektrophysiologische Diagnostik von subklinischen sensiblen Defiziten durch distale elektrische und multimodale mechanische somatosensorisch evozierte Potentiale (SEP) bei Patienten mit Morbus Parkinson / Max-Lorenz Hollweck." Tübingen : Universitätsbibliothek Tübingen, 2021. http://d-nb.info/1229916245/34.
Повний текст джерелаWidener, Scott D. "Measuring Airport Efficiency with Fixed Asset Utilization to Minimize Airport Delays." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/485.
Повний текст джерелаDurastanti, Gilda. "Generazione personalizzata di superfici articolari di caviglia in ortopedia: confronti tra modelli geometrici ottenuti da diverse tecnologie di immagini diagnostiche." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Знайти повний текст джерелаKakino, Ryo. "Quantitative image analysis for prognostic prediction in lung SBRT." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263582.
Повний текст джерелаRickan, Helén. "Vägledning för alla? : Vilken typ av kommunikativa medel erbjuds till studerande vid distansvägledning?" Thesis, Stockholms universitet, Institutionen för pedagogik och didaktik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-91565.
Повний текст джерелаThe study of adult education can mean that you as a student is unable to attend physically for guidance at school. The reason could be that you as students do not live near the school, you work or have a diagnosis (eg, social phobia). The purpose of this study is to examine the nature of communicative resources offered to students. The thesis is a quantitative study, where 26 questionnaires sent by email to the academic and professional counselors with training in adult education. The results show that 18 out of 22 education providers offering guidance to these students, and that there is variation in the communicative means used for guidance. The web-based guidance proved to be limited; only three out of 18 respondents said they used Facebook, and camera / video calls (such as Skype or Adobe Connect). A finding is that the guidance offered primarily via email and over the phone for the most part by most of the respondents the training, but that communicative web-based resources (like Chat, Facebook and Skype) for guidance is not used as much. To guide other than physically in place, is an opportunity for more students to get guidance. Guidance can provide good career choice, which in turn could reduce early and therefore increase employability. With technology advancing and guidance development, perhaps guidance via the web-based communication medium can be something that all students can have access to in the future. The conclusion drawn is that the reasons why students do not have guidance, how remote guidance occurs and when it occurs - varies widely.
COSTA, Cecília Alves Buriti da. "Modelagem de um relé de distância em um simulador digital em tempo real." Universidade Federal de Campina Grande, 2016. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/580.
Повний текст джерелаMade available in DSpace on 2018-05-04T18:35:38Z (GMT). No. of bitstreams: 1 CECÍLIA ALVES BURITI DA COSTA – DISSERTAÇÃO (PPGEE) 2016.pdf: 2848486 bytes, checksum: eb2cfb57825ecee909a3560f654a3038 (MD5) Previous issue date: 2016-08-25
Capes
Este trabalho apresenta o processo de modelagem de um relé de distância em um simulador digital em tempo real. O modelo inclui: i) as principais funcionalidades da arquitetura de um relé digital, incluindo filtro anti-aliasing e estimação fasorial; ii) as características de operação do tipo mho e quadrilateral, ambas com duas zonas de atuação; iii) a etapa de diagnóstico de falta, que informa as principais características do distúrbio. Para o diagnóstico da falta, foram avaliados métodos de detecção, classificação e localização por meio de simulação em massa de diferentes cenários de falta em uma linha de transmissão. Dos resultados obtidos, os melhores métodos de cada etapa foram escolhidos para compor o relé. Ao final, a atuação e o diagnóstico do relé modelado foram comparados com os resultados fornecidos pelo relé de distância disponível no próprio simulador e por um relé digital real.
This work presents the modeling process of a distance relay in a real-time digital simulator. The model contains: i) the main features of a digital relay architecture, including anti-aliasing filter and phasor estimation; ii) mho and quadrilateral operating characteristics, with two protection zones; iii) fault diagnosis, which informs the main features of the disturbance. For the fault diagnosis, detection, classification and location methods were evaluated using batch mode simulation of different fault scenarios in a transmission line. From the obtained results, the best methods were selected to be part of the modeled relay. At the end, the operation and diagnosis of the modeled relay were compared with the results presented by the distance relay model provided by the simulator manufacturer and by a digital relay.
Dhinagar, Nikhil J. "Non-Invasive Skin Cancer Classification from Surface Scanned Lesion Images." Ohio University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1366384987.
Повний текст джерелаPintureau, Bernard. "Systematique evolutive du genre trichogramma westwood (hym. Trichogrammatidae) en europe." Paris 7, 1987. http://www.theses.fr/1987PA077148.
Повний текст джерелаFernandes, Montesuma Eduardo. "Multi-Source Domain Adaptation through Wasserstein Barycenters." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASG045.
Повний текст джерелаMachine learning systems work under the assumption that training and test conditions are uniform, i.e., they do not change. However, this hypothesis is seldom met in practice. Hence, the system is trained with data that is no longer representative of the data it will be tested on. This case is represented by a shift in the probability measure generating the data. This scenario is known in the literature as distributional shift between two domains: a source, and a target. A straightforward generalization of this problem is when training data itself exhibit shifts on its own. In this case, one consider Multi Source Domain Adaptation (MSDA). In this context, optimal transport is an useful field of mathematics. Especially, optimal transport serves as a toolbox, for comparing and manipulating probability measures. This thesis studies the contributions of optimal transport to multi-source domain adaptation. We do so through Wasserstein barycenters, an object that defines a weighted average, in the space of probability measures, for the multiple domains in MSDA. Based on this concept, we propose: (i) a novel notion of barycenter, when the measures at hand are equipped with labels, (ii) a novel dictionary learning problem over empirical probability measures and (iii) new tools for domain adaptation through the optimal transport of Gaussian mixture models. Through our methods, we are able to improve domain adaptation performance in comparison with previous optimal transport-based methods on image, and cross-domain fault diagnosis benchmarks. Our work opens an interesting research direction, on learning the barycentric hull of probability measures
Heidrich, Leonardo. "Diagnóstico do comportamento dos aprendizes na educação a distância com base no estilo de aprendizagem." Universidade do Vale do Rio dos Sinos, 2014. http://www.repositorio.jesuita.org.br/handle/UNISINOS/4350.
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Sistemas de computadores estão cada vez mais sendo utilizados por escolas e universidades para gerenciar os aprendizes em todo o mundo. Os dados gerados pela utilização de sistemas como Enterprise Resource Planning, Learning Management System e Ambientes Virtuais de Aprendizagem podem conter informações valiosas. Estas informações podem ser estrategicamente utilizadas para auxiliar os professores na tomada de decisão. No entanto, existem casos onde somente os dados históricos dos aprendizes não são suficientes para apoiar a tomada de decisão. A tomada de decisão pode ser requerida antes mesmo de se obter os dados históricos, por exemplo, para aprendizes recém matriculados. O Estilo de Aprendizagem pode complementar os dados históricos cobrindo essa lacuna através do cruzamento com os padrões de comportamento histórico. Uma vez coletado, o Estilo de Aprendizagem pode ser utilizado em qualquer momento futuro, pois é considerado estável de maneira a não mudar significativamente com o passar do tempo. Neste sentido, este trabalho tem por objetivo propor a avaliação da utilização do Estilo de Aprendizagem no diagnóstico antecipado do comportamento dos aprendizes na modalidade de Educação a Distância para o suporte à tomada de decisão. A hipótese de que existe relação entre o Estilo de Aprendizagem e o comportamento do aprendiz em um Ambientes Virtual de Aprendizagem surge a partir do entendimento do conceito de Estilo de Aprendizagem, onde as preferências cognitivas e comportamentais são descritas numericamente. O comportamento de aprendizes em um ambiente virtual é identificado através das suas interações com os elementos do ambiente virtual. Dessa maneira, os dados sobre estas interações podem ser relacionados com as variáveis que descrevem o Estilo de Aprendizagem, chamadas dimensões, permitindo com que o diagnóstico antecipado do comportamento possa ser realizado promovendo o suporte à tomada de decisão. Assim, esta dissertação traz os esfor- ços da potencial utilização do Estilo de Aprendizagem em doze experimentos de diagnóstico do comportamento do aprendiz. Os resultados destes experimentos sugerem que o Estilo de Aprendizagem pode explicar o comportamento do aprendiz relacionados à quantidade de interações no ambiente de aprendizagem, ao intervalo de tempo entra as interações e à evasão. A dimensão Sequencial/Global apresentou resultados claros de que é possível antecipar o comportamento do aprendiz utilizando apenas o estilo com acurácia entre 50 e 80% para praticamente todos os experimentos. Complementarmente, a dimensão Ativo/Reflexivo também apresentou resultados com o mesmo nível de acurácia, porém satisfazendo apenas metade dos experimentos.
Computer systems are increasingly being used by schools and universities to manage learners in the worldwide. The data generated by the use of systems such as Enterprise Resource Planning, Learning Management System and Virtual Learning Environments can contain valuable information. This information can be used strategically to support teachers in decision making. However, there are situations where only the learners’ historical data are not sufficient to support decision making. Decision making may be required even before obtaining historical data, in example, for newly registered learners. The learner Learning Style can complement historical data covering this gap through the intersection with the historical behavior patterns. Once collected, learning style can be used at any time in the future, it is considered stable so as not change significantly over time. Thus, this thesis aims to propose a evaluation of the potential use of Learning Style in the early learner behavior diagnosis in the distance learning to support decision making. The hypothesis that there is a relation between Learning Style and the learner behavior in Virtual Learning Environments arises from the understanding of the concept of Learning Style, where the cognitive and behavioral preferences are described numerically. The learners’ behavior in a virtual environment is identified through its interaction with the elements of the virtual environment. Thus, the data generated from these interactions can be related to the variables that describe the Learning Style, called dimensions, allowing that early behavior diagnosis can be achieved by promoting the support to decision making. Thus, this dissertation brings the efforts of the potential use of Learning Style to diagnose learners’ behavior in twelve experiments. The results of these experiments suggest that the Learning Style can explain the learner behavior related to the amount of interaction in the learning environment, the interval of time among interactions and evasion. The Sequential/Global dimension had clear results that it is possible to anticipate the learner behavior using only the style with accuracy between 50 and 80% for almost all experiments. In addition, the Active/Reflective dimension also presented results with the same level of accuracy, however satisfying only half of the experiments.
Giugliano, Maria Maddalena. "Diagnostic Measures for Multinomial Distance Model." Tesi di dottorato, 2014. http://www.fedoa.unina.it/9889/1/Thesis.pdf.
Повний текст джерелаMages, Laura. "CT-Untersuchung bei Radiusfrakturen: Die Rolle der prä- und postoperativen CT-Diagnostik in Bezug auf Osteosyntheseverfahren und postoperative Revisionsrate." Doctoral thesis, 2019. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-178631.
Повний текст джерелаBackground: Distal radius fractures are one of the most common fractures and often pose a big challenge to the surgeon. In our study we assess the role of the pre-and postoperative CT scan relating to the postoperative outcome and try to revalue the indications of postoperative CT scan. Patients and Methods: 163 patients with 173 intraarticular distal radius fractures were included in this study. They were split in two groups without (group 1, 78 patients) and with (group 2, 85 patients) postoperative CT scan. The postoperative radiographs of group 2 were split in 3 categories and compared to the postoperative CT scan. Results: The results of this correlation showed a high statistical significance regarding the revision rate. Conclusions: A normal x-ray photograph can often avoid a postoperative CT scan. To support the surgeon`s decision for or against a postoperative CT scan we worked out a simple algorithm with the intention to minimize the radiation exposure for the patients without limiting the postoperative outcome
"The ecology of infectious pathogens in a long distance migratory bird, the blue-winged teal (Anas discors): from individuals to populations." Thesis, 2013. http://hdl.handle.net/10388/ETD-2013-05-1063.
Повний текст джерела(11178285), Jose Capa Salinas. "An Unmanned Aerial Systems Evaluation Chamber for Bridge Inspection." Thesis, 2021.
Знайти повний текст джерелаCivil engineering structures must provide an adequate and safe performance during their time of service, and the owners of these structures must have a reliable inspection strategy to ensure time-dependent damage does not become excessive. Visual inspection is the first step in every structural inspection; however, many elements in the majority of structures are difficult to access and require specialized personal and equipment. In an attempt to reduce the risk of the inspector and the cost of additional equipment, the use of Unmanned Aircraft Systems (UAS) has been increasing in the last years. The absence of standards and regulations regarding the use of UAS in inspection of structures has allowed the market to widely advertise Unmanned Aerial Vehicles (UAV) without protocols or qualifications that prove their effectiveness, leaving the owners of the structures to solely rely on claims of the vendors before deciding which technology suits their particular inspection needs. Focusing primarily on bridge inspection, this research aimed to address the lack of performance-based evaluation and standards for UAS, developing a validation criterion to evaluate a given UAS based on a repeatable test that resembles typical conditions in a structure.
Current applications of UAS in inspection of structures along with its advantages and limitations were studied to determine the current status of UAS technologies. A maximum typical rotor-tip-to-rotor-tip distance of an UAV was determined based on typical UAVs used in bridge inspection, and two main parameters were found to be relevant when flying close to structures: proximity effects in the UAV and availability of visual line of sight. Distances where proximity effects are relevant were determined based on several field inspections and flights close to structures. In addition, the use of supplementary technologies such as Global Positioning System (GPS) and Inertial Measurement Units (IMU) was studied to understand their effect during inspection.
Following the analysis, the author introduces the idea of a series of obstacles and elements inside an enclosed space that resemble components of bridge structures to be inspected using UAVs, allowing repeatability of the test by controlling outside parameters such as lighting condition, wind, precipitation, temperature, and GPS signal. Using distances based on proximity effects, maximum typical rotor-tip-to-rotor-tip distance, and a gallery of bridges and situations when flying close to bridge structures, a final arrangement of elements is presented as the evaluation chamber. Components inside the evaluation chamber include both “real” steel and concrete specimens as well as those intended to simulate various geometric configurations on which other features are mounted. Pictures of damages of steel and concrete elements have been placed in the internal faces of the obstacles that can be assessed either in real-time flight or in post-processing work. A detailed comparison between the objectives of this research project and the results obtained by the evaluation chamber was performed using visual evaluation and resolution charts for the images obtained, the availability of visual line of sight during the test, and the absence of GPS signal.
From the comparison and analysis conducted and based on satisfactory flight results as images obtained during flights, the evaluation chamber is concluded to be a repeatable and reliable tool to apply to any UAS prior to inspect bridges and other structures, and the author recommends to refrain from conducting an inspection if the UAS does not comply with the minimum requirements presented in this research work. Additionally, this research provided a clearer understanding of the general phenomenon presented when UAVs approach structures and attempts to fill the gap of knowledge regarding minimum requirements and criterion for the use of UAS technologies in inspection of structures.