Dissertations / Theses on the topic 'Temporal Reliability'
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Baird, Sierra Marie. "Expected Profiles and Temporal Stability of The LOOK." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5470.
Full textHansen, Kristina S. Withers. "Reliability and a Measure of Sexual Interest: Examining the Temporal Stability of Scores on Affinity 2.5." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2817.
Full textAdcock, Jane Elizabeth St Vincent's Clinical School UNSW. "The reliability and clinical validity of functional magnetic resonance imaging in the assessment of language in pre-surgical patients with temporal lobe epilepsy." Awarded by:University of New South Wales. St Vincent's Clinical School, 2005. http://handle.unsw.edu.au/1959.4/22484.
Full textMyers, John R. "Evaluation and Mitigation of the Temporal Evolution of Microbial Contamination Risk in Surface Water Systems." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522418268900325.
Full textNeto, Antonio Carlos Pacheco e. Silva. "Fidedignidade do sistema compreensivo do Rorschach: revisão e estudo da estabilidade temporal em adultos da cidade de São Paulo." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/47/47131/tde-30112009-091310/.
Full textWe have evaluated the temporal stability of 59 Rorschach Comprehensive System (RCS) core variables. Our sample was composed of 32 nonpatients adults from the city of São Paulo, who volunteered to participate. They could have access to assessment results after the data collection. Participants were predominantly women (75%), single individuals (50%), from socioeconomic classes A (41%) and B (41%), with ages from 19 to 58 and 13 years of education on average. Twenty-five participants (78%) were employees from the university where the research was accomplished, two (6%) were students at the university and five (16%) were acquaintances of the employees. We used a test-retest design with a 3 to 4 months retest interval. All records were collected and codified by the author. A second rater independently coded 10 records from test and 10 records from retest, randomly selected. Interrater reliability was substantial (iota > .60) for most RCS variables. The mean test-retest correlation for the 59 core variables was r = .61, which indicates a moderate level of temporal stability. We also investigated directionality of proportions and categorical consistency. Between 44% and 70% of the participants were in the same interpretive category on test and retest. These results were lower than the original RCS research, but similar to the findings of a recent French study. Temporal stability for constellations was high, with at least 88% of the participants keeping the same negative or positive status on test and retest. Range restriction and skewness did not seem to explain the lower stability found in our sample, but the distributions of values for some variables, with a high frequency of participants with scores of zero and outliers, may have contributed. Task engagement in our sample apparently was similar to that found for the normative sample of adults from São Paulo, but lower than in the original RCS research. Lower task engagement may have contributed to the lower temporal stability. Factors of the testing situation seem to have played an important role in the results also. Brazilian users should take care in interpreting RCS results, mainly when task engagement is low (indicated by low R and high Lambda). More research with RCS in Brazil is needed, also to investigate procedures for obtaining higher task engagement, which may contribute to higher reliability and validity of test results.
Schwenke, Hannes Verfasser], Klaus [Akademischer Betreuer] [Willmes, and Klaus [Akademischer Betreuer] Mathiak. "Detailing reliability estimation of the individual working brain by varying spatial and temporal resolution in accelerated echo planar MR imaging / Hannes Schwenke ; Klaus Willmes-von Hinckeldey, Klaus Mathiak." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1126040800/34.
Full textSchwenke, Hannes [Verfasser], Klaus [Akademischer Betreuer] Willmes, and Klaus [Akademischer Betreuer] Mathiak. "Detailing reliability estimation of the individual working brain by varying spatial and temporal resolution in accelerated echo planar MR imaging / Hannes Schwenke ; Klaus Willmes-von Hinckeldey, Klaus Mathiak." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1126040800/34.
Full textDuan, Yuanyuan. "Statistical Predictions Based on Accelerated Degradation Data and Spatial Count Data." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/56616.
Full textPh. D.
Lampérière-Couffin, Sandrine. "De la vérification de cahiers des charges de systèmes à évènements discrets à la validation des spécifications décrites en Grafcet." Cachan, Ecole normale supérieure, 1998. http://www.theses.fr/1998DENS0009.
Full textKopka, Bernard. "Étude et validation d'une redondance homogène d'ordre deux à décalage temporel pour des applications à haut niveau de sécurité." Nancy 1, 1988. http://www.theses.fr/1988NAN10041.
Full textBoudali, Hichem. "A temporal Bayesian network reliability modeling and analysis framework /." 2005. http://wwwlib.umi.com/dissertations/fullcit/3169705.
Full textKabir, Sohag, M. Walker, Y. Papadopoulos, E. Rüde, and P. Securius. "Fuzzy temporal fault tree analysis of dynamic systems." 2016. http://hdl.handle.net/10454/17433.
Full textFault tree analysis (FTA) is a powerful technique that is widely used for evaluating system safety and reliability. It can be used to assess the effects of combinations of failures on system behaviour but is unable to capture sequence dependent dynamic behaviour. A number of extensions to fault trees have been proposed to overcome this limitation. Pandora, one such extension, introduces temporal gates and temporal laws to allow dynamic analysis of temporal fault trees (TFTs). It can be easily integrated in model-based design and analysis techniques. The quantitative evaluation of failure probability in Pandora TFTs is performed using exact probabilistic data about component failures. However, exact data can often be difficult to obtain. In this paper, we propose a method that combines expert elicitation and fuzzy set theory with Pandora TFTs to enable dynamic analysis of complex systems with limited or absent exact quantitative data. This gives Pandora the ability to perform quantitative analysis under uncertainty, which increases further its potential utility in the emerging field of model-based design and dependability analysis. The method has been demonstrated by applying it to a fault tolerant fuel distribution system of a ship, and the results are compared with the results obtained by other existing techniques.
Rinker, Jennifer Marie. "An Empirically Based Stochastic Turbulence Simulator with Temporal Coherence for Wind Energy Applications." Diss., 2016. http://hdl.handle.net/10161/12119.
Full textIn this dissertation, we develop a novel methodology for characterizing and simulating nonstationary, full-field, stochastic turbulent wind fields.
In this new method, nonstationarity is characterized and modeled via temporal coherence, which is quantified in the discrete frequency domain by probability distributions of the differences in phase between adjacent Fourier components.
The empirical distributions of the phase differences can also be extracted from measured data, and the resulting temporal coherence parameters can quantify the occurrence of nonstationarity in empirical wind data.
This dissertation (1) implements temporal coherence in a desktop turbulence simulator, (2) calibrates empirical temporal coherence models for four wind datasets, and (3) quantifies the increase in lifetime wind turbine loads caused by temporal coherence.
The four wind datasets were intentionally chosen from locations around the world so that they had significantly different ambient atmospheric conditions.
The prevalence of temporal coherence and its relationship to other standard wind parameters was modeled through empirical joint distributions (EJDs), which involved fitting marginal distributions and calculating correlations.
EJDs have the added benefit of being able to generate samples of wind parameters that reflect the characteristics of a particular site.
Lastly, to characterize the effect of temporal coherence on design loads, we created four models in the open-source wind turbine simulator FAST based on the \windpact turbines, fit response surfaces to them, and used the response surfaces to calculate lifetime turbine responses to wind fields simulated with and without temporal coherence.
The training data for the response surfaces was generated from exhaustive FAST simulations that were run on the high-performance computing (HPC) facilities at the National Renewable Energy Laboratory.
This process was repeated for wind field parameters drawn from the empirical distributions and for wind samples drawn using the recommended procedure in the wind turbine design standard \iec.
The effect of temporal coherence was calculated as a percent increase in the lifetime load over the base value with no temporal coherence.
Dissertation
Kabir, Sohag, T. K. Goek, M. Kumar, M. Yazdi, and F. Hossain. "A method for temporal fault tree analysis using intuitionistic fuzzy set and expert elicitation." 2019. http://hdl.handle.net/10454/17992.
Full textTemporal fault trees (TFTs), an extension of classical Boolean fault trees, can model time-dependent failure behaviour of dynamic systems. The methodologies used for quantitative analysis of TFTs include algebraic solutions, Petri nets (PN), and Bayesian networks (BN). In these approaches, precise failure data of components are usually used to calculate the probability of the top event of a TFT. However, it can be problematic to obtain these precise data due to the imprecise and incomplete information about the components of a system. In this paper, we propose a framework that combines intuitionistic fuzzy set theory and expert elicitation to enable quantitative analysis of TFTs of dynamic systems with uncertain data. Experts’ opinions are taken into account to compute the failure probability of the basic events of the TFT as intuitionistic fuzzy numbers. Subsequently, for the algebraic approach, the intuitionistic fuzzy operators for the logic gates of TFT are defined to quantify the TFT. On the other hand, for the quantification of TFTs via PN and BN-based approaches, the intuitionistic fuzzy numbers are defuzzified to be used in these approaches. As a result, the framework can be used with all the currently available TFT analysis approaches. The effectiveness of the proposed framework is illustrated via application to a practical system and through a comparison of the results of each approach.
This work was supported in part by the Mobile IOT: Location Aware project (grant no. MMUE/180025) and Indoor Internet of Things (IOT) Tracking Algorithm Development based on Radio Signal Characterisation project (grant no. FRGS/1/2018/TK08/MMU/02/1). This research also received partial support from DEIS H2020 project (grant no. 732242).
Germano, Gonçalo Marques. "Estudos Psicométricos com o Massachusetts Youth Screening Instrument (MAYSI-2): Fiabilidade (Teste-Reteste, Consistência Interna) e Validade Interna e Concorrente (com o Inventário de Sintomas Psicopatológicos - BSI)." Master's thesis, 2019. http://hdl.handle.net/10316/94845.
Full textA elevada prevalência de necessidades de saúde mental dos jovens inseridos no sistema de justiça juvenil realça a importância de instrumentos de rastreio psicológico que possam ser utilizados para identificar os casos que necessitem de avaliações mais rigorosas ou intervenção imediata. Neste âmbito, o presente estudo pretende dar continuidade ao programa de validação do Massachusetts Youth Screening Instrument – Version 2 (MAYSI-2) numa amostra de adolescentes institucionalizados em Centro Educativo a cumprir Medida Cautelar de Guarda e Medida Tutelar de Internamento. Esta investigação incluiu 45 jovens do Centro Educativo dos Olivais e do Centro Educativo Navarro Paiva, com idades compreendidas entre os 14 e os 18 anos, que responderam a um protocolo constituído pelo MAYSI-2 e pelo Inventário de Sintomas Psicopatológicos (BSI) num primeiro momento e, um mês depois, novamente pelo MAYSI-2.Foi comprovada a elevada necessidade de cuidados de saúde mental que estes jovens apresentam. Os dados encontrados relativos à estabilidade temporal teste-reteste dos resultados no MAYSI-2 não são aceitáveis do ponto de vista psicométrico. Igualmente problemáticos são os dados relativos à consistência interna de algumas escalas do MAYSI-2. No que diz respeito à validade concorrente, foram identificadas relações estatisticamente significativas, entre moderadas e fortes, entre constructos avaliados pelo MAYSI-2 e pelo BSI.Assim, é possível afirmar a utilidade geral deste instrumento de rastreio em instituições de justiça juvenil de forma a priorizar os casos mais urgentes ao nível da prestação de cuidados de saúde mental mas é necessária mais investigação no âmbito da estabilidade temporal das pontuações.
The high prevalence of young people's mental health needs in the juvenile justice system highlights the importance of psychological screening tools that can be used to identify cases that require more rigorous evaluations or immediate intervention. In this context, the present study intends to give continuity to the validation program of the Massachusetts Youth Screening Instrument - Version 2 (MAYSI-2) with a sample of adolescents institutionalized in Educational Center to fulfill a precautionary measure of custody and Tutelary Measure of Internment. This study included 45 young people from the Olivais Educational Center and the Navarro Paiva Educational Center, aged between 14 and 18 years, who responded a first time to a protocol consisting of MAYSI-2 and the Inventory of Psychopathological Symptoms (BSI) and, one month later, by MAYSI-2 again.The high need for mental health care that these boys presented has been proved. The obtained data regarding test retest reliability of the MAYSI-2 results is not acceptable in a psychometric point of view. Similarly problematic are data regarding the internal consistency of some of the MAYSI-2 scales. Concerning concurrent validity, it has been identified significant moderate to strong relationships among the constructs assessed by MAYSI-2 and BSI.Thus, it is possible to claim to the general usefulness of this screening instrument in juvenile justice institutions in order to prioritize the most urgent cases at the level of mental health care, but more research is needed about the temporal stability of the MAYSI-2 scores.
Gomes, Mariana Isabel cruz. "Avaliação ecológica do funcionamento executivo na infância: estudo das propriedades métricas de um inventário de avaliação das funções executivas em crianças e jovens dos 5 aos 11 anos." Master's thesis, 2017. http://hdl.handle.net/10400.5/14151.
Full textThe present study, with exploratory nature, aims to analyse internal and temporal reliability of the Behavioral Inventory for the Assessment of Executive Functions – parents’ version (ICAFE – P) (Rodrigues, Leitão, Ernst, Correia and Maia, 2015) regarding the Portuguese population and based on the Behavior Rating Inventory of Executive Function (BRIEF) (Gioia et al., 2000). It is a tool used to assess the executive functions in children and youngsters aged 5-18 in order to overcome the main limitations ascribed to other tests that do not consider the ecological perspective of development. The questionnaire was applied to parents of 301 children (n=301) between 5 and 11 years old which attend pre-school or elementary schools. The same was completed online, after each participant has given up their electronic mail. Results showed that the instrument presents good reliability measures. Good consistency of measurement indicators were found for the Behavioral Regulation Index, Metacognition Index and Global Executive Composite. Strong temporal reliability for the time established between the test and retest. The profile of the development of executive functions reveals significant differences between gender and age in some of the subscales that set up the instrument by asking questions regarding the development and trajectories of the different components of executive functions.
Kabir, Sohag, M. Walker, and Y. Papadopoulos. "Dynamic system safety analysis in HiP-HOPS with Petri Nets and Bayesian Networks." 2018. http://hdl.handle.net/10454/17426.
Full textDynamic systems exhibit time-dependent behaviours and complex functional dependencies amongst their components. Therefore, to capture the full system failure behaviour, it is not enough to simply determine the consequences of different combinations of failure events: it is also necessary to understand the order in which they fail. Pandora temporal fault trees (TFTs) increase the expressive power of fault trees and allow modelling of sequence-dependent failure behaviour of systems. However, like classical fault tree analysis, TFT analysis requires a lot of manual effort, which makes it time consuming and expensive. This in turn makes it less viable for use in modern, iterated system design processes, which requires a quicker turnaround and consistency across evolutions. In this paper, we propose for a model-based analysis of temporal fault trees via HiP-HOPS, which is a state-of-the-art model-based dependability analysis method supported by tools that largely automate analysis and optimisation of systems. The proposal extends HiP-HOPS with Pandora, Petri Nets and Bayesian Networks and results to dynamic dependability analysis that is more readily integrated into modern design processes. The effectiveness is demonstrated via application to an aircraft fuel distribution system.
Partly funded by the DEIS H2020 project (Grant Agreement 732242).
Malik, Tanweer. "Reliability of temporary structures." Thesis, 2003. http://hdl.handle.net/2429/18725.
Full textWang, Chung-Sheng, and 王鍾勝. "Reliability-Based Design and Second-order Analysis of Temporary Structures Used in Building Construction." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/6c2e53.
Full text國立雲林科技大學
工程科技研究所
106
The importance of dismantling contemporary construction after finishing the construction often is neglected by the builder. Above all the collapse cases happened in the construction sector, the severest one is that heavy casualties caused by the collapse of the Falsework. Besides, in order to cooperate with Urban Renewal, it is common that accidents caused by exterior walls renovation project scaffolding collapse. It bring about not only the constructors casualties problems but also passengers. Now the design of contemporary construction in Taiwan, we often use ASD of Elastic Analysis in Steel structure design. This kind of method only considers the safety factors of the structure which cannot evaluate the shoring structure load capacities which is close to the reality of LRFD. This research is based on the Reliability-Based Design, building falsework on load factors and the strength reduction factor to replace the「ASD」in Safety Factor ,to provide the design of the falsework. Nowadays, the rule of the steel structure design in the developed countries, such as Europe or the U.S. A. is that they should use second-order analysis. We can directly simulate the structure after loading dynamic behaviors, which can evaluate the load capacities or failure model correctly. This study discuss about dynamic behaviors of compound falsework. We take second-order analysis and full-size compound falsework indoor and outdoor structure load test in order to prove the accuracy of the second-order analysis. Moreover, the study focus on the second-order analysis used in the outer wall fixing scaffolding, at the same time, to confirm the reasons of collapse and failure model. According to the results of the research, setting jack base under the scaffolding can rise the load-bearing capacity of the scaffolding. It won’t have much effect if setting the upper U base. The load-bearing capacity in combined scaffolds only reaches half lead-bearing capacity with the same height of only one kind scaffolding. The load-bearing capacity of the scaffolding will rise complying with the number of the scaffolding, not with the multiple of the scaffolding. According to the experiment of outdoor combined setup, it can achieve the lateral bracing reinforcement effect without supporting capacity on the top. Using the Second-order Analysis to simulate the combined setup, we can get the destroyed mode which is much more accurate and close to the reality. It can also be beneficial to rising the supporting system of the safety assessment. The foot pedal of the scaffolding of out wall can restrain the scaffolding to become deformed, and at the same time, rise the load-bearing capacity of the unilateral cross-bar. It made no difference with bilateral cross-bar. It should take notice that scaffolding built at the entrance destroy the cross-bar. When the lateral force of scaffolding of out wall renovation project is getting stronger, the structure of the scaffolding gets lower. According to this research, we can use the axial-force and bending moment relation chart as reference when designing scaffolding of the renovation project.