Rozprawy doktorskie na temat „Validated simulation”
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Sprawdź 37 najlepszych rozpraw doktorskich naukowych na temat „Validated simulation”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Przeglądaj rozprawy doktorskie z różnych dziedzin i twórz odpowiednie bibliografie.
Kambourides, Miltos E. "Nonparametic-validated computer-simulation surrogates : a Pareto formuation". Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43931.
Pełny tekst źródłaStainton, Andrew. "To what extent can total enterprise simulation be validated?" Thesis, University of Southampton, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438665.
Pełny tekst źródłaHobson, P. A. "Thermosyphon solar water heaters : validated numerical simulation and design correlations". Thesis, Cranfield University, 1988. http://hdl.handle.net/1826/4361.
Pełny tekst źródłaMaxeÌ, n. Fredrik. "Comparative analysis of network approaches for tactical wireless communications, validated by Joint Communication Simulation System (JCSS) simulations a Swedish perspective". Thesis, Monterey, California. Naval Postgraduate School, 2011. http://hdl.handle.net/10945/5555.
Pełny tekst źródłaThis thesis project explores two approaches for military tactical wireless communications solutions in the context of being useful for the Swedish Armed Forces. The study's tactical perspective focuses on a force of battalion size. The two network approaches, ad hoc networking and infrastructure based, were analyzed and compared via simulation. As a baseline for this thesis project, research was initiated based on appropriate communication requirements for the tactical force. This was followed by background research into current technologies for ad hoc networking and infrastructure-based systems. In order to analyze and compare the two technology approaches, a model was developed using the software Joint Communication Simulation System (JCSS) and a battalion-sized network simulation using ad hoc and infrastructure-based technology. This thesis project addressed tactical force requirements from the perspective of the basic Swedish Armed Forces principle for command and control, which is Maneuver Warfare. Evaluation of the technologies is discussed through the important perspectives of capacity, mobility, flexibility, robustness, interoperability, and cost. By analyzing the technology approaches from these perspectives, this thesis project attempts to provide the Swedish Armed Forces with more information and understanding, which in-turn will allow better-suited future developments of all tactical wireless communication systems.
Duracz, Adam. "Rigorous Simulation : Its Theory and Applications". Doctoral thesis, Högskolan i Halmstad, Centrum för forskning om inbyggda system (CERES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-32608.
Pełny tekst źródłaNiazi, Muaz A. K. "Towards a novel unified framework for developing formal, network and validated agent-based simulation models of complex adaptive systems". Thesis, University of Stirling, 2011. http://hdl.handle.net/1893/3365.
Pełny tekst źródłaBertin, Étienne. "Robust optimal control for the guidance of autonomous vehicles". Electronic Thesis or Diss., Institut polytechnique de Paris, 2022. http://www.theses.fr/2022IPPAE012.
Pełny tekst źródłaThe guidance of a reusable launcher is a control problem that requires both precision and robustness: one must compute a trajectory and a control such that the system reaches the landing zone, without crashing into it or exploding mid-flight, all while using as little fuel as possible. Optimal control methods based on Pontryagin's Maximum Principle can compute an optimal trajectory with great precision, but uncertainties, the discrepancies between estimated values of the initial state and parameters and actual values, cause the actual trajectory to deviate, which can be dangerous. In parallel, set-based methods and notably validated simulation can enclose all trajectories of a system with uncertainties.This thesis combines those two approaches to enclose sets of optimal trajectories of a problem with uncertainties to guarantee the robustness of the guidance of autonomous vehicles.We start by defining sets of optimal trajectories for systems with uncertainties, first for mathematically perfect trajectories, then for the trajectory of a vehicle subject to estimation errors that can use, or not use, sensor information to compute a new trajectory online. Pontryagin's principle characterizes those sets as solutions of a boundary value problem with dynamics subject to uncertainties. We develop algorithms that enclose all solutions of these boundary value problem using validated simulation, interval arithmetic and contractor theory. However, validated simulation with intervals is subject to significant over-approximation that limits our methods. To remedy that we replace intervals by constrained symbolic zonotopes. We use those zonotopes to simulate hybrid systems, enclose the solutions of boundary value problems and build an inner-approximation to complement the classical outer-approximation. Finally, we combine all our methods to compute sets of trajectories for aerospace systems and use those sets to assess the robustness of a control
Benson, Kristen D. "Use of centrifuge modelling to validate an unsaturated transport numerical simulation". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2002. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ65665.pdf.
Pełny tekst źródłaPapapanagiotou, Nikolaos, Eugen Constantin, Sanjeev Singh i Nikolaos Papapanagiotou. "Analysis of DDD and VDT simulation techniques to determine feasibility of using VDT simulation to validate DDD models". Monterey, California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/9925.
Pełny tekst źródłaMBA Professional Report
Approved for public release; distribution is unlimited.
The purpose of this MBA project was to determine whether and how VDT can emulate the results obtained from A2C2 Experiments. To do that, we have first focused on learning the basics of VDT and DDD simulation techniques and then on how the models used in DDD can be analyzed using VDT. To this end, we obtained experimental data from DDD Experiment 8 and created representative models in VDT to determine the similarities and differences. We also kept detailed records of our research to assist individuals in the future who may want to expand on our work. The project involved studying of DDD and VDT techniques, establishing building blocks in VDT, creating a best effort model for DDD Experiment 8 and studying the various outcomes. In this project we could not successfully replicate the complex DDD Experiment 8 scenarios within VDT. However, important conclusions were drawn that would go a long way towards helping future studies in this regard.
Benezech, Laurent Jean-Michel Dimotakis Paul E. "Premixed hydrocarbon stagnation flames : experiments and simulations to validate combustion chemical-kinetic models /". Diss., Pasadena, Calif. : California Institute of Technology, 2008. http://resolver.caltech.edu/CaltechETD:etd-05302008-113043.
Pełny tekst źródłaMiller, Craig. "A Research Based General Framework for Effective Simulation Development and Methodology to Validate Economic Fidelity". Thesis, Metropolitan State University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3668376.
Pełny tekst źródłaThe three primary objectives of this project were: (1) to identify and codify a framework for best practices in developing a simulation; (2) to construct a prototype or test simulation based on these best practices, and (3) to create a methodology to assess pedagogical efficacy and economic fidelity.
While the current body of knowledge is rich in describing the virtues and pitfalls of computer simulation technology that has existed for close to 60 years, the literature nonetheless lacks a codified set of best practices for developers and objective assessment methods to judge a simulation quality for both the pedagogical effectiveness and economic fidelity. This study addresses both issues and offers a solution that is unique and effective. A General Framework for Effective Simulation Development that is derivative, and an extension of existing research in the business simulation domain. A simulation prototype, SimWrite!, has been developed that is consistent with the 12 elements identified in this framework. Each stage of the development of this test simulation is explicitly tied to the best practices that emerged from the literature. A second assessment tool, The Economic Theory Input-Output Matrix, is presented to enable a user to measure the economic fidelity of a simulation. This tool is based on microeconomic theory that is taught at business schools throughout the globe. Both assessment tools will be applied to the test simulation in a manner that will enable the user to replicate this research with other simulations they are interested in. The products of this dissertation are intended to aid current and future developers make better simulations and faculty users of simulations to better select simulations that will help them to achieve the goal of all involved in teaching business: To produce greater learning for students.
Singer, Gideon. "Methods for Validatng Cockpit Design The best tool for the task". Doctoral thesis, KTH, Aeronautical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3315.
Pełny tekst źródłaShaw, J. "Use of plant growth simulations to validate BRDF model parameters derived SPOT-VGT data". Thesis, Swansea University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639015.
Pełny tekst źródłaSturisky, Selwyn H. "A linear system identification and validaton of an AH-64 apache aeroelastic simulation model". Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/13402.
Pełny tekst źródłaGhita, Monica. "Computer simulations to estimate organ doses from clinically validated cardiac, neuro, and pediatric protocols for multiple detector computed tomography scanners". [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0025006.
Pełny tekst źródłaMiller, Mark Stephen. "Use of osmotic coefficient measurements to validate and to correct the interaction thermodynamics of amino acids in molecular dynamics simulations". Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6476.
Pełny tekst źródłaMALIZIA, ANDREA. "Dust mobilization problem in an experimental nuclear reactor: experiments with stardust and simulations to validate a first re-suspension numerical model". Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2010. http://hdl.handle.net/2108/1325.
Pełny tekst źródłaBochníček, Štěpán. "Validace numerické simulace průběhu plnění matečné formy voskem a její následná optimalizace". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230975.
Pełny tekst źródłaHoelzenbein, Angela C. [Verfasser], i Karl Christoph [Akademischer Betreuer] Klauer. "'Mind the Gap': Simulation studies to validate the quality of multiple imputation = 'Mind the Gap': Simulationsstudien zur Validierung der Güte von Multipler Imputation". Freiburg : Universität, 2015. http://d-nb.info/111924644X/34.
Pełny tekst źródłaMokrý, Michal. "In silico návrh a validace peptidových derivátů konotoxinu pro nanoterapii neuroblastomu". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442491.
Pełny tekst źródłaRichtr, Jiří. "Využití diskrétní simulace při řízení výrobního procesu". Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2011. http://www.nusl.cz/ntk/nusl-223057.
Pełny tekst źródłaRaffai, Peter. "Modeling the Impact of Piston Rings on Oil Consumption of Internal Combustion Engines". Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-316144.
Pełny tekst źródłaVrána, Jakub. "Optimalizace výrobního procesu ve společnosti". Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2013. http://www.nusl.cz/ntk/nusl-223905.
Pełny tekst źródłaVyhlídalová, Karolína. "Zásobník tepla solární soustavy". Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-433632.
Pełny tekst źródłaCekl, Jakub. "Model palivového souboru tlakovodního reaktoru západní koncepce". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-376896.
Pełny tekst źródłaLung, Hua-Hung, i 龍驊翃. "Computer Simulation Validated of The Innovation Micro-Gravity Algorithm". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/31872060846226104207.
Pełny tekst źródła國立中央大學
光機電工程研究所
100
This thesis is to verify the innovative micro-gravity algorithm that prof. Jiang Shi Biao proposed, through the computer simulation, and developed the MEMS-type micro-gravimeter and its verification platform. In this thesis, the results of computer simulation shows the feasibility of this algorithm, provides the information of the whole system for the MEMS-type micro-gravimeter circuit design specifications, software, also reduces the volume of the gravimeter and development costs. The follow-up construction of the system verification platform, provides the MEMS-type gravimeter experiment platform.
Martins, Joana Maria Ferreira Alvura da Hora. "Performance Criteria to Validate Simulation Models". Master's thesis, 2012. https://repositorio-aberto.up.pt/handle/10216/66658.
Pełny tekst źródłaMartins, Joana Maria Ferreira Alvura da Hora. "Performance Criteria to Validate Simulation Models". Dissertação, 2012. https://repositorio-aberto.up.pt/handle/10216/66658.
Pełny tekst źródłaBenezech, Laurent Jean-Michel. "Premixed Hydrocarbon Stagnation Flames: Experiments and Simulations to Validate Combustion Chemical-Kinetic Models". Thesis, 2008. https://thesis.library.caltech.edu/2316/6/index.html.
Pełny tekst źródłaA methodology based on the comparison of flame simulations relying on reacting flow models with experiment is applied to C1–C3 stagnation flames. The work reported targets the assessment and validation of the modeled reactions and reaction rates relevant to (C1–C3)-flame propagation in several detailed combustion kinetic models. A concensus does not, as yet, exist on the modeling of the reasonably well-understood oxidation of C1–C2 flames, and a better knowledge of C3 hydrocarbon combustion chemistry is required before attempting to bridge the gap between the oxidation of C1–C2 hydrocarbons and the more complex chemistry of heavier hydrocarbons in a single kinetic model.
Simultaneous measurements of velocity and CH-radical profiles were performed in atmospheric propane(C3H8)- and propylene(C3H6)-air laminar premixed stagnation flames stabilized in a jet-wall configuration. These nearly-flat flames can be modeled by one-dimensional simulations, providing a means to validate kinetic models. Experimental data for these C3 flames and similar experimental data for atmospheric methane(CH4)-, ethane(C2H6)-, and ethylene(C2H4)-air flames are compared to numerical simulations performed with a one-dimensional hydrodynamic model, a multi-component transport formulation including thermal diffusion, and different detailed-chemistry models, in order to assess the adequacy of the models employed. A novel continuation technique between kinetic models was developed and applied successfully to obtain solutions with the less-robust models. The 2005/12 and 2005/10 releases of the San Diego mechanism are found to have the best overall performance in C3H8 and C3H6 flames, and in CH4, C2H6, and C2H4 flames, respectively.
Flame position provides a good surrogate for flame speed in stagnation-flow stabilized flames. The logarithmic sensitivities of the simulated flame locations to variations in the kinetic rates are calculated via the "brute-force" method for fifteen representative flames covering the five fuels under study and the very lean, stoichiometric, and very rich burning regimes, in order to identify the most-important reactions for each flame investigated. The rates of reactions identified in this manner are compared between the different kinetic models. Several reaction-rate differences are thus identified that are likely responsible for the variance in flame-position (or flame-speed) predictions in C1–C2 flames.
Chun-RenZhang i 張淳仁. "Design Approach to Synthesize, Validate, and Evaluate Operating Procedures Based on Timed Automata and Dynamic Simulation". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7upubw.
Pełny tekst źródła國立成功大學
化學工程學系
107
Despite the fact that the modern chemical plants are becoming much more complex than they used to be, their operating procedures are still generated manually in most cases. Since this approach is clearly laborious, time-consuming and error prone, it is necessary to develop a viable approach to systematically and automatically conjecture a set of reliable control actions to perform various tasks in realistic chemical processes. With timed automata and dynamic simulation, the tasks of synthesizing, validating and evaluating operating procedures have been accomplished in this work. Specifically, the following steps are carried out: First of all, it is necessary to discretize all state variables in the given system and then build the untimed automata for modeling the basic components according to generic engineering knowledge. Secondly, the elapsed times of all possible state transfers for every processing unit can be determined with Aspen Plus Dynamics and the corresponding timed automata can then be built to model these units. Next, after identifying the critical stages of the entire operation, one can stipulate the control specifications of each stage and build the corresponding automata. All automata built above should then be integrated and synthesized into a system model. Consequently, the shortest or quickest trace in the system may be extracted with UPPAAL and every trace summarized with a sequential function chart (SFC). Finally, the SFCs should be verified with Aspen Plus Dynamics. If the simulation study confirms that all SFCs are unsafe and/or infeasible, one should modify/add/remove the control specifications and repeat the aforementioned synthesis steps. The above procedure has been applied successfully to three examples, i.e., the start-up operations of a continuous flash drum, a continuous distillation column and a continuous reactive distillation column.
LIU, TE-SHENG, i 劉得笙. "Taking the Advantage of Acceleration Response of a Geosynthetic Reinforced Slope to Validate the Seismic Numerical Simulation". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7476b3.
Pełny tekst źródła國立宜蘭大學
土木工程學系碩士班
106
The Ilan area is near the seismic zone of northeastern Taiwan, and the earthquakes are quite frequent. In order to understand the seismic behavior of the geosysthetic reinforced slope comprehensively, this study is carried out by installing seismic accelerometers at the different positions of the geosysthetic reinforced slope built in the FoGuang University. Earthquake monitoring data recorded on the site are used as validation basis for the studying dynamic responses. From the data obtained by the monitoring program, it can be recognized that the maximum acceleration of the geosynthetic reinforced slope under the action of the earthquake will be amplified with the height of the slope. The recorded seismic data will be used by the PLAXIS finite element program to simulate the seismic behavior of the geosynthetic reinforced slope. In order to understand more about the seismic wave propagation behavior inside the geosynthetic reinforced slope, this study uses the PLAXIS finite element program to perform dynamic analysis. From the results of numerical simulation, it is found that the geosynthetic reinforced slope has obvious scale-up behavior in the middle layer and the top layer. In the dynamic analysis, it often takes a lot of calculation time for numerical simulation process. In order to further understand the impact of seismic wave propagation between finite elements on geosynthetic reinforced slopes, this study tries to use different nodal elements for dynamic analysis, namely 6-node and 15-node finite elements. The 6-nodal unit effectively interprets the dynamic behavior of geosynthetic reinforced slopes with condensed computational time. In this study, we integrate the acceleration time history data of the earthquakes on the site, and convert the acceleration duration graphs monitored at different positions into acceleration response spectra. It can be seen that the same earthquake has different periodic peak changes in different position. This study analyzes the predicted results of the geosysthetic reinforced slope, and then converts the simulated earthquake acceleration duration graphs into seismic acceleration response spectrum as well. In this study, in addition to the maximum acceleration, the change of the acceleration response spectrum is studied to understand the dynamic behavior of the slope and to discuss the influence of soil parameters on the acceleration response spectrum using PLAXIS. Due to the wide variety of soil parameters affecting the results of the dynamic analysis of the FEM model, this study specifically focuses on the material damping ratio and the elastic modulus of the soil material.
Venâncio, Ana Cláudia Serdoura. "Self-Report Symptom Inventory (SRSI): Estudos de validação em contexto prisional (design de simulação análogo, validade convergente e validade discriminante)". Master's thesis, 2021. http://hdl.handle.net/10316/99302.
Pełny tekst źródłaThe adoption of biased response styles, such as the simulation and exaggeration of psychopathological symptoms, by an examinee, composes a threat to the validity of the results of a (neuro)psychological assessment, especially in forensic contexts, in which secondary gains can stand out. Symptom Validity Tests (SVT) aim to detect the presence of such response styles/ behaviors, in order to provide mental health professionals more reliable interpretations of an individual's actual psychological functioning profile.This study seeked to continue the validation process of the Self-Report Symptom Inventory (SRSI; Merten et al., 2016) for the portugueses prison context. To achieve the mentioned goal, to a prison sample of 100 inmates, aged between 18 and 72 years old, was administered an assessment protocol consisting of the following instruments: the SRSI, the Structured Inventory of Malingered Symptomatology (SIMS; Smith & Burger, 1997; Widows & Smith, 2005; portuguese version: Simões, Almiro, Mota, et al., 2017), the Symptom Validity Scale – Version 2 (EVS-2; Simões, Almiro, Nunes, et al., 2017; Cunha, 2011) and the Brief Symptom Inventory (BSI; Derogatis, 1982; portuguese version: Canavarro, 2007). The present SRSI validation study was based on analogous simulation design, in an intra-subject way. Therefore, all participants answered to the SRSI in two contiguous moments: in a honest way (“honest” condition) and according to instructions (cover story – “simulation” condition) built in line with the recommendations that emerge from the scientific literature, in an attempt to maximize the possibility of generalizability of the data.Regarding the results, the reliability studies (internal consistency of the SRSI scores) indicate high values of Cronbach's alpha for both scales, in both conditions. In the context of convergent validity studies, it should be noted that the SRSI has validity with other TVS (e.g., SIMS and EVS-2), since the results showed the existence of positive, high and significant relationships between the Pseudo-symptoms scale (SRSI) and the total result of the SIMS and EVS-2 (instruments that measure similar theoretical constructs). In the same sense, and as expected, positive, moderate and/or strong correlations were observed between the Genuine Symptoms scale (SRSI) and the BSI global indices (instrument that measures the presence of genuine psychopathology). In the domain of discriminant validity, non-significant, reduced or null correlations were expected between the Pseudo-symptoms scale (SRSI) and the BSI, due to the measurement of non-overlapping constructs. Nevertheless, the results suggested that Pseudo-symptoms scale proved to be equally sensitive to the presence of psychopathology, since there were moderate and strong correlations between it and the global BSI indices – aspect that indicates lack of discriminant validity. In turn, as expected, positive but reduced correlations were observed between the total of the Genuine Symptoms scale (in the “honest” condition) and the total of the Pseudo-symptoms scale (in the “simulation” condition). Also with regard to discriminant validity, it was possible to verify the SRSI's ability to differentiate the scores of the “honest” condition and the “simulation” condition, since there were statistically significant differences between the means obtained in them, with the corresponding effect size being large. In the same sense, the SRSI proved to be able to discriminate the responses of inmates from non-inmates (control sample), scoring the former significantly more than the latter, on the scales and in most subscales of the SRSI.The implications of this study in a prison context are analyzed and recommendations for future investigations are presented.
A adoção de estilos de resposta enviesados, como a simulação e exagero de sintomas psicopatológicos, por parte de um examinando, constitui uma ameaça à validade dos resultados de uma avaliação (neuro)psicológica, especialmente em contextos forenses, nos quais ganhos secundários têm elevada probabilidade de manifestação. Os Testes de Validade de Sintomas (TVS) têm como objetivo detetar a presença de tais estilos de resposta/ comportamentos, viabilizando, desse modo, interpretações mais fidedignas acerca do perfil de funcionamento psicológico real de um indivíduo. A presente investigação procurou dar continuidade ao processo de validação do Self-Report Symptom Inventory (SRSI; Merten et al., 2016) no contexto prisional português. Para a concretização do referido objetivo, foi administrado a uma amostra prisional de 100 reclusos, com idades compreendidas entre os 18 e os 72 anos, um protocolo de avaliação constituído pelos seguintes instrumentos: o SRSI, o Structured Inventory of Malingered Symptomatology (SIMS; Smith & Burger, 1997; Widows & Smith, 2005; versão portuguesa: Simões, Almiro, Mota, et al., 2017), a Escala de Validade de Sintomas – Versão 2 (EVS-2; Simões, Almiro, Nunes, et al., 2017; Cunha, 2011) e o Brief Symptom Inventory (BSI; Derogatis, 1982; versão portuguesa: Canavarro, 2007). O presente estudo de validação do SRSI recorreu ao design de simulação análogo, numa vertente intra-sujeitos. Desta forma, todos os participantes responderam ao SRSI em dois momentos contíguos: de forma honesta (condição “honesta”) e de acordo com instruções (cover story – condição de ”simulação”), elaboradas considerando recomendações da literatura científica e orientadas para maximizar a possibilidade de generalização dos dados.No que concerne aos resultados, os estudos de fiabilidade (consistência interna das pontuações no SRSI) indicam valores elevados de alfa de Cronbach para ambas as escalas, em ambas as condições. No âmbito dos estudos de validade convergente, é de referir que o SRSI contém validade com outros TVS (e.g., SIMS e EVS-2), já que os resultados evidenciaram a existência de relações positivas, elevadas e significativas entre a escala de Pseudo-sintomas do SRSI e o resultado total do SIMS e da EVS-2 (instrumentos que medem constructos teóricos semelhantes). No mesmo sentido, e de acordo com o esperado, foram encontradas correlações positivas, moderadas e/ou fortes entre a escala de Sintomas Genuínos e os índices globais do BSI (instrumento que mede a presença de psicopatologia genuína). No domínio da validade discriminante, esperavam-se correlações não significativas, reduzidas ou nulas entre a escala Pseudo-sintomas do SRSI e o BSI, uma vez que mensuram constructos não sobrepostos. Porém, os resultados sugeriram que a escala Pseudo-sintomas se revelou igualmente sensível à presença de psicopatologia, uma vez que se observaram correlações moderadas e fortes entre a mesma e os índices globais do BSI – aspeto sinalizador de ausência de validade discriminante. Por sua vez, e de acordo com o esperado, foram observadas correlações positivas reduzidas entre o total da escala Sintomas Genuínos (na condição “honesta”) e o total da escala Pseudo-sintomas (na condição “simulação”). Ainda no que concerne à validade discriminante, foi possível verificar a capacidade do SRSI, diferenciar as pontuações da condição “honesta” e da condição “simulação”, na medida em que se observaram diferenças estatisticamente significativas entre as médias obtidas nas mesmas, sendo o tamanho de efeito correspondente grande. No mesmo sentido, o SRSI revelou ser capaz de discriminar as respostas dos participantes reclusos de participantes não-reclusos (amostra de controlo), pontuando os primeiros significativamente mais do que os segundos, nas escalas e na maioria das subescalas do SRSI.São analisadas as implicações do presente estudo em contexto prisional e apresentadas recomendações para futuras investigações.
Huang, Chia-Ling, i 黃佳玲. "Using Games and Simulations to Overcome Two Obstacles that Block the Introduction of CCPM to PM Society and Validate its Effectiveness". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/39345736248086803135.
Pełny tekst źródła國立交通大學
工業工程與管理學系
99
Since 1997, the Critical Chain Project Management method (CCPM) has received considerable attention. Hundreds of successful CCPM cases have achieved highly reliable on-time delivery (OTD) with short project lead-time (PLT) in multi-project environments. However, two obstacles have remained, blocking the introduction of CCPM to project management (PM) society. The first has been addressed by PM practitioners, who have been less than confident that OTD and PLT can be significantly improved by simply changing the way to manage multi-projects. The second is from academia: some scholars have claimed that the ideas of CCPM are not new and are of no substantial contribution to PMBOK. In this study, we first used multi-project management games to overcome the first obstacle. A comparative study of CCPM and PERT/CPM planning methods, excluding bad human behaviors, was then conducted to overcome the second obstacle. Results show that: (1) the “mode of managing multi-projects” was the root cause, and changing the mode of managing multi-project could significantly improve OTD and PLT; (2) in terms of mean project time, CCPM is not significantly better than PERT/CPM. However, in terms of plan reliability, CCPM achieves higher than PERT and CPM. This is due to a CCPM logistical change that generates a more reasonable and reliable project plan than do the PERT/CPM methods.
"Use of Machine Learning Algorithms to Propose a New Methodology to Conduct, Critique and Validate Urban Scale Building Energy Modeling". Master's thesis, 2017. http://hdl.handle.net/2286/R.I.45561.
Pełny tekst źródłaDissertation/Thesis
Masters Thesis Architecture 2017
Almeida, Carolina Duarte de. "Estudos com design de simulação análogo em Testes de Validade de Sintomas (TVS): Uma revisão da literatura". Master's thesis, 2020. http://hdl.handle.net/10316/94483.
Pełny tekst źródłaA área da avaliação da validade de sintomas tem assumido uma importância acrescida no domínio da avaliação psicológica. Em contextos forenses, a evidência dos ganhos secundários alcançáveis com a simulação ou exagero de sintomas psicopatológicos e a prevalência deste tipo de comportamentos por parte dos avaliados, constitui um problema relevante. Os Testes de Validade de Sintomas (TVS) têm como objetivo detetar a presença de comportamentos de simulação ou exagero de sintomas permitindo, aos profissionais de saúde metal, realizar interpretações mais fidedignas dos resultados obtidos através de uma avaliação psicológica, de forma a refletir o funcionamento psicológico real do sujeito.Neste âmbito, releva-se a importância das investigações na área, para que os clínicos consigam recorrer à utilização dos TVS com confiança nos seus resultados. Uma das mais comuns metodologias de investigação na simulação de sintomas é o design de simulação análogo, no qual são formados grupos de controlo e de simulação instruída, para estudar a identificação e controlo dos instrumentos ao comportamento referido. No entanto, esta metodologia encontra-se muito associada a críticas relativas à sua fraca validade externa, devido às diferenças existentes entre as condições experimentais e as condições da vida real, nas quais esses comportamentos podem estar presentes. Neste sentido, acresce a importância de serem respeitados certos padrões de construção metodológica nas investigações realizadas, de forma a que as conclusões retiradas sejam generalizadas com confiança. Assim, na presente dissertação, é realizada uma revisão dos estudos existentes com recurso ao design de simulação análogo, com destaque para os contextos forenses (criminal e médico-legal). Considerando o número reduzido de investigações encontradas nestes contextos, são, adicionalmente, apresentados estudos em contextos comunitários. As conclusões retiradas indicam que são, ainda, cometidos diversos erros associados ao desenvolvimento das instruções de simulação, o que coloca em risco a fiabilidade com que são interpretados os comportamentos de simulação reproduzidos pelos “simuladores experimentais”. São feitas recomendações de natureza metodológica orientadas para assegurar um maior grau de representatividade e generalização dos resultados obtidos neste design de simulação análogo para os contextos reais.
Symptom validity assessment is an area becoming increasingly important in the field of psychological assessment. In forensic contexts, the presence of evident secondary gains achievable with malingering or symptom overreporting on the part of the evaluated, and the prevalence of this kind of performance, constitutes a relevant problem. Symptom Validity Tests (SVT) aim to detect the presence of malingered symptomatology, allowing mental health professionals to produce more reliable interpretations of the results obtained through a psychological assessment, in order to reflect the subject’s real psychological functioning.Therefore, the attainment of investigations in the area is highlighted, to help clinicians to resort to the use SVT with confidence in their results. One of the most common investigation methodologies to evaluate the identification and control of malingering by the SVT, is the analogue simulation design, according to which participants are allocated to control or simulation conditions. Nevertheless, this methodology is closely associated with criticisms regarding its weak external validity, due to the differences between the experimental and real-life conditions. Thus, investigators should respect certain methodological standards, so that the conclusions drawn from the investigations are generalized with confidence.In the present dissertation, a review of the existing studies using analogue simulation design is carried out. Emphasis is placed on forensic (criminal and medico-legal) contexts, with addition of community contexts, due to the reduced number of investigations in the first ones. The conclusions drawn indicate several errors associated with the development of simulation instructions, which lays risk in the reliability with which the simulation behaviours reproduced by experimental simulators are interpreted. Methodological recommendations oriented to ensure a higher degree of representativeness and generalization of the results obtained in this analog simulation design are made.
Domingues, Margarida Vasconcelos. "Self-Report Symptom Inventory (SRSI): Validação através de um estudo de simulação análogo". Master's thesis, 2019. http://hdl.handle.net/10316/86698.
Pełny tekst źródłaMalingering of symptoms is a very important research problem in forensic neuropsychological evaluation. In this context, examining the credibility of the subjects' reports led to the development of SVTs (Symptom Validity Tests), tests focused on the detection of the simulation and exaggeration of symptoms. The methodology associated with the analog simulation model is widely used in the internal validation of instruments.The current research focuses on the adaptation and validation of the Self-Report Symptom Inventory (SRSI; Merten et al., 2016) to European Portuguese using the analog simulation model. The SRSI is a self-reported symptom instrument that has two main scales of Genuine Symptoms and Pseudosymptoms where several clinical subscales are integrated. For this study, the SRSI was administered twice to a sample of 70 undergraduate students, a first time where they were instructed to respond honestly and second time where they were instructured to simulate symptoms according to a given scenario. This sample also answered to the SIMS (Structured Inventory of Malingered Symptomatology) instrument used as an external criterion for comparison and validation of the SRSI.The results obtained in the “honest” and in the “malingering” condition for the SRSI subscales and scales revealed Cronbach alphas ranging from "unacceptable" to "very good", with no present difference between the two conditions. The results demonstrated an evident increase in the report of symptoms between the “honest” condition and the “malingering” condition. Significant moderate and strong correlations were found between the subscales of Genuine Symptoms and Pseudosymptoms of the SRSI “honest” condition with the SIMS scales, as well as very strong correlations between the totals of Genuine Symptoms and Pseudosymptoms and the total score in the SIMS.In general, the results support the use of SRSI as a complementary tool to other SVTs, but they also emphasize the need for further studies integrating different samples and different research methods (e.g. subjects with real disorders and formal diagnosis).
A credibilidade dos relatos dos sujeitos e a simulação e/ou exagero de sintomas constituem problemas importantes da avaliação e da investigação neuropsicológica forense. Os Testes de Validade de Sintomas (TVS) são um tipo de instrumentos especificamente desenvolvido para a avaliação da simulação e/ou exagero de sintomas psicopatológicos. Neste contexto, o design de simulação análogo (analog simulation design) constitui uma metodologia muito utilizada na validação interna destes instrumentos.A presente investigação centra-se na validação do Self-Report Symptom Inventory (SRSI; Merten et al., 2016) para o português europeu através do modelo de simulação análogo. O SRSI é um instrumento de autorrelato de sintomas (TVS) que conta com duas escalas principais (Sintomas Genuínos e de Pseudo-Sintomas) que integram várias subescalas clínicas. Neste estudo foi utilizada uma amostra de 70 estudantes universitários a quem foi administrado o SRSI duas vezes. Na primeira aplicação, os sujeitos foram instruídos a responder de forma honesta. Na segunda administração os sujeitos foram convidados a responder de forma simulada de acordo com um cenário previamente fornecido (Cenário “Ansiedade” ou Cenário “Dores”). A referida amostra respondeu ainda ao SIMS (Structured Inventory of Malingered Symptomatology), um outro TVS já validado para a população portuguesa, aqui utilizado como critério externo de comparação e validação das pontuações no SRSI.Os resultados da consistência interna obtidos na condição “honesta” e na condição “simulação” para as subescalas e escalas do SRSI variam entre “inaceitáveis” e “muito bons” não se observando muitas diferenças entre as duas condições. De acordo com o esperado, os resultados demonstraram um incremento evidente na comunicação do número de sintomas da condição “honesta” para a condição “simulação”. Foram observadas correlações significativas moderadas e fortes entre as subescalas de Sintomas Genuínos e de Pseudo-Sintomas do SRSI condição “honesta” com as escalas do SIMS, e também correlações muito fortes entre os totais de Sintomas Genuínos e de Pseudo-Sintomas e a pontuação total no SIMS.Os resultados apoiam a utilização do SRSI como instrumento potencialmente útil a incluir nos protocolos de avaliação neuropsicológica forense, num registo complementar a outros TVS, mas sublinham igualmente a necessidade de novos estudos que integrem diferentes amostras e diferentes métodos de investigação (e.g., sujeitos com perturbações reais objeto de diagnóstico formal, examinados em contextos clínicos e forenses).
Pinheiro, Débora Alexandra Silva. "Self-Report Symptom Inventory (SRSI): Estudo de validação em uma amostra de reclusos". Master's thesis, 2019. http://hdl.handle.net/10316/86471.
Pełny tekst źródłaA avaliação da simulação e exagero de sintomas é uma tarefa básica em avaliação (neuro)psicológica especialmente em contextos forenses nos quais o ganho secundário pode estar presente. A utilização de Testes de Validade de Sintomas (TVS) constitui uma metodologia recente e promissora para este mesmo fim.Este estudo consiste na validação do Self-Report Symptom Inventory (SRSI; Merten et al., 2016) para a população portuguesa em contexto forense. O SRSI é um novo instrumento destinado a avaliar a credibilidade dos sintomas relatados, constuituido não só por sintomas raros ou atípicos (Pseudo-sintomas), mas também por Sintomas Genuínos. Para tal foi recolhida uma amostra prisional de 85 sujeitos com idades compreendidas entre os 22 e os 65 anos. Para este estudo, o protocolo de avaliação incluiu para além do SRSI o Structured Inventory of Malingered Symptomatology (SIMS; Smith & Burger, 1997; Widows & Smith, 2005; versão portuguesa Simões, et al., 2017) e testes de avaliação de psicopatologias específicas como Inventário de Depressão de Beck (BDI-II; Beck, Steer & Clark, 1996; versão portuguesa validada por Oliveira-Brochado, Simões, & Paúl, 2014); Inventário de Ansiedade Estado-Traço (STAI Forma Y; Spielberger et al., 1983; validado para a população portuguesa por Silva, 2003) e o Inventário Resumido da Dor (BPI; Ferreira-Valente, Pais-Ribeiro & Jensen, 2009), com os quais foram realizados estudos de validade. Os resultados evidenciaram a existência de relações positivas e significativas entre a Escala de Pseusosintomas do SRSI e o resultado total do SIMS, instrumentos que avaliam genericamente os mesmos constructos (simulação, exagero de sintomas, respostas enviesadas negativas). O mesmo se verifica na análise das correlações entre os resultados totais dos restantes instrumentos incluídos no protocolo e a Escala e subescalas de Sintomas Genuínos do SRSI. No entanto, verificou-se que um outro estilo de resposta (a desejabilidade social) não influenciava os resultados nas Escalas e subescalas do SRSI.Explorámos ainda a existência de efeito de diversas variáveis criminais e sociodemográficas nos resultados do SRSI. Apenas foi identificado impacto significativo da variável “toma da medicação” no resultado da Escala de Pseudo-sintomas do SRSI, as restantes variáveis não apresentaram influências significativas nos resultados. Relativamente à fiabilidade, os resultados de consistência interna obtidos para o SRSI foram promissores tanto para a Escala de Sintomas Genuínos (α=.802) como para a Escala de Pseudo-sintomas (α=.806).São analisadas as implicações do presente estudo em contexto prisional e apresentadas recomendações para futuros estudos.
The evaluation of the simulation and exaggeration of symptoms is a basic task in (neuro)psychological evaluation especially in forensic contexts in which the secondary gain may be present. The use of Symptom Validity Testing (TVS) is a recent and promising methodology for this purpose.This study consists of the validation of the Self-Report Symptom Inventory (SRSI; Merten et al., 2016) for the Portuguese population in a forensic context. The SRSI is a new instrument to evaluate the credibility of the symptoms reported, not only for rare or atypical symptoms (Pseudo-sintomas), but also for Genuine Symptoms. For this purpose, a prison sample of 85 subjects between the ages of 22 and 65 was collected. For this study, the evaluation protocol included in addition to SRSI the Structured Inventory of Malingered Symptomatology (SIMS; Smith & Burger, 1997; Widows & Smith, 2005; Portuguese version Simões, et al., 2017) and evaluation tests of specific psychopathologies such as Beck Depression Inventory (BDI-II; Beck, Steer & Clark, 1996; Portuguese version validated by Oliveira-Brochado, Simões, & Paúl, 2014); State-Trait Anxiety Inventory (STAI Forma Y, Spielberger et al., 1983, validated for the Portuguese population by Silva, 2003) and the Brief Inventory of Pain (BPI; Ferreira-Valente, Pais-Ribeiro & Jensen, 2009), with which validity studies were carried out. The results evidenced the existence of positive and significant relationships between the SRSI Pseusesintomas Scale and the total SIMS result, instruments that generally evaluate the same constructs (simulation, exaggeration of symptoms, negative bias responses). The same is true in the analysis of the correlations between the total results of the other instruments included in the protocol and the SCSI Scale and subscales of Genuine Symptoms. However, it was found that another style of response (social desirability) did not influence the results in SRSI scales and subscales.We also investigated the existence of an effect of several criminal and sociodemographic variables on SRSI results. Only a significant impact of the variable "medication intake" on the SRSI Pseudosymptomatic Scale result was found, the remaining variables did not present significant influence on the results.Regarding reliability, the internal consistency results obtained for SRSI were promising for both the Genuine Symptom Scale (α = .802) and the Pseudosymptomatic Scale (α = .806).The implications of the present study in a prison context are analyzed and recommendations for future studies are presented.