Dissertations / Theses: 'Modelo TAR'

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Chun, Winston Seung Hyun. "Estrutura a termo de taxa de juros brasileira: investigando a presença de não linearidade." reponame:Repositório Institucional do FGV, 2011. http://hdl.handle.net/10438/8585.

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Esta dissertação tem com objetivo avaliar uma das implicações da hipótese de expectativas para a estrutura a termo de taxa de juros brasileira. Utilizando testes lineares tradicionais e através da reprodução de testes não lineares TAR de Enders e Granger (1998) e ESTAR Kapetanios e Shin (2003) conclui-se que a hipótese de expectativas não é totalmente válida para a ETTJ do Brasil, além disso, são encontradas evidências de não linearidade nas séries de spreads que demandam mais pesquisa sobre o assunto.
This dissertation has the aim to evaluate one of the implications of expectation hypothesis in Brazilian term structure of interests. Using traditional linear tests and through the reproduction of nonlinear Threshold Autoregressive (TAR) tests of Enders and Granger (1998) and Exponential Smooth Transition Autoregressive (ESTAR) of Kapetanios and Shin (2003) the conclusion is that expectation hypothesis is not totally valid for Brazil, besides that, some evidences of non-linearity in spreads series were found then more research is needed on the subject.

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Oliveira, Aline de. "Variáveis que influenciam o consumidor em relação ao uso dos chatbots." Master's thesis, Instituto Superior de Economia e Gestão, 2018. http://hdl.handle.net/10400.5/18164.

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Mestrado em Marketing
As empresas frequentemente buscam moldar a evolução das aplicações tecnológicas e estão cada vez mais utilizando chatbots e inteligência artificial para se comunicar com os clientes, resolver dúvidas, problemas de atendimento, procurar informações, comprar produtos e serviços, reservar hotéis, fazer perguntas às empresas, entre outros. Sendo assim, o objetivo desta pesquisa consiste em explorar diferentes variáveis externas e do Modelo TAM para ver se influenciam o consumidor em relação ao uso dos chatbots pelas empresas. Para coletar os dados quantitativos foi realizado um questionário online e 235 respostas foram analisadas com o programa SPSS. De 16 hipóteses, obteve-se 12 hipóteses confirmadas e aceitas, sendo possível afirmar que os consumidores estão dispostos a adotar e utilizar chatbots para se comunicar com as empresas.
Companies often seek to shape the evolution of technology applications and are increasingly using chatbots and artificial intelligence to communicate with customers, solve questions, service issues, look for information, buy products and services, book hotels, ask business questions. Therefore, the objective of this research is to explore different external variables and the Model TAM that influence the consumer in relation to the use of chatbots by companies. To collect the quantitative data, an online questionnaire was performed and 235 responses were analyzed with the SPSS program. Of the 16 hypotheses, 12 hypotheses were confirmed and accepted, and it is possible to affirm that consumers are willing to adopt and use chatbots to communicate with companies.
info:eu-repo/semantics/publishedVersion

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Santos, Alan Vasconcelos. "AnÃlise de modelos de sÃries temporais para a previsÃo mensal do imposto de renda." Universidade Federal do CearÃ, 2003. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1463.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico
O presente trabalho objetiva realizar previsÃes mensais da sÃrie do imposto de renda para o perÃodo de 2002. A metodologia empregada para alcanÃar essa finalidade consiste na utilizaÃÃo da tÃcnica de combinaÃÃo de previsÃes. Especificamente, combinam-se os resultados de previsÃo advindos de trÃs mÃtodos diferentes: tÃcnica do alisamento exponencial, metodologia de Box-Jenkins (modelos ARIMA) e modelos vetoriais de correÃÃo de erro. Obtida a previsÃo final, compara-se este resultado com os valores reais observados da sÃrie do imposto de renda para o ano de 2002 a fim de verificar o desempenho e a acurÃcia do modelo.
The main objective of this work was to generate predictions, at a monthly frequency, from 1990 to 2001, of income tax revenue. The methodology used was the one of forecast combining. Specifically, exponential smoothing, an ARIMA and VAR with error correction models were pooled to obtain final prediction. Ex-post forecast errors were used to test the performance of the model. Results indicated that combining performs better than individual models, and errors are in an acceptable interval for this type of prediction.

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Liu, S. "Plasma gas cleaning processes for the conversion of model tar from biomass gasification." Thesis, University of Liverpool, 2018. http://livrepository.liverpool.ac.uk/3021510/.

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Pereira, JosÃ Ribamar. "PrevisÃo de receita do ISSQN de Teresina: uma abordagem com sÃries temporais." Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1729.

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Universidade Federal do CearÃ
Neste estudo, pretende-se determinar um modelo de previsÃo mensal de curto prazo para a receita de ISSQN de Teresina. Para evidenciar este propÃsito servirÃo de suporte matemÃtico os modelos VAR e Box-Jenkins, a partir de sÃries histÃricas concernentes ao perÃodo de janeiro de 2002 a dezembro de 2006. ApÃs a estimaÃÃo dos modelos, propÃe-se um diagnÃstico para mensurar a capacidade inicialmente preditiva. Dentre os modelos manipulados temos o SARIMA (12,1,1)(0,0,12) o qual antecipadamente demonstrou ser mais robusto em relaÃÃo ao modelo VAR. Oportunamente Ã discussÃo de outras nuances internas ou Ã margem do trabalho, conclui-se que, o modelo com sÃries temporais, em funÃÃo de sua capacidade preditiva, pode se transformar em um instrumental consistente com vistas ao incremento da arrecadaÃÃo do ISSQN da Prefeitura de Teresina.
In this study, It is intended to determine a short-run monthly forecasting model for the ISSQN of Teresina city. In order for this purpose to be clear, the models VAR and Box-Jenkins will be of mathematical support, from historical series concerning the period of January 2002 to December 2006. After the estimation of the models, it is proposed a diagnosis to measure the initially predictive capacity. Among the models manipulated, we have SARIMA (12,1,1)(0,0,12), which has resulted most robust in advance concerning the VAR model. Propitiously to other internal or marginal nuances to the study, it is concluded, preliminarily, that the time series model due to its predictive capacity can become a consistent instrument targeting at the augment of the ISSQN collecting of Teresina City Administration.

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Keval, Luis Amirali Dias. "Management consulting labs: project TAP." Master's thesis, NSBE - UNL, 2011. http://hdl.handle.net/10362/10082.

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A Work Project, presented as part of the requirements for the Award of a Masters Degree in Management from the NOVA – School of Business and Economics
The purpose of this study was to investigate the impact on revenues and to elaborate some high level strategies for TAP given future full establishment of a recent competitor of the commercial airline industry in Lisbon. The analysis was done through an analytical model to determine past/present impact and from that to stipulate the future impact on revenues. Several surveys were conducted to identify passengers’ key decision factors in order to establish reasons for churn and retention. Based on the result five strategic guidelines were designed to minimize the impact on revenues.

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Sridhar, Rajesh. "Chemistry models for major gas species estimation and tar prediction in fluidized bed biomass gasification." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104564.

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Thesis: S.M., Massachusetts Institute of Technology, Computation for Design and Optimization Program, 2016.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 133-140).
The present work deals with the process of fluidized bed biomass gasification (FBBG), which is the thermochemical conversion of solid biomass into combustible synthetic gas using a fluidized bed. Fluidized bed gasifiers encounter high tar concentrations at the gasifier outlet necessitating expensive downstream cleaning equipment. Apart from the complex chemical pathways involved, tar production is also strongly dependent on the transport processes occurring inside the gasifier. Hence, the development of a detailed model to predict the variation of tar production under different operating conditions needs to include two important considerations: a comprehensive chemical kinetic sub-model and a detailed hydrodynamic sub-model. However, due to the huge computational expense associated with such a detailed simulation coupling the complex chemistry and hydrodynamics, there is a need to develop simplified models on both fronts. The first part of this work presents a detailed discussion on the chemistry models for biomass gasification: after introducing the existing state-of-the-art reaction mechanisms (both detailed and compact), two new global chemistry models, incorporating a global primary tar cracking reaction, for air-blown gasification and steam-blown gasification conditions are developed. The major gas species and total tar concentrations predicted using the global models in reactor network simulations of the gasifiers are compared with the corresponding predictions obtained using the detailed CRECK mechanism for biomass gasification, as well as with the available experimental observations. On the hydrodynamics front, an improved reactor network model based on the two-phase theory has been developed to better capture the mixing inhomogeneities in the bubbling fluidized bed, including mass transfer considerations between the bubble and emulsion phases. Finally, the predictions of various tar class concentrations and major gas species concentrations, obtained using the improved reactor network model in conjunction with the detailed CRECK kinetic reaction mechanism, for both air-blown gasification and steam gasification, are presented. Key words: Biomass gasification, Fluidized beds, Chemical reactor network modeling, chemical kinetics, chemistry mechanism reduction, Global chemistry model
by Rajesh Sridhar.
S.M.

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Eckardt, Sanna, and Johanna Knief. "Vem tar hand om barnet? : En studie av mäns uttag av ersättning för vård av sjukt barn." Thesis, Uppsala University, Department of Economics, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7015.

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Ett av målen för svensk familjepolitik är att utjämna den sneda fördelningen i uttaget av familjeförsäkringen. Inom familjeförsäkringen hittas segmentet för den tillfälliga föräldrapenningen och i denna, ersättningen för vård av sjukt barn. Två modeller, med olika antal variabler, används för att åskådliggöra sambandet mellan andel barn som bor i traditionell kärnfamilj och andel nettodagar män tar ut för vård av sjukt barn. Resultatet påvisar att uttaget av nettodagar könen emellan är jämnare fördelat inom gruppen traditionell kärnfamilj än för den totala gruppen föräldrar. I Sverige lever idag omkring 78 procent av barn i åldern ett till elva år inom den traditionella kärnfamiljen.

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Olofsson, Hannah, and Viktor Nordkvist. "En ledarskapsmodell på ett företag : Hur gemensam kompetens tar sig uttryck." Thesis, Uppsala universitet, Institutionen för pedagogik, didaktik och utbildningsstudier, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-414377.

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Studien hade som syfte att studera hur ledare inom ett specifikt företag uppfattar sitt eget ledarskap vilket analyseras utifrån ett teoretiskt perspektiv om värdebaserat ledarskap. Syftet operationaliseras genom att behandla frågeställningarna hur företagets ledarna uppfattar sitt eget ledarskap utifrån ledarskapsmodellen på företaget samt hur värdebaserat ledarskap tar sig i uttryck på företaget. Studiens empiri samlades in genom kvalitativa, internetunderstödda, semistrukturerade intervjuer. Urvalet bestod av åtta ledare på företaget och var i första steget ett bekvämlighetsurval som transformerades till ett snöbollsurval. Företaget är en del av en global koncern inom persontransport där vi studerade verksamheten i Sverige. Intervjuerna transkriberades och materialet kodades utifrån temana egen uppfattning av ledarskap, ledarskapsmodellen generellt, specifika förmågor från ledarskapsmodellen och användningsområden för ledarskapsmodellen. Tematiseringen i resultat och analys utgick från studiens två frågeställningar. Resultatet visade att ledarnas egna uppfattningar om sitt ledarskap överensstämde i stort med egenskaperna i ledarskapsmodellen samt att värdebaserat ledarskap framförallt tar sig uttryck genom självutveckling och medarbetarsamtal. Empirin påvisade att ledarskapsmodellen påverkar beteenden hos ledarna eftersom respondenternas utsagor om sitt eget ledarskap härleds till egenskaperna i modellen. Värdebaserat ledarskap tar sig uttryck på företaget genom företagets ledarskapsmodell, ledarnas utsagor och hur de använder sig av modellen i olika kontexter.
The purpose of this study was to examine how leaders within a specific company perceive their own leadership, which is analyzed from a theoretical perspective on values-based leadership. The purpose is operationalized by addressing the issues of how the company's leaders perceive their own leadership based on the leadership model of the company and how values-based leadership manifests itself within the company. The study's empirical data were collected through qualitative, internet-supported, semi-structured interviews. The selection consisted of eight managers at the company and was in it’s first step a convenience sampling that transformed into a chain sampling. The company is part of a multinational corporate group active in the passenger transport industry where the study focused on the business in Sweden. The interviews were transcribed, and the material was coded on the basis of the managers perceptions of leadership, the leadership model in general, specific traits in the leadership model, and areas of use for the leadership model. The thematization of results and analysis was based on the study's two issues. The result showed that the managers own perceptions of their leadership were in line with the characteristics of the leadership model and that values-based leadership was expressed mainly through self-development and staff appraisal. The data demonstrated that the leadership model influences the behavior of leaders because leaders' statements about their own leadership are derived from the characteristics of the model. Values-based leadership is expressed by the company through the company's leadership model, leaders' statements and how they use the model in different contexts.

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Penna, Christiano Modesto. "Crescimento econÃmico via investimentos em capital: evidencias empÃricas para o Brasil." Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1394.

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Neste trabalho fica evidente que existe uma relaÃÃo nÃo linear entre a taxa de formaÃÃo bruta de capital fixo e a taxa de crescimento econÃmico na economia brasileira e, devido a essa nÃo linearidade, o teste de prediÃÃes do modelo AK e neoclÃssico proposto por Jones (1995) passa a ser inconclusivo, pois existe espaÃo para as prediÃÃes de ambos os modelos. Nosso modelo economÃtrico indica que, teoricamente, a produtividade marginal do capital se modifica de acordo com uma taxa de crescimento indicada pelo parÃmetro threshold. Essa modificaÃÃo pode aparentemente ser explicada devido Ã modificaÃÃo do coeficiente de elasticidade de substituiÃÃo entre capital e trabalho, ficando aqui uma proposta de novas investigaÃÃes. Ao tratarmos de polÃticas pÃblicas, constata-se que, por mais que se amplie a taxa de formaÃÃo bruta de capital fixo chegaremos, no mÃximo, ao âcatch-upâ do crescimento do PIB das economias de renda mÃdia baixa e do crescimento econÃmico dos paÃses do leste asiÃtico e do PacÃfico. O trabalho tambÃm sugere que o montante de recursos necessÃrio para se concluir tais âcatch-upsâ Ã da ordem de R$ 786 bilhÃes.
In this work it is evident that a not linear relation exists enters the tax of rude formation of capital fixture and the tax of economic growth in Brazilian economy e, which had to this non linearity, the test of predictions of model AK and neoclÃssico considered for Jones (1995) starts to be inconclusivo, therefore exists space for the predictions of both the models. Our econometrical model indicates that, theoretically, the productivity delinquent of the capital if modifies a tax of growth in accordance with indicated for the parameter threshold. This modification can pparently be explained due to modification of the coefficient of elasticity of substitution between capital and work, being here a proposal of new inquiries. When dealing with public politics, one evidences that, no matter how hard if extends the tax of rude formation of capital fixture will arrive, in the maximum, to âcatch-upâ of the growth of the GIP of the economies of average income decrease and of the economic growth of the countries of the Asian east and the Pacific. The work also suggests that the sum of resources necessary to conclude such âcatch-upsâ is of the order of R$ 786 billion.

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JOE, MIJEOM. "Stage-Structured Tag-Return and Capture-Recapture Models." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20010412-160147.

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Ecologists and conservation biologists have had an increasing interest in landscapeecology, fragmentation and meta-population structures and dynamics for endangered or threatened species of wildlife (Nichols et al. 1992).They have realized the need for parameter estimates to use in the multi-state models;and have tried estimation of transitionprobabilities among stages using tag-return and capture-recapture models. Thesetransition probabilities are composed of survival and movement rates andcan only be estimated separately when an additional assumption is made(Brownie et al. 1993) that movement occurs at the end of theinterval between time + 1.We generalize this workto allow different movement patterns in the intervalfor multiple tag-recovery and capture-recapture experiments.

With methods of separating survival and movement rates in multi-state tag-return and capture-recapture models,we develop multi-state fishery tag return models with potential forfisheries that have multiple sites or patches with movement possible between sites. We build on models developed by Brownie et al. (1985), Pollock et al. (1991, 1995), Hoenig et al. (1998 a, b), and Hearn et al. (1998) on twice-a-year tagging for single state models.These methods allow the estimation of patch-specific natural and fishingmortality rates and movement rates between patches.

We then develop multi-state fishery tag-return and capture-recapture models with potential forfisheries that have multiple sites or patches withmovement possible between sites when taggingtakes place twice a year.These methods allow the estimation of patch-specific reporting, natural and fishing mortality rates, and movement rates between patcheswith movement time following a uniform distribution for two special cases: (1) a two-site tag-return fisheries model;(2) a two-site model with capture-recapture catch and releasesampling in a marine reserve closed to regular fishing and the more usual tag-return sampling in the fishery area, since marine reserves which provide a refuge from fishing are gaining in popularity as a tool of fisheries management, but their effectiveness needs to beevaluated. We present small simulation studies andcompare the Relative Bias and Relative Standard Errors (RES) of estimatesas well as the correlations between estimates.

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Coogle, John J. "Applying Hierarchical Tag-Topic Models to Stack Overflow." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/5713.

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Stack Overflow is a question and answer site for programming questions. It has become one of the most widely used resources for programmers, with many programmers accessing the site multiple times per day. A threat to the continued success of Stack Overflow is the ability to efficiently search the site. Existing research suggests that the inability to find certain questions results inunanswered questions, long delays in answering questions, or questions which are unable to be found by future visitors to the site. Further research suggests that questions with poor tag quality are particularly vulnerable to these issues.In this thesis, two approaches are considered for improving tag quality and search efficiency: automatic tag recommendations for question authors, and organizing the existing set of tags in a hierarchy from general to specific for Stack Overflow readers. A hierarchical organization is proposed for it's ability to assist exploratory searches of the site.L2H, a hierarchical tag topic model, is a particularly interesting solution to these approaches because it can address both approaches with the same model. L2H is evaluated in detail on several proposed evaluation criteria to gauge it's fitness for addressing these search challenges on Stack Overflow.

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Ferrer, Pablo Gustavo Silva. "SISTEMA DE APOIO À DECISÃO EM TECNOLOGIA DE APLICAÇÃO DE PRECISÃO (SISD-TAP) PARA A OTIMIZAÇÃO DA GESTÃO DE PRAGAS NAS CULTURAS." Universidade Federal de Santa Maria, 2014. http://repositorio.ufsm.br/handle/1/3626.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico
Due to the large number and complexity of factors influencing the study of efficiency and efficacy of pesticide application technology, it becomes difficult to develop multivariate methods, to define indicators of interdisciplinary and integrative manner, to control phytosanitary crops. This work conducted with the objective to develop a Decision Support System in Precision Application Technology (SISD-TAP). Which can form simple, practical and effective, providing alternatives and / or scenarios: Normalized (application volume Producer DPRD, Q1), Efficient Biologically (application volume biologically Efficient (DBE, Q2) and Climate / Target (application volume critical DCR, Q3) to the farmer for management control of pests and diseases in your crops. Based on criteria of sustainability and leveraging the vast amounts of information from various surveys and tactical models developed over more than five decades of research in the area of pest management and application technology. The SISD-TAP (Alpha version), allows the analysis of factors associated with cultivation, agro climate, pests, machines and equipment, technology implementation and environmental aspects socioeconomic, to decide on: (1) When is the best time of the application, (2) What are your operational parameters, (3) the efficiency of application requirements and (4) Which will be the implementation costs and environmental hazards expected. Directed with the purpose to enable the optimization of pest control, and promote the adoption of modern management of agribusiness (precision farming and/or management specific sites), with the use of innovative agricultural mechanization (for example systems intelligent sensors and robotics) in order to improve in production.
Devido ao grande número e à complexidade dos fatores que influenciam o estudo da eficiência e eficácia da tecnologia de aplicação de fitossanitários, torna-se realmente difícil desenvolver métodos multifatoriais para a definição de indicadores de forma interdisciplinar e integradora do controle fitossanitário. Nesse sentido, este trabalho foi realizado com o objetivo de desenvolver um Sistema de Apoio a Decisões em Tecnologia de Aplicação de Precisão (SISD-TAP) que possa, de forma simples, prática e efetiva, prover o produtor agrícola de alternativas e/ou cenários: Normalizado (Volume de aplicação produtor DPrd, Q1), Biologicamente Eficiente (Volume de aplicação Biologicamente Eficiente DBE, Q2) e Clima/Alvo (Volume de aplicação Crítica DCR, Q3), para a gestão do controle das pragas e doenças dos sistemas usados. Assim, este trabalho é baseado em critérios de sustentabilidade e aproveita a vasta quantidade de informação das diversas pesquisas e modelos táticos desenvolvidos ao longo de mais de cinco décadas de estudos, na área de manejo de pragas e tecnologia de aplicação O SISD-TAP (versão Alpha) permite a análise dos fatores associados ao cultivo, ao clima, às pragas, às máquinas e aos equipamentos, à tecnologia de aplicação e aos aspectos socioeconômicos e ambientais para decidir sobre: (1) Qual é o melhor momento da aplicação, (2) Quais seus parâmetros operacionais, (3) Qual a eficiência de aplicação requerida e (4) Quais serão os custos de aplicação. O sistema foi projetado para possibilitar a otimização do controle das pragas, além de promover a adoção de uma gestão moderna do agronegócio (agricultura de precisão e/ou gestão de sítios específicos) e utilização de tecnologias inovadoras da mecanização agrícola (por exemplo, sistemas inteligentes, sensores e robótica), visando à melhoria na produção e sustentabilidade das empresas agrícolas.

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Santibáñez, Farías Jazmina. "Ley modelo de arbitraje comercial internacional y su aplicación en el derecho comparado : ¿qué tan modelo es la ley modelo?" Tesis, Universidad de Chile, 2015. http://www.repositorio.uchile.cl/handle/2250/130230.

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Krachey, Matthew James. "Hierarchical Bayesian application to instantaneous rates tag-return models." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-08182009-100250/.

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Natural mortality has always been a challenging quantity to estimate in harvested populations. The most common approaches to estimation include a regression model based on life history parameters and more recently tag-return models. In recent years, Bayesian methods have been increasingly implemented in ecological models due to their ability to handle increased model complexity and auxiliary datasets. In this dissertation, I explore the implementation of Bayesian methods to analyze tag-return data focusing on natural mortality. Chapter 1 is focused on the addition of two components to the tag-return model framework: random effects and auxiliary data. Auxiliary information on the instantaneous rate of natural mortality is provided through Hoenig's equation relating lifespan to natural mortality, and also implemented through a hierarchical prior. A simulation study validates the performance of the model while an analysis of the classic Cayuga Lake trout dataset demonstrates its use. Chapter 2 adds a change-point allowing for the estimation of two levels of natural mortality and the timing of the discrete-time shift in mortality. Analysis is focused on a Chesapeake Bay striped bass tagging dataset of fish tagged at six years of age and older from 1991-2002. Results show the ability to account for shift in timing. Contrasting with Jiang et al.'s study on the same striped bass dataset, the timing of the change-point was different between the two studies, likely because the Jiang study assumed a fixed tag-reporting probability of 0.43 whereas estimates seem to indicate it may be closer to 0.3. Chapter 3 introduces a change-point allowing for a shift in the tag-reporting probability while assuming a constant natural mortality rate. High reward tags are included in a subset of the data time-series to improve estimation. A factorial simulation design was used to investigate the model performance with different reporting rate and high reward tag scenarios. In general, the model performed very well with little bias except in the case of no high-reward tags. The model performed surprisingly well in a six year study. The results suggest the importance of high reporting rates and/ or auxiliary data sources such as high reward tags.

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Hallin, Magnus. "SMT-Based Reasoning and Planning in TAL." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-72596.

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Automated planning as a satisfiability problem is a method developed in theearly nineties. It has some known disadvantages, such as its inefficient encod-ing of numbers. The field of Satisfiability Modulo Teories tries to connectalready established solvers for e.g. linear constraints into SAT-solvers in orderto make reasoning about numerical values more efficient. This thesis combines planning as satisfiability and SMT to perform efficientreasoning about actions that occupy realistic time in Temporal Action Logic,a formalism developed at Linköping University for reasoning about action andchange.

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FERREIRA, CARLOS APARECIDO. "AN IMPROVED STEADY-STATE MODEL FOR TAP-CHANGING TRANSFORMER." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2011. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=21702@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
O fenômeno de estabilidade de tensão vem despertando grande interesse acadêmico e das principais empresas de energia elétrica do mundo desde que começou a ser observado em sistemas reais, no final da década de setenta. Sua ocorrência está relacionada ao carregamento excessivo das linhas de transmissão. Modelar transformador com tap variável adequadamente é fundamental em análises de estabilidade de tensão, tanto no que diz respeito às informações fornecidas ao operador referentes às margens de estabilidade de tensão, quanto aos efeitos de ações de controle de tensão. O modelo de transformador com tap variável utilizado mundialmente consiste de uma impedância, obtida através do ensaio em curto-circuito e com tap nominal, em série com um transformador ideal. Esta tese mostra que, em estudos de estabilidade de tensão, o uso desse modelo leva a resultados qualitativamente errados. Para demonstração, utiliza-se um circuito pequeno e os conceitos de máxima potência transmitida, impedância equivalente da carga, e efeito do controle de tensão. Propõe-se um novo modelo coerente com os resultados obtidos em laboratório, com as leis de circuitos elétricos e com a teoria de estabilidade de tensão. Esse modelo pode ser utilizado em qualquer estudo em regime permanente. Através de diversas simulações computacionais, diferenças quantitativas e principalmente qualitativas foram obtidas comparando-se os resultados dos dois modelos.
The voltage stability phenomenon is of interest since it began to be observed in real systems in the late seventies. It happens due to excessive loading of transmission lines. The modeling of tap-changing transformers is fundamental in voltage stability analysis, in terms of the information provided to the operator about voltage stability margins and the effects of voltage control actions. The model for tap-changing transformers currently in widespread use consists of an impedance, measured in a short-circuit test with a nominal tap, in series with an ideal transformer. The use of this model in voltage stability studies leads to qualitatively incorrect results, as shown in this thesis. For demonstration purpose a small circuit and the concepts of maximum load, equivalent load impedance and voltage control effects are used. An improved model that takes into account laboratory results, circuit laws and voltage stability theory is proposed. This model can be used in any steady-state study. It gives results that are not only more accurate than those obtained with the conventional model, but also, as shown in this thesis, qualitatively different.

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Alkhaldi, Abdulmajeed. "A Recommender System using Tag-based Collaborative User Model." Thesis, University of Ottawa (Canada), 2011. http://hdl.handle.net/10393/28840.

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Internet users are overwhelmed by a huge media amount available online. Therefore there is a need of an automated way to make compelling recommendations to users according to their needs. There have been many research efforts to reduce that huge amount of content to what the user really needs or prefers. Recommender systems assisting users in easily finding the useful information, are a main research topic that serves this area. According to techniques recommender systems employ, they are mainly classified into three categories: a collaborative-based filtering, content-based filtering, and hybrid filtering. Collaborative filtering relies on the collaboration of users by capturing their judgments on items, and then recommends these items to users with similar taste. Content-based filtering takes advantage of content of a user's preferred items and recommends new items that have similar content. Hybrid filtering takes advantage of both collaborative and content- based filtering and might be in a different ways. No matter what the technique is used, recommender systems require an accurate user model that can reflect a user's characteristics, preferences, and topics of interest. In addition, the systems should take into account users who newly join the systems and thus has presented few opinions, commonly referred to as the cold start users problem. In our research, by leveraging user-generated tags, we propose the topic-driven enriched user model (EM), which is a new way of modeling a user's topics of interest in collaboration with other similar users, in order to improve the recommendation quality and alleviate the cold start user problem. We also present how the proposed model is applied to item recommendations by using locally weighted naive Bayes approach. For evaluating the performance of our model, we compare experimental results with a user model based on user-based collaborative filtering, a user model based on an item-based collaborative filtering, and a vector space model. The experimental results shows that EM outperforms the three algorithms in both recommendation quality and the cold start situation.

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Smith, Catherine Claire. "The mouse tail model in dermatology : a histological study on the effects of crude coal tar and isoquinoline." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236062.

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This study involves a morphological and histological investigation of normal mouse tail skin and its response to crude coal tar and isoquinoline (a major constituent of coal tar). Mouse tail skin is unusual in that it undergoes both parakeratotic and orthokeratotic keratinization in adjacent sites. The former develops without a granular layer and resembles psoriasis, while the latter, with a granular layer, resembles normal human skin. Based on this property, mouse tail skin has frequently been used as a model for psoriasis but in spite of this, an integrated, detailed picture of its structure has not previously been described. This was achieved in this study by using a range of complementary techniques: light microscopy of embedded and frozen material, scanning and transmission electron microscopy, quantitative image analysis and autoradiography. Such a study may help to elucidate the mechanism of both orthokeratotic and parakeratotic keratinization. Coal tar has been used extensively in the treatment of psoriasis and is safe and effective. However, it is cosmetically unappealing, its mechanism of action is unknown and its efficacy varies with its composition which is extremely heterogeneous. Isoquinoline may significantly contribute to its anti-psoriatic properties. The mode of action of these substances as modifiers of the keratinization process may be clarified by studying their effects on the model. Both substances induced granular layer formation in previously parakeratotic areas, with concommitant development of an orthokeratotic stratum corneum, a desirable property in a potential anti-psoriatic. However, they also induced epidermal thickening and hyperkeratosis. The effects on the pilosebaceous unit were strikingly different: coal tar caused metaplasia of sebaceous glands with follicular hyperkeratosis and hair loss while isoquinoline caused sebaceous gland hypertrophy. Isoquinoline also caused far more epidermal irritation than coal tar, and caused damage to the basal lamina and dermal collagen. The irritant effects were modified to some extent by hydrocortisone cream but this also reduced granular layer induction. These studies suggest that isoquinoline may act on parakeratotic epidermis in a similar way to coal tar. It has the advantages of being a cleaner substance, with a more consistent action. However, its usefulness may be limited by its irritancy.

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Guardia, Mabel Simone de Ara?jo Bezerra. "Fatores condicionantes da utiliza??o da Internet na compra de servi?os de viagens e turismo: estudo com turistas brasileiros em visita ? Natal-RN." Universidade Federal do Rio Grande do Norte, 2006. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15096.

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Made available in DSpace on 2014-12-17T14:53:21Z (GMT). No. of bitstreams: 1 MabelSABG.pdf: 948090 bytes, checksum: 1725ff2ca12b71cf4097a0834b1b55c5 (MD5) Previous issue date: 2006-05-19
In today s global society, companies have become even more competitive with the abundance of information that prospective clients have available to them. This way the tourist services has appropriate the distribution using electronics ways as information for doing acquirement services. This work, shows the adopted provision of on-line tourist services does have suited apportionment for factors and buy decisions. The method used is a survey applied to the tourists, at international airport Augusto Severo, no matter why the visit reason to Natal city, at all, they were 210 people, being the chief variables evaluated the tourist perception of facility, utility, benefits, amenity and pleasure from the Internet s use, under the terms at the tourists experiences from the WEB about to acquisitions and researches. The results acquaint that the younger tourists or less experts tourists, in visit to Natal, demonstrated greater bias to the Internet s use than the other people. By the way women have a larger representation as a consumer from the WEB and finally, people along greater study tends to adopt. The work s contribution provides greater knowledge for the tourism executives about how might use the Internet, as well as bring forward a scene propitious for the on-line diffuseness service
A sociedade vive atualmente uma competitividade constante entre as empresas, uma vez que os clientes disp?em cada vez mais de informa??es para fazer aquisi??o de servi?os. Desta forma a presta??o de servi?os tur?sticos tem adequado sua distribui??o por meio eletr?nico. Este estudo descreve o perfil de ado??o da Internet, assim como fatores que afetam a decis?o de compra de servi?os tur?sticos on line. A metodologia utilizada foi um survey aplicado junto aos turistas, no aeroporto Augusto Severo, independente do motivo da visita ? cidade do Natal-RN, totalizando 210 entrevistados, sendo as principais vari?veis analisadas a percep??o do turista quanto a facilidade, utilidade, divers?o e benef?cios do uso da Internet, com base nas experi?ncias dos turistas e ado??o da rede para compras e pesquisas. Os resultados revelaram que os turistas, que visitam Natal, mais jovens com menos experi?ncia, demonstraram maior propens?o quanto ao uso da Internet do que o restante, a mulher por sua vez tem uma maior representa??o como consumidora da rede e as pessoas com maior grau de instru??o t?m maior tend?ncia a adotar. A contribui??o desse estudo ? a de propiciar um maior conhecimento para os executivos de turismo sobre como podem utilizar a Internet, bem como apresentar um cen?rio prop?cio para a difus?o de servi?os on line

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Klebingat, Stefan [Verfasser], Rafig Akademischer Betreuer] Azzam, and Peter [Akademischer Betreuer] [Quicker. "Development, validation and scenario analyses of two Underground Coal Gasification (UCG) model approaches focussing on gas quality-tar production control and tar pollutant-water solubility risk prognoses / Stefan Klebingat ; Rafig Azzam, Peter Georg Quicker." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1157122434/34.

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Dahl, Emma, and Elina Johansson. "“Arbetet som lärare tar aldrig slut” -En kvalitativ studie om universitetslärares upplevelser av det påtvingadedistansarbetet under covid-19-pandemin." Thesis, Örebro universitet, Institutionen för humaniora, utbildnings- och samhällsvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-89978.

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Teleworking is a fastly developing field, but the teacher profession has not been among thosein the forefront. Due to the Coronavirus pandemic several professions, including universityteachers, have been forced into telework in order to decrease infection rates of Covid-19. Thisstudy analyzes how forced telework affects the experience of a changed work situation. Theaim is to examine how, due to the pandemic, forced telework have affected universityteachers’ experience of their work situation and work/family balance. Six qualitativeinterviews are analyzed through themes of room for action, work load, workplace support andwork/family balance by using the Command -control(-support)model and Work/FamilyBorder Theory. Level of responsibility, authority and previous technical abilities and digitalexperience are shown to be important aspects in relation to dealing with the changed workingenvironment. The balance between work and family/private life is experienced differently butyoung children and availability are two aspects which makes boundary-making harder nowcompared to before the switch to teleworking.
Distansarbete blir allt mer förekommande men läraryrket har inte varit en av de framståendeyrkesgrupperna i utvecklingen. På grund av den rådande pandemin har flera yrkesgrupper,däribland universitetslärare, tvingats till distansarbete för att bidra till minskning avsmittspridningen av Covid-19. Detta självständiga arbete undersöker hur påtvingatdistansarbete påverkar upplevelsen av en förändrad arbetssituation. Syftet med föreliggandestudie är att undersöka hur påtvingat distansarbete, i samband med pandemin, har påverkatuniversitetslärares upplevelse av dels sin arbetssituation och dels balansen mellan arbetslivoch privatliv. Sex kvalitativa intervjuer analyseras utifrån handlingsutrymme,arbetsbelastning, stöttning på arbetsplatsen samt balans mellan arbetsliv och privatliv medstöd i Krav-kontroll(-stöd)modellen och Gränsteori. Grad av ansvar och befogenheter samttekniska färdigheter och digital vana är viktiga faktorer relaterat till hur situationen upplevsoch hanteras. Balansen mellan arbete och privatliv upplevs olika men små barn ochtillgänglighet är två faktorer som gör att gränsdragningen mellan arbetsliv och privatlivupplevs svårare nu jämfört med innan omställningen till distans.

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Šinkūnienė, Kristina. "Tax culture assessment model." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2009~D_20100202_163021-12066.

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The processes of the global economic crisis and its effects affecting the whole life of the State, including the tax system, require examination of their influence on changes in tax culture. To justify the importance of tax culture research, analysis of links between taxes and culture and the tax system from philosophical, social-cultural and theological aspects are presented in the dissertation. The dissertation presents the systematic analysis of the conception and preconditions for formation of the tax culture, specifies conception of the tax culture, and identifies factors affecting the tax culture. Assumptions concerning assessment of tax culture have been validated by assessing how factors determining the tax culture are reflected in macroeconomic indicators, by means of taxpayer opinion survey for specification of the conception of tax culture and for determination of the key factors determining it. The four stages are included into the systematic Tax Culture Assessment Model, which encompasses specification and systematization of factors affecting the tax culture, identification of the most important factors, selection and justification of the indicators reflecting those factors, development and validation of the mathematical model for assessment of the tax culture, and substantiation of universality of the Tax Culture Assessment Model. This model reflects assessment of the tax culture as a synthesis of attitudes and behavior. The developed model was validated on the... [to full text]
Pasaulyje vykstantys ekonominės krizės procesai, jos padariniai, įtakojantys visą valstybės gyvenimą, taip pat ir mokesčių sistemą, verčia kalbėti apie jų įtaką mokesčių kultūros pokyčiams. Siekiant pagrįsti mokesčių kultūros tyrimų svarbą, darbe pateikta mokesčių ir kultūros sąryšių bei mokesčių sistemos analizė (filosofiniu, socialiniu – kultūriniu, teologiniu aspektais). Disertacijoje pateikta sisteminė mokesčių kultūros sampratos ir jos formavimosi prielaidų analizė, patikslinta mokesčių kultūros samprata, pagrįsti mokesčių kultūrą sąlygojantys veiksniai. Mokesčių kultūros vertinimo prielaidos patikrintos, įvertinus mokesčių kultūrą sąlygojančių veiksnių atsispindėjimą makroekonominiuose rodikliuose ir atlikus Lietuvos mokesčių mokėtojų nuomonės tyrimą mokesčių kultūros sampratos tikrinimui ir ją sąlygojančių svarbiausių veiksnių nustatymui. Suformuotas sisteminis mokesčių kultūros vertinimo modelis apima mokesčių kultūrą sąlygojančių veiksnių tikslinimą ir sisteminimą, svarbiausių veiksnių nustatymą ir išskyrimą, rodiklių įvertinančių šiuos veiksnius parinkimą ir pagrindimą, mokesčių kultūros vertinimo matematinio modelio formavimą ir jo tikrinimą bei universalaus mokesčių kultūros vertinimo modelio pagrindimą. Modelis atspindi mokesčių kultūros kaip požiūrio ir elgsenos sintezės vertinimą. Sudarytu ir empiriškai ES šalių pavyzdžiu patikrintu modeliu gali naudotis bet kurios šalies su apmokestinimu susiję dalyviai ar jų grupės ir ypač politikai, mokesčių administratoriai... [toliau žr. visą tekstą]

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Rutkauskaitė, Aistė. "Asmenybės vertinimo galimybės: ryšys tarp Penkių faktorių modelio ir „Profile XT“." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20140623_182216-48806.

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Asmenybės vertinimo galimybės: ryšys tarp Penkių faktorių modelio ir „Profile XT“ Santrauka Asmenybės klausimynai asmenybę vertina nomotetiniu būdu: asmeninės savybės yra lyginamos tarp žmonių ir ieškoma jų bendrumų, bet tyrinėtojas nesigilina į to paties žmogaus savybių dinamiką. Tarp asmenybės bruožų teorijų šiuo metu populiariausias ir daug dėmesio sulaukiantis Penkių faktorių modelis teigia, kad asmenybę išsamiai apibūdina šie faktoriai: Neurotiškumas, Ekstraversija, Atvirumas patyrimui, Sutariamumas, ir Sąmoningumas. Šias savybes empiriškai vertina klausimynas NEO PI-R, kurio lietuviškosios versijos psichometriniai rodikliai rodo, kad jis yra patikimas ir validus. Kitas asmenybę vertinantis klausimynas Profile XT šiuo metu adaptuojamas Lietuvos populiacijai. Profile XT asmenybės bruožai skirstomi į šias dimensijas: Paklusnumas, Savarankiškumas, Objektyvumas, Draugingumas, Prisitaikymas, Pozityvumas, Energingumas, Įtakojimas ir Ryžtingumas. Taip pat vertinami profesiniai interesai, kurie skiriami į šias dimensijas: Verslumo, Finansų, Technikos, Mechanikos, Kūrybos ir Paslaugų. Šio tyrimo tikslas – ištirti dviejų klausimynų sąsajas aptariant asmenybės vertinimo galimybes. Keliami uždaviniai: įvertinti Profile XT patikimumą ir konstrukto validumą: nustatyti atitinkamų asmenybės bruožų, vertinamų Profile XT ir NEO PI-R, sąsajas bei nustatyti sąsajas tarp atitinkamų profesinių interesų, vertinamų Profile XT ir Savarankiško profesijos pasirinkimo klausimynu; nustatyti... [toliau žr. visą tekstą]
Perspectives of Personality Assessment: Relations between Five-Factor Model and „Profile XT“ Summary Among different instruments of personality assessment, questionnaires evaluate personality in a nomothetic way—that is, personality traits are compared among people and commonalities are identified. Most simple questionnaires, however, appraise surface qualities and do not explore a subject’s deeper personality dynamics or traits. A more popular personality assessment test is the Five-Factor Model, which uses Personality Trait theory to assess personality according to five fundamental traits: Neuroticism, Extraversion, Openness to Experience, Agreeableness, and Consciousness. These personality traits are measured by NEO PI-R questionnaire, which psychometric properties of reliability and validity show it can be used for scientific purposes in Lithuania. Another assessment tool, the Profile XT, evaluates vocational interests (Enterprising, Finances, Technical, Mechanical, Creativity, and People Service) and personality traits, which are divided into the following dimensions: Manageability, Independence, Objectivity, Sociability, Accomodating, Attitude, Energy Level, Assertiveness, and Decisiveness. There were 200 participants in the study. In order to analyze the personality evaluation process, we decided to use both the NEO PI-R questionnaire and the Profile XT. As the Profile XT is a new instrument in Lithuania, it is compulsory to measure its psychometric characteristics... [to full text]

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Uysal, Ela. "Application Of Nonlinear Unit Root Tests And Threshold Autoregressive Models." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614878/index.pdf.

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Popularity of nonlinear threshold models and unit root tests has increased after the recent empirical studies concerning the effects of business cycles on macroeconomic data. These studies have shown that an economic variable may react differently in response to downturns and recoveries in a business cycle. Inspiring from empirical results, this thesis investigates dynamics of Turkish key macroeconomic data, namely capacity utilization rate, growth of import and export volume indices, growth of gross domestic product, interest rate for cash loans in Turkish Liras and growth of industrial production index. Estimation results imply that capacity utilization rate and growth of industrial production index show M-TAR type nonlinear stationary behavior according to the unit root test proposed by Enders and Granger (1998).

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Devotto, Acosta Valeria Francesca, Vía Jorge Luis Olivas, Zapata Gerardo Vicente Seminario, and Battistini Carolina Sifuentes. "Influencia de los factores del Modelo TAM en la intención de uso del YAPE." Master's thesis, Pontificia Universidad Católica del Perú, 2020. http://hdl.handle.net/20.500.12404/17606.

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El presente estudio tiene como objetivo identificar qué factor del Modelo TAM influye en la intención de uso del aplicativo móvil Yape. El Yape es un aplicativo móvil del BCP con el que se puede realizar transferencias utilizando el número de celular de los contactos telefónicos y el código QR. Este aplicativo además promueve la disminución de uso del efectivo y la bancarización en el Perú. El tipo de investigación es cuantitativo del subtipo transversal. El desarrollo de este va a permitir identificar la influencia que tienen los factores del modelo TAM en la intención de uso de los clientes del BCP que no utilizan el aplicativo Yape. El modelo TAM de Fred Davis se tomó como referencia para el marco teórico de la investigación debido a que se ha demostrado la influencia de sus factores en estudios anteriores. El instrumento de medición fue tomado de la investigación realizada por los investigadores Peter Yamakawa, Carlos Guerreo y Gareth Rees, quienes brindaron su autorización para el uso de su herramienta en la presente investigación. El tamaño de la muestra fue de 408 encuestados, los cuales fueron clientes del BCP que no utilizan el aplicativo Yape. Los resultados de la investigación concluyeron que el factor de Compatibilidad con el Estilo de Vida es el de mayor influencia en la intención de uso del aplicativo Yape.
The following study aims to identify which factor of the TAM Model influences on the intention to use Yape mobile application. Yape is a BCP mobile application with which you can make transfers using the cell phone numbers on the contact list of the phone and the QR code. In addition, this application promotes the reduction of cash usage and bankarization in Peru. The type of research is quantitative from the Cross-sectional subtype. The development of this research will allow to identify the influence TAM model factors have on BCP clients who do not use Yape application intention to use it. The TAM model of Fred Davis was taken as a reference for the theoretical framework of the research since the influence of its factors has been demonstrated in previous studies. The data-collecting instrument was taken from the research carried out by researchers Peter Yamakawa, Carlos Guerreo and Gareth Rees, who gave their authorization for the use of their tool in this research. The sample was made of 408 respondents, who were BCP clients who do not use Yape application The results of the research concluded that the Lifestyle Compatibility factor is the one with the most influence on the intention to use Yape application.
Tesis

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Gräns, Joakim, and Fredrika Karlsson. ""Sunt förnuft räcker långt – om man tar sig tid till att reflektera!" : en kvantitativ studie om lärares upplevda hälsa." Thesis, Gymnastik- och idrottshögskolan, GIH, Institutionen för idrotts- och hälsovetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:gih:diva-2164.

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Syfte och frågeställningar Syftet med studien är att undersöka och jämföra vilka faktorer i lärares arbetsmiljö i storstad och mindre tätort, som samvarierar med lärares upplevda hälsa. För att uppfylla detta syfte har tre frågeställningar utformats: (1) Vad i arbetsmiljön upplever lärarna som stressorer vilka påverkar deras upplevda hälsa? (2) Vilken roll spelar skolledningen respektive kollegorna för lärarnas upplevda hälsa? (3) Hur korrelerar lärarnas upplevda hälsa med deras fysiska aktivitetsgrad? Metod En kvantitativ metod i form av enkäter har används för att kunna besvara och analysera syftet och frågeställningarna. I huvudsak har enkäten utformats med fasta svarsalternativ. Ett så kallat bekvämlighetsurval har gjorts i val av skolor, där lärare på respektive skola som velat delta i studien har legat till grund för resultatsammanställningen. Total 98 enkäter samlades in och sammanställdes iStatistical Package for the Social Sciences - SPSS- version 19,0. Teoretiska ramverk som användes för analys av resultatet var Antonovskys KASAM-teori samt Karaseks och Theorells Krav-kontroll-stöd-modell. Resultat Studiens resultat visar att det finns en stark korrelation mellan den mentala- och kroppsliga hälsan, både för lärare i storstad (p=0,01) och i mindre tätort (p=0,08). De undersökta lärarna i storstad och mindre tätort upplever att de har en bra mental hälsa och att det är meningsfullt att gå till jobbet. Över 40 % svarar att de ofta (3-5 dagar per veckan) känner att de har egenkontroll, hanterbarhet, meningsfullhet och upplever att de är en del av ett sammanhang. Faktorer som korrelerar med den mentala hälsan är krav från elever, skolledning och sig själv. När det gäller den fysiska miljön är faktorer som påverkar lärarna, i både storstad och i mindre tätort, ljudnivå och renlighet. Skolledningen spelar en stor roll för lärarnas upplevda hälsa, såväl i storstad (p=>0,000) som i mindre tätort (p=0,009). Dock upplever över 50 % av lärarna att de inte har stöd från skolledningen. Lärarna anger att administrativa uppgifter, tid, planering och arbetsklimat är betydelsefulla faktorer som påverkar deras hälsa. Resultatet visar även att den kroppsliga hälsan korrelerar med att vakna utvilad och kunna koppla av. Lärarna i såväl storstad som i mindre tätort upplever att det har en bra kroppslig hälsa. För lärarna i storstad finns det en korrelation mellan stöd från vänner och hur fysisk aktiv du är. Slutsats Slutsatser som kan dras från denna studie är att det inte föreligger stora skillnader mellan lärares upplevda arbetsmiljö och hälsa i storstad och i mindre tätort. Lärarna upplever att de mår bra, både mentalt och kroppsligt. En bidragande faktor till detta är enligt studien att lärarna upplever högt stöd från kollegor samt från vänner och anhöriga. Detta kan tolkas som att stödet utgör en form av copingstrategi, som hjälper lärarna att hantera sin stress – något som även ett flertal tidigare studier lyfter. Studiens resultat leder även fram till slutsatsen att lärare behöver finna balans mellan upplevda krav och finna resurser för att kunna uppleva en känsla av sammanhang. Utifrån krav-kontroll-stöd-modellen gör detta att lärarna upplever en balans i anspänningsgrad.
Aim and questions The study aims to examine and compare which factors in teachers’ work environment, in both metropolitan and small urban areas, correlate with teachers' perceived health. To meet this aim, three questions were designed: (1) What do teachers experience as stress factors in their work environment affecting their health? (2) What influence do the school management and colleagues have on their perceived health? (3) How does the teachers' perceived health correlate with their physical activity level? Method A quantitative method with a questionnaire has been used for the study. In essence, the questionnaire was designed with closed answers. A so-called comfort selection has been made for the choice of schools, where teachers at each school who wanted to participate in the study formed the basis for the collection of data. Overall 98 questionnaires were collected and the statistical analysis was done with help of the Statistical Package for the Social Sciences - SPSS version 19.0. Theoretical frameworks used were Antonovsky's SOC-theory (Sense of Coherence) and Karasek´s and Theorell´s Requirements-control-support model. Results Our results show that there is a strong correlation between mental and physical health, both for teachers in the metropolitan (p = 0.01) and smaller urban area (p = 0.08). The participants from both areas feel that they have a good mental health and that it makes sense to go to work. Over 40% answer that they often (3-5 days per week) feel that they experience self-monitoring, manageability, meaningfulness as teachers and that they are a part of a context. Factors that correlate with mental health are demands from students, school management and themselves. With regard to the physical environment, factors that affect teachers in both metropolitan and small urban areas are noise level and cleanliness. School management plays a large role in teachers' perceived health, both in metropolitan (p => 0.000) and in smaller urban areas (p = 0.009). However, over 50% of the teachers feel that they do not have support from school management. Teachers indicate that administrative tasks, time, planning and working environment are important factors in relation to their experienced health. The result also shows that experienced physical health among teachers correlates with the feeling of waking up refreshed and the ability to relax. The teachers in both metropolitan and less urban areas feel that they have a good physical health. For teachers in metropolitan areas, there is a correlation between support from friends and how physically active you are. Conclusions A conclusion to be drawn from this study is that there are small differences between teachers’ experienced health and work environment in metropolitan and less urban areas. The majority of the teachers feel they have a experienced health, both mentally and physically, and are doing well. A contributing factor to this could be that teachers experience strong support from colleagues, friends and relatives. This could suggest that social networks constitute a form of coping strategy, which help teachers manage their stress. A high percentage of the teachers seem to find a balance between perceived demands and finding resources to experience the sense of coherence. Based on the demands-control-support model, this means that teachers experience a feeling of balance.

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Nguyen, Van Tam [Verfasser]. "Improving the representation of hydrological connectivity in conceptual models / Van Tam Nguyen." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2020. http://d-nb.info/1206685891/34.

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Waterhouse, Lynn. "Partial Year Tagging Models: Accounting for Changing Tag Visibility and Delayed Mixing." W&M ScholarWorks, 2010. https://scholarworks.wm.edu/etd/1539617896.

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Yang, Liu. "The Applicability of the Tap-Delay Line Channel Model to Ultra Wideband." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/35217.

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Ultra-wideband (UWB) communication systems are highly promising because of their capabilities for high data rate information transmission with low power consumption and low interference and their immunity to multipath fading. More importantly, they have the potential to relieve the "spectrum drought" caused by the explosion of wireless systems in the past decade by operating in the same bands as existing narrowband systems. With the extremely large bandwidth of UWB signals, we need to revisit UWB channel modeling. Specifically we need to verify whether or not the traditional tap-line delay channel model is still applicable to UWB.

One essential task involved in channel modeling is deconvolving the channel impulse response from the measurement data. Both frequency domain and time domain techniques were studied in this work. After a comparison, we examined a time domain technique known as the CLEAN algorithm for our channel modeling analysis. A detailed analysis of the CLEAN algorithm is given, as it is found that it is sufficient for our application.

The impact of per-path pulse distortion due to various mechanisms on the tap-delay line channel model is discussed. It is shown that with cautious interpretation of the channel impulse response, the tap-line delay channel model is still applicable to UWB.

Master of Science

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Jara, González Gonzalo Alejandro. "Modelo de negocios para lanzamiento de grifería "Smart-Tap" en el mercado chileno y americano." Tesis, Universidad de Chile, 2017. http://repositorio.uchile.cl/handle/2250/150545.

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Magíster en Gestión para la Globalización
Este informe presenta el trabajo realizado para estudiar y diseñar un plan de negocios que permita el ingreso del producto innovador Smart-Tap al mercado nacional y obtener una primera evaluación del Americano para una potencial exportación del producto. Smart-Tap es un dispositivo que busca solucionar las pérdidas de agua potable que día a día se producen en la ducha de los hogares, cada vez que se espera que el agua alcance temperatura, justo antes de tomar una ducha. Así, Smart-Tap es una solución para disminuir las pérdidas, cuidar el recurso agua y el medio ambiente, y disminuir la cuenta mensual por servicio de agua. El estudio se realiza siguiendo la metodología Canvas, comenzando con una propuesta del modelo de negocios básico e iterando cada una de las etapas hasta conseguir un Canvas revisado, que permita tener un mayor grado de certidumbre para el modelo de negocios. El modelo de negocios propuesto busca la venta directa del producto al usuario final, por medio de la incorporación de un socio estratégico que permita acceder rápidamente al mercado, utilizando su propia logística y puntos de venta. El segmento de mercado considera a las personas con conciencia del cuidado del medio ambiente y del segmento socioeconómico medio y alto, en una primera etapa. En términos financieros, el proyecto considera una inversión de 14 millones de pesos, un precio estimado de venta del producto de $25.000 y una tasa de descuento (Hurdle Rate) de 40%, en un escenario conservador. Con esto se consigue un valor presente neto de 510 millones de pesos, del cual un 77% proviene del flujo de los primeros 5 años. Estos indicadores sólo consideran la primera etapa del proyecto, es decir la penetración del mercado nacional. Luego, la estimación de valor puede ser mayor accediendo de manera exitosa a otros mercados latinoamericanos e incluso Estados Unidos, país que posee una de las tarifas más elevadas por metro cúbico de agua en la región. El proyecto logra un interesante valor presente de 510 millones de pesos bajo condiciones de un escenario conservador, el cual podría variar desde 398 hasta 711 millones, dependiendo de un escenario pesimista o optimista. En gran medida el éxito del proyecto depende de la correcta incorporación de un socio estratégico para el desarrollo de la logística y del lanzamiento de campañas que permitan dar a conocer el producto como una alternativa real y de bajo costo para el cuidado del recurso agua. Esto debe ser desarrollado en múltiples frentes, desde la participación en ferias de innovación y cuidado medioambiental, utilización de medios digitales y audiovisuales de difusión, hasta conversaciones con el Ministerio de Vivienda (o Corfo) para estudiar la factibilidad de instaurar Smart-Tap como un nuevo estándar en la construcción de viviendas sociales eficientes u otras.

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Jiang, Honghua. "Age-Dependent Tag Return Models for Estimating Fishing Mortality, Natural Mortality and Selectivity." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-09072005-085405/.

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We extend the instantaneous rates formulation of fisheries tag return models to allow for age-dependence of fishing mortality rates in Chapter 1. This is important in many applications where tagged fish vary over a large range of ages (and sizes). We focus on a model based on assuming selectivity by age is constant over years and that above a certain age selectivity is fixed at 1. We show that it is possible to allow natural mortality, M, to vary by age and year. We allow for incomplete mixing of tagged fish and for fisheries to be pulse, continuous or continuous over part of the year. We focus on the case where all or most age classes are tagged each year. We investigate model identifiability and how well parameters can be estimated using analytic and simulation methods. Results show that some models with the tag reporting rate estimated are singular or near-singular. The age-length key method commonly used for age specification may produce substantial errors in converting size to age, especially for the older fish. To reduce such errors, in Chapter 2 we propose two alternative sampling designs to the standard one of tagging all age classes: one where only age 1 fish are tagged, another where both age 1 and age 2 fish are tagged. Catch-and-release fisheries have become very important to the management of overexploited recreational fish stocks. Tag return studies where the tag is removed regardless of fish disposition have been used to assess the effectiveness of restoration efforts for these catch-and-release fisheries. In Chapter 3, we extend the instantaneous rate formulation of tag return models introduced in Chapter 1 to catch-and-release tagging studies. We illustrate the methods using multiple age class tag return data on striped bass (Morone saxatilis) from the Maryland Department of Natural Resources (MDNR). We found evidence that M is age dependent and that M has increased since 1999 possibly due to an outbreak of the disease (mycobacteriosis) in striped bass in the Chesapeake Bay.

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Wichers, Sacha. "Verification of numerical models for hydrothermal plume water through field measurements at TAG." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/39173.

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Thesis (S.M.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering; and the Woods Hole Oceanographic Institution), 2005.
Includes bibliographical references (p. 63-65).
Hydrothermal vents discharge superheated, mineral rich water into our oceans, thereby providing a habitat for exotic chemosynthetic biological communities. Hydrothermal fluids are convected upwards until they cool and reach density equilibrium, at which point they advect laterally with the current. The neutrally buoyant plume layer can have length scales on the order of several kilometers, and it therefore provides the best means to detect the presence of vent fields on the seafloor, which typically have length scales on the order of a few meters. This thesis uses field measurements of the velocity, temperature and particulate anomalies associated with the TAG hydrothermal plume to demonstrate that tidal currents exert a strong impact on the plume shape, and to provide new constraints on the thermal power of the TAG hydrothermal system. The results show that the power output of the TAG system is on the order of 6000 MW, which is up to two orders of magnitude greater than previous estimates, and that there is considerably more entrainment than had previously been assumed.
by Sacha Wichers.
S.M.

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Swetkis, Doreen. "Residential property tax abatement testing a model of neighborhood impact /." Cleveland, Ohio : Cleveland State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=csu1258938619.

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Thesis (Ph.D.)--Cleveland State University, 2009.
Abstract. Title from PDF t.p. (viewed on Dec. 11, 2009). Includes bibliographical references (p. 141-153). Available online via the OhioLINK ETD Center and also available in print.

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Sousa, Fátima Carina Gonçalves. "Utilização do modelo SCRUM na Megasis." Master's thesis, Instituto Superior de Economia e Gestão, 2018. http://hdl.handle.net/10400.5/20214.

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Mestrado em Gestão de Sistemas de Informação
O presente Trabalho Final de Mestrado tem como objetivo descrever todas as atividades desenvolvidas durante a realização do estágio curricular no Centro de Business Intelligence da Megasis/TAP IT, colocando em prática e consolidando conhecimentos adquiridos ao longo do mestrado. Aborda um conjunto de atividades que permitem a automatização de vários processos manuais associados ao modelo Agile de desenvolvimento de software e dá também a conhecer como é aplicada a metodologia Scrum num departamento de Business Intelligence. O relatório começa por dar conta da revisão da literatura explicando o que é o scrum, quem são os participantes e quais as coreografias. De seguida, são descritas as atividades desenvolvidas no estágio, desde o enriquecimento do modelo de dados de scrum com novos conceitos como também a criação de relatórios e dashboards, sendo estes o output final da solução de BI. É feita uma análise critica comparando a literatura existente e as atividades do estágio assim como uma apreciação pessoal sobre as mesmas. As atividades são descritas e acompanhadas com o anexo de imagens dos vários dashboards criados.
The purpose of this master's Report is to describe all the activities developed during the internship at the Megasis/TAP IT Business Intelligence Center, putting into practice and consolidating knowledge acquired through out the master's program. It addresses a set of activities that allow the automation of several manual processes associated with the Agile model of software development. It also shows how the Scrum model is applied in a Business Intelligence Department. The literature review describes topics such scrum, the participants and the events. What it comes next is the description of the activities of the internship, the enrichment of the model of scrum with new concepts and last the dashboards and reports that are the BI final solution output. A critical analysis, as well as a personal assessment, is made comparing the existing literature and the internship activities. The activities are described and accompanied by image attachments of the various dashboards created.
info:eu-repo/semantics/publishedVersion

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Malwandla, Musa. "Quantitative models for prudential credit risk management." Doctoral thesis, Faculty of Commerce, 2021. http://hdl.handle.net/11427/33779.

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The thesis investigates the exogenous maturity vintage model (EMV) as a framework for achieving unification in consumer credit risk analysis. We explore how the EMV model can be used in origination modelling, impairment analysis, capital analysis, stress-testing and in the assessment of economic value. The thesis is segmented into five themes. The first theme addresses some of the theoretical challenges of the standard EMV model – namely, the identifiability problem and the forecasting of the components of the model in predictive applications. We extend the model beyond the three time dimensions by introducing a behavioural dimension. This allows the model to produce loan-specific estimates of default risk. By replacing the vintage component with either an application risk or a behavioural risk dimension, the model resolves the identifiability problem inherent in the standard model. We show that the same model can be used interchangeably to produce a point-in-time probability forecast, by fitting a time series regression for the exogenous component, and a through-the-cycle probability forecast, by omitting the exogenous component. We investigate the use of the model for regulatory capital and stress-testing under Basel III, as well as impairment provisioning under IFRS 9. We show that when a Gaussian link function is used the portfolio loss follows a Vašíček distribution. Furthermore, the asset correlation coefficient (as defined under Basel III) is shown to be a function of the level of systemic risk (which is measured by the variance of the exogenous component) and the extent to which the systemic risk can be modelled (which is measured by the coefficient of determination of the regression model for the exogenous component). The second theme addresses the problem of deriving a portfolio loss distribution from a loan-level model for loss. In most models (including the Basel-Vašíček regimes), this is done by assuming that the portfolio is infinitely large – resulting in a loss distribution that ignores diversifiable risk. We thus show that, holding all risk parameters constant, this assumption leads to an understatement of the level of risk within a portfolio – particularly for small portfolios. To overcome this weakness, we derive formulae that can be used to partition the portfolio risk into risk that is diversifiable and risk that is systemic. Using these formulae, we derive a loss distribution that better-represents losses under portfolios of all sizes. The third theme is concerned with two separate issues: (a) the problem of model selection in credit risk and (b) the problem of how to accurately measure probability of insolvency in a credit portfolio. To address the first problem, we use the EMV model to study the theoretical properties of the Gini statistic for default risk in a portfolio of loans and derive a formula that estimates the Gini statistic directly from the model parameters. We then show that the formulae derived to estimate the Gini statistic can be used to study the probability of insolvency. To do this, we first show that when capital requirements are determined to target a specific probability of solvency on a through-the-cycle basis, the point-in-time probability of insolvency can be considerably different from the through-the-cycle probability of insolvency – thus posing a challenge from a risk management perspective. We show that the extent of this challenge will be greater for more cyclical loan portfolios. We then show that the formula derived for the Gini statistic can be used to measure the extent of the point-in-time insolvency risk posed by using a through-the-cycle capital regime. The fourth theme considers the problem of survival modelling with time varying covariates. We propose an extension to the Cox regression model, allowing the inclusion of time-varying macroeconomic variables as covariates. The model is specifically applied to estimate the probability of default in a loan portfolio, where the experience is decomposed the experience into three dimensions: (a) a survival time dimension; (b) a behavioural risk dimension; and (c) calendar time dimension. In this regard, the model can also be viewed as an extension of the EMV model – adding a survival time dimension. A model is built for each dimension: (a) the survival time dimension is modelled by a baseline hazard curve; (b) the behavioural risk dimension is modelled by a behavioural risk index; and (c) the calendar time dimension is modelled by a macroeconomic risk index. The model lends itself to application in modelling probability of default under the IFRS 9 regime, where it can produce estimates of probability of default over variable time horizons, while accounting for time-varying macroeconomic variables. However, the model also has a broader scope of application beyond the domains of credit risk and banking. In the fifth and final theme, we introduce the concept of embedded value to a banking context. In longterm insurance, embedded value relates to the expected economic value (to shareholders) of a book of insurance contracts and is used for appraising insurance companies and measuring management's performance. We derive formulae for estimating the embedded value of a portfolio of loans, which we show to be a function of: (a) the spread between the rate charged to the borrower and the cost of funding; (b) the tenure of the loan; and (c) the level of credit risk inherent in the loan. We also show how economic value can be attributed between profits from maturity transformation and profits from credit and liquidity margin. We derive formulae that can be used to analyse the change in embedded value throughout the life of a loan. By modelling the credit loss component of embedded value, we derive a distribution for the economic value of a book of business. The literary contributions made by the thesis are of practical significance. The thesis offers a way for banks and regulators to accurately estimate the value of the asset correlation coefficient in a manner that controls for portfolio size and intertemporal heterogeneity. This will lead to improved precision in determining capital adequacy – particularly for institutions operating in uncertain environments and those operating small credit portfolios – ultimately enhancing the integrity of the financial system. The thesis also offers tools to help bank management appraise the financial performance of their businesses and measure the value created for shareholders.

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LIU, HSIN-TZU, and 劉欣姿. "Mean Reversion in Stock markets: Band-TAR Model." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/96363961517460562303.

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碩士
國立臺北大學
經濟學系
96
Detecting mean reversion is in order to evidence market inefficiency. Many studies about mean reversion are in terms of Summers’ (1986) idea－stock price is composed of random walk and stationary components. They suggest that mean reversion is due to contrarian investment strategy while stock price’s overreaction temporarily. However, they don’t import transaction cost and bands of inaction for mean reversion. This article applies the Band-TAR model by Obstfeld and Taylor(1997) to study mean reversion in stock markets over the 1971-2007 period －including Taiwan, Korea, Singapore, Hong Kong, United States, Japan, Thailand. Using Band-TAR model, we can find mean reversion and bands of inaction in Taiwan, Korea, Singapore, and Thailand. This result isn’t found in AR (1) model. Further study for predictability of stock price, we compare Band-TAR, AR (1) and Random walk without draft model in predictive accuracy. The in-sample period is 1971 to 1999 and out-of-sample period is 2000 to 2007. We utilize “Modified Diebold-Mariano test” by Harvey,Leybourne and Newbold (1997) and “nested model test” by Clark and West (2006).

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"Change point estimation for threshold autoregressive (TAR) model." 2012. http://library.cuhk.edu.hk/record=b5549066.

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時間序列之變點鬥檻模型是一種非線性的模型。此論文探討有關該模型之參數估計，同時對其參數估計作出統計分析。我們運用了遺傳式計算機運算來估計這些參數及對其作出研究。我們利用了MDL來對比不同的變點門檻模型，同時我們也利用了MDL來選取對應的變點門檻模型。
This article considers the problem of modeling non-linear time series by using piece-wise TAR model. The numbers of change points, the numbers of thresholds and the corresponding order of AR in each piecewise TAR segments are assumed unknown. The goal is to nd out the “best“ combination of the number of change points, the value of threshold in each time segment, and the underlying AR order for each threshold regime. A genetic algorithm is implemented to solve this optimization problem and the minimum description length principle is applied to compare various segmented TAR. We also show the consistency of the minimal MDL model selection procedure under general regularity conditions on the likelihood function.
Detailed summary in vernacular field only.
Tang, Chong Man.
Thesis (M.Phil.)--Chinese University of Hong Kong, 2012.
Includes bibliographical references (leaves 45-47).
Abstracts also in Chinese.
Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Introduction --- p.1
Chapter 2 --- Minimum Description Length for Pure TAR --- p.4
Chapter 2.1 --- Model selection using Minimum Description Length for Pure TAR --- p.4
Chapter 2.1.1 --- Derivation of Minimum Description Length for Pure TAR --- p.5
Chapter 2.2 --- Optimization Using Genetic Algorithms (GA) --- p.7
Chapter 2.2.1 --- General Description --- p.7
Chapter 2.2.2 --- Implementation Details --- p.9
Chapter 3 --- Minimum Description Length for TAR models with structural change --- p.13
Chapter 3.1 --- Model selection using Minimum Description Length for TAR models with structural change --- p.13
Chapter 3.1.1 --- Derivation of Minimum Description Length for TAR models with structural change --- p.14
Chapter 3.2 --- Optimization Using Genetic Algorithms --- p.17
Chapter 4 --- Main Result --- p.20
Chapter 4.1 --- Main results --- p.20
Chapter 4.1.1 --- Model Selection using minimum description length --- p.21
Chapter 5 --- Simulation Result --- p.24
Chapter 5.1 --- Simulation results --- p.24
Chapter 5.1.1 --- Example of TAR Model Without Structural Break --- p.24
Chapter 5.1.2 --- Example of TAR Model With Structural Break I --- p.26
Chapter 5.1.3 --- Example of TAR Model With Structural Break II --- p.29
Chapter 6 --- An empirical example --- p.33
Chapter 6.1 --- An empirical example --- p.33
Chapter 7 --- Consistency of the CLSE --- p.36
Chapter 7.1 --- Consistency of the TAR parameters --- p.36
Chapter 7.1.1 --- Consistency of the estimation of number of threshold --- p.36
Chapter 7.1.2 --- Consistency of the change point parameters --- p.43
Bibliography --- p.45

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Chen, Chih An, and 陳致安. "Analysising and Forecasting for TAR Models with Exogenous Multi-Variables." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/50335258900017189983.

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碩士
國立政治大學
應用數學系
104
In this research, we use exogenous multi-variables as threshold values to construct a threshold autoregressive model in order to analysis and forecast TAIEX index between 103 years and 105 years. Constructing the threshold autoregressive model with multi-variables is better to reflect the process and trend of the change in time series structure than traditional model. This provides the better explanatory ability for model analysis and forecast. Also, the threshold autoregressive model with multi-variables containing exogenous multi-variables can apply more range, especially, as the structure change in time series due to the exogenous multi-variables shock. Through adding more exogenous variables, one can analyze data and forecast accurately. In this paper, the empirical results of TAIEX index shows that the threshold autoregressive model with multi-variables containing exogenous multi-variables is more precise than the traditional way.

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Huang, Tzu-hsun, and 黃資勛. "Applications on threshold autoregression model (TAR model)：Bond segregation policy affects mutual fund." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/56079112188330985883.

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碩士
朝陽科技大學
財務金融系碩士班
101
This study aims to examine the impacts of United Securities Investment Trust event on Taiwan mutual fund industry by applying non-linear threshold auto regression by Caner and Hansen (2001). Additionally, we examine the relationship between size and manager fare of mutual fund. We aggregate size and manager fare across types of mutual fund, including stock fund, currency fund, bond fund, rebalanced fund, fund of fund. Our sample period is during 2001/1 to 2012/11. Subsamples before and after the event are also analyzed. Our results suggest the existence of threshold effects on size and manager fee of mutual fund. We find that there is significant non-linear threshold effect between changes in manager fare and fund size. Further, in some cases changes in size and manager fare appear partial unit root but others show complete unit root. In addition, the policy is effective impacts on Taiwan mutual fund.

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Marques, Pedro Nuno Pacheco. "Avaliação de modelos de maturidade de sistemas de Business Intelligence: caso de estudo TAP Portugal." Master's thesis, 2013. http://hdl.handle.net/10071/9076.

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Classificação ACM: H.4.2 Types of Systems - Decision Support
Business Intelligence (BI) representa atualmente uma das áreas de maior investimento por parte das organizações. O interesse demonstrado pelos gestores executivos tem sido crescente e a tomada de decisão suportada por sistemas de informação analíticos tem-se revelado um fator decisivo para elevar a competitividade das empresas. Contudo, não se assiste ainda ao sucesso generalizado das iniciativas de BI pois o grau de satisfação de utilizadores e profissionais de BI fica aquém do potencial que um sistema de BI/Data Warehouse proporciona. Os modelos de avaliação de maturidade podem desempenhar um papel fundamental no sucesso da implementação de um programa de BI. Nesta dissertação é feita uma revisão bibliográfica dos modelos de maturidade de BI e uma análise comparativa, em particular do ponto de vista das dimensões de avaliação de maturidade. A avaliação dos modelos de maturidade consistiu em verificar a sua aplicabilidade num contexto real pelo que se recorre ao caso de estudo como método de validação. Do inquérito realizado na TAP Portugal retiram-se conclusões importantes como a confirmação de que os aspetos associados à organização são considerados mais relevantes para a maturidade do BI do que tecnologia, processos ou pessoas. De acordo com o ensaio realizado para definição de um conjunto de dimensões transversais aos modelos, as mais relevantes para avaliar a maturidade são Valor para a organização e Cultura analítica. Adicionalmente, no caso de estudo verificou-se que a aplicabilidade de um modelo de maturidade de BI (TDWI) contribuiu para que hoje em dia a arquitetura de Data Warehouse seja eficiente e escalável.
Business Intelligence (BI) is now one of the areas where companies invest the most. Business executives’ awareness is increasing and decisions supported by analytic information systems are becoming crucial in improving organizations competitiveness. However, the success of BI initiatives is not yet widespread since the satisfaction of both BI users and practitioners is still below the level BI/Data Warehouse systems can provide. Assessment maturity models may play an important role regarding a successful BI program implementation. This dissertation includes a state of the art of BI maturity models and a comparative study, particularly in the maturity model dimensions perspective. The evaluation of the maturity models consisted on the verification of their applicability to a real context, using case study as the validation method. Valuable conclusions were drawn from the survey and interview led at TAP Portugal such as the confirmation that organizational aspects are considered more relevant for BI maturity than technology, processes or people. In accordance with the essay on defining generic dimensions that cover all models, Value to the organization and Analytic culture were the most relevant when assessing BI maturity. Additionally, the case study revealed that the use of a BI maturity model (TDWI) contributed on establishing a more efficient and scalable Data Warehouse architecture.

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42

Lin, Song-Shang, and 林頌賢. "The Liquidity Effect of Money Supply on Taiwan : A TAR Model." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/83580685469573349344.

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43

Kuo, Fang-Ju, and 郭芳汝. "Thermal Plasma Reforming of CO2 and Biomass Tar – Toluene as a Model Compound." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/9tvty4.

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碩士
國立宜蘭大學
環境工程學系碩士班
102
Synthesis gas (or “syngas”), a mixture of carbon monoxide and hydrogen, is an important intermediate for various synthesizing chemicals and environmentally clean fuels. Synthesis gas can be produced from coal, petroleum coke, natural gas, biomass and even from organic wastes. Thermal plasma reforming of CO2 and toluene as a model compound of gasification or pyrolysis tar to produce syngas was investigated in this study. Reforming is of rapid growing interest for reasons of the continuous decrease of petroleum resources and the emphasis on the environmental situation for greenhouse gas mitigation. Plasma technology is considered to be one of potential ways for tar (taking toluene (C7H8) as model material) and CO2 reforming. Tar and CO2 reforming becomes more attractive because it not only lessens tar consumption but also makes use of carbon dioxide. In this study, a thermal plasma reactor (thermal plasma) was used for the reforming of toluene and CO2 at the different ratios (1/0, 1/13, 1/20, 1/37) of C7H8/CO2, initial concentrations of toluene (1639-2670 ppmv), temperatures (423, 473, 573, 673 K), H2O flow rates (0.75, 1.5, 3 mL/min) and reaction times (0, 5, 10, 20, 30, 40). The major yields of CO and H2 were also addressed and analyzed using GC-TCD, at the same time, the types of by-product were analyzed using GC/MS. In the first tested experiment, the highest toluene conversion was 88.8% when the N2 flow rate at 7 L/min. Next, toluene conversion increased from 68.3% to 92.9% widely when the N2 flow rate of 7 L/min rose to 9 L/min. The main reason may be due to the N2 at higher flow rate, and the plasma with toluene was well mixed while let to low initial concentration of toluene. In the second part, the different ratio of C7H8/CO2 while at constant flow of CO2 showed that the temperature increased, the conversion, selectivity and concentration of products rose significantly. The result showed that the C7H8/CO2 ratio of 1/58 appearred the highest effect on the indexes. The highest conversions of C7H8 and CO2 were 95.5% and 77.9%, respectively. The selectivities of CO and H2 were 135.7% and 84.4%; meanwhile, the CO and H2 concentrations were 42,102 and 18,464 ppmv, respectively. From the result, the temperature of 673K and the C7H8/CO2 ratio of 1/58 were the optimum operational conditions in dry reforming situation. After the steam injecting coupled with the C7H8 and CO2 flows at the advanced steps, the results showed that at the increase of the steam flow rate, the C7H8 conversion and H2 selectivity also increased widely, at the same time, the H2 concentration increased more than two times. However, on the contrary, the CO2 conversion and CO concentration did not increase obviously, while CO selectivity also decreased. At this condition, the highest conversion of C7H8 and selectivity of H2 were 98.2% and 263.7%, respectively. As it was compared to the situation without steam input, C7H8 conversion increased from 95.5% to 98.4%, and then it was fuether compared to those without CO2 and steam flows, C7H8 conversion increased from 91.4% to 98.4% apperantly. Therefore, water spillted to participate the pyrolysis and gasification reactions obviously occurred after the addition of steam. The reasons about the H2 concentration over 100% can be contributed to the reaction of steam reforming (C7H8 + 14H2O → 7CO2 + 18H2) and water-gas shift reaction (C + H2O → CO + H2). Besides, the injection of the steam will occurre to let the H2O to react with CO (CO + H2O → CO2 + H2), while it is responsible to the stability of CO2 concentration without decrease. In accordance with the result, the optimum operating parameters were 673K, C7H8/CO2 of 1/58 and H2O flow rate of 3 mL/min in this study. In the solid products analyses, the results of the element and heating value analysis showed that the residue displaced the lowest C% (25.1%) and average heating value (5234 kcal/kg) was at the temperature of 673K and C7H8/CO2 molar ratio of 1/58. It appears that high temperature is beneficial to dry reforming and it also results in the broken of carbon bond of toluene and produces to the products of CO and H2. The evidence of the fewer C% make the lower heating value is addressed, as well as, the injection of steam not only increase the conversion of CO2 but also make the dry reforming of toluene completely. From the SEM photos, the residues were not affected obviously at different temperatures and agents of CO2, furthermore, the shape of residues displayed spherical types near nanometer scale. However, it is clear that high temperature (673K) and high CO2 flow rate (240 mL/min) with steam will over come the problem of corbon deposition. In the conclusion, this study proves that steam input will provide more H and O, and it not only enhances the production of H2 but also removes the deposited corbon and ash from reaction. Therefore, this study presents that the technology of plasma dry/steam reforming of tar will solve the problems from the traditional thermal technology.

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Lai, Chi-yong, and 賴志勇. "RFID Database Models for Moving Tag Application." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/77f84d.

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碩士
逢甲大學
資訊工程學系
102
RFID tags are usually hanged on the moving carries, including a conscious organism or an artificial entity. For the application that these carriers can generate the outputs, it is difficult to determine the output belonged to which carrier. In particular, it is extremely hard to achieve that once there are several carriers located at a close location, but only one output is laid out. Thus, we present as RFID relational database model and analysis framework to record a large number of tag data. The Chinese Remainder theorem us applied to enhance the performance of SQL queries and to trace the moving path of tags. Moreover, the time data of output is gotten by PLC connected electronic sensor, and the belongings pairing between the moving carriers and the outputs can be gotten after the cross-analysis of the tags went through or stayed with the outputs information. The pairing result of the poultry and the egg laid is helpful to the researcher sort of the poultry with outputs more and less for in-depth study. According to the experimental data, the proposed framework can get the benefit over 95% of pairing between tags and output. The main reason why it can not reach 100% benefit is due to RFID reader’s reading influenced by environmental and physical limitations.

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45

Chen, Chiang-Mei, and 陳將美. "Ecological Model Approach to Explore Smoking Behavior in Tao-Yuan,Taiwan -Application of the Hierarchical Linear Models." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/a9u67q.

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碩士
輔仁大學
公共衛生學系碩士班
95
Purpose: Comparing with prevalence of adults cigarette smoking in Taiwan, Tao-Yuan County has a higher smoking rate. Besides, there are different urbanizations in Tao-Yuan. Thus, we should consider the differences between communities while promoting the tobacco control programs. The objective of this study was that used the ecological model to examine risk factors of smoking behaviors from both individual and community levels. Methods: The data was obtained by structural questionnaire and selected by a stratified cluster random sampling method. First, we stratified Tao-Yuan County by districts (thirteen districts, ex. Tao-Yuan City, Jhong-li City). Second, in every district, we used the family as a unit, age 18 or above would be requested to participate in a telephone survey. The total population was 11,456 adults. Data were used sampling weight to adjust the differences between population and the sample. The relationship between each district and smoking behavior were analyzed by Chi-square Test, ANOVA, Logistic Regression and Hierarchical Linear Model (HLM). Results: 1.Prevalence of smoking was lowest in Jhong-li City (23.4%) and highest in Guan-yin Township (32.4%). People who lived in Tao-Yuan City got the highest score of cognition of tobacco smoking (3.73), in Guei-shan Township had the lowest score(3.11). Long-tan Township had the best attitude toward anti-smoking (16.54), and Fu-sing Township had the worst attitude toward anti-smoking (15.68). 2.The odds ratios of HLM analyses revealed that males, age 25 or above, married, high-school degree, semi-technical personnel, managers and civil representatives, less positive attitude toward anti-smoking, exposure secondhand smoking at home, and positive attitude toward cigarette firms’ promotion activities were significant individual level of effect of smoking behavior. 3.With respect to the community level factors, there was not significant in urbanization; the more areca quid chewing in townships, the more smoking people did; when the townships were having the better attitude toward anti-smoking and cognition of tobacco smoking, the people were less smoking; the more drinking in townships, the more smoking people did. 4.The interaction effects of cross-level interpret variable, it was not significant effects between high-level variables and individual variables toward smoking behavior. Conclusions: 1.It is suggested that authorities should direct at high risk population for future smoking policy-making. 2.This study shows both individual and community factors jointly predict Tao-Yuan residents’ smoking behavior. In addition to tailoring the individual characteristics, effective tobacco control programs should also undertake resolutions for environmental hazards unique to each community that barricade the strength of anti-smoking efforts.

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LEE, CHIA-YU, and 李佳育. "Technology Acceptance Model (TAM), Electronic Luggage Tags." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/8mahr6.

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碩士
國立高雄餐旅大學
觀光研究所
106
Based on the rapid growing trend of the information system and Internet technology, the development of mobile services increases efficient information immediately. More and more industries utilize new technology. Both airport and airline company have been using innovation and convenient Self-service Technology to instead of traditional services. In order to understand the consumers' behavioral intention about adopting the innovation and environmental product electronic luggage tags by Rimowa in 2016. This study takes the Technology Acceptance Model (TAM) as basis and combines two additional constructs: personal innovativeness, perceived risk for using electronic luggage tags（perceived risk as an interference variable. A total of 430 questionnaires were delivered on the Internet by convenient sampling and 386 valid questionnaires were collected. This research uses the method of regression analysis to develop a research model. The result suggested that personal innovativeness, perceived usefulness, perceived ease of use，attitude were significantly impacted individual’s attitude toward adoption while perceived risk was in moderate relationships to attitude toward adoption.

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47

Lin, Ho-Shan, and 林河山. "Studies on Nonlinear TAR and RCA Models with Application on Simulation and Forecasting of Monthly Riverflow." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/90338749054457378526.

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碩士
淡江大學
水資源及環境工程學系
85
Yu(1986) used bispectrum to show that the hydrological series are often nonlinear. The major objective of this present study is to investigate the two nonlinear time series models that are Threshold Autoregressive Model and Random Coefficient Autoregressive Model, denoted TAR model and RCA model in brief. The linear autoregressive model is also compared with nonlinear models. In this research, the parameters estimation of the two nonlinear models are studied. The monthly riverflow data in Taiwan are employed to investigate the aptness of these nonlinear time series models. In this study, a method was proposed to detect Subset Threshold Autoregressive Model, denoted STAR model in brief. In this study, least square method and the method proposed by Tsay(1989) are used to estimate the parameters of TAR model. The least square method proposed by Nicholls and Quinn(1982) is used to estimate RCA model. The results indicate that the estimation of parameter for TAR model is affected by sample size and threshold value, while the RCA model is affected by sample size and estimation method. The method for detecting STAR model proposed in this study has in good precision. The performance of TAR model is better than RCA model and AR model when the data are detrended for the preservation of skewness coefficient when the data are highly skewed and for forecasting ability when the data are lowly skewed. The RCA model also has better forecasting ability than AR model when the data are detrended in south area of Taiwan. In conclusion, the nonlinear time series models are appropriate for riverflow in Taiwan.

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48

"Modelo conceptual para la automatización de bibliotecas en el contexto digital." Universidad de Murcia, 2006. http://www.tesisenred.net/TDR-0725106-121514/.

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49

"Los clásicos redivivos en el aula (Modelo didáctico interdisciplinar en Educación Literaria)." Universidad de Murcia, 2006. http://www.tesisenred.net/TDR-0725107-134925/.

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50

Gaspar, Miguel José Fernandes Martins. "TAP : facing the low-cost competition." Master's thesis, 2015. http://hdl.handle.net/10400.14/18440.

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