Análise de métodos de produção de interfaces visuais para recuperação da informação

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estimação espaço-temporal das perdas não técnicas no sistema de distribuição de energia elétrica

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

High precision swept volume approximation with conservative error bounds

In technical design processes in the automotive industry, digital prototypes rapidly gain importance, because they allow for a detection of design errors in early development stages. The technical design process includes the computation of swept volumes for maintainability analysis and clearance checks. The swept volume is very useful, for example, to identify problem areas where a safety distance might not be kept. With the explicit construction of the swept volume an engineer gets evidence on how the shape of components that come too close have to be modified.rnIn this thesis a concept for the approximation of the outer boundary of a swept volume is developed. For safety reasons, it is essential that the approximation is conservative, i.e., that the swept volume is completely enclosed by the approximation. On the other hand, one wishes to approximate the swept volume as precisely as possible. In this work, we will show, that the one-sided Hausdorff distance is the adequate measure for the error of the approximation, when the intended usage is clearance checks, continuous collision detection and maintainability analysis in CAD. We present two implementations that apply the concept and generate a manifold triangle mesh that approximates the outer boundary of a swept volume. Both algorithms are two-phased: a sweeping phase which generates a conservative voxelization of the swept volume, and the actual mesh generation which is based on restricted Delaunay refinement. This approach ensures a high precision of the approximation while respecting conservativeness.rnThe benchmarks for our test are amongst others real world scenarios that come from the automotive industry.rnFurther, we introduce a method to relate parts of an already computed swept volume boundary to those triangles of the generator, that come closest during the sweep. We use this to verify as well as to colorize meshes resulting from our implementations.

A tomada de decisão nas instituições particulares de solidariedade social

Introdução e objetivo: Atualmente as Instituições Particulares de Solidariedade Social deparam-se com mudanças de caracter social, económico e legislativo, que têm afetado o seu funcionamento e financiamento. Pelo que, impõe-se às suas direções responder às necessidades sociais com maior responsabilidade e eficiência num contexto de maior escassez de recursos. Neste sentido, o presente estudo tem como objetivo compreender o modo como as Instituições Particulares de Solidariedade Social tomam decisões, ao nível do financiamento, para um funcionamento eficiente das mesmas. Metodologia: Optou-se por realizar estudos de caso com uma amostra constituída por quatro Instituições Particulares de Solidariedade Social. A recolha de dados foi feita através de entrevistas semiestruturadas e análise documental. O tratamento de dados foi feito através de análise de conteúdo e com recurso ao software QRS Nvivo versão 10. Resultados: Os principais resultados indicam que: a) as necessidades sociais influenciam decisões de aumento e diminuição da capacidade de respostas das instituições; b) o sistema legal influencia a perpetuação de intervenções de caracter institucional; c) a conjuntura económica influencia a pressão sobre o preço da comparticipação familiar e o aumento da concorrência entre instituições; d) a escassez de recursos constitui-se como denominador comum entre instituições, influenciando decisões de investimento que assumem o financiamento público como um facto consumado; e) as práticas de liderança e gestão desenvolvidas por direções com elementos que têm conhecimentos na área financeira são mais propensas a assumir o risco e a aumentar a complexidade operativa das instituições f) as práticas de envolvimento de stakeholders internos e externos contribuem para a aquisição de apoio na prossecução dos seus objetivos. Conclusão: As tomadas de decisão das instituições com acordos com a segurança social assemelham-se por prevalecer o desenvolvimento de respostas tipificadas, com acordo com a segurança social. Apesar disso, os resultados evidenciam a importância de práticas de liderança e gestão desenvolvidas com a presença de elementos com conhecimentos na área financeira, para o desenvolvimento de respostas tipificadas com rentabilidade económica. Salienta-se ainda que o desenvolvimento de práticas de envolvimento de stakeholders internos e externos, baseados na responsabilização e transparência, promovem o alcance de apoios para assegurar o desenvolvimento das atividades institucionais, com maior incidência na instituição sem acordos com a segurança social, mas que os mesmos não asseguram a sua eficiência económica.

A importância dos ambientes educativos no processo de aprendizagem

Relatório de Estágio apresentado à Escola Superior de Educação de Paula Frassinetti para obtenção do grau de Mestre em Educação Pré-Escolar e ensino do 1.ºCiclo do Ensino Básico

Desafios na descoberta de talento(s)

Relatório de Estágio apresentado à Escola Superior de Educação de Paula Frassinetti para obtenção de grau de Mestre em Educação Pré-Escolar e Ensino do 1º Ciclo do Ensino Básico

Estudo de um método de avaliação de desempenho aplicado aos técnicos de radiologia do Hospital Curry Cabral

A avaliação do desempenho e a sua aplicação são, no actual enquadramento socioeconómico, cada vez mais necessárias, como forma de melhorar a eficácia e a eficiência entre as organizações. Para a prática profissional verifica-se que a implementação da avaliação de desempenho, apresenta lacunas que podem comprometê-la. Sabendo da importância do profissional para o sucesso da implementação da avaliação de desempenho, toma-se fundamental, analisar a sua percepção face ao modelo e sua implementação. O problema da instrução do presente estudo pretende saber quais as percepções dos técnicos de radiologia avaliados sujeitos ao modelo de avaliação de desempenho implantado no Hospital Curry Cabral. Tendo como objectivo ao nível da gestão, minimizar os obstáculos de implementação e maximizar os pontos fortes. Após pesquisa bibliográfica sobre os principais conceitos, foi definido domo objectivo da investigação empírica: - Comparar as percepções dos técnicos de radiologia submetidos ao modelo de avaliação desempenho ”Pró-Activo”. Recorrendo a uma metodologia exploratória e descritiva, estudámos o impacto dessas ferramentas utilizadas dentro da Unidade Hospitalar do estudo. A metodologia de recolha de informação aos profissionais expostos do estudo assentou em questionários de perguntas fechadas e abertas ambas com uma abordagem de carácter quantitativo. Para a análise e tratamento dos dados utilizou-se programas informáticos. As principais conclusões: verifica-se a falta de formação para todos os envolvidos, um processo desprovido de imparcialidade, neutralidade e rigor, bem como uma motivação geral dos profissionais em matéria de avaliação de desempenho. ABSTRACT - The evaluation of performance and its implementation are, in the current socioeconomic framing, each time more necessary as form to improve the effectiveness and the efficiency amidst the organizations. For the practical professional it is verified that the implementation of the performance evaluation, presents gaps that can compromise it. Knowing the importance of the individuals in the success of the implementation of the performance evaluation, it becomes basic to analyze its perceptions face to the model and its implementation. The problem of inquiry of this study pretends to know which the perceptions of the technicians of radiology evaluated and appraisers face to the models of evaluation of performance implanted in the Portuguese Hospitals (Hospital Curry Cabral). The purpose to the level of the management is to minimize the obstacles of implementation and to maximize the strong points. Bibliographical research on the main concepts was effectuated, after what we define the objectives of empirica inquiry: - To compare the perceptions of the radiology technicians subjected to models of performance evaluation “Pro-Activa”. Using an exploratory and descriptive approach, studied the impact of these tools used in the hospitals of the study. The methodology for collecting information to professionals out of the study based on questionnaires of both open and closed questions with a quantitative approach to nature. For analysis and data processing software was used. The main conclusions: there is the lack of training for all involved, a process devoid of impartiality, neutrality and accuracy, as well as a general motivation of the professionals regarding the evaluation of performance.

Análise comportamental : um estudo por análise de sobrevivência, aplicada a cartões de crédito

A capacidade de adaptação e rapidez de decisão, distinguem as empresas que melhor conseguem competir e crescer no mercado global. Para atuar rapidamente, as organizações precisam de sistemas de informação cada vez mais eficazes, surgindo recentemente uma nova função considerada fundamental para as empresas, que é a de Cientista de Dados. É neste contexto e para responder aos desafios atuais e futuros, que surgem sistemas de informação cada vez mais avançados, suportados por modelos de análise e visualização estatística. Este trabalho consiste em criar uma metodologia de desenvolvimento de modelos de previsão de incumprimento e perfil do consumidor, aplicado a cartões de crédito, com base numa exposição de análise comportamental, utilizando técnicas de análise de sobrevivência. São definidas técnicas de tratamento dos dados recolhidos, estimado modelo não-paramétrico de Kaplan-Meier e vários modelos de Cox de riscos proporcionais. Com recurso à curva ROC, dependente do tempo, à AUC e ao índice de Gini, conclui-se que o modelo final apresenta um desempenho positivo para identificar os clientes em situação de incumprimento ou com propensão a incumprir.

The use of computer technology to compare and analyze community college dissertations

A purpose of this research study was to demonstrate the practical linguistic study and evaluation of dissertations by using two examples of the latest technology, the microcomputer and optical scanner. That involved developing efficient methods for data entry plus creating computer algorithms appropriate for personal, linguistic studies. The goal was to develop a prototype investigation which demonstrated practical solutions for maximizing the linguistic potential of the dissertation data base. The mode of text entry was from a Dest PC Scan 1000 Optical Scanner. The function of the optical scanner was to copy the complete stack of educational dissertations from the Florida Atlantic University Library into an I.B.M. XT microcomputer. The optical scanner demonstrated its practical value by copying 15,900 pages of dissertation text directly into the microcomputer. A total of 199 dissertations or 72% of the entire stack of education dissertations (277) were successfully copied into the microcomputer's word processor where each dissertation was analyzed for a variety of syntax frequencies. The results of the study demonstrated the practical use of the optical scanner for data entry, the microcomputer for data and statistical analysis, and the availability of the college library as a natural setting for text studies. A supplemental benefit was the establishment of a computerized dissertation corpus which could be used for future research and study. The final step was to build a linguistic model of the differences in dissertation writing styles by creating 7 factors from 55 dependent variables through principal components factor analysis. The 7 factors (textual components) were then named and described on a hypothetical construct defined as a continuum from a conversational, interactional style to a formal, academic writing style. The 7 factors were then grouped through discriminant analysis to create discriminant functions for each of the 7 independent variables. The results indicated that a conversational, interactional writing style was associated with more recent dissertations (1972-1987), an increase in author's age, females, and the department of Curriculum and Instruction. A formal, academic writing style was associated with older dissertations (1972-1987), younger authors, males, and the department of Administration and Supervision. It was concluded that there were no significant differences in writing style due to subject matter (community college studies) compared to other subject matter. It was also concluded that there were no significant differences in writing style due to the location of dissertation origin (Florida Atlantic University, University of Central Florida, Florida International University).

Guide to reporting highway statistics: procedures for the compilation, analysis and reporting of: state motor-fuel, motor-vehicle, driver-license and motor-carrier data; highway finance data of state and local governments.

Mode of access: Internet.

The impact of spatial data redundancy on SOLAP query performance

Geographic Data Warehouses (GDW) are one of the main technologies used in decision-making processes and spatial analysis, and the literature proposes several conceptual and logical data models for GDW. However, little effort has been focused on studying how spatial data redundancy affects SOLAP (Spatial On-Line Analytical Processing) query performance over GDW. In this paper, we investigate this issue. Firstly, we compare redundant and non-redundant GDW schemas and conclude that redundancy is related to high performance losses. We also analyze the issue of indexing, aiming at improving SOLAP query performance on a redundant GDW. Comparisons of the SB-index approach, the star-join aided by R-tree and the star-join aided by GiST indicate that the SB-index significantly improves the elapsed time in query processing from 25% up to 99% with regard to SOLAP queries defined over the spatial predicates of intersection, enclosure and containment and applied to roll-up and drill-down operations. We also investigate the impact of the increase in data volume on the performance. The increase did not impair the performance of the SB-index, which highly improved the elapsed time in query processing. Performance tests also show that the SB-index is far more compact than the star-join, requiring only a small fraction of at most 0.20% of the volume. Moreover, we propose a specific enhancement of the SB-index to deal with spatial data redundancy. This enhancement improved performance from 80 to 91% for redundant GDW schemas.

Data partitioning for parallel spatial join processing

The cost of spatial join processing can be very high because of the large sizes of spatial objects and the computation-intensive spatial operations. While parallel processing seems a natural solution to this problem, it is not clear how spatial data can be partitioned for this purpose. Various spatial data partitioning methods are examined in this paper. A framework combining the data-partitioning techniques used by most parallel join algorithms in relational databases and the filter-and-refine strategy for spatial operation processing is proposed for parallel spatial join processing. Object duplication caused by multi-assignment in spatial data partitioning can result in extra CPU cost as well as extra communication cost. We find that the key to overcome this problem is to preserve spatial locality in task decomposition. We show in this paper that a near-optimal speedup can be achieved for parallel spatial join processing using our new algorithms.

MapScript: A map algebra programming language incorporating neighborhood analysis

Map algebra is a data model and simple functional notation to study the distribution and patterns of spatial phenomena. It uses a uniform representation of space as discrete grids, which are organized into layers. This paper discusses extensions to map algebra to handle neighborhood operations with a new data type called a template. Templates provide general windowing operations on grids to enable spatial models for cellular automata, mathematical morphology, and local spatial statistics. A programming language for map algebra that incorporates templates and special processing constructs is described. The programming language is called MapScript. Example program scripts are presented to perform diverse and interesting neighborhood analysis for descriptive, model-based and processed-based analysis.

Exploratory spatial data analysis techniques for examining urban crime

Regional planners, policy makers and policing agencies all recognize the importance of better understanding the dynamics of crime. Theoretical and application-oriented approaches which provide insights into why and where crimes take place are much sought after. Geographic information systems and spatial analysis techniques, in particular, are proving to be essential or studying criminal activity. However, the capabilities of these quantitative methods continue to evolve. This paper explores the use of geographic information systems and spatial analysis approaches for examining crime occurrence in Brisbane, Australia. The analysis highlights novel capabilities for the analysis of crime in urban regions.

Environmental data management in the Sado Estuary

Estuaries are perhaps the most threatened environments in the coastal fringe; the coincidence of high natural value and attractiveness for human use has led to conflicts between conservation and development. These conflicts occur in the Sado Estuary since its location is near the industrialised zone of Peninsula of Setúbal and at the same time, a great part of the Estuary is classified as a Natural Reserve due to its high biodiversity. These facts led us to the need of implementing a model of environmental management and quality assessment, based on methodologies that enable the assessment of the Sado Estuary quality and evaluation of the human pressures in the estuary. These methodologies are based on indicators that can better depict the state of the environment and not necessarily all that could be measured or analysed. Sediments have always been considered as an important temporary source of some compounds or a sink for other type of materials or an interface where a great diversity of biogeochemical transformations occur. For all this they are of great importance in the formulation of coastal management system. Many authors have been using sediments to monitor aquatic contamination, showing great advantages when compared to the sampling of the traditional water column. The main objective of this thesis was to develop an estuary environmental management framework applied to Sado Estuary using the DPSIR Model (EMMSado), including data collection, data processing and data analysis. The support infrastructure of EMMSado were a set of spatially contiguous and homogeneous regions of sediment structure (management units). The environmental quality of the estuary was assessed through the sediment quality assessment and integrated in a preliminary stage with the human pressure for development. Besides the earlier explained advantages, studying the quality of the estuary mainly based on the indicators and indexes of the sediment compartment also turns this methodology easier, faster and human and financial resource saving. These are essential factors to an efficient environmental management of coastal areas. Data management, visualization, processing and analysis was obtained through the combined use of indicators and indices, sampling optimization techniques, Geographical Information Systems, remote sensing, statistics for spatial data, Global Positioning Systems and best expert judgments. As a global conclusion, from the nineteen management units delineated and analyzed three showed no ecological risk (18.5 % of the study area). The areas of more concern (5.6 % of the study area) are located in the North Channel and are under strong human pressure mainly due to industrial activities. These areas have also low hydrodynamics and are, thus associated with high levels of deposition. In particular the areas near Lisnave and Eurominas industries can also accumulate the contamination coming from Águas de Moura Channel, since particles coming from that channel can settle down in that area due to residual flow. In these areas the contaminants of concern, from those analyzed, are the heavy metals and metalloids (Cd, Cu, Zn and As exceeded the PEL guidelines) and the pesticides BHC isomers, heptachlor, isodrin, DDT and metabolits, endosulfan and endrin. In the remain management units (76 % of the study area) there is a moderate impact potential of occurrence of adverse ecological effects and in some of these areas no stress agents could be identified. This emphasizes the need for further research, since unmeasured chemicals may be causing or contributing to these adverse effects. Special attention must be taken to the units with moderate impact potential of occurrence of adverse ecological effects, located inside the natural reserve. Non-point source pollution coming from agriculture and aquaculture activities also seem to contribute with important pollution load into the estuary entering from Águas de Moura Channel. This pressure is expressed in a moderate impact potential for ecological risk existent in the areas near the entrance of this Channel. Pressures may also came from Alcácer Channel although they were not quantified in this study. The management framework presented here, including all the methodological tools may be applied and tested in other estuarine ecosystems, which will also allow a comparison between estuarine ecosystems in other parts of the globe.