Orientador: Roberto de Alencar Lotufo / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-07T11:27:50Z (GMT). No. of bitstreams: 1 Sa_GustavoFerreiraCardosode_M.pdf: 2313623 bytes, checksum: ca6abbf3a186c9d5bed2d6b1e73e3a9f (MD5) Previous issue date: 2006 / Resumo: Neste trabalho são apresentadas melhorias na robustez do método FingerCode para reconhecimento de impressões digitais. No FingerCode a textura dos componentes orientados das impressões digitais são extraídas por um banco direcional de filtros Gabor. Posteriormente, os componentes orientados são setorizados e para cada setor é computado um valor. Este conjunto de valores forma o vetor de atributos. Finalmente, a média da diferença absoluta dos dois vetores de atributos é computada indicando a similaridade entre duas impressões digitais. Foram testadas várias soluções e entre as que apresentaram melhores resultados destacam-se: a substituição dos valores dos atributos através de uma função não-linear, a ponderação dos valores de atributo de acordo com características estatísticas da distribuição espacial dos valores e o cálculo de medidas estatísticas extraídas dos histogramas de distribuição de diferenças. Estas funções apresentaram um ganho significativo, principalmente para o caso dos sensores óticos com uma melhoria de aproximadamente 45% no EER. Outra contribuição apresentada foi uma nova implementação rápida do filtro Gabor 2D, que se constitui de uma onda sinusoidal modulada por um envelope gaussiano. A filtragem 2D da imagem por um banco de filtros Gabor 2D é uma das etapas de maior consumo de tempo no processamento de imagens. Na nova solução proposta, o filtro Gabor 2D é separado em dois filtros Gabor 1D ortogonais, bastando para isto que o envelope gaussiano obedeça a condição de ser circular. O processamento com o filtro separado é mais rápida do que com o filtro não-separado e o ganho na performance aumenta à medida que aumenta o tamanho da imagem ou do filtro. Também foram desenvolvidas novas técnicas de segmentação: baseada em morfologia matemática e baseada em filtros Gabor. Estas segmentações ocorrem ao nível do píxel, com ótimos resultados, principalmente após a uniformização da área através de processos morfológicos / Abstract: In this work it is introduced improvements in robustness of FingerCode method to recognize fingerprints. In the FingerCode the texture of fingerprint oriented components are extracted by a bank of directional Gabor filters. After that, the oriented components are tessellated and a value is computed for each sector. This set of values constitutes the attribute vector. Finally, the absolute difference mean between the two attribute vectors is computed that gives the similarity between two fingerprints. New solutions were tested; among them the best results were obtained by: attribute values replacement by a non-linear function, attribute values weighting by statistical characteristics of spatial distribution of values, and the calculus of statistical measures extracted from the difference distribution histograms. These functions presented a significant gain, mainly in the case of optical sensors with an improvement about 45% in EER. Another contribution presented was a new fast implementation of the 2D Gabor filter, which constitutes in a sinusoidal wave modulated by a Gaussian envelope. The 2D image filtering by a bank of 2D Gabor filters is one of the most expensive stage of image processing. In the new solution proposed, the 2D Gabor filter is separated in two orthogonal 1D Gabor filters, for this the Gaussian envelope must obey the condition of being circular. Processing with the separated filter is faster than the non-separated filter, and the gain improves as the size of image or filter increases. Also it was developed new segmentation techniques: based on mathematical morphology, and based on Gabor filters. Those segmentations occur at pixel level, with good results, mostly after the area regularization with morphological processes / Mestrado / Engenharia de Computação / Mestre em Engenharia Elétrica

The thesis treats the problem of error correction in a context free language, and the design of an error correcting parser for the BASIC language. Two important things can be said about this thesis. First, it presents the problem of error correction in a context free language, and the existing results in the field. The concept of a context free language as a model for a programming language, and the definitions and results used later are presented or reviewed. A distance between two strings is defined and used to develop a “minimum distance error correcting parser”. Second, the thesis develops two global error correcting parsers. The first one is the top-down global error correcting parser, obtained by transforming Unger’s top-down parser into an error correcting one. Then the idea of Graham and Rhodes, of condensing the surrounding context of error, is extended, and a global simple precedence error correcting parser is obtained by analysing the whole content of the error, available from the input string. These parsers, and other known methods are then used to design and partially implement an error correcting parser for BASIC.

De senaste åren har utbudet av TV-kanaler ökat och det är idag vanligt att man har tillgång till så pass många kanaler att det är svårt att överblicka dem på ett enkelt sätt. Det finns olika tekniker för att sortera fram önskvärd information till användaren, men ingen design är anpassad varken för att hantera den nya förbättrade upplösningen eller de nya intelligenta funktionerna. Detta arbete har formulerats för att få fram ett exempel på hur den förbättrade upplösningen kan utnyttjas i programguiden samt för att få ett gränssnitt mot de intelligenta funktionerna. Egenskaper för programguiden togs fram som stöd för de inledanden pappersskisserna, varefter en välgrundad och detaljerad datordesign gjordes. En implementation i skalbar vektorgrafik (SVG) gjordes i den slutgiltiga prototypen för att demonstrera animationer och användbarhet. Avslutningsvis diskuteras lärdomarna som kan tas från detta arbete. / The number of available TV channels has increased the last couple of years and it is hard to get a good overview in a simple way. There are different techniques for sorting the information so that the user gets the required information, but no design is adapted neither to handle the new improved resolution nor the new intelligent functions. This thesis has been developed to get an example on how the new improved resolution can be used in the program guide and to get an interface with the intelligent functions. Desirable qualities for the program guide were stated for the sketching phase of the design, and the sketches were subsequently used as outlines for the computer-based design of the program guide. An implementation in scalable vector graphics (SVG) was made in a final prototype to demonstrate animations and usability. Finally there is a discussion about the contributions from this thesis.

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In this paper research about dynamic scripting and the top culling difficulty scaling enhancement in the game Neverwinter Nights is investigated. A comparison between both a static and a dynamic opponent is made. The human opinion about dynamic scripting is also highlighted. To get an understanding of what the players think about and how they approach an opponent, two experiments were made. One where tests are made on a static opponent and a dynamic opponent, then a second where differences in behavior of the dynamic opponent using top culling and an ordinary dynamic opponent are analyzed. Results from the first test shows the static opponent is more preferable whereas the dynamic opponent using top culling is preferred in the second experiment. Since comparing the two experiments the results are ambiguous. The conclusion is that further investigation is needed in order to answer the question if human players prefer static or dynamic opponents when playing computer games. / I detta arbete undersöks tekniken "Dynamic Scripting" och en metod för att skala svårigheten hos motståndare, kallad "Top Culling". Detta har testats i spelet "Neverwinter Nights". En jämförelse mellan en statisk och en dynamisk motståndare har gjorts där den mänskliga synen på dynamic scripting är en huvudfaktor. För att få förståelse hur spelare tänker och bemöter olika motstånd gjordes två experiment. I ett av experimenten testas en statisk och en dynamisk motståndare. I ett annat experiment görs en analys av skillnaderna i beteende mellan en dynamisk motståndare med svårighetsskalning och en dynamisk motståndare utan. Det första experimentet gav resultat som visar att den statiska motståndaren föredras medan i det andra experimentet föredras den dynamiska motståndaren som skalade sin svårighetsgrad. Slutsatsen är att vidare undersökning krävs för att kunna besvara frågan huruvida en spelare hellre vill möta en statisk eller en dynamisk motståndare.

Detta examensarbete har utförts i samarbete med företaget Systemagic AB. Systemagic är ett teknikföretag vars expertis ligger inom mjukvaruutveckling inom IPTV-teknologi. Detta innefattar bland annat utveckling av middleware till digitalboxar, också kallade Set-top-boxar. Middleware är den mjuk- och hårdvaruinfrastruktur som sammankopplar de olika delarna av ett IPTV-system. Det är ett distribuerat operativt system som både finns på operatörens servrar samt i slutanvändarens digitalbox. Då det idag ställs allt högre krav på funktionalitet och dynamik från beställare blir utvecklingen av ett modernt middleware mycket resurskrävande. Systemagic anser att en stor bidragande orsak till den resurskrävande utvecklingsprocessen kan kopplas till användningen av scriptspråket JavaScript och är därför intresserade av alternativa metoder. Google Web Toolkit (GWT) är ett Java-ramverk som kan användas för att på ett snabbt och smidigt sätt utveckla interaktiva webbapplikationer. Detta möjliggörs genom att all utveckling sker i Java. Slutprodukten efter kompilering är standard-kompatibel HTML och JavaScript, helt oberoende av Java. Detta examensarbete har gått ut på att undersöka möjligheten att använda Java och GWT för att underlätta och potentiellt snabba upp utvecklingen av ett middleware. Målet var att undersöka om GWT kan användas rakt av för att ta fram den del av ett middleware som återfinns i slutanvändarens box, en så kallad portal, eller om ramverket måste anpassas för att de mest grundläggande funktionerna hos en box ska kunna implementeras. Rapporten beskriver frågeställningar, tillvägagångssätt, problem och  svårigheter som uppstod, de lösningar som använts samt en analys och diskussion av resultatet.

This thesis evaluates the possibility to replace the manufacturer dependent JTAG device used in the production tests of IPTV set-top boxes for storing the boot loader in the main memory in order to start the box for the first time. An FPGA based prototype was built in order to see if it is possible to record the JTAG signals, to an external DDR SDRAM, without understanding them and be able to perform a delayed playback resulting in the same bahavoir as with the original JTAG device.Overall the thesis was succesful and it shows that it is infact feasible to create a JTAG recorder based on an FPGA. A lot of data is used for storing the sequence though so the use of a fast memory is cruicial. However in this thesis the speed of both the recording and the delayed playback was reduced in order to work properly.

Purpose: The purpose of this research is to explore how CSR reporting of supply chain management indicators and metrics in the textile and apparel industry relate to the Triple Top Line framework. Design/methodology/approach: This thesis is conducted by doing a content analysis of sustainable supply chain management performance metrics and indicators in a first step which is then matched within the conceptual framework of the Triple Top Line. Finally, a content analysis of branded marketers’ and retailers’ corporate social responsibility reports is conducted using the conceptual framework as a guideline. Findings: The results showed that certain segments of the conceptual framework were under represented in the terms of sustainable supply chain management performance indicators and metrics, and that the reporting of the metrics and indicators is still lacking as a whole within the textile and apparel industry. Research limitations/implications: The limitations of the thesis are that the analysis of the CSR reports was conducted through a manifest content analysis and could be improved by using a latent approach and whilst the CSR reports of branded manufacturers and retailers were analysed, the researcher could have included the analysis of fabric and fibre producers to have an even more complete vision of the industry. Originality/value: The value of this thesis is that it offers academics and practitioners a new conceptual framework to evaluate their CSR reporting and measuring of sustainable supply chain management indicators and performance metrics.

Mid-latitude shelf-seas are highly productive regions that host a rich diversity of animals including large numbers of marine mammals and seabirds. These large vertebrate predators play a crucial role in the functioning of shelf-sea ecosystems. However, the combined effects of multiple anthropogenic stressors are driving unprecedented declines in many of their populations. Mitigating this depends upon effective conservation and integrated ecosystem based approaches to management, which require a comprehensive understanding of the habitat needs of marine predators. The foraging efficiencies of marine predators are closely tied to the availability of a number of oceanographic features. As such, these physical habitats represent critical locations within a species’ range whose preservation and protection should be of high priority. The collection of studies presented in this thesis aims to improve our understanding of the physical oceanographic processes that underlie the at-sea behaviours and distributions of marine mammals and seabirds in coastal and shelf-sea environments. A combination of at-sea boat surveying, animal-borne biologging, satellite remote-sensing, passive acoustics and numerical modelling was used to collect information on the distributions and foraging behaviours of a range of marine predators alongside the bio-physical characteristics of the oceanographic habitats they occupied. These data were then used to (1) examine the use of oceanographic habitats generated around tidal-mixing fronts and coastal topographic structures by a range of piscivorous species including bottlenose dolphins Tursiops truncatus, common dolphins Delphinus delphis, harbour porpoises Phocoena phocoena and northern gannets Morus bassanus, and (2) identify the physical processes underlying their creation. Original aspects of this work include the examination of the fine-scale bio-physical mechanisms that link marine predators to tidal-mixing fronts and coastal tidal-topographic structures. Main findings indicate that offshore habitats around tidal-mixing fronts are used by both common dolphins and northern gannets for foraging. Individuals associated with patches of increased sub-surface primary productivity, which were generated via a bi-weekly cycle of episodic turbulent mixing and stratification following an adjustment in the spatial position of a front with the spring-neap cycle. Moreover, around fronts, the dives of gannets were likely to be short and of a V-shaped strategy (with little active swim phase), which likely reflects an increase in the accessibility and catchability of their prey. In a coastal estuarine system, bottlenose dolphins were shown to associate with predictable downwelling features generated during flood tidal flows that were thought to act as a foraging aid. Together, these findings highlight the fundamental role physical oceanographic processes play in the structuring of marine ecosystems by providing vulnerable marine predators with prosperous and reliable foraging resources that they can exploit. This work has implications for both future studies of marine predator foraging ecology and the management of anthropogenic activities in coastal and shelf-seas.

The thesis aims to analyze the representation of women in the top management within companies in the Czech Republic and companies' approach towards gender diversity. Theoretical background is provided as an introduction to the topic. Terms leadership and leadership styles are defined. The thesis follows with gender leadership specifics and typical characteristics for the Czech Republic. The research part is based on the interviews with HR representatives conducted in five chosen companies. Typical managerial trajectory and gender diversity management are the key areas of the interviewed questions. The results picture a typical managerial trajectory with the emphasis on women. The thesis presents the companies' approach to the gender management and introduces activities which companies do in order to increase the number of women in their decision-making positions. Author's recommendations to the companies is included.