Esta dissertação de mestrado versa sobre um algoritmo de detecção e de estimação de movimento robustas a rotação, escala e translação em sequências de imagens da retina em infravermelho. O algoritmo desenvolvido detecta movimentos da retina com base em medidas de distribuição estatísticas, como a entropia conjunta e a informação mútua entre os quadros adjacentes de um vídeo. A técnica de estimação de movimento inspira-se nos métodos de deslocamento de fase e na transformação log-polar para estimar os parâmetros de movimento. Esta abordagem produz uma solução robusta para este tipo de imagens intrinsecamente ruidosas e comumente utilizadas no diagnóstico e tratamento a laser do edema macular diabético. / This thesis it is about an algorithm of retinal motion detection and estimation robust to rotation, scaling and translation in infrared images sequences. This algorithm detects retinal movements based on measures of statistical distribution, such as joint entropy and mutual information between adjacent frames of a video. The technique of motion estimation is inspired by the methods of phase shift and log-polar transformation to estimate the parameters of motion. This approach yields a robust solution for this type intrinsically noisy images and commonly used in the diagnosis and laser treatment of diabetic macular edema.

Submitted by (ana.araujo@ufrpe.br) on 2016-07-05T14:28:06Z No. of bitstreams: 1 Erika Fialho Morais Xavier.pdf: 1751380 bytes, checksum: e29a62ff6bec1c7d6748c7552494f545 (MD5) / Made available in DSpace on 2016-07-05T14:28:06Z (GMT). No. of bitstreams: 1 Erika Fialho Morais Xavier.pdf: 1751380 bytes, checksum: e29a62ff6bec1c7d6748c7552494f545 (MD5) Previous issue date: 2013-04-10 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / Through the analysis of Poisson processes has been possible to perform satisfactorily some studies with data point processes counting. However, these processes are limited to the study of situations with homogeneous patterns, hardly found in actual data. This research has proposed the study of Log Gaussian Cox Processes, process that makes possible the study of patterns points heterogeneous data, with a based from Poisson process with on the realization of a Gaussian random field. We did two applications for the process, the first with simulated data of outbreaks of fire in Castilla-La Mancha, Kingdom of Spain, in order to explore the properties of the graph and computational of LGCP, and study the heterogeneity proposed by the process. The second focuses on real data of fire points and average rainfal in the Amazon Biome, Brazil, detected by satellite NOAA 15, between the years 2007 and 2011. The Inference for these processes are carried out under the Bayesian approach, using the Monte Carlo Markov Chain (MCMC). The proposed objectives of this work were completed satisfactorily, enabling future predictions about the data in the study. / Através da análise de Processos de Poisson tem sido possível realizar de forma satisfatória diversos estudos a partir de processos pontuais, com dados provenientes de contagem. Entretanto, estes processos limitam-se ao estudo de situações com padrões homogêneos, difícilmente encontrados em dados reais. Este trabalho propôs o estudo dos Processos Log Gaussianos de Cox (LGCP), processo que torna possível o estudo de dados com padrões pontuais heterogeneos a partir de uma generalização do processo de Poisson, baseado na realizaçãoo de um campo aleatório Gaussiano. Foram realizadas duas aplicações para o processo, a primeira em dados simulados de focos de incêndio em Castilla-La Mancha, Reino da Espanha, com a finalidade de explorar as propriedades gráfico-computacionais do LGCP, bem como a heterogeneidade proposta pelo processo. A segunda em dados reais de focos de calor e precipitação média de chuva no Bioma Amazônia, Brasil, detectados pelo satélite NOAA 15, entre os anos de 2007 e 2011. A inferência para esses processos é realizada sob a abordagem Bayesiana, utilizando o método de Monte Carlo em Cadeias de Markov (MCMC). Os objetivos propostos neste trabalho foram cumpridos de forma satisfatória, possibilitando previsões futuras a respeito dos dados em estudo.

Submitted by Jessica Andrade (jessicastefanysa@gmail.com) on 2018-06-25T18:21:40Z No. of bitstreams: 1 THALES.pdf: 4975032 bytes, checksum: cba8edebb4cead2492a1b616ef85e60f (MD5) / Rejected by Margareth Ferreira Pinto (margarethfpinto@hotmail.com), reason: Falta título em inglês.Palavra errada na citação. Nº de folhas erradas, (ver ficha catalográfica). on 2018-06-26T14:22:31Z (GMT) / Submitted by Jessica Andrade (jessicastefanysa@gmail.com) on 2018-06-28T17:17:31Z No. of bitstreams: 1 THALES.pdf: 4975032 bytes, checksum: cba8edebb4cead2492a1b616ef85e60f (MD5) / Approved for entry into archive by Margareth Ferreira Pinto (margarethfpinto@hotmail.com) on 2018-07-16T21:13:28Z (GMT) No. of bitstreams: 1 THALES.pdf: 4975032 bytes, checksum: cba8edebb4cead2492a1b616ef85e60f (MD5) / Made available in DSpace on 2018-07-16T21:13:28Z (GMT). No. of bitstreams: 1 THALES.pdf: 4975032 bytes, checksum: cba8edebb4cead2492a1b616ef85e60f (MD5) Previous issue date: 2016 / Ha muito se trata da necessidade de melhoramento na competitividade dos estaleiros da industria brasileira de construção naval em relação a concorrentes no ambito da industria internacional. Em grande parte, a baixa eficiência verificada neste setor da industria se da pela baixa priorização do emprego tecnologico para metodologias automatizadas para controle e diagnostico de processos de construção, por exemplo. Neste contexto, a mineração de processos vem sendo consolidada como soluções para descoberta de modelos, analise de conformidade e melhoramento de processos. Contudo, estas atividades nao são triviais, tendo como principal problematica a qualidade dos dados contidos nos logs de eventos. Este trabalho propoe uma metodologia para melhoramento de qualidade em logs de eventos originalmente caracterizados pela baixa granularidade das atividades nos aspectos quantitativos e temporal atraves do emprego de distribuições de probabilidades com a implementação de um novo software capaz de sintetizar um novo log de eventos, entao livre de tais problematicas de qualidade. Foi realizado um estudo de caso em estaleiro da industria brasileira, onde foram possibilitados experimentos de descoberta de modelos de processos com algoritmos livres e proprietarios, bem como a utilização de uma ferramenta de animação para detecção de gargalos no processo. Estes testes foram realizados com base no log de eventos original, provido pelo estaleiro e tambem sobre o log de eventos sintetico, gerado pelo software de simulação, para fins de validação da abordagem. Os resultados mostraram sucesso ao revelar a fragmentação oculta das atividades, possibilitando a descoberta de modelos fidedignos e abrindo precedente a trabalhos futuros. / The need for improvement in the competitiveness on the Brazilian shipbuilding in- dustry’s shipyards, in relation to its competitors from abroad, is not a novice issue. The low efficiency that can be verified in this section of the national industry is greatly caused by the low prioritization of technological usage in automated methodologies for control- ling and diagnosing the aseembly process, for example. In that context, process mining has been consolidated as the solution for discovering models, conformance analysis and enhancement of business processes. However, such activities are far from trivial oftenly facing log event data quality issues. This work proposes a novice methodology for the improvement of data quality in event logs that are originaly described as ungranular in the quantitative and temporal aspects, by using probability distributions with a new soft- ware implementation that is capable of synthesising a new event log, which is then free of such quality problematics. A case study has been performed in a shipyard from whithin the Brazilian industry, where various process discovery experiments have been executed with both free and proprietary algorithms. Also, a process model animation tool has been applied for bottleneck detection purposes. Such experiments were conducted based on he original event log that was provided by the shipyard’s administration office and also on the event log that has been generated by the simulation software, for validating the pre- sented approach. The results showed success in revealing the hidden fragmentation in the activities, enabling the discovery of trustworthy process models and opening precedents for future work.

O eucalipto é um gênero amplamente cultivado no Brasil desde o início do século XX. É utilizado principalmente na produção de carvão e polpa, apesar da aptidão para produção de toras para serraria. Para as espécies cultivadas no Brasil, as técnicas de manejo para serraria foram pouco desenvolvidas e delas depende a introdução efetiva da madeira serrada de eucalipto no mercado. O presente estudo objetivou identificar as variáveis do manejo florestal do Eucalyptus urophylla que determinam, física e temporalmente, a formação de madeira limpa (clear) em árvores manejadas para serraria. O experimento foi implantado em julho de 2013 na Estação Experimental de Ciências Florestais de Itatinga (E.E.C.F.I/ESALQ/USP) e consistiu de 4 espaçamentos, sendo eles (3 x 1), (3 x 2), (3 x 3) e (6 x 1,5) m. Realizou-se o primeiro inventário em janeiro de 2015, aos 18 meses de idade, com medições de atributos das árvores e dos galhos. As parcelas foram subdivididas pela metade e, também em janeiro de 2015, aplicou-se a desrama artificial (poda) até os 2,5 m do tronco em uma de cada par de subparcelas. Daí em diante foram realizadas medições de cicatrizes e incremento secundário (dendrômetros) tomadas periodicamente até fevereiro de 2016, aos 31 meses de idade. Em junho de 2015 foi feita a primeira amostragem destrutiva de toras para medição de espessura da casca e em fevereiro de 2016 uma segunda leva de toras foi amostrada e submetida a análise em laboratório. Esta amostragem não incluiu o tratamento sem poda devido à ausência de desrama natural. Toretes foram gradualmente processados em torno mecânico para observação em plano tangencial da madeira formada após a desrama artificial. Nesta etapa também mediu-se a espessura da zona de oclusão e de madeira clear. A zona de oclusão é essencialmente composta pelo exsudado secretado para proteção periférica da cicatriz na casca. A área calculada do anel de oclusão está altamente correlacionada à área do anel da casca. Portanto, a espessura da casca determina a espessura do anel de oclusão e a formação de clear se inicia quando o xilema secundário sobrepõe o ponto mais externo no plano tangencial marcado pelo exsudado. / Eucalyptus is a genus widely grown in Brazil since the beginning of the 20th century, traditionally used to produce fuel and pulp despite its potential for sawlog production. The silvicultural techniques developed for eucalyptus short rotation woody crops in Brazil have neglected essential traits for high quality sawlog production, without which eucalyptus solid wood is not marketable. The aim of the present study was to identify the variables in silvicultural management of Eucalyptus urophylla limiting, physical and temporally, clear wood formation. The experiment was established in July 2013 at the Itatinga Experimental Station, College of Agriculture \"Luiz de Queiroz\" (ESALQ), University of São Paulo (USP), Brazil, consisting of spacing trials of (3 x 1), (3 x 2), (3 x 3) e (6 x 1,5) m. Measurements o trees and branches attributes were first taken in January 2015, when trees were 18 months old. The plots were split in half (subdivided) and one of the subplots was addressed for a pruning trial in which all live and dead branches were removed to 2,5 m, also in January 2015From then on, wound occlusion and secondary growth (band dendrometers) were periodically measured until February 2016, when the trees were 31 months old. Destructive samplings were firstly carried out in June 2015, for bark thickness determination, and secondly in February 2016. The latter did not include unpruned subplots, once the trees had not yet shed the branches. Logs were debarked and processed in mechanical lathe while measurements of clear wood and occlusion zone were taken in the tangential plane. High correlation between occlusion zone ring area and bark ring area has been found. The occlusion zone of Eucalyptus urophylla is mainly composed by the exudate released by trees during the bark wound closure process. Therefore, the bark thickness establishes the occlusion ring thickness and clear wood formation starts after the secondary xylem overlaps the most external point in the tangential plane marked by the exudate.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2017-07-07T14:20:04Z No. of bitstreams: 1 2010 - Ana Cristina Nery de Castro.pdf: 706391 bytes, checksum: 9670ccf72b4782cc78fe6a9c8324261c (MD5) / Made available in DSpace on 2017-07-07T14:20:04Z (GMT). No. of bitstreams: 1 2010 - Ana Cristina Nery de Castro.pdf: 706391 bytes, checksum: 9670ccf72b4782cc78fe6a9c8324261c (MD5) Previous issue date: 2010-02-26 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The aims of this study were to analyze the clinical signs and factors associated with the seropositivity to Brucella canis in dogs admitted to a veterinary diagnosis center in the city of Rio de Janeiro. Serum samples were collected from 841 dogs, whose participation in the study was allowed by their owners. The samples were analyzed by the Agar Gel Immunodiffusion Test. The dogs were clinically examined, whilst their owners were interviewed in order to obtain data on the animals and their raising. The associations between the explanatory variables and the infection were measured using the 2 test or Fisher exact test whenever necessary. All variables with p 0.20 at the bivariate analysis were included in the multivariable analysis by logistic regression. The backward elimination method was used to select the variables for statistical modeling. The level of significance to keep a variable in the final model was set at 5%. Seventeen (17) samples (2.0%) were reagent. The following variables were selected for the modeling: dogs with access to streets (p=0.03), ectoparasite infestation (p=0.03) tick infestation (p=0.005), reproductive activity (p=0.00001), contact with animals with reproductive problems (p=0.0009), sunlight (p=0.09), owner`s gender (p=0.16) and housing (p=0.12.In the final model, the variables tick infestation (OR= 5.47, IC 1.67- 17.86), reproductive activity (OR= 9.40, IC 2.88-30.65), contact with animals with reproductive problems (OR= 7.90, IC 2.18-28.64) and presence of sunlight inside the house (OR= 0.21, IC 0.06-0.64) remained statistically associated with seropositivity to B. canis, after confusing variables were controlled.. The clinical signs associated with the infection were abortion, scrotal dermatitis, eye alterations and presence of nodules. The results of this study suggest that canine brucellosis is a rare disease also in other similar populations, being linked to the variables associated with animal handling. This reconfirms the need of a good sanitary and reproductive management to prevent and control the disease. The detection of clinical signs associated with seropositivity to B. canis highlights the importance of a good anamnesis, as well as a detailed clinical examination of the dog upon its admittance to clinics. / Os objetivos deste estudo foram analisar os sinais cl?nicos e os fatores associados ? soropositividade para Brucella canis, em c?es atendidos num centro de diagn?stico veterin?rio do Rio de Janeiro. Amostras de soro foram coletadas de 841 de c?es, admitidos no centro de diagn?stico, cujos propriet?rios permitiram a participa??o no estudo. As amostras foram analisadas pelo exame de Imunodifus?o em Gel de Agar. Os c?es foram examinados clinicamente e uma entrevista foi realizada com seus propriet?rios para obten??o de dados sobre os animais e sua cria??o. Os testes do 2 ou exato de Fisher, quando necess?rio, foram empregados para mensurar as associa??es entre as vari?veis explicativas e a presen?a de infec??o. Todas as vari?veis com p 0,20 ? an?lise bivariada foram inclu?das na an?lise multivari?vel de regress?o log?stica. O m?todo backward elimination foi utilizado para selecionar as vari?veis para a modelagem estat?stica. O n?vel de signific?ncia para manter uma vari?vel no modelo final foi estabelecido em 5%. Foram reagentes 17 (2,0%) amostras. As vari?veis, c?es com acesso ? rua (p=0,03), infesta??o por ectoparasitas (p=0,03) e carrapatos (p=0,005), atividade reprodutiva (p=0,00001), contato com animais com dist?rbios reprodutivos (p=0,0009), luz solar (p=0,09), g?nero dos propriet?rios (p=0,16) e alojamento (p=0,12) foram selecionadas para a modelagem. No modelo final, as vari?veis infesta??o por carrapatos (OR= 5,47, IC 1,67-17,86), atividade reprodutiva (OR= 9,40, IC 2,88-30,65), contato com animais com problemas reprodutivos (OR= 7,90, IC 2,18-28,64) e presen?a de luz solar na resid?ncia (OR= 0,21, IC 0,06-0,64) se mantiveram estatisticamente associadas ? soropositividade para B. canis, ap?s o controle das vari?veis de confundimento. Os sinais cl?nicos associados ? infec??o foram o abortamento, dermatite escrotal, altera??es nos olhos e ocorr?ncia de n?dulos. Os resultados desta pesquisa indicam que a brucelose canina em popula??es semelhantes ? estudada ? uma doen?a rara e associada ?s vari?veis relativas ao manejo dos animais, refor?ando a necessidade de um bom manejo sanit?rio e reprodutivo para a preven??o e controle. A detec??o de sinais cl?nicos associados com a soropositividade para B.canis ressalta a import?ncia, de uma boa anamnese do c?o, bem como um exame cl?nico minucioso quando atendidos em cl?nicas.

Made available in DSpace on 2014-06-12T18:28:47Z (GMT). No. of bitstreams: 2 arquivo646_1.pdf: 442286 bytes, checksum: 8143ec3c3a5b067f3662ed8fb12ba045 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2007 / Universidade Federal de Sergipe / A álgebra de Gauss associada à k-subálgebra de um anel polinomial k[t0; : : : ; td] gerado por um número finito de formas de mesmo grau corresponde ao anel de coordenadas homogêneo da imagem de Gauss de uma variedade projetiva uniracional sobre k. Focaremos o caso onde os geradores são monômios. Por caracterizar os menores da matriz jacobiana de um conjunto de monômios como certos n-produtos tornaremos mais concreta a natureza da álgebra de Gauss associada à subálgebra monomial correspondente. A versão reticulada destes n-produtos permite uma abordagem combinatória ao tema. Neste caminho, provaremos resultados já obtidos e estudaremos em detalhes a álgebra de Gauss associada ao conjunto dos monômios livre de quadrados de grau dois

Historically, cryptographic file systems have been several times slower than non-cryptographic file systems. This paper describes the design and implementation of a fast Cryptographic Log-structured File System on OpenBSD. We experimentally demonstrate that our pro-totype file system performs close to the Fast File System (FFS) and the Log-structured File System (LFS). To increase performance, our file system performs most encryption and decryption work during disk read and write operations. This is possible thanks to the SEAL encryption algorithm, a software optimized stream cipher that allows the en-cryption work to be performed prior to the actual data is available. We believe that our cryptographic file system design is ideal for optimal read and write performance on locally stored confidential data. / Denna uppsats beskriver utvecklingen av ett kryptografiskt log-strukturerat filsystem och vi visar genom experiment att dess prestanda är jämförbar med lokala filsystem. / Karl Knutsson Skiftesgatan 40 332 35 Gislaved Sweden

Log-boats within the Ertebölle culture have had a broad use in the society. From social usesas transport and communication devises to economical uses within hunting and fishing. Thelog-boats have been quite large, larger than log-boats in later periods. With a length of up to 10 meters and a width of 0,5-1 meter the log-boat have been big enough to carry a family andthere gear along the cost. Even though the long and narrow shape of the log-boat have made them mostly suitable for calm and shallow water they have still aloud the people of theErtebölle culture to cross major waters such as the sound between Denmark and Sweden.

Process mining aims at discovering processes by extracting knowledge about their different perspectives from event logs. The resource perspective (or organisational perspective) deals, among others, with the assignment of resources to process activities. Mining in relation to this perspective aims to extract rules on resource assignments for the process activities. Prior research in this area is limited by the assumption that only one resource is responsible for each process activity, and hence, collaborative activities are disregarded. In this paper, we leverage this assumption by developing a process mining approach that is able to discover team compositions for collaborative process activities from event logs. We evaluate our novel mining approach in terms of computational performance and practical applicability.

Syfte: Det föreligger svårigheter att undvika byggprodukter som innehåller farliga ämnen då användningen av dessa varor i vissa projekt är oundviklig spelar dokumentering en nyckelroll. Detta då spårbarhet förutsätter ett gott dokumenteringsunderlag. Genom att vidare kontrollera produkter som byggs in säkerställs det att nödvändig information finns tillgänglig för beslutsfattning och problemlösning. Detta för att möjliggöra hantering av eventuella lagstiftningsförändringar under ombyggnationer eller vid ändring av kemiska ämnens klassificering. Produktval har som ord blivit en vanligare förekomst i byggbranschen efter att Produktvalsprincipen presenterades i Miljöbalkens 2 kapitel 6 §. Produktvalsprincipen uppmanar till att produktval i så stor utsträckning som möjligt ska undvika produkter med fara för människa och miljö om de kan ersättas med mindre farliga. Syftet med arbetet är att kartlägga hur en förvaltarbyggherre inom den offentliga sektorn arbetar med produktval och undersöka vilka problem som kan uppstå kopplat till arbetet samt undersöka hur BIM kan effektivisera processen. Metod: För att upprätta arbetets teoretiska ramverk har en litteraturstudie genomförts. I arbetets fallstudie har empirin som insamlats bestått av dokumentanalys samt intervjuer med projektaktörer. Resultat: Arbetet har kartlagt förvaltarbyggherrens produktvalsprocess samt vidare hur denne ställer krav kopplat till det utförda arbetet, entreprenören genomför sedermera produktval utifrån krav samt rekommendationer i miljöprogram, administrativa föreskrifter samt rambeskrivningar och dokumenterar dessa i projektets loggbok. Problem studien funnit är att produkter ej i full utsträckning registreras utifrån satta krav. Författarna har vidare lokaliserat att i takt med att BIM-utvecklingen fortskrider kommer detta med tid möjliggöra för beställare att tillsammans med färdigställt projekt erhålla en specifik BIM-modell berikad med aktuell produktinformation (en Asset- Information-Model). Då projekterad information och inköpsinformation lagras i en BIM-modell kan en effektivare informationshantering säkerställas med hjälp av leveransspecifikationer vid överföringen av information mellan system. BIM- teknologin möjliggör vidare en effektivare uppföljning av ställda krav samt på sikt en effektivisering av processen som den genomförs idag. Konsekvenser: Rapporten ligger till grund för att tydliggöra upprättning av krav och problem relaterat till produktval under projektering och byggskede. För att produktvalsprocessen ska förlöpa på ett kvalitetsmässigt sätt bör satta krav efterföljas samt ansvariga för registrering genomgå utbildning. Rapporten föreslår att beställare genom ekonomiska incitament kopplar inköpsutbetalningar mot färdig produktdokumentering. En BIM-modell kan när mognadsgrad uppnås med fördel användas som dokumenteringsunderlag. Begränsningar: Rapportens resultat begränsas då undersökningen utförs från tidig design till och med första efterbesiktning samt att endast ett projekt har granskats. / Purpose: There are difficulties in avoiding construction products containing hazardous substances considering that the use of these products are inevitable in some projects. Documentation regarding product selection plays a key role as traceability requires thorough documentation. By adding further control of built-in-products it is ensured that necessary information is available for decision making and problem solving. This will allow the managing of possible legislative changes, during reconstruction or when chemical substances get their classification status changed. Product selection has become a more common occurrence in the construction industry since the release of Miljöbalkens second chapter 6 §, The Product selection principle (Produktvalsprincipen). This legislation has called for product selection to avoid hazardous products where they can be replaced with products less dangerous. The propose with this bachelor thesis is to map how a property developer/facility manager in the public sector transacts the work regarding product selection, map the problems related to the procedure and find a solution to the problem with the help of Building Information Modelling (BIM). Method: To create the theoretical framework of the report a literature study has been conducted. The empirical collection has been made in the form of a case study with empirical collection through interviews and document analysis. Findings: The thesis has mapped how the property developer/facility manager conducts product selection and how the property developer/facility manager sets the requirements connected to product selection. The entrepreneur documents the selected products with an outlook in set requirements in a log book. Problems the study has found are that all utilized products are not documented. The authors have further found that as BIM technology progresses it will eventually enable clients to procure specific BIM models enriched with specific product information. When information is stored in the BIM model it is possible to ensure more efficient information management with the help of information delivery specifications when transferring information in between systems. BIM technology also enables a more efficient follow up of requirements and in the long term a less labour intensive product selection process. Implications: The thesis bases the clarification of requirements and problems that the product selection consists of during the construction planning and construction stage. For the product selection to proceed with quality in mind, set requirements should be followed and the ones responsible for documenting products should undergo adequate training. The thesis proposes clients to connect economic incentives to purchase payments when product documentation is complete. A BIM-model can when maturity level is achieved compile of- and be utilized as product documentation. Limitations: The thesis result is limited in the sense that the investigations that has been conducted has examined the construction phase from early design to final inspection and has studied one project alone.