Thesis (M.S.)--Florida State University, 2005. / Advisor: Dr. Mike Burmester, Florida State University, College of Arts and Sciences, Dept. of Computer Science. Title and description from dissertation home page (viewed June 13, 2005). Document formatted into pages; contains viii, 35 pages. Includes bibliographical references.

Thesis (MScEng (Mathematical Sciences. Applied Mathematics))--University of Stellenbosch, 2007. / The face is one of the most characteristic parts of the human body and has been used by people for personal identification for centuries. In this thesis an automatic process for frontal face recognition from 2–dimensional images is presented based on principal component analysis. The goal is to use these concepts in eventual face–recognizing login software. The first step is detecting faces in images that are allowed a certain degree of clutter. This is achieved by skin colour detection in the HSV colourspace. This process indicates the area of the image most likely corresponding to the face. Extracting the face is achieved by morphological processing of this area of the image. The face is then normalized by a transformation that uses the eye coordinates as input. Automatic eye detection is implemented based on colour analysis of the facial images and a 91.1% success rate is achieved. Recognition of the normalized faces is achieved using eigenfaces. To calculate these, a large enough database of facial images is needed. The xm2vts database is used in this thesis as the images have very constant lighting conditions throughout – an important factor affecting the accuracy of the recognition stage. Distinction is also made between identification and verification of faces. For identification, up to 80.1% accuracy is achieved, while for verification, the equal error rate is approximately 3.5%.

Orientadora: Silvana Martinez Baraldi Artoni / Banca: Carlos Alberto Vicentini / Banca: Marcos Lania de Araújo / Banca: Maria Rita Pacheco / Banca: Vanessa Sobue Franzo / Resumo: Neste trabalho foram utilizados 14 ovinos machos adultos, seis castrados e oito não castrados da raça Santa Inês com o peso médio de 32 kg. Foi realizado estudo macroscópico (topográfico e biométrico) e microscópico (histológico) das glândulas vesiculares e bulbouretrais com o objetivo de averiguar o comportamento dessas glândulas nos animais castrados e não castrados. Para o estudo macroscópico realizou-se a descrição destas duas glândulas, e avaliou-se a biometria após a dissecação e mensuração do peso, comprimento, altura e a largura das respectivas glândulas. Para a histologia foram obtidos fragmentos das respectivas glândulas os quais foram recortados, obteu-se cortes histológicos de cinco micrômetros sendo diafanizados em benzol e processados para inclusão do material em paraplast e corados com Hematoxilina-eosina e fotodocumentados em fotomicroscópio Olympus BX 50. Morfologicamente pode-se documentar que toda a sua topografia apresentou semelhança à espécie bovina, e na biometria evidenciouse medidas macroscópicas menores (p<0,05) das glândulas de ovinos castrados em relação aos não castrados, exceto para o peso vivo dos animais e peso relativo das glândulas vesiculares (p>0,05). Histologicamente verificou-se que a glândula vesicular é um tubo enrolado sobre si mesmo seccionado em diferentes posições. Separando-o há uma delgada camada de tecido conjuntivo frouxo. A mucosa é pregueada e o epitélio é prismático simples com células altas ricas. A lâmina própria possui fibras elásticas e está envolta por uma camada muscular lisa, constituída por duas lâminas: uma interna, de fibras circulares e outra externa, de fibras longitudinais. A camada adventícia é constituída por tecido conjuntivo frouxo. Os ductos excretores principais estão revestidos por epitélio prismático biestratificado... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: In this project, 14 adult male sheep were used. six of them were castrated and eight non-castrated, and they were all Santa Ines breed, weighing 32kg in average. A macroscopic (topographic and biometric) and microscopic (histologic) study of the vesicular and bulbourethral glands was carried out with the aim of investigating the behavior of these glands in the castrated and non-castrated animals. For the macroscopic study, the description of these two glands was carried out, and the biometry after the dissecation, and weight, length, height and width measurement of the respective glands was evaluated. For the histology, fragments of these glands were obtained and cut. The obtained histological cuts of five micrometers were diaphanized in benzol and processed for the inclusion of the material in paraplast and stained with Hematoxylin and eosin and photo documented in photomicroscope Olympus BX 50. Morphologically, all its topography can be documented presenting similarity to the bovine species, and in the biometry it has evidenced smaller macroscopic measurements (p<0,05) comparing the glands of the castrated ovines and the non-castrated ones, except for the live weight of the animals and relative weight of the vesicular glands (p>0,05). Histologically, it has been verified that the vesicular gland is a tube coiled round itself sectioned at different positions. There is a thin layer of loose connective tissue separating it. The mucosa is wrinkled and the simple prismatic epithelium is composed of high cells that are rich. The blade itself has elastic fibers and is wrapped by a layer of smooth muscle, composed by two blades: an internal one, composed of circular fibers and an external one, composed of longitudinal fibers. The tunica adventitia is composed by loose connective tissue. The main excretory ducts are covered by bistratified prismatic epithelium... (Complete abstract click electronic access below) / Doutor

Orientador: Salatiér Buzetti / Banca: Marcelo Andreotti / Banca: Edson Cabral da Silva / Resumo: A adubação em soqueira de cana-de-açúcar de maiores longevidade é uma questão duvidosa, quanto à viabilidade e sua classe de resposta, principalmente quanto ao uso de composto orgânico e da adubação nitrogenada. O objetivo do trabalho foi avaliar o uso do composto orgânico e adubação de N em soqueira da cana-de-açúcar. O experimento foi conduzido em uma lavoura comercial em soqueira de cana-de-açúcar de 7o corte com a variedade SP81-3250, em Argissolo Vermelho-Amarelo distrófico, textura média, no município de Sud Mennucci - SP. O delineamento experimental foi o blocos casualizados em esquema fatorial (4 x 2) com quatro repetições, sendo os tratamentos constituídos de 4 doses (0, 2, 4 e 6 t ha-1) do composto orgânico com ou sem aplicação da dose de 50 kg ha-1 de N. Foram avaliados o estado nutricional da cana-de-açúcar, os atributos químicos do solo, as características biométricas, produtividade (TCH) e as qualidades tecnológicas da cana-de-açúcar. O composto orgânico não influenciou os teores foliares de nutrientes na cana soca. A aplicação com N não alterou os teores de macronutrientes foliares, contudo proporcionou maior teor foliar de Mn. O composto orgânico e o N não interferiram na fertilidade do solo. Os maiores valores de M.O., acidez potencial (H+Al), capacidade de troca catiônica (CTC) e teores de Fe foram verificados na camada de 0,00 - 0,20 m de profundidade, entretanto, para o pH e P os maiores valores foram constatados na camada do solo de 0,20 - 0,40 m de profundidade. O composto orgânico promoveu maior número de internódios colmo-1, propiciando efeito positivo na produtividade TCH, sem, no entanto, influenciar as qualidades tecnológicas da cana-de-açúcar. A presença de N influenciou positivamente o aumento dos números de colmos m-1, comprimento de internódios e a altura dos colmos. A aplicação de 50 kg ha-1de N diminuiu o Pol % do caldo, Pol % da cana e o ATR e aumentou a fibra / Abstract: The fertilization of sugar cane ratoon of grater longevity is a doubtful question, as viability and response class, especially regarding the use of organic compound and nitrogen fertilization. The objective this study was to evaluate the use of organic compound and nitrogen fertilization in sugar cane ratoon. The experiment was conducted at a commercial farm in sugar cane ratoon of eighth cut with the variety SP81-3250, in a sandy loam soil (Ultisol) in Sud Mennucci - SP. A randomized block design in a factorial scheme (4 x 2) with four replications, with treatments consisting of four doses (0, 2, 4 and 6 t ha-1) of organic compound with or without application of 50 kg ha-1 N was used. They were evaluated the nutritional status of sugar cane ratoon, the soil chemical properties, biometric characteristics, yield (TCH) and the technological quality of sugar cane. The compound did not affect the nutrient content in sugar cane ratoon. The N application did not alter the macronutrient leaf content, but increased the Mn leaf content. Soil fertility was not effected by organic compound and nitrogen. The highest values of organic matter, potential acidity (H + Al), cation exchange capacity (CEC) and Fe were found in the layer from 0.00 to 0.20 m depth; however, highest pH and P values were found in the soil layer from 0.20 to 0.40 m depth. The organic compound propitiated greater number of stem internode-1, providing a positive effect on productivity TCH, without; however, influencing on technological quality of sugar cane. The N application increased the number of stems m-1, internode length and height of stems, decreased the juice Pol%, sugar cane Pol%, ATR% and increased the fiber percent in the cane

With the growing installation of surveillance video cameras in both private and public areas, it is an immediate requirement to develop intelligent video analysis system for the large-scale camera network. As a prerequisite step of person tracking and person retrieval in intelligent video analysis, person re-identification, which targets in matching person images across camera views is an important topic in computer vision community and has been received increasing attention in the recent years. In the supervised learning methods, the person re-identification task is formulated as a classification problem to extract matched person images/videos (positives) from unmatched person images/videos (negatives). Although the state-of-the-art supervised classification models could achieve encouraging re-identification performance, the assumption that label information is available for all the cameras, is impractical in large-scale camera network. That is because collecting the label information of every training subject from every camera in the large-scale network can be extremely time-consuming and expensive. While the unsupervised learning methods are flexible, their performance is typically weaker than the supervised ones. Though sufficient labels of the training subjects are not available from all the camera views, it is still reasonable to collect sufficient labels from a pair of camera views in the camera network or a few labeled data from each camera pair. Along this direction, we address two scenarios of person re-identification in large-scale camera network in this thesis, i.e. unsupervised domain adaptation and semi-supervised learning and proposed three methods to learn discriminative model using all available label information and domain knowledge in person re-identification. In the unsupervised domain adaptation scenario, we consider data with sufficient labels as the source domain, while data from the camera pair missing label information as the target domain. A novel domain adaptive approach is proposed to estimate the target label information and incorporate the labeled data from source domain with the estimated target label information for discriminative learning. Since the discriminative constraint of Support Vector Machines (SVM) can be relaxed into a necessary condition, which only relies on the mean of positive pairs (positive mean), a suboptimal classification model learning without target positive data can be those using target positive mean. A reliable positive mean estimation is given by using both the labeled data from the source domain and potential positive data selected from the unlabeled data in the target domain. An Adaptive Ranking Support Vector Machines (AdaRSVM) method is also proposed to improve the discriminability of the suboptimal mean based SVM model using source labeled data. Experimental results demonstrate the effectiveness of the proposed method. Different from the AdaRSVM method that using source labeled data, we can also improve the above mean based method by adapting it onto target unlabeled data. In more general situation, we improve a pre-learned classifier by adapting it onto target unlabeled data, where the pre-learned classifier can be domain adaptive or learned from only source labeled data. Since it is difficult to estimate positives from the imbalanced target unlabeled data, we propose to alternatively estimate positive neighbors which refer to data close to any true target positive. An optimization problem for positive neighbor estimation from unlabeled data is derived and solved by aligning the cross-person score distributions together with optimizing for multiple graphs based label propagation. To utilize the positive neighbors to learn discriminative classification model, a reliable multiple region metric learning method is proposed to learn a target adaptive metric using regularized affine hulls of positive neighbors as positive regions. Experimental results demonstrate the effectiveness of the proposed method. In the semi-supervised learning scenario, we propose a discriminative feature learning using all available information from the surveillance videos. To enrich the labeled data from target camera pair, image sequences (videos) of the tagged persons are collected from the surveillance videos by human tracking. To extract the discriminative and adaptable video feature representation, we propose to model the intra-view variations by a video variation dictionary and a video level adaptable feature by multiple sources domain adaptation and an adaptability-discriminability fusion. First, a novel video variation dictionary learning is proposed to model the large intra-view variations and solved as a constrained sparse dictionary learning problem. Second, a frame level adaptable feature is generated by multiple sources domain adaptation using the variation modeling. By mining the discriminative information of the frames from the reconstruction error of the variation dictionary, an adaptability-discriminability (AD) fusion is proposed to generate the video level adaptable feature. Experimental results demonstrate the effectiveness of the proposed method.

Biometric systems are being increasingly used, from daily entertainment to critical applications such as security access and identity management. It is known that biometric systems should meet the stringent requirement of low error rate. In addition, for critical applications, the security and privacy issues of biometric systems are required to be concerned. Otherwise, severe consequence such as the unauthorized access (security) or the exposure of identity-related information (privacy) can be caused. Therefore, it is imperative to study the vulnerability to potential attacks and identify the corresponding risks. Furthermore, the countermeasures should also be devised and patched on the systems. In this thesis, we study the security and privacy issues in biometric systems. We first make an attempt to reconstruct raw biometric data from biometric templates and demonstrate the security and privacy issues caused by the data reconstruction. Then, we make two attempts to protect biometric templates from being reconstructed and improve the state-of-the-art biometric template protection techniques.

Made available in DSpace on 2014-06-11T19:31:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-12-17Bitstream added on 2014-06-13T18:41:46Z : No. of bitstreams: 1 neves_cc_dr_jabo.pdf: 2791304 bytes, checksum: 7af619b3158300bba96bd70e5b01b52a (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Neste trabalho foram utilizados 14 ovinos machos adultos, seis castrados e oito não castrados da raça Santa Inês com o peso médio de 32 kg. Foi realizado estudo macroscópico (topográfico e biométrico) e microscópico (histológico) das glândulas vesiculares e bulbouretrais com o objetivo de averiguar o comportamento dessas glândulas nos animais castrados e não castrados. Para o estudo macroscópico realizou-se a descrição destas duas glândulas, e avaliou-se a biometria após a dissecação e mensuração do peso, comprimento, altura e a largura das respectivas glândulas. Para a histologia foram obtidos fragmentos das respectivas glândulas os quais foram recortados, obteu-se cortes histológicos de cinco micrômetros sendo diafanizados em benzol e processados para inclusão do material em paraplast e corados com Hematoxilina-eosina e fotodocumentados em fotomicroscópio Olympus BX 50. Morfologicamente pode-se documentar que toda a sua topografia apresentou semelhança à espécie bovina, e na biometria evidenciouse medidas macroscópicas menores (p<0,05) das glândulas de ovinos castrados em relação aos não castrados, exceto para o peso vivo dos animais e peso relativo das glândulas vesiculares (p>0,05). Histologicamente verificou-se que a glândula vesicular é um tubo enrolado sobre si mesmo seccionado em diferentes posições. Separando-o há uma delgada camada de tecido conjuntivo frouxo. A mucosa é pregueada e o epitélio é prismático simples com células altas ricas. A lâmina própria possui fibras elásticas e está envolta por uma camada muscular lisa, constituída por duas lâminas: uma interna, de fibras circulares e outra externa, de fibras longitudinais. A camada adventícia é constituída por tecido conjuntivo frouxo. Os ductos excretores principais estão revestidos por epitélio prismático biestratificado... / In this project, 14 adult male sheep were used. six of them were castrated and eight non-castrated, and they were all Santa Ines breed, weighing 32kg in average. A macroscopic (topographic and biometric) and microscopic (histologic) study of the vesicular and bulbourethral glands was carried out with the aim of investigating the behavior of these glands in the castrated and non-castrated animals. For the macroscopic study, the description of these two glands was carried out, and the biometry after the dissecation, and weight, length, height and width measurement of the respective glands was evaluated. For the histology, fragments of these glands were obtained and cut. The obtained histological cuts of five micrometers were diaphanized in benzol and processed for the inclusion of the material in paraplast and stained with Hematoxylin and eosin and photo documented in photomicroscope Olympus BX 50. Morphologically, all its topography can be documented presenting similarity to the bovine species, and in the biometry it has evidenced smaller macroscopic measurements (p<0,05) comparing the glands of the castrated ovines and the non-castrated ones, except for the live weight of the animals and relative weight of the vesicular glands (p>0,05). Histologically, it has been verified that the vesicular gland is a tube coiled round itself sectioned at different positions. There is a thin layer of loose connective tissue separating it. The mucosa is wrinkled and the simple prismatic epithelium is composed of high cells that are rich. The blade itself has elastic fibers and is wrapped by a layer of smooth muscle, composed by two blades: an internal one, composed of circular fibers and an external one, composed of longitudinal fibers. The tunica adventitia is composed by loose connective tissue. The main excretory ducts are covered by bistratified prismatic epithelium... (Complete abstract click electronic access below)

The aim of this work was show two studies. The first one consisted of a survey on indigenous Butia from Rio Grande do Sul. Through observations of morphological characteristics, eight species were recognized (B. catarinensis Noblick & Lorenzi, B. eriospatha (Mart. ex Drude) Becc., B. exilata Deble & Marchiori, B. lallemantii Deble & Marchiori, B. odorata (Barb. Rodr.) Noblick, B. paraguayensis (Barb. Rodr.) L. H. Bailey, B. witeckii K. Soares & S. Longhi and B. yatay (Mart.) Becc.). Three were considered synonyms (B. missionera Deble & Marchiori, B. pulposa (Barb. Rodr.) Nehrl. and B. quaraimana Deble & Marchiori). B. microspadix Burret and B. stolonifera (Barb. Rodr.) Becc. was not confirmed from Rio Grande do Sul. Figures with geographical distribution, key of identification, illustrations, and comments about the biology and taxonomy of each species were provided. The second study evaluated the ecological characteristics and productive and reproductive potential of two jelly palm populations from Rio Grande do Sul, with a population of B. yatay species (from Coatepe Quaraí) and another of B. witeckii species (from Quebra-dentes Quevedos/Júlio de Castilhos). In an area of 1 ha of the first species and 2 ha of the second species, respectively 79 and 34 mature palms were found. The characterization of the number of fruits per inflorescence was based on a sample of 80 and 84 infructescenses, respectively of the B. yatay and B. witeckii species. The biometric characterization of the fruits was based on a sample of 240 and 360 fruits, respectively for the B. yatay and B. witeckii species, separated by crop and plot. The hypsometric distribution shows that two populations are seriously threatened due to lack of natural regeneration, predated by cattle. Both species showed some significant differences between biometric parameters in adult trees (except the stem circumference and number of inflorescences in B. witeckii) and their fruit, when comparing the different plots. Positive correlations were found between biometric parameters of plants and of the fruits. Biometric parameters of the palmtrees are correlate with ecological parameters observed. There was an increase in the production of fruit pulp in the year 2012 when compared with 2011 on two species.Several factors seem to influence productivity, such as weather conditions, performance of pollinators, age/size of palm, physical and chemical characteristics of the soil and density of reproductive plants. The productivity of pulp and viable seeds per adult palm shows significant difference between two species, 10.31 kg and 12.96 kg of pulp and 1388 and 1075 viable seeds per palm, respectively, for B. yatay and B. witeckii. The two species have great productive potential. / O objetivo deste trabalho foi o de realizar dois estudos. O primeiro consistiu no levantamento das espécies de Butia nativas do Rio Grande do Sul e, através de observações das características morfológicas, foram confirmadas oito espécies: B. catarinensis Noblick & Lorenzi, B. eriospatha (Mart. ex Drude) Becc., B. exilata Deble & Marchiori, B. lallemantii Deble & Marchiori, B. odorata (Barb. Rodr.) Noblick, B. paraguayensis (Barb. Rodr.) L. H. Bailey, B. witeckii K. Soares & S. Longhi e B. yatay (Mart.) Becc. Além disso, três foram consideradas sinonímias: B. missionera Deble & Marchiori, B. pulposa (Barb. Rodr.) Nehrl. e B. quaraimana Deble & Marchiori. B. microspadix Burret e B. stolonifera (Barb. Rodr.) Becc. não foram confirmadas para a flora sul-riograndense. Foram fornecidas figuras com a distribuição das espécies no estado, chave de identificação, ilustrações, e comentários acerca da biologia e da taxonomia de cada espécie. O segundo estudo avaliou os aspectos ecológicos e silviculturais de Butia yatay e Butia witeckii, sendo uma população de B. yatay, localizada na região de Coatepe Quaraí, RS, e, outra, da espécie B. witeckii, na região de Quebra-dentes Quevedos/Júlio de Castilhos, RS. Em uma área de 1 ha da primeira espécie e de 2 ha da segunda, foram registradas respectivamente 79 e 34 plantas adultas. A caracterização do número de frutos por infrutescência foi baseado numa amostra de 80 e 84 infrutescências, respectivamente das espécies B. yatay e B. witeckii. A caracterização biométrica dos frutos foi baseada numa amostra de 240 e 360 frutos, respectivamente para as espécies B. yatay e B. witeckii, sendo separadas por safra e por parcela. A distribuição hipsométrica mostrou que as duas populações estão seriamente ameaçadas devido à ausência de regeneração natural, uma vez que as plântulas são predadas pelo gado bovino. Nas duas espécies, houve diferenças significativas entre as estruturas biométricas das plantas adultas (exceto circunferência do estipe e número de infrutescências em B. witeckii) e dos seus frutos, quando se comparou as diferentes parcelas de cada população. Foram encontradas correlações positivas entre as estruturas biométricas das plantas e dos frutos. As estruturas biométricas das plantas apresentaram correlações com os dados ecológicos avaliados. Houve um aumento na produção de polpa dos frutos no ano de 2012 em relação ao ano anterior nas duas espécies; diversos fatores parecem influenciar a produtividade, como condições climáticas, atuação dos agentes polinizadores, idade/porte das palmeiras, características físicas e químicas do solo e densidade de plantas reprodutivas. Entre as espécies, a produtividade de polpa e sementes viáveis apresentou diferença significativa, sendo 10,31 kg e 12,96 kg de polpa e 1388 e 1075 sementes viáveis por butiazeiro, respectivamente para B. yatay e B. witeckii. As duas espécies apresentam grande potencial produtivo.

Made available in DSpace on 2014-06-11T19:23:59Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-06-22Bitstream added on 2014-06-13T20:51:07Z : No. of bitstreams: 1 goiozo_pfi_me_botfmvz.pdf: 543267 bytes, checksum: 76d6c0af24937d881e8bd45fcc0340b8 (MD5) / Outros / O presente estudo objetivou avaliar a influência de afecções testiculares sobre as características biométricas, morfométricas e seminais em touros. Utilizou-se 56 touros da raça Nelore, pesando entre 420 e 600 kg e com idade entre 30 e 40 meses. A mensuração do perímetro escrotal e amostras de sêmen foram coletadas em três períodos com intervalos de 15 dias, e o espermograma foi realizado por métodos convencionais e coloração de Feulgen para estimativa dos percentuais de fragmentação nuclear. Os animais foram orquiectomizados e fragmentos de testículos foram submetidos a analises bacteriológicas, histopatológicas e morfométricas. Dentre os animais avaliados, 14 não apresentaram alterações testiculares, 15 orquite bacteriana, 10 degeneração, 10 orquite inespecífica e 7 hipoplasia testicular. As médias do perímetro escrotal não apresentaram diferenças significativas entre os grupos. Os resultados das análises seminais mostraram que a motilidade em animais normais é superior aos animais com orquite inespecífica e estatisticamente semelhante aos demais grupos. Quanto ao percentual de espermatozóides normais, animais normais e animais com hipoplasia testicular, apresentaram percentuais superiores aos demais grupos. Os defeitos de cabeça espermática e fragmentação nuclear de animais com orquite inespecífica foram superiores aos animais com testículos normais e hipoplásicos, e semelhantes os outros grupos. Animais com orquite inespecífica apresentaram área de epitélio seminífero inferior aos demais grupos e área de células de Leydig superior aos animais com testículos normais. Os touros avaliados mostraram um alto índice de alterações testiculares e um alto percentual de animais inaptos para reprodução. A biometria testicular não permitiu o diagnóstico das afecções testiculares. / The present study aimed at to evaluate the testis changes influences about biometrics, morphometrics and seminal characteristics in bulls. Fifty six Nelore bulls, weighing between 420 and 600 kg and with age between 30 and 40 months were used. The scrotal perimeter measurement and semen samples were collected in three periods with intervals of 15 days, and the spermogrammes were evaluated by conventional methods and by Fuelgen stain for nuclear fragmentation evaluate. The animals were orqiectomyzeds and testis fragments were submitted to bacteriological, histhopatologicals and morphometrical analyses. Among the evaluated animals, 14 don’t showed testis changes, 15 bacterial orchitis, 10 testicular degeneration, 10 unspecific orchitis and e 7 testicular hipoplasia. The scrotal perimeter averages didn’t showed significant differences between groups. The results of the seminal analyses showed that the mobility in normal animals, it is superior to the animals with unspecific orchitis and statistically similar to the other groups. The percentage of the normal sperms in normal animals and animals with testicular hipoplasia was greater that others groups. The sperm head defects and nuclear fragmentation in animals with unspecific orchitis was greater that animals with normal and hipoplasic testis, and similar to others groups. Animals with unspecific orchitis showed somniferous epithelium area lower to others groups and Leydig cells area higher to animals with normal testicles. The bulls evaluated showed a high index of the testicular changes and a high percentage of the inapt animals to reproduction. The testicular biometric analysis don’t allowed testicular diseases diagnose.

Made available in DSpace on 2015-05-14T12:36:38Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 2501696 bytes, checksum: a1f65e686060aa68aa5e43dee1e6c0b5 (MD5) Previous issue date: 2012-07-30 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Reliable identification systems have become key components in many applications that provide services to authenticated users. Since traditional authentication methods (such as using passwords or smartcards) can be manipulated in order to bypass the systems, biometric authentication methods have been receiving more attention in recent years. One of the biometric traits is the face. The problem of recognizing faces in video and photo still is an object of research, since there are many factors that influence the detection and recognition, such as lighting, position of the face, the background image, different facial expressions, etc. One can perform face recognition using Discrete Cosine Transform (DCT). In order to adjust a face recognition system to uncontrolled environments, two improvements for it were developed in this work: a image normalization module with respect to rotation and scale, and a change in the feature extraction module through the insertion of a non-ideal low-pass filter. The system and its modifications were tested on the following face databases: UFPB, ORL, Yale, and VSoft GTAV, developed specially for the job. Tests showed the efficiency of the image normalization module, but the system still is not adequate for every environment. / Sistemas de identificação confiáveis tornaram-se componentes chaves de várias aplicações que disponibilizam serviços para usuários autenticados. Uma vez que métodos de autenticação tradicionais (como os que utilizam senhas ou smartcards) podem ser manipulados com o objetivo de burlar os sistemas, métodos de autenticação biométrica vêm recebendo mais atenção nos últimos anos. Um dos traços biométricos é a face. O problema do reconhecimento de faces em vídeo e foto é objeto de pesquisa, uma vez que existem muitos fatores que influenciam na detecção e no reconhecimento, tais como: iluminação, posição da face, imagem ao fundo, diferentes expressões faciais, etc. É possível realizar reconhecimento facial utilizando a Transformada Cosseno Discreta (DCT). Com o intuito de adequar um Sistema de Detecção e Reconhecimento de Faces a ambientes não controlados, neste trabalho foram desenvolvidas duas melhorias para ele: um módulo normalizador de imagens em relação à rotação e à escala e uma modificação na etapa de seleção de atributos, por meio da inserção de um filtro passa-baixas não ideal. O sistema e suas modificações foram testados nos bancos de faces UFPB, ORL, Yale, GTAV e Vsoft, desenvolvido especialmente para o trabalho. Os testes mostraram a eficácia do módulo de normalização da imagem, mas ainda assim o sistema não é adequado para qualquer ambiente.