[pt] Esta dissertação tem como objetivo avaliar os métodos de fusão de escores mais importantes na combinação de dois sistemas uni-modais de reconhecimento em voz e imagens faciais. Para cada sistema uni-modal foram implementadas duas técnicas de classificação: o GMM/UBM e o I-Vetor/GPLDA para voz e o GMM/UBM e um classificador baseado em LBP para imagens faciais. Estes sistemas foram combinados entre eles, sendo 4 combinações testadas. Os métodos de fusão de escores escolhidos se dividem em três grupos: Fusão baseada em densidade, fusão baseada em transformação e fusão baseada em classificadores, e foram testadas algumas variantes para cada grupo. Os métodos foram avaliados em modo de verificação, usando duas bases de dados, uma base virtual formada por duas bases uni-modais e outra base bimodal. O resultado de cada técnica bimodal empregada foi comparado com os resultados das técnicas uni-modais, percebendo-se ganhos significativos na acurácia de reconhecimento. As técnicas de fusão baseadas em densidade mostraram os melhores resultados entre todas as outras técnicas, mais apresentaram uma maior complexidade computacional por causa do processo de estimação da densidade. / [en] The main objective of this dissertation is to compare the most important approaches for score-level fusion of two unimodal systems consisting of facial and independent speaker recognition systems. Two classification methods for each biometric modality were implemented: a GMM/UBM and an I-Vector/GPLDA classifiers for speaker independent recognition and a GMM/UBM and LBP-based classifiers for facial recognition, resulting in four different multimodal combination of fusion explored. The score-level fusion methods investigated are divided in Density-based, Transformation-based and Classifier-based groups and few variants on each group are tested. The fusion methods were tested in verification mode, using two different databases, one virtual database and a bimodal database. The results of each bimodal fusion technique implemented were compared with the unimodal systems, which showed significant recognition performance gains. Density-based techniques of fusion presented the best results among all fusion approaches, at the expense of higher computational complexity due to the density estimation process.

The aim of this research was to make recommendations how parents and educators can select and use audio-visual media for supporting learners with behavioural problems (LBP). A literature study was conducted on behavioural problems and on the use of audio-visual media to address these. Thereafter an empirical investigation was done by means of a case study design. A purposive sample was chosen from Grades 10 and 12 learners in Pietermaritzburg. Websites were also selected for addressing a variety of topics. The most important findings were that audio-visual media can be selected by means of five criteria related to content accuracy and appropriateness, diversity and quality. The findings indicate that visual media can stimulate cognitive skills (including problem solving and critical thinking) and reflection about the acceptance of responsibility, positive attitudes and respect for authority, among others. It is concluded that audio-visual media can be used by educators to support LBP. / Educational Studies / M.Ed. (Specialisation in Psychology of Education)

This thesis evaluates the possibility of using objective measurements to assess the postural function of abdominal muscles. The theoretical part provides an overview of findings regarding postural function of the abdominal muscles and the context for their co-activation using intra-abdominal pressure. The results are summarized in the form of research studies relating postural function and low back pain (LBP). The overview of the methods used to measure intra-abdominal pressure and the abdominal muscle activity is the main focus. In this section, we present a new methodology for measuring the activity of the abdominal muscles by using pressure sensors attached to the abdominal wall in the areas of the groin and the lumbar triangle. Methodology: In the experimental part, we tested 35 healthy subjects (average age 21.26t, SD ± 1,62) in 3 posturally different seated scenarios: 1. resting breathing, 2. with added external load (the subjects held a dumbbell 20% of their body weight) and 3. with maximum voluntary increase in intra-abdominal pressure (the diaphragm test). Results: An independent samples t-test indicated that the pressure created by the abdominal wall for both sensors in situation resting breathing increases in situation external load (HA1: upper sensor p=0.0079, lower sensor p=0.0009). We...

Abstract Image description plays an important role in representing inherent properties of entities and scenes in static images. Within the last few decades, it has become a fundamental issue of many practical vision tasks, such as texture classification, face recognition, material categorization, and medical image processing. The study of static image analysis can also be extended to video analysis, such as dynamic texture recognition, classification and synthesis. This thesis contributes to the research and development of image and video analysis from two aspects. In the first part of this work, two image description methods are presented to provide discriminative representations for image classification. They are designed in unsupervised (i.e., class labels of texture images are not available) and supervised (i.e., class labels of texture images are available) manner, respectively. First, a supervised model is developed to learn discriminative local patterns, which formulates the image description as an integrated three-layered model to estimate an optimal pattern subset of interest by simultaneously considering the robustness, discriminative power and representation capability of features. Second, in the case that class labels of training images are unavailable, a linear configuration model is presented to describe microscopic image structures in an unsupervised manner, which is subsequently combined together with a local descriptor: local binary pattern (LBP). This description is theoretically verified to be rotation invariant and is able to provide a discriminative complement to the conventional LBPs. In the second part of the thesis, based on static image description and deformable image registration, video analysis is studied for the applications of dynamic texture description, synthesis and recognition. First, a dynamic texture synthesis model is proposed to create a continuous and infinitely varying stream of images given a finite input video, which stitches video clips in the time domain by selecting proper matching frames and organizing them into a logical order. Second, a method for the application of facial expression recognition, which formulates the dynamic facial expression recognition problem as the construction of longitudinal atlases and groupwise image registration problem, is proposed. / Tiivistelmä Kuvan deskriptiolla on tärkeä rooli staattisissa kuvissa esiintyvien luontaisten kokonaisuuksien ja näkymien kuvaamisessa. Viime vuosikymmeninä se on tullut perustavaa laatua olevaksi ongelmaksi monissa käytännön konenäön tehtävissä, kuten tekstuurien luokittelu, kasvojen tunnistaminen, materiaalien luokittelu ja lääketieteellisten kuvien analysointi. Staattisen kuva-analyysin tutkimusala voidaan myös laajentaa videoanalyysiin, kuten dynaamisten tekstuurien tunnistukseen, luokitteluun ja synteesiin. Tämä väitöskirjatutkimus myötävaikuttaa kuva- ja videoanalyysin tutkimukseen ja kehittymiseen kahdesta näkökulmasta. Työn ensimmäisessä osassa esitetään kaksi kuvan deskriptiomenetelmää erottelukykyisten esitystapojen luomiseksi kuvien luokitteluun. Ne suunnitellaan ohjaamattomiksi (eli tekstuurikuvien luokkien leimoja ei ole käytettävissä) tai ohjatuiksi (eli luokkien leimat ovat saatavilla). Aluksi kehitetään ohjattu malli oppimaan erottelukykyisiä paikallisia kuvioita, mikä formuloi kuvan deskriptiomenetelmän integroituna kolmikerroksisena mallina - tavoitteena estimoida optimaalinen kiinnostavien kuvioiden alijoukko ottamalla samanaikaisesti huomioon piirteiden robustisuus, erottelukyky ja esityskapasiteetti. Seuraavaksi, sellaisia tapauksia varten, joissa luokkaleimoja ei ole saatavilla, esitetään työssä lineaarinen konfiguraatiomalli kuvaamaan kuvan mikroskooppisia rakenteita ohjaamattomalla tavalla. Tätä käytetään sitten yhdessä paikallisen kuvaajan, eli local binary pattern (LBP) –operaattorin kanssa. Teoreettisella tarkastelulla osoitetaan kehitetyn kuvaajan olevan rotaatioinvariantti ja kykenevän tuottamaan erottelukykyistä, täydentävää informaatiota perinteiselle LBP-menetelmälle. Työn toisessa osassa tutkitaan videoanalyysiä, perustuen staattisen kuvan deskriptioon ja deformoituvaan kuvien rekisteröintiin – sovellusaloina dynaamisten tekstuurien kuvaaminen, synteesi ja tunnistaminen. Aluksi ehdotetaan sellainen malli dynaamisten tekstuurien synteesiin, joka luo jatkuvan ja äärettömän kuvien virran annetusta äärellisen mittaisesta videosta. Menetelmä liittää yhteen videon pätkiä aika-avaruudessa valitsemalla keskenään yhteensopivia kuvakehyksiä videosta ja järjestämällä ne loogiseen järjestykseen. Seuraavaksi työssä esitetään sellainen uusi menetelmä kasvojen ilmeiden tunnistukseen, joka formuloi dynaamisen kasvojen ilmeiden tunnistusongelman pitkittäissuuntaisten kartastojen rakentamisen ja ryhmäkohtaisen kuvien rekisteröinnin ongelmana.

Submitted by Nadir Basilio (nadirsb@uninove.br) on 2018-06-15T13:56:37Z No. of bitstreams: 1 Adriana de Brito.pdf: 2322726 bytes, checksum: 952b5de2e151ee3aa44078fcedc7300a (MD5) / Made available in DSpace on 2018-06-15T13:56:37Z (GMT). No. of bitstreams: 1 Adriana de Brito.pdf: 2322726 bytes, checksum: 952b5de2e151ee3aa44078fcedc7300a (MD5) Previous issue date: 2016-03-02 / The aging changes the activation and proliferation of satellite cells and inflammatory cells in skeletal muscle and fibroblasts promotes increased, decreased vascularization and thickening of the basal lamina. The aim of this study was to evaluate the effects of LBP on the tibialis anterior (TA) muscle of aged rats after cryoinjury on morphological, on the expression of IL-6 and IL-1 beta, distribution and collagen organization. It was performed histological photomicrographs of the TA muscle stained with hematoxylin-eosin, Picrosirius Red, and immunohistochemistry for IL-6 and IL-1beta. The results were quantitatively and qualitatively in Image J software. The study was approved by CEUA-UNINOVE and were used n= 30 legs of male rats Wistar divided into 03 experimental groups: - Group 1 Control (n= 4): animals uninjured or LBP-treated; Group 2 cryoinjury LBP untreated (n= 13) and Group 3 treated with LBP infrared cryoinjury (n= 13). The LBP was applied to muscle after 2h of induction of injury and consisted of daily application until the day of sacrifice (Groups 1, 3 or 7 days) according to the study group. We were using the parameters (λ = 780nm, 1000mW / cm2 power density, power 40mW; 3,2J total energy, time of 10s). In histomorphological analysis, seven days the treated group had a significant decrease in infiltration of inflammatory cells and increased immature fibers and new blood vessels compared to Group 7 days did not-treated (p <0.05). In the analysis of distribution and collagen organization, there was a control group difference from the group treated 7 days and non-treated (p <0.05). The expression of IL-6 by immunohistochemistry, was higher in all study groups (p <0.05) compared to control, but there was no difference between the groups treated injured or not. The IL-1beta expression, there was increased expression in 3 days treated compared to group 1 and 7 days treated. In conclusion, the LPB shown modulatory effect on muscle repair process in aged animals. / O envelhecimento altera a ativação e proliferação de células satélites e células inflamatórias no músculo esquelético e promove o aumento de fibroblastos, diminuição da vascularização e espessamento da lâmina basal. O objetivo do presente estudo foi avaliar os efeitos do LBP no músculo tibial anterior (TA) de ratos idosos após criolesão sobre os aspectos morfológicos, sobre a expressão de Il-6 e IL-1 beta, a distribuição e organização do colágeno. Foi realizada fotomicrografia histológica do músculo TA corados com HE, Picrosirius Red e Imunohistoquímica para IL-6 e IL-1 beta. Os resultados foram quantitativa e qualitativamente no software Image J. O estudo foi aprovado pelo CEUA-UNINOVE e foram utilizadas n=30 patas de ratos machos Wistar distribuídas em 03 grupos experimentais: - Grupo 1 Controle (n=4): animais não lesionados ou tratados com LBP; Grupo 2 Criolesão sem tratamento LBP (n= 13) e Grupo 3 Criolesão tratado com LBP infravermelho (n=13). O LBP foi aplicado no TA após 2h da indução da lesão e consistiu de aplicações diárias até o dia do sacrifício (grupos 1, 3 ou 7 dias) de acordo com o grupo estudado. Foram utilizando os parâmetros (λ= 780nm; 1000mW/cm2 densidade de potência; 40mW de potência; 3,2J de energia total; tempo de 10s). Na análise histomorfológica, o grupo 7 dias tratado teve diminuição significantes de infiltrado de células inflamatórias e aumento de fibras imaturas e novos vasos sanguíneos, comparado ao grupo 7 dias não-tratado (p<0,05). Na análise da distribuição e organização do colágeno, houve diferença do grupo controle em relação ao grupo 7 dias tratado e não-tratado (p<0,05). A expressão de IL-6 por imunohistoquímica, foi maior em todos os grupos estudos (p<0,05) comparado ao controle, porém não houve diferença entre os grupos lesionados tratados ou não. Quanto a expressão de IL-1 beta, houve aumento da expressão em 3 dias tratados comparados ao grupo 1 e 7 dias tratados. Em conclusão, o LPB demonstrou efeito modulatório no processo de reparo muscular em animais idosos.

This master's thesis deals with face detection on mobile phones with Android OS. The introduction describes some algorithms used for pattern detection from image, as well as various techniques of features extracting. After that Android platform development specifics, including basic description of development tools, are described. Architecture of SIMD is introduced in next part of this work. After acquiring basic knowleage analysis and implementation of final app are descrited. Performance tests are conducted whose results are summarized in the conclusion.

No description available.

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal. / L'algue unicellulaire Gonyaulax polyedra est notre modèle pour l'étude des mécanismes reliant l'horloge interne aux rythmes circadiens observés. La bioluminescence, présente lors de la phase de nuit, ainsi que la division cellulaire observée au début de la phase de jour sont les deux rythmes sur lesquels porte la présente étude. Chez Gonyaulax, la présence des protéines LBP et luciférase, limitée à la phase obscure, permet la production de lumière. Une régulation au niveau de la traduction par une protéine inhibitrice CCTR se fixant en région 3 de l'ARNm LBP permet l'expression cyclique de la protéine LBP in vivo chez Gonyaulax polyedra . La construction d'une banque d'ADNc dans un vecteur d'expression constitutive (le p425 GPD) représente l'outil nécessaire pour l'isolation d'un ADNc codant pour la protéine CCTR. Cette isolation repose sur un mécanisme moléculaire d'interaction in vivo de la protéine CCTR avec la région régulatrice de l'ARNm lbp annexée à un gène létal inductible (le gène GSP1) dans la construction du plasmide pCS7. La transformation de levure possédant le pCS7 avec la banque d'ADNc permettrait la production de CCTR actif dans la levure et ainsi l'inhibition de la traduction de l'ARNm GSP1 par fixation du CCTR à la région régulatrice de lbp. Le criblage d'une banque d'ADNc comportant 2,8 x 105clones a été effectué. La croissance de 127 colonies a été observée lors du premier criblage de la banque. Chaque colonie a été soumise à une extraction d'ADN plasmidique et les plasmides obtenus ont été utilisés pour une seconde transformation dans les levures porteuses du pCS7. Le second criblage nous a permis de constater qu'aucun de ces positifs ne peut produire une protéine CCTR fonctionnelle. Une contamination par des levures d'une autre souche ou par une source de carbone permettant la croissance (telle que le glucose), une présence de "révertants" ou le clonage d'un ADNc codant pour le facteur de sélection du pCS7 peuvent être à l'origine de ces "faux positifs" obtenus. La production de clones supplémentaires afin d'augmenter statistiquement les chances de représentation d'un gène impliqué dans la génération d'un rythme circadien, ainsi que la transformation répétée de la banque dans les mêmes cellules pour permettre de réunir les différentes composantes qui pourraient être nécessaires à la formation d'un CCTR actif, pourraient permettre d'isoler un ADNc codant pour une protéine CCTR active. Chez la majorité des dinoflagellés on observe la présence d'une phase S dans le cycle cellulaire. De plus, chez Gonyaulax, la division cellulaire est limitée à l'aurore. Il est donc probable que la protéine kinase p34œk2qui régule la formation de l'hétérodimère MPF (impliqué dans l'initiation de la division cellulaire) soit également sujette à une régulation par l'horloge circadienne. L'isolation d'un homologue de la protéine kinase p34ede2repose sur une technique de clonage par compensation d'une mutation. Les levures de la souche cdc28 ne peuvent se diviser normalement à température restrictive de 34°C à cause d'une mutation thermosensible de la protéine kinase p34edc2. La transformation de la banque d'ADNc construite dans des levures de cette souche, puis l'incubation à température restrictive, permet le criblage pour un homologue de la p34cdc2. Le premier criblage de la banque a permis la croissance de sept colonies qui ont toutes été soumises à une extraction d'ADN plasmidique puis à une retransformation dans les cellules de la souche cdc28. Aucun des positifs n'a franchi le seuil de ce second test. Le criblage de clones supplémentaires ou encore le criblage pour un homologue de la cycline (la seconde composante du MPF) pourrait permettre d'isoler directement ou indirectement l'homologue de la p34cdc2.

The main aim of the presented diploma thesis was to record objective and subjective changes after therapy with DNS concept in a group of 13 people with LBP. Moiré projection topography was used to record postural changes after 5.5 week therapeutic intervention. It was not clear, whether DNS exercise would help them to achieve visible postural changes and whether this technique is able to record these changes, which would mean that it is a suitable option for objectivisation of therapies focusing on correction of stabilisation and postural functions. Pedoscan was used for further objectivisation of the effect of DNS concept. The chosen correlate of the mentioned objective evaluation was Oswestry disability index, evaluating limitations of common everyday activities resulting from pain in the lower back, and the Numeric pain scale. Patients underwent 5 hour-long physiotherapeutic lessons, the recommended frequency of exercises in the household environment was 3-4 times per day. The probands exercised with the use of DNS concept according to the individual examination findings, especially in the area of the integrated spine stabilisation system. The data were statistically elaborated by Wilcoxon Signed-Rand test, which a non-parametric variant of the pair T-test. It is obvious from the results that...

The main target of this thesis was to detect objective changes in the implementation of four postural locomotor tests DNS and during walking. The movements were recorded using the optical MoCap - the kinematic analysis Qualisys. The particular interest of the investigation was to determine the current stabilization of the spine system in individual subjects aged 25 to 55 years, which was documented by means of the angular deflection of each segment, the flat segment deviation or the shift of the marker in a coordinate system. The measurement results were compared between ten individuals with LBP and ten persons without any difficulty who were placed into the control group. The data were collected using the software QTM and Visual3D and subsequently were statistically processed. A statistically significant difference was observed during walking when comparing the angular deflection of the pelvis to the chest at the rotation and lateroflexion (ř). The significant difference of the pelvis shift toward the chest during flexion and rotation (ř) was showed in a deep squat test, but the difference was not confirmed in lateroflexion (ř). Furthermore, no statistical difference of the lateral deflection of the same segment (pelvis or chest) (cm) in patients with LBP compared to all subjects during the...