Orientador: Mario Francisco R. Gabrielli / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-07-25T16:11:48Z (GMT). No. of bitstreams: 1 Moreira_RogerWilliamFernandes_D.pdf: 6543331 bytes, checksum: d4d534d62c84d47d6af3e409226ef65d (MD5) Previous issue date: 1999 / Resumo: Foram avaliadas 2'0 mulheres leucodermas, brasileiras, com harmonia facial, modelos profissionais, que receberam análise facial conforme descrita por STELLA (1996) e PASSERI (1999). Por meio de telerradiografias tomadas em norma lateral, as análises cefalométricas de LEGAN & BURSTONE (1980) e MCNAMARA JR (1984) foram aplicadas. Os resultados obtidos foram tabulados, analisados estatisticamente e comparados com os valores originais descritos nas análises empregadas, permitindo concluir que: 1) apesar dos diferentes aspectos faciais e oclusais da amostra, as proporções verticais da face guardaram relação de 1/1/1, entre os três terços faciais, em média; 2) a análise facial revelou, nas mulheres estudadas, menores dimensões transversais do terço médio da face, com diferença estatisticamente significativa, em relação à literatura; 3) as medidas cefalométricas relativas aos dois terços inferiores do terço inferior da face, na análise de LEGAN & BURSTONE (1980), que refletem a posição do incisivo inferior e do lábio inferior apresentaram se estatisticamente diferentes dos valores descritos pelos autores; 4) para as medidas ósseas apresentadas por MCNAMARA JR (1984), que são as comumente utilizadas no plamejamento ortodôntico cirúrgico, não houve diferenças estatisticamente significativas em relação aos valores obtidos para a amostra considerada; 5) a variabilidade para as proporções consideradas na análise facial foi em , geral menor que para as medidas isoladas; 6) o valor médio do ângulo nasolabial para a amostra estudada foi de 107,8°; 7) a expostção média radiográfica do incisivo central superior foi de 4,15 mm. O valor , médio obtido clinicamente foi de 0,87 mm, em repouso, e 9,05, 'fllm / Abstract: Twenty white Brazillian females, professional models presenting good facial balance, were studied by means of facial analysis, as described by STELLA (1996) and PASSERI (1999). The cephalometric analysis of LEGAN & BURSTONE (1980) and MCNAMARA JR (1984) , isolated measurements for the facial analysis; 6) the mean value for were applied to lateral cephalograms. Results were statistically analyzed and compared with the original values as described for the considered methods, allowing the following conclusions: 1) facial proportions were 1/1/1 for the three facial thirds; 2) facial analysis revealed smaller transverse values for the middle third horizontal measurements with statistically significant differences in relation to the literature; 3) measurements relative to the two inferior thirds of the lower facial third, which reflected the position of the inferior incisor and lower lip, were statistically different from those described by LEGAN & BURSTONE (1980); 4) the MCNAMARA JR analysis (1984) values presented no statistically significant differences from those described by the author; 5) facial proportions were less variable than absolut the nasolabial angle was 107,8°; 7) Mean radiographic upper incisor exposure was 4,15 mm. The mean clinical measurement was 0,87 mm n repose and 9,05 mm in smiling / Doutorado / Cirurgia Buco-Maxilo-Facial / Doutor em Clínica Odontológica

Orientador: Ivonne Panhoca / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas / Made available in DSpace on 2018-08-04T04:53:17Z (GMT). No. of bitstreams: 1 Biasotto_DaianaCristina_M.pdf: 3915816 bytes, checksum: 54f7b18c4bb69e0695caab1a7e4aad05 (MD5) Previous issue date: 2005 / Resumo: Este trabalho teve como objetivo avaliar a correlação entre os resultados obtidos na palpação e os dados obtidos no exame eletromiográfico do músculo masseter. Participaram deste estudo 21 adultos jovens do sexo feminino, idades entre 17-25 anos. Os dados da avaliação fonoaudiológica foram obtidos por meio da palpação do músculo masseter por dois fonoaudiólogos durante a contração isométrica e os dados eletromiográficos foram captados com a utilização de eletrodos de superficie bipolares posicionados no músculo masseter durante a contração isotônica, sendo os voluntários orientados a mastigar bilateral e simultaneamente o material Parafilme@.O estudo da atividade elétrica do músculo mastigatório foi analisado pelo valor de RMS (Root Mean Square) na contração isotônica do músculo. Todos os dados foram submetidos à análise estatística Kappa. Os resultados deste estudo indicaram baixa correlação entre a palpação e a eletromiografia (25%) e entre avaliadores (40%) concluindo-se, a partir dos achados do presente estudo, que a correlação entre os dados obtidos na palpação do músculo masseter em relação aos dados obtidos no exame eletromiográfico foi muito baixa. Os resultados indicam que a palpação muscular não substitui o exame eletromiográfico, devendo complementá-lo / Abstract: This paper aimed the evaluation of the specificity of the masseter muscle palpation when compared to the electromyographic activity. Twenty-one young female adults, aged from 17 to 25, participated in this research. The phonoaudiological evaluation data were obtained by means of palpation of the masseter muscle during isometric contraction by two phonoaudiologists and the caption of the electromyographic exam was made by using the bipolar superficial electrodes, positioned on the masseter muscle. The volunteers were oriented to chew the Parafilm Mâ material bilaterally and simultaneously. The caption of the electromiographic signals occurred during the isometric contractions of the masseter muscle. The electrical activity study of the masticatory muscle was analyzed through the Root Mean Square value during isotonic contraction of the muscle. All data was then submitted to the Kappa statistical analysis. The results of this study have shown a low correlation between palpation and electromyography (25%) and between the evaluators (40%) which led to the conclusion that the correlation between palpation of the masseter muscle and the electromyographic activity was very low, which allow us to conclude that muscular palpation can not effectively replace the eletromyographycal exam but complement it / Mestrado / Saude da Criança e do Adolescente / Mestre em Saude da Criança e do Adolescente

No description available.

Image-based face recognition has attained wide applications during the past decades in commerce and law enforcement areas, such as mug shot database matching, identity authentication, and access control. Existing face recognition techniques (e.g., Eigenface, Fisherface, and Elastic Bunch Graph Matching, etc.), however, do not perform well when the following case inevitably exists. The case is that, due to some variations in imaging conditions, e.g., pose and illumination changes, face images of the same person often have different appearances. These variations make face recognition techniques much challenging. With this concern in mind, the objective of my research is to develop robust face recognition techniques against variations. This thesis addresses two main variation problems in face recognition, i.e., pose and illumination variations. To improve the performance of face recognition systems, the following methods are proposed: (1) a face feature extraction and representation method using non-uniformly selected Gabor convolution features, (2) an illumination normalization method using adaptive region-based image enhancement for face recognition under variable illumination conditions, (3) an eye detection method in gray-scale face images under various illumination conditions, and (4) a virtual pose generation method for pose-invariant face recognition. The details of these proposed methods are explained in this thesis. In addition, we conduct a comprehensive survey of the existing face recognition methods. Future research directions are pointed out. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate

To date, relatively little research has investigated participants’ ability to monitor their memory for faces and names. Four experiments were conducted with aim of developing a comprehensive profile of memory monitoring performance during face identification tasks. In each experiment, memory monitoring judgements were solicited during encoding and/or retrieval of unfamiliar face-name pairs. In general, subjective estimates of future and past memory performance were valid predictors of objective memory performance, regardless of whether a face or name was the item to be retrieved from memory. As a test of the stability of memory monitoring accuracy across different categories of stimuli, memory monitoring for face-name pairs was compared with noun-noun pairs. The predictive validity of estimates of future memory performance was similar across the categories of stimuli, but the predictive validity of estimates of past memory performance was superior for nouns compared with names. A subset of the studies examined the influence of face and name distinctiveness on memory and memory monitoring for face-name associations. This was done in an attempt to identify sources of information that individuals might use to monitor their memory during face-name learning. The beneficial effects of distinctiveness on associative memory were symmetrical between faces and names, such that relative to their typical counterparts, distinct faces enhanced memory for names, and distinct names enhanced memory for faces. These effects were also apparent in memory monitoring. Estimates of future and past memory performance were greater for face-name associations that contained a distinct face or name compared with a typical face or name, regardless of whether the distinct item was a cue or target. Moreover, the predictive validity of prospective monitoring improved with name distinctiveness, whereas the predictive validity of retrospective monitoring improved with facial distinctiveness. Altogether, the results of the dissertation indicate that participants can monitor their memory for faces and names at a level above chance, that retrospective metamemory is more accurate for nouns compared with names, and that distinctiveness not only affects the strength of the association between a face and a name, but also the ability to monitor that association.

This thesis presents a real-time multi-face tracking system, which is able to track multiple faces for live videos, broadcast, real-time conference recording, etc. The real-time output is one of the most significant advantages. Our proposed tracking system is comprised of three parts: face detection, feature extraction and tracking. We deploy a three-layer Convolutional Neural Network (CNN) to detect a face, a one-layer CNN to extract the features of a detected face and a shallow network for face tracking based on the extracted feature maps of the face. The performance of our multi-face tracking system enables the tracker to run in real-time without any on-line training. This algorithm does not need to change any parameters according to different input video conditions, and the runtime cost will not be affected significantly by an the increase in the number of faces being tracked. In addition, our proposed tracker can overcome most of the generally difficult tracking conditions which include video containing a camera cut, face occlusion, false positive face detection, false negative face detection, e.g. due to faces at the image boundary or faces shown in profile. We use two commonly used metrics to evaluate the performance of our multi-face tracking system demonstrating that our system achieves accurate results. Our multi-face tracker achieves an average runtime cost around 0.035s with GPU acceleration and this runtime cost is close to stable even if the number of tracked faces increases. All the evaluation results and comparisons are tested with four commonly used video data sets.

Perception and recognition of faces are fundamental cognitive abilities that form a basis for our social interactions. Research has investigated face perception using a variety of methodologies across the lifespan. Habituation, novelty preference, and visual paired comparison paradigms are typically used to investigate face perception in young infants. Storybook recognition tasks and eyewitness lineup paradigms are generally used to investigate face perception in young children. These methodologies have introduced systematic differences including the use of linguistic information for children but not infants, greater memory load for children than infants, and longer exposure times to faces for infants than for older children, making comparisons across age difficult. Thus, research investigating infant and child perception of faces using common methods, measures, and stimuli is needed to better understand how face perception develops. According to predictions of the Intersensory Redundancy Hypothesis (IRH; Bahrick & Lickliter, 2000, 2002), in early development, perception of faces is enhanced in unimodal visual (i.e., silent dynamic face) rather than bimodal audiovisual (i.e., dynamic face with synchronous speech) stimulation. The current study investigated the development of face recognition across children of three ages: 5 – 6 months, 18 – 24 months, and 3.5 – 4 years, using the novelty preference paradigm and the same stimuli for all age groups. It also assessed the role of modality (unimodal visual versus bimodal audiovisual) and memory load (low versus high) on face recognition. It was hypothesized that face recognition would improve across age and would be enhanced in unimodal visual stimulation with a low memory load. Results demonstrated a developmental trend (F(2, 90) = 5.00, p = 0.009) with older children showing significantly better recognition of faces than younger children. In contrast to predictions, no differences were found as a function of modality of presentation (bimodal audiovisual versus unimodal visual) or memory load (low versus high). This study was the first to demonstrate a developmental improvement in face recognition from infancy through childhood using common methods, measures and stimuli consistent across age.

This master‘s thesis describes the identification faces in real terms. It includes an overview of current methods of detection faces by the classifiers. It also includes various methods for detecting faces. The second part is a description of two programs designed to identify persons. The first program operates in real time under laboratory conditions, where using web camera acquires images of user's face. This program is designed to speed recognition of persons. The second program has been working on static images, in real terms. The main essence of this method is successful recognition of persons, therefore the emphasis on computational complexity. The programs I used a staged method of PCA, LDA and kernel PCA (KPCA). The first program only works with the PCA method, which has good results with respect to the success and speed of recognition. In the second program to compare methods, which passed the best method for KPCA.

Memory for names and faces is especially unpredictable. We have all experienced the embarrassment of failing to remember an individual’s name despite meeting them only minutes before. Many theories have been suggested to explain these frustrating moments (Burton & Bruce, 1993; O’Mahony & Newell, 2012). However, despite value of these theories, many neglect to explain how to improve name–face memory. Mnemonic devices are powerful memory aids that improve encoding and subsequent memory recall (McCabe et al., 2013). Given the effectiveness of mnemonics, name–face memory recall may be improved with a novel mnemonic device. Previous research by Patel (M.Sc.) at McMaster University investigated one such mnemonic device: the house bunny effect (HBE). The HBE combines elements of the bizarreness effect (Cox & Wollen, 1981) and the production effect (Quinlan & Taylor, 2013) and predicts that repeating an individual’s name in a bizarre voice at the time of encoding (i.e., when meeting a new individual) improves name–face recall. However, contrary to this prediction, bizarre name production did not improve name–face memory recall compared to a normal voice production control. More importantly, a non-statistically significant trend in the opposite direction was observed—bizarre name production at the time of encoding hindered name–face memory recall (Patel, 2020). Given this finding, we present two studies: an online conceptual replication of the HBE and a study that further elucidates the mechanisms behind the HBE. The results of these two studies will help determine how name–face memory is influenced by bizarre name production at the time of encoding (i.e., the HBE mnemonic). / Thesis / Master of Science (MSc)

No description available.