Ao engajar-se nas diversas formas de interação face a face, os interagentes devem considerar uma série de regras linguísticas, contextuais e interacionais para assegurar sua plena execução. Ainda que as regras conversacionais sejam culturalmente pré-definidas, as diversas situações interacionais criam, inevitavelmente, conflitos que podem oferecer perigo à imagem pública do locutor, assim como a do interlocutor. Para preservar a imagem de ambos, amenizar ou mesmo evitar as tensões nas interações verbais, são colocadas em prática estratégias de polidez verbal, que podem ser definidas como identidade social expressa em conduta verbal. O presente trabalho visa a estudar o funcionamento de alguns procedimentos conversacionais de atenuação como estratégia fundamental à realização harmoniosa de uma interação verbal. Desse modo, a compreensão do papel que desempenha a polidez verbal em determinada cultura pode ser determinante para o êxito do objetivo pretendido em uma troca conversacional, afinal, cada grupo social possui um perfil comunicativo que o caracteriza. Para tanto, foram analisadas entrevistas televisivas realizadas por falantes de língua francesa (França) e também portuguesa (Brasil) para observar quais estratégias de polidez negativa são empregadas em cada uma dessas culturas em situações de confronto. A partir da classificação proposta por Kerbrat-Orecchioni (1996, 2005) que tem em Brown e Levinson (1978, 1987) suas principais referências, procurou-se identificar as diferenças e as semelhanças dos procedimentos de atenuação colocados em ação em ambas as línguas. Nos casos observados, verificou-se certa tendência entre os falantes de língua portuguesa à contemporização de seus enunciados, o que pode denotar uma maior disposição em preservar a face de seu interlocutor, talvez para proteger a própria face. / By engaging in various forms of face to face interaction, the interactants must consider a number of linguistic rules, contextual and interactive, in order to ensure its full implementation. Although the conversational rules are culturally pre-defined, the various interactional situations create, inevitably, conflicts that may cause danger to the speaker and the interlocutor\'s public image. To preserve the image of both, to reduce or even avoid tensions in verbal interactions, verbal politeness strategies are put into practice, which can be defined as a social identity expressed in verbal behavior. The present work aims to study the functioning of some conversational mitigation procedures as a key strategy to achieve a harmonious verbal interaction. Thus, understanding the role played by verbal politeness in a particular culture can be crucial to the success of the intended purpose in a conversational exchange, after all, each social group has a communication profile that characterizes it. Thus, we analyzed television interviews conducted by speakers of French (France) and Portuguese (Brazil) in order to examine which negative politeness strategies are employed in each of these cultures in a confrontational situation. Based on the classification proposed by Kerbrat-Orecchioni (1996, 2005) which has in Brown and Levinson (1978, 1987) its main references, we sought to identify the differences and similarities of the mitigation procedures put into action in both languages. In the studied cases, we observed a tendency among the Portuguese-speaking people to compromise their statements, which may reflect a greater willingness to preserve their interlocutors face, perhaps to protect their own face.

Introdução: A patogenia da rinossinusite crônica com polipose nasossinusal não está completamente estabelecida e existem algumas explicações para essa doença como os superantigenos, o desequilíbrio inflamatório e, mais recentemente, o biofilme. Objetivos: Avaliar a associação entre a presença do biofilme e a presença de rinossinusite crônica com polipose nasossinusal. Avaliar o quadro clínico e radiológico pré-operatória e pós-operatória segundo a presença do biofilme. Métodos: Este é uma estudo realizado em um hospital terciário universitário. A primeira parte foi um estudo caso-controle com um grupo de 33 pacientes consecutivos com rinossinusite crônica com polipose nasossinusal submetidos a cirurgica endoscópica nasossinusal e um grupo controle de 27 pacientes submetidos a septoplastia para tratamento de obstrução nasal. As amostras da mucosa foram coletadas no intra-operatório para avaliação por microscopia eletrônica de varredura para determinar a presença do biofilme. A segunda parte foi um estudo prospectivo em que dados pré-operatórios e pós-operatórios foram registrados, incluindo avaliações padronizadas da qualidade de vida doença-específica relacionadas à obstrução nasal e à rinossinusite, da endoscopia nasal e da tomografia de cavidades paranasais. A análise estatísca foi realizada. Para todos os testes um p=0.05 foi considerado significativo. Resultados: Os biofilmes foram encontrados em 72.7% (24/33) dos pacientes com rinossinusite crônica com polipose nasossinusal e 48.1% (13/27) dos pacientes submetidos a septoplastia (Odd ratio=2.87, IC95% 0.9796-8.419, p=0.051). Este foi o primeiro estudo a analisar o efeito da presença do biofilme nos resultados pós-operatórios com medidas padronizadas de um grupo de pacientes apenas com rinossinusite crônica com polipose nasossinusal. O biofilme estava presente em 72.4% (21/29) dos pacientes que completaram o seguimento. Os pacientes com biofilmes apresentaram uma pior pontuação pré-operatória NOSE e Lund-Kennedy estatísticamente significativos, mas uma mediana semelhante na pontuação total do SNOT-20. Os pacientes com biofilme apresentaram uma melhor resultado na pontuação Lund-Kennedy (p=0.036). Estes pacientes apresentaram piores resultados no SNOT-20 e resultados similares quanto ao NOSE e o Lund-Mackay. Conclusão: Os biofilmes foram demonstrados presentes nos pacientes submetidos a cirurgia endoscópica funcional para rinossinusite crônica com polipose nasossinusal mas também nos controles. Embora a prevalência não tenha sido diferente significativamente, o intervalo de confiança extremamente amplo de 95%, que apenas cruza a unidade, sugere que uma diferença significativa pode ter sido perdida por causa do baixo poder estatístico e estudos futuros serão necessários. Os biofilmes estiveram relacionados com pior qualidade de vida doença-específica pré-operatória NOSE e avaliação endoscópica (Lund-Kennedy), e melhores resultados endoscópicos. Nossos resultados sugerem que nos pacientes com uma melhora clínica significativa após a cirurgia, o biofilme representou um papel mais predominante na fisiopatologia da doença. Neste subgrupo, a cirurgia provavelmente removeu a quantidade de biofilme necessária para restaurar o desequilíbrio inflamatório na mucosa / Introduction: The pathogenesis of chronic rhinosinusitis with nasal polyps is not completely established and there are some explanations for this disease, such as superantigens, inflammatory imbalance and, more recently, biofilms. Objective: Evaluate the association of biofilms presence and chronic rhinosinusitis with nasal polyps. Evaluate outcomes after sinus surgery for chronic rhinosinusitis with nasal polyps according to the presence of biofilms. Methods: This is a University based-tertiary care center study. The first part was a case-control study that evaluated a group of 33 consecutive patients undergoing functional endoscopic sinus surgery for chronic rhinosinusitis with nasal polyps and a control group of 27 patients undergoing septoplasty for nasal obstruction treatment. Mucosal samples were harvested intra-operatively for scanning electron microscopic examination to determine biofilms presence. The second part was a prospective study. Preoperative and follow up data were recorded, including standardized evaluations of disease-specific quality of life related to nasal obstruction and rhinosinusitis, of nasal endoscopy and sinus computer tomography scan. Statistical analysis was performed. For all statistical tests p=0.05 was considered significant. Results: Biofilms were found in 72.7% (24/33) of chronic rhinosinusitis with nasal polyps patients and in 48.1%(13/27) of septoplasty patients (Odds ratio = 2.87, CI95% from 0.9796 to 8.419, p=0.051). This was the first report to analyze the effect of biofilms in outcomes with standardized measures of a group of only chronic rhinosinusitis with nasal polyps patients. Biofilms were present in 72.4% (21/29) of these patients. Patients with biofilms had a statistically significant worst preoperative score related to nasal obstruction and nasal endoscopy, but a similar median sinusitis total score. Patients with biofilms presented better Lund-Kennedy outcome (-3[5]vs.-1[2],U=46.0,p=0.036), but the best endoscopic improvement might reflect the worst clinical preoperative status. These patients had worst outcomes in SNOT-20 (-0.75[1.15]vs.-1.30[1.32],U=69.0,p=0.21) and similar outcomes in NOSE(-55.0[50.0] vs. -60.0[50.0], U=81.0,p=0.67) and Lund-Mackay (-4[5]vs.-4[4]),U=75.5,p=0.49). Patients with biofilms presented better Lund-Kennedy outcome (p=0.036). There was a correlation among some QoL outcome scores in both groups. Conclusion: Biofilms were demonstrated to be present in patients undergoing functional endoscopic sinus surgery for chronic rhinosinusitis with nasal polyps but also in controls. Although the prevalence was not significantly different, the extremely wide 95% confidence interval, which just crosses unity, suggests that a meaningful clinical difference may have been missed because of low statistical power and that further study is necessary. Biofilms were related with worst preoperative disease-specific quality of life questionnaire (NOSE) and endoscopic evaluation (Lund-Kennedy), and better endoscopic outcome. Our findings suggest that in patients with a significant clinical improvement after surgery, the biofilm had a more predominant role in the pathophysiology of the disease. In this subgroup, the surgery probably removed the amount of biofilms needed to restore the mucosal inflammatory imbalance

INTRODUÇÃO: A presença de rugas na face devido à hipercinese muscular é comum nas regiões frontal, glabelar e peri-orbitárias. São descritos diversos métodos para o tratamento das rugas de expressão, como a dermoabrasão, a ablação a laser, o laser não ablativo, preenchimentos, cirurgia e aplicações de toxina botulínica. O tratamento das rugas da face com toxina botulínica tipo A é método consagrado, porém são pouco definidos os efeitos a longo prazo. Este estudo retrospectivo teve como objetivo avaliar as rugas das regiões frontal e glabelar da face em pacientes submetidas a aplicações seriadas da toxina botulínica tipo A com finalidade estética, analisando os intervalos entre as aplicações e as doses utilizadas. MÉTODOS: Foram analisadas 24 pacientes do sexo feminino, submetidas entre 5 a 7 aplicações da toxina botulínica tipo A, no período de julho de 1997 a junho de 2006. O tempo médio de acompanhamento foi de 42,2 (± 4,0) meses e o intervalo médio entre as aplicações de 8 (± 0,51) meses. A idade média observada de início da aplicação foi de 48,0 (± 3,0) anos, e da última aplicação foi de 51,6 (± 3,0) anos. Foram métodos de avaliação a análise da documentação fotográfica de antes da primeira e antes da última aplicação, sendo as rugas frontais e glabelares avaliadas segundo escala padronizada, e dados colhidos dos prontuários. RESULTADOS: A longo prazo, verificou-se: 1) amenização das rugas estáticas da região frontal em 62,5% das pacientes e em 37,5% tais rugas se mantiveram inalteradas; 2) amenização das rugas estáticas da região glabelar em 47,2% das pacientes, em 50% tais rugas se mantiveram inalteradas e em 2,8% verificou-se pouca acentuação; 3) amenização das rugas dinâmicas da região frontal em 84,7% das pacientes e em 15,3% tais rugas se mantiveram inalteradas; 4) amenização das rugas dinâmicas da região glabelar (corrugadores) em 63,9% das pacientes, em 26,4% tais rugas se mantiveram inalteradas e em 9,7% verificou-se pouca acentuação. 5) amenização das rugas dinâmicas da região glabelar (prócero) em 57% das pacientes, em 32% tais rugas se mantiveram inalteradas e em 11% verificou-se pouca acentuação. A média da dose total de toxina botulínica utilizada por sessão no presente estudo foi de 43,83 ± 1,25 U, e a dose total cumulativa foi de 272,08 ± 20,42 U. CONCLUSÕES: No longo prazo, existe maior porcentagem de pacientes com amenização ou aspecto inalterado das rugas estáticas e dinâmicas das regiões frontal e glabelar da face em relação a pacientes com acentuação das mesmas. Não houve variação estatisticamente significativa das médias dos intervalos entre as aplicações. A dose total de toxina botulínica aumentou de forma estatisticamente significativa até a terceira aplicação, mantendo-se sem variação significativa a partir de então. / INTRODUCTION: The presence of wrinkles on the face due to the over activity of muscles is rather common on the frontal, glabellar, and periocular regions. A number of methods for the treatment of face lines, such as skin abrasion, laser resurfacing, fillers, surgery and botulinum toxin A have been described. The treatment of facial rhytids with botulinum toxin A is widely used. However, its long term effects are not well defined. This retrospective study assesses the rhytids of both the frontal and glabellar regions of the face on patients submitted to multiple botulinum toxin A applications for aesthetic use, analyzing intervals between applications and dosages. METHODS: 24 female patients who had undergone 5 to 7 botulinum toxin A applications from July, 1997 to June, 2006 were studied. The mean time of follow up was 42.2 (± 4.0) months and the mean interval between applications was 8 (± 0.51) months. The mean age of the patients at the beginning of application was 48.0 (± 3.0) years old, and 51.6 (± 3.0) years old at the last application. The evaluation was carried through the analysis of photographic documentation from before the first and last applications, and both frontal and glabellar rhytids were evaluated according to standardized scale, as well as data collected from patients charts. RESULTS: the long term analysis demonstrated that: 1) improvement of the static rhytids of the frontal region in 62,5% of patients and such rhytids remained unaltered in 37.5% of the patients; 2) improvement of the static rhytids of the glabellar region in 47.2% of the patients, they remained unaltered in 50% of the patients and there was a slight worsening in 2.8% of the patients; 3) improvement of the dynamic rhytids of the frontal region in 84.7% of patients, and they remained unaltered in 15.3% of the patients; 4) improvement of the dynamic rhytids of the glabellar region (corrugator) in 63.9% of the patients, they remained unaltered in 26.4% of the patients and there was a slight worsening in 9.7% of the patients; 5) improvement of the dynamic rhytids of the glabellar region (procerus) in 57% of the patients, they remained unaltered in 32% and there was a slight worsening in 11% of the patients. The mean total dosage of botulinum toxin A used per session in this study was 43.83 ± 1.25 U, and the total cumulative dosage was 272.08 ± 20.42 U. CONCLUSIONS: In the long run, a higher percentage of patients showed improvement or unaltered aspect of their static and dynamic rhytids of the frontal and glabellar regions of the face, when compared to the patients that showed worsening. There was no variation of the mean intervals between the applications. The total dosage of botulinum toxin was significantly increased up to the third application, and kept stable in the following sessions.

A presente pesquisa pretende examinar as possibilidades estéticas e subjetivas inerentes a máscaras pós-humanas. A fim de analisar a abordagem artística da face, selecionamos algumas obras de Lygia Clark, Hyungkoo Lee, France Cadet e Sterling Crispin para estudos de caso. Estes, destacados nos capítulos um, dois, três e quatro, nos permitem analisar de forma detalhada, trabalhos que esclarecem indutivamente a dinâmica da situação investigada. Em diálogo com os estudos de caso, é conduzida pesquisa de laboratório em que a face é também elaborada como máscara artística no âmbito da produção da pesquisadora, criada a partir da confluência entre meios artesanais, de produção de massa e meios digitais, ao gerar modelos tridimensionais e sua consequente representação física por meio da fabricação digital. Agrupamos as obras de acordo com vínculos aos procedimentos artísticos de recriação, dissimulação e simulação. Determinados assuntos surgidos das análises das obras ganharam embasamento teórico por meio de tópicos conceituais que discutem aspectos estéticos e subjetivos. Para a realização do estudo, desenvolvemos pesquisa bibliográfica, estudo de caso das obras dos artistas selecionados, pesquisa em laboratório e participações em congressos e mostras ligadas à Arte Tecnológica. Os resultados subjetivos e perceptivos da manipulação da face na arte tecnológica refletem o questionamento acerca da construção de singularidades e as transformações na concepção de ser humano. Assim, intenciona-se contribuir com o meio acadêmico, a sociedade e as artes na discussão sobre as subjetividades emergentes em contexto tecnológico. / This research intends to examine the aesthetic and subjective possibilities inherent to posthuman masks. In order to analyze the artistic approach of the face, we selected some works by Lygia Clark, Hyungkoo Lee, France Cadet and Sterling Crispin for case studies. These, highlighted in chapters one, two, three and four, allow us to analyze in detail works that clarify inductively the dynamics of the situation investigated. In dialogue with the case studies a laboratory research is conducted where the face is also fabricated as an artistic mask within the scope of the researcher\'s production, created from the confluence of artisanal, mass production and digital media, generating three-dimensional models and its consequent physical representation through digital fabrication. We grouped the works in accordance with the artistic procedures of recreation, dissimulation and simulation. Certain issues arising from the analysis of the works have gained theoretical basis through conceptual topics that discuss aesthetic and subjective aspects. For the study, we developed bibliographic research, case study of the works of selected artists, laboratory research and participation in congresses and exhibitions related to Technological Art. The subjective and perceptive results of the manipulation of the face in the technological art reflect the questioning about the construction of singularities and the changes in the concept of human being. Thus, it intends to contribute to academia, society and the arts in the discussion about emerging subjectivities in technological context.

Submitted by isabela.moljf@hotmail.com (isabela.moljf@hotmail.com) on 2017-05-12T12:43:09Z No. of bitstreams: 1 andreluizdacunha.pdf: 5996425 bytes, checksum: b2672b9464385b63d7ce5aa90c90c7eb (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-05-12T15:45:22Z (GMT) No. of bitstreams: 1 andreluizdacunha.pdf: 5996425 bytes, checksum: b2672b9464385b63d7ce5aa90c90c7eb (MD5) / Made available in DSpace on 2017-05-12T15:45:22Z (GMT). No. of bitstreams: 1 andreluizdacunha.pdf: 5996425 bytes, checksum: b2672b9464385b63d7ce5aa90c90c7eb (MD5) Previous issue date: 2012-07-31 / Condroitim sulfato é um glicosaminoglicano sulfatado composto por unidades dissacarídicas formadas por ácido D-glucurônico e N-acetil-galactosamina. Este polissacarídeo é utilizado no Brasil em combinação com outros fármacos para tratamento de osteoartrite. Este trabalho teve como objetivo avaliar a qualidade do insumo farmacêutico condroitim sulfato de sódio utilizado em farmácias de manipulação. Para isso foi necessário estabelecer uma técnica de eletroforese em gel de poliacrilamida para análise de açúcares (FACE), bem como produzir enzimas específicas para a digestão de condroitim sulfato. Diferentes dissacarídeos insaturados, monossacarídeos sulfatados e açúcares neutros derivatizados com 2-aminoacridona foram separados por FACE, usando dois sistemas tampão distintos. Fracionamos por cromatografia de interação hidrofóbica três condroitinases de F. heparinum – condroitinase AC, C e B. Por FACE caracterizamos a atividade dessas enzimas e identificamos contaminação de condroitinase AC por sulfatase específica para hexosamina sulfatada na posição 4, que foi inibida por fluoreto de sódio (10 mM). Glucuronidase com atividade específica para dissacarídeo não sulfatado e 6-sulfatado foi detectada em condroitinase C, e sacarolactona (10 mM) foi capaz de impedir somente a degradação de ΔDi0S. Dosagem de condroitim sulfato em amostras farmacêuticas foi realizada por eletroforese em gel de agarose e por titulação fotométrica. Teor superior a 80% foi encontrado em apenas cinco matériasprimas. O peso molecular médio do condroitim sulfato nessas amostras variou entre 16 e 26 kDa, e análise dissacarídica por FACE revelou proporções próximas entre dissacarídeo 4-sulfatado e 6-sulfatado. Onze amostras apresentaram teor inferior a 20%, e análise por FACE demonstrou presença de contaminação por lactose ou polímeros de glicose com diferentes pesos moleculares. Concluímos neste estudo que há grande distorção entre os resultados reportados no certificado de análise de onze insumos analisados e os resultados obtidos nesse trabalho. Torna-se necessário, portanto, maior fiscalização e regulação do comércio deste produto. / Chondroitin sulfate is a sulfated glycosaminoglycan composed of alternate sequences of D-glucuronic acid and N-acetyl-D-galactosamine. This polysaccharide is widely recommended for treatment of osteoarthritis in Brazil, in association with other drugs. The objective of the present study was to evaluate the quality of chondroitim sulfate raw material used for pharmaceutical recipes. A polyacrylamide gel electrophoresis method for carbohydrate analysis (FACE) was established, so as the production of specific enzymes able to digest chondroitin sulfate. Different unsaturated disaccharides, sulfated monosaccharides and neutral sugars derivatized with 2-aminoacridona were resolved by FACE, using two distinct buffer systems. F. heparinum chondroitinase AC, C and B were fractioned by hydrophobic interaction chromatography, and the activity of these enzymes was characterized by FACE. Chondroitinase AC demonstrated contamination by a sulfatase specific for sulfation at position 4 of hexosamine, which was inhibited by 10 mM sodium fluoride. Glucuronidase contamination with specific activity against non sulfated and 6-sulfated disaccharide was detected in chondroitinase C, and 10 mM D-saccharic acid-1,4-lactone inhibited the degradation of only non sulfated disaccharide. Chondroitin sulfate content in pharmaceutical raw materials was determined by agarose gel electrophoresis and by photometric titration. Only five samples showed content greater than 80%. Chondroitin sulfate average molecular weight in these samples varied from 16 to 26 kDa, and disaccharide analysis by FACE revealed similar proportions between 4-sulfated and 6-sulfated disaccharide. Eleven samples showed less than 20% of chondroitin sulfate, and contaminant analysis by FACE detected the presence of lactose or different polymers of glucose. We concluded that there is a large distortion between the data reported at the certificate of analysis of eleven products and the results obtained in this work. Stricter regulation of this raw material should be enforced.

L’objectif de ce mémoire est d’étudier le rôle de la politesse dans l’interaction verbale. Ce document répondra à la question de savoir si un dialogue peut rester pacifique et sans friction en absence de politesse. Une description brève de la théorie de la politesse est suivie par une analyse. L’analyse montrera toutefois qu’on ne peut pas parler d’absence complète de politesse durant toute l’entièreté d’un échange mais uniquement lors de moments très brefs de celui-ci. Ces fragments d’échange non-polis mais pacifiques se manifesteront lors de dialogues où il existe déjà une relation de confiance entre les locuteurs. / The objective of this paper is to study the role of politeness in verbal interaction. The document will answer the question whether a dialogue can remain peaceful and frictionless also when politeness is absent. A brief description of the Politeness Theory is followed by an analysis. The analysis will however show that we cannot speak of complete lack of politeness but only during a very short time, without risking the threat of conflict. These non-polite but peaceful moments will occur in dialogues where there is already a relationship of trust between users.

In a criminal investigation, witnesses may get asked by the police to provide a perpetrator’s description or to generate a composite image of the perpetrator’s face. Due to their elevated vulnerability to victimisation people with a learning disability (LD) may be more likely than other members of the wider community to find themselves in such situations. Research regarding face recognition and description abilities of this group has been to some extent neglected in the eyewitness research literature. Consequently, guidance for practitioners on how to effectively generate facial composite images with LD witnesses is limited. The current research addresses this issue, by investigating basic and applied face recognition and description abilities in individuals with mild learning disabilities (mLD) during a series of experimental studies. Moreover, potential facilitating measures are introduced and assessed. Five studies were conducted during the course of this thesis. In the first study a survey was designed to collect information on currently used composite systems by UK law enforcement agencies and how operators perceive and treat witnesses with LD. The survey findings confirmed the initial assumption that individuals with LD may indeed find themselves in the situation of having to describe a perpetrator’s face to an investigative officer. Furthermore, the results emphasised the lack of guidance available to operators on how to best meet the special needs of this particular witness population. Study 2 investigated basic face recognition and description abilities in people with mLD and revealed that overall they performed at a lower level than the non-LD controls. Despite this finding, mLD individuals as a group performed above chance levels and they displayed variability in performance depending on the introduced measures. iv Studies 3 and 5 investigated these abilities in a more applied setting, namely during the construction of facial composites with contemporary facial composite systems. Study 3 revealed that composites generated with the E-FIT system, a featural system, were considerably poorer than those created by their non-LD counterparts. Studies 4 and 5 attempted to improve mLD individuals’ performance by applying visual prompts and by using a more holistic facial composite system, i.e. EvoFIT. There was little evidence of the former being advantageous for witnesses with mLD, however, EvoFIT significantly enhanced composite construction abilities in the mLD participants. Finally, the practical and theoretical implications of the main findings are discussed.

Abstract In the last decades, face recognition systems have evolved a lot in terms of performance. As a result, this technology is now considered as mature and is applied in many real world applications from border control to financial transactions and computer security. Yet, many studies show that these systems suffer from vulnerabilities to spoofing attacks, a weakness that may limit their usage in many cases. A face spoofing attack or presentation attack occurs when someone tries to masquerade as someone else by presenting a fake face in front of the face recognition camera. To protect the recognition systems against attacks of this kind, many face anti-spoofing methods have been proposed. These methods have shown good performances on the existing face anti-spoofing databases. However, their performances degrade drastically under real world variations (e.g., illumination and camera device variations). In this thesis, we concentrate on improving the generalization capabilities of the face anti-spoofing methods with a particular focus on the texture based techniques. In contrast to most existing texture based methods aiming at extracting texture features from gray-scale images, we propose a joint color-texture analysis. First, the face images are converted into different color spaces. Then, the feature histograms computed over each image band are concatenated and used for discriminating between real and fake face images. Our experiments conducted on three color spaces: RGB, HSV and YCbCr show that extracting the texture information from separated luminance chrominance color spaces (HSV and YCbCr) yields to better performances compared to gray-scale and RGB image representations. Moreover, to deal with the problem of illumination and image-resolution variations, we propose to extract this texture information from different scale images. In addition to representing the face images in different scales, the multi-scale filtering methods also act as pre-processing against factors such as noise and illumination. Although our obtained results are better than the state of the art, they are still far from the requirements of real world applications. Thus, to help in the development of robust face anti-spoofing methods, we collected a new challenging face anti-spoofing database using six camera devices in three different illumination and environmental conditions. Furthermore, we have organized a competition on the collected database where fourteen face anti-spoofing methods have been assessed and compared. / Tiivistelmä Kasvontunnistusjärjestelmien suorituskyky on parantunut huomattavasti viime vuosina. Tästä syystä tätä teknologiaa pidetään nykyisin riittävän kypsänä ja käytetään jo useissa käytännön sovelluksissa kuten rajatarkastuksissa, rahansiirroissa ja tietoturvasovelluksissa. Monissa tutkimuksissa on kuitenkin havaittu, että nämä järjestelmät ovat myös haavoittuvia huijausyrityksille, joissa joku yrittää esiintyä jonakin toisena henkilönä esittämällä kameralle jäljennöksen kohdehenkilön kasvoista. Tämä haavoittuvuus rajoittaa kasvontunnistuksen laajempaa käyttöä monissa sovelluksissa. Tunnistusjärjestelmien turvaamiseksi on kehitetty lukuisia menetelmiä tällaisten hyökkäysten torjumiseksi. Nämä menetelmät ovat toimineet hyvin tätä tarkoitusta varten kehitetyillä kasvotietokannoilla, mutta niiden suorituskyky huononee dramaattisesti todellisissa käytännön olosuhteissa, esim. valaistuksen ja käytetyn kuvantamistekniikan variaatioista johtuen. Tässä työssä yritämme parantaa kasvontunnistuksen huijauksen estomenetelmien yleistämiskykyä keskittyen erityisesti tekstuuripohjaisiin menetelmiin. Toisin kuin useimmat olemassa olevat tekstuuripohjaiset menetelmät, joissa tekstuuripiirteitä irrotetaan harmaasävykuvista, ehdotamme väritekstuurianalyysiin pohjautuvaa ratkaisua. Ensin kasvokuvat muutetaan erilaisiin väriavaruuksiin. Sen jälkeen kuvan jokaiselta kanavalta erikseen lasketut piirrehistogrammit yhdistetään ja käytetään erottamaan aidot ja väärät kasvokuvat toisistaan. Kolmeen eri väriavaruuteen, RGB, HSV ja YCbCr, perustuvat testimme osoittavat, että tekstuuri-informaation irrottaminen HSV- ja YCbCr-väriavaruuksien erillisistä luminanssi- ja krominanssikuvista parantaa suorituskykyä kuvien harmaasävy- ja RGB-esitystapoihin verrattuna. Valaistuksen ja kuvaresoluution variaation takia ehdotamme myös tämän tekstuuri-informaation irrottamista eri tavoin skaalatuista kuvista. Sen lisäksi, että itse kasvot esitetään eri skaaloissa, useaan skaalaan perustuvat suodatusmenetelmät toimivat myös esikäsittelynä sellaisia suorituskykyä heikentäviä tekijöitä vastaan kuten kohina ja valaistus. Vaikka tässä tutkimuksessa saavutetut tulokset ovat parempia kuin uusinta tekniikkaa edustavat tulokset, ne ovat kuitenkin vielä riittämättömiä reaalimaailman sovelluksissa tarvittavaan suorituskykyyn. Sen takia edistääksemme uusien robustien kasvontunnistuksen huijaamisen ilmaisumenetelmien kehittämistä kokosimme uuden, haasteellisen huijauksenestotietokannan käyttäen kuutta kameraa kolmessa erilaisessa valaistus- ja ympäristöolosuhteessa. Järjestimme keräämällämme tietokannalla myös kansainvälisen kilpailun, jossa arvioitiin ja verrattiin neljäätoista kasvontunnistuksen huijaamisen ilmaisumenetelmää.

The dialogical plait in individual vocal education Thesis in Music Education by Jannike Huss. Part of the work for the master´s degree. Studies from School of Music, Theatre, and Art, University of Örebro, 2010. Available from Örebro University, SE-701 82 Örebro, Sweden. Original in Swedish. This thesis treats the value of communication for individual vocal education on a higher level. The purpose is to examine and illuminate what is happening in the interaction between teacher and student in individual vocal education, and how it in turn can affect learning. To get deeper knowledge and understanding of the subject, observations of singing lessons and openhearted interviews have been conducted with one teacher and two of her students. During the discussions the participants gave their own views on how an effective communication can occur in the interaction between teacher and student. In this study, only individual lessons in singing on tertiary music education have been studied. The students participating in the study are both prospective teachers with a major in vocals, and it turned out that they already were obvious carriers of two different roles, namely their student role and also their future occupational role. Due to this fact they could experience the interaction from both sides. The interviews with both students were directly connected to their lessons, and after the lessons the teacher was interviewed. All the interviews took shape as open conversations, and have since been transformed into a coherent narrative with a narrative approach in order to create meaning and context (Kvale, 2008; Georgii-Hemming, 2005). Data from the empirical material has been processed, and recounted to a theoretical conceptual framework (von Wright, 2003; Buber, 2004). Keywords: Vocal education, dialogue, interaction face-to-face, intersubjectivity, relationship, teacher training.

Every day we encounter a variety of people, and we need to recognize their identity to interact with them appropriately. The most common ways to recognize a person's identity include the recognition of a face and of a voice. Recognizing a face or a voice is effortless, but the neural mechanisms that enable us to do so are complex. The face of a same person can look very different depending on the viewpoint and it can be partly occluded. Analogously, a voice can sound very different when it is saying different words. The neural mechanisms that enable us to recognize a person's identity need to abstract away from stimulus differences that are not relevant for identity recognition. Patient studies indicate that this process is executed with the contribution of multiple brain regions (Meadows, 1974; Tranel et al., 1997). However, the localization accuracy allowed by neuropsychological studies is limited by the lack of control on the location and extent of lesions. Neuroimaging studies individuated a set of regions that show stronger responses to faces than other objects (Kanwisher et al., 1997; Rajimehr et al., 2009), and to voices than other sounds (Belin et al., 2000). These regions do not necessarily encode information about a person's identity. In this thesis, a set of regions that encode information distinguishing between different face tokens were individuated, including ventral stream regions located in occipitotemporal cortex and the anterior temporal lobes, but also parietal regions: posterior cingulate and superior IPS. Representations of face identity with invariance across different viewpoints and across different halves of a face were found in the right ATL. However, representations of face identity and of voice identity were not found to overlap in ATL, indicating that in ATL representations of identity are organized by modality. For famous people, multimodal representations of identity were found in association cortex in posterior STS. / Psychology