The diploma thesis deals with detailed look at the project Education 21 and so the teaching using new technologies, especially interactive whiteboards and netbooks, in Czech schools. The objective was observation of teaching mathematics, methods of using interactive whiteboards and netbooks in mathematics lessons at secondary schools participating project Education 21. Evaluation and conclusions are based on analyzes of lessons recorded in the academic year 2009/2010 and 2010/2011, which were investigated and further divided into shorter stories in case that interactive whiteboard or netbook was used in some way. I watched purpose and the way of use of interactive whiteboard or netbook in the episodes, then the material which this technology was used with the aid of and who worked with interactive whiteboard. Some episodes can serve as an example of "good" or interesting way of working with the IWB and NTB in mathematics lessons, or they can be an inspiration for other mathematics teachers but also teachers of other subjects. Keywords: interactive whiteboard (IWB), netbook (NTB), interactive textbook - e- books, applet, mathematics, Education 21, smart notebook, videos.

Tema: Recurso Audiovisual Informativo. Objetivos: Desenvolver e exibir DVD informativo sobre surdez e língua de sinais, verificando o impacto desse material sobre familiares ouvintes de crianças surdas. Método: Este estudo compreendeu 2 etapas: 1) criação, produção e edição do DVD; 2) exibição deste para 28 famílias ouvintes de crianças surdas da cidade de SP. O procedimento consistiu na aplicação de protocolos pré e pós-intervenção, intermediado pela Intervenção onde o DVD foi apresentado. Na fase de pré-intervenção os sujeitos preencheram a Ficha de Identificação e assinaram o Termo de Consentimento Livre e Esclarecido. Na fase de pós-intervenção responderam a um questionário com 15 questões, sendo 12 específicas sobre o material produzido. Resultados: Para a 1ª etapa do estudo foram necessários 28 meses entre o processo de criação e edição, com base em cinco fases para a produção de um vídeo, resultando em um DVD de 15 minutos sobre os temas surdez e língua de sinais com a participação de uma personagem em espuma (puppet articulado) que atua com a pesquisadora na apresentação dos temas citados. Na 2ª etapa foram levantadas as opiniões dos familiares sobre o DVD: 90% o consideraram ótimo, 100% o consideraram um meio adequado para esclarecer dúvidas, 90% afirmaram que tê-lo assistido quando receberam o diagnóstico da perda auditiva teria contribuído para minimizar a angústia. O vídeo foi considerado de muito fácil e fácil compreensão por 100%, seu conteúdo considerado suficiente por 90% dos sujeitos. As respostas foram analisadas pelo Teste do Sinal. As opções das 12 questões do questionário foram classificadas em aspectos positivos e aspectos negativos, onde p 0,05 indicavam diferença significante. Das 12 questões, 11 receberam avaliações significativamente mais positivas e 01 sem significância. Conclusão: Os resultados demonstraram grande aceitabilidade ao vídeo por parte dos sujeitos, indicando que o mesmo cumpre seu papel como material educativo informativo evidenciando a relevância destes na área da saúde, tendo produzido um impacto positivo sobre a opinião dos sujeitos da pesquisa / Background: Informative Audiovisual. Aim: To develop a DVD about Deafness and Sign Language (SL) and to ascertain the impact of this material exhibition upon deaf childrens hearing families. Method: This study comprised two stages: 1) creation, production and edition of the DVD; 2) presentation of the DVD to 28 deaf childrens hearing families. The procedure consisted in the application of pre and post-intervention protocols, intermediated by the intervention which was the DVD exhibition. In the pre-intervention phase, subjects filled up the Identification Form and signed the Informed Consent Term. In the post-intervention phase, they answered a questionnaire with 15 questions (12 about the DVD). Results: The first stage lasted 28 months from the creation and edition process until the finalization of a 15 minutes video based in the five phases DVD production. The DVD content comprised the themes on deafness and sign language, presented by the researcher and an articulated puppet (a foam character). In the second stage the opinions about the DVD were analyzed and the results were that, 75% of the participants considered the video great, 25% good; 100% considered it a good way to clarify doubts; 92,86% affirmed that if they had watched it by the time they received the diagnostic of deafness of their children it would have contributed to diminish their anguish; the video was considered very easy and easy to understand by 96,43; The topics of the video were considered sufficient by 92,86%. Data was submitted to statistical analysis by using Sign Test with significance level of 5%. The possible responses for the 12 questions of the questionnaire were classified as positive or negative aspects. Eleven of the 12 questions received significantly more positive than negative evaluation. Conclusion: The video produced a positive impact upon subjects opinion, indicating that it fulfilled its role of informative educative material, evidencing its relevance in the health area

The influence of new media on theatrical practice over the past fifty years has spurred a movement towards theatrical forms which are increasingly organized around the sensory elements of performance. This change is most noticeable in the visual approaches to theatre, and it has produced what I have labeled a theatre of visuality. This thesis argues that the tendencies for visualization found in visual media have extensively marked the performance strategies of contemporary theatre practice, resulting in a shift away from the logocentric dramatic text and towards theatre performance organized around the visual. Looking at four contemporary productions of Georg Buchner’s Woyzeck –Thomas Ostermeier’s Woyzeck (2005), Vesturport’s Woyzeck (2005), Robert Wilson’s Woyzeck (2000), and Josef Nadj’s Woyzeck ou l’Ébauche du Vertige (1994)– this thesis produces a preliminary typology of four distinct visualities/theatrical forms which make up the theatre of visuality: hyperrealism, synesthesia, superficiality, and visual narration. This thesis contributes to the conceptualization and understanding of postdramatic theatre by linking the theatre’s rejection of the text to the increased centrality of the visual in performance, and by tracing these shifts to the influence of visual media.

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The aim of this thesis is to provide optimization algorithms for accessing video services either in unmanaged or managed ways. We study recent statistics about unmanaged video services like YouTube and propose suitable optimization techniques that could enhance files accessing and reduce their access costs. Moreover, this cost analysis plays an important role in decision making about video files caching and hosting periods on the servers. Under managed video services called IPTV, we conducted experiments for an open-IPTV collaborative architecture between different operators. This model is analyzed in terms of CAPEX and OPEX costs inside the domestic sphere. Moreover, we introduced a dynamic way for optimizing the Minimum Spanning Tree (MST) for multicast IPTV service. In nomadic access, the static trees could be unable to provide the service in an efficient manner as the utilization of bandwidth increases towards the streaming points (roots of topologies). Finally, we study reliable security measures in video streaming based on hash chain methodology and propose a new algorithm. Then, we conduct comparisons between different ways used in achieving reliability of hash chains based on generic classifications

The influence of new media on theatrical practice over the past fifty years has spurred a movement towards theatrical forms which are increasingly organized around the sensory elements of performance. This change is most noticeable in the visual approaches to theatre, and it has produced what I have labeled a theatre of visuality. This thesis argues that the tendencies for visualization found in visual media have extensively marked the performance strategies of contemporary theatre practice, resulting in a shift away from the logocentric dramatic text and towards theatre performance organized around the visual. Looking at four contemporary productions of Georg Buchner’s Woyzeck –Thomas Ostermeier’s Woyzeck (2005), Vesturport’s Woyzeck (2005), Robert Wilson’s Woyzeck (2000), and Josef Nadj’s Woyzeck ou l’Ébauche du Vertige (1994)– this thesis produces a preliminary typology of four distinct visualities/theatrical forms which make up the theatre of visuality: hyperrealism, synesthesia, superficiality, and visual narration. This thesis contributes to the conceptualization and understanding of postdramatic theatre by linking the theatre’s rejection of the text to the increased centrality of the visual in performance, and by tracing these shifts to the influence of visual media.

Gegenstand des Promotionsvorhabens ist die Anwendung der Mustertheorie als systemtheoretische Methode zur Beschreibung verbreiteter Lösungen für wiederkehrende Probleme bei der Gestaltung und Entwicklung videobasierter Lernumgebungen. Diese sogenannten Design Patterns beschreiben dabei abstrakte, generische Lösungen bezüglich des Wissensmanagements, der sozialen Interaktion und der Anreicherung von Inhalten in hypervideo-basierten Lernumgebungen. Um neben rezeptiven und selbstgesteuerten auch kollaborative Lernszenarien in solchen Lernumgebungen zu ermöglichen, werden Materialien, Aufgaben sowie Gruppenzusammensetzungen mit Hilfe von CSCL-Scripts strukturiert. Auf Grundlage der entwickelten Design Patterns und Scripts wurden ein Software-Framework sowie mehrere Lernumgebungen implementiert und in Feldstudien evaluiert.

Thesis (MScEng)--Stellenbosch University, 2013. / ENGLISH ABSTRACT: The way in which people consume video is changing with the adoption of new technologies such as tablet computers and smart televisions. These new technologies, along with the Internet, are moving video distribution away from satellite and terrestrial broadcast to distribution over the Internet. Services online now offer the same content that originally was only available on satellite broadcast television. However, these services are only viable in countries with high speed, inexpensive Internet bandwidth. The need therefore exists for alternative services to deliver content in countries where bandwidth is still expensive and slow. These include many of the developing nations of Africa. In this thesis we design and develop a video distribution platform that relies on peer-to-peer networking to deliver high quality video content. We use an existing video streaming peer-to-peer protocol as the primary distribution mechanism, but allow users to share video over other protocols and services. These can include BitTorrent, DC++ and users sharing hard drives with one another. In order to protect the video content, we design and implement a security scheme that prevents users from pirating video content, while allowing easy distribution of video data. The core of the security scheme requires a low bandwidth Internet connection to a server that streams keys to unlock the video content. The project also includes the development of a custom video player application to integrate with the security scheme. The platform is not limited to, but is aimed at high speed local area networks where bandwidth is free. In order for the platform to support feasible business models, we provision additional services, such as video cataloging and search, video usage monitoring and platform administration. The thesis includes a literature study on techniques and solutions to secure video entertainment, specifically in a peer-to-peer environment. / AFRIKAANSE OPSOMMING: Die wyse waarvolgens mense video verbruik is aan die verander met die ingebruikneming van nuwe tegnologie soos tabletrekenaars en slim televisiestelle. Hierdie nuwe tegnologie tesame met die Internet maak dat die verspreiding van video al hoe minder plaasvind deur middel van satellietuitsendings en al hoe meer versprei word deur die Internet. Aanlyn-Internetdienste bied deesdae dieselfde inhoud aan as wat voorheen slegs deur beeldsending versprei is. Hierdie dienste is egter slegs lewensvatbaar in lande met hoëspoed- en goedkoop Internetbandwydte. Daar is dus ’n behoefte aan alternatiewe tot hierdie dienste in lande waar bandwydte steeds duur en stadig is. Baie lande in Afrika kan in hierdie kategorie ingesluit word. In hierdie tesis word ’n videoverspreidingsplatform ontwerp en ontwikkel, wat van portuurnetwerke gebruik maak om hoëkwaliteit-beeldmateriaal te versprei. Die stelsel gebruik ’n bestaande portuurnetwerk-datavloeiprotokol as die premêre verspreidingsmeganisme, maar laat gebruikers ook toe om videoinhoud direk met ander gebruikers en dienste te deel. BitTorrent, DC++ en gebruikers wat hardeskywe met mekaar deel word hierby ingesluit. Ten einde die videoinhoud te beskerm ontwerp en implimenteer ons ’n sekuriteitstelsel wat verhoed dat gebruikers die videoinhoud onregmatig kan toe-eien, maar wat terselfdertyd die verspreiding van die data vergemaklik. Hierdie sluit die ontwikkeling van ’n pasgemaakte videospeler in. Die kern van die sekuriteitstelsel benodig ’n lae-bandwydte-Internetverbinding na ’n bediener wat sleutels uitsaai om die videoinhoud te ontsluit. Alhoewel nie daartoe beperk nie, is die platform gemik op hoëspoed-plaaslikegebiedsnetwerke met gratis bandwydte. Om die platvorm aan ’n haalbare sakemodel te laat voldoen het ons vir addisionele dienste soos videokatalogisering met soekfunksies, videoverbruikersmonitering en platvormadministrasie voorsiening gemaak. Die tesis sluit ’n literatuurstudie oor tegnieke en oplossings vir die beskerming van video data, spesifiek in die portuurnetwerke omgeving, in.

Made available in DSpace on 2014-12-17T15:47:56Z (GMT). No. of bitstreams: 1 AlbaSBL_DISSERT.pdf: 4454568 bytes, checksum: 25c4881845467354b0805f55975884ef (MD5) Previous issue date: 2011-03-30 / Nowadays several electronics devices support digital videos. Some examples of these devices are cellphones, digital cameras, video cameras and digital televisions. However, raw videos present a huge amount of data, millions of bits, for their representation as the way they were captured. To store them in its primary form it would be necessary a huge amount of disk space and a huge bandwidth to allow the transmission of these data. The video compression becomes essential to make possible information storage and transmission. Motion Estimation is a technique used in the video coder that explores the temporal redundancy present in video sequences to reduce the amount of data necessary to represent the information. This work presents a hardware architecture of a motion estimation module for high resolution videos according to H.264/AVC standard. The H.264/AVC is the most advanced video coder standard, with several new features which allow it to achieve high compression rates. The architecture presented in this work was developed to provide a high data reuse. The data reuse schema adopted reduces the bandwidth required to execute motion estimation. The motion estimation is the task responsible for the largest share of the gains obtained with the H.264/AVC standard so this module is essential for final video coder performance. This work is included in Rede H.264 project which aims to develop Brazilian technology for Brazilian System of Digital Television / Diversos aparelhos eletr?nicos atuais d?o suporte ? utiliza??o de v?deos digitais: celulares, c?meras fotogr?ficas, filmadoras e TVs digitais s?o alguns exemplos. Entretanto, esses v?deos, tal como foram capturados, apresentam uma grande quantidade de informa??o, utilizando milh?es de bits para sua representa??o. Para realizar o armazenamento dos dados na sua forma prim?ria, seria necess?ria uma quantidade enorme de espa?o e uma grande largura de banda para realizar a transmiss?o. A compress?o de v?deos torna-se, ent?o, essencial para possibilitar o armazenamento e a transmiss?o destes dados. O estimador de movimento, um dos m?dulos do codificador, explora a redund?ncia temporal existente nas sequ?ncias de v?deo para reduzir a quantidade de dados necess?ria ? representa??o da informa??o. Este trabalho apresenta uma arquitetura em hardware para o estimador de movimento para v?deos de alta resolu??o, segundo o padr?o H.264/AVC. O padr?o H.264/AVC ? o mais novo padr?o de compress?o de v?deos que possibilita, gra?as a uma s?rie de inova??es, alcan?ar elevadas taxas de compress?o. A arquitetura apresentada neste trabalho foi projetada para permitir o m?ximo reuso de dados, visando a diminui??o da largura de banda necess?ria para realizar o processo de estima??o de movimento. ? na estima??o de movimento que residem os maiores ganhos do padr?o e, por isso, este m?dulo ? essencial para a efici?ncia do codificador como um todo. Este trabalho est? inserido no projeto Rede H.264, que visa desenvolver tecnologia brasileira para o Sistema Brasileiro de Televis?o Digital

Este trabalho propõe introduzir conteúdos de Física, de modo a torná-los atrativos para alunos de 8ª série, através do estudo de situações divertidas, como os movimentos presentes em atividades esportivas e de lazer do seu cotidiano. Os movimentos foram filmados pelos alunos utilizando uma câmera fotográfica digital e, após, foi usado um programa de análise de imagens (Tracker). A escolha dos temas a serem filmados e analisados partiu de sugestões dos próprios alunos em sala de aula, orientados pela professora de Ciências e pelo autor dessa proposta de trabalho. As filmagens foram realizadas pelos alunos no pátio e no salão esportivo da escola; a análise dos movimentos filmados e sua descrição foram realizadas no laboratório de informática. A proposta foi aplicada no Colégio São José, de Caxias do Sul, RS, com cinco turmas de oitava série na disciplina de Ciências, durante os meses de setembro a novembro de 2008, inserindo as atividades paralelamente à apresentação dos conteúdos. Todo material desenvolvido e utilizado nesta proposta foi disponibilizado, gradualmente, no decorrer de sua aplicação na página Web do Colégio. O planejamento e a execução desta proposta foram embasados na teoria interacionista de Lev Vygotsky. Essa escolha se deu, principalmente, pelos objetivos pretendidos neste trabalho que previam que os alunos trabalhassem em grupo com a mediação dos professores, proporcionando e estimulando o gosto por aprender. A avaliação da proposta foi feita pelos alunos no final de sua aplicação através de um questionário de opinião. Segundo as respostas dos alunos, na medida em que atividades e tecnologias do seu cotidiano são utilizadas nas aulas de Física, faz com que essas se tornem mais motivadoras e interessantes. O material instrucional produzido, acompanhado de um guia de informações e orientações será publicado na série “Hipermídias de Apoio ao Professor de Física”, onde serão descritos os objetivos, a justificativa e a metodologia utilizados, com o intuito de que possam ser aplicados por outros professores associados à disciplina de Ciências da 8ª série. / This work proposes an alternative introduction of 8th grade Physics school contents through the study of Kinematics concepts present, e.g., in the students' daily sporting and leisure activities, in order to make these concepts more attractive and motivating to them. The situations have been registered in the schoolyard and gymnasium by the students themselves using a digital camera. The videoclips were then analyzed using an image analysis software (Tracker) in the school's computer laboratory. The subjects on the videoclips were selected among students' suggestions and assisted by the Science class teacher together with the author. The proposal has been carried out in Colégio São José, of Caxias do Sul, RS, with five different groups of 8th graders during Science classes, from September to November of 2008, these activities being alternated with regular classes. All material developed and used in the proposal was made available, during its application, on the School's Webpage. The planning and execution of this proposal are oriented along the social interaction theory of Lev Vygotsky. This choice is mainly motivated by the goal of promoting collaborative students work, intermediated by the teachers, providing and stimulating the taste for learning. The students evaluated the work by its conclusion through an opinion questionnaire. According to the students' answers to the questionnaire, when their daily activities were introduced in the Physics classes making use of available technology through electronic and computer devices, the Physics learning was rendered more interesting and motivating. The instructional material produced during the project application together with an information guide orienting other 8th grade Science teachers on its application will be published in the series “Hipermídias de Apoio ao Professor de Física”, where aims and methodology will also be described.