Made available in DSpace on 2016-04-28T18:23:35Z (GMT). No. of bitstreams: 1 Rogeria pdf.pdf: 1154375 bytes, checksum: 5eec0f2cc9effbdf70507fb2cd5fdd9a (MD5) Previous issue date: 2005-05-12 / This is the collaborative research account realized with a mother tongue teacher returning to classroom after ten years out. The research is proposed to a reflexive space to confront different curricula politics concerning teaching portuguese as mother tongue. The goal is describe how the other teacher s practices and professional identity are constituted. The languge and the teaching language are based on post-structuralist perspective to understand the discourse constitutive and constituted by individual actions in the social world. The focus on the constituve nature of discourse need an analytical intruments to reveal the agency. Thus, the metaphor (Lakoff & Johnson, 1980; Cameron, 1999) as discursive practices and the positioning theory (van Langenhove & Harré, 1998) show up very productive to describe desires, choices and actions of co-researchers. In a qualitative way, the research identify grammar, discourse genre and reading as teaching practices questioned in the reflexive-collaborative process. The grammar and the discourse genre are the theoretical constructs directly confronted. Although the opposite presented theoretical constructs, they are conciliated by portuguese mother tongue teacher / Este é o relato de uma pesquisa colaborativa realizada por mim e por uma professora de língua materna que, após dez anos de afastamento da prática docente, retorna à sala de aula. Trata-se de uma pesquisa que se propõe como um espaço reflexivo no qual são confrontadas diferentes políticas curriculares do ensino de português como língua materna. O objetivo é descrever como são constituídas outras práticas discursivas e outras identidades profissionais pela professora durante o processo reflexivo-colaborativo. A linguagem e o ensino de línguas são tomados com base na perspectiva pós-estruturalista que aborda o discurso como constituinte das/constituído pelas ações dos indivíduos no mundo social. O foco na natureza constitutiva dos discursos exige um instrumental analítico que ressalte a agentividade, dessa forma, a metáfora (Lakoff & Johnson, 1980; Cameron, 1999; entre outros) como prática discursiva e a teoria do posicionamento (van Langenhove & Harré, 1998) mostram-se bastante produtivas para descrever os desejos, as escolhas e as ações das co-pesquisadoras. De maneira qualitativa, a pesquisa identifica a gramática, a teoria dos gêneros discursivos e a leitura como as práticas de ensino problematizadas durante o processo reflexivo-colaborativo, sendo a gramática e a teoria dos gêneros discursivos os construtos teóricos confrontados diretamente. Apesar da forma excludente como são situados na pesquisa, esses construtos teóricos são, ao final, conciliados pela professora ao constituir para si uma outra prática e identidade como professora de português como língua materna

In this paper, we analyze the achievable secrecy rates in the two-hop wiretap channel with four nodes, where the transmitter and the receiver have multiple antennas while the relay and the eavesdropper have only a single antenna each. The relay is operating in amplify-and-forward mode and all the channels between the nodes are known perfectly by the transmitter. We discuss different transmission and protection schemes like artificial noise (AN). Furthermore, we introduce interference neutralization (IN) as a new protection scheme. We compare the different schemes regarding the high-SNR slope and the high-SNR power offset and illustrate the performance by simulation results. It is shown analytically as well as by numerical simulations that the high SNR performance of the proposed IN scheme is better than the one of AN.

Die dritte Sektion der Dresden Summer School behandelte die für die wissenschaftliche Arbeit am Museum zentralen Aspekte Datenbanken, Inventarisierung und Provenienzforschung. Alle diese Punkte sind eng mit dem Thema Digitalisierung verbunden, greifen die genannten Arbeitsbereiche doch mittlerweile standardmäßig auf Datenbanken und elektronische Systeme zur Erfassung, Dokumentation und Erforschung der musealen Bestände zurück. (...)

Der Besuch des im Bau befindlichen Staatlichen Museums für Archäologie Chemnitz bot den Teilnehmerinnen und Teilnehmern der Dresden Summer School 2012 die Möglichkeit, die Planung eines von Grund auf neuen Museums mit einer sehr modernen Ausstellungsarchitektur und Medieninszenierung durch die Mitarbeiter und den leitenden Ausstellungsgestalter kennenzulernen. (...)

Das Münzkabinett ist – obwohl zentral im Georgenbau am Residenzschloss untergebracht – eines der weniger intensiv besuchten Museen der Staatlichen Kunstsammlungen Dresden.1 Dies liegt vor allem an der durch laufende Baumaßnahmen bedingten Begrenztheit der Präsentationsräume. Während die 30.000 Bände umfassende Spezialbibliothek und der Studiensaal interessierten Fachbesuchern Detailstudien ermöglichen, steht der Sammlungspräsentation aufgrund des Umbaus der Ausstellungsräume nur ein kleines Rondell im Hausmannsturm des Residenzschlosses zur Verfügung. (...)

Im Zentrum eines guten und effektiven Social Media-Konzepts steht zunächst immer ein interessanter und relevanter Inhalt, der eine Institution repräsentiert und den Nutzern Anlass gibt, mit ihr in Dialog zu treten. Unter den während der Dresden Summer School 2012 vorgestellten Kulturschätzen genoss ein Exponat besondere Aufmerksamkeit und bot viele inhaltliche und mediale Anknüpfungspunkte für die Entwicklung eines Social Media-Projekts: (...)

Ob Kunstmuseum oder ethnographische Sammlung, ob Militärhistorisches Museum oder Münzkabinett: In einem vielfältigen Angebotsspektrum ringen große und kleine Museen um die Gunst der Besucher. Die Struktur des Zielpublikums ist dabei in der Regel sehr weit gefasst, da im Sinne des Bildungsauftrags möglichst viele soziale Milieus oder Altersgruppen angesprochen werden sollen. Das Informationsmaterial zur Vermittlung der Ausstellungsinhalte, wie Ausstellungskataloge, Audioguides, Flyer oder der Internetauftritt der jeweiligen Institutionen, enthält eine Vielzahl von weiterführenden Informationen, die in der Regel nur teilweise zielgruppenspezifisch aufbereitet werden, da die Adressaten jeweils nur schwer eingegrenzt werden können. (...)

This classroom ethnography documents the developing critical literacy pedagogy of an English for Academic Purposes (EAP) instructor over the course of several terms. My research, which involved extensive collaboration with the EAP instructor, explores how specific classroom practices and discourses are enacted and mediated through dialogic intertextualities, material objects, and social actions that frame representations about language, literacy, and what Lefebvre (1988) called “le quotidien” – the everyday, and how these affect the students’ meaning-making potential in specific ways. It also traces the contours (and detours) of the instructor’s classroom practices after the researcher’s mediation in the form of collaborative inquiries on functional grammar and critical literacy, and the effects of these classroom practices on making meaning in her EAP classes. I consider several issues from an integrated theory and practice perspective. Because of an urgent need to understand the students’ practices and epistemologies as they engage in ever newer forms of multimodal text productions, I contend that EAP classroom practices must be reshaped to facilitate more (inter)active engagements of the multimodal texts that saturate students’ lives, both inside the class and outside. Related to this, I highlight in my classroom data what actually counts as the ‘critical’ or the ‘uncritical’ in this EAP classroom and argue why these distinctions matter. Lastly, I suggest ways in which the role of a critical multiliteracies education in EAP can meet the pragmatic needs of both students and teachers. My research contributes to a much-needed dialogue between critically oriented researchers and practitioners in the field of TESOL/Applied Linguistics by bridging the gap between theory and practice. The lessons learned from this collaborative classroom praxis point to concrete ways to help EAP teachers and students utilize their meaning-making potential. This involves equipping them with an expanded social semiotic tool-kit that can enable them to not only meet their immediate academic needs, but also help create a more active and possibly transformative role in the social constructions of discourse, language, and society. This doctoral dissertation has implications for those who are involved in EAP teaching and research, curriculum planning, teacher training, and student needs assessment.

This classroom ethnography documents the developing critical literacy pedagogy of an English for Academic Purposes (EAP) instructor over the course of several terms. My research, which involved extensive collaboration with the EAP instructor, explores how specific classroom practices and discourses are enacted and mediated through dialogic intertextualities, material objects, and social actions that frame representations about language, literacy, and what Lefebvre (1988) called “le quotidien” – the everyday, and how these affect the students’ meaning-making potential in specific ways. It also traces the contours (and detours) of the instructor’s classroom practices after the researcher’s mediation in the form of collaborative inquiries on functional grammar and critical literacy, and the effects of these classroom practices on making meaning in her EAP classes. I consider several issues from an integrated theory and practice perspective. Because of an urgent need to understand the students’ practices and epistemologies as they engage in ever newer forms of multimodal text productions, I contend that EAP classroom practices must be reshaped to facilitate more (inter)active engagements of the multimodal texts that saturate students’ lives, both inside the class and outside. Related to this, I highlight in my classroom data what actually counts as the ‘critical’ or the ‘uncritical’ in this EAP classroom and argue why these distinctions matter. Lastly, I suggest ways in which the role of a critical multiliteracies education in EAP can meet the pragmatic needs of both students and teachers. My research contributes to a much-needed dialogue between critically oriented researchers and practitioners in the field of TESOL/Applied Linguistics by bridging the gap between theory and practice. The lessons learned from this collaborative classroom praxis point to concrete ways to help EAP teachers and students utilize their meaning-making potential. This involves equipping them with an expanded social semiotic tool-kit that can enable them to not only meet their immediate academic needs, but also help create a more active and possibly transformative role in the social constructions of discourse, language, and society. This doctoral dissertation has implications for those who are involved in EAP teaching and research, curriculum planning, teacher training, and student needs assessment.

We compare LDPC block and LDPC convolutional codes with respect to their decoding performance under low decoding latencies. Protograph based regular LDPC codes are considered with rather small lifting factors. LDPC block and convolutional codes are decoded using belief propagation. For LDPC convolutional codes, a sliding window decoder with different window sizes is applied to continuously decode the input symbols. We show the required Eb/N0 to achieve a bit error rate of 10 -5 for the LDPC block and LDPC convolutional codes for the decoding latency of up to approximately 550 information bits. It has been observed that LDPC convolutional codes perform better than the block codes from which they are derived even at low latency. We demonstrate the trade off between complexity and performance in terms of lifting factor and window size for a fixed value of latency. Furthermore, the two codes are also compared in terms of their complexity as a function of Eb/N0. Convolutional codes with Viterbi decoding are also compared with the two above mentioned codes.