Submitted by Filipe dos Santos (fsantos@pucsp.br) on 2018-06-04T12:35:12Z No. of bitstreams: 1 Silvia Conceição Armada Martins.pdf: 2002002 bytes, checksum: 387c237efb674e73c9e882039d1166b8 (MD5) / Made available in DSpace on 2018-06-04T12:35:12Z (GMT). No. of bitstreams: 1 Silvia Conceição Armada Martins.pdf: 2002002 bytes, checksum: 387c237efb674e73c9e882039d1166b8 (MD5) Previous issue date: 2018-03-26 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / This paper aims at understanding how the development of a critical reflective approach in corporate education teachers, can contribute to a developmental process that is reflected in conscious practices in teaching-learning. This research is situated in the field of Applied Linguists, as it seeks to understand the development and transformation of its participants through language. The theoretical framework of this paper is founded on the Social-Historical-Cultural Theory as discussed by Vygotsky ([1930] 2008; [1934] 2001), Leontiev(1977) and Luria (1977); on the concepts of ZPD as discussed by Vygotsky ([1930] 1991) and expanded by Engeström (2011), Magalhães (2009), Newman e Holzman (2014); on the studies of sense and meaning (VYGOYSKY, [1930]2008); on the investigations on critical reflection conducted by Schön (2000), Freire (1970), Smith (1992), Liberali (1994) e Magalhães (2004; 2007; 2009); and on the studies of collaborative argumentation discussed by Liberali (2013). According to Magalhães (2004; 2011), the critical development of teachers take place in collective and critical collaborative learning contexts, that allow means to effectively answer to problems in private contexts, as well as, give directions to transformative actions. Therefore, the Critical Collaborative Research (MAGALHÃES, 2011), was chosen to be the methodological basis of this study. The research was carried out on a business context in corporate education with three participants, the researcher and two focal participants. The data was collected in four audio recorded phases. On the first phase, a class of each participant was observed. Phases two and three were dedicated to reflective meetings involving all the participants and the researcher, phase four comprehends an individual reflective meeting, between the researcher and participant. The data was analysed considering the argumentative cathegories proposed by Liberali (2013), Bronckart ([1997] 1999), Brookfield and Preskill (2005), Orsolini (2005), Pontecorvo (2005) and Leitão (2011), and focused on the language used by the participants during the intervention moments with the objective to answer the research questions and understand if the development of a critical reflective attitude contributes to conscious practices in teaching-learning. This study’s results reveal that the environment of confidence in the reflective meetings, contributed to the creation of a collaborative context, allowing the construction of ZPDs, reflection and the reorganization of ideas and concepts. This movement allowed that new sense and meaning on conscious practices in teaching-learning, emerged in the discourse / Esta pesquisa objetivou compreender como o fomento de uma postura críticoreflexiva do educador da Educação Corporativa pode contribuir para um processo de desenvolvimento docente que se reflita em práticas conscientes em ensinoaprendizagem. Esta pesquisa está inserida no campo da Linguística Aplicada, pois buscou compreender desenvolvimento e transformação de seus participantes sempre a partir da linguagem. Norteando a pesquisa, está a Teoria Sócio-Histórica- Cultural, como discutida nos trabalhos de Vygotsky ([1930] 2008; [1934] 2001), Leontiev (1977) e Luria ([1977] 2014); nos conceitos de ZDP discutidos por Vygotsky ([1930] 1991) e ampliados por Engeström (2011), Magalhães (2009), Newman e Holzman (2014); nos estudos sobre sentidos e significados conduzidos por Vygotsky ([1930] 2008); nas pesquisas sobre reflexão crítica, fundamentadas em Schön (2000), Freire (1970), Smith (1992), Liberali (1994) e Magalhães (2004; 2007; 2009); e nos trabalhos sobre argumentação colaborativa discutida por Liberali (2013). Segundo Magalhães (2004; 2011), a formação crítica de educadores acontece em contextos coletivos e crítico-colaborativos de aprendizagem e desenvolvimento, que propiciam meios para se responder eficazmente a problemas de contextos particulares, bem como apontam diretrizes para uma ação transformadora. Dessa forma, a pesquisa crítica de colaboração (PCCol) foi escolhida para fundamentar a análise metodológica deste estudo. A pesquisa foi realizada em um contexto empresarial de Educação Corporativa e contou com 2 participantes focais e a pesquisadora. A coleta de dados foi realizada em quatro etapas audiogravadas. Na primeira etapa, uma aula de cada participante focal foi observada. As etapas dois, três e quatro compreenderam três encontros reflexivos, sendo os dois primeiros com participação de todos os integrantes da pesquisa e o último conduzido individualmente. Os dados foram analisados segundo as categorias argumentativas propostas por Liberali (2013), Bronckart ([1997] 1999), Brookfield e Preskill (2005), Orsolini (2005), Pontecorvo (2005), Leitão (2011), com foco na linguagem usada pelos participantes no decorrer das etapas de intervenção, buscando responder às perguntas de pesquisa e compreender se o fomento de uma postura critico-reflexiva contribuiu para práticas conscientes em ensino-aprendizagem. Os dados sugerem que o ambiente de confiança que permeou os encontros reflexivos contribuiu para criação de um contexto de colaboração, propiciando construção de ZDPs, reflexões e reorganização de ideias e conceitos. Esse movimento permitiu que novos sentidos e significados sobre práticas conscientes em ensino-aprendizagem emergissem no discurso

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No. of bitstreams: 2 Dissertação - Laryssa Paulino de Queiroz Sousa - 2017.pdf: 2586764 bytes, checksum: 60296e68d33788a9ceaf5dff0b9da2b5 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-07-06 / This study focused on the discussion of critical language education (DUBOC, 2012, 2014; NORTON; PAVLENKO, 2004; OKAZAKI, 2005; PENNYCOOK, 1999, 2001, 2012, 2017; URZÊDA-FREITAS; PESSOA, 2014, among others) with English language teachers from a language school, located in Goiânia, through a collaborative experience of critical teacher education (ELLSWORTH, 1989; HAWKINS, NORTON, 2009; KUMARAVADIVELU, 2012; PESSOA; URZÊDA-FREITAS, 2012; SILVESTRE, 2016, among others). These theoretical perspectives are based on Critical Applied Linguistics (FABRÍCIO, 2006; MOITA LOPES, 2006a, 2006b, 2013a, 2013b; PENNYCOOK, 1990, 2001, 2004, 2006, 2008, 2010), in which the teaching-learning process is seen as a politicized act; the classroom is seen as a space of social practices; and teachers and students are seen as active agents of their realities. The research is characterized as qualitative (DENZIN; LINCOLN, 2013) and collaborative (IBIAPINA, 2008; TELES; IBIAPINA, 2009), and it was developed by a group of eight teachers and me in the period of September and December of 2015. During the study, the activities implemented were the reading and the discussion of six academic texts and the problematization of the teaching-learning process of English in the light of these texts. Thus, the objectives of this study were: 1) to discuss which reflections on critical language education stood out and 2) to problematize how the teacher education experience lived was characterized and how the educators interpreted it, grounded on Critical Applied Linguistics. An initial questionnaire, discussions of the focus group on selected texts (recorded in audio), interviews (also recorded in audio), field notes and personal narratives were the sources of the empirical material generated. In relation to the language teaching-learning process, the teachers focused on the discussion of their understandings on the critical language education perspective, in a way they could highlight their local realities and their agency, question conflicts and power relations in the classroom and problematize the teaching materials used in the school. With regard to language teacher education, teacher preparation and the challenges for the implementation of a critical work, principles related to this perspective and the care related to its development, and the hindrances and contributions of the research to the participating group stood out. / O estudo desenvolvido teve como enfoque a discussão da educação linguística crítica (DUBOC, 2012, 2014; NORTON; PAVLENKO, 2004; OKAZAKI, 2005; PENNYCOOK, 1999, 2001, 2012, 2017; URZÊDA-FREITAS; PESSOA, 2014, entre outros/as) com docentes de língua inglesa de uma escola de idiomas, localizada em Goiânia, por meio de uma experiência colaborativa de formação crítica docente (ELLSWORTH, 1989; HAWKINS; NORTON, 2009; KUMARAVADIVELU, 2012; PESSOA; URZÊDA-FREITAS, 2012; SILVESTRE, 2016, entre outros/as). Essas perspectivas teóricas são fundamentadas pela Linguística Aplicada Crítica (FABRÍCIO, 2006; MOITA LOPES, 2006a, 2006b, 2013a, 2013b; PENNYCOOK, 1990, 2001, 2004, 2006, 2008, 2010), na qual o processo de ensino-aprendizagem é visto como um ato politizado; a sala de aula, como um espaço de práticas sociais; e docentes e discentes, como agentes ativos/as de suas realidades. A pesquisa é caracterizada como qualitativa (DENZIN; LINCOLN, 2013) e colaborativa (IBIAPINA, 2008; TELES; IBIAPINA, 2009), tendo sido desenvolvida por um grupo de oito docentes e por mim no período de setembro a dezembro de 2015. Durante o estudo, as atividades implementadas foram: leitura e discussão de seis textos acadêmicos e problematização do processo de ensino-aprendizagem de inglês à luz desses textos. Assim, os objetivos do estudo foram: 1) discutir quais reflexões sobre educação linguística crítica se sobressaíram e 2) problematizar como se caracterizou e como os/as educadores/as interpretaram a experiência de formação docente vivenciada, fundamentada pela Linguística Aplicada Crítica. Questionário inicial, discussões do grupo focal sobre os textos selecionados (gravadas em áudio), entrevistas (também gravadas em áudio), anotações de campo e narrativas pessoais constituem as fontes do material empírico. Em relação ao processo de ensino-aprendizagem de línguas, os/as docentes enfocaram a discussão de suas compreensões sobre a perspectiva de educação linguística crítica, de modo a realçar suas realidades locais e sua agência, a questionar conflitos e relações de poder em sala de aula e a problematizar o material didático usado na escola. No que concerne à formação de professores/as de línguas, destacaram-se a preparação docente e os desafios para a implementação de um trabalho crítico, os princípios relacionados a essa perspectiva e cuidados relativos ao seu desenvolvimento e os entraves e as contribuições da pesquisa para o grupo participante.

Measuring the energy consumption of software components is a major building block for generating models that allow for energy-aware scheduling, accounting and budgeting. Current measurement techniques focus on coarse-grained measurements of application or system events. However, fine grain adjustments in particular in the operating-system kernel and in application-level servers require power profiles at the level of a single software function. Until recently, this appeared to be impossible due to the lacking fine grain resolution and high costs of measurement equipment. In this paper we report on our experience in using the Running Average Power Limit (RAPL) energy sensors available in recent Intel CPUs for measuring energy consumption of short code paths. We investigate the granularity at which RAPL measurements can be performed and discuss practical obstacles that occur when performing these measurements on complex modern CPUs. Furthermore, we demonstrate how to use the RAPL infrastructure to characterize the energy costs for decoding video slices.

Modern database systems have to process huge amounts of data and should provide results with low latency at the same time. To achieve this, data is nowadays typically hold completely in main memory, to benefit of its high bandwidth and low access latency that could never be reached with disks. Current in-memory databases are usually columnstores that exchange columns or vectors between operators and suffer from a high tuple reconstruction overhead. In this paper, we present the indexed table-at-a-time processing model that makes indexes the first-class citizen of the database system. The processing model comprises the concepts of intermediate indexed tables and cooperative operators, which make indexes the common data exchange format between plan operators. To keep the intermediate index materialization costs low, we employ optimized prefix trees that offer a balanced read/write performance. The indexed tableat-a-time processing model allows the efficient construction of composed operators like the multi-way-select-join-group. Such operators speed up the processing of complex OLAP queries so that our approach outperforms state-of-the-art in-memory databases.

Electronic systems of the future require a very high bandwidth communications infrastructure within the system. This way the massive amount of compute power which will be available can be inter-connected to realize future powerful advanced electronic systems. Today, electronic inter-connects between 3D chip-stacks, as well as intra-connects within 3D chip-stacks are approaching data rates of 100 Gbit/s soon. Hence, the question to be answered is how to efficiently design the communications infrastructure which will be within electronic systems. Within this paper approaches and results for building this infrastructure for future electronics are addressed.

VORWORT: Ikonisch verdichtet sich auf dem Umschlag dieser Broschüre das Selbstbild Dresdens. Von der Brühlschen Terrasse, „Balkon Europas“ genannt, geht der Blick auf die Kunstakademie, mit der gläsernen Kuppel des Kunstvereins, die mit einer eigenartigen Figur an ihrer Spitze besetzt ist, die sich beim näheren Hinsehen als Chimäre aus Nike und Fama zu erkennen gibt. Auf dem Sockel in der Bildmitte steht Gottfried Semper, der jene Oper baute, die heute medial auch als „das schönste Brauhaus Deutschlands“ bekannt ist. Und am hinteren Bildrand werden das neu errichtete Coselpalais, benannt nach der berühmten Mätresse August des Starken, und die wiedererrichtete Frauenkirche sichtbar. Sie ist das Stein gewordene Symbol für die Rekonstruktion des „alten“ Dresden und zugleich Objekt eines neu-alten Bürgerstolzes. Betrachtet man dieses Bild, mag es verständlich erscheinen, dass manche sagen, Dresden sei gar keine Stadt, sondern ein Mythos. Indes, so wäre zu entgegnen, macht der Mythos erst die Stadt. „Elbflorenz“ – das ist die Erzählung von barocker Schönheit, Liebe zur Kunst und Prunk der alten Residenz. Es ist ein Erinnerungsmythos, zugleich aber auch ein Mythos der Wiederbegründung. Zwischen beide schiebt sich der Mythos des Opfers: die Zerstörung Dresdens am 13. und 14. Februar 1945. In den Konflikten um die Kirchen- und die Stadtrekonstruktion, um die Restituierung von räumlicher Mitte und urbaner Identität, hat sich eine die Bürgerschaft mobilisierende Energie zu erkennen gegeben. Sie hat es vermocht, dass mehr als drei Viertel der Kosten für den Wiederaufbau der Kirche von privaten Geldgebern gespendet wurde. Zugleich hat diese gemeinsinnige Kraft aber auch bei der Bebauung der die Frauenkirche umgebenden Brachen zu einer Emphase historistischer Rekonstruktionstreue auf dem Neumarkt geführt. In der Erzählung von Zerstörung und Wiederauferstehung verschränken sich mithin mythische Eigentranszendierung der Stadt und aktuelle Gemeinsinnsbehauptungen in einer höchst spannungsvollen Weise. Dresden illustriert die Fragestellung des Sonderforschungsbereichs, der in dieser Stadt auch seinen Sitz hat. Der Sonderforschungsbereich 804 „Transzendenz und Gemeinsinn“ wurde im Mai 2009 von der Deutschen Forschungsgemeinschaft bewilligt und besteht seit dem 1. Juli 2009 an der Technischen Universität Dresden. Er umfasst 20 Teilprojekte aus drei Fakultäten und neun Instituten der TU Dresden sowie von Partnern der italienischen Universitäten Turin und Matera und der Universität Zürich, Schweiz. Zudem besitzt der SFB 804 ein Integriertes Graduiertenkolleg zur Ausbildung von Doktoranden und internationalen Stipendiaten. Das Forschungsprogramm sieht vor, jenseits herkömmlicher Epocheneinteilungen Ordnungsformationen wie Stadt, Republik, Demokratie, Nation, bürgerliche Gesellschaft, Adel und Hof, religiöse und nicht-religiöse Gemeinschaften miteinander zu vergleichen. Stets geht es um die Analyse des spannungsvollen Zusammenspiels von Transzendenzformen und Gemeinsinnsvorstellungen bei Entstehung, Stabilisierung und Scheitern von vormodernen und modernen sozialen und politischen Ordnungen. Mit dieser interdisziplinär und international vernetzten Fragestellung setzt der SFB 804 die erfolgreiche Grundlagenforschung der Dresdner Geistes-, Sozial- und Kulturwissenschaften fort, die in der zweiten Hälfte der 1990er Jahre mit dem Sonderforschungsbereich 537 „Institutionalität und Geschichtlichkeit“ und einem Internationalen Graduiertenkolleg begonnen hat. Die folgenden Seiten beabsichtigen, den gemeinsamen Forschungsansatz und die Ziele der einzelnen Projekte des SFB 804 der wissenschaftlichen und interessierten Öffentlichkeit vorzustellen. Sie möchten auch zu Anregung und Auseinandersetzung einladen.

Network Coding is a new possibility to transmit data through a network. By combining different packets instead of simply forwarding, network coding offers the opportunity to reach the Min-Cut/Max-Flow capacity in multicast data transmissions. However, the basic schemes are vulnerable to so-called pollution attacks, where an attacker can jam large parts of the transmission by infiltrating only one bogus message. In the literature we found several approaches which aim at handling this kind of attack with different amounts of overhead. Though, the cost for a specific secure network coding scheme highly depends on the underlying network. The goal of this paper is on the one hand to describe which network parameters influence the efficiency of a certain scheme and on the other hand to provide concrete suggestions for selecting the most efficient secure network coding scheme considering a given network. We will illustrate that there does not exist “the best” secure network scheme concerning efficiency, but all selected schemes are more or less suited under certain network topologies.

Probabilistic-Write/Copy-Select (PWCS) is a novel synchronization scheme suggested by Nicholas Mc Guire which avoids expensive atomic operations for synchronizing access to shared objects. Instead, PWCS makes inconsistencies detectable and recoverable. It builds on the assumption that, for typical workloads, the probability for data races is very small. Mc Guire describes PWCS for multiple readers but only one writer of a shared data structure. In this paper, we report on the formal analysis of the PWCS protocol using a continuous-time Markov chain model and probabilistic model checking techniques. Besides the original PWCS protocol, we also considered a variant with multiple writers. The results were obtained by the model checker PRISM and served to identify scenarios in which the use of the PWCS protocol is justified by guarantees on the probability of data races. Moreover, the analysis showed several other quantitative properties of the PWCS protocol.

Our paper presents some preliminary observation from a collaborative exploratory study linking mathematics, science and reading within a technology enhanced problem-based learning scenario conducted at one French Canadian Elementary and Middle School. Presented in a form of dialogue between teacher and researcher, our findings give some meaningful insight in how an innovative mathematics teaching can be developed and implemented using a real-world problem solving. Instead of a traditional presentation of material about lighting up homes, participating mathematics, science and French teachers were working collaboratively with the ICT integration mentor and two university professors helping students investigate a problem from various perspectives using a variety of cognitive and metacognitive strategies, discussing and sharing the finding with peers and presenting them to a larger audience using media tools. Our preliminary results may prompt further investigation of how innovation in teaching and learning can help students become better critical thinkers and scientifically empowered citizens.

This work is part of the umbrella project collaborative educational activities in school settings - ACECE (TICKS 2012), which constitutes a proposal for collaborative continuing education in such, as a theoretical and methodological perspective, allows, in the context of the investigated group (a public school in Santa Maria, RS), build a space for reflection, critique and negotiation, about the developed discursive practices, as well as the relation to the objectives previously defined by the social actors involved (in-service teachers in that school context and researchers from UFSM) (MAGALHÃES & GENTLEMAN, 2008, p. 114; MAGALHÃES, 2002, p 48). As part of this research, the present study investigates the reflection process developed during the theoretical and practical discussions (reflective sessions) developed over the continuing education program ACECE, in 2012, seeking to understand assumed teachers roles by the teachers and how these roles are configured lexicon grammatically. The corpus is consisted of transcripts of three (3) reflective sessions developed throughout 2012 in order to discuss the concept of literacy and to develop socially situated educational activities. For the analysis, we considered two textual characteristics: modality and evaluation (FAIRCLOUGH, 2003, p. 159), as these give an indication of the commitment of the participants with their texts. These categories were organized by Fairclough (2003), based on the contributions of Systemic Functional Grammar (HALLIDAY, 1994). The results in the analysis of the first section show an initial alignment of participants to two specific identity positions: engagement (60%) and non-engagement (40%) to the reflective process developed in the continuing education program. This initial alignment remains evident in the mid-reflective process, but with an engagement expansion of participants (71% of occurrence). We have identified, in the discourse of participants who took an engagement attitude to the reflective process throughout the continuing education program, two teachers roles. Specifically, these two roles are related to two images: as a centralizing teacher position in the learning process and a reflective teacher position. At the end of the reflective process, the analysis revealed an alignment of teachers to a single identity position: engagement to the reflective process developed in the continuing education program. Thus, in summary, through the Third reflection space (PASSIONI, 2012, p.180), the teachers promoted the development of reflective thinking spaces that resulted in (de/re) construction of their professional identity to assume discursively the role of reflective teachers. Finally, we hope that the actions developed at school can support other studies that focus on school context research and practices that may foster new initiatives of teachers continuing education (SILVA, 2014, p. 130). / Este trabalho integra o projeto guarda-chuva Atividades colaborativo-educacionais em contextos escolares A.C.E.C.E. (TICKS, 2012), o qual se constitui em uma proposta de formação continuada colaborativa na medida em que, como perspectiva teórico-metodológica, permite, no contexto do grupo investigado (uma escola pública de Santa Maria, RS), construir um espaço de reflexão, de crítica e de negociação sobre as práticas discursivas desenvolvidas, bem como sua relação com os objetivos previamente definidos pelos atores sociais em questão (professoras em serviço atuando no referido contexto escolar e pesquisadores da UFSM) (MAGALHÃES & FIDALGO, 2008, p. 114; MAGALHÃES, 2002, p. 48). Como parte desta investigação, a presente pesquisa analisa o processo reflexivo desencadeado durante as discussões teórico-práticas (sessões reflexivas) desenvolvidas ao longo do curso de formação continuada A.C.E.C.E, no ano de 2012, procurando desvelar os papéis docentes assumidos pelas professoras participantes e como estes se configuram léxico-gramaticalmente. O corpus foi constituído por transcrições de três (3) sessões reflexivas desenvolvidas ao longo de 2012, a fim de problematizar o conceito de letramento e desenvolver atividades pedagógicas socialmente situadas. Para a análise, levamos em consideração duas características textuais: a modalidade e a avaliação (FAIRCLOUGH, 2003, p. 159), uma vez que estas dão indicação do comprometimento das participantes com seus textos. Essas categorias foram organizadas por Fairclough (2003), com base nas contribuições oferecidas pela Gramática Sistêmico-Funcional (HALLIDAY, 1994). Os resultados da análise da primeira sessão revelam um alinhamento inicial das participantes a duas posições identitárias específicas: de engajamento (60%) e não engajamento (40%) ao processo reflexivo desenvolvido no programa de formação continuada. Esse alinhamento inicial continua evidente na metade do processo reflexivo, mas com expansão do engajamento das participantes (71% de ocorrência). Identificamos, no discurso das participantes que assumiram uma atitude de engajamento ao processo reflexivo constituído pelo programa de formação continuada, dois papéis docentes. Especificamente, esses dois papéis estão relacionados a duas imagens; de professora centralizadora do processo de aprendizagem e de professora reflexiva. Ao final da caminhada reflexiva, a análise revelou um alinhamento das professoras a uma única posição identitária: de engajamento ao processo reflexivo desenvolvido no curso de formação continuada. Assim e em síntese, por meio do Terceiro Espaço de reflexão (PASSIONI, 2012, p.180), as professoras promoveram espaços de desenvolvimento do pensamento reflexivo que resultou na (des/re)construção da identificação profissional das professoras participantes que, no discurso, mostram assumir o papel de professoras reflexivas. Por fim, esperamos que as ações desenvolvidas na escola possam subsidiar outros estudos que se concentrem na investigação do contexto escolar e que possam fomentar novas iniciativas de formação continuada de professores (SILVA, 2014, p. 130).