Malware analysts often need to search large corpuses of obfuscated binaries for particular sequences of related instructions. The use of simple tactics, such as dead code insertion and register renaming, prevents the use of conventional, big-data search indexes. Current, state of the art malware detectors are unable to handle the size of the dataset due to their iterative approach to comparing files. Furthermore, current work is also frequently designed to act as a detector and not a search tool. I propose a system that exploits the observation that many data/control-flow relationships between instructions are preserved in the presence of obfuscations. The system will extract chains of flow-dependent instructions from a binary’s Program Dependence Graph (PDG). It will then use a representation of each chain as a key for an index that points to lists of functions (and their corresponding files). Analysts will be able to quickly search for instruction sequences by querying the index.

Tese (doutorado)—Universidade de Brasília, Instituto de Psicologia, Departamento de Processos Psicológicos Básicos, Pós-Graduação em Ciências do Comportamento, 2014. / Submitted by Ana Cristina Barbosa da Silva (annabds@hotmail.com) on 2015-03-24T20:32:52Z No. of bitstreams: 1 2014_ClarissadePontesVieiraNogueira.pdf: 4388778 bytes, checksum: 2798778efcda752db5726cfbfbc799fc (MD5) / Approved for entry into archive by Ruthléa Nascimento(ruthleanascimento@bce.unb.br) on 2015-04-29T16:58:01Z (GMT) No. of bitstreams: 1 2014_ClarissadePontesVieiraNogueira.pdf: 4388778 bytes, checksum: 2798778efcda752db5726cfbfbc799fc (MD5) / Made available in DSpace on 2015-04-29T16:58:01Z (GMT). No. of bitstreams: 1 2014_ClarissadePontesVieiraNogueira.pdf: 4388778 bytes, checksum: 2798778efcda752db5726cfbfbc799fc (MD5) / A utilização do conceito metacontingência em pesquisas experimentais foi iniciada em 2004 por Vichi, com a utilização de um modelo experimental denominado Modelo da Matriz. Nos últimos 10 anos, outros modelos experimentais foram utilizados nestas pesquisas, destacando-se o modelo que utiliza o software Meta e o Jogo do Dilema do Prisioneiro com a adição de uma consequência cultural. O presente estudo utiliza este último modelo em um delineamento fatorial 2 x 2 x 2 para investigar o efeito das seguintes variáveis bem como de suas interações: comunicação (com ou sem comunicação), tipo de escolha (sequencial ou simultânea) e iniquidade de reforços (iniquidade relativa ou absoluta). Os 72 participantes foram divididos em 24 grupos de 3. Cada grupo foi exposto a apenas uma combinação específica das VIs, por uma sessão com uma duração média de 60 minutos. O delineamento utilizado foi ABA. A cada tentativa cada participante deveria escolher entre as alternativas X ou Y. A quantidade de pontos individuais recebida por cada participante dependia da combinação entre as escolhas dos três participantes a cada tentativa de acordo com as equações: Y = n x 4 / X = Y + 7, nas quais n é o número de participantes que escolheram a opção Y. Na Condição B, além dos pontos individuais, foi introduzida uma metacontingência em que havia a liberação de 60 pontos para o grupo contingente à produção do entrelaçamento YXX. O critério de estabilidade utilizado na Condição B foi a produção do entrelaçamento alvo em 80% das 10 últimas tentativas ou um máximo de 400 tentativas. As duas apresentações da Condição A tiveram uma duração de 50 tentativas cada. Os resultados sugerem a variável Iniquidade Absoluta como sendo a que mais dificulta a seleção do entrelaçamento alvo. A variável Sem Comunicação não impediu a seleção do entrelaçamento, no entanto, dificultou a manutenção da produção do entrelaçamento pelo grupo em tentativas posteriores ao cumprimento do critério de estabilidade. A interação entre pelo menos duas das seguintes variáveis facilitou a aquisição do entrelaçamento alvo: Com Comunicação, Escolhas Sequenciais e Iniquidade Relativa. ______________________________________________________________________________ ABSTRACT / The use of the concept metacontingency in experimental research was started in 2004 by Vichi, using an experimental model called The Matrix Model. Over the past 10 years, other experimental models were used in these studies, highlighting the model that uses the Meta software and the Prisoner's Dilemma Game with the addition of a cultural consequence. This study uses the latter model in a 2 x 2 x 2 factorial design to investigate the effect of the following variables and their interactions: communication (with or without communication), type of choice (sequential or simultaneous) and inequity of reinforcements (relative or absolute inequity) . 72 participants were divided in 24 groups of 3. Each group was exposed to only a specific combination of IVs, for a session with an average duration of 60 minutes. The experimental design was ABA. In each trial each participant had to choose between the alternatives X or Y. The amount of points received by each participant depended on the combination of the choices of the three participants according to the equations: Y = n x 4 / X + Y = 7, in which n is the number of participants choosing Y. In Condition B, in addition to individual points, a metacontingency was introduced in which 60 points were released contingent on the production of the combination YXX. The stability criterion used in Condition B was the production of the target combination in 80% of the last 10 trials or a maximum of 400 trials. The two presentations of Condition A lasted for 50 trials each. The results suggest the variable Absolute Inequity as a great hindrance for the selection of the target combination. The variable No Communication did not prevent the selection of the combination, however, it is difficult to maintain the production of the combination by the group after the completion of the stability criterion. The interaction between at least two of the following variables facilitated the acquisition of target combination: With Communication, Sequential Choices and Relative Iniquity.

Modulation of PGs by inhibition or stimulation is a promising approach for the management of pain and inflammation in patients with rheumatic disease. Based on recent results from our laboratories as well as on the literature, we hypothesise that Prostaglandin D[subscript 2] (PGD[subscript 2]) is an important anabolic agent for osteoblasts. Our results show that the PGD[subscript 2] decreases the osteoblasts proliferation acting probably through the CRTH2 receptor. Surprisingly, when DK-PGD[subscript 2] was used alone or with Naproxen, although the proliferation decreased with the dose, it seemed to be restored to the control level at higher concentrations of DK-PGD[subscript 2] . Thus, we hypothesise the existence of other compensatory mechanisms. The PGD[subscript 2] had no relevant effect alone or when used with Naproxen, but seemed to decrease the osteoblast differentiation when used with Diclofenac at a higher concentration only. When vitamin D was added to all conditions, PGD[subscript 2] had an inhibitory effect on the differentiation (dose-response), but this could not be replicated when Naproxen was used. In a test with Diclofenac, we can assume a decreasing trend-line for differentiation when augmenting the PGD[subscript 2] dose, but the effect is not statistically relevant. In a competition test with PGD[subscript 2] and DP/CRTH2 antagonists, blocking DP receptor yielded no effect on differentiation, and blocking the CRTH2 receptor showed a relevant decrease at high concentration of PGD[subscript 2]. The effect was similar in a test with PGD[subscript 2] and PPAR[gamma] antagonist suggesting that it might have a compensatory, positive effect that reversed DP activation. The PGD[subscript 2] has a slight positive effect on the osteoblast matrix mineralisation (with Naproxen), but not through its receptors since use of DP/CRTH2 antagonists did not abrogate this. In a competition test with PGD[subscript 2] and DP/CRTH2 antagonists we had no response. When we used the PGD[subscript 2] in the presence of PPAR[gamma] antagonist, the calcification decreased significantly, indicating that the positive effect of PGD[subscript 2] on calcification works rather through this receptor.

Submitted by Israel Vieira Neto (israel.vieiraneto@ufpe.br) on 2015-03-06T11:37:27Z No. of bitstreams: 2 DISSERTAÇÃO Marcia Fernanda dos Santos.pdf: 1653347 bytes, checksum: 977edb60e1bb89a1b772b0f93568a300 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) / Made available in DSpace on 2015-03-06T11:37:27Z (GMT). No. of bitstreams: 2 DISSERTAÇÃO Marcia Fernanda dos Santos.pdf: 1653347 bytes, checksum: 977edb60e1bb89a1b772b0f93568a300 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2013-12-18 / O setor sucroalcooleiro do Brasil tem passado por transformações ultimamente, mais especificamente em Pernambuco. A mais impactante delas foi o fim da tutela governamental, que lhe regulou as atividades até 1990, e que deixou na maioria dos gerentes das empresas do setor uma sensação de orfandade. De janeiro de 2011 a setembro de 2013 foram desenvolvidos seis PDGs nas usinas de açúcar e álcool do estado de Pernambuco. Este estudo foi realizado com o objetivo de compreender a percepção dos gestores de recursos humanos e gerentes participantes sobre as contribuições destes PDGs para a sua prática gerencial. Para tanto, quarenta e dois participantes responderam a uma pesquisa do tipo survey, objetivando a descrição de variáveis sociodemográficas e profissionais. Em seguida, foram analisados os conteúdos programáticos dos PDGs. Na sequência, entrevistas foram realizadas com os gerentes de RH de quatro das empresas que realizaram os referidos PDGs. Finalmente, foi realizado um grupo focal com cinco gestores participantes de PDGs. O discurso produzido no grupo focal foi analisado por meio do método do Discurso do Sujeito Coletivo (DSC). Os resultados da pesquisa mostraram que: 1) os programas dos cursos, em sua maior parte, não são construídos com base em diagnóstico prévio das demandas de desenvolvimento específicas da empresa contratante; 2) os PDGs podem estar sendo ser adotados por mimetismo; 3) os gerentes percebem que os PDGs contribuem para a prática da gestão, com destaque para o desenvolvimento de competências comportamentais; e por ultimo 4) Os PDGs se propõem a desenvolver competências desalinhadas com as demandas descritas pelos gerentes do setor sucroalcooleiro.

On s’intéresse dans cette thèse à la PGD (Proper Generalized Decomposition), l’une des méthodes de réduction de modèles qui consiste à chercher, a priori, la solution d’une équation aux dérivées partielles sous forme de variables séparées. Ce travail est formé de cinq chapitres dans lesquels on vise à étendre la PGD aux espaces fractionnaires et aux espaces des fonctions à variation bornée, et à donner des interprétations théoriques de cette méthode pour une classe de problèmes elliptiques et paraboliques. Dans le premier chapitre, on fait un bref aperçu sur la littérature puis on présente les notions et outils mathématiques utilisés dans le corps de la thèse. Dans le second chapitre, la convergence des suites des directions alternées (AM) pour une classe de problèmes variationnels elliptiques est étudiée. Sous une condition de non-orthogonalité uniforme entre les itérés et le terme source, on montre que ces suites sont en général bornées et compactes. Alors, si en particulier la suite (AM) converge faiblement alors elle converge fortement et la limite serait la solution du problème de minimisation alternée. Dans le troisième chapitre, on introduit la notion des dérivées fractionnaires au sens de Riemann-Liouville puis on considère un problème variationnel qui est une généralisation d’ordre fractionnaire de l’équation de Poisson. En se basant sur la nature quadratique et la décomposabilité de l’énergie associée, on démontre que la suite PGD progressive converge fortement vers la solution faible de ce problème. Dans le quatrième chapitre, on profite de la structure tensorielle des espaces BV par rapport à la topologie faible étoile pour définir les suites PGD dans ce type d’espaces. La convergence de telle suite reste une question ouverte. Le dernier chapitre est consacré à l’équation de la chaleur d-dimensionnelle, où on discrétise en temps puis à chaque pas de temps on cherche la solution de l’équation elliptique en utilisant la PGD. On montre alors que la fonction affine par morceaux en temps obtenue à partir des solutions construites en utilisant la PGD converge vers la solution faible de l’équation. / In this thesis, we are interested in the PGD (Proper Generalized Decomposition), one of the reduced order models which consists in searching, a priori, the solution of a partial differential equation in a separated form. This work is composed of five chapters in which we aim to extend the PGD to the fractional spaces and the spaces of functions of bounded variation and to give theoretical interpretations of this method for a class of elliptic and parabolic problems. In the first chapter, we give a brief review of the litterature and then we introduce the mathematical notions and tools used in this work. In the second chapter, the convergence of rank-one alternating minimisation AM algorithms for a class of variational linear elliptic equations is studied. We show that rank-one AM sequences are in general bounded in the ambient Hilbert space and are compact if a uniform non-orthogonality condition between iterates and the reaction term is fulfilled. In particular, if a rank-one (AM) sequence is weakly convergent then it converges strongly and the common limit is a solution of the alternating minimization problem. In the third chapter, we introduce the notion of fractional derivatives in the sense of Riemann-Liouville and then we consider a variational problem which is a generalization of fractional order of the Poisson equation. Basing on the quadratic nature and the decomposability of the associated energy, we prove that the progressive PGD sequence converges strongly towards the weak solution of this problem. In the fourth chapter, we benefit from tensorial structure of the spaces BV with respect to the weak-star topology to define the PGD sequences in this type of spaces. The convergence of this sequence remains an open question. The last chapter is devoted to the d-dimensional heat equation, we discretize in time and then at each time step one seeks the solution of the elliptic equation using the PGD. Then, we show that the piecewise linear function in time obtained from the solutions constructed using the PGD converges to the weak solution of the equation.

Code clones are pieces of code that have the same functionality. While some clones may structurally match one another, others may look drastically different. The inclusion of code clones clutters a code base, leading to increased costs through maintenance. Duplicate code is introduced through a variety of means, such as copy-pasting, code generated by tools, or developers unintentionally writing similar pieces of code. While manual clone identification may be more accurate than automated detection, it is infeasible due to the extensive size of many code bases. Software code clone detection methods have differing degree of success based on the analysis performed. This thesis outlines a method of detecting clones using a program dependence graph and subgraph isomorphism to identify similar subgraphs, ultimately illuminating clones. The project imposes few constraints when comparing code segments to potentially reveal more clones.

Product development requires that engineers have the ability to predict product performance. When product performance involves complex physics and natural phenomena, mathematical models are often insufficient to provide accurate predictions. Engineering companies compensate for this deficiency by testing prototypes to obtain empirical data that can be used in place of predictive models. The purpose of this work is to provide techniques and methods for efficient use of empirical methods in product development processes. Empirical methods involve the design and creation of prototype hardware and the testing of that hardware in controlled environments. Empirical methods represent a complete product development sub-cycle within the overall product development process. Empirical product development cycles can be expensive in both time and resources. Global economic pressures have caused companies to focus on improving the productivity of their product development cycles. A variety of techniques for improving the productivity of product development processes have been developed. These methods focus on structuring process steps and product artifacts for reuse and efficiency. However these methods have, to this point, largely ignored the product development sub-cycle of empirical design. The same techniques used on the overall product development processes can and should be applied to the empirical product development sub-cycle. This thesis focuses on applying methods of efficient and reusable product development processes on the empirical development sub-cycle. It also identifies how to efficiently link the empirical product development sub-cycle into the overall product development process. Specifically, empirical product development sub-cycles can be characterized by their purposes into three specific types: first, obtaining data for predictive model coefficients, boundary conditions and driving functions; second, validating an existing predictive model; and third, to provide the basis for predictions using interpolation and extrapolation of the empirical data when a predictive model does not exist. These three types of sub-cycles are structured as reusable processes in a standard form that can be used generally in product development. The roles of these three types of sub-cycles in the overall product development process are also established and the linkages defined. Finally, the techniques and methods provided for improving the efficiency of empirical methods in product development processes are demonstrated in a form that shows their benefits.

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Submitted by JOSIANE SANTOS DE OLIVEIRA (josianeso) on 2017-05-29T14:26:45Z No. of bitstreams: 1 Joseane Matias_.pdf: 6446969 bytes, checksum: a2da8204f9ca340b612ba0f9dab4ca20 (MD5) / Made available in DSpace on 2017-05-29T14:26:45Z (GMT). No. of bitstreams: 1 Joseane Matias_.pdf: 6446969 bytes, checksum: a2da8204f9ca340b612ba0f9dab4ca20 (MD5) Previous issue date: 2017-02-16 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Produzir textos na escola é uma tarefa desafiadora, na medida em que é preciso levar os alunos a pensarem a escrita de forma significativa na sociedade da qual fazem parte, considerando a multimodalidade dos gêneros textuais, assim como o engajamento dos indivíduos em diferentes comunidades de prática. Esse desafio fica ainda maior quando envolve o uso da tecnologia, já que não se pode excluí-la da sala de aula. O gênero roteiro de documentário é uma possibilidade de promover a produção de textos aliada ao uso da tecnologia. Assim, o trabalho a ser apresentado teve como foco compreender a repercussão da adoção do Projeto Didático de Gênero como metodologia ativa, no processo de ensino e aprendizagem dos alunos, no tocante ao desenvolvimento dos letramentos e à construção de sua identidade dentro das comunidades de prática em que atua, quando esse dispositivo de ensino possibilita a legitimação de comunidades de prática em sala de aula. Dessa forma, também reforça a importância do papel do professor de Língua Materna como mediador do desenvolvimento dos letramentos, por meio da interação, inclusive em meios digitais, em uma perspectiva socialmente inclusiva e crítica. Como base teórica, o estudo apresenta a concepção social de aprendizagem, o conceito de comunidades de prática a partir de Wenger (2001), os estudos de letramentos, de acordo com Street (2008, 2012), Barton & Lee (2015), Kleiman (1995, 2007, 2014), bem como o Projeto Didático de Gênero enquanto dispositivo de ensino (Guimarães e Kersch, 2014, 2015), que tem como pano de fundo o Interacionismo Sociodiscursivo de Bronckart (2009). Por meio da análise das produções realizadas ao longo do projeto, foi possível perceber a evolução dos alunos no que se refere ao domínio do gênero e aos diferentes letramentos. Tais avanços não foram desenvolvidos individualmente, mas sim de forma coletiva. Por isso, foi possível avaliar que esses estudantes constituíram comunidades de prática, entendidas aqui como fundamentais para a construção dos conhecimentos que estiverem em jogo. / Producing texts at school is a challenging task, since it is necessary to lead students to think about writing in a meaningful way in the society in which they are part of, considering the multimodalities of the text genres as well as people´s engagement in different communities of practice. This challenge becomes even greater when it involves the use of technology. After all, it cannot be excluded from the classroom. The documentary script genre is a possibility to promote the production of texts allied to technology use. Thus, the work to be presented focused on to understand the repercussion of the adoption of a Didactic Project with text genres, as an active methodology in the teaching and learning process of the students, regarding the development of literacy and the construction of their identity, when this teaching device enables the legitimation of communities of practice in the classroom. Thereby, it also reinforces the importance of mother tongue teacher´s role as mediator of the development of literacy through interaction, including digital media, in a social perspective. As theoretical basis, the study presents the social conception of learning, the concept of communities of practice from Wenger (2001), the literacy studies according to Street (2008, 2012), Barton & Lee (2015), Kleiman (1995, 2007,2014), as well as the Didactic Project of text genres as a teaching device (Guimarães and Kersch, 2014,2015), that has Bronckart's Sociodiscursive Interactionism (2009) as its background. Through the analysis of the productions carried out throughout the project, it was possible to perceive students´evolution with regard to the genre and the different literacies. Such advances were not developed individually but collectively. Therefore, it was possible to evaluate that these students constituted communities of practice, understood here as for the construction of knowledge that was at stake.

Submitted by Silvana Teresinha Dornelles Studzinski (sstudzinski) on 2015-10-21T11:56:06Z No. of bitstreams: 1 KELI RODRIGUES RABELLO_.pdf: 4906797 bytes, checksum: f7e8e3191a238a960a142467264ec2ce (MD5) / Made available in DSpace on 2015-10-21T11:56:06Z (GMT). No. of bitstreams: 1 KELI RODRIGUES RABELLO_.pdf: 4906797 bytes, checksum: f7e8e3191a238a960a142467264ec2ce (MD5) Previous issue date: 2015-06-17 / OBEDUC/CAPES - Observatório da Educação / A necessidade do contínuo desenvolvimento de metodologias de ensino de língua materna capazes de transformar as práticas de linguagem dos alunos e de promover as relações interdisciplinares de conhecimento, de acordo com o que preconizam os documentos oficiais como os PCNs e o OCEM, constituem, de forma geral, o contexto social no qual se originam as motivações para o desenvolvimento desta pesquisa. Sendo assim, o foco central da ação investigativa desta pesquisa está no processo de didatização de um gênero de texto (cuja prática social fomenta a interdisciplinaridade) que se dá, nesta pesquisa, por meio de um dispositivo de ensino chamado de Projetos Didáticos de Gênero (doravante, PDG) que viabiliza o ensino de língua através de gêneros de texto, desenvolvendo as capacidades de linguagem dos alunos. Já a demanda pela interdisciplinaridade conduz ao estudo do gênero de texto ‘artigo midiático de divulgação científica’ (doravante, artigo MDC). Assim, este trabalho apresenta a aplicação de um PDG com enfoque no gênero artigo MDC com vistas a desenvolver as capacidades de linguagem dos alunos e a propiciar a aprendizagem interdisciplinar. Os principais aportes teóricos que sustentam as ações desta pesquisa situam-se nos estudos do Interacionismo sociodiscursivo (ISD), de Bronckart (2009; 2012; 2013), além dos estudos sobre as capacidades de linguagem, realizados por Dolz e Schneuwly (2011) e Cristóvão e Stutz (2011; 2013), sobre as Sequências Didáticas, também de Dolz e Schneuwly (2011); sobre os Projetos de Letramento, de Kleiman (1995; 1999; 2000; 2007; 2008) e sobre a divulgação cientifica e midiática de Charaudeau (2008; 2009; 2010). O processo metodológico pelo qual se realiza esta investigação consiste na pesquisa-ação e compõe-se de ações que vão desde o planejamento do PDG e sua aplicação em sala de aula à elaboração da ferramenta de análise de dados. A elaboração do PDG resultou em um projeto interdisciplinar chamado de ‘Jovens cientistas’ aplicado a uma turma de 2º ano do ensino médio da rede pública estadual do município de Sapucaia do Sul-RS e contou com a colaboração da professora de Biologia, a fim de estabelecer a interdisciplinaridade. A análise dos dados obtidos indica que a didatização de um gênero como os artigos MDC, por meio de um dispositivo de ensino de língua como o PDG, pode de fato desenvolver as capacidades de linguagem dos alunos e contribuir para a construção do aprendizado interdisciplinar em sala de aula. / The need for the continued development of teaching methods of mother tongue able to transform students' language practices and promote interdisciplinary relations of knowledge, according to advocating official documents as the PCNs and OCEM, are so Overall, the social context in which originate the motivations for developing this research. Thus, the central focus of the investigative action of this research is on didactization process of a text genre (whose social practice fosters interdisciplinary) that occurs in this research using a teaching device called Genre Didactical Projects (henceforth GDP) that enables the language of instruction through text genres, developing the students' language skills. However, demand for interdisciplinarity leads to text genre study ‘Media Articles of Science Communication'. This work presents the application of a GDP focusing on gender Article MDC in order to develop students' language skills and to foster interdisciplinary learning. The main theoretical contributions that sustain the actions of this research are located in Socio-Discursive Interacionism studies (SDI) of Bronckart (2009; 2012; 2013), in addition to studies on language skills, conducted by Dolz and Schneuwly (2011) and Cristóvão; Stutz (2011; 2013), on Teaching sequences, also Dolz and Schneuwly (2011); on literacy projects, Kleiman (1995; 1999; 2000; 2007; 2008) and the scientific and media disclosure from Charaudeau (2008; 2009; 2010). The methodological process by which it accomplishes this research consists in action research and consists of actions ranging from planning the GDP and its application in the classroom to the development of data analysis tool. The preparation of the GDP resulted in an interdisciplinary project called 'Young scientists' applied to a class of 2nd year of high school in a public school in the city of Sapucaia do Sul and with the collaboration of a Biology teacher in order to establish interdisciplinary.The data analysis indicates that the didactization of a genre as the Media Articles of Science Communication, through a language teaching device as the PDG, can indeed develop students' language skills and contribute to the construction of interdisciplinary learning in the classroom of class.