Problems for P-Monge-Ampere Equations

2010 Mathematics Subject Classification: 35A23, 35B51, 35J96, 35P30, 47J20, 52A40.

On the Moving Boundary Hitting Probability for the Brownian Motion

2000 Mathematics Subject Classification: 60J65.

Solutions of Fractional Diffusion-Wave Equations in Terms of H-functions

MSC 2010: 35R11, 42A38, 26A33, 33E12

On Some Generalizations of Classical Integral Transforms

MSC 2010: 44A15, 44A20, 33C60

The analysis of bullwhip effect in a HMMS-type supply chain

The aim of the paper is to investigate the well-known bullwhip effect of supply chains. Control theoretic analysis of bullwhip effect is extensively analyzed in the literature with the Laplace transform. This paper tries to examine the effect for an extended Holt–Modigliani–Muth–Simon model. A two-stage supply chain (supplier–manufacturer) is studied with quadratic costs functional. It is assumed that both firms minimize the relevant costs. The order of the manufacturer is delayed with a known constant. Two cases are examined: supplier and manufacturer minimize the relevant costs decentralized, and a centralized decision rule. The question is answered, how to decrease the bullwhip effect.

The analysis of bullwhip effect in a HMMS-type supply chain

The aim of the paper is to investigate the well-known bullwhip effect of supply chains. Control theoretic analysis of bullwhip effect is extensively analyzed in the literature with Laplace transform. This paper tries to examine the effect for an extended Holt-Modigliani-Muth-Simon model. A two-stage supply chain (supplier-manufacturer) is studied with quadratic costs functional. It is assumed that both firms minimize the relevant costs. The order of the manufacturer is delayed with a known constant. Two cases are examined: supplier and manufacturer minimize the relevant costs decentralized, and a centralized decision rule. The question is answered, how to decrease the bullwhip effect.

Intenzitásalapú modellezés és a mértékcsere (Intensity-based modeling and thje change of measure)

A dolgozatban a hitelderivatívák intenzitásalapú modellezésének néhány kérdését vizsgáljuk meg. Megmutatjuk, hogy alkalmas mértékcserével nemcsak a duplán sztochasztikus folyamatok, hanem tetszőleges intenzitással rendelkező pontfolyamat esetén is kiszámolható az összetett kár- és csődfolyamat eloszlásának Laplace-transzformáltja. _____ The paper addresses questions concerning the use of intensity based modeling in the pricing of credit derivatives. As the specification of the distribution of the lossprocess is a non-trivial exercise, the well-know technique for this task utilizes the inversion of the Laplace-transform. A popular choice for the model is the class of doubly stochastic processes given that their Laplace-transforms can be determined easily. Unfortunately these processes lack several key features supported by the empirical observations, e.g. they cannot replicate the self-exciting nature of defaults. The aim of the paper is to show that by using an appropriate change of measure the Laplace-transform can be calculated not only for a doubly stochastic process, but for an arbitrary point process with intensity as well. To support the application of the technique, we investigate the e®ect of the change of measure on the stochastic nature of the underlying process.

Determinação da composição química de quatro variedades de feijão caupi (Vigna unguiculata L. Walp) cultivadas em solo potiguar

The cowpea (Vigna unguiculata L. Walp) is a major food crops in northeastern Brazil. In Rio Grande do Norte, the cowpea, vigna beans or cowpea, as it is known, has great socioeconomic importance as a source of nutrients in food, with great emphasis among agricultural products. To improve productivity and resistance to pests, two cultivars were developed exclusively by EMPARN (Agricultural Research Corporation of Rio Grande do Norte), for breeding. The samples were provided by EMPARN, two improved (Potiguar and Laugh year) and two landraces (Rib of beef and Canapu). The seeds were ground and made into flour samples and the determination of moisture and ash by graviméticos methods, lipids by Soxhlet extraction, fibers with determiner fiber, carbohydrates by difference and minerals by ICP-OES were performed except the match analyzed by UVvis. The results showed a high fiber content (55.55% and 55.32% and 50.04% improved samples and 50.32% creole samples) and protein (25.52% and 25.27% improved and 27 samples, 23% and 24.99% creole samples). Comparing the results of the mineral content, the improved cultivars stood out in relation to Ca, Co, P, Mg, Mo and Na. Creole cultivars showed better results for Cu, Cr (low), Fe, Mn, Ni, K and Zn. The results will be important in future nutritional research and to build a table of Brazilian chemical composition of foods.

Análise de desempenho de algoritmos de compressão de dados com perda para aplicações industriais

The great amount of data generated as the result of the automation and process supervision in industry implies in two problems: a big demand of storage in discs and the difficulty in streaming this data through a telecommunications link. The lossy data compression algorithms were born in the 90’s with the goal of solving these problems and, by consequence, industries started to use those algorithms in industrial supervision systems to compress data in real time. These algorithms were projected to eliminate redundant and undesired information in a efficient and simple way. However, those algorithms parameters must be set for each process variable, becoming impracticable to configure this parameters for each variable in case of systems that monitor thousands of them. In that context, this paper propose the algorithm Adaptive Swinging Door Trending that consists in a adaptation of the Swinging Door Trending, as this main parameters are adjusted dynamically by the analysis of the signal tendencies in real time. It’s also proposed a comparative analysis of performance in lossy data compression algorithms applied on time series process variables and dynamometer cards. The algorithms used to compare were the piecewise linear and the transforms.

Olimpíada de Língua Portuguesa: ressignificação de práticas de leitura e escrita

The search for new meanings in the basic education teaching-learning process has caused the development of public policies for mother language teaching, such as the Portuguese Language Olympics (OLP). To contribute to this search, this intervention project has as object of study reading and writing practices developed in the OLP through the educational model arising from literacy projects (TINOCO, 2008). In working towards, the general aim of reframing reading and writing practices through the PLO, developed from the teaching model that comes of literacy projects, we established three specific objectives: a) reflect on a national writing contest; b) to realign conceptual and methodological the Portuguese classes of the 7th grade school due to the developed project; c) to improve the reading and writing practices of the students in 7th grade of school where we operate. Therefore, we base ourselves in the history of Portuguese teaching in Brazil (SOARES, 2002; GERALDI, 2008), the dialogical conception of language (BAKHTIN, VOLOCHÍNOV [1929] 2009; SOARES, 1998; FARACO, 2009) in Literacy Studies (KLEIMAN, 2001, 2005, 2006; TINOCO, 2008; OLIVEIRA; TINOCO; SANTOS, 2011; STREET, 2014), the learning community concept (AFONSO, 2001), in studies of retextualization (OLIVEIRA, 2005; MARCUSCHI, 2010), gender discursive literary memories (CLARA; ALTENFELDER; ALMEIDA, 20--), in written evidence (POSSENTI, 2002) and Textual Linguistics (MARCUSCHI, 2008; ANTUNES, 2009; KOCH, 2011; SILVA [et. al.], 2013). Methodologically, this qualitative research (LÜDKE; ANDRÉ, 1986; ANDRÉ, 2005) is anchored in Applied Linguistics (MOITA LOPES, 1996). This research was supporting by students in the 7th grade, teachers, management team and parents, as well as people outside of school community. The instruments used for the generation of data were semi-structured interview, students‟ texts, audio recordings and video, photos, OLP material (teacher's book, a collection of texts and CD-ROM). The data generated allowed us to establish the following categories of analysis in relation to the texts produced: authorship, in formativeness, discursive progression, compositional structure, content, style, and language aspects. In addition, throughout the project, the collaborators have produced texts of various genres: oral interview and written request letter, legal, literary memories, oral and experience report. Also experienced a local award and participated in a national competition. They produced a video and a book with stories and student authorship of illustrations. The results achieved show that the literacy project developed also allowed macro changes: reading and writing practices, once considered strictly school studied, they were transformed into broader social practices, through which various literacy agents were able to collaboratively act. In short, they experienced writing practices that go beyond the classroom and the teacher-student relationship.

Implementação das diretrizes operacionais para a educação básica nas escolas do campo: embates e limitações do trabalho docente no Rio Grande do Norte

Considering the situation of neglect existing in Brazilian public education and, specially, in the process of rural schooling, this dissertation aims to analyze the process of implementation of the Operational Guidelines for Basic Education in Rural Schools (DOEBEC), regulatory framework of the national policy of rural education. On it, we analyze the conditions of teaching work in rural schools of Rio Grande do Norte (RN), in 2010. The sample of the survey has as reference the representativeness of the chosen universe in relation to the totality of rural schools belonging to the state of RN. To answer the goals of the research, we opted to present a critical analysis of the following points: 1) Implementation of the DOEBEC; 2) Conditions of teaching work and teaching training. The points or categories of research were chosen based in the determinations of the DOEBEC (Resolution CNE/CEB n. 01/2002). For the data collection in the referred schools, we opted for the realization of interviews with the teachers and managers of these teaching establishments, in 2010. It was also utilized, for the characterization of school attendance in rural schools of RN, in 2010, official statistical data available by the State Secretary of Education and Culture (SEEC/RN). The analysis of the statistical data and of the primary data collected in field research indicated that the conditions of teaching work are still an obstacle to the development of the educative work of the teacher in rural areas. According to interviews with the participants of the research, we realized that the DOEBEC, despite being sanctioned in 2002, were still dimly known and discussed by the interviewees of the referred schools in 2010. Thus, we propose that the implementation of the policy of rural education in RN, instituted by DOEBEC’s legal landmark, and reaffirmed by the Rio Grande do Norte’s Charter to Rural Education (Brazil, 2005), is rethought and reconsidered, in the sense of ensuring that the changes proposed in this legal text, inherent to the school functioning, to the conditions of teaching work, to the rural schools’ management, to the remuneration and valorization of teaching work, to the teaching training, to the conditions of school transport, among others, be turned into concrete actions to improve the quality of education offered in the rural schools of RN state.

Implementação das diretrizes operacionais para a educação básica nas escolas do campo: embates e limitações do trabalho docente no Rio Grande do Norte

Considering the situation of neglect existing in Brazilian public education and, specially, in the process of rural schooling, this dissertation aims to analyze the process of implementation of the Operational Guidelines for Basic Education in Rural Schools (DOEBEC), regulatory framework of the national policy of rural education. On it, we analyze the conditions of teaching work in rural schools of Rio Grande do Norte (RN), in 2010. The sample of the survey has as reference the representativeness of the chosen universe in relation to the totality of rural schools belonging to the state of RN. To answer the goals of the research, we opted to present a critical analysis of the following points: 1) Implementation of the DOEBEC; 2) Conditions of teaching work and teaching training. The points or categories of research were chosen based in the determinations of the DOEBEC (Resolution CNE/CEB n. 01/2002). For the data collection in the referred schools, we opted for the realization of interviews with the teachers and managers of these teaching establishments, in 2010. It was also utilized, for the characterization of school attendance in rural schools of RN, in 2010, official statistical data available by the State Secretary of Education and Culture (SEEC/RN). The analysis of the statistical data and of the primary data collected in field research indicated that the conditions of teaching work are still an obstacle to the development of the educative work of the teacher in rural areas. According to interviews with the participants of the research, we realized that the DOEBEC, despite being sanctioned in 2002, were still dimly known and discussed by the interviewees of the referred schools in 2010. Thus, we propose that the implementation of the policy of rural education in RN, instituted by DOEBEC’s legal landmark, and reaffirmed by the Rio Grande do Norte’s Charter to Rural Education (Brazil, 2005), is rethought and reconsidered, in the sense of ensuring that the changes proposed in this legal text, inherent to the school functioning, to the conditions of teaching work, to the rural schools’ management, to the remuneration and valorization of teaching work, to the teaching training, to the conditions of school transport, among others, be turned into concrete actions to improve the quality of education offered in the rural schools of RN state.

A política do argumento de inclusão regional no âmbito da Universidade Federal do Rio Grande do Norte

O acesso ao ensino superior gratuito no Brasil continua sendo um grande desafio para significativa parcela da população. Várias políticas de ações afirmativas têm sido estimuladas no sentido de promover um acesso mais homogêneo às universidades públicas brasileiras. Essa dificuldade no acesso acaba refletindo-se no mercado de trabalho, gerando um desequilíbrio em várias áreas de atuação. Na área de saúde, temos observado que um intenso debate sobre a oferta, a concentração e a fixação de médicos vem acontecendo no Brasil. Embora o número de médicos tenha aumentado nos últimos anos, chama a atenção a desigualdade da distribuição dos mesmos, que prioriza os grandes centros urbanos e as capitais em detrimento dos municípios do interior. A abertura de novos cursos de medicina é uma das estratégias na tentativa de conseguir uma melhor distribuição de médicos nas diversas regiões do Brasil. O presente trabalho teve como objetivo estudar o Argumento de Inclusão Regional da Universidade Federal do Rio Grande do Norte, enquanto política que objetiva priorizar a seleção de estudantes do interior do Estado com vistas a promover maior fixação futura de profissionais nas regiões com maior carência destes, especialmente médicos. Trata-se de estudo exploratório, descritivo, em que a coleta de dados constou de revisão bibliográfica e análise documental. O estudo se desenvolveu em etapas, transformadas em capítulos descritivos que deram forma ao trabalho final. É importante destacar a necessidade de esclarecimento sobre esse instrumento, que pode ser utilizado por todos os novos cursos de Medicina do país como um dos meios para um melhorar o acesso de estudantes das regiões onde os cursos estão inseridos e, com isso, tentar promover, ao final do curso, uma maior fixação de médicos nos municípios do interior do Brasil.

A DOCÊNCIA EM ADMINISTRAÇÃO E ALGUMAS CONTRIBUIÇÕES DE PROJETOS EDUCATIVOS

Esta dissertação apresenta dois projetos que apontam possibilidades de se construir novos conhecimentos com práticas viáveis e significativas para os alunos de Administração de Empresas do ensino superior. O objetivo é fomentar a discussão sobre o papel do docente e a formação dos professores no ensino superior com qualidade, através dos estudos em uma Faculdade da Zona Leste da cidade de São Paulo. Este trabalho aponta que o bacharelado em Administração pode ir para além de meros conteúdos técnicos a serem humanizados a partir da utilização de recursos didáticos inovadores. A análise dos projetos permite concluir que ações educativas diferenciadas, inspiradas na teoria freiriana, apresentaram-se como forma de enfrentamento às dificuldades nas relações entre ensino e aprendizagem. Com a aplicação dos referidos projetos, as possíveis dificuldades de aprendizagem foram transformadas em oportunidades, e hoje são contribuições à qualidade educativa.

Codificação compatível de vídeo 3D com o algoritmo HEVC

Esta dissertação apresenta um trabalho sobre codificação de vídeo 3D compatível com vídeo 2D. Tem por base o desenvolvimento de um método para melhorar, no descodificador, a reconstrução de uma vista subamostrada resultante de uma transmissão simulcast usando a norma de codificação de vídeo H.265 (informalmente denominada de High Efficiency Video Coding (HEVC)). Apesar de manter a compatibilidade com vídeo 2D a transmissão simulcast normalmente requer uma taxa de transmissão elevada. Na ausência de ferramentas de codificação 3D adequadas é possível reduzir a taxa de transmissão utilizando compressão assimétrica do vídeo, onde a vista base é codificada com a resolução espacial original, enquanto que a vista auxiliar é codificada com uma resolução espacial menor, sendo sobreamostrada no descodificador. O método desenvolvido visa melhorar a vista auxiliar sobreamostrada no descodificador utilizando informação dos detalhes da vista base, ou seja, as componentes de alta frequência. Este processo depende de transformadas Afim para realizar um mapeamento geométrico entre a informação de alta frequência da vista base de resolução completa e a vista auxiliar de menor resolução. Adicionalmente, de modo a manter a continuidade do conteúdo da imagem entre regiões, evitando artefatos de blocos, o mapeamento utiliza uma malha de triangulação da vista auxiliar aplicado à imagem de detalhes obtida a partir da vista base. A técnica proposta é comparada com um método de estimação de disparidade por correspondência de blocos, sendo que os resultados mostram que para algumas sequências a técnica desenvolvida melhora não só a qualidade objetiva (PSNR) até 2.2 dB, mas também a qualidade subjetiva, para a mesma taxa de compressão global.