Viabilidade do Código MCNPX para o Estudo da Técnica de Fluorescência de Raios-X por Reflexão Total

The X-ray fluorescence analysis (XRF) is an important technique for the qualitative and quantitative determination of chemical components in a sample. It is based on measurement of the intensity of the emitted characteristic radiation by the elements of the sample, after being properly excited. One of the modalities of this technique is the total reflection x-ray fluorescence (TXRF). In TXRF, the angle of refraction of the incident beam tends to zero and the refracted beam is tangent to the sample-support interface. Thus, there is a minimum angle of incidence that there is no refracted beam and all the incident radiation undergoes total reflection. As it is implemented in very small samples, in a film format, self-absorption effects should not very relevant. In this study, we evaluated the feasibility of using code MCNPX (Monte Carlo N - Particle eXtended), to simulate a measure implemented by the TXRF technique. In this way, it was verified the quality of response of a system by TXRF spectroscopy using synchrotron radiation as excitation beam for a simple setup, by retrieving the characteristic energies and the concentrations of the elements in the sample. The steps of data processing, after obtaining the excitation spectra, were the same as in a real experiment and included the obtaining of the sensitivity curve for the simulated system. The agreement between the theoretical and simulated values of Ka characteristic energies for different elements was lower than 1 % .The obtained concentration of the elements of the sample had high relatively errors ( between 6 and 60 % ) due mainly to lack of knowing about some realistic physical parameters of the sample , such as density . In this way, this result does not preclude the use of MCNPX code for this type of application

Narrativa e encenação: um estudo sobre diálogos e monólogos em contos de Marcelino Freire

Pós-graduação em Letras - FCLAS

Melhora da aptidão neuromuscular em indivíduos não treinados em força realizando método das séries simples e múltiplas

The purpose of this study was to evaluate the performance of individuals not trained in methods under performing resistance exercise in the method of multiple series and the following exercises: Leg press (LP) 45, leg extension (CE), leg curl (CF), front handle (PF), rowing neutral (RN), bench press (SR) and Peck deck (PD) in 9 weeks with three training sessions / week. The study was with of 6 individuals aged 40 to 55 years were divided into two groups all were tested using the 1 RM for securing cargo to the drills being performed each test 48 h. Results: According to what was observed using this training protocol with different volume in each group for 9 weeks of training in these subjects did not differ in both groups but showed increases above two devices with other evaluated Peck deck and this is due Leg Press major muscle group.

Os limites e as possibilidades de uma sequência didática: o conceito de proporcionalidade e a aprendizagem de alunos do 5º ano do Ensino Fundamental

This study aimed to analyze the limits and possibilities of a didactic sequence, addressing the concept of proportionality in the learning of students in 5th year of elementary school. From the results of the Diagnostic Assessment Initial applied to students in a class of 5th grade of elementary school, we selected eight (8) students who participated in the constituent activities of that instructional sequence. For the development of this sequence were used theoretical elements of Genetic Epistemology (Piaget, 1990), the theory of fields of Conceptual Vergnaud (1996) and the definition of instructional sequence proposed by Zabala (1998). Finally, after 20 days of application of these activities, we applied the Diagnostic Assessment Final aimed at investigating which concepts related to proportionality were built by the participating students. By analyzing the collected data, it can be concluded the following about the possibilities of teaching sequence: 1) students who, in Diagnostica Home Assessment used the multiplication algorithm, but also did not indicate the comparison between quantities are now performing; 2) students who, in the Diagnostic Assessment Initial, used the addition algorithm, now gradually are using the multiplication algorithm; 3)students who, in the Diagnostic Assessment Initial, could not solve problems involving the idea of proportionality, are now resolving, however, still use, in large part, the addition operation as a strategy for this proportional thinking. Now, in relation to the limits of the sequence noted: 1)time sufficient to propose a higher number of problem conditions to be carried by students who may have been a trigger of construction have not through the proportional multiplication;2)the distant proposition situations of assimilation schemes (interpretation) of the students, which may have caused certain imbalance in them, preventing them from thinking about the problem situation;3)the rapid passage of...

Alfabetização de jovens no 6º ao 9º ano na perspectiva freireana: uma intervenção educativa para a vida na escola e no mundo

By showing how the problem of illiteracy is present among adolescents 11-14 years of age, attending school regularly, and realize how much this problem affect your life not only in school but also in their participation in society, it has set the aim of this research to alphabetize and write the lyrics registered adolescents of elementary school (6th to 9th grade) in a public school, by the Paulo Freire alphabetization method. The type of research that best responds to the proposed objective was action research with a qualitative approach. The data obtained from this research were analyzed in three topics: the search and selection of generating words, technical literacy and consciousness of each generating words (encoding and decoding of the situation experienced this situation with critical weight, pragmatic), and in the end, the analysis of the production of genre personal letter. The survey results indicate that, indeed, it is possible to write the lyrics and literate adolescents with Freirean literacy method. Also indicate the need to continue this work with the subjects of this research to develop linguistic and discursive skills to dominate the genre studied, both in the phenomenon of literacy, as in the write the lyrics. The results also point to another need, which is the extension of this research work in the community and other schools of the city, who have this problem of having teenagers in Elementary Education II, without being literate, as an alternative to overcome this major problem of illiteracy

As avaliações externas e suas implicações para a organização do trabalho numa escola da rede estadual paulista: um estudo de caso

This research analyses the positives and/or negatives of external reviews to work's organization developed at the/and by the school. It should be noted that it's a qualitative case of empirical research, and it takes the pattern of case's study, because we held the investigation just in one school, which in turn, belongs to the education's public network by the state, and is located at the São Paulo northwest. The tools employed at this research for the data's collect were the observation, restricted to times of Pedagogical Work Activities Collective from the school, and the semi structured interviews with educational coordinators and the teachers too. We choose educational coordinators and teachers because they are closer with the education and learning methods, as well as their activities have more responsibility in relation to the main function developed by school, that is to teach, in other words, educational processes. This research also concerns an investigation about the educational coordinators and teachers conceptions, in relation to system's implantation external reviews at the schools. The results indicate to incidence of significant interference of the external reviews to/in the organization school's work, as, a teaching practice reorientation from results arising these reviews, or, modifications in the internal rating, since they have followed a tendency towards becoming more similar with their own external reviews. In what concerns the subjects investigated, we can emphasize that mostly submitted alienation with respect to negative effects of the external reviews for school. They showed that are conformed with the reality that they are inserted and in your mostly they proved perceive the positive effects by the implantation of external reviews. We can also add that the data obtained in the research allow us declare that the work of the educational coordinators of this school in presence of external reviews don't...

Implicações de um programa de formação continuada na formação e atuação de professores de educação física atuantes no ciclo I

This work focused on research a course of continuing education for teachers of Physical Education, offered in a city of São Paulo in 2013. Adopting as a benchmark analysis of models of continuing education in teaching, investigative question that guided this study was: what are the implications of this formative process in the formation and performance of the participating teachers?. With this guiding question, four were the objectives we seek to respond to this analysis: first identify the profile of teachers as well as the participation and involvement of the same course developed; 2 map and analyze the manifestations of teachers throughout the course; 3 reflect on the role of teachers in relation to approaches and/or distances with the common physical education curriculum proposed by the municipality; 4 identify and analyze the reflections on the course conducted. The methodological approach was qualitative and eighteen participants were teachers of a school system in a city of São Paulo, active in cycle I (1 to 5 years) of primary school. Data collection was carried out in two phases, with the participants in the first stage seventeen teachers and three teachers in the second stage that in addition to acting in the cycle I also actively participated in the course. Data were obtained in phase one using a diagnostic interview recorded on voice recorder and transcripts of observations and recorded in video and voice recorder from sixteen meetings of the continuing education course conducted in 2013 and phase two included the observation of classes teachers in the 2nd half of 2013, ending with a final interview. Demonstrations of physical education teachers in the course, as well as the situations observed and interviews indicated that on the profile of teachers are in the age range 30-58 years to serve at least five years in schools and most (10) does not work elsewhere. Another observation is that most of the participating teachers when thes...

A contação de histórias no ensino de ciências: um recurso didático

The present study aims to analyze the contribution of storytelling as a didactic resource in science education. The stories represents effective indicators to challenging situations as well as strengthen social, educational and emotional bonds. The research reported here allowed to present new ways to work the contents of Science Education, using the stories as interaction capabilities between content and affection. Keeping this in view, this work objectives was to observe the story telling as a resource for Science Education as well as identifying, analyze and to ponder which meanings assigned by teachers to this technique, their frequency of use and difficulties encountered in carrying out the activity. By the means of qualitative research, this study collected through interviews and by observations of practice in the classroom by their teachers from a municipal school in Pederneiras-SP. We concluded that the activities in the classroom, with the children propitiated them an interaction with the scientific content in a playful and pleasurable way, playing an important role in the formation of a critical and creative individual

Inflation in supergravity and the volume modulus

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

A geometric approach to cosmological boundary conditions

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Formação de professores no contexto das propostas pedagógicas de Rudolf Steiner (pedagogia Waldorf), Maria Montessori e da experiência da Escola da Ponte

Pós-graduação em Educação Matemática - IGCE

Aplicação de um método ergonômico em área de convívio em um campus universitário

The study presents the application of an ergonomic method based on graphical mesh, created to analyze the attributes of public open space and that influence on their usability. It was based on DePAN method, created to classify the service level offered by niches present in open relationship spaces. However, this method adopted Geographical Information System (GIS ) to make maps that represent the space attributes. This study proposed an adaptation of this method, which replaces GIS by AutoCAD software to generate maps . The goal is to test the feasibility and efficiency of producing maps in AutoCAD software to represent the service niches level. An relashionship area on a college campus for data collecting in graphical meshes and maps confection. By applying the graphical mesh the attributes of that space were evaluated to help promote people permanence on site. Although the process through AutoCAD seems to be harder by being mechanical it guarantees a satisfactory result for analysis, resembling images generated by GIS. Therefore, it is concluded that it’s possible to represent graphically the riches service level.

Síntese e caracterização de alvo de óxido de zinco dopado com alumínio

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

A influência de Georg Simmel no pensamento social de Ulrich Beck: pela compreensão do conflito no individualismo e nos processos de individualização

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)