Use of high energy ball milling on the sintering optimization of alumina ceramics

In this work, the effect of the milling time on the densification of the alumina ceramics with or without 5wt.%Y 2O 3, is evaluated, using high-energy ball milling. The milling was performed with different times of 0, 2, 5 or 10 hours. All powders, milled at different times, were characterized by X-Ray Diffraction presenting a reduction of the crystalline degree and crystallite size as function of the milling time increasing. The powders were compacted by cold uniaxial pressing and sintered at 1550°C-60min. Green density of the compacts presented an increasing as function of the milling time and sintered samples presented evolution on the densification as function of the reduction of the crystallite size of the milled powders. © (2010) Trans Tech Publications.

Educative games and expositive lesson: Comparison of educational techniques on sitting posture

Introduction: Studies on education in health are important for the concretion of action of promotion of the health. Objective: To verify the changes of theoretical knowledge on sitting posture, evaluated at two moments (initial and final,) considering two programs of education (expositive lesson and operative groups). Methods: 75 pupils had been citizens, of both the sexes, three 4as series of a public school, evaluated previously (A1) on seated position; group 1 was submitted to a procedure of expositive education, the 2 educative games in the 2 and, the 3 to no intervention. After one week they had been reevaluated (A2). For the moments the test of Wilcoxon was applied and between the Kruskal groups Wallis. Results: In the comparison inside of the groups, of 2 and 3 they had presented increase in the number of rightness on position seated in the after-test, with statistical significant difference, whereas in the group has controlled, such fact did not occur. In the comparison between groups, at the first moment (A1), 2 groups e 3 had not presented significant difference statistical (p > 0,05), however, in as moment notices that it had difference statistics between the three groups (p < 0,01), being that the G3 presented minor frequency of errors (md = 5) in relation to the g2 (md = 8) and g1 (md = 10). Conclusions: It can be affirmed that educative techniques that supply information and promote debates and exchanges of experiences between the participants increase the possibilities of incorporation of the contents related to the sitting posture.

Effect of ball milling on structural and physicochemical characteristics of cassava and Peruvian carrot starches

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Some dynamical properties of a classical dissipative bouncing ball model with two nonlinearities

Some dynamical properties for a bouncing ball model are studied. We show that when dissipation is introduced the structure of the phase space is changed and attractors appear. Increasing the amount of dissipation, the edges of the basins of attraction of an attracting fixed point touch the chaotic attractor. Consequently the chaotic attractor and its basin of attraction are destroyed given place to a transient described by a power law with exponent -2. The parameter-space is also studied and we show that it presents a rich structure with infinite self-similar structures of shrimp-shape. © 2013 Elsevier B.V. All rights reserved.

Identificação dos ângulos do tornozelo do membro de suporte, distância entre o pé de apoio e a bola e velocidade de saída da bola em cobranças de pênalti no futebol

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Tormentas e inimigos: relações dialógicas entre a literatura de fantasia e os role playing games

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo de um depósito de argila ball clay de Tambaú (SP), para aplicação na indústria cerâmica de revestimentos

Pós-graduação em Geologia Regional - IGCE

Diversão, rivalidade e política: o Re x Pa nos festivais futebolísticos em Belém do Pará (1905- 1950)

Estudar futebol nos proporciona compreender os embates e as construções culturais entre os diferentes sujeitos na sociedade. Dessa forma, o presente trabalho tem por objetivo analisar esse mundo no seu processo de passagem de um esporte mais aristocrático para a sua popularização através dos festivais futebolísticos na cidade de Belém do Pará durante os anos de 1905 a 1950. Festivais que foram muito mais do que diversão, pois, englobam uma série de segmentos sociais com sentimentos, paixões, lutas políticas que através dos seus interesses entram em conflitos que muitas vezes podem ser percebidos nos jogos suburbanos, nas suas respectivas festas e nos jogos entre Remo e Paysandú.

Games contando histórias: uma discussão sobre a narrativa nos JRPGs

Pós-graduação em Letras - IBILCE

The rolling ball problem on the plane revisited

By a sequence of rollings without slipping or twisting along segments of a straight line of the plane, a spherical ball of unit radius has to be transferred from an initial state to an arbitrary final state taking into account the orientation of the ball. We provide a new proof that with at most 3 moves, we can go from a given initial state to an arbitrary final state. The first proof of this result is due to Hammersley ( 1983). His proof is more algebraic than ours which is more geometric. We also showed that generically no one of the three moves, in any elimination of the spin discrepancy, may have length equal to an integral multiple of 2 pi.

A theoretical characterization of scaling properties in a bouncing ball system

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Practising Arithmetic Using Educational Video Games with an Interpersonal Computer

Studies show the positive effects that video games can have on student performance and attitude towards learning. In the past few years, strategies have been generated to optimize the use of technological resources with the aim of facilitating widespread adoption of technology in the classroom. Given its low acquisition and maintenance costs, the interpersonal computer allows individual interaction and simultaneous learning with large groups of students. The purpose of this work was to compare arithmetical knowledge acquired by third-grade students through the use of game-based activities and non-game-based activities using an interpersonal computer, with knowledge acquired through the use of traditional paper-and-pencil activities, and to analyze their impact in various socio-cultural contexts. To do this, a quasi-experimental study was conducted with 271 students in three different countries (Brazil, Chile, and Costa Rica), in both rural and urban schools. A set of educational games for practising arithmetic was developed and tested in six schools within these three countries. Results show that there were no significant differences (ANCOVA) in the learning acquired from game-based vs. non-game-based activities. However, both showed a significant difference when compared with the traditional method. Additionally, both groups using the interpersonal computer showed higher levels of student interest than the traditional method group, and these technological methods were seen to be especially effective in increasing learning among weaker students.

Artemídia preferente: fenômeno jogar & ler nas histórias em quadrinhos interativas (HQI) com os games de RPG

This artistic-scientific process aims to innovate the concept of Interactive Comics by adding them into the concept of RPG games and Single-Adventures. To make it properly done, there will be some issues about Interactivity, history of the Comic Strip and Mangas, and their techniques of use. Also, there will be other issues involving Electronic Comics and Interactive Comics, in addition to the concept of the RPG games and Single-Adventures, so that the reader of this paper could understand the practical result of every issue combined into one. The identification of these issues is made from a bibliographic and iconographic research, and it will also be displayed throughout the content. Some decisions will be thrown along this paper for the reader to decide and, therefore, understand the Interactivity process in a better way. The combined issues’ result will be presented in my interactive website, http://a3studios.com.br/iss/home (address not final) or http://amstarproductions.net (final address), where the readers will have to experience the “Play&Read” phenomenon. Furthermore, this work is inserted in the line of the research Artistic Processes and Procedures of the Department of Fine Arts from the Art Institute of UNESP, whose methodology used was the Freinet Educational Cybernetics, developed in the research group Media Arts and Videoclip leaded by the leading advisor for this Final Course Work. The result and discussion of artistic and scientific research were reported in monographs such as this that I present, with the following versions: PDF version for dissemination in the virtual repository of the Institute of Arts’ Library; hardcover version for physical collection at the Library of Institute of Arts; The Printed Version for the board of examiners; and an appropriated template version for submission to International Scientific Congress in the area of Arts.

101 Games inesquecíveis de Super Nintendo

Não disponível

Instrumentação eletrônica para experimentação do modelo Bouncer Ball dissipativo

In our experiments, we studied the classical dynamic of a particle in vertical motion subject to a constant gravitational field and the partial shock with an elastic wall with oscillatory motion located below the particle. The motion of the particle was confined to the vertical direction by a glass guide tube, which was initially evacuated, allowing viscous drag forces to be disregarded. The time between impacts, as well as the time between the reference phase of the movement of the base and the moment of impact and the period of oscillation of the base will be acquired by a hardware and software to obtain the phases space to be compared later with the description of the system through mapping discrete variables via the 'particle velocity immediately after shock 'and' phase of the movement of the base at the instant of shock 'obtained by computer simulation. This requires developing an electronic analog system followed by Digital implemented in reconfigurable logic, more specifically a sequential machine able to discriminate the impact with the metal base from the impacts of the glass guide tube, based on the frequency spectrum of the response of the microphone to these different impacts