Inventania: interfaces tecnológicas em invenções poéticas

Pós-graduação em Artes - IA

Novas missões e novas tecnologias: o papel do governo federal e a criação da DARPA na construção da estratégia de supremacia em ciência e tecnologia e defesa dos Estados Unidos na Guerra Fria

Pós-graduação em Relações Internacionais (UNESP - UNICAMP - PUC-SP) - FFC

Inclusão escolar, necessidades educacionais especiais e ensino de ciências: alguns apontamentos

We can notice in the different sectors of the society a significant increase of individuals that possess some type of deficiency. Although there is an increasing process of inclusion, we find, even in Educational Institutions, barriers and limited conceptions on this subject. Thus, aiming at clarifying some questions related to this subject, we present some debates found in the literature about the Inclusive Education, Special Education and the construction of inclusive education strategies.

Study of cutting forces on machinability properties of gray cast iron using new ceramics cutting tools

During gray cast iron cutting, the great rate of mechanical energy from cutting forces is converted into heat. Considerable heat is generated, principally in three areas: the shear zone, rake face and at the clearance side of the cutting edge. Excessive heat will cause undesirable high temperature in the tool which leads to softening of the tool and its accelerated wear and breakage. Nowadays the advanced ceramics are widely used in cutting tools. In this paper a composition special of Si3N4 was sintering, characterized, cut and ground to make SNGN120408 and applyed in machining gray cast iron with hardness equal 205 HB in dry cutting conditions by using digital controlled computer lathe. The tool performance was analysed in function of cutting forces, flank wear, temperature and roughness. Therefore metal removing process is carried out for three different cutting speeds (300 m/min, 600 m/min, and 800 m/min), while a cutting depth of 1 mm and a feed rate of 0.33 mm/rev are kept constant. As a result of the experiments, the lowest main cutting force, which depends on cutting speed, is obtained as 264 N at 600 m/min while the highest main cutting force is recorded as 294 N at 300 m/min.

Mapping of adhesion forces on soil minerals in air and water by atomic force spectroscopy (AFS)

The adhesion force between an atomic force microscope (AFM) tip and sample surfaces, mica and quartz substrates, was measured in air and water. The force curves show that the adhesion has a strong dependence on both the surface roughness and the environmental conditions surrounding the sample. The variability of the adhesion force was examined in a series of measurements taken at the same point, as well as at different places on the sample surface. The adhesion maps obtained from the distribution of the measured forces indicated regions contaminated by either organic compounds or adsorbed water. Using simple mathematical expressions we could quantitatively predict the adhesion force behavior in both air and water. The experimental results are in good agreement with theoretical calculations, where the adhesion forces in air and water were mostly associated with capillary and van der Waals forces, respectively. A small long-range repulsive force is also observed in water due to the overlapping electrical double-layers formed on both the tip and sample surfaces.

The Development of Science Education Research in Brazil and Contributions from the History and Philosophy of Science

Over the last 50 years a new research area, science education research, has arisen and undergone singular development worldwide. In the specific case of Brazil, research in science education first appeared systematically 40 years ago, as a consequence of an overall renovation in the field of science education. This evolution was also related to the political events taking place in the country. We will use the theoretical work of Rene Kaes on the development of groups and institutions as a basis for our discussion of the most important aspects that have helped the area of science education research develop into an institution and kept it operating as such. The growth of this area of research can be divided into three phases: The first was related to its beginning and early configurations; the second consisted of a process of consolidation of this institution; and the third consists of more recent developments, characterised by a multiplicity of research lines and corresponding challenges to be faced. In particular, we will analyse the special contributions to this study gleaned from the field known as the history and philosophy of science.

Theoretical Models for Surface Forces and Adhesion and Their Measurement Using Atomic Force Microscopy

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

Aplicação de redes neurais artificiais na predição de diâmetro e rugosidade durante o processo de furação

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

As forças de operações especiais dos Estados Unidos e a intervenção no Afeganistão: um novo modo de guerra americano?

Pós-graduação em Relações Internacionais (UNESP - UNICAMP - PUC-SP) - FFC

Crime, ordem e violência em São Paulo: a percepção do nível de violência urbana no município de Assis

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Born-Infeld electrodynamics in very special relativity

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

A coupling technique for non-matching finite element meshes

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

The influence of handrim design on the contact forces on hands'surface: a preliminary study

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Segurança na América do Sul: uma abordagem histórico-conceitual

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)