O ENSINO DA GEOMORFOLOGIA NAS ESCOLAS: REFLEXÕES A PARTIR DA ANÁLISE DO LIVRO DIDÁTICO DE GEOGRAFIA

O trabalho discute sobre a importância do livro didático para o ensino da Geomorfologia na escola básica. No primeiro momento é ressaltada a importância do livro no ensino escolar, sendo um recurso de construção do conhecimento geográfico e geomorfológico. No segundo momento é feita a análise do livro didático “Geografia: o espaço natural e a ação humana” referente ao capítulo que aborda os conhecimentos geomorfológicos, para verificar a relação entre o conhecimento escolar e científico

Projectile breakup dynamics for 6^{6}Li + 59^{59}Co: kinematical analysis of α\alpha-dd coincidences

A study of the kinematics of the $\alpha$-$d$ coincidences in the $^{6}$Li + $^{59}$Co system at a bombarding energy of $E_{lab} = 29.6$ MeV is presented. With exclusive measurements performed over different angular intervals it is possible to identify the respective contributions of the sequential projectile breakup and direct projectile breakup components. A careful analysis using a semiclassical approach of these processes provides information on both their lifetime and their distance of occurrence with respect to the target. Breakup to the low-lying (near-threshold) continuum is delayed, and happens at large internuclear distances. This suggests that the influence of the projectile breakup on the complete fusion process can be related essentially to direct breakup to the $^6$Li high-lying continuum spectrum. %Comment: Revised version including new Fig.3 and Fig.4 with new CDCC calculations. Accepted for publication at Eur. Phys. Jour. A. 11 pages, 6 figure

Degradability of Epoxy/Sisal Fiber Composites via Simulated Soil

The increase in the disposal of new polymeric materials is growing considerably in recent years, causing a major environmental impact. In view of this factor, many researchers have been studying and producing biodegradable composites whose shorter time to degradation reduces the volume of waste in landfills. Reinforcements made from natural fibers, especially sisal, has been much used in these new composites due to their low density, because they are derived from renewable source, are not toxic and their low cost compared to synthetic fibers. In view of this need, this study evaluated an epoxy/sisal composite via TGA (Thermogravimetric Analysis), DSC (Differential Scanning Calorimetry), the impact resistance and the mass variation evaluation before and after exposure in simulated soil for a period of 8 weeks