A pesquisa, no âmbito do Mestrado em Agriculturas Familiares e Desenvolvimento sustentavel - MAFDS/UFPA, da qual nos referimos tem sua origem no dispositivo denominado PD (Pesquisa - Desenvolvimento), o qual foi articulado ao dispositivo PF (Pesquisa-Formacao), enquadrados como arranjo PFD (Pesquisa-Formacao-Desenvolvimento) destinado a formacao de profissionais que possam contribuir para o fortalecimento da agricultura familiar em nivel de Estado do Para. O trabalho tem como objetivo analisar a influencia da pesquisa - durante a formacao - na pratica profissional dos egressos do MAFDS/UFPA. Os resultados da pesquisa conduzem ao entendimento de que essa influencia e exercida independentemente do locus de atuacao profissional dos egressos ao contribuir na mudanca de postura a partir do desenvolvimento de competencias e habilidades necessarias ao desenvolvimento da agricultura familiar.

Research has shown that students have tremendous difficulties developing a qualitative understanding of wave optics, at all educational levels. In this study, we investigate how three different approaches to visualizing light waves affect students’ understanding of wave optics. In the first, the conventional, approach light waves are represented by sinusoidal curves. The second teaching approach includes representing light waves by a series of static images, showing the oscillating electric field vectors at characteristic, subsequent instants of time. Within the third approach phasors are used for visualizing light waves. A total of N=85 secondary school students were randomly assigned to one of the three teaching approaches, each of which lasted a period of four class hours. Students who learned with phasors and students who learned from the series of static images outperformed the students learning according to the conventional approach, i.e., they showed a much better understanding of basic wave optics, as measured by a conceptual survey administered to the students one week after the treatment. Our results suggest that visualizing light waves with phasors or oscillating electric field vectors is a promising approach to developing a deeper understanding of wave optics for students enrolled in conceptual level physics courses. (IPN/Orig.)