The barnacle photoreceptor sensitivity may either decrease (light adaptation) or increase (facilitation) after exposure to a conditioning light. The balance between adaptation and facilitation is influenced by at least three factors: initial sensitivity state of the cell, external calcium concentration, and conditioning intensity. Cells of very high sensitivity show mainly adaptation, which app...

background: the inappropriate use of handouts and notes is a common academic problem among students. students' notes are too brief and incomplete in compare with references; hence they may not cover the required content for the courses. the aim of this paper is to analyze students' attitude toward reading handouts and notes instead of references. methods: in this analytical and descri...

An investigation of students taking online classes exposed crucial student perceptions important to their selecting online/web-assisted courses. An exploratory factor analysis provided three factors of “convenience,” “enjoyment & independence,” and “no other option available” as motivations for students taking online/web-assisted courses. Positive correlations were identified linking the person...

The visibility of a target improves when the target is presented simultaneously or with a delay between two collinear flankers. Here we tested the temporal properties of lateral facilitation by manipulating the timing of both onsets and offsets of the target and flankers. The results show that lateral facilitation critically depends on the order of presentation of the target and flankers. A typ...