The radiofrequency coil is a crucial component of the magnetic resonance imaging scanners, so that a solid knowledge on the design and physical characteristics is important for those interested in its development. A birdcage coil with a 10 cm radius…

This original article addresses the sexual and reproductive health needs of young people aged 15 to 24 in Latin America. It introduces five articles from original research projects in three countries: Argentina, Brazil, and Peru. These projects were funded by…

Educational Software is one of the pillars of distance learning and educational systems and has become the basic tool for current generations of students. However, recent methodologies used in this development have too many problems: a lack of common theoretical…

Denominado por Lee Shulman como el missing paradigm, el conocimiento didáctico del contenido (CDC o PCK, pedagogical content knowledge por sus siglas en inglés) ha experimentado en los últimos años un crecimiento vertiginoso como corriente de investigación didáctica. A pesar…

The general objective of present work has been the development and application of analytical methodologies based on the combination of UV spectra with chemometrics methods of experimental design for establishing the matrix of calibration and later analysis of the obtained…

Ecology, morphology, and phylogeny contribute to the organization of lizard assemblages; however, the number of lizard assemblages for which detailed knowledge of closely related sympatric species is available is limited. We studied the diet of 3 sympatric species of lizards…

A functional understanding of Newton's second law as a vector equation requires that students be able to reason about forces as vectors. In this paper, we present data describing students' conceptual difficulties with forces as vectors. These data suggest that…

A functional understanding of Newton's second law as a vector equation requires that students be able to reason about forces and acceleration as vectors. In this paper, we present data describing students' conceptual difficulties with vector quantities such as acceleration.…

Lexicon development and Part of Speech (POS) tagging are very important for almost all Natural Language Processing (NLP) applications. The rapid development of these resources and tools using machine learning techniques for less computerized languages requires appropriately tagged corpus. We…

“Peirce, Wittgenstein and Davidson: Anti-skeptic Coincidences”. This paper shows some similarities among Peirce’s, Wittgenstein’s and Davidson’s answers to skepticism. In each case, the response to Cartesian skepticism consist in pointing out the contradictory character of the skeptical doubt in itself.More…