Using the underlying idea of the current-mode control, a new dynamical, sliding-mode control for the boost dc-dc converter is proposed. Such controller is easy to design, robust under load and input voltage variations, exhibits fast response, does not depend on…

This research looks at the efficiency and effectiveness of the United States Child
Welfare System. Specifically, it focuses on the lack of standardization in the system
as well as the relationship between the two main institutions involved in the
system—Child…

2010, Resumo simples.

Since its inception, the social sciences have tried to legitimate their scientific criteria so that the knowledge generated by social research is deemed valid and reliable. With this objective in mind, a series of techniques, norms, processes, rules and procedures…

Descripción completa.

En este ensayo se analiza el concepto de estudios sociales,
contrastándolo con la noción conceptual denominada didáctica de las
ciencias sociales; esto, con el fin de observar las particularidades de
cada categoría. Posteriormente, se plantea un esbozo de epistemología
aplicada…

Can children genuinely create new knowledge, as opposed to merely carrying out activities that resemble those of mature scientists and innovators? The answer is yes, provided the comparison is not to works of genius but to standards that prevail in…

The Knowledge Society Network (KSN) “takes advantage of new knowledge media to maximize and democratize society’s knowledge-creating capacity” (www.ikit.org/KSN). This article synthesizes the principles and designs of this network which were initiated over 15 years ago, and presents an exploratory…

Three classrooms of Grade 4 students from different schools and diverse backgrounds collaborated in early algebra research to solve a series of linear and quadratic generalizing problems. Results revealed that high- and low-achieving students were able to solve problems of…

Knowledge Building as a theoretical, pedagogical, and technological innovation focuses on the 21st century need to work creatively with knowledge. The team now advancing Knowledge Building spans multiple disciplines, sectors, and cultural contexts. Several teacher-researcher-government partnerships have formed to bring…