with the rapid growth of indoor wireless communication systems, the need to accurately model radio wave propagation inside the building environments has increased. many site-specific methods have been proposed for modeling indoor radio channels. among these methods, the ray tracing algorithm and the finite-difference time domain (fdtd) method are the most popular ones. the ray tracing approach ...

BACKGROUND It is not clear which educational strategy is most effective in helping patients to change their lifestyles. This study compared the efficacy of two different educational models on reducing blood pressure (BP). METHODS This was a randomized controlled trial in ambulatory hypertensive patients >65 years of age. Workshops that aimed to develop self-management and patient empowerment ...

[1] We present concentration distributions of C1-C4 alkyl nitrates observed during the NASA airborne campaigns Pacific Exploratory Mission (PEM) -Tropics A (September– October 1996) and PEM-Tropics B (March–April 1999). The total geographic range for PEM-Tropics A was 45 N–72 S latitude and 153 E–75 W longitude, and for PEMTropics B was 40 N–36 S latitude and 149 E–75 W longitude. The maximum a...

Among a number of alternative energy sources, hydrogen is treated as one of the most promising candidates, due to the reason that it can be applied to a fuel cell as an input to provide electricity through an electrochemical reaction. On top of that, high conversion efficiency up to 40 to 60% is seen in a fuel cell. The first application of a Proton Exchange Membrane (PEM) fuel cell was as an a...

Com base em um movimento diacrônico de pesquisas e experiências formativas, este artigo apresenta texto natureza reflexiva interpretativa sobre ações formação indícios decorrentes delas que permitem compreender o papel do trabalho com tarefas matemáticas na/para a Professores Ensinam Matemática (PEM). Nesse movimento, são sublinhadas três contextos formativos PEM, alicerçadas no matemáticas: re...