Although radix 10 based arithmetic has been gaining renewed importance over the last few years, decimal systems are not efficient enough and techniques are still under development. In this paper, an improvement of the CORDIC (coordinate rotation digital computer) method…

In the 19th century it was difficult for the growing number of medical practitioners in North America to access current medical literature. Various ways were suggested to solve this problem; one of them was the creation of physician-run medical library…

This study examines the relevance of environmental management as a source of competitive advantage for hotels. The relationship between the environmental proactivity of hotels located in the province of Alicante (Spain) and their economic performance levels was studied, and three…

A comparison between different emission rates of various pollutants obtained from various wastes is presented. The studied wastes were the following: polyethylene (PE), tyres, sewage sludges, polyvinyl chloride (PVC), cotton textiles, polyester textiles, meat and bone meals (MBMs), varnish wastes,…

Sediment samples from 25 sites in 17 rivers of the Pantanal (Brazil) were analyzed with the objective of evaluating pesticide contamination in sediments. Samples were extracted with an acetone, ethylacetate, and water mixture 2:2:1 (v/v/v). The extract was purified by…

El Embajador argentino ante la Santa Sede responde al artículo del Dr. Giovanni Armillota, propuesto como un complemento a su primer artículo sobre el sesquicentenario del inicio de las relaciones diplomáticas publicado en estas páginas, reivindicando y privilegiando una lectura…

El Dr. Giovanni Armillota en su artículo titulado "La Argentina y el Vaticano, desde la Independencia del País Andino al Pontificado de Juan Pablo II" abre un rico y estimulante diálogo con el Embajador argentino ante la Santa Sede, D.…

Despite increased numbers of female researchers, women still face more difficulties than their male counterparts when it comes to publishing their work and having it read and cited. In this editorial, the main recommendations are detailed in order to promote…

2007, Resumo apresentado no XI CBFV, Gramado, 2007.

In recent years, holographic optical elements have been introduced in different applications such as high-density data storage, interconnections, spatial and temporal filters and three-dimensional displays. Simultaneously, more sensitive, efficient and durable holographic materials have been developed. Thus it is necessary…