• Energy Research
• Open Access close
• Closed Access close
• Open Source close
• Embargo close
• US close
• Spanish; Castilian close

"May 1997"--P. [4] of cover. ; Shipping list no.: 97-0353-P. ; Cover title. ; Mode of access: Internet.

El presente white paper presenta una estrategia integral para la conservación de la Amazonía mediante la diplomacia científica. Aborda la situación crítica de esta región vital, destacando su importancia ecológica y cultural. Este documento es el resultado de una metodología basada en dos procesos participativos, siendo el primero un ejercicio colaborativo dentro del Congreso de Investigación e Innovación en Sostenibilidad (SRI) y el segundo un grupo focal con expertos en diplomacia científica de América Latina, así como en el análisis de literatura. Como resultado, proponen una serie de recomendaciones prácticas y viables agrupadas en 4 categorías: 1) cooperación transdisciplinaria científica y académica, 2) el fortalecimiento de una plataforma de monitoreo conjunto, 3) la creación de un Science-Policy Hub y 4) el desarrollo de capacidades. A su vez, estas recomendaciones se categorizan en instrumentos de política pública: regulatorios (R), operacionales (O), financieros (F) y blandos (B). Un enfoque integral que combine investigación, conocimiento indígena y cooperación internacional se sugiere, junto con otras recomendaciones generales, para abordar de manera efectiva los retos ecológicos y sociales que enfrenta la Amazonía se enfatizan.

"780-022-b"--Colophon. ; Introduction to an upcoming conference. ; Cover title. ; Mode of access: Internet.

This works presents the design of wireless power transfer systems that can transfer power through materials such as stainless steel, aluminum, carbon fiber, and fiberglass. Wireless power transfer research has been limited to through-air applications, focusing on short distances and high efficiencies. However, complex scenarios require specific design criteria to provide the advantages of wireless power transfer for critical applications. Taking this into consideration, this work presents the extensive research towards enabling wireless power transfer systems for unconventional barriers. In the first chapter a new approach is taken towards the design of compact and embedded wireless power transfer solutions. A miniature coil is designed to transfer power through a 1 mm thick aluminum metal plate. The results are unprecedented, P_rx=100 mW, considering that through metal power transfer had only being demonstrated using large diameter coils. In addition to that, the metal barrier used is aluminum, a high conductivity material. This is important because traditional research focused on less conductive material such as stainless steel or tin. In the next chapter, we demonstrated a wireless power and data transfer system that uses a miniature coil with a size of 15 mm × 13 mm × 6 mm. Our system demonstrated that not only power but data could be transferred through an aluminum barrier using the same coil for power and data transmission. The maximum coil-to-coil power transfer efficiency is 2.4%, and the maximum harvested power is 440 mW operating at 2 kHz. Additionally, our system demonstrated that power can be harvested in variety of materials of different thicknesses. The next chapter presents a breakthrough in the field of wireless power transfer through metal by enabling long distance wireless power transfer. A large portion of the technologies for wireless power transfer are limited to short operation distances, distances around 1-10 millimeters to less than 20 cm. The operation distances are even shorter for the ...

Este artículo examina el proceso en que la agricultura itinerante está siendo marginada en la biosfera Río Plátano de la Mosquitia hondureña. Mientras la región se vincula cada vez más con la sociedad nacional de Honduras, varios procesos socioeconómicos están transformando las comunidadesde la reserva. Esta investigación se enfoca en tres comunidades ubicadas a lo largo del límite oriental de la biosfera. Pocas casas todavía están orientadas totalmente en la subsistencia. La mayoría combina la subsistencia con varias otras actividades que rinden el dinero. Este estudio demuestra que la sostenibilidad de la agricultura itinerante no es una cuestión solamente de sus límites ambientales, sino su valor en comparación a otras actividades económicas que existen ahora en la Mosquitia hondureña, así como en otras regiones fronteras de la América Central.Palabras claves: Mosquitia hondureña, río Plátano, sostenibilidad, agricultura itinerante, cambio socioeconómico.AbstractThis article examines the process in which shifting cultivation is becoming marginalized in the Río Plátano Biosphere of the Honduran Mosquitia. As the region becomes increasingly tied to the national society of Honduras, various socioeconomic processes are transforming communities in the reserve.This investigation focuses on three communities located along the eastern boundary of the biosphere.Few houses are still oriented solely on subsistence. The majority combine subsistence with various other money-making activities. This research demonstrates that the sustainability of shifting cultivation is not solely a question of its environmental limits, but also its value in comparison to other economic activities that are now present in the Honduran Mosquitia, as well as in other frontier regions of Central America.Keywords: Honduran Mosquitia, Río Plátano, sustainability, shifting cultivation, socioeconomic change

"June 1997"--P. [4] of cover. ; Shipping list no.: 97-0334-P. ; Cover title. ; Mode of access: Internet.