Articles — IEEE (all)

When it comes to making a long-distance call, it's hard to top NASA's Deep Space Network. It’s the largest and most sensitive scientific telecommunications system in the world. so our objective is To archive knowledge of operations procedures. provide a capability to assist in execution monitoring; Provide a capability for automatically Constructing the plan to be executed and monitored. This paper describes the application area of DSN antenna operations, describes the plan to reduce the distance.

With the emergence of systems archiving and distribution of PACS medical imaging, also emerged the need to store those images off-site environment, this project aims to study this need, trying to offer a service within an information infrastructure that can integrate the environment site with a remote environment, a transparent and heterogeneous, taking account of the needs of users of teleradiology. Keywords: PACS, teleradiology, Medical Imaging, Archiving.

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En este trabajo se implementaron diferentes topologías de circuitos rectificadores, profundizando en el concepto de factor de potencia, evaluando el factor de potencia en las diferentes topologías utilizando ecuaciones matemáticas y simulaciones por software de computadora (TINA). Concluyendo que el circuito rectificador con uso del convertidor Boost, mejora la distorsión armónica total con respecto a las otras topologías evaluadas, siendo el aporte de la armónica fundamental mayor que las otras armónicas, obteniendo una corrección en el factor de potencia.

How to conceal objects from electromagnetic radiation has been a hot research topic. Radar is an object detection system that uses Radio waves to determine the range , angle, or velocity. A radar transmit radio waves or microwaves that reflect from any object in their path. A receive radar is typically the same system as transmit radar, receives and processes these reflected wave to determine properties of object. Different organizations are working onto hide object from the radar in outer space. Any confidential object can be taken through space without being detected by the enemies. This calls for necessity of devising new method to conceal an object electromagnetically.

Simultaneous information and energy transfer (SIET) is attracting much attention as an effective method to provide green energy supply for mobiles. However, low power level of harvested energy from RF spectrum limits application of this technique. Thanks to improvement of sensitivity and efficiency of RF energy harvesting circuit as well as dense deployment of small cell base stations, SIET becomes more practical. In this paper, we propose a unified receiver model for SIET in LTE-A small cell base station networks, formulate a feasibility problem with Poisson point process model and analyze the feasibility for a special and practical scenario. The results show that it is feasible for mobiles to charge the secondary battery with harvested energy from BSs, but it is still impractical to directly charge the primary battery or operate without any battery at all.