We present a method to optimize the orientation of directional sensors and instruments in a vehicle body-fixed frame. This technique can be used in spacecraft design to maximize the performance of directional sensors and instruments. The optimization formulation consists of using the attitude sphere to create directions over which to optimize and deriving an objective function that uses these d...

Quality is an important aspect of data discovery in the Semantic Sensor Web. This work extends current endeavors to make the Sensor Web more semantic by introducing an ontology design pattern which facilitates the modeling of aspects of spatial data quality. The implementation of a software program over two scenarios demonstrates the usefulness of the ontology design pattern for the Semantic Se...

Even though the technology has improved and become cheaper the actual acquisition can be expensive due to the very nature of ATR scenarios leading to a lack of readily available data. The need for an easier method of obtaining data for use in testing ATR systems is evident and the obvious way forward is to design software that mimics the sensors to give an accurate simulation of real data. This...

Compare with traditional way of numerical simulation by establishing the mathematical model through geometry optic, we design a TracePro model to analyze the sensing process of reflective intensitymodulated fiber optic sensor base on ray tracing. This type of sensor has advantages over other fiber optic sensor, including simple structure, flexible design, reliable perform, low cost etc. In this...

extensive researches on wireless sensor networks (wsns) have been performed and many techniques have been developed for the data link (mac) layer. most of them assume single-channel mac protocols. in the usual dense deployment of the sensor networks, single-channel mac protocols may be deficient because of radio collisions and limited bandwidth. hence, using multiple channels can significantly ...