Road safety is a very important issue in many jurisdictions. Road collisions, which have been identified as a major public health problem by the World Health Organization, are the 11th leading cause of global deaths.1 This problem is being addressed in North America through improved education, enforcement and engineering. Having access to better information systems and tools to support decision...

The purpose of this research is to develop a user-friendly Integrated GPS lab manual. This manual will help range engineers at NASA to integrate the use of GPS Simulators, GPS receivers, computers, MATLAB software, FUGAWI software and SATELLITE TOOL KTT software. The lab manual will be used in an effort to help NASA engineers predict GPS Coverage of planned operations and analyze GPS coverage o...

Despite the traffic increases at the World’s airports, little works have been done on methodologies to improve vehicles and airplanes ground control. This may be leading to reduced safety. Here an integrated system is developed to help guarantee suitable separations of land vehicles and airplanes moving on the airport ground area It can also addressed issues of the optimal use of taxi and runwa...

Urban forests are unique and highly valued resources. However, trees in urban forests are often under greater stress than those in rural or undeveloped areas due to soil compaction, restricted growing spaces, high temperatures, and exposure to air and water pollution. In addition, conditions change more quickly in urban as opposed to rural and undeveloped settings. Subsequently, proactive manag...

M-learning is an important role in e-learning environment by mobile device. However, in Taiwan junior high education, few research was to develop an m-learning system on the geography curriculum. Geography courses are quite indispensable. The sense of direction of training is one of the first studies in Taiwan junior high education of geography curriculum; however, many students’ sense of direc...

Global positioning systems (GPSs) and geographical information systems (GISs) have been widely used to collect and synthesize spatial data from a variety of sources. New advances in satellite imagery and remote sensing now permit scientists to access spatial data at several different resolutions. The Internet facilitates fast and easy data acquisition. In any one study, several different types ...

This paper quantifies the positioning accuracy of a new approach to indoor navigation, particularly with regard to errors in mutual clock synchronization and errors in knowledge of the locations of the reference stations. Two previous papers have described the overall system architecture and signaling format, and have developed analytical estimates of positioning accuracy in terms of transmitte...