This paper studies the use of wireless Ethernet (Wi-Fi) as a localization sensor for mobile robots. Wi-Fi-based localization relies on the existence of one or more Wi-Fi devices in the environment to act as beacons, and uses signal strength information from those beacons to localize the robot. Through the experiments described in this paper, we explore the general properties of Wi-Fi in indoor ...

Address: 1President, World Psychiatry Association, Mount Sinai School of Medicine, NYU, 5th Avenue & 100th Street, Box 1091 New York, New York 10029-6574, USA, 2Department of Psychiatry and Psychotherapy, University Hospital Dresden, Fetscherstrasse 74, D-01307 Dresden Germany and 3Parkkrankenhaus Leipzig-Südost, Klinik für Psychiatrie, Morawitzstrasse 2, D-04289 Leipzig, Germany * Correspondin...

A seamless location measuring system with WiFi beacon utilized and GPS receiver based systems in both of indoor and outdoor location measurements is proposed. Through the experiments in both of indoor and outdoor, it is found that location measurement accuracy is around 2-3 meters for the locations which are designated in both of indoor and outdoor. Keywords—GPS receiver; WiFi beacon; seamless ...

Wireless networks are commonly used by people. Market devices are equipped with the new security standard 802.11i. The standard announced in the middle of 2004 is commonly used to protect WLANs. Currently we can find the information that vulnerabilities were found in that standard. Then a question arises: Are WLANs compromised again? The article describes vulnerabilities which were discovered i...

Background

The Optical Wireless Communications (OWC) systems are attractive to provide broadband services due to their inherent wide bandwidth, easy deployment and no license requirement. The idea to employ the atmosphere as transmission media arises from the invention of the laser Li-Fi or optical Wi-Fi would be the best optimum solution over Wi-Fi technology, Li-Fi technology was first described and fin...