A key component for safety applications in Vehicular ad-hoc network (VANET) is the use of periodic beacon messages which provide vehicles with a real-time vehicle proximity map of their surroundings. Based on this map, safety applications can be used for accident prevention by informing drivers about evolving hazardous situations. In order to allow synchronized and cooperative reactions, the ta...

In this article, we first propose a reverse sector mechanism and an optimization division mechanism, which can provide enormous energy conservation benefits. Based on these mechanisms, an efficient sensory data collection mechanism over a cellular-WSN integrated network, named beacon routing algorithm, is proposed to spontaneously renew the local WSN topology according to the position of the UE...

Navigating without vision can be quite a daunting task. This study details an auditory interface to deal with this situation and then describes initial validation experiments. Ss were assigned to conditions with differing auditory beacons and assessed on how quickly and efficiently they were able to navigate through a series of virtual environments. The effect of beacon type was explored as wel...

GPS-Squitter is a system concept that merges the capabilities of Automatic Dependent Surveillance (ADS) and the Mode S beacon radar. The result is an ktegraurd concept for seamless surveillance and data link that permits equipped aimaft to participate in A D S or beacon ground envinwlments. This offers many possibilities for transition from beacon to ADS-based surveillance. This paper briefly d...

¾ IEEE 802.15.4/Zigbee standards → protocol stack for communications of low cost, low rate, and energy efficient wireless embedded devices ¾ 802.15.4 enables star topologies (a coordinator and a set of leaf nodes) ¾ Coordinator emits a periodical 'beacon' to keep leaf nodes synchronized. After every beacon, nodes can transmit for a certain time (superframe duration) with CSMA/CA. The rest of th...

--Security of the wireless sensor network is emerged as a crucial issue due its resource-constrained nature. Number of localization techniques suffers from security threats when there are compromised beacon nodes in the network. This paper presents a technique for detection and revocation of compromised beacon nodes using the concept of Intelligent Water Drop algorithm. The results are very pro...

A methylene-blue (MB)-labeled molecular beacon junction probe allows for a signal-on electrochemical detection of nucleic acids via target recycling using endonucleases. Electron transfer is reduced when the MB is intercalated in the stem of the molecular beacon, but then electron transfer from MB to a gold electrode is enhanced upon cleavage of the junction probe due to increased probability o...

A functional description of a communications satellite beacon receiver is presented. The system, designed primarily for LES-5/6, is capable of reliable unattended operation, and provides a frequency and time reference for fixed and highly mobile satellite communications terminals. Theoretical and experimental data are given, with particular emphasis on automatic acquisition and tracking of the ...

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 ...

Singe-beacon localization technology can help Autonomous Underwater Vehicles (AUVs) to obtain precise positions by deploying only one beacon. It is considered as a promising way, benefiting from saving much time and labor compared with traditional Long-Baseline Localization (LBL). A typical single-beacon scheme contains two essential questions: the initial observability problem long-endurance t...