Aiming at the problems that the traditional centroid algorithm in WSN node positioning precision is not high and the error is very large, this paper proposed a adaptive centroid algorithm based on weighted factor, first of all, determined the weighting factor according to the influence of different beacon node to the unknown node, with weights to reflect the impact of each beacon nodes for cent...

Hybridization of fluorescent molecular beacons provides real-time detection of RNA secondary structure with high specificity. We used molecular beacons to measure folding and unfolding rates of the Tetrahymena group I ribozyme under native conditions. A molecular beacon targeted against 15 nt in the 5' strand of the P3 helix specifically hybridized with misfolded forms of the ribozyme, without ...

A colored-noise Kalman filter is designed to diminish the error effects caused by sensors placed on vibrating structures. This paper deals with sensors that are used to estimate position, attitude or both. Here we focus on a vision-based system, which uses a set of lightemitting diode beacons with a focal plane detector to determine line-of-sight measurements. Estimation of both position and at...

In this paper satellite wave propagation at Ku and Ka band is considered. The design and simulation of a typical satellite beacon receiver at Ka band is designed and simulated for the future works. Also rain attenuation prediction at Ku band using satellite signal beacon measurement and simulations for Iran Telecommunication Research Center (ITRC) are presented. The measurement setup consists o...

IEEE 802.11 power saving mode (PSM) has been proposed in wireless LANs and multi-hop wireless networks to coordinate power states of wireless devices. In IEEE 802.11 PSM, power management decisions to wake up wireless devices or put them to sleep states are made periodically in every beacon interval. In this paper, we demonstrate via a rigorous, analytical model (the result of which is corrobor...

Efficient spatial navigation requires not only accurate spatial knowledge but also the selection of appropriate strategies. Using a novel paradigm that allowed us to distinguish between beacon, associative cue, and place strategies, we investigated the effects of cognitive aging on the selection and adoption of navigation strategies in humans. Participants were required to rejoin a previously l...

Accurate and secure localization is essential to the correct operation of many applications of sensor networks. However, existing methods lack concrete security mechanisms or are not resilient to beacon node compromise. We address the limitations of present approaches in this paper through the Secure Localization with Attack Tolerance (SLAT) protocol. In SLAT, non-beacon nodes estimate their po...

In Wireless Sensor Network (WSN), the IEEE 802.15.4 (Zigbee) protocol stack is a promising technology to attain minimum power transmission in the minimum-rate and short rangewireless Personal Area Network (PAN). The cluster tree topology of IEEE 802.15.4 consists of a PAN coordinator, cluster coordinator and numerous sensor devices. During a period of time, the PAN coordinator transmits the bea...

DOI: 10.1002/adfm.200901175 A conjugated polymer (CP) and molecular-beacon-based solid-state DNA sensing system is developed to achieve sensitive, label-free detection. A novel conjugated poly(oxadiazole) derivative exhibiting amine and thiol functional groups (POX-SH) is developed for unique chemical and photochemical stability and convenient solid-state on-chip DNA synthesis. POX-SH is solubl...

INTRODUCTION The Beacon Community Cooperative Agreement Program supports interventions, including care-delivery innovations, provider performance measurement and feedback initiatives, and tools for providers and consumers to enhance care. Using a learning health system framework, we examine the Beacon Communities' processes in building and strengthening health IT (HIT) infrastructures, specific...