The Linearized Auto-Localization (LAL) algorithm estimates the position of beacon nodes in Local Positioning Systems (LPSs), using only the distance measurements to a mobile node whose position is also unknown. The LAL algorithm calculates the inter-beacon distances, used for the estimation of the beacons' positions, from the linearized trilateration equations. In this paper we propose a method...

Determining the physical location of sensor nodes is the most basic requirement in most Wireless Sensor Networks (WSN) application. Wireless sensor network nodes’ self-localization techniques are discussed and studied in this paper. At first, the organization structure of wireless sensor network, the classify of node location algorithmic and node location computing method are introduced, the si...

Localization is a fundamental problem in wireless sensor networks. Many approaches, including range-based and range-free techniques, have been proposed to determine the optimal location for sensor nodes. This paper presents a simple range-free localization scheme that is based on received signal strength indicator (RSSI) geometric localization for wireless sensor networks. The node locations ar...

To reveal nucleic acid localization in mitochondria, we designed molecular beacon fluorescent probes against: i) the light strand complementary to ND5 mitochondrial DNA (mtDNA) gene (annealing also to corresponding mRNA); ii) displacement (D) loop 7S DNA (annealing also to parallel heavy strand mtDNA and corresponding light strand transcript); iii) the proximal D-loop heavy strand displaced by ...

The Location-based service on Wireless Sensor Networks, mainly depend on the Receiver Signal Strength (RSS) to measure the distance between the sender and receiver. The location unaware sensor nodes send beacon periodically which captured by anchor sensor nodes. However, the estimated distances may incur large error, and will risk the localization precision. A secant location estimation algorit...

The paper presents an embedded telemetry system used in combination of localization algorithm for a precise indoor pedestrian localization. The system is based on the association of two wireless technologies: ultrasonic and 802.15.4. The novelty is the use of 802.15.4 RF signal to give the reference starting time of the ultrasonic emission. A ToA (Time of Arrival) measurement provides the dista...

Recently, there has been a growing interest in deep tissue imaging for the study of neurons. Unfortunately, because of the inhomogeneous refractive index of the tissue, the aberrations degrade the resolution and brightness of the final image. In this paper, we describe an adaptive optics confocal fluorescence microscope (AOCFM) which can correct aberrations based on direct wavefront measurement...

In dual-wavelength free-space optical communication systems, the wavefront distortion differences caused by wavelength difference of signal and beacon lights cannot be completely corrected. this study, according to method geometric optics, relationship between phases is analyzed establishing a mathematical model cross-correlation ratio arrival-angle fluctuation phase different Gaussian-beam wav...

This paper describes a method for automatically recharging the batteries on a mobile robot. The robot used in this project is the Nomadic .TechnologiesTM Nomad XR4000 mobile robot. The battery recharging system was implemented using the robot's built-in sensors to control docking with a simple recharging station. The recharging station has an AC power plug, an infra-red beacon and a target desi...

The article deals with the determination of coordinates and orientation angles autonomousunderwater vehicle (AUV) relative to stationary landing platform using high-frequencynear-range hydroacoustic system. navigation task implies maneuvering approachingthe underwater station, which is associated formation zones differentacoustic visibility station's emitters by receiving elements vehicle. Thre...