This paper presents a new method for imaging, localizing, and tracking motion behind walls in real-time. The method takes advantage of the motion-induced variance of received signal strength measurements made in a wireless peerto-peer network. Using a multipath channel model, we show that the signal strength on a wireless link is largely dependent on the power contained in multipath components ...

Magnetic resonance imaging provides the unique capability to produce artiicial, high-contrast features called \tags" that are invaluable for tracking tissue motion. Each tag corresponds to an initially planar surface embedded in the tissue that deforms with tissue motion. By tracking tag surface deformation, quantitative analysis of tissue motion can be performed. In this paper, we present a me...

this paper deals with a globally convergent adaptive and sliding mode control of a cart-pole inverted pendulum for trajectory tracking in the presence of a bounded measurement noise and parameter uncertainty. two kinds of controllers have been used for evaluation of tracking error in presence of a bounded noise; as a result, we want to compare that at what time we can see the convergence of tra...

PURPOSE To determine the feasibility of using magnetic resonance imaging (MRI) to non-invasively measure strain in the aortic wall. MATERIALS AND METHODS Cine phase contrast MRI was used to measure the velocity of the aortic wall and calculate changes in circumferential strain over the cardiac cycle. A deformable vessel phantom was used for initial testing and in vitro validation. Ultrasonic ...

When a coronary artery moves, the wall has to change shape. Thus in each cardiac cycle some regions of the wall contract and some dilate. The stress on the coronary wall during ventricular contractions can be calculated by tracking elements in the arterial wall throughout the cycle and calculating their deformation. The method employs a 3D reconstruction process to generate model input for a st...

Rod-shaped bacteria elongate by the action of cell wall synthesis complexes linked to underlying dynamic MreB filaments. To understand how the movements of these filaments relate to cell wall synthesis, we characterized the dynamics of MreB and the cell wall elongation machinery using high-precision particle tracking in Bacillus subtilis. We found that MreB and the elongation machinery moved ci...

one of the main problems in wind energy conversion system (wecs) is how to achieve maxim­u­m output power in different wind speeds. maximum methods for maximum power point tracking in wind energy conversion syst­e­ms require the knowledge of system characteristics and mechanic sensors. so, using these methods practically will follow with high price and an abundant difficulties. in this paper, n...

This paper presents a common gestural interface to mobile and pervasive computing devices. We report our development of a novel technique for recognizing input strokes on a range of mobile and pervasive devices, ranging from small devices with low processing capabilities and limited input area to computers with wall-sized displays and an input area as large as can be accommodated by motion-sens...

Background Time resolved 3-dimensional 3-directional phase contrast (PC) Magnetic Resonance Imaging (4D flow MRI) has advantage over 2-dimensional PC-MRI as it allows accurate quantification of stroke volumes (SV) using retrospective valve tracking and subsequent reconstruction of the transvalvular flow velocity throughout the cardiac cycle. However, the reliability of this method has not been ...

Field orientation control (FOC) of induction machines has permitted fast transient response b y decoupled torque and f lux control. However, f ie ld oraentation detuning caused by parameter variations is a major dificulty for indirect FOC methods. Traditional P ID controlkrs have trouble meeting a wade ranye of tracking performance even when proper field orientation i s achieved. P I D performa...