Introduction
A motion detector is an electronic device that detects the physical movement in a given area and transforms motion into an electric signal. The motion detector may be electrically connected to devices such as security, lighting, audio alarms, and the like. Motion sensors are used in a wide variety of applications and as a result many different types of motion sensors are available. Motion detectors are mainly used in for security systems. For example, motion detectors are typically positioned near exter ....etc

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Presented by:
Ahmed Hamed


Physics of diagnostic ultrasound
Sound :is amechanical energy transmitted by pressure waves in amaterial medium#sound categories: Infrasonic: less than 20 HZ Audible sound: from 20 HZ to 20 KHZ ultrasound:from 20 KHZ to 30 MHZ #source of motion :any vibrating object
#The source of sound waves in medical ultrasound is apiezoelectric transducer
Wave motion : [/b ....etc

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Abstract:
Ultrasound Identification is a Real Time Locating System (RTLS) is used to automatically track and identify the location of objects using simple inexpensive nodes (badges/tags) attached to or embedded in objects and devices which then transmit an ultrasound signal to communicate their location to microphone sensors.Ultrasound-based IPS is considered a better alternative to passive Radio-frequency identification (pRFID) in complex indoor environments (such as hospitals), where radio waves may reflect off of metallic or ceramic object ....etc

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how i can design blind Disobeyed that can the blind move without Collide the wall that the distance will be 1m just and then if the blind man Approaching more from the wall then an buzzer will Sounders
please help me >>> ....etc

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I am esther, a student of physics in the university of jos, nigeria. i need a detailed guide on how to go about the project stated above. ....etc

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ABSTRACT
This paper presents a new measure of heart rate variability (HRV) that can be estimated using Doppler ultrasound techniques and is robust to variations in the angle of incidence of the ultrasound beam and the measurement noise. This measure employs the multiple signal characterization (MUSIC) algorithm which is a high-resolution method for estimating the frequencies of sinusoidal signals embedded in white noise from short-duration measurements. We show that the product of the square root of the estimated signal-to-noise ratio ....etc

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Abstract

In foam extrusion, material density is the most significant factor affecting the product cost and therefore the profitability of the manufacturing process. A reduction in the density of extruded parts reduces the raw material cost and therefore increases its profitability. On the other hand, a reduction in foam density degrades the mechanical properties and geometrical accuracy of extruded parts. Therefore, a critical balance has always to be achieved in order to minimize the material cost while maintaining adequate strength and acc ....etc

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Ultrasound Usage in Mobility Aid Systems



The mobility aid system works on the simple principle of reflection of sound waves from the obstacle or an object. For this set up, the system has a simple battery operated circuit, acting as an oscillator producing the required 40 KHz frequency for the operation of the ultrasound generator. The ultrasound generator generates sound waves, which are higher in frequency than the human audible range . Thus gen ....etc

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Carl Fischer
Computing Department
Lancaster University
Lancaster, UK.
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Kavitha Muthukrishnan
Faculty of Computer Science
University of Twente
Enschede, The Netherlands.
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Mike Hazas
Computing Department
Lancaster University
Lancaster, UK.
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Hans Gellersen
Computing Department
Lancaster University
Lancaster, UK.


ABSTRACT

Ad hoc solutions for tracking and providing navigation sup- port to emergency response teams ....etc

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Presented by:
SUVENDU NAYAK




OBJECTIVE:
In order to prevent thrombogenesis in the artifical heart, a prototype ultrasound thrombolysis system is developed.
Thrombus formation in artificial hearts remains a key risk factor in the death of patients. So, the system is assumed to work continously, dissolving micro thrombi before they can grow.
The purpose of this study is to develop the system that can be mounted in the artificial heart.

Introduction:
Patients requi ....etc

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