نتایج جستجو برای: force transducer
تعداد نتایج: 206652 فیلتر نتایج به سال:
Background and aim: Aloe vera leaves have long been used in medicine and nutrition used by various communities. Some of the physiological effects of this plant have been used to treat some gastrointestinal disorders such as gastric ulcer, gastric acid back to esophagus. Therefore, In the present study, the effect of hydroalcoholic extract of aloe vera on mechanical activity of isolated colon of...
where w [W/m] and c [m/s] are the sound intensity and the sound velocity, respectively. N is the number of the transducers used to form the array. S [m] is the radiation area of a single transducer and Stot = NS. A common airborne ultrasound transducer, which is used for the measurement of the distance or the detection of objects, can emit about 0.041 W of ultrasound in normal use. Hence, if th...
The purposes of this investigation were to evaluate the occurrence of a small amplitude counter-movement (SACM) in SJ (squat jump) trials of elite athletes to determine the efficacy of gross observation and the use of a portable position transducer to determine whether or not a SACM occurred. The subjects (N = 30, 20.1 +/- 3.0 years, 199.0 +/- 8.4 cm, and 87.2 +/- 9.5 kg) were a combination of ...
In the seventies of the past century ballistocardiography had been thought to be obsolete in cardiology for impossibility of objective calibration. In the present work the quantitative ballistocardiography (Q-BCG) for measurement of systolic force (F) and minute cardiac force (MF) in sitting subject was described. The new principle of piezoelectric transducer enabled to register the force cause...
An actuation method for atomic force microscope ~AFM! cantilevers in fluids is reported. The radiation pressure generated by a focused acoustic transducer at radio frequency ~rf! ~100–300 MHz! exerts a localized force of controlled amplitude at a desired location on the AFM cantilever. This force can be used to measure the spring constant and other dynamic properties of the cantilever. Furtherm...
This paper presents a new robotic system designed to assist sonographers in performing ultrasound examinations by addressing common limitations of sonography, namely the physical fatigue that can result from performing the examination, and the difficulty in interpreting ultrasound data. The proposed system comprises a robot manipulator that operates the transducer, and an integrated user interf...
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