Monday, February 17, 2020

Control System Project for A Car Wash System Assignment

Control System Project for A Car Wash System - Assignment Example Self-generating sensors convert energy for a particular domain to another. The output signal, in this case, turns out to be zero since the signal itself is the only energy applied. For this reason, the sensor is referred to the as self-generating transducer. Self-generating transducers have no output and hence there is no offset as depicted in figure 1 below (Langereis, 1999). This aspect the reason for choosing the thermocouple sensors. Only the slope needs to be known. Â  This group of sensors refers to transducers consisting of devices into which energy could be applied by a specific source. The energy is then modulated using a chemical or physical parameter. Typical examples include the Pt-100 thermo-resistive temperature sensors and pH sensing ISFET. In the case of these sensors, it is possible to eliminate the offset through measuring of the output based on another element that is hardly sensitive to this measured parameter (Kissinger, Hart, & Adams, 1973). In this regard, a zero output would imply that all the conditions in the measuring device equal the conditions at the other device (Langereis, 1999). The choice of these sensors is thus based on the possibility to eliminate undesired signals such as unstable references. The Wheatstone bridge shown below is the most applicable differential set-up in case. Â  The sensor-actuator system is one of the commonest causes of integrated systems and may involve a smart use of data obtained using several sensors. While a typical integration may involve the joining of various structures, it can also involve the integration in data interpretation.

Monday, February 3, 2020

In this assignment, discuss the diagnostic value of less invasive Assignment

In this , discuss the diagnostic value of less invasive imaging modalities - Assignment Example Atherosclerosis is the chief causes of  coronary artery diseases (CAD) which causes changes in structure as well functionality of blood vessels.  It is the process in which, progressive dumping of cholesterol and other fatty materials across the arterial wall occurs. These dumping results in a contriction of the lumen i.e stenosis, which restricts blood flow. Further, spasm, birth defect, lupus, arteritis, blood clogging are few other causes apart from atherosclerosis. Ten years ago, CAD is thought to be a disorder of men. Generally, CAD occurs a decade earlier in men than women,  up to the time of menopause, because a high level of estrogen  protects women from CAD. Anyhow, after menopause, it happens more frequently in women in comparability to men. It is noticed that ratio of women suffering from CAD is higher than men in the age group of or beyond 75. CAD is assumed to be the leading  lifer taker in developed countries. Studies imply about 5-9% of people aged 20+ are su ffering through CAD. The death rate rises with age, and it is more common in males in comparison to females,  but the  death rates for men decrease sharply after age of 55 and finally after aged 75. The death rate of women is higher than men, who are of the same age.  Ã‚  It is estimated that +16 million Americans are suffering through CAD and 8 million of them had a myocardial infarction (increased 1 Million per annum). Framingham trial predicts approximately 50% & 30% of males and females respectively in the age 40+ population are suffering through CAD (Helen H, and Munther K). The most convoluted part of CAD lies in its undetection, mostly CAD remains undetected until the moment of myocardial infarction or even death. It is an alarming situation for Biomedical Scientists to develop a mean to discover CAD as soon as possible to get the best result and prevent diseases. Early detection of CAD allows a physician to  reduce the potential risk factor associated with CAD. There are several methods by which CAD can be diagnosed including an echocardiogram, electrocardiogram, but imaging method like multislice CT angiography, electron-beam computed tomography, nuclear scan, and magnetic resonance angiography, etc, is assumed to be the most effective method for CAD diagnosis. Imaging of CAD is the demand of 21st centuries due to the uninterrupted activity of Heart & acuteness of CAD. Over the last decade, multislice CT Angiography (MSCTA) has been recognised as the most precious & productive method of CAD diagnoses because of lightning technical promotion & enhanced precision (Sun Z, 2010). It has exhibited an immense potential in early identification of CAD because of  improved spatial and temporal resolution.  Ã‚  MSCTA showed enormous technical growth from the early generation of 4-slice CT scanners to subsequent models such as 16-, 64-, dual-source, 256- and 320-slice CT. Retrospective ECG gated method was employed to show the feasibleness of MSCTA w ith 4-slice. It displayed mild accuracy with sensitivity & specificity of 78% and 93%, respectively.