منابع مشابه
Whole-Body Vibration in Farming: Background Document for Creating a Simplified Procedure to Determine Agricultural Tractor Vibration Comfort
Operator exposure to high levels of whole-body vibration (WBV) presents risks to health and safety and it is reported to worsen or even cause back injuries. Work activities resulting in operator exposure to whole-body vibration have a common onset in off-road work such as farming. Despite the wide variability of agricultural surface profiles, studies have shown that with changing soil profile a...
متن کاملInfluence of background noise on non-contact vibration measurements using particle velocity sensors
ABSTRACT Structural vibrations are usually measured using accelerometers or laser Doppler vibrometers. However, the weight of the accelerometers can influence vibration patterns and lasers can have problems with non-reflective or fibrous materials. Alternatively, vibration can also be measured acoustically using particle velocity sensors positioned near the structure. Although the capabilities ...
متن کاملVibration modes of giant gravitons in the background of dilatonic D-branes
We consider the perturbation of giant gravitons in the background of dilatonic D-branes whose geometry is not of a conventional form of AdSm×S. We use the quadratic approximation to the brane action to investigate their vibrations around the equilibrium configuration. We found the normal modes of small vibrations of giant gravitons and these vibrations are turned out to be stable. Electronic ad...
متن کاملTemperature and vibration thresholds in vibration syndrome.
In a study to investigate whether the quantitative assessment of temperature and vibration thresholds can improve the evaluation of the neurological symptoms in vibration syndrome 37 patients with neurological symptoms (paraesthesias, numbness, pain) in the hands who had worked with hand held vibrating tools and 46 healthy controls not exposed to vibration were examined. Temperature thresholds ...
متن کاملGeneric Vibration Criteria for Vibration-Sensitive Equipment
The vibration criterion (VC) curves, commonly used in the design of facilities which house vibration-sensitive instruments and tools, were developed by the author and his colleagues, in the early 80’s, published by SPIE in 1991 and by IEST in 1993. Each of the criterion curves A through E is associated with a “line width” or “detail size” which was an attempt by the authors to describe the capa...
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ژورنال
عنوان ژورنال: Transit
سال: 2012
ISSN: 1551-9627
DOI: 10.5070/t781013091