نتایج جستجو برای: mechanical damagesin theprocessof harvestingandpost
تعداد نتایج: 236405 فیلتر نتایج به سال:
Colliding ice floes are often observed to form a series of interlocking fingers. We show that this striking phenomenon is not a result of some peculiar property of ice but rather a general and robust mechanical phenomenon reproducible in the laboratory with other floating materials. We determine the theoretical relationship between the width of the resulting fingers and the material's mechanica...
In the histories of logic and of computer science which mention precursors and pioneers, we often find mention of Leibniz, the great l7th-century mathematician and philosopher, who was one of the first to try to build a mechanical calculator, and who tried to formulate a Mathesis universalis, a sort of scientific language which would permit any two disputants to settle their differences merely ...
Amazon Mechanical Turk (MTurk) is becoming a prevalent source of quick and cost effective data for organizational research, but there are questions about the appropriateness of the platform for organizational research. To answer these questions, we conducted an integrative review based on 75 papers evaluating the MTurk platform and 250 MTurk samples used in organizational research. This integra...
The sphere and circumscribing cylinder engraved on Archimedes’ tombstone commemorate his landmark discovery that their volumes and surface areas are related by the same constant ratio 2/3. He discovered the volume relation and many other geometrical results by mechanical balancing. In particular, he found the volume of a cylindrical wedge by introducing the special balancing shown in Figures 1a...
BACKGROUND This clinical practice guideline addresses six questions related to liberation from mechanical ventilation in critically ill adults. It is the result of a collaborative effort between the American Thoracic Society and the American College of Chest Physicians. METHODS A multidisciplinary panel posed six clinical questions in a Population, Intervention, Comparator, and Outcomes forma...
The past decades have seen a rapid increase in the understanding of plant morphogenesis at the molecular-genetic level. However, the control of growth and morphogenesis by molecular and signaling networks ultimately requires the coordinated regulation of mechanical properties in individual cells. There is also increasing evidence that mechanical stresses can feedback on hormone signaling and gr...
BACKGROUND In South Africa, respiratory protective equipment is often the primary control method used to protect workers. This preliminary study investigated how well a common disposable P2 respirator fitted persons with a range of facial dimensions. METHODS Quantitative respirator fit tests were performed on 29 volunteers from different racial, gender and face size groups. Two facial dimensi...
The linear viscoelasticity of semiflexible polymers is studied through Brownian Dynamics simulations covering a broad range of chain stiffness and time scales. Our results agree with existing theoretical predictions in the flexible and stiff limits; however, we find that over a wide intermediate-time window spanning several decades, the stress relaxation is described by a single power law t(-al...
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