منابع مشابه
Tiny bubbles challenge giant turbines: Three Gorges puzzle.
Since the birth of the first prototype of the modern reaction turbine, cavitation as conjectured by Euler in 1754 always presents as a challenge. Following his theory, the evolution of modern reaction (Francis and Kaplan) turbines has been completed by adding the final piece of the element 'draft-tube' that enables turbines to explore water energy at efficiencies of almost 100%. However, during...
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A vital step in growth factor-driven angiogenesis is the coordinated engagement of endothelial integrins with the extracellular matrix. The molecular mechanisms that partner growth factors and integrins are being elucidated, revealing an intricate interaction of surface receptors and their signaling pathways.
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The human visual system is remarkably tolerant to degradations in image resolution: in a scene recognition task, human performance is similar whether 32 × 32 color images or multi-mega pixel images are used. With small images, even object recognition and segmentation is performed robustly by the visual system, despite the object being unrecognizable in isolation. Motivated by these observations...
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Background and Objectives: With recent declines in aquaculture resources, the use of new protein sources has expanded; as a result, it is necessary to use tiny shrimp of Anzali International Lagoon for its high nutritional value. Materials & Methods: Macrobrachium nipponense non-native shrimp, after catching and washing with cold water, was dried in cabinet, oven and under vacuum dryers at 7...
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This work presents the first known implementation of elliptic curve cryptography for sensor networks, motivated by those networks’ need for an efficient, secure mechanism for shared cryptographic keys’ distribution and redistribution among nodes. Through instrumentation of UC Berkeley’s TinyOS, this work demonstrates that secret-key cryptography is already viable on the MICA2 mote. Through anal...
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ژورنال
عنوان ژورنال: Bulletin of the African Bird Club
سال: 2008
ISSN: 1352-481X
DOI: 10.5962/p.309851