منابع مشابه
DGPS Directional Signal Strength Meter
Gregory Johnson is a Senior Program Manger at Alion Science & Technology, JJMA Maritime Sector. He heads up the New London, CT office which provides research and engineering support to the Coast Guard Academy and R&D Center. He has a BSEE from the USCG Academy (1987) a MSEE from Northeastern University (1993) and a PhD in Electrical Engineering from the University of Rhode Island (2005). Dr. Jo...
متن کاملUltra-strength materials
Recent experiments on nanostructured materials, such as nanoparticles, nanowires, nanotubes, nanopillars, thin films, and nanocrystals have revealed a host of ‘‘ultra-strength” phenomena, defined by stresses in a material component generally rising up to a significant fraction > 1 10 of its ideal strength – the highest achievable stress of a defect-free crystal at zero temperature. While conven...
متن کاملMechanics of Ultra - Strength Materials
167 Abstract Recent experiments on nanoscale materials, including nanowires, nanopillars, nanoparticles, nanolayers, and nanocrystals, have revealed a host of “ultra-strength” phenomena, defined by stresses in the material generally rising up to a significant fraction of the ideal strength—the highest achievable strength of a defect-free crystal. This article presents an overview of the strengt...
متن کاملMinimally invasive dentistry using sonic and ultra-sonic devices in ultraconservative Class 2 restorations.
AIM Within the context of minimally invasive dentistry this article describes the sonic and ultrasonic cavity preparation techniques and assesses their advantages and disadvantages, clinical difficulties of their use, and offers a statement about these devices. BACKGROUND Ultra-conservative Class 2 restorative techniques require the use of devices such as sonic and the new ultrasonic preparat...
متن کاملUltra Sonic Image Interpretation for Non-Destructive Testing
For interpretation of ultra sonic images an image interpretation system based on case based reasoning is proposed. We describe the case representation and the case based reasoning process.
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ژورنال
عنوان ژورنال: JAPAN TAPPI JOURNAL
سال: 1971
ISSN: 0022-815X,1881-1000
DOI: 10.2524/jtappij.25.4_196