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Fastening Technology & Bolted Joint Design Seminar February 27-28, 2007 Detroit, Michigan USA This two-day seminar gives engineers and technical personnel current specifications for, and a better understanding of, the complexities of mechanical joining with fasteners. Featured topics include bolted/screwed joints, elastic interactions and preload stress, loosening causalities, tightening methods, calculating safety factors and limitations, selecting optimal fasteners for your design, evaluating dissimilar materials for thermal expansion and galvanic properties, and insights into materials, threads, and product standards.

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Who's Who at NASA



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Technologies of the Week

“Micro-needles” have been disclosed that are characterized by their sharpness and side holes that prevent the coring phenomenon seen in standard needles. The needles can be several hundreds of microns in length and avoid most pain receptors in the skin. The sharpness ensures minimal damage to the skin. Click here to view this technology.

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Genetically Engineered Cows



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Nano 50 Awards - Call for Nominations



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Product of the Month

The OP280 series of infrared emitters and the OP580 series of matching silicon photo sensors from OPTEK Technology (Carrollton, TX) were named PTB Product of the Month for January. The OP280 emitter series consists of three standard devices: the OP180 940-nm infrared emitter, the OP280 880-nm infrared emitter, and the OP280K 890-nm infrared emitter; and the OP280PS 850-nm point source infrared emitter and the OP280V 850-nm vertical cavity surface emitting laser (VCSEL) device. The OP580 series of sensors consists of the OP580 phototransistor, the OP580PR silicon photodarlington, and the OP580RB silicon phototransistor with an integrated base-emitter resistor.

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New Directions in Optical Scanning



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