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  • Medical Device Link .
    through transfusion, but it has recently become apparent that nucleic acid amplification technology narrows the seroconversion windows. While FDA-approved PCR-based assays for the quantitation of HIV-1 viral load exist, there are currently no FDA-approved nucleic acid amplification tests for HIV-1
  • Stiff Competition
    All thermoplastic composites aren't created equal. A systematic material-selection process will help ensure composites perform as expected and don't break the bank in the process. Edited by Jean M. Hoffman Long-fiber compounds provide numerous benefits over steel, such as weight reduction
  • Water Jet Cutting Machine - Tough Environment
    is calendared to thickness in wide slabs that is then slit to 6-8" widths as the slab is fed underneath a bank of water jet cutters. The feeding of the slab is stopped at a cross-cutting station where the leading edge and then the trailing edge of each slab is trimmed by a water jet cutter that traverses across
  • Designing with Thermally Protected TMOV Varistors in TVSS Applications (.pdf)
    Metal Oxide Varistors (MOVs) are commonly used to suppress transients in many applications such as: Transient Voltage Surge Suppressors (TVSS), Uninterruptible Power Supplies (UPS), AC Power Taps, AC Power Meters or other products. Lightning, inductive load switching, or capacitor bank switching
  • F-150 Pickup Gets a New Heart
    forces gases out. A single-overhead cam is used for each cylinder bank. Traditionally, camshafts are permanently synchronized with the crankshaft so they operate valves at a specific point during combustion. However, the new powerplant uses variable-cam timing (VCT) that lets valves operate
  • Your Battery's Best Friend
    the batteries, because even those of you who keep that battery bank primed and preened will still require assistance to charge those batteries, as well as turn DC power into 120-Volt AC to operate various appliances. The RV inverter does both. Do you ever notice that the moment you turn
  • Application of Electromechanical Contactors for Power Factor Correction
    circuits can be either an individual style or of the bank/group style. * Banked or group PFCs are typically controlled with a VAR controller Most loads applied to modern electrical-distribution systems are inductive. Electric motors, transformers, and high-intensity discharge lighting make up
  • Chinese-Built 60 mpg Wildfire Puts a New Face on Motorcycles
    , water-cooled four-stroke twin engine. A four-speed manual transmission includes reverse. Front and rear drum brakes provide stopping power. Cruising speed is 45 mph, and top speed is 65 mph. The delivery version, which has collapsible bed sides, can carry a 1,000-lb load. The vehicles are street
  • Nipping valve-train noise in the virtual bud
    Software roots out design flaws before building pricey prototypes. The PV6 valve-train (right engine bank) simulation models 38 separate components. A simulation snapshot reveals valve-stem deformation -- in reality, too small to see -- exaggerated for clarity. Load dropping to zero indicates

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