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  • Transformerless UPS Systems (.pdf)
    with a transformer, or multiple smaller UPS power modules paralleled together to achieve the required capacity. Most UPS manufacturers are finding it difficult to create a true on-line double conversion transformerless UPS system larger than 200 kW due to factors such as ground faults, high frequency noise
  • Smaller really is better
    for testing and certifying Navy antenna systems. The conclusion: smaller is better. Vincent's Plano Spiral Top Hat 7-MHz antenna, for example, is half the size of a normal quarter-wave antenna operating at that frequency. The URI antenna gain matched that of the ideal quarter-wave antenna, and its bandwidth
  • Solid structures for machining centers
    for accuracy and productivity. Most machines on the market tend to have similar portal designs with stationary, rigid double columns for stability. Where they differ is in the mounting positions for the Y-axis slide. The slide may be vertical, at 45 or 60 angles, or horizontal, and this can impact
  • | Electronics Industry News for EEs & Engineering Managers
    in value terms, the report said. Sirenza to buy RF amplifier specialist Xemod SUNNYVALE, Calif. -- Sirenza Microdevices Inc., a supplier of radio frequency (RF) components is to buy Xemod Inc. for approximately $4.5 million in cash, with extra cash to come for the achievement of certain technology
  • Medical Device Link .
    rheumatic condition. As an example, antibodies reactive with native double-stranded DNA (dsDNA) are often associated with a diagnosis of systemic lupus erythematosus (SLE). However, anti-dsDNA antibodies are also found in some individuals with rheumatoid arthritis, Sj ogren 's syndrome, scleroderma

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