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  2. Device configuration overlay - Wikipedia

    en.wikipedia.org/wiki/Device_configuration_overlay

    However, the Linux test environment automatically removed the HPA on the test drive, allowing the tool to image sectors hidden by an HPA. The tool did not acquire sectors hidden by a DCO." [4] AccessData's FTK Imager 2.5.3.14 was validated by the National Institute of Justice (NIJ) in June 2008. Their findings indicated that "If a physical ...

  3. Host protected area - Wikipedia

    en.wikipedia.org/wiki/Host_protected_area

    The Sleuth Kit (free, open software) by Brian Carrier (HPA identification is currently only supported on Linux.) Note that the HPA feature can be hidden by DCO commands (documentation states only if the HPA is not in use), and can be "frozen" (until next power-down of the hard disk) or be password protected. [citation needed]

  4. Human-powered aircraft - Wikipedia

    en.wikipedia.org/wiki/Human-powered_aircraft

    A human-powered aircraft (HPA) is an aircraft belonging to the class of vehicles known as human-powered transport.. As its name suggests, HPAs have the pilot not only steer, but power the aircraft (usually propeller-driven) by means of a system similar to a bicycle or tricycle: a pair of pedals, moved by the pilot's feet that turns a gear, which then moves a bicycle chain, which then rotates a ...

  5. Caliber conversion device - Wikipedia

    en.wikipedia.org/wiki/Caliber_conversion_device

    A caliber conversion device is a device which can be used to non-permanently alter a firearm to allow it to fire a different cartridge than the one it was originally designed to fire. The different cartridge must be smaller in some dimensions than the original design cartridge, and since smaller cartridges are usually cheaper, the device allows ...

  6. Pressure altitude - Wikipedia

    en.wikipedia.org/wiki/Pressure_altitude

    Old altimeters were typically limited to displaying the altitude when set between 950 mb and 1030 mb. Standard pressure, the baseline used universally, is 1013.25 hectopascals (hPa), which is equivalent to 1013.25 mb or 29.92 inches of mercury (inHg). This setting is equivalent to the atmospheric pressure at mean sea level (MSL) in the ISA

  7. Flight level - Wikipedia

    en.wikipedia.org/wiki/Flight_level

    The rule affected only those aircraft operating under IFR when in level flight above 3,000 ft above mean sea level, or above the appropriate transition altitude, whichever is the higher, and when below FL195 (19,500 ft above the 1013.2 hPa datum in the UK, or with the altimeter set according to the system published by the competent authority in ...

  8. 'Boy in the Box' Was Found Slain, Severely Beaten and Nude ...

    www.aol.com/boy-box-found-slain-severely...

    Two years after finally being identified, the "Boy in the Box" case continues to haunt Philadelphia. The slain body of Joseph Augustus Zarelli, 4, was discovered in February 1957 in Philadelphia's ...

  9. Hypophosphorous acid - Wikipedia

    en.wikipedia.org/wiki/Hypophosphorous_acid

    HPA is usually supplied as a 50% aqueous solution and heating at low temperatures (up to about 90 °C) prompts it to react with water to form phosphorous acid and hydrogen gas. H 3 PO 2 + H 2 O → H 3 PO 3 + H 2. Heating above 110 °C causes hypophosphorous acid to undergo disproportionation to give phosphorous acid and phosphine. [7] 3 H 3 PO ...