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  2. Safe operating area - Wikipedia

    en.wikipedia.org/wiki/Safe_operating_area

    The reverse bias safe operating area (or RBSOA) is the SOA during the brief time before turning the device into the off state—during the short time when the base current bias is reversed. As long as the collector voltage and collector current stay within the RBSOA during the entire turnoff, the transistor will be undamaged.

  3. Bob Lazar - Wikipedia

    en.wikipedia.org/wiki/Bob_Lazar

    Bob Lazar. Robert Scott Lazar ( / ləˈzɑːr /; born January 26, 1959) is an American conspiracy theorist who claims he was hired in the late 1980s to reverse-engineer extraterrestrial technology. This work supposedly occurred at a secret site called "S-4", a subsidiary installation allegedly located several kilometers south of the United ...

  4. p–n junction - Wikipedia

    en.wikipedia.org/wiki/P–n_junction

    The circuit symbol is also shown. A p–n junction is a combination of two types of semiconductor materials, p-type and n-type, in a single crystal. The "n" (negative) side contains freely-moving electrons, while the "p" (positive) side contains freely-moving electron holes. Connecting the two materials causes creation of a depletion region ...

  5. Reverse DNS lookup - Wikipedia

    en.wikipedia.org/wiki/Reverse_DNS_lookup

    In computer networks, a reverse DNS lookup or reverse DNS resolution ( rDNS) is the querying technique of the Domain Name System (DNS) to determine the domain name associated with an IP address – the reverse of the usual "forward" DNS lookup of an IP address from a domain name. [1] The process of reverse resolving of an IP address uses PTR ...

  6. Reverse engineering - Wikipedia

    en.wikipedia.org/wiki/Reverse_engineering

    Reverse engineering. Reverse engineering (also known as backwards engineering or back engineering) is a process or method through which one attempts to understand through deductive reasoning how a previously made device, process, system, or piece of software accomplishes a task with very little (if any) insight into exactly how it does so.

  7. Thrust reversal - Wikipedia

    en.wikipedia.org/wiki/Thrust_reversal

    Thrust reversal, also called reverse thrust, is the temporary diversion of an aircraft engine 's thrust for it to act against the forward travel of the aircraft, providing deceleration. Thrust reverser systems are featured on many jet aircraft to help slow down just after touch-down, reducing wear on the brakes and enabling shorter landing ...

  8. Depletion region - Wikipedia

    en.wikipedia.org/wiki/Depletion_region

    The low current conducted under reverse bias and the large current under forward bias is an example of rectification. Reverse bias. Under reverse bias (applying a negative voltage to the P-side with respect to the N-side), the potential drop (i.e., voltage) across the depletion region increases. Essentially, majority carriers are pushed away ...

  9. Reverse osmosis - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis

    Reverse osmosis ( RO) is a water purification process that uses a semi-permeable membrane to separate water molecules from other substances. RO applies pressure to overcome osmotic pressure that favors even distributions. RO can remove dissolved or suspended chemical species as well as biological substances (principally bacteria ), and is used ...

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