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  2. Thousands of Problems for Theorem Provers - Wikipedia

    en.wikipedia.org/wiki/Thousands_of_Problems_for...

    TPTP (Thousands of Problems for Theorem Provers) [1] is a freely available collection of problems for automated theorem proving. It is used to evaluate the efficacy of automated reasoning algorithms. [2] [3] [4] Problems are expressed in a simple text-based format for first order logic or higher-order logic. [5]

  3. List of NP-complete problems - Wikipedia

    en.wikipedia.org/wiki/List_of_NP-complete_problems

    The problem for graphs is NP-complete if the edge lengths are assumed integers. The problem for points on the plane is NP-complete with the discretized Euclidean metric and rectilinear metric. The problem is known to be NP-hard with the (non-discretized) Euclidean metric. [3]: ND22, ND23

  4. NP-completeness - Wikipedia

    en.wikipedia.org/wiki/NP-completeness

    A polynomial-time problem can be very difficult to solve in practice if the polynomial's degree or constants are large enough. In addition, information-theoretic security provides cryptographic methods that cannot be broken even with unlimited computing power. "A large-scale quantum computer would be able to efficiently solve NP-complete problems."

  5. Dynamic voltage restoration - Wikipedia

    en.wikipedia.org/wiki/Dynamic_Voltage_Restoration

    Dynamic voltage restoration (DVR) is a method of overcoming voltage sags and swells that occur in electrical power distribution. [1] [2] [3] These are a problem because spikes consume power and sags reduce efficiency of some devices.

  6. Environmental Health

    images.huffingtonpost.com/2009-01-27-1476069x82.pdf

    Background Chlorine and caustic soda are produced at chlor-alkali plants using mercury cells or the increasingly popular membrane technology that is mercury free and more energy-

  7. Failure of electronic components - Wikipedia

    en.wikipedia.org/wiki/Failure_of_electronic...

    In semiconductor devices, problems in the device package may cause failures due to contamination, mechanical stress of the device, or open or short circuits. Failures most commonly occur near the beginning and near the ending of the lifetime of the parts, resulting in the bathtub curve graph of failure rates.

  8. Reference class problem - Wikipedia

    en.wikipedia.org/wiki/Reference_class_problem

    In statistics, the reference class problem is the problem of deciding what class to use when calculating the probability applicable to a particular case.. For example, to estimate the probability of an aircraft crashing, we could refer to the frequency of crashes among various different sets of aircraft: all aircraft, this make of aircraft, aircraft flown by this company in the last ten years ...

  9. HuffPost Daily Survey for August 9 2017

    big.assets.huffingtonpost.com/tabsHPWinorLose...

    HuffPost Daily Survey for August 9 2017 August 9 - 10, 2017 - 1000 US Adults 1. Job Approval Do you approve or disapprove of the way Donald Trump is handling his job as President?