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  2. Drilling formula sheets - Wikipedia

    en.wikipedia.org/wiki/Drilling_formula_sheets

    Drilling Formula Sheets is a set of Drilling Formulas used commonly by drilling engineers in the onshore and offshore oil drilling industry. They are used as part of a key piece of engineering work called Well Control .

  3. Gordon–Loeb model - Wikipedia

    en.wikipedia.org/wiki/Gordon–Loeb_model

    The potential loss is €1,000,000 × 0.15 × 0.8 = €120,000. Based on the Gordon-Loeb model, the company’s security investment should not exceed €120,000 × 0.37 = €44,000 . The model was first introduced by Lawrence A. Gordon and Martin P. Loeb in a 2002 paper published in ACM Transactions on Information and System Security , titled ...

  4. Bolt thrust - Wikipedia

    en.wikipedia.org/wiki/Bolt_thrust

    A complicating matter regarding bolt thrust is that a cartridge case expands and deforms under high pressure and starts to "stick" to the chamber. This "friction-effect" can be accounted for with finite elements calculations on a computer, but it is a lot of specialized work and generally not worth the trouble. [2]

  5. Girsanov theorem - Wikipedia

    en.wikipedia.org/wiki/Girsanov_theorem

    The theorem is especially important in the theory of financial mathematics as it explains how to convert from the physical measure, which describes the probability that an underlying instrument (such as a share price or interest rate) will take a particular value or values, to the risk-neutral measure which is a very useful tool for evaluating ...

  6. Beneish M-score - Wikipedia

    en.wikipedia.org/wiki/Beneish_M-Score

    If M-score is less than -1.78, the company is unlikely to be a manipulator. For example, an M-score value of -2.50 suggests a low likelihood of manipulation. If M-score is greater than −1.78, the company is likely to be a manipulator. For example, an M-score value of -1.50 suggests a high likelihood of manipulation.

  7. Buttress thread - Wikipedia

    en.wikipedia.org/wiki/Buttress_thread

    In oil field tubing, buttress thread is a pipe thread form designed to provide a tight hydraulic seal. The thread form is similar to that of Acme thread [10] but there are two distinct threaded portions of differing diameters and profiles, the larger having a wedging profile, with a tapered sealing portion in between the larger and smaller diameters.

  8. Small arms ammunition pressure testing - Wikipedia

    en.wikipedia.org/wiki/Small_arms_ammunition...

    The defined distance for a particular chambering is published in the TDCC data sheet of the chambering. In a rifle cartridge case like the .308 Winchester, the TDCC M = 25.00 value denotes the transducer must be positioned at a distance of 25 millimetres (0.98 in) from the breech face. [2]

  9. List of mathematical abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical...

    pdf – probability density function. pf – proof. PGL – projective general linear group. Pin – pin group. pmf – probability mass function. Pn – previous number. Pr – probability of an event. (See Probability theory. Also written as P or.) probit – probit function. PRNG – pseudorandom number generator.