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  2. Standard penetration test - Wikipedia

    en.wikipedia.org/wiki/Standard_penetration_test

    The standard penetration test (SPT) is an in-situ dynamic penetration test designed to provide information on the geotechnical engineering properties of soil. This test is the most frequently used subsurface exploration drilling test performed worldwide.

  3. Spt function - Wikipedia

    en.wikipedia.org/wiki/Spt_function

    The spt function (smallest parts function) is a function in number theory that counts the sum of the number of smallest parts in each integer partition of a positive integer. It is related to the partition function. [1] The first few values of spt(n) are: 1, 3, 5, 10, 14, 26, 35, 57, 80, 119, 161, 238, 315, 440, 589 ... (sequence A092269 in the ...

  4. SPT-140 - Wikipedia

    en.wikipedia.org/wiki/SPT-140

    SPT-140 is a solar-powered Hall-effect ion thruster, part of the SPT-family of thrusters. SPT stands for Stationary Plasma Thruster . [ 1 ] [ 2 ] Like other members of the SPT series, it creates a stream of electrically charged xenon ions accelerated by an electric field and confined by a magnetic field.

  5. Hall-effect thruster - Wikipedia

    en.wikipedia.org/wiki/Hall-effect_thruster

    Thrust of the first generation of SPT engines, SPT-50 and SPT-60 was 20 and 30 mN respectively. In 1982, the SPT-70 and SPT-100 were introduced, their thrusts being 40 and 83 mN, respectively. In the post-Soviet Russia high-power (a few kilowatts ) SPT-140 , SPT-160, SPT-200, T-160, and low-power (less than 500 W) SPT-35 were introduced.

  6. SPT - Wikipedia

    en.wikipedia.org/wiki/SPT

    Spt function or smallest parts function, related to partition function; Train stations. Sandpoint station, a railway station in Sandpoint, Idaho;

  7. Interceptor multi-threat body armor system - Wikipedia

    en.wikipedia.org/wiki/Interceptor_Multi-Threat...

    The IBA system consists of an Outer Tactical Vest (OTV) and two Small Arms Protective Insert (SAPI) ballistic plates. The OTV features a carrier shell, and three main (flexible) ballistic panel inserts (front left and front right panels, and a rear back panel), [4] which are made with a finely woven Kevlar KM2 fiber.

  8. SPT0615-JD - Wikipedia

    en.wikipedia.org/wiki/SPT0615-JD

    relics spt-cl j0615-5746 336, scb2018 sptj0615-jd1 SPT0615-JD is a dwarf galaxy situated within the constellation Pictor , and is the farthest galaxy ever imaged by means of gravitational lensing , as of 2018.

  9. Social penetration theory - Wikipedia

    en.wikipedia.org/wiki/Social_penetration_theory

    The social penetration theory (SPT) proposes that as relationships develop, interpersonal communication moves from relatively shallow, non-intimate levels to deeper, more intimate ones. [1] The theory was formulated by psychologists Irwin Altman of the University of Utah [ 2 ] and Dalmas Taylor of the University of Delaware [ 3 ] in 1973 to ...