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  2. List of abbreviations in oil and gas exploration and production

    en.wikipedia.org/wiki/List_of_abbreviations_in...

    SDM/U – subsea distribution module/unit; SDPBH – SDP bottom hole pressure report; SDSS – super duplex stainless steel; SDT – step draw-down test (sometimes SDDT [citation needed]) SDU/M – subsea distribution unit/module; SEA – strategic environmental assessment (United Kingdom) SECGU – section gauge log; SEDHI – sedimentary history

  3. Earthquake engineering - Wikipedia

    en.wikipedia.org/wiki/Earthquake_engineering

    [11] However, such methods are good only for linear elastic systems, being largely unable to model the structural behavior when damage (i.e., non-linearity ) appears. Numerical step-by-step integration proved to be a more effective method of analysis for multi-degree-of-freedom structural systems with significant non-linearity under a transient ...

  4. FN FAL - Wikipedia

    en.wikipedia.org/wiki/FN_FAL

    The sight radius for the FAL 50.00 and FAL 50.41 models is 553 mm (21.8 in) and for the 50.61 and FAL 50.63 models 549 mm (21.6 in). [ citation needed ] FAL rifles have also been manufactured in both light and heavy-barrel configurations, with the heavy barrel intended for automatic fire as a section or squad light support weapon.

  5. Assault rifle - Wikipedia

    en.wikipedia.org/wiki/Assault_rifle

    The FN FAL is a 7.62×51mm, selective fire, automatic rifle produced by the Belgian armaments manufacturer Fabrique Nationale de Herstal (FN). During the Cold War it was adopted by many North Atlantic Treaty Organization (NATO) countries, most notably with the British Commonwealth as the semi-automatic L1A1 .

  6. Spreadsheet - Wikipedia

    en.wikipedia.org/wiki/Spreadsheet

    [1] [2] [3] Spreadsheets were developed as computerized analogs of paper accounting worksheets. [4] The program operates on data entered in cells of a table. Each cell may contain either numeric or text data, or the results of formulas that automatically calculate and display a value based on the contents of other cells.

  7. Confusion matrix - Wikipedia

    en.wikipedia.org/wiki/Confusion_matrix

    In this confusion matrix, of the 8 samples with cancer, the system judged that 2 were cancer-free, and of the 4 samples without cancer, it predicted that 1 did have cancer. All correct predictions are located in the diagonal of the table (highlighted in green), so it is easy to visually inspect the table for prediction errors, as values outside ...

  8. Middle Ages - Wikipedia

    en.wikipedia.org/wiki/Middle_Ages

    Middle Ages c. AD 500 – 1500 A medieval stained glass panel from Canterbury Cathedral, c. 1175 – c. 1180, depicting the Parable of the Sower, a biblical narrative Including Early Middle Ages High Middle Ages Late Middle Ages Key events Fall of the Western Roman Empire Spread of Islam Treaty of Verdun East–West Schism Crusades Magna Carta Hundred Years' War Black Death Fall of ...

  9. Compressive strength - Wikipedia

    en.wikipedia.org/wiki/Compressive_strength

    Compressive strength is measured on materials, components, [1] and structures. [2] The ultimate compressive strength of a material is the maximum uniaxial compressive stress that it can withstand before complete failure. This value is typically determined through a compressive test conducted using a universal testing machine. During the test, a ...