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  2. Comprehensive Nuclear-Test-Ban Treaty - Wikipedia

    en.wikipedia.org/wiki/Comprehensive_Nuclear-Test...

    The Preparatory Commission for the Comprehensive Test Ban Treaty Organization (CTBTO), an international organization headquartered in Vienna, Austria, was created to build the verification framework, including establishment and provisional operation of the network of monitoring stations, the creation of an international data centre (IDC), and ...

  3. String diagram - Wikipedia

    en.wikipedia.org/wiki/String_diagram

    While the diagrams in these first articles were hand-drawn, the advent of typesetting software such as LaTeX and PGF/TikZ made the publication of string diagrams more wide-spread. [ 5 ] The existential graphs and diagrammatic reasoning of Charles Sanders Peirce are arguably the oldest form of string diagrams, they are interpreted in the ...

  4. National pipe thread - Wikipedia

    en.wikipedia.org/wiki/National_pipe_thread

    The taper rate for all NPT threads is 1 inch of diameter in 16 inches of length (3 ⁄ 4 inch per foot or 62.5 millimeters per meter) measured by the change of diameter (of the pipe thread) over distance of thread. The half-angle (between the taper surface and the axis of the pipe) is arctan(1 ⁄ 32) ≈ 1.7899° ≈ 1° 47′.

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

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

    CCL – casing collar locator (in perforation or completion operations, the tool provides depths by correlation of the casing string's magnetic anomaly with known casing features) CCLBD – construction / commissioning logic block diagram; CCLP – casing collar locator perforation; CCLTP – casing collar locator through tubing plug

  6. List of parties to the Comprehensive Nuclear-Test-Ban Treaty

    en.wikipedia.org/wiki/List_of_parties_to_the...

    C: The maintenance of the basic capability to resume nuclear test activities prohibited by the CTBT should the United States cease to be bound to adhere to this treaty. D: Continuation of a comprehensive research and development program to improve our treaty monitoring capabilities and operations.

  7. Kremlin says point of de-ratifying nuclear test ban treaty ...

    www.aol.com/news/kremlin-says-point-ratifying...

    The aim of revoking Russia's ratification of the Comprehensive Nuclear Test Ban Treaty (CTBT) would be to place it on level terms with the United States, not to signal an intention to resume ...

  8. Treaty on the Non-Proliferation of Nuclear Weapons - Wikipedia

    en.wikipedia.org/wiki/Treaty_on_the_Non...

    The Treaty on the Non-Proliferation of Nuclear Weapons, commonly known as the Non-Proliferation Treaty or NPT, is an international treaty whose objective is to prevent the spread of nuclear weapons and weapons technology, to promote cooperation in the peaceful uses of nuclear energy, and to further the goal of achieving nuclear disarmament and general and complete disarmament. [3]

  9. String diagrams - Wikipedia

    en.wikipedia.org/?title=String_diagrams&redirect=no

    Pages for logged out editors learn more. Contributions; Talk; String diagrams