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  2. Freeform surface modelling - Wikipedia

    en.wikipedia.org/wiki/Freeform_surface_modelling

    Freeform surface modelling is a technique for engineering freeform surfaces with a CAD or CAID system.. The technology has encompassed two main fields. Either creating aesthetic surfaces (class A surfaces) that also perform a function; for example, car bodies and consumer product outer forms, or technical surfaces for components such as gas turbine blades and other fluid dynamic engineering ...

  3. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  4. List of preprint repositories - Wikipedia

    en.wikipedia.org/wiki/List_of_preprint_repositories

    A free preprint service for electrochemistry and solid state science and technology >100 2018 Center for Open Science: EdArXiv: Education: A Preprint Server For The Education Research Community >100 2019 Center for Open Science: engrXiv [12] Engineering: Open archive of engineering preprints >1,000 2016 Open Engineering Inc: ESSOAr: Earth science

  5. Grading (earthworks) - Wikipedia

    en.wikipedia.org/wiki/Grading_(earthworks)

    Section through railway track and foundation showing the sub-grade. Grading in civil engineering and landscape architectural construction is the work of ensuring a level base, or one with a specified slope, [1] for a construction work such as a foundation, the base course for a road or a railway, or landscape and garden improvements, or surface drainage.

  6. Preload (engineering) - Wikipedia

    en.wikipedia.org/wiki/Preload_(engineering)

    Preload is an engineering term with several meanings. In the general sense, it refers to the internal application of stress to certain mechanical systems.

  7. Glossary of oilfield jargon - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_oilfield_jargon

    Bell nipple: An enlarged pipe at the top of a casing string that serves as a funnel to guide drilling tools into the top of the well. Big bear: A big bear is a hitch (see hitch) that lasts a minimum of 50 straight days. Black Leg : Joints of pipe racked back in the derrick. Blowout: A sudden, uncontrolled release of underground pressure from ...

  8. Chemical Agents Warning Latency Initial Symptoms Properties ...

    images.huffingtonpost.com/2008-06-02-guide1.pdf

    Chemical Agents Warning Properties Latency Period Initial Symptoms Blister Agents Lewisite Gas: colorless Odor: geraniums Seconds to minutes

  9. Patch test (finite elements) - Wikipedia

    en.wikipedia.org/wiki/Patch_test_(finite_elements)

    A broader definition of patch test (applicable to any numerical method, including and beyond finite elements) is any test problem having an exact solution that can, in principle, be exactly reproduced by the numerical approximation. Therefore, a finite-element simulation that uses linear shape functions has patch tests for which the exact ...