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The Risk Management Framework (RMF) is a United States federal government guideline, standard, and process for managing risk to help secure information systems (computers and networks). The RMF was developed by the National Institute of Standards and Technology (NIST), and provides a structured process that integrates information security ...
NIST SP 800-53 Revision 5 removes the word "federal" to indicate that these regulations may be applied to all organizations, not just federal organizations. The first public draft was published on August 15, 2017. A final draft release was set for publication in December 2018, with the final publication date set for March 2019."
[1] [2] The modern definition is exactly 12,000 Btu IT /h (3.516853 kW). Air-conditioning and refrigeration equipment capacity in the U.S. is often specified in "tons" (of refrigeration). Many manufacturers also specify capacity in Btu/h, especially when specifying the performance of smaller equipment.
A representative pressure–volume diagram for a refrigeration cycle. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), [1] in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air conditioning of buildings and automobiles.
Thermo King refrigeration unit on a DAF refrigerated truck In 1942, Jones developed the first portable refrigeration units for troops stationed overseas in World War II . Thermo King also introduced the first gasoline-powered mechanical refrigerated boxcars in the 1940s, which reduced shipping costs, making fresh produce more widely available ...
NIST Special Publication 800-37 Rev. 1 was published in February 2010 under the title "Guide for Applying the Risk Management Framework to Federal Information Systems: A Security Life Cycle Approach". This version described six steps in the RMF lifecycle. Rev. 1 was withdrawn on December 20, 2019 and superseded by SP 800-37 Rev. 2. [1]
A cascade refrigeration cycle is a multi-stage thermodynamic cycle. An example two-stage process is shown at right. (Bottom on mobile) The cascade cycle is often employed for devices such as ULT freezers. [1] In a cascade refrigeration system, two or more vapor-compression cycles with different refrigerants are used.
[4] [5] In 2018, Embraco closed its factory in Turin and moved it to Slovakia, albeit leaving a business office in Turin. [6] In April 2018, Whirlpool Corporation entered into an agreement with Nidec Corporation to sell Embraco for $1.08 billion. [7] Headquartered in Brazil, Embraco had been a Whirlpool Corporation business unit since 1994.
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