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IMO Tier III is a control that only applies in specific areas where the NOx emission are more seriously controlled and apply to the ships constructed after 1 January 2016. For engines under 130 rpm the limit is 3.4 (g/Kwh), engines between 130-1999 rpm the limit us 2.4 (g/kWh), engines above 2000 rpm must have the total weighted cycle emission ...
N-tier architecture is a good fit for small and simple applications because of its simplicity and low-cost. Also, it can be a good starting point when architectural requirements are not clear yet. [1] [2] A three-tier architecture is typically composed of a presentation tier, a logic tier, and a data tier.
Terminal Control Area is "a control area normally established at the confluence of ATS routes in the vicinity of one or more major aerodromes." [1] [3] A control area usually is situated on top of a control zone (CTR) and provides protection to aircraft climbing out from the airport by joining the low-level control zone to the nearest airways ...
Thermal zone mapping uses sensors and computer modeling to create a three-dimensional image of the hot and cool zones in a data center. [105] This information can help to identify optimal positioning of data center equipment. For example, critical servers might be placed in a cool zone that is serviced by redundant AC units.
Secondary standards are designed to protect public welfare, damage to property, transportation hazards, economic values, and personal comfort and well-being from any known or anticipated adverse effects of a pollutant. A district meeting a given standard is known as an "attainment area" for that standard, and otherwise a "non-attainment area". [2]
An area with outdoor air exceeding the limit for a given pollutant is considered a non-attainment area for that pollutant. An area may be a non-attainment area for one pollutant and an "attainment area" for others. However, these pollutants are frequently associated with each other and thus a non-attainment area typically fails multiple standards.
A cleanroom or clean room is an engineered space that maintains a very low concentration of airborne particulates. It is well isolated, well controlled from contamination , and actively cleansed. Such rooms are commonly needed for scientific research and in industrial production for all nanoscale processes, such as semiconductor manufacturing.
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