src: s-media-cache-ak0.pinimg.com Direct inward dialing ( DID ), also called direct dial-in ( DDI ) in Europe and Oceania, is a telecommun...
Home › Archives for January 2018
Wednesday, January 31, 2018
Bearing (mechanical)
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Admin - January 31, 2018
src: c8.alamy.com A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between m...
Websites blocked in mainland China
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Admin - January 31, 2018
src: 1.bp.blogspot.com As of September 2017, more than 3,000 websites were blocked in Mainland China under the country's Internet censor...
Drainage
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Admin - January 31, 2018
src: previews.123rf.com Drainage is the natural or artificial removal of a surface's water and sub-surface water from an area. The inte...
H-index
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Admin - January 31, 2018
src: s3.amazonaws.com The h -index is an author-level metric that attempts to measure both the productivity and citation impact of the publ...
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