Copyright © Philip M. Parker, INSEAD. Terms of Use.
| Domain | Definition |
Mining | The proportion of a coal seam that is removed from a mine. The remainder may represent coal in pillars or coal that is too thin or inferior to mine or is lost in mining. Shallow coal mines working under townships, reservoirs, etc., may extract only about 50% of the entire seam, the remainder being left as pillars to protect the surface. Under favorable conditions, longwall conveyor mining may extract from 80% to 95% of the entire seam. With pillar methods of working, the extraction ranges from50% to 90%, depending on local conditions. (references) |
Source: compiled by the editor from various references; see credits. | |
Hexadecimal (or equivalents, 770AD-1900s) (references)50 45 52 43 45 4E 54 41 47 45 45 58 54 52 41 43 54 49 4F 4E |
| Leonardo da Vinci (1452-1519; backwards) (references)
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Binary Code (1918-1938, probably earlier) (references)01010000 01000101 01010010 01000011 01000101 01001110 01010100 01000001 01000111 01000101 00100000 01000101 01011000 01010100 01010010 01000001 01000011 01010100 01001001 01001111 01001110 |
HTML Code (1990) (references)P E R C E N T A G E   E X T R A C T I O N |
ISO 10646 (1991-1993) (references)0050 0045 0052 0043 0045 004E 0054 0041 0047 0045 0045 0058 0054 0052 0041 0043 0054 0049 004F 004E |
Encryption (beginner's substitution cypher): (references)50395237394854354139239585452353754434948 |
| 1. Orthography 2. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
