"അലക്സാണ്ടർ ക്രിക്‌ടൺ മിച്ചൽ" എന്ന താളിന്റെ പതിപ്പുകൾ തമ്മിലുള്ള വ്യത്യാസം
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"Alexander Crichton Mitchell" എന്ന താൾ പരിഭാഷപ്പെടുത്തിയത്. |
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വരി 5:
1912 -ൽ വിരമിച്ചശേ ഷംസ്കോട്‌ലാന്റിലേക്കുമടങ്ങിയ അദ്ദേഹം തുടക്കത്തിൽ എഡിൻബർഗ് സർവ്വകലാശാലയിൽ ഹോണററി റിസർച്ച് ഫെലോ ആയിട്ടും പിന്നീട് 1916 -ൽ എസ്ക്‌ഡലാമുയിർ ഒബ്സർവേറ്ററിയുടെ സൂപ്രണ്ട് ആയും 1922 -ൽ സ്കോട്ടിഷ് മെറ്റീരിയോളജിക്കൽ ഡിപാർട്ട്മെന്റ് പിരിച്ചുവിട്ടശേഷം തുടങ്ങിയ എഡിൻബർഗ് മെറ്റീരിയോളജിക്കൽ ഡിപാർട്‌മെന്റിന്റെ തലവനായും സേവനമനുഷ്ഠിച്ചു.<ref name="obit" />
Around this time, German U-Boats became operational and a strategy was proposed to destroy the British Empire by blocking key ports such as the Firth of Forth. The Royal Society of Edinburgh set up a War Committee that discussed how science could be applied to defence. Mitchell visited the West Pier at Leith in June 1915 and on 1 August he tried a loop of wire at the end of Leith Pier and found that it could detect a passing trawler through the induced current. He later placed the loop horizontally on the harbour floor and found that it was too sensitive but could detect all passing ships. He solved the sensitivity problem by placing the loop in a figure of eight pattern.<ref>{{cite journal| title=Bragg and Mitchell's antisubmarine loop| last=Walding| first=Richard| journal=Australian Physics| volume=46| issue=5| year=2009| pages=140–145|url=http://aip.org.au/wp-content/uploads/Australian%20Physics/Aust%20Phys%2046-5.pdf}}</ref>
A major publication of Mitchell was a review and history of the study of terrestrial magnetism published in three parts.<ref>{{Cite journal|last=Mitchell|first=A. Crichton|date=1932-06-01|title=Chapters in the history of terrestrial magnetism|url=http://onlinelibrary.wiley.com/doi/10.1029/TE037i002p00105/abstract|journal=Terrestrial Magnetism and Atmospheric Electricity|language=en|volume=37|issue=2|pages=105–146|doi=10.1029/TE037i002p00105|issn=0096-8013}}</ref><ref>{{Cite journal|last=Mitchell|first=A. Crichton|date=1937-09-01|title=Chapters in the history of terrestrial magnetism|url=http://onlinelibrary.wiley.com/doi/10.1029/TE042i003p00241/abstract|journal=Terrestrial Magnetism and Atmospheric Electricity|language=en|volume=42|issue=3|pages=241–280|doi=10.1029/TE042i003p00241|issn=0096-8013}}</ref><ref>{{Cite journal|last=Mitchell|first=A. Crichton|date=1939-03-01|title=Chapters in the history of terrestrial magnetism|url=http://onlinelibrary.wiley.com/doi/10.1029/TE044i001p00077/abstract|journal=Terrestrial Magnetism and Atmospheric Electricity|language=en|volume=44|issue=1|pages=77–80|doi=10.1029/TE044i001p00077|issn=0096-8013}}</ref>
He married Agnes Farquharson Robertson (d. 1948) on 2 May 1892 and they had three children who were born in Trivandrum. He was elected Fellow of the [[Royal Society of Edinburgh]] in 1889 and was curator of the library for long and a Vice President from 1926 to 1929. His work on the variations in the terrestrial magnetic field earned him the [[Keith Medal|Keith Prize]] for 1931-33.<ref name=obit>{{cite journal|author=Watson, R.A. | page= 189|title=Obituary: Dr Alexander Crichton Mitchell| journal=The Meteorological Magazine| volume=81| issue=960| year=1952|url=https://digital.nmla.metoffice.gov.uk/download/file/sdb%3AdigitalFile%7C5ba31888-3ed3-4ce6-8681-bbf37d9ad02b/}}</ref>
== അവലംബം ==
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