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1.
John Tebbutt was Australia's pre-eminent 19th-century astronomer who discovered two great comets of that century. Ragbir Bathal tells his story. 相似文献
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Summary An induced anisotropy of magnetic susceptibility results from the domain alignment which is produced by treating stationary specimens in a strong alternating field. Appreciable domain re-orientation occurs in fields as low as 50 oersteds and the effect must therefore normally be an important part of the process of alternating field demagnetization. Induced anisotropy has been measured in a number of igneous rocks with a range of palaeomagnetic stabilities and in magnetite powders of controlled grain sizes, dispersed in plaster or kaolin specimens which were mechanically deformed to produce instrinsic magnetic anisotropy by grain alignment. The saturation magnitude of the induced anisotropy is not a function of grain size but the saturating field required increases with decreasing grain size. In the larger grains, induced anisotropy is a function of grain orientation. 相似文献
3.
Raghir Bhathal 《Astronomy& Geophysics》2000,41(1):1.25-1.26
After almost 40 years of fruitless search for extraterrestrial life in the radio region, Raghir Bhathal argues that it is time to expand the search to other parts of the electromagnetic spectrum. 相似文献
4.
Meryl Waugh M. J. Drinkwater R. L. Webster L. Staveley-Smith V. A. Kilborn D. G. Barnes R. Bhathal W. J. G. de Blok P. J. Boyce M. J. Disney R. D. Ekers K. C. Freeman B. K. Gibson P. A. Henning H. Jerjen P. M. Knezek B. Koribalski M. Marquarding R. F. Minchin R. M. Price M. E. Putman † S. D. Ryder E. M. Sadler F. Stootman M. A. Zwaan 《Monthly notices of the Royal Astronomical Society》2002,337(2):641-656
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To some indigenous Australians, the Southern Cross is a stingray being chased by a shark. To others it is an eagle's footprint. Ragbir Bhathal describes how the Aboriginal peoples' views of the skies not only differ from, but probably pre-date, those of other civilizations. 相似文献
6.
R.S. Bhathal 《Earth》1971
In any rock six kinds of magnetic anisotropy can be distinguished, viz.: (1) shape alignment of grains; (2) alignment of crystals with magneto-crystalline anisotropy; (3) alignment of magnetic domains; (4) the stringing-together of magnetic grains, which is a special case of (1); (5) stress-induced anisotropy; and (6) exchange anisotropy. Each of these anisotropies, together with the method of measurement and practical uses in the fields of geology and geophysics, is discussed. 相似文献
7.
R. S. Bhathal 《Pure and Applied Geophysics》1973,111(1):2333-2335
Summary Preliminary experiments conducted on rocks under uniaxial compression seem to indicate that the magnetic susceptibility parallel to the domain wallsK
does not play an effective role in stress-induced anisotropy. 相似文献
8.
Ragbir Bhathal 《Astronomy& Geophysics》2005,46(6):6.35-6.36
Ragbir Bhathal reports on the ambitious plans of Australian astronomers to keep Australian astronomy competitive on the international scene for the next decade and beyond. 相似文献
9.
O. I. Wong E. V. Ryan-Weber D. A. Garcia-Appadoo R. L. Webster L. Staveley-Smith M. A. Zwaan M. J. Meyer D. G. Barnes V. A. Kilborn R. Bhathal W. J. G. de Blok M. J. Disney M. T. Doyle M. J. Drinkwater R. D. Ekers K. C. Freeman B. K. Gibson S. Gurovich J. Harnett P. A. Henning H. Jerjen M. J. Kesteven P. M. Knezek B. S. Koribalski S. Mader M. Marquarding R. F. Minchin J. O'Brien M. E. Putman S. D. Ryder E. M. Sadler J. Stevens I. M. Stewart F. Stootman M. Waugh 《Monthly notices of the Royal Astronomical Society》2006,371(4):1855-1864
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