Zobrazeno 1 - 10
of 11
pro vyhledávání: '"M. E. R. Walford"'
Autor:
M E R Walford
Publikováno v:
Physics Education. 31:211-215
The human body makes widespread use of electrical signals and cell membranes have remarkable electrical properties. The conductivity of muscle tissue varies with frequency and this dependence can be measured with fairly simple equipment. Making measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79f2d3a2aef55f8f0bc53926ac8b2e79
https://doi.org/10.1088/0031-9120/31/4/017
https://doi.org/10.1088/0031-9120/31/4/017
Publikováno v:
Physics Education. 28:117-120
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f849a94c9d34c105a578058c7fd43d50
https://doi.org/10.1088/0031-9120/28/2/010
https://doi.org/10.1088/0031-9120/28/2/010
Publikováno v:
Journal of Glaciology. 37:47-50
A drop of water falling gently on to a cold copper surface freezes to it, forming a curious minaret-shaped pellet of ice. The shear tractive force necessary then to remove the ice pellet depends on the initial temperature of the metal: it is a maximu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be60d395715f4a507faecb71f6615007
https://doi.org/10.1017/s0022143000042787
https://doi.org/10.1017/s0022143000042787
Autor:
M E R Walford
Publikováno v:
Physics Education. 32:46-48
The historical problem of determining longitude at sea is well known. Modern tables of astronomical data that were not available in the 18th century, however, now allow students to make a simple experimental determination of their own longitude.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de5d6ea1cc698a3657b5706bbcd5eb66
https://doi.org/10.1088/0031-9120/32/1/019
https://doi.org/10.1088/0031-9120/32/1/019
Publikováno v:
Journal of Glaciology. 32:39-49
Storglaciären (lat. 67.5° N., long. 17.5° E.) is a sub-polar glacier which has been the object of detailed study for many years. It responds in a sensitive way to annual and long-term changes in climate but it does not surge. Conditions at the bed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20a4e52526e35814b1419f66d6d597e4
https://doi.org/10.1017/s0022143000006857
https://doi.org/10.1017/s0022143000006857
Publikováno v:
Journal of Glaciology. 14:287-292
Laboratory experiments show that pieces of melting ice about one centimetre across, moving under normal loads across roughened glass surfaces, travel much faster than regelation theory predicts. The discrepancy is as much as 40 times for the finest s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::555aef40c3940cf1335830e2628b2151
https://doi.org/10.1017/s0022143000021778
https://doi.org/10.1017/s0022143000021778
Autor:
M. E. R. Walford, M. F. L. Harper
Publikováno v:
Geophysical Journal International. 67:487-514
Summary. The paper discusses the phase-sensitive radio-echo sounder as an instrument for probing the detailed shape of a reflecting glacier bed. Results from laboratory model experiments and from field experiments in the Arctic are presented, togethe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16702991fd47fbd7e345046665de1361
https://doi.org/10.1111/j.1365-246x.1981.tb02762.x
https://doi.org/10.1111/j.1365-246x.1981.tb02762.x
Autor:
M. E. R. Walford
Publikováno v:
Journal of Glaciology. 33:239-242
We discuss the suggestion that small underwater transmitters might be used to illuminate the interior of major englacial water channels with radio waves. Once launched, the radio waves would naturally tend to be guided along the channels until attenu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05f0d39308f616d95485efa0d7423e85
https://doi.org/10.1017/s0022143000008753
https://doi.org/10.1017/s0022143000008753
Autor:
M. E. R. Walford, M. I. Kennett
Publikováno v:
Journal of Glaciology. 35:43-47
A polarization-sensitive aperture-synthesis experiment has been carried out using radio-echo data from Storglaciären, Sweden. Echoes were recorded in each of three antenna configurations over an array of sites on the glacier surface. The echo inform
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3c322f05b79971f5b827e436f9076d5
https://doi.org/10.3189/002214389793701563
https://doi.org/10.3189/002214389793701563
Autor:
M. E. R. Walford
Publikováno v:
Journal of Glaciology. 7:89-94
Field measurements are presented of dielectric absorption in Antarctic snow and ice at frequencies of a few hundred megahertz. They are compared with measurements by other authors at very high frequencies. The dielectric absorption in ice at these fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83203141c1363a258562254f7898f1b8
https://doi.org/10.3189/s0022143000020426
https://doi.org/10.3189/s0022143000020426