Zobrazeno 1 - 10
of 393
pro vyhledávání: '"J S, Williams"'
Publikováno v:
APL Materials, Vol 8, Iss 6, Pp 061109-061109-5 (2020)
Au-hyperdoped Si absorbs near-infrared (NIR) light and recent efforts have successfully produced Si-based NIR photodetectors based on this property but with low detection efficiencies. Here, we investigate the differences between the optical and phot
Externí odkaz:
https://doaj.org/article/e2fbffadd35f48c596f7811415c3fc50
Autor:
W. Yang, N. Ferdous, P. J. Simpson, J. M. Gaudet, Q. Hudspeth, P. K. Chow, J. M. Warrender, A. J. Akey, M. J. Aziz, E. Ertekin, J. S. Williams
Publikováno v:
APL Materials, Vol 7, Iss 10, Pp 101124-101124-7 (2019)
Nanosecond pulsed laser melting can be used to rapidly recrystallize ion-implanted Si through liquid phase epitaxy. The rapid resolidification that follows the melting results in a supersaturation of impurities and hyperdopes the Si, inducing novel o
Externí odkaz:
https://doaj.org/article/c699511a08904953959e3c18ab2be066
Publikováno v:
Annales Geophysicae, Vol 20, Pp 1279-1289 (2002)
A relative scintillation index can be derived from EISCAT observations of Interplanetary Scintillation (IPS) usually used to study the solar wind velocity. This provides an ideal opportunity to compare reliable measurements of the solar wind ve
Externí odkaz:
https://doaj.org/article/4c2bb0781ef44365815678df277fa282
Autor:
A. R. Breen, S. J. Tappin, C. A. Jordan, P. Thomasson, P. J. Moran, R. A. Fallows, A. Canals, P. J. S. Williams
Publikováno v:
Annales Geophysicae, Vol 18, Pp 995-1002 (2000)
Simultaneous observations of the slow solar wind off the southeast limb of the Sun were made in May 1999 using optical measurements from the C2 and C3 LASCO coronagraphs on board the SOHO spacecraft and radio-scattering measurements from the MERLI
Externí odkaz:
https://doaj.org/article/43875766334f44838c13905864257bdf
Autor:
P. J. Moran, S. Ananthakrishnan, V. Balasubramanian, A. R. Breen, A. Canals, R. A. Fallows, P. Janardhan, M. Tokumaru, P. J. S. Williams
Publikováno v:
Annales Geophysicae, Vol 18, Pp 1003-1008 (2000)
Observations of interplanetary scintillation (IPS) allow accurate solar wind velocity measurements to be made at all heliographic latitudes and at a range of distances from the Sun. The data may be obtained with either single, double or multiple a
Externí odkaz:
https://doaj.org/article/305659379ebf41bebd4102c95c4b38d7
Publikováno v:
Annales Geophysicae, Vol 17, Pp 1447-1456 (1999)
A meteor radar located at Sheffield in the UK has been used to measure wind oscillations with periods in the range 10–28 days in the mesosphere/lower-thermosphere region at 53.5°N, 3.9°W from January 1990 to August 1994. The data reveal a moti
Externí odkaz:
https://doaj.org/article/70677b214ffa49aaa7cae94121935779
Publikováno v:
Annales Geophysicae, Vol 16, Pp 1138-1143 (1998)
Modern ionosondes make almost simultaneous measurements of the time rate of change of phase path in different directions and at different heights. By combining these 'Doppler' measurements and angles of arrival of many such radar echoes it is poss
Externí odkaz:
https://doaj.org/article/3473aea246c84eac8b365ac6dede2d4a
Publikováno v:
Annales Geophysicae, Vol 16, Pp 1322-1331 (1998)
The drift velocity of an auroral arc is compared with the component of F-region plasma velocity in the same direction for ten cases where the arc is seen to move steadily equatorward for several minutes without any major change in appearance or or
Externí odkaz:
https://doaj.org/article/a78410adc4c64485a5c2475daab3d0d7
Publikováno v:
Annales Geophysicae, Vol 16, Pp 1259-1264 (1998)
EISCAT observations of the interplanetary scintillation of a single source were made over an extended period of time, during which the orientation of the baselines between the two observing sites changed significantly. Assuming that maximum correl
Externí odkaz:
https://doaj.org/article/d2117ee3c0654feeb13d14ee5d0fbb16
Autor:
A. R. Breen, P. J. Moran, C. A. Varley, W. P. Wilkinson, P. J. S. Williams, W. A. Coles, A. Lecinski, J. Markkanen
Publikováno v:
Annales Geophysicae, Vol 16, Pp 1265-1282 (1998)
Co-rotating interaction regions (CIRs) between fast and slow streams of plasma are a prominent feature of the solar wind. Measurements of interplanetary scintillation (IPS) using the three widely separated antennas of the EISCAT facility have been
Externí odkaz:
https://doaj.org/article/fb959a8318da474fab8a89243eafee69