Zobrazeno 1 - 10
of 12
pro vyhledávání: '"J F W Bell"'
Autor:
J F W Bell, J M Pelmore
Publikováno v:
Journal of Physics E: Scientific Instruments. 10:1145-1149
An instrument using a resonator-terminated acoustic transmission line has been developed for absolute internal friction measurements in the 10 kHz-1 MHz range. It can be used for material studies at temperatures of up to 2000 degrees C and, in the fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ec5280fc39fa0ffc7ed63ee304bf8c4
https://doi.org/10.1088/0022-3735/10/11/016
https://doi.org/10.1088/0022-3735/10/11/016
Publikováno v:
International Journal of Electronics. 36:565-570
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b55d3f6deb1ff8b030aa0329b6f963af
https://doi.org/10.1080/00207217408900443
https://doi.org/10.1080/00207217408900443
Autor:
J F W Bell, A A Fathimani
Publikováno v:
Journal of Physics E: Scientific Instruments. 11:588-596
An ultrasonic thermometer using the temperature dependence of ultrasonic velocity as the transducing mechanism has been developed for high temperature measurement. Essentially it is a long, thin probe consisting of a magnetostrictive launcher produci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b105f7a11a9133f3ffc00718128382d4
https://doi.org/10.1088/0022-3735/11/6/021
https://doi.org/10.1088/0022-3735/11/6/021
Publikováno v:
The Journal of the Acoustical Society of America. 57:1085-1093
Vibrational sensors can be designed in such a way that the frequency of one of their modes of vibration is a function of temperature, pressure, density, or other parameter, making them the basis of various instrumentation transducers. These can be dr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4d1018c8d205a63ab175163b4a28a71
https://doi.org/10.1121/1.380557
https://doi.org/10.1121/1.380557
Autor:
J. F. W. Bell
Publikováno v:
Il Nuovo Cimento. 7:92-96
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcb88ba6327dafd0afd1d36fd6f15bb0
https://doi.org/10.1007/bf02784297
https://doi.org/10.1007/bf02784297
Autor:
J F W Bell
Publikováno v:
British Journal of Applied Physics. 2:324-327
A radio frequency bridge for the rapid measurement of resistance and Q-factor of piezoelectric crystals is described. The limitation of the accuracy of measurement due to frequency fluctuations of the generator used and to variations in the stray cap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8e4301990fe5571de54fc34fa1c48a7
https://doi.org/10.1088/0508-3443/2/11/304
https://doi.org/10.1088/0508-3443/2/11/304
Autor:
J. F. W. Bell
Publikováno v:
Philosophical Magazine. 2:1113-1120
A pulse method of measuring the velocity of sound in thin rods over a wide temperature range, in some cases to the melting point, has been developed. The results of measurements on aluminium, brass, nickel, iron, lead, solder and thallium show that,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6144485181663628b7447cee3791fdf
https://doi.org/10.1080/14786435708242741
https://doi.org/10.1080/14786435708242741
Autor:
J. F. W. Bell
Publikováno v:
The Journal of the Acoustical Society of America. 25:96-100
A fixed path interferometer, using variable temperature for the measurement of the absorption in gases in the low f/p region is described. Its use is illustrated by measurements on argon, neon, air, nitrogen, and nitrogen‐hydrogen mixtures at 250 k
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4a38fda4b7507dd6c52721ababa8aff
https://doi.org/10.1121/1.1907017
https://doi.org/10.1121/1.1907017
Publikováno v:
Journal of Scientific Instruments. 43:28-31
The instrument measures the velocity and attenuation of longitudinal and torsional acoustic pulses in thin rods. The pulses are generated in a nickel tube transducer. The main uses of the instrument have been found to be in the metallurgical field wh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d981a72bbc01f0733ce3c6ea92fb4d3
https://doi.org/10.1088/0950-7671/43/1/307
https://doi.org/10.1088/0950-7671/43/1/307
Autor:
J F W Bell
Publikováno v:
Proceedings of the Physical Society. Section B. 63:958-964
An experimental investigation into the origin of satellite resonances has been carried out by the author. They are identified as mode resonances of the gas in the interferometer tube and are of the type described by Lord Rayleigh. The presence of unr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db5cf1480f9fdbb20cf236f1795b4fce
https://doi.org/10.1088/0370-1301/63/11/313
https://doi.org/10.1088/0370-1301/63/11/313