Zobrazeno 1 - 10
of 24
pro vyhledávání: '"R. Gathers"'
Publikováno v:
South African Family Practice, Vol 60, Iss 4 (2018)
Background: Melanoma incidence among white South Africans is increasing. Among black individuals, melanoma is associated with advanced stage at presentation and significant mortality. Objectives: A study was undertaken to assess the perception of ski
Externí odkaz:
https://doaj.org/article/e77844e0a84b444fb31d88ff3db0e69f
Autor:
G. R. Gathers
Publikováno v:
International Journal of Thermophysics. 13:539-554
An analysis of multiwavelength pyrometry is made using Monte Carlo methods to evaluate the measurement error as a function of temperature for three, four, five, and six channels. Both a graybody and an emissivity with linear wavelength dependence are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f023613fa2d2718610626239e1fee44a
https://doi.org/10.1007/bf00503888
https://doi.org/10.1007/bf00503888
Autor:
G. R. Gathers
Publikováno v:
International Journal of Thermophysics. 13:361-382
Multiwavelength pyrometry has been advertised as giving significant improvement in precision by overdetermining the solution with extra wavelengths and using least squares methods. Hiernaut et al. [1] have described a six-wavelength pyrometer for mea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::610009dce80832fd6523b3d23df26285
https://doi.org/10.1007/bf00504443
https://doi.org/10.1007/bf00504443
Autor:
G. R. Gathers
Publikováno v:
International Journal of Thermophysics. 13:173-185
A numerical method has been devised to evaluate measurement errors for a three-channel ratio pyrometer as a function of temperature. The pyrometer is simulated by computer codes, which can be used to explore the behavior of various designs. The influ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2226bf3e4dc1b84f941c177f5d13b9f1
https://doi.org/10.1007/bf00503365
https://doi.org/10.1007/bf00503365
Autor:
G. R. Gathers
Publikováno v:
International Journal of Thermophysics. 13:187-198
A numerical method devised to test ratio pyrometers has been used to explore the fitting of a blackbody spectrum and an emissivity model that assumes linear wavelength dependence and arbitrary temperature dependence. The slope and intercept coefficie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1bbe501bdf0cce0df765bdf9154f2888
https://doi.org/10.1007/bf00503366
https://doi.org/10.1007/bf00503366
Autor:
G. R. Gathers
Publikováno v:
International Journal of Thermophysics. 11:693-708
The development of the Isobaric Expansion Experiment at Lawrence Livermore National Laboratory is described. Rod samples are self-heated by current from a capacitor bank while current and sample voltage, sample cross section, and temperature are meas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73a6374d240c32341b4cd0b4c184f8e2
https://doi.org/10.1007/bf01184338
https://doi.org/10.1007/bf01184338
Publikováno v:
International Journal of Thermophysics. 11:819-833
The key issues and anticipated future directions in subsecond thermophysics research are presented and discussed. The main emphasis is placed on experimental techniques for measurements of selected thermophysical properties utilizing rapid volume hea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b54bbdd0369c92904ddde72855325a8
https://doi.org/10.1007/bf01184348
https://doi.org/10.1007/bf01184348
Publikováno v:
International Journal of Impact Engineering. 10:439-452
In the electric gun, the explosion of an electrically heated metal foil and the accompanying magnetic forces are used to accelerate a thin flyer plate to velocities as high as 18 km/s. Here we report preliminary results of a study to extend this capa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1db1c513791bc20dc533fe551aad333
https://doi.org/10.1016/0734-743x(90)90078-a
https://doi.org/10.1016/0734-743x(90)90078-a
Autor:
G. R. Gathers
Publikováno v:
International Journal of Thermophysics. 4:209-226
The electrical resistivity and equation of state of liquid copper and aluminum have been measured to temperatures of 4500 and 4000 K, respectively, using the isobaric expansion apparatus. The specific heats for the liquid are in good agreement with e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fc6e3f84532de0cac54ee768a179fe3
https://doi.org/10.1007/bf00502353
https://doi.org/10.1007/bf00502353
Autor:
G. R. Gathers
Publikováno v:
International Journal of Thermophysics. 4:149-157
We have measured unusually high specific heats for liquid metals using the isobaric expansion apparatus at Lawrence Livermore National Laboratory. In an effort to improve the pyrometer used in the facility, the cause of this discrepancy was discovere
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e1462d67535df453ee0c145dc1ab9a5
https://doi.org/10.1007/bf00500138
https://doi.org/10.1007/bf00500138