Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Richard C. Birkebak"'
Autor:
Ariono Abdulkadir, Richard C. Birkebak
Publikováno v:
Journal of Mathematical and Fundamental Sciences, Vol 8, Iss 1 (2019)
Ringkasan. Determination of surface - finish quality is done by measurements of its rms. Values of surface roughness and slopes. Mechanical measurements of these properties are done by using a profilometer. This method, however, is limited to surface
Externí odkaz:
https://doaj.org/article/69aa9f44796d40bab2b090eef1b44e84
Publikováno v:
Applied optics. 5(6)
An improved method is proposed for applying the Abel integral equation to radiance data gathered from rotationally symmetric sources by side-on observation. The method involves dividing the data into a number of segments going out from the center. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e29122d349a97f85db9b3efe2f3eb56d
https://pubmed.ncbi.nlm.nih.gov/20049010
https://pubmed.ncbi.nlm.nih.gov/20049010
Publikováno v:
Journal of Heat Transfer. 105:414-418
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33e5392f12736f8c2c6ace7a1ea346ea
https://doi.org/10.1115/1.3245599
https://doi.org/10.1115/1.3245599
Autor:
A. Abdulkadir, Richard C. Birkebak
Publikováno v:
International Journal of Heat and Mass Transfer. 19:1039-1043
The theoretical prediction of the spectral directional emittance of roughened metal surfaces are presented. The direct emission is evaluated by assuming the roughened surface to have a Gaussian random distribution of surface slopes and heights. The e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ed6e8a88bbda4a4997ef49cd8a09973
https://doi.org/10.1016/0017-9310(76)90187-3
https://doi.org/10.1016/0017-9310(76)90187-3
Publikováno v:
Journal of Heat Transfer. 88:125-130
Predictions of the heat loss from animal systems under the influence of environmental air temperature using thermal modeling techniques are found to agree with available experimental results. To perform the necessary experiments on heat loss, over a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b78514fd8e7d27c168cd161c79424b7
https://doi.org/10.1115/1.3691455
https://doi.org/10.1115/1.3691455
Publikováno v:
The Moon. 3:346-351
The diurnal variation of temperatures in the lunar surface layer is calculated using the measured properties of the Apollo 12 samples. The results are compared with similar calculations made using data from the Apollo 11 samples and with previous inf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0ff36ef12b961a34b8ae93a0c662c0c
https://doi.org/10.1007/bf00561846
https://doi.org/10.1007/bf00561846
Autor:
Richard C. Birkebak
Publikováno v:
The Moon. 4:128-133
The spectral and total thermal radiation properties as a function of bulk density are presented for lunar fines from the Apollo 12 mission. The total emittance is presented as a function of temperature from 90 to 400°K and the solar reflectance (alb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56c1e4369e153a874e978285a6186f35
https://doi.org/10.1007/bf00562920
https://doi.org/10.1007/bf00562920
Publikováno v:
Ecology. 45:646-649
Solar radiation characteristics of leaves of 22 species of trees are reported. An integrating sphere radiometer was used to measure the total solar reflectances and transmittances of the upper and lower leaf surfaces. Construction details and use of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58bb784040d02cba823cdc72167264a6
https://doi.org/10.2307/1936120
https://doi.org/10.2307/1936120
Autor:
Richard C. Birkebak
Publikováno v:
AIAA Journal. 10:1064-1067
The thermal radiation properties of Apollo 11 and 12 fines (soils) are reviewed and presented as a function of wavelength, angle of illumination, and bulk density. The spectral directional reflectance is presented for wavelengths from 0.6 to 2 micron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed144789747303c2739fa997e4730410
https://doi.org/10.2514/3.50295
https://doi.org/10.2514/3.50295
Publikováno v:
International Journal of Heat and Mass Transfer. 15:1045-1055
The thermophysical properties of the fines from the Apollo 12 landing site have been determined as a function of their relevant parameters. These properties include the thermal conductivity, thermal diffusivity, directional reflectance and emittance.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55ba120570a8a0a33f5535ea2768df63
https://doi.org/10.1016/0017-9310(72)90238-4
https://doi.org/10.1016/0017-9310(72)90238-4