Results 31 to 40 of about 4,616,768 (322)

Influence of Density on Sound Absorption Coefficient of Fibre Board

, 2017
For acoustic applications such as theaters, cinema halls, auditoriums the data on acoustic properties i.e. sound absorption coefficient and sound transmission loss are required to evaluate the acoustic behavior of panel products and to facilitate the ...
A. Nandanwar, M. C. Kiran, K. Varadarajulu   +2 more
semanticscholar   +1 more source

Imaging the Human Thyroid Using Three-Dimensional Diffuse Optical Tomography: A Preliminary Study

Applied Sciences, 2021
Thyroid cancer is usually diagnosed by ultrasound imaging and fine-needle aspiration biopsy. However, diagnosis of follicular thyroid carcinomas (FTC) is difficult because FTC lacks nuclear atypia and a consensus on histological interpretation.
Tetsuya Mimura, Shinpei Okawa, Hiroshi Kawaguchi, Yukari Tanikawa, Yoko Hoshi   +4 more
doaj   +1 more source

Nonadiabatic approach to dimerization gap and optical absorption coefficient of the Su-Schrieffer-Heeger model

, 2002
An analytical nonadiabatic approach has been developed to study the dimerization gap and the optical absorption coefficient of the Su-Schrieffer-Heeger model where the electrons interact with dispersive quantum phonons.
A. Takahashi, A.J. Heeger, B. Friedman, B.R. Weinberger, C.N. Yang, C.N. Yang, C.R. Fincher, C.S. Yannoni, D. Baranowski, D. Moses, D. Schmeltzer, E. Fradkin, E. Jeckelmann, G. Minton, H. Takayama, H. Zheng, H. Zheng, H. Zheng, J. Ashkanazi, J. Jiang, J. Ma, J. Solyom, J. Voit, J. Yu, J.E. Hirsch, J.M. Ginder, J.T. Gammel, K. Harigaya, K. Kim, K. Maki, K. Nasu, L.G. Caron, M. Nakahara, M.J. Rice, N. Suzuki, P. Brüesch, P.M. Grant, Q. Wang, R.H. McKenzie, R.P. McCall, S. Etemad, S. Ichinose, S. Kivelson, T. Holstein, W.K. Wu, W.P. Su, W.P. Su, W.P. Su, X.G. Wan, Y. Zou, Y. Zou, Z.B. Su   +51 more
core   +1 more source

Doping Effects and Relationship between Energy Band Gaps, Impact of Ionization Coefficient and Light Absorption Coefficient in Semiconductors

European Journal of Engineering and Technology Research
The doping process is very important in semiconductor technology that is widely used in the production of electronic devices. The effects of doping on the resistivity, mobility and energy band gap of semiconductors are significant and can greatly ...
Md. Bappi Pramanik, Md. Abdullah Al Rakib, Md. Abubakor Siddik, Shorab Bhuiyan   +3 more
semanticscholar   +1 more source

Time-dependent angularly averaged inverse transport

, 2009
This paper concerns the reconstruction of the absorption and scattering parameters in a time-dependent linear transport equation from knowledge of angularly averaged measurements performed at the boundary of a domain of interest.
Alexandre Jollivet, Bal G, Bal G, Bal G, Bal G Jollivet A, Bal G Jollivet A, Choulli M, Dautray R, Guillaume Bal, Langmore I, Romanov V G, Romanov V G, Rullgård H, Stefanov P, Stefanov P, Wang J-N   +15 more
core   +1 more source

The convolution theorem for nonlinear optics

, 2007
We have expressed the nonlinear optical absorption of a semiconductor in terms of its linear spectrum. We determined that the two-photon absorption coefficient in a strong DC-electric field of a direct gap semiconductor can be expressed as the product of
Franz W., Hernando Garcia, Keldysh L., Ramki Kalyanaraman   +3 more
core   +1 more source

Internal photoemission from quantum well heterojunction superlattices by phononless free-carrier absorption [PDF]

, 1983
The possibility of phononless free-carrier absorption in quantum well heterojunction superlattices was investigated. Order of magnitude calculation showed that the absorption coefficient was significantly enhanced over the phonon-assisted process ...
Chiu, L. C., Margalit, S., Smith, J. S., Yariv, A.   +3 more
core   +1 more source

Effect of physical properties of natural fibre on the sound absorption coefficient

, 2017
The aim of the study was to analyse the effect of physical properties of natural fibre to the sound absorption coefficient. It was also aimed to study the relation of the physical properties of natural fibre to wider the frequency range and increase the ...
N. H. Zunaidi, W. Tan, M. Majid, E. Lim
semanticscholar   +1 more source

Performance analysis of a direct-absorption parabolic trough solar collector

, 2018
A parabolic trough solar collector is a dominant technology for high-temperature industrial applications, but efficient use of a conventional surface-based parabolic trough solar collector (SBPTSC) is limited by its high radiation loss due to the high ...
Kim, Joong Bae, Lee, Bong Jae, Qin, Caiyan   +2 more
core   +1 more source

Integrating cavity based gas cells: a multibeam compensation scheme for pathlength variation [PDF]

, 2016
We present a four beam ratiometric setup for an integrating sphere based gas cell, which can correct for changes in pathlength due to sphere wall contamination.
Bergin, S., Francis, Daniel, Hodgkinson, Jane, Tatam, Ralph P.   +3 more
core   +2 more sources