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MICROACOUSTIC SYSTEM ANALYSIS BY THE MEASUREMENT OF FREE-FIELD SOUND SPEED.

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[文献类型]:科技报告
[标题]:MICROACOUSTIC SYSTEM ANALYSIS BY THE MEASUREMENT OF FREE-FIELD SOUND SPEED.
[作者]:neubauer, w. g. dragonette, l. r.
[机构]:Naval Research Lab Washington D C
[关键词]:underwater sound,sound transmission,sound transmission,measurement,velocity,underwater sound,transducers,acoustic equipment,underwater sound equipment,temperature,scattering,
[出版年份]:1965
[报告号]:Rept. no. NRL-6113
[报告时间]:3Aug 64
[页码]:2p
[馆藏索取号]:AD-612094
[总页数]:16


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[唯一标识符]:CDSITC.AEROSPACE.N88-27045
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:N1988-27045; Reference AN: N88-27045
[标题]:Vertical electronic transport in novel semiconductor heterojunction structures (Abstract Onl)
[作者]:REED MARK A
[书名]:IN: Illinois Univ., Third International Conference on Superlattices, Microstructures and Microdevices p 64 (SEE N1988-26995 20-76)
[来源]:In Illinois Univ. Third International Conference on Superlattices Microstructures and Microdevices p 64 (SEE N1988 26995 20 76)
[文摘]:The investigation of vertical transport in semiconductor heterojunction systems has recently undergone a renaissance due to improved epitaxial techniques in a number of material systems. These systems are suitable for electronic spectroscopy to determine the band structure, effective masses, and space charge layers of the heterojunction systems. Investigations in a number of bandgap engineered structures, devices, and material systems are presented. For example, one of the intriguing systems investigated is a multi-component resonant tunneling structure consisting of a GaAs contact-AlGaAs barrier-InGaAs quantum well structure. In this structure, the high electron affinity of the quantum well creates a deep quantum well, in which it is demonstrated that quantum well states can be hidden from transport. The high field magnetotransport measurements of these structures yields an anomolously small effective mass of electrons tunneling through the quantum well, which is resolved by a correct modeling of the structure involving the space charge layers of the structure. Results are also presented for vertical transport in a semiconductor-semimetal system, HgCdTe/HgTe, where the physics of this heterojunction system is distinctly different from that of the now familiar GaAs/AlGaAs. Analysis of transport through various multilayer structures verifies the existence of the proposed intrinsic interface state model. (Author)
[关键词]:ELECTRON TRANSFER; HETEROJUNCTION DEVICES; SEMICONDUCTORS MATERIALS; ELECTRON TUNNELING; ENERGY GAPS SOLID STATE; QUANTUM WELLS; RESONANT TUNNELING
[出版年份]:1987
[专业领域]:SOLID STATE PHYSICS
[唯一标识符]:CDSTIC.ISTP.933673
[文献来源]:科学技术会议录索引(ISTP)
[文献类型]:科技会议
[标题]:CD8+T CELLS ARE CAPABLE OF REJECTING PANCREATIC-ISLET XENOGRAFTS
[作者]:SN YI;XM FENG;W HAWTHORNE;A PATEL;S WALTERS;PJ OCONNELL
[出版单位]:LIPPINCOTT WILLIAMS & WILKINSPHILADELPHIA
[ISSN_ISBN]:0041-1337
[会议名称]:7th World Congress of the International-Pancreas-and-Islet-Transplant-Association,SYDNEY, AUSTRALIA,August 22-25, 1999
[来源]:TRANSPLANTATION,pp 896-906
[主办单位]:Int Pancreas & Islet Transplant Assoc
[地址]:PJ OCONNELL,UNIV_SYDNEY, NATL PANCREAS TRANSPLANT UNIT, WESTMEAD HOSP, WESTMEAD, NSW 2145, AUSTRALIA
[专业领域]:TRANSPLANTATION,SURGERY,IMMUNOLOGY