Zobrazeno 21 - 30
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pro vyhledávání: '"77"'
Publikováno v:
SPIE Proceedings.
A computer aided diagnostic system has been developed to predict the status of a breast implant (intact/ruptured) based on mammographic findings. Mammograms were obtained from 112 patients who presented for surgical removal of breast implants. Findin
Autor:
Mohammed N. Afsar, Hua Chi
Publikováno v:
SPIE Proceedings.
At higher frequencies it is not easy to find a suitable material for output window applications in a high power gyrotron. The room temperature application of sapphire as a window material at higher frequencies is not feasible since its absorption coe
Publikováno v:
SPIE Proceedings.
Spectrally and temporally resolved cathodoluminescence (CL), micro-Raman spectroscopy and the investigation with a scanning force microscopy in a contact current mode (CCM-SFM) are used for characterizing the properties of diamond films. The diamond
Publikováno v:
SPIE Proceedings.
A new generation, large frame (1317 X 1035 pel) digital camera, based on the MicroImager 1400 (MI1400), has been developed. The new MicroImager 1400-12 (MI1400- 12) uses improved noise reduction circuits to allow for 12 bit digitization up to 8 Mpel/
Publikováno v:
SPIE Proceedings.
In an attempt to combine the properties of high temperature superconductors with the high thermal conductivity and low specific heat of diamond, we have explored the deposition of in- situ YBa2Cu3O7-(delta ) (YBCO) superconducting films on polycrysta
Autor:
Hue Thi-Bach Nguyen, J. Earl Rudisill
Publikováno v:
SPIE Proceedings.
Gain enhancement from IR detectors could be realized if they were antireflection (AR) coated. The feasibility of AR coating silicon surfaces over the 6 to 11 micron and 11 to 17 micron bands has been demonstrated using single and double-layer coating
Autor:
Daniel Amingual
Publikováno v:
SPIE Proceedings.
This paper introduces briefly the status of existing focal plane arrays in the world. A more detailed description of the Laboratoire Infrarouge (LIR) - SOFRADIR Technology is given. Results concerning scanned linear arrays and staring arrays are give
Publikováno v:
SPIE Proceedings.
This paper describes the results of a five-year study carried out in 38 power substations (230, 115, 34.5 and 13.8 Kv), located in the Western power electric system of CADAFE (Venezuela's national Electric Utility). A total of 154 hot spots were foun
Autor:
Ward Petrie
Publikováno v:
SPIE Proceedings.
In conducting thermal/vacuum testing on a test article that is to operate at cryogenic temperatures (below 77 K, liquid nitrogen temperature), the designer is faced with unique problems peculiar to these temperatures. Care must be taken to account fo
Autor:
John R. Doughty
Publikováno v:
SPIE Proceedings.
A Pulsed Short Wavelength Chemical Laser (SWCL) is essentially a bomb that produces coherent light. Current leading candidates have exothermicities ranging from 68 to 248 kcal/mol. The challenge to the fluid dynamicist is to tame the explosion and pr