Now showing items 21-30 of 105
Rapid detection of human infections with fluorine-18 fluorodeoxyglucose and positron emission tomography: preliminary results
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1998-09)
The purpose of this study was to evaluate the feasibility of 2-[fluorine-18]fluoro-2-deoxy- d -glucose (FDG) and positron emission tomography (PET) for rapid detection of human infections. Eleven patients who were known ...
Non-thermal ablation of neural tissue with femtosecond laser pulses
(Springer-Verlag, 1998-01)
; for 100 fs pulses from the same laser the experimental threshold was at 1.5 J/cm 2 . Histopathological examinations and scanning electron micrographs confirm the high quality of the excisions. No sign of significant ...
Investigation of intrinsic channel characteristics of hydrogenated amorphous silicon thin-film transistors by gated-four-probe structure
(The American Institute of Physics, 1998-06-01)
We use a new hydrogenated amorphous silicon (a-Si:Ha-Si:H) device structure, the gated-four-probe a-Si:Ha-Si:H thin-film transistor (TFT), to investigate the intrinsic channel characteristics of inverted-staggered a-Si:Ha-Si:H ...
Optimal feedforward recipe adjustment for CD control in semiconductor patterning
(The American Institute of Physics, 1998-11-24)
Acceptable yields for nanofabrication will require significant improvement in CD control. One method to achieve better run-to-run CD control is through inter-process feedforward control. The potential benefits of feedforward ...
RF sensing for real-time monitoring of plasma processing
(The American Institute of Physics, 1998-11-24)
A novel sensing system based on the microwave resonance probe is compared to standard RF metrology. The system uses an antenna in the glow discharge to excite the bulk plasma at a frequency range of 30 MHz to 1 GHz. Standard ...
Channel effective mass and interfacial effects in Si and SiGe metal-oxide-semiconductor field effect transistor: A charge control model study
(The American Institute of Physics, 1998-04-15)
We present results of a numerical formalism developed to address the band structure and charge control problem in nn- and pp-type silicon and silicon-germanium metal-oxide-semiconductor field effect transistors. We focus ...
A thin target approach for portal imaging in medical accelerators
(IOP Publishing Ltd, 1998-08-01)
A new thin-target method (patent pending) is described for portal imaging with low-energy (tens of keV) photons from a medical linear accelerator operating in a special mode. Low-energy photons are usually produced in the ...
Phase-matched optical parametric conversion of ultrashort pulses in a hollow waveguide
(The American Institute of Physics, 1998-02-20)
We demonstrate for the first time nonresonant phase-matched frequency conversion of ultrashort pulses in gases. Broad-bandwidth ultrafast pulses, tunable around 270 nm, were generated from a Ti:sapphire amplifier system ...
Low-cost monochromatic microsecond flash microbeam apparatus for single-cell photolysis of rhodopsin or other photolabile pigments
(The American Institute of Physics, 1998-02)
Delivery of intense, brief flashes of monochromatic light are required in single-cell physiological experiments to photolyze cellular chromophores or pigments. In the xenon flash instrument constructed, flashes are collimated, ...
An infrared study of H8Si8O12H8Si8O12 cluster adsorption on Si(100) surfaces
(The American Institute of Physics, 1998-05-22)
Motivated by a controversy about the proper interpretation of x-ray photoelectron spectra of Si/SiO2Si/SiO2 interfaces derived from the adsorption of H8Si8O12H8Si8O12 spherosiloxane clusters on Si(100) surfaces, we have ...