Browsing Faculty Research Publications by Title
Now showing items 1583-1602 of 2106
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QoS based scheduling for incorporating variable rate coded voice in Bluetooth
(2001)Bluetooth is an emerging standard low-cost indoor pico-cellular wireless systems. It is a master driven time division duplex (TDD) system. Real time services such as voice are given 64 kbps bandwidth in Bluetooth. However ... -
Quadrics-based matching technique for 3D object recognition
(1992)We propose a new method for the recognition of objects from range data by matching the features of the observed surfaces in the scene with the features of the model surfaces. The surfaces are represented as quadrics in ... -
Quantitative EEG analysis for assessment to ‘plan’ a task in amyotrophic lateral sclerosis patients: a study of executive functions (planning) in ALS patients
(2004)An attempt has been made to study the ability of patients with amyotrophic lateral sclerosis (ALS) to ‘plan’ a task. Electroencephalogram (EEG) data corresponding to ‘planning of a movement task’ is analyzed in comparison ... -
Quantitative reflectance haemoglobinometry
(1992)Conventional haemoglobinometry based upon optical transmission characterisation involves volumetric measurements and chemical processing in liquid media, thus making the procedures cumbersome. Reflection measurements being ... -
Quasi-static and dynamic axial compression of glass/polyester composite hemi-spherical shells
(1999)An experimental investigation has been carried out to study the collapse mechanisms and the energy absorption capacities of the glass/polyester composite hemi-spherical shells under both quasi-static and drop hammer loading. ... -
Quaternary logic circuits in 2-μm CMOS technology
(1990)Novel quaternary logic circuits, designed in 2-μm CMOS technology, are presented. These include threshold detector circuits with an improved output voltage swing and a simple binary-to-quaternary encoder circuit. Based on ... -
Queueing analysis of a mobile trunked system with mixed traffic and finite population
(1999)In trunk mobile systems, telephone lines are interfaced with the radio system at the repeaters which serve dispatch type mobile subscribers and telephone line users. We study a trunked mobile system which serves two different ... -
Radiation distortions in fast frequency-scanned antenna arrays
(1976)The pattern deterioration that occurs at high scanning speeds in frequency-scanned arrays is studied. Four major effects are observed; these are 1) fall in main beam amplitude, 2) rise in sidelobe level, 3) angular shift ... -
Radiation guiding in a plasma wave wiggler free-electron laser
(1991)The radiation guiding of a plasma wave wiggler free-electron laser (FEL) in the Compton regime was examined. It was found that a Langmuir wave supported by a plasma cylinder acts as a wiggler for the generation of ... -
Radiation hardness of polycrystalline diamond thin films irradiated with 100 MeV I7+ ions
(1997)Polycrystalline diamond thin films grown by hot-filament chemical vapour deposition (CVD) process were irradiated with 100 MeV I7+ ions. The as-deposited and irradiated films were characterized using micro-Raman spectroscopy, ... -
Radiative heat transfer across transparent honeycomb insulation materials.
(1995)A physical model is formulated to evaluate the radiative heat transfer across transparent honeycomb insulation materials. The model takes into account the refraction, reflection, absorption and scattering characteristics ... -
Raman investigation of InSe doped with GaS
(1996)The Raman spectrum of lnSe doped with GaS exhibits appreciable changes at low doping densities indicating considerable changes on introducing GaS. The photoluminescence as well as resonance Raman study shows that the exciton ... -
A raman regime free-electron laser in a partially dielectric-loaded waveguide
(1990)A partially dielectric-loaded waveguide supports modes with phase velocity νph>c/∈1/2, where ∈ is the dielectric constant of the lining. The coupling of a fast mode (with νph>c) with a slow mode (with c /∈1/2<νph<c) via a ... -
Raman scattering in resonance with yellow luminescence transitions in GaN layers grown on sapphire by molecular beam epitaxy
(2000)We have carried out defect-induced Raman scattering in resonance with yellow-luminescence (YL) transitions in GaN layers grown on sapphire by electron cyclotron resonance-molecular beam epitaxy technique. The photoluminescence ... -
Raman scattering line shapes as a probe of the order parameter symmetry in high — Tc superconductors
(1994)We present a microscopic many-body multichannel theory of interference effects between Raman scattering from phonon (discrete) and gap (continuum) pair electronic excitations in a superconductor with dy2−y2 pairing symmetry. ... -
Raman spectroscopy of polycrystalline molybdenum silicide thin films
(1997)Polycrystalline molybdenum disilicide thin films have been prepared by RF magnetron co-sputtering of molybdenum andsilicon onto P-type silicon (100) substrates and annealing thereafter using RTA technique. Raman spectroscopy ... -
Raman, photoluminescence and optical absorption studies on nanocrystalline silicon
(2002)Raman, photoluminescence (PL) and optical absorption results on silicon nanocrystals in SiO2 matrices prepared by RF sputtering method are presented. The samples have varying Si/SiO2 compositional fraction and are annealed ... -
Ranking in quadratic integer programming problems
(1996)The present paper develops an algorithm for ranking the integer feasible solutions of a quadratic integer programming (QIP) problem. A linear integer programming (LIP) problem is constructed which provides bounds on the ... -
Ranking of line outages in an AC-DC system causing overload and voltage problems
(1991)An efficient noniterative method for ranking line outage contingencies in an AC-DC system based on overload and voltage deviation performance indices is developed. The method is based on the calculation of complex line ... -
Rapid performance evaluation of journal bearings
(1997)This paper describes a rapid method for evaluating the significant design parameters such as load capacity, maximum pressure,flow, power loss, and maximum temperature in the oil film. The proposed analytical pressure ...