Results 11 to 20 of about 1,818,392 (298)

A 530-GHz balanced mixer [PDF]

open access: yes, 1999
We report on the design and performance of a 530-GHz balanced SIS mixer, the first balanced mixer in this frequency range. This quasi-optical balanced mixer utilizes a cross-slot antenna on a hyperhemispherical substrate lens with eight superconductor ...
Chattopadhyay, Goutam   +4 more
core   +1 more source

Energy and Power Considerations in Injection and Optically Pumped Lasers [PDF]

open access: yes, 1963
The topics of power and energy output from lasers are treated. Both three- and four-level lasers are considered in the pulsed and continuous modes of operation. The theoretical power and energy estimates are compared, when possible, with experimental
Yariv, Amnon
core   +1 more source

HF Doppler radar observations of sporadic E at an Indian low latitude station, Visakhapatnam [PDF]

open access: yesAnnales Geophysicae, 2009
5.5 MHz HF Doppler radar observations of Sporadic E over an Indian low latitude station, Visakhapatnam (17.7° N, 83.3° E and Dip 20°) with 10 s resolution showed quasi-periodic variations of the echo strength and Doppler velocity ...
M. S. S. R. K. N. Sarma   +2 more
doaj   +1 more source

Space VLBI Observations Show $T_b > 10^{12} K$ in the Quasar NRAO 530 [PDF]

open access: yes, 1998
We present here space-based VLBI observations with VSOP and a southern hemisphere ground array of the gamma-ray blazar NRAO 530 at 1.6 GHz and 5 GHz. The brightness temperature of the core at 1.6 GHz is $5 \times 10^{11}$ K.
Donald C. Backer   +3 more
core   +3 more sources

Protonation Equilibria of L-Aspartic, Citric and Succinic Acids in Anionic Micellar Media

open access: yesE-Journal of Chemistry, 2009
The impact of sodium lauryl sulphate (SLS) on the protonation equilibria of L-aspartic acid, citric acid and succinic acid has been studied in various concentrations (0.5-2.5% w/v) of SLS solution maintaining an ionic strength of 0.16 mol dm-3 at 303 K ...
P. Srinivasa Rao   +4 more
doaj   +1 more source

Spatial characteristics of aerosol physical properties over the northeastern parts of peninsular India [PDF]

open access: yesAnnales Geophysicae, 2005
Measurements on aerosol spectral optical depths and near surface mass-size distributions made at several locations in the states of Andhra Pradesh, Orissa and Chattisgarh, constituting the northeastern part of the peninsular India during the ISRO-GBP ...
K. Niranjan   +5 more
doaj   +1 more source

CONVERGENCE OF INTERNATIONAL AUDIT STANDARDS AND AMERICAN AUDIT STANDARDS REGARDING SAMPLING [PDF]

open access: yesAnnals of the University of Oradea: Economic Science, 2013
: Sampling is widely used in market research, scientific analysis, market analysis, opinion polls and not least in the financial statement audit. We wonder what is actually sampling and how did it appear?
Chis Anca Oana, Danescu Tatiana, ,
doaj  

Longitudinal effects of race, ethnicity, and psychosocial disadvantage on systemic inflammation

open access: yesSSM: Population Health, 2019
Objective: Psychosocial factors likely contribute to racial and ethnic inequalities in cardiovascular diseases (CVDs). However, precise social, psychological, and physiological pathways linking race and ethnicity to the development of CVDs are not well ...
Laura B. Zahodne   +4 more
doaj   +1 more source

Balanced dynamics in the Tropics [PDF]

open access: yes, 2010
For the shallow-water equations on an equatorial beta plane, the properties of low-frequency Rossby waves and (mixed) Rossby-gravity waves are investigated.
Velde, I.R., van der, Verkley, W.T.M.
core   +3 more sources

Characteristics of VHF radiowave scintillations over a solar cycle (1983−1993) at a low-latitude station: Waltair (17.7°N, 83.3°E) [PDF]

open access: yesAnnales Geophysicae, 1997
The characteristics of VHF radiowave scintillations at 244 MHz (FLEETSAT) during a complete solar cycle (1983–93) at a low-latitude station, Waltair (17.7°N, 83.3°E), are presented.
P. V. S. Rama Rao   +5 more
doaj   +1 more source

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