Results 211 to 220 of about 446,134 (267)
Some of the next articles are maybe not open access.
Psychometrika, 1958
A significance test is proposed for determining whether a correlation coefficient is less than unity by an amount greater than that attributable to errors of measurement.
openaire +1 more source
A significance test is proposed for determining whether a correlation coefficient is less than unity by an amount greater than that attributable to errors of measurement.
openaire +1 more source
Annals of the New York Academy of Sciences, 1975
Parasitic protozoa and bacteria transmitted by vector insects and ticks resist destruction in the intermediate host, possibly through the possession of antigens similar to those of the host. There is no evidence that symbiotic microorganisms have evolved similar eclipsed antigens.
openaire +2 more sources
Parasitic protozoa and bacteria transmitted by vector insects and ticks resist destruction in the intermediate host, possibly through the possession of antigens similar to those of the host. There is no evidence that symbiotic microorganisms have evolved similar eclipsed antigens.
openaire +2 more sources
Attenuation and attenuationâanisotropy in laminated rocks
SEG Technical Program Expanded Abstracts 2009, 2009Summary Elastic contrast in porous rock with fluid leads to irreversible seismic energy loss. This occurs in laminated intervals with individual layers much smaller than the seismic wavelength, even if the intrinsic attenuation in each single layer is zero.
Kaushik Bandyopadhyay +2 more
openaire +1 more source
Double step attenuation measurement technique for high attenuation of variable attenuators
2012 Conference on Precision electromagnetic Measurements, 2012An accurate solution of a double step attenuation measurement technique with an internal gauge block for variable attenuators is presented. The solution is obtained by solving the signal flow graph of the circuit model with a small reflection coefficient (<0.1) on each I/O port. Experimental results both of low and high attenuation values show good
openaire +1 more source
A Standard Attenuator and the Precise Measurement of Attenuation
IEEE Transactions on Instrumentation and Measurement, 1964An attenuator calibration system is described consisting of a waveguide-beyond-cutoff attenuator operating at 31.25 Mc and electronic equipment designed for parallel-substitution, series-substitution, and heterodyne measurements. Radio-frequency power is supplied by a crystal-controlled signal generator, stabilized so that variations in the power ...
D. L. Hollway, F. P. Kelly
openaire +1 more source
Corrections to the attenuation constants of piston attenuators
Proceedings of the IEE - Part III: Radio and Communication Engineering, 1949The modes existing in a circular waveguide with walls of finite conductivity are investigated and expressions derived for the corrections to the attenuation constant of a piston attenuator. The correction is negligible for E-modes but may be of importance in work of the highest accuracy when H-modes are used.
openaire +1 more source
Filtering Attenuator with Electronically Tunable Attenuation
2021 IEEE MTT-S International Microwave and RF Conference (IMARC), 2021Biswajit Pal +3 more
openaire +1 more source