Results 261 to 270 of about 3,555,142 (282)

Relative spectral sensitivity distribution measurements of photoreceivers

Applied Optics, 1977
Problems related to the measurement of spectral sensitivity distribution are discussed. Special systems, an electromechanical one with servo-control and an all-electronic one using an instantaneous value measuring ratiometer, have been built and their performance tested.
G, Eppeldauer, J, Gráner, J, Schanda, U M, Vanyek   +3 more
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The relative sensitivity of different alignment methods and character codings in sensitivity analysis

Cladistics, 2008
AbstractSensitivity analysis provides a way to measure robustness of clades in sequence‐based phylogenetic analyses to variation in alignment parameters rather than measuring their branch support. We compared three different approaches to multiple sequence alignment in the context of sensitivity analysis: progressive pairwise alignment, as implemented ...
Mark P, Simmons, Kai F, Müller, Colleen T, Webb   +2 more
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Sensitivity, Specificity, and Relatives

2011
This chapter introduces several notions fundamental for disease or device testing. The sensitivity, specificity, and positive and negative predictive values of a test are measures of the performance of a diagnostic test and are intimately connected with probability calculations (estimations) and Bayes’ rule.
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On the Relative Virulence of Sensitized and Non-Sensitized Typhoid Bacilli

Journal of Infectious Diseases, 1915
In 1910 Garbat and Meyer1 published the results of an experimental study of a typhoid immune serum produced in rabbits by repeated injections of typhoid bacilli. These investigators found that rabbits, injected intravenously with killed sensitized typhoid bacilli, developed a serum of higher protective power than the rabbits injected with killed, non ...
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Measurement of Relative Spectral Sensitivity Distributions of Photoelectric Receivers

Applied Optics, 1971
An apparatus is described for the fully automatic measurement of the relative spectral sensitivity distributions of photoelectric receivers. A substitution method is used in which, after calibration of an auxiliary photomultiplier against a reference thermopile, the sample receiver is mounted in the position formerly occupied by the thermopile ...
Budde, W., Dodd, C. X.
openaire   +3 more sources

Relative Sensitivity of Pine Species to Ozone

Arboriculture & Urban Forestry, 1982
Seedlings of Pinus banksiana, P. parviflora, P. ponderosa, and P. sylvestris showed the most foliar injury to ozone fumigation at 20 and 30 pphm during an 8 hr/day, 70 day period. Pinus aristata and P. strobus showed the least injury, and were most tolerant. P. nigra, P. strobiformis, and P. thunbergii were moderately tolerant but sustained some injury.
A.M. Townsend, L.S. Dochinger
openaire   +1 more source

Relative Sensitivity of Several Plants to Diphenamid

Weed Science, 1971
The concentration of N,N-dimethyl-2,2-diphenylacetamide (diphenamid) required to cause 50% growth inhibition (I50) of the shoots or roots in soil, or the roots in a bioassay, was determined for several species. of the plants tested, grasses were the most sensitive, while Solanaceae were among the most tolerant to diphenamid.
J. Deli, G. F. Warren
openaire   +1 more source

Sensitive Pyrometer with High Relative Reproducibility

Review of Scientific Instruments, 1962
The accuracy of measurement of temperature and particularly temperature distribution in current heated wires can be considerably improved by using semiconducting light-sensitive resistors as a pyrometer. They feature almost exponential dependence of their resistivity on temperature of the hot wire and insensitivity against changes in ambient ...
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Extrafoveal Relative Red-Green Sensitivity

1985
In order to investigate opponent color channel damages in optic nerve diseases, the ranges of the red-green hue cancellation were measured for up to 10° from the fovea along the horizontal meridian on two normal observers and on a patient with optic nerve disease.
Kenji Kitahara, Ryutaro Tamaki, Hiroshi Kitahara, Jun Noji, Atsushi Kandatsu   +4 more
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Determination of the Relative Spectral Sensitivity of Phototubes*

Journal of the Optical Society of America, 1955
The determination of the relative spectral response of phototubes usually involves the calibration of the spectrum from a monochromator and subsequent exposure of the phototubes thereto. To avoid the well-known difficulties of radiometry, involving monochromators, thermocouples and/or thermopiles, galvanometers, and amplifiers, an alternative method is
openaire   +1 more source