Determination of the amount of information at the output of a digital angle converter

1995 ◽  
Vol 38 (1) ◽  
pp. 21-23
Author(s):  
V. G. Domrachev ◽  
A. B. Skripnik
Keyword(s):  
Digital Angle ◽  
Amount Of Information ◽  
Digital Angle Converter

Optoelectronic Digital Angle Converter with Weighted Channel Multiplexing

2015 ◽  
Vol 58 (10) ◽  
pp. 1127-1134 ◽  
Author(s):  
V. M. Grechishnikov ◽  
V. G. Domrachev ◽  
I. V. Retinskaya ◽  
O. V. Teryaeva
Keyword(s):  
Digital Angle ◽  
Digital Angle Converter

scholarly journals Steroid Diagnostics of 21st Century in the Light of Their New Roles and Analytical Tools

2020 ◽  
pp. S193-S203 ◽  
Author(s):  
M. DUŠKOVÁ ◽  
L. KOLÁTOROVÁ ◽  
M. ŠIMKOVÁ ◽  
M. ŠRÁMKOVÁ ◽  
M. MALÍKOVÁ ◽  
...  
Keyword(s):  
Menstrual Cycle ◽  
Steroid Hormones ◽  
21St Century ◽  
Reference Values ◽  
Current Technology ◽  
Amount Of Information ◽  
Analytical Phase ◽  
Analytical Tools ◽  
Fertile Women

The determination of steroid hormones and subsequent interpretation of results is accompanied by a range of difficulties. The amount of information that current technology can provide on the circulating concentrations of more than a hundred various steroid compounds can lead to problems with interpretation. The aim of this study is to help provide orientation in this maze of data on steroid hormones. First we focus on specific aspects arising from the pre-analytical phase of steroid determination that need to be considered when planning sampling, whether for diagnostics or research. Then, we provide a brief summary of the characteristics and diagnostic relevance of several steroid hormones and/or their metabolites: pregnenolone, 17α-hydroxy-pregnenolone, dehydroepiandrosterone, hydroxyderivatives of dehydroepiandrosterone, androstenedione, testosterone, estrone, estradiol, estriol, cortisol, cortisone, which in our institute are determined with validated LC-MS/MS methods. For these steroids, we also provide newly calculated reference values in fertile women according to the phase of their menstrual cycle.

The Treatment of Simultaneous Position Data in the Air

1952 ◽  
Vol 5 (3) ◽  
pp. 235-250
Author(s):  
J. B. Parker
Keyword(s):  
Past History ◽  
Dead Reckoning ◽  
Positional Information ◽  
Theoretical Determination ◽  
Intermediate Point ◽  
Amount Of Information ◽  
Position Data ◽  
The Dead ◽  
Positional Data

The theoretical determination of a fix from a number of simultaneous, or near simultaneous, positional data has attracted considerable attention during the last five years. A problem is presented whenever the amount of information obtained is more than sufficient to determine the fix, the most common case being when a set of three position lines is obtained. In this instance the size of the triangle of intersection can be used to estimate whether or not the position lines are likely to be consistent with each other; if they are, some central point inside the triangle is accepted as the fix. In doing this the influence of the position provided by the vessel's past history (the dead reckoning position) is ignored; once the fix is decided on, however, a comparison between the two estimates of position may be of value either in enabling a blunder to be detected or, possibly, in selecting some intermediate point as a position from which subsequent navigation should be based. Although the determination of a position from a number of data is, mathematically, a single problem whether these data include the dead reckoning estimates or not, it is usual navigational procedure to consider first the latest positional information. It is the study of this problem that is the object of this article.

Separation of analytes as a source of information

1989 ◽  
Vol 54 (7) ◽  
pp. 1770-1776 ◽  
Author(s):  
Karel Eckschlager
Keyword(s):  
Information Entropy ◽  
Analytical Procedure ◽  
Multicomponent Analysis ◽  
Field Mapping ◽  
Amount Of Information ◽  
Source Of Information

It is shown how the amount of information gained by separation and detection or determination of several components depends on the selectivity of the analytical procedure in question. The selectivity is characterized in terms of the information entropy. Rules useful in the optimization of multicomponent analysis are derived from the results of information field mapping.

Вероятностно-информационный подход к оценке достоверности результатов акустико-эмиссионного метода контроля и диагностики

2021 ◽  
pp. 37-44
Author(s):  
С.И. Буйло ◽  
Б.И. Буйло ◽  
М.И. Чебаков
Keyword(s):  
Acoustic Emission ◽  
Quantitative Determination ◽  
Reliability Assessment ◽  
Amount Of Information ◽  
Traditional Definition ◽  
Information Reliability ◽  
Definition Of

The features of quantitative determination of the reliability of the results of the acoustic emission (AE) method of control and diagnostics are considered. It is established that the traditional definition of reliability through the probability of a controlled parameter falling into a certain interval sometimes suffers from information underdeterminacy. It is shown that taking into account the probabilistic and informational aspects of the reliability assessment makes it possible to unambiguously link the concept of the reliability of the results of control and diagnostics with the amount of information obtained during the control or diagnostic operation itself. Examples of practical determination of the information reliability of the results of the AE method are given.

scholarly journals Information content in data sets: A review of methods for interrogation and model comparison

2018 ◽  
Vol 26 (3) ◽  
pp. 423-452 ◽  
Author(s):  
H. Thomas Banks ◽  
Michele L. Joyner
Keyword(s):  
Inverse Problem ◽  
Least Squares ◽  
Information Content ◽  
Model Comparison ◽  
Model Parameters ◽  
Data Sets ◽  
Environmental Sciences ◽  
Amount Of Information ◽  
Problem Formulations

AbstractIn this review we discuss methodology to ascertain the amount of information in given data sets with respect to determination of model parameters with desired levels of uncertainty. We do this in the context of least squares (ordinary, weighted, iterative reweighted weighted or “generalized”, etc.) based inverse problem formulations. The ideas are illustrated with several examples of interest in the biological and environmental sciences.

Statistical analysis of classification

1966 ◽  
Vol 24 ◽  
pp. 188-189
Author(s):  
T. J. Deeming
Keyword(s):  
Multivariate Analysis ◽  
Statistical Analysis ◽  
Classification Scheme ◽  
Analytical Procedure ◽  
Narrow Band ◽  
Scientific Research ◽  
Maximum Amount ◽  
Amount Of Information

If we make a set of measurements, such as narrow-band or multicolour photo-electric measurements, which are designed to improve a scheme of classification, and in particular if they are designed to extend the number of dimensions of classification, i.e. the number of classification parameters, then some important problems of analytical procedure arise. First, it is important not to reproduce the errors of the classification scheme which we are trying to improve. Second, when trying to extend the number of dimensions of classification we have little or nothing with which to test the validity of the new parameters.Problems similar to these have occurred in other areas of scientific research (notably psychology and education) and the branch of Statistics called Multivariate Analysis has been developed to deal with them. The techniques of this subject are largely unknown to astronomers, but, if carefully applied, they should at the very least ensure that the astronomer gets the maximum amount of information out of his data and does not waste his time looking for information which is not there. More optimistically, these techniques are potentially capable of indicating the number of classification parameters necessary and giving specific formulas for computing them, as well as pinpointing those particular measurements which are most crucial for determining the classification parameters.

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

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