A discussion on orbital analysis - Comparison of air densities obtained from orbital decay and instruments

1967 ◽  
Vol 262 (1124) ◽  
pp. 172-184 ◽  
Keyword(s):  
Upper Atmosphere ◽  
Absolute Accuracy ◽  
Air Density ◽  
Orbital Decay ◽  
Atmosphere Density ◽  
The Absolute ◽  
The Difference ◽  
Orbital Analysis

Methods for determining upper-atmosphere density are briefly reviewed. Values of air density derived from orbital decay are compared with those obtained from instruments and shown to be systematically higher. The difference is too large to be due entirely to errors in the drag-derived values and cannot be explained at present if the absolute accuracy claimed for the gauges is realistic.

scholarly journals On the Establishment of Internally Consistent Abundance-Oscillator Strength Scales

1980 ◽  
Vol 51 ◽  
pp. 296-296
Author(s):  
E.A. Gurtovenko ◽  
R.I. Kostik
Keyword(s):  
Oscillator Strength ◽  
Systematic Errors ◽  
Oscillator Strengths ◽  
Absolute Accuracy ◽  
Excitation Potential ◽  
The Absolute ◽  
The Difference ◽  
Comparison Of The Results ◽  
True Values

AbstractThe method of establishing of internally consistent abundance-oscillator strength scales by using solar fraunhofer lines is elaborated and investigated.The error of internal accuracy should not exceed 0.05 - 0.06 dex. The absolute accuracy depends on the accuracy of “reference” gf-values.The oscillator strengths for about 800 Fe I lines are obtained. The comparison of the results for 19 lines common in our and Blackwell et al. (1976) investigations gives the difference log gfblack - log gfauth = Δ = -0.044 ± 0.010. The accidental part of the difference actually determines the internal accuracy of the obtained oscillator strengths.The Kurucz and Peytremann (1975) oscillator strengths for Fe I lines are analysed. Large systematic errors depending on gf and excitation potential are revealed and investigated. For some lines those errors may change the true values of gf by two orders of magnitude.

Absolute and Relative Accuracy in the Retrospective Estimate of Positive and Negative Mood

2001 ◽  
Vol 17 (1) ◽  
pp. 69-77 ◽  
Author(s):  
Igor Kardum ◽  
Koraljka Tićac Daskijević
Keyword(s):  
Negative Mood ◽  
Correlation Coefficients ◽  
Positive Mood ◽  
Relative Accuracy ◽  
Specific Factor ◽  
Absolute Accuracy ◽  
Specific Factors ◽  
The Absolute ◽  
The Difference

Summary: In a research carried out on 69 subjects, we examined the absolute and relative accuracy in the retrospective estimate of positive and negative mood as well as specific factors within positive and negative mood. The absolute accuracy was defined as the difference between average daily estimates within a period of 35 to 42 days and retrospective mood estimates for the same period, which was examined one week after the end of the day-to-day estimates. The results show statistically significant differences between average daily and retrospective mood estimates, both for positive and negative mood, for all specific factors of positive mood and for sadness as a specific factor of negative mood. In all cases retrospective estimates are statistically higher in comparison to the average day-to-day estimates. The correlation coefficients, which reflect the relative accuracy, are statistically significant and high for all mood factors. The results obtained are discussed in the context of the cognitive and motivational processes that can be operative in the retrospective mood estimates and the main measurement implications of the results are indicated.

Translocation Relative to Range

Methodology ◽  
2008 ◽  
Vol 4 (3) ◽  
pp. 132-138 ◽  
Author(s):  
Michael Höfler
Keyword(s):  
Risk Difference ◽  
Binary Outcomes ◽  
Number Needed To Treat ◽  
Likert Scales ◽  
Psychological Science ◽  
The Absolute ◽  
The Difference ◽  
Variance Parameters ◽  
Standardized Index ◽  
Maximum Possible Magnitude

A standardized index for effect intensity, the translocation relative to range (TRR), is discussed. TRR is defined as the difference between the expectations of an outcome under two conditions (the absolute increment) divided by the maximum possible amount for that difference. TRR measures the shift caused by a factor relative to the maximum possible magnitude of that shift. For binary outcomes, TRR simply equals the risk difference, also known as the inverse number needed to treat. TRR ranges from –1 to 1 but is – unlike a correlation coefficient – a measure for effect intensity, because it does not rely on variance parameters in a certain population as do effect size measures (e.g., correlations, Cohen’s d). However, the use of TRR is restricted on outcomes with fixed and meaningful endpoints given, for instance, for meaningful psychological questionnaires or Likert scales. The use of TRR vs. Cohen’s d is illustrated with three examples from Psychological Science 2006 (issues 5 through 8). It is argued that, whenever TRR applies, it should complement Cohen’s d to avoid the problems related to the latter. In any case, the absolute increment should complement d.

The Issue of Sustainability in Third World Food Production (The Distinguishedl Lecture)

1992 ◽  
Vol 31 (4I) ◽  
pp. 511-534
Author(s):  
Winfried Von Urff
Keyword(s):  
Developing Countries ◽  
Population Growth ◽  
Food Production ◽  
Third World ◽  
Total Population ◽  
Absolute Number ◽  
Comprehensive Analysis ◽  
World Food ◽  
The Absolute ◽  
The Difference

In spite of the fact that food production in developing countries doubled over the last 25 years undernutrition is still widely spread. At the beginning of the eighties, according to FAO, 335 to 494 million people in developing countries suffered from serious undernutrition the difference being due to different concepts to determine undernutrition on which scientist were unable to find a consensus.) Unfortunately there is no recent comprehensive analysis of the food situation comparable to those of previous World Food Surveys but it can be taken for sure that the absolute number of undernourished has increased. According to unofficial FAO sources a figure of 870 million was estimated for 1990 (22 percent of the total population in developing countries) using the same concept that led to the figure of 494 million in 1979-81 (23 percent of the total population in developing countries) which means that most probably the number of undernourished increased at a rate slightly less than population growth.

Preliminarily study of Saturn’s upper atmosphere density by observing Cassini plunging via China’s deep space station

2020 ◽  
Vol 20 (7) ◽  
pp. 102
Author(s):  
Lue Chen ◽  
Jin-Song Ping ◽  
Xiang Liu ◽  
Na Wang ◽  
Jian-Feng Cao ◽  
...  
Keyword(s):  
Space Station ◽  
Upper Atmosphere ◽  
Deep Space ◽  
Atmosphere Density

scholarly journals II. On the electro-chemical equivalent of silver, and on the absolute electromotive force of clark cells

1883 ◽  
Vol 36 (228-231) ◽  
pp. 448-450
Keyword(s):  
Electromotive Force ◽  
British Association ◽  
General Character ◽  
Daily Work ◽  
The Absolute ◽  
The Difference

The investigations upon this subject which have been carried on by Mrs. Sidgwick and myself during the last year and a half, though not yet quite finished, are so far advanced that no doubt remains as to the general character of the results; and as these results have application in the daily work of practical electricians, it is thought desirable to communicate them without further delay. The currents are measured by balancing the attraction and repulsion of coaxal coils against known weights, as described before the British Association in 1882, a method which has fully answered the favourable expectations then expressed. To what was said on that occasion it will be sufficient for the present to add that the readings are taken by reversal of the current in the fixed coils, and the difference of weights thus found (about 1 gram) represents the double force of attraction, free from errors depending upon the connections of the suspended coil, and other sources of disturbance.

A Hybrid Neural Network Approach for Increasing the Absolute Accuracy of Industrial Robots

2021 ◽  
Author(s):  
Christian Landgraf ◽  
Kilian Ernst ◽  
Gesine Schleth ◽  
Marc Fabritius ◽  
Marco F. Huber
Keyword(s):  
Neural Network ◽  
Industrial Robots ◽  
Absolute Accuracy ◽  
Network Approach ◽  
Neural Network Approach ◽  
Hybrid Neural Network ◽  
The Absolute
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