Fluctuations of spark-discharge spectrum emissions with nonuniform distribution of material on electrodes

1973 ◽  
Vol 19 (1) ◽  
pp. 835-837
Author(s):  
L. S. Zakharov
Keyword(s):  
Nonuniform Distribution ◽  
Spark Discharge ◽  
Discharge Spectrum

Spark Discharge over the Solid Dielectric Surface in Vacuum

2018 ◽  
Vol 7 (7) ◽  
pp. 31-36
Author(s):  
Vyacheslav I. ASYUNIN ◽  
◽  
Sergei G. DAVYDOV ◽  
Alexander N. DOLGOV ◽  
Andrei V. KORNEYEV ◽  
...  
Keyword(s):  
Dielectric Surface ◽  
Spark Discharge ◽  
Solid Dielectric

scholarly journals Detecting Heterogeneity of Substitution Along DNA and Protein Sequences

Genetics ◽  
1996 ◽  
Vol 143 (1) ◽  
pp. 589-602 ◽  
Author(s):  
Peter J E Goss ◽  
R C Lewontin
Keyword(s):  
Null Hypothesis ◽  
Nonuniform Distribution ◽  
Critical Values ◽  
Third Order ◽  
Variance Test ◽  
Data Set ◽  
Significance Level ◽  
Uniformly Most Powerful Test ◽  
Interval Lengths ◽  
Uniformly Most Powerful

Abstract Regions of differing constraint, mutation rate or recombination along a sequence of DNA or amino acids lead to a nonuniform distribution of polymorphism within species or fixed differences between species. The power of five tests to reject the null hypothesis of a uniform distribution is studied for four classes of alternate hypothesis. The tests explored are the variance of interval lengths; a modified variance test, which includes covariance between neighboring intervals; the length of the longest interval; the length of the shortest third-order interval; and a composite test. Although there is no uniformly most powerful test over the range of alternate hypotheses tested, the variance and modified variance tests usually have the highest power. Therefore, we recommend that one of these two tests be used to test departure from uniformity in all circumstances. Tables of critical values for the variance and modified variance tests are given. The critical values depend both on the number of events and the number of positions in the sequence. A computer program is available on request that calculates both the critical values for a specified number of events and number of positions as well as the significance level of a given data set.

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