 | Chakravarti, N.K. |
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 | Field trials for life estimation
Author : Chakravarti, N.K.
Source : Defence Science Journal ; Vol:12(1) ; 1962 ; pp 20-28
Subject : 519.2 Statistics
Keywords : Estimation ;Sampling
Abstract : Field trials for life estimation differ in essential respects from laboratory trials for the same purpose in that the psychological reactions of the users play an important role, specially when the users stand to gain by tampering with the data. The method of sampling and of estimation have been discussed, both when only complete lives are used and from truncated normal and exponential populations. |
| | Statistical appreciation of experimental data on variations in the mortalities of the mosquito culex fatigans when exposed to DDT
Author : Chakravarti, N.K.
Source : Defence Science Journal ; Vol:10(1) ; 1960 ; pp 24-31
Subject : 632.9 Pest Control
Keywords : Mortality of insect ;Culex fatigans wied exposed to DDT
Abstract : Variation in the mortality of the insect Culex Fatigans Wied when exposed to DDT have been reported by Koshi and Ranganathan, with the help of data collected every fortnight in the Defence Research Laboratory(stores), Kanpur beginning September, 1949. The statistical analysis of the analysis of the data is presented in the present paper. It appear from the analysis that over and above the significant influence of humidity and the influence, though not significant, of temperature on mortalities , there is a marked seasonal pattern exhibited by the mortalities. |
| | Minimizing Waiting Time of Jobs for Scheduling n Jobs Through m Machines
Author : Bagga, P.C.;Chakravarti, N.K.
Source : Defence Science Journal ; Vol:23(1) ; 1973 ; pp 27-32
Subject : 519.8 Operations Research
Keywords : Optimal sequence;Machines
Abstract : Studies are done in this paper to find an optimal sequence of n Jobs, which when processed through machines the total waiting time of jobs. |
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