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Tailor, Rajesh,Parmar, Rajesh,Kim, Jong-Min,Tailor, Ritesh The Korean Statistical Society 2011 Communications for statistical applications and me Vol.18 No.2
This paper suggests two ratio-cum-product estimators of finite population mean using known coefficient of variation and co-efficient of kurtosis of auxiliary characters. The bias and mean squared error of the proposed estimators with large sample approximation are derived. It has been shown that the estimators suggested by Upadhyaya and Singh (1999) are particular case of the suggested estimators. Almost ratio-cum product estimators of suggested estimators have also been obtained using Jackknife technique given by Quenouille (1956). An empirical study is also carried out to demonstrate the performance of the suggested estimators.
A Generalized Ratio-cum-Product Estimator of Finite Population Mean in Stratified Random Sampling
Tailor, Rajesh,Sharma, Balkishan,Kim, Jong-Min The Korean Statistical Society 2011 Communications for statistical applications and me Vol.18 No.1
This paper suggests a ratio-cum product estimator of a finite population mean using information on the coefficient of variation and the fcoefficient of kurtosis of auxiliary variate in stratified random sampling. Bias and MSE expressions of the suggested estimator are derived up to the first degree of approximation. The suggested estimator has been compared with the combined ratio estimator and several other estimators considered by Kadilar and Cingi (2003). In addition, an empirical study is also provided in support of theoretical findings.
Tailor, Rajesh,Chouhan, Sunil,Kim, Jong-Min The Korean Statistical Society 2014 Communications for statistical applications and me Vol.21 No.1
This paper discusses the problem of estimation of finite population mean in double sampling for stratification. In fact, ratio and product type exponential estimators of population mean are proposed in double sampling for stratification. The biases and mean squared errors of proposed estimators are obtained upto the first degree of approximation. The proposed estimators have been compared with usual unbiased estimator, ratio and product estimators in double sampling for stratification. To judge the performance of the proposed estimators an empirical study has been carried out.
Tailor, Rajesh,Lone, Hilal A.,Pandey, Rajiv The Korean Statistical Society 2015 Communications for statistical applications and me Vol.22 No.3
This paper addressed the problem of estimation of finite population mean in double sampling for stratification. This paper proposed a generalized ratio-cum-product type estimator of population mean. The bias and mean square error of the proposed estimator has been obtained upto the first degree of approximation. A particular member of the proposed generalized estimator was identified and studied from a comparison point of view. It is observed that the identified particular estimator is more efficient than usual unbiased estimator and Ige and Tripathi (1987) estimators. An empirical study was conducted in support of the theoretical findings.
Microscopic study of zinc nanoparticles synthesised using thermosetting polymer
Giriraj Tailor,Jyoti Chaudhay,Deepshikha Verma,Bhupendra Kr. Sarma 한국현미경학회 2019 Applied microscopy Vol.49 No.6
The present study reports the novel synthesis of Zinc nanoparticles (Zn NPs) by thermal decomposition method and its characterisation by Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), and X-ray Diffraction Measurements (XRD). Synthesis of Zn NPs was achieved by using thermosetting polymer and zinc salts as precursor. Zn NPs were obtained on calcination at 850 °C for 30 min. SEM study reveals that synthesized nanoparticles are spherical in shape. XRD analysis shows that the Zn NPs formed are low crystalline in nature.
Families of Estimators of Finite Population Variance using a Random Non-Response in Survey Sampling
Singh, Housila P.,Tailor, Rajesh,Kim, Jong-Min,Singh, Sarjinder The Korean Statistical Society 2012 응용통계연구 Vol.25 No.4
In this paper, a family of estimators for the finite population variance investigated by Srivastava and Jhajj (1980) is studied under two different situations of random non-response considered by Tracy and Osahan (1994). Asymptotic expressions for the biases and mean squared errors of members of the proposed family are obtained; in addition, an asymptotic optimum estimator(AOE) is also identified. Estimators suggested by Singh and Joarder (1998) are shown to be members of the proposed family. A correction to the Singh and Joarder (1998) results is also presented.
Quantile Estimation in Successive Sampling
Housila P. Singh,Ritesh Tailor,Sarjinder Singh,김종민 한국통계학회 2007 Journal of the Korean Statistical Society Vol.36 No.4
In successive sampling on two ccasions the problem of estimating a -nite population quantile has been considered. The theory developed aimsat providing the optimum estimates by combining (i) three double sam-pling estimatorsviz.ratio-type, product-type and regression-type, from thematched portion of the sample and (ii) a simple quantile based on a randomsample from the unmatched portion of the sample on the second occasion.The approximate variance formulae of the suggested estimators have beenobtained. Optimal matching fraction is discussed. A simulation study iscarried out in order to compare the three estimators and direct estimator.It is found that the performance of the regression-type estimator is the bestamong all the estimators discussed here.
QUANTILE ESTIMATION IN SUCCESSIVE SAMPLING
Singh, Housila P.,Tailor, Ritesh,Singh, Sarjinder,Kim, Jong-Min The Korean Statistical Society 2007 Journal of the Korean Statistical Society Vol.36 No.4
In successive sampling on two occasions the problem of estimating a finite population quantile has been considered. The theory developed aims at providing the optimum estimates by combining (i) three double sampling estimators viz. ratio-type, product-type and regression-type, from the matched portion of the sample and (ii) a simple quantile based on a random sample from the unmatched portion of the sample on the second occasion. The approximate variance formulae of the suggested estimators have been obtained. Optimal matching fraction is discussed. A simulation study is carried out in order to compare the three estimators and direct estimator. It is found that the performance of the regression-type estimator is the best among all the estimators discussed here.
Georgios Kontorinis,Hiteshkumar Tailor,Margaret Gaggin,John A. Crowther 대한이비인후과학회 2019 Clinical and Experimental Otorhinolaryngology Vol.12 No.4
Objectives. To investigate the impact of labyrinthectomy and intratympanic (IT) gentamicin injections on the contralateral labyrinth, we also assessed the response of each individual semicircular canal to each IT gentamicin application. Methods. We performed a pilot observational study on tertiary, referral, academic settings. Thirteen patients with unilateral vestibular pathology were organized into two groups, group I (seven patients) receiving IT gentamicin and group II undergoing labyrinthectomy (six patients). All patients underwent six-canal video-head-impulse test in predetermined time intervals. Patients receiving gentamicin were additionally tested 3 to 5 days after every sequential injection, until all ipsilateral canals were ablated, to determine the order of response to gentamicin. We recorded the vestibular-ocular reflex gains and the presence of covert/overt saccades for each canal. Results. The posttreatment ipsilateral gains were abnormal. No patient from the gentamicin group developed abnormal contralateral responses, while patients undergoing labyrinthectomy had abnormal contralateral responses from at least one canal, even several months posttreatment. Finally, the lateral semicircular canal was the first one to be affected by IT gentamicin followed by the posterior canal: the superior canal was ablated last. Conclusion. In our study, labyrinthectomy had an impact on the responses recorded from the contralateral ear, while IT gentamicin ablated the ipsilateral labyrinthine function without affecting the contralateral responses, possibly because of a milder, more gradual impact. We also show for the first time the order that IT gentamicin application affects the semicircular canals, with the lateral being the first to be affected.
Synthesis, Characterization, and Dyeing Performance of Thiadiazole Derivatives
G. M. Malik,P. C. Patel,J. H. Tailor,S. S. Patel 한국섬유공학회 2018 Fibers and polymers Vol.19 No.8
N4-(5-methyl-1,3,4-thiadiazol-2-yl)thiazole-2,4-diamine derivatives have been synthesized by the reaction of 2- amino-5-methyl-1,3,4-thiadiazole and chloroaecetylchloride with suitable solvent, then cyclized with thiourea at reflux temperature in methanol to yield N4-(5-methyl-1,3,4-thiadiazol-2-yl)thiazole-2,4-diamine which was diazotized and coupled with various naphthalene acid couplers to give new series of acid dyes (AD1-AD13). All the compounds were characterized by their percentage yield, melting point, elemental analysis, UV spectra, IR spectra, and NMR spectra and dyeing performance on nylon fabric has been assessed.