فيما يلي عرض لمؤلفات وأبحاثي التي نفذت إما منفردة أو بالتعاون مع باحثين آخرين، مصنفة حسب النوع

Bener, A. , Abouammoh, A. M. and  Elkahlout, G. R. (1988): Road traffic accidents in Riyadh. Journal of the Royal  Society of Health, 108, 1, 34-36. ABSTRACT

الأبحاث المنشورة في التخصص الدقيق

الأبحاث والدراسات المنشورة

Abouammoh, A. M. and Elkahlout, G. R. (1999): Tests of randomly censored samples from new better than renewal used in expectation class of life distribution, Dirasat, Pure Science 27, 2, 250-257.ABSTRACT

Abouammoh, A. M. and Elkahlout, G. R. (2000): Tests of new better than renewal used with randomly censored samples. Parishankhyan Samikha, 6, 1&2, 47-63. .ABSTRACT

Elkahlout, G.R. and Algaed, A.O. (2003): Job stress level among nurses, Umm Alqura University Journal, 15,1, 31-53. .ABSTRACT

Elkahlout, G. R. (2005): On testing statistics of harmonic mean new better than renewal used in expectation class of life distributions UmmAl-Qura Universit Journa,17,2,183-198..ABSTRACT

Elkahlout, G. R. (2006): Bayes Estimators for the Extreme-Value Reliability Function, International Journal of Computers and Mathematics with Aplications,51,673-679.ABSTRACT

Soliman, A. and Elkahlout, G. R. (2006): Bayes Estimation of the Logistic Distribution Based on Progressive Censored Samples, Journal of Applied Statistical Sciences,14,3/4,281-293..ABSTRACT
Text Box: Abouammoh, A. M. and Elkahlout, G. R. (1999): Comparing the renewal random variable with its parent in terms of convex ordering gives the new better (or worse) than renewal used aging property. Closures under reliability operations of classes of life distributions having this property are explored. Tests statistics for these aging property are established. Percentiles of the statistics are simulated and their power estimates are determined. The mean and the estimated risks of the statistics are calculated and their approach to normality is checked empirically. Text Box: Abouammoh, A. M. and Elkahlout, G. R. (2000): In this paper, the new or worse better than renewal used classes of life distributions are considered. Relations of these classes with other existing ageing criteria are presented. Closure properties under some reliability operations is studied. Test statistics of exponentiality for these classes are established under random censoring. Percentiles and the power estimates are simulated. The asymptotic normality of these tests is also tested. Text Box: Elkahlout, G.R. and Algaed, A.O. (2003): Nursing profession is considered as one of the most important occupations in health care delivery system. The present study aims to determine the effect of some demographic factors on job stress level. Those factors include age, nationality, gender, department, education level, experience and social status. This research was conducted at Riyadh Medical Complex as the biggest medical complex in Saudi Arabia. Hypothesis and literature review of the study are given. Research methodology is described. A designed questionnaire with stratified random samples is used. 236 questionnaire were collected and analyzed. Test retest correlation reliability represents 85%. The statistical techniques are correlation coefficient, Man-Whietney U-test, and Kruskal-Wallis test. The study revealed that there is no significance effect for age, gender, department, experience and marital status on the job stress level for nursing work. There are significance effects for nationality and education level. Text Box: Elkahlout, G. R. (2005): The harmonic new better or worse than renewal used in expectation classes of life distributions are considered in this paper. Relations of these classes with other existing classes of life distributions are explored and their closure properties under some reliability operations are studied. Test statistics of exponentiality for these classes are established under random censoring. Percentiles and the power estimates are simulated. The estimated risks of the statistics are calculated and the asymptotic normality of these tests is tested. Text Box: Elkahlout, G. R. (2006): Abstract–Bayes estimates under both modified symmetric and asymmetric loss functions are obtained for the reliability function of the extreme value distribution (EV1) using Lindley’s approximation procedure. These estimates are compared to each others and to maximum likelihood estimates (MLE) using simulation study. A non-informative prior ( Jeffreys invariant prior ) is used in the comparisons. The Bayes estimator under asymmetric loss function compared to the posterior mean, it incorporates additional information about possible consequences of overestimation and underestimation of the true value of the reliability function. The MLE is superior to either of the Bayes estimates, except for small values of time t the Bayes estimates consistently perform well. While the Bayes approach is computationally intensive, the calculations can be easily computerized. Text Box: Soliman, A. and Elkahlout, G. R. (2006):

Bener, A. , Abouammoh, A. M. and  Elkahlout, G. R. (1988):

Statistical Consulting, Analysis & Research 

أبحاث وتحليل واستشارات إحصائية