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This paper discussed a new scheme is called joint Type-II generalized progressively hybrid censoring scheme (JGPHCS-II). It assumed that the lifetime distribution of the items from the two populations follow exponential distribution. Based on the JGPHCS-II , we first consider the maximum likelihood estimators of the unknown parameters along with thier asymptotic confidence intervals. Next, we provide the Bayesian inferences of the unknown parameters under the assumptions of independent gamma priors on the scale parameters using squared error (SE) , linear-exponential (LINEX) and general entropy (GE) loss functions. Using gamma conjugate priors, the Bayes estimators are developed relative to both symmetric and asymmetric loss functions. Two numerical application based on simulated and real data sets are analyzed to discuss how the applicability of the proposed methods in real phenomenon. Finally, to examine the performance of proposed methods, a Monte Carlo simulation study, simulated example and real-life data are carried out.

In this paper sampling distributions for the maximum likelihood estimators of the Beta-Binomial model are obtained numerically using approximate random numbers from the Beta-Binomial distribution. STATGRAPHICS package is used to obtain the best fitted distributions using Chi-square and Kolmogorov-Smirnov tests.

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Having the advantages of high quality and lower amount of materials for hollow core slabs (HCS), the extrusion method is not without its drawbacks because it does not allow shear reinforcement incorporation. However, the strength of HCS against shear stresses is withstood by concrete section only and shear failure of hollow core slab occurs suddenly without large deformation. Therefore, the question is what are the structural benefits of HCS that can be attained by adding shear reinforcements?. This paper is concerned with studying the effect of the presence of shear reinforcements on enhancing the structural behavior of the HCS. An experimental study was carried out on 5 full-scale precast pre-stressed modified hollow core slabs specimens (MHCS) subjected to shear loads. Each MHCS panel is comprised of longitudinal, transverse ribs and lower thin slab layer. The spaces between the ribs and the lower concrete layer are filled with polystyrene foam blocks. The results of two specimens were compared with that obtained from a hollow core slab panel having the same dimensions, pre-stressed reinforcement concrete grade and loading scheme. Results indicated that the ultimate shear capacity, failure modes, and load deflection relationships of the proposed slabs are greatly improved by using the suggested technique.