Empirical likelihood test in a posteriori change-point nonlinear model

In this paper, in order to test whether changes have occurred in a nonlinear parametric regression, we propose a nonparametric method based on the empirical likelihood. Firstly, we test the null hypothesis of no-change against the alternative of one change in the regression parameters. Under null hypothesis, the consistency and the convergence rate of the regression parameter estimators are proved. The asymptotic distribution of the test statistic under the null hypothesis is obtained, which allows to find the asymptotic critical value. On the other hand, we prove that the proposed test statistic has the asymptotic power equal to 1. These theoretical results allows find a simple test statistic, very useful for applications. The epidemic model, a particular model with two change-points under the alternative hypothesis, is also studied. Numerical studies by Monte-Carlo simulations show the performance of the proposed test statistic, compared to an existing method in literature

Empirical likelihood test for high-dimensional two-sample model

A non parametric method based on the empirical likelihood is proposed for detecting the change in the coefficients of high-dimensional linear model where the number of model variables may increase as the sample size increases. This amounts to testing the null hypothesis of no change against the alternative of one change in the regression coefficients. Based on the theoretical asymptotic behaviour of the empirical likelihood ratio statistic, we propose, for a fixed design, a simpler test statistic, easier to use in practice. The asymptotic normality of the proposed test statistic under the null hypothesis is proved, a result which is different from the $\chi^2$ law for a model with a fixed variable number. Under alternative hypothesis, the test statistic diverges. We can then find the asymptotic confidence region for the difference of parameters of the two phases. Some Monte-Carlo simulations study the behaviour of the proposed test statistic

Conceptual Model for Communication

A variety of idealized models of communication systems exist, and all may have something in common. Starting with Shannons communication model and ending with the OSI model, this paper presents progressively more advanced forms of modeling of communication systems by tying communication models together based on the notion of flow. The basic communication process is divided into different spheres (sources, channels, and destinations), each with its own five interior stages, receiving, processing, creating, releasing, and transferring of information. The flow of information is ontologically distinguished from the flow of physical signals, accordingly, Shannons model, network based OSI models, and TCP IP are redesigned.Comment: 13 pages IEEE format, International Journal of Computer Science and Information Security, IJCSIS November 2009, ISSN 1947 5500, http://sites.google.com/site/ijcsis

‎ Engineering Sciences Vol. 3‎‏1‏‎, No. ‎‏1‏‎, 202‎‏3‏

مجلة جامعة بابل للعلوم الهندسية  Engineering Sciences&nbsp

Cement Percent Effect on the Shear and Interface Strength of Remolded Cement Treated Sand

This research aims to simulate the behavior of remolded cement treated poorly graded sand in term of shear and interface strength using the direct shear test. Different percentages of cement up to 15% by weight are added to the soil samples. Compacted cement treated soil samples are prepared at the optimum moisture content and left for 28 days in the humidity room then distributed to use them for the remolding samples preparation. The shear strength parameters for both cases soil to soil interface and concrete to soil interface are predicted, where the results show that the interface strength parameters are higher than the shear strength parameters of the remolded soil samples. The increase in cement percent increases the cohesion (C) of the treated soil, whereas the interface cohesion (Cint.) has a maximum value at 10% of added cement, and the maximum percent between cohesion (Cint.) and soil cohesion (C) is of 76.2% at 0% added cement. Moreover, the results show an increase in the interface angle of friction (δ) and a decrease in the angle of friction (φ) as the percent of cement increases. The maximum percent between interface angle (δ) and angle of friction (φ) is 63.5% at 15% of the added cement. The hardened cement in the remolded case adheres to sand grains and works as soil grains with different sizes that lead to changes in the shear properties of the soil

Series of Engineering Sciences Vol. 26, No. 7, 2018.

جدول محتويات العدد السابع لمجلد 26 لسنة 2018Table of Content, Vol. 26, No.7, 2018

‎ Engineering Sciences Vol. 30, No. ‎‏4‏‎, 2022‎

مجلة جامعة بابل للعلوم الهندسية العدد 4 مجلد 30  للسنة 2022 Engineering Sciences Vol. 30, No. 4, 202

The Impact of Mergers & Acquisitions on Bancassurance & on the Market Share of Jordanian Banks

Purpose:  The research aims to find out the impact of mergers and acquisitions between banks and insurance companies on the insurance services provided by banks.  The study was applied on a sample of Jordanian banks working to give insurance services to their public.   Theoretical framework:  The researchers reviewed related references and researches to crystalize theoretical frame work for completing this study.   Design/methodology/approach: The researchers applied the analytical descriptive approach, seven Jordanian banks working to give insurance services to their public were studied. A static panel analysis was used for the period 2008-2019.   Findings: The results of the analysis showed a positive, statistically significant impact of merger and acquisition on bancassurance, and a negative and statistically significant negative impact on the market share.   Research, Practical & Social implications: Final findings of this study supported other studies’ findings. The results showed a significant effect of merger and acquisition on bancassurance as well as a significant negative effect on the market share. This is consistent with the Jordanian reality, as the public's demand for insurance services is not at the required level.   Originality/value: This study didn't contain any part of any other published study of any other person, nor materials which has been accepted for possessing any scientific degree of any university