Browsing by Author "Getachew, Elias"

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    Analytical Representation of Numerical Self Consistent field (SCF) Hartree-Fock Radial Wave Functions for Ions
    (Addis Ababa University, 1996-06) Getachew, Elias
    Numerical values of waw functions. calculated from Hartree-fock method. are nowadays available for many atoms and ions. Analytical forms of these functions are important in some cases. By studying Pron~"s method of representing numerical results analytically into sums of exponentials. it is shown that it is possible to apply the technique for approximating the numerically given radial part of atomic \va\'e functions into sums of exponentials analytically. for each important step in Prony's method computer program is developed. The integrated program of the Prony's method is applied to the numerical radial self consistent field (SCf) wave functions of a closed-shell Cd++ ion and the exponents and coefficients for the exponentials of the approximated analytical functions are determined, Comparison between the analytical functions and the numerical functions show good agreement for \\'a\'e functions with smaller principal quantum number value, ,\ new algorithm for approximating tabulated numerical radial SCf atomic waw functions analytically into sums of exponentials is introduced, ,\ computer program is developed for the proposed new algorithm and the technique is applied to ,Id function of cadmium ion. Cd++. and to 2s and 2p functions of floride ion .f-. Exponents and coefficients of the exponentials of the approximating functions are determined. The approximated analytical forms of the numerical radial wave functions are used to reproduce numerical values of the function. The analytical and numerical functions are found to be in good agreement. These techniques can also be applied to analytically approximate nllll1erical SCF functions of other ions
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    Irregular Migration from Ethiopia to the Middle East: The Human Security Perspective
    (Addis Ababa University, 2016-05) Getachew, Elias; Alem, Zafar(PhD)
    The process of irregular migration from Ethiopia to the Middle East via the Red Sea and The Gulf of Aden is one of the problems that endangers the human security of individuals .The process of irregular migration comprises the human security situation of individuals before their migration which is a driving force, their human security situation during the dangerous journey and in their destinations. This research stressed on political, economical and food securities of individuals. As a result, the objective of this research is to analyze and deal with the human security situation of Ethiopians in relation to irregular migration from Ethiopia to the Middle East. So as to achieve this goal, qualitative methodology was employed through collecting primary as well as secondary data. The analysis of the study shows that political, economical and food insecurities affect a number of individuals in Ethiopia. Besides, irregular migrants experienced these insecurities during their journey. In other words, they were derived out of their country by insecurities and they also risk a number of deadliest threats during their journey as well as their destination. Keyword :- Irregular migration, Human Security, Political security, Economic security, Food security