Browsing by Author "Tekle, Dessalegn"

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    The Impact of Supervisory Behavior on Teachers' Satisfaction with Supervision, in Region Three Senior Secondary Schools
    (Addis Ababa University, 1997-05) Tekle, Dessalegn; Teferra, Seyoum (PhD)
    The purpose of supervisory supervision, behavior on teachers'sa the impact tisfaction wi th in Region Three Senior Secondary Schools during school year.1988-1989 to investigate of this study was intended Schools 20 zones by proportionatestratified were selected sampling from all to technique the ensure the quota of each zone in the sample.To facilitate to guide the study. were prepared coefficients reliability Senior is used. Section Secondary School of In below which all predicator qualification, variables supervisory in facilitating to analysis. Sa are satisfied supervisors X 7) percent .i n considered involved further that their ~nskills, negative a this study,techniques ofand the function of supervisors stepwise mul tiple wi th the taken variables the overall the degree of their impact is not is,the relationship is very loose predicting with regression predictor relationship ceee : that by Three of the schools. Supervisory On the whole, the four predictor the model, was Region have together behavior of variables accounted the unexplained between that teachers factors 19.2 80.8 percent which in depth by those who have the interest.ix the (X 5, X 6, for about of the total variance, whereas the remaining to be examined each many it as of their supervisors four mentioned However, and supervisors not the significant tisfaction measure.in.zn used data, education have emerged statistically the above statistically teachers is be Here, substantial Xl' in-service respect, turn may leadership classroom supervisory procedures,have in returned the indicated behavior on the overall operation significant of the and stepwise multiple this teachers average, analyze the analysis with the supervisory consequence Of were in each nearly To -test, correlation, analysis satisfaction and 40 supervisors questionnaires. frequency percentage, discussed the reliabilitytest was used, and those reliability tool. 458 teachers completed regression to rectify greater or equal to 0.75 were included in the final gathering properly were stated Based on this, two sets of questionnaires and pilot-tested tool. Split-half data he next move, 6 basic question the
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    Mapping of Crustal Thickness Variation in Southern Afar Using Gravity Survey
    (Addis Ababa Universty, 2009-06) Tekle, Dessalegn; Mammo, Tilahun (PhD)
    The Afar Depression in north eastern Ethiopia is a scientific treasure trove. It is a site of a triple junction, where three plates (the Nubian plate, the Arabian plate, and the Somalian plate) are simultaneously pulling away from each other. The powerful stresses in the crust lead to frequent earth quakes and volcanism thereby producing deep cracks and fissures in the region. These tectonic activities and the sedimentation that occurs in the area change the topography, which affects the crustal thickness. Analysis of the gravity data, obtained from the Ethiopian institute of geological survey (EIGS), constrained with seismic refraction results in the study area and the Euler deconvolution results produced here, was done to study the crustal thickness variation in the southern Afar Depression including the region between 8.80 to 110N and 39.80 to 42.70E . The Bouguer gravity, which shows the depression clearly separated from the rest of the study region by relatively higher values, is dominated by a strong regional gravity while the residual anomaly indicates elongated higher (positive) gravity values that follows a trend, which over laps with crustal extension (thinning) revealed by seismic refraction survey conducted in the area. Upward continuation results also support the idea that deeper effects influence the Bouguer gravity. Higher total horizontal gradient shows faulted structures. Particularly, this high gradient bounds the depression in the west and south east, which overlaps with the escarpment faults separating the depression from the western and south eastern plateaus. Gravity modeling using seismic refraction model and Euler deconvolution result, produced here, as constraints indicate a minimum crustal thickness of about 22.7 and 23.5 under profiles BB` and CC` respectively. The modeling also shows deep seated faults particularly under profile CC.