Browsing by Author "Abebe, Zelalem"

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    Assessment of the Practice of Cooperative Training in Afar Regional State The case of Lucy TVET College Thesis Presented to the School of Graduate Studies Department of Business Education AAU
    (Addis Ababa University, 2011-07) Abebe, Zelalem; Mekonen, Worku (PhD)
    This study is an assessment oj cooperative training in Ajar Regional State taking Lucy TVET College as £I case in pOint. The major objective oJthe study is to explore the status oj cooperative training, the benefit and the role oj the stakeholder involved, as well as the challenge Jacing cooperative training in the region. In so doing, the sludy used both primary and secondary data. The prinlUrv data accessed Ihrough inlervielV, quesliannaires and observalion. To acquire reasonable representmion oj Ihe populalion, purposive sampling was JollolVed 10 select key inJormal7l und respondenls Fom all stakeholders such as Irainers, lrainees, guidance and councilors. management members head and supervisors oj the cooperalive training in the enterprise.l . Books and arlicles used as secondmy dafa. The da fa are bOlh qualitalive and n quantitath'" analyzed using percel7liles and presel7led by tables and descriptive approach. As the o resu/r oj I ii'] {[nalysis indicate, rhe poor management oj cooperative iraining, lack oj skilled human re su/lrce mainly guidance and counselor, shorrage oJinFasrrucwre. lack of awareness by Ihe induo/ ries. poor involvemel7l of Ihe Ircliners. enlerprises and other slakeholders in cooperal ive lruining, lack oJreadiness acadelnically, lechnically and erhically Fom Ihe Irainees, Ihe poor r.:lclliull/parrnersilip oj Ihe college willi Ihe induslries"coll1panies are rhe major challenge.1 u/cooperalive rraining ill Ihe region. I-{ellce, Ihe sllidy recommend Ihal an eJJorl has ro be made li'(l1I1 Ihe managemel7l oj Lllcy TVET college and olher concerned bodies 10 address shorrage () f human and malerial resources needed for Ihe Iraining. These slakeholders also should exerr Ihe ir eJJorrs 10 involve slakeholders lI1ainly enlelprises/ indllslries in planning, implememillg, and assess ing oJcooperalive Iraining. {n so doing, Ihe college has 10 creale slages lor discussion and awareness cremion on Ihe issues 0/ coopermive lraining. The emelprises involved ill Ihe coopermive It'dining also have 10 work II'ilh Ihe college 10 improve Ihe () cooperalh '~ lraining service Ihey are delivering. This is oIV ing 10 Ihe Jaci Ihal Ihrough Ihe parlnership of slake holders all chal/enges and problems Jacing cooperalive Iraining can be well managed
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    Strongly Magnetized two Dimensional Electron Gas with Account of Confinement and Pair Interaction of Electrons
    (Addis Ababa University, 2011-06) Abebe, Zelalem; Vadium, Mal'nev (Professor)
    During the past decade two-dimensional electron systems at low temperatuer and high magnetic eld have repeatedly surprised with exotic electron correlation phenomena. The quantum liquids of the fractional quantum Hall e ect (FQHE), the still enigmatic electron crystal at very low lling factors, and vanishing and reappearance of certain quantum Hall states in double layer electron systems all re ect the dominance of electron-electron interaction at very high magnetic elds. Recently the nature of the electronic interaction at the half- lled Landau levels has received much attention. The magnetization of twodimensional electron gases at low temperatures and in a strong magnetic eld B oriented normal to the plane of the electron motion was calculated along the same lines as in the work of Landau. With in two-dimensional electron system new surprises arise year after year, exotic states of electronic matter, new materials with fascinating quantum Hall properties keep triggering an intense activity in the eld. Two-dimensional electron gases with crossing energy levels can be realized in a variety of systems with di erent relative sizes of orbital and spin e ects, Coulomb energy, and di erent coupling between the components. Their study has lead to the discovery of many correlated Quantum Hall states and much e ort is put into unravelling the energy-level structure of these systems. In this work we have four parts. The rst part contens Two-Dimensional Electron gas, Quantum Con nement and Density of States, Potential wells in Semiconductors, Con nement of Electrons, E ect of Quantum Con nement on Electrons, Semiconductors Nanostructures with Con ned Electrons and Properties and Applications of Con ned Electron Gases. The second part includes Landau Levels and Landau Level degeneracy. The third part is about Classical and Quantum Hall e ect. Finally the forth part presents two charged particles in a magnetic eld and Parabolic con nement in strong magnetic eld. Here we see charged particle in weak magnetic eld and how the particle is confi ned