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Investigation of reflectance of molybdenum Silicon (mo/si) multilayer thin film coating on sio 2 Substrate in the extreme ultra-violet and soft X-ray electromagnetic spectrum range Thesis

Nura Kulula; Girum Abebe; Memberu Mengesha (2023-04)

In the electromagnetic spectrum, extreme ultraviolet (EUV) and soft x-ray radiation is found between UV light and hard x-rays. Photons of this spectral region have very small absorption lengths in all kinds of material ...

Low-Lying Groud State Properties Of The Structure Of Three Odd Mass Isotopes Of Mercury (197, 201, 203hg ) Based On The Calculation Of Particle Tri-Axial Rotor Model Thesis

Habtamu, Getaye; Teklemariam, Tessema; MR. Gashaw Dejenie (2022-06)

In this work, we have calculated and plotted the low-lying state properties of the structure of three odd mass isotopes of mercury (197, 201, 203Hg) with negative and positive parity with their double and single transition ...

Excitation Function Of Alpha Induced Reaction On Isotopes Of Zinc ( 64zn, 68zn, 70zn) With Alpha Energy Below 50 Mev Thesis

Mengistu, Tessemma; Teklemariam, Tessemma; Chali, Yadeta (2022-02)

In this thesis alpha induced reactions on stable isotopes of Zinc for energies of alpha below 50MeV were studied. Experimentally measured excitation function obtained from EXFOR data source IAEA, for the isotopes 64 ...

Investigation of reflectance of molybdenum Silicon (mo/si) multilayer thin film coating on sio2 Substrate in the extreme ultra-violet and soft X-ray electromagnetic spectrum range Thesis

Nura Kulula; Girum Abebe; Memberu Mengesha (2023-04)

In the electromagnetic spectrum, extreme ultraviolet (EUV) and soft x-ray radiation is found between UV light and hard x-rays. Photons of this spectral region have very small absorption lengths in all kinds of material ...

Temperature Evolution of Neutron Stars Thesis

Tagesse, Teka; Tolu, Biressa; Abdisa, Tessema (2022-05)

Thermal evolution of neutron stars(NSs) is one of the active research areas in astrophysics. In this thesis we focused on the temperature evolution of the NSs where energy conservation and transformation, mainly derived ...

Modeling Multi-Layer Thin Films (Mltf) In The Visible Ranges Of Electromagnetic Spectrum Using Transfer Matrix Method (Tmm) Thesis

Dr. Menberu, Mengesha; Dr. Girum, Abebe; Dr. Nebiyu, Gemechu (2023-03)

Multi-layer Thin-films are the stack of layer of material ranging from fractions of a nanometer to several micrometer in thickness. Therefore the intensity of light reflected off the surface of the material and transmitted ...

Analysis of students and teachers’ misconception on heat and temperature in Borena zone in secondary School, Oromia Ethiopia Thesis

Geleta Diriba; Hagos Aragay; Fikadu Eshetu (2023-03)

The purpose of this study is to explore students and teachers' misconceptions on heat and temperature. The study administered in six secondary schools from six Woredas (Moyale, Dire, Yabello, Dillo, Miyo and Dubulk) of ...

Assessment of biogas energy production potential from Manucipality solid waste: the case of Lafto fruits and vegetable store – ‘lafto atikilt tera Thesis

Mohammed Zinab; Hagos Woldegebriel; Chali Yadata (2023-03)

This study assesses biogas energy production potential of municipal solid wastes in Lafto Atikilt Tera; on vegetable and fruits leftover in the city’s main fruits and vegetable market Lafto Atikilt Tera. The study tried ...

Assessing the adoption and effective use biogas technology: A case of Arsi Robe, Oromia,Ethiopia Thesis

Aman Beyan Sado; Solomon Nagash; Hagos Woldeghebriel (2023-04)

The adoption of the biogas technology program at the national level is a recent experience in Ethiopia. Consequently, there is limited empirical evidence concerning to both energy use and the overall impacts of the ...

Causal relationship between Sunspot numbers and geomagnetic Storms during 23 and 24 solar cycle Periods Thesis

Mesgebu Adugna; Tolu Biressa; Chali Idosa (2023-04)

The study presents the causal relationship between the sunspot numbers (SSN) and geomagnetic storms(GMSs) from 1996 to 2016, which is the span of solar cycles 23 and 24. Sunspots are regions at the surface of the sun ...

Impacts of geomagnetic storm on Capacity of electric power grid over Ethiopia Thesis

Dereje Hailu; Tolu Biressa; Chali Idosa (2023-04)

The geomagnetic storm has an impact on electrical power grid outages. The impacts of this storm on an electric power outage depend on the storm’s severity and include short-term impact, long-term impact, transformer ...

Evaluation of noise pollution in educational institutes of Addis Ketema sub city in Addis Ababa administration Thesis

Tigist Fekadu; Hagos Woldeghebriel; Nebiyu Gemechu (2023-03)

Nowadays, along with air pollution and water pollution, noise pollution also hits public life and creates problems for a normal life. The noise level should be in the range of 35 dB (A) to 55 dB (A) in and around an ...

Thermoluminescence analysis in the presence of Thermally disconnected deep traps Thesis

Bikila jaleta; Nebiyu gemechu (2022-07)

Inthisthesis,beforeweweregoingtostudytheseeffectsonthermoluminescencepeaks,the phenomenonofbothluminescenceandthermoluminescencewereexplained. Westudy theoretical methods to investigate the thermoluminescence analysis ...

Investigation of Structural, Electronic and Optical Properties of Silicon(Si) using DFT and TDDFT Thesis

Tagel, Admassu; Dr. Menberu, Mengesha; Mr. Edobus, Mosisa (2022-06)

Silicon is an indirect band gap semiconductor belonging to group III-V. It is commonly used in light emitting diodes (LED) and many optoelectronic devices fabrications. In this thesis, the structural, electronic and ...

Assessment Of Life Skills Training On Learners Self Confidence And Academic Achievement: The Case Of Jiren Secondary School In Jimma City Administration Thesis

Nejashi, Abdulwali; Getachew, Abeshu; Dinaol, Hurgessa (2022-06)

The purpose of the present research was to examine assessment of life skill training on learners’ self-confidence and academic achievement. This study was a mixed research design which was composed of a quantitative ...

Investigation of structural and electronic Properties of cobalt oxide (coo) using density Functional theory with hubbard correction Thesis

Reduwan Bedru Adem; Menberu Mengesha; Edobus Mosisa (2022-06)

Cobalt oxide (CoO) has been widely studied due to its many advantages, such as starting material for the manufacture of other chemicals and catalysts, in pigments such as color reagents and in ceramics, a ground-coat frit, ...

Glow Curve Deconvolution Analysis Of Calcium Magnesium Silicate Nanophosphor Thesis

Itiyane Legese; Nebiyu Gemechu (2022-07)

Thermoluminescence(TL) is a luminescence phenomenon of an insulator or semiconductor which can be observed when the solid is thermally stimulated. The glow curve deconvolution(GCD) is mainly used to find the individual ...

Calculation Of Total Cross Section For Different Channels Of Alpha Induced Reaction On Cadmium(106Cd, 108Cd, 114Cd) In The Energy Range Between 10mev And 60mev Thesis

Yadesa, Dabala; Teklemariam, Tesemma; Chali, Yadeta (2022-01)

In this thesis, alpha-induced reactions on Cadmium for various energy of alpha have been studied. Excitation function for four reactions of the type 106 48 Cd(α, n)109 50 Sn, 108 48 Cd(α, n)111 50 Sn, 114 48 Cd(α,2n)116 ...

Statistical Distribution Of Molecular Clouds For Star Formation In Galaxies Thesis

Tolu, Biressa; Milkessa, Gebeyehu; Takele, Eno (2022-04)

In the struggle toward an understanding of the process of star formation it is one of the most important tasks to study the initial properties of the cold and dense interstellar medium. Stars are known to form in dense ...

Investigation of thermoluminescence properties of zinc aluminate nanocrystals Thesis

Mengesha Alemayehu Adimas; Nebiyu Gemechu (2022-01)

Light emission from zinc aluminate nanocrystals have got a great attention in industries for controlling the quality of some glasses, ceramics, semiconductor products, biology and biochemistry for studding the properties( ...

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