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DESIGN OF HIGH GAIN AND LOW POWER CMOS OPERATIONAL AMPLIFIER WITH CURRENT BUFFER

Getnet, Mitiku (2019-09-23)

Abstract Due to the problem of power dissipation, electronic circuits are not fully utilized. Nowadays, the concept of low power system is one of the most indispensable criteria in several op amp applications. This ...

LOW VOLTAGE CMOS OP AMP DIFFERENTIAL INPUT/DIFFERENTIAL OUTPUT

Tigabu, Wuletaw (2019-09-23)

Abstract Low voltage and low power operational ampliﬁer design has become an increasingly interesting subject as many applications switch to portable battery powered operations. The need for design techniques to allow ...

INVESTIGATION OF A LODGED BULLET INSIDE THE BRAIN USING COMPUTER TOMOGRAPHY (CT)

Wubante, Mehari (2019-09-23)

ABSTRACT The basic aim of this thesis work is to assess and investigate the profiles of 2D and 3D structure CT scanner images of a lodged bullet inside a human brain. To determine the location of lodged bullet, the ...

THEORETICAL STUDY OF UPPER CRITICAL MAGNETIC FIELD IN CeO 1x F x BiS 2 SUPERCONDUCTOR

MEKUANENT, MOLLA (2019-09-23)

Abstract In this work theoretical investigation of upper critical magnetic eld in superconductor CeO 1x F x BiS has been made. This compound was found to undergo a transition from the normal state to the superconducting ...

INVESTIGATION OF THE EFFECT OF SIZE ON THE OPTICAL PROPERTIES OF SILVER NANOPARTICLES.

Diress, Gashu (2019-09-23)

Abstract The main objective of this thesis work is to investigate the effect of size on the optical properties of silver nanoparticles based on dielectric function by applying size corrected Drude model. The effect ...

THEORETICAL INVESTIGATION OF THE COEXISTENCE OF SUPERCONDUCTIVITY AND FERROMAGNETISM IN SUPERCONDUCTOR CeO 1x F x BiS 2

AMANU, ANDUALEM (2019-09-23)

Abstract This research work deals with the theoretical investigation of the coexistence of superconductivity and ferromagnetism in superconductor CeO (x = 0 1:0). By developing a model Hamiltonian for the system and ...

Enhancing Circular Dichroism in Stacked Gold Nanorods

Melkamu, Belayneh (2019-09-23)

COLLISIONAL RADIATIVE MODEL ON LASER PRODUCED COPPER PLASMAS EMISSION

Addisu, Alazar (2019-09-23)

Abstract In this study the experimental data’s from the Nd: YAGQ-switched nanosecond (ns) laser produced Cu plasmas at lower pressure were used. The electron density have been determined from the Stark broadening of ...

THE STUDY OF THE CORRELATION BETWEEN S4 INDEX AND SIMULATED ESF USING SAMI3 MODEL.

GETNET, TEGENIE (2019-03-20)

Abstract Getting clear signal communication, easy navigation and access of accurate posi- tioning is very challenging due to the impact of severe scintillation and its variability. Amplitude scintillation index is a ...

Temporal and Spatial Variations of Equatorial Ionization Anomaly Using SWARM Satellite Observation

Tena, Muluken (2019-03-20)

Abstract The Earth’s ionosphere is part of the upper atmosphere that consists of plasma. Plasma at the equatorial ionosphere is basically produced by photo-ionization of the thin upper atmospheric gases by ultra-violet ...

Modeling temporal dynamics of solar irradiance using neural networks

Ambelu, Tebabal (2019-03-04)

Different observations of the Sun provide a vast array of measures of solar activity, including solar irradiance, which has been used in this thesis. The Sun’s irradiance, total solar irradiance (TSI) and spectral solar ...

Effect of Solar Eclipse on Middle Atmospheric Temperature over Bahir Dar Region using SABER Satellite Data

Megertu, Abera (2019-03-04)

Solar eclipse provides a rare opportunity to study the interaction between solar irradiances with the terrestrial atmosphere. There are different types of solar eclipses such as, total solar eclipse, partial solar eclipse, ...

Theoretical study of Electronic thermal conductivity of Ni doped Bi4O4S3 Superconductor

Addis, Getachew (2018-11-29)

Abstract In this work, we use the quasiclassical theory of superconductivity to calculate the electronic contribution to thermal conductivity of Ni doped Bi4O4S3 in its normal and superconducting state. The theory is ...

Total electron content variation during 2016 over east Africa equatorial anomaly region

Getaye, Abebaw (2018-11-22)

Abstract The effect of Space weather is usually linked to disturbances in the ionosphere, which is gradient of TEC. This has significant effect especially for GPS users causing degradation in range measurements and ...

IONOSPHERIC TOTAL ELECTRON CONTENT RESPONCES FOR SOLAR PARAMETERS (EUV and F10.7) OVER ETHIOPIA DURING THE YEAR 2016

SISAY, ATALEL (2018-11-22)

Abstract The production and ionization of ionosphere and its dynamics is mainly controlled by the level of solar irradiances that is received by ionosphere. As a result ionospheric variability also follows a cyclic ...

TRAVELING IONOSPHERIC DISTURBANCE (TIDs) CHARACTERISTICS ESTIMATION FROM GPS-TEC OVER ETHIOPIAN LONGITUDINAL SECTOR

SELMAN, SHUMIYE (2018-11-09)

Abstract The focus of this thesis is to determine TIDs characteristics over Ethiopian longitudinal sector using a GPS-TEC data on July, 2013.because of few researchers have been tried to study TIDs characteristics in ...

FACTORS AFFECTING STUDENTS’ PERFORMANCE IN PHYSICS: A CASE STUDY OF GRADE 10 STUDENTS OF KELELA GENERAL SECONDARY AND PREPARATORY SCHOOL

MOHAMMED GETAHUN (2018-11-08)

This study investigates the factor affecting students’ performance in physics: a case of grade – ten students in Kelela general secondary and preparatory school. The study was conducted using a descriptive survey method. ...

INVESTIGATION OF THE POOR PERFORMANCE OF GRADE TEN STUDENTS IN PHYSICS (A CASE IN GERCHECH SECONDARY SCHOOL)

Abraraw, Hunegnaw (2018-11-07)

Abstract vii The study was conducted in Gerchech Secondary School with the objective of investigating the poor performance of grade ten students in physics. To this effect, the study tried to answer three basic ...

Theoretical Investigation of Upper Critical Magnetic Field of Nidoped Bi 4 O 4 S 3 Superconductor

BAZEZEW, ADAM (2018-11-07)

Abstract In this research work we investigated theoretically the impact of Ni-doped Bi superconductor. By making use of the Ginzburg-Landau phenomenological equation, we have demonstrated the temperature dependence ...

Theoretical study of the Coexistence of the Superconductivity and Ferromagnetism in Ce Doped Sr 1-x Ce x FBiS2 Superconductor

Fentay, Amare (2018-11-07)

Abstract This research focuses on the theoretical investigation of the possible coexistence of superconductivity and ferromagnetism in Ce doped SrFBiS Superconducting. By developing a model Hamiltonian for the given ...

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