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EFFECT OF ELECTRIC FIELD AND NEUTRAL WIND ON THE FORMATION OF IONOSPHERIC IRREGULARITIES OVER BAHIR DAR,ETHIOPIA

BELETE, ACHENEF (2018-11-05)

Abstract In this thesis, we study the effect of neutral wind and zonal electric field on the formation of occurrence of ionospheric irregularity using data from ground based GPS SCINDA , on the horizontal meridional wind ...

Temporal and spatial variation of ionospheric total electron content over East Africa GPS receiver network during maximum solar activity period

Tsedal, Mersha (2018-07-18)

Ionospheric Total Electron Content (TEC) is the most important parameter of ionosphere which varies with spatially and temporally such as longitudinal, latitudinal, altitudinal, solar and geo- magnetic activities. In ...

CHARACTERISTICS OF THE TROPOPAUSE-STRATOPAUSE-MESOPAUSE HEIGHT AND TEMPERATURE VARIABILITY OVER BAHIR DAR REGION (11.6 0 E) USING SABER SATELLITE DATA N, 37.3 0

CHALACHEW, LINGEREW (2018-07-18)

Abstract The height profile of atmospheric temperature data between 12 km and 100 km was obtained from SABER satellite instruments during the year 2016 and used to characterize the temporal variability of height and ...

EFFECT OF RAINFALL AND TEMPERATURE VARIABLITY ON CROP YIELDS OVER WEST GOJJAM ZONE

Abdi, Yirdew (2018-07-18)

ABSTRACT This research was investigated the effects of rainfall and temperature variability on wheat, Teff, Maize and Barley yield in west gojjam zone. The data used in this study were maximum temperature, minimum ...

THEORETICAL INVESTIGATION OF THE COEXISTENCE OF SUPERCONDUCTIVITY AND ANTIFERROMAGNETISM IN CeP t and CeRhIn 5 SUPERCONDUCTORS 2 In 7

Tamiru, Negussie (2018-07-18)

This work focuses on the theoretical investigation of the coexistence of Superconductivity and Antiferromagnetism in CeP t 2 In 7 and CeRhIn superconductors . By developing a model Hamiltonian for the systems and ...

Theoretical Investigation of High Temperature Superconductivity in Two-Band Model for the Iron-Based Superconductor BaFe 2 (As 1{x P x ) 2

Tsadik, Kidanemariam (2018-07-18)

Abstract In this PhD research work, we have theoretically investigated the nature of high-temperature superconductivity in two-band (electron and hole) model for the isovalent-doped ironbased superconductor BaFe 2 ( ...

MESOSPHERIC TEMPERATURE INVERSION OVER BAHIR DAR REGION (11 0 N/37 0 E), ETHIOPIA USING SABER SATELLITE DATA

SILABAT, ESHETIE (2018-07-18)

ABSTRACT The mesospheric temperature inversion over Bahir Dar is studied by using SABER satellite data in the year 2012. In this investigation a statistical analysis of the characteristics of mesospheric inversion ...

ASSESSMENT OF OUTGOING RADIATION VARIABILITY OVER SELECTED TOWNS OF AMHARA REGION, ETHIOPIA

GETANEH, WASSIE (2017-12-19)

Net radiation plays an essential role in determining the thermal conditions of the Earth’s surface and is an important parameter for the study of land-surface processes and global climate change. The estimated monthly ...

ASSESSMENTS OF NTCM MODEL AGAINST GPS RECEIVER MEASUREMENTS IN ETHIOPIAN SECTOR

Kenaw, Abay (2017-12-19)

The ionosphere causes delay of radio signals, and if not mitigated, it can be the largest source of error in GNSS positioning and navigation. The ionospheric models can be used to estimate these ionospheric errors and ...

STUDY OF TOTAL ELECTRON CONTENT AND ELECTRON DENSITY PROFILE USING COSMIC SATELLITE DATA

Andargie, Getnet (2017-12-12)

Total Electron Content (TEC) and electron density are the basic parameters, which determine the ma jor properties of the Ionosphere. This work presents the lon- gitudinal, latitudinal, and seasonal characteristics of ...

VALIDITATION OF EEF MODEL DRIFT VELOCITY USING C/NOFS SATELLITE MEASUREMENTS AT QUIET CONDITIONS OVER BAHIR DAR

Tebikew, Gashu (2017-12-12)

The equatorial ionospheric vertical ion drift velo cities (Vz) are important for the understanding of the equatorial ionospheric dynamics. In this study the equatorial electric eld and World Magnetic Models have been ...

EFFECTS OF DENSITY AND MOLECULAR WEIGHT ON SWELLING RATIO OF THERMORESPONSIVE POLYMER BRUSHES

ABEBE, MENGIST (2017-12-12)

Stimuli-polymer brushes are found all over the world around us in different forms and show progressive changes from the 15th century to the 21st century.Especially, thermo-responsive polymer brushes(PNIPAM) have so many ...

THE EFFECT OF COMPUTER SIMULATION ON STUDENTS ACHEVEMENT, ATTITUD AND GROUP INTERACTION ON SIMPLE PENDULUM (A CASE STUDY OF GRADE 12 STUDENTS AT TANA HAIK GENERAL SECONDARY AND PREPARATORY SCHOOL)

ABAY, MIHRET (2017-12-12)

This thesis presents the effect of using computer simulations instead of laboratory equipment as teaching aids. The research was carried out at Tana Haik Secondary and preparatory School on grade 12A and 12B students who ...

ASSESSMENT OF WIND POTENTIAL OVER LAKE TANA BASIN, ETHIOPIA

TSEHAYE, NEGASH (2017-10-14)

Now a days the effect of Greenhouse gas emission is the major issue around the globe because of its contribution for global warming. To reduce the effect of global warming, different scientists have been studying renewable ...

INVESTIGATING EQUATORIAL ELECTROJET IRREGULARITIES USING COHERENT BACK SCATTER RADAR OVER BAHIR DAR REGION

HABTAMU, WUBIE (2017-10-14)

Equatorial ionospheric (e.g. equatorial electro-jet, EEJ) irregularity is a nuisance for technologies that depend on trans-ionospheric propagating radio waves. Significant efforts are being carried out to understand the ...

RAINFALL VARIABILITY OVER BLUE NILE BASIN

BERHAN, TEFERI (2017-10-14)

In most of African countries whose economy is heavily depending on rain fed agriculture, so Ethiopia’s economy is mainly dependent on rain-fed agriculture, the failure or the goodness of seasonal rainfall is very important ...

EVALUATING THE INCOMING SOLAR RADIATION OVER TANA BASIN IN ETHIOPIA USING ANGSTORM-PERSCOTT AND HARGREAVES MODELS

ASNAKU, TEFERA (2017-10-14)

Renewable energy is considered to be one of the pivotal wedges that can combat global warming and stabilize the climate, through the reduction of carbon dioxide emissions. Solar energy is one of the most important renewable ...

LONGITUDINAL VARIATIONS OF PHASE SCINTILLATION DURING GEOMAGNETIC STORM

AGEGNEHU, SISAY (2017-10-14)

In this study we analysed the longitudinal variations of phase scintillation during geomagnetic storm by using VTEC,ROT &ROTI on March 16-18, June 22-23 and December 19-21/ 2015.We used GPS data of TEC for selected days ...

LATITUDINAL VARIATION OF PHASE SCINTILLATION OVER EAST AFRICA DURING GEOMAGNETIC STORM

ABEBECH, AGMAS (2017-10-14)

We present the latitudinal variation of ionospheric phase scintillation over east African sector during geomagnetic storm of the year 2015 using VTEC rapid fluctuation, ROT fluctuation and ROTI enhancement. The rate of ...

ASSESEMENT.OF STUDENTS ATTITUDE TOWARDS PHYSICS EXPERMENTAL ACTIVITIES (THE CASE OF GRADE 11 STUDENTS OF FASILEDES PREPARATORY SCHOOL, GONDAR)

Tesfahun, Tegegne (2017-08-14)

The study was conducted in Fasiledes preparatory school with the objective of , number of physics teachers' commitment to support the students in doing experimental activities; developing teachers with training and ...

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