The electronic and structural properties of Iron (Fe) were investigated using density functional theory (QUANTUM ESPRESSO). Iron is the main ingredient used to
make steel and the crystalline structure is body center cubic ...
The main objective of this study was to investigate the lowering of the band gap energy and optical properties of ZnO doped with alkaline earth metals (Ca 2+ , Sr 2+ , Mg 2+ ). ZnO nanoparticle was synthesize by adding ...
The main objective of this study was to investigate the lowering of the band gap energy and
optical properties of ZnO doped with alkaline earth metals (Ca2+
, Sr2+
, Mg2+). ZnO nanoparticle
viii
was synthesize by ...
ZnO nanoparticles have been synthesized by precipitation method from zinc acetate dihydrate
and sodium hydroxide. The obtained precipitated compound was calcined at 4000 C for 2 hr and
then, the obtained product was ...
The discovery of gravitational lensing made the deflection of light as an important tool for
astronomy and cosmology. Since Einstein introduced general theory of relativity for the expanding
universe, the cosmological ...
In this thesis, we study the squeezing and statistical properties of light
produced by degenerate squeezed three level laser and one mode
subharmonic generator. We first obtain, the master equation, with the aid of
the ...
In this thesis, we have analyzed the photon statistic and quadrature fluctuations of the degenerate three level laser coupled to thermal reservoir. We have found that the mean photon number of the system under consideration ...
Corn ear before harvest and during storage were infected by different fungi. The current study was aimed to evaluate the species of corn spoiling fungi that produce toxin and determination of the factors that contribute ...
Background: HIV is a major cause of illness and death in large parts of the developing
countries, especially in Africa. Accurate estimates of HIV distribution are required for
planning, implementation and evaluation of ...
Family planning services enable individuals or couples to determine freely the number and spacing of their children and to select the means by which it is achieved. Population growth in Ethiopia is not in parallel with the ...
Family planning services enable individuals or couples to determine freely the number and
spacing of their children and to select the means by which it is achieved. Population growth in
Ethiopia is not in parallel with ...
Background: Cardiovascular diseases complications are a group of disorders of the heart and
blood vessels. Globally an estimated 17.9 million peoples were died from cardiovascular disease.
This covers 31% of all global ...
Background: Low birth weight is defined as weight of child at birth less than 2500 g
measured within 24 hours of birth. It is a public health problem affecting 15%-20% of births
worldwide. Low birth weight is the cause ...
Bac;ground;Breast-feeding is a serious problem and yet it has more consequences for survival,
health, productivity and intergenerational wellbeing in sub-Saharan country including Ethiopia.
According to United National ...
Background: Cervical Cancer is a cancer arising from the cervix. The cancer recurrence
is when cancer cells are detected following the initial treatment. When there are competing
risks, techniques like traditional survival ...
Phenolic compounds are a versatile precursor to a large collection of drugs most notably aspirin, various herbicides and pharmaceuticals. However, these compounds are considered as priority pollutants since they are harmful ...
The optical properties of a semiconductor can be defined as any property that involves the interaction between electromagnetic radiation or light and the semiconductor, including absorption, diffraction, polarization, ...
Benzoic acid is one of the most commonly used food preservatives. The use of these preservatives
in food products, however, should be monitor in order to assure their safe dose for not exceed the
limit stated by regulatory ...
Caffeine is a naturally occurring alkaloid which is found in the leaves, seeds or fruits of over 63
plants species worldwide. The most common sources of caffeine are coffee, cocoa beans, cola nuts
and tea leaves. ...
Tobaccos are a commercial plant that naturally accumulates and concentrate relatively high levels of toxic heavy metals such as; cadmium (Cd) and lead (Pb) and essential elements like Zinc (Zn),Copper (Cu) and Manganese ...