Aerosols influence climate by altering the global energy balance via scattering and absorbing
solar radiation (direct effects), and by their effect on the reflectance of clouds and occurrence
of precipitation (indirect ...
Because it produces 15% of the water vapour in the atmosphere, evapotranspiration is a crucial
step in the water cycle. In order to allocate water effectively, manage irrigation, assess the
effects of shifting land use ...
Plastics are the most multipurpose man made materials in the world and are generally used as water bottles, medicine package, liquid container, roof cladding, etc. Plastic has disastrous impact on our environment because ...
Climate variability is unstable, varying erratically on global, regional, and local scales. Knowledge of past climatic variability at local and regional sizes can aid in the development of adaption strategies. As a result, ...
In this study, the aim was to evaluate the contribution of rainfall and temperature variability and trend
on Lake Loggo (Hayk) size/volume change, in Ethiopia using rainfall, temperature, and a map of the
different ...
Water hyacinth (Eichhornia crassipes), is among aggressive weeds that threatens water
bodies wherever it appears. In Ethiopia this weed was first seen in Koka Lake over five
decades ago, but its aggressiveness increased ...
Biomass cookstove is a device used to convert the energy contained in the fuel into heat through
the combustion process. Cookstove smoke outlet cover is necessary to control over flow of air up
the chimney and forces ...
his study was carried out to determine the influences of different windbreak lengths
on the wind speed of the downwind side of windbreaks. The windbreaks and the wind
speed sensors were constructed from locally available ...
Among several alien weeds Water Hyacinth (Eichhornia Crassipes)(known as Emboch in
Ethiopia)is ranked as one of the world’s worst invasive weeds due to its ability to rapidly
cover the entire water surface and cause ...
Noise generally is known as unwanted sound, which can adversely impact the quality of life in
urban areas across the globe. In Dire Dawa, which is one among the major industrial cities in
Ethiopia, there are several ...
Mengistu, Berhanu; Amente, Dr. Gelana(Haramaya university, 2020-06)
Evapotranspiration is an important process in the water cycle because it is responsible for 15% of the atmosphere's water vapor. Accurate quantification of ET is crucial in water allocation, irrigation management, evaluating ...
Kemal Mussa, Aliye; Amente, (PhD) Gelana(Haramaya university, 2020-06)
One of the major losses of heat from cooking stoves is through the gap between the inner edge
of stove top and outer bottom of the pot, which is exposed to the surrounding air. In this
study, design and construction of ...
Exposure to radiations beyond acceptable limits induces unintended and undesirable effects on
human health. The dominant fraction of terrestrial radiation comes from soils and rocks. Soils are
encountered on regular bases ...
kefyalew, Yerosen; abebe, Getachew Major Advisor (PhD)(Haramaya university, 2019-11)
Malaria is one of the deadly diseases in sub-Saharan countries including Ethiopia. It is caused by Plasmodium parasite transmitted by mosquito bites. An infected female anopheles mosquito is mainly responsible for the ...
sinko, Tsegaye; amente, Gelana Major Advisor (PhD)(Haramaya university, 2019-06)
In Ethiopia a widespread degradation on the existing natural forest is causing an extensive demand for fuelwood. This study conducted a comparative analysis of between the fabrication skirt stoves with different skirts ...
yohannes, Temesgen; mengesha, Elias Major Advisor (PhD); bekele, Gashaw Co-Advisor(PhD)(Haramaya university, 2019-03)
In this thesis pion Compton scattering was studied in the frame of scalar quantum electrodynamics. Scattering matrices for electron Compton scattering was derived using Feynman rules of quantum Electrodynamics. Then this ...
The present study aims at investigating the effects of three months Psychological Skills Training (imagery) on speed and agility. The research design was employed for study is experimental design. For the purpose of the ...
chala, Meskela; amente, Gelana Major Advisor (PhD)(Haramaya university, 2019-03)
One of the major losses of heat from cooking stoves is through the body of the pot, which is exposed to the surrounding air. Design and fabrication of pot skirts was undertaken in this work to minimize the heat losses. The ...
bunse, Kebede; amente, Gelana Major Advisor (PhD)(Haramaya university, 2019-03)
The traditional three-stone fire is used in many households in rural areas of developing countries. These open fires are very inefficient at converting stored chemical energy into heat from biomass fuel needed each year ...