College of Natural and Computational Sciences: Recent submissions

Now showing items 121-140 of 823

LEVELS AND RISK ASSESSMENTS OF POLYCYCLIC AROMATIC HYDROCARBONS IN SURFACE DUST FROM ELECTRONICS AND ELECTRICAL MATERIALS MAINTENANCE SHOPS

Thtna Mekuriya Agazh; (PhD) Meseret Amde; (PhD) Deribachew Bekana (Haramaya University, 2023-02)

Polycyclic aromatic hydrocarbons (PAHs) are toxic organic compounds causing health related risks. They can be present in, air, surface dust and soil having natural and anthropogenic sources like incomplete combustion ...
DETERMINATION OF LEVELS OF SELECTED HEAVY METALS IN RAW AND POWDER MILK PRODUCTS AVAILABLE IN HARAR CITY MARKETS, ETHIOPIA

Teshale Hunegnaw Yihune; (Ph.D.) Minbale Aschale; (Ph.D.) Deribachew Bekana (Haramaya University, 2022-07)

Milk is a white liquid produced by the mammary glands of mammals and used for different purposes especially for human as food. However, its contamination with heavy metals is a great problem for the required purpose. ...
OPTIMIZATION OF ELECTRONIC STRUCTURE AND OPTOELECTRONIC PROPERTIES OF VINYL FUSED MONOMERIC AND OLIGOMERIC BENZOTHIAZOLES–A QUANTUM CHEMICAL INVESTIGATION

Mechalu Abebe Adose; (PhD) Boobalan Maria Susai; (PhD) Endale Teju (Haramaya University, 2022-05)

Organic semiconductors are new important technologies for large-area and flexible thin-film electronics. They are deposited into electronic devices to enhance their overall performance and efficiency. Therefore, studying ...
SYNTHESIS OF BIO-INSPIRED SILVER NANOPARTICLES USING Parthenium hysterophorus LEAF EXTRACT FOR COLORIMETRIC DETECTION OF LEAD (II) IONS

Dibaba Bayana Hirpa; (PhD) Meseret Amde; (PhD) Deribachew Bekana (Haramaya University, 2022-11)

Heavy metal ions are considered as potential environmental pollutant as many of them are high capability of biomolecules toxicity even at low concentration. Lead (Pb) is one of the major heavy metal pollutants that can ...
SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL EVALUATION OF NOVEL 1, 4-DISUBSTITUTED PIPERAZINE DERIVATIVES

Teshome Fikre Bonsa; Neelaiah Babu G. (PhD); Muthu Saravanan (PhD (Haramaya University, 2022-11)

Piperazine is a heterocyclic compounds which have two nitrogen atoms at opposite positions in the six membered ring were reported to have extensive applications in various medical and industrial fields. In this study six ...
BIOGAS PRODUCTION FROM CO-DIGESTION OF COW DUNG AND BARLEY STRAW

Sharew Feyissa; (PhD) Meseret Chimdessa; (PhD) Manikandan Mathuswamy (Haramaya University, 2019-06)

Biogas can be produced from any biodegradable feedstock that is suitable for anaerobic digestion. In present day biogas production from barley straw and cow dung was investigated using the number of small reactors. ...
A COMPARATIVE STUDY FOR SOLVING FIRST ORDER LOGISTIC EQUATIONS BY USING STANDARD AND NON-STANDARD FINITE DIFFERENCE METHODS

Temesgen Osro Ayano; Temesgen Osro Ayano (Haramaya University, 2020-06)

Logistic equations are mostly used to model real life problems. However it is known that in general, these equations do not have analytic solution. For that reason, researchers have tried to solve these problems by ...
MATHEMATICAL MODELING OF TYPHOID FEVER WITH DRUG RESISTANCE COMPARTMENT

Bahmud Geleto Bedaso; (Ph.D.) Getachew Teshome; (Ph.D.) Seleshi Demie (Haramaya University, 2021-01)

In this thesis work, we formulated a deterministic mathematical model of Typhoid fever to describe the transmission dynamics of Typhoid fever and for the purpose of studying the effects of drug resistance on controlling ...
IMPLEMENTING INQUIRY BASED LEARNING TO ENHANCE GRADE 10 STUDENTS PROBLEM SOLVING SKILLS IN QUADRATIC INEQUALITIES: THE CASE OF DEGOLO PREPARATORY AND GENERAL SECONDARY SCHOOL, JAMMAWOREDA, AMHARA REGIONAL STATE

Menberu Wale; Dr. GetinetAlemayehu (PhD); Dr. GetachewTeshome (PhD) (Haramaya University, Haramaya, 2022-11)

The main purpose of this study was to investigate the implementation of inquiry based learning strategy to enhance grade 10 students’ problem solving skills inquadratic inequalities. The study was conducted in Degolo ...
CLASSIFICATION OF BARLEY SEEDS BY USING IMAGE PROCESSING TECHNIQUES

Tegen Derbie; Getachew Abebe (PhD) (Haramaya University, 2022-11)

In this research work, a digital image analysis technique was used to classify malt barley and food barley based on their color, morphological and textural features. From each sample, 50 images were captured. Three ...
ENZYME CHARACTERIZATION, ANTIOXIDANT AND ANTIMICROBIAL ACTIVITIES OF PROTEASE FROM CHICKPEA(Cicerarietinum L.) SEED AND LEAF EXTRACTS

Nigatu Wubie Ashagrie; Zekeria Yusuf (PhD); MulugetaDesta (PhD) (Haramaya University, 2022-05)

Chickpea proteins are appreciated due to their high biological values, well balanced amino acid content and low content of anti-nutritional factors. The present study was undertaken to investigate enzyme Characterization, ...
BIOGAS PRODUCTION FROM WILD OATS (Avena fatua) USING ANAEROBIC CO-DIGESTION WITH GOAT MANURE

Mulugeta Asfaw Melaku; Meseret Chimdessa (PhD); Manikandan Muthuswamy (PhD) (Haramaya University, 2022-05)

Production of biogas through anaerobic digestion of organic waste materials provides an alternative eco-friendly renewable energy source. Anaerobic digestion is a technology widely used for the treatment of organic ...
CROWDING DISTANCE BASED NON-DOMINATED SORTING GENETIC ALGORITHM II FOR MULTI-OBJECTIVE OPTIMIZATION

Fadlu Haseno Abduselam; (Ph.D.) Getinet Alemayehu; (Ph.D.) Melisew Tefera (Haramaya University, 2023-02)

Generating Pareto front of multi-objective optimization problems is a difficult task, it needs to simultaneously optimize multiple conflicting objectives. This thesis improves the crowding distance operator of the NSGA-II ...
Ethnobotanical Study of Traditional Medicinal Plants in DigelunaTijo District, Arsi Zone Oromia Regional State, Ethiopia

Feleke Kuma Kululla; Meseret Chimdessa(PhD).; Yohannes Petros (PhD (Haramaya University, 2022-12)

Ethiopia has rich flora with different plant species having use in health care system based on local indigenous knowledge. However, documented ethnobotanical information was lacking in DigelunaTijo district. Hence, the aim ...
FACTORS THAT HINDER VISUALLY AND AUDITORY IMPAIRED STUDENTS IN LEARNING MATHEMATICS OF THREE SCHOOLS OF DEBRE MARKOS TOWN

Teshome Gashaw (Haramaya University, 2020-06)

The main purpose of this thesis was to assess the factors that hinder visually and auditory impaired students in learning mathematics of the three schools of Debre Markos town. The study was conducted at three Debre Markos ...
ELECTROWEAK THEORY OF NEUTRINO SCATTERING FROM SIGMA-HYPERON: CASE OF NEUTRAL CURRENT PROCESS

Desu Belayneh Meshesha; Gashaw Bekele (PhD)_ (Haramaya University, 2022-05)

In this thesis, we have carried out the theoretical formalism of the neutrino-induced neutral current(NC) neutral Sigma-hyperon elastic scattering process. The Feynman rules, Casimir’s Trick, Trace theorems and the form ...
ON-FARM DIVERSITYASSESSMENT OF WHEAT (Triticum aestivumL.)INYEM SPECIAL WOREDA, SNNPR ETHIOPIA.

Mitiku Lemma; Dr.Meseret Chimdessa; Dr.Yohannes Petros (Haramaya University, Ethiopia, 2022-05)

The purpose of this study was to assess on farm wheat landrace/ varieties) in Yem Special Woreda. A farmer based cross-sectional descriptive study was designed to assess on farm diversity of wheat landrace in Yem special ...
THE EFFECT OF WILDLIFE ON HUMAN AGRICULTURAL ACTIVITIES AROUND ANABIE FOREST OF KALLU WOREDA, SOUTH WOLLO ZONE OF AMHARA REGION, NORTH EAST ETHIOPIA

Tilahun Melese Alemayehu; Sewnet Mengistu (PhD.); Sissay Menkir (PhD.) (Haramaya University, 2021-08)

Human-wildlife conflict (HWC) is regarded as an interaction between humans and wildlife that results in negative impacts on humans, animals, or the environment. The HWC has been a recurring problem in Ethiopia due to ...
SOME RESULTS ON GENERALIZED REVERSE DERIVATIONS ON PRIME NEAR RINGS WITH SEMIGROUP IDEALS

TADESSE YACOOB; Phool Miyan (PhD; Seleshi Demie (PhD) (Haramaya University, 2022)

The principal purpose of this thesis is to extend results from reverse derivation prime rings to generalized reverse derivations on prime near rings in the setting of semigroup ideals and discuss conditions under which ...

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