Browsing Physics by Title

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Acute respiratory infections among under-five children from households using biomass fuel in Ethiopia: systematic review and meta-analysis

Andualem, Zewudu; Nigussie Azen, Zelalem; etal (Open Access, 2021-09-22)

Acute respiratory infections are a serious public health concern across the globe, they are, however, prominently present in Sub-Saharan Africa. In Ethiopia, different primary studies were conducted in regard to the link ...
Acute respiratory symptoms and its associated factors among mothers who have under five-years-old children in northwest, Ethiopia

Andualem1, Zewudu; etal (Open Access, 2021-09-22)

Background: Poor air quality of the household is likely to be the largest public health concern in resourceconstrained countries. Exposure to household air pollution, poor working environment, and fuel type used at household ...
Adherence towards COVID-19 mitigation measures and its associated factors among Gondar City residents: A community-based cross-sectional study in Northwest Ethiopia

Nigussie AzeneI, Zelalem; Woldemariam Merid, Mehari; Goshu Muluneh, Atalay; etal (PLOS ONE, 2021-09-22)

Coronaviruses (Cov) are a large family of viruses that cause a wide range of illnesses ranging from common cold to severe diseases [1, 2]. A novel coronavirus (nCov), also called SARS-CoV-2, is the new strain of the virus ...
Agriculture is currently one of Ethiopia's most important economic sectors. Numerous cattle, both domestic and foreign, are being raised for a variety of uses. The current state of the identification of cattle breed in Ethiopia still in manual, and only the domain experts try to identify every cattle breed type. The identification of cattle breed type are depends on the skills and experience of experts in the domain area, and this can lead to cause of error, inaccurate, time-consuming, and tedious. Therefore, it is necessary to design a Identification model that assists the selection mechanism for cattle breeds.The primary aim of this study is to develop a cattle breed identification model using a deep learning approach to identify the cattle breeds. In this study, we used 2,500 images that include different breeding of cattle namely Jersey, Holstein-Friesian, Minamir, Brown Swiss and Local. We partitioned the total image into 70% for training and 30% for testing. We applied Median, Gabor and Gaussian filter noise removal techniques to remove the noise that occurred during image acquisition. To increase the number of image, we also applied an image augmentation technique. We fed the processed image to the Cattle Breed Identification Model(CBIM), VGG16, and Resnet50. We evaluate the performance of those models individually, using the accuracy, confusion matrix, recall, f1-score, and precision in different conditions for the Median, Gaussian, and Gabor-filtered images separately.The performance results for the Cattle Breed Identification model for the Median, Gaussian, and Gabor filtered images are 93%, 91%, and 81%, respectively. We get an accuracy of 82%, 80%, and 66%, respectively, using VGG16. In addition, for the Median, Gaussian-applied, and Gabor-filtered images, the Resnet50 achieves accuracy of 64%, 52%, and 58%, respectively. Then we get the accuracy of 93%, 82%, and 64%, respectively, for the Cattle Breed Identification, VGG16, and Resnet50 on the Median-filtered images. The overall performance of the model is 93% using the Cattle Breed identification model. This identification model will play a great role while, deploy for different agriculture research institutes. It will also advantages for different researchers who interested to work in this domain area.

Worku, Tadesse (2024-09)

In this project, employing the master equation we have obtained the quantum Langevin equation and the equation of time evolution for the expectation values of the cavity mode atomic operators. With the aid of the solutions ...
Analysis of Incomplete Fusion Reactions Occurring in 16O + 159Tb Systems at Various Energies of Projectile

Shimekaw, Sewmehon (International Journal of Engineering Science and Computing (IJESC), 2020-09)

The study of incomplete Fusion in heavy ion reactions, the excitation functions for several residues produced in the system 16O +159Tb have been studied in the energy range 70-95MeV. The experimental excitation functions ...
ANALYSIS OF THE STOCHASTIC MODEL OF EPIDEMIC CORONAVIRUS DISEASE (COVID-19) TRANSMISSION WITH A DISCRETE-TIME MARKOV CHAIN (IN CASE OF GONDAR CITY

TEFERA, DESTA SYUM (2024-02-12)

Since the COVID-19 epidemic disease outbreak in China in December 2019, the worldwide spread of the disease has enormously impacted the socio-economic and political affairs of all countries and call scientific works across ...
ANALYSIS OF THE STOCHASTIC MODEL OF EPIDEMIC CORONAVIRUS DISEASE (COVID-19) TRANSMISSION WITH A DISCRETE-TIME MARKOV CHAIN (IN CASE OF GONDAR CITY)

TEFERA, DESTA SYUM (2024-12-26)

basic reproduction number, COVID-19, forward Kolmogorov equation, recovery rate, SIR model, stochastic and deterministic model, transmission rate
Anxiety and associated factors among Ethiopian health professionals at early stage of COVID-19 pandemic in Ethiopia

Dagne, Henok; Atnafu2, Asmamaw; Alemu3, , Kassahun; etal (PLOS ONE, 2021-09-22)

n late 2019, a new coronavirus disease known as COVID-19 (novel coronavirus disease 2019) was identified. As there is no any drug to treat this pandemic, the healthcare professionals are disproportionately at higher risk. ...
AN APPROACH TO ENHANCE THE EFFICIENCY OF A BROWNIAN HEAT ENGINE

Tigabu, Metages (2024-12-25)

derivation is carriedout for the efficiency at the maximum power and the maximum power at the given efficiency for shortcut-driven heat engines
AQUIFER CHARACTERIZATION IN HARD ROCK USING VERTICAL ELECTRICAL RESISTIVITY METHOD: A CASE OF MEGECH CATCHMENT, NORTHWESTERN ETHIOPIA

nuru, Seid (Seid nuru, 2020-09)

Megech plain is found near Gondar Town in Amhara regional state, Northern Ethiopia. Geographically Megech area is located at UTM(ADINDAN) 315000E-336000E and 1371000N-1399000N with an elevation of 1877 a.m.sl. The current ...
Assessment of Airborne Culturable Fungal Load in an Indoor Environment of Dormitory Rooms: The Case of University of Gondar Student’s Dormitory Rooms, Northwest Ethiopia

Andualem, Zewudu; etal (dovepers, 2021-09-22)

Pollution caused by fungal contamination on building materials contributes to poor indoor air quality. Fungi are known to cause several health-related problems, such as acute toxicity, hypersensitivity, invasive mycoses, ...
Assessment of Entrance Skin Dose for Adult Patients Undergoing Diagnostic X-Ray Examination at Gondar Referral Hospital Gondar, Ethiopia

Mesafint, Awotu (Awotu Mesafint, 2020-10)

The patient radiation dose is a very essential parameter to control the quality of the x-ray services within the hospital. Dose monitoring helps to ensure the best possible protection of the patient and gives an immediate ...
Assessment of Natural Radioactivity and the Corresponding Health Risk Level from Soil at Estie Woreda Dengolt Kebele South Gondar, Ethiopia

Abebaw, Wondie (2024-12-25)

Natural radionuclides, gamma-ray spectrometry, activity concentrations, radiological hazard parameters, soil, NaI (Tl) detector
Assessment of Radiation Dose Received from Chest X-Rays Examination for Traumatic Adult Patients, in the case of University of Gondar Comprehensive Specialized Hospital

Enyew, Adisalem (Adisalem Enyew, 2020-08)

Chest radiograph is the most common examination for many clinical conditions. Traumatic adult injuries are the result of a wide variety of blunt, penetrating and burn mechanisms. They include motor vehicle collisions, ...
Assessments of Entrance Skin Dose for Patients Undergoing Selected Diagnostic X-Ray Examinations in Gamby General And Teaching Hospital, Bahir Dar, Ethiopia

Fikad, Yismaw (24-02-23)

The result of this study for pediatric patients was higher than most published data and national diagnostic reference levels. To achieve a lower ESD per examination for a patient, the hospital should implement a quality ...
Assessments of Entrance Skin Dose for Patients Undergoing Selected Diagnostic X-Ray Examinations in Gamby General And Teaching Hospital, Bahir Dar, Ethiopia

Fikad, Yismaw (2024-12-26)

To achieve a lower ESD per examination for a patient, the hospital should implement a quality assurance program to reduce the quantity of films each exam and employ appropriate exposure factors to obtain a high-quality ...
Bayesian inversion of Electrical resistivity data at Gondar waste disposal site, Gondar, Ethiopia

Muhye, Zewdu (Zewdu Muhye, 2020-09)

This thesis presents a practical and objective procedure for a Bayesian inversion of geophysical data. Inverse problems in geophysics allow us to gauge parameters we cannot directly observe. A desire to quantify uncertainty ...
CHARACTERIZING GPS VISIBILITY AND SATELLITE-RECEIVER GEOMETRY OVER ETHIOPIA DURING 2015

Abera Nigussie, Sheleme (2024-12-25)

GPS satellite visibility over Ethiopia, characterizing satellite –receiver geometry, Addis Ababa GPS station
Chemical Potential of an Antiferromagnetic Magnon Gas

Aklilu, Hailegebrial (2024-12-25)

antiferromagnetic, chemical potential, magnon, spintronics
Coherent States for Ladder Operators of General Order Related to Exceptional Orthogonal Polynomial

Mersha, Liku (2024-12-25)

Some properties are analyzed and compared. The ladder operators and coherent states constructions presented are extended to the case of quantum

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