oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 2 )

2019 ( 189 )

2018 ( 245 )

2017 ( 248 )

Custom range...

Search Results: 1 - 10 of 191382 matches for " D. Mengesha "
All listed articles are free for downloading (OA Articles)
Page 1 /191382
Display every page Item
Web Based GIS for Tourism Development Using Effective Free and Open Source Software Case Study: Gondor Town and Its Surrounding Area, Ethiopia  [PDF]
Mengesha Endalew Zerihun
Journal of Geographic Information System (JGIS) , 2017, DOI: 10.4236/jgis.2017.91004
Abstract: Tourism in developing countries are some means of solving their economic problems and improving live standards of people and creates job opportunity for the host people in getting additional income and improve the developments of the country. The result of tourism in terms of environmental, cultural, economic and social aspects has a greater effect for Ethiopia. Gondar, the center of Ethiopian art and culture, is famous in its many Imperial castles and the design and decoration of its churches. This land of castles and churches was founded by Emperor Fasiladas in 1930s and served as tourist attraction sites all over the world. The main challenge to attract international tourists in the study area is Scarce and insufficient promotion of the tourist attraction sites, Lack of broad information based on the internet about tourism information, and lack of organized information about tourism facilities & destinations. This study tries to identify tourist attraction elements of Gondor town and its surrounding area & to identify non spatial data’s essential for touristic activities to develop & propose a web based GIS portal for the improvement of tourism activity in the town. The main target of developing a web based GIS interactive map is to promote and improve tourism industry of the area. It has been produced using free and open source software’s for fast processing, displaying, sharing, and distribution of tourism information using world wide web. For the web services PHP, HTML script language and QGIS2leaflet plugins are used in the development of web GIS portal.
Study on the seroprevalence of small ruminant brucellosis in and around Bahir Dar, North West Ethiopia
Y Ferede, D Mengesha, G Mekonen, M H/melekot
Ethiopian Veterinary Journal , 2011,
Abstract: A cross sectional study was carried out from October 2008 to April 2009 to determine the sero-prevalence of brucellosis in small ruminants in and around Bahir Dar, northwest Ethiopia. The sampling method used was purposive sampling technique for districts and simple random for the study animals. A total of 500 serum samples (270 from sheep and 230 from goats) were collected from extensive management system with no history of vaccination. All serum samples were initially screened by Rose-Bengal-Plate Test (RBPT) and positive reactors to RBPT (n=6) were further tested by complement fixation test (CFT) for confirmation. Accordingly, the overall prevalence of brucellosis in small ruminants was 0.4 % (2/500). Rose Bengal Plate Test detected 6 (1.2%) of the samples as seropositive. Up on further testing by CFT only 2 (0.4%) were positive which were adult goats. The seroprevalence of brucellosis was found higher in females (0.4%) than males (0%). Although seropositive animals are low in number, it was found out that animals more than 1 year of age were more affected than others. The result of the present study revealed that the seroprevalence of small ruminant brucellosis in the study area was very low. However, the existence of the disease in the study area has possible risk of spread in the future. Accordingly, elimination of positive seroreactors has been recommended to control the spread of brucellosis in these species of animals.
Stereotyping of Defects and Grading of Raw Sheep and Goat Skins Collected and Stored by Skin Traders in Bahir-Dar Town, Ethiopia
T. Zembaba,D. Mengesha,T. Negash,S. Melaku
International Journal of Animal and Veterinary Advances , 2013,
Abstract: The current cross-sectional study was conducted from September 2006 to December 2006 to assess the distribution and magnitude of major defects of sheep and goatskins collected and temporarily stored in four purposively selected skin and hide stores of Bahir Dar town, northwest Ethiopia. Thirty percent of raw sheep and goatskins collected by the traders was selected using simple random sampling method for examination of various kinds of skin defects, masses and sizes. Skins were graded according to the standard set by the Ethiopian Quality and Standard Authority. Defects caused by dirt and knife are found to be the most important defects of sheep and goatskins. The proportion of grade 1 skins in case of salted sheepskins was 29.68% while that of fresh sheepskins was 21.60% of the total samples. The proportion of grade 1 in case of fresh and salted goatskins was 23.2 and 29.63%, respectively, among the total goatskin examined. Recommendations were given so that slaughtering of sheep and goats should be done by professionals in order to reduce the defects created during flaying which are found to be among the major defects observed during examination of sheep and goatskins in the current study. In addition appropriate transportation, storage and marketing system should be in place so that the maximum benefit could be achieved from sheep and goat skins.
The impact of televised and non-televised instruction on achievement tests
YT Mengesha
Ethiopian Journal of Education and Sciences , 2011,
Abstract: The study attempted to examine and if televised mode of instruction helped students outperform in the National English Examinations than did non-televised mode of instruction in four target schools. The samples were 815 students from two televised and two non-televised high schools that are found in four different districts. The achievement test scores of the 2008 Grade Ten National English Examination of the schools were used to compare the results of the students. Interview and textbook analysis were used to collect data for the study pertaining to the way language tasks are designed in the English textbook. The National English language test scores of the sample students were analysed in SPSS version 16.0 and independent samples test score was computed. The study showed that there was no statistically significant difference between the achievement test scores of the Grade Ten National English Examination of televised and non-televised students of the target schools.
The Effect of Integrated Language Teaching on Students' Vocabulary Retention as Compared to Non-Integrated One: The Case of Grade Ten Students of Jimma University Community School.
YT Mengesha
Ethiopian Journal of Education and Sciences , 2011,
Abstract: The main objective of this study was to assess whether or not the vocabulary lessons in the Grade Ten English text are effective in enhancing students' vocabulary retention. In order to conduct the study, two grade ten sections of Jimma University Community School (JUCS) were involved as experimental and control group. Section A was taken as an experimental group and the students were offered vocabulary lessons designed by the researcher in an integrated manner taking the core vocabulary items that are included in units three and four of the grade 10 English textbook. On the other hand, Section B was used as a comparison group and students in this section were made to attend the usual vocabulary lessons and activities that appear in the student textbook. The main instruments used to collect data for the study were classroom observation, interview and vocabulary retention tests. Two tests were administered for all the students of the two sections after each unit was covered. The results of the observation were analyzed together with the results of the interview descriptively. Besides, the mean and standard deviation of the test scores were computed and analyzed. In addition an independent samples t-test was administered to see if there was a significant difference in vocabulary retention between the two groups. The study revealed that the students in the experimental group scored a significantly better result than the students in the control group in the vocabulary retention tests administered to both groups.
Thz Radiation under Tunneling in Asymmetric Double Quatum Wells  [PDF]
Menberu Mengesha, Svetlana Koshvaya, Vadim Mal’nev
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2011, DOI: 10.4236/jemaa.2011.37044
Abstract: The asymmetric parabolic double quantum wells (DQWs) with resonant levels (the ground state energy in one well co-incides with the first excited state energy in another well) is analyzed. The splitting of these levels and the tunneling times are calculated. If the typical life time of the excited state is much smaller than the tunneling time between wells, the charged particle can radiate as a result of the quantum transition from the excited state to the ground state. In the opposite case, the asymmetric DQWs can be treated as a metastable excited nanosystem regardless of that the dipole transition from the excited state to ground state is permitted. The lifetime of this metastable state can be considerably reduced by putting it into a resonant cavity. The possibility of coherent radiation of an ensemble of asymmetric DQWS is discussed.
Acclimatization of in Vitro Propagated Pineapple (Ananas comosuss (L.), var. Smooth cayenne) Plantlets to ex Vitro Condition in Ethiopia  [PDF]
Ayelign Mengesha, Biruk Ayenew, Tewodros Tadesse
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.42042
Abstract: Pineapple (Ananas comosuss, var. Smooth cayenne), which is a popular tropical fruit, is propagated vegetatively. Conventional propagation alone does not provide clean and adequate planting material demanded in Ethiopia. Recently, in vitro multiplication has become a promising technique for large-scale production. However, the acclimatization to the external environment procedure impedes the efficiency, which needs carefully optimized acclimatization techniques. We report optimized acclimatization procedures following first- and second-stage hardening methods for in vitro pineapple plantlets. Primarily, Jiffy-7 peat pellet allowed growing plants vigorously and provided above 8% survival rate over soil mix. Nevertheless, in Ethiopia, soil mix is cheaper and locally accessible. The primarily acclimatized plantlets are needed to be hardened further for better establishment and survival in the field. Black polybag and polysleeve pots filled with soil mix were evaluated in the greenhouse. A significant difference was obtained between pots for number of roots and substrate weight. Polybags had higher root number than polysleeves and saved about 27% of substrates per plant, which is a reduction of 25% of total transportation cost. Hence, the soil mix and polybags were found to be preferable over substrates and pots, for subsequent in vitro pineapple acclimatization.
In Vitro Screening of Cactus [Opuntia ficus-indicia (L.) Mill] Genotypes for Drought Tolerance  [PDF]
Berhan Mengesha, Firew Mekbib, Eyasu Abraha
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.713163
Abstract: Drought is one of the complex environmental factors affecting growth and yield of crops in arid and semi-arid areas of the world. In this context, this investigation was carried out to select drought tolerance cactus genotypes under in vitro condition. An experiment was carried out at Laboratory of Mekelle Agricultural Research Center, Northern Ethiopia. Six cactus pear genotypes namely, Gerao, Keyih Beles, Shenkor, Limo, Lemats Beles and Suluhna were used. Areoles were used as explants in tissue culture. The non-ionic water soluble polymer polyethylene glycol (PEG) of molecular weight 6000 was used as osmoticum to simulate water stress. In the first culture, the MS medium was supplemented with (2, 4-D (4 mg/l) and BA (0.5 mg/l) for callus induction. In all cultures MS medium was supplemented with 0, 10, 20 and 40 g/l polyethylene glycol (PEG) and was solidified with 0.8% agar and 30 g of sucrose. Significant differences were observed among the genotypes, PEG levels. In the first culture highest number of explants initiated callus on medium supplemented with no PEG but had not shown significant difference with 10 g/l PEG. At 10 g/l PEG, the callus induction frequency, callus fresh weight and plantlet regeneration were recorded highest for Suluhna (83.3%, 5.5 g and 63.3%), respectively. At 40 g/l PEG, callus induction frequency, callus fresh weight and plantlet regeneration were produced highest for Suluhna (41.7%, 2.75 g and 45%), respectively but no significant difference with Gerao, Limo and
Incidence of pneumonia and gastroenteritis among infants admitted to Orotta Referral Paediatric Hospital in Asmara, Eritrea in 2006.
E Frezghi, Y Mengesha, Y Tekle, D Tesfay, J Mufunda, A Gebremichael
Journal of the Eritrean Medical Association , 2008,
Abstract: A retrospective study based on medical records of infants admitted to the Orotta Paediatric Teaching Hospital for the whole of 2006 in order to study the morbidity and mortality rates from pneumonia and gastroenteritis among infants in Eritrea using the integrated management of childhood illnesses guidelines. The main causes of the 2537 admissions of whom nearly two thirds were males and which showed no seasonal variation were pneumonia (39.7%), gastroenteritis with no dehydration (27.1%) and severe pneumonia (19.7%). The case fatality rates were 1.6% for severe pneumonia, 2.7% for pneumonia, 3.5% for gastroenteritis, and 3.2% for those affected by pneumonia and gastroenteritis. Relatively high infant morbidity rates in this study from pneumonia and gastroenteritis is mitigated by low case fatality rates. There is urgent need to identify the factors underpinning high morbidity among infants and scale up interventions such as community IMCI.
Variability in Ethiopian coriander accessions for agronomic and quality traits
B Mengesha, G Getinetalemaw
African Crop Science Journal , 2010,
Abstract: Coriander (Coriandrum sativum L.) is an annual spice herb that belongs to the family of Umbelliferae/Apiaceae. Although Ethiopia is known as a primary diversity for coriander, the knowledge on nature and extent of variation of the indigenous germplasm is limited. Hence, to address the nature and extent of variability on agronomic and chemical traits, test trial was conducted at Kokate and Wondo Genet, Southern Ethiopia, using 49 accessions arranged in randomised complete block design in two replications during the main season of 2007/08. Data for 15 agronomic and quality traits were measured and statistically tested. In the combined analysis of variance over locations, accessions varied significantly in all the traits except for basal leaf number, plant height and fatty oil contents. The interaction between accessions and environment was significant for nine of the 15 traits. A range of seed yield (910-3099 kg ha-1), essential oil (0.25-0.85%) and fatty oil (11.11-16.53%) content was obtained. Overall, highest value of genetic coefficient of variation, broad sense heritability and genetic advance as percent of mean was obtained for longest basal leaf length, days to start 50% flowering, umbels number/plant, umbellets number/umbel, seed number/umbellets, seed number/plant, seed yield/ha and essential oil content.
Page 1 /191382
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.