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Search Results: 1 - 10 of 189692 matches for " G Gebru "
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The effects of Moringa stenopetala on blood parameters and histopathology of liver and kidney in mice
D Ghebreselassie, Y Mekonnen, G Gebru, W Ergete, K Huruy
Ethiopian Journal of Health Development , 2011,
Abstract: Background: Moringa stenopetala and related species are commonly used in folk medicine for various human diseases such as antimalarial, antihypertensive, antidiabetic and as antispasmodic. Objective: The aim of the study is to evaluate the effects of aqueous extract of M. stenopetala on blood parameters, and histopathology of liver and kidney in experimental mice. Methods: Fresh leaves of M. stenopetala were collected from Arbaminch area, Southwest Ethiopia, in November 2005. The leaves were dried and extracted with water. Three month-old Swiss albino male mice, which were kept under uniform laboratory conditions, were randomly divided into four groups (one group of controls and three experimental). (The control group was orally given 0.5 ml of distilled water, and groups II, III and IV were given the aqueous leaf extract of M. stenopetala using intragastric tube to achieve the required doses of 600, 750 and 900 mg/kg body weight, respectively once a day at 24 hours intervals for six weeks and then sacrificed). Blood sample was collected from each mouse and examined for hematological and biochemical parameters. Liver and kidney were removed, stained and examined for histopathological profiles. The effects of treatment with aqueous extract of M. stenopetala on hematological, biochemical and histopathology features were compared with control group following standard procedures. Results: Mice treated with 900 mg/kg of the extract per kg of body weight showed a significant increase in body weight compared to the controls (P=0.014). Neither a significant change in the weight nor in histopathology of liver and kidney were observed in the animals treated with aqueous extract of M. stenopetala compared to those of the controls. Serum glucose level (P=0.034) and serum cholesterol level (P=0.016) decreased significantly after six weeks treatment. Conclusion: The aqueous leaf extract of M. stenopetala is shown to increase body weight and reduce serum glucose and cholesterol level in mice. This indicates nutritional and medicinal values, but we cannot yet recommend its therapeutic use before more and complete studies are done.
Potential for cereal-based double cropping in bale region of Southeastern Ethiopia
DG Tanner, Z Yilma, L Zewdie, G Gebru
African Crop Science Journal , 1994,
Book Review - Communication Skills in Pharmacy Practice: A Practical Guide for Students and Practitioners
A Gebru
Ethiopian Journal of Health Sciences , 2012,
Abstract: Communication Skills in Pharmacy Practice: A Practical Guide for Students and Practitioners (5th Edition) By Wiliam N Tindall, Robert S Beardsly and Carole L Kimberlin 2011, 242 pages, Lippincott Williams & Wilkins
Molecular surveillance of mutations in the cytochrome b gene of Plasmodium falciparum in Gabon and Ethiopia
Tamirat Gebru, Asrat Hailu, Peter G Kremsner, Jürgen FJ Kun, Martin P Grobusch
Malaria Journal , 2006, DOI: 10.1186/1475-2875-5-112
Abstract: The prevalence of cytochrome b point mutations possibly conferring atovaquone resistance in Plasmodium falciparum isolates in atovaquone treatment-na?ve patient cohorts from Lambaréné, Gabon and from South Western Ethiopia was assessed.Four/40 (10%) mutant types (four different single polymorphisms, one leading to an amino acid change from M to I in a single case) in Gabonese isolates, but all 141/141 isolates were wild type in Ethiopia were found.In the absence of drug pressure, spontaneous and possibly resistance-conferring mutations are rare.The genetic complexity of Plasmodium falciparum and its ability to generate mutant variants in particular makes it a strikingly successful pathogen. Single nucleotide polymorphisms (SNPs) contribute largely to its genetic variability [1]. P. falciparum undergoes mutations in respective target genes, thus resulting in variations of the encoded proteins which facilitate escape from particular antimalarial compounds.The mitochondrion plays a functional key role in the electron transport system of the parasite [2]. By binding to the cytochrome bc1 complex of the parasite, atovaquone, which was introduced in a fixed combination with proguanil hydrochloride as an antimalarial drug in the late 1990s [3], leads to the collapse of the mitochondrial membrane potential at far lower concentrations than that at which the respective mammalian system is affected [4,5]. Its mode of action is unique in targeting parasite mitochondria selectively, thus inhibiting parasitic oxygen consumption [6] without affecting the host's mitochondrial functions [7]. In addition to electron transport inhibition, atovaquone acts through destabilization of the cytochrome bc1 complex, thus causing proton leakage to occur through this site. Proguanil enhances this destabilization [8,9].Atovaquone has been a successful drug against several eukaryotic microbial parasites [10], including Toxoplasma gondii [11] and Pneumocystis carinii (now jirovecii) [12]. However,
Agroforestry Practices and Biodiversity Management in Backyards in Hiwane, Hintalo Wejerat of Tigray, Northern Ethiopia
Tsegazeabe H. Haileselasie,Mekonen T.G/hiwot,Gebru E. Gebremichael,Solomon A. Hiluf
Asian Journal of Agricultural Sciences , 2012,
Abstract: In Ethiopia more than 85% of the population is involved in agriculture based profession. Farmers in Ethiopia have been practicing different agroforestry models since time immemorial. What is more, backyard (home garden) agroforestry practice is most popular in the northern part of the country. This backyard agroforestry (home garden) is practiced as a mixture of crops (vegetables, herbs) and trees (fruits and fodder trees) to provide diversified products to the cultivators. This study found over 40 species of plants maintained in home garden of the study area. Furthermore, agroforestry practice in backyard has a crucial role in the improvement of livelihoods to small scale farmers in the study area through direct subsistence production, indirect subsistence production (such as foods, fuel wood, fodder and shade to the cultivators) and income generation. Furthermore, it has helped to conserve many species of plants in a small areas with providing diversify needs to the farmers. We found that trees to have multiple roles in the study area where they provide significant economic and ecological benefits. Planting trees provide rural households with wood products for own consumption as well for sale and play role in decreasing soil degradation. Our findings also suggest that households consider a number of attributes in making decision to backyard agroforestry practice. These results can be used by policy makers to promote home garden agroforestry practice in the study area by creating conducive water supply and considering households’ backyard size and roofing system.
RETRACTED:Generation of Bright Squeezed Light from N Three-Level Atoms Pumped by a Coherent Light: Open Quantum System  [PDF]
Getachew A. Gebru
Journal of Quantum Information Science (JQIS) , 2016, DOI: 10.4236/jqis.2016.62011

Short Retraction Notice?

The paper does not meet the standards of \"Journal of Quantum Information Science\". This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. The aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.?

Please see the article page for more details. The full retraction notice in PDF is preceding the original paper which is marked \"RETRACTED\".

Fuzzy Set Field and Fuzzy Metric
Gebru Gebray,B. Krishna Reddy
Advances in Fuzzy Systems , 2014, DOI: 10.1155/2014/968405
Abstract: The notation of fuzzy set field is introduced. A fuzzy metric is redefined on fuzzy set field and on arbitrary fuzzy set in a field. The metric redefined is between fuzzy points and constitutes both fuzziness and crisp property of vector. In addition, a fuzzy magnitude of a fuzzy point in a field is defined. 1. Introduction Different researchers introduced the concept of fuzzy field and notion of fuzzy metric on fuzzy sets. How to define a fuzzy metric on a fuzzy set is still active research topic in fuzzy set theory which is very applicable in fuzzy optimization and pattern recognition. The notion of fuzzy sets has been applied in recent years for studying sequence spaces by Tripathy and Baruah [1], Tripathy and Sarma [2], Tripathy and Borgohain [3], and others. Wenxiang and Tu [4] introduced the concept of fuzzy field in field and fuzzy linear spaces over fuzzy field. Furthermore, different authors are attempting to define fuzzy normed linear spaces, fuzzy inner product space, fuzzy Hilbert space, fuzzy Banach spaces, and so forth (cf. [5–8]). Many authors introduced different notion of fuzzy metric on a fuzzy set from different points of view. Kaleva and Seikkala [9] introduced the notion of a fuzzy metric space where metric was defined between fuzzy sets. The idea behind this notion was to fuzzify the classical metric by replacing real values of a metric by fuzzy values (fuzzy numbers). For the further research work and the properties of this type of fuzzy metric space see for instance Fang [10], Quan Xia and Guo [11], and others. Wong [12] defined fuzzy point and discussed its topological properties and there after Deng [13] defined Pseudo-metric spaces where metric was defined between fuzzy points rather than between fuzzy sets. Hsu [14] introduced fuzzy metric space with metric defined between fuzzy points and examined the completion of fuzzy metric space. For different notions of fuzzy metric space and for further research work see for instance Shi [15], Shi and Zheng [16], Shi [17] and others. This paper is an attempt to define a fuzzy set field in a field which is assumed to be the generalization of a fuzzy field introduced by [4]. We restate fuzzy set in more general form by allowing a particular fuzzy set to consist a family of membership functions. A fuzzy metric on fuzzy set and on fuzzy set field is reintroduced in such way that the classical metric is considered as a special type of fuzzy metric. In the sequel, a notion of magnitude of a fuzzy point in a field is introduced for the first time (up to our knowledge) and some of its
International Journal of Engineering Science and Technology , 2011,
Abstract: Linearly Chirped Fiber Bragg Gratings (FBGs) have been optimized and investigated for intragrating sensing. The side lobes have been suppressed using Gaussian apodization while maintaining the peak reflectivity and the bandwidth of the reflected signal. We have achieved a chirp rate of 0.5 to 2 nm/mm for intragrating sensing.Average thermal sensitivity of 11.55 pm/ oC is obtained which is higher than uniform FBGs. We have achieved novel characteristics of linearly chirped FBGs under the effect of non-monotonic physical parameter distribution fields for excellent spectral response profile for intragrating sensing.
Kalayou Kidanu Berhe*, Asrat Demissie , Alemayoh Bayeray Kahsay and Haftu Berhe Gebru
International Journal of Pharmaceutical Sciences and Research , 2012,
Abstract: Background: Diabetes is a group of metabolic disorders that affect the body’s ability to process and use sugar (glucose) for energy. Type 2 diabetes mellitus resulting from the combination of resistance to insulin action and inadequate insulin secretion. The success of long-term maintenance therapy for diabetes depends largely on the patients’ adherence with self-care practices.Objective: The aim of this study was to assess diabetes self-care practices and associated factors among type 2 diabetic patients in Tikur Anbessa Specialized Hospital, Ethiopia. Method: institutional based cross sectional study was employed and 320 study subjects were selected using systematic random sampling technique. And the data was collected using interviewer administered structured questionnaire; data was analyzed and cleaned using SPSS version 16. Scoring method was employed to classify patients’ self-care practice level as adhered or not adhered to self-care practices.Results: Of all respondents 167(52.2%) female. Mean age of the respondents was 55.03±10.7 years with minimum age of 30 and maximum age of 85. The mean duration of diabetes was 12.3±7.6years with minimum of 6 months and maximum of 41 years. Respondents’ self-care practices were, the majority 270 (84.4%) respondents were not adhered to Self-Monitoring of blood glucose practice. A total of 311(97.2%) respondents were adhered to anti-diabetic medication. The majority 252 (78.8%) respondents were not adhered to recommended diet management practices. There was a significant association between Level of education, monthly income, Presence of glucometer at home, marital status, diabetic complication, age and gender and self-care practices. But there was no significant association between duration of diabetes, Occupation and family history of diabetic and self-care practices.Conclusion: findings of this study indicated that majority patients had poor adherence to self-care practices especially in self-monitoring of Blood Glucose and diet management practices.
EM Algorithms for Weighted-Data Clustering with Application to Audio-Visual Scene Analysis
Israel D. Gebru,Xavier Alameda-Pineda,Florence Forbes,Radu Horaud
Computer Science , 2015,
Abstract: Data clustering has received a lot of attention and numerous methods, algorithms and software packages are available. Among these techniques, parametric finite-mixture models play a central role due to their interesting mathematical properties and to the existence of maximum-likelihood estimators based on expectation-maximization (EM). In this paper we propose a new mixture model that associates a weight with each observed point. We introduce the weighted-data Gaussian mixture and we derive two EM algorithms. The first one considers a fixed weight for each observation. The second one treats each weight as a random variable following a gamma distribution. We propose a model selection method based on a minimum message length criterion, provide a weight initialization strategy, and validate the proposed algorithms by comparing them with several state of the art parametric and non-parametric clustering techniques. We also demonstrate the effectiveness and robustness of the proposed clustering technique in the presence of heterogeneous data, namely audio-visual scene analysis.
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