El Obeid, Sudan

University of Kordofan

El Obeid, Sudan

The University of Kordofan is one of the largest universities in Sudan located in Al-Ubayyid 560 km to the southwest of Khartoum. It was founded in 1990. University of Kordofan is recognized as one of the top universities in Sudan.It features several institutes, academic units and research centres including Gum Arabic Research Centre, Centre for Intermediate Technology in Agriculture and Deanship for Research and Postgraduate Training.It is a member of the Federation of the Universities of the Islamic World. Wikipedia.

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Abdelhadi O.M.A.,University of Kordofan | Babiker S.A.,University of Khartoum | Picard B.,French National Institute for Agricultural Research | Jurie C.,French National Institute for Agricultural Research | And 3 more authors.
Meat Science | Year: 2012

Thirty fattened one humped desert camels were used to examine the effect of season on contractile and metabolic properties of Longissimus thoracis (LT) muscle. Ten camels were slaughtered according to seasons of the year (winter, summer and autumn). Season significantly influenced muscle chemical composition, ultimate pH (pHu) and color. Activities of metabolic enzymes were higher during autumn season compared to summer and winter for phosphofructokinase (+. 64% compared to both seasons) and for isocitrate dehydrogenase (+. 35% and +. 145% in autumn vs. summer and winter, respectively). Quantification of muscle myosin heavy chain isoforms by SDS-PAGE electrophoresis showed only presence of type I and type IIa MyHC in camel muscle and indicated high proportion in winter for type I and in autumn for type IIa with respect to other seasons. Several correlations between different MyHC proportions and enzyme activities were reported. These findings indicated that muscle characteristics in camels are influenced by season. © 2011 Elsevier Ltd.

Hafez M.A.,October 6 University | Sheikhedrees S.M.,University of Kordofan | Saweeres E.S.B.,The Good
Journal of Arthroplasty | Year: 2016

Background: We aim to measure the proximal tibia and distal femur of the osteoarthritic knees of Arab patients and to compare these measurements with data on other ethnic groups available in literature and with the dimensions of 6 knee implants. Methods: Anteroposterior and mediolateral measurements of tibia and femur were done on 3-dimensional computed tomography reconstructions of 124 osteoarthritic knees undergoing total knee arthroplasty with patient-specific instruments. Results: Average mediolateral and anteroposterior dimensions of the tibia for Arab knees were 74.36 ± 6 mm and 48.94 ± 4.57 mm, respectively, whereas for femur, 72.04 ± 6.6 and 68.1 ± 7.75, respectively. Average aspect ratio for tibial was 152.62 ± 12.66 and for femur 106.37 ± 14.34. Conclusion: The size of Arab knees was generally smaller than Caucasian and larger than Asian. There is significant asymmetry of proximal tibial plateau and femur condyles. © 2016 Elsevier Inc.

Bakri M.,Childrens Hospital | Ismail E.,Childrens Hospital | Elsedfy G.,Childrens Hospital | Amr M.,Mansoura University | Ibrahim A.,University of Kordofan
Saudi Journal of Anaesthesia | Year: 2014

Background: Sickle cell disease (SCD) in children with a history of repeated hospitalization is distressing for children as well as their parents leading to anxiety and has negative effects on the psychological state of children and their families. Objective: The aim of the study was to determine the overall effect of SCD on the behavior of young children age 11/2 to 5 years old who had repeated history of hospitalization, compared to a control group of healthy children attended a vaccination clinic. Patients and Methods: Thirty-five children of age 11/2 to 5 years who have SCD and repeated history of hospitalization were recruited from pediatric clinic as the study group and matched with same number of healthy children who attended vaccination clinic, as a control group. Both groups were administered the child behavior checklist (CBCL) 11/2 to 5 years and diagnostic and statistical (DSM)-oriented scale. Behavior data were collected through a semi-structured questionnaire. Results: Children who have SCD had statistically significant behavioral changes on CBCL compared to the control group: Anxiety/depression (65.2 vs. 55.1; P < 0.001), somatic complaint (66.7 vs. 54.4; P < 0.001) withdrawn (63.4 vs. 53.2; P < 0.001), aggressive behavior (60.4 vs. 56; P=0.04), and internalizing symptoms (64.7 vs. 51.5; P < 0.001), respectively. The DSM scale showed that children with SCD scored significantly higher in pervasive developmental disorder compared to the control group (60.9 vs. 53.9; P < 0.001) respectively. Conclusion: Children with SCD who had history of repeated hospitalization are at an increased risk of developing behavioral problems. Psychological counseling, social support, and proper pain management could minimize these behavioral consequences.

Bakri M.H.,Assiut University | Ismail E.A.,Assiut University | Ibrahim A.,University of Kordofan
Korean Journal of Anesthesiology | Year: 2015

Background: Postoperative nausea and vomiting (PONV) are common following laparoscopic cholecystectomy (LC). Dexamethasone has been reported to reduce PONV. However, there is insufficient evidence regarding the effect of dexmedetomidine in decreasing PONV. This study was designed to compare the effects of a single dose of dexmedetomidine to dexamethasone for reducing PONV after LC. Methods: Eighty-six adult patients scheduled for LC were randomized to receive either single dose 1 μg/kg of dexmedetomidine (Dexmed group, N = 43) or 8 mg dexamethasone (Dexa group, N = 43) before skin incision. During the first 24 h postoperatively, the incidence and severity of PONV were assessed. Pain and sedation scores were assessed on arrival in the recovery room and early postoperatively. Analgesic and antiemetic consumption during the 24 h after surgery were calculated. Intra-operative and postoperative hemodynamics were recorded. Results: Twenty-one percent of the patients in the Dexmed group developed PONV compared to 28% in the Dexa group (P = 0.6). Severity of PONV was similar between the two groups (P = 0.07). Early postoperatively, pain severity was significantly lower in the Dexmed group, but sedation scores were significantly higher. The first analgesic request was significantly delayed in the Dexmed group (P = 0.02). The total amounts of intraoperative fentanyl and postoperative tramadol administered were significantly lower in the Dexmed group. No difference in ondansetron was noted between the two groups. Mean arterial pressure and heart rate were significantly lower in the Dexmed group after administration of dexmedetomidine. No major side effects were reported. Conclusions: Dexmedetomidine reduces the incidence and severity of PONV, similar to dexamethasone. It is superior to dexamethasone in reducing postoperative pain and total analgesic consumption during the first 24 h after LC. © the Korean Society of Anesthesiologists, 2015.

Chen N.,Wuhan University | Chen N.,University of Hong Kong | Liao F.,Wuhan University | Wang L.,Wuhan University | And 6 more authors.
Precambrian Research | Year: 2013

The Quanji Massif preserves important records of late Paleoproterozoic metamorphic events that provide insights into the tectonic history of the Tarim Craton and its relation with the North China Craton. Here we investigate amphibolites from two regions in the Quanji Massif. U-Pb ages from metamorphic zircons in the amphibolites, combined with previously published ages from this region, define distinct metamorphic events during Paleoproterozoic. The earlier medium- P/. T type upper amphibolite-facies metamorphic event occurred at ca. 1.90-1.96. Ga in a collisional setting. The second event took place with low- P/. T type amphibolite-facies metamorphism in an arc setting at ca. 1.82-1.85. Ga, with a subsequent medium- P/. T type metamorphism during arc-continental collision at ca. 1.80-1.82. Ga. Our data reveal for the first time that the late Paleoproterozoic metamorphic events in the Quanji Massif are closely comparable with those documented from the Khondalite Belt within the Inner Mongolia Suture Zone and the Trans-North China Orogen in the North China Craton. We therefore propose that the Quanji Massif and Tarim Craton probably shared similar tectonic histories with those of the North China Craton in the late Paleoproterozoic, coinciding with the global assembly of the Columbia supercontinent. © 2013 Elsevier B.V.

Liao F.,Wuhan University | Zhang L.,Wuhan University | Chen N.,Wuhan University | Chen N.,University of Hong Kong | And 6 more authors.
Precambrian Research | Year: 2014

The Quanji Massif, located in the northeastern margin of the Tibet Plateau, is interpreted as a fragment of the Tarim Craton. The massif exposes a suite of metamorphosed mafic dykes. LA-ICP-MS U-Pb dating constrains the timing of intrusion of these dykes at ca. 1834±23Ma. The dykes display minor variations in major elements, with SiO2=46.8-53.4wt%, MgO=5.19-8.10wt%, FeOt=8.83-15.6wt%, TiO2=0.58-1.78wt% and Mg#=46.3-69.7. Their immobile trace element compositions show a sub-alkali basalt affinity. The positive correlation of TiO2 with FeOt/MgO in these rocks shows an arc tholeiite evolutionary trend. The enrichment of LILE and LREE and depletion in HFSE suggest that the precursor magma was generated in a back-arc environment. Furthermore, these rocks possess (Nb/La)N of 0.31-0.52 and (Th/La)N of 0.61-1.39, whole rock (87Sr/86Sr)i values of 0.707598-0.724141, e{open}Nd(t) of -2.9 to +0.3 and (206Pb/204Pb)t of 16.8148-24.1513, (207Pb/204Pb)t of 15.3422-16.3630 and (208Pb/204Pb)t of 36.8415-39.7926. The magmatic zircons yielded e{open}Hf(t) of -3.4 to +6.1 and depleted mantle model ages (TDM) of 2.01-2.37Ga. The geochemical and isotopic characteristics of these rocks suggest that their precursor magma was derived from a subduction-related fluid-metasomatized subcontinental lithospheric mantle mixed with a depleted mantle component. We suggest that a prolonged subduction-accretion-collision process along the southeastern margin of the Tarim Craton prevailed at ~2.1-1.80Ga, with local consumption of the Southeast Tarim Archipelagic Ocean during the collision of the Southeast Tarim Block with the Quanji Massif (microcontinent) at around 2.1-1.9Ga. The final closure of the whole Southeast Tarim Archipelagic Ocean occurred at ~1.85-1.82Ga and collision between the Southeast margin of the Tarim Craton and other unknown continental blocks at 1.82-1.80Ga, broadly coeval with the amalgamation of the Western and Eastern Blocks of the North China Craton and their assembly in the Columbia supercontinent. © 2014 Elsevier B.V.

Nori W.,University of Kordofan | Csaplovics E.,TU Dresden
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

The objective of this study was to evaluate the potential for monitoring forest change using Landsat ETM data and Aster data for two periods (2000 - 2003 and 2003 - 2006). This was accomplished by performing three widely used vegetation indices: Normalized Difference Vegetation Index (NDVI), Soil Adjusted Vegetation Index (SAVI), and Transformed Difference Vegetation Index (TDVI). An RGB-NDVI change detection strategy to detect major decreases or increases in forest vegetation was developed as well. These indices were applied to a case study in El Rawashda forest reserve, Gedaref State, Sudan, and their results and accuracy were discussed. Results showed that the vegetation index maps obtained by NDVI and SAVI transformations within each computational group were similar in terms of spatial distribution pattern and statistical characteristics. As far as the degree of greenness of vegetation was concerned, the TDVI appeared to be the most sensitive. For the first period, the highest accuracy was obtained by SAVI (62.5%); however, the poorest accuracy was achieved by TDVI (59.5%). For the second period, TDVI revealed the highest accuracy (60.1%), whereas both NDVI and SAVI counted accuracy of 59.2%. Generally, the study proved that all vegetation indices produced reasonable approaches to map land cover changes over time and help to pinpoint deforestation and regrowth in the study area. © 2013 SPIE.

Zolpakar N.A.,University of Technology Malaysia | Mohd-Ghazali N.,University of Technology Malaysia | Hassan El-Fawal M.,University of Kordofan
Renewable and Sustainable Energy Reviews | Year: 2016

Concerns over environmental impacts of hazardous refrigerants have spurred much research into alternative technologies as well as more environmentally friendly refrigerants. A thermoacoustic refrigeration system uses no refrigerant but is currently not a feasible solution due to the still immature technology with much still unknown about the theories that explain the thermoacoustc cooling effects and the desired performance. This paper reviews past studies to achieve the desired outputs; lowest temperature, the highest temperature difference generated across the stack, the lowest acoustical work required for cooling, or/and the highest coefficient of performance (COP) of the standing wave thermoacoustic refrigerator and various attempts at optimization in terms of the many parameters that represent the outcomes. The review looked at methods employed to analyze the performance with discussions on the relevant parameters that must and have been be considered by past researchers. To date, most studies have been focused on the stack, the heart of the system. Optimization work has been performed parametrically, experimentally or/and numerically, where discrete variations of the parameters investigated are completed whilst others are held constant. Lately, genetic algorithm, a statistical approach, has been utilized in simultaneous optimization of the parameters of the desired outputs where conflicting objectives are possible. To date, thermoacoustic refrigerator remains an attractive alternative technology towards a global agenda of a more sustainable future. © 2015 Elsevier Ltd.

Adam H.E.,University of Kordofan | Csaplovics E.,TU Dresden | Elhaja M.E.,University of Kordofan
IOP Conference Series: Earth and Environmental Science | Year: 2016

This paper deals with the comparison between application of pixel-based and object- based approaches in land use land cover classification in semi-arid areas in Sudan. The second aim is to assess the accuracy of classification for each approach. The study was conducted in the gum arabic belt in North Kordofan State, which is affected by modifications in conditions and composition of vegetation cover trends. The study used ASTER L1B registered radiance at the sensor image acquired on (19.10.2010). The image was radiometrically corrected by using ENVI-FLAASH software. Subset with an area of (40880) ha was created. The image classification (pixel-based and object-based) and accuracy assessment were conducted. Total number of (47) GCPs were surveyed and used in accuracy assessment using ERDAS 9.1. Image segmentation process was implemented using Definiens eCognition 7.1 software. Segmentation level 4 of scale parameter 25 was selected for classification based on colour and form homogeneity. Land use land cover classes were derived by classification using the nearest neighbor classifier with membership functions (fuzzy logic) for each class. The land use land cover distribution in the area for forest dominated by Acacia Senegal is (20%) and for residential area is (1.50%) for the two methods of classification. While for bare and farm land, grass and bush land and mixed woodland classes are (6.69% and 1.63%), (18.62% and 15.16%) and (53% and 61%) for pixel based and object based methods, respectively. The overall accuracy and Kappa statistic of the classification produced by the pixel-based and object-based were (72.92%, and 54.17%) and (0.6259 and 0.3810), respectively. The pixel based approach performed slightly better than the object-based approach in land use land cover classification in the semi-arid land in gum Arabic belt.

Mohd-Ghazali N.,University of Technology Malaysia | El-Fawal M.H.,University of Kordofan
Jurnal Teknologi | Year: 2016

Although numerous successful thermoacoustic refrigerators have been reported to date, the performance of these systems is still lower than their vapor compression counter parts. Optimization is imperative to identify the upper limit of the performance in order to be competitive and accepted by the general public. However, optimization methods adopted so far, experimentally and numerically, involved discrete variations of the selected parameters of interest. This paper presents the results of an optimization using the Lagrange Multiplier method, a mathematical approach never used before. The simultaneous optimization of the stack length and center position at various design temperatures is performed for a standard thermoacoustic refrigerator design. Results show similar pattern and trend with previous results with a 24.7% higher stack coefficient of performance achievable. This is promising considering that only two of the design parameters have been optimized. © 2016 Penerbit UTM Press. All rights reserved.

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