Ramadoss S.K.,Eritrea Institute of Technology |
Singh A.P.,Defence University |
Mohiddin I.K.G.,Eritrea Institute of Technology
OPSEARCH | Year: 2014
An implementation of evolutionary heuristic algorithm, which is a specific modified variant of cultural algorithm, with simplified computational procedure is presented here for solving assignment problems. A cultural algorithm consists a population component almost identical to that of the genetic algorithm and, in addition, a knowledge component called the belief space. The major constraint of assignment problems that a single job can be assigned to only one resource and the resource or job that involves the largest and as well as the least cost are availed as the knowledge components to be used to build belief space. © Operational Research Society of India 2013.
Aseervatham G.S.B.,Bharathidasan University |
Sivasudha T.,Bharathidasan University |
Sasikumar J.M.,Eritrea Institute of Technology |
Christabel P.H.,Karpagam University |
And 2 more authors.
Journal of Physiology and Biochemistry | Year: 2014
Pouteria campechiana (Kunth) Baehni. is used as a remedy for coronary trouble, liver disorders, epilepsy, skin disease, and ulcer. Therefore, the present study aims to investigate the antioxidant and hepatoprotective effect of polyphenolic-rich P. campechiana fruit extract against acetaminophen- intoxicated rats. Total phenolic and flavonoid contents of egg fruit were estimated followed by the determination of antioxidant activities. Treatment with P. campechiana fruit extract effectively scavenged the free radicals in a concentration-dependent manner within the range of the given concentrations in all antioxidant models. The presence of polyphenolic compounds were confirmed by high-performance thin-layer chromatography (HPTLC). The animals were treated with acetaminophen (250 mg/kg body weight; p.o.) thrice at the interval of every 5 days after the administration of P. campechiana aqueous extract and silymarin (50 mg/kg). Acetaminophen treatment was found to trigger an oxidative stress in liver, leading to an increase of serum marker enzymes. However, treatment with P. campechiana fruit extract significantly reduced the elevated liver marker enzymes (aspartate transaminase, alanine transaminase, and alkaline phosphatase) and increased the antioxidant enzymes (viz., superoxide dismutase and catalase) and glutathione indicating the effect of the extract in restoring the normal functional ability of hepatocytes. These results strongly suggest that P. campechiana fruit extract has strong antioxidant and significant hepatoprotective effect against acetaminophen-induced hepatotoxicity. © 2013 University of Navarra.
Gebremeskel E.I.,University of Khartoum |
Gebremeskel E.I.,Eritrea Institute of Technology |
Ibrahim M.E.,University of Khartoum
European Journal of Human Genetics | Year: 2014
Archeological and paleontological evidences point to East Africa as the likely area of early evolution of modern humans. Genetic studies also indicate that populations from the region often contain, but not exclusively, representatives of the more basal clades of mitochondrial and Y-chromosome phylogenies. Most Y-chromosome haplogroup diversity in Africa, however, is present within macrohaplogroup E that seem to have appeared 21 000-32 000 YBP somewhere between the Red Sea and Lake Chad. The combined analysis of 17 bi-allelic markers in 1214 Y chromosomes together with cultural background of 49 populations displayed in various metrics: network, multidimensional scaling, principal component analysis and neighbor-joining plots, indicate a major contribution of East African populations to the foundation of the macrohaplogroup, suggesting a diversification that predates the appearance of some cultural traits and the subsequent expansion that is more associated with the cultural and linguistic diversity witnessed today. The proto-Afro-Asiatic group carrying the E-P2 mutation may have appeared at this point in time and subsequently gave rise to the different major population groups including current speakers of the Afro-Asiatic languages and pastoralist populations.European Journal of Human Genetics advance online publication, 26 March 2014; doi:10.1038/ejhg.2014.41.
Elhassan N.,University of Khartoum |
Gebremeskel E.I.,University of Khartoum |
Gebremeskel E.I.,Eritrea Institute of Technology |
Elnour M.A.,University of Khartoum |
And 7 more authors.
PLoS ONE | Year: 2014
Human genetic variation particularly in Africa is still poorly understood. This is despite a consensus on the large African effective population size compared to populations from other continents. Based on sequencing of the mitochondrial Cytochrome C Oxidase subunit II (MT-CO2), and genome wide microsatellite data we observe evidence suggesting the effective size (Ne) of humans to be larger than the current estimates, with a foci of increased genetic diversity in east Africa, and a population size of east Africans being at least 2-6 fold larger than other populations. Both phylogenetic and network analysis indicate that east Africans possess more ancestral lineages in comparison to various continental populations placing them at the root of the human evolutionary tree. Our results also affirm east Africa as the likely spot from which migration towards Asia has taken place. The study reflects the spectacular level of sequence variation within east Africans in comparison to the global sample, and appeals for further studies that may contribute towards filling the existing gaps in the database. The implication of these data to current genomic research, as well as the need to carry out defined studies of human genetic variation that includes more African populations; particularly east Africans is paramount. © 2014 Elhassan et al.
Hammond J.O.S.,Imperial College London |
Hammond J.O.S.,University of Bristol |
Kendall J.M.,University of Bristol |
Stuart G.W.,University of Leeds |
And 10 more authors.
Geology | Year: 2013
The Afar Depression, at the northern end of the East African Rift, is the only place on land where the transition from a plumeinduced continental breakup to seafloor spreading is active today. New images of seismic velocity structure, based on exceptional new data sets, show that the mantle plume that initiated rifting in Africa is absent beneath Afar today. The images are dominated by a major low-velocity feature at ~75 km depth closely mimicking the abrupt changes in rift axis orientation seen at the surface. This is likely associated with passive upwelling beneath the rift. Additional focused low-velocity anomalies show that small diapiric upwellings are present beneath major off-axis volcanoes. These multiple melting sources can explain the wide range of geochemical signatures seen in Afar. These images suggest that passive upwelling beneath Afar marks the initiation of rift segmentation as continental breakup progresses to seafloor spreading. © 2013 Geological Society of America.
Sivakumar R.,Eritrea Institute of Technology
Iranian Journal of Radiation Research | Year: 2010
Background: Decay products of radon and thoron present in indoor environment are the most important sources of radiation from natural sources which affect human beings, since general public spend at lest 80% of their time in indoor. Materials and Methods: Air samples were collected for measuring the concentration of radon and thoron daughter products from various indoor environments during four different seasons of the year from the Gudalore taluk of Nilgiri Biosphere using high volume air sampler. The concentration of decay products of radon and thoron were estimated using an alpha counter. Results: Studies have revealed that the annual average potential alpha energy concentrations of radon and thoron progeny in dwellings of Gudalore were recorded as 3.54 and 2.65 mWL respectively. It was also observed that the potential alpha energy concentration (PAEC) values for radon progeny undergo dramatic change with the change of season perhaps due to different aerosol contents in the air. The maximum 222Rn (3.93 mWL) and 220Rn (3.10 mWL) progeny concentrations were observed during winter months and the minimum values (222Rn 3.14 mWL and 220Rn 2.20 mWL) were observed during summer. Conclusion: Studies have shown that the dwelling with mud wall registered high value of radon and thoron progenies (5.49 mWL and 3.88 mWL). While low values were observed in dwellings with vinyl floor. High concentrations of radon and thoron progeny were observed between 3.00 to 5.00 Hrs, while low values were observed at 14.00 hrs. Studies suggest that radiation emission from radon and thoron daughter in the study area were remained well below the recommended level.
Selvam B.,Eritrea Institute of Technology |
Singh A.P.,Eritrea Institute of Technology
Jordan Journal of Mechanical and Industrial Engineering | Year: 2011
Studies were carried out to evaluate the initially preformed density and initial aspect ratio on the densification behavior of sintered Zinc and Zinc Oxide composite. The preform possessed 0.85 is the initial density. Aspect ratio for three different oxidizing temperatures (at 150°C, 200°C and 250°C) varied from 0.4 to 0.85. Properties of Zinc-Zinc Oxide composites with respect to linear strain, lateral strain and true stress were evaluated and plotted. Studies revealed that higher stress and higher strain values are obtained in composite when compared to the Zinc dust. The composite of Zinc-Zinc Oxide obtained at 150°C possessed the highest stress and strain when compared to the composites obtained at others two temperatures (200°C and 250°C). © 2011 Jordan Journal of Mechanical and Industrial Engineering.
Anuraj R.,Eritrea Institute of Technology |
Sathesh A.,Eritrea Institute of Technology |
Smys S.,Karpagam College of Engineering
2nd International Conference on Electronics and Communication Systems, ICECS 2015 | Year: 2015
Mostly all domestic and commercial installation uses 3-phase 4-wire distribution system, but pretty much appliances are single phased which may create unbalance in the supply system also typical loads like TV, personal computers, mobile phone chargers, Air conditioners etc. uses power electronic converters and draws non-sinusoidal currents, these two situations may cause high neutral current and create harmonics in the supply system. It may cause wiring failures, rising of neutral potentials, transformer overheating, etc. In response to this problem, this paper proposes some passive compensation methods for minimizing the neutral current and harmonics in the three-phase four-wire distribution system. The proposing methodology using combinations of ZSBR with various transformers like T-connected transformers, star delta transformer, Scott connected transformer, star polygon transformer and star hexagon transformer. In this paper, analysis is carried to evaluate the performance of various transformers in combination with ZSBR under unbalanced and non-linear loads. The simulation results shows that the neutral current is reduced to negligible value and the total harmonic distortion has been reduced below 50% as in the supply lines. © 2015 IEEE.
PubMed | CNRS Magmas and Volcanoes Laboratory, University of Alaska Fairbanks, Michigan Technological University, CNRS Paris Institute of Global Physics and 10 more.
Type: Journal Article | Journal: Bulletin of volcanology | Year: 2015
We present a synthesis of diverse observations of the first recorded eruption of Nabro volcano, Eritrea, which began on 12 June 2011. While no monitoring of the volcano was in effect at the time, it has been possible to reconstruct the nature and evolution of the eruption through analysis of regional seismological and infrasound data and satellite remote sensing data, supplemented by petrological analysis of erupted products and brief field surveys. The event is notable for the comparative rarity of recorded historical eruptions in the region and of caldera systems in general, for the prodigious quantity of SO
PubMed | Jomo Kenyatta University of Agriculture and Technology, Eritrea Institute of Technology and Bisha Mining Share Company
Type: | Journal: TheScientificWorldJournal | Year: 2016
This study was designed to investigate the profile of certain trace elements having therapeutic properties related to diabetes mellitus. The investigated plants were