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Search Results: 1 - 10 of 189986 matches for " G. Yassin "
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Assessment of the Sensitivity of Streamflow Simulations to Changes in Patch Resolution Using GIS Based Hydro-Ecologic Model  [PDF]
Samson G. Mengistu, Melkamu A. Ali, Fuad A. Yassin
Open Journal of Modern Hydrology (OJMH) , 2016, DOI: 10.4236/ojmh.2016.62007
Abstract: Eight different patch configurations were investigated to analyze the effect of patch characterization/formation in streamflow simulation, using the Regional Hydro-Ecologic Simulation Systems (RHESSys) model. It is investigated for eight different patch configurations of a subcatchment of the Turkey Lakes Watershed, Ontario. The model’s hydrological parameters are calibrated for each of these patch configurations and the performance of the simulations is evaluated. Results indicate that both the nature of the flow simulation and the calibrated parameter values are sensitive to patch configuration. The best simulation results were obtained for the patch configuration with the highest spatial variation of climate, stream network and hillslope conditions across the subcatchment. Different patch configurations also lead to markedly different calibrations of the model’s hydrological parameters (54.26 < k < 119.13; and 1.02 < m < 2.28), which has implications for the physical interpretation and transferability of the calibrated parameter values.
Climate Characteristics over Southern Highlands Tanzania  [PDF]
Yassin Mbululo, Fatuma Nyihirani
Atmospheric and Climate Sciences (ACS) , 2012, DOI: 10.4236/acs.2012.24039
Abstract: This study was conducted to examine the climate characteristic of southern highland Tanzania (Latitude 6°S-12°S and Longitude 29°E-38°E). The study findings reveal that rainfall over the region is linked with SST over the Indian Ocean, where warmer (cooler) western Indian Ocean is accompanied by high (low) amount of rainfall over Tanzania. During wet (dry) years, weaker (stronger) equatorial westerlies and anticyclone (cyclonic) anomaly over the southern tropics act to reduce (enhance) the export of equatorial moisture away from East Africa. The wettest (driest) season was found to be 1978/79 (1999/00) which can be classified as the severely wet (moderate drought). Two different modes of rainfall have been identified at time scale of 1.5 and 6 years which have been associated with the quasi biennial oscillation (QBO) and El Nino Southern Oscillation (ENSO), respectively.
Increasing Detection and Confirmation of Tuberculosis in Children in Southern Ethiopia: Pooled Samples Tested Using Microscopy and Xpert  [PDF]
Daniel G. Datiko, Mulualem A. Gadena, Mubarek A. Yassin, Kefyalew T. Garie, Moges D. Ormago, Luis E. Cuevas
Journal of Tuberculosis Research (JTR) , 2018, DOI: 10.4236/jtr.2018.63020
Abstract: Background: Childhood tuberculosis accounts for about 10% of estimated TB cases in the world. Despite advances in diagnostics, childhood TB remains a challenge. We evaluated pooling method and testing with GeneXpert MTB/RIF in southern Ethiopia. Methods: This is a cross-sectional study in presumptive TB children < 15 years. Structured questionnaire was used to collect socio-demographic and clinical data. Two sputum or gastric aspirate sample were collected and examined by ZN and Xpert MTB/RIF for 1st, 2nd and pooled samples. Results: Of 340 presumptive TB cases enrolled, 96 and 244 children submitted gastric aspirate and sputum samples respectively. Of 1020 samples collected (282 gastric aspirate and 738 sputum samples), 38 (3.7%) were positive by Xpert (10 (3.5%) from gastric aspirate and 28 (3.8%) from sputum sample). Similarly, 8 (1.2%) of sputum samples were positive by ZN but none from gastric aspirate. Of 244 children who submitted sputum samples, 3 (1.2%) were bacteriologically positive compared to 12 (4.9%) by Xpert. Of 96 children who submitted gastric aspirate samples, none were positive by ZN while 5 (5.2%) were positive by Xpert. Of bacteriologically confirmed TB cases 0.9% was by ZN and 4.7% by Xpert, an increase of 3.8%. Pooled testing increased positivity by 0.3% for ZN and 1.5% by Xpert compared to the 1st sample. Conclusions: Xpert MTB/RIF testing increases yield compared to ZN testing for gastric aspirate samples. The same-day approach and pooling samples improves efficient use of cartridge, reduce the number of visits for seeking diagnosis and save resources.
STUDIES ON GENETIC PARAMETERS IN GRAIN AMARANTHUS (AMARANTHUS HYPOCHONDRIACUS L.) AS INFLUENCED BY PLANT DENSITIES
Ramesh K. Selvan,Mohamed G. Yassin,R. Govindarasu
Journal of Plant Breeding and Genetics , 2013,
Abstract: Selection of genotypes with adequate combination of traits with high yield at the appropriate density level increased the productivity in amaranth. The study was therefore undertaken to estimate genetic attributes of different amaranth genotypes and to identify and select genotypes with adequate trait combination for improvement in yield. In grain amaranthus (Amaranthus hypochondriacus L.) ten genotypes were evaluated for twelve characters under four plant density levels viz., very high (D1), high (D2), normal (D3) and low plant density (D4) to study the different selection parameters for grain yield and its eleven contributing morphological and quality traits. The study was conducted at College Orchard, Department of Horticulture, Pandit Jawaharlal Nehru College of Agriculture and Research Institute, TNAU, Karaikal during rabi 2007. The results revealed that the GCV was maximum in high plant density when compared to very high, normal and low plant density levels for the characters viz., fresh weight of the inflorescence, length of the rachis per inflorescence, grain yield per plant and total carbohydrates. Leaf area at 50 per cent flowering, fresh weight of the inflorescence, number of secondary branches per inflorescence and total carbohydrates are recorded high magnitude of genetic variability in combination with high heritability and genetic advance as per cent of mean in all the four plant density levels.
Heat and moisture exchanger PALLBB22-15F can prevent ventilator-associated pneumonia (VAP) in short term mechanically ventilated ICU patients
MY Yassin
Critical Care , 2000, DOI: 10.1186/cc390
Abstract: Subjects were intubated and attached to the conventional respiratory assistance cascades in the first year of the study (July 1992-June 1993). Retrospectively, cases of VAP were calculated prospectively, during the following year (July l993-June 1994), subjects were intubated and attached to respiratory assistance cascades; but PALL filter, a heat and moisture exchanger, was in-line and the machine humidifiers were bypassed. The cases of VAP were calculated.Intubated ICU patients with normal CXR on admission to the unit.VAP rates decreased in the group of HMEF dramatically in comparison to the conventional humidification method (see Table below).We concluded that heat and moisture exchanger filters can prevent VAP in short term mechanically ventilated ICU patients, and can halve its rate in long term durations.
Die Rolle von Testosteron bei der erektilen (Dys-) Funktion
Yassin AA
Blickpunkt der Mann , 2008,
Abstract:
Phylogenetic Relationships Among Species Subgroups in the Drosophila saltans Group (Diptera: Drosophilidae): Can Morphology Solve a Molecular Conflict?
果蝇Drosophila saltans种亚组(双翅目:果蝇科)系统发育关系:形态学能否解决分子冲突?(英文)

Amir Yassin,
Amir
,Yassin

动物学研究 , 2009,
Abstract: Proper phylogenetic reconstruction is crucial for understanding many evolutionary phenomena. In spite of the great success of molecular phylogenetics, DNA signal still may be limited by some intrinsic constraints such as codon usage bias. The phylogenetic relationships between the five species subgroups of the Drosophila saltans group are a good example of conflicting molecular phylogenies drawn from different genes due to an ancestral substitutional shift. Here, forty morphological characters were analyzed using the same set of species used in previous molecular studies, with at least a single representative of each subgroup. The cladistic analysis was in disagreement with most of the previous hypotheses in placing the sturtevanti subgroup as an early branch, whereas the four remaining subgroups form a well supported clade that can be further subdivided into two sister clades: one containing the cordata and the elliptica subgroups, whereas the second includes the parasaltans and the saltans subgroups. The molecular evolution (codon usage bias) of the saltans group were revised in light of the present finding. The analysis highlights the important role of morphology in phylogeny reconstruction and in understanding molecular evolutionary phenomena.
Waveguide-to-planar circuit transition for millimetre-wave detectors
G. Yassin,P. K. Grimes,O. G. King,C. E. North
Physics , 2008, DOI: 10.1049/el:20081383
Abstract: We present a novel design of a waveguide to microstrip or coplanar waveguide transition using a unilateral finline taper. The transition from the unilateral finline mode to the TEM microstrip mode is done directly, avoiding the antipodal finline tapers that have commonly been employed. This results in significant simplification of the design and fabrication, and shortening of the chip length, thereby reducing insertion loss. In this paper we shall present designs at 90 GHz that can be employed in superconducting tunnel junction mixers or Transition Edge Sensor bolometers, and scale-model measurements at 15 GHz.
Urogenital Fistula in Cote d’Ivoire: Epidemiological, Clinical and Therapeutical Aspects  [PDF]
B. Kouame, F. Kramo, F. M. Gbeli, A. Fofana, A. G. Kakou, J. J. Gandonou, J. J. Damba, M. Roua, S. Yassin, P. G. Konan, A. H. Dekou, G. A. Ouegnin, K. Manzan
Open Journal of Urology (OJU) , 2017, DOI: 10.4236/oju.2017.711022
Abstract: Goal: Contribute to improve treatment of patients suffering from urogenital fistula (UGF). Materials and methods: It was a descriptive and prospective study conducted by the United Nations Population Fund (UNFPA) and the Ivorian government, on treatment of fistulas. The caravan took place on 4 periods of 10 days each and has enabled us to recruit 95 patients in the gynecological emergency department of Bouake’s University Hospital Center (UHC) and from the surgical emergencies departments of the regional hospital centers (RHC) of Man and Bondoukou, in Man from 14th to 23rd of August 2013, then from 24th March to 02nd of April 2014; in Bouaké from 06th to 15th of November 2013 and in Bondoukou from 13th to 22nd of December 2013, respectively. Results: Average age of patients was of 30.8 years. 50 patients were single (52.6%). 44.2% of patients were farmers. In 95.8% of cases it was about obstetrical fistulas of which 52.6% were caused by caesareans. Average duration of delivery labor was of 2.3 days. Vesicovaginal fistulas represented 65.3% of UGF. Suture split were carried out on 90 patients (94.7%). Within 01 month, success rate was of 63.9% for 83 known patients. Conclusion: Incidence of UGF in our country is certainly underestimated. They are mainly of obstetrical origin and treatment relies on sutures split which give satisfactory results.
The rate of TB-HIV co-infection depends on the prevalence of HIV infection in a community
Daniel G Datiko, Mohammed A Yassin, Luelseged T Chekol, Lopisso E Kabeto, Bernt Lindtj?rn
BMC Public Health , 2008, DOI: 10.1186/1471-2458-8-266
Abstract: All TB patients and pregnant women attending health institutions for TB diagnosis and treatment and ANC were consecutively enrolled in 2004 – 2005. TB diagnosis, treatment and HIV testing were done according to the national guidelines. Blood samples were collected for anonymous HIV testing. We used univariate and multivariate logistic regression analysis to determine the risk factors for HIV infection and linear regression analysis to determine the correlation between HIV infection in TB patients and pregnant women.Of the 1308 TB patients enrolled, 226 (18%) (95%CI: 15.8 – 20.0) were HIV positive. The rate of HIV infection was higher in TB patients from urban 25% (73/298) than rural areas 16% (149/945) [AOR = 1.78, 95%CI: 1.27–2.48]. Of the 4199 pregnant women attending ANC, 155 (3.8%) [95%CI: 3.2–4.4] were HIV positive. The rate of HIV infection was higher in pregnant women from urban (7.5%) (80/1066) than rural areas (2.5%) (75/3025) [OR = 3.19, 95% CI: 2.31–4.41]. In the study participants attending the same health institutions, the rate of HIV infection in pregnant women correlated with the rate of HIV infection in TB patients (R2 = 0.732).The rate of HIV infection in TB patients and pregnant women was higher in study participants from urban areas. The rate of HIV infection in TB patients was associated with the prevalence of HIV infection in pregnant women attending ANC.The interaction between tuberculosis (TB) and human immunodeficiency virus (HIV) infection is complex. In the individual patient, HIV infection weakens the immune system and increases the susceptibility to TB. HIV increases the likelihood of reactivation, reinfection and progression of latent TB infection to active disease. It also alters the clinical presentation of TB, complicates the follow up and compromises the response to anti-TB treatment [1].In a population, the lifetime risk of developing active TB once infected, in absence of HIV infection, is about 10% [2]. However, it increases tenfo
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