Conformal mapping of unbounded multiply connected regions onto canonical slit regions

We present a boundary integral equation method for conformal mapping of unbounded multiply connected regions onto five types of canonical slit regions. For each canonical region, three linear boundary integral equations are constructed from a boundary relationship satisfied by an analytic function on an unboundedmultiply connected region. The integral equations are uniquely solvable. The kernels involved in these integral equations are the modified Neumann kernels and the adjoint generalized Neumann kernels

Effect of Low Seed Rate on Seed and Forage Yield of Alfalfa in the River Nile State, Sudan

An on-farm survey of plant population of one year old, yet highly productive alfalfa (Medicago sativa L.) swards in Khartoum North area, revealed that the plant population after one year from establishment, was equal to that resulting from a seed rate of I .5 kg/ha (i.e. 2.8% of the sown seeds). This suggested that the optimum seed rate for the production of each of the forage and seed of alfalfa in Sudan should be reconsidered. In this context, an experiment was conducted at Hudeiba Research Station for three years during the period of Dec. 1995 - January 1998 to study the time course forage and seed yield patterns of alfalfa sown with five low seed rates (i.e., 2.4, 4.8, 7.2, 9.6 and 12 kg/ha). The results indicated that the highest seed rate (12 kg/ha) produced the highest forage yield in a few cuts only. The variations among the time course forage yields of the various seed rates over the two years were either nonsignificant or enatic. The cumulative annual forage yield of the two higher seed rates, (9.6  and 12 kg/ha) was invariably higher than those of the other seed rates. For seed yield, the lowest seed rate (i.e., 2.4 kg/ha) resulted in the highest seed yield in the first two seed production cycles (SPC) in 1996 as well as in the annual total of the first year. Differences among the seed rates in other SPCs as well as the annual total of 1997 were either lacking or erratic. It is therefore, concluded that for dual purpose (forage and seed) alfalfa, the seed rate should not exceed 9.6 kg/ha, and for seed production the seed rate of 2.4 kg/ha is the optimum

Helium Neon laser therapy for post mastectomy lymphedema and shoulder mobility

The aim of this work was to evaluate the efficacy of Helium Neon (He–Ne) laser therapy on post mastectomy lymphedema and shoulder mobility. Thirty female patients with axillary lymph node dissection (ALND), with or without radiotherapy had been participated in this study. The patients were randomly divided into two groups of equal numbers. Group A received He–Ne laser therapy and decongestive lymphatic therapy. Group B received placebo laser therapy in addition to decongestive lymphatic therapy. Measurements of limb volume and shoulder mobility (by tape measurement and standard goniometer) were collected before treatment and after six months of treatment. The mean values of limb volume and Shoulder mobility after 6 months of treatment showed a significant improvement (p< 0.05) for the two groups of the study with a greater improvement for patients in group A. Conclusion: Helium Neon laser therapy has a positive effect in reducing post mastectomy lymphedema and increasing range of motion of shoulder joint.Keywords: Helium Neon laser; Lymphedema; Mastectomy; Shoulder mobilityThe Egyptian Journal of Medical Human Genetics (2013) 14, 195–19

Design of GCSC Stabilizing Controller for Damping Low Frequency Oscillations

This paper presents a systematic procedure for modeling and simulation of a power system equipped with FACTS type Gate Controlled Series Compensator (GCSC) based stabilizer controller. Single Machine Infinite Bus (SMIB) power system was investigated for evaluation of GCSC stabilizing controller for enhancing the overall dynamic system performance. PSO algorithm is employed to compute the optimal parameters of damping controller. Eigenvalues of system under various operating condition and nonlinear time domain simulation is employed to verify the effectiveness and robustness of GCSC stabilizing controller in damping low frequency oscillations (LFO) modes

Preparation of Some Eco-friendly Corrosion Inhibitors Having Antibacterial Activity from Sea Food Waste

Chitosan is one of the important biopolymers and it is extracted from exoskeletons of crustaceans in sea food waste. It is a suitable eco-friendly carbon steel corrosion inhibitor in acid media; the deacetylation degree of prepared chitosan is more than 85.16 %, and the molecular weight average is 109 kDa. Chitosan was modified to 2-N,N-diethylbenzene ammonium chloride N-oxoethyl chitosan (compound I), and 12-ammonium chloride N-oxododecan chitosan (compound II) as soluble water derivatives. The corrosion inhibition efficiency for carbon steel of compound (I) in 1 M HCl at varying temperature is higher than for chitosan and compound (II). However, the antibacterial activity of chitosan for Enterococcus faecalis, Escherichia coli, Staphylococcus aureus, and Candida albicans is higher than for its derivatives, and the minimum inhibition concentration and minimum bacterial concentration of chitosan and its derivatives were carried out with the same strain

Detection of Trypanozoon trypanosomes infections on Glossina fuscipes fuscipes (Diptera: Glossinidae) using polymerase chain reaction (PCR) technique in the Blue Nile State, Sudan

Tsetse flies transmit many species of trypanosomes in Africa, some of which are human and livestock pathogens of major medical and socio-economic impact. Identification of trypanosomes is essential to assess the disease risk imposed by particular tsetse populations. The present study was carried out to determine the trypanosomal infection rate of tsetse flies (Glossina fuscipes fuscipes) in the Blue Nile State of Sudan. A polymerase chain reaction (PCR) assay was used because of the inherent difficulty of speciating trypanosomal parasites in the fly. Our results show that 4.44% (8/180) of the flies were positive for a Trypanosoma brucei group. Three of eight positive flies reacted with primers for Trypanosoma b. rhodesiense. We did not detect flies infected with T. b. gambiense. Thus, the burden of flies harboring T. b. rhodesiense and T. b. brucei trypanosomes were 1.67 and 2.78%, respectively. This is the first evidence of T. b. rhodesiense in the Yabus District. Thus, HAT case-detection active surveillance and tsetse fly control campaigns should be conducted before the establishment of human settlement, investment of natural resources into agricultural and animal husbandry.Key words: Glossina fuscipes fuscipes, Trypanosoma brucei, T. b. gambiense, T. b. rhodesiense, infection rate, PCR technique, Blue Nile State

The impact of health care expenditure and infectious diseases on labour productivity performance in Africa: do institutions matter?

This study was rooted from the findings that for many years infectious diseases remain the major cause of death around the globe especially in Africa. Economic theory also predicts among others that HIV/AIDS reduces labour supply and productivity, and the GDP of Africa declines by 2-4% annually. In addition, institution is one of the reasons for slower growth in Africa. The study, therefore, examined the impact of health care expenditure per capita and infectious diseases such as HIV/AIDS and tuberculosis (TB) on labour productivity performance in Africa using System GMM Estimation methods for 50 panels of African countries from 2002-2011. The results show that health-care expenditure per capita is positive but insignificant to labour productivity performance in the region. The results also confirm the negative impact of infectious diseases on labour productivity performance in the region. Government effectiveness and control of corruption are positive and significant to the improvement of health care expenditure in Africa. In addition, the study also revealed that political instability and conflict also contribute positively to the spread of infectious diseases in the region. Thus, it is recommended that African governments and health-related development partners increase the financial amount allocated to the health sector. At the same time, more efforts are needed to curb and control the spread of infectious diseases through strengthened institutions to improve health-care expenditure in the region

Therapeutic efficacy of chloroquine and sulfadoxine/pyrimethamine against Plasmodium falciparum infection in Somalia

Study on the therapeutic efficacy of treatments based on chloroquine and sulfadoxine/pyrimethamine in cases of malaria (Plasmodium falciparum) in Merka and Gabiley, Somalia.Daraasaad ku saabsan waxtarka ku daaweynta chloroquine iyo sulfadoxine/pyrimethamine cudurka duumada, degaannada soomaaliyeed ee Marka iyo Gabiley.Studio sull'efficacia terapeutica di trattamenti a base di clorochina e sulfadossina/pirimetamina nei casi di malaria (Plasmodium falciparum) a Merka e Gabiley, Somalia

Optimization of growth and extracellular glucoamylase production by Candida famata isolate

Candida famata was isolated from traditional Moroccan sourdough. It exhibited high glucoamylase and biomass production. Starch induces high glucoamylase production C. famata with maximum glucoamylase activity at 5 g/L. Glucose stimulates good production in biomass but strongly inhibitsglucoamylase production. Among the sources of nitrogen tested, yeast extract and the (NH4)2HPO4 gave maximum glucoamylase and biomass after 72 h of incubation in liquid medium at 30°C, pH 5 and 105 rpm