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Bahgat, A., and Z. Osman, "Improving the Operational Performance of Synchronous Generators with Static excitation Controllers", Jordan International Electrical and Electronic Engineering Conference, Jordan, April 1983.
Osman, Z., "Limitation of Ground Fault Currents in the Cairo 500/220 Autotransformer Substation", 8th Annual Conference in Statistics, Computer Science, Information and Operation Research, Egypt, Dec. 1983.
Bahgat, A., and Z. Osman, "Low Damped Electromechanical Oscillations in Electric Power Network", Africon Electrical TechnoloRv Conference AFRICON 83, Nairobi, Kenya, Dec. 1983.
Osman, Z., and M. Mostafa, "A Study of Fault Currents and Voltages Caused by Different Fault Types in the 220 Kv Network of lower Egypt", 9th Annual Operation Research Conference, Egypt, Feb. 1983.
Osman, Z., and E. L. M. Shibini, "Technical and Economical Study of a Small Scale Photovoltaic Pumping System in Egypt", Mediterranean Electrotechnical Conference MELECON ' 83, Greece , May 1983.
Fahim, M. M., M. A. Kararah, A. A. El-Gharabawi, K. A. M. Abada, and others, "Chemical control of damping-off of sugar beet (Beta vulgaris) caused by Sclerotium rolfsii.", Egyptian Journal of Phytopathology, vol. 16, no. 1-2, pp. 35–42, 1984. Abstract
Hanafi, M. S., and A. Obeidah, "Genetic and phenotypic parameters of the egg shell thickness in Fayoumi and Rhode Island Reds [Egypt]", Annals of Agricultural Science, Moshtohor, vol. 21, 1984. Abstract
Nafei, H. A., F. F. Saad, N. A. M. Ahmed, and A. Obeidah, "Genetic polymorphism in Egyptian livestock. 6.-Genetic variation in blood serum transferrin albumin and ceruloplasmin loci in Egyptian Fayoumi fowls.", Egyptian Journal of Genetics and Cytology, vol. 13, 1984. Abstract
Abdel-Rahim, E. A., A. M. Aboul-Enein, and M. A. Osman, "Glucose-6-phosphate dehydrogenase of chicken erythrocytes [Egypt]", Bulletin of Faculty of Agriculture, Cairo Univ.,(Egypt), 1984. Abstract
Hafiez, A. A., M. A. Abdel-Hafez, E. A. Osman, and M. S. Ibrahim, "Hormonal Interaction in Diabetic Pregnancy", Isotopenpraxis Isotopes in Environmental and Health Studies, vol. 20, issue 8, pp. 306-309, 1984.
Hillier, B., J. Musgrove, and P. O'Sullivan, "Knowledge and {Design}", Development in {Design} {Methodology}, Chichester, Wiley, pp. 245–264, 1984. Abstract
Osman, M. M., M. Ismail, H. M. Hasan, W. Wadia, and M. Rashdan, "A test of a simple approximation for treating the antisymmetrisation effect in ion-ion collisions", Journal of Physics G: Nuclear Physics, vol. 10, no. 10, pp. 1399-1406, 1984. AbstractWebsite

The density matrix expansion method, together with three different effective nucleon-nucleon forces, is used to calculate the real part of the interaction potential between two 16O nuclei. The densities of the system are constructed using two different methods. In the first, a two-centre harmonic-oscillator potential is employed to construct the density and the kinetic energy density of the combined system and of the separated nuclei. In the second method, the density of the combined system is assumed to be the sum of the two separate densities and the kinetic energy densities are given approximately by the Thomas-Fermi approximation. The authors have found that the ion-ion potential derived using the second method shows a stronger energy dependence than that derived from the first. A comparison between the ion-ion potentials in the relevant tail region also showed that the second method includes, at zero energy, 30-60% of the exchange effects due to antisymmetrisation for the Negele force. At the same energy and for the Skyrme force the second method can be considered to be a very good approximation to the first.

UW, S., M. HK, S.? F, S. CG, B. R, N. MR, O. S, W. O, B. M, A. W, et al., "[Bone marrow transplantation in panmyelopathies and leukemias with special regard to gnotobiotic measures].", Dtsch Med Wochenschr, 1984. AbstractWebsite
Soliman, M., O.Elkhashab, M. A. Zeid, and R.Barsoum, "Cellular immunity in intermittent peritoneal and hemodialysis patients", Journal Egyptian medical association, vol. 67, issue 2, pp. 49-58, 1984.
Ragab, M. M., M. A. Kararah, M. E. Osman, and M. A. Mostafa, "Cloves rot of garilic with special references to some biochemical changes", Egypt. J.Phytopathol, vol. 10, pp. 16-28, 1984.
Soliman, M., R. Barsoun, E.Elghonaimy, and O.Elkhashab, "Effect of dialyser re use on platelet aggregation ", Journal Egyptian medical association, vol. 67, pp. 193-206, 1984.
Yassin, M. Y., A. A. Osman, and A.A. Farahat, "Feeding sites of the root-knot nematode, Meloidogyne javanica as influenced by the infection of the reniform nematode, Rotylenchulus reniformis co-inhabiting roots of leguminous hosts.", Bull. Fac. of Agric., Cairo Univ.., vol. 35, issue 1, pp. 681-686, 1984.
Zeid, M. A., M. Soliman, O.Elkhashab, and A.Hasaballa, "Lymphocyte transformation in nephrotic patients", Journal Egyptian medical association, vol. 67, pp. 93-104, 1984.
Yassin, M. Y., A. A. Farahat, and A. A. Osman, "Nematicidal concentration in relation tonematode control of :1- Soybean, Glycine max and cowpea, Vigna sinensis under green house conditions.", Bull. Fac. of Agric., Cairo Univ. , vol. 35, issue 2, pp. 1227-1235, 1984.
Farahat, A. A., A. A. Osman, and M. Y. Yassin, "Nematicidal concentrations in relation to nematode control of : 2- Okra, Hibiscus esculentus under green house conditions.", Bull. Fac. of Agric., Cairo Univ.., vol. 35, issue 2, pp. 1237-1246, 1984.
Refai, M., Gad El Said, W., Osman, Lotfi, Z., E. Safwat, and S. Ellias, "Salmonella in slaughtered camels in Egypt. ", Zagazig Vet. J. , vol. 9, , pp. 266-276 , 1984. salmonella_in_camels.pdf
Farahat, A. A., A. A. Osman, and M. Y. Yassin, "Screening of soybean cultivars to the infection with the reniform nematode, Rotylenchulus reniformis.", Bull. Fac. of Agric., Cairo Univ.., vol. 35, issue 2, pp. 1247-1253, 1984.
Osman, A. N., A. M. I. Ashmawi, and M. A. Shalaby, "Synthesis and biological activity of salicylic acid esters.", European J. Pharmacol., vol. 39, issue 5, pp. 280-284., 1984.
Ghallab, A. M., R. S. Ott, G. F. Cmarik, D. J. Kesler, D. B. Faulkner, and J. E. Hixon, "Effects of repetitive norgestomet treatments on pregnancy rates in cyclic and anestrous beef heifers.", Theriogenology, vol. 22, issue 1, pp. 67-74, 1984 Jul. Abstract

Sixty-eight 12- to 14-month-old crossbred beef heifers averaging 285 kg were assigned at random to treated (n = 35) and control (n = 33) groups to evaluate the use of repetitive norgestomet treatments. Treated heifers received an ear implant containing 6 mg norgestomet on two occasions 16 days apart. Injections of 3 mg norgestomet and 5 mg estradiol valerate (EV) were given intramuscularly the same day as first implantation (Syncro-Mate-B). Implants were removed after eight days. Four bulls were then placed in each of two pastures containing half of the treated and half of the control heifers for 24 days after the time of the first implant removal. Progesterone concentrations from blood samples collected prior to the first treatment were used to determine reproductive status. The overall pregnancy rate 64 days after first implant removal for treated anestrous heifers (61%; 14 23 ) was similar (p > 0.25) to untreated (73%; 11 15 ) and treated (75%; 9 12 ) cyclic heifers, but higher (p < 0.1) than for untreated anestrous heifers (33%; 6 18 ). This treatment advantage resulted from an increased (p < 0.01) pregnancy rate after the second implant removal. In summary, repetitive norgestomet treatments enhanced pregnancy rate in anestrous heifers within a 24-day breeding season.

Hussein, A. M., E. L. M. Shibini, Z. Osman, and T. Sharaf, "An Efficient Load Flow Code and its Application to the Unified Egyptian Power System", 9th Annual Conference in Statistics, Computer Science, Information and Operation Research, Egypt, Dec. 1984.