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Search Results: 1 - 10 of 156 matches for " Jehan Shazly "
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Extensions to the Finite Element Technique for the Magneto-Thermal Analysis of Aged Oil Cooled-Insulated Power Transformers  [PDF]
Jehan Shazly, Amr A. Adly
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2012, DOI: 10.4236/jemaa.2012.44022
Abstract: It is well known that the hot spot temperature represents the most critical parameter identifying the power rating of a transformer. This paper investigates the effect of the degradation of core magnetic properties on temperature variation of aged oil-cooled transformers. Within this work, 2D accurate assessment of time average flux density distribution in an oil insulated-cooled 25 MVA transformer has been computed using finite-element analysis taking into account ageing and stress-induced non-uniform core permeability values. Knowing the core material specific loss and winding details, local core and winding losses are converted into heat. Based upon the ambient temperature outside the transformer tank and thermal heat transfer related factors, the detailed thermal modeling and analysis have then been carried out to determine temperature distribution everywhere. Analytical details and simulation results demonstrating effects of core magnetic properties degradation on hot spot temperatures of the transformer’s components are given in the paper.
Hormonal Requirements Trigger Different Organogenic Pathways on Tomato Nodal Explants  [PDF]
Salem Jehan, A. M. Hassanein
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.411263
Abstract:

In this work, nodal-disk segments (4-6 mm in diameter × 5-6 mm in length) were obtained from established shoot culture, resulted from disinfected tomato seedlings, and they were suitable to induce different organogenic pathway under the influence of specific hormonal treatment. Application of BAP (1-2.5 mg/l) alone or in combination of 0.5 mg/l NAA resulted in induction of shoot formation. Somatic embryogenesis was rarely appeared (6%) when relatively low concentration of BAP (1.5 mg/l) with low concentration of IAA (0.5 mg/l IAA) was applied. Root induction was triggered when nodal explants or shoot cuttings were cultured on MS medium with (1 mg/l IAA, IBA or NAA) or without auxins, but the best result was obtained when 1 mg/l IAA was used. Application of 0.5 mg/l NAA stimulated callus formation but the best result was obtained when the three different phytohormoes were used (0.5 mg/l 2,4-D + 1 mg/l NAA + 0.5 mg/l BAP). These results indicated that nodal segments, as described in this protocol, can be used as alternative to other types of explants such as cotyledon, hypocotyl and leaf explants.

Evaluation of pulsed Nd:YAG laser posterior hyaloidotomy as an emergency treatment for blinding premacular subhyaloid hemorrhage
Hazem HA, Shazly TA
Open Access Emergency Medicine , 2011, DOI: http://dx.doi.org/10.2147/OAEM.S19235
Abstract: luation of pulsed Nd:YAG laser posterior hyaloidotomy as an emergency treatment for blinding premacular subhyaloid hemorrhage Original Research (3003) Total Article Views Authors: Hazem HA, Shazly TA Published Date May 2011 Volume 2011:3 Pages 33 - 37 DOI: http://dx.doi.org/10.2147/OAEM.S19235 Hazem A Hazem1, Tarek A Shazly1,2 1Department of Ophthalmology, Assiut University Hospital, Assiut, Egypt; 2Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA Purpose: This study aimed to evaluate the benefits of Nd:YAG laser posterior hyaloidotomy as a method allowing rapid drainage of subhyaloid hemorrhage into the vitreous gel. Design: Nonrandomized, prospective, interventional, controlled case series. Methods: Nd:YAG laser posterior hyaloidotomy was performed in four eyes of three patients with premacular subhyaloid hemorrhage. The etiologies were bleeding tendency, proliferative diabetic retinopathy, and idiopathic. Four eyes of four patients with premacular subhyaloid hemorrhage were managed conservatively. The etiologies were proliferative diabetic retinopathy and Valsalva retinopathy. Results: A rapid resolution of subhyaloid hemorrhage with improvement of visual acuity was achieved in all patients treated with Nd:YAG laser posterior hyaloidotomy, without evidence of damage to the retina or choroid. With regard to the conservatively managed eyes, there was a tendency towards slow spontaneous absorption of hemorrhage during the follow-up period. Conclusion: Nd:YAG laser posterior hyaloidotomy was a safe and effective procedure for rapid resolution of premacular subhyaloid hemorrhage, allowing rapid restoration of visual acuity, visualization of the underlying retina, expedited access for macular photocoagulation and avoidance of vitrectomy.
Severe pediatric ocular injury due to explosion of a firecracker inside a soda bottle
Tarek A Shazly
Open Access Emergency Medicine , 2010, DOI: http://dx.doi.org/10.2147/OAEM.S14689
Abstract: e pediatric ocular injury due to explosion of a firecracker inside a soda bottle Case report (3370) Total Article Views Authors: Tarek A Shazly Published Date October 2010 Volume 2010:2 Pages 83 - 85 DOI: http://dx.doi.org/10.2147/OAEM.S14689 Tarek A Shazly Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA Abstract: This case report describes a penetrating ocular injury, followed by endophthalmitis, in a four-year-old girl, resulting from explosion of a small K0201 match-cracker inside a soda bottle. The patient presented with two corneal lacerations, ruptured crystalline lens, multiple intraocular foreign bodies, and hyphema of the right eye, for which immediate surgical exploration and repair was performed. The patient developed aggressive endophthalmitis that led to atrophy of the eye within a few weeks. Severe ocular injuries can result from small, relatively “safe” firecrackers. Therefore, this type of firework should not be used, especially by minors.
Severe pediatric ocular injury due to explosion of a firecracker inside a soda bottle
Tarek A Shazly
Open Access Emergency Medicine , 2010,
Abstract: Tarek A ShazlyDepartment of Ophthalmology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USAAbstract: This case report describes a penetrating ocular injury, followed by endophthalmitis, in a four-year-old girl, resulting from explosion of a small K0201 match-cracker inside a soda bottle. The patient presented with two corneal lacerations, ruptured crystalline lens, multiple intraocular foreign bodies, and hyphema of the right eye, for which immediate surgical exploration and repair was performed. The patient developed aggressive endophthalmitis that led to atrophy of the eye within a few weeks. Severe ocular injuries can result from small, relatively “safe” firecrackers. Therefore, this type of firework should not be used, especially by minors.Keywords: pediatric trauma, endophthalmitis, firecracker
Evaluation of pulsed Nd:YAG laser posterior hyaloidotomy as an emergency treatment for blinding premacular subhyaloid hemorrhage
Hazem HA,Shazly TA
Open Access Emergency Medicine , 2011,
Abstract: Hazem A Hazem1, Tarek A Shazly1,21Department of Ophthalmology, Assiut University Hospital, Assiut, Egypt; 2Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USAPurpose: This study aimed to evaluate the benefits of Nd:YAG laser posterior hyaloidotomy as a method allowing rapid drainage of subhyaloid hemorrhage into the vitreous gel.Design: Nonrandomized, prospective, interventional, controlled case series.Methods: Nd:YAG laser posterior hyaloidotomy was performed in four eyes of three patients with premacular subhyaloid hemorrhage. The etiologies were bleeding tendency, proliferative diabetic retinopathy, and idiopathic. Four eyes of four patients with premacular subhyaloid hemorrhage were managed conservatively. The etiologies were proliferative diabetic retinopathy and Valsalva retinopathy.Results: A rapid resolution of subhyaloid hemorrhage with improvement of visual acuity was achieved in all patients treated with Nd:YAG laser posterior hyaloidotomy, without evidence of damage to the retina or choroid. With regard to the conservatively managed eyes, there was a tendency towards slow spontaneous absorption of hemorrhage during the follow-up period.Conclusion: Nd:YAG laser posterior hyaloidotomy was a safe and effective procedure for rapid resolution of premacular subhyaloid hemorrhage, allowing rapid restoration of visual acuity, visualization of the underlying retina, expedited access for macular photocoagulation and avoidance of vitrectomy.Keywords: retinal hemorrhage, vitreous hemorrhage, laser surgery, proliferative diabetic retinopathy
A Case of Cystic Arrhenoblastoma of the Ovary
Jehan S. Saleh
Acta Medica Iranica , 1957,
Abstract: The authors have observed one patient whose vision has slowly been lessened. They :have written all the ophthalmoscopic changes which would help in diagnosis of a angioid strire of the retina. The patient showed some skin lesions as well, which proved the existence of a general affection. At the end, the authors have written all the associated forms ofm the disease and other familial and mesodermic affections which may be seen with it.
Effect of Arbuscular Mycorrhiza Fungal Inoculation with Compost on Yield and P Uptake of Wheat in Alkaline Calcareous Soil  [PDF]
Bismillah Jan, Muhammad Sharif, Farmanullah Khan, Jehan Bakht
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.513213
Abstract:

An experiment was conducted in pots under natural conditions in alkaline calcareous soil to determine wheat (Triticum aestivum L. c.v. Atta Habib) yield and P uptake as influenced by Arbuscular mycorrhizal fungi (AMF) inoculation with compost prepared from fresh animal dung and rock phosphate. Data indicated that wheat grain, shoot and roots yields increased significantly (P ≤ 0.05) by inoculation of commercial mycorrhiza (AMF-II) and half dose of compost. Grain yield increased by 43% and 37%, shoot by 43% and 39% and roots yield by 51% and 45% over control of N and K fertilizers. Straw yield was maximum as 5075 kg·ha-1 in the treatment of AMF-II inoculation with full dose of compost, which was significantly (P ≤ 0.05) higher as 44% and 40% over control of N and K fertilizers. Maximum and significantly (P ≤ 0.05) higher plant N and P uptake by wheat were observed in the treatment inoculated by indigenous mycorrhiza (AMF-I) with full dose of compost followed by the inoculation of AMF-II with full dose of compost and SSP treatment. Maximum and significantly (P ≤ 0.05) increased soil spores’ density of AMF by 26 spores per 20 g soil with maximum roots infection intensity in wheat were observed by the inoculation of AMF-I with full dose of compost. The AMF-II is slightly better than AMF-I regarding grain, shoot and root yield, whereas AMF-I is better in N, P uptake, soil spore density and their root infection intensity than AMF-II. Alone inoculation and compost application increase the yield and nutrients uptake but the highest improvement was observed with inoculation of AMF with compost. Results suggest that inoculation of AMF with compost has potential to improve wheat yields and plants’ P uptake under given soil conditions.

Synthesis of Some New Pyridine-2-yl-Benzylidene-Imines  [PDF]
Abdulhamid Alsaygh, Jehan Al-Humaidi, Ibrahim Al-Najjar
International Journal of Organic Chemistry (IJOC) , 2014, DOI: 10.4236/ijoc.2014.42013
Abstract: A series of new Schiff bases derived from 2-aminopyridenes and various aromatic aldehydes have been synthesized and thoroughly investigated by 1H and 13C NMR spectroscopy. The imines were found to exist as only a single E-isomer at ambient temperature. Interestingly, 1H- and 13C-NMR chemical shifts of the (CH=N) amino group are affected by the type of substituent group (X) on the aryl ring. Furthermore UV and IR Spectra of some of the title compounds are also reported.
Estimation of Hourly and Daily Global Solar Radiation at Clear Days Using an Approach Based on Modified Version of Gaussian Distribution
S M El shazly,
S.
,M.,El,shazly

大气科学进展 , 1996,
Abstract: The performance of two models, Jain and Baig, based on the modified version of Gaussian distribution function in estimating the daily total of global solar radiation and its distribution through the hours of the day from sunrise to sunset at any clear day is evaluated with our own measured data in the period from June 1992 to May 1993 in Qena / Egypt. The results show a high relative deviation of calculated values from measured ones, especially for Jain model, in the most hours of the day, except for those near to local noon. This misfit behavior is quite obvious in the early morning and late afternoon. A new approach has been proposed in this paper to estimate the daily and hourly global solar radiation. This model performs with very high accuracy on the recorded data in our region. The validity of this approach was verified with new measurements in some clear days in June and August 1994. The resultant very low relative deviation of the calculated values of global solar radiation from the measured ones confirms the high per-formance of the approach proposed in this work.
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