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Search Results: 1 - 10 of 402153 matches for " Wagdy M. Mansour "
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Real-Time Transient Stability Analysis/Assessment Based Proposed Parallel Algorithms
Mohamed A. Ali,Wagdy M. Mansour
International Journal of Electrical and Power Engineering , 2012, DOI: 10.3923/ijepe.2012.124.131
Abstract: In this study, a method for online Transient Stability Analysis/assessment (TSA) of large scale power systems is proposed. The method is based on an exact mathematical transformation of (n+m) machine system into n-equivalent Single Machine to Equivalent Bus (SMEB) Models and m-Load to Equivalent Bus (LEB) Models, where n number of machine buses and m number of load buses in the system. Then implementing proposed Parallel Algorithms (PAs) for power system TSA on developed Matlab/M-files models constructed by the researchers for system simulation. Comparative simulation results between the proposed PAs and Conventional Time Domain Method (CTDM) are presented to show the effectiveness and the validation of the proposed PAs.
Vascularity of a breast lump  [PDF]
Ghada M. Mansour
Open Journal of Obstetrics and Gynecology (OJOG) , 2013, DOI: 10.4236/ojog.2013.39120

The aim of this study was to find if Doppler ultrasound of the axillary and lateral thoracic arteries in breast cancer cases would differ from benign breast lesions and normal controls. Two hundred patients with breast lumps were included in the study. Clinical examination, mammography, breast ultrasound and fine needle aspiration or tru-cut biopsies were done for all cases. Breast ultrasound included morphological criteria of lump, lateral thoracic artery (LTA) Doppler, axillary lymph nodes, and axillary artery Doppler. All malignant cases had undergone mastectomy or lumpectomy. Lump size ranged from 1 to 5.1 (2.93 ± 1.6) cm. Eighty one cases were diagnosed as breast cancer and one hundred and nineteen cases were benign conditions. There was no significant difference regarding axillary artery and lump Doppler between the two groups while there was a difference of LTA Doppler with a cut off value of 0.67. Lateral thoracic artery resistance index measured by Doppler ultrasound was significantly lower in the malignant group in this study with a cut off value of 0.67.

Self-Absorption Effects on Electron Temperature-Measurements Utilizing Laser Induced Breakdown Spectroscopy (LIBS)-Techniques  [PDF]
Shawqi A. M. Mansour
Optics and Photonics Journal (OPJ) , 2015, DOI: 10.4236/opj.2015.53007
Abstract: In the present work, we have studied the temporal evolution of aluminum alloy plasma produced by the fundamental (1064 nm) of a Q-switched Nd:YAG laser by placing the target material in air at atmospheric pressure. The four Al I-neutral lines at 308.21, 309.27, 394.40 and 369.15 nm as well as Al II-ionic lines at 281.61, 385.64 and 466.30 nm are used for the determination of the electron temperature Te using Saha-Boltzmann plot method. The neutral aluminum lines were found to suffer from optical thickness which manifested itself on the form of scattered points around the Saha-Boltzmann line. The isolated optically thin hydrogen Hα-line at 656.27 nm appeared in the spectra under the same experimental conditions was used to correct the Al I-lines which contained some optical thickness. The measurements were repeated at different delay times ranging from 1 to 5 μs. The comparison between the deduced electron temperatures from aluminum neutral lines before correction against the effect self-absorption to that after correction revealed a precise value in temperature. The results sure that, in case of the presence of self-absorption effect the temperature varies from (1.4067 - 1.2548 eV) as the delay time is varied from 0 to 5 μs. Whereas, in the case of repairing against the effect, it varies from (1.2826 - 0.8961 eV) for the same delay time variation.
Social Support and Adolescents’ Alcohol Use: An Integrative Literature Review  [PDF]
Ayman M. Hamdan-Mansour
Health (Health) , 2016, DOI: 10.4236/health.2016.812120
Abstract: The trajectories at treatment of alcohol use and abuse among adolescents have become a major health concern. The purpose of this paper was to discuss alcohol use and abuse among adolescents and its relationship to social support. Integrative review has been utilized to address the issue. There is a presentation of findings from research examining social support concepts and their relationship to adolescents’ alcohol use and abuse. Treatment requires awareness of underlying causes in order to establish effective treatment approaches. Determining these underlying causes requires adequate knowledge of family, peers, and societal influences on adolescents’ alcohol use and abuse. Health professionals across disciplines have an important role in implementing multidisciplinary interventions. The purpose of this paper was to discuss alcohol use and abuse among adolescents and its relationship to social support. Results, controversies and concerns raised by the reported results are addressed. Implications for future research are delineated.
A Bluetooth Solution For Manipulating An Object Manipulator Within An X-Ray Tomograph
M. Mansour
Lecture Notes in Engineering and Computer Science , 2009,
A PC based System for the Control of an Object Manipulator Movements in an X-Ray Tomograph
M. Mansour
Lecture Notes in Engineering and Computer Science , 2008,
Solubility Pattern of Simmondsins, Proteins and Phenolics of Defatted Jojoba Meal
Suzanne M. Wagdy,Sahar H. Mohamed,Fakhriya S. Taha
American Journal of Food Technology , 2011,
Abstract: Jojoba defatted meal contains toxic compounds mainly simmondsin and simmondsin 2-ferulate. The aim of the present investigation was to study the solubility pattern of simmondsin, simmondsin 2- ferulate, protein, non-protein nitrogen and phenolic compounds present in Jojoba meal at pH ranging from 1-12. Both the supernatant and precipitate resulting after extraction at a certain pH were analyzed for the above mentioned components. The simmondsins were identified and quantified by thin layer chromatography. The antimicrobial activities of the 12 pH extracts were evaluated. Results revealed that the precipitate containing lowest simmondsin 0.55, 0.55 and 0.74 g/100 g meal was achieved at pH 1, 2 and 12, respectively. Meanwhile simmondsin 2-ferulate amounted to 0. 67, 0.72 and 0.72 g/100 g meal, at pH 9, 1 and 2, respectively. Isoelectric point of jojoba meal protein showed to be between pH 3-4 with least solubilized protein 14.26-14.08% and highest precipitated protein in the residue 17.74-17.92% protein. Non-protein nitrogen ranged between 2-3.5% in supernatant and between 7-8.6% in the precipitate. Phenolic compounds extracted in the supernatant increase with increasing pH except at pH 4 and 8 where they exhibited some decrease. Normally, the phenolic compounds in the residue followed an opposite trend. Extract at pH 1 inhibited the growth of the five examined bacteria strains. Extracts of jojoba meal resulting from pH 2, 5, 6 and 8 showed inhibition of only one of the five bacterial strains. In conclusion, simmondsins can be effectively removed from the jojoba meal at pH 1, 2 and 12. Jojoba extract at pH 1 exhibited good antibacterial activity.
Search for Heavy Majorana Neutrinos at LHC Using Monte Carlo Simulation  [PDF]
Hesham M. M. Mansour, Nady Bakhet
Open Journal of Microphysics (OJM) , 2013, DOI: 10.4236/ojm.2013.31003

Heavy neutrinos can be discovered at LHC. Many extensions for Standard Model predict the existence of a new neutrino which has a mass at high energies. B-L model is one of them which predict the existence of three heavy (right-handed) neutrinos one per generation, new gauge massive boson and a new scalar Higgs boson which is different from the SM Higgs. In the present work we search for heavy neutrino in 4 leptons + missing energy final state events which are produced in proton-proton collisions at LHC using data produced from Monte Carlo simulation using B-L model at different center of mass energies. We predict that the heavy neutrinos pairs can be produced from new gauge neutral massive boson decay and then the heavy neutrino pairs can decay to 4 leptons + missing energy final state which give us an indication for new signature of new physics beyond Standard Model at higher energies at LHC.

Search of New Higgs Boson in B-L Model at the LHC Using Monte Carlo Simulation  [PDF]
H. M. M. Mansour, Nady Bakhet
Open Journal of Microphysics (OJM) , 2013, DOI: 10.4236/ojm.2013.33016
Abstract: The aim of this work is to search for a new heavy Higgs boson in the B-L extension of the Standard Model at LHC using the data produced from simulated collisions between two protons at different center of mass energies by Monte Carlo event generator programs to find new Higgs boson signatures at the LHC. Also, we study the production and decay channels for Higgs boson in this model and its interactions with the other new particles of this model namely the new neutral gauge massive boson \"\" and the new fermionic right-handed heavy neutrinos νh.
Search for High Energy Electrons from New Neutral Massive Gauge Boson Decay in the CMS Detector at the LHC Using Monte Carlo Simulation  [PDF]
H. M. M. Mansour, Nady Bakhet
Open Journal of Microphysics (OJM) , 2013, DOI: 10.4236/ojm.2013.32007
Abstract: The existence of new heavy neutral massive boson Z′ is a feature of many extensions of Standard Model models as the two-Higgs-doublet model (2HDM), the Hidden Abelian Higgs Model (HAHM), Left-Right Symmetric Model (LRSM), Sequential Standard Model (SSM) and Baryon number minus Lepton number Model (B-L). In the present work we search for two high energy electrons produced from decaying\"\"heavy neutral massive boson in the events produced in proton-proton collisions at LHC and can be detected by CMS detector. We used the data which is produced from proton-proton collisions by Monte Carlo events generator for different energies at LHC, then we use the angular distribution, invariant mass, combined transverse momentum and combined rapidity distributions for the two high energy electrons produced from \"\"decay channel to detect the\"\"signal. B-L extension of the SM model predicts the existence of a\"\"heavy neutral massive boson at high energies. From our results which we had simulated using MC programs for\"\"in the B-L extension of standard model, we predict a possible existence of new gauge\"\"at LHC in the mass range 1 TeV to 1.5 TeV via electrons identification of the two high energy electrons by CMS detector.
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