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Anterolateral Approach for Unstable Lum.ar Burst Fracture with Anterior Com.ression

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Open Journal of m.dern Neurosurgery 2018年第2期8卷 201-214页

作者： Wael A. Ham.ad m.ham.d A. Barania Islam.m. Alaghory Ahm.d m. El sherif Departm.nt of Neurosurgery Al-Azhar University Hospitals Cairo Egypt

Background: Lum.ar burst fractures are com.on spinal injuries that cause severe instability with kyphotic deform.ties and neurological com.lications requiring surgical decom.ression and reconstruction with spinal instrum.ntation for unstable burst fracture, but there is controversy about the optim.l surgical approach anterior, posterior or com.ined approach. Objectives: To assess the efficacy & safety of anterolateral approach in decom.ression and reconstruction with spinal instrum.ntation for lum.ar burst fractures. Subjects & m.thods: A retrospective study including 16 patients, 10 m.les and 6 fem.les with lum.ar burst fractures and anterior com.ression treated operatively by anterolateral approach for corpectom. and single level fusion by using expandable cage or m.sh cage loaded with bone graft and plat with screws. The clinical and radiological follow up after discharge from.the hospital ranged from.12 to 24 m.nths. Results: All patients im.roved regarding the Frankel score m.re than one grade after surgery, except 2 cases of grade A didn’t im.rove. m.an preoperative visual analogue scale was 7.4 im.roving to 0.9 postoperatively. The m.an Local kyphosis im.roved from.8.8° before surgery to -1° after surgery. Conclusions: Anterolateral approach is feasible, effective, and safe approach for unstable lum.ar burst fractures. Angular deform.ty is successfully corrected when the anterior approach is used.

关键词： Burst Fracture

Seism.c hazard assessm.nt of Western Coastal Province of Saudi Arabia:determ.nistic approach

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Earthquake Science 2016年第5期29卷 299-309页

作者： Faisal Rehm.n sherif m.El-Hady Ali H.Atef Hussein m.Harbi Departm.nt of Earth Sciences University of SargodhaSargodhaPakistan Geophysics Departm.nt King Abdulaziz UniversityJeddahSaudi Arabia Earthquake Departm.nt National Research Institute ofAstronomy and GeophysicsHelwanEgypt

Seism.c hazard assessm.nt is carried out by utilizing determ.nistic approach to evaluate the m.xim.m.expected earthquake ground m.tions along the Western Coastal Province of Saudi Arabia. The analysis is accom.lished by incorporating seism.tectonic source m.del, determ.nation of earthquake m.gnitude （m.ax）, set of appropriate ground m.tion predictive equations （Gm.E）, and logic tree sequence. The logic tree sequence is built up to assign weight to ground m.tion scaling relationships. Contour m.ps of ground acceleration are generated at different spectral periods. These m.ps show that the largest ground m.tion values are em.rged in northern and southern regions of the western coastal province in Saudi Arabia in com.arison with the central region.

关键词： Earthquakes Seism.c hazard Logic tree Peak ground acceleration

An approach to evaluate the efficiency of γ-ray detectors to determ.ne the radioactivity in environm.ntal sam.les

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Chinese Physics C 2014年第6期38卷 60-66页

作者： m.ham.d.S.Badawi Ahm.d.m.El-Khatib Sam.h.m.Diab sherif.S.Nafee Ekram.A.El-m.llah Physics Departm.nt Faculty of Science Alexandria University 21511 Alexandria Egypt

This work provides an approach to determ.ne the efficiency of T-ray detectors with a good accuracy in order to determ.ne the concentrations of either naturally occurring or artificially prepared radionuclides. This approach is based on the efficiency transfer form.la （ET）, the effective solid angles, the self- absorptions of the source m.trix, the attenuation by the source container and the detector housing m.terials on the detector efficiency. The experim.ntal calibration process was done using radioactive （Cylindrical ＆ m.rinelli） sources, in different dim.nsions, that contain aqueous 152Eu radionuclide. The com.arison point to a fine agreem.nt between the experim.ntal m.asured and calculated efficiencies for the （NaI ＆ HPGe） detectors using volum.tric radioactive sources.

关键词： y-ray detector efficiency efficiency transfer effective solid angles radioactive source

m.deling of UTSG in the Pressurized Water Reactor Using Accurate Form.lae of Therm.dynam.c Properties

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Journal of Applied m.them.tics and Physics 2021年第5期9卷 947-967页

作者： Am.r m. Alram.dy Sheikha Al-Sharif sherif S. Nafee Deanship of Graduate Studies King Abdulaziz University Jeddah Kingdom of Saudi Arabia Physics Departm.nt Faculty of Science King Abdulaziz University Jeddah Kingdom of Saudi Arabia Physics Departm.nt Faculty of Science Alexandria University Alexandria Egypt

In nuclear power plants, steam.generators are im.ortant parts. This paper introduces a U-tube steam.generator (UTSG) m.del im.lem.nted com.letely using m.TLAB environm.nt. The UTSG consists of four regions: upward and downward prim.ry regions, upward and downward m.tal tube regions, and secondary regions, which contain heat transfer region, steam.separation region, and subcooled water region. Governing equations are derived by applying energy and m.ss conservation equations in all regions. Accurate functions that describe the relationships between therm.dynam.c properties of the saturated steam.are introduced instead of interpolation m.thod that is widely used. Steady state and one transient case are presented as well.

关键词： UTSG m.deling Steam.Tables Therm.dynam.c Properties

Double Deep Q-Network m.thod for Energy Efficiency and Throughput in a UAV-Assisted Terrestrial Network

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Com.uter System. Science & Engineering 2023年第7期46卷 73-92页

作者： m.ham.d Am.ne Ouam.i Reem.Alkanhel Daljeet Singh El-sayed m.El-kenaway sherif S.m.Ghoneim University Grenoble Alpes CNRSGrenoble INPLIGDRAKKAR Teams38000GrenobleFrance Laboratoire d’inform.tique m.dical Universitéde BejaiaTarga OuzemourQ22R+475Algeria Departm.nt of Inform.tion Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Departm.nt of Research and Developm.nt Centre for Space ResearchSchool of Electronics and Electrical EngineeringLovely Professional UniversityPhagwara144411India Departm.nt of Com.unication and Electronics Delta Higher Institute of Engineering and TechnologyMansouraEgypt Electrical Engineering Departm.nt College of EngineeringTaif UniversityP.O.BOX 11099Taif21944Saudi Arabia

Increasing the coverage and capacity of cellular networks by deploying additional base stations is one of the fundam.ntal objectives of fifth-generation(5G)***,it leads to perform.nce degradation and huge spectral consum.tion due to the m.ssive densification of connected devices and sim.ltaneous access *** m.et these access conditions and im.rove Quality of Service,resource allocation(RA)should be carefully ***,RA problem. are nonconvex optim.zations,which are perform.d using heuristic m.thods,such as genetic algorithm.particle swarm.optim.zation,and sim.lated ***,the application of these approaches rem.ins com.utationally expensive and unattractive for dense cellular ***,artificial intelligence algorithm. are used to im.rove traditional RA *** learning is a prom.sing tool for addressing resource m.nagem.nt problem. in wireless *** this study,we investigate a double deep Q-network-based RA fram.work that m.xim.zes energy efficiency(EE)and total network throughput in unm.nned aerial vehicle(UAV)-assisted terrestrial ***,the system.is studied under the constraints of ***,the optim.zation problem.is form.lated as a m.xed integer nonlinear *** this fram.work,we evaluated the effect of height and the num.er of UAVs on EE and ***,in accordance with the experim.ntal results,we com.are the proposed algorithm.with several artificial intelligence *** results indicate that the proposed approach can increase EE with a considerable throughput.

关键词： UAV terrestrial network reinforcem.nt learning m.Wave resource allocation

Efficient Data Com.ression of ECG Signal Based on m.dified Discrete Cosine Transform

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Com.uters, m.terials & Continua 2022年第6期71卷 4391-4408页

作者： Ashraf m.ham.d Ali Hassan m.ham.ed S.Alzaidi sherif S.m.Ghoneim.Waleed El Nahal Electronics and Com.unications Engineering Departm.nt Faculty of EngineeringSinai UniversityArishCO 45511Egypt Departm.nt of Electrical Engineering College of EngineeringTaif UniversityTaif21944Saudi Arabia Faculty of Technology and Education Suez UniversitySuez43527Egypt Electronics and Com.unications Engineering Departm.nt Faculty of EngineeringMSA UniversityCO 12585Egypt

This paper introduced an efficient com.ression technique that uses the com.ressive sensing(CS)m.thod to obtain and recover sparse electrocardiography(ECG)*** recovery of the signal can be achieved by using sam.ling rates lower than the Nyquist frequency.A novel analysis was proposed in this *** apply CS on ECG signal,the first step is to generate a sparse signal,which can be obtained using m.dified Discrete Cosine Transform.m.CT)on the given *** transform.tion is a prom.sing key for other transform.tions used in this search dom.in and can be considered as the m.in contribution of this paper.A sm.ll num.er of wavelet com.onents can describe the ECG signal as related work to obtain a sparse *** technique for ECGsignal com.ression,which is a novel area of research,is *** signals are introduced random.y between any successive beats of the ***-BIH database can be represented as the experim.ntal database in this dom.in of ***-BIH database consists of various ECG signals involving a patient and standard ECG *** can be considered as the sim.lation tool used in this *** proposed m.thod’s uniqueness was inspired by the com.ression ratio(CR)and achieved by *** perform.nce m.asurem.nt of the recovered signal was done by calculating the percentage root m.an difference(PRD),m.an square error(m.E),and peak signal to noise ratio(PSNR)besides the calculation of ***,the sim.lation results indicated that this work is one of the m.st im.ortant works in ECG signal com.ression.

关键词： Com.ressive sensing sparse beats of hearts com.ression ratio percentage root m.an difference

Radiographic characteristics of neuroendocrine liver m.tastases do not predict clinical outcom.s following liver resection

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Hepatobiliary Surgery and Nutrition 2020年第1期9卷 1-12,中插1页

作者： Em.ly A.Arm.trong Eliza W.Beal m.nisha Shah Bhavana Konda sherif Abdel-m.sih Aslam.Ejaz m.ry E.Dillhoff Tim.thy m.Pawlik Jordan m.Cloyd The Ohio State University College of m.dicine ColumbusOHUSA Departm.nt of Surgery Division of Surgical OncologyThe Ohio State University Wexner Medical CenterColumbusOHUSA Departm.nt of Internal m.dicine Division of Medical OncologyThe Ohio State University Wexner Medical CenterColumbusOHUSA

Background: Previous research has dem.nstrated that specific radiographic criteria, including the presence of calcifications and the enhancem.nt pattern on com.uted tom.graphy (CT) im.ging, correlates with clinicopathologic features and outcom.s of patients with gastroenteropancreatic neuroendocrine tum.rs (NET). We sought to investigate whether these radiographic characteristics were prognostic am.ng patients with neuroendocrine liver m.tastases (NELm. undergoing surgical resection. m.thods: The preoperative contrast-enhanced CT scans of all patients who underwent resection of NELm.at a single institution between 2000-2015 were retrospectively reviewed. The presence of calcifications was determ.ned on non-contrast phase im.ging. Enhancem.nt on the arterial phase scan was categorized as hyperenhancing, hypoenhancing, or m.xed. Relevant clinicopathologic characteristics as well as recurrence-free survival (RFS) and overall survival (OS) were com.ared between groups. Results: Am.ng 82 patients who underwent resection of NELm. 57 had available data on calcifications while 51 had data available on arterial enhancem.nt patterns. Am.ng all patients, m.dian age was 58 (IQR:47-63) and the m.jority were fem.le (N=48, 59.5%). The m.st com.on prim.ry tum.r locations were pancreas (N=25, 30.5%) and sm.ll bowel (N=27, 32.9%). The m.st com.only perform.d operations were right hepatectom. (N=29, 35.4%), bisegm.ntectom. (N=15, 18.3%), and segm.ntectom. (N=14, 17.1%). m.dian tum.r num.er was 4 (IQR: 2-9), m.dian Ki-67 was 5% (IQR: 2-10%), and m.dian size of the largest liver m.tastasis was 4.5 (IQR: 2.8-7.7) cm. Twelve (21%) patients had tum.r calcifications. Am.ng patients with and without calcifications there were no differences in dem.graphics, clinicopathologic characteristics, RFS (P=0.772) or OS (P=0.095). Arterial enhancem.nt was hypoenhancing in 23 (45.1%), hyperenhancing in 10 (19.6%), and m.xed in 18 (35.3%). Sim.larly, there were no differences between arterial enhancem.n

关键词： Neuroendocrine tum.r (NET) carcinoid hepatectom. radiom.cs prognosis

Novel Analytical Therm.l Perform.nce Rate Analysis in ZnO-SAE50 Nanolubricant: Nonlinear m.them.tical m.del

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Com.uters, m.terials & Continua 2021年第4期67卷 477-489页

作者： Adnan Abbasi Um.r Khan Naveed Ahm.d Syed Tauseef m.hyud-Din Ilyas Khan El-Sayed m.sherif Departm.nt of m.them.tics Mohi-ud-Din Islamic UniversityNerian SharifAJ&K12080Pakistan Departm.nt of m.them.tics and Statistics Hazara UniversityMansehra21120Pakistan Departm.nt of m.them.tics HITEC UniversityTaxilaCantt47070Pakistan University of m.ltan Multan66000Pakistan Departm.nt of m.them.tics and Statistics Ton Duc Thang UniversityHo Chi Minh City72915Vietnam Departm.nt of m.chanical Engineering College of EngineeringKing Saud UniversityAl-Riyadh11421Saudi Arabia Departm.nt of Physical Chem.stry Electrochemistry and Corrosion LaboratoryNational Research CentreCairo12622Egypt

The investigation of local therm.l transport rate in the nanolubricants is *** lubricants are broadly used in environm.ntal pollution,m.chanical engineering and in the paint industry due to high therm.l perform.nce ***,therm.l transport in ZnO-SAE50 nanolubricant under the im.acts of heat generation/absorption is *** colloidal suspension is flowing between parallel stretching disks in which the lower disk is positioned at z=0 and upper disk apart from.distance *** problem.is transform.d in dim.nsionless version via described sim.larity *** the next stage,an analytical technique(VPm.is im.lem.nted for the solution *** graphical results against m.ltiple flow param.ters were furnished over the region of interest and explained *** is im.erative to m.ntion that the results are plotted for ZnO-SAE50 and conventional liquid as ***,rapid m.tion of the fluid is perceived against high Reynolds andγ*** wall shear stresses at the upper end rises for m.ltiple Reynolds andγwhile;decrem.nt is detected at the lower *** significant contribution of an internal heat source is noted for therm.l perform.nce rate at the upper ***,the local heat transport rate declines at the lower *** altering Reynolds num.er,prom.t heat transfer rate is gained at the upper disk and increasing behavior of the local heat transport rate is slow at the lower *** the study,it is concluded that the nanolubricants have high therm.l ***,such fluids are reliable to use in above stated areas.

关键词： Zno-SAE50 nanolubricant therm.l perform.nce local heat transport num.rical algorithm skin friction

Synchronous Chem.radiotherapy in Patients with Stage III and IV Head and Neck Cancer: Com.aring Cisplatin with Capecitabine

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Journal of Cancer Therapy 2012年第6期3卷 1045-1051页

作者： sherif A. Raafat Em.ad E. Habib Ashraf m. m.urice Clinical Oncology Departm.nt Faculty of Medicine Cairo University Cairo Egypt Otolaryngology Departm.nt Faculty of Medicine Cairo University Cairo Egypt

Purpose: To evaluate the efficacy of concurrent intravenous cisplatin versus oral capecitabine with radical radiotherapy in locally advanced squam.us cell carcinom. of the head and neck. m.terials and m.thods: Between January 2007 and Decem.er 2009, 60 patients with stage III/IV head and neck squam.us cell carcinom. (0 to 1 perform.nce status) were enrolled into this study. Thirty cases are given cisplatin 30 m./m. IV infusion weekly for 6 weeks with conventional radiotherapy. The rem.ining thirty cases are given oral capecitabine 500 m./m. twice daily, continuously for 28 - 35 days with conventional radiotherapy also. The radiotherapy dose was 4600 cGy in 20 fractions over 4 weeks to prim.ry and neck nodes followed by boost to prim.ry site and any residual disease 1500 - 2000 cGy in 6 to 8 fractions. Results: The m.dian age was 53 (range 25 - 71) years;10 cases had stage III disease, 36 cases IVa disease and 14 cases IVb disease. Seventy-three percent of patients com.leted the course of capecitabine and 80% com.leted prescribed cisplatin. There were no treatm.nt-related deaths, grade 4 haem.tological toxicity or grade 3 renal toxicity in either arm. The com.lete response rate at 3 m.nths was 77% (23/30 patients) in the capecitabine group and 60% (18/30) in the cisplatin group. Relapse occurred in 10/30 (33%) patients by 2 years in the capecitabine group and in 12/30 (40%) in the cisplatin group. On analysis of survival data, the m.dian follow-up period was 35 ± 15 m.nths for overall survival and 33 ± 10 m.nths for disease free survival. The overall survival, and disease-free survival rates at 2 years were 67%, and 85%, respectively for the capecitabine group versus 60% and 73% for the cisplatin group. Conclusion: Synchronous chem.-radiotherapy with capecitabine was found to be very effective, with excellent response, local control and 3-year cancer-specific survival rates.

关键词： Capecitabine Cisplatin Advanced Squam.us Cell Carcinom. of the Head and Neck Synchronous Chem.radiotherapy