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Endoscopic Assisted Eyebrow Craniotomy for Anterior Cranial Fossa Lesions: Clinical and Cosmetic Outcomes

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Open Journal of Modern Neurosurgery 2024年第1期14卷 30-47页

作者： Ahmed Hosameldin Hesham Elshetany Ehab abdelhalim Department of Neurosurgery Faculty of Medicine Fayoum University Fayoum Egypt Department of Neurosurgery Faculty of Medicine Cairo University Cairo Egypt

Background: The eyebrow supraorbital keyhole approach could be considered a modified minimally invasive model for the classic pterional subfrontal approach in which an eyebrow incision and supraorbital mini craniotomy are performed for exposure of the anterior cranial fossa corridor. Methods: This study was retrospectively conducted on twenty four patients, age ranging from 20 to 65 years old, with anterior cranial fossa lesions who were meeting the eligibility criteria for eyebrow craniotomy in the period from August 2019 to January 2023. These patients were operated through eyebrow supraorbital approach in which microscopic endoscopic assisted technique were used. Extent of resection, clinical and cosmetic outcomes and complication incidence were assessed. Results: We included the twenty four patients who met inclusion criteria (17 females and 7 males) their ages ranged from 20 to 65 years. The most common pathology was meningioma in 19 patients. Two patients experienced supraorbital loss of sensation and only one patient experienced palsy of frontalis branch of facial nerve. Frontal sinus was breached in 3 patients with no patient experienced postoperative CSF leak. Total excision was accomplished for 23 patients. Four patients who had preoperative visual compromise, improvement of visual acuity and field defects was observed in 3 patients. No major intraoperative complications occurred. All patients filled cosmetic satisfaction questionnaire during their outpatient visits. For the eyebrow supraorbital approach, no incision related intolerable pain, no craniotomy defects or irregularities, no cosmetic complaints nor limitation of jaw opening were reported, and only minor symptoms in the form of limited eyebrow elevation, swelling and numbness in the forehead. Conclusions: The eyebrow craniotomy could be used safely as a more cosmetic and minimally invasive approach for a variety of anterior cranial fossa lesions. Endoscopic assistance has been found very useful f

关键词： Eyebrow Supraorbital Approach Keyhole Craniotomy Microscopic Endoscopic Minimally Invasive

Endoscopic Assisted Eyebrow Craniotomy for Anterior Cranial Fossa Lesions:Clinical and Cosmetic Outcomes

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The Effect of Swirl Intensity on the Flow Behavior and Combustion Characteristics of a Lean Propane-Air Flame

Open Journal of Modern Neurosurgery（现代神经外科学进展） 2024年第1期

作者： Ahmed Hosameldin Hesham Elshetany Ehab abdelhalim

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Fluid Dynamics & Materials Processing 2022年第6期18卷 1749-1762页

作者： Hemaizia Abdelkader Bentebbiche abdelhalim Laboratory of Energetic Mechanics and Conversion System University of Science and Technology Houari BoumedieneAlgiers16111Algeria

The effect of swirl number(Sn)on the flow behavior and combustion characteristics of a lean premixed propane FlameФ=0.5 in a swirl burner configuration was numerically verified in this ***-dimensional numerical simulations were performed using ANSYS-Fluent *** turbulence closure,a standard K-εturbulence model was *** turbulence-chemistry interaction scheme was modeled using the Finite Rate-Eddy Dissipation hybrid model(FR/EDM)with a reduced three-step reaction *** P1 radiation model was used for the flame radiation inside the combustion *** different swirl numbers were selected(0,0.72,1.05,and 1.4)corresponding to different angles(0°,39°,50°,and 57.8°).The results show that the predicted model agrees very well with the experimental data,especially with respect to the axial and radial velocity and temperature *** outer recirculation zone(ORZ)is present in the combustor corner at Sn=0 and an inner recirculation zone(IRZ)appears at the combustor centerline inlet at a critical Sn=*** the Sn reaches an excessive value,the IRZ moves toward the premixing tube,leading to a flame *** flame structure and its length are strongly affected by changes in the Sn as well as the formation of NOx and CO at the combustor exit.

关键词： Combustion premixed flame swirl number CO emissions angles ANSYS-fluent

Analytical Solution for Peristaltic Transport of Viscous Nanofluid in an Asymmetric Channel with Full Slip and Convective Conditions

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Communications in Theoretical Physics 2017年第7期67卷 96-102页

作者： abdelhalim Ebaid Emad H. Aly K. Vajravelu Department of Mathematics Faculty of Science University of Tabuk Tabuk 71491 Saudi Arabia Department of Mathematics Faculty of Science University of Jeddah Jeddah 21589 Saudi Arabia Department of Mathematics Faculty of Education Ain Shams University Roxy 11757 Cairo Egypt Department of Mathematics Department of Mechanical Materials and Aerospace Engineering University of Central Florida Orlando FL 32816 USA

The peristaltic ttow of nanofluids is a relatively new area of research. Scientists are of the opinion that the no-slip conditions at the boundaries are no longer valid and consequently, the first and the second order slip conditions should be addressed. In this paper, the effects of slip conditions and the convective boundary conditions at the boundary walls on the peristaltic flow of a viscous nanofluid are investigated for. Also, the exact analytical solutions are obtained for the model. The obtained results are presented through graphs and discussed. The results reveal that the two slip parameters have strong effects on the temperature and the nanoparticles volume fraction profiles. Moreover, it has been seen that the temperature and nanoparticles volume fraction profiles attain certain values when the first slip condition exceeds a specified value. However, no limit value for the second slip parameter has been detected. Further, the effects of the various emerging parameters on the flow and heat transfer characteristics have been presented.

关键词： nanofluid peristaltic flow slip model convective conditions asymmetric channel

Exact Solution of Non-Newtonian Blood Flow with Nanoparticles through Porous Arteries:A Comparative Study

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Computers, Materials & Continua 2020年第6期63卷 1143-1157页

作者： Wafaa Alharbi Abdulrahman Aljohani Essam El-Zahar abdelhalim Ebaid Department of Mathematics Faculty of ScienceUniversity of TabukTabuk71491Saudi Arabia Department of Mathematics College of Sciences and Humanities in Al-KharjPrince Sattam bin Abdulaziz UniversityAlkharj11942Saudi Arabia Department of Basic Engineering Science Faculty of EngineeringMenofia UniversityShebin El-Kom32511Egypt

In this paper,the mathematical model describing the third-grade non-Newtonian blood flow suspended with nanoparticles through porous arteries is exactly *** present physical model was solved in the research literature via the optimal homotopy analysis method and the collocation method,where the obtained solution was compared with the numerical fourth-order Runge-Kutta ***,the present paper only introduces a new approach to obtain the exact solution of the concerned system and implements such exact solution as a reference to validate the published approximate *** remarks on the previously published results are observed and discussed in detail through tables and *** view of the present calculations,the obtained results in the literature by Ghasemi et al.[Ghasemi,Hatami,Sarokolaie et al.(2015)]may need ***,it is found that the obtained approximate results in the relevant literature agree with the current exact ones up to only two or three decimal places,at ***,the present approach along with the obtained results reflexes the effectiveness and efficiency of our analysis when compared with the corresponding study in the ***,the present results can be directly invested for similar future problems of the same constructions.

关键词： Nanofluid blood flow porous artery nanoparticle exact solution

Mechanical and Metallurgical Characterization of HSLA X70Welded Pipeline Steel Subjected to Successive Repairs

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Acta Metallurgica Sinica(English Letters) 2016年第6期29卷 568-576页

作者： Bouzid Maamache Mabrouk Bouabdallah abdelhalim Brahimi Youcef Yahmi Billel Cheniti Brahim Mehdi Research Center in Industrial Technologies(CRTI) P.O.Box 6416014 CheragaAlgeria Laboratoire des Aeronefs Universite de Blidal09000 BlidaAlgeria LGSDS Ecole Nationale PolytechniqueEl Harrach16200AlgiersAlgeria LTSM Universite de Blidal09000 BlidaAlgeria ICMMO/SP2M Bat 410Universite Paris-Sud 1191405Orsay CedexFrance

The aim of this work is to study the influence of successive weld repairs on the microstructure and the mechanical behavior of the heat-affected zone（HAZ） of an HSLA X70 steel. Detailed microstructural examination combined to grain size measurement showed that beyond the second weld repair, the microstructure of the HAZ undergoes significant change in the grain morphology and grain growth. The results of the X-ray diffraction analyzed using MAUD software indicated an increase in the crystallite size and a decrease in the dislocation density according to the number of weld repair operations. Consequently, a loss of mechanical properties, namely the yield strength and the toughness with the number of weld repairs, was recorded. Beyond the second weld repair operation, the properties of the welded joint do not fulfill the standards applied in piping industry.

关键词： HSLA X70 steel Successive weld repair Heat affected zone Dislocation density

Hypergeometric Series Solution to a Class of Second-Order Boundary Value Problems via Laplace Transform with Applications to Nanofluids

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Communications in Theoretical Physics 2017年第3期67卷 231-234页

作者： abdelhalim Ebaid Abdul-Majid Wazwaz Elham Alali Basem S.Masaedeh Department of Mathematics Faculty of Science University of Tabuk P.O. Box 741 Tabuk 71491 Saudi Arabia Department of Mathematics and Computer Science Saint Xavier University Chicago IL 60655 USA

Very recently, it was observed that the temperature of nanofluids is finally governed by second-order ordinary differential equations with variable coefficients of exponential orders. Such coefficients were then transformed to polynomials type by using new independent variables. In this paper, a class of second-order ordinary differential equations with variable coefficients of polynomials type has been solved analytically. The analytical solution is expressed in terms of a hypergeometric function with generalized parameters. Moreover, applications of the present results have been applied on some selected nanofluids problems in the literature. The exact solutions in the literature were derived as special cases of our generalized analytical solution.

关键词： ordinary differential equation hypergeometric series boundary value problem exact solution Laplace transform nanofluid

Modeling and optimization of induction cooking by the use of magneto-thermal finite element analysis and genetic algorithms

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Frontiers of Electrical and Electronic Engineering in China 2012年第3期7卷 312-317页

作者： Abdelkader KANSSAB abdelhalim ZAOUI Mouloud FELIACHI Departement d'Electrotechnique University of Hassiba BenboualiChlef 02000 Algeria Military Polytechnic School BP17 B.E.Bahri Algiers Algeria PRES-L'UNAM IREENA Bd de l'Universit6 BP 406 44602 St-Nazaire cedex France

Induction cooking has several advantages compared to traditional heating system; however, to obtain best efficiency, it is essential to have an inductor giving homogeneous temperature on the pan bottom. For this aim, we propose a structure of inductor with four throats containing coils and optimize their distribution. In this paper, first we model magneto-thermal phenomenon of the system by a finite element method （FEM） for the mean to determine the distribution of temperature on the pan bottom by taking the nonlinearity of system. This study shows that a temperature distribution is not homogeneous. Second, with the aim to have homogeneous temperature distribution on the pan bottom, the optimal determination of throats distribution and their dimensions is obtained by genetic algorithms （GAs）. The optimized structure permits to satisfy our aim.

关键词： finite element method magneto-thermaldevices genetic algorithms

PV Solar Yield Applicable Simulator Based on Free Irradiance Data Source:Applied Comprehensive Tool for Solar Engineers

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Energy Engineering 2023年第4期120卷 885-909页

作者： Ahmed Mohamed Ragab abdelhalim Abdelnaby Zekry Ashraf Yahia Hassan Faculty of Engineering Communication SectionBenha UniversityBenha13511Egypt Faculty of Engineering Communication SectionAin Shams UniversityCairo11566Egypt

Accurate PV system simulators are implemented with expensive software platforms using paid irradiance *** main purpose of this paper is to develop and validate a PV system simulator,beginning with a solar cell parameter extraction model,then test and validate long-termIrradiance data using free online source(Typical Meteorological Year TMY in(PVGIS)European website),and finally building full solar generator simulator to run in working real *** results with Accurate Paid PV simulators(which use theMuneer model)showed good accuracy of the proposed *** flow starts with the Irradiance model’s data processing,then solar cell 5 parameters model data processing(to extract cell parameters),and finally full system *** coding programs in real working conditions are used for *** of solar cell parameter extraction show 99.6%to 99.99%matching with data sheet and cell performance under standard test *** simulation output shows 8%less yearly generated energy compared to the PVGIS 2022 long-term simulation(hourly basis(one-year time)).This is due to incident energy variations(between the years 2016 and 2022)of 4.02%.The novelty of the algorithm is the methodology,as it tests irradiance data on an hourly basis and validates results for a whole continuous ***,the 5-parameter solar cell model is used to be validated in long term analysis,not only STC conditions and could be applied on any PV solar *** algorithm and block diagramused are scalable,modular,and interchangeable with similarmodels to be *** simulator could test severalmethods andmodels in solar pv technology.

关键词： Photovoltaics solar systems solar cell parameters extraction solar simulationmodel irradiancemodels solar yield long term analysis