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Effect of Lead-Rubber Bearing Isolators in Reducing Seismic Damage for a High-Rise Building in Comparison with Normal Shear Wall System

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Structural Durability & Health Monitoring 2021年第3期15卷 247-260页

作者： Mahmoud Fakih Jaafar Hallal Hassan Darwich hala Damerji Faculty of Engineering Lebanese UniversityBeirutLebanon Laboratory of Composite Materials for Construction(LMC2) University of LyonLyonFrance Faculty of Engineering ArtsSciences and Technology University in LebanonBeirutLebanon

Seismic earthquakes are a real danger for the construction evolution of high rise *** rate of earthquakes around the world is noteworthy in a wide range of construction *** this study,we present the dynamic behavior of a high-rise RC building with dynamic isolators(lead-rubber-bearing),in comparison with a traditional shear wall system of the same *** isolation has been introduced in building construction to increase the structural stability and to protect the non-structural components against the damaging effects of an *** order to clarify the influence of incorporating lead rubber bearing isolators in the seismic response and in reducing seismic damages;a comparative study is performed between a fixed base system(shear wall system)and an isolated base system(Lead Rubber Bearing)on an irregular high rise reinforced concrete(RC)building located in Beirut consisting of 48 storeys almost asymmetric *** this purpose,a non-linear analysis of a real earthquake acceleration record(EI Centro seismic signal)is conducted,so that the mode shapes,the damping ratio and the natural frequencies of the two models are obtained using ETABS *** results prove a substantial elongation of the building period,as well as a reduction in the building displacement,the roof acceleration,the inter-storey drift ratio and the base shear force of isolated building relative to fixed-base *** study proves that this technology is applicable to high rise buildings with acceptable results.

关键词： Seismic damage non-linear time history analysis high-rise RC building seismic response analysis lead rubber bearing

Exploitation of Gene Expression and Cancer Biomarkers in Paving the Path to Era of Personalized Medicine

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Genomics, Proteomics & Bioinformatics 2017年第4期15卷 220-235页

作者： hala Fawzy Mohamed Kamel Hiba Saeed A.Bagader Al-Amodi Biochemistry Department Faculty of Medicine Umm AL-Qura University Medical Biochemistry Department Faculty of Medicine Ain Shams University

Cancer therapy agents have been used extensively as cytotoxic drugs against tissue or organ of a specific type of cancer. With the better understanding of molecular mcchanislns undcrlying carcinogenesis and cellular events during cancer progression and metastasis, it is now possible to use targeted therapy for these molecular events. Targeted therapy is able to identify cancer patients with dissimilar genetic defects at cellular level for the same cancer type and consequently requires individualized approach for treatment. Cancer therapy begins to shill steadily from the tra- ditional approach of ＂one regimen for all patients＂ to a more individualized approach, through which each patient will be treated specifically according to their specific genetic defects. Personalized medicine accordingly requires identification of indicators or markers that guide in the decision mak- ing of such therapy to the chosen patients for more effective therapy. Cancer biomarkcrs are fre- quently used in clinical practice for diagnosis and prognosis, as well as identification ol responsive patients and prediction of treatment response of cancer patient. The rapid breakthrough and development of microarray and sequencing technologies is probably the main tool for paving the way toward ＂individualized biomarker-driven cancer therapy＂ or ＂personalized medicine＂. In this review, we aim to provide an updated knowledge and overview of the currcnt landscape of cancer biomarkers and their role in personalized medicine, emphasizing the impact of gcnomics Oil the implementation of new potential targeted therapies and development of novel cancer biomarkers in improving the outcome of cancer therapy.

关键词： Personalized medicine Gene expression Targeted therapy Predictive biomarkers Prognostic biomarkers

Innovative design for a portable hybrid system of hydroponic and microalgae to produce food and biofuels

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Clean Energy 2022年第3期6卷 412-423页

作者： Ammar Alkhalidi hala Jarah Mohamad K.Khawaja German Jordanian University Energy Engineering DepartmentAmmanJordan University of Sharjah Sustainable and Renewable Energy DepartmentSharjahUAE

This study investigates an innovative hybrid system that combines hydroponics and microalgae in a compact portable shipping *** container is divided into two parts;one contains the microalgae system and the other contains the hydroponic *** combined system works by dividing the 24 hours into 12 hours of light and 12 hours of dark for each *** parts are connected using light-impermeable pipes that pass carbon dioxide from the dark side to the lit side and oxygen from the lit side to the dark *** this paper,the authors developed a validated mathematical model for hydroponic and microalgae to evaluate the system’s *** found by the model show the optimum parameters for the split photobioreactor and hydroponic *** first investigated parameter is the sparger diameter for split the photobioreactor and the second is the number of plants that give the better and optimum *** optimum modelling design for the combined hydroponic and microalgae system was using 100 plants for lettuce and three photobioreactors with a 0.009-m diameter for sparger to a photobioreactor system with an area of 15.6 m^(2).

关键词： hydroponic system microalgae system split photobioreactor nutrient film technique(nft) microalgae lipids biofuels

Passive RFID Tag for Railway Application

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Open Journal of Antennas and Propagation 2018年第2期6卷 15-24页

作者： Shreine Abd el-Rahman Ahmed Attiya Hossam el-Deen Mamoud hala Abd-el Kader electronics Research Institute Giza Egypt Shoubra Faculty of Engineering Benha University Cairo Egypt

Passive RFID tags based on narrow band absorbers are proposed for railway applications. The tags consist of absorbing tiles of size 30 × 30 cm2. The de-signs of these narrow band absorbers are presented based on infinite array approximation by using periodic boundary conditions. Then, the radar cross sections (RCS) of finite tiles of these designed absorbers are compared with the corresponding RCS of a conduction plate of the same size of the tiles. The difference between the RCS of the absorbing tiles and the conducting tiles corresponds to the RFID digit “1” or “0”. An experiential verification for a sample of these narrow band absorbers is presented based on measuring a fi-nite tile inside a transverse electromagnetic (TEM) cell. The design of this TEM cell is also discussed in detail.

关键词： RFID Tag TEM Cell Absorbers Periodic Structures

Challenges of COVID-19 prevention and control: A narrative review

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Journal of Acute Disease 2022年第4期11卷 127-132页

作者： Abdel-Hady el-Gilany Eman Sameh hala SAbou-elWafa Public Health&Preventive Medicine Mansoura UniversityEgypt Public Health&Preventive Medicine Minia UniversityEgypt Industrial Medicine and Occupational Health Mansoura UniversityEgypt

This narrative review aims to highlight some of the factors contributing to challenges faced by many countries in controlling the spread of COVID-19 pandemic that continues to rage around the world,especially after stoppage of official prevention and control activities.A literature search was conducted on PubMed,and Google using search terms“COVID-19”,“challenges”,“prevention”,and“control”in different ***-19 prevention and control challenges are related to health-system,vaccines,administration,and society *** the spread of COVID-19 necessitates cooperation between community leaders,healthcare professionals,religious leaders,and the public.

关键词： COVID19 Challenges Prevention Control Vaccine Health system Administration Social Culture

Photoswitchable molecular dipole antennas with tailored coherent coupling in glassy composite

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Light(Science & Applications) 2015年第1期4卷 259-266页

作者： Mady elbahri Ahnaf Usman Zillohu Bastian Gothe Mehdi Keshavarz Hedayati Ramzy Abdelaziz hala Jarallah el-Khozondar Muhammad Bawa’aneh Moheb Abdelaziz Andrei Lavrinenko Sergei Zhukovsky Shahin Homaeigohar Nanochemistry and Nanoengineering Faculty of EngineeringInstitute for Materials ScienceUniversity of KielKaiserstrasse 224143 KielGermany Nanochemistry and Nanoengineering Institute of Polymer ResearchHelmholtz-Zentrum GeesthachtMax-Planck-Strasse 121502 GeesthachtGermany Refractories Ceramics and Building Materials DepartmentNational Research CentreDokkiCairoEgypt electrical Engineering Department Islamic University of GazaGazaPO Box 108Palestine The Hashemite University Department of PhysicsZarqaJordan&Khalifa University of ScienceTechnology&Research(KUSTAR)PO Box 573SharjahUAE DTU Fotonik Technical University of DenmarkOersteds pl.343Kongens LyngbyDK-2800Denmark

Here,we introduce the first experimental proof of coherent oscillation and coupling of photoswitchable molecules embedded randomly in a polymeric matrix and acting cooperatively upon illumination with UV *** particular,we demonstrate the specular reflection and Brewster phenomenon alteration of photochromic molecular dipole *** successfully demonstrate the concept of Brewster wavelength,which is based on the dipolar interaction between radiating dipoles and the surrounding matrix possessing a net dipole moment,as a key tool for highly localized sensing of matrix *** also introduce the concept of‘tailored molecular photonic coupling’while highlighting the role of interferences for the design of optically active media by adjusting the photonic response of the medium with the real and imaginary refractive index of photoswitchable molecules in the‘ON’*** results enhance our fundamental understanding of coherent dipole radiation and open a new vein of research based on glassy disordered dipolar composites that act as macroscopic antenna with cooperative action;furthermore,these results have important implications for new design rules of tailored photonics.

关键词： Brewster angle coherent coupling collective oscillation photoswitchable molecular photonics specular reflection

Plus Energy Buildings:A Numerical Case Study

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Fluid Dynamics & Materials Processing 2023年第1期19卷 117-134页

作者： Abed Hawila hala Alsalloum Abdelatif Merabtine Farouk Fardoun Rachid Bennacer EPF School of Engineering Rosieres-Prés-TroyesFrance Faculty of Engineering Lebanese UniversityHadathLebanon Centre Scientifique et Technique du Batiment Health and Comfort DepartmentSaint-Martin-D’HèresFrance Doctoral School of Science and Technologies Lebanese UniversityHadathLebanon Faculty of Technology Department GIMLebanese UniversitySaidaLebanon LMPS Paris Saclay UniversityParisFrance

The feasibility of Plus Energy Building for a sample relevant case is *** a literature review aimed to identify key aspects of this type of buildings,a preliminary evaluation of the thermal performance of a building constructed using conventional material is presented together with a parametric analysis of the impact of typical influential *** domestic hot water(SDHW)and photovoltaic systems(PV)are considered in the *** simulations indicate that for the examined sample case(Beirut in Lebanon)the total annual energy need of conventional building is 87.1 kWh/y.m^(2).About 49%of energy savings can be achieved by improving the building envelope and installing energy efficient ***,about 90%of energy savings in domestic hot water production can be achieved by installing a SDHW system composed of two solar collectors connected in ***,the addition of a grid connected PV array system can significantly mitigate the energy needs of the building leading to an annual excess of energy.

关键词： Plus energy building building performance simulation parametric analysis energy-efficient design solar energy

Experimental Modal Damping Identification of a Mechanical Structure Using Video Magnification Technique

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Sound & Vibration 2021年第2期55卷 131-140页

作者： Jaafar Hallal Mahmoud Fakih hala Damerji Mohammad Hammoud Mehdi Chouman Mechanical Engineering Department Faculty of EngineeringLebanese UniversityBeirutLebanon Civil Engineering Department Faculty of EngineeringLebanese UniversityBeirutLebanon Universite Grenoble Alpes CNRSGrenoble INP3SRGrenobleFrance SDM Research Group Mechanical Engineering DepartmentInternational University of BeirutBeirutLebanon Mechanical Engineering Department Lebanese International UniversityBekaaLebanon

Vibration can be introduced in all mechanical fields in our *** try to avoid its negative effect leading in some cases to deformation in the *** researches are dedicated to study the identification of damping especially in multi degree of freedom systems with particular attention to the source of energy *** focus on developing new tools or methods which may be used in real problems to obtain accurate results about the amount(or value)and the location of energy dissipation in the *** aim of this paper is to present an original procedure aims to experimentally determine the modal damping ratio of a mechanical *** proposed procedure consists of extracting the Frequency Response Function of the vibrating system using the video magnification method and then calculate the modal damping ratio using the 3-dB *** experimental measurements are carried out by giving an external force on a cantilever beam,then the modal damping ratios are extracted using motion *** obtained results show a relative error less than 4.2% between the experimental measurements and the analytical calculation for the Frequency Response Function(FRF)*** novelty of the paper is to combine the video magnification technique and the 3dB method in a procedure that aims to experimentally measure the modal damping of a mechanical *** proposed procedure in this paper represents the damping identification as a simple and easy engineering application.

关键词： Vibrations modal damping experimental measurement video magnification

Optimization of Root Section for Ultra-long Steam Turbine Rotor Blade

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Journal of Thermal Science 2018年第2期27卷 95-102页

作者： Jindrich hala Martin Luxa David Simurda marek Bobcik Ondrej Novak Bartolomej Rudas Jaroslav Synac Institute of Thermomechanics of The Czech Academy of Sciences Prague Czech Republic Doosan Skoda Power Ltd Pilsen Czech Republic Faculty of Mechanical Engineering University of West Bohemia Pilsen Czech Republic

This study presents the comparison of aerodynamic performances of two successive designs of the root profiles for the ultra-long rotor blade equipped with a straight fir-tree dovetail. Since aerodynamic and strength requirements laid upon the root section design are contradictory, it is necessary to aerodynamically optimize the design within the limits given by the foremost strength requirements. The most limiting criterion of the static strength is the size of the blade cross-section, which is determined by the number of blades in a rotor and also by the shape and size of a blade dovetail. The aerodynamic design requires mainly the zero incidence angle at the inlet of a profile and in the ideal case ensures that the load does not exceed a limit load condition. Moreover, the typical root profile cascades are transonic with supersonic exit Math number, therefore, the shape of a suction side and a trailing edge has to respect transonic expansion of a working gas. In this paper, the two variants of root section profile cascades are compared and the aerodynamic qualities of both variants are verified using CFD simulation and two mutually independent experimental methods of measurements （optical and pneumatic）.

关键词： steam turbine blade cascade root section