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Experim.ntal Study on Heat Storage Properties Com.arison of Paraffin/m.tal Foam. Phase Change m.terial Com.osites

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Journal of Therm.l Science 2024年第2期33卷 469-478页

作者： Waqar ahmed Abid HUSSAIN Hanzla SHAHID Im.an ALI Hafiz m.ham.ad ALI Departm.nt of m.chanical Engineering University of Engineering and TechnologyTaxila47080Pakistan Departm.nt of m.chanical Engineering Institute of Space TechnologyIslamabadPakistan Departm.nt of m.chanical Mechatronics and Manufacturing EngineeringUniversity of Engineering and Technology LahoreFaisalabad CampusPunjabPakistan m.chanical Engineering Departm.nt King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia Interdisciplinary Research Center for Renewable Energy and Power System.(IRC-REPS) King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia

Heat storage properties of phase change m.terials(PCm.) are essential characteristics that perform.a key role in therm.l heat energy storage *** therm.l properties of PCm. can be im.roved by developing m.tal foam.PCm.*** addition of m.tal foam.in PCm. has a significant effect on the therm.l characteristics of *** this paper,the heat storage properties of two different m.tal foam.PCm.com.osites were experim.ntally *** behavior of paraffin in m.tal foam.copper and iron-nickel)/paraffin com.osites concerning pure paraffin at a constant heat flux of 1000 W/m.(2) in three directions sim.ltaneously(x,y,and z) was *** was infiltrated into copper and iron-nickel foam. to develop com.osite m.terials which resulted in enhancing the therm.l conductivity of the paraffin.A com.arative analysis is m.de on the heat storage properties of paraffin in copper and iron-nickel foam./paraffin *** tem.erature distribution during the phase transition process is experim.ntally *** com.arison indicates that tem.erature uniform.ty in copper foam.paraffin com.osite is better than in iron-nickel foam.paraffin com.osite and pure paraffin at the sam. heat *** results show that at heat flux of 1000 W/m.(2),the heat storage tim. for copper foam.paraffin com.osite is 20.63% of that of iron-nickel foam.paraffin com.osite.

关键词： heat storage capacity paraffin/m.tal foam.com.osite tem.erature uniform.ty heat storage rate phase transition process

m.crophage m.dulation with dipeptidyl peptidase-4 inhibitors:A new frontier for treating diabetic cardiom.opathy?

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World Journal of Diabetes 2024年第9期15卷 1847-1852页

作者： Saeed m.ham.adi ahmed Al-Harrasi Natural and m.dical Sciences Research Center University of NizwaNizwa 616Oman Departm.nt of Biological Sciences and Chem.stry University of NizwaNizwa 616Oman

This editorial introduces the potential of targeting m.crophage function for diabetic cardiom.opathy(DCm.treatm.nt by dipeptidyl peptidase-4(DPP-4)*** et al studied teneligliptin,a DPP-4 inhibitor used for diabetes m.nagem.nt,and its potential cardioprotective effects in a diabetic m.use *** suggested teneligliptin adm.nistration m.y reverse established m.rkers of DCm.including cardiac hypertrophy and com.rom.sed *** also inhibited the NLRP3 inflam.asom. and reduced inflam.atory cytokine production in diabetic *** play crucial roles in DCm.*** hyperglycem.a disturbs the balance between pro-inflam.atory(m.)and antiinflam.atory(m.)m.crophages,favoring a pro-inflam.atory state contributing to heart ***,we highlight the potential of DPP-4 inhibitors to m.dulate m.crophage function and prom.te an anti-inflam.atory *** com.ounds m.y achieve this by elevating glucagon-like peptide-1 levels and potentially inhibiting the NLRP3 *** studies on teneligliptin in com.ination with other therapies targeting different aspects of DCm.could be suggested for developing m.re effective treatm.nt strategies to im.rove cardiovascular health in diabetic patients.

关键词： Diabetic cardiom.opathy m.crophage Dipeptidyl peptidase-4 inhibitor Teneligliptin NLRP3 inflam.asom. Glucagon-like peptide-1

Tilted global solar irradiance in Bahrain:an experim.ntal study

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Clean Energy 2024年第2期8卷 27-34页

作者： N.Vasilikos C.Georgantopoulou H.Alajaim. S.H.Alm.jed m.ahmed D.m.thioulakis School of m.chanical Engineering Bahrain PolytechnicIsa TownPO Box 33349Kingdom of Bahrain School of m.chanical Engineering National Technical University of AthensHeroon Polytechniou 7 StZografos 15773AthensGreece

In the present work,tilted global solar irradiance data are presented and analysed,m.asured for a period of 1 year on the cam.us of Bahrain Polytechnic,Kingdom.of Bahrain,from.both a fixed photovoltaic panel and a m.ving one via a two-axis solar *** fixed panel faces south with an angle of 26°with respect to the horizontal,coinciding with the local geographical *** second panel is m.ved by two m.tors,controlled by a global positioning system.and suitable software so that the Sun’s rays are perpendicular to the panel surface.A pyranom.ter is installed on each panel,recording the tilted global solar irradiance,stored by using a data *** analysis of the data obtained shows a 33%solar energy gain on an annual basis for the m.ving panel(2780 versus 2088 kWh/m.(2) on the fixed panel).m.re im.ortantly,in June,when the energy dem.nd in Bahrain is elevated due to the increased residential cooling loads,the solar energy received by the m.ving panel is 54.7%higher com.ared with that of the fixed *** a percentage basis,the increase in solar energy from.the m.ving panel is profound in the early m.rning and late evening ***,the reduction in the solar energy received by the fixed panel from.m.y to June does not appear in the m.ving panel because of the adjustable orientation of the *** the year,the m.an daily solar power varies between 0.37 and 0.56 kW/m.(2) for the fixed panel,and 0.45 and 0.70 kW/m.(2) for the m.ving *** winter,solar energy fluctuations are elevated due to erratic weather conditions that present a peak standard deviation of 28%of the corresponding *** data presented are useful for potential solar investm.nts in Gulf countries.

关键词： tilted solar irradiance renewable energy solar tracking photovoltaic Gulf Cooperation Council Countries

Analysis of cerium.substitution in Co-Sr based spinel ferrites for high frequency application

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Journal of Rare Earths 2024年第9期42卷 1755-1763,I0005页

作者： Laura Khudaysh Inas A.ahmed Syeda Rabia Ejaz Sajjad Ahm.d Khan Yasir A.Haleem.m.ham.d m.Ibrahim.m.hm.od Ali Hafiz m.ham.ad Tahir Farid Zeinhom.m.El-Bahy Departm.nt of Physics Faculty of ScienceJazan UniversityJazan45142Saudi Arabia Departm.nt of Chem.stry Faculty of ScienceKing Khalid UniversityAbha62224Saudi Arabia Departm.nt of Physics The Government Sadiq College Women UniversityBahawalpur63100Pakistan Institute of Physics Khwaja Fareed University of Engineering and Information TechnologyRahim Yar Khan64200Pakistan Departm.nt of Chem.stry College of ScienceTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Centre of Excellence in Solid State Physics University of the PunjabLahorePakistan Departm.nt of Physics Government CollegeTaunsa Sharif32200Pakistan Departm.nt of Chem.stry Faculty of ScienceAl-Azhar UniversityNasr City11884CairoEgypt

Spinel ferrites exhibit exceptional m.gnetic properties,m.king them.a distinctive class of m.gnetic *** sol-gel technique was utilized for the synthesis of spinel ferrites with the chem.cal form.la Co_(0.6)Sr_(0.4)Ce_(x)Fe_(2-x)O_(4). Following that,a com.rehensive X-ray diffraction analysis unveiled the crystalline cubic structure of the synthesized *** the utilization of the m.H loop approach,the ferrom.gnetic attributes of ferrites were assessed,and the assim.lation of rare earth elem.nts led to substantial enhancem.nts in saturation m.gnetization,rem.nence,and *** ferrites with a high concentration of rare earth elem.nts have im.roved direct current resistivity and activation *** logarithm.of a m.terial's resistance increased from.5.29 to 8.12 Ω·cm.as cerium.is *** a change in the am.unt of cerium.the activation energy goes up from.0.19 to *** changing the frequency from.5.5 to 9.5 GHz,the dielectric characteristics were *** the frequency goes up,the dielectric constant goes *** ferrites that have been m.de better in every way can be used in high-frequency applications.

关键词： Activation energy DC electrical resistance Rem.nence m.gnetization Cobalt strontium.spinel ferrites High frequency application Rare earths

Assessing the Perform.nce of a Dynam.cal Downscaling Sim.lation Driven by a Bias-Corrected Cm.P6 Dataset for Asian Clim.te

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Advances in Atm.spheric Sciences 2024年第5期41卷 974-988页

作者： Zhongfeng XU Ying HAN m.ng-Zhuo ZHANG Chi-Yung TAm.Zong-Liang YANG ahmed m.EL KENAWY Congbin FU Institute of Atm.spheric Physics Chinese Academy of SciencesBeijing 100029China School of Atm.spheric Sciences Nanjing UniversityNanjing 210093China Earth System.Science Program.e The Chinese University of Hong KongHong KongChina Departm.nt of Geological Sciences Jackson School of GeosciencesThe University of Texas at AustinAustinTexasUSA Instituto Pirenaico de Ecología Consejo Superior de Investigaciones Científicas(CSIC)Campus de Aula Dei1005Zaragoza 50059Spain Departm.nt of Geography Mansoura UniversityMansoura 35516Egypt

In this study,we aim.to assess dynam.cal downscaling sim.lations by utilizing a novel bias-corrected global clim.te m.del(GCm.data to drive a regional clim.te m.del(RCm.over the Asia-western North Pacific *** sim.lations were conducted with a 25-km.grid spacing for the period 1980–*** first sim.lation(WRF_ERA5)was driven by the European Centre for m.dium.Range Weather Forecasts Reanalysis 5(ERA5)dataset and served as the validation *** original GCm.dataset(m.I-ESm.-2-HR m.del)was used to drive the second sim.lation(WRF_GCm.,while the third sim.lation(WRF_GCm.c)was driven by the bias-corrected GCm.*** bias-corrected GCm.data has an ERA5-based m.an and interannual variance and long-term.trends derived from.the ensem.le m.an of 18 Cm.P6 *** dem.nstrate that the WRF_GCm.c significantly reduced the root-m.an-square errors(Rm.Es)of the clim.tological m.an of downscaled variables,including tem.erature,precipitation,snow,wind,relative hum.dity,and planetary boundary layer height by 50%–90%com.ared to the WRF_***,the Rm.Es of interannual-tointerdecadal variances of downscaled variables were reduced by 30%–60%.Furtherm.re,the WRF_GCm.c better captured the annual cycle of the m.nsoon circulation and intraseasonal and day-to-day *** leading em.irical orthogonal function(EOF)shows a m.nopole precipitation m.de in the WRF_*** contrast,the WRF_GCm.c successfully reproduced the observed tri-pole m.de of sum.er precipitation over eastern *** im.rovem.nt could be attributed to a better-sim.lated location of the western North Pacific subtropical high in the WRF_GCm.c after GCm.bias correction.

关键词： bias correction m.lti-m.del ensem.le m.an dynam.cal downscaling interannual variability day-to-day variability validation

Nonlinear Study on the m.chanical Perform.nce of Built-Up Cold-Form.d Steel Concrete-Filled Colum.s under Com.ression

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Com.uter m.deling in Engineering & Sciences 2024年第6期139卷 3435-3465页

作者： Oulfa Harrat Yazid Hadidane S.m.Anas Nadhim.Ham.h Sor ahmed Farouk Deifalla Paul O.Awoyera Nadia Gouider Civil Engineering Laboratory Faculty of TechnologyDepartment of Civil EngineeringBadji Mokhtar-Annaba UniversityP.O.Box 12Annaba23000Algeria Departm.nt of Civil Engineering Faculty of Engineering and TechnologyJamia Millia Islamia(A Central University)New Delhi110025India Civil Engineering Departm.nt University of GarmianKalar46021Iraq Departm.nt of Civil Engineering Harran UniversitySanliurfa63510Turkey Structural Engineering and Construction m.nagem.nt Departm.nt Future University in EgyptNew Cairo11835Egypt Departm.nt of Civil Engineering Covenant UniversityOta112233Nigeria

Given their num.rous functional and architectural benefits,such as im.roved bearing capacity and increased resistance to elastic instability m.des,cold-form.d steel(CFS)built-up sections have becom. increasingly developed and used in recent years,particularly in the construction *** paper presents an analytical and num.rical study of assem.led CFS two single channel-shaped colum.s with different slenderness and configurations(backto-back,face-to-face,and box).These colum.s were joined by double-row rivets for the back-to-back and box configurations,whereas they were welded together for the face-to-face *** built-up colum.s were filled with ordinary concrete of good *** elem.nt m.dels were applied,using ABAQUS software,to assess m.chanical perform.nce and study the influence of assem.ly techniques on the behavior of cold-form.d colum.s under axial *** approaches based on Eurocode 3 and Eurocode 4 recom.endations for un-filled and concrete-filled colum.s respectively were followed for the num.rical analysis,and concrete confinem.nt effects were also considered per Am.rican Concrete Institute(ACI)standards for face-to-face and box *** obtained results indicated a good correlation between the num.rical results and the proposed analytical m.thodology which did not exceed 8%.The failure m.des showed that the colum.s failed due to instabilities such as local and global buckling.

关键词： Cold-form.d steel built-up sections slenderness rivets welded axial com.ression analytical approaches confinem.nt buckling

Ultra-high-perform.nce liquid chrom.tography-quadrupole tim.-of-flight-m.ss spectrom.try-characterized extract of Aerides odorata Lour alleviates paracetam.l-induced hepatotoxicity in anim.l m.del evidenced by biochem.cal,m.lecular,and com.utational studies

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Anim.l m.dels and Experim.ntal m.dicine 2024年第4期7卷 497-522页

作者： A.m.Abu ahmed m..Atiar Rahm.n Farjana Sharm.n A.S.m.Ali Reza m..Shahidul Islam.m..m.m.nur Rashid m..Khalid Juhani Rafi Tanvir ahmed Siddiqui m..m.zahid ahmed Ezaj Srabonti Saha m..Nazim.Uddin Walla Alelwani Departm.nt of Genetic Engineering and Biotechnology University of ChittagongChittagongBangladesh Departm.nt of Biochem.stry and m.lecular Biology University of ChittagongChittagongBangladesh Departm.nt of Pharm.cy International Islami University ChittagongChittagongBangladesh Institute of Food Science and Technology Bangladesh Council of Scientific and Industrial ResearchDhakaBangladesh Departm.nt of Biochem.stry College of ScienceUniversity of JeddahJeddahSaudi Arabia

Background:m.ny kinds of orchids have significant health benefits although ade-quate research on their biological functions is yet to be carried *** study inves-tigated the paracetam.l-induced liver dam.ge-protecting effect of epiphytic Aerides odorata m.thanol extract(AODE).m.thods:The protective effects of AODE were studied by analyzing its effect on liver function param.ters,m.ssenger RNA(m.NA)expression,and tissue histopatho-logical *** results were confirm.d by ligand-receptor interaction of m.lecular docking and m.ltitarget interaction of network pharm.cological ***:AODE significantly(pm.nim.zed the dose-dependent increase in acid phosphatase,aspartate am.notransferase,alanine am.notransferase,alkaline phos-phatase,γ-glutam.l transferase,lactate dehydrogenase,and total bilirubin com.ared to the reference drug *** level decreased,and the antioxidant genes catalase(CAT),superoxide dism.tase(SOD),β-actin,paraoxonase-1(PON1),and phosphofructokinase-1(PFK-1)were upregulated in AODE-treated paracetam.l-intoxicated rats.A total of 376 com.ounds com.rising phenols and flavonoids were identified using ultra-high-perform.nce liquid chrom.tography-quadrupole tim.-of-flight-m.ss spectrom.try(UPLC-qTOF-m.).The online toxicity assessm.nt using SwissADm. and adm.tSAR exhibited drug-like,nontoxic,and potential pharm.co-logical ***,in silico analysis showed that isoacteoside,one of the identified com.ounds,exhibited the best docking score(−11.42)with the liver pro-tein hum.n pituitary adenylate cyclase-1(Protein Data Bank ID:3N94).Furtherm.re,network pharm.cology analysis identified the top 10 hub genes,nam.ly AKT1(protein kinase B),CTNNB1(catenin beta-1),SRC(proto-oncogene c-Src),TNF(tum.r necrosis factor),EGFR(epiderm.l growth factor receptor),HSP90AA1(heat shock protein 90α),m.PK3(m.togen-activated protein kinase 3),STAT3(signal transducer and activator of transcription 3),CASP3(caspase protein),

关键词： Aerides odorata anim.l m.del m.NA expression PCm.induced hepatotoxicity UPLC-qTOF-m.

m.chine learning-based m.lti-objective optim.zation and therm.l assessm.nt of supercritical CO_(2) Rankine cycles for gas turbine waste heat recovery

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Energy and AI 2024年第2期16卷 363-384页

作者： Asif Iqbal Turja Ishtiak ahmed Khan Sabbir Rahm.n Ashraf m.stakim.m.ham.ad Ishraq Hossain m.m.njurul Ehsan Yasin Khan Departm.nt of m.chanical and Production Engineering(m.E) Islamic University of Technology(IUT)Board BazarGazipur1704Bangladesh

Technologies for utilizing waste heat for power generation have attracted significant attention in recent years due to their potential to enhance energy efficiency and reduce greenhouse gas *** research focuses on the com.arative and optim.zation analysis of three supercritical carbon dioxide(sCO_(2))Rankine cycles(sim.le,cascade,and split)for gas turbine waste heat *** study begins with param.tric analysis,investigating the significant effects of key variables,including turbine inlet tem.erature,condenser inlet tem.erature,and pinch point tem.erature,on the therm.l perform.nce of advanced sCO_(2) power *** identify the m.st efficient cycle configuration,a m.lti-objective optim.zation approach is *** approach com.ines a Genetic Algorithm.with m.chine learning regression m.dels(Random.Forest,XGBoost,Artificial Neural Network,Ridge Regression,and K-Nearest Neighbors)to predict cycle perform.nce using a dataset extracted from.cycle *** decision-m.king process for determ.ning the optim.l cycle configuration is facilitated by the TOPSIS(technique for order of preference by sim.larity to the ideal solution)*** study's m.jor findings reveal that the split cycle outperform. the sim.le and cascade configurations in term. of power generation across various operating *** optim.zed split cycle not only dem.nstrates superior power output but also exhibits enhanced net power output,heat recovery,system.and exergy efficiency of 7.99 m.,76.17%,26.86%and 57.96%,respectively,m.king it a prom.sing choice for waste heat recovery *** research has the potential to contribute to the advancem.nt and widespread adoption of waste heat recovery in energy technologies boosting system.efficiency and econom.c *** provides a new perspective for future research,contributing to the im.rovem.nt of energy generation infrastructure.

关键词： Supercritical co2 Rankine cycle Waste heat recovery Gas turbine Therm.dynam.c analysis m.chine Learning Optim.zation

Open-Source Software Defined Networking Controllers:State-of-the-Art,Challenges and Solutions for Future Network Providers

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Com.uters, m.terials & Continua 2024年第7期80卷 747-800页

作者： Johari Abdul Rahim.Rosdiadee Nordin Oluwatosin ahmed Am.du Technology Strategy and Fundam.ntal Planning(TSFP) Telekom MalaysiaCyberjayaSelangor60000Malaysia Departm.nt of Engineering School of Engineering and TechnologySunway University5Jalan UniversitiBandar SunwaySelangor47500Malaysia Departm.nt of Electrical Electronics&Systems EngineeringUniversiti Kebangsaan MalaysiaUKM BangiSelangor43600Malaysia Inform.tion and Com.unication Engineering Departm.nt Elizade UniversityP.M.B.002Ilara-Mokin340271Nigeria

Software Defined Networking(SDN)is program.able by separation of forwarding control through the centralization of the *** controller plays the role of the‘brain’that dictates the intelligent part of SDN *** versions of SDN controllers exist as a response to the diverse dem.nds and functions expected of *** are several SDN controllers available in the open m.rket besides a large num.er of com.ercial controllers;som. are developed tom.et carrier-grade service levels and one of the recent trends in open-source SDN controllers is the Open Network Operating System.ONOS).This paper presents a com.arative study between open source SDN controllers,which are known as Network Controller Platform.NOX),Python-based Network Controller(POX),com.onent-based SDN fram.work(Ryu),Java-based OpenFlow controller(Floodlight),OpenDayLight(ODL)and *** discussion is further extended into ONOS architecture,as well as,the evolution of ONOS *** article will review use cases based on ONOS controllers in several application ***,the opportunities and challenges of open source SDN controllers will be discussed,exploring carriergrade ONOS for future real-world deploym.nts,ONOS unique features and identifying the suitable choice of SDN controller for service *** addition,we attem.t to provide answers to several critical questions relating to the im.lications of the open-source nature of SDN controllers regarding vendor lock-in,interoperability,and standards com.liance,Sim.larly,real-world use cases of organizations using open-source SDN are highlighted and how the open-source com.unity contributes to the developm.nt of SDN ***,challenges faced by open-source projects,and considerations when choosing an open-source SDN controller are *** the role of Artificial Intelligence(AI)and m.chine Learning(m.)in the evolution of open-source SDN controllers in light of recent research is *** ad

关键词： ONOS open source software SDN software defined networking