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A Novel Layered Double Hydroxide and Dodecyl Alcohol Assisted PCM Composite with High Latent Heat Storage Capacity and Thermal Conductivity

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Journal of Thermal Science 2024年第2期33卷 537-547页

作者： AL-AHMED amir SARI Ahmet KHAN Firoz AL-RASHEIDI masoud Hekimoğlu Gökhan AFZAAL Mohammad A.ALSULAMI Ahmed DAFALLA Hatim SALHI Billel A.ALSULAIMAN Fahad Interdisciplinary Research Center for Renewable Energy and Power Systems(IRC-REPS) King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Department of Metallurgical and Material Engineering Karadeniz Technical UniversityTrabzon61080Turkey Maths and Natural Sciences Division Higher Colleges of TechnologyP.O.Box 7947SharjahUnited Arab Emirates Department of Mechanical Engineering King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Core Research Facilities King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Interdisciplinary Research Center for Membranes and Water Security King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia

Dodecyl alcohol(DDA) is a promising solid-liquid phase change material(PCM) due to its favorable latent heat storage(LHS) ***,the leakage issue of PCM in a melted state during the heating period and low thermal conductivity restricts its utilization potential in thermal energy storage(TES) *** the same context,the present work aims to overcome the leakage issue and improve the thermal conductivity of the *** this in mind,a novel leak-proof layered double hydroxide(LDH)/DDA composite PCM is proposed through a solution-based impregnation *** leak-proof impregnation ratio of the DDA impregnated within the cavities of the synthesized Al/Fe-LDH was determined to be 60%.Detailed morphological,physicochemical,and thermal properties of the fabricated composite were studied by scanning electron microscopy(SEM),Fourier transforms infrared(FTIR) spectroscopy,X-ray diffraction(XRD)spectroscopy,differential scanning calorimetry(DSC),thermalgravimetric analysis(TGA),and thermal cycling *** results show that the LDH/DDA composite has a suitable phase change temperature(about 20℃) for passive solar thermal management of building *** composite PCM showed high LHS enthalpy(about136 J/g),good thermal stability,and cycling LHS *** also showed nearly 152% higher thermal conductivity compared to that of pure DDA,ultimately reducing the melting and solidification time of the pure DDA by 44.9% and 45.5%,respectively.

关键词： dodecyl alcohol layered double hydroxide composite PCM thermal conductivity thermal energy storage(TES)

6G-Enabled Internet of Things:Vision,Techniques,and Open Issues

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Computer Modeling in Engineering & Sciences 2022年第12期133卷 509-556页

作者： Mehdi Hosseinzadeh Atefeh Hemmati amir masoud Rahmani Pattern Recognition and Machine Learning Lab Gachon UniversitySeongnam13120Korea Department of Computer Engineering Science and Research BranchIslamic Azad UniversityTehran***Iran Future Technology Research Center National Yunlin University of Science and TechnologyYunlin64002Taiwan

There are changes in the development of wireless technology systems every decade.6G(sixth generation)wireless networks improve on previous generations by increasing dependability,accelerating networks,increasing available bandwidth,decreasing latency,and increasing data transmission speed to standardize communication *** purpose of this article is to comprehend the current directions in 6G studies and their relationship to the Internet of Things(IoT).Also,this paper discusses the impacts of 6G on IoT,critical requirements and trends for 6G-enabled IoT,new service classes of 6G and IoT technologies,and current 6G-enabled IoT studies selected by the systematic literature review(SLR)method published from 2018 to *** addition,we present a technical taxonomy for the classification of 6G-enabled IoT,which includes self-organization systems,energy efficiency,channel assessment,and ***,according to the articles reviewed,we consider the evaluation factors in this domain,including data transmission,delay,energy consumption,and ***,we focus on open issues and future research challenges in 6G-enabled *** mention important future challenges and directions,we can point to migration,data storage,data resource,data security,data sharing,data offloading,availability,scalability,portability,user experience,reliability,authentication,and authorization.

关键词： Internet of Things 6G wireless network machine learning artificial intelligence

Exploring the mechanical properties of steel-and polypropylene-reinforced ultra-high-performance concrete through numerical analyses and experimental multi-target digital image correlation

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Frontiers of Structural and Civil Engineering 2023年第8期17卷 1228-1248页

作者： Behrooz DADMAND Hamed SADAGHIAN Sahand KHALILZADEHTABRIZI masoud POURBABA amir MIRMIRAN Department of Civil Engineering University of RaziKermanshah ***Iran Department of Civil Engineering University of TabrizTabriz ***Iran Ingram School of Engineering Texas State UniversitySan MarcosTX 78666USA University of Texas at Tyler TylerTX 75799USA

This study presents experimental and numerical investigations on the mechanical properties of ultrahigh-performance concrete(UHPC)reinforced with single and hybrid micro-and macro-steel and polypropylene *** this purpose,a series of cubic,cylindrical,dog-bone,and prismatic beam specimens(total fiber by volume=1%,and 2%)were tested under compressive,tensile,and flexural loadings.A method,namely multi-target digital image correlation(MT-DIC)was used to monitor the displacement and deflection *** obtained experimental data were subsequently used to discuss influential parameters,i.e.,flexural strength,tensile strength,size effect,*** analyses were also carried out using finite element software to account for the sensitivity of different ***,nonlinear regression analyses were conducted to obtain the flexural load-deflection *** results showed that the MT-DIC method was capable of estimating the tensile and flexural responses as well as the location of the crack with high *** addition,the regression analyses showed excellent consistency with the experimental results,with correlation coefficients close to ***,size-effect modeling revealed that modified Bazant theory yielded the best estimation of the size-effect phenomenon compared to other models.

关键词： UHPC MT-DIC flexural behavior tensile behavior steel fiber polypropylene fiber

Experimental investigation of the impact of sugarcane molasses on the properties of colloidal gas aphron(CGA)drilling fluid

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Petroleum 2023年第2期9卷 199-204页

作者： amir Hossein Saeedi Dehaghani Seyed masoud Ghalamizade Elyaderani Department of Petroleum Engineering Faculty of Chemical EngineeringTarbiat Modares UniversityTehranIran

Colloidal gas aphron(CGA)based fluid has become very popular in drilling in the last two decades,as it reduces formation damages *** this study,sugarcane molasses(Mls)was used for the first time as a polymer in CGA-based to investigate its ability to improve the role of aphronized fluid as a drilling *** results showed that increasing the concentration of Mls to 12%(v/v)in CGA-based fluid reduces the drainage rate and increases half-life to 10.6 min,resulting in enhanced stability of the aphronized ***,because of increasing Mls concentration from 1%to 12%(v/v),the yield and the initial gas hold-up decrease to 74%and 299.4 mL,respectively,indicating that the presence of Mls allows less air into the aphron *** the rheological properties were improved in this study,the gel strength did not change ***,the results showed that by increasing the concentration of Mls,the average size of the bubbles decreases,and the particle-size distribution becomes more ***,the API filtration test revealed that the higher the Mls concentration in the aphronized fluid,the lower the fluid loss,and at the Mls concentration of 12%(v/v),the fluid loss was estimated at 19.54 mL.A natural polysaccharide with high molecular weight,Mls can be used as a polymer in CGAbased fluid and,thus,improve its performance.

关键词： Colloidal gas aphron Sugarcane molasses Drainage rate Rheology Filtration loss

Effect of 2-mercaptobenzothiazole concentration on sour-corrosion behavior of API X60 pipeline steel:Electrochemical parameters and adsorption mechanism

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International Journal of Minerals,Metallurgy and Materials 2022年第2期29卷 271-282页

作者： masoud Sabzi amir Hayati Jozani Farzad Zeidvandi Majid Sadeghi Saeid Mersagh Dezfuli Young Researchers and Elite Club Dezful BranchIslamic Azad UniversityDezfulIran Department of Materials Science and Engineering Science and Research BranchIslamic Azad UniversityTehranIran Center of Excellence for Surface Engineering and Corrosion Protection of Industrial School of Metallurgy and Materials EngineeringCollege of EngineeringUniversity of TehranP.O.Box 11155-4563TehranIran

We investigated the effect of the 2-mercaptobenzothiazole concentration on the sour-corrosion behavior of API X60 pipeline steel in an environment containing H_(2)S at 25°C and in the presence of 0,2.5,5.0,7.5,and 10.0 g/L of 2-mercaptobenzothiazole *** examine this behavior,we conducted open-circuit potential(OCP),potentiodynamic polarization,and electrochemical impedance spectroscopy(EIS)*** dispersive spectroscopy and scanning electron microscopy were also used to analyze the corrosion *** results of the OCP and potentiodynamic polarization tests revealed that 2-mercaptobenzothiazole reduces the speed of both the anodic and cathodic *** assessment of the Gibbs free energy of the inhibitor(△G_(ads)^(■))indicated that its value was less than-20 kJ·mol^(-1)and greater than-40 k J·mol^(-1).Therefore,the adsorption of 2-mercaptobenzothiazole onto the surface of the API X60 pipeline steel occurs both physically and chemically,the latter of which is particularly *** addition,as the△G_(ads)^(■)dsvalue was negative,we could conclude that the adsorption of 2-mercaptobenzothiazole onto the surface of the pipeline steel occurs *** EIS results indicate that with the increase in the 2-mercaptobenzothiazole inhibitor concentration,the corrosion resistance of API X60 steel *** analysis of the corrosion products revealed that iron sulfide compounds form on the *** summary,the results showed that an increase in the inhibitor concentration results in a decrease in the corrosion rate and an increase in inhibitory ***,we found that the 2-mercaptobenzothiazole adsorption process on the API X60 steel surfaces in an H2 S-containing environment follows the Langmuir adsorption isotherm and occurs spontaneously.

关键词： API X60 steel sour corrosion 2-mercaptobenzothiazole inhibitor concentration electrochemical parameters environments containing hydrogen sulfide

Efficacy of Curcumin on Cognitive Function Scores in Women with Premenstrual Syndrome and Dysmenorrhea: A Triple-Blind, Placebo-Controlled Clinical Trial

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Chinese Journal of Integrative Medicine 2023年第5期29卷 387-393页

作者： Afsane Bahrami amir masoud Jafari-Nozad Samira Karbasi Malaksima Ayadilord Gordon A.Ferns Clinical Research Development Unit of Akbar Hospital Mashhad University of Medical SciencesMashhadIran Student Research Committee Birjand University of Medical SciencesBirjandIran Cardiovascular Diseases Research Center Birjand University of Medical SciencesBirjandIran Brighton&Sussex Medical School Division of Medical EducationFalmerBrightonSussex BN19PHUK

Objective: To assess the efficacy of a curcumin supplementation on cognitive abilities in women suffering from premenstrual syndrome(PMS) and dysmenorrhea. Methods: A randomized, triple-blind, placebocontrolled trial was conducted from December 2019 to March 2020. A total of 124 women who had both PMS and dysmenorrhea were enrolled, and were equally and randomly assigned to the curcumin group or placebo group, 62 cases in each. Each subject received either a capsule containing 500 mg of curcuminoid, or a placebo daily, for 10 days(7 days before and until 3 days after the onset of menstrual bleeding) over 3 menstrual cycles. The cognitive abilities questionnaire was used to measures cognitive functions in 7 specific areas. Adverse reactions were monitored during and after the trial in both groups. Results: Administration of curcumin was associated with a significant increase in memory score(P=0.002), inhibitory control and selective attention(P=0.020), and total cognitive ability task(P=0.024). In addition, significant increments were found in scores of memory(3.5±3.1 vs. 0.4±3.8 in the curcumin and placebo groups, respectively;P=0.035), inhibitory control and selective attention(3.0±3.7 vs. 0.4±3.7;P=0.027) and total cognitive abilities(8.3±12.3 vs. 2.2±12.4;P=0.025) in the curcumin group versus placebo groups. Curcumin was safe and well-tolerable in current clinical trial. Conclusion: Curcumin has a beneficial efficacy on cognitive function scores in women with PMS and dysmenorrhea, with improvements in memory, inhibitory control and selective attention.(Registration No. IRCT20191112045424N1, available at: https://***)

关键词： curcumin memory cognition dysmenorrheal premenstrual syndrome triple-blind placebo-controlled clinical trial

Global prevalence of drug-resistant tuberculosis: a systematic review and meta-analysis

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Infectious Diseases of Poverty 2023年第3期12卷 1-12页

作者： Nader Salari amir Hossein Kanjoori Amin Hosseinian-Far Razie Hasheminezhad Kamran Mansouri masoud Mohammadi Department of Biostatistics School of HealthKermanshah University of Medical SciencesKermanshahIran Sleep Disorders Research Center Kermanshah University of Medical SciencesKermanshahIran Student Research Committee Kermanshah University of Medical SciencesKermanshahIran Department of Business Systems&Operations University of NorthamptonNorthamptonUK Medical Biology Research Center Kermanshah University of Medical SciencesKermanshahIran Cellular and Molecular Research Center Gerash University of Medical SciencesGerashIran

Background Tuberculosis is a bacterial infectious disease,which affects different parts of a human body,mainly lungs and can lead to the patient’s *** aim of this study is to investigate the global prevalence of drug-resistant tuberculosis using a systematic review and *** In this study,the PubMed,Scopus,Web of Science,Embase,ScienceDirect and Google Scholar repositories were systematically searched to find studies reporting the global prevalence of drug-resistant *** search did not entail a lower time limit,and articles published up until August 2022 were *** effects model was used to perform the *** heterogeneity of the studies was examined with the I^(2) *** analysis was conducted within the Comprehensive Meta-Analysis *** In the review of 148 studies with a sample size of 318,430 people,the I^(2) index showed high heterogeneity(I^(2)=99.6),and accordingly random effects method was used to analyze the *** bias was also examined using the Begg and Mazumdar correlation test which indicated the existence of publication bias in the studies(P=0.008).According to our meta-analysis,the global pooled prevalence of multi-drug resistant TB is 11.6%(95%CI:9.1–14.5%).Conclusions The global prevalence of drug-resistant tuberculosis was found to be very high,thus health authorities should consider ways to control and manage the disease to prevent a wider spread of tuberculosis and potentially subsequent deaths.

关键词： Prevalence Drug-resistant tuberculosis Burden Outbreak TB

Highly insulating thermoplastic blends comprising a styrenic copolymer for direct‐current power cable insulation

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High Voltage 2022年第2期7卷 251-259页

作者： Yingwei Ouyang amir masoud Pourrahimi IdaÖstergren Marcus Mellqvist JakobÅnevall Azadeh Soroudi Anja Lund Xiangdong Xu Thomas Gkourmpis Per‐Ola Hagstrand Christian Müller Department of Chemistry and Chemical Engineering Chalmers University of TechnologyGöteborgSweden Department of Electrical Engineering Chalmers University of TechnologyGöteborgSweden Innovation&Technology Borealis ABStenungsundSweden

The impact of the composition of blends comprising low‐density polyethylene(LDPE),isotactic polypropylene(PP)and a styrenic copolymer additive on the thermomechanical properties as well as the direct‐current(DC)electrical and thermal conductivity is *** presence of 5 weight percent(wt%)of the styrenic copolymer strongly reduces the amount of PP that is needed to enhance the storage modulus above the melting temperature of LDPE from 40 to 24 wt%.At the same time,the copolymer improves the consistency of the thermomechanical properties of the resulting ternary *** both the DC electrical and thermal conductivity strongly decrease with PP content,the addition of the styrenic copolymer appears to have little influence on either ***,PP in combination with small amounts of a styrenic copolymer not only allows to reinforce LDPE at elevated temperatures but also functions as an electrical conductivity‐reducing additive,which makes such thermoplastic ternary formulations possible candidates for the insulation of high‐voltage power cables.

关键词： property. blends copolymer

Application of ion-engineered Persian Gulf seawater in EOR:effects of different ions on interfacial tension,contact angle,zeta potential,and oil recovery

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Petroleum Science 2021年第3期18卷 895-908页

作者： amir Hossein Saeedi Dehaghani Seyed masoud Ghalamizade Elyaderani Department of Petroleum Engineering Faculty of Chemical EngineeringTarbiat Modares UniversityTehranIran

In this study,we initially performed interfacial tension(IFT)tests to investigate the potential of using the Persian Gulf seawater(PGSW)as smart water with diferent concentrations of NaCl,KCl,MgCl_(2),CaCl_(2),and Na_(2)SO_(4).Next,for each salt,at the concentration where IFT was minimum,we conducted contact angle,zeta potential,and micromodel fooding *** results showed that IFT is minimized if NaCl or KCl is removed from PGSW;thus,for solutions lacking NaCl and KCl,the IFT values were obtained at 26.29 and 26.56 mN/m,***,in the case of divalent ions,minimum IFT occurred when the concentration of MgCl_(2),CaCl_(2),and Na_(2)SO_(4) in PGSW ***,a threefold rise in the concentration of Na_(2)SO_(4) further reduced IFT as compared to optimal concentrations of MgCl_(2) or CaCl_(2).It should be mentioned that eliminating NaCl from PGSW resulted in the lowest IFT value compared to adding or removing other *** the removal of NaCl caused the contact angle to decrease from 91.0°to 67.8°relative to PGSW and changed surface wettability to weakly water-wet,eliminating KCl did not considerably change the contact angle,such that it only led to a nine-degree reduction in this angle relative to PGSW and left wettability in the same neutral-wet *** optimal concentrations of MgCl_(2),CaCl_(2),and Na_(2)SO_(4),only an increase in Na_(2)SO_(4) concentration in PGSW could change wettability from neutral-wet to weakly *** solutions with optimal concentrations,the removal of NaCl or KCl caused the rock surface to have slightly higher negative charges,and increasing the concentration of divalent ions led to a small reduction in the negative charge of the *** results of micromodel fooding indicated that NaCl-free PGSW could raise oil recovery by 10.12%relative to ***,when the Na_(2)SO_(4) concentration in PGSW was tripled,the oil recovery increased by 7.34%compared to ***,depending on th

关键词： Smart water Minimum IFT Wettability Zeta potential Enhanced oil recovery