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Secure sma.t contra.t-ba.ed digita. twins for the Internet of Things

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BLOCKCHa.N-rESEa.CH a.D a.PLICa.IONS 2024年第1期5卷 39-49页

作者： Pitta.a., Ia.ovos Fotiou, Nikos Ka.a.a.a., Christos Siris, Va.ilios a. Polyzos, George C. a.hens Univ Econ & Business Sch Informat Sci & Technol Dept Informat Mobile Multimedia Lab Athens 10434 Greece Chinese Univ Hong Kong Sch Data Sci Shenzhen 518172 Peoples R China

The prolifera.ion of Internet of Things (IoT) devices tha. opera.e una.tended providing a.multitude of importa.t a.d often sensitive services highlights the need for sea.less interopera.ility a.d increa.ed security. We a.gue tha. digita. twins of IoT devices, with the right design, ca. enha.ce the security, relia.ility, a.dita.ility, a.d interopera.ility of IoT systems. The sa.ient fea.ures of digita. twins ha.e ma.e them key elements for the IoT a.d Industry 4.0. In this pa.er, we levera.e a.va.ces in W3C's Web of Things (WoT) sta.da.ds a.d distributed ledger technologies (DLTs) to present a.novel design of the sma.t contra.t-ba.ed digita. twins with enha.ced security, tra.spa.ency, interopera.ility, a.d relia.ility. We provide two different va.ia.ions of tha. genera. design using two different blockcha.ns (one public a.d one priva.e, permissioned blockcha.n), a.d we present design tra.eoffs. Furthermore, we introduce a. a.chitecture for a.cessing a.d controlling IoT devices securely a.d relia.ly, providing full a.dita.ility, while a. the sa.e time using the proposed digita. twins a. a. indirection mecha.ism (proxy). The proposed a.chitecture levera.es the blockcha.n to offer nota.le properties, na.ely,decentra.iza.ion, immuta.ility, a.dita.ility, non-repudia.ion, a.a.la.ility, a.d relia.ility. Moreover, it introduces ma.s a.tua.ion, ea.ier ma.a.ement of IoT devices, a.d enha.ced security to the IoT ga.ewa.s, ena.les new business models, a.d ma.es consumer devices (vendor-)a.nostic.

关键词： Digita. twins Internet of Things Web of Things Distributed ledger technologies Hyperledger Fa.ric Ethereum

Pa.eoenvironmenta. cha.ges recorded by gra.n size of loess/pa.eosol sequence from the Chifeng City,Northea.tern China.since the La.t Gla.ia.

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Journa. of Mounta.n Science 2024年第9期21卷 3068-3082页

作者： LI Jua. BrYE Kristofor r ZHa.G Mengge JIa.G Zhuodong Wa.G Qiubing College of La.d a.d Environment Shenyang Agricultural UniversityShenyang 110866China Depa.tment of Crop Soiland Environmental SciencesUniversity of ArkansasFayettevilleAR 72701USA

The a.cumula.ion processes of loess in northea.tern(NE)China.record the va.ying cha.a.teristics of the Ea.t a.ia. Monsoons(Ea.)a.d the evolution of the loca. *** this study,gra.n size end-member a.a.ysis of the Da.iuga.g(DJG)section deposited since the La.t Gla.ia. in Chifeng City,NE China.wa. used to revea. the dyna.ic depositiona. cha.a.teristics of loess a.d environmenta. evolution of NE *** showed tha. the Chifeng loess comprises three gra.n size end-members(EM),EM1(7.38μm),EM2(49.4μm)a.d EM3(90.00μm),indica.ing the three tra.sport dyna.ics of dust delivered to the *** EM1 represents a.mospheric dust a. the *** EM2,ma.nly derived from rela.ively dista.t-sources deposition,a.d EM3,ma.eria. tra.sported over a.short dista.ce,correspond to the intensity of southwesterly winds a.d the Ea.t a.ia. Winter Monsoon(Ea.M),*** of clima.e reconstruction,combined with other records,showed tha. the clima.e wa. genera.ly cold a.d dry with a.strong Ea.M a.d a.wea. Ea.t a.ia. summer monsoon(Ea.M)during the sta.ia.-period[Ma.ine Isotope Sta.e(MIS)4 a.d MIS 2 sta.e].The clima.e wa. predomina.tly wa.m a.d humid,with wea. Ea.M a.d surfa.e winds a.d strong Ea.M in intersta.ia.-period(MIS 3 a.d MIS 1 sta.e).Compa.isons between indica.ors,e.g.,EM3,the Lr04 benthicδ18O sta.k a.d summer insola.ion a. 65°N suggest tha. the strong Ea.M is induced by increa.ing the Northern Hemisphere ice volume a.d reduced summer sola. ra.ia.ion.

关键词： Loess deposit Gra.n size end-member Northea.tern China Environmenta. cha.ge The La.t Gla.ia.

a. Electrica. Impeda.ce Ima.ing System Towa.ds Edge Intelligence for Non-Destructive Testing of Concrete

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Tsinghua.Science a.d Technology 2024年第3期29卷 883-896页

作者： a.olfa.l rosha.pa.a. Ma.di a.ba.i Ha.i a.ta. a.ma. a.er mohamma. r.Khosra.i a.med a.Solyma. Depa.tment of Electrica. Engineering Islamic Azad UniversityScience and Research BranceTehran ***Iran Depa.tment of Computer Engineering Bu-Ali Sina UniversityHamedan ***Iran Depa.tment of Energy Engineering Zarqa UniversityZarqa 13110Jordan Depa.tment of Computer Engineering Persian Gulf UniversityBushehr ***Iran Depa.tment of Electrica. a.d Electronics Engineering Faculty of Engineering and ArchitectureNişantaşıUniversityIstanbul 34398Turkey

In the construction industry,to prevent a.cidents,non-destructive tests a.e necessa.y a.d *** impeda.ce tomogra.hy is a.new technology in non-inva.ive ima.ing in which the ima.e of the inner pa.t of conductive bodies is reconstructed by the a.ra.s of externa. electrodes tha. a.e connected on the periphery of the *** equipment is chea.,fa.t,a.d edge *** this ima.ing method,the ima.e of electrica. conductivity distribution(or its opposite;electrica. impeda.ce)of the interna. pa.ts of the ta.get object is *** ima.e reconstruction process is performed by injecting a.precise electric current to the periphera. bounda.ies of the object,mea.uring the periphera. volta.es induced from it a.d processing the collected *** a. electrica. impeda.ce tomogra.hy system,the volta.es mea.ured in the periphera. bounda.ies ha.e a.non-linea. equa.ion with the electrica. conductivity *** pa.er presents a.chea. Electrica. Impeda.ce Tomogra.hy(EIT)instrument for detecting impurities in the concrete.a.volta.e-controlled current source,a.micro-controller,a.set of multiplexers,a.set of electrodes,a.d a.persona. computer constitute the structure of the *** conducted tests on concrete with impurities show tha. the designed EIT system ca. revea. impurities with a.good a.cura.y in a.rea.ona.le time.

关键词： non-destructive testing system concrete electrica. impeda.ce tomogra.hy

Mo_(2)P Monola.er a. a.Superior Electroca.a.yst for Urea.Synthesis from Nitrogen a.d Ca.bon Dioxide Fixa.ion:a.Computa.iona. Study

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Energy & Environmenta. Ma.eria.s 2024年第1期7卷 207-214页

作者： Dongxu Jia. Zhongxu Wa.g Yuejie Liu Qingha. Ca. Jingxia.g Zha. Ca.los r.Ca.rera.Zhongfa.g Chen College of Chemistry a.d Chemica. Engineering a.d Key La.ora.ory of Photonic a.d Electronic Ba.dga. Ma.eria.s Ministry of EducationHarbin Normal UniversityHarbin 150025China Modern Experiment Center Harbin Normal UniversityHarbin 150025China Heilongjia.g Province Colla.ora.ive Innova.ion Center of Cold region Ecologica. Sa.ety Harbin 150025China Depa.tment of Chemistry a.d Biochemistry The University of Texas at El PasoEl Paso TX 79968USA Depa.tment of Chemistry University of Puerto RicoRio Piedras CampusSan JuanPuerto Rico 00931USA

Urea.synthesis through the simulta.eous electroca.a.ytic reduction of N_(2)a.d CO_(2)molecules under a.bient conditions holds grea. promises a. a.susta.na.le a.terna.ive to its industria. production,in which the development of sta.le,highly efficient,a.d highly selective ca.a.ysts to boost the chemisorption,a.tiva.ion,a.d coupling of inert N_(2)a.d CO_(2)molecules rema.ns ra.her ***,by mea.s of density functiona. theory computa.ions,we proposed a.new cla.s of two-dimensiona. na.oma.eria.s,na.ely,tra.sition-meta. phosphide monola.ers(TM_(2)P,TM=Ti,Fe,Zr,Mo,a.d W),a. the potentia. electroca.a.ysts for urea.*** results showed tha. these TM_(2)P ma.eria.s exhibit outsta.ding sta.ility a.d excellent meta.lic ***,the Mo_(2)P monola.er wa. screened out a. the best ca.a.yst for urea.synthesis due to its sma.l kinetic energy ba.rier(0.35 eV)for C-N coupling,low limiting potentia.(-0.39 V),a.d significa.t suppressing effects on the competing side *** outsta.ding ca.a.ytic a.tivity of the Mo_(2)P monola.er ca. be a.cribed to its optima. a.sorption strength with the key^(*)NCON species due to its modera.e positive cha.ges on the Mo a.tive *** findings not only propose a.novel ca.a.yst with high-efficiency a.d high-selectivity for urea.production but a.so further widen the potentia. a.plica.ions of meta. phosphides in electroca.a.ysis.

关键词： C-N coupling density functiona. theory Mo_(2)P monola.er urea.synthesis

Weeks-a.ea. Epidemiologica. Predictions of Va.icella.Ca.es From Univa.ia.e Time Series Da.a.a.plying a.tificia. Intelligence

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Infectious Disea.es & Immunity 2024年第1期4卷 25-34页

作者： Da.id a.Wood DWa.Energy Limited Lincoln LN59JPUnited Kingdom

Ba.kground:"Chickenpox"is a.highly infectious disea.e ca.sed by the va.icella.zoster virus,influenced by sea.ona. a.d spa.ia. *** with va.icella.zoster epidemics ca. be a.substa.tia. dra.n on hea.th-a.thority *** tha. improve the a.ility to loca.ly predict ca.e numbers from time-series da.a.sets every week a.e therefore worth ***:Simple-to-extra.t trend a.tributes from published univa.ia.e weekly ca.e-number univa.ia.e da.a.sets were used to genera.e multiva.ia.e da.a.for Hunga.y covering 10 *** a.tribute-enha.ced da.a.set wa. a.sessed by ma.hine lea.ning(ML)a.d deep lea.ning(DL)models to genera.e weekly ca.e foreca.ts from next week(t0)to 12 weeks forwa.d(t+12).The ML a.d DL predictions were compa.ed with those genera.ed by multilinea. regression a.d univa.ia.e prediction ***:Support vector regression genera.es the best predictions for weeks t0 a.d t+1,wherea. extreme gra.ient boosting genera.es the best predictions for weeks t+3 to t+***-short-term memory only provides compa.a.le prediction a.cura.y to the ML models for week t+***-K-fold cross va.ida.ion revea.s tha. overa.l the lowest prediction uncerta.nty is a.socia.ed with the tree-ensemble ML ***:The novel trend-a.tribute method offers the potentia. to reduce prediction errors a.d improve tra.spa.ency for chickenpox timeseries.

关键词： Va.icella.zoster virus infection Disea.e-ca.e weekly predictions Weeks-a.ea. foreca.ting Univa.ia.e time-series enha.cements Tree-ensemble ma.hine lea.ning Time-series a.tribute extra.tion

Informa.ion Centric Networking Ba.ed Coopera.ive Ca.hing Fra.ework for 5G Communica.ion Systems

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Computers, Ma.eria.s & Continua 2024年第9期80卷 3945-3966页

作者： r.Ma.a.eera.a.na. Tha.a.a.a. Ta.ilvizhi Sonia.Jenifer ra.en Osa.a. Ibra.im Kha.a. Ha.ib Ha.a. Depa.tment of Computer Science a.d Engineering Saveetha School of EngineeringSaveetha Institute of Medical and Technical SciencesChennai602105India Depa.tment of Computer Science a.d Engineering Panimalar Engineering CollegeChennai600123India Depa.tment of Computer Science a.d Engineering Sathyabama Institute of Science and TechnologyChennai600119India Depa.tment of Sola. Energy Al-Nahrain Research Center for Renewable EnergyAl-Nahrain UniversityJadriyaBaghdad64074Iraq Fa.ulty of Engineering Universitéde MonctonNew BrunswickE1A3E9Canada Hodma. University College Mogadishu521376Somalia Bridges for a.a.emic Excellence Tunis1002Tunisia School of Electrica. Engineering University of JohannesburgAuckland ParkJohannesburg2006South Africa

The dema.ds on conventiona. communica.ion networks a.e increa.ing ra.idly beca.se of the exponentia. expa.sion of connected multimedia.*** light of the da.a.centric a.pect of contempora.y communica.ion,the informa.ion-centric network(ICN)pa.a.igm offers hope for a.solution by empha.izing content retrieva. by na.e instea. of *** 5G networks a.e to meet the expected da.a.dema.d surge from expa.ded connectivity a.d Internet of Things(IoT)devices,then effective ca.hing solutions will be required toma.imize network throughput a.dminimize the use of ***,a. ICN-ba.ed Coopera.ive Ca.hing(ICN-CoC)technique ha. been used to select a.ca.he by considering ca.he position,content a.tra.tiveness,a.d ra.e *** findings show tha. utilizing our suggested a.proa.h improves ca.hing rega.ding the Ca.he Hit ra.io(CHr)of 84.3%,a.era.e Hop Minimiza.ion ra.io(a.Mr)of 89.5%,a.d Mea. a.cess La.ency(Ma.)of 0.4 *** a.fra.ework,it suggests improved ca.hing stra.egies to ha.dle the difficulty of effectively controlling da.a.consumption in 5G *** improvements a.m to ma.e the network run more smoothly by enha.cing content delivery,decrea.ing la.ency,a.d relieving *** improving 5G communica.ion systems’ca.a.ity toma.a.e the dema.ds fa.ed by modern da.a.centric a.plica.ions,the resea.ch ultima.ely a.ds in a.va.cement.

关键词： Informa.ion-centric networking ca.hing schemes 5G communica.ion non-nega.ive ma.rix fa.toriza.ion(NMF) weighted clustering a.gorithm

Funda.enta. Understa.ding on Selenium Electrochemistry:From Electrolytic Cell to a.va.ced Energy Stora.e

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Energy & Environmenta. Ma.eria.s 2024年第3期7卷 236-256页

作者： Jiguo Tu Cheng Cha.g Jingxiu Wa.g Ha.ping Lei r.Va.a.t Kuma. Mingyong Wa.g Shuqia.g Jia. Sta.e Key La.ora.ory of a.va.ced Meta.lurgy University of Science and Technology BeijingBeijing 100083China School of Chemica. Engineering The University of AdelaideAdelaideSA 5005Australia School of Meta.lurgica. a.d Ecologica. Engineering University of Science and Technology BeijingBeijing 100083China Depa.tment of Ma.eria.s Science a.d Meta.lurgy University of CambridgeCambridge CB30FSUK

Selenium(Se),a. a. importa.t qua.i-meta. element,ha. a.tra.ted much a.tention in the fields of thin-film sola. cells,electroca.a.ysts a.d energy stora.e a.plica.ions,due to its unique physica. a.d chemica. ***,the electrochemica. beha.ior of Se in different systems from electrolytic cell to ba.tery a.e complex a.d not fully *** this a.ticle,we focus on the electrochemica. processes of Se in a.ueous solutions,molten sa.ts a.d ionic liquid electrolytes,a. well a. the a.plica.ion of Se-conta.ning ma.eria.s in energy ***,the electrochemica. beha.iors of Se-conta.ning species in different systems a.e comprehensively summa.ized to understa.d the complexity of the kinetic processes a.d guide the Se ***,the rela.ionship between the deposition conditions a.d resulting structure a.d morphology of electrodeposited Se is discussed,so a. to regula.e the morphology a.d composition of the ***,the a.va.ced energy stora.e a.plica.ions of Se in thin-film sola. cells a.d seconda.y ba.teries a.e reviewed,a.d the electrochemica. rea.tion processes of Se a.e systema.ica.ly comprehended in monova.ent a.d multiva.ent meta.-ion *** on understa.ding the funda.enta. electrochemistry mecha.ism,the future development directions of Se-conta.ning ma.eria.s a.e considered in view of the in-depth review of rea.tion kinetics a.d energy stora.e a.plica.ions.

关键词： electrochemica. beha.iors electrodeposition electrolytes energy stora.e selenium

Va.illin Ba.ed Polymers:***(hydrova.illoin-furfura.)a.d Poly(hydrova.illoin-5-hydroxymethylfurfura.)

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Journa. of renewa.le Ma.eria.s 2024年第9期12卷 1495-1506页

作者： a.a.da.S.a.a.a.eka.a.Ga.riel Murillo Mora.es ra.ha.a.r.Komma.a.a.i Depa.tment of Chemistry Prairie View A&M University700 University DrivePrairie ViewTX 77446USA Center for Energy&Environmenta. Susta.na.ility Prairie View A&M University700 University DrivePrairie ViewTX 77446USA Depa.tment of Civil a.d Environmenta. Engineering Prairie View A&M University700 University DrivePrairie ViewTX 77446USA

renewa.le resources ba.ed polymers provides a.susta.na.le a.terna.ive to petroleum derived polymeric *** a.pa.t of our series on synthesis of va.illin ba.ed renewa.le polymers,we report the synthesis of poly(hydrova.illoin-furfura.)[poly(HVL-Fur)]a.d poly(hydrova.illoin–5-hydromethylfurfura.)[poly(HVL-5-HMF)].Va.illin wa. dimerized to a.mixtures of meso/DL-hydrova.illoins with 94%meso product by electrochemica. reductive coupling in a.ueous sodium hydroxide using lea. electrodes in qua.tita.ive *** sodium hydroxide ca.a.yzed condensa.ion of hydrova.illoin with furfura. in wa.er a. 80℃for 72 h wa. used to synthesize poly(HVL-Fur)with Mw=8600 g mol^(−1),PDI=1.28 in 78%***,condensa.ion of hydrova.illoin with 5-hydroxymethylfurfura. a. 80℃for 48 h produced poly(HVL-5-HMF)with Mw=12,100 g mol−1,PDI=1.27 in 68%***(HVL-Fur)a.d poly(HVL-5-HMF)showed simila. Tg va.ues of 59℃a.d 60℃,respectively;wherea. melting beha.iors a.e dissimila. with Tm 171℃–173℃a.d 148℃–182℃,respectively.

关键词： Va.illin hydrova.illoin furfura. 5-hydroxymethylfurfura. renewa.le polymers

Effects of high glucose a.d severe hypoxia.on the biologica. beha.ior of mesenchyma. stem cells a. va.ious pa.sa.es

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World Journa. of Stem Cells 2024年第4期16卷 434-443页

作者： Fa.ima. a.ma.a.neh Ejla. a.u-El-rub ra.a.a.r Kha.a.neh ra.a. a.ma.a.i Depa.tment of Ba.ic medica. Sciences Faculty of MedicineYarmouk UniversityIrbid 21163Jordan

Ba.KGrOUND Mesenchyma. stem cells(MSCs)ha.e been extensively studied for thera.eutic potentia.,due to their regenera.ive a.d immunomodula.ory *** pa.sa.e a.d stress fa.tors ma. a.fect the biologica. cha.a.teristics of MSCs,but the deta.ls of these effects ha.e not been recognized *** To investiga.e the effects of stress fa.tors(high glucose a.d severe hypoxia.on the biologica. cha.a.teristics of MSCs a. different pa.sa.es,in order to optimize the thera.eutic a.plica.ions of *** In this study,we investiga.ed the impa.t of two stress conditions;severe hypoxia.a.d high glucose on huma. a.ipose-tissue derived MSCs(ha.-MSCs)a. pa.sa.es 6(P6),P8,a.d ***,senescence a.d a.optosis were eva.ua.ed mea.uring WST-1,senescence-a.socia.ed beta.ga.a.tosida.e,a.d a.nexin V,*** Cells a. P6 showed decrea.ed prolifera.ion a.d increa.ed a.optosis under conditions of high glucose a.d hypoxia.compa.ed to control,while the extent of senescence did not cha.ge significa.tly under stress *** P8 ha.-MSCs cultured in stress conditions ha. a.significa.t decrea.e in prolifera.ion a.d a.optosis a.d a.significa.t increa.e in senescence compa.ed to counterpa.t cells a. *** cultured in high glucose a. P10 ha. lower prolifera.ion a.d higher senescence tha. their counterpa.ts in the previous pa.sa.e,while no cha.ge in a.optosis wa. *** the other ha.d,MSCs cultured under hypoxia.showed decrea.ed senescence,increa.ed a.optosis a.d no significa.t cha.ge in prolifera.ion when compa.ed to the sa.e conditions a. *** These results indica.e tha. stress fa.tors ha. distinct effects on the biologica. processes of MSCs a. different pa.sa.es,a.d suggest tha. senescence ma. be a.protective mecha.ism for MSCs to survive under stress conditions a. higher pa.sa.e numbers.

关键词： Mesenchyma. stem cells High glucose Hypoxia Stressful microenvironment Seria. pa.sa.e Senescence a.optosis