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a.critica. litera.ure review of security a.d priva.y in sma.t home hea.thca.e schemes a.opting IoT&blockcha.n:Problems,cha.lenges a.d solutions

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Blockcha.n(Resea.ch a.d a.plica.ions) 2024年第2期5卷 13-61页

作者： Olusogo popoola Ma.cos Rodrigues Jims Ma.cha.g a.ex Shenfield a.gustine Ikpeha. Jumoke popoola Depa.tment of Computing Sheffield Hallam UniversitySheffieldS11WBUK Depa.tment of Engineering a.d Ma.h Sheffield Hallam UniversitySheffieldS11WBUK

Protecting priva.e da.a.in sma.t homes,a.popula. Internet-of-Things(IoT)a.plica.ion,rema.ns a.significa.t da.a.security a.d priva.y cha.lenge due to the la.ge-sca.e development a.d distributed na.ure of IoT ***,sma.t hea.thca.e ha. levera.ed sma.t home systems,thereby compounding security concerns in terms of the confidentia.ity of sensitive a.d priva.e da.a.a.d by extension the priva.y of the da.a.***,proof-of-a.thority(Poa.-ba.ed blockcha.n distributed ledger technology(DLT)ha. emerged a. a.promising solution for protecting priva.e da.a.from indiscrimina.e use a.d thereby preserving the priva.y of individua.s residing in IoT-ena.led sma.t *** review elicits some concerns,issues,a.d problems tha. ha.e hindered the a.option of blockcha.n a.d IoT(BCoT)in some doma.ns a.d suggests requisite solutions using the a.ing-in-pla.e *** issues with BCoT were exa.ined a. well a. the combined cha.lenges BCoT ca. pose when utilised for security *** study discusses recent findings,opportunities,a.d ba.riers,a.d provides recommenda.ions tha. could fa.ilita.e the continuous growth of blockcha.n a.plica.ions in ***,the study explored the potentia. of using a.Poa.ba.ed permission blockcha.n with a. a.plica.le consent-ba.ed priva.y model for decision-ma.ing in the informa.ion disclosure process,including the use of publisher-subscriber contra.ts for fine-gra.ned a.cess control to ensure secure da.a.processing a.d sha.ing,a. well a. ethica. trust in persona. informa.ion disclosure,a. a.solution *** proposed a.thorisa.ion fra.ework could gua.a.tee da.a.ownership,conditiona. a.cess ma.a.ement,sca.a.le a.d ta.per-proof da.a.stora.e,a.d a.more resilient system a.a.nst threa. models such a. interception a.d insider a.ta.ks.

关键词： IoT Sma.t home hea.thca.e Poa.ba.ed permissioned blockcha.n a.thorisa.ion fra.ework Fine-gra.ned a.cess control Interception Priva.y model Consent

Impa.t of Rela.ive Dose Intensity (RDI) on Surviva. in Non-Meta.ta.ic Brea.t Ca.cer: Nigeria. Experience

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Journa. of Biosciences a.d Medicines 2024年第7期12卷 120-131页

作者： Sa.ira.B. L. Ma.a.juola.a.iodun Ola.iyi popoola Mobola.i a.ewa.e Oluda.a Depa.tment of Pha.ma.ology College of Medicine Lagos State University (LASUCOM) Lagos Nigeria Depa.tment of Ra.iology & Oncology College of Medicine Lagos State University (LASUCOM) Lagos Nigeria Depa.tment of Surgery Lagos State Teaching Hospital (LASUTH) Lagos Nigeria

Ba.kground: This study wa. initia.ed to determine pra.tices pa.terns in a.juva.t chemothera.y for non-meta.ta.ic brea.t ca.cer a.d to exa.ine the rela.ionship between received dose intensity (RDI) a.d surviva. in pa.ients with brea.t ca.cer Nigeria. Methods: Our study wa. a.retrospective a.a.ysis of pa.ients with brea.t ca.cer recruited from 2012 a.d 2015. a.tota. of 204 pa.ients were initia.ly entered into the study, 102 were lost to follow-up lea.ing 102 pa.ients who were suita.le for the surviva. a.a.ysis. Surviva. time wa. ca.cula.ed from 106 da.s, the scheduled end of chemothera.y. Results: The tota. a.era.e RDI for pa.ients wa. 74%. Over the 204 pa.ients tha. were reviewed, 144 (70.6%) ha. some reduction of RDI. This subgroup ha. a. a.era.e RDI of 63%. On a.era.e, 79% of the intended dose of chemothera.y wa. given. The time to completion of chemothera.y wa. 1.33 times tha. specified by the protocol. Dose dela.s a. overa.l reduction wa. ma.nly a.tributed to intolera.ility a.d fina.cia. constra.nts. Surviva. by RDI showed a.significa.t decrea.e in surviva. ra.e for pa.ients with RDI of >49% (Ha.a.d Ra.io = 3.473, 95% CI 1.21 - 9.91, P = 0.020);RDI of 50% - 59% (Ha.a.d Ra.io = 3.916, 95% CI 1.01 - 15.18, P = 0.048);RDI of 60% - 69% (Ha.a.d Ra.io = 4.462, 95% CI 1.65 - 12.03, P = 0.003) compa.ed with pa.ients who received a. RDI of 100%. a.though a.socia.ed with poorer prognosis, there were no significa.t cha.ges in the surviva. ra.e for pa.ients with RDI of 70% - 79% (Ha.a.d Ra.io = 1.667, 95% CI 0.56 - 4.96, P = 0.359);RDI of 80% - 89% (Ha.a.d Ra.io = 1.620, 95% CI 0.47 - 5.53, P = 0.441);RDI 90% - 99% (Ha.a.d Ra.io = 1.590, 95% CI 0.53 - 4.73, P = 0.405) compa.ed with pa.ients who received a. RDI of 100%. Conclusion: This study provides evidence tha. decrea.ed RDI of a.ta.ic brea.t ca.cer pa.ients is strongly a.socia.ed with decrea.ed overa.l surviva..

关键词： Brea.t Ca.cer Chemothera.y RDI Surviva. Ra.e

Improved pea. loa. ma.a.ement control technique for nonlinea. a.d dyna.ic residentia. energy consumption pa.tern

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Building Simula.ion 2021年第1期14卷 195-208页

作者： Ola.a.e popoola MoreBlessing Chipa.go Electrica. Depa.tment&Centre for Energy&Electrica.Power Tshwane University of TechnologyPretoriaGautengSouth Africa

a.va.cements in computa.iona. technologies for residentia. energy ma.a.ement ha.e become widesprea. due to increa.ed energy usa.e a.d pea. dema.d in *** switching of a.plia.ces during pea. periods for energy reduction is one of such ***,this technique ma. constrict the consumer’s flexibility to utilize desired a.plia.ces to fulfil their *** study proposes a.pea. loa. control technique ba.ed on a. end-use a.plia.ce prioritiza.ion a.d event detection a.gorithm.a.noteworthy fea.ure of the technique is the users’preferred a.plia.ce(UPa.,which provides the occupa.ts with the flexibility to use a.y electric loa. to fulfill their needs a. a.y time whether pea. dema.d control ha. been initia.ed or ***,to a.dress the cha.lenging issue a.ound the uncerta.n a.d va.ying na.ure of the users’energy usa.e pa.tern,a. empirica. bottom-up a.proa.h is a.opted to cha.a.terize the consumers’diverse end-use *** results obta.ned show good performa.ce in terms of pea. dema.d a.d energy consumption reduction,with 3%to 20%a.d a. lea.t 14.05%in dema.d reduction for time of use(ToU)periods a.d energy sa.ings,*** offer a.further perspective on dema.d side ma.a.ement,a.fording loa. users a.new cost-sa.ing energy usa.e pa.tern.

关键词： bottom-up a.proa.h energy usa.e loa. prioritiza.ion pea. loa. preferred a.plia.ce time of use

a.ti-Corrosion a.d Tribo-Mecha.ica. Properties of Co-deposited Zn–SnO_2 Composite Coa.ing

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a.ta.Meta.lurgica.Sinica.English Letters) 2015年第4期28卷 521-530页

作者： Ojo Sunda. Isa.c Fa.omi a.imbola.Pa.ricia.Idowu popoola Depa.tment of Chemica. Metallurgical and Materials EngineeringTshwane University of Technology Depa.tment of Mecha.ica. Engineering Covenant University

Zn-SnO2 composite coa.ings were prepa.ed by direct potentia. using electrolytic co-deposition technique from sulfa.e solution. The effect of Zn2＋ a.d SnO2 concentra.ions in deposited ba.h on the mecha.ica. properties a.d mor- phologica. cha.a.teristics of the composite coa.ings were exa.ined. The cha.a.teriza.ions of the sa.ple were a.a.yzed using sca.ning electron microscopy couple with energy dispersive spectroscopy （SEM/EDS）, X-ra. diffra.tion （XRD） a.d a.omic force microscopy （a.M）. The electrochemica. degra.a.ion beha.ior of the sa.ples in 3.65 wt.% Na.l solution wa. studied using potentiodyna.ic pola.iza.ion technique a.d cha.a.terized by high-resolution optica. microscope. From a.l the fa.rica.ed composite coa.ings, obvious diffra.tion pea.s were observed with Zn-7Sn-S-0.3V film with Zn2Sn7, Sn, Zn2Sn5 a.d Zn pha.es, confirming the presence a.d forma.ion of Zn-SnO2 coa.ing. The XRD pa.tern shows tha. the presences of SnO2 pa.ticle rema.ka.ly pla. a.ma.or role in the precipita.ion a.d orienta.ion of the a.loy ma.rix. From the SEM/EDS a.d a.M results, the deposits show tha. composite pa.ticle a.d proper ba.h composition ha.e strong influence on the microstructure. a. enha.ced corrosion resista.ce wa. a.ta.ned a. a.result of the induced pa.ticles.

关键词： Meta. ma.rix composite Co-deposition Mecha.ica. property Corrosion resista.ce

Occurrence a.d Levels of Chlorina.ed Pesticides Residues in Cow Milk: a.Huma. Hea.th Risk a.sessment

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Journa. of a.ricultura. Chemistry a.d Environment 2019年第1期8卷 58-67页

作者： Ola.inka.a.idemi Ibigba.i ademola Festus a.yesa.mi a.eolu Jona.ha. a.esina.Olugbenga.Ka.ode popoola Depa.tment of Chemistry Ekiti State University Ado-Ekiti Nigeria Depa.tment of Chemistry The Federal University of Technology Akure Nigeria

Ba.kground: The study determined the presence a.d concentra.ion of persistent orga.ochlorine pesticides (OCPs) residues in cow milk from Ekiti Sta.e University a.ricultura. fa.m in a.o-Ekiti, Nigeria. The study wa. investiga.ed in order to monitor consumer’s exposure to these chemica.s pesticides. Methods: Qua.ita.ive identifica.ion a.d qua.tifica.ion eva.ua.ion of the extra.ted pesticides a.ter clea.-up on silica.gel were done with a.Ga. Chroma.ogra.hy coupled with a. Electron Ca.ture Detector (GC-ECD). Results: The results revea.ed the presence of 11 OCPs residues in the milk sa.ples, with concentra.ion ra.ge of 0.001 - 0.189 mg/l, while α-BHC, endrin, endrin a.dehyde, endosulfa. II, endosulfa. sulpha.e a.d methoxychlor were not detected. The a.a.ysis of va.ia.ce revea.ed no significa.t va.ia.ion in the levels of a.l the a.a.ysed pesticides except dieldrin. Conclusion: The ha.a.d indices (HIs) were significa.tly lower tha. 1 with the ra.ge of 0.00063 - 0.107, indica.ing no potentia. hea.th risk.

关键词： Cow Milk Orga.ochlorine Pesticides Ga. Chroma.ogra.hy Risk a.sessment

Pa.a.etric study of spa.k pla.ma.sintering of a._(20)Cr_(20)Fe_(25)Ni_(25)Mn_(10) high entropy a.loy with improved microha.dness a.d corrosion

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Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2022年第1期29卷 119-127页

作者： a.dries Mthisi Nicholus Ma.a.ji a.Pa.ricia.I.popoola L.Rudolf Ka.ya.e Depa.tment of Chemica. Metallurgical and Materials EngineeringTshwane University of TechnologyP.M.B.X680PretoriaSouth Africa

Multicomponent a._(20)Cr_(20)Fe_(25)Ni_(25)Mn_(10) a.loys were synthesized using spa.k pla.ma.sintering a. different tempera.ures(800,900,a.d 1000℃)a.d holding times(4,8,a.d 12 min)to develop a.high entropy a.loy(HEa..The cha.a.teristics of spa.k pla.ma.synthesized(SPSed)a.loys were experimenta.ly explored through investiga.ion of microstructures,microha.dness,a.d corrosion using sca.ning electron microscopy coupled with energy dispersive spectroscopy(EDS),Vickers microha.dness tester,a.d potentiodyna.ic pola.iza.ion,*** diffra.tion(XRD)cha.a.teriza.ion wa. employed to identify the pha.es formed on the developed *** EDS results revea.ed tha. the a.loys consisted of elements selected in this work irrespective of va.ying sintering *** XRD,EDS,a.d sca.ning electron microscopy collectively provided evidence tha. the fa.rica.ed a.loys were cha.a.terized by globula. microstructures exhibiting fa.e-centered cubic pha.e,which wa. formed on a.ba.is of solid solution *** finding implies tha. the SPSed a.loy showed the fea.ures of *** a.loy produced a. 1000℃ a.d holding time of 12 min portra.ed a. optima. microha.dness of HV 447.97,but the va.ue decrea.ed to HV 329.47 a.ter hea. *** sa.e a.loy showed a. outsta.ding corrosion resista.ce *** increa.e in tempera.ure resulted in a. a._(20)Cr_(20)Fe_(25)Ni_(25)Mn_(10) a.loy with superior density,microha.dness,a.d corrosion resista.ce over the other a.loys developed a. different pa.a.eters.

关键词： high entropy a.loy spa.k pla.ma.sintering microha.dness corrosion

a.ticorrosion properties a.d thin film composite deposition of ZnSiC-Cr_3C_2 coa.ing on mild steel

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Defence Technology（防务技术） 2019年第1期15卷 106-110页

作者： a.a.a.oola.O.S.I.Fa.omi a.P.I.popoola Chemica. Engineering Depa.tment Covenant University Chemica. Metallurgical and Materials Engineering DepartmentTshwane University of Technology Mecha.ica. Engineering Depa.tment Covenant University

This work considered the influence of Cr3 C2 pa.ticle loa.ing on microstructure a.d mecha.ica. properties of Zn-SiC-Cr3 C2 na.ocomposite produced via.electrocodeposition a.e investiga.ed. The surfa.e na.ure of the na.ocomposite coa.ings were cha.a.terized using sca.ning electron microscope(SEM)coupled with the energy dispersive spectrometer(EDS). a.ra.ive wea. beha.iour a.d ha.dness property of Zn-SiC-Cr3 C2 na.ocomposite produced were investiga.ed using CERT UMT-2 multi-functiona. tribologica. tester a.d Dura.Sca. ha.dness tester. The corrosion property wa. eva.ua.ed through linea. pola.iza.ion a.proa.h. The result showed tha. the coa.ings exhibited good sta.ility a.d Cr_3 C_2 na.ocomposite loa.ing significa.tly improved the micro structura. performa.ce, ha.dness property,wea. resista.ce a. well a. corrosion resista.ce of the coa.ings.

关键词： Zn-SiC-Cr3C2 Electrodeposition Coa.ings Corrosion resista.ce Ha.dness

Effect of Nb a.dition on the microstructura.,mecha.ica. a.d electrochemica. cha.a.teristics of a.CrFeNiCu high-entropy a.loy

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Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2020年第10期27卷 1332-1340页

作者： N.Ma.a.ji a.P.I.popoola T.Lengopeng S.Pitya.a Tshwa.e University of Technology PretoriaSouth Africa Council for Scientific a.d Industria. Resea.ch PretoriaSouth Africa

a.CrFeNiCuNbx(x=0.05,0.15,a.d 0.26)high-entropy a.loys(HEa.)were successfully fa.rica.ed using the la.er meta. deposition *** la.er power of 1600 W a.d sca.ning speed of 1.2 m/min were used during la.er processing of the *** microstructura.,mecha.ica.,a.d electrochemica. cha.a.teristics of the a.loys were eva.ua.ed using va.ious a.va.ced cha.a.teriza.ion *** showed tha. the a.loys exhibited a.dua.-pha.e structure with dendritic *** inclusion of Nb in the a.CrFeNiCu a.loy ma.rix promoted the forma.ion of fine eutectic structures a.d cha.ged the sha.e of the gra.ns from columna. to *** Cu content decrea.ed with the increa.e in the content of Nb,wherea. the a. content increa.ed with the increa.e in the content of *** findings indica.ed tha. the presence of Nb in the a.loy promoted the forma.ion a.d enha.ced the sta.ility of the body-centered cubic(bcc)*** of the a.loys tha. conta.ned Nb a.so exhibited high ha.dness,compressive strength,a.d wea. ***,the low current density a.d positive shift in potentia. exhibited by HEa. with a.propria.e a.dition of Nb highlighted the superior a.ticorrosive properties.

关键词： high-entropy a.loys microstructure microha.dness friction wea. loss corrosion resista.ce

Inhibition effect of 2-a.ino-5-ethyl-1,3,4-thia.ia.ole on corrosion beha.iour of a.stenitic sta.nless steel type 304 in dilute HCl solution

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Journa. of Centra. South University 2016年第2期23卷 258-268页

作者： Rola.d T.Loto Cleopha. a.Loto a.imbola.P.popoola Ta.ia.a.Fedotova Depa.tment of Mecha.ica. Engineering Covenant UniversityOtaOgun StateNigeria Depa.tment of Chemica. Metallurgical&Materials EngineeringTshwane University of TechnologyPretoriaSouth Africa

The corrosion inhibition of type 304 a.stenitic sta.nless steel by 2-a.ino-5-ethyl-1, 3, 4-thia.ia.ole(TTD) compound a.d the electrochemica. beha.iour in dilute HCl solution were investiga.ed through potentiodyna.ic pola.iza.ion test, ma.s loss techniques a.d potentia. mea.urements. The results show tha. the orga.ic deriva.ive is highly effective with a.ma.imum inhibition efficiency of 70.22% from ma.s loss a.a.ysis, while 74.2% is obta.ned from pola.iza.ion tests. Observa.ion of the sca.ning electron microgra.hs shows the a.sence of corrosion products due to electrochemica. influence of TTD on the surfa.e morphology of the steel. X-ra. diffra.tometry revea.s the a.sence of pha.e compounds a.d complexes on the steel sa.ples a.ter exposure. TTD a.sorption on the steel surfa.e obeys the La.gmuir, Frumkin a.d Freundlich a.sorption isotherms. Corrosion thermodyna.ic ca.cula.ions revea. the inhibition mecha.ism occurs through chemisorption process a.d results from sta.istica. a.a.ysis depict the strong influence of inhibitor concentra.ion on the electrochemica. performa.ce of the TTD.

关键词： thia.ia.ole a.sorption corrosion sta.nless steel inhibitor HCI