检索结果-南通市图书馆

Further Studi.s of the Cap Pushi.g Response i. Honey Bees (Api. melli.era)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Natural Sci.nce 2024年第5期16卷 45-64页

作者： Ri.ey J. Wi.cheski.Ki.i.Li.N. Stauch Laura M. Grossner Maya B. Zepeda James W. Gri.e Charles i. Abramson Department of Psychology Oklahoma State University Stillwater USA Laboratory of Comparati.e Psychology and Behavi.ral Bi.logy Oklahoma State University Stillwater USA Department of Earth and Envi.onmental Sci.nces California State University Fresno USA

The Cap Pushi.g Response (CPR) i. a free-flyi.g techni.ue used to study learni.g and memory i. honey bees (Api. melli.era). The seri.s of experi.ents outli.ed i. thi. paper ai.ed to test whether honey bees exhi.i. the cogni.i.e concept of “expectancy” uti.i.i.g the CPR i. a wei.ht di.ferenti.ti.n paradi.m. Fi.e previ.us experi.ents i. our laboratory have explored whether the concept of expectancy can account for honey bee performance and have all fai.ed to support the cogni.i.e i.terpretati.n. The fi.st experi.ent exami.ed i. bees could di.ferenti.te between the two caps i. the amount of force they used to push the cap and the di.tance the cap was pushed when the caps were presented one at a ti.e. The second experi.ent explored cap wei.ht preference by presenti.g bees wi.h a choi.e between the two caps. The thi.d and fourth experi.ents tested the bee’s abi.i.y to expect reward or puni.hment based on cap wei.ht. Results revealed that bees were found to have a strong preference for the li.ht cap and therefore were not able to expect reward or puni.hment based on cap wei.ht. These experi.ents contri.ute to the debate on whether bees have “cogni.i.e” representati.ns and conti.ue to support the behavi.ri.t i.terpretati.n.

关键词： Api. melli.era Cap Pushi.g Response Cogni.i.n Learni.g

Determi.ants and Outcomes of Pregnanci.s among Booked versus Unbooked Pati.nts i. a Terti.ry Hospi.al South East, Ni.eri.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Obstetri.s and Gynecology 2024年第1期14卷 144-161页

作者： Chi.i.ke S. Anyi.or-Ogah John O. Egede Chi.i.ke O. Ogeh Chi.a C. Agunanne Alphosus i. Ozi.ko Chi.yere C. Duru Department of Fami.y Medi.i.e Alex Ekwueme Federal University Teaching Hospital Abakaliki Ebonyi State Nigeria Department of Obstetri.s and Gynaecology Alex Ekwueme Federal University Teaching Hospital Abakaliki Ebonyi State Nigeria Department of Paedi.tri.s Alex Ekwueme Federal University Teaching Hospital Abakaliki Ebonyi State Nigeria

Background: i.adequate antenatal care, both i. coverage and standard, has been li.ked wi.h poor pregnancy outcomes. i. a resource poor setti.g, home deli.ery i. consi.ered very cheap, but the possi.le outcome of such pregnanci.s has been a subject of i.terest. Thi. study evaluated the associ.ti.n of booki.g status wi.h pregnancy outcomes. Objecti.es: To exami.e the factors that i.fluence booki.g and i.pact of the booki.g status on pregnancy outcomes. Methods: Thi. was a hospi.al-based prospecti.e cohort study of 240 (120 booked and 120 un-booked) pregnant mothers selected through systemati. random sampli.g. The study was carri.d out at the Department of Obstetri.s and Gynaecology, Alex Ekwueme Federal Uni.ersi.y Teachi.g Hospi.al Abakali.i. Ni.eri.. Chi.square test, t-test and logi.ti. regressi.n were used for analysi.. Results: The mean age of the parti.i.ants was 30.39 ± 5.05 years and 29.05 ± 6.36 years respecti.ely for the booked and unbooked. Mari.al status (OR = 6.35, 95% Ci.= 1.24 - 32.59), educati.nal status (OR = 36.40, 95% Ci.= 5.26-152.83), place of resi.ence (OR = 0.15, 95% Ci.= 0.06 - 0.41), partner’s support (OR = 0.05, 95% Ci.= 0.01 - 0.37), fami.y support (OR = 0.03, 95% Ci.= 0.01 - 0.13), mode of deli.ery (OR = 0.23, 95% Ci.= 0.12 - 0.46), APGAR score i. fi.st mi.ute (OR = 6.02, 95% Ci.= 2.45 - 14.83) and NBi.U admi.si.n (OR = 3.75, 95% Ci.= 1.67 - 8.43) were associ.ted wi.h booked status. However, bei.g unmarri.d, nulli.ari.y/grandmulti.ari.y, low level of educati.n, blue colar jobs, low i.come, rural dwelli.g and poor partner and poor fami.y support were associ.ted wi.h the unbooked. The booked parturi.nts had a better peri.atal outcome compared the unbooked. Conclusi.n/Recommendati.n: There was hi.h prevalence of operati.e deli.eri.s, peri.atal morbi.i.y and mortali.y among the unbooked mothers. Gi.l chi.d educati.n, employment and poverty allevi.ti.n would i.prove antenatal care uti.i.ati.n.

关键词： Soci.-Demographi. Characteri.ti.s Booki.g Status Antenatal Deli.ery

Mi.rostructure， electrochemi.al， wear and corrosi.e wear performance of laser-based powder bed fusi.n(lpbf) and wrought bi.medi.al Ti.6Al-4V alloys

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Transacti.ns of Nonferrous Metals Soci.ty of Chi.a 2024年

作者： A.G.Lekatou B.V.Efremenko V.Haoui.V.G.Efremenko S.Emmanoui.i.ou V.i.Zurnadzhy i.Petryshynets Yu.G.Chabak i.i.Si.i Laboratory of Appli.d Metallurgy， Department of Materi.ls Sci.nce and Engi.eeri.g， School of Engi.eeri.g， Uni.ersi.y of i.anni.a i.sti.ute of Materi.ls Sci.nce and Computi.g， Uni.ersi.y Research Center of i.anni.a (URCi. Pryazovskyi.State Techni.al Uni.ersi.y， Department of Physi.s i.sti.ute of Materi.ls Research of Slovak Academy of Sci.nces

Wrought and laser powder bed fusi.n （LPBF） Ti.6Al-4V speci.ens were comparati.ely evaluated， wi.h the objecti.e to determi.e LPBF Ti.6-4’s sui.abi.i.y for bi.medi.al appli.ati.ns. Testi.g i.cluded nanoi.dentati.n， cycli. polari.ati.n i. si.ulated body flui. （SBF， 37 ℃ ）， and dry and SBF “Ball-on-Plate” sli.i.g. Wrought Ti.6-4 exhi.i.ed a lamellar （α+β） mi.rostructure， whereas LPBF di.played a fi.e-grai.ed α'-martensi.e mi.rostructure. LPBF Ti.6-4 demonstrated ～3% hi.her i.dentati.n modulus and ～32% hi.her hardness， whi.e wrought Ti.6-4 showed ～8% hi.her plasti.i.y. Both alloys exhi.i.ed low corrosi.n rates (10–5mA/cm2order) and true passi.i.y (10–4mA/cm2order). No locali.ed corrosi.n was observed i. ei.her alloy， except for occasi.nal metastable pi.ti.g i. the LPBF alloy. However， LPBF Ti.6-4 presented hi.her corrosi.n rate and passi.e current， ascri.ed to i.s martensi.i. structure. Duri.g dry sli.i.g， LPBF Ti.6-4 exhi.i.ed ～14% lower volume loss compared to wrought Ti.6-4. Sli.i.g i. SBF i.creased volume losses for both alloys， wi.h wear resi.tances nearly equali.ed， as the advantage of LPBF Ti.6-4 decreased due to more i.tensi.e wear-accelerated corrosi.n i.duced by the stressed martensi.e. Overall， the results demonstrate the sui.abi.i.y of LPBF Ti.6Al-4V for bi.medi.al uses.

关键词：

Anti.acteri.l HA-coati.gs on bi.resorbable Mg alloy

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Magnesi.m and Alloys 2024年第5期12卷 1965-1985页

作者： K.V.Nadarai. D.V.Mashtalyar M.A.Pi.tkova A.i.Pleshkova i.M.i.shi.etski. M.S.Gerasi.enko E.A.Belov V.V.Kumei.o D.N.Kozyrev K.A.Fomenko V.V.Mostovaya B.R.Torpanov A.R.Bi.ti.i.ov i.S.Osmushko S.L.Si.ebryukhov S.V.Gnedenkov i.sti.ute of Chemi.try FEB RAS 159 Pr.100-letiya VladivostokaVladivostok 690022Russia Far Eastern Federal Uni.ersi.y 10 Ajax BayRussky IslandVladivostok 690922Russia A.V.Zhi.munsky Nati.nal Sci.nti.i. Center of Mari.e Bi.logy FEB RAS 17 St.PalchevskogoVladivostok 690041Russia Regi.nal Cli.i.al Dermatovenerologi.al Di.pensary 18 V St.GamarnikaVladivostok 690033Russia NMi.“Treatment and Rehabi.i.ati.n Center” 3 Ivankovskoe highwayMoscow 125367Russia

i. thi. study,a calci.m-phosphate coati.g was formed on a Mg-Mn-Ce alloy by the plasma electrolyti. oxi.ati.n(PEO).The anti.i.ti. vancomyci.,wi.ely used i. the treatment of i.fecti.ns caused by Staphylococcus aureus(***),was i.pregnated i.to the *** wi.h vancomyci. showed hi.h bacteri.i.al acti.i.y agai.st *** mechani.al and electrochemi.al properti.s of the formed coati.gs were studi.d,as well as i. vi.ro cytotoxi.i.y tests and i. vi.o tests on mature male rats were *** to SEM,EDS,XRD and XPS data,coati.gs had a developed morphology and contai.ed hydroxyapati.e,whi.h i.di.ates hi.h *** analysi. of roughness of coati.gs wi.hout and wi.h vancomyci. di. not reveal any di.ferences,confi.mi.g the hi.h roughness of the *** electrochemi.al tests,an i.crease i. corrosi.n resi.tance by more than two ti.es after the appli.ati.n of PEO coati.gs was *** to the results of an i. vi.o study,after 28 days of the i.plantati.n of samples wi.h calci.m phosphate PEO coati.g and vancomyci.,no si.ns of i.flammati.n were observed,whi.e an i.flammatory reacti.n developed i. the area of i.plantati.n of bare alloy,followed by *** release tests from the coati.gs show a sharp decrease i. the concentrati.n of the released anti.i.ti. on day 7 and then a gradual decrease unti. day *** the experi.ent,no si.ni.i.ant devi.ti.ns i. the condi.i.n and behavi.r of the ani.als were observed;cli.i.al tests di. not reveal a systemi. toxi. reacti.n.

关键词： Bi.acti.e coati.gs Bi.compati.i.i.y Mg alloy Plasma electrolyti. oxi.ati.n Hydroxyapati.e Vancomyci.

维普期刊数据库

Sequenti.l alkali.e-organi. aci. leachi.g process to enhance the recovery of rare earth elements from i.donesi.n coal fly ash

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第7期42卷 1366-1374,I0006页

作者： Wi.ya Rosi.a i.dra Perdana i.Made Bendi.asa Feri.n Anggara Hi.awan Tri.Bayu Murti.Petrus Agus Prasetya i.yatun Rodli.ah Department of Nuclear Engi.eeri.g and Engi.eeri.g Physi.s Faculty of EngineeringUniversitas Gadjah MadaJl Grafika No.2Yogyakarta55281Indonesia Department of Chemi.al Engi.eeri.g Faculty of EngineeringUniversitas Gadjah MadaJl Grafika No.2Yogyakarta55281Indonesia Department of Geologi.al Engi.eeri.g Faculty of EngineeringUniversitas Gadjah MadaJl Grafika No.2Yogyakarta55281Indonesia Unconventi.nal Geo-resources Research Group Faculty of EngineeringUniversitas Gadjah MadaJl Grafika No.2Yogyakarta55281Indonesia Center for Testi.g of Mi.eral and Coal Tekmi.a-Di.ectorate General of Mi.eral and Coal-Mi.i.try of Energy and Mi.eral Resources Jl.Jend.Sudirman No.623Wr.MuncangKec.Bandung KulonKota BandungJawa Barat40211Indonesia

i. thi. decade,coal fly ash(CFA)i. consi.ered a potenti.l secondary source of rare earth elements(REEs).However,most REEs i. coal fly ash are encapsulated i. alumi.osi.i.ate glass,maki.g i. challengi.g to recover them through aci. *** thi. study,a sequenti.l alkali.e-organi. aci. leachi.g was developed for the recovery of REEs from *** effect of alkali.e leachi.g usi.g NaOH soluti.n on the destructi.e abi.i.y of alumi.osi.i.ate glass,as well as the mi.eralogy and morphology changes of the resulti.g coal fly ash,was fi.st ***,the effecti.eness of alkali.e leachi.g on the recovery abi.i.y of REEs through organi. aci. leachi.g was *** results show that the maxi.um leachi.g effi.i.ncy for Si.and Al,whi.h was obtai.ed at the opti.um alkali.e leachi.g condi.i.ns,namely NaOH concentrati.n of 10 mol/L,reacti.n temperature of 65℃,li.ui./soli.(L/S)rati. of 10 mL/g,and reacti.n ti.e of 90 mi.,i. 28%and 32%,*** di.esti.n reacti.n wi.h NaOH li.i.i.nts also causes coal fly ash to become more porous,maki.g i. advantageous i. the organi. aci.-leachi.g process at the REEs recovery *** uti.i.ati.n of the desi.i.ated resi.ue produced from the di.esti.n process i. aci. leachi.g effecti.ely i.creases the overall REEs recovery from 32.2%to 77.6%.

关键词： Rare earth elements Alkali.e Organi. aci. Coal fly ash

维普期刊数据库

Comparati.e analysi. of jet and underlyi.g event properti.s across vari.us models as a functi.n of charged parti.le multi.li.i.y at 7 TeV

在线全文

学校读者我要写书评

暂无评论

Chi.ese Physi.s C 2024年第9期48卷 118-125页

作者： Maryam Waqar Hai.a i.Alrebdi.Muhammad Waqas K.S.Al-mugren Muhammad Ajaz Department of Physi.s Abdul Wali Khan University MardanMardan 23200Pakistan Department of Physi.s College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia School of Nuclear Sci.nce and Technology University of Chinese Academy of SciencesBeijing 100049China

i. thi. study,a comprehensi.e analysi. of jets and underlyi.g events as a functi.n of charged parti.le multi.li.i.y i. proton-proton(pp)colli.i.ns at a center-of-mass energy of √s=7 TeV i. *** Monte Carlo(MC)event generators,i.cludi.g Pythi.8.308,EPOS 1.99,EPOSLHC,EPOS4_(Hydro),and EPOS4_(noHydro),are employed to predi.t parti.le *** predi.ti.ns from these models are compared wi.h experi.ental data from the CMS *** charged parti.les are categori.ed i.to those associ.ted wi.h underlyi.g events and those li.ked to jets,and the analysi. i. restri.ted to charged parti.les wi.h|η|0.25 GeV/*** compari.g the MC predi.ti.ns wi.h CMS data,we fi.d that EPOS4_(Hydro),EPOSLHC,and Pythi.8 consi.tently reproduce the experi.ental results for all charged parti.les,underlyi.g events,i.trajets,and leadi.g charged *** charged jet rates wi.h p_T^(***)>5 GeV/c,EPOS4_(Hydro)and Pythi.8 perform excepti.nally *** the case of charged jet rates wi.h p_T^(***)→30 GeV/c,EPOSLHC reproduces sati.factori.y good results,whereas EPOS4 Hydro exhi.i.s good agreement wi.h the data at hi.her charged parti.le multi.li.i.i.s compared to the other *** can be attri.uted to the conversi.n of energy i.to flow when"Hydro=on"leadi.g to an i.crease i. *** EPOSLHC model descri.es the data better owi.g to the new collecti.e flow effects,correlated flow treatment,and parameteri.ati.n compared to EPOS ***,the exami.ati.n of the jet p_T spectrum and normali.ed charged p_T densi.y reveals that EPOS4_(Hydro),EPOS4_(noHydro),and EPOSLHC exhi.i. good agreement wi.h the experi.ental results,whereas Pythi.8 and EPOS 1.99 do not perform as well owi.g to the lack of correlated flow treatment.

关键词： Monte Carlo models underlyi.g event jets charged parti.le multi.li.i.y

维普期刊数据库

Si.pli.i.d sei.mi. scenari. analysi. of exi.ti.g masonry bui.di.gs accounti.g for local si.e effects

在线全文

学校读者我要写书评

暂无评论

Fronti.rs of Structural and Ci.i. Engi.eeri.g 2024年第2期18卷 309-318页

作者： Ayşe E.ÖZSOYÖZBAY i.ıl SANRi.KARAPi.AR Zehra N.KUTLU i.mai. E.Ki.i. Department of Ci.i. Engi.eeri.g Maltepe UniversityIstanbul 34857Turkey School of Engi.eeri.g and Constructi.n Oryx Universal CollegeDoha 12253Qatar

Thi. study di.cusses the effects of local si.es and hazard ampli.i.ati.n on the sei.mi. vulnerabi.i.y assessment of exi.ti.g masonry *** thi. context,a rapi. sei.mi. evaluati.n procedure was i.plemented on an old masonry bui.di.g stock i. the hi.tori.al center Galata,located i.i.tanbul,to determi.e the sei.mi. ri.k pri.ri.y of the bui.t *** scenari.s were generated for all soi. classes,di.ferent moment magni.udes,and source-to-si.e di.tances to obtai. more accurate results for the sei.mi. vulnerabi.i.y assessment of the studi.d bui.di.g ***,damage di.tri.uti.ns esti.ated under ni.e di.ferent scenari.s wi.h/wi.hout si.e effects were compared and i.lustrated i. maps to di.cuss changes i. vulnerabi.i.y owi.g to ampli.i.ati.n *** thi. study,by re-exami.i.g the rapi. sei.mi. evaluati.n procedure by i.cludi.g geo-hazard-based assessment,the i.portance of si.e effects on the vulnerabi.i.y and ri.k assessment of bui.t heri.age was *** proposed framework i.tegrati.g fi.ld data and local si.e effects i. beli.ved to advance the current appli.ati.ns for vulnerabi.i.y assessment of masonry bui.di.gs and provi.e an i.provement i. the appli.ati.n of rapi. sei.mi. assessment procedures wi.h more reli.ble results.

关键词： masonry bui.di.gs sei.mi. vulnerabi.i.y assessment cultural heri.age local si.e effect

Underwater i.age Enhancement Usi.g Customi.ed CLAHE and Adapti.e Color Correcti.n

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materi.ls & Conti.ua 2023年第3期74卷 5157-5172页

作者： mousa Alhajlah College of Appli.d Computer Sci.nce King Saud UniversityRiyadhSaudi Arabia

Underwater i.ages degraded due to low contrast and vi.i.i.i.y ***,i. i. i.portant to enhance the i.ages and vi.eos taken i. the underwater envi.onment before *** i. a way to i.prove or i.crease i.age quali.y and to i.prove the contrast of degraded *** ori.i.al i.age or vi.eo whi.h i. captured through i.age processi.g devi.es needs to i.prove as there are vari.us i.sues such as less li.ht avai.able,low resoluti.n,and blurri.ess i. underwater i.ages caused by the normal *** researchers have proposed di.ferent soluti.ns to overcome these *** channel pri.r(DCP)i. one of the most used techni.ues whi.h produced a better Peak Si.nal to Noi.e Rati.(PSNR)***,DCP has some i.sues such as i. tends to darken i.ages,reduce contrast,and produce halo *** proposed method solves these i.sues wi.h the help of contrast-li.i.ed adapti.e hi.togram equali.ati.n(CLAHE)and the Adapti.e Color Correcti.n *** proposed method was assessed usi.g Japan Agency for Mari.e-Earth Sci.nce and Technology(JAMSTEC),and some i.ages were collected from the *** measure of entropy(MOE),Measure of Enhancement(EME),Mean Square Error(MSE),and PSNR opted as performance measures duri.g *** values of MSE and PSNR achi.ved by the proposed framework are 0.26 and 32 respecti.ely whi.h shows better results.

关键词： Enhancement color di.i.i.hi.g contrast fusi.n techni.ue color balanci.g techni.ue CLAHE dark channel pri.r

Hi.hli.hti.g relati.nshi.s between sand thi.knesses,reservoi.-seal pai.s and paleobathymetry from a sequence strati.raphi. perspecti.e:An example from Tortoni.n Serravalli.n deposi.s,onshore Ni.er Delta Basi.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Geosci.nce 2024年第1期5卷 12-23页

作者： i.eanyi.hukwu S.Obi.K.Mosto Onuoha Chi.ozi. i.Pri.ceton Di. Mobi. Produci.g Ni.eri. UnlimitedLagosNigeria Department of Geology University of NigeriaNsukkaEnugu StateNigeria

The uti.i.ati.n of sequence strati.raphi. concepts i. i.enti.yi.g sands and thei. spati.l conti.ui.y i. di.ti.ct gross deposi.i.nal setti.gs i. key,especi.lly i. fronti.r setti.gs where data pauci.y i. a common *** the Baka fi.ld,onshore Ni.er Delta,detai.ed reservoi. correlati.n gui.ed by sequence strati.raphi. framework analysi. showed the di.tri.uti.n of sand and shale uni.s consti.uti.g reservoi.seal pai.s(RSP)correlatable across the *** the 3rd-order packages,i. i. observed that the lowstand systems tract(LST)and hi.hstand systems tract(HST)contai. more RSPs and thi.ker 4th-and 5th-order sands than the transgressi.e systems tract(TST).i. terms of bathymetry,i. i. noted that i.respecti.e of systems tracts,the RSP i.dex(Ri.decreases from the proxi.al shallow/i.ner shelf setti.gs to the more di.tal outer shelf *** all three systems tracts,i.tervals i.terpreted as lowstand progradi.g complexes contai. the best developed sands and hi.hest *** development wi.hi. the LSTs has been controlled by a pronounced growth fault regi.e accompani.d by hi.h subsi.ence and sedi.entati.n *** i. li.ked to the basi.ward mi.rati.n of the sands duri.g prolonged sea-level fall,creati.g si.ni.i.ant accommodati.n space for sand *** the other hand,the TSTs known to mark peri.ds of progressi.e sea-level ri.e and landward mi.rati.n of sandy faci.s,show thi.ner sands enclosed i. much thi.ker,laterally extensi.e,and better-preserved deeper mari.e *** sei.mi. secti.ns i.di.ate i.tense growth faulti.g and channeli.ati.n that i.fluenced the syn-and postdeposi.i.nal development of the sand packages across the *** i.i.i.l ti.i.g of deformati.n of subregi.nal faults i. thi. area coi.ci.es wi.h peri.ds of abrupt falls i. sea *** approach could be useful for predi.ti.g sand-prone areas i. fronti.r fi.lds as well as possi.le reservoi.-seal parameters requi.ed for some aspects of petroleum system analysi. and qui.k-look volum

关键词： Reservoi.-seal pai.s(RSP) Systems tract Coastal swamp depobelt Bathymetry Sequence strati.raphy Ni.er Delta Basi.