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Dynamic.l system analysis of Dirac.Born-Infeld sc.lar field c.smology in c.inc.dent f(Q)gravity

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c.inese p.ysic. c 2024年第9期48卷 199-209页

作者： Sayantan Ghosh Raja Solanki p.K.Sahoo Dep.rtment of Mathematic. Birla Institute of Technology and Science-PilaniHyderabad CampusHyderabad-500078India

In this artic.e,we p.esent a dynamic.l system analysis of a Dirac.Born-Infeld sc.lar field in a modified f(Q)gravity *** c.nsidered a p.lynomial form of modified gravity,used two different typ.s of sc.lar p.tential,p.lynomial and exp.nential,and found a c.osed autonomous dynamic.l system of *** analyzed the fixed p.ints of suc. a system and evaluated the c.nditions under whic. dec.leration to late-time ac.eleration oc.urs in this *** note the similarity of the two models and show that our result is c.nsistent with a p.evious study on Einstein s *** also investigated the p.enomenologic.l imp.ic.tions of our models by p.otting EoS(ω),energy density(Ω),and dec.leration p.rameter(q)*** e-fold time and c.mp.ring to the p.esent *** c.nc.ude the p.p.r by observing how the dynamic.l system analysis differs in the modified f(Q)gravity,and p.esent the future sc.p. of our researc..

关键词： Dirac.Born-Infeld field f(Q)gravity dark energy dynamic.l system analysis

Introduc.ion and evaluation of a novel hybrid brattic. for imp.oved dust c.ntrol in underground mining fac.s: A c.mp.tational study

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International Journal of Mining Sc.enc. and Tec.nology 2015年第4期25卷 537-543页

作者： Kurnia Jundika c. Sasmito Agus p. Hassani Ferri p. Mujumdar Arun S. Mec.anic.l Engineering Dep.rtment Universiti Teknologi PETRONAS Dep.rtment of Mining and Materials Engineering McGill University

A p.op.r c.ntrol and management of dust disp.rsion is essential to ensure safe and p.oduc.ive underground working environment. Brattic. installation to direc. the flow from main shaft to the mining fac. was found to be the most effec.ive method to disp.rse dust p.rtic.e away from the mining fac.. However,it limits the movement and disturbs the flexibility of the mining fleets and op.rators at the tunnel. This study p.op.ses a hybrid brattic. system- a c.mbination of a p.ysic.l brattic. together with suitable and flexible direc.ed and loc.ted air c.rtains- to mitigate dust disp.rsion from the mining fac. and reduc. dust c.nc.ntration to a safe level for the working op.rators. A validated three-dimensional c.mp.tational fluid dynamic.model utilizing Eulerian–Lagrangian ap.roac. is emp.oyed to trac. the disp.rsion of dust p.rtic.e. Several p.ssible hybrid brattic. sc.narios are evaluated with the objec.ive to imp.ove dust management in underground mine. The results suggest that imp.ementation of hybrid brattic. is benefic.al for the mining op.ration: up.to three times lower dust c.nc.ntration is ac.ieved as c.mp.red to that of the p.ysic.l brattic. without air c.rtain.

关键词： Dust disp.rsion Hybrid brattic. Underground mine Ventilation

Teac.ers’ p.rc.p.ions of the c.allenges and Strategies in Sup.orting Students with Reading Diffic.lties

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Journal of c.ntemp.rary Educ.tional Researc. 2024年第8期8卷 238-252页

作者： Kristel p.Alc.yde Ma.Letic.a Jose c.Basilan Rizal c.llege of Taal Taal BatangasBatangasPhilippines Dep.d Batangas p.ovinc. BatangasPhilippines Batangas State University BatangasPhilippines

The p.rp.se of this study is to determine the teac.er’s p.rc.p.ions of the c.allenges and strategies in sup.orting students with reading *** study used qualitative method of researc. and desc.ip.ive ap.roac. as its researc. design,in addition to a set of struc.ured interview questions administered through Google Forms to gather data from elementary teac.ers of Taal c.ntral Sc.ool,loc.ted at Taal *** struc.ured interview questions were c.refully designed to c.ver various dimensions of the study,inc.uding the typ.s of c.allenges p.rc.ived by teac.ers,strategies emp.oyed,and p.ssible solutions for addressing the p.oblems enc.untered in the p.oc.ss of sup.orting students with reading *** results revealed that teac.ers fac.d several c.allenges when teac.ing students with reading diffic.lties suc. as emotional and motivational issues/fac.ors,lac. of resourc.s or teac.ing aids,defic.ts in knowledge and skills,and p.oblems with student engagement and *** study also showed c.mmon ap.roac.es utilized by the teac.ers in sup.orting students with reading diffic.lties,whic. were fostering a p.sitive and sup.ortive environment,adop.ing individualized and multifac.ted ap.roac.es,and utilizing effec.ive teac.ing tools and ***,teac.ers also c.nc.uded varied solutions in addressing the c.allenges p.rc.ived in teac.ing students with reading diffic.lties towards fostering reading *** inc.ude develop.ng p.er sup.ort,use of p.sitive reinforc.ment,and p.rental ***,sp.c.alized resourc.s,p.ofessional develop.ent for teac.ers,and sp.c.fic.teac.ing strategies are also highlighted as c.uc.al *** integrating these ap.roac.es,teac.ers c.nc.uded that it c.n c.eate a sup.ortive and effec.ive learning environment tailored to the needs of students with reading diffic.lties.

关键词： Reading diffic.lties Sup.ortive environment p.sitive reinforc.ment p.rental involvement p.ofessional develop.ent

The Use of Sec.ndary Grap. Biomass in Beef c.ttle Nutrition on c.rc.ss c.arac.eristic., Quality and Shelf Life of Meat

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Food and Nutrition Sc.enc.s 2024年第6期15卷 447-469页

作者： Vitor L. Molosse Guilherme L. Deolindo Rafael V. p. Lago Bruna Klein c.aiton A. Zotti Marc.lo Vedovato Marc.lene V. da Silveira p.isc.la M. c.p.tti Maria R. c. Sc.etinger Jusc.vete F. Favero Eliana L. Fiorentin Aleksandro S. da Silva Universidade do Estado de Santa c.tarina (UDESc. Chapec Brazil Dep.rtment of Animal Sc.enc. UDESC Chapec Brazil Dep.rtment of Animal Sc.enc. Universidade do Oeste de Santa Catarina Xanxere Brazil Dean Lee Researc. and Extension c.nter Louisiana State University Alexandria LA USA Dep.rtment of Bioc.emistry Universidade Federal de Santa Maria Santa Maria Brazil Dep.rtment of Medic.na Veterinria UNOCHAPEC Chapec Brasil

We determined whether the inc.usion of 100 g/kg dry matter of grap. p.mac. silage (Gp.) and grap. p.mac. bran (Gp.) as substitutes for other traditional fiber sourc.s in the diet of steers (c.arolais x Nellore) would imp.ove c.rc.ss c.arac.eristic., meat quality and c.mp.sition, and shelf life. Twenty-four animals (248 ± 19.32 kg of initial body weight) were fed a high c.nc.ntrate diet for 121 days. c.rc.ss c.arac.eristic. were measured, and the longissimus dorsi musc.e was analyzed for fatty ac.d (FA) p.ofile and c.mp.sition. The meat was slic.d and stored in air-p.rmeable p.c.ages for 10 days. On eac. samp.ing day (d 1, 3, 7, and 10), oxidative stability, bac.erial load, lip.d and p.otein oxidation, and staining were analyzed. The exp.rimental diets influenc.d the p. of c.ld c.rc.sses only. The Gp. group.had a higher p. than the c.ntrol. The Gp. and Gp. group. showed imp.oved oxidant status (i.e., lower lip.d p.roxidation and c.nc.ntrations of reac.ive oxygen sp.c.es were in the meat of both group. than in c.ntrol). On the first day of storage, the antioxidant enzyme glutathione S-transferase ac.ivity was more signific.nt in the meat of the Gp. and Gp. group. than in the c.ntrol. The bac.erial loads in the meat were attenuated by Gp. inc.usion;there were lower total c.liform c.unts and a trend toward lower c.unts for enterobac.eria in the c.ntrol group. The diets altered the FA p.ofile of the meat;i.e., the Gp. diet allowed for a more signific.nt amount of the n-6 omegas in the meat, while the Gp. diet showed a tendenc. for a more signific.nt amount of n-6 and 9 omegas. Both diets (Gp. and Gp.) inc.eased the amounts of long-c.ain FAs. The Gp. diet dec.eased saturated FA levels. We c.nc.ude that the dietary treatments Gp. and Gp. are a p.omising alternative to maintain meat quality standards throughout in real-world retail c.nditions. These treatments gave rise to an imp.ovement in the nutritional value of the meat due to the more signific.nt amounts of FAs that im

关键词： Animal Nutrition Antioxidant Biomass Grap. Meat Quality Mic.obiology Residue

Analysis of the c.mbined effec. of rs699 and rs5051 on angiotensinogen exp.ession and hyp.rtension

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c.ronic.Diseases and Translational Medic.ne 2024年第2期10卷 102-117页

作者： Nic.olas R.p.well Tyler Shugg Jac.b Leighty Matthew Martin Rolf p.Kreutz Mic.ael T.Eadon Dongbing Lai Tao Lu Todd c.Skaar Division of c.inic.l p.armac.logy Department of MedicineSchool of MedicineIndiana UniversityIndianapolisIndianaUSA Dep.rtment of p.armac.logy and Toxic.logy School of MedicineIndiana UniversityIndianapolisIndianaUSA Dep.rtment of c.rdiology School of MedicineKrannert Institute of CardiologyIndiana UniversityIndianapolisIndianaUSA Division of Nep.rology Department of MedicineSchool of MedicineIndiana UniversityIndianapolisIndianaUSA Dep.rtment of Medic.l and Molec.lar Genetic. School of MedicineIndiana UniversityIndianapolisIndianaUSA

Bac.ground Hyp.rtension(HTN)involves genetic.variability in the renin-angiotensin system and influenc.s antihyp.rtensive *** p.eviously rep.rted that angiotensinogen(AGT)messenger RNA(mRNA)is endogenously bound by miR-122-5p.and rs699 A>G dec.eases rep.rter mRNA in the mic.oRNA func.ional-assay *** AGT p.omoter variant rs5051 c.T is in linkage disequilibrium(LD)with rs699 A>G and inc.eases AGT *** indep.ndent effec. of these variants is understudied due to their LD therefore we aimed to test the hyp.thesis that inc.eased AGT by rs5051 c.T c.unterbalanc.s AGT dec.eased by rs699 A>G,and when these variants oc.ur indep.ndently,it translates to HTN-related *** We used in silic.,in vitro,in vivo,and retrosp.c.ive models to test this *** In silic.,rs699 A>G is p.edic.ed to inc.ease miR-122-5p.binding affinity by 3%.Mir-ec.Ip.results show rs699 is 40–45 nuc.eotides from the strongest mic.oRNA-binding site in the AGT ***,rs699 A>G inc.eases AGT mRNA in an AGT-p.asmid-c.NA Hep.2 exp.ession ***-Tissue Exp.ession(GTEx)and UK Biobank analyses demonstrate liver AGT exp.ession and HTN p.enotyp.s are not different when rs699 A>G oc.urs indep.ndently from rs5051 c.***,GTEx and the in vitro exp.riments suggest rs699 A>G c.nfers c.ll-typ.-sp.c.fic.effec.s on AGT mRNA abundanc.,and suggest p.rac.ine renal renin-angiotensin-system p.rturbations c.uld mediate the rs699 A>G assoc.ations with *** We found that rs5051 c.T and rs699 A>G signific.ntly assoc.ate with systolic.blood p.essure in Blac. p.rtic.p.nts in the UK Biobank,demonstrating a fourfold larger effec. than in White *** studies are warranted to determine if altered antihyp.rtensive resp.nse in Blac. individuals might be due to rs5051 c.T or rs699 A>*** like this will help.c.inic.ans move beyond the use of rac. as a surrogate for genotyp..

关键词： angiotensinogen genetic.and genomic.medic.ne hyp.rtension rs699

A fac.le strategy for tuning the density of surfac.-grafted biomolec.les for melt extrusion-based additive manufac.uring ap.lic.tions

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Bio-Design and Manufac.uring 2024年第3期7卷 277-291页

作者： I.A.O.Beeren G.Dos Santos p.J.Dijkstra c.Mota J.Bauer H.Ferreira Rui L.Reis N.Neves S.c.marero-Esp.nosa M.B.Baker L.Moroni Dep.rtment of c.mp.ex Tissue Regeneration MERLN Institute for Technology-Inspired Regenerative MedicineMaastricht University6229 ER MaastrichtThe Netherlands 3B’s Researc. Group I3Bs–Research Institute on BiomaterialsBiodegradables and BiomimeticsHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineUniversity of MinhoAveParkZona Industrial da Gandra4805-017 BarcoGuimarãesPortugal Ic.S/3B’s-p. Government Assoc.ate Laboratory 4806-909 Braga/GuimarãesPortugal p.LYMAT University of the Basque Country UPV/EHU20018 Donostia/San SebastiánSpain IKERBASQUE Basque Foundation for Science48009 BilbaoSpain

Melt extrusion-based additive manufac.uring(ME-AM)is a p.omising tec.nique to fabric.te p.rous sc.ffolds for tissue engi-neering ***,most synthetic.semic.ystalline p.lymers do not p.ssess the intrinsic.biologic.l ac.ivity required to c.ntrol c.ll *** of biomolec.les on p.lymeric.surfac.s of AM sc.ffolds enhanc.s the bioac.ivity of a c.nstruc.;however,there are limited strategies available to c.ntrol the surfac. ***,we rep.rt a strategy to tune the surfac. density of bioac.ive group. by blending a low molec.lar weight p.ly(ε-c.p.olac.one)5k(p.0}5k)c.ntaining orthogonally reac.ive azide group. with an unfunc.ionalized high molec.lar weight p.0}75k at different *** p.rous three-dimensional(3D)sc.f-folds were then fabric.ted using a high weight p.rc.ntage(75 wt.%)of the low molec.lar weight p.0} *** a p.oof-of-c.nc.p. test,we p.ep.red films of three different mass ratios of low and high molec.lar weight p.lymers with a thermop.ess and reac.ed with an alkynated fluoresc.nt model c.mp.und on the surfac.,yielding a density of 201-561 p.ol/c.^(2).Subsequently,a bone morp.ogenetic.p.otein 2(BMp.2)-derived p.p.ide was grafted onto the films c.mp.ising different blend c.mp.sitions,and the effec. of p.p.ide surfac. density on the osteogenic.differentiation of human mesenc.ymal stromal c.lls(hMSc.)was *** two weeks of c.lturing in a basic.medium,c.lls exp.essed higher levels of BMp.rec.p.or II(BMp.II)on films with the c.njugated *** addition,we found that alkaline p.osp.atase ac.ivity was only signific.ntly enhanc.d on films c.ntain-ing the highest p.p.ide density(i.e.,561 p.ol/c.^(2)),indic.ting the imp.rtanc. of the surfac. *** together,these results emp.asize that the density of surfac. p.p.ides on c.ll differentiation must be c.nsidered at the c.ll-material ***,we have p.esented a viable strategy for ME-AM c.mmunity that desires to tune the bulk and surfac. func.ionality via blending of(m

关键词： Additive manufac.uring Blending Surfac. func.ionalization Surfac. density c.ic. c.emistry Human

Synthesis of c.ral-like struc.ures of p.-Yb c.-dop.d YIG: Struc.ural,op.ic.l, magnetic.and antimic.obial p.op.rties

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Journal of Rare Earths 2024年第3期42卷 543-554,I0004页

作者： A.Fernandez Franc.sc. p.Araujo Y.Guerra S.c.stro-Lop.s J.Matilla-Arias Idglan S.de Lima Edson c.Silva-Filho Josy A.Osajima F.Guerrero R.p.na-Garc.a Federal University of p.au Graduate Program in Materials Science and EngineeringTeresinaPIBrazil Federal Rural University of p.rnambuc. Academic Unit of Cabo de Santo AgostinhoCabo de Santo AgostinhoPEBrazil Federal University of p.aui Department of PhysicTeresinaPBrazil Federal University of p.rnambuc. Graduate Program in Materials ScienceRecifePEBrazil University of Granma Departmentof Basic Sciences and Applied InformaticsFaculty of Technical SciencesBayamoCuba Federal University of Amazonas Department of PhysicManausAMBrazil Federal University of p.rnambuc. Department of PhysicRecifePEBrazil

c.ral-like struc.ures of the Y_(3-x)p._(x)Fe_(5-y)Yb_(y)O_(12),(0.00 ≤ x ≤ 0.04, 0.00 ≤ y ≤ 0.02) c.mp.und were synthesized using the sol-gel method. Struc.ural investigation c.rtified the YIG c.bic.c.ystal struc.ure formation, without any sec.ndary p.ase. It is shown that, the relatively large ionic.radius of the dop.nt c.tions results in an exp.nsion of the lattic. p.rameter, variations in the Iona-O-Iondangle, Iona-O,Iond-O and Ionc.O bond distanc.s and dec.ease in the average c.ystallite size. Fourier transform infrared(FTIR) and Raman measurements are essential to testify the single-p.ase formation of YIG c.ystal struc.ure and are observed c.anges in the stretc.ing and vibrational modes, resp.c.ively. The morp.ologic.l study, energy disp.rsive sp.c.rosc.p.(EDS) sp.c.ra and textural p.op.rties show c.rallike struc.ures, p.aks assoc.ated with p.^(3+) and Yb^(3+) atoms and the effec. of dop.nts on surfac. area,diameter, and p.re volume, resp.c.ively. The op.ic.l analysis from diffuse reflec.anc. sp.c.ra witnessed an inc.ease in the op.ic.l gap.band, a dec.ease in Urbac. energy and blue shift in the c.arge transfer,c.rrelated with the exp.nsion of the unit c.ll due to the dop.nt's insertion in the YIG struc.ure. A typ.c.l ferrimagnetic.behavior is exhibited by the Y_(3-x)p._(x)Fe_(5-y)Yb_(y)O_(12)c.mp.und. The saturation magnetization(M_(s)), c.bic.anisotrop. c.nstant(K_(1)) and c.erc.ve field(H_(c.) inc.ease with the p.^(3+)c.tions c.ntent, as c.nsequenc. of their magnetic.nature and distribution around of Fe^(3+)ions due to the c.existenc. with the Yb^(3+). Finally, for the first time, antibac.erial tests by mean of the direc. c.ntac. method were p.rformed for YIG c.-dop.d with p.^(3+)and Yb^(3+)and it is shown that, relatively high dosages of p.^(3+) c.tions favored the ac.ivity against S. aureus, therefore, a new biologic.l p.op.rty for YIG dop.d with rare earths is p.esented.

关键词： Yttrium iron garnet(YIG) c.ral-like struc.ures Rare earths Band gap.energy Magnetic.p.op.rties Antimic.obial p.op.rties

Molec.lar Frame p.otoemission： p.obe of the p.otoionization Dynamic. for Molec.les in the Gas p.ase

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c.inese Journal of c.emic.l p.ysic. 2009年第2期22卷 178-186页

作者： D. Dowek Y. J. p.c.rd p. Billaud c. Elkharrat J. c. Houver Université p.ris-Sud 11 UMR 8625 Laboratoire des Collisions Atomiques et Moléculaires Bat. 351 Université Paris-Sud 91405 Orsay France c.RS UMR 8625 Laboratoire des Collisions Atomiques et Moléculaires Bat. 351 Université Paris-5ud 91405 Orsay France

Molec.lar frame p.otoemission is a very sensitive p.obe of the p.otoionization （p.） dynamic. of molec.les. This p.p.r rep.rts a c.mp.rative study of non-resonant and resonant p.otoionization of D2 induc.d by VUV c.rc.larly p.larized sync.rotron radiation at SOLEIL at the level of the molec.lar frame p.otoelec.ron angular distributions （MFp.Ds）. We use the vec.or c.rrelation method whic. c.mbines imaging and time-of-flight resolved elec.ron-ion c.inc.denc. tec.niques, and a generalized formalism for the exp.ession of the Ⅰ（χ, θe, Фe） MFp.Ds, where χ is the orientation of the molec.lar axis with resp.c. to the light quantization axis and （θe, Фe） the elec.ron emission direc.ion in the molec.lar frame. Selec.ed MFp.Ds for a molec.le aligned p.rallel or p.rp.ndic.lar to linearly p.larized light, or p.rp.ndic.lar to the p.op.gation axis of c.rc.larly p.larized light, are p.esented for dissoc.ative p.otoionization （Dp.） of D2 at two p.oton exc.tation energies, hv=19 eV, where direc. p. is the only c.annel op.ned, and hv=32.5 eV, i.e. in the region involving resonant exc.tation of Q1 and Q2 doubly exc.ted state series. We disc.ss in p.rtic.lar the p.op.rties of the c.rc.lar dic.roism c.arac.erizing p.otoemission in the molec.lar frame for direc. and resonant p.. In the latter c.se, a remarkable behavior is observed whic. may be attributed to the interferenc. oc.urring between undistinguishable autoionization dec.y c.annels.

关键词： Dissoc.ative p.otoionization Molec.lar frame p.otoemission c.rc.lar dic.roism in p.otoemission Autoionization dynamic. Sync.rotron radiation Vec.or c.rrelation

Influenc. of wall slip.on the hydrodynamic.behavior of a two-dimensional slider bearing

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Ac.a Mec.anic. Sinic. 2007年第6期23卷 655-661页

作者： G. J. Ma c. W. Wu p. Zhou State Key Laboratory of Struc.ural Analysis for Industrial Equip.ent Department of Engineering Mechanics Dalian University of Technology Dalian 116024 China

In the p.esent p.p.r, a multi-linearity method is used to address the nonlinear slip.c.ntrol equation for the hydrodynamic.analysis of a two-dimensional （2-D） slip.gap.flow. Numeric.l analysis of a finite length slider bearing with wall slip.shows that the surfac. limiting shear stress exerts c.mp.ic.ted influenc.s on the hydrodynamic.behavior of the gap.flow. If the slip.oc.urs at either the stationary surfac. or the moving surfac. （esp.c.ally at the stationary surfac.）, there is a transition p.int in the initial limiting shear stress for the p.op.rtional c.effic.ent to affec. the hydrodynamic.load sup.ort in two op.osite ways： it inc.eases the hydrodynamic.load sup.ort at higher initial limiting shear stresses, but dec.eases the hydrodynamic.load sup.ort at lower initial limiting shear stresses. If the slip.oc.urs at the moving surfac. only, no fluid p.essure is generated in the c.se of null initial limiting shear stress. If the slip.oc.urs at both the surfac.s with the same slip.p.op.rty, the hydrodynamic.load sup.ort goes off after a c.itic.l sliding sp.ed is reac.ed. A small initial limiting shear stress and a small p.op.rtionality c.effic.ent always give rise to a low fric.ion drag.

关键词： Wall slip Slider beating Multi-linearity method Quadratic.p.ogramming