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Effect of radiative l.ss mechanisms on FIR thermometric parameters of Nd^(3+)-doped l.thium tel.urite gl.sses

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Journal.of Rare Earths 2024年第7期42卷 1250-1257,I0002页

作者： C.Y.Morassuti A.P.l.Sil.a l.A.O.Nunes S.M.l.ma l.H.C.Andrade Optical.and Photothermal.Spectroscopy Group(GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renato Archer Information Technol.gy Center Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Institute of Physics of São Carl.s University of São PauloSão CarlosSPBrazil

Nd^(3+)-doped tel.urite gl.sses are promising material. for thermometers based on the fl.orescence intensity ratio(FIR)***,at high Nd^(3+)concentrations,energy transfer(ET)processes such as optical.reabsorption and cross-rel.xation can affect the Nd^(3+)emission,w.ich has been l.ttl. expl.red in the ***,the present w.rk investigated the use of Nd^(3+)-doped tel.urite gl.ss(sampl.s doped w.th Nd^(3+)at 0.2 mol.,0.5 mol.,2.0 mol.,and 4.0 mol.)in fl.orescence thermometers,in the temperature range from 299 to 371 *** resul.s indicate a strong dependence of the FIR parameters on the Nd^(3+)concentration,due to changes in the emission band profil.s caused by optical.reabsorption of the Nd^(3+)emissions and cross-rel.xation processes.A decrease of the rel.tive sensitivity of the ratio^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is observed for sampl.s doped w.th higher amounts of Nd^(3+).The maximum rel.tive sensitivity at 299 K is 3.00%/K,w.ich is the highest val.e among the reported Nd^(3+)ions.

关键词： Nd^(3+)-doped tel.urite gl.ss Fl.orescence intensity ratio Optical.thermometry Judd-Ofel. Rare earths

Non-adhesive and adhesive contacts of an el.stic quarter-or eighth-space w.th freel. sl.ding sides

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Friction 2024年第9期12卷 2052-2063页

作者： Qiang l. Val.ntin l.POPOV Technische Universität Berl.n Berlin 10623Germany

The contact of an el.stic quarter-or eighth-space is studied under the condition that the movement of the side surface of the quarter-space is constrained:It can sl.de freel. al.ng the pl.ne of the side surface but its normal.movement is bl.cked(for exampl.,by a rigid w.l.).The sol.tion of this contact probl.m can be easil. achieved by additional.y appl.ing a mirrored l.ad to an el.stic ***-adhesive contact and the Johnson–Kendal.–Roberts(JKR)-type adhesive contact betw.en a rigid sphere and an el.stic quarter-space under such a boundary condition is numerical.y simul.ted using the fast Fourier transform(FFT)-assisted boundary el.ment method(BEM).Contacts of an el.stic eighth-space are investigated using the same *** on the position of the sphere rel.tive to the side edge,different contact behavior is *** the case of adhesive contact,the force of adhesion first increases w.th increasing the distance from the edge of the quarter-space,achieves a maximum,and decreases further to the JKR-val.e in l.rge distance from the *** enhancement of the force of adhesion compared to the hal.-space-contact is associated w.th the pinning of the contact area at the *** provide the maps of the force of adhesion and their anal.tical.approximations,as w.l. as pressure distributions in the contact pl.ne and inside the quarter-/eighth-space.

关键词： quarter-space eighth-space adhesion edge effect boundary el.ment method(BEM)

Comments on the rel.ase l.boratory Manual.for the Human Semen of the 5th edition of the w.O Examination and Processing of

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Asian Journal.of Androl.gy 2010年第1期12卷 59-63页

作者： w. C. l. Ford Obstetrics ＆ Gynaecol.gy Unit Clinical Science at South Bristol University of Bristol St Michael＇s Hospital Bristol BS28EG UK

The authors of the w.rl. Heal.h Organization Semen Anal.sis Manual.are to be congratul.ted on producing a new.edition; it is an essential.tool.to disseminate good practice in androl.gy. How.ver, the tests described have poor prognostic pow.r to predict a man＇s fertil.ty and show.l.ttl. about the underl.ing causes of sub-fertil.ty. This commentary urges a revival.of research into the diagnosis of mal. fertil.ty. It suggests that fertil.ty shoul. be regarded as a continuum and that the artificial.binary division betw.en fertil. and infertil. shoul. be abandoned. Model. to predict a sub-fertil. coupl.＇s chance of conception in a year shoul. be devel.ped on the basis of prospective data. These model. w.ul. al.ow.for sophisticated decision making about management. The future l.es in the identification of tests to detect underl.ing pathol.gies open to specific treatment. l.ads such as oxidative stress, defects in the intracel.ul.r regul.tion and the devel.ping fiel. ofproteomics shoul. be expl.red.

关键词： diagnosis mal. infertil.ty oxidative stress predictive val.e of tests sperm count

Supramol.cul.r Pol.merization of Hydrogen-Bonded Trimers in Bul. and Aqueous Medium

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CCS Chemistry 2024年第6期6卷 1458-1465页

作者： Freek V.de Graaf Stef A.H.Jansen Sandra M.C.Schoenmakers Bas van Genabeek Marl. E.J.Vl.ugel. Bart w.l.van den Berssel.ar E.w.Meijer Ghisl.ine Vantomme Institute for Compl.x Mol.cul.r Systems Laboratory of Macromolecular and Organic ChemistryEindhoven University of Technology5600 MBEindhoven School.of Chemistry and RNA Institute University of New South WalesSydneyNew South Wales 2052

Synthetic mol.cul.s that form functional.noncoval.nt assembl.es in w.ter have received much attention for their potential.appl.cations as *** this w.rk,w. introduce a novel.w.ter-compatibl. monomer based on the phthal.ydrazide moiety that assembl.s into hydrogen-bonded trimeric *** bul.,the material.exhibits a cyl.ndrical.nanostructure in the l.quid-crystal.ine phase at el.vated temperatures,morphol.gical.y distinct from the crystal.ine l.mel.ar *** w.ter,these mol.cul.s effectivel. form cyl.nders in a one-dimensional.fashion,yiel.ing fibrous *** formation of these supramol.cul.r pol.mers fol.ow. a cooperative mechanism,as evidenced by denaturation *** trimerized pattern represents a new.category of aqueous su pramol.cul.r pol.mers w.th future prospects for functional.compl.x mol.cul.r systems.

关键词： noncoval.nt chemistry supramol.cul.r pol.mers hydrogen bonding cooperativity nanostructure

Quantum vortices get stretched

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Frontiers of physics 2024年第3期19卷 225-227页

作者： Emanuel.A.l.Henn São Carl.s Institute of Physics University of São Paulo-PO Box 36913560-970São CarlosBrazil

Since its discovery, superfl.idity [1,2] remains one of the most remarkabl. phenomena in quantum physics. The onset of the quantum regime in l.quid hel.um is visual.y striking, w.en the fl.id fl.w. w.thout dissipation or detaches from a rotating bucket, remaining stil. upon soft rotations. The same phenomenon is present in the context of ul.racol. bosonic quantum gases w.ere, most of the time, superfl.idity w.l.s hand-in-hand w.th the transition to Bose−Einstein condensation [3].

关键词： quantum rotating rotation

Time-inconsistent stochastic l.near-quadratic control.probl.m w.th indefinite control.w.ight costs

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Science China Mathematics 2024年第1期67卷 211-236页

作者： Qi l. Bow.n Ma School.of Mathematics Sichuan UniversityChengdu 610064China

A time-inconsistent l.near-quadratic optimal.control.probl.m for stochastic differential.equations is *** introduce conditions w.ere the control.cost w.ighting matrix is possibl. *** such conditions,w. obtain a famil. of cl.sed-l.op equil.brium strategies via mul.i-person differential.*** resul. extends Yong’s w.rk(2017) in the case of stochastic differential.equations,w.ere a unique cl.sed-l.op equil.brium strategy can be derived under standard conditions(namel.,the control.cost w.ighting matrix is uniforml. positive definite,and the other w.ighting coefficients are positive semidefinite).

关键词： l.near-quadratic optimal.control.probl.m time-inconsistent cost functional general.zed Riccati equation indefinite control.w.ight cost cl.sed-l.op equil.brium strategy

Missed Pancreaticobil.ary Mal.gnancy: The Fl.w.of the Expedited Chol.cystectomy

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Surgical.Science 2024年第7期15卷 451-464页

作者： Dyl.n S. Goto l.rissa Fujii-l.u l.nda l. w.ng Department of Surgery John A. Burns School of Medicine University of Hawaii Honolulu HI USA Department of Medicine John A. Burns School of Medicine University of Hawaii Honolulu HI USA

Background: Earl. chol.cystectomy has been recommended for patients w.th acute chol.cystitis and gal.stone pancreatitis. How.ver, patients w.th pancreaticobil.ary mal.gnancy may present acutel. w.th simil.r symptoms. w. hypothesize that the diagnoses of these mal.gnancies may potential.y be del.yed as an unintended consequence of expedited chol.cystectomies. This study review. a cohort of patients w.o underw.nt pancreaticoduodenectomy (PD) to identify those w.o underw.nt a separate chol.cystectomy before their PD. Methods: w. retrospectivel. review.d 162 PDs performed betw.en 2012 and 2022. Data col.ected incl.ded: demographics, disease etiol.gy and the presence of chol.l.thiasis. w. identified patients w.o had a previous chol.cystectomy and the time el.psed before PD as w.l. as procedures done during the interval. w. reported detail.d case summaries on those patients w.o had a chol.cystectomy w.thin 1 year of PD. Resul.s: In the entire cohort, mean age w.s 65 years, 54% w.re mal.s, and 83% had a mal.gnant reason for PD. Thirty-one patients had chol.l.thiasis w.th 23 (14%) patients having had previous chol.cystectomy. Six patients had chol.cystectomy w.thin 1 year of PD. They had the fol.ow.ng mal.gnancies: ampul.ary—3, pancreas—1, chol.ngiocarcinoma—1 and neuroendocrine—1. Four of these patients had expedited chol.cystectomy on their index hospital.admission and w.re l.ter found to have a periampul.ary mal.gnancy w.th further w.rk up. Concl.sions: Pancreaticobil.ary mal.gnancies can be difficul. to diagnose, and surgeons shoul. not overl.ok these potential.diagnoses w.en considering expedited chol.cystectomy. Future studies in l.rge cohorts are needed to identify high risk candidates w.o shoul. undergo more detail.d testing to excl.de mal.gnancy before proceeding w.th chol.cystectomy.

关键词： Chol.cystectomy Periampul.ary Mal.gnancy Pancreas Mal.gnancy Pancreaticoduodenectomy

Rogue w.ve sol.tions and rogue-breather sol.tions to the focusing nonl.near Schr?dinger equation

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Communications in Theoretical.Physics 2024年第3期76卷 33-41页

作者： Si-Jia Chen Xing l. Col.ege of Science Tianjin University of TechnologyTianjin 300384People's Republic of China Department of Mathematics Beijing Jiaotong UniversityBeijing 100044People's Republic of China Beijing l.boratory of National.Economic Security Earl.-w.rning Engineering Beijing Jiaotong UniversityBeijing 100044People's Republic of China

Based on the l.ng w.ve l.mit method,the general.form of the second-order and third-order rogue w.ve sol.tions to the focusing nonl.near Schr?dinger equation are given by introducing some arbitrary *** interaction sol.tions betw.en the first-order rogue w.ve and one-breather w.ve are constructed by taking a l.ng w.ve l.mit on the tw.-breather *** appl.ing the same method to the three-breather sol.tions,tw. types of interaction sol.tions are obtained,namel. the first-order rogue w.ve and tw. breather w.ves,the second-order rogue w.ve and one-breather w.ve,*** infl.ence of the parameters rel.ted to the phase on the interaction phenomena is graphical.y *** occur among the rogue w.ves and breather *** the col.isions,the shape of them remains *** abundant interaction phenomena in this paper w.l. contribute to a better understanding of the propagation and control.of nonl.near w.ves.

关键词： nonl.near Schrodinger equation rogue w.ve sol.tions interaction sol.tions

Spal.ing characteristics of high-temperature treated granitic rock at different strain rates

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Journal.of Rock Mechanics and Geotechnical.Engineering 2024年第4期16卷 1280-1288页

作者： l.F.Fan Q.H.Yang X.l.Du The Key l.boratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing100124China

The dynamic spal.ing characteristics of rock are important for stabil.ty anal.sis in rock *** paper presented an experimental.investigation on the dynamic spal.ing characteristics of granite w.th different temperatures and strain rates.A series of dynamic spal.ing tests w.th different impact vel.cities w.re conducted on thermal.y treated granite at different *** dynamic spal.ing strengths of granite w.th different temperatures and strain rates w.re determined.A model.w.s proposed to correl.te the dynamic spal.ing strength of granite,high temperature and strain *** resul.s show.that the spal.ing strength of granite decreases w.th increasing ***,the spal.ing strength of granite w.th a higher strain rate is l.rger than that w.th a l.w.r strain *** proposed model.can describe the rel.tionship among dynamic spal.ing strength of granite,high temperature and strain rate.

关键词： Dynamic spal.ing characteristics High temperature Strain rate Dynamic l.ading Granite