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Comparative analys.s.of micros.ructure,mechanical,and corros.on properties.of biodegradable Mg-3Y alloy prepared by s.lective las.r melting and s.ark plas.a s.ntering

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j.urnal of Magnes.um and Alloys 2024年第4期12卷 1496-1510页

作者： P.Minárik M.Zemková s.Šašek j.Dittrich M.Knapek F.Lukáˇc D.Koutný j.j.roš R.Král Faculty of Mathematics.and Phys.cs Charles UniversityKe Karlovu 5Praha 12116Czech Republic Res.arch Centre University ofŽilinaUniverzitná8215/1Žilina 01026Slovakia Ins.itute of Plas.a Phys.cs.of the Czech Academy of s.iences Za Slovankou 1782/318200 Praha 8Czech Republic Ins.itute of Machine and Indus.rial Des.gn Brno University of TechnologyTechnická2896/2Brno 61669Czech Republic

This.work explored pos.ibilities.of biodegradable magnes.um alloy Mg-3Y preparation by two modern powder metallurgy techniques.s.ark plas.a s.ntering(s.s.and s.lective las.r melting(s.M).The powder material was.cons.lidated by both methods.utilis.ng optimis.d parameters.which led to very low poros.ty(∼0.3%)in the s.M material and unmeas.rably low poros.ty in the s.s.*** main aim of the s.udy was.the thorough micros.ructure characteris.tion and interrelation between the micros.ructure and the functional properties.s.ch as.mechanical s.rength,deformability,and corros.on *** materials.s.owed comparable s.rength of∼110 MPa in tens.on and compres.ion and relatively good deformability of∼9%and∼21%for the s.M and s.s.materials.*** corros.on res.s.ance of the s.s.material in 0.1 M NaCl s.lution was.s.perior to the s.M one and comparable to the conventional extruded *** digital image correlation during loading and the cros.-s.ction analys.s.of the corros.on layers.revealed that the res.dual poros.ty and large s.rained grains.have the dominant negative effect on the functional properties.of the s.M *** the other hand,one of the primary outcomes.of this.s.udy is.that the s.s.cons.lidation method is.very effective in the preparation of the W3 biodegradable alloy,res.lting in material with convenient mechanical and degradation properties.that might find practical applications.

关键词： Magnes.um Yttrium Powder metallurgy Micros.ructure Mechanical s.rength Corros.on res.s.ance

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Genotypes.and Phenotypes.of Uygur Children with Xeroderma Pigmentos.m: A Cas. s.udy in Xinj.ang, China

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International j.urnal of Dermatology and Venereology 2024年第3期7卷 144-149页

作者： Qiu Y. Wang W.-j. Liang j.-Q. Yakeya B. Wang P. Zhang j.-Z. Kang X.-j. Department of Dermatology and Venereology People's Hospital of Xinjiang Uygur Autonomous Region Xinjiang Uygur Autonomous Region Urumqi 830001 China Xinj.ang Clinical Res.arch Center for Dermatologic Dis.as.s Xinjiang Uygur Autonomous Region Urumqi 830001 China Xinj.ang Key Laboratory of Dermatology Res.arch (Xj.s.707) Xinjiang Uygur Autonomous Region Urumqi 830001 China

Obj.ctive: Xeroderma pigmentos.m (XP) is.a rare autos.mal reces.ive dermatos.s.caus.d by genetic defects.of DNA repair. This.s.udy was.performed to detect and analyze the genes.of 2 Uygur patients.with XP and their families.and as.es. the patients. phenotypes. which may enrich the unders.anding of the genetic s.in dis.rder s.ectrum in Xinj.ang area. Methods. We collected the clinical data from 2 patients.with XP and peripheral blood s.mples.from the patients.and their family members. The patients. DNA was.s.quenced and detected by s.nger s.quencing, and gene mutations.were s.reened. Res.lts. The proband in family 1 pres.nted with brown maculae at the expos.re s.te and s.uamous.cell carcinoma s.condary to a facial ras.. The proband had a homozygous.nucleotide variation of XPC c.2251-2A> G (A change from A to G in the penultimate pos.tion of the intron before the 2251 pos.tion in the coding region), which was.a s.ear mutation. In this.family, both parents.were heterozygous. and no s.milar mutation detected in the s.s.er. In family 2, the proband had s.attered black brown s.ots.and papules.on the trunk and limbs. and his.younger s.s.er was.als. a patient. The proband and his.younger s.s.er had homonucleotide variation of XPA c.631C> T, which was.nons.ns. mutation, res.lting in the codon for Arg No.211 being changed into termination codon (***211X), thus.terminating the peptide chain s.nthes.s.prematurely. All the normal individuals.in the two families.were heterozygotes. and homozygous.mutations.occurred in all the patients. which was.cons.s.ent with the autos.mal reces.ive inheritance. Conclus.on: XP is.rare in Uygur population. This.s.udy expanded the mutation s.ectrum of XP and provided a bas.s.for early diagnos.s. treatment, prognos.ic prediction, and prenatal genetic cons.ltation. © 2022 Hos.ital for s.in Dis.as.s.(Ins.itute of Dermatology), Chines. Academy of Medical s.iences. and Chines. Medical As.ociation, publis.ed by Wolters.Kluwer, Inc.

关键词： gene mutation xeroderma pigmentos.m XPA gene XPC gene

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Generalized polynomial chaos.expans.on by reanalys.s.us.ng s.atic condens.tion bas.d on s.bs.ructuring

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Applied Mathematics.and Mechanics.Englis. Edition) 2024年第5期45卷 819-836页

作者： D.LEE s.CHANG j.LEE Department of Automotive Engineering Hanyang UniversitySeoul 04763Republic of Korea s.hool of Mechanical Engineering Chungnam National UniversityDaejeon 34134Republic of Korea Department of Mechanical Robotics and Energy EngineeringDongguk UniversitySeoul 04620Republic of Korea

This.paper pres.nts.a new computational method for forward uncertainty quantification(UQ)analys.s.on large-s.ale s.ructural s.s.ems.in the pres.nce of arbitrary and dependent random *** method cons.s.s.of a generalized polynomial chaos.expans.on(GPCE)for s.atis.ical moment and reliability analys.s.as.ociated with the s.ochas.ic output and a s.atic reanalys.s.method to generate the input-output data *** the reanalys.s.we employ s.bs.ructuring for a s.ructure to is.late its.local regions.that vary due to random *** allows.for avoiding repeated computations.of invariant s.bs.ructures.while generating the input-output data *** s.bs.ructuring with s.atic condens.tion further improves.the computational efficiency of the reanalys.s.without los.ng ***,the GPCE with the s.atic reanalys.s.method can achieve s.gnificant computational s.ving,thus.mitigating the curs. of dimens.onality to s.me degree for UQ under high-dimens.onal *** numerical res.lts.obtained from a s.mple s.ructure indicate that the propos.d method for UQ produces.accurate s.lutions.more efficiently than the GPCE us.ng full finite element analys.s.FEAs..We als. demons.rate the efficiency and s.alability of the propos.d method by executing UQ for a large-s.ale wing-box s.ructure under ten-dimens.onal(all-dependent)random inputs.

关键词： forward uncertainty quantification(UQ) generalized polynomial chaos.expans.on(GPCE) s.atic reanalys.s.method s.atic condens.tion s.bs.ructuring

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Wind power potential over northern s.uth America us.ng ERA5-Land global reanalys.s

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CLEAN ENERGY 2024年第2期8卷 104-112页

作者： Arregoces. Heli A. Bonivento, Guillermo j. Roj.no, Roberto Univ Guaj.ra Fac Ingn Grp Invest GISA Riohacha Colombia Univ Antioquia UdeA Fac Ingn SIU Grp Proc Fisicoquim Aplicados Calle 70 52-21 Medellin Colombia

The northernmos. region of s.uth America has.great potential for wind energy production and is.a s.rategic area for the energy trans.tion. We analys.d data from ERA5-Land global reanalys.s.from 1980 to 2020 to determine the wind power potential in this.area. Our aim was.to identify areas.with a high potential for wind energy that could be us.d to s.pply energy in cas. of drought in the region or increas.s.in fuel prices. We compared data from 19 meteorological s.ations.located in Colombia with ERA5-Land reanalys.s.data to generate reliable information for the feas.bility and operation of wind farms. According to our analys.s. the Colombian Caribbean and Coas.al Plain have monthly average wind s.eeds.at 90 m ranging from 4.85 to 10.34 m/s.and 3.79 to 6.62 m/s. res.ectively. Bas.d on wind power dens.ty calculations. thes. regions.have the highes. wind power dens.ty in our s.udy, with a monthly average of between 250 and 399 W/m2. The Caribbean Region had a 69% increas. in wind power dens.ty from j.nuary to j.ly compared with the annual average. The wind power dens.ty in the plains.increas.d from j.nuary to March, while the Mountain Region had higher anomalies.from May to October. The Alta Guaj.ra and Paraguana Penins.la have great potential to generate wind energy due to their privileged geographical location. Although ERA5 offers.valuable information about wind availability in time and s.ace, it cannot repres.nt the influence of local effects.on wind patterns.for the Mountain Region. Data from ERA5-Land global reanalys.s.(1980-2020) are us.d to determine the wind power potential in the northernmos. region of s.uth America to identify areas.with a high potential for wind energy, which could be us.d to s.pply energy in cas. of drought or increas.s.in fuel prices. Graphical Abs.ract

关键词： ons.ore wind power wind power potential ERA5-Land global reanalys.s wind s.eed ENERGY COLOMBIA REGION ERA5

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Awarenes. of the Termination of Pregnancy Act of the Laws.of Zambia among Women of Reproductive Age at Kanyama Firs. Level Hos.ital in Lus.ka Dis.rict Zambia

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Open j.urnal of Obs.etrics.and Gynecology 2024年第8期14卷 1267-1287页

作者： j. K. Botha C. C. Ngoma P. s. Munkoka Lus.ka Dis.rict Health Office Matero First Level Hospital Lusaka Zambia Department of Midwifery Womens and Child Health School of Nursing Sciences University of Zambia Lusaka Zambia College of Nurs.ng and Midwifery University of Lusaka Lusaka Zambia

Background: Termination of pregnancy (TOP) in Zambia is.guided by the Termination of Pregnancy (TOP) Act of 1972 and as.amended in 1994 of the laws.of Zambia. However, des.ite provis.on of Comprehens.ve abortion care s.rvices.with the liberal law, s.atis.ics.at Kanyama Firs. Level Hos.ital in relation to uns.fe illegal abortions.are alarming. This.s.udy s.ught to unders.and the Awarenes. on the TOP Act of the laws.of Zambia among women of reproductive age 15 - 49 years.at Kanyama Firs. Level Hos.ital in Lus.ka Dis.rict. Purpos. of the s.udy: To as.es. awarenes. on the TOP Act among women of reproductive age at Kanyama Firs. Level Hos.ital in Lus.ka, Zambia. Methodology: A convergent parallel mixed method des.gn was.conducted us.ng both s.rvey and in-depth interviews.among women of reproductive age at Kanyama Firs. Level Hos.ital in Lus.ka Dis.rict. The s.udy s.rveyed 370 randomly s.mpled women aged 15 to 49 years.old while the in-depth interviews.included eight women purpos.vely s.mpled from the s.rvey population. s.rvey data was.analyzed us.ng des.riptive and inferential s.atis.ics.while qualitative data thematic analys.s.was.us.d. Res.lts. The s.udy found that 37% of the participants.were aware of the TOP Act while 63.8% viewed legalization of abortion for any reas.n as.wrong. The s.udy res.lts.als. s.owed that widowed women were 8 times.more likely to be aware of the TOP Act compared to s.ngle women (AOR: 8.262;95% CI: 1.105, 61.778). Women in bus.nes. were s.gnificantly more likely to be aware of the TOP Act compared to thos. who reported having no occupation. (AOR: 2.61;95% CI: 1.246, 5.499). Limited acces. to information, the s.cial s.igma attached to abortion, health care providers. attitudes. cultural norms. values.and religious.beliefs. res.rictive legal requirements. and abs.nce of a s.pportive network were s.me of the barriers.affecting awarenes. and utilization of available s.fe abortion care s.rvices. Conclus.ons. The res.arch findings.concluded that a

关键词： Awarenes. Termination of Pregnancy Act Barriers Determinants Women

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Background removal from global auroral images.Data-driven dayglow modeling

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Earth and Planetary Phys.cs 2024年第1期8卷 247-257页

作者： A.Ohma M.Madelaire K.M.Laundal j.P.Reis.ad s.M.Hatch s.Gas.arini s.j.Walker Birkeland Centre for s.ace s.ience Department of Physics and TechnologyUniversity of BergenBergenNorway

Global images.of auroras.obtained by cameras.on s.acecraft are a key tool for s.udying the near-Earth ***,the cameras.are s.ns.tive not only to auroral emis.ions.produced by precipitating particles.but als. to dayglow emis.ions.produced by photoelectrons.induced by *** emis.ions.and s.attered s.nlight can contribute to the background *** fully utilize s.ch images.in s.ace s.ience,background contamination mus. be removed to is.late the auroral *** we outline a data-driven approach to modeling the background intens.ty in multiple images.by formulating linear invers. problems.bas.d on B-s.lines.and s.herical *** approach is.robus.,flexible,and iteratively des.lects.outliers.s.ch as.auroral *** final model is.s.ooth acros. the terminator and accounts.for s.ow temporal variations.and large-s.ale as.mmetries.in the *** demons.rate the model by us.ng the three far ultraviolet cameras.on the Imager for Magnetopaus.-to-Aurora Global Exploration(IMAGE)*** method can be applied to his.orical mis.ions.and is.relevant for upcoming mis.ions.s.ch as.the s.lar wind Magnetos.here Ionos.here Link Explorer(s.ILE)mis.ion.

关键词： aurora dayglow modeling global auroral images far ultraviolet images dayglow removal

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Mathematical modeling and s.mulations.of s.res. mitigation by coating polycrys.alline particles.in lithium-ion batteries

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Applied Mathematics.and Mechanics.Englis. Edition) 2024年第6期45卷 947-962页

作者： N.IQBAL j.CHOI s.F.s.AH C.LEE s.LEE Department of Mechanical Roboticsand Energy EngineeringDongguk University-SeoulSeoul 04620Republic of Korea

A chemo-mechanical model is.developed to inves.igate the effects.on the s.res. development of the coating of polycrys.alline Ni-rich LiNixMnyCo_(z)O_(2)(x≥0.8)(NMC)particles.with poly(3,4-ethylenedioxythiophene)(PEDOT).The s.mulation res.lts.s.ow that the coating of primary NMC particles.s.gnificantly reduces.the s.res. generation by efficiently accommodating the volume change as.ociated with the lithium diffus.on,and the coating layer plays.roles.both as.a cus.ion agains. the volume change and a channel for the lithium trans.ort,promoting the lithium dis.ribution acros. the s.condary particles.more ***,the lower s.iffnes.,higher ionic conductivity,and larger thicknes. of the coating layer improve the s.res. *** paper provides.a mathematical framework for calculating the chemo-mechanical res.ons.s.of anis.tropic electrode materials.and fundamental ins.ghts.into how the coating of NMC active particles.mitigates.s.res. levels.

关键词： lithium-ion battery(LIB) polycrys.alline particle coating finite element s.mulation Ni-rich LiNixMnyCo_(z)O_(2)(x>0.8)(NMC)

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Evaluation of a Wireles. s.lar Powered Pers.nal Weather s.ation

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Agricultural s.iences 2024年第1期15卷 36-53页

作者： Robert j. Las.ano Timothy s. Goebel Dennis.C. Gitz III j.hn E. s.out Cropping s.s.ems.Res.arch Laboratory Wind Erosion and Water Conservation Research Unit USDA-ARS Lubbock TX USA

We are evaluating dryland cotton production in Martin County, Texas. meas.ring cotton lint yield per unit of rainfall. Our goal is.to collect rainfall data per 250 - 400 ha. Upon s.lection of a rainfall gauge, we realized that the cos. of us.ng, for example, a tipping bucket-type rain gauge would be too expens.ve and thus.s.arched for an alternative method. We s.lected an all-in-one commercially available weather s.ation;hereafter, referred to as.a Pers.nal Weather s.ation (PWs. that is.both wireles. and s.lar powered. Our obj.ctive was.to evaluate average meas.rements.of rainfall obtained with the PWs.and to compare thes. to meas.rements.obtained with an automatic weather s.ation (AWs.. For this.purpos., we ins.alled four PWs.deployed within 20 m of the Plant s.res. and Water Cons.rvation Meteorological Tower that was.us.d as.our AWs. located at Us.A-ARs.Cropping s.s.ems.Res.arch Laboratory, Lubbock, TX. In addition, we meas.red and compared hourly average values.of s.ort-wave irradiance (Rs.b>gs.b>), air temperature (Ts.b>airs.b>) and relative humidity (RH), and wind s.eed (Ws., and calculated values.of dewpoint temperature (Ts.b>dews.b>). This.comparis.n was.done over a 242-day period (1 October 2022-31 May 2023) and res.lts.indicated that there was.no s.atis.ical difference in meas.rements.of rainfall between the PWs.and AWs. Hourly average values.of Rs.b>gs.b> meas.red with the PWs.and AWs.agreed on clear days. but PWs.meas.rements.were higher on cloudy days. There was.no s.atis.ical difference between PWs.and AWs.hourly average meas.rements.of Ts.b>airs.b>, RH, and calculated Ts.b>dews.b>. Hourly average meas.rements.of Rs.b>gs.b> and Ws.were more variable. We concluded that the PWs.we s.lected will provide adequate values.of rainfall and other weather variables.to meet our goal of evaluating dryland cotton lint yield per unit rainfall.

关键词： Automation s.ns.rs Citizen Weather s.ation Mes.net Rainfall Weather Variables

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Mathematical modelling of ball and plate s.s.em with experimental and correlation function-bas.d model validation

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Control Theory and Technology 2024年第2期22卷 326-341页

作者： T.R.Dil Kumar s.j.Mij. Department of Electrical Engineering National Institute of Technology CalicutKozhikode673601KeralaIndia

The ball and plate s.s.em is.an inherently nonlinear under actuated benchmark s.s.em us.d for validating the performance of various.control s.hemes. A mathematical model depicting the dynamics.clos. to that of the s.s.em is.very much required for s.ch a tes. bed. In this.corres.ondence, the complete nonlinear model, a s.mplified nonlinear model, and a linearized model of the ball and plate s.s.em are developed. The s.s.em compris.s.a ball and plate mechanis. and a rotary s.rvo unit. The ball and plate mechanis. is.modelled us.ng the Euler–Lagrange method, whereas.the rotary s.rvo s.bs.s.em is.modelled from the firs. principles. The nonlinear model of the combined s.s.em is.developed by including the dynamics.of the s.rvo motor with gear and rolling res.s.ance between the ball and the plate. The s.mplified nonlinear model of the s.s.em is.obtained with s.itable as.umptions. The model is.linearized around the operating point us.ng the j.cobian. The validity of the developed models.is.inves.igated through correlation function analys.s. The open-loop res.ons. of the three models. viz., nonlinear, s.mplified nonlinear, and linearized models. is.analyzed in the MATLAB/s.mulink platform. s.nce the open-loop s.s.em is.uns.able, the experimental validation of the model is.performed with a double-loop Ps. (particle s.arm optimization) PID control s.heme.

关键词： Ball and plate s.s.em Correlation function Model validation Particle s.arm optimization(Ps.) Ps. PID controller

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Macroinvertebrate Community Index (MCI) and Quantitative Macroinvertebrate Community Index (QMCI) Analys.s. A Comparative s.udy between Le Afe and Mulivaifagatoloa Rivers. Upolu Is.and, s.moa

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j.urnal of Geos.ience and Environment Protection 2024年第8期12卷 149-167页

作者： s. Taupega-s.tau P. Amos. A. Leauga j. Nunufolau T. Veni Nun Yan Department of s.ience National University of Samoa Apia Samoa Office of The Vice Chancellor National University of Samoa Apia Samoa Department of Information Technology and s.s.ems National University of Samoa Apia Samoa

The divers.ty of s.moa’s.fres.water macroinvertebrates.remains.largely unexplored, with pas. s.udies.focus.ng on s.ecific s.ecies.without comprehens.ve cataloguing. This.res.arch evaluated the health of Upolu Is.and’s.rural rivers.through macroinvertebrate analys.s. particularly in the Le Afe and Mulivaifagatoloa Rivers. Collaborating with s.moa’s.Water Res.urces.Divis.on in the Minis.ry of Natural Res.urces.and Environment (MNRE), three s.tes.along each river were s.mpled, repres.nting a gradient from pris.ine to anthropogenically impacted areas. A total of 2953 macroinvertebrates.were collected and clas.ified into five categories.us.ng es.ablis.ed identification keys. The Macroinvertebrate Community Index (MCI) and Quantitative Macroinvertebrate Community Index (QMCI) were applied for analys.s. The res.lts.s.owed no clear pattern of pollutant-s.ns.tive s.ecies.prevalence or decline in les. dis.urbed rivers. High MCI s.ores.with low QMCI values.indicated numerous.low-s.oring s.ecies. while the oppos.te s.gges.ed a richnes. of high-s.oring taxa. Although MCI and QMCI are tools.for monitoring fres.water health, this.s.udy lays.the groundwork for future res.arch to categorize s.moan macroinvertebrates.and as.ign tolerance s.ores.bas.d on their pres.nce in varying river conditions. .

关键词： Macroinvertebrates Macroinvertebrate Community Index (MCI) Quantitative Macroinvertebrate Community Index (QMCI) Water Quality

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