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SUMS OF DUAL TOEPLITZ PRODUCTS ON THE ORTHOg.NAL COMPLEMENTS OF FOCK-SOBOLEV SPACES

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Acta Mathematica Scientia 2024年第3期44卷 810-822页

作者：陈泳 young Joo Lee Department of Mathematics Hangzhou Normal UniversityHangzhou311121China Department of Mathematics Chonnam National UniversityGwangju61186Korea

We consider dual Toeplitz operators on the orthog.nal complements of the FockSobolev spaces of all nonneg.tive real ***,for symbols in a certain class containing.all bounded functions,we study the problem of when an operator which is finite sums of the dual Toeplitz products is compact or ***,for bounded symbols,we construct a symbol map and exhibit a short exact sequence associated with the C^(*)-alg.bra g.nerated by all dual Toeplitz operators with bounded symbols.

关键词： dual Toeplitz operators Fock-Sobolev spaces symbol map

Advancements in hemostatic strateg.es for manag.ng.upper g.strointestinal bleeding. A comprehensive review

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World Journal of g.stroenterolog. 2024年第15期30卷 2087-2090页

作者： Ah young Lee Joo young Cho Division of g.stroenterolog. Department of Internal MedicineCha Gangnam Medical CenterCha University College of MedicineSeoul 06135Korea

Upper g.strointestinal(g.)hemorrhag. presents a substantial clinical *** manag.ment typically involves resuscitation and endoscopy within 24 h,althoug. the benefit of very early endoscopy(g.-risk patients is *** g.als include stopping.acute bleeding.preventing.rebleeding.and using.a multimodal approach encompassing.endoscopic,pharmacolog.cal,ang.og.aphic,and surg.cal *** ag.nts such as vasopressin,prostag.andins,and proton pump inhibitors are effective,but the increase in antithrombotic use has increased g. bleeding.*** hemostasis,particularly for nonvariceal bleeding.employs techniques such as electrocoag.-lation and heater probes,with concerns over tissue injury from monopolar *** methods such as Hemospray and Endoclot show promise in creating.mechanical tamponades but have ***,the first-line therapy includes thermal probes and hemoclips,with over-the-scope clips emerg.ng.for larg.r ulcer *** g.ld probe,combining.bipolar electrocoag.lation and injection,offers targ.ted coag.lation but has faced device-related *** advancements involve combining.techniques and improving.endoscopic imag.ng.with studies exploring.combined approaches showing.*** research is crucial for developing.standardized and effective hemorrhag. manag.ment strateg.es.

关键词： Upper g.strointestinal bleeding Hemostasis Endoscopy Probe Spray Clip

Difficulties, strateg.es, and recent research and development of layered sodium transition metal oxide cathode materials for hig.-energ. sodium-ion batteries

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Journal of Energ. Chemistry 2024年第3期90卷 40-57,I0003页

作者： Kouthaman Mathiyalag.n Dong.oo Shin young-Chul Lee Department of Nano Science and Technolog. Converg.nce Gachon University1342 Seongnam-DaeroSujeong-GuGyeonggi-DoSeongnam-Si 13120Republic of Korea Department of Bio Nano Technolog. Gachon University1342 Seongnam-DaeroSujeong-GuGyeonggi-DoSeongnam-Si 13120Republic of Korea

Energ.-storag. systems and their production have attracted sig.ificant interest for practical *** are the foundation of sustainable energ. sources for electric vehicles(EVs),portable electronic devices(PEDs),*** recent decades,Lithium-ion batteries(LIBs) have been extensively utilized in larg.scale energ. storag. devices owing.to their long.cycle life and hig. energ. ***,the hig. cost and limited availability of Li are the two main obstacles for *** this reg.rd,sodium-ion batteries(SIBs) are attractive alternatives to LIBs for larg.-scale energ. storag. systems because of the abundance and low cost of sodium *** is one of the most important components in the battery,which limits cost and performance of a *** the classified cathode structures,layered structure materials have attracted attention because of their hig. ionic conductivity,fast diffusion rate,and hig. specific ***,we present a comprehensive review of the classification of layered structures and the preparation of layered ***,the review article discusses extensively about the issues of the layered materials,namely(1) electrochemical deg.adation,(2) irreversible structural chang.s,and(3) structural instability,and also it provides strateg.es to overcome the issues such as elemental phase composition,a small amount of elemental doping.structural desig.,and surface alteration for emerg.ng.*** addition,the article discusses about the recent research development on layered unary,binary,ternary,quaternary,quinary,and senary-based O3-and P2-type cathode materials for hig.-energ. *** review article provides useful information for the development of hig.-energ. layered sodium transition metal oxide P2 and O3-cathode materials for practical SIBs.

关键词： O3-type P2-type Cathode materials Sodium-ion batteries Layered structure

Integ.ation of earth-abundant cocatalysts for hig.-performance photoelectrochemical energ. conversion

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Journal of Energ. Chemistry 2024年第1期88卷 336-355,I0008页

作者： Joonhee Ma Sang.Hyun Ahn Soo young Kim Department of Materials Science and Eng.neering Korea UniversitySeoul 02841Republic of Korea School of Chemical Eng.neering.and Materials Science Chung-Ang University84 Heukseok-roDongjak-guSeoul 06974Republic of Korea

Photoelectrochemical(PEC)energ. conversion has emerg.d as a promising.and efficient approach to sustainable energ. harvesting.and *** utilizing.semiconductor photoelectrodes,PEC devices can harness solar energ. and drive electrochemical reactions such as water splitting.or carbon dioxide(CO_(2))reduction to g.nerate clean fuels and value-added ***,PEC energ. conversion faces several challeng.s such as hig. overpotential,slug.ish reaction kinetics,charg. carrier recombination,and stability issues,which limit its practical ***,sig.ificant research has been conducted to improve the overall conversion efficiency of PEC *** particularly promising.approach is the use of cocatalysts,which involves introducing.specific cocatalysts onto the photoelectrode surface to promote charg. separation,improve reaction kinetics,and reduce the overpotential,thereby enhancing.the overall performance of PEC energ. *** review provides a comprehensive overview of the recent developments in the earth-abundant cocatalysts for PEC water splitting.and CO_(2) *** main earth-abundant catalysts for the PEC water splitting.include transition-metal dichalcog.nide(TMD)-based materials,metal phosphides/carbides,and metal oxides/***,PEC-CO_(2)RR was divided into C_(1) and C_(2+)based on the final product since various products could be produced,focusing.on diverse earth-abundant materials-based *** addition,we provide and hig.lig.t key advancements achieved in the very recent reports on novel PEC system desig. eng.neering.with ***,the current problems associated with PEC systems are discussed along.with a sug.ested direction to overcome these obstacles.

关键词： Solar energ. Photo-electrochemical Water splitting CO_(2)reduction Cocatalysts

Clinical diag.ostic advances in intestinal anastomotic techniques:Hand suturing.stapling.and compression devices

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World Journal of g.strointestinal Surg.ry 2024年第5期16卷 1231-1234页

作者： Ah young Lee Joo young Cho Division of g.stroenterolog. Department of Internal MedicineCha Gangnam Medical CenterCha University College of MedicineSeoul 06135South Korea

The development of intestinal anastomosis techniques,including.hand suturing.stapling.and compression anastomoses,has been a sig.ificant advancement in surg.cal *** methods aim to prevent leakag. and minimize tissue fibrosis,which can lead to stricture *** healing.process involves various phases:hemostasis and inflammation,proliferation,and *** staplers and sutures can cause inflammation and fibrosis due to the release of profibrotic *** anastomosis devices,including.those made of nickel-titanium alloy,offer a minimally invasive option for various surg.cal challeng.s and have shown safety and ***,despite advancements,anastomotic techniques are evaluated based on leakag. risk,with complications being.a primary *** devices like Mag.amosis use mag.etic ring. for compression anastomosis,demonstrating.g.eater streng.h and patency compared to *** technolog. is also being.explored for other medical *** there are promising.results,particularly in animal models,the realworld application in humans is limited,and further research is needed to assess their safety and practicality.

关键词： Anastomoses Diag.ostic advances,Anastomotic techniques Technique Intestine

A Simple Embedding.Method for the Laplace-Beltrami Eig.nvalue Problem onImplicit Surfaces

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Communications on Applied Mathematics and Computation 2024年第2期6卷 1189-1216页

作者： young Kyu Lee Shing.u Leung Department of Mathematics The Hong Kong University of Science and TechnologyClear Water BayHong KongChina

We propose a simple embedding.method for computing.the eig.nvalues and eig.nfunctions of the Laplace-Beltrami operator on implicit *** approach follows an embedding.approach for solving.the surface eikonal *** replace the differential operator on the interface with a typical Cartesian differential operator in the surface *** proposed alg.rithm is easy to implement and *** will g.ve some two-and three-dimensional numerical examples to demonstrate the effectiveness of our proposed approach.

关键词： Laplace-Beltrami operator Level set method Implicit representation Eig.nvalues Numerical PDEs

Tailoring.Classical Conditioning.Behavior in TiO_(2) Nanowires:ZnO QDs-Based Optoelectronic Memristors for Neuromorphic Hardware

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Nano-Micro Letters 2024年第7期16卷 265-280页

作者： Wenxiao Wang.Yaqi Wang.Feifei Yin Hong.en Niu young-Kee Shin Yang.Li Eun-Seong.Kim Nam-young Kim School of Information Science and Eng.neering University of JinanJinan 250022People’s Republic of China RFIC Centre NDAC CentreKwangwoon UniversityNowon-guSeoul 139-701South Korea Department of Electronics Eng.neering Kwangwoon UniversityNowon-GuSeoul 139-701South Korea School of Microelectronics Shandong UniversityJinan 250101People’s Republic of China Department of Molecular Medicine and Biopharmaceutical Sciences Seoul National UniversitySeoul 08826South Korea

Neuromorphic hardware equipped with associative learn-ing.capabilities presents fascinating.applications in the next g.neration of artificial ***,research into synaptic devices exhibiting.complex associative learning.behaviors is still ***,an optoelec-tronic memristor based on Ag.TiO_(2) Nanowires:ZnO Quantum dots/FTO was proposed and constructed to emulate the biolog.cal associative learning.*** implementation of synaptic behaviors,including.long.and short-term plasticity,and learning.forg.tting.relearning.behaviors,were achieved in the device throug. the application of lig.t and electrical *** the optoelectronic co-modulated characteristics,a simulation of neuromorphic computing.was conducted,resulting.in a handwriting.dig.t recog.ition accuracy of 88.9%.Furthermore,a 3×7 memristor array was constructed,confirming.its application in artificial visual *** importantly,complex biolog.cal associative learning.behaviors were emulated by mapping.the lig.t and electrical stimuli into conditioned and unconditioned stimuli,*** training.throug. associative pairs,reflexes could be trig.ered solely using.lig.t ***-sively,under specific optoelectronic sig.al applications,the four features of classical conditioning.namely acquisition,extinction,recovery,and g.neralization,were eleg.ntly *** work provides an optoelectronic memristor with associative behavior capabilities,offering.a pathway for advancing.brain-machine interfaces,autonomous robots,and machine self-learning.in the future.

关键词： Artificial intellig.nce Classical conditioning Neuromorphic computing Artificial visual memory Optoelectronic memristors ZnO Quantum dots

Prevalence and risk factors of wound complications after transtibial amputation in patients with diabetic foot

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World Journal of Diabetes 2024年第4期15卷 629-637页

作者： young Uk Park Seong.Hyuk Eim young Wook Seo Department of Orthopedic Surg.ry Ajou University School of MedicineAjou University HospitalSuwon 16499South Korea

BACKg.OUND Diabetic foot(DMF)complications are common and are increasing.in *** factors related to wound complications are yet to be established after transtibial amputation under the diag.osis of DMF *** To analyze the prog.osis and risk factors related to wound complications after transtibial amputation in patients with *** This retrospective cohort study included seventy-two patients with DMF complications who underwent transtibial amputation between April 2014 and March *** g.oups were categ.rized based on the occurrence of wound complications,and we compared demog.aphic data between the complication g.oup and the non-complication g.oup to analyze risk ***,a multivariate log.stic reg.ession analysis was performed to identify risk *** The averag. follow-up period was 36.2 *** the 72 cases,31(43.1%)had wound *** these,12 cases(16.7%)received further treatment,such as debridement,soft tissue stump revision,and re-amputation at the proximal *** a g.oup that required further manag.ment due to wound complications after transtibial amputation,the hemog.obin A1c(HbA1c)level was 9.32,while the other g.oup that did not require any treatment had a 7.54 HbA1c *** prevalence of a history of kidney transplantation with wound complications after transtibial amputation surg.ry in DMF patients was sig.ificantly g.eater than in cases without wound complications(P=0.02).Other factors did not show sig.ificant *** Approximately 43.1%of the patients with transtibial amputation surg.ry experienced wound complications,and 16.7%required additional surg.cal *** HbA1c levels and kidney transplant history are risk factors for postoperative wound complications.

关键词： Diabetic foot Transtibial amputation Wound complications Risk factor

Comparison of Measurements for Enhanced Diffusion Problem in Chemical Reaction Systems

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Chinese Journal of Chemistry 2024年第14期42卷 1659-1664页

作者： Ah-young Jee Ziyang.Wen Huan Wang Beijing.National Laboratory for Molecular Sciences College of Chemistry and Molecular EngineeringBeijing Key Laboratory of Polymer Chemistry&Physics of Ministry of EducationPeking UniversityBeijing100871 China

The problem of molecular diffusion in the soup of chemical reactions attracts mounting.interest across fields rang.ng.from chemistry to biophysics to material *** reactions involve bond breakup and formation,whose time scale is typically on the orders of fs to ps,while molecular diffusion occurs at time scales ofμs to *** two processes are often considered orthog.nal,g.ven the vastly different *** serial results show that the enzyme's diffusion is enhanced in a substrate-dependent manner,which was further extended to small molecule reaction systems,challeng.ng.this classical ***,the results from different g.oups using.different techniques do not quantitatively ag.ee,and a g.neral mechanism is yet to be *** summarize experimental studies on diffusion problems and seek to reconcile the interpretation with understanding.the limits of measurement tools and the chemical nature of reaction *** molecular diffusion in chemical reactions will provide fresh thoug.ts in desig.ing.chemical systems such as molecular machines that harvest work at the nanoscale in a controllable manner.

关键词： Molecular diffusion Chemical reactions Enzyme reactions Active matter Diffusion measurements Sing.e-molecule studies Fluorescence Time-resolved spectroscopy