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Direct 4D printing of functionally graded h.drogel networks for biodegradable,unteth.red,and multimorph.c soft robots

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International Journal of Extreme Manufacturing 2024年第2期6卷 407-416页

作者： Soo Young cho Dong h.e h. Sae Byeok Jo Jeong h. cho Department of Ch.mical and Biomolecular Engineering Yonsei UniversitySeoul 03722Republic of Korea Department of Mech.nical Engineering Virginia TechBlacksburgVA 24061United States of America School of Ch.mical Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea SKKU Institute of Energy Science and Tech.ology(SIEST) Sungkyunkwan UniversitySuwon 16419Republic of Korea

Recent advances in functionally graded additive manufacturing(FGAM)tech.ology h.ve enabled th. seamless h.bridization of multiple functionalities in a single *** robotics can become one of th. largest beneficiaries of th.se advances,th.ough.th. design of a facile four-dimensional(4D)FGAM process th.t can grant an intelligent stimuli-responsive mech.nical functionality to th. printed ***,we present a simple binder jetting approach.for th. 4D printing of functionally graded porous multi-materials(FGMM)by introducing rationally designed graded multiph.se feeder *** graded cross-linking agents gradually form stable porous network structures with.n aqueous polymer particles,enabling programmable h.groscopic deformation with.ut complex mech.nical ***,a systematic bed design incorporating additional functional agents enables a multi-stimuli-responsive and unteth.red soft robot with.stark stimulus *** biodegradability of th. proposed 4D-printed soft robot furth.r ensures th. sustainability of our approach.with.immediate degradation rates of 96.6%with.n 72 *** proposed 4D printing concept for FGMMs can create new opportunities for intelligent and sustainable additive manufacturing in soft robotics.

关键词： intelligent and sustainable additive manufacturing multi-material four-dimensional printing unteth.red soft robot multi-stimuli-responsive soft robot biodegradable soft robotics

Advancements in h.mostatic strategies for managing upper gastrointestinal bleeding: A compreh.nsive review

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World Journal of Gastroenterology 2024年第15期30卷 2087-2090页

作者： Ah.Young Lee Joo Young cho Division of Gastroenterology Department of Internal MedicineCha Gangnam Medical CenterCha University College of MedicineSeoul 06135Korea

Upper gastrointestinal(GI)h.morrh.ge presents a substantial clinical *** management typically involves resuscitation and endoscopy with.n 24 h.alth.ugh.th. benefit of very early endoscopy(h.for h.gh.risk patients is *** goals include stopping acute bleeding,preventing rebleeding,and using a multimodal approach.encompassing endoscopic,ph.rmacological,angiograph.c,and surgical *** agents such.as vasopressin,prostaglandins,and proton pump inh.bitors are effective,but th. increase in antith.ombotic use h.s increased GI bleeding *** h.mostasis,particularly for nonvariceal bleeding,employs tech.iques such.as electrocoagu-lation and h.ater probes,with.concerns over tissue injury from monopolar *** meth.ds such.as h.mospray and Endoclot sh.w promise in creating mech.nical tamponades but h.ve ***,th. first-line th.rapy includes th.rmal probes and h.moclips,with.over-th.-scope clips emerging for larger ulcer *** gold probe,combining bipolar electrocoagulation and injection,offers targeted coagulation but h.s faced device-related *** advancements involve combining tech.iques and improving endoscopic imaging,with.studies exploring combined approach.s sh.wing *** research.is crucial for developing standardized and effective h.morrh.ge management strategies.

关键词： Upper gastrointestinal bleeding h.mostasis Endoscopy Probe Spray Clip

Correlation between h.dration properties and electroch.mical performances on Ln cation size effect in layered perovskite for protonic ceramic fuel cells

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Journal of Energy Ch.mistry 2024年第1期88卷 1-9,I0001页

作者： Inh.eok cho Jiwon Yun Boseok Seong Junseok Kim Sun h.e choi h.-Il Ji Sih.uk choi Department of Mech.nical Engineering Kumoh National Institute of TechnologyGumi 39177GyeongbukRepublic of Korea Department of Aeronautics Mechanical and Electronic Convergence EngineeringKumoh National Institute of TechnologyGumi 39177GyeongbukRepublic of Korea Center for Energy Materials Research Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Center for h.drogen and Fuel Cell Research Clean Technology Research DivisionKorea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Department of Energy and Environmental Engineering University of Science and TechnologySeoul 02792Republic of Korea Nanomaterials Science and Engineering Korea University of Science and Technology(UST)KIST CampusSeoul 02792Republic of Korea

PrBa_(0.5)Sr_(0.5)Co_(1.5)Fe_(0.5)O_(5+δ)(PrBSCF) h.s attracted much.research.interest as a potential triple ionic and electronic conductor(TIEC) electrode for protonic ceramic fuel cells(PCFCs). Th. ch.mical formula for Pr BSCF is AA'B_(2)O_(5+δ), with.Pr(A-site) and Ba/Sr(A'-site) alternately stacked along th. c-axis. Due to th.se structural features, th. bulk oxygen ion diffusivity is significantly enh.nced th.ough.th. disorder-free ch.nnels in th. PrO layer;th.s, th. A site cations(lanth.nide ions) play a pivotal role in determining th. overall electroch.mical properties of layered perovskites. Consequently, previous research.h.s predominantly focused on th. electrical properties and oxygen bulk/surface kinetics of Ln cation effects,wh.reas th. h.dration properties for PCFC systems remain unidentified. h.re, we th.rough.y examined th. proton uptake beh.vior and th.rmodynamic parameters for th. h.dration reaction to conclusively determine th. ch.nges in th. electroch.mical performances depending on LnBa_(0.5)Sr_(0.5)Co_(1.5)Fe_(0.5)O_(5+δ)(LnBSCF,Ln=Pr, Nd, and Gd) cath.des. At 500 ℃, th. quantitative proton concentration of PrBSCF was 2.04 mol% and progressively decreased as th. Ln cation size decreased. Similarly, th. Gibbs free energy indicated th.t less energy was required for th. formation of protonic defects in th. order of Pr BSCF h. close relationsh.p between h.dration properties and electroch.mical performances in LnBSCF cath.des, PCFC single cell measurements and analysis of th. distribution of relaxation time were furth.r investigated.

关键词： Protonic ceramic fuel cell Cath.de Triple ionic and electronic conductor h.dration property Proton uptake Gibbs free energy

Effect of Meteorological Data Assimilation on Regional Air Quality Forecasts over th. Korean Peninsula

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Journal of Meteorological Research 2024年第2期38卷 262-284页

作者： Yunjae cho h.un Mee KIM Eun-Gyeong YANG Yongh.e LEE Jae-Bum LEE Soyoung h. Department of Atmosph.ric Sciences Yonsei UniversitySeoul 03722Republic of Korea Air Quality Forecasting Center National Institute of Environmental ResearchIncheon 22689Republic of Korea National Center for Atmosph.ric Research BoulderCO 80305USA University of Maryland Baltimore County BaltimoreMD 21250USA Global Modeling and Assimilation Office NASA Goddard Space Flight CenterGreenbeltMD 20771USA

Th. Weath.r Research.and Forecasting model coupled with.Ch.mistry(WRF-Ch.m),a type of online coupled ch.mistry-meteorology model(CCMM),considers th. interaction between air quality and meteorology to improve air quality *** data assimilation(DA)can be used to reduce uncertainty in meteorological field,wh.ch.is one factor causing prediction uncertainty in th. *** th.s study,WRF-Ch.m and th.ee-dimensional variational DA were used to examine th. impact of meteorological DA on air quality and meteorological forecasts over th. Korean *** nesting model domains were configured over East Asia(outer domain)and th. Korean Peninsula(inner domain).Th.ee experiments were conducted by using different DA domains to determine th. optimal model domain for th. meteorological *** th. meteorological DA was performed in th. outer domain or both.th. outer and inner domains,th. root-mean-square error(RMSE),bias of th. predicted particulate matter(PM)concentrations,and th. RMSE of predicted meteorological variables against th. observations were smaller th.n th.se in th. experiment wh.re th. meteorological DA was performed only in th. inner *** indicates th.t th. improvement of th. synoptic meteorological fields by DA in th. outer domain enh.nced th. meteorological initial and boundary conditions for th. inner domain,subsequently improving air quality and meteorological *** to th. experiment with.ut meteorological DA,th. RMSE and bias of th. meteorological and PM variables were smaller in th. experiments with.*** effect of meteorological DA on th. improvement of PM predictions lasted for approximately 58-66 h.depending on th. ***,th. uncertainty reduction in th. meteorological initial condition by th. meteorological DA contributed to a reduction of th. forecast errors of both.meteorology and air quality.

关键词： meteorological data assimilation regional air quality forecast particulate matter concentration optimal model domain forecast error WRF-Ch.m

Surface-modified Ag@Ru-P25 for ph.tocatalytic CO_(2) conversion with.h.gh.selectivity over Ch.(4) formation at th. solid–gas interface

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Carbon Energy 2024年第1期6卷 182-196页

作者： Ch.itanya B.h.ragond Soh.g Biswas Niket SPowar Junh. Lee Eunh.e Gong h.apyong Kim h.ng Soo Kim Jin-Woo Jung Ch.ng-h.e cho Bryan M.Wong Su-Il In Department of Energy Science&Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)DaeguRepublic of Korea Department of Ch.mical&Environmental Engineering Materials Science&Engineering ProgramDepartment of ChemistryDepartment of Physics&AstronomyUniversity of California-RiversideRiversideCaliforniaUSA Department of Ph.sics and Ch.mistry Daegu Gyeongbuk Institute of Science and Technology(DGIST)DaeguRepublic of Korea NiceScience Corporation DaeguRepublic of Korea

Systematic optimization of th. ph.tocatalyst and investigation of th. role of each.component is important to maximizing catalytic activity and compreh.nding th. ph.tocatalytic conversion of CO_(2) reduction to solar fuels.A surface-modified Ag@Ru-P25 ph.tocatalyst with.h.(2)O_(2) treatment was designed in th.s study to convert CO_(2) and h.(2)O vapor into h.gh.y selective *** doping followed by Ag nanoparticles(NPs)cocatalyst deposition on P25(TiO_(2))enh.nces visible ligh. absorption and ch.rge separation,wh.reas h.(2)O_(2) treatment modifies th. surface of th. ph.tocatalyst with.h.droxyl(–Oh.groups and promotes CO_(2) ***-resonance transmission electron microscopy,X-ray ph.toelectron spectroscopy,X-ray absorption near-edge structure,and extended X-ray absorption fine structure tech.iques were used to analyze th. surface and ch.mical composition of th. ph.tocatalyst,wh.le th.rmogravimetric analysis,CO_(2) adsorption isoth.rm,and temperature programmed desorption study were performed to examine th. significance of h.(2)O_(2) treatment in increasing CO_(2) reduction *** optimized Ag1.0@Ru1.0-P25 ph.tocatalyst performed excellent CO_(2) reduction activity into CO,Ch.,and C2h. with.a~95%selectivity of Ch.,wh.re th. activity was~135 times h.gh.r th.n th.t of pristine TiO_(2)(P25).For th. first time,th.s work explored th. effect of h.(2)O_(2) treatment on th. ph.tocatalyst th.t dramatically increases CO_(2) reduction activity.

关键词： gas-ph.se CO_(2) reduction h.(2)O_(2) treatment plasmonic nanoparticles solar fuel ph.tocatalyst surface modification

Surgical Repair of Ventricular Septal Defect in Neonates: Indications and Outcomes

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Congenital h.art Disease 2024年第1期19卷 69-83页

作者： Jae h.ng Lee Sungkyu cho Jae Gun Kwak h.e Won Kwon Woong-h.n Kim Mi Kyoung Song Sang-Yun Lee Gi Beom Kim Eun Jung Bae Department of Th.racic and Cardiovascular Surgery Research Institute for Convergence of Biomedical Science and TechnologyPusan National University Yangsan HospitalYangsanKorea Department of Th.racic and Cardiovascular Surgery Seoul National University Children’s HospitalSeoulKorea Department of Pediatrics Seoul National University Children’s HospitalSeoulKorea

Background:Th. optimal surgical timing and clinical outcomes of ventricular septal defect(VSD)closure in neo-nates remain *** aimed to evaluate th. clinical outcomes of VSD closure in neonates(age≤30 days).Meth.ds:We retrospectively reviewed 50 consecutive neonates wh. underwent VSD closure for isolated VSDs between August 2003 and June *** for th. procedure included congestive h.art failure/failure to th.ive and pulmonary *** adverse events(MAEs)were deﬁned as th. composite of all-cause mortality,reoperation,persistent atrioventricular block,and signiﬁcant(≥grade 2)valvular ***:Th. median age and body weigh. at operation were 26.0 days(interquartile range[IQR],18.8–28.3)and 3.7 kg(IQR,3.3–4.2),*** median follow-up duration was 110.4 month.(IQR,56.8–165.0).Seven patients required preoperative respiratory support,andﬁve h.d signiﬁcant(≥grade 2)preoperative valvular *** early mortality occurred due to irreversible cardiogenic sh.ck;no late mortality was *** reopera-tion was due to h.modynamically signiﬁcant residual VSD at 103.8 month. *** overall survival,freedom from reoperation,and freedom from MAE at 15-years were 98.0%,96.3%,and 94.4%,***-operative mech.nical ventilation was associated with.a longer duration of postoperative mech.nical ventilation(ph.of intensive care unit stay(ph.favorable outcomes with.ut morbidities is feasible even in ***,neonates requiring preoperative respiratory support may require careful postoperative management considering th. long-term postoperative ***,surgical VSD closure migh. be indicated earlier in neonates with.respiratory compromise.

关键词： Ventricular septal defect neonate early surgery neonatal surgery

Unraveling links between aging,circadian rh.th. and cancer:Insigh.s from evidence-based analysis

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Ch.nese Journal of Cancer Research 2024年第3期36卷 341-350页

作者： Dech.o Feng Yuh.n Xiao Jie Wang Ruich.ng Wu Zh.uting Tuo Koo h.n Yoo Wuran Wei Dilinaer Wusiman Zh.peng Wang Dengxiong Li Yubo Yang William C.cho Mang Ke Department of Urology Institute of UrologyWest China HospitalSichuan UniversityChengdu 610041China Division of Surgery&Interventional Science University College LondonLondon W1W 7TSUK Department of Urology Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical UniversityTaizhou 317000China Department of Urology the Second Affiliated Hospital of Anhui Medical UniversityHefei 230601China Department of Urology Kyung Hee UniversitySeoul 130-701South Korea Department of Comparative Path.biology College of Veterinary MedicinePurdue UniversityWest LafayetteIN47907USA Purdue Institute for Cancer Research Purdue UniversityWest LafayetteIN 47907USA Department of Urology Sichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengdu 610072China Department of Urology Three Gorges HospitalChongqing UniversityChongqing 404000China Department of Clinical Oncology Queen Elizabeth HospitalHong Kong SARChina

Aging and circadian rh.th.s h.ve been connected for decades,but th.ir molecular interaction h.s remained unknown,especially for *** th.s situation,we summarized th. current research.actuality and problems in th.s field using th. bibliometric *** in th. PubMed and Web of Science databases were ***,th.re is a rising trend in th. publication volume regarding aging and circadian rh.th.s in th. field of *** from USA,Germany,Italy,Ch.na and England h.ve greater studies th.n *** th.ee publication institutions are University of California System,UDICE-French.Research.Universities and University of Texas *** research.h.tspots include oxidative stress,breast cancer,melatonin,cell cycle,calorie restriction,prostate cancer and NF-κ*** conclusion,results generated by bibliometric analysis indicate th.t many approach.s involve in th. complex interactions between aging and circadian rh.th. in *** establish.d and emerging research.directions guide our exploration of th. regulatory mech.nisms of aging and circadian rh.th.s in cancer and provide a reference for developing new research.avenues.

关键词： Aging circadian rh.th. h.man cancer bibliometric analysis oxidative stress

Multifunctional MXene/Carbon Nanotube Janus Film for Electromagnetic Sh.elding and Infrared Sh.elding/Detection in h.rsh.Environments

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Nano-Micro Letters 2024年第10期16卷 543-560页

作者： Tufail h.ssan Aamir Iqbal Byungkwon Yoo Jun Young Jo Nilufer Cakmakci Sh.bbir Madad Naqvi h.erim Kim Sungmin Jung Noush.d h.ssain Ujala Zafar Soo Yeong cho Seungh.an Jeong Jaewoo Kim Jung Min Oh.Sangwoon Park Youngjin Jeong chong Min Koo School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySeobu-ro 2066Jangan-guSuwon-siGyeonggi-do 16419Republic of Korea Department of Materials Science and Engineering Soongsil UniversitySeoul 06978Republic of Korea Institute of Advanced Composite Materials Korea Institute of Science and Technology92 Chudong-roBongdong-eupWanju-gunJeollabuk-do 55324Republic of Korea R&D Center INNOMXENE Co. Ltd.Daejeon 34365Republic of Korea School of Ch.mical Engineering Sungkyunkwan UniversitySeobu-ro 2066Jangan-guSuwon-siGyeonggi-do 16419Republic of Korea

Multifunctional,flexible,and robust th.n films capable of operating in demanding h.rsh.temperature environments are crucial for various cutting-edge *** study presents a multifunctional Janus film integrating h.gh.y-crystalline Ti_(3)C_(2)T_(x) MXene and mech.nically-robust carbon nanotube(CNT)film th.ough.strong h.drogen *** h.brid film not only exh.bits h.gh.electrical conductivity(4250 S cm^(-1)),but also demonstrates robust mech.nical strength.and durability in both.extremely low and h.gh.temperature environments,sh.wing exceptional resistance to th.rmal *** h.brid Janus film of 15μm th.ckness reveals remarkable multifunctionality,including efficient electromagnetic sh.elding effectiveness of 72 dB in X band frequency range,excellent infrared(IR)sh.elding capability with.an average emissivity of 0.09(a minimal value of 0.02),superior th.rmal camouflage performance over a wide temperature range(−1 to 300℃)ach.eving a notable reduction in th. radiated temperature by 243℃ against a background temperature of 300℃,and outstanding IR detection capability ch.racterized by a 44%increase in resistance wh.n exposed to 250 W IR *** multifunctional MXene/CNT Janus film offers a feasible solution for electromagnetic sh.elding and IR sh.elding/detection under ch.llenging conditions.

关键词： MXene/carbon nanotube Janus film Electromagnetic interference sh.elding Infrared sh.elding Th.rmal camouflage Infrared detection

Surface-functionalized h.le-selective monolayer for h.gh.efficiency single-junction wide-bandgap and monolith.c tandem perovskite solar cells

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Journal of Energy Ch.mistry 2024年第1期88卷 317-326,I0008页

作者： Devth.de Vidyasagar Yeongh.n Yun Jae Yu cho h.emin Lee Kyung Won Kim Yong Tae Kim Sung Woong Yang Jina Jung Won Ch.ng choi Seonu Kim Rajendra Kumar Gunasekaran Seok Beom Kang Kwang h.o Dong h.e Kim Jaeyeong h.o Sangwook Lee School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Department of Materials Science and Engineering and Optoelectronics Convergence Research CenterChonnam National UniversityGwangju 61186Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea Department of Nanotech.ology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea

Carbazole moiety-based 2PACz([2-(9h.carbazol-9-yl)eth.l]ph.sph.nic acid)self-assembled monolayers(SAMs)are excellent h.le-selective contact(h.C)materials with.abilities to excel th. ch.rge-transferdynamics of perovskite solar cells(PSCs).h.rein,we report a facile but powerful meth.d to functionalize th. surface of 2PACz-SAM,by wh.ch.reproducible,h.gh.y stable,h.gh.efficiency wide-bandgap PSCs can be *** 2PACz surface treatment with.various donor number solvents improves assembly of 2PACz-SAM and leave residual surface-bound solvent molecules on 2PACz-SAM,wh.ch.increases perovskite grain size,retards h.lide segregation,and accelerates h.le *** surface functionalization ach.eves a h.gh.power conversion efficiency(PCE)of 17.62%for a single-junction wide-bandgap(~1.77 e V)*** also demonstrate a monolith.c all-perovskite tandem solar cell using surfaceengineered h.C,sh.wing h.gh.PCE of 24.66%with.large open-circuit voltage of 2.008 V and h.gh.fillfactor of 81.45%.Our results suggest th.s simple approach.can furth.r improve th. tandem device,wh.n coupled with.a h.gh.performance narrow-bandgap sub-cell.

关键词： Perovskite solar cells 2PACz Monolith.c tandem solar cells Wide bandgap