检索结果-南通市图书馆

Surface-area-tuned, quantum-dot-sensitized heterostructured nanoarchitectures for highly efficient photoelectrodes

在线全文

学校读者我要写书评

暂无评论

Nano Research 2014年第1期7卷 144-153页

作者： Sangbaek park Donghoe Kim Chan Woo Lee Seong-Deok Seo Hae jin Kim Hyun soo Han Kug Sun Hong Dong-Wan Kim Department of Materials Science and Engineering Seoul National University Seou1151-744 Republic of Korea Department of Energy Systems Research and Department of Materials Science and Engineering Ajou University Suwon 443-749 Republic of Korea

Harvesting solar energy to produce clean hydrogen from photoelectrolysis of water presents a valuable opportunity to find alternatives for fossil fuels. Three- dimensional nanoarchitecturing techniques can afford enhanced photoelectrochemical properties by improving geometrical and structural effects. Here, we report quantum-dot sensitized TiO2-Sb：SnO2 heterostructures as a model electrode to enable the optimization of the structural effects through the creation of a highly conductive pathway using a transparent conducting oxide （TCO）, coupled with a high surface area, by introducing branching and low interfacial resistance via an epitaxial relationship. An examination of various morphologies （dot, rod, and lamella shape） of TiO2 reveals that the rod-shaped TiO2-Sb：SnO2 is a more effective structure than the others. A photoelectrode fabricated using optimized CdS--TiO2-Sb：SnO2 produces a photocurrent density of 7.75 mA/cm2 at 0.4 V versus a reversible hydrogen electrode. These results demonstrate that constructing a branched heterostructure based on TCO can realize highperformance photoelectrochemical devices.

关键词： photoelectrochemical hydrogen evolution antimony-doped tinoxide TiO2 quantum dot

Effect of Sub-T_g Annealing on the Corrosion Resistance of the Cu–Zr Amorphous Alloys

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2018年第3期31卷 273-280页

作者： Sang-soo Shin Hong-Kyu Kim Jae-Chul Lee Ik-Min park Department of Materials Science and Engineering Pusan National University Advanced Analysis Center Korea Institute of Science and Technology Department of Materials Science and Engineering Korea University

Despite the economy of material cost and excellent toughness of Cu-based amorphous alloys,especially CusoZrso,their poor corrosion resistance to a chloride medium limits their widespread *** this study,corrosion tests were performed on the CusoZrso amorphous alloy with different degrees of short-range order,which were prepared by annealing below the glass transition temperature（Tg）.It was found that the corrosion resistance of amorphous alloys is improved to a significant level when the alloys were heated below *** studies showed that thermally activated relaxation process of created disorder,which occurs during sub-Tg annealing,is responsible for the improvement in the corrosion *** dynamics simulations performed on the Cu-Zr amorphous alloys demonstrated that the relaxation process of the alloys is associated with the formation of energetically stable icosahedra and icosahedron-like *** study highlights the effects of sub-Tg annealing on the improvement in the corrosion resistance of the amorphous alloys from the viewpoint the relaxation process of the short-range orders.

关键词： Amorphous alloys Corrosion Annealing Molecular dynamics Electrochemical performance

Characteristics of machined surface controlled by cutting tools and conditions in machining of brittle material

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2009年第B09期19卷 194-201页

作者： Yong-Woo KIM soo-Chang CHOI Jeung-Woo park Deug-Woo LEE Department of Nano Fusion Technology Pusan National University Department of Mechanical Design Engineering Chosun University Department of Nanosystem and Nanoprocess Engineering Pusan National University

One of the ultra-precision machining methods was adapted for brittle material as well as soft material by using multi-arrayed diamond tips and high speed spindle. Conventional machining method is too hard to control surface roughness and surface texture against brittle material because the particles of grinding tools are irregular size and material can be fragile. Therefore, we were able to design tool paths and machine controlled pattern on surface by multi-arrayed diamond tips with uniform size made in MEMS fabrication and high speed spindle, and the maximum speed was about 3×105 r/min. We defined several parameters that can affect the machining surface. Those were multi-array of diamond tips (n×n), speed of air spindle and feeding rate. The surface roughness and surface texture can be controlled by those parameters for micro machining.

关键词：加工表面脆性材料条件控制刀具路径表面粗糙度特征高速主轴加工方法

Dynamic modeling and analysis of vortex filament motion using a novel curve-fitting method

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2016年第1期29卷 53-65页

作者： Chang-Joo Kim soo Hyung park Sang Kyung Sung Sung-Nam Jung Department of Aerospace Information Engineering Konkuk UniversitySeoul 05029Republic of Korea

Applications of a novel curve-fitting technique are presented to efficiently predict the motion of the vortex filament, which is trailed from a rigid body such as wings and rotors. The gov- erning equations of the motion, when a Lagrangian approach with the present curve-fitting method is applied, can be transformed into an easily solvable form of the system of nonlinear ordinary dif- ferential equations. The applicability of Bezier curves, B-spline, and Lagrange interpolating polyno- mials is investigated. Local Lagrange interpolating polynomials with a shift operator are proposed as the best selection for applications, since it provides superior system characteristics with minimum computing time, compared to other methods. In addition, the Gauss quadrature formula with local refinement strategy has been developed for an accurate prediction of the induced velocity computed with the line integration of the Biot-Savart law. Rotary-wing problems including a vortex ring problem are analyzed to show the efficiency, accuracy, and flexibility in the applications of the pro- posed method.

关键词： Aerodynamics Biot-Savart law Curve-fitting method Free-vortex wake Rotary wing Vortex filament

Successful endoscopic submucosal dissection of a giant polyp in a 21-month-old female

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第1期20卷 323-325页

作者： Eun-Young Jung soon-Ok Choi Kwang Bum Cho Eun soo Kim Kyung Sik park jin-Bok Hwang Department of Pediatric Surgery Division of Gastroenterology and HepatologyKeimyung University School of MedicineDaegu 700-712South Korea Department of Internal Medicine Division of Gastroenterology and HepatologyKeimyung University School of MedicineDaegu 700-712South Korea Division of Gastroenterology and Hepatology Department of PediatricsKeimyung University School of MedicineDaegu 700-712South Korea

Endoscopic submucosal dissection(ESD)is now recognized as the preferred treatment modality for gastrointestinal epithelial lesions.A 21-month-old female was admitted with a giant hyperplastic polyp causing a gastric outlet *** ESD was performed with *** post-procedural course was uneventful without a bleeding *** further study of the feasibility of ESD in early children is necessary,ESD could be applied to avoid laparotomy even in young children.

关键词： Obstruction Endoscopic submucosal dissection Infant Hyperplastic polyp

Inhibitory effects of coronary vasodilator papaverine on heterologously-expressed HERG currents in Xenopus oocytes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Pharmacologica Sinica 2007年第4期28卷 503-510页

作者： Cuk-seong KIM Nam LEE sook-jin SON Kyu-seung LEE Hyo-shin KIM Yong-geun KWAK soo-wan CHAE Sang-do LEE Byeong-hwa JEON jin-bong park Department of Physiology College of MedicineChungnam National UniversityDaejeon 301131Korea Department of Pharmacology Chonbuk National UniversityMedical SchoolChonju 561-180Korea

Aim:To characterize the effects of papaverine on HERG channels expressed inXenopus oocytes as well as cardiac action potential in rabbit ventricular ***:Conventional microelectrodes were used to record action potential inrabbit ventricular *** currents were recorded by 2-electrode voltageclamp technique in Xenopus oocytes injected with HERG ***:Papa-verine increased the cardiac action potential duration in rabbit ventricular *** blocked heterologously-expressed HERG currents in a concentration-depen-dent manner (IC5071.03±4.75 μmol/L,NH 0.80,n=6),whereas another phosphodi-esterase inhibitor,theophylline （500 μmol/L）,did *** blockade of papaverineon HERG currents was not *** slope conductance measuredas a slope of the fully activated HERG current-voltage curves decreased from78.03±4.25 μS of the control to 56.84±5.33,36.06±6.53,and 27.09±5.50 μS （n=4） by30,100,and 300 μmol/L of papaverine,*** （100 μmol/L）caused a 9 mV hyperpolarizing shift in the voltage-dependence of steady-stateinactivation,but there were no changes in the voltage-dependence of HERG cur-rent *** blocked HERG channels in the closed,open,andinactivated ***:These results showed that papaverine blockedHERG channels in a voltage-and state-independent manner,which may mostlikely be the major mechanism of papaverine-induced cardiac arrhythmia reportedin humans.

关键词： papaverine HERG cardiac action potential

The current status of hormone treatment for prostate cancer patients in Korean real-world practice:a multi-institutional observational study

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2019年第2期21卷 115-120页

作者： Jung Kwon Kim Jung Jun Kim Taek Won Gang Tae Kyun Kwon Hong Sup Kim Seung Chui park Jae-Shin park Jong-Yeon park Seok Joong Yoon Youn-soo Jeon jin Seon Cho Kwan Joong Joo Sung-Hoo Hong Seok-soo Byun the Korean Urological Oncology Society Department of Urology Seoul National University Bundang HospitalSeongnam 13620Korea Department of Urology Hallym University Sacred Heart HospitalAnyang 14068Korea Department of Urology Kangbuk Samsung HospitalSeoul 03181Korea Department of Urology Seoul St.Mary HospitalSeoul 06591Korea 不详 Department of Urology Chonnam National University HospitalGwangju 61469Korea School of Medicine Kyungpook National University Medical CenterDaegu 41404Korea Department of Urology Konkuk University Medical CenterSeoul 05080Korea Department of Urology Wonkwang University HospitalIksan 54538Korea Department of Urology Daegu Catholic University Medical CenterDaegu 41911Korea Department of Urology Ulsan UniversityGangneung Asan HospitalGangneung 25440Korea Department of Urology Chungbuk National University HospitalCheongju 28644Korea Department of Urology Soonchunhyang University HospitalCheonan 31151Korea

We aimed to evaluate the current nationwide trend,efficacy,safety,and quality of life(QoL)profiles of hormone treatment in real-world practice settings for prostate cancer(PCa)patients in Korea.A total of 292 men with any biopsy-proven PCa(TanyNanyMany)from 12 institutions in Korea were included in this multi-institutional,observational study of prospectively collected *** luteinizing hormone-releasing hormone(LHRH)agonists were allowed to be investigational *** was defined as(1)the rate of castration(serum testosterone≤50 ng dl^-1)at 4-week visit and(2)breakthrough(serum testosterone>50 ng dl^-1 after castration).Safety assessments included routine examinations for potential adverse events,laboratory tests,blood pressure,body weight,and bone min era I density(BMD,at baseli ne and at the last follow-up visit).QoL was assessed using the Expa nded Prostate Cancer Index Composite-26(EPIC-26).The most comm on initial therapeutic regimen was LHRH agonist with an ti-androge n(78.0%),and the most commonly used LHRH agonist for combination and mono therapy was leuprolide(64.0%for combi natio n and 58.0%for monotherapy).The castration and breakthrough rates were 78.4%and 6.6%,*** laboratory results related to dyslipidemia worsened after 4 weeks of hormone *** addition,the mean BMD T-score was significantly lower at the last follow-up(mean:-1.950)compared to baseline(mean:-0.195).The mean total EPIC-26 score decreased from 84.8(standard deviation[s.d.]:12.2)to 78.3(s.d.:8.1),with significant deterioration only in the urinary domain(mean:23.5 at baseli ne and 21.9 at the 4-week visit).These findi ngs dem on strate the n ationwide trend of current practice setti ngs in hormone treatment for PCa in Korea.

关键词： efficacy hormonal treatment Korean population prostate cancer safety trend

The effectiveness of emotion-focused art therapy on the resilience and self-image of emergency physicians

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Emergency Medicine 2022年第6期13卷 479-484页

作者： soo Kyung Eo Chanwoong Kim Kyung Hye park Eun Kyung Eo Graduate School of Art Therapy at CHA University Pocheon 11160Republic of Korea Department of Emergency Medicine Chung-Ang University College of MedicineSeoul 06974Republic of Korea Department of Medical Education Yonsei University Wonju College of MedicineWonju 26426Republic of Korea Department of Emergency Medicine Wonju Severance Christian HospitalWonju 26426Republic of Korea Department of Emergency Medicine Soonchunhyang University Bucheon HospitalBucheon 14584Republic of Korea

INTRODUCTION Resilience refers to the quality of being able to overcome adversity.[1]Studies conducted in the United States[2]and China[3]following the 2019 coronavirus disease(COVID-19)pandemic reported reduced resilience levels among medical *** resilience levels are associated with low burnout levels among residents.[4]Physician burnout affects patients’safety and quality of care.[5]In particular,emergency physicians(EPs)are more prone to exhaustion or poor resilience,as their turnover intention tends to be higher.[6]Therefore,improving EPs’resilience is imperative.

关键词： image physician overcome

ASpediaFI:Functional Interaction Analysis of Alternative Splicing Events

在线全文

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2022年第3期20卷 466-482页

作者： Kyubin Lee Doyeong Yu Daejin Hyung soo Young Cho Charny park Bioinformatics Branch Research InstituteNational Cancer CenterGoyang 10408Republic of Korea

Alternative splicing(AS)regulates biological processes governing phenotypes and *** AS(DAS)gene test methods have been developed to investigate important exonic expression from high-throughput ***,the DAS events extracted using statistical tests are insufficient to delineate relevant biological *** this study,we developed a novel application,Alternative Splicing Encyclopedia:Functional Interaction(ASpediaFI),to systemically identify DAS events and co-regulated genes and *** establishes a heterogeneous interaction network of genes and their feature nodes(i.e.,AS events and pathways)connected by coexpression or pathway gene set ***,ASpediaFI explores the interaction network using the random walk with restart algorithm and interrogates the proximity from a query gene ***,ASpediaFI extracts significant AS events,genes,and *** evaluate the performance of our method,we simulated RNA sequencing(RNA-seq)datasets to consider various conditions of sequencing depth and sample *** performance was compared with that of other ***,we analyzed three public datasets of cancer patients or cell lines to evaluate how well ASpediaFI detects biologically relevant *** exhibits strong performance in both simulated and public *** integrative approach reveals that DAS events that recognize a global co-expression network and relevant pathways determine the functional importance of spliced genes in the *** is publicly available at https://***/packages/ASpediaFI.

关键词： Alternative splicing RNA-seq Heterogeneous interaction network Random walk with restart Gene set enrichment analysis