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International Journal of Disaster Risk Science 2022年第2期13卷 190-198页

作者： Seong-Jin Lee joong-hoo park Seung-Min Cha Donghyun Kim Department of Public Policy and Management.Pusan National University Busan 46241South Korea Department of Urban Planning and Engineering Pusan National UniversityBusan 46241South Korea

The coronavirus disease 2019(COVID-19) is a global pandemic that has heavily impacted not only the health sector, but also the economic sector in *** countries have projected a negative economic impact, and the effect on micro-, small-, and medium-sized enterprises(MSMEs) is predicted to be significantly *** study estimated the regional resistance of MSME sales revenues and identified the regional economic factors that affect resistance by analyzing South Korea, a country with one of the lowest economic impact projections from COVID-19. Resistance was estimated by comparing sales revenues and changes in resistance observed during the early COVID-19 period to those recorded in the same weeks(weeks 6 to 9) of 2019. The factors that affect regional resistance were determined by conducting robust regression and spatial regression analyses. The results show that the number of confirmed COVID-19 cases, a direct risk factor, is negatively related to regional resilience, while diversity is positively related to regional resistance. To improve the regional resistance against uncertain events, this study recommends increased diversity among regional industrial structures to reduce the duration of the early shock of an unexpected adverse event.

关键词： COVID-19 Economic resistance MSMEs South Korea

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

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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

Employment of encapsulated Si with mesoporous TiO_2 layer as anode material for lithium secondary batteries

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中国有色金属学会会刊：英文版 2009年第4期19卷 1023-1026页

作者： Sang-Eun park Bo-Eun KIM Sang-Wha LEE joong-Kee LEE Advanced Energy Materials Processing Laboratory Korea Institute of Science and Technology Department of Chemical & Bio Engineering Kyungwon University

Silicon composite of nano-capsule type is newly applied as an active anode material for lithium ion ***2-encapsulated silicon powders were synthesized by a sol-gel reaction with titanium *** nanoparticles were successfully embedded into porous titanium oxide capsules that played as a buffer layer against drastic volume changes of silicon during the charge-discharge cycling,consequently leading to the retardation of the capacity fading of intrinsic silicon *** electrochemical and structural properties of silicon nanocomposites with different surface areas of encapsulating TiO2 layer were characterized by X-ray diffraction(XRD),nitrogen gas adsorption analysis by the Brunauer-Emmett-Teller(BET) equation,transmission electron microscopy(TEM),and galvanostatic charge-discharge experiments.

关键词：二氧化钛硅材料锂二次电池负极材料封装纳米复合材料透射电子显微镜就业

EFFECT OF FABRICATION ON HIGH CYCLE FATIGUE PROPERTIES OF COPPER THIN FILMS

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Acta Mechanica Solida Sinica 2008年第4期21卷 318-326页

作者： Jun-Hyub park joong-Hyok An Yun-Jae Kim Hyeon-Chang Choi Department of Mechatronics Engineering College of EngineeringTongmyong University535Yongdang-DongNam-GuBusan608-711Korea Department of Mechanical Engineering College of EngineeringKorea UniversityAnam-dong Seongbuk-GuSeoul136-701Korea

The influence of fabrication on the tensile and fatigue behavior of copper films manufactured by 3 kinds of fabrication methods was investigated. The tensile and high cycle fatigue tests were performed using the test machine developed by authors. Young＇s moduli （72, 71 and 69 GPa, respectively） are lower than the literature values （108-145 GPa）, while the yield strengths were as high as 358, 350 and 346 MPa, respectively and the ultimate strengths as 462, 456 and 446 MPa, respectively. There is not much difference in the tensile properties of the 3 kinds of films. There is little difference in the fatigue properties of the 3 kinds of films but one of them has shorter fatigue life than others in high cycle region and longer fatigue life than others in low cycle region.

关键词： mechanical properties thin film copper high cycle fatigue test

Optical Gain Analysis of Graded InGaN/GaN Quantum-Well Lasers

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Chinese Physics Letters 2011年第7期28卷 319-322页

作者： Seoung-Hwan park Yong-Tae Moon Jeong Sik Lee Ho Ki Kwon joong Seo park Doyeol Ahn Department of Electronics Engineering Catholic University of DaeguHayangKyeongsanKyeongbuk 712-702Republic of Korea SLED R&D Center LG Innotek16 Woomyeon-dongSeocho-guSeoul 137-140Republic of Korea Department of Electrical and Computer Engineering University of SeoulSeoul 130-743Republic of Korea

Optical properties of graded InGaN/GaN quantum well(QW)lasers are analyzed as improved gain media for laser diodes emitting near 500 *** results are compared with those of conventional InGaN/GaN QW *** heavy-hole effective mass around the topmost valence band is found to nearly not be affected by the inclusion of the graded *** graded InGaN/GaN QW structure shows a much larger matrix element than the conventional InGaN/GaN QW *** radiative current density dependences of the optical gain are similar to each ***,the graded QW structure is expected to have lower threshold current density than the conventional QW structure because the former has a lower threshold carrier density than the latter.

关键词： InGaN/GaN graded Lasers

Characteristics of Atmospheric Circulation Associated with Cold Surge Occurrences in East Asia:A Case Study During 2005/06 Winter

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Advances in Atmospheric Sciences 2008年第5期25卷 791-804页

作者： Tae-Won park Jee-hoon JEONG Chang-Hoi HO Seong-joong KIM School of Earth and Environmental Sciences Seoul National University Seoul Korea Department of Earth Sciences University of Gothenburg Gothenburg Sweden Korea Polar Research Institute Incheon Korea

The characteristics of the upper-level circulation and thermodynamical properties for the period when two distinct cold surges broke out over East Asia during the 2005/06 winter are investigated. From early December 2005 to early January 2006, exceptionally cold weather lasted for approximately one month due to two successive cold surges that took place on 2 December 2005 and 2 January 2006, respectively. This study reveals that both involve the upper-tropospheric circulation, which induces the amplification and expansion of the surface Siberian high toward East Asia, but arose from different causes： the former is caused by the upper-level blocking originated from the North Pacific and the latter is caused by the upper-level wave train across the Eurasian Continent. In particular, it is suggested that the lower-tropospheric anomalous wind caused by upper-level circulation anomalies and a steep meridional temperature gradient amplified by phase-locked annual cycle combined to induce very strong cold advection in East Asia, which resulted in exceptionally cold weather that lasted for several weeks. The present results emphasize that the characteristics of the upper-tropospheric circulation can be considered as important precursors to cold surge occurrences in East Asia.

关键词： cold surge Siberian high East Asia East Asian winter monsoon upper-tropospheric circulation

Hepatic cyst misdiagnosed as a gastric submucosal tumor:A case report

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World Journal of Gastroenterology 2008年第19期14卷 3092-3094页

作者： joong-Min park Jin Kim Ho-Il Kim Chong-Suk Kim Department of Surgery Korea University College of Medicine

We describe here a case of 51-year-old woman with a symptomatic hepatic cyst that was misdiagnosed as a gastric submucosal tumor (SMT) with endoscopic ultrasound (EUS) and CT scan. The patient presented with an epigastric pain for two months. On endoscopy, a submucosal tumor was found on the cardia of the stomach. Based on EUS and abdominal CT scan, the lesion was diagnosed as a gastric duplication cyst or a gastrointestinal stromal tumor (GIST). The operative plan was laparoscopic wedge resection for the GIST of the gastric cardia. A cystic mass arising from the left lateral segment of the liver was found at the laparoscopic examination. There was no abnormal finding at the gastric cardia. She was treated by laparoscopic hepatic wedge resection including the hepatic cyst using an endoscopic linear stapler.

关键词： Hepatic cyst Submucosal tumor Stomach

Comparing upper gastrointestinal X-ray and endoscopy for gastric cancer diagnosis in Korea

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World Journal of Gastroenterology 2010年第2期16卷 245-250页

作者： hoo-Yeon Lee Eun-Cheol park Jae Kwan Jun Kui Son Choi Myung-Il Hahm National Cancer Control Research Institute National Cancer Center111 Jungbalsan-roIlsandong-guGoyang-si Gyeonggi-do 410-769South Korea Department of U-Healthcare Management College of Medical ScienceSoonChunHyang University646 Eupnae-riShinchang-myeonAsan-siChungnam 336-745 South Korea

AIM:To compare the cost and accuracy of upper gastrointestinal(GI)X-ray and upper endoscopy for diagnosis of gastric cancer using data from the 2002-2004 Korean National Cancer Screening Program(NCSP). METHODS:The study population included 1 503 646 participants in the 2002-2004 stomach cancer screening program who underwent upper GI X-ray or *** accuracy of screening was defined as the probability of detecting gastric *** calculated the probability by merging data from the NCSP and the Korea Central Cancer *** estimated the direct costs of the medical examination and the tests for up- per GI X-ray,upper endoscopy,and biopsy. RESULTS:The probability of detecting gastric cancervia upper endoscopy was 2.9-fold higher than via upper GI *** unit costs of screening using upper GI X-ray and upper endoscopy were$32.67 and$34.89, *** 2008,the estimated cost of identifying one case of gastric cancer was$53094.64 using upper GI X-ray and$16 900.43 using upper *** cost to detect one case of gastric cancer was the same for upper GI X-ray and upper endoscopy at a cost ratio of 1:3.7. CONCLUSION:Upper endoscopy is slightly more costly to perform,but the cost to detect one case of gastric cancer is lower.

关键词： Gastric cancer Mass screening Endoscopy Early diagnosis X-ray diagnosis

Stable Zn Metal Anodes with Limited Zn-Doping in MgF_(2) Interphase for Fast and Uniformly Ionic Flux

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Nano-Micro Letters 2022年第3期14卷 169-183页

作者： Ji Young Kim Guicheng Liu Ryanda Enggar Anugrah Ardhi Jihun park Hansung Kim joong Kee Lee Energy Storage Research Center Korea Institute of Science and TechnologyHwarang‑ro 14‑gil 5Seongbuk‑guSeoul 02792Republic of Korea Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei‑roSeodaemun‑guSeoul 03722Republic of Korea Department of Physics Dongguk UniversitySeoul 04620Republic of Korea APC Technology 10868 Gangbyeonyeok‑ro‑4‑gilGwangjin‑guSeoul 05116Republic of Korea Department of Energy and Environmental Engineering KIST SchoolKorea University of Science and TechnologyHwarang‑ro 14‑gil 5Seongbuk‑guSeoul 02792Republic of Korea

The practical applications of aqueous Zn metal batteries are currently restricted by the inherent drawbacks of Zn such as the hydrogen evolution reaction,sluggish kinetics,and dendrite *** address these problems,herein,a limitedly Zn-doped MgF_(2)interphase comprising an upper region of pure,porous MgF_(2)and a lower region of gradient Zn-doped MgF_(2)is achieved via radio frequency sputtering *** porous MgF_(2)region is a polar insulator whose high corrosion resistance facilitates the de-solvation of the solvated Zn ions and suppression of hydrogen evolution,resulting in Zn metal electrodes with a low interfacial *** Zn-doped MgF_(2)region facilitates fast transfer kinetics and homogeneous deposition of Zn ions owing to the interfacial polarization between the Zn dopant and MgF_(2)matrix,and the high concentration of the Zn dopant on the surface of the metal substrate as fine ***,a symmetric cell incorporating the proposed Zn metal exhibits low overpotentials of~27.2 and~99.7 mV without Zn dendrites over 250 to 8000 cycles at current densities of 1.0 and 10.0 mA cm−2,*** developed Zn/MnO2 full cell exhibits superior capacity retentions of 97.5%and 84.0%with average Coulombic efficiencies of 99.96%after 1000 and 3000 cycles,respectively.

关键词： Zinc metal battery MgF_(2)layer Limited zinc doping Ion-transfer kinetic Deposition guidance

Nanograin network memory with reconfigurable percolation paths for synaptic interactions

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Light(Science & Applications) 2023年第6期12卷 1040-1050页

作者： hoo-Cheol Lee Jungkil Kim Ha-Reem Kim Kyoung-Ho Kim Kyung-Jun park Jae-Pil So Jung Min Lee Min-Soo Hwang Hong-Gyu park Department of Physics Korea UniversitySeoul 02841Republic of Korea Department of Physics Jeju National UniversityJeju 63243Republic of Korea Department of Physics Chungbuk National UniversityCheongju 28644Republic of Korea

The development of memory devices with functions that simultaneously process and store data is required for efficient *** achieve this,artificial synaptic devices have been proposed because they can construct hybrid networks with biological neurons and perform neuromorphic ***,irreversible aging of these electrical devices causes unavoidable performance *** several photonic approaches to controlling currents have been suggested,suppression of current levels and switching of analog conductance in a simple photonic manner remain ***,we demonstrated a nanograin network memory using reconfigurable percolation paths in a single Si nanowire with solid core/porous shell and pure solid core *** electrical and photonic control of current percolation paths enabled the analog and reversible adjustment of the persistent current level,exhibiting memory behavior and current suppression in this single nanowire *** addition,the synaptic behaviors of memory and erasure were demonstrated through potentiation and habituation *** habituation was achieved using laser illumination on the porous nanowire shell,with a linear decrease in the postsynaptic ***,synaptic elimination was emulated using two adjacent devices interconnected on a single ***,electrical and photonic reconfiguration of the conductive paths in Si nanograin networks will pave the way for next-generation nanodevice technologies.

关键词： electrical percolation network