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Effects of Stress, Depression, and Problem Drinking on Suicidal Ideation among Korean Workers

International Journal of Mental Health Promotion 2021年第2期23卷 189-199页

作者： Yun-Jung choi mi-ra Won Youn-Joo Um Red Cross College of Nursing Chung-Ang UniversitySeoulKorea Department of Nursing Daewon University CollegeJecheonKorea Graduate School of Nursing Chung-Ang UniversitySeoulKorea

The mental health of workers is an important issue that affects not only individuals and their families but also workplaces and ***,it is necessary to regularly evaluate and analyze workers’mental health status,including levels of stress,depression,and addictive behaviors to apply thesefindings in creating mental health promotion *** study aims to provide basic data that would facilitate early intervention for workers’mental health problems by analyzing factors such as stress,depression,and problem drinking that can affect suicidal *** April 15 to October 25,2019,a survey was conducted with 165 workers across six workplaces in a Korean *** was performed using descriptive statistics,correlation,and simple and multiple regression analyses using the R statistics program *** was no difference in suicidal ideation scores based on the participants’general characteristics,while there was a significant positive correlation among stress,depression,problem drinking,and suicidal *** addition,severe depression,severe stress,and severe problem drinking had significant effects on suicidal ideation,and among the subitems of stress,somatic symptoms had an effect on suicidal *** addition,severe stress,somatic symptoms,depression,and severe problem drinking had a significant effect on suicidal ideation in males but not in *** is necessary to identify the effects of stress,depression,drinking problems,and suicide on workers’mental health,and evaluate their mental health systemati-cally and regularly to recognize whether active psychiatric treatment and nursing intervention are necessary as well as preventive *** addition,it is meaningful to pay attention to the suicide ideation of adult workers and provide basic data to promote systematic public health policies on mental health.

关键词： Alcohol depression mental health stress suicidal ideation

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Efficacy of a Community-Based Trauma Recovery Program after a Fire Disaster

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International Journal of Mental Health Promotion 2022年第1期24卷 85-94页

作者： Yun-Jung choi mi-Ra Won Dong-Hee Cho Red Cross College of Nursing Chung-Ang UniversitySeoulKorea Department of Nursing Daewon University CollegeJecheonKorea

As industries develop,fire disasters and their associated damage are *** the mental health of victims is imperative because this is an essential issue for community recovery after a *** study was conducted to determine the efficacy of a program implemented by a community mental health center based on the investigation of the victims’depression and post-traumatic stress disorder(PTSD)levels immediately after the disaster and at one-year *** a result,victims’depression and PTSD recovered over time,and more changes were *** particular,the high-risk group for PTSD showed a high program participation rate,and there was significant recovery over time compared with the group without *** on these results,community mental health programs are an effective way to increase community mental health after *** the future,community-based recovery programs after disasters should be expanded,and administrative support for them should be developed.

关键词： Fire disaster victims post-traumatic stress disorder depression community mental health services

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Nanocomposite quasi-solid-state electrolyte for high-safety lithium batteries

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Nano Research 2017年第9期10卷 3092-3102页

作者： hyunji choi hyun Woo Kim Jae-Kwang Kim Young Jun Lim Youngsik Kim Jou-Hyeon Ahn School of Energy & Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 689-798 Republic of Korea Department of Solar & Energy Engineering Cheongju University Cheongju Chungbuk 28503 Republic of Korea School of Energy & Chemical Engineering and Research Institute for Green Energy Convergence Technology Gyeongsang National University 900 Gajwa-dong Jinju 660-70 I Republic of Korea

Rechargeable lithium batteries are attractive power sources for electronic devices and are being aggressively developed for vehicular use. Nevertheless, problems with their safety and reliability must be solved for the large-scale use of lithium batteries in transportation and grid-storage applications. In this study, a unique hybrid solid-state electrolyte composed of an ionic liquid electrolyte (LiTFSI/Pyr14TFSI) and BaTiO3 nanosize ceramic particles was prepared without a polymer. The electrolyte exhibited high thermal stability, a wide electrochemical window, good ionic conductivity of 1.3 × 10−3 S·cm−1 at 30 °C, and a remarkably high lithium-ion transference number of 0.35. The solid-state LiFePO4 cell exhibited the best electrochemical properties among the reported solid-state batteries, along with a reasonable rate capability. Li/LiCoO2 cells prepared using this nanocomposite solid electrolyte exhibited high performance at both room temperature and a high temperature, confirming their potential as lithium batteries with enhanced safety and a wide range of operating temperatures.

关键词： nanocomposition solidified ionic liquid shell charge space safety lithium battery

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Diverse Functions of VDUP1 in Cell Proliferation,Differentiation,and Diseases

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Cellular & Molecular Immunology 2007年第5期4卷 345-351页

作者： Sang Yong Kim hyun-Woo Suh Jin Woong Chung Suk-Ran Yoon Inpyo choi Stem Cell Research Center Korea Research Institute of Bioscience and BiotechnologyYusongTaejon 305-333Republic of Korea

Vitamin D3 up-regulated protein 1 （VDUP1） is a multifunctional protein involved in maintaining cellular homeostasis. VDUP1 is induced by a variety of stresses. Inversely, VDUP1 is often reduced in various tumor tissues and cell lines. Over-expression of VDUP1 inhibits cell proliferation through cell cycle arrest. VDUP1 interacts with thioredoxin （Trx） and negatively regulates the expression and antioxidant function of Trx which is involved in redox regulation. VDUP1/ mice are more susceptible to carcinogenesis than wild-type mice and are defective in establishing immune system induding the development and function of natural killer cells. Furthermore, VDUP1^-/- mice show impaired Kreb cycle-mediated fatty acid utilization. In this review, we have discussed the multifunctional roles of VDUP1 in diverse cellular responses, in particular its relation to proliferation, apoptosis, differentiation, and diseases such as cancer and stress-related diseases.

关键词： VDUP1 thioredoxin proliferation immune cell

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Changes and development plans in the mountain villages of South Korea:Comparison of the first and second national surveys

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Journal of Mountain Science 2017年第8期14卷 1473-1489页

作者： Hag Mo KANG hyun KIM Chang Heon LEE Chong Kyu LEE Soo Im choi Department of Forest Environmental Science Chonbuk National University Jeollabuk-do Forest Environment Research Institute Department of Forest Resources Gyeongnam National University of Science and Technology Department of Forest Resources Sunchon National University

Owing to the geographic disadvantages of mountain villages, the social, cultural, and economic conditions of mountain villagers are inferior to those of urban dwellers in South Korea. Thus, in 1995, the The government of South Korea launched a mountain village development support program to promote agriculture and forestry, balance national land development, and preserve cultural heritage. The program was effectively implemented, improving the income, population size, and living conditions of villagers in addition to setting up a system for stable project implementation. However, concerns were raised about long-term development planning, the creation and marketing of specialty brands, facility management/operation, and follow-up support. The government conducted surveys of mountain villagers in 2003 and 2014, obtaining basic data to address these issues. This study evaluates the outcomes of these two surveys, suggesting areas requiring focusedaction, concentrating on village development projects, forest resource distribution and use, demographic trends, the economy, exchange with urban areas, green tourism, and master planning. We find that despite growth in the forest labor force, forest ownership is diminishing in terms of the number and scale of holdings. Consequently, it is necessary to commercialize forest resources, establish favorable settlement conditions, and expand government support for village-run projects. In addition, systematic forest management for older tree age classes would benefit the public and provide assets for future mountain village development. Our results are expected to provide baseline information for the establishment and efficient implementation of mountain village development policy.

关键词： Forest resources management Mountain village changes Mountain village economy Support for mountain villages Urban-rural exchange

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Fabrication of curved micro structures on photoresist layer

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Transactions of Nonferrous Metals Society of China 2011年第A1期21卷 100-103页

作者： Jae Sung YOON Tae-Jin JE Doo-Sun choi Sung Hwan CHANG Kyung-hyun WHANG Nano Mechanical Systems Research Division Korea Institute of Machinery and Materials (KIMM) Daejeon 305-343 Korea

A novel fabrication process for micro patterns with curvature was introduced. The curved structures were made by compensating rectangular micro structures with liquid photoresist layer. Because of the surface tension of the liquid in micro scale, various shapes of meniscus can he made on the micro channels. The micro channels were made on the silicon suhstrate in advance, and then the liquid layer was coated on the micro channels. From the nature of liquid behavior, the curved patterns with smooth surface are obtained, which cannot be made easily with the conventional mechanical machining, as well as with the microfabrication processes, such as wet and dry etching. With this principle, it is expected that the smooth and curved surfaces can be made by simple processes and the results can be applied widely, such as optical patterns.

关键词： micro pattern liquid layer MEMS micro channel silicon substrate

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Knot impingement after arthroscopic rotator cuff repair mimicking infection:A case report

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World Journal of Clinical Cases 2022年第15期10卷 5097-5102页

作者： Du-Han Kim Jong-Hyuk Jeon Byung-Chan choi Chul-hyun Cho Department of Orthopedic Surgery Keimyung University Dongsan HospitalKeimyung University School of MedicineDaegu 42601South Korea

BACKGROUND Knot impingement as a complication after arthroscopic rotator cuff repair(ARCR)has been suggested as a cause of persistent pain with limited *** report on a case involving a patient who developed knot impingement after ARCR who complained of acute onset of pain with limited motion,which was confused with *** SUMMARY A 55-year-old female who complained of severe pain with limited motion of the right shoulder visited our emergency *** range of motion could not be evaluated due to the patient’s severe *** patient had undergone ARCR using a suture-bridge technique at a local clinic four months ago for treatment of a small supraspinatus tear of the right *** erosive change of the undersurface of the acromion was observed on plain radiographs of the right shoulder,and a moderate amount of bursal fluid and synovial thickening with enhancement was observed by magnetic resonance *** of an analysis of the aspirated fluid showed that the WBC count was 3960 with 90% *** arthroscopic view showed healing of the repaired supraspinatus tendon and loose suture threads and knots with severe subacromial bursitis were *** of inflammatory tissues of the glenohumeral joint and subacromial space was performed for the removal of all suture *** patient’s symptoms subsided immediately after the surgical *** Although the incidence of knot impingement is rare,the possibility of knot impingement after ARCR should be a consideration.

关键词： Rotator cuff Knot impingement Shoulder Infection Arthroscopy Case report

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Radar Data Assimilation for the Simulation of Mesoscale Convective Systems

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Advances in Atmospheric Sciences 2010年第5期27卷 1025-1042页

作者： Jo-Han LEE hyun-Ha LEE Yonghan choi hyung-Woo KIM Dong-Kyou LEE School of Earth and Environmental Sciences Seoul National University

A heavy rainfall case related to Mesoscale Convective Systems （MCSs） over the Korean Peninsula was selected to investigate the impact of radar data assimilation on a heavy rainfall forecast. The Weather Research and Forecasting （WRF） three-dimensional variational （3DVAR） data assimilation system with tuning of the length scale of the background error covariance and observation error parameters was used to assimilate radar radial velocity and reffectivity data. The radar data used in the assimilation experiments were preprocessed using quality-control procedures and interpolated/thinned into Cartesian coordinates by the SPRINT/CEDRIC packages. Sensitivity experiments were carried out in order to determine the optimal values of the assimilation window length and the update frequency used for the rapid update cycle and incremental analysis update experiments. The assimilation of radar data has a positive influence on the heavy rainfall forecast. Quantitative features of the heavy rainfall case, such as the maximum rainfall amount and Root Mean Squared Differences （RMSDs） of zonal/meridional wind components, were improved by tuning of the length scale and observation error parameters. Qualitative features of the case, such as the maximum rainfall position and time series of hourly rainfall, were enhanced by an incremental analysis update technique. The positive effects of the radar data assimilation and the tuning of the length scale and observation error parameters were clearly shown by the 3DVAR increment.

关键词： WRF 3DVAR 3DVAR cycling initialization tuning heavy rainfall radar data

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Flux Optimization During Tapping in BOF Process

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Journal of Iron and Steel Research International 2011年第S2期18卷 148-152页

作者： hyun-Seo PARK Sung-Mo SEO Ji-Tae KWON Joo choi Steelmaking Research Group POSCO Technical Research Laboratories 699 Gumho-dong Gwangyang-si Jeonnam 545-090 Korea Technology development team plate rolling department Gwangyang Steelworks POSCO Gumho-dong Gwangyang-si Jeonnam 545-711 Korea

An integrated Plate mill has started it’s operation on July 7, 2010 in Gwangyang Steelworks, POSCO. The production capability is about 2.5 million tons per year and the main stream consists of Blast Furnace, Hot metal pretreatment (KR), Converter, Bubbling Station, RH/VTD and Continuous Casting. Particularly, it is possible to control sulfur concentration at excellent level in BOF without any further treatment in LF or VTD, which is attained by unique KR process and scrap usage strategy in BOF. In this paper, desulfurization efficiency and steel cleanliness was introduced by optimizing flux amount during tapping in BOF process. In addition, the effect of the flux addition on the refractory of ladle was investigated based on EPMA analyses with the viewpoint of phase diagram. The cleanliness of each sample was examined using optical emission spectrometry and oxygen nitrogen determinator.

关键词： plate mill steel cleanliness flux tapping

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Docurity: A New Cryptographic Primitive for Collaborative Cloud Systems

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Intelligent Automation & Soft Computing 2023年第6期36卷 3725-3742页

作者： Byeori Kim minseong choi Taek-Young Youn Jeong hyun Yi Haehyun Cho Soongsil University Seoul06978Korea Dankook University Yongin16890Korea

Recently,there has been a sudden shift from using traditional office applications to the collaborative cloud-based office suite such as microsoft Office *** cloud-based systems allow users to work together on the same docu-ment stored in a cloud server at once,by which users can effectively collaborate with each ***,there are security concerns unsolved in using cloud *** of the major concerns is the security of data stored in cloud ser-vers,which comes from the fact that data that multiple users are working together cannot be stored in encrypted form because of the dynamic characteristic of cloud *** this paper,we propose a novel mode of operation,DL-ECB,for AES by which we can modify,insert,and delete the ciphertext based on changes in ***,we can use encrypted data in collaborative cloud-based *** demonstrate that the DL-ECB mode can preserve the confidential-ity,integrity,and auditability of data used in collaborative cloud systems from adversaries,we implement and evaluate the prototype of the DL-ECB mode.

关键词： Cloud collaboration mode of operation auditability of ciphertext

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