Superconducting MgB2 Wire Drawing Considering Anisotropic Hardening Behavior and Hydrostatic Effect

Young‑Seok Oh,Ho Won Lee,Kook‑Chae Chung,Duck‑Young Hwang,Seong‑Hoon Kang,Jeong Whan Yoon 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7

Numerical modeling was conducted to investigate the deformation behavior of powder mixture during multi-pass drawingprocesses for multi-filamentary MgB2wire. A modified Drucker-Prager Cap (DPC) model with an elliptical cap surface usingthe new material characterization method was developed to capture the anisotropic hardening behavior and hydrostatic effectof the powder mixture. A number of uniaxial die compaction, cold isostatic pressing, diametrical compression, and uniaxialcompression tests were conducted using different powder densities to characterize the modified DPC model. A commercialfinite element software ABAQUS with a user subroutine was used to simulate the drawing of the MgB2wire. The densityand area fraction of the powder mixture during the wire-drawing process were verified with experimental results. The differencein packing density at the inner and outer filaments of the MgB2wire was successfully captured by simulation. Inaddition, the effect of the initial packing density on the superconducting properties of MgB2wire was numerically studied. It is shown that the increase in the superconducting area, which results from a high initial packing density, should be moreeffective compared to the increase in the grain connectivity in enhancing the critical current properties for the MgB2wirewhen the final packing density is saturated after a number of drawing processes.

비만환자의 전기지방분해침 시술 후 허리둘레 감소에 대한 임상적 고찰

김정환 ( Jeong Hwan Kim ),고연석 ( Youn Seok Ko ),이정한 ( Jeong Han Lee ),원재균 ( Jea Kyun Won ),신병철 ( Byung Cheul Shin ),권영달 ( Young Dal Kwon ),송용선 ( Yung Sun Song ) 한방재활의학과학회 2005 한방재활의학과학회지 Vol.15 No.3

Objectives : To see if there were any differences in waist circumference reduction when certain variable such as age, sex, BFR(BFR; Body Fat Rate), PIBW(PIBW; Percent Ideal Body Weight), WHR(WHR; Waist Hip Ratio) and BMI(BMI; Body Mass Index) were given. Methods : Among outpatients who admitted to department of Oriental Rehabilitation Medicine, Jeon-Ju Oriental Medicine Hospital, Won-kwang University from August 2003 to september 2004, 89 obese patients were chosen and electroacupunture was practiced to these groups in order to treat abdominal obesity and waist circumference reduction. Results : There were no significant correlation between sex, age and waist circumference reduction. Compared to groups who had shown lower BMI, higher BMI groups have shown greater change in waist circumference reduction. As BFR increase waist circumference reduction tended to increase as well. Conclusions : From the above results, higher BMI groups had shown greater change in waist circumference reduction compared to lower BMI groups.

자동착유시스템 설치농가의 설치 후 만족도에 관한 실태조사

기광석,김종형,정영훈,김윤호,박성재,김상범,이왕식,이현준,조원모,백광수,김현섭,권응기,김완영,여준모,Ki, Kwang-Seok,Kim, Jong-Hyeong,Jeong, Young-Hun,Kim, Yun-Ho,Park, Sung-Jai,Kim, Sang-Bum,Lee, Wang-Shik,Lee, Hyun-June,Cho, Won-Mo,Baek, Kwang- 한국축산환경학회 2011 축산시설환경학회지 Vol.17 No.1

본 시험은 국내에 도입되기 시작한 AMS에 대하여 설치 동기, 설치 후 우유생산량과우유품질, AMS 설치계기 및 설치 후 만족도, AMS 운영상 애로점 및 건의사항 등을 조사 분석하였다. 설치 계기가 무엇인가에 대한 응답비율은 노동력 부족 44%, 체험목장으로 전환 25%, 소들의 고능력화에 대응 19% 순이었으며 기타 6%였다. AMS 설치농가의 사육경력은 평균 24.9년, 평균 연령은 53.2세로 나타났으며 가족노동력만으로 경영하는 목장이 조사농가의 38%, 고용+자가노동력 형태의 목장이 63%로 나타났다. 목장의 산유능력은 두당 평균 유량은 1일 $30.9{\ell}$, 평균 유지율 3.9%, 세균수는 9.1천개/$m{\ell}$ 수준이었다. 후계자 육성에 대한 질문에 매우 그렇다라고 응답한 비율은 68%였으며, 보통 18%, 아니다와 매우 아니다라고 응답한 비율은 18%로 나타났다. 시스템 운영현황 및 애로사항을 파악하기 위하여 AMS의 프로그램 주운영자에 대한 질문에 본인 44%, 부인 6%, 자녀 또는 후계자사람이 44%, 기타 6%나 되었다. AMS 운영상 가장 어려운 점에 대한 조사결과, 기기 작동 및 복잡한 프로그램 운영이 각각 31%로 가장 많았다. 그 외 기계 에러 및 고장에 대한 애로사항이 25%이였다. 도태원인에 대하여 유방염 28%, 번식장애 20%, 발굽질환 19%, AMS에 부적합한 유두 배열 12%, 분만 후 대사성질병 7%, 노산 등 기타 14%였다. 시스템 설치 후 유지보수 계약 체결유무 및 비용에 대하여 유지보수 계약 56%, 유지 보수 계약 미체결 44%이었다. 유지보수 계약 평균 계약비용은 연간 658만원 정도였다. 시스템 설치 후 항목별 만족도에 대하여 5점 만점에 3.9점이었으며, 노동력 절감 3.7점, 업체의 A/S 3.6점, 산유량 증가 3.2점, 원유의 체세포 수 저감 2.8점이었다. 시스템 설치 시 고려사항 및 건의사항에 대하여 고가의 장비를 효율적으로 사용하기 위하여 젖소의 유방과 유두 배열이 적합하도록 젖소를 선발하는 것, 시스템을 운용할 수 있는 능력, 적합한 환경, 재정적 능력과 부지 확보, 지속적인 관찰 등이 권장되어야 할 것으로 나타났으며, 설치 업체에 대해서는 컨설팅이 체계화될 필요가 가장 높게 나타났으며 이어서 보다 저렴한 설치와 서비스의 체계화를 요구하는 결과를 보였다. The present survey was conducted to provide basic information on automatic milking system (AMS) in relation to purchase motive, milk yield and quality, customer satisfaction, difficulties of operation and customer suggestions, etc. Purchase motives of AMS were insufficient labor (44%), planning of dairy experience farm (25%), better performance of high yield cows (19%) and others (6%), respectively. Average cow performance after using AMS was 30.9l/d for milk yield, 3.9% for milk fat, 9,100/ml for bacterial counts. Sixty-eight percentage of respondents were very positive in response to AMS use for their successors but 18% were negative. The AMS operators were owner (44%), successor (44%), wife (6%) and company worker (6%), respectively. The most difficulty (31%) in using AMS was operating the system and complicated program manual. The rate of response to system error and breakdown was 25%. The reasons for culling cow after using AMS were mastitis (28%), reproduction failure (19%), incorrect teat placement (12%), metabolic disease (7%) and others (14%), respectively. Fifty-six percentages of the respondents made AMS maintenance contract and 44% did not. Average annual cost of the maintenance contract was 6,580,000 won. Average score for AMS satisfaction measurement (1 to 5 range) was 3.2 with decrease of labor cost 3.7, company A/S 3.6, increase of milk yield 3.2 and decrease of somatic cell count 2.8, respectively. Suggestions for the higher efficiency in using AMS were selecting cows with correct udder shape and teat placement, proper environment, capital and land, and attitude for continuous observation. Systematic consulting was highly required for AMS companies followed by low cost for AMS setup and systematization of A/S.

Korean Medication Algorithm for Depressive Disorders 2017: Third Revision

Jeong Seok Seo,Won-Myong Bahk,Hee Ryung Wang,Young Sup Woo,Young-Min Park,Jong Hyun Jeong,Won Kim,Se-Hoon Shim,Jung Goo Lee,Duk-In Jon,Kyung Joon Min 대한정신약물학회 2018 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.16 No.1

Objective: In 2002, the Korean Society for Affective Disorders developed the guidelines for the treatment of major depressive disorder (MDD), and revised it in 2006 and 2012. The third revision of these guidelines was undertaken to reflect advances in the field. Methods: Using a 44-item questionnaire, an expert consensus was obtained on pharmacological treatment strategies for MDD 1) without or 2) with psychotic features, 3) depression subtypes, 4) maintenance, 5) special populations, 6) the choice of an antidepressant (AD) regarding safety and adverse effects, and 7) non-pharmacological biological therapies. Recommended first, second, and third-line strategies were derived statistically. Results: AD monotherapy is recommended as the first-line strategy for non-psychotic depression in adults, children/ adolescents, elderly adults, patient with persistent depressive disorder, and pregnant women or patients with postpartum depression or premenstrual dysphoric disorder. The combination of AD and atypical antipsychotics (AAP) was recommended for psychotic depression in adult, child/adolescent, postpartum depression, and mixed features or anxious distress. Most experts recommended stopping the ongoing initial AD and AAP after a certain period in patients with one or two depressive episodes. As an MDD treatment modality, 92% of experts are considering electroconvulsive therapy and 46.8% are applying it clinically, while 86% of experts are considering repetitive transcranial magnetic stimulation but only 31.6% are applying it clinically. Conclusion: The pharmacological treatment strategy in 2017 is similar to that of Korean Medication Algorithm for Depressive Disorder 2012. The preference of AAPs was more increased.

Report of the Korean Society of Infectious Diseases Roundtable Discussion on Responses to the Measles Outbreaks in Korea in 2019

Seok Hyeri,Park Dae Won,Kim Kwang Nam,Kim Min Ja,Kim Sung-Han,Kim Jeong Yeon,Park Su Eun,Park Se Yoon,Eun Byung Wook,Lee Mi Suk,장현하,Jung Hyungul,Jeong Hye Won,Jo Soo-Nam,Chin Bum Sik,Choi Young Hwa,Ch 대한감염학회 2021 Infection and Chemotherapy Vol.53 No.3

During the 2019 domestic measles outbreak in Korea, measles occurred in healthcare workers with two doses of the measles, mumps and rubella vaccine, and the strict application of the Occupational Safety and Health Act required medical institutions to identify healthcare workers' immunity to measles and vaccinate the susceptible pockets. In response to the frontline medical institutions' request to review the measles recommendations and guidelines, the Korean Society of Infectious Diseases held a roundtable discussion on the causes of measles outbreak, timing of vaccinations, antibody tests, and booster vaccinations for healthcare workers, and financial support from the government and municipality as well as response strategies against the outbreak in healthcare settings. In Korea, the seroprevalence of measles is decreasing in the vaccine-induced immunity group during the maintenance of measles elimination over several years. The susceptible group against measles is in their 20s and 30s, and this may be because of waning immunity rather than non-response considering Korea's vaccine policy. The risk of measles nosocomial infection from community increases as these susceptible pockets actively engage in medical institutions. Thus, data on the immunity of low seroprevalence group in Korea are needed, further discussion is needed on the booster vaccination based on the data. Especially, antibody testing and vaccination in healthcare workers may be necessary to prevent the spread of measles in medical insutitutions, and further discussion is needed regarding specific testing methods, and the timing and frequency of test and vaccination.

Linear Lichen planus pigmentosus of the forehead treated by Nd: YAG Laser and topical tacrolimus(초)

( Seok Joo Choi ),( Jeong Eun Kim ),( Chong Hyun Won ),( Sung Eun Chang ),( Mi Woo Lee ),( Jee Ho Choi ),( Kee Chan Moon ) 대한피부과학회 2010 초록집 Vol.48 No.10

Photoluminescence of Al - doped ZnO thin film growth on Al₂O₃ (0001) substrate through rapid thermal annealing in N₂ and H₂ atmosphere

Jeong Cho,Jong-Bum Nah,Min-Seok Oh,Jae-Hoon Song,Ki-Hyun Yoon,Hyung-Jin Jung,Won-Kook Choi 한국진공학회 2001 한국진공학회 학술발표회초록집 Vol.- No.-

Reaction Properties of Dinuclear Metallocenes

Seok Kyun Noh,Eungyeong Jeong,Duang Huang Dan Qei,Won Seok Lyoo 한국고분자학회 2006 한국고분자학회 학술대회 연구논문 초록집 Vol.2006 No.10

Role of severity and gender in the association between late-life depression and all-cause mortality

Jeong, Hyun-Ghang,Lee, Jung Jae,Lee, Seok Bum,Park, Joon Hyuk,Huh, Yoonseok,Han, Ji Won,Kim, Tae Hui,Chin, Ho Jun,Kim, Ki Woong Cambridge University Press 2013 INTERNATIONAL PSYCHOGERIATRICS - Vol.25 No.4

<B>ABSTRACT</B><P>Background: Mortality associated with depression may be influenced by severity of depression and gender. We investigated the differential impacts on all-cause mortality of late-life depression by the type of depression (major depressive disorder, MDD; minor depressive disorder, MnDD; subsyndromal depression, SSD) and gender after adjusting comorbid conditions in the randomly sampled elderly.</P><P>Methods: One thousand community-dwelling elderly individuals were enrolled. Standardized face-to-face clinical interviews, neurological examination, and physical examination were conducted to diagnose depressive disorders and comorbid cognitive disorders. Depressive disorders were diagnosed according to the <I>Diagnostic and Statistical Manual of Mental Disorders-IV</I> (DSM-IV) criteria and SSD to study-specific operational criteria. Five-year survivals were compared between groups using Cox proportional hazards models.</P><P>Results: By the end of 2010, 174 subjects (17.4%) died. Depressive disorder (<I>p</I> = 0.001) and its interaction term with gender (<I>p</I> < 0.001) were significant in predicting five-year survival. MDD was an independent risk factor for mortality in men (hazard ratio = 3.65, 95% confidence interval = 1.67-7.96) whereas MnDD and SSD were not when other risk factors were adjusted.</P><P>Conclusions: MDD may directly confer the risk of mortality in elderly men whereas non-major depression may be just an indicator of increased mortality in both genders.</P>

Poster Session : PS 0743 ; Rheumatology ; Predictors Useful When Deciding to Switch Anti-Tumor Necrosis Factor Therapy in Patients with Ankylosing Spondylitis

( Jeong Won Lee ),( Ji Hyoun Kang ),( Jung Ho Choi ),( Yi Rang Im ),( Li Hui Wen ),( Kyung Eun Lee ),( Dong Jin Park ),( Tae Jong Kim ),( Yong Wook Park ),( Shin Seok Lee ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: Anti-tumor necrosis factor (TNF) agents,have proven useful in the treatment of ankylosing spondylitis (AS). However, some patients do not respond to a particular anti-TNF agent, but do derive benefi t from a different agent, after therapy is switched. Although switching of anti-TNF agents is relatively common in clinical practice, it is not yet possible to identify patients who may need therapy-switching (switchers). Therefore, the characteristics of switchers, and predictors of the need to switch, must be defi ned, to establish effective anti-TNF treatment plans. Methods: A total of 369 AS patients who had been treated with anti-TNF agents for at least 3 months, in a single tertiary-care center, between January 2004 and April 2013, were studied. Patients were divided into two groups depending on whether their anti-TNF agentshad been switched or not. Demographic, clinical, laboratory, and treatment-related data at the time of initiation of treatment with anti-TNF agents were compared between switchers and non-switchers,and within switchers, with reference to the reasons for switching. Multivariate Cox`s proportional hazard models were used to assess the reliability of the switching predictors identifi ed. Results: Of the 369 AS patients, 85 (23%) switched anti-TNF agents once during a mean follow-up time of 32. 9 months. Switchers were more likely to be prescribed DMARDs, to treat concomitant disease, than were non-switchers. Upon multivariate Cox`s proportional hazard analysis, use of infi iximab as the fi rst anti-TNF agent was the independent predictor of switching. The principal reasons for switching were drug ineffi cacy and the occurrence of adverse events, but the clinical data on these two types of switchers did not differ signifi cantly. Conclusions: We found that use of infi iximab as the fi rst anti-TNF agent was the independent predictor of a need to switch that anti-TNF agent.