Prediction of Retained Austenite Fraction in Quenching-and-Partitioning (Q&P) Steels Using the Gibbs Energy Balance Approach

Seong Hoon Kim,Ji Hoon Kim,Jae Hoon Lee,Dong‑Woo Suh,Jae Sang Lee 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.9

Prediction of retained austenite fraction is quite important in designing advanced high strength steels since retained austeniteis the source of transformation-induced plasticity. The present study investigates the phase constitution of a medium-carbonQ&P steel by comparing various approaches to the transformation stasis of bainitic ferrite and applying them to the partitioningprocess. Among them, the modified GEB approach gave the best agreement with the experimental observation, includingthe effects of heat-treatment condition and chemical composition on phase constitution. This indicates phase transformationduring partitioning can be effectively described by the physics of Gibbs energy balance approach.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

열공형과 비열공형 피질하 혈관성 치매에서 위험인자의 차이에 관한 비교 연구

배희준,정지향,유경호,나덕렬,김상윤,최경규,양동원,손의주,이상도,김재우,박경원,김응규,이재홍,박미영,한일우,함동석,최문성,하충건,최성혜,이애영,이병철,한설희 대한치매학회 2003 Dementia and Neurocognitive Disorders Vol.2 No.2

Backgrounds and Objectives: Vascular dementia is a group of dementing disoders arising from various stroke syndrome. Among these. subcortical ischemic vascular dementia (SIVD) is regarded as a relatively distinct clinical entity. However, MRI patterns of SIVD are not homogenous. In some patients, lacunes are dominant, and in others, subcortical white matter changes are. This study was designed to compare risk factor profiles between SIVD with and without multiple lacunes. Methods: We divided 47 subjects (22 males, mean age. 68 years) recruited from VADAPET (Multicenter Trial For Evaluation Of The Changes In the PET Images Of Subcortical Vascular Dementia Patient) study into two groups one with more than 5 lacunes in deep gray matter (lacune group) and the other with 5 or less(non-lacune group) Clinical characteristics and laboratory findings of two groups were compared. Results: Nineteen of 47 patients (40%) belonged to the lacune group. The lacune and non-lacune groups d d not differ in the following variables: age, hypertension, diabetes mellitus, hyperlipidemia heart disease, history of stroke or TIA, history of trauma or major surgery, family history of hypertension stroke, or dementia, age at diagnosis of dementia, body mass index, white blood cell count, ESR, CRP, fibrinogen, hemoglobin A1C, total cholesterol. LDL cholesterol creatinine, proteinuria, glucosuria, and microhematuria. However, male sex, smoking alcohol. hemoglobin, and HDL cholesterol were possibly associated more with lacune group SIVD than with non-lacune group (p<0 1) Multivariate analyses revealed that smoking, hemoglobin, and HDL cholesterol were independent predictors of SIVD with multiple lacunes Conclusion: Our study suggests that SIVD with multiple lacunes may be significantly different in smoking habits hemoglobin, and HDL cholesterol from SIVD without multiple lacunes.

제주대학교 Panorama식 ^(60)CO 감마선 조사시설의 선량분포 평가

문성애,박재우 제주대학교 방사능이용연구소 2005 방사선응용과학연구소논문집 Vol.19 No.-

림프관종

배재문,한호성,김영우 梨花女子大學校 醫科大學 醫科學硏究所 1996 EMJ (Ewha medical journal) Vol.19 No.2

목적: 림프관종은 흔한 질환이 아니므로 보고된 례들도 많지 않아 그 임상적 특성이 매우 다양하게 보고되어 있다. 저자들은 최근 2년 6개월간 14례의 림프관종을 경험하였기에 림프관종의 임상적 특성을 분석하는 것이 의의가 있을 것으로 판단하였다. 방법: 1993년 9월부터 1996년 3월까지 이화여자대학교 의과대학부속 목동병원에서 치료받았던 14례의 림프관종에 대하여 임상기록을 통한 후향적 분석을 하였다. 임상적 특성은 증상, 종양의 위치, 지난방법, 종양의 크기, 치료방법 그리고 합병증 및 재발여부에 관하여 분석을 하였다. 결과: 1) 림프관종 발견 연령분포는 4주 이내가 4명, 4주 이상 2세 이하가 4명이었고 2세 이상 10세 이하가 3명이었으며 남자가 6명, 여자가 8명으로서 남녀비가 1 : 1.3 이었다. 2) 증상으로는 신체 각 부위의 종괴로 나타나는 경우가 71.4%로서 가장 많았다. 3) 발생부위는 전흉벽과 액와부에 가장 많이 발생하였다. 4) 림프관종의 진단방법으로는 초음파가 유용한 진단적 가치가 있었다. 5) 림프관종의 크기는 5cm 이하가 6례(42.9%), 5cm 이상 10cm 이하가 6례(42.9%), 10cm 이상 15cm 이하가 2례(14.2%)였다. 6) 치료방법의 주류는 완전절제이며 수술후 합병증이나 재발의 례는 없었다. 결론: 림프관종은 종괴의 감별진단에서 꼭 염두를 두어야 하며 특히 소아의 종괴일 경우 림프관종을 감별하여야 한다. Objectives : Lymphangioma is an infrequent disease. Few cases of lymphangioma has been reported, so its clinical characteristics are variale. We had experienced fourteen patients of lymphangioma during relatively short period, two and half years. It was worth to analyze the clinical characteristics of the lymphangioma. Methods : A clinical analysis was made in fourteen patients with lymphangioma who had been admitted to Ewha Womans University Mokdong Hospital from September, 1993 to March, 1996 retrospectively by the review of clinical records. The characteristics were about the symptoms, locations, diagnostic methods, sized of tumor, treatment, and complications. Results : were summerized as following 1) The sex ratio was 1 to 1.3(male to female) and the most prevalent age group was less than 10 years(78.6%) 2) The most common presenting symptom was a mass(71.4%) 3) The locations were trunk and axillary(35.7%), retroperitoneum(21.4%), extremity(21.4%), neck and mesentery in decreasing order. 4) The ultrasonogram was a useful disgnostic method of lymphangioma(71.4%). 5) The size distribution of tumors were 42.9% in less than 5cm, 42.9% in 5 to 10cm, and 14.2% in 10.1 to 15cm. 6) The treatment of choice was complete excision. There was no complication, or recurrence. Conclusion : lymphangioma should be considered as differential diagnosis in patients with mass, especially children.

법과학적 응용을 위한 토양의 동일성에 관한 연구 : 토양에서 미량원소 및 희토류 성분의 분석법에 관한 연구 Analytical Method of Trace Element and Rare Earth in the Soil

김재균,김은호,김명덕,장성길,박성우 內務部 國立科學搜査硏究所 2002 國立 科學 搜査 硏究所 年報 Vol.34 No.-

BER을 경감하기 위한 직접파와 지연파를 분리, 합성하는 시스템

洪性一,邊健植,鄭宗宇,朴在云 東亞大學校 附設 情報通信硏究所 1993 情報通信硏究所論文誌 Vol.1 No.1

본 논문에서는 다중 경로에 따른 수신신호의 노화, 특히 이동통신에 대해서 문제가 되는 페이딩 대책으로 직접파와 지연파를 분리, 합성하는 적응 배열 안테나 시스템을 제시하고 분리된 직접파 출력 또는 지연파 출력만을 이용하는 시스템보다 두 신호를 합성한 시스템의 BER이 개선됨을 제시하였다. 시뮬레이션을 행한 결과 적응 배열 안테나가 적절히 동작하는 상황에 대해서는 분리된 출력을 적응적 Weight 조정을 하여 합성함으로써 직접파만을 이용하는 것보다 오율이 향상됨이 확인되었다.

소방공무원 채용제도의 개선방안에 관한 연구

이용재,현성호,김현우 한국화재소방학회 2001 한국화재소방학회논문지 Vol.15 No.4

본 연구는 소방공무원의 전문성 및 채용의 효율적 개선방안을 도출하기 위한 연구로, 설문조사 및 각종 공무원 채용방법과의 비교연구를 통해 현재의 소방공무원 채용방법의 문제점을 조사 · 분석하였다. 이를 근거로 소방관련학과 졸업생의 특별채용, 일반공개채용 및 처우에 관한 개선방안을 도출하였다. 연구 결과 얻어진 결론은 특별채용의 확대실시, 업무와의 연계성을 고려한 채용시험의 과목조정 등에 대한 구체적인 개선방안을 제안하였다. This paper study on the reforming devices of the fire officers' employment to be more efficient to their specially. The problems about employment have been investigated and analyzed through questions and comparisons of other kinds of officers' employments. On this basis, the better devices of special employment and general employment or treatment for students after graduation who studied at the department about fore services are achieved. The efficient devices are the extension of the special employment, subject adjustment of the employment examination concerned about its relation with the real service at the fire station. Keywords : Fireman, Employment, Employment examination

설계변경의 경향 및 원인 분석을 통한 설계 품질향상 방안

석성재,김재근,이철우,홍순구,유춘번 한국품질경영학회 2000 품질혁신 Vol.1 No.1

This study is prepared to introduce design quality improvement measures by the trend and cause analysis of design changes which have been made during operations of construction project for power plant. In this study, two types of analysis tool have mainly taken for the use of the improvement measures. One tool is the trend analysis to identify which action should be taken to cut down design changes. This is also useful to monitor whether project participant's endeavour for the action taken is effective or not, to the project performance and design quality improvement. The other is the cause analysis, by using cause and effect diagram, which is useful to identify main causes of the design changes and to establish the measures to reduce recurrence of the design changes.

정신보건관련시설 입원(소)자의 주요 정신장애 유병률 : 전국 20개 시설의 입원(소)자를 대상으로

조성진,조맹제,서동우,함봉진,홍진표,배재남,이준영,이동우,박종익,전홍진,김성주,김용익 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.6

Objectives : One of the objectives of this study is to estimate the prevalence rates of psychiatric diagnoses in the combined populations of psychiatric hospitals, psychiatric nursing facilities and homeless asylums using the Korean version of the Composite International Diagnostic Interview (K-CIDI), which is a comprehensive and fully standardized interview schedule to assess psychiatric disorders for diagnosis. The Other objective is to compare with previously studied prevalence rates of Psy-chiatric diagnoses using the results of this study. Methods : The study subjects, aged from 181o 64 years, were randomly selected from 64,582 institutionalized population of psychiatric hospitals, Psychiatric nursing facilities and homeless asylums as of 30, June, 2001. Twelve trained interviewers administered the K-CIDI to the selected respondents. A total of 1,875 respondents (male 1,194, female 681) completed the interview. Results : The lifetime and one year prevalences of any diagnosis excluding nicotine dependence · withdrawal, anxiety disorder, eating disorder, somatoform disorder were 88.2% (male 88.1%, female 88.3%), and 65.8% (male 62.7%, female 73.7%), respectively. The lifetime and one year prevalences of schizophrenia and other psychotic disorders were 78.5% (male 75.3%, female 83.7%), and 56.8% (male 51.9%, female 64.8%), respectively. The lifetime and one year prevalences of alcohol use disorder (dependence/abuse) were 26.7% (male 37.9%, female 8.3%), and 8.7% (male 12.8%, female 2.1%), respectively. The lifetime and one year prevalences of mood disorder were 18.1% (male 13.5%, female 25.8%), and 10.4% (male 7.2%,female 16.9%), respectively. The lifetime and one year prevalences of schizophrenia and other psychotic disorders were comparable with the 2001 community survey by 1.19% to 1.32%, and 0.51% to 0.61%, respectively. The lifetime and one year prevalences of schizophrenia were also comparable by 0.16% to 0.28%, and 0.16% to 0.25%, respectively. There were no significant changes of prevalence rates when correction were applied to other psychiatric diagnosis. Conclusion : The results of this study could be used for evaluating the distribution of psychiatric diagnoses in mental health related facilities and for planning mental health policies.