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홍창우,김태경,김경진,김성환,김남윤,심도식,이정호,윤청호,백민경,원치문,박제선,이주형,정경일 강원대학교 석재복합신소재제품연구센터 1996 석재연 논문집 Vol.1 No.-
콘크리트 구조물이 대형화됨에 따라 설계단면이 증대되어 상대적으로 많은 경제적 손실을 부담하게 된다. 따라서 단면을 감소시키면서도 소요의 하중에 안전한 구조물을 건설하기 위해서는 우선적으로 구조물 건설에 기초가 되는 고품질, 고내구성의 고강도 콘크리트 개발이 절실히 요구된다 본 연구에서는 일정 시멘트비 및 혼화재 비율하에서 소요의 워커빌리티가 확보되는 고강도 콘크리트를 시간과 온도의 변화에 따라 증기 양생하여, 압축, 인장, 휨강도 뿐만 아니라 파괴특성을 실험적으로 연구하였다. 시료 제작시 시멘트 입자 사이의 공극 및 불연속 영역을 충전하여 고밀도화하기 위한 콘크리트용 혼화재로 시멘트 비표면적이 상당히 작은 초미립 분말인 실리카흄을 이용하였다. 또한 AE감수제 및 고성능 유동화제를 사용하여 혼화재의 첨가에 의하여 발생될 수 있는 워커빌리티의 감소를 방지하였다. 실험결과에 의하면 일정 양생 지속 시간하에서 온도의 증가에 따라 콘크리트의 압축, 인장 및 휨강도가 전반적으로 증가하였다. 동일하게 일정 온도하에서 양생 지속시간이 커짐에 따라 강도들이 증가됨을 알 수 있었다. 따라서 상대적으로 높은 온도와 긴 지속 양생 조건하에서 파괴에 대한 저항력이 크게 나타났다. The compressible, tensible, and flexibleresistance of the high strength concrete is analyzed by the experimentation in the present study. For the test, we cure several samples with the silica fume as a mixture being become dense the spaces between the particle of cement under the variation of both the temperature and the curing-interval. Then, the superplasticizer and the ezcon are also used to satisfy the required workability for construction. The compressible, tensible, and flexible resistances to a stress are increased as increasing the temperature and the time interval for the curing. Therefore it is concluded that the overal fractural and mechanical properties is improved by mixing the silica fume into the cement.
텍스트 마이닝을 이용한 평창올림픽 관련 국내 언론 기사의 주요 키워드 분석
이우경(Lee, Woo-Kyung),허종관(Heo, Chong-Kwan),정철규(Jung, Chul-Kyu) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.2
The purpose of this study were to analyzing on main key words extracted from contents of domestic news articles related Pyeong-Chang Olympic games using text mining. For this puspose, we collected articles on Pyong-Chang Olympic games booked on naver news web site from May, 1, 2018 to December, 31, 2018. These acticles collected were retricted to daily newspaper and artice the ground. Finally, we selected 1,843 news articles related Pyeong-Chang Olympic games and were swiched over informal data and these data cleaned by r program. Collected data were analized to identify frquency of main key words, frequency of co-occurence between paired key word and importance of key word reflected attribute among keywords by text ming. These results were follow: First, it showed high frequency on “Olympics”, “South Korea”, “South-North Korea”, “Seoul”, “goverment”, “America” a nd “World” in s imple occurrence, “ Korea”, “ Olympics”, “North Korea”, and “South-North Korea” in frequency on key words co-occured with “Pyeong-Chang Olympics”, and “South-North Korea” and “North Korea” showed high frequency in co-occurrence excluded “Pyeong-Chang Olympics”. Second, it shown high importance on “South Korea”, “South Korea”, “goverment”, “Olympics”, “Korea”, chairman”, “Kim, Jung-Eun”, “game”, “person connected”, “domestic”, “events”, “schedule” and “summit” in importance.
박정섭,정승민,이시형,정기용,여현수,하유군,최유경,전찬용,김동우,박종형,Park, Jung-sup,Jung, Seung-min,Lee, Si-hyung,Jung, Ki-yong,Yeo, Hyun-soo,Hsia, Yu-chun,Choi, You-kyung,Jun, Chan-yong,Kim, Dong-woo,Park, Chong-hyeong 대한중풍순환신경학회 2006 대한중풍.순환신경학회지 Vol.7 No.1
Objectives : This study was prepared for investigating the clinical features of stroke patients. Methods : We retrospectively reviewed the medical records of 102 patients who were admitted to Department of Internal Medicine, College of Oriental Medicine, Kyung-Won University with a diagnosis of stroke from Jan. 1, 2004 to Dec. 31, 2004. Results : Ischemic stroke(include TIA, 82.4%) was more common than hemorrhagic stroke(17.6%). The incidence in male was 41.2%, in female was 17.6% and the most prevalent age group is over-sixties. Cerebral infarction was most frequently noticed in lacunar-infarction and hemorrhage in putamen. Hypertention, the most preceding diseases, followed by diabetes mellitus and CVA. The rate of recurrence was 27.45%. Cerebral infarction and cerebral hemorrhage was much occurred after rising. The most patients visited the hospital within 24 Hours. The most common symptoms in admission time were motor weakness and speech disorder. The complication was mostly mental disorder. Conclusion : Our study on CVA patients was similar to previous studies from 1994 to 2003. In most cases, western and oriental treatment and medicine were given synthetically.
장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4
Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.
급성기 뇌경색 환자에서 화열 관련 증상과 증후의 변화에 관한 연구
곽승혁,박수경,우수경,이은찬,박주영,정우상,문상관,조기호,조승연,박성욱,고창남,Kwak, Seung-hyuk,Park, Su-kyung,Woo, Su-kyung,Lee, Eun-chan,Park, Joo-young,Jung, Woo-sang,Moon, Sang-kwan,Cho, Ki-ho,Cho, Seung-yeon,Park, Sung-wook,Ko, Ch 대한중풍순환신경학회 2011 대한중풍.순환신경학회지 Vol.12 No.1
Objective : Fire and heat related symptoms and signs are considered common in acute stage of diseases. The purpose of this study is to evaluate the occurrences and changes of fire and heat related symptoms and signs in acute cerebral infarction patients. Method & subjects : 40 acute cerebral infarction patients hospitalized in Oriental medicine hospital, Kyung-Hee University, who had examined and diagnosed 2 or 3 times based on oriental medical diagnosis were selected. We chose 23 as fire and heat related symptoms and signs from 94 diagnostic articles, and we added all those scores together of each patient. We analysed the scores of fire and heat related symptoms and signs as the time passed, and depending on oriental medical diagnosis. Result : In acute cerebral infarction patients of this study, 4 of fire and heat related symptoms and signs were took 1st, 2nd, 4th and 8th places in most changeable 10 articles of total 94 articles. The mean score of fire and heat related symptoms and signs of all patients were decreased significantly over the 3 times of measurements. The 8 patients diagnosed as fire and heat diagnosis at visit1 were samely diagnosed as fire and heat diagnosis at visit2, and at visit3 5 patients of them except for 3 patients excluded between visit2 and visit3, were still diagnosed as fire and heat diagnosis. At all of 3 measuring times, the scores of fire and heat related symptoms and signs of fire and heat diagnosis group were higher than non-fire and heat diagnosis group. Conclusion : This study indicated that fire and heat related symptoms and signs were very changeable phenomenon in acute cerebral infarction patients. And they decreased as time goes on.
정재은,이광우,심우경 한국식물인간환경학회 2001 인간식물환경학회지 Vol.4 No.1
This study was designed to probe the relation between participation in horticultural for all activities and leisure and life satisfaction of the older adults. A total of 388 older adults over the age of 60 were included as subjects of the study, The subjects of this study were divided by two groups: 250 participants in horticultural activities and 138 non-participants. The data collected from the questionnaires designed for this study were consisted of responses to items constructed to represent each variable. For data analysis, t-test, anova, frequency and answer tree were used. The major findings resulted from this study were as following; First, it found that participants in horticultural activities of the older adults showed greater leisure satisfaction than non-participants. Second, the longer than 20 years in participating horticultural activities and attending the least 30 minutes horticultural activities a day, the higher leisure satisfaction. Third, participants in horticultural activities of the older adults showed greater life satisfaction than non-participants. Fourth, the attending time of horticultural activities a day and duration of participation in horticultural activities do not effect the life satisfaction. Fifth, there existed significant relation among daily participation in horticultural activities of the older adults, leisure satisfaction and life satisfaction. It was also found that participation in horticultural activities of the older adults facilitated the leisure satisfaction, it finally leaded to the life satisfaction.
항정신병약물을 처음으로 사용하는 초발 정신증 환자에서 나타나는 체중 및 대사성 지표의 변화 : 후향적 연구
김우진,심주철,공보금,강제욱,문정준,김정은,김민걸,박민경,김성진,김현정,정도운 대한생물치료정신의학회 2011 생물치료정신의학 Vol.17 No.2
Objectives:This study was to identify weight & metabolic changes in first-episode psychotic patients with antipsychotics use and investigate the differences of weight & metabolic changes between first-episode psychotic patients and controls with antipsychotics use. Method:In this retrospective study, twenty eight first-episode psychotic patients and twenty eight controls with schizophrenia, schizoaffective or bipolar disorder defined by DSM-IV criteria were included. Information about demographic and clinical characteristics of the subjects was gathered from the medical records. Also body weight, sBP, dBP, fasting glucose, lipid profile and WBC count were evaluated before and after antipsychotics use. Rogistic regression was conducted to assess factors associated with weight gain. Results:First-episode psychotic patients showed more weight and BMI changes than controls after antipsychotics use, and these changes continue over 12 months. On the other hand, there were no significant factors associated with weight gain. Conclusion:The results of present study suggest that antispychotics is one of the major causes inducing weight gain of psychotic patients and antipsychotics-induced weight gain is more vulnerable to drug-naive first-episode psychotic patients.
우종진,조석재,박소정,박재복,김용진,조경일,이헌수 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.3
Limb body wall complex(LBWC) has been included in the spectrum of defects seen in early amnion rupture sequence. LBWC is a complicated fetal malformation with essential features of exencephaly or encephaloceles associated with facial clefts, lateral body wall defects with evisceration of organs, and limb defects. Our case is characterized by the absence of craniofacial anomalies and normal development of urogenital system comparing with other repoerted cases. We present a case of LBWC with a brief review of the literatures.
정태경,김우정 중앙대학교 생산공학연구소 1999 생산공학연구소 논문집 Vol.8 No.2
컨덴서 운전형의 전동기를 설계하는 방법에는 크게 나누어 두 가지 방법이 있다. 첫째 방법은 현재 가지고 있는 코아와 엔드링을 사용하고 동선과 컨덴서 등을 변경하며 특성설계를 하는 것이다. 특성설계를 위해서 회로정수들을 코아와 엔드링, 동선 등에서 구하고 등가회로를 구성하여 특성해석 및 설계를 하고 계산과정의 타당성을 확인하기 위해서 특성해석 결과를 측정값과 비교한다. 특성설계의 계산을 용이하게 하기 위해서 회로정수들의 값을 변화시켜 가면서 반복하여 특성설계를 할 수 있다. 두 번째는 특성에 맞추어 코아 및 엔드링의 설계를 새롭게 하는 것이다. 이 설계법은 설계자의 지식과 경험에 의한 설계로 최적의 설계가 어렵고 설계에도 시간과 투자가 많이 필요하다. 기기의 최적설계는 전역 최대점 외에 목적함수의 크기가 거의 같은 국소 최대점들이 여러 개 존재하며 이러한 국소 최대점은 작업성, 재료비 등과 같이 생산적인 측면에서 차이가 날 수 있다. 이러한 최적화 문제에 적합한 것이 Niching 유전알고리즘으로 탐색공간에서 여러 해를 동시에 찾을 수 있다. 목적함수를 효율로 하여 선택된 최적화 후보들 중에서 몇 가지 기준으로 평가를 하여 최적의 설계를 찾을 수 있다. There twe methods in designing a permanent split-capactior motor. The first method is using the current core and endring and changing the winding specification and capacitor and doing a charactersistic design. To do the characteristic design, obtain circuit constants from core, endring, and windings and constitute a equivalent circuit and then perform a characteristic analysis and design. To confirm the calculation process, compare the results from the characteristic analysis with the actual measurement results. To make the calculation of a characteristic design easier, the characteristic design can be done by reiteratio, changing the values of circuit constants. The second method is making a new design of the core and endring to fit the characteristics. This design method needs a lot of knowledge and experience of designers and it is defficult to make a optimal design. Also the design needs a olt of time and investment. In the optimal design of the electromagnetic devices, there are not only global optimal points but also local optimal points which may be actually almost equal in terms of efficiency. These local points could be different in the production aspects such as material cost, ease of manufacture, and etc. The one of the suitable methods for these optimization problems is niching method. It help to find multiple solution at the same time in the search space. The optimal design can be found by setting up the pbjective function to efficiency and evaluating the selected optimal candidates based on the standards.