기울기를 이용한 랜덤워크 윌콕슨 부호순위검정

김태윤,박철용,김슬기,김민석,이우정,권윤지,Kim, Tae Yoon,Park, Cheolyong,Kim, Seul Gee,Kim, Min Seok,Lee, Woo Jung,Kwon, Yunji 한국데이터정보과학회 2014 한국데이터정보과학회지 Vol.25 No.6

랜덤워크는 다양한 분야에서 랜덤현상을 기술하는데 이용되고 있으나, 현재까지 개발된 랜덤워크 검정법에는 유의수준 왜곡과 낮은 검정력 등의 문제가 있는 것으로 알려져 있다. 이러한 문제점들을 개선하기 위해 Kim 등 (2014)은 부호검정에 기초한 랜덤워크 검정 (${\rho}=1$)방법을 제안하였다. 본 논문에서는 보다 개선된 랜덤워크 검정법을 제안하고자 부호검정보다 검정력이 우수한 것으로 알려진 윌콕슨 부호순위검정을 이용한 랜덤워크 검정법을 제안하고, 모의실험을 통해 부호검정, 윌콕슨 부호순위검정, 확장 Dickey-Fuller 검정의 성능을 비교하였다. 모의실험 결과 소표본에서 비모수 검정기법들이 ADF 검정보다 우월하다는 사실을 재확인하였다. 새롭게 밝혀진 사실은 부호검정이 윌콕슨 부호순위검정에 비해 높은 검정력을 가지며, 또한 비모수 검정기법들은 ${\rho}$가 양의 부호를 가지는 경우 (0 < ${\rho}$ < 1) 정규분포보다 이중지수분포에서 낮은 검정력을 가지게 되나, ${\rho}$가 음의 부호(-1 < ${\rho}$ < 0)를 갖는 경우에는 정규분포보다 이중지수분포에서 높은 검정력을 보인다는 사실이다. Random walk is used for describing random phenomenon in various areas but tests for random walk developed so far are known to suffer from size distortion and low power. Kim et al. (2014) proposed a sign test for unit root (${\rho}=1$) hypothesis based on slopes. This article proposes a Wilcoxon signed rank test based on slopes for unit root hypothesis, and compares it with the augmented Dickey-Fuller test and the sign test by a simulation study. Our results confirm that the nonparametric tests are better than ADF test for small samples like n = 30. The results also show that the sign test is better than the Wilcoxon signed rank test and that for 0 < ${\rho}$ < 1 (-1 < ${\rho}$ < 0), the nonparametric tests suffer from power loss (improvement) as normal error changes to double exponential error.

기본첩포검사에서 소실 및 자극반응의 발현빈도

김태윤,윤두희,이준영,김형옥,김정원 ( Tae Yoon Kim,Dou Hee Yoon,Jun Young Lee,Hyung Ok Kim,Chung Won Kim ) 대한피부과학회 1997 大韓皮膚科學會誌 Vol.35 No.6

Background: The patcl test is widely used for diagnosis of allergic contact dermatitis. However, it is sometimes difficiilt or even impossihle to differentiate between allergic and irritant reactions in patch test readings. The achievernent of valid results from the patch test require intelligent and careful patch testing and physirians with skills and experiences. Objective : The purpos of this study was to assess the frequency, age and sex distr ibution, and the seasonal variatioii of irritant. and lost reactions in standard patch tests. Methods : Patch test records of day 2 and day 4 were reviewed and analysed. Frequency of inritant and lost reactions were analysed by allergen, age, sex and season. Results : A total 212 c ses of standard patch test records(rnale 69, female 143) were analysed. The results were as follovs ; 1. The over all frequency of lost reactions in the standard patch test were 33.5 percents and that of irritant reactions were 8.0 perr.ents. 2. The frequency of lost reactions was lower in the age groups under twenty(7.7%) than in the older age groups(35.5%). However, there was no significant difference het,ween the age groups over the third dec ide. 3. The seasonal variation was evident in lost reactions. The order of frequency was summer(45. 0% ), winf,er(33.7% ), spri,ig and fall(2l.1% ). 4. The order of frequency of lost reactions in the stclndard patch allergen was captan(5.7%), potassium dichromate(5.2%), cobalt chloride(4.7%), mercury amrnoniurn chloride(3.8%) c3lld wool alcohol(3.8%) Conclusion : Our result, show a relatively high frequency of lost and irritant. reaction in the standird patch test, and uggest second readings in the patch test would he of value. (Korean J Dermatol 1997;35(6): 1095-1100)

기울기를 이용한 랜덤워크 부호검정

김태윤,박철용,김슬기,김찬진,김현,유주형,장경민,장영석,Kim, Tae Yoon,Park, Cheolyong,Kim, Seul Gee,Kim, Chan Jin,Kim, Hyun,Yu, Ju Hyung,Jang, Kyung Min,Jang, Young Seok 한국데이터정보과학회 2014 한국데이터정보과학회지 Vol.25 No.2

랜덤워크 가설은 금융시장의 예측 어려움을 이론적으로 설명하는 가설이다. 현재까지 다양한 랜덤워크 검정방법들이 개발되어 왔으나 낮은 검정력과 유의수준 왜곡 등의 문제를 보이는 것으로 알려져 있다. 본 논문에서는 이러한 문제점들을 개선하기 위해 부호검정에 기초한 랜덤워크 검정방법을 제안하였다. 랜덤워크와 관련하여 흔히 사용되고 있는 Dickey와 Fuller (1979) 검정과 모의실험을 통해 성능을 비교하였다. Random walk hypothesis is a hypothesis that explains theoretically the difficulty in forecasting in financial market. Various tests for the hypothesis have been developed so far but it is known that those tests suffer from low power and size distortion. In this article, a sign test based on slopes are suggested to overcome these difficulties. A simulation study is conducted to compare this test to the often used Dickey and Fuller (1979) test.

Induction of Apoptosis and Expression of Cell Cycle Regulatory Proteins in Response to a Phytosphingosine Derivative in HaCaT Human Keratinocyte Cells

김태윤,Hye Jung Kim,Ho Jin Kim,Sung Cil Lim,김상훈 한국분자세포생물학회 2003 Molecules and cells Vol.16 No.3

EDI 시스템 설명

김태윤,Kim, Tae-Yun 한국정보통신집흥협회 1991 정보화사회 Vol.41 No.-

규폐증을 동반한 진행성 전신성 경피증

김태윤,조상현,김시용,조백기,이숙영 (Tae Yoon Kim,Sang Hyun Cho,Si Yong Kim,Baik Kee Cho,Sook Young Lee) 대한피부과학회 1996 대한피부과학회지 Vol.34 No.2

Scleroderma is sclerosis of the skin characterized by the appearance of circumscribed or diffuse hard, smooth, ivory-colored anea that are immobile upon the underlying tissues and give the appearance of hide-bound skin. Several environmental factors and chemicals have been described as being able to induce systemic scleroderma and scleroderma-like diseases. A possible association between scleroderma and workers exposed to silica has been suggested by reports in the literature since the turn of the century. We report a 55-year-old man, with a history of Raynaud's phenomenon and dysphagia, who had been exposed to silica dust over fifteen years. He had a mask-like face, flexian deformity of fingers, and hyperpigmented induration on the skin of all the extremities and the trunk. Antinuclear antibodies were positive in nucleolar type. On radiologic study, streaky, mottled, and nodular increased densities were noted in the both lung fields and these findings were consistent with silicosis. Endoscopic and manometric examination of the esophagus represented scleroderrna esophagus. Histopathological findings were compatible with scleroderma. He was treated with azathioprine and nifedipine with good improvement. (Kor J Dermatol 1996;34(2): 322-325)

조류발전 사업의 환경평가 가이드라인 연구

김태윤,박정일,맹준호,Kim, Tae-Yun,Park, Jeong-Il,Maeng, Jun-Ho 해양환경안전학회 2014 해양환경안전학회지 Vol.20 No.4

본 연구는 조류발전 사업이 보다 환경친화적 에너지개발사업이 되도록 유도하기 위한 국내 해역에 적합한 환경평가 가이드라인을 제시하는데 목적을 두었다. 본 연구는 국내외 관련 문헌들을 수집하여 조사 분석하였고, 해양에너지 개발 및 해양환경 전문가들과의 면담과 전문가 세미나를 진행하여 합리적인 입지선정 타당성 검토방안과 환경평가단계의 가이드라인을 도출하였다. 입지선정 타당성 검토방안은 입지선정 시 고려해야할 항목을 제시하였고, 이를 바탕으로 조류발전 사업의 특성과 환경영향을 최소화 할 수 있는 적정입지선정 방안을 제시하였다. 환경평가 단계에서의 가이드라인은 조류발전 사업에 대한 환경영향을 파악하고 이에 대한 환경영향평가를 효과적으로 수행하기 위해 현황조사, 영향예측, 저감방안, 사후환경영향 조사계획의 네 단계로 구분하여 제시하였다. This study aims to develop a guideline of environmental assessment for tidal current energy development in Korea. Based on an extensive discussion of the environmental effects of tidal current energy, this study provides an appropriate guideline for environmental assessment on tidal current energy development in Korea. The guideline includes a method for proper site selection and specific techniques for environmental impact assessment. The guideline for environmental impact assessment consists of four steps - including current condition investigation, impact predictions, identification and incorporation of mitigation measures, and post environmental monitoring - to effectively predict and assess impacts of tidal current energy development on the ocean environment. It is expected that the guideline can facilitate the often demanding environmental assessment review process and to reduce the time taken for it.

회원작품 - 경회헌

김태윤,Kim, Tae-Yun 대한건축사협회 2012 建築士 Vol.2012 No.3

기능성 움직임 교정운동이 배드민턴 선수의 Functional Movement Screen 점수에 미치는 효과

김태윤,김석환,Kim, Tae-Yoon,Kim, Seok-Hwan 대한고유수용성신경근촉진법학회 2017 PNF and Movement Vol.15 No.1

Purpose: The purpose of this study was to determine the effects of a functional movement correction exercise on the functional movement screen scores of badminton players. Methods: The participants consisted of 25 badminton players who were randomly assigned to an experimental group (n = 13) or a control group (n = 12); they engaged in exercise three times per week for eight weeks. The experimental group engaged in the functional movement correction exercise, while the control group engaged in general exercise. An FMS kit (USA) was used to measure the following: FMS score, deep squat, hurdle step, in-line lunge, shoulder mobility, active straight leg raise, trunk stability push up, and rotary stability. Results: The FMS score, deep squat, hurdle step, in-line lunge, shoulder mobility, active straight leg raise, and trunk stability push up, and rotary stability showed significant improvement in the experimental group (p < 0.05). Conclusion: The experiment confirmed that the functional movement screen scores of badminton players improve with effective exercise interventions.

퇴행성 슬관절염의 한의학적 치료에 대한 국내 연구 동향

김태윤,김정현,박종훈,이제균,한창,금창준,오재우,Kim, Tae-Yoon,Kim, Jung-Hyun,Park, Jong-Hoon,Lee, Je-Kyun,Han, Chang,Kum, Chang-Jun,Oh, Jae-Woo 척추신경추나의학회 2014 척추신경추나의학회지 Vol.9 No.2

Objectives : The purpose of this review is to investigate the trends of Traditional Korean Medicine treatments on degenerative knee arthritis. Methods : We investigated the studies on traditional Traditional Korean Medicine (TKM) treatments for degenerative knee arthritis via searching 5 Korean web databases. Results : 31 research papers were found to be analyzed according to their published year, the titles of journals, published institution, the types of study, the number of cases, the types of treatments. 31 papers were published since 1992. The studies on TKM treatments about degenerative knee arthritis were mainly published in The journal of korean acupuncture & moxibustion medicine. 13 Randomized Controlled Trials, 10 Case series, 4 Reviews, 3 Non RCTs, and 1 Case Report had been under research. In 22 cases of the studies, one method was used to treat the symptoms. Whereas in 5 cases of the studies, various TKM treatments were used to treat the symptoms. Visual analogue score(VAS) and patient's subjective complaints were used as primary assessments. Conclusion : In this study, we analyzed the trends of TKM treatments on degenerative knee arthritis. Reviewing the domestic trends of studies on Traditional Korean Medicine treatments on degenerative knee arthritis and examining the strong and weak points of those treatments are essential for the further studies.