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김민효,남윤자,Kim, Min-Hyo,Nam, Yun-Ja 대한인간공학회 2001 大韓人間工學會誌 Vol.20 No.3
A three dimensional body scanner for anthropomentric measurement has been developed. In this study, the slit laser beam projection method followed by digital image processing was used to provide accurate spatial data with the typical optical triangulation method to overcome the many difficulties in traditional in accurate and time-consuming tactic measurement method using rulers and gauges. Compared with other commercialized scanners. this system can obtain a relatively wide range of data at a much lower cost by the specially designed scanning process such as the simultaneous acquisition of vertical and horizontal body cross-section profiles.
60세 이상 노인 인구에서 인지기능과 우울증, 자살사고, 혈청지질농도와의 연관성
문정준,이봉주,김정은,김우진,김민효,박민경,송태홍,심주철,김경미,이정구,김영훈,Moon, Jung-Joon,Lee, Bong-Ju,Kim, Jeong-Eun,Kim, Woo-Jin,Kim, Min-Hyo,Park, Min-Kyong,Song, Tae-Hong,Shim, Joo-Cheol,Kim, Gyung-Mee,Lee, Jung-Goo,Kim, Young 대한생물정신의학회 2010 생물정신의학 Vol.17 No.4
Objectives : We investigated a correlation of cognitive function, depression, suicidal idea and serum lipid levels in Korean elderly over 60 years old to find risk factors of deprssion and cognitive decline. Methods : 834 persons participated in this study. Clinical evaluation was done at a point by using Mini-Mental State Examination in the Korean version of CERAD assessment packet(MMSE-KC). We also evaluated 165 persons that agreed to our exact examination for Geriatric Depression Scale(GDS), Scale for Suicidal Ideation(SSI), Hachinski Ischemic Score and serum lipid profile. Correlation analysis was used to evaluate correlation among serum lipid levels, MMSE-KC and SSI. One-way ANOVA was used for comparison of serum lipid levels and cognitive function, depression and SSI. We did a post-hoc analysis. Results : Depression and suicidal ideation were related with cognitive impairment in Korean elderly over 60 years old. Those who have more severe cognitive impairment and depressive symptom, have higher Hachinski ischemic score. We can see high HDL cholesterol levels only in the normal control group. Low total, HDL, LDL cholesterol were related with depression. Conclusion : There was high prevalence of depression in the Korean elderly over 60 years old and low serum lipid level was related with severity of depression and high suicidal ideation. In the normal control group, we can see high HDL cholesterol levels. To confirm this result, we need well-designed and wide range study.
면취 공정의 능동 제어를 위한 공압식 자동 강재 면취기와 센서 시스템의 제작 및 실험
나영민(Yeong-min Na),이현석(Hyun-seok Lee),김민효(Min-hyo Kim),박종규(Jong-kyu Park) 한국기계가공학회 2020 한국기계가공학회지 Vol.19 No.12
With the exception of welding activities, it is forbidden to use electricity in shipyards, owing to safety concerns such as the possibility of fire, explosions, and short circuits. In this paper, an automatic chamfering machine using pneumatics is proposed for use in such environments. Customers specify their requirements and the machine derives the corresponding theoretical design conditions. The proposed machine was used to perform 3D modeling, and its suitability and performance were confirmed via cutting experiments of the manufactured device. Two types of sensors may be used in this system: contact and non-contact. In the case of the contact type, an end-stop switch that can recognize the end of the material is installed, and when the machine reaches the end of the material, the end-stop switch is operated to cut off the air pressure. In the non-contact type, four sensors were used: photonic, ultrasonic, metal detection, and encoder. The use of the four sensors was repeated 30 times, and the average error determined. Thus, the optimum sensor was identified.
3차원적 접근 방식을 통한 머리 부위 사진 측정법의 개발
김웅,남윤자,김민효,Kim, Woong,Nam, Yun-Ja,Kim, Min-Hyo 대한인간공학회 2005 大韓人間工學會誌 Vol.24 No.4
We developed an accurate and reliable photogrammetric method available instead of the direct measurement method and the three-dimensional scanning method. Our research was restricted to a head on the body. Approaching three-dimensionally, we calibrated a distorted image of a photograph and got linear equations of camera beams. Then we assigned z values of landmarks in the head and obtained three-dimensional coordinates for each landmark putting those z values in linear equations of camera beams and finally could calculate measurement results from those three-dimensional coordinates. When we compared results obtained by a program, 'Venus Face Measurement(VFM)' that we had developed applying our method with results obtained by the direct measurement method, VFM showed very accurate and reliable results. In conclusion the photogrammetric method developed in this study was testified to an outstanding measurement method as a substitute for the direct measurement method and the three-dimensional scanning method.
운동참여자의 운동습관 형성 실패 과정에 대한 근거이론 접근
문영아 ( Youngaa Moon ),박예솔 ( Yaesol Park ),김민효 ( Min Hyo Kim ),정지혜 ( Jihye Chung ) 한국스포츠심리학회 2024 한국스포츠심리학회지 Vol.35 No.2
목적: 이 연구의 목적은 운동참여자들의 운동습관 형성 실패 과정을 근거이론적 방법을 이용하여 밝히는 데 있다. 방법: 이를 위하여 운동습관을 형성하고자 수년간 노력하였으나 거듭 실패한 경험이 있는 운동참여자 9명을 연구참여자로 선정하였다. 심층면담을 통해 자료를 수집하였으며 수집된 자료는 Strauss와 Corbin(1998)의 개방코딩, 축코딩, 선택 코딩 절차에 따라 분석하였다. 결과: 개방코딩 결과 상위범주 16개, 하위범주 41개, 개념 328개가 도출되었다. 분석한 자료를 통해 축코딩에서 패러다임 모형을 도출하였다. 인과적 조건은 낮은 내적동기, 운동이 주는 거부감, 운동 지속을 방해하는 환경 요인이었으며, 중심현상은 자주 미루는 습관으로 나타났다. 중재조건은 운동이 주는 혜택, 멋진 나를 만들어주는 운동, 사회적 지지이었으며, 맥락적 조건은 취약한 자기조절력, 운동에 대한 부정적 시각 및 정서, 완벽주의, 자기합리화, 개인의 성격 특성, 메타인지 부족으로 도출되었다. 상호작용 전략은 나에게 적합한 운동 탐색, 지속 가능한 운동 환경 구축이었으며, 결과는 운동습관 형성 실패로 나타났다. 선택 코딩에서는 이야기 윤곽 제시를 통해 핵심범주를 추출하였다. 결론: 마지막으로 이론화 모형을 제시하여 운동습관 형성 실패 과정을 입체적으로 설명하였다. Purpose: This study aimed to investigate the failure process of exercise participants to form exercise habit using the grounded theory approach. Methods: A total of nine exercise participants who had tried for years to form exercise habits but failed repeatedly were selected as research participants. Data were collected through in-depth interviews, which were then analyzed according to Strauss and Corbin’s(1998) open, axial, and selective coding procedures. Results: 16 categories, 41 subcategories, and 328 concepts were derived from the data analysis. A paradigm model was extracted from the analyzed data. As a result of axial coding, the causal conditions identified were lower internal motivation, rejection from exercise, and obstacles to exercise continuity. The central phenomenon identified was a habit of frequently delaying. The intervention conditions were derived from the benefits of exercise, the exercise that makes me cool, social support and the contextual conditions included weak self-regulation, individual personality traits, negative views and emotions about exercise, perfectionism, self-rationalization, and lack of meta cognition. Interaction strategies were to search for exercise suitable for me, build a sustainable exercise environment, and the result was failure to form exercise habits. The key categories were obtained through the narrative outline. Conclusion: Finally, a theoretical model was presented to explain the failure process of exercise habit formation in three dimensions.