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소비자 감성과 사용성을 고려한 인간공학적 의자 설계 및 디자인 인터페이스 개발
김정룡,윤상영,편흥국,조영진,김미숙,Kim, Jeong-Ryong,Yun, Sang-Yeong,Pyeon, Heung-Guk,Jo, Yeong-Jin,Kim, Mi-Suk 대한인간공학회 2000 大韓人間工學會誌 Vol.19 No.1
In conventional ergonomics, consumer product can be made based on anthropometric data and specific design guideline. However, the product may not satisfy consumers because their emotional preference have not been properly considered in design phase. Therefore, in this study a new chair design process was introduced by which both consumer's emotional need and traditional ergonomic requirement can be satisfied. As a part of the process, the traditional Kansei engineering technique was modified to collect quantitative information of consumer's visual appreciation and physical feedback of various types of chairs. Furthermore, we developed an interface, so called, KADAS(Kamsung Analysis and Design Assistance System), for designers to use the technique in chair design. This software can help designers to understand what should be the most suitable shape in designing items such as seat, back and arm rest, etc. to meet the emotional need of consumers. This software displays the result of modified quantification theory I, and explains how to use the statistics. This study suggested a new approach for ergonomic design incorporated with Kansei Engineering technique. This technique can be also applied to other products by extending the database of KADAS.
고속도로 건설현장의 인적오류 예방을 위한 실무자용 도구 개발
김정룡(Jung Yong Kim),윤상영(Sang Young Yoon),조영진(Young Jin Cho) 대한인간공학회 2011 大韓人間工學會誌 Vol.30 No.1
Objective: The aim of this study is to reclassify human errors and to develop hands-on tools to apply the new classification for preventing human error accidents in highway construction site. Background: The main cause of accidents in highway construction was reported as the carelessness of workers. However, such diagnosis could not help us operationally prevent accidents in real workplace. Method: The accidents in highway construction were reanalyzed and the causes of human error were reclassified in order to educate and improve the awareness of human error in highway construction. Field survey and interview with safety managers and workers were conducted to find the causal relationship between the actual accidents and the human errors. Results: The most frequently observed human errors in highway construction were classified into six categories such as mis-perception, distraction, memory fail, slip, cognition error and mis-judgment. In order to provide hands-on tools to increase the awareness of human error in construction field, the human error checklist and card sorting diary were developed. Especially, the card sorting diary was designed to increase the ability in human error inspection of safety manager at construction site. Moreover, posters were developed based on actual accident cases. Conclusion: We suggested that the improved awareness and analytical report on checklist, card sorting diary and posters for construction field could collectively prevent the accident. Application: The classification of human error, hands-on tools and posters can be directly applicable on highway construction site. This analytical and collective approach preventing human error-related accident could be extended to other construction workplaces.
김정룡(Jung Yong Kim),박지수(Ji Soo Park),조영진(Young Jin Cho) 대한인간공학회 2010 大韓人間工學會誌 Vol.29 No.4
It is necessary to quantitatively evaluate the workload of workers in order to improve the level of safety and efficiency as well as to prevent workers from musculoskeletal disorders. The purpose of this study is to introduce biomechanical methods that are largely used to quantitatively evaluate workload. The biomechanical methods use kinematics and kinetics to analyze the movement and force of biomechanical body. Motion analysis, joint angle measurement, ground reaction force, mathematical model, and electromyography (EMG) were introduced as a tool or device for biomechanical evaluation. In this study, the special feature of each method was emphasized and important tips for field measurement were summarized. The information and technique disclosed in this summary can be used to evaluate and design the workplace better by effectively control the workload of field workers.
김정룡(Jung Yong Kim),김성훈(Sung Hoon Kim),조영진(Young Jin Cho) 대한인간공학회 2010 大韓人間工學會誌 Vol.29 No.3
The purpose of this study is to investigate the user characteristics in different age groups by investigating the level of satisfaction and preference of design and function of mobile phone. 160 subjects participated in the experiment. Subjects with different ages were selected and divided into four groups: young age group (20 to less than 45), 1<SUP>st</SUP> middle age group (45 to less than 55), 2<SUP>nd</SUP> middle age group(55 to less than 65), and elderly group(over 65). A questionnaire was developed based on the previous design guideline, and additional questions were made to test newly developed function and design of the mobile phone. In particular, depth interviews were conducted in order to have a proper response from old subjects who have difficulties in completing written questionnaire. In result, it was found that except for price the major criterion to purchase mobile phone was the design, and the function of phone was the next except for elderly group. In the case of elderly group, the screen size is the first. Statistical results indicated that 37.5% of the young age group, 22.5% of 1<SUP>st</SUP> middle age group, 22.5% of 2<SUP>nd</SUP> middle age group and 10.0% of the elderly group preferred the design to function when they purchase mobile phones. Most elderly people were not satisfied with the supplementary function of the mobile phone. The 1<SUP>st</SUP> middle age group did not know exactly how to use the supplementary service although they were willing to use it. Regarding the emotional preference on the type of phone, the sliding type was preferred most. Current results can be used to anticipate the future trend of mobile phone and design a user-friendly product for the aged population.
휴대전화 설계를 위한 고령자용 인지능력 측정 프로토콜 개발
김정룡(Jung?Yong Kim),조은주(Eun?Ju Cho),조영진(Young Jin Cho),정민근(Min?Keun Chung) 대한인간공학회 2009 大韓人間工學會誌 Vol.28 No.3
The purpose of this research is to develop a protocol which can quantitatively evaluate cognitive ability that is needed when elderly people use mobile phone. Since previous methods for measuring the cognitive ability of elderly people was mainly for clinical evaluation, they would not be adequate to measure cognitive ability for mobile phone development. Therefore, this study suggests cognitive areas which are necessary to use the mobile phone based on the existing evaluation tools. The cognitive areas consist of language, visuospatial ability, memory, executive function and perception. New questionnaire was developed to evaluate the individual cognitive ability for the elderly. They include 9 questions for button comprehension test, 8 for icon button comprehension test, 10 for vocabulary comprehension test, 8 for menu comprehension test, 3 for icon size test, and 2 for font size test. The protocol can be used in the field although further modification may be necessary for betterment.
만성간염 및 간경변증환자의 자연경과와 생존률에 관한 연구 - 20 여년간의 자료 분석 -
김정룡(Chung Yong Kim),김진욱(Jin Wook Kim),이효석(Hyo Suk Lee),윤용범(Yong Bum Yoon),송인성(In Sung Song) 대한내과학회 1994 대한내과학회지 Vol.46 No.2
N/A Objectives: The spectrum of clinical features of chronic liver disease has wide range from asymptomatic cases to hepatic failure. The natural course and longterm prognosis of chroni liver disease also varies greatly, and this diversity makes it difficult to predict the clinical course of indivisual patient. To evaluate the natural history, survival rates and prognostic factors of chronic liver disease in Korea, the authors analyzed prospectively the clinical courses of large number of chronic hepatitis and liver cirrhosis patients. Nethods: 2691 patients who were registered at the Liver Research Institute, SNUH, from 1972 to 1989 were included in this study and followed up to 1992. The initial diagnosis was chronic hepatitis in 1455patients (including 465patients with biopsy proven chronic active hepatitis) and liver cirrhosis in 1236patients. The subjects who were related to alcohol and drugs were excluded. Clinical and laboratory data of each patient were obtained from medical record and from the database stored in the computer of Liver Research Institute. Deaths were identified from medical records and mortality referral to the national computer network. Result: Liver cirrhosis was developed in 9%, 23%, 36%, and 48% of chronic hepatitis patients in 50, 10, 15, and 20 years, respectively. The 5-, 10-, 15-and 20-year survival rate of chronic hepatitis patients was 97%, 90%, 79% and 77%, and the 5-, 10-and 15-year survival rate of liver cirrhosis patients was 689, 57% and 43%, respectively. The survival rates of liver cirrhosis patients after development of major complications, ie., ascites, UGI bleeding, hepatic encephalopathy, spontaneous bacterial peritonitis were 32%, 40%, 21%, and 30% in 5years, 8% 22%, 23%, 8%, and 20% in 10years, respectively. Multivariate analysis showed that older age, HBsAg positivity, low albumin level and high bilirubin level were associated with unfavorable prognosis in chronic hepatitis and liver cirrhosis patients. Primary liver cancer was developed in 2.7%, 11%, 25%, and 35% of chronic hepatitis patients in 5, 10, 15, and 20years, and 13%, 27%, and 42% of liver cirrhosis patients in 5, 10, and 15years, respectively, Among longterm survivors, HBsAg was cleared in the serum of 26chronic hepatitis patients and 10cirrhosis patients after normalization of LFT. Among the patients followed up, the development of liver cirrhosis and/or primary liver cancer was not different between HBsAg-positive and anti-HCV positive groups. The development of liver cirrhosis and/or primary liver cancer, on the other hand, was significantly lower in both negative group. Conclusion: The results of this study explored the natural history and survival rates of chronic hepatitis and liver cirrhosis in Korea and reconfirmed the poor outcome of HBV associated chronic liver disease.