• 소성∙가공
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• 제29권4호
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• pp.188-193
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• 2020

Piping work of large ships or offshore plants is often done in a narrow and confined space, requiring precise bending and safety. In order to realize an accurate bending angle, it is very important to predict and correct a deformation that may be caused by elasticity in the bending process, that is, an angular deviation due to springback. Therefore, by using CAE analysis to develop a correction angle model for springback based on multiple tube bending angles and using trend line data derived from this correction angle model, at bending the tube as the diameter of the base former and the tube outer diameter change, the springback compensation angle at any angle can be obtained. In this study, the bending mechanism was analyzed to increase the bending precision, and a correction angle model was developed and a trend line was derived in consideration of springback occurring in the bending process. In order to derive a more accurate and reliable trend line, a tube tensile test was performed, and the reliability of the corrected angle trend line was verified by comparing the bending angle measurement and analysis results with a 3D scanner.

• 한국농공학회논문집
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• 제57권6호
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• pp.153-162
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• 2015

In this study, we analyzed the trends of water quality along the main stream in Nakdong river basin using the recent data and seasonal Mann-Kendall test. Monthly averaged values of DO, BOD, SS, COD, TN, and TP from 1989 to 2014 for 14 stations (including 2 TMDLs stations) were used in the study. The trend analysis results showed that BOD and TP at most stations has decreasing temporal trend except a few stations while COD and SS showed increasing trend at most stations. Temporal trends in TN at 8 stations were found to be statistically significant and 5 of them showed increasing temporal trend. Temporally averaged BOD, COD, TN and TP were generally increasing as going downstream and the worst water quality were found at Goryeong and Hyunpung station. Overall, water quality of Nakdong river especially in COD, SS, and TN getting worse in time at most stations and as going downstream.

• 보건행정학회지
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• 제31권1호
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• pp.140-144
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• 2021

Catastrophic health expenditure refers to measure the level of the economic burden of households due to medical expenses. The purpose of this study was to examine the proportion of households that experienced catastrophic health expenditure between 2006 and 2019 using available data from the National Survey of Tax and Benefit (NaSTaB), Korea Health Panel (KHP), and Households Income and Expenditure Survey (HIES). Trend test was used to analyze the proportion of households with catastrophic healthcare expenditure. The households experienced a catastrophic health expenditure of 2.44% in 2019 using the NaSTaB data. Trend analysis was significant with the decreasing trend (annual percentage change [APC], -4.49; p<0.0001) in the proportion of households with catastrophic health expenditure. Also, the results of the 2017 KHP and the 2016 HIES showed 2.20% and 2.92%. The trend was significantly increased in the KHP (APC, 1.79; p<0.0001) and the HIES (APC, 1.43; p<0.0001). Therefore, this study suggests that further public healthcare interventions to alleviate the burden of catastrophic health expenditure, especially for low-income households, are needed.

• International Journal of Costume and Fashion
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• 제10권1호
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• pp.29-45
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• 2010

In order to provide more systematic approach to analyze fabric trends and to develop fabrics accordingly, ecology fabric trend from 1986 to 2005 was analyzed related with fabric trend themes and fabric attributes. The result shows that in the 1980s, natural theme appeared, followed by primitive theme and imitated natural theme until the mid 1990s. From the late 1990s to the early 2000s, new natural theme appeared, followed by eco-friendly theme, and then recycling theme. In the natural theme, 'clean' was the most important fabric attribute and 'textured' and 'worn' were important fabric attributes in the primitive theme. In the imitated natural theme, 'wet' fabric attribute was preferred. In the new natural theme, 'lightweight' were preferred. The results of this study empirically demonstrated that abstract and ambiguous trend terms can be interpreted with a physical, substantial, and feasible attributes that fabric practitioners can easily understand.

• 한국생활과학회지
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• 제15권2호
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• pp.261-274
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• 2006

The purpose of this study was to explore the well-being behaviors and the consciousness toward well-being trend. The well-being behaviors were composed of 4 dimensions such as regular exercise, purchase the organic agricultural products, use of the air cleaner, and diet for health. The consumer consciousness toward well-being trend was composed of 3 factors such as the marketing criticism, the pursuit of mental richness and orientation for rural life. Especially, the differences of well-being behavior and consumer consciousness toward well-being trend according to socio-demographic variables. The main results were as follows: 1. The well-being trend was extended every consumer, but consumers were not after well-being trends or goods. In addition to consumers thought that well-being trend was stoked by marketers. 2. The well-being behaviors and consumer consciousness were statistically different among groups by the socio-demographic variables.

• 한국농촌생활과학회지
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• 제6권1호
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• pp.11-24
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• 1995

The new textile materials may be defined as textile materials different from already existing ones in the physical and chemical structure, manufacturing process, or end-use property. The present time what is called the post-industrial society is characterized by rapid change and new technology. Also, textile materials have been changed rapidly and diversely in the post-industrial society than in any other periods. The study aimed to analyze the trend of new tektite materials development in Korea and to forecast the development trend in the future. To investigate the trend of new textile materials, various written materials and informations were collected from the manufacturers, textile related periodicals, and research journals, and they were analyzed. The period of analysis was from January 1992 to May 1995. The results of this research are as followings : (1) Mixed textile materiasl such as bicomponent fiber, blended yam and blended fabric were increased. (2) High technology has an important effect upon new textile material development. (3) functional textile materials were increased (4) The high value-added products were increased. (5) The naturalized textile materials were increased.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2003년도 봄 학술발표대회논문집
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• pp.192-193
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• 2003

• 자연과학논문집
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• 제10권1호
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• pp.153-174
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• 1998

95년이후의 FASHION TREND를 보면 단일 지향에 머물지 않고 다양한 상상력이 기초가 된다. 특히 여성복에 있어 여성들의 사회진출과 확실한 위치를 차지하면서 여성스러움으로 돌아가려고 한다. 그 중에서도 특히 르네상스 패션의 경향은 다음과 같은 현대복식의 장식미를 보여주고 있다. ${\cdot}$ 러프칼라모양의과장된 칼라 ${\cdot}$ 과장된소매나 스토마커등의 실루엣 ${\cdot}$ 디프하며 리치한 칼라, 벨벳소재등이 많이 표현되어진다.

• 대한지리학회:학술대회논문집
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• 대한지리학회 2002년도 추계학술대회 요약집
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• pp.9-18
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• 2002

I. Trend of the Association of Japanese Geographers in 1970-1980. II. Reformation of the Association of Japanese Geographers Since 1980. III. Changing Era Revolution of Universities. IV. Geographical Education in the Association of Japanese Geographers. V. Overseas field WOrs in the Association of Japanese Geographers. VI. Recently Trend of Korean Study in the Field of Climatology and Environmental Geography in the Association of Japanese Geographers.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2003년도 정기총회 및 추계학술대회
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• pp.189-194
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• 2003

Since 1960's Mapo Apartment Housing, the apartment housing has been established as the typical urban housing type, and its design of outdoor spaces being transformed diversely. The purpose of this study is to identify the periodical trend of outdoor space design by analysing the elements of outdoor spaces in the apartment housing estates constructed in Daejon City.