• 한국산업보건학회지
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• 제30권2호
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• pp.213-225
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• 2020

Objectives: In order to prepare measures to enhance construction workers' satisfaction with their working environment, the effects of working conditions and the mediating effects of safety and health information on workers' satisfaction with their working environment in the construction industry have been studied. The results of this study can be used as basic data for further studies in this field. Method: Data on 1,361 male construction workers from the 5th Korea Working Condition Survey (KWCS) were used for this study. The effects of working conditions were analyzed using SPSS 25.0 and the mediating effects of health and safety information were analyzed with SPSS PROCESS macro using the bootstrap method. Results: The safety and health management system and the self-determination of break time had a statistically significant positive effect on satisfaction with the working environment. Chemical and ergonomic risk factors had a statistically significant negative effect on satisfaction with the working environment. The provision of safety and health information, the mediating variable, had a statistically significant positive effect on satisfaction with the working environment. Therefore, it had a mediating effect between working conditions and satisfaction with the working environment. Conclusion: In order to enhance construction workers' satisfaction with their working environment, the above results suggest that the safety and health management system should be well established; self-determination of break times should be guaranteed; and chemical and ergonomic risk factors should be controlled. In addition, workers should be provided with necessary health and safety information related to their work. This study will be useful if these findings are used as basic data in further studies in related fields.

• 복식
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• 제26권
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• pp.69-85
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• 1995

Recently Southeast Asia has developed, so the world concerns about these regions. Ethnic fashion in 90's is mostly the influence of these regions' folk costume. The purpose of this study is to review aes-thetic aspects of folk costume in Southeast Asia, to investigate the influence on modern fashion and to predict the possibility of Asia fashion's adaption to modern fashion and to help the cre-ation of fashion design. First of all, the folk costume in Southeast Asia is classified drapery style and sarong style. These non-west clothing appeal to modern fashion as the oriental tranditional beauty. Ethnic fashion appeared in 1990's is attempted to be more complex and variable than the pre-vious ethnic fashion. Asian ethnic fashion influenced from folk costume of Southeast Asia is-wholly or party-the style, color, motif from each country's folk costume. And each country's unique art became the motive of the creative design. Specially, Aosai and Quan in Vietnam and sar-ong style in most Southeast Asia are important motives expressing minority's nostalgia. These are expressed in variable ways. Which are harmonized with latest other fashion trend : retro style and naturalism, Layered look, hippie look, unfinished sewing technic and manual technic are used one image matched the folk costume of Southeast Asia which is natural. Another characterstic in Asian ethnic fashion is a multi-ethnic. This harmonizes the different culture between the Orient and the West beyond the age and culture, and combines each folk costume. It is involved that the fashion can develop indivisual country's costumes mixed with her own unique characteristics and the fashion break the traditional concept and disagree with a certain coordinate rule and it indicates that the fashion shows various style, mood, volume and room as well as space. Like this recent Asian ethnic fashion comes to us in a strange favor. The people who are tired of traditional western civilization's outcome will receive a great tastes from the Asian ethnic fashion.

• 융합정보논문지
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• 제8권4호
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• pp.45-53
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• 2018

본 연구는 우리나라 청소년의 주관적 우울경험이 구강건강에 미치는 융합 요인을 알아보기 위해 청소년건강행태 온라인 조사를 이용하였다. 본 연구의 종속변수는 구강건강행태와 자각증상경험으로 구분하였고, 독립변수로는 주관적 우울경험으로 구성하였다. 우울경험이 구강건강에 미치는 융합요인으로 구강건강행태에서는 하루 칫솔질 횟수, 점심식사 후 칫솔질, 실란트 유무는 주관적 우울경험이 없는 경우보다 있는 경우가 유의하게 높았고, 자각증상경험에서는 치아 깨짐, 음식섭취 시 아픔, 잇몸출혈 유무, 구취 유무에서 주관적 우울이 없는 경우 보다 있는 경우 유의하게 높게 나타났다. 이상의 결과로 보아 우울과 구강건강은 관련이 있는 것으로 나타나 청소년들의 구강건강을 향상시키기 위해 심리적인 요소를 고려해야 할 것으로 사료된다.

• 한국전산유체공학회지
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• 제17권2호
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• pp.35-41
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• 2012

This paper presents incompressible Navier-Stokes solution algorithm for 2D Free-surface flow problems on the Cartesian mesh, which was implemented to run on Graphics Processing Units(GPU). The INS solver utilizes the variable arrangement on the Cartesian mesh, Finite Volume discretization along Constrained Interpolation Profile-Conservative Semi-Lagrangian(CIP-CSL). Solution procedure of incompressible Navier-Stokes equations for free-surface flow takes considerable amount of computation time and memory space even in modern multi-core computing architecture based on Central Processing Units(CPUs). By the recent development of computer architecture technology, Graphics Processing Unit(GPU)'s scientific computing performance outperforms that of CPU's. This paper focus on the utilization of GPU's high performance computing capability, and presents an efficient solution algorithm for free surface flow simulation. The performance of the GPU implementations with double precision accuracy is compared to that of the CPU code using an representative free-surface flow problem, namely. dam-break problem.

• 대한기계학회논문집
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• 제7권2호
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• pp.193-203
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• 1983

The mixed convective heat transfer problems are characterized by the relatively significant contribution of buoyancy force to the transport processes of momentum and heat. Past analytical studies on this kind of problems have been carried out by employing either the conventional R-.epsilon. turbulence model which includes constant turbulent Prandtl number .sigma.$_{+}$ 1 or an extended R-.epsilon. turbulence model which takes account of the buoyancy effect in appropriate length scale equations. But in the latter case, the temperature variance .the+a.$^{2}$ over bar is approximated by a model under local equilibrium condition and the time scale ratio between velocity and temperature is assumed to be constant. These approximation is known to break down when the buoyancy effect is dominant. The present study is aimed at development of new computational turbulence closure level which can be applied to this rather complex turbulent process. The temperature variance is obtained directly by solving its dynamic transport equation and the time scale ratio which is variable in space is computed by a solution of a dynamic equation for the rate of scalar dissipation .epsilon.$_{\thetod}$ It was found that the computational results are in good agreement with available experimental data of wide range of unstable conditions.

• 한국정보처리학회논문지
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• 제5권10호
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• pp.2556-2566
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• 1998

프로그램 슬라이싱은 프로그램의 특정 위치에서 변수들의 값에 영향을 주는 문장을 추출하는 방법이다. 프로그램 슬라이싱의 유용성은 디버깅, 최적화, 프로그램 유지보수, 테스팅, 재사용 부품 추출 그리고 프로그램 이해를 포함하는 다른 응용 분야에 널리 알려져 있다. 본 논문은 Jump문을 포함한 프로그램에 적용했을 때 구문적으로 정확한 슬라이스 생성에 실패한다. 본 논문에서는 기존 방법들의 문제점을 지적하고, 정확하고 수행가능한 슬라이스를 생성하는 효율적인 방법을 제안한다.

• Asian-Australasian Journal of Animal Sciences
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• 제14권8호
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• pp.1098-1105
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• 2001

There is little information on smallholder dairy farming in Zimbabwe. With such inadequate knowledge, no meaningful decisions on how to improve these systems can be made. A study was, therefore, carried out in Nharira communal area and Lancashire small-scale commercial area to provide information on the viability of dairy farms. This paper is based on data obtained through participatory monitoring of 13 smallholder dairy farms in 1996 and 1997. All the four farms in Lancashire were found to be viable in both years. In Nharira, two out of the nine farms in 1996 and three farms in 1997 failed to break even. There were considerable inter-farm differences in the contribution of milk sales towards total income from dairy farming, ranging from 41% to 99% in Nharira and 71% to 81% in Lancashire in 1996. Corresponding estimates in 1997 were 51-95% and 72-78%, respectively. Expenses on cattle feeds contributed 36-84% in 1996 and 37-80% in 1997 towards total variable costs in Nharira. In Lancashire, the respective estimates were 15-33% and 22-36%. Seven out of the nine studied farms in Nharira and three out of four in Lancashire realized higher gross margin (GM) in 1997 than in 1996. All these farming households had conserved considerable amounts of farm-grown feeds. It was concluded that feed costs, number of cows and sizes of land holdings were the main factors determining viability of smallholder dairy farming. The major challenge to smallholder dairy farming in Nharira, in particular, was to develop low-cost feeding strategies.

• 한국식품영양학회지
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• 제6권3호
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• pp.178-188
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• 1993

This research was attempted to investigate changes in physicochemical properties of rice extrudate with added ginger powder extruded by single screw extruder. Graphic three dimensional analysis on response surface regression was used to evaluate effects of extrusion variables on quality factors of the extrudate according to two independent variables, ginger consent 0∼12%, moisture content 14∼26%. The summarized results are as follows : 1) Regarding proximate composition of rice extrudate with added ginger powder, as ginger powder content of raw material Increased, crude tat, crude protein, crude ash and crude fiber increased, while soluble nitrogen free extract decreased. 2) Graphic three dimensional analysis on response surface regression was conducted for each dependent variable which revealed statistically significant relationship with independent variables, 0∼120A ginger and 14∼26% moisture content. Expansion ratio had a critical point as moisture content changed. As ginger and moisture content Increased, bulk density, break strength and water absorption Index Increased, while water solubility Index decreased. The predicted maximum degree of gelatinization in 6.15% ginger and 15.56% moisture content is 88.27%, and lightness decreased as ginger content Increased. According to the microstructure for the cross section of extrudate obsorbed with image analyzer, air cell number and perimeter revealed saddle point, meanwhile total area and fractarea of air cell had critical points as moisture content changed. In view of the results, quality of rice extrudate with added ginger powder was optimum when rice flour was fed to the extruder with 2∼7% singer powder and 15∼20% moisture content.

• 천문학회보
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• 제44권1호
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• pp.35.3-35.3
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• 2019

Blazars are a subclass of active galactic nuclei (AGNs) with relativistic jets aligned with our line of sight. The jet physics is yet to be understood, but can be studied with blazar variability (e.g., flares). The highly variable blazar 3C 279 has shown a general decline of its radio flux density since 2013, but the flux density has been increasing since 2017. To better understand physical properties of 3C 279 related with the flux variations, we analyze multi-frequency new radio data obtained with Korean VLBI Network (KVN), as well as archival data from Owens Valley Radio Observatory (OVRO) and Submillimeter Array (SMA). We measure the radio spectral variability and infer the relativistic jet properties of 3C 279. The high-cadence OVRO and SMA observations are used to construct detailed light curves of the source, and KVN data supplement the spectral coverage and allow us to locate the spectral break frequencies precisely. In this talk, we present our analysis results and interpret them using a blazar jet model.

• 패션비즈니스
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• 제25권1호
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• pp.39-50
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• 2021

The purpose of this study was to investigate how wearing calf support and applying of electronic muscle simulation(EMS) affected the ability to balance. In this study, the one leg standing test for static balance and the Y balance test for dynamic balance were used to assess balance. At this time, the pressure of the calf support was different to produce two supporters, and a difference between wearing the support before, after, and after applying EMS was evaluated. Seven men in their 20s with healthy bodies were measured five times each with a five-minute break, taking into account muscle fatigue, and the difference between each variable was analyzed through a follow-up test using nonparametric statistical analysis. Studies have shown more difference from supporter B with a more appropriate pressure (mmgh) for increasing balance capability than from supporter A. In addition, it was confirmed that the use of EMS electrostimulation and support before measuring the balance capability resulted in a greater difference. The proper pressure (mmgh) supporters and EMS can increase the ability to balance, and these results can be expected to improve the balance ability of ordinary people in their daily lives.