• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 1996.11a
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• pp.5-9
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• 1996

In foreign country such as U.S.A and Japan, considerable research has been done regarding the spread of smoke in room of fire involvement by using computer. But, in our country it has not been. So, this paper presents a detailed qualitative description of phenomena which occures during typical fire scenarios through numerical analysis. This research, in the view of field model, is focused on finding out the smoke movement and temperature distribution. And it is planned to analyze governing equation including smoke diffusion equation by numerical analysis with finite volume method and non-staggered grid system. The SIMPLE method for pressure-velocity couple and power-law scheme for convection terms are used. It shows that a plume is formed, hot plume is formed, hot plume gases impinge on the ceiling and they spread across it. then, it eventually reaches the bounding walls of the enclosure. It takes 60s for smoke to fill the enclosure.

• East Asian Journal of Business Economics (EAJBE)
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• v.4 no.1
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• pp.16-21
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• 2016

This study analyzed the successful case of Naver LINE's entry into the Japanese market. LINE pursued a strategy of establishing its dominance early on and implemented localization for Japan and thereby achieved success in the Japanese market. The various strategies adopted by LINE allowed it to win over 80% of the market share in Japan and function as a nationally ubiquitous mobile messenger. The conclusions to be drawn from our LINE analysis is that LINE must implement localization strategies suited to the characteristics of each country, as it had done successfully in Japan. In the Asian region, it should retain the platform that provides various contents while pursuing a localization strategy to secure competitive edge, by offering emoticons suitable for each country, such as Ramadan emoticons in Islamic regions.

• Research in Community and Public Health Nursing
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• v.28 no.4
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• pp.375-385
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• 2017

Purpose: This study aims to examine the relationships among social discrimination, subjective health, and personal satisfaction based on the country of origin. Methods: The analysis was based on 16,958 immigrants who participated in the National Survey of Multicultural Family 2015 in Korea. This study conducted stratified cross-analysis of social discrimination for the differences in subjective health and personal satisfaction. Multivariate-adjusted odds ratios and 95% confidence intervals for the relationships among social discrimination, subjective health, and personal satisfaction were examined with multivariable logistic regression. Results: There were differences in experience of social discrimination, subjective health status, and personal satisfaction according to the country of origin. Groups without the experience of social discrimination had better subjective health and personal satisfaction than the other groups. Conclusion: This study demonstrates that a discrimination prevention program needs to be developed based on a cultural approach.

• Korean journal of food and cookery science
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• v.13 no.2
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• pp.113-123
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• 1997

Conventional foodservice system has been the most prevalent system across the country. However, all the elementary students throughout the country is not being provided with school lunch program because of the restriction on equipping school foodservice facilities. So commissary foodservice system was introduced to school lunch program in 1991. This study was designed to evaluate condition of existing major equipment including volume, probable useful life, and frequency of use and determine equipment improvements on conventional and commissary school foodservice systems. A questionnaire was developed and mailed to 87 dietians of conventional and 46 dietians of commissary school foodservices in Kyunggi-do. Response rates were 89.1% and 91.3%, respectively . Approximately one third of commissary foodservices were converted from conventional to commissary. Only 52.6% of conventional and 53.5% of commissary foodservice facilities/equipments have been desirable in quality and quantity. Capacity, functional ability, using frequency, and relationship with efficient work management were analyzed according to school foodservice system. Content analysis was conducted regarding to dietitians' opinions on foodservice facilities/equipment.

• Proceedings of the Korea Concrete Institute Conference
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• 2002.05a
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• pp.1009-1014
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• 2002

In this study, developed economical and scientific Pavement Management System(PMS) that can produce suitable maintenance method through judgement and analysis of pavement condition exactly, to overcome past unscientific pavement management limitations. First, on the basis of data of the inside and outside of the country on PMS, composed logical algorithm such as pavement condition investigation and analysis, detailed naked eye investigation, whole system estimation etc., and it verified that this algorithm is suitable system through the inside and outside of the country PMS research examples and results of detailed naked eye investigation. Also, developed easily usable PMS program and PMS_GIS program with such logical algorithm.

• Journal of the Korean Operations Research and Management Science Society
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• v.10 no.1
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• pp.65-78
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• 1985

In this paper, the approach getting a total demand by forecasting the new demand and the replacement demand separately and adding them is used for long term forecasting of durable goods. Cross country analysis using the income as an independent variable and S-shaped growth curve as a fitting model is developed as a method of forecasting new demand. To get the replacement demand the methods using the number of ownership and the replacement rate and the methods using the past demand and the distribution of the product life are proposed. And the theoretical explannation for product life cycle's diversity, which is the one of the major considerations in the long term forecasting, is attempted by the combination of the new demand and the replacement demand patterns. This is applicated the long term forecasting of Korean passenger cars.

• Proceedings of the KSR Conference
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• 2003.10b
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• pp.35-39
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• 2003

Effort has been given to improve demand forecast methodology of rail system since it can have great impact on project evaluation of rail system investment. However most of demand forecast softwares developed in western countries where concerns have been provided mostly to private transport and they should be updated in order to reflect our country's situation accurately. Therefore, this paper aims, especially focusing on rail system, to do comparison analysis of oversea's passenger demand forecast softwares and provide some ideas to develop the updated demand forecast system which enables to reflect our country's situation accurately. Main conclusions are that we will need to have well described model for real situation. So we will have to study for these aspects for travel demand forecasting system and develop the package architecture.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 2009.03a
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• pp.73-82
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• 2009

In order to find that how differences of delay time accuracy of ms,ds detonator applied to tunnel contour influences overbreak in tunnel blasting, it was analyzed using common program(Itasca CG, 2004)which was developed by individual factor method called "Partical Flow Code 2D(PFC2D). In result, overbreak and damage of country rock were reduced when the delay was more accurate than the inaccurate.

• Proceedings of the Korean Geotechical Society Conference
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• 2010.03a
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• pp.1279-1285
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• 2010

Our country has a tendency to build many structures by cutting mountainous areas due to geographical features. Among these construction done in our country, road construction take the first spot in rank. As the construction is done, fractured inclining plane is created inevitability because of the natural properties of mountainous areas. The stability of the fractured inclining planes and slope formed in the opening, which are developed at the time of construction, need to be evaluated. Also, reinforcement plans for these matters are necessary. This paper is to go through an examination on the fractured inclining surface that is developed at the time of construction, especially the composite inclining plane that consists of soil and rocks. Furthermore, evaluating the stability by performing an analysis on stereographic projection and limit equilibrium, based on the examination results. using the stability evaluations, applications were explored for reinforcement methods of construction that fits the geological characters of this inclining surface.

• Proceedings of the Korea Concrete Institute Conference
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• 2000.04a
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• pp.269-274
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• 2000

As a result of the reduction of natural aggregate, most of developed country have been studied the utilization of Blast-furnace Slag(BFS) as aggregate of concrete. bur, in korea there are only basic study about these even though other country are using Blast-furnace Slag production of Ready Mixed Concrete. According, in this study, we carried out fundamental experiments in order to know the material properties of BFS and possibilities of the BFS as fine aggregate of concrete. It is included that analysis concerning material properties of BFS as like specific gravity, absorption. unit weigth, grading including investigation of the surface shape by SEM, also, analysis concerning properties of concrete with BFS as like air-content surface slump. compressive strength .etc.