• Journal of the Korean Applied Science and Technology
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• v.14 no.3
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• pp.63-69
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• 1997

Micellization range and cmc for the dilute aqueous solution of sucrose monoesters, that is, sucrose monolaurate, sucrose monomyristate, sucrose monopalmitate, sucrose monostearate and sucrose monooleate were investigated by computer programming. The extreme of the curvature of ${\sigma}$(C) as a new suggested method to determine the cmc and the micellization range was accomplished with computer programming. The values of cmc and micellization range can be obtained by the extreme of the curve by direct processing of only a few experimental data. The values of cmc particulary was in good agreement with those deduced intuitively from the shape of experimental curves of ${\sigma}$(C).

• The Korean Journal of Financial Management
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• v.12 no.1
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• pp.33-56
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• 1995

본(本) 연구(硏究)는 자본구조이론과 전통적 연구에서 제시된 변수를 통합하고 횡단면(橫斷面) 요인(要因)과 시계열(時系列) 요인(要因)을 결합하여 우리나라의 자본구조결정 요인을 식별할 수 있는 이론적(理論的) 모형(模型)을 제시하여, 또한 제시된 모형을 한국증권시장(韓國證券市場)의 자료(資料)를 이용하여 실증적(實證的)으로 분석(分析)하였다. 그리고 실증적 분석에는 횡단면(橫斷面) 자료(資料)와 시계열(時系列) 자료(資料)를 결합하는 패널자료추정법(資料推定法)을 사용하였다. 본(本) 연구(硏究)에서 제시된 자본구조이론(資本構造理論)과 관련된 결정 요인으로는 기업(企業)의 성장기(成長機)을, 내부주주(內部株主)의 지분율(持分率) 그리고 내부주주수(內部株主數)의 비율 등을, 전통적 횡단면 요인으로는 경영위험(經營危險), 자산구성(資産構成), 수익성(收益性), 기업규모(企業規模) 등을, 그리고 전통적 시계열 요인으로는 법인세율(法人稅率)과 물가수준(物價水準) 등을 제시하였다. 본(本) 연구(硏究)에서 다루는 실증분석기간은 1981년 1월부터 1990년 12월까지의 10년간이었으며, 추출된 표본기업(標本企業)의 수(數)는 104개사이다. 실증적 분석결과, 본(本) 연구(硏究)에서 제시된 설명변수들이 자본구조(資本構造)의 변동(變動)을 49.91%정도 설명하고 있으며 설명변수 중 기업(企業)의 성장기회(成長機會), 내부주주(內部株主)의 지분을, 경영위험(經營危險), 수익성(收益性), 기업규모(企業規模), 물가수준(物價水準) 등은 자본구조의 결정 요인으로 통계적인 의미를 갖는 변수로 밝혀졌으며 회귀계수(回歸係數)의 부호도 기대하였던 바와 일치하고 있다. 질산으로 처리된 것이 컸고 0.75 M과 1.0 M의 질산을 사용했을 때는 작음이 확인되었다. 이상의 실험결과들로부터 친수성인 $NH_4Y$형 제올라이트를 소수성의 것으로 변환시키기 위한 수증기의 온도는 $500^{\circ}C$와 $600^{\circ}C$가, 그리고 질산의 농도는 0.5 M이 적합한 것으로 결론지을 수 있고, 이와 같은 결론은 BET비표면적과 TPV값과 같은 경향을 보인 벤젠과 톨루엔의 흡착용량측정결과로 입증되었다. 탈알루미늄된 제올라이트들의 수분에 대한 Si/Al비와 흡착용량은 각각 높은 농도의 질산으로 처리된 것일수록 증가하고 감소하여 소수성이 증가함을 나타내었다.(不適合性)이 나타났다. 본 연구는 기존의 기대수익률(期待收益率) 위주의 요일효과(曜日效果) 분석에서 주식수익률(株式收益率)의 분산(分散) 즉, 변동성(變動性)에 촛점을 두어 분석하였으며, 이는 투자자의 정확한 위험측정(危險測定)수단의 제공이라는 면에서 의의(意義)가 있을 것으로 생각된다.據金) 운용(運用)에 관한 정책수립시(政策樹立時) 금융선진국(金融先進國)의 증거금(證據金) 정책운용(政策運用)을 통한 시장관리(市場管理) 경험(經驗)을 어느 정도 참고할 수 있음을 시사한다고 할 것이다. 한다. 실증분석결과는 본문의 <표 1>에 제시되어 있으며 그 내용을 간략하게 요약하면 다음과 같다. (A) 실증분석모형 : 본 연구에서는 다기간 자산가격결정모형중에서 대표적인 Lucas (1978)모형을 직접 사용한다. $$1={\beta}\;E_t[\frac{U'(C_{t+1})\;P_t\;s_{t+1}}{U'(C_t)

• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.6
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• pp.841-847
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• 1993

The evaluation methods of the splicing loss in attenuation characteristics of optical fiber were measured and analyzed presently, the splicing loss of single mode optical fiber is measured by the cut-back technique and the backscattering technique. Comparing the splicing loss measured by above two technique, evaluation method of splicing loss measured by backscattering technique (OTDR) shall be calculated by the splicing loss is occurred due to difference of the backscattering coefficient in the spliced fibers. Thus. this analysis of the splicing loss is certainly applied in installation of the optical fiber cables for management of the data.

• The Korean Journal of Financial Management
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• v.16 no.2
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• pp.91-118
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• 1999

본(本) 연구(硏究)는 기업(企業)의 소유구조(所有構造)와 기업가치(企業價値) 사이의 관계를 분석하여 횡단면(橫斷面) 요인(要因)과 시계열(時系列) 요인(要因)을 결합하는 이론적(理論的) 모형(模型)을 제시하며, 또한 제시된 모형(模型)을 한국증권시장(韓國證券市場)의 자료(資料)를 이용하여 실증적(實證的)으로 분석하여 절충가설이 우리나라 기업에 적용될 수 있는지를 검토하였다. 본(本) 연구(硏究)에서는 기업가치(企業價値)를 나타내는 대용변수(代用變數)로 시장가치 대 장부가치비율을, 독립변수(獨立變數)로는 대주주 1인 지분율을 그리고 통제변수(統制變數)로는 광고비 정도, 기업규모, 재무레버리지, 30대 재벌 비재벌의 가변수(假變數)를 사용하였다. 실증분석 결과 본(本) 연구(硏究)에서 제시된 모형이 상당한 의미를 가지나, 모형(模型)의 설명력(說明力)은 비교적 낮아 본(本) 연구(硏究)에서 제시된 설명변수(說明變數)들이 자본구조(資本構造)의 변동(變動)을 8%정도 설명하고 있다. 또한 본(本) 연구(硏究)에서 제시된 독립변수 대주주 1인의 지분율과 이를 제곱한 것은 통계적으로 의미가 있는 변수가 되고 있다. 이는 대주주 1인의 지분율과 기업가치(企業價値) 사이에는 곡선관계(曲線關係)가 존재한다는 절충가설(折衷假說)을 지지하는 강력한 증거이다. 그리고 본(本) 연구(硏究)에서 제시된 통제변수(統制變數)인 광고비 정도, 기업규모, 재무레버리지 그리고 30대 재벌 비재벌 가변수(假變數) 등은 기업가치(機業價値)를 결정하는 통계적인 의미를 갖는 변수로 밝혀졌으며 회귀계수(回歸係數)의 부호도 기대하였던 바와 일치하고 있다.

• Journal of Korean Society of Transportation
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• v.18 no.4
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• pp.107-115
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• 2000

We suggest a method which solves the planar, two vehicle collision reconstruction problem. The method based on the Principle of impulse and momentum determines the pre-impact velocity components from Post-impact velocity components, vehicle Physical data and collision geometry. A novel feature is that although the impact coefficients such as the restitution coefficient and the impulse ratio are unknown, the method can estimate automatically the coefficients and calculate the pre-impact velocity components. This reverse calculation is important for vehicle accident reconstruction, since the pre-impact velocities are unknown and Post-impact Phase is the starting Point in a usual collision analysis. However. an inverse solution is not always Possible with the analytical rigid-body impact model. Mathematically, one does not exist under the common velocity condition. On the other hand, our method has a capability of reverse calculation under the condition if the absorbed energy during the collision process can be estimated using the crush profile. To validate the developed collision reconstruction a1gorithm, we use car-to-car collision test results. The analysis and experimental results agree well in the impact coefficients and the Pre-impact velocity components.

• Journal of Agricultural Extension & Community Development
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• v.21 no.4
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• pp.1149-1189
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• 2014

Nowadays, many farmers use online management diagnosis tool developed by Rural development agency(RDA) for the purpose of self-diagnosis of their farm management. Database(DB) was created using the diagnosis results and has been used for agri-firm management consulting. However, the amount of diagnosis data in the DB has been decreasing year by year. This means that the diagnosis tool of RDA did not reach farmers' expectation. Therefore it is necessary to develop a practical consulting tool which is applicable for various types of agri-firm management. This study introduces a management diagnosis tool and consulting method based on multi-contingency organization theory and value chain model for the purpose of improving existing tools and methods. The consulting method based on multi-contingency organization theory shows the core strategy of agri-firms by two different ways such as "efficiency-oriented" direction and "effectiveness-orientated" direction. Also, this method emphasizes that the performance of firm can be achieved when subelements of firm activities follow the same direction with the orientation of core strategy. The important thing is the right firm management activity fitted to its strategic direction. Through this action, limited firm resources can be optimized. In order to make itself understand, this study shows a practical example applied by this method from actual agri-firms.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.12
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• pp.8800-8811
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• 2015

When the crucial role of the agent in communicating with the customer is acknowledged well enough to relieve the agent's stress, it will lead to the decrease of the agent's emotional labor and the improvement of the business organization's performance simultaneously. However, the research on the relationship between information system and the emotional labor has been scarcely conducted even though the importance of the emotional labor is actively researched and discussed these days. Therefore, much effort has been put in this study to fine out how the quality of airline call center information system affects expectations-conformation and how expectations-conformation and self-efficacy affect performance of Emotional Labors. Analysis of the results to target a call center agent 436 people, When you provide them with quality information systems, it increased satisfaction and pride in their job. This mechanisms subsequently reduces the strength of the emotion labor, which ultimately improves the service performance. The implications of this study can be summarized as following: First, this research presented practical guidelines to the organization's decision-makers related to the airline call center operations in order to introduce and expand successful call center information system. Second, this research suggested the possible method to inspect and diagnose the system by way of applying the measurement model mentioned in this research into the airline information system and analyzing it. Third, the performance-measuring model developed in order to measure the performance of the airline call center information system can also be used when we carry out the performance-measuring task in the similar information system as the basis of diagnosing the situation and presenting the driving directions.

• Journal of the Korean Society of Clothing and Textiles
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• v.30 no.3 s.151
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• pp.436-446
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• 2006

The purpose of this study was to compare the influences of men's and women's sex role identities and sex role discrepancies on their appearance satisfaction and self esteem. Congruency theory, androgyny theory, masculinity theory and self discrepancy theory were used to explore the influence of sex roles on appearance satisfaction and self esteem. Theories suggest that the influence would be different by gender. Data were collected from a convenience sample of 125 men and 197 women aged between 20 and 40 years living in the Seoul metropolitan area. Structural equation modeling was employed to analyze the data. For men, both appearance satisfaction and self esteem were influenced only by their perceived masculinity. For women, however, perceived femininity, femininity discrepancy and masculinity discrepancy had an influence on appearance satisfaction. All the four sex role variables had an influence on women's self esteem. BMI had a negative effect on self esteem for women, but no effect for men. According to the results, unlike men, whose appearance satisfaction and self esteem are only determined by how masculine they are, the women's levels of appearance satisfaction and self esteem are influenced not only by how feminine they are, but also by how masculine and feminine they want to be. The results of this study have implications for body image counselors or practitioners who try to help young women increase their self esteem and satisfaction to their appearance.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.3
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• pp.724-731
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• 2016

This paper presents the interdisciplinary study of a combined mechanism on the interactions between ground and foot using bioengineering and geotechnical engineering. A new mechanism of advanced technology shoes, which can be made safe with a comfortable gait on both soft and hard ground, were developed combining the mechanism of conical top foundation. The experimental tests were carried out to verify the developed shoes. The prototype shoes and test grounds were designed and produced to perform the tests. The general existing shoes and advanced technology shoes were used to measure the pressures re-acting the sole during the tests by a special measurement system. The results clearly showed that the pressures acting on the sole of advanced technology shoes were distributed uniformly compared with that of the existing shoes, and were in good agreement with theoretical approach of the new mechanism. Therefore, the advanced technology shoes could allow a safe gait ergonomically by a new mechanism on any ground type. The load transfer could occur by the interaction between ground and shoes. In addition, these results are expected to be useful for the development of an interdisciplinary study of a new mechanism in the future.

• Korea journal of population studies
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• v.25 no.1
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• pp.83-111
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• 2002

This study examines the structure of intergenerational relationship and its effects on old-age security of the Korean society. Of interest is the effects of the middle aged's attitudes on old parents'security on their intergenerational exchange relationship and on their own old-age security as well. This study also attempts to test the applicability of the social exchange perspective to the study of intergenerational support relationship in Korea The social exchange perspective considers intergenerational relationship as an exchange of aids and rewards between generations. However due to strong norm of filial duty and inadequate welfare system, supporting old parents is regarded as younger generation's duty in Korea This study utilizes a survey data conducted by Kim et al.(2000). Major findings can be summarized as follows. First, the middle aged who gives one-sided supports to their parents tends to have the traditional attitude on old parents' security. It implies that intergenerational support relationship in Korea is not consistent with the explanations from the social exchange perspective. This study suggests a 'chained reward system'as an altermative explaining the intergenerational relationship. Second, an absolute majority of the middle aged tend to think that they are responsible for their own old-age security regardless of the pattern of intergenerational support relationship and attitudes on old parents' security. It implies that the middle aged in Korea holds the status of 'marginal men' who supports their parents but can't take the similar supports from their children.