• The Journal of Engineering Geology
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• v.6 no.3
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• pp.111-118
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• 1996

In general, a three dimensional ground behaviour during tunneling is simulated by using two dimensional analysis programs in consideration of a certain ratio of stress or strain distribution to take into account the effect of construction stage by a tunnel face advance. A series of trree dimensional analyses was conducted to deduce a normalized displacement (surface or crown settlement) curve in longitudinal direction, of which curve is reflecting an effect of a tunnel advance under a various condition. And, by using try and error technique, two dimensional analyses were carried out to determine an optimum stress distribution ratio for a settiement curve coincided with the curve obtained by three dimensional analyses. Finally, monitored results from a subway tunnel were compared with two dimensional analysis results for varification of the deduced stress distribution ratio as well as the two dimensional analysis program employed in this study.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10a
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• pp.506-508
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• 1998

전세계가 정보화 열풍을 겪고 있는 시점에서, 엄청난 사용자들이 다양한 인터넷 서비스 중 전자우편 서비스를 생활의 일부분으로 사용하고 있다. 그러나 기존의 전자우편 서비스만을 제공하는 환경하에서는 많은 보안 위험요소 들이 존재하고 있으며 전자우편 서비스의 사용에 많은 제약과 노출 위험 가능성을 안고 있다. 이러한 문제점들을 극복하기 위한 노력들이 이미 기울여져 다양한 방법으로 해결책을 제시하고 있지만 아직 완전한 형태의 결과물이 나오지 못하고 있다. 그 중 대표적인 PEM은 구현의 어려움으로 인하여 보편화되지 못하고 있으며, 또 다른 제품의 PGP는 키 인증 등의 문제점을 안고 있는 실정이다. 또한 이들 제품들은 전자우편 보안 요구사항들을 모두 충족시켜주지 못한다는 문제점들도 안고 있다. 본 논문에서는 위에서 언급했던 제품들이 안고 있는 문제점들을 극복할 수 있는 다른 해결책을 내 놓기 위해 모든 보안 요구사항을 만족할 수 있고 사용하기 편리한 전자우편 보안 프로토콜을 설계하였다. 이를 위해서 비대칭키 방식인 키 분배서버를 이용하며, 하부 사용자는 키 분배 서버에 의존해 기밀성 및 무결성등 정보보호 서비스를 제공 받을 수 있다.

• KDI Journal of Economic Policy
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• v.36 no.2
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• pp.137-174
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• 2014

This paper examines whether the TFP growth of the Korean economy slowed down in 2000s based on growth accounting, focusing on how sensitive the results are to the particular aspects of the growth accounting method. There has been no consensus on this issue as the previous studies have provided very diverse results due to the differences in the details of the growth accounting method. Main results of this paper are as follows. First, it is how to calculate the labor income of the self-employed that has the most significant impacts on the estimated TFP growth. Measuring capital stock also matters. Second, the TFP growth of the Korean economy appears to be sustained in 2000s when the extreme assumptions on the labor income of the self-employed are excluded and capital stock is measured by the most frequently-adopted method in the previous studies. For more reliable estimation of the TFP growth, further studies on measuring the labor income of the self-employed are needed.

• Journal of the Economic Geographical Society of Korea
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• v.5 no.2
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• pp.293-302
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• 2002

China in the era of economic transition has conducted the housing reform policy over the past 20 years. Housing providing systems have changed from the free distributing housing system under the governmental planning to the monetary housing system for individual customers. The 1998 monetary housing distribution policy, which ended the 20-year Chinese housing reform, departed from the direct distribution system that had blocked housing commodification. The purpose of the housing reform was to provide and reproduce housing without the expenses of the Chinese government and work unit (danwei), which is different from Russia. In order to achieve the housing reform, the Chinese government introduced various policies, which enabled residents to purchase housing by themselves. However, it took long for residents, who had taken government's welfare system granted, to accept housing as goods. In addition, the Chinese government's efforts to reproduce housing by market systems failed because housing was closely linked to land and was expensive consumption goods, which differentiates housing from other goods that can be commodified through market prices and diverse ownerships. Accordingly, despite a political burden, the Chinese government waived the real distribution policy for housing. After the waiver, the housing commodification process excelled through the private housing markets.

• 월간 기계설비
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• s.275
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• pp.42-44
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• 2013

박근혜 정부가 건설업 체질개선을 위해 공공공사 분리발주 법제화를 국정과제로 채택함에 따라 대한설비건설협회는 분리발주 법제화가 실현될 수 있도록 많은 노력을 기울이고 있다. 그 일환으로 협회는 분리발주 법제화 필요성의 여론조성을 위해 언론사 인터뷰를 실시했다. 인터뷰에 참여한 언론사는 건설경제신문, 건설교통신문, 건설기술신문, 건설산업신문, 건설이코노미, 건설타임즈, 국토일보, 국토자원경제신문, 국토해양신문, 대한건설신문, 한국건설신문(가나다 순) 등 건설관련 일간 및 주간지 매체이다. 본지는 정해돈 회장 인터뷰 전문을 게재한다.

• Review of KIISC
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• v.15 no.1
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• pp.90-97
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• 2005

유비쿼터스 컴퓨팅은 향후 USN(Ubiquitous Sensor Network) 환경에서 구현될 것으로 예상되며, 유비쿼터스 컴퓨팅에서 RFID(Radio Frequency Identification)기술 기반의 응용 서비스들이 가장 먼저 활성화될 분야로 전망된다. RFID 분야에서의 보안은 RFID의 태그로 인한 프라이버시 침해가 가장 큰 문제점으로 인식되고 있으며, 기술적, 법적·제도적으로 개인의 프라이버시를 보장하기 위한 노력들이 진행 중이다. USN에서의 보안은 센서노드의 자원의 제약으로 인해 기존의 전통적인 보안과는 다른 관점에서의 접근이 필요하며, 키분배 및 관리, 안전한 라우팅 방법론, 센서네트워크에 대한 공격에 대한 안전한 네트워크 구축 등이 이슈들이다. 본 논문에서는 RFID와 USN의 보안 연구 대상에 대해서 살펴보고 이들에 대한 향후 연구 방향을 소개한다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2008.10a
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• pp.127-130
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• 2008

현대의 기업에서는 다양한 인적 자원과 비즈니스 솔루션을 이용하여 효율적인 기업 활동을 수행하기 위해 노력을 기울이고 있다. 하지만 현장에서 벌어지는 인적 자원의 능률에 대해 효율적으로 관리하고 상황에 맞게 업무를 배정하는 일은 매우 어렵다. 본 연구에서는 RFID(Radio-Frequency Identification)를 이용하여 현장 인력에 대한 정보를 실시간으로 수집하고 이 정보를 바탕으로 업무가 원활하게 이루어 질 수 있도록 하는 시스템을 제시한다. 전체적인 시스템의 구조와 데이터 모델을 구성하고 실시간 업무 분배규칙을 제시하였다. 본 연구를 통해 현장 작업의 효율성과 작업 배분의 공정성이 향상될 것으로 기대한다.

• The Journal of the Korea Contents Association
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• v.9 no.9
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• pp.313-324
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• 2009

This study purposes to analyze how the level of compensation system qualify(transparency, fairness, controllability) affects the satisfaction of employee concerned with compensation system and work efforts. To test above mentioned objectives, i conduct using the survey data directly survey and e-mail to the MBA students of university located In southeastern korea and analyze using the structural equation model. The results of this paper are as follows. First, the analysis results demonstrate a positive relationship between the level of compensation system qualify and the satisfaction of employee concerned with compensation system. Second, the level of compensation system quality positively affects employee' work efforts. Thirdly, the satisfaction of employee concerned with compensation system also positive effects on work effort. The above results mean that if the level of compensation system quality is higher, employee are satisfied with the compensation system, and increase the level of work effort.

• The Journal of the Korea Contents Association
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• v.17 no.6
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• pp.424-435
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• 2017

Because services are delivered through the behaviors of people, it is very difficult to do the quality control and services failures are often happened. If services failures are not recovered by appropriate methods, customers make the negative word-of-mouth communications and have the negative intention to repurchase. The service recovery paradox demonstrates the importance of service recovery after the service failures. The purpose of this study is to investigate the antecedents of customer satisfaction of service recovery(CS), and its consequences of the CS. Independent variables of CS are distributive justice, procedural justice, and interactional justice, and dependent variables of CS are negative word of mouth communication and intention to repurchase. Data are collected using the scenario method. Research model and hypotheses are tested empirically using the statistical packages such as SPSS and AMOS.

• Journal of the Korean School Mathematics Society
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• v.9 no.3
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• pp.265-286
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• 2006

Given that less attention has been paid to teachers than students in mathematics education, this study attempted to provide theoretical foundations to understand better mathematics teacher learning and teaching practice in transition. First, this paper summarized three conceptions of teacher learning on the basis of the relationships of knowledge and practice followed by several implications to mathematics teacher education. Second, this paper provided a brief overview of cognition as situated, social, and distributed. This paper then explored new implications and issues about mathematics teacher learning that the overview brought to light. It is expected for teacher educators and researchers to participate in rich discussion of many implicit issues about teacher learning that this paper begins to raise.