• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.5
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• pp.1277-1283
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• 2010

Many e-learning systems adopts SCORM as an e-learning standard. E-learning systems evaluate and apply the learning difficulty in order to improve the studying efficiency. But, it is hard to change the learning difficulty and provide the customized learning contents during studying in SCORM. Because it is difficult to provide the customized contents to learners by changing the learners' level at runtime and to control optional learning. In this paper, we designed and implemented SCORM-based Contents Organization System on learners' level(SCOS) for complementing the SCORM's weakness. SCOS re-evaluates a learner's level whenever the learner's level is changed during learning, and provides customized contents on the learner's level.

• Journal of the Korean Geotechnical Society
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• v.28 no.8
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• pp.5-19
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• 2012

Vertical drains along with the preloading technique have been commonly used to enhance the consolidation rate of dredged placement formation. In practice, vertical drains are usually installed in the process of self-weight consolidation of a dredged soil deposit because this process takes considerable time to be completed, which makes conventional analytical or numerical models difficult to quantify the consolidation behavior. In this paper, we propose a governing partial differential equation and develop a numerical model for 2-D axisymmetric non-linear finite strain consolidation considering self-weight consolidation to predict the behavior of a vertical drain in the dredged placement foundation which is installed during the self-weight consolidation. In order to verify the developed model in this paper, results of the numerical analysis are compared with that of the lab-scaled self-weight consolidation test. In addition, the model verification has been carried out by comparing with the simplified method. The comparisons show that the developed model can properly simulate the consolidation of the dredged placement formation with the vertical drains installed during the self-weight consolidation. Finally, the effect of construction schedule of vertical drains and of pre-loading during the self-weight consolidation is examined by simulating an imaginary dredged material placement site with a thickness of 10 m and 20 m, respectively. This simulation infers the applicability of the proposed method in this research for designing a soil improvement in a soft dredged deposit when vertical drains and pre-loading are implemented before the self-weight consolidation ceases.

• Information Systems Review
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• v.19 no.3
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• pp.105-125
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• 2017

Although the relationship between social networking sites (SNS) use and performance has been widely studied, most of these studies have focused on comparing the SNS users' overall performance with that of non-SNS users instead of examining how using SNS midway of a task affects one's task performance. To address this research gap, an experiment was conducted to examine SNS use during a task and its influence on the performance of that task. In this experiment, the role of SNS in various situations was examined by reviewing the literature on break and performance as well as the types of breaks and tasks. Owing to its exploratory nature, this study used various types of data, such as electroencephalography interpretation data generated from a brain-computer interface, self-reported data, and data recorded by a computer. Those participants who used SNS showed an improved performance compared with those who took a short break while doing a simple task. Further analysis showed that the degree of SNS usage and engagement with SNS had positive effects on the participants' simple task performance, while social presence and reassurance of self-worth had negative and positive effects on the participants' complex task performance, respectively.

• The Journal of the Korean dental association
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• v.22 no.5 s.180
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• pp.393-396
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• 1984

치과마취시의 응급사항이란 마취를 시행하는 도중이나, 후에 정상적으로 기대되었던 현상외의 변이로 나타난 합병증과 같다고 생각되며 이들 합병증의 치료를 소홀히 하였을때 치명적인 상태까지도 도달할 수 있다. 마취의 효과는 주사침이 조직내로 자입된 후, 마취액이 주입되어 해당신경이 분포되는 부위에 동통감각이 소실됨으로써 얻어지게 된다. 그러므로 주사침의 자입시나 주입된 마취액에 의한 부작용이 없어야 한다.

• Proceedings of the Korean Magnestics Society Conference
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• 1997.05a
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• pp.114-115
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• 1997

• KAPE Magazine
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• s.147
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• pp.6-7
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• 2008

좋은 고기를 얻기 위해서는 도축하기 전에 가축을 가능한 한 안정시키지 않으면 안 된다. 소와 돼지는 도축장에 출하될 때 거의 트럭에 실려 오는 것이 일반적인데 운송도중에 차안에서 타박상을 입거나 골절되는 경우가 많기 때문에 주의가 필요하다. 뿐만 아니라 시간을 절약하기 위해 적정두수를 벗어나 과도하게 많이 적재하는 경우가 많기 때문에 여름과 같이 온도가 높은 때는 질식사하는 가축도 발생한다.

• The Journal of the Korean dental association
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• v.41 no.7 s.410
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• pp.492-497
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• 2003

수복 치료 중의 환자에게 있어서 나타나는 민감증은 치과의사를 곤혹스럽게 하는 문제 중의 하나이다. 치과치료도중 나타나는 민감 증의 원인은 매우 많지만 이 중, 진료실에서 가장 많이 겪게 되는 대표적인 몇 가지 문제점과 해결 방안을 살펴 보고자 한다.

• 대한정형외과스포츠의학회:학술대회논문집
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• 2006.09a
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• pp.6-6
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• 2006

• Proceedings of the KIPE Conference
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• 2014.11a
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• pp.127-128
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• 2014

고속 제어 처리 시스템의 신뢰성 확보를 위한 방법으로 시스템을 이중화로 구성한다. 이중화란 동일한 부품이나 장비로 구성하여 정상 동작 도중 오류가 발생하여도 다른 정상 부품 또는 장비로 하여금 정상 동작을 유지하도록 하는 것이다. 다양한 이중화 시스템의 구성 방안과 구조와 특징을 통해 시스템에 맞는 이중화 방안을 제안한다.

• Electric Engineers Magazine
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• v.176 no.4
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• pp.8-27
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• 1997

산업단지에 전기를 공급하기 위한 전기시설 공사비를 전기공급자가 전액 부담하게 하고 현재 운영되고 있는 각종 의무고용제도중 국민의 안전 및 환경의 보호와 밀접한 관련이 없는 부분은 폐지하거나 완화하며, 각종 영업에 대한 불필요한 행정규제를 완화함으로써 기업의 경쟁력을 강화하려는 것임.