• Journal of the Korean Society for Railway
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• v.12 no.5
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• pp.605-612
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• 2009

The purpose of this article is to empirically suggest the necessity of reconsidering the new aptitude factors such as the ability to withstand work stress, to handle unusual events, and to work independently, in the respect that the environmental change in railway safety-critical worker's job should be flexibly reflected in the current aptitude management system. Besides, several ways of reducing the stress level for the railway safety-critical workers were suggested as well.

• Journal of the Korean Society for information Management
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• v.6 no.2
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• pp.45-68
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• 1989

A contingency theory is employed to design off ectively a library system. We examine the influence of the contingency variables ill the library system. It is shown that the adoption of the contingency variables nay improve the efficiency of the library system.

• Journal of Korean Society of Transportation
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• v.19 no.1
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• pp.149-157
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• 2001

내부순환로 교통관리시스템은 기존의 국내 교통 시스템들과는 달리 충분한 수집체계와 정보제공 체계를 갖추고 있으며, 전략의 구체화와 현실적 실현, 즉 전략의 시스템화를 위해 많은 노력을 기울였다. 그런 노력의 일환으로 이 시스템에서는 다양하고 복잡한 돌발상황을 단순화하고 일반화하기 위해 Uniform Event Reaction Formula라 하는 개념을 사용하였다. 이 개념은 어떤 돌발상황이 발생하면 이로 인해 영향을 받는 반응 영역과 영향을 받지 않는 비반응 영역으로 분리한 후, 반응 영역은 예측을 통한 제어 관리를 수행하고, 비반응 영역은 통상적인 제어 관리만을 수행함을 의미한다. 그러나, 돌발상황에 따른 반응 영역과 비반응 영역의 결정에 필요한 돌발상황 처리시간 예측과 대기행렬 예측 모형은 내부순환로의 도로 및 교통환경에 적합한지 검증되지 않아 많은 시행착오가 예상된다. 특히, 돌발상황의 처리시간 예측은 동질대응 구간 결정의 가장 중요한 요소로서, 현재는 처리시간에 상당한 여유를 두어 운영할 계획이지만 궁극적으로는 내부순환로에 적합한 처리시간 예측 모형의 개발이 필요할 것으로 판단된다.

• Journal of Korean Society of Transportation
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• v.20 no.3
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• pp.17-30
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• 2002

Incident duration prediction is one of the most important steps of the overall incident management process. An accurate and reliable estimate of the incident duration can be the main difference between an effective incident management operation and an unacceptable one since, without the knowledge of such time durations, traffic impact can not be estimated or calculated. This research presents several multiple linear regression models for incident duration prediction using data consisting of 384 incident cases. The main source of various incident cases was the Traffic Incident Reports filled out by the Motorist Assistant Units of the Korea Highway Corporation. The models were proposed separately according to the time of day(daytime vs. nighttime) and the fatality/injury incurred (fatality/injury vs. property damage only). Two models using an integrated dataset, one with an intercept and the other without it, were also calibrated and proposed for the generality of model application. Some findings are as follows ; ?Variables such as vehicle turnover, load spills, the number of heavy vehicles involved and the number of blocked lanes were found to significantly affect incident duration times. ?Models, however, tend to overestimate the duration times when a dummy variable, load spill, is used. It was simply because several of load spill incidents had excessively long clearance times. The precision was improved when load spills were further categorized into "small spills" and "large spills" based on the size of vehicles involved. ?Variables such as the number of vehicles involved and the number of blocked lanes found not significant when a regression model was calibrated with an intercept. whereas excluding the intercept from the model structure signifies those variables in a statistical sense.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.228-231
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• 2004

Recently, a risk management in the construction project is getting more important. But the field application cases of risk management and its performance level that have been worked in the construction field are so rare and poor, because an application criteria on the risk management technique is not established systematically. So in order to apply of risk management in the field more successfully, it is necessary to optimize the technique of situational application on the risk management. The purpose of this study proposes the optimized application criteria in the field risk management based on the three categories such as historical data, experts, and analysis time.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.727-728
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• 2017

Recently, various accidents caused by reagents in laboratories have demanded a safety management system suitable for the danger situation. The existing system operated the equipment according to the temperature and humidity change inside the reagent cabinet, but the operation of the device corresponding to the danger situation and the countermeasures against many dangerous situations are insufficient. In order to solve this problem, this paper proposes a reagent cabinet safety management system based on the reagent cabinet danger priority in happen of accidents caused by reagents under management. The danger priority is type of reagents and selected by the danger situation that can be caused by the reagents. If a danger situation occurs, operate the device according to the selected danger priority and the type of danger situation. It is considered that the reagent cabinet can be safely managed by checking the danger situation in the reagent cabinet and operating the device according to the danger priority.

• KSCI Review
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• v.14 no.1
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• pp.165-173
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• 2006

To support service based on context-aware in ubiquitous computing environment, there are required context managing, context reasoning and context modeling technologies. In this paper, we propose a hierarchical ontology-based context management model and design a context-aware middleware based on this model for supporting active application adaptability and reflecting users' requirements dynamically in contextual changes. It also provides efficient support for inferencing, interpreting, acquiring and discovering various contexts to build context-aware services and presents a resolution method for context conflict which is occurred in execution of service. The proposed middleware can support the development and operation of various context-aware services, which are required in the ubiquitous computing environment.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.12
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• pp.5873-5877
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• 2011

In this paper, we propose a study of analysis to the mobility of object such like pedestrian in safety management zone. If unusual situation is detected in safety management zone, it's designed that previous agreed mission will be processed. By human resource, safety management zone cannot be detected continuously so that through the induction of such detection system the reliability of area can be obtained. Hence, in this paper we propose the reaction scheme to detect special situation by object detection. By using sensor based processing system proposed by this paper, the detection of mobility and unusual situation can be implemented.

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.137-138
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• 2016

본 논문에서는 고유가와 기후변화의 시대인 21세기에 따라 에너지 사용량, 시설관리 비용을 절감하고자 OSGi기반 플랫폼인 openHAB을 이용 상황인지 자동화 건물관리 시스템을 개발하고자 한다. 개인화 디바이스에서 사무실 제어 할 수 있으며 상황에 따라 사물들을 자동화 제어 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.04a
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• pp.1053-1054
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• 2009

무선 센서네트워크에서 지상시설물 관리를 위하여 대상 시설물에 대한 이벤트 발생 메시지 및 상황보고 메시지에 의한 데이터 수집 및 분석에 따르는 기존의 방식에 의해서는 시설물 상황 파악의 한계를 가지고 있다. 따라서 본 논문에서는 기존의 무선 센서네트워크에 적용되는 게이트웨이 기술에 영상 카메라를 이용한 영상제어 게이트웨이를 제안한다. 영상제어 게이트웨이를 적용함으로서 이벤트가 발생한 해당 센서노드에 대한 상황을 영상으로 인지하고 운용자 및 관리자의 시각적인 영상 정보 확인으로 관리대상 시설물의 상황 파악에 대한 정확도 및 신뢰도를 증대시킬 수 있다.