• Journal of Computing Science and Engineering
• /
• 제3권4호
• /
• pp.238-259
• /
• 2009

In this paper we discuss personal data management with mobile devices, an activity requiring the composition of services offered by standard suites of applications. We propose a data model and an interface model that allows users to define activities, tasks and services, to navigate among them according to the evolution of the personal situation as perceived and interpreted by the users themselves. The interface model acts as a lens exploring the situation, zooming into the details, covering different areas of the personal data, supporting the user in the role of a composer of personal services.

• Journal of Information Technology Applications and Management
• /
• 제14권2호
• /
• pp.11-26
• /
• 2007

In this paper we suggest a context-driven configuration model of virtual businesses to form a business network model consisting of role-based, interaction-centered business partners. The model makes use of the subcontext concept which explicitly represents actors and interactions in virtual business (VB) context. We separate actors who have capacities on tasks in a specific kind of role and actor subcontext which models requirements in specific interaction subcontext. Three kinds of actors are defined in virtual service chains, service user, service provider, and external service supporter. Interaction subcontext models a service exchange process between two actor subcontexts with consideration of context dependencies like task and quality dependencies. Each subcontext may be modeled in the form of a situation network which consists of a finite set of situation nodes and transitions. A specific situation is given in a corresponding context network of actors and interactions. It is illustrated with a simple example.

• 한국건설관리학회논문집
• /
• 제4권1호
• /
• pp.81-89
• /
• 2003

This research suggests the FD-AHP decision making model for Construction Projects which is composed of two main method to prevent a ranking invert situation ; First, to make the consensus of the experts consistent, we utilize Fuzzy-Delphi method to adjust the fuzzy rating of every expert to achive the consensus condition with the fuzzy linguistic presentation. Second, to handle vague linguistic presentation caused by expert's experiences and subjective judgement, we propose Fuzzy-AHP which is able to enhance precision of construction projects decision mating situation. Moreover, with the correlation analysis, we show that the validity of the FD-AHP model under a decision making task specially on where highly demanded expert's experiences and intuition.

• 한국재난정보학회 논문집
• /
• 제16권3호
• /
• pp.430-439
• /
• 2020

연구목적: 영향태풍 발생빈도가 증가하고 피해형태가 복잡해짐에 따라 재난대응 업무자가 사전에 태풍 상황을 인지할 수 있도록 지원해주는 정보의 필요성은 커져가고 있다. 이에 본 연구에서는 매년 주기적으로 발생하는 태풍의 재난대응 업무를 수행하는데 있어 업무 단계별 활용되는 정보에 대한 정의와 구축방안을 제안하였다. 연구방법: 2019년 한반도 영향태풍 7개를 대상으로 실제 업무 단계별 활용되었던 정보를 분류하고 상황인지를 위한 필요정보에 대한 분석을 실시하였다. 분석된 정보를 기반으로 중앙 및 지자체 업무담당자의 의견조사를 통해 태풍상황인지정보를 구축하였다. 연구결과: 태풍상황업무는 기상상황 모니터링과 피해상황을 공유하는 업무의 비중이 가장 컸으며 활용되는 정보는 이력정보와 상황정보의 융합을 통해 도출된 정보가 필요한 것으로 분석되었다. 결론: 태풍상황이 진행될수록 대응 부서 간 업무와 정보의 연계성이 증가하는 것으로 분석됨에 따라 향후 실제 태풍상황에 태풍상황인지정보를 적용하여 정보의 고도화 및 관련 체계를 정립하여야 한다.

• 한국초등수학교육학회지
• /
• 제20권4호
• /
• pp.601-625
• /
• 2016

본 연구는 비례추론 과제에 대한 초등예비교사들의 반응을 분석함으로써 예비교사들의 비례추론 과제에 대한 이해 정도를 살펴보고, 비례추론 전략에 따른 비례추론 과제의 적합도와 비례추론 과제에 따른 전략의 특징을 살펴보고자 하였다. 이를 위해 총 8개로 구성된 검사도구를 개발하여 초등예비교사 72명에게 적용하였으며, 연구결과를 종합하여 예비교사교육에서의 비례추론 지도에 대한 시사점을 다음과 같이 도출하였다. 예비교사들이 실제적이고 다양한 비례추론 과제들을 다루는 경험, 양적 관계에 대한 의식적인 분석을 행하는 경험, 예비교사들이 미흡한 이해를 보이는 특정 과제 유형에 대한 보완, 다양한 비례추론 전략들을 분류하고 탐구하는 경험, 비례추론 전략에 적합한 과제 유형을 파악하고, 비례추론 과제에 보다 유용하고 사용가능한 비례추론 전략을 파악하도록 하는 학습경험이 필요하다고 보았다.

• 대한인간공학회지
• /
• 제25권3호
• /
• pp.85-96
• /
• 2006

Main control room(MCR) man-machine interface(MMI) design of advanced nuclear power plants(NPPs) such as APR(advanced power reactor)-1400 can be validated through performance-based tests to determine whether it acceptably supports safe operation of the plant. In this work, plant performance, personnel task, situation awareness, workload, teamwork, and anthropometric/physiological factor are considered as factors for the human performance evaluation. For development of measures in each of the factors, techniques generally used in various industries and empirically proven to be useful are adopted as main measures and some helpful techniques are developed in order to complement the main measures. Also the development of the measures is addressed based on the theoretical background. Finally we discuss the way in which the measures can be effectively integrated and then HUPESS(HUman Performance Evaluation Support System) which is in development based on the integrated way is briefly introduced.

• 대한수학교육학회지:수학교육학연구
• /
• 제25권4호
• /
• pp.675-690
• /
• 2015

본 연구는 초등 예비교사에게 필요한 수학지식을 가르치는 효과적인 수단으로서 수학적 과제의 특징을 논의하고 그에 맞게 과제를 설계하고 교사교육에 실행한 사례를 제시하였다. 그 결과 예비교사들은 '격자점 정삼각형 만들기' 라는 수학적 과제를 해결하면서, 주어진 상황을 수학적 문제로 변환하고 기존 지식과의 연결을 통해 문제를 변형하고 해결하며, 기존의 수학적 개념을 새로운 관점에서 보는 경험을 할 수 있었다. 이러한 경험이 예비교사의 교육에 대한 관점의 변화와 어떻게 연결되는지 그리고 교사교육에 적합한 수학적 과제 설계를 위한 조건에 대해 논의하였다.

• Industrial Engineering and Management Systems
• /
• 제4권2호
• /
• pp.176-183
• /
• 2005

The theory of signal detection has been applied to a wide range of practical situation for a long time, including sonar detection, air traffic control and so on. In general, in this theory, sensitivity parametric index d' and bias parametric index $\beta$ are used to evaluated the performance of vigilance. These indices use observer's response "hit" and "false alarm" to explain and evaluate vigilance, but not considering reaction time. However, the reaction time of detecting should be considered in measuring vigilance in some supervisory tasks such as unlimited monitoring tasks (e.g., supervisors in nuclear plant). There are some researchers have used the segments of reaction time to generate a pair of probabilities of hit and false alarm probabilities and plot the receiver operating characteristic curve. The purpose of this study was to develop a quantitative vigilance-measuring model by fuzzy sets, which combined the concepts of hit, false alarm and reaction time. The model extends two-values logic to multi-values logic by membership functions of fuzzy sets. A simulated experiment of monitoring task in nuclear plant was carried out. Results indicated that the new vigilance-measuring model is more efficient than traditional indices; the characteristics of vigilance would be realized more clearly in unlimited monitoring task.

• 산업경영시스템학회지
• /
• 제21권47호
• /
• pp.57-68
• /
• 1998

Work environments have been changed with the advent of new technologies, such as computer technology. However, human cognitive limits can't pace up with the change of work environment. Designing human-computer system requires knowledge and evaluation of the human cognitive processes which control information flow workload. Futhermore, under limited reaction time and/or urgent situation, human operator may the work stress, work error and resultant deleterious work environment. This paper evaluate the visual factors of major information processing factors(information density, amount of information, operational speed of speed)on operator performance of supervisory control under urgent(limited reaction time)environments which require deleterious work condition. To describe the work performance int the urgent work situations with time stress and dynamic event occurrence, a new concept of information density was introduced. For a series of experiments performed for this study, three independent variables(information amount, system proceeding speed, information density) were evaluated using five dependent variables. The result of statistical analyses indicate that the amount of information affected on all of five dependent measure. Number of failure and number of secondary task score were influenced by both amount of information and operational speed of system. However reaction time of secondary task were affected by both amount of information and information density. As a result, the deleterious factors for the performances seemed to be a scanning time to supervise each control panel. Consequently, a new display panel was suggest to reduce operator work load for scanning task showing better operator performance.

• 한국안전학회지
• /
• 제24권4호
• /
• pp.104-110
• /
• 2009

In this driving simulation study, the impairing effects of various types of electronic devices usage(i. e., destination search by using in-vehicle navigation system, TV watching and dialing cellular phone) during driving on front-to-rear-end collision avoidance were investigated. Percentage of collisions, driving speeds when the drivers collided, and initial reaction time for collision avoidance were analyzed and compared as the dependent measures. The results indicated that (1) any types of electronic devices usage during driving induced more serious collision-related impairment than control condition where no additional task was required, and (2) in general, destination search task appeared to impair drivers collision avoidance performance more than the other task requirements in terms of percentage of collisions and initial reaction time for collision avoidance, but TV watching induced most serious collision impact. These results suggested that any types of electronic device usage could distract drivers attention from the primary task of driving, and be resulted in serious outcome in potentially risky situation of front-to-rear-end collision. In particular, mandatory use of eye-hand coordination and receiving feedback seemed to one of essential factor leading the drivers visual attentional distraction.