• Asia pacific journal of information systems
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• 제3권1호
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• pp.125-154
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• 1993

Almost all result for group decision support systems (GDSS) have been obtained in a United States context, based on conventions and culture of American group processes. This paper reports on the construction and testing of a prototype GDSS to support international negotiation. The system was shown to work and to provide gains in both the quality of the interaction and the attitude toward the decision reached. Although the prototype system is narrow in scope, focusing on two specific cultures and a single scenario and uses simple and limited technology, the results obtained suggest that computer-based intercultural GDSS can help people in staving focused, in managing the added complexity of multinational negotiation, and in interacting effectively with one another.

• 한국정보통신학회논문지
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• 제17권11호
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• pp.2653-2660
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• 2013

대표적인 수면장애로 수면 무호흡증과 코골이가 있다. 하지만 기존에는 수면장애 측정과 진단만 이루어지고 그 원인을 파악하는 연구는 미비하였다. 따라서 본 논문에서는 이를 보완하기 위해 멀티센서를 기반으로 한 수면장애 개선 시스템을 제안한다. 본 논문에서는 제안한 시스템을 설계하기 위해 전체 시스템의 구성을 파악하고 데이터의 흐름을 설계하였다. 설계한 시스템을 구현하기 위해 사용자 인터페이스 및 모바일 애플리케이션은 안드로이드 기반으로 구현하였다. 본 논문에서 설계 및 구현한 시스템의 결과의 정확도를 테스트하기 위해 테스트 시나리오를 작성하였다. 테스트 시나리오에 따른 수면 장애 요인 값을 변화시키며 추론 결과의 정확도를 테스트 한 결과 제안한 수면장애 개선 시스템이 정확하게 동작함을 확인하였다.

• 대한조선학회논문집
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• 제59권4호
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• pp.200-206
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• 2022

This study is to develop database by an experimental method for the development of condition based maintenance for auxiliary equipment in marine engine systems. Existing ships have been performing regular maintenance, so the actual measurement data development is very incomplete. Therefore, it is best to develop a database on land tests. In this paper, a database developed by an experimental method is presented. First, failure case analysis and reliability analysis were performed to select a failure mode. For the failure simulation test, a test bed for land testing was developed. The failure simulation test was performed based on the failure simulation scenario in which the failure simulation test plan was defined. A 1.5TB failure simulation database has been developed, and it is expected to serve as a basis for ship failure diagnosis and prediction algorithm model development.

• 정보처리학회논문지B
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• 제11B권7호
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• pp.759-768
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• 2004

생체인식기술을 응용한 제품이 다양해지면서 상호운용성의 문제가 제기되어 국제표준화가 진행중인 BioAPl(Biometric Application Pro-gramming Interface)를 기반으로 한 생체인식 제품의 개발이 증대되고 있다. 그러나 BioAPl를 적용하여 개발된 제품에 대한 성능 측정 및 표준규격의 적합성 여부에 대한 신뢰성 있는 평가 도구가 마련되어 있지 않은 상태이다. 본 논문은 생체인식시스템이 BioAPl 규격의 요구사항 및 기준에 얼마나 만족하여 개발하였는가를 검증하기 위한 적합성시험 방법을 연구하였다. 제안된 적합성 시험기술의 첫 번째는 BioAPl명세서가 제공하는 각 함수들을 제대로 구현하였는가에 대한 확인과 사용여부를 평가하는 것이다. 이것은 응용에서 APl(Application Provider Inter-face)함수를 호출하면 프레임워크를 통해 BSP(Biometric Service Provider)를 실행하는 것으로 이때 파라미터와 선행함수의 선택이 필요하다. 두 번째는 BioAPl의 해당 테스트케이스를 분석하여 모듈관리, 핸들기능, 검증기능에 대한 시나리오를 평가하는 것이다. 실험은 BioAPl 컨소시엄에서 제공하는 샘플프로그램과 상용 지문검증시스템의 BSP를 사용하여 제안하는 적합성 평가 방법에 대한 실험을 수행하였다. 이에 따라 BioAPl를 기반으로 한 BSP들이 요구사항에 적합하게 개발되었는지를 판단할 수 있었다.

• Ocean Systems Engineering
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• 제10권2호
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• pp.163-179
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• 2020

Considering the huge demand of several types of subsea equipment, as Christmas Trees, PLEMs (Pipeline End Manifolds), PLETs (Pipeline End Terminations) and manifolds for instance, a critical phase is its installation, especially when the equipment goes down through the water, crossing the splash zone. In this phase, the equipment is subject to slamming loads, which can induce impulsive loads in the installation wires and lead to their rupture. Slamming loads assessment formulation can be found in many references, like the Recommended Practice RP-N103 from DNV-GL (2011), a useful guide to evaluate installation loads. Regarding to the slamming loads, RP-N103 adopt some simplifying assumptions, as considering small dimensions for the equipment in relation to wave length, in order to estimate the slamming coefficient C_S used in load estimation. In this article, an experimental investigation based on typical subsea structure dimensions was performed to assess the slamming coefficient evaluation, considering a more specific scenario in terms of application, and some reduction of the slamming coefficient is achieved for higher velocities, with positive impact on operability.

• 한국시스템다이내믹스연구
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• 제5권2호
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• pp.199-216
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• 2004

The present study is aimed at developing the optimal instruments for dispelling the uncertainty factors during the formulation of strategies for corporate development. The objective is the creation of a complete model of strategic analysis, which encompasses both the environment (internal and external) and the management rational component. This model -built on the analysis of three corporate cases - is concretized by a simulation for testing the strategy by the means of software which enables the users to cope with a dynamic and complex corporate environment. The research questions regard the development of a complete strategic analysis, which covers the entire decision-making process; the concrete assessment of the business strategy on the basis of quantitative data: the identification and enhancement of the critical variables of business administration, in such a complex and dynamic reality as the corporate environment.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2007년도 한국컴퓨터종합학술대회논문집 Vol.34 No.1 (C)
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• pp.376-379
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• 2007

오늘날 컴퓨팅 기능의 급격한 발달은, 시스템의 효율뿐만 아니라 지능화에 대한 요구를 증대시키고 있다. 지능화된 서비스를 성공적으로 제공하기 위해서는, 제공하려는 도메인에 대한 지식 처리 기능이 필수적이다. 시스템의 지능적인 행동은 그 시스템이 보유하고 있는 지식의 질(質)에 영향을 받기 때문에, 사용되는 지식의 질적 우수성을 보장하려는 시도가 이루어지고 있지만, 문제는 지식의 질이 높아질수록, 지식 관리의 비용이 증가한다는 점이다. 따라서 품질과 비용 사이의 균형점을 맞추기 위한 노력이 필요하다. 이에 본 논문에서는 사용하려는 지식의 품질과 시스템에서 요구하는 지식의 품질을 비교함으로써, 이 균형점을 맞추는 방법을 제안한다. 이를 위해, 시스템이 제공하려는 서비스 시나리오를 대상 지식으로 표현 및 처리한다. 시스템 관리자는 이 결과를 바탕으로 채택하려는 지식과 자신의 시스템 사이의 괴리를 손쉽게 판단 할 수 있고, 그 차이를 없애기 위해 지식의 확장 및 축소의 부분을 결정하고, 수정할 수 있다.

• ETRI Journal
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• 제39권3호
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• pp.364-372
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• 2017

For the reliability of controllers in a software defined network (SDN), a dynamic and self-learning schedule method (DSL) is proposed. This method is original and easy to deploy, and optimizes the combination of multiple controllers. First, we summarize multiple controllers' combinations and schedule problems in an SDN and analyze its reliability. Then, we introduce the architecture of the schedule method and evaluate multi-controller reliability, the DSL method, and its optimized solution. By continually and statistically learning the information about controller reliability, this method treats it as a metric to schedule controllers. Finally, we compare and test the method using a given testing scenario based on an SDN network simulator. The experiment results show that the DSL method can significantly improve the total reliability of an SDN compared with a random schedule, and the proposed optimization algorithm has higher efficiency than an exhaustive search.

• 대한간호학회지
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• 제41권4호
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• pp.433-443
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• 2011

Purpose: Clinical training for nursing students is limited to rudimentary skills to avoid potential risks. Simulation-Based Training (SBT) can overcome the shortcomings of clinical training. We evaluated the educational effect of SBT for obstetrical nursing students using high-fidelity simulation courses. Methods: We developed a simulation program for obstetrical nursing students to practice nursing skills that are necessary to provide quality care. The program consisted of four sessions. 1st: An orientation and a preliminary test. 2nd: Learning core skills required in obstetrical nursing. 3rd: Testing each student with scenario. 4th: Providing a debriefing session. At the beginning of the program, students were surveyed about their self-confidence in obstetrical nursing care, and at the end of the program, they were surveyed about the adequacy of SBT as well as self-confidence. Results: Students' self-confidence showed a significant difference before and after simulation. Mean adequacy of SBT was $7.15{\pm}1.35$ (out of 10). Most students became more interested in Women's Health Nursing after SBT. Conclusion: The results from evaluating the effects of simulation-based obstetrical nursing training show that SBT provides invaluable clinical experience for obstetrical nursing students by overcoming the lack of actual clinical involvement in clinical training programs.

• Geomechanics and Engineering
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• 제12권1호
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• pp.161-183
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• 2017

This paper investigates the damage identification of the concrete pile element through axial wave propagation technique using computational and experimental studies. Now-a-days, concrete pile foundations are often common in all engineering structures and their safety is significant for preventing the failure. Damage detection and estimation in a sub-structure is challenging as the visual picture of the sub-structure and its condition is not well known and the state of the structure or foundation can be inferred only through its static and dynamic response. The concept of wave propagation involves dynamic impedance and whenever a wave encounters a changing impedance (due to loss of stiffness), a reflecting wave is generated with the total strain energy forked as reflected as well as refracted portions. Among many frequency domain methods, the Spectral Finite Element method (SFEM) has been found suitable for analysis of wave propagation in real engineering structures as the formulation is based on dynamic equilibrium under harmonic steady state excitation. The feasibility of the axial wave propagation technique is studied through numerical simulations using Elementary rod theory and higher order Love rod theory under SFEM and ABAQUS dynamic explicit analysis with experimental validation exercise. Towards simulating the damage scenario in a pile element, dis-continuity (impedance mismatch) is induced by varying its cross-sectional area along its length. Both experimental and computational investigations are performed under pulse-echo and pitch-catch configuration methods. Analytical and experimental results are in good agreement.