• 산업공학
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• 제22권4호
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• pp.368-375
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• 2009

This paper considers a two-stage supply system consisting of two make-to-stock facilities. The facility in the first stage produces a single type of component in anticipation of future demands from the market and the end item production while the facility in the second stage produces the end item in anticipation of future demands from the OEM customers. The facility in the first stage has the option of to accept or reject each incoming demand from the market. In this paper, we address the problem of how to control the exogenous component demand and how to manage the production of the end item and the component so as to maximize the system's profit subject to the system costs. In this paper, we present a heuristic policy that is the base-stock production policy combined with a linear switching curve for component demand control. Numerical study is implemented under different operating conditions of the system and it shows that the performance of the heuristic is very promising compared to that of the optimal policy for the Markov model.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -2
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• pp.735-738
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• 2002

This paper a new simple PWM (Pulse Width Modulation) signal generation based on modified relaxation oscillator is introduced. Its advantages of the proposed principle are that the precise PWM signal can be easily achieved with a high frequency range up to several megahertz and a low-voltage power supply. The proposed circuit can accept either voltage or current modulating signal. It is very suitable for developing into Integrated Circuits (ICs) form in communication applications. The simulation and experimental results are also depicted, they shown good agreement with theoretical anticipation.

• 천문학회보
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• 제42권2호
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• pp.51.3-51.3
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• 2017

We present a general N-body exoplanet simulator in anticipation of upcoming next generation telescopes. Illustrative examples are presented on P-type orbits in stellar binary stellar systems, that should be fairly common as in Kepler 16AB. Specific attention is paid to reduced orbital lfetimes of exoplanets in the habitable zone by the stellar binary, known from Dvorak (1986).

• 대한안전경영과학회지
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• 제5권3호
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• pp.31-43
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• 2003

In the Oriental Medicine, the physical constitution of a human being can be classified into five characteristic elements. The remedy based on the five elements constitution has revealed excellent clinical effects so far. Therefore, it may be worthwhile to conduct job design researches considering the five elements constitution for improving the efficiency and safety of job. In this study, we examine whether the theory can be applied for job design through the experiment by ‘Digital-type Speed Anticipation Reaction Tester’ or not and suggest the desirable direction of job design.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2003년도 춘계학술대회
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• pp.17-25
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• 2003

Human being can be divided into five elements in the Oriental Medicine. The remedy by using five elements constitution has been shown great effects clinically during that time. Therefore, The job design research considering Oriental Human Constitution is needed for job efficiency and safety. In This study, we examine whether the theory can be applied for job design through the experiment by 'Digital-type Speed Anticipation Reaction Tester' and suggest the desirable direction of job design.

• Journal of Dental Anesthesia and Pain Medicine
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• 제19권3호
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• pp.167-173
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• 2019

This case report describes a frail, middle-aged woman with multiple comorbidities who was scheduled to undergo extraction of all remaining teeth in anticipation of cardiac quadruple valve intervention. Dental and anesthetic management of the patient are discussed. Medical care of the patient with a high burden of comorbidities requires a multidisciplinary approach even for a routine dental procedure.

• 한국운동역학회지
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• 제21권4호
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• pp.391-395
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• 2011

To investigate the anticipatory effect on landing patterns during side-cutting maneuver, thirteen healthy female elite college soccer players participated in this study. Three-dimensional knee kinematics, effective mass and correlation between both these were measured and analyzed using a motion analysis and force plates. Each testing session included anticipated tasks, $45^{\circ}$ side-cutting tasks (AC), followed by a set of unexpected side-cutting (UC) in a random order. Knee flexion/extension, valgus/varus and internal/external rotation angles and effect mass were compared by using paired t-test. Also, correlation analysis was performed to identify the relationship between knee angles and effective mass. Effective mass during UC was greater than that during AC. Effective mass and maximum knee flexion angle were positively correlated during AC and not during UC. Based on the relationship between effective mass and knee flexion angle in AC, shock absorption can be controlled by knee joint flexion in pre-predicted movement condition. However, effective mass can not be controlled by knee flexion in UC condition. The unexpected load affects were more irregular on the knee joint, which may be one of the injury mechanisms of anterior cruciate ligament (ACL) in female soccer players.

• 한국안전학회지
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• 제29권6호
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• pp.144-150
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• 2014

A man is a component of a large system how complex it may be so that human performance which can influence on the system safety should be included in system safety assessment. Meanwhile, human performance can vary over time due to lots of factors. Among them, stress is an indirect factor that may cause human error which can result in industrial accidents. To assess stress level of human workers, not a few assessment tools have been developed. However, it can be questionable to utilize them for human performance anticipation because they were mainly developed with the viewpoint of mental health, though stress assessment can be also required in the safety aspect. Therefore, this study aimed to survey the possibility of their application with safety purpose. About 10 kinds of work stress tools were collected and analyzed with reference to assessment items, assessment and analysis methods, and follow-up measures. The results showed that most tools focused their weights on Demands, Supports, and Relationships, in sequence. However, they, except only one tool developed by the Japanese researchers, merely advised to set up counterplans in PDCA cycle or risk management activities. In consequence, application of stress assessment tools mainly developed for mental health seemed impractical for safety purpose with respect to human performance anticipation so that it was concluded that development of a new assessment tools aimed to human performance variation and accident prevention would be inevitable.

• 한국산학기술학회논문지
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• 제13권12호
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• pp.5808-5815
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• 2012

본 연구는 여행객이 관광정보시스템(TIS : Tourism Information System)을 통한 여행정보 습득시 여행정보의 중요도(기대 계획단계)와 성취도(경험단계)의 차이를 규명함으로써 여행객들은 어떤 여행정보를 탐색하고 소비하는지, 여행정보 행동의 차이를 규명하는데 본 연구의 1차적인 목적이 있다. 또한 이를 중심으로 축제 여행 정보 제공시 여행객의 만족과 잠재 고객 확보를 위한 정보 개발 및 활용할 수 있는 기초자료를 제공하고자 하는데 본 연구의 목적이 있다 하겠다. 이에 연구결과를 종합해 보면 다음과 같다. 첫째, 축제에 참여한 여행객들은 사전에 여행정보를 상대적으로 습득하지 하지 않고 참여하고 있는 것으로 파악되었다. 둘째, 축제여행정보는 축제참여시 중요도와 경험 후 성취도에는 차이가 있는 것으로 규명되었다.

• 한국지반공학회지:지반
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• 제14권5호
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• pp.235-247
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• 1998

다가오는 21세기 동북아의 HUB공항이 될 인천국제공항은 인천광역시의 영종도와 용유도 사이의 간석지 일대를 인근지역의 해사를 준설하여 매립함으로써 자리를 잡게 된다. 이 지역의 원지반은 연약한 점토질 실트 (ML) 또는 실트질 점토 (CL)이고, 준설매립지반은 SP-SM으로 분류되며, 입도가 불량(Cu>3)하여, 다짐이 용이하지 않을 것으로 조사결과(다짐지수=0.6~0.74)가 나타났다. 따라서, 본 지역과 같이 빈입도이고, 주 다짐대상층이 3m~5m로 분포하고 있어 준설매립토의 개량에 대하여 효과적이고 경제적인 공법을 제시하기 위하여는 시험시공이 필수적이다. 이에 국내외의 학술자료, 시공사례등의 자료를 통하여 적용가능한 4가지의 공법을 선정하여 시험시공을 실시하고, 정확한 개량효과를 확인키 위한 지반조사 및 계측을 실시하여 본 공사적용을 위한 최적 다짐공법(유압식 햄머 다짐공법)을 선정하였다.