• 인터넷정보학회논문지
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• 제15권2호
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• pp.95-107
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• 2014

본 연구는 프로젝트 급진성과 공급망의 혁신성 간의 조화가 공급망 통합 정도에 미치는 영향을 실증적으로 살펴보는 것이 목적이다. 본 연구의 가설을 검정하기 위해 서베이 방법론이 사용되었다. 연구 결과, 공급망 통합의 정도는 프로젝트 급진성과 공급망의 혁신성간의 조화에 따라 다양하게 나타남을 알 수 있다. 특히, 공급망을 이루는 2개의 조직이 모두 변화지향적인 조직이며 동시에 통합 프로젝트가 급진적일 때 공급망의 통합 정도가 가장 높은 것으로 나타났다. 또한, 통합 프로젝트가 급진적이면 비록 공급망을 이루는 조직이 하나는 변화지향적이고 다른 하나는 현상유지 지향적이더라도 여전히 공급망의 통합 정도가 높은 것으로 조사되었다. 하지만 통합 프로젝트가 급진적이지 않고 점진적인 개선을 추구한다면 공급망 조직의 유형이 위와 같은 경우라도 공급망의 통합 정도는 매우 낮게 나타났다. 마지막으로 만약 공급망을 구성하는 조직이 둘 다 현상유지 지향적이라면 통합 프로젝트가 급진적이든 점진적 개선을 추구하든 상관없이 공급망 통합의 정도는 낮은 것으로 파악되었다. 이러한 결과를 토대로 본 연구는 급진성의 정도관점에서 조직의 혁신성과 조화를 이룰 수 있는 프로젝트여야만 성공적인 공급망 통합 즉, 성공적인 조직의 변화를 가져 올 수 있다고 주장한다.

• 정보교육학회논문지
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• 제15권1호
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• pp.11-22
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• 2011

이 연구는 교육용 로봇을 활용한 STEM 통합교육이 학업성취, 교과 태도에 미치는 효과를 알아보기 위해 수행되었다. 연구대상은 초등학교 6학년 2개반 73명을 선정하였으며, 실험집단은 교육용 로봇을 활용한 STEM 통합교육을, 통제집단은 교과서 중심의 분과형 수업을 12차시 동안 처치하였다. 연구의 결과로 첫째, 인지적 영역인 수학 과학 학업성취에 있어서 교육용 로봇을 활용한 STEM 통합교육은 교과서 중심의 분과형 수업보다 더 효과적이었다. 특히, 학업성취 하위요인인 지식, 이해, 적용 영역으로 사후 검증한 결과 지식영역에서는 두 집단 간 통계적으로 유의한 차이가 없었으나, 이해와 적용 영역에서는 실험집단이 통계적으로 유의하게 향상됨을 확인할 수 있었다. 둘째, 정의적 영역인 교과 태도 수준에 있어서 실험집단이 통제집단에 비해 긍정적인 영향이 있음을 확인할 수 있었다. 교육용 로봇을 활용한 STEM 통합교육은 현행 수학 과학 교과의 정의적 영역인 흥미를 보완할 수 있는 하나의 방법이 될 수 있으리라 기대한다.

• 재활복지
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• 제18권4호
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• pp.47-74
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• 2014

본 연구는 척수장애인의 사회통합에 미치는 요인을 연구함으로써 사회복지실천 현장에서 척수장애인의 사회통합을 위한 대안 마련에 기초자료를 제공하고자 시도되었다. 본 연구의 목적을 달성하고자 한국척수장애인협회의 산하조직 13개 지역협회의 협조를 얻어 각 지역 협회에 배포한 390부 중 회수된 설문지 335부 중에서 답변이 불성실한 21부를 제외하고 304부를 사용하였다. 척수장애인의 사회통합에 영향을 미치는 요인에 관한 구조방정식 최종모형의 경로별 효과분석과 유의성 검증을 토대로 신체 심리적 요인, 경제적 요인, 사회적 지지가 척수장애인의 사회통합에 미치는 영향을 비교한 결과 삶의 만족도는 신체 심리적 요인, 사회적 지지와 사회통합을 부분매개 하는 것으로 나타났다. 또한 경제적 요인과 사회통합에는 완전매개 하는 것으로 나타났다. 이러한 결과는 척수장애인의 삶의 만족도를 높이면 척수장애인의 사회통합의 목적을 달성할 수 있을 것이라는 것을 시사하고 있다.

• 기술사
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• 제16권4호
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• pp.4-14
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• 1983

when one is designing a continuous bridge with variable cross sections, it is very troublesome to integrate explicitly load terms and various factor under consideration so that it has different moment of inertia at each cross section. In this paper to obtain the influence line of a arbitary-span continuous beam with variable cross sections, the value of some particular function due to a load at any point can be carried out by numerical integration instead of definite integral. The ordinate of the influence line equals the product of the magnitude of the final moment at each support due to unit moment at any support and the load terms due to unit load, measured at the point of application of the load. It is concluded that this method can be easily used to design continuous bridges with arbitary cross sections.

• 해양안보
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• 제1권1호
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• pp.31-59
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• 2020

본 연구의 목적은 왜 러시아가 카스피해 협약에서 카스피해 횡단 노선을 허용하는 방향으로 입장을 전환하였는지를 밝히는 데 있다. 러시아의 유라시아 통합에 대한 입장 변화를 설명하는 이론은 변화의 원인으로 서방으로부터의 고립과 아시아-태평양의 정치·경제적 중요성 상승을 제시하지만, 서방의 영향력을 허용할 수 있는 입장 변화의 원인은 설명하지 못한다. 따라서 본 연구에서는 러시아의 카스피해 입장 변화의 원인으로 유라시아 개발에 따른 유라시아 영향력 확대에 대한 인식의 변화를 제시한다.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2002년도 창립 20주년기념 국제학술대회
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• pp.77-84
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• 2002

The Global Positioning System, GPS technology has been widely used in positioning and attitude determination. It is well known that the accuracy, availability and reliability of the positioning results are heavily dependent on the number and geometric distribution of tracked GPS satellites. Because of this limitation, in some situations, such as in urban canyons, underground space or inside of buildings, it is really hard to navigate with GPS receiver. Therefore, in order to improve the performance of satellite-based positioning, the integration of GPS with the pseudolite technology has been proposed. With this pseudolite technology, it is expected that seamless positioning service can be provided in wider area without replacing existing GPS receivers. On the other hand, to adopt pseudolites at larger scale, it is necessary to verify how the pseudolites can complement the existing GPS-based positioning. In this paper the authors present the detail of experimental investigations and the results of the fundamental verification for seamless positioning using integration of GPS and pseudolite. This paper shows that the accuracy and efficiency of integrating GPS and pseudolite through the dynamic and static positioning experiment and discuss about the influence on GPS receiver by pseudolite signal. The experimental results indicate that the accuracy of the height component can indeed be significantly improved, to approximately the same level as the horizontal component.

• 한국유체기계학회 논문집
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• 제2권1호
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• pp.7-14
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• 1999

This simulation method is developed by using GateCycle code for the performance evaluation of the gas turbine in IGCC(Integrated Gasification Combined Cycle) power plant that uses clean coal gas fuel derived from coal gasification and gas clean-up processes and it is integrated with ASU(Air Separation Unit). In the present simulation method, thermodynamic calculation procedure is incorporated with compressor performance map and expander choking models for considering the off-design effects due to coal gas firing and ASU integration. With the clean coal gases produced through commercially available chemical processes, their compatibility as IGCC gas turbine fuel is investigated in the aspects the overall performance of the gas turbine system. The predictions by the present method show that the reduction of the air extraction from gas turbine to ASU results in a remarkable increase in the efficiency and net power of gas turbines, but it is accompanied with a shift of compressor operation point toward to surge limit. In addition, the present analysis results reveal the influence of compressor performance characteristics of gas turbine have to be carefully examined in designing the ASU integration process and evaluating the overall performance parameters of the gas turbine in IGCC Power plant.

• Korean Journal of Geomatics
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• 제2권1호
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• pp.17-24
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• 2002

The Global Positioning System technology has been widely used in positioning and attitude determination. It is well known that the accuracy, availability and reliability of the positioning results are heavily dependent on the number and geometric distribution of tracked GPS satellites. Because of this limitation, in some situations, such as in urban canyons, underground or inside of buildings, it is difficult to navigate with GPS receiver. Therefore, in order to improve the performance of satellite-based positioning, the integration of GPS with the pseudolite technology has been proposed. With this pseudolite technology, it is expected that seamless positioning service can be provided in a wider area without replacing existing GPS receivers. On the other hand, to adopt pseudolites on a larger scale, it is necessary to verify how the pseudolites may complement the existing GPS-based positioning. In this paper the authors present the details of the experiments and the results of the fundamental verification for seamless positioning using integration of GPS and pseudolite. This paper shows that the accuracy and efficiency of integrating GPS and pseudolite through the dynamic and static positioning experiment. The influence of pseudolite signal on GPS receiver is also discussed. The experimental results indicate that the accuracy of the height component can indeed be significantly improved, to approximately the same level as the horizontal component.

• Safety and Health at Work
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• 제10권4호
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• pp.461-469
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• 2019

Background: Collisions involving workers and mobile machines continue to be a major concern in underground coal mines. Over the last 30 years, these collisions have resulted in numerous injuries and fatalities. Recently, the Mine Safety and Health Administration (MSHA) proposed a rule that would require mines to equip mobile machines with proximity detection systems (PDSs) (systems designed for automated collision avoidance). Even though this regulation has not been enacted, some mines have installed PDSs on their scoops and hauling machines. However, early implementation of PDSs has introduced a variety of safety concerns. Past findings show that workers' trust can affect technology integration and influence unsafe use of automated technologies. Methods: Using a mixed-methods approach, the present study explores the effect that factors such as mine of employment, age, experience, and system type have on workers' trust in PDSs for mobile machines. The study also explores how workers are trained on PDSs and how this training influences trust. Results: The study resulted in three major findings. First, the mine of employment had a significant influence on workers' trust in mobile PDSs. Second, hands-on and classroom training was the most common types of training. Finally, over 70% of workers are trained on the system by the mine compared with 36% trained by the system manufacturer. Conclusion: The influence of workers' mine of employment on trust in PDSs may indicate that practitioners and researchers may need to give the organizational and physical characteristics of each mine careful consideration to ensure safe integration of automated systems.

• Smart Structures and Systems
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• 제21권5호
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• pp.571-582
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• 2018

Track irregularities of high-speed Maglev lines have significant influence on ride comfort. Their adjustment is of key importance in the daily maintenance of these lines. In this study, an adjustment method is proposed and track irregularities analysis is performed. This study considers two modules: an inspection module and a vehicle-guideway coupling vibration analysis module. In the inspection module, an inertial reference method is employed for field-measurements of the Shanghai high-speed Maglev demonstration line. Then, a partial filtering, integration method, resampling method, and designed elliptic filter are employed to analyze the detection data, which reveals the required track irregularities. In the analysis module, a vehicle-guideway interaction model and an electromagnetic interaction model were developed. The influence of the measured line irregularities is considered for the calculations of the electromagnetic force. Numerical integration method was employed for the calculations. Based on the actual field detection results and analysis using the numerical model, a threshold analysis method is developed. Several irregularities modalities with different girder end's deviations were considered in the simulations. The inspection results indicated that long-wavelength irregularities with larger girder end's deviations were the dominant irregularities. In addition, the threshold analysis of the girder end's deviation shows that irregularities that have a deviation amplitude larger than 6 mm and certain modalities (e.g., M- and N-shape) are unfavorable. These types of irregularities should be adjusted during the daily maintenance.