• 대한산업공학회지
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• 제41권3호
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• pp.233-242
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• 2015

This paper analyzes a multi-product inbound lot-sizing and outbound dispatching problem with multi-vehicle types in a third-party logistics distribution center. The product must be delivered to the customers within the delivery time window and backlogging is not allowed. Replenishing orders are shipped by several types of vehicles with two types of the freight costs, i.e., uniform and decreasing, are considered. The objective of this study is to determine the lot-size and dispatching schedules to minimize the total cost with the sum of inbound and outbound transportation and inventory costs over the entire time horizon. In this study, we mathematically derive a mixed-integer programming model and propose a genetic algorithm (GA1) based on a local search heuristic algorithm to solve large-scale problems. In addition, we suggest a new genetic algorithm (GA2) with an adjusting algorithm to improve the performance of GA1. The basic mechanism of the GA2 is to provide an unidirectional partial move of products to available containers in the previous period. Finally, we analyze the results of GA1 and GA2 by evaluate the relative performance using the gap between the objective values of CPLEX and the each algorithm.

• 품질경영학회지
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• 제52권1호
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• pp.149-172
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• 2024

Purpose: By empirically analyzing factors that affect the intention to introduce RPA, we aim to increase understanding of RPA introduction in small and medium-sized businesses and contribute to establishing an effective introduction strategy. The aim is to improve the company's productivity, reduce costs, and strengthen its competitiveness. It also provides policy recommendations for the introduction of RPA. Methods: A survey was conducted to examine whether the technical, organizational, and environmental factors of the TOE framework had an impact on the intention to adopt RPA. We also used stepwise regression analysis to determine whether firm size moderates this relationship. Results: Technical factors, organizational factors, and environmental factors were all found to have a significant impact on small and medium-sized enterprises' intention to adopt RPA. It was confirmed that company size has a moderating effect affecting the intention to adopt RPA. In particular, customer pressure, relative advantage, competitive pressure, age, government support, and the perceived ease of use of RPA was a key determinant of its adoption by small and medium-sized enterprises. Conclusion: This suggests that small and medium-sized businesses should comprehensively consider technical, organizational, and environmental factors when introducing RPA. It is expected to increase understanding of RPA introduction in small and medium-sized businesses, contribute to establishing effective introduction strategies, and contribute to improving company productivity, reducing costs, and strengthening competitiveness.

• 벤처창업연구
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• 제19권1호
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• pp.119-133
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• 2024

정부가 공공기술 사업화와 벤처창업 생태계 활성화를 위해 대규모 투자를 한 결과, 지난 2006년부터 1,600호 이상의 연구소기업이 등록, 21년 기준 1.1조원 규모의 매출이 발생하는 등의 양적 성과가 있었다. 그러나 이 성과는 연구소기업 1개당 평균 매출액 등이 지속하락하는 등 질적측면에서 문제가 발생하였으며 이 원인 진단으로 경영자의 기술지향성과 시장지향성 여부에 주목하게 되었다. 본 연구는 연구소 기업의 기술지향성과 시장지향성이 경영성과에 미치는 영향과의 관계에서 마케팅 비용과 연구개발 비용의 조절 효과가 어떠한 영향을 미치는지 분석하여 기업생존율 향상을 도모함으로써 연구소기업의 질적성장 개선에 시사점을 제시하는 것을 목적으로 하였다. 본 연구는 선행연구와 실증분석을 통해 크게 3가지 연구결과를 도출하였다. 첫째, 기술지향성의 기술우수성, 기술혁신성은 경영성과에 유의한 영향을 미쳤으나 기술집약도는 유의한 영향을 미치지 않은 것으로 확인되었다. 둘째, 시장지향성의 고객지향성, 경쟁지향성은 경영성과에 유의한 영향을 미쳤으나, 진입장벽 단일 항목으로는 경영성과에 유의한 영향을 미치지 않았다. 셋째, 일반현황을 통해 확보한 마케팅 비용과 연구개발 비용을 조절변수로 투입한 결과 다른 변수에는 영향을 미치지 않았으나 유일하게 진입장벽과 상호작용하여 재무적 경영성과에 영향을 미쳤으며, 연구개발비용은 음(-)의 완충효과를, 마케팅비용은 양(+)의 강화효과를 미치는 것으로 확인되었다. 이를 통해, 본 연구는 기술지향성과 시장지향성 모두 연구소기업 경영성과에 직접적 영향을 미치며, 연구소기업 성장에 영향을 미치는 중요 요인임을 확인하였다. 또한, 기업의 마케팅 및 연구개발 투자가 연구소기업의 초기 진입장벽 해소와 재무적 성과 향상에 유의한 영향을 미치는 요인임을 확인하였다. 이에 연구소기업 특성을 고려한 기술지향성과 시장지향성 강화에 대한 필요성을 시사하였으며, 다섯가지 이론적 기여점을 제시하였다. 첫째, 연구소기업의 기술사업화 및 기술혁신을 위한 제도적 지원체계를 강화할 필요가 있다. 둘째, 연구소기업 선정을 위한 검토위원회에서 기술성 외에 시장성 등을 질적 평가할 수 있도록 지표 등 개선이 필요하다. 셋째, 연구소기업 발굴 시점에서부터 투자 관점에서 기술성과 시장성을 고루 분석하고 판단하여 발굴할 필요가 있다. 넷째, 연구소기업의 원활한 초기시장 진입을 위해 마케팅 교육이나 컨설팅 등의 지원 강화가 필요하다. 다섯째, 각 연구소기업의 산업적 특성을 효율적인 연구개발 및 마케팅비용 투자를 할 수 있도록 지출전략과 마일스톤 수립 등을 지원할 필요가 있다.

• 전기학회논문지P
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• 제61권3호
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• pp.140-148
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• 2012

Aeronautical lights, which are internationally standardized sequence of colors and placements, are aeronautic safety devices that provide visual information to pilots by continuously adjusting their light intensity to appropriate level. In this paper, we consider the development testing for in pavement LED aeronautical light system such as taxiway centerline, stop line and temporary stop line. The test results of LED sourced lights have shown a drastic improvement in power consumption levels and cost efficiency compared to their halogen sourced counterparts The LED light used only 42.7% as much power as their halogen sourced counterparts. Taking installation costs into account, LED will cost only 58% of its halogen counterparts. These results suggest that developing the LED sourced aeronautical light would result in globally competitive products thar guarantees satisfaction to their consumers, and that both cost effective and energy efficient.

• 소성∙가공
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• 제22권5호
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• pp.243-249
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• 2013

The multi-point forming (MPF) process for three-dimensional curved sheet metal has been developed as an alternative to the conventional die forming process since MPF allows the manufacturing of various shapes using one die set and reduce the cost of production. However, the MPF process cannot provide high quality products yet due to defects occurring in the sheet such as dimples and wrinkles. It can also lead to economic loss because of long tool setup time and additional machining required outside of the sheet formed area. In this study, a new sheet metal forming method, called flexible roll forming (FRF), is proposed to solve the problems of existing processes for three-dimensional curved sheet metal. This progressive process utilizes adjusting rods, as well as upper and lower flexible rollers as forming tools. In contrast with the existing processes, FRF can reduce the additional production costs because of the possible blank size for the part longitudinal direction, which is unrestricted. In this research, methods and procedures of the flexible roll forming technology are described. Numerical forming simulations of representative three-dimensional curved sheet products are also carried out to demonstrate the feasibility of this technology.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 춘계학술대회논문집
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• pp.611-614
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• 2005

The introduction of the sound based on the soundscape concept has the effect to offer comfortable sound environments at the public spaces by masking undesired ones and to identify the spaces. Sound installation, sound sculptor and the soundscape are used for these purpose, but the most important factors to be considered therein are to determine what kind of sounds to offer and how to adjust them to the changing circumstances. But, installing, maintaining and adjusting the soundscape system directly in the field will ensue numerous problems as well as high costs. And, even if it was epochal and novel when the soundscape is first installed at a space, new different sound environment is necessary to continue the effectiveness as time goes. Thus, this study aims at devising the instrument system that has the artificial intelligence, enables to remote control, with a great ease, numerous variables, reproduce most agreeable sound sources, and can produce the proper sound fit to the space automatically and spontaneously.

• Journal of Electrical Engineering and Technology
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• 제11권2호
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• pp.361-366
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• 2016

Although the permanent magnet linear synchronous motor is a motor useful for transportation systems thanks to its high speed, high acceleration and deceleration, the linear motor generally has armatures installed on the full length of the transport path. It results in the increase in material costs and manufacturing time. As a means to solve this problem a stationary discontinuous armature system is suggested. However, it involves the following two issues. The first issue is it is impossible to control the mover in the section where any armature is not installed as armatures are distributed. The second one is increasing cogging force due to the ends of the armatures. Therefore, this study aims to solve these problems by adjusting intervals between armatures to control the mover anywhere, and to design the interval between armatures optimally to minimize the end cogging force. The suitable distance was deduced. It addressed the problems and showed suitability for long distance transportation PMLSM.

• 대한기계학회논문집B
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• 제27권11호
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• pp.1587-1594
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• 2003

Increased energy costs have placed demands for improved combustion efficiency, high equipment availability, low maintenance and safe operation. Furthermore low NO$_x\$ modification, installed due to strict environmental legislation, requires very careful combustion management. The flame monitoring system has been developed specially to satisfy these requirements. We aimed at gaining the relationship between the burner flame image and emissions such as NO$_x$ and unburned carbon in furnace by utilizing the image processing method. For the first step of development, its possibility test was undertaken with bench furnace. The test proceeded to the second step with pilot furnace and the system was observed to be effective for evaluating the combustion conditions. By using this technology, it is possible to perform continuous monitoring of the combustion conditions and instant detection of individual changes for each burner to prevent future loss of ignition. This may contribute to the saving of burner adjusting times for the changes of loads and fuels and to the reduction of the slagging as well.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.51-54
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• 2008

In this paper, we propose a practical method for displaying 2D/True3D mixed contents in real-time. Many companies released their 3D display recently, but the costs of producing True3D contents are still very expensive. Since there are already a lot of 2D contents in the world and it is more effective to mix True3D objects into the 2D contents than making True3D contents directly, people became interested in mixing 2D/True3D contents. Moreover, real-time 2D/True3D mixing is helpful for 3D displays because the scenario of the contents can be easily changed on playback-time by adjusting the 3D effects and the motion of the True3D object interactively. In our system, True3D objects are rendered into multiple view-point images, which are composed with 2D contents by using depth information, and then they are multiplexed with pre-generated view masks. All the processes are performed on a graphics processor. We were still able to play a 2D/True3D mixed contents with Full HD resolution in real-time using a normal graphics processor.

• 한국전자거래학회지
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• 제25권4호
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• pp.169-183
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• 2020

치열해지는 글로벌 시장에서 국내 기업들도 경쟁력 강화를 위해서는 기업의 경영전략과 연계된 선제적 해외 특허출원 및 확보 전략의 수립은 매우 중요하다. 이에 본 연구는 해외출원 경험이 있는 바이오생명, 제조업, 정보통신업, 정보서비스업의 중견, 중소, 창업 기업의 기술 혁신형 기업을 대상으로 심층인터뷰를 수행하였다. 기업의 내·외부 환경에 따른 출원루트 선정, 출원국선정, 비용절감방안, 대리인활용, 심사청구 시기 조정에 대한 해외특허출원전략을 분석함으로써 해외시장진출을 고려하는 기업의 해외출원 전략수립의 방향성을 제시하였다.