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      • KCI등재

        협력 파트너의 지식파급이 기업의 혁신성과에 미치는 영향

        문성배 한국혁신학회 2019 한국혁신학회지 Vol.14 No.4

        Firms’ product innovations can be differentiated into new to the firm (imitative innovation) and new to the market (drastic innovation). Utilizing the 2016 Korea Innovation Survey for the manufacturing sector, this study empirically analyzes the effect of spillovers from different cooperative partners. The estimation results show that spillovers from cooperative partners have different effects on the sales of innovative products. Spillovers from private customers, universities, and research institutions increase the sales of products new to the market. On the other hand, incoming spillovers from competitors matter for the sales of products new to the firm but do not have any significant impact on product innovation new to the market. 기업의 기술혁신은 기존에 존재하지 않았던 새로운 제품을 출시하는 시장 최초인 혁신(급진적 혁신)과 시장에는 존재하지만 그 기업에게는 최초인 혁신(모방적 혁신)으로 구분할 수 있다. 본 연구는 2016년 한국기업혁신조사 제조업 부문 자료를 활용하여 기업의 협력 파트너별 지식파급이 시장 최초 혁신과 기업 최초 혁신에 미치는 영향을 실증 분석하였다. 추정 결과에 따르면 지식의 원천별로 혁신성과에 미치는 효과가 다른 것으로 나타났다. 민간 수요기업, 대학, 공공 연구기관의 지식파급은 시장 최초 혁신제품의 매출을 증가시키는 것으로 나타났다. 반면 동일 산업 내 협력파트너의 지식 유입은 기업 최초 혁신제품의 성과에는 긍정적이지만 시장 최초 혁신제품의 매출에는 유의한 영향을 주지 않는 것으로 나타났다.

      • 2차원적 음원추적에 관한 연구III - 디지털 신호처리를 중심으로 -

        문성배,전승환 한국항해항만학회 2000 한국항해학회지 Vol.24 No.5

        Before some experiments were carried out with analog bandpass filter which used for filtering the noise included in sound source signal. And this filter was constituted by condenser, register and operational amplifier. Hut these elements made the phase characteristics to differentiate in each sensing channel and cause a little of measurement error. We made new measurement system that was substituted digital filter for the analog filter in order to develop the optimal system which could find the time delay between each sensors with high accuracy. This paper describes the new system's constitution and the function of each parts. Specially three digital filters were designed and applied to the digital signal processing Part. And a series of experiments were carried out with the source's distance 9.53meters and the random bearing interval within the limits of $0^{\circ}$ ~ $180^{\circ}$. As a result, we have recognized that the accuracy of measurements were differentiated by the methods what kind of digital filter were adopted. And we have confirmed the facts that IIR LPF was suitable for sound source's bearing measurement and FIR LPF reduced the range measurement error.

      • KCI등재

        Implementation of Real-time Wheel Order Recognition System Based on the Predictive Parameters for Speaker's Intention

        문성배,전승환 한국항해항만학회 2011 한국항해항만학회지 Vol.35 No.7

        In this paper new enhanced post-process predicting the speaker's intention was suggested to implement the real-time control module for ship's autopilot using speech recognition algorithm. The parameter was developed to predict the likeliest wheel order based on the previous order and expected to increase the recognition rate more than pre-recognition process depending on the universal speech recognition algorithms. The values of parameter were assessed by five certified deck officers being good at conning vessel. And the entire wheel order recognition process were programmed to TMS320C5416 DSP so that the system could recognize the speaker's orders and control the autopilot in real-time. We conducted some experiments to verify the usefulness of suggested module. As a result, we have confirmed that the post-recognition process module could make good enough accuracy in recognition capabilities to realize the autopilot being operated by the speech recognition system.

      • KCI등재

        레이더를 이용한 선박제원의 추정

        문성배,정은석,전승환 해양환경안전학회 1997 海洋環境安全學會誌 Vol.3 No.1

        When navigating at sea, informations like other ship's particular are very important to navigator who should make a safe maneuvering. Most of all is obtained through the optical observation and/or the radiotelephone communication, but it is not easy to perceive them when the visibility is restricted or there is some hardness in communication. In this study, we suggest the algorithm that measures the ship's length and speed on the radar screen and estimates the ship's particular such as gross tonnage, breath and type on the base of above two factors.

      • KCI등재

        Computer Adjustment Costs:Is Quality Improvement Important?

        문성배 정보통신정책학회 2012 정보통신정책연구 Vol.19 No.3

        This paper examines how the costs of adopting new technology are different from those of expanding capital stock by utilizing the data on 20 U.S. manufacturing industries from 1983 to 1998. Using the Generalized Method of Moment (GMM), I estimate a dynamic factor demand model in which the adjustment costs of computer investment are allowed to depend on both technology adoption and quantity expansion. The results suggest that an additional one dollar investment in computers causes on average 35 cents of adjustment costs, of which 25 cents is due to quantity expansion and 9 cents is due to technology adoption. In particular, the technology adoption cost increases significantly in the late 1990s because of a rapid increase in the technological gap in computers. Decomposition of total factor productivity (TFP) growth, however, reveals that the presence of adjustment costs in computer investment causes a modest bias in TFP growth.

      • 2차원적 음원추적에 관한 연구 II

        문성배,전승환 한국항해항만학회 1998 한국항해학회지 Vol.22 No.4

        The whistle is a very important information source for the safety navigation under foggy weather. But navigator has no concern about this, because it must be achived by human hearing sense and considered as a vague signal. If the range and relative bearing of signal source can be detected automatically, it would be very useful system for preventing marine casualties making a lot of economic loss and environment pollution. Before the algorithm of 2-dimensional sound source tracking system was reported. This paper describes the method that can obtain the time lag between three signals and the theory of cross-correlation analysis and subtraction method for cauculating the time lag by using the digital signal data sequences. And a series of experiments were carried out for various position of sound source in the range from 200cm to 530cm. As a result, we have recognized that sound source tracking system is possible to the sea field with improvement of position error.

      • Electrochemical performance and structure of chemically derived graphene for anode application

        문성배,김동하,이상호,남성식,박세국,진창수,신경희,연순화 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0

        The development of battery market has been widely studied due to the increasing demand of batteries for using various device for a along time such as smart phone, radio, MP3, automobile, and so on. The graphite oxide is known as flexible rechargeable battery electrode. The morphology and electrochemical performance of Graphite oxide as anode material for lithium-ion batteries is studied as various method. In this study, we designed and investigated lithium/graphite oxide battery cell for maximize the mAh discharge capacity of lithium Iron cathode and graphite oxide anode. Graphite Oxide structure is showed layer structure by Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD).

      • KCI등재

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