• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2005년도 추계학술대회 및 정기총회
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• pp.213-216
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• 2005

In this research, we explore how to manage the transition of technology generations considering incremental innovation of the existing technology generation. Firms can slow down decaying of the existing technology by continuous incremental improvements rather than introducing a new generation technology at the first time if the former strategy is better. We characterize optimal technology transition problem by setting up an optimal control model. The model which is originally designed and solved by Thompson(1968) as a ‘Machine maintenance problem’ has been cited to build the main body of our model. With this analytical model, we derive optimal ‘incremental innovation’ strategy which is considering transition to the next technology. Our analysis indicates that there exists an unique ‘stopping incremental innovation timing’. Before the point of time, the decision maker should make his effort at a maximum level to enhance the current technology. However from the stopping timing to the final time horizon where the new technology is introduced, it is found that not to invest to the current technology any more is optimal.

• Journal of Information Processing Systems
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• 제18권1호
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• pp.12-25
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• 2022

In recent years, deep convolutional neural networks have made significant progress in the research of single image super-resolution. However, it is difficult to be applied in practical computing terminals or embedded devices due to a large number of parameters and computational effort. To balance these problems, we propose CSRNet, a lightweight neural network based on channel split residual learning structure, to reconstruct highresolution images from low-resolution images. Lightweight refers to designing a neural network with fewer parameters and a simplified structure for lower memory consumption and faster inference speed. At the same time, it is ensured that the performance of recovering high-resolution images is not degraded. In CSRNet, we reduce the parameters and computation by channel split residual learning. Simultaneously, we propose a double-upsampling network structure to improve the performance of the lightweight super-resolution network and make it easy to train. Finally, we propose a new evaluation metric for the lightweight approaches named 100_FPS. Experiments show that our proposed CSRNet not only speeds up the inference of the neural network and reduces memory consumption, but also performs well on single image super-resolution.

• 기술사
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• 제34권1호
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• pp.49-52
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• 2001

It is expected that transportation sector will develope to a systematic and multi-disciplinary way in which transportation, information and electronic technologies are harmonized. This will be the way that the 21st century demand. To be prepared for such development, sharing of information from different sources through a integrated approach is essential. Also an active role of specialized staff are required to achieve a integrated control and management. The specialized staff should do his best for his task with appropriate specialty, a sense of responsibility, a progressive mind and a vision. He also make much effort to enhance and keep up-to-date his specialty. Then we can modestly look forward to a specialized Information society in the 21s1 century.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.767-772
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• 2005

The Internet is a packet switched network which offers best-effort service, but current IP network provide enhanced services such Quality of Services, Virtual Private Network (VPN) services, Distribute Firewall and IP Security Gateways. All such services need packet classification for determining the flow. The problem is performing scalable packet classification at wire speeds even as rule databases increase in size. Therefore, this research offer packet classification algorithm that increase classifier performance when working with enlarge rules database by rearrange rule structure into Bitmap Intersection Lookup (BIL) tables. It will use packet's header field for looking up BIL tables and take the result with intersection operation by logical AND. This approach will use simple algorithm and rule structure, it make classifier have high search speed and fast updates.

• 연구윤리
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• 제1권2호
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• pp.11-13
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• 2020

Purpose: The author wants to specify scope of research, identify without giving burden, prevent unfair identification of the author, admit of production of the outcome, enact rules of identification, and build up foundation of development. Also, this study defines scope of publication of outcome of research to prevent unfair identification of authors and admit of them. Research design, data and methodology: The study described literary research, standard research, phenomenon research, and empirical result without methodologies, statistical analysis and scientific test and investigated operation system of KODISA cases. Results: At publication of findings of the research, researchers shall identify the ones of production of the finding to allocate help of the research. Conclusions: Scientific journals shall be controlled to develop ability and to grow up and have a system. Researchers shall give direction of other scientific journals. The study made efforts to be a model. KODISA Edition Team shall make an effort to keep and develop. So far, no regulation of identification of authors has produced disturbance so terminologies should be uniformed. Researchers shall keep rules of identification of authors to uniform and regulate identification of authors, conditions of authors, and order and correspondent authors. KODISA enacted rules of identification of authors for the first time in Korea to develop science.

• Progress in Superconductivity
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• 제6권1호
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• pp.7-12
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• 2004

Due to the very fast switching speed of Josephson junctions, superconductive digital circuit has been a very good candidate fur future electronic devices. High-speed and Low-power microprocessor can be developed with Josephson junctions. As a part of an effort to develop superconductive microprocessor, we have designed an RSFQ 4-bit ALU (Arithmetic Logic Unit) in a pipelined structure. To make the circuit work faster, we used a forward clocking scheme. This required a careful design of timing between clock and data pulses in ALU. The RSFQ 1-bit block of ALU used in this work consisted of three DC current driven SFQ switches and a half-adder. We successfully tested the half adder cell at clock frequency up to 20 GHz. The switches were commutating output ports of the half adder to produce AND, OR, XOR, or ADD functions. For a high-speed test, we attached switches at the input ports to control the high-speed input data by low-frequency pattern generators. The output in this measurement was an eye-diagram. Using this setup, 1-bit block of ALU was successfully tested up to 40 GHz. An RSFQ 4-bit ALU was fabricated and tested. The circuit worked at 5 GHz. The circuit size of the 4-bit ALU was 3 mm ${\times}$ 1.5 mm, fitting in a 5 mm ${\times}$ 5 mm chip.

• 한국산학기술학회논문지
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• 제14권6호
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• pp.2677-2687
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• 2013

창업자의 기업가정신과 심리특성은 창업성공을 위한 매우 중요한 요인이다. 이와 같은 중요성을 인식하고, 본 연구는 창업자의 기업가정신과 심리특성이 창업성공에 미치는 영향관계를 고찰하였다. 이를 위하여 중소기업 진흥공단에서 설립 운영하는 청년창업사관학교에 입교한 청년창업자를 대상으로 조사한 설문지 122부를 실증 분석하였다. 분석 결과, 창업자의 진취성, 위험감수성, 자율성으로 구성된 기업가정신과 심리 특성인 내적 통제소재가 모두 창업성공에 긍정적인 영향을 미치는 것으로 나타났다. 이와 같은 연구결과에 따라, 다음과 같이 이론적 실무적 시사점을 제공하였다. 첫째, 창업성공 관점에서 기업가정신의 중요성을 인식하고, 창업을 구상하는 예비창업자들은 자신의 기업가정신을 가름해 보고 의사결정 하는 것이 바람직할 것이다. 둘째, 청년창업자들의 기업가정신을 고취시키기 위한 보다 효과적인 창업교육이 될 수 있도록 심혈을 기울여야 한다. 따라서 창업 보육기관들은 '기업가정신 훈련 프로그램'과 같은 교육과정을 개발해 나갈 필요가 있다. 셋째, 기업가정신이나 심리적 특성은 유 소아기 부터 형성되기 때문에 가정의 역할 또한 매우 중요함을 인식해야만 한다. 넷째, 창업자 스스로도 기업가정신을 강화시키기 위한 노력이 필요하다. 마지막으로, 창업자의 내적 통제소재를 강화시켜야 한다. 따라서 창업자 자신은 물론 창업 보육기관에서도 이에 대한 깊은 관심을 가져야만 한다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2005년도 춘계학술대회 논문집
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• pp.369-375
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• 2005

중국 경제의 급성장으로 인한 전세계 물동량의 동북아시아로의 집중현상은 부산항을 포함한 지역 내 항만들의 경쟁을 점차 심각해지게 하고 있다. 이에 동북아시아 항만들은 생산성과 더불어 항만의 서비스를 극대화하고자 하는 노력을 기울이고 있으며 항만이 제공하여야 할 서비스 중 가장 중요하게 부각되고 있는 항만물류정보 시스템 구축 및 효율적 운영에 총력을 기울이고 있는 실정이다. 그러나 부산항이 경우, 이미 항만물류 정보시스템은 구축이 되어 있으나 보안 및 인증문제 등으로 인해 아직 활성화 되지 못하였다. 이에 본 연구에서는 부산항 항만물류산업에서 EDI의 활용도를 높이기 위한 전체적인 연구모형 도출과 항만물류업체를 업종별, 집단별로 구분하여 차별화된 활성화 모형을 도출하는 것을 목적으로 하고 있다.

• KIEAE Journal
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• 제8권4호
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• pp.63-69
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• 2008

The thesis is a comparative analysis of Infill Technologies between Korea's long-life Mock-up House, a study driven by 'Durability and Flexibility of Long-life Housing Technology Development' of R&D, and Japan's KSI experimental house, the major example of Japan's long-llfe housing. In terms of the domestic Mock-up House, a system of building the floor first was applied. The floor material of each housing unit required a development of dry heating component that is partially substitutable in order to avoid conflict with the finishing. Also, a development of a floor system that can counteract against the construction inaccuracy was required. In the Case of an outer wall, need to make the wall with the chassis. In the case of ceiling, need to develop the double ceiling system which is good for sound insulation. Also, in comparison to KSI experimental house in Japan, it would require to develop a wiring system of the ceiling which can react to the movement of the wall. Especially, to assure the flexible nature of an internal wall, it would desperately require the research and development of the products related to components and flexible system of mechanical/electrical/communication parts as well as supporting institutionalized system for this development. Furthermore, for KSI experimental house in Japan, it would be necessary to formulate a construction manual as well as a systematic and practical planning guide to invent a new interface rule which will secure simplicity of assembling, dismantling, installation and replacement of architectural components for which research development is quite insignificant at the moment. This effort will have to continue to give a solid direction for better application of such reference manual during construction and development of long life span apartment by public sector as well as private corporations.

• 한국항해항만학회지
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• 제29권10호
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• pp.907-913
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• 2005

중국 경제의 급성장으로 전세계 물동량이 동북아시아로 집중되어 부산항을 포함한 동북아시아 주요 항만간 경쟁이 점차 심각해지고 있다. 이에 동북아시아 항만들은 생산성과 더불어 항만의 서비스를 극대화하고자 하는 노력을 기울이고 있다. 항만이 제공하여야 할 서비스 중 가장 중요하게 부각되고 있는 항만물류정보 시스템구축 및 효율적 운영에 총력을 기울이고 있는 실정이다. 그러나 부산항의 경우, 이미 항만물류 정보시스템은 구축이 되어 있으나 EDI문서의 중복성과 시스템 연계성 부족 등의 문제점으로 인해 아직 활성화 되지 못하였다. 이에 본 연구에서는 부산항 항만물류산업에서 EDI의 활용도를 높이기 위한 전체적인 연구모형 도출과 항만물류업체를 업종별, 집단별로 구분하여 차별화 된 활성화 모형을 도출하는 것을 목적으로 하고 있다.