• Progress in Superconductivity
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• 제5권1호
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• pp.17-20
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• 2003

We have designed and measured a SFQ(Single Flux Quantum) DFFC and an Inverter(NOT) for superconducting ALU(Arithmetic Logic Unit) development. To optimize the circuit, we used Julia, XIC, and L meter for circuit simulations and circuit layouts. The Inverter was consisted of a D Flip-Flop, a data input, a clock input and a data output. If a data pulse arrives at the inverter, then the output reads ‘0’ (no output pulse is produced) at the next clock period. If there is no input data pulse, it reads out ‘1’(output pulse is produced). The DFFC was consisted of a D flip-Flop, an Inverter, a Data in, a Clock in and two outputs. If a data pulse arrives at the DFFC circuit, then the output2 reads ‘1’ at the next clock period, otherwise it reads out ‘1’ to output1. Operation of the fabricated chip was performed at the liquid helium temperature and at the frequencies of 1KHz.

• Journal of Information Technology Applications and Management
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• 제23권2호
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• pp.263-277
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• 2016

Recently, 3D printing technology has been considered as a core applicable technology because it brings many improvements such as the development of medical technology, medical customization, and reducing production cost and shortening treatment period. This research suggests a market prediction framework for medical 3D printing business. As an immature market situation, it is important to control some uncertainty for market prediction such as a customers' conversion rate. So we adopt decision making tree (DMT) model which used to choose an optimal decision making among diverse pathway. Among medical industries this paper just focuses on dentistry business. For predicting a 5 year period trend expected market size, we identified some replaceable denture procedure by 3D printing, collected related data, controlled uncertain variables. The result shows that medical 3D printing business could be a market of 28.2 billion won at 1st year and in the end of fifth year it could become on a scale of 61.1 billion won market.

• 한국식생활문화학회지
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• 제10권4호
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• pp.311-319
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• 1995

The history of vegetable preservation technology by salting and fermentation in Korea was reviewed from the Three Nations Era to the end of Chosun Kingdom, and the development of present day's Kimchi processing technology was traced back by using the classic books as well as recent review papers published in Korea. Although the written record on salting and fermentation of vegetables first appears in a 12th century literature (Dongkukisangkukjib, Gyu-Bo Lee $1168{\sim}1241$), the use of salted/fermented vegetables could be dated back to the Three Nations Era $(B.C.\;37{\sim}A.D.\;668)$ and even earlier period. The present type of Kimchi was gradually evolved after the introduction of red pepper into Korea in the 17th century. The descriptions on Kimchi fermention appeared in the literatures written in the period of $16th{\sim}19th$ centuries in Korea, Suunjapbang $(1500{\sim})$, Domundaijak (1611), Sasichanyocho (1656), Eumsikdimibang (1670), Chubangmun $(1600{\sim})$, Saekgyung (1676), Yorok $(1600{\sim})$, Sanlimkyungje (1715), Cheungbosanlimkyungje (1766), Kyuhapchongsoe $(1800{\sim})$, Imwonsipyukji (1827), Dongkuksesiki (1849) and Buinpylji $(1855{\sim})$ were reviewed.

• 대한토목학회논문집
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• 제38권6호
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• pp.967-977
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• 2018

건설현장에 숙련공 부족문제와 생산성 저하 문제가 지속적으로 제기되고 있으며, 이것에 대한 해결책의 하나로 건설자동화 기술도입이 검토되어 왔다. 이러한 배경에서 다양한 형태의 장비 및 시스템 개발이 이루어져 왔고, 특히 다수 및 다종의 건설장비가 투입되는 토공작업을 위한 개발이 많이 수행되었다. 하지만 개발된 장비나 시스템이 상용화 수준에 도달한 것은 매우 제한적이다. 그나마 단품 형태로 개발된 토공장비의 경우에는 현장에서 적용되고 있는 사례를 볼 수 있으나, 시스템 형태로 개발된 것은 각종 기능이 유기적으로 통합된 것이 아니라서 현장 테스트 단계에 머무르고 있다. 이러한 제약사항을 극복하고 제한된 예산과 연구기간을 고려할 때 어떤 기술분야의 어떤 요소기술들을 우선적으로 개발을 해야 하는지 전략이 필요하다. 본 연구에서는 상용화 수준의 토공시스템 개발을 위하여 필수적인 요소기술 분야와 세부 요소기술들을 설정하고 개발 우선순위를 결정하였다. 아울러 현재까지 개발이 완료된 토공시스템을 분석하고 이것에 근거하여 세부적인 개발방향을 제시하였다. 연구결과는 제한된 예산과 기간동안에 우선적으로 개발해야 할 기술을 설정하는데 사용될 수 있을 것이다.

• 통상정보연구
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• 제16권4호
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• pp.55-75
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• 2014

본 연구는 국내 ICT 제조업과 서비스업의 경쟁력 강화를 위한 기초 연구로서 효율성과 생산성 추이 및 생산성의 결정요인을 분석하는 것을 목적으로 하였다. 구체적으로 본 연구는 ICT산업의 효율성 분석을 위해 ICT 제조업 23개 업종과 ICT 서비스업 18개 업종에 대하여 2007년부터 2011년까지 5년간 규모의 수익불변을 가정한 DEA(Data Envelopment Analysis)의 CCR모형과 규모의 수익가변을 가정한 BCC모형을 통해 기술효율성과 순수기술효율성의 정태적 효율성을 살펴보고, 기술효율성에 대한 DEA/Window 분석과 Malmquist 생산성 지수를 이용하여 동태적 효율성을 분석하였다.

• 자원환경지질
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• 제41권5호
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• pp.541-549
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• 2008

우리나라에서 자원기술의 선도적 역할 및 자원산업 육성에 대한 수요가 증가함에도 불구하고 현행 방식의 연구개발 투자 및 관리로는 빠른 시일 내로 선진국 수준에 근접하기 어렵다. 따라서 자원기술시스템 강화를 위하여 마스터플랜 또는 전략의 수립, 전문인력 및 인프라의 부족 해소, 민간기술개발의 투자 확충이 필요하다. 본 연구에서는 우리나라 자원기술의 획기적 증진을 위하여 자원기술 및 자원개발산업의 개념 재설정, 연구개발 투자 확충 시스템의 구축, 전문인력의 확충, 인프라의 재구축이 필요함을 제안하고자 한다.

• 농업과학연구
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• 제39권4호
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• pp.459-466
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• 2012

The objective of this study is to observe growth pattern of grand rapids(lettuce) according to different dexperimental conditions for minimizing its growth period such as composition of nutrient, irradiation time of light source and cultivation mode. The culture of water spray type using seeds of grand rapids was performed during growth period of total 50 days. Experimental conditions consist of five compositions of nutrient (PW 0.5 mS/cm, PW 1.0 mS/cm, PY 0.5 mS/cm, PY 1.0 mS/cm, PW 2.0 mS/cm) and three irradiation times of light source (12h(on) / 12h(off), 18h(on) / 06h(off), 24h(on) / 00h(off)). Illumination was adjusted to ratio of 7:1:1 of red, blue and white color, respectively. Indoor environmental condition for cultivating grand rapids is as follows: temperature (19-$22^{\circ}C$), relative humidity (60-70%) and carbon dioxide (1,000-1,200 ppm). The data were obtained from five iteration tests. The maximum growth level was observed in the experimental condition of 18 hr(on) / 06 hr(off) and PY 1 mS/cm for 1st week of cultivation period, 24 hr(on) / 00 hr(off) and PY 1mS/cm for 2nd week of cultivation period, and 24 hr(on) / 00hr(off) and PW 1 mS/cm for 3rd week of cultivation period, respectively. On the contrary, the minimum growth level was observed in the experimental condition of 18 hr(on) / 06 hr(off) and PW 0.5 mS/cm for 1st week of cultivation period, 12 hr(on) / 12 hr(off) and PW 0.5 mS/cm for 2nd week of cultivation period, and 12 hr(on) / 12 hr(off) and PY 0.5 mS/cm for 3rd week of cultivation period, respectively. Based on the results obtained from this study, it is concluded that the growth level of grand rapids varied with different irradiation time of light source and composition ratio of nutrient according to cultivation period.

• 한국군사과학기술학회지
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• 제10권1호
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• pp.86-93
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• 2007

The objective of this paper is to examine the structure of technology spillover from UAV(unmanned air vehicle) technology to other industries by applying patents analysis. The network analysis on patent data of USPTO(United Stated Patents and Trademark Office) from 1981 to 2000 was adopted to investigate the characteristic change of the technology spillover The results show that the influence of the UAV technology to other industries has grown over the twenty years period. For the weapon system development, this study provides a research basis to estimate the technology spillover effects on industries. Searching a structural niche from the inter-industrial knowledge flow structure might be a useful technique to find core technologies which generate large technology spillover on the other industries.

• 품질경영학회지
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• 제42권3호
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• pp.477-496
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• 2014

Purpose: This paper has examined the impact of open innovation business model in technology commercialization with the data from 30 companies of manufacturing firms in South Korea. Methods: The findings provide support for distinguishing five hypotheses relating to development time, IP management, sales, firm size and R&D intensity. To test the hypotheses, data were collected using via e-mail and fax. Small and medium-sized (less than 300 employees) and large industrial firms were chosen for this study. Results: The result shows that openness in its business model is positively associated with successful technology commercialization. Conclusion: The major findings and the implications are: First, as the business model gets more open, development period of technology will be more favorable which gets benefit from rising costs of innovation. Second, as the business model gets more open, large portion of sales are created from new products. Thus, the problem of shorter product life in the market which affects large portion of market revenue can be solved through an open business model. Third, in general, R&D intensity, firm size and the level of IP management affect determination of business model types. The findings also suggest that companies need to increasingly address their external technology exploitation process instead of focusing on their internal innovation processes.

• 산업경영시스템학회지
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• 제34권1호
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• pp.74-79
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• 2011

Engineering valuation is a specialized discipline requiring expert knowledge and judgment, which scientifically estimates the economic value of industrial properties. By industrial properties, we mean engineering structures such as mines, factories, buildings, machines, and other industrial facilities as well as facilities of public enterprises. Particular industrial properties can have longer economic life if their performance is excellent and they are still suitable for current manufacturing needs. If not, its economic life will be shorter. As speed of technological progress becomes rapid, life-cycle and development period of a product is becoming shorter. In an industry characterized by rapid development of technology, industrial properties can become obsolescent faster. Even if they are in good working order, they could be no longer suitable for manufacturing new products based on radically different technology. In our research, we apply engineering approach to estimating functional economic life by factoring in technological obsolescence in such an industry.