• Nuclear Engineering and Technology
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• v.56 no.2
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• pp.463-471
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• 2024

Average and local convective heat transfer coefficients of nitrogen are measured experimentally in an electrically heated circular tube for a range of Reynolds number from 1.08 × 10⁴ to 3.60 × 10⁴, and wall-to-bulk temperature ratio from 1.01 to 1.77. The exit Mach number is up to 0.17, and the heat flux is up to 46 kW·m^-2. The molybdenum test section has a 62 diameters heated section with an inside diameter of 5 mm and a 30 diameters entrance section to ensure the fully-developed flow. Uncertainty of Nusselt number is less than 1.6 % in this study. The results indicate that the average heat transfer correlations evaluated by both the bulk and the modified film Reynolds numbers agree well with the experimental data. The local heat transfer results based on bulk properties are compared with previous empirical correlations. New prediction correlations are recommended which are significantly affected by the property variation and heated length. The comparison between the proposed correlations and experimental points shows that 88 % of experimental data fall into an error of 10 %, and almost all data are within an error of 20 %.

• Journal of the Institute of Electronics and Information Engineers
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• v.54 no.7
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• pp.49-54
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• 2017

In this paper, we propose magnetic field wireless power transfer antenna using Ferrite. It is possible to transfer magnetic field wireless power without independent ground by using characteristic of ferrite in the point that conventional magnetic field wireless power transfer was possible with independent grounding. Ferrite has a shielding effect of magnetic field and reduces leakage power, thereby improving transfer efficiency. We propose an antenna for magnetic field wireless power transfer using ferrite and confirmed that it is transmitted by 5W magnetic field wireless power through experiments. The wireless power transfer proposed in this paper can be applied variously to the Internet of things by using the magnetic field wireless power transfer through the metal.

• Journal of Korea Technology Innovation Society
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• v.2 no.3
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• pp.76-93
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• 1999

One of the conclusions from the research of the last 40 years on the relationship between tech-nological development and economic growth is that "technology is an essential factor in economic growth" A majority of firms in developing countries including Korea are small and medium size so technology transfer is an alternative to developing their own technologies. Firms in developing countries prefer technology transfers over self-development of technology because the former is less costly in time and money. The aim of this paper is to analyse the type and process of the tech-nology transfer and too suggest a direction and tasks in establishing technomart through the domes-tic and foreign case studies. Laws organizations and institutional aspects which are related to es-tablishing technomary were analyzed also in this paper.his paper.

• Journal of Korea Technology Innovation Society
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• v.6 no.3
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• pp.391-410
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• 2003

Along with the international technology transfer market, as the domestic market grows, more professional technology analysts are needed and it became more necessary to investigate the qualification of those experts to cope with growing market. In this study, the current working condition of those experts is described, qualification system is analyzed and more realistic suggestions on the system to activate the market and to encourage the experts will be introduced. The study was performed based on the questionnaire sent to the person who works in related fields, such as industry, technology transfer center, universities, etc.

• Journal of Information Management
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• v.32 no.3_4
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• pp.123-145
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• 2001

The purpose of this study is to develop technology valuation system for technology transfer, which is using and supporting knowledge information. The valuation system comprises estimation of latent business profit by supporting formatted patent and technology-products market information, analysis of contribution profit by using industrial standard and innovation step and value of technology by using a real option equation. This study suggests a successful system in order to valuate the technologies quantitatively, and to use and support knowledge information from KISTI databases or other selected internet Information.

• Bulletin of the Korean Chemical Society
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• v.30 no.6
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• pp.1317-1324
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• 2009

Asymmetric transfer hydrogenation of α-functionalized arylketones has been studied. The chiral Rh-catalyst effectively performed in transfer hydrogenation of $\alpha$-mesyloxyketones with an azeotropic mixture of formic acid/triethylamine to produce optically active 1-arylethandiols with excellent enantioselectivity.

• Journal of Advanced Navigation Technology
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• v.16 no.5
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• pp.810-816
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• 2012

In this paper, BER(Bit Error Ratio) performances of the TransferJet system, which is the standard of a close proximity inductive wireless communication system, are presented and analyzed. Comparing to other wireless communication systems, the TransferJet system has some advantages such as short communication range(i.e., high security in the wireless communication environments), fewer effects of multipath distortion, and higher transmission rate. In order to demodulate the received signal, either SC(Soft-decision Combining) or HC(Hard-decision Combining) can apply to the despreader and demodulator of the receiver. When the spreading factor is more than 4, the SC scheme approximately has a minimum signal-to-noise ratio gain of 2 dB over the HC scheme. Moreover, from simulation results, we can conclude that the quantization bits of 3 bits are an optimum value for the SC scheme in the TransferJet system since the 3-bit quantization achieves nearly the performance as that attained by double-precision floating-point.

• Journal of the Korean Society for Railway
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• v.10 no.6
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• pp.640-644
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• 2007

This paper suggests that the introduction of Seoul-Pusan High Speed rail system makes related railway industry to be developed through transfer of high technology and other related industries to be jointly grown by technology' ripple effects. Technology transfer and localization implementation process in the period of technology introduction was reviewed synthetically and problems at that period was also analyzed. And technology development countermeasures of railway industry was discussed in order to maintain and expand railway system technology in the future.

• Journal of Digital Convergence
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• v.14 no.3
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• pp.83-94
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• 2016

The objective of this paper is to examine the determinants of technology transfer for Small and Medium Enterprises. Based on IP-MARKET, KIPRIS, and Wintelips, we employ the logistic regression analysis using all data related with technology transfer in markets for intellectual property rights from 2008 through 2012. Our main results are as followings: (i)the more inventors the higher possibility; and (ii)the more claims and forwards the higher possibility of success in technology transfer in Small and Medium Enterprises.

• The Journal of Society for e-Business Studies
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• v.9 no.4
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• pp.103-116
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• 2004

It is needed to transfer the technology actively which has already developed to improve a up-to-date technology and foster the technological innovation. The technology transfer also can bring about a commercial success. To promote the technology transfer, it is needed to develop a new technology valuation model for a specific technology from a objective point of view, as well as to equip an institution such as the technology transfer center. The technology valuation from a objective point of view is of importance as the basic information for the price negotiation between a technology-buyer and a technology-seller. This paper takes aim at investigating a new technology valuation model and developing a technology valuation system for promoting the technology transfer. A new technology valuation system is developed as a web-enabling base. Using this users are able to estimate the value of specific technology on a real time efficiently.