• Proceedings of the Society of Korea Industrial and System Engineering Conference
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• 2002.05a
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• pp.171-176
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• 2002

The Internet, as a commercial tool, provided a new market that connects producers to consumers through I-commerce. 2-commerce through the Internet became a new trend in all industries. This research indicates problems that block the activation of I-commerce of agricultural products, which is less developed than the other industries. To solve the problems it suggests E-commerce for agricultural products combining on and off line markets. It also suggests data mining technique for analyzing entire information in system.

• Electronics and Telecommunications Trends
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• v.35 no.3
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• pp.55-65
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• 2020

With the development of nonvolatile memory technology, Intel has released the Optane datacenter persistent memory module (DCPMM) that can be deployed in the dual in-line memory module. The results of research and experiments on Optane DCPMMs are significantly different from the anticipated results in previous studies through emulation. The DCPMM can be used in two different modes, namely, memory mode (similar to volatile DRAM: Dynamic Random Access Memory) and app direct mode (similar to file storage). It has buffers in 256-byte granularity; this is four times the CPU (Central Processing Unit) cache line (i.e., 64 bytes). However, these properties are not easy to use correctly, and the incorrect use of these properties may result in performance degradation. Optane has the same characteristics of DRAM and storage devices. To take advantage of the performance characteristics of this device, operating systems and applications require new approaches. However, this change in computing environments will require a significant number of researches in the future.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.8
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• pp.1236-1241
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• 2017

We deposited Al-doped ZnO (ZnO:Al) thin films on glass substrates ($200mm{\times}200mm$) by using in-line magnetron sputtering system. Effects of various deposition parameters such as working pressure, deposition power and substrate temperature on optoelectronic characteristics including surface-texture etching profiles were carefully investigated in this study. We found that relatively low working pressure and high deposition power offered to obtain enhanced conductivity and optical transmittance. Haze properties showed similar trend with the transmittance. Furthermore, surface-texture etching study exhibited good morphologies when the films were deposited at $200-300^{\circ}C$. On the basis of these optimizations, we could find the deposition region that produces highly transparent and conductive properties including efficient light scattering capability.

• Proceedings of the KIEE Conference
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• 2006.11a
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• pp.99-101
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• 2006

As the same concept with GIB, GIL(Gas Insulated Line) has been established and run for the first time in New Jersey, America, in 1972. At the beginning, the installation condition of GIL was complicated and the construction cost was excessive, so it was not economical, but the construction cost was substantially reduced with the use of insulation material which is the mixture of $SF_6$ and $N_2$ Gas in Germany, in 1990s. And also comparing to cable, GIL has lots of advantages, such as being capable of the high voltage transmission, being applied to reclosing and lowering the strength of electromagnetic force, Due to these advantages, GIL is recently accepted in many countries.

• Proceedings of the KIEE Conference
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• 2001.07c
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• pp.1346-1348
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• 2001

Generally, Invar alloy shows very low thermal expansion characteristics, lower than $2{\times}10^{-6}$/K approximately. To apply Fe-Ni-Co-C Invar alloy as a core material for large ampacity transmission line we studied the effects of magnetic properties on coefficient of thermal expansion. The coefficient of thermal expansion(CTE) suddenly decreases with addition of a little carbon(0.08%), increases with the increasing carbon and has a constant value at the composition over than 1.0%C. The trend of Curie temperature change with carbon is similar with that of CTE. Therefore, the CTE has a linear relationship with Curie temperature. However, the CTE linearly decreases with the ratio of saturation magnetization and Curie temperature(${\sigma}_s/T_c$).

• Journal of the Korean Society of Clothing and Textiles
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• v.24 no.7
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• pp.995-1003
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• 2000

This study examined the role of apparel merchandisers’in Korea. Data were collected by interviewing 7 apparel merchandisers who had worked for major apparel manufacturers. The interviews were analyzed by use of chronologically sequenced events. Korean apparel merchandisers take part in planning and production of the merchandise, sales management, and promotion. Merchandisers’activities related to merchandise planning were as follows: analysis of fashion trend and market, concept evolvement, planning of assortment and volume assortment, time table set up, color pallette decision, fabrication, line adoption, pricing, line preview, production planning, and placing order of materials. Merchandisers’activities related to apparel production were planning and controlling production and consolidation. In sales, merchandisers analyze retail sales and control inventory by reorder or conducting markdown sale. In relation to promotion, apparel merchandisers monitor merchandise advertisement, and educate salesman.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1996.11a
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• pp.806-809
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• 1996

The present development relates to an apparatus for loading or unloading a workpiece, and more particularly, to an apparatus for loading or unloading a workpiece from a press die or supplier An apparatus for loading or unloading a workpiece has been installed in a press in order to load or unload a workpiece from a press die. There has been known such a loading or unloading apparatus as the apparatus can feed a workpiece in not only the horizontal direction but also in the vortical direction. Press working system in automotive factories are now switching over to a transfer press work ing system. The current problem to be sieved immediately is to automate the existing manual press lines for the manpower saving and speedy production. “Automation system for press line”has just been developed to meet the above trend. The loader and unloader are development under the design concept for high performance, easy control and operational safety to meet the more extensive.

• 전기의세계
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• v.19 no.3
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• pp.18-25
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• 1970

Chesin-1 telephone currently used in Korea is quite similar in design to early Japanese model of Type-4 telephone which is now being replaced by Type-600 having much improved characteristics. Chesin-1 telephone has a relatively high side-tone level, since the line impedance was taken as a purely resistive component for simplicity in the design of its transmission networks. To meet a current trend of using a smaller diameter of wire for telephone line, it is necessary to improve the present type which has a limited receiving efficiency. A new telephone set has been designed to have an amplifier and a R-C coupled side-tone balancing network. The set offers 8dB gain in the overall performance of transmitting and receiving without any unbearable side-tone disturbances. The paper describes both theoretical and experimental characteristics of the new set.

• Proceedings of the KIEE Conference
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• 2000.11c
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• pp.452-454
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• 2000

In recent years, the Thin Film Transistor Liquid Crystal Display (TFT-LCD) is used in a variety of products as an interfacing device between human and them. Since TFT-LCDs have trend toward larger Panel sizes and higher spatial and/or gray-scale resolution, pixel charging characteristic is very important for the large panel size and high resolution TFT-LCD pixel characteristics. In this paper, both data line precharging method and line time extension (LiTEX) method is applied to Pixel Design Array Simulation Tool (PDAST) and the pixel charging characteristics of TFT-LCD array were simulated, which were compared with the results calculated by both PDAST In which the conventional device model of a-Si TFTs and gate step method is implemented.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.281-285
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• 2008

The railroad roadbed plays an important role in distributing and transferring the train loading to subgrade, preventing subgrade from bearing softened by providing appropriate stiffness for subgrade, and eventually supporting the track structures. Presently, the reinforced roadbed was widely constructed in high speed line and is proceeding a research about economical thickness and methodologies for the design of reinforced roadbed. Field test section is located at Kyungbu line which is from Suwon to Cheonan In this study, field test were measured a track irregularity with several types of reinforced roadbed materials by using Track Master. The field testing were conducted between March, 2006 and April, 2008.