• Korean Journal of Poultry Science
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• v.21 no.2
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• pp.101-111
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• 1994

From the observations of dietary self-selection by growing pullets, step-up protein or reverse protein and single-stage low protein pullet feeding systems were developed. They offered another pullet feeding concept that appears to control the body weight effectively and to reduce the consumption of feed and nutrients without impairment of subsequent laying performance. It is obvious from the feed and nutrient consumption pattern of layers fed diets for self-selection of energy, protein and calcium that they have a daily cyclic requirement rather than a constant requirement for nutrients. It seems that a practical self-selective feeding system is needed to meet the daily cyclic requirement for nutrients without consuming an excess of energy and protein at certain times of the day as compared to the complete or single diet where layers have to consume extra energy and protein in the afternoon when they have a specific appetite mainly for calcium.

• Journal of Korean Institute of Industrial Engineers
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• v.24 no.2
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• pp.211-221
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• 1998

It is very important to have a satisfactory measurement system, since it is useless to try to improve the manufacturing process without an adequate measurement system. Therefore, evaluation of the measurement system is the first step for the quality improvement of the manufacturing process. To estimate the measurement error we must conduct a controlled gage repeatability and reproducibility(gage R&R) study. Many manufacturers use a gage or instrument to measure multiple dimensions for the overall quality of the manufactured parts. In this case, it is necessary to estimate the gage R&R for multiple dimensions. When a gage measures a large number of dimensions of a part, it is very time-consuming and costly to measure all the dimensions. In this paper we propose the use of the principal component analysis method to identify a few principal components out of the original multivariate measurement capability to explain most of the measurement system variation pattern.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2007.05a
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• pp.166-171
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• 2007

Like today there is to a world-wide anger time where the culture flow is active and the life style which it follows in soul re-and economic growth of information anger and brother-in-law both culture of the world and consuming pattern against the eating and drinking space of the people are demanding the change which is various. Per the Korean-style food space composition quality instance - investigation analysis it leads and per the Korean-style food store plan hour it presents the standard of the space composition it will be able to refer with per the Korean-style food space composition plan hour efficient and rational there is the objective of the place where it provides a fundamental data to direction set of new plan.

• JSTS:Journal of Semiconductor Technology and Science
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• v.17 no.1
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• pp.48-55
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• 2017

This paper proposes a new link structure that transmits power, clock, and data through a single optical fiber for a future automotive network. A pulse-position modulation (PPM) technique is adopted to guarantee a DC-balanced signal for robust power transmission regardless of transmitted data pattern. Further, circuit implementations and theoretical analyses for the proposed PPM transceiver are described in this paper. A prototype transceiver fabricated in 65-nm CMOS technology, is used to verify the PPM signaling part of the proposed system. The prototype achieves a $10^{-13}$ bit-error rate and 0.188-UI high frequency jitter tolerance while consuming 14 mW at 800 Mb/s.

• Korean Journal of Agricultural Science
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• v.37 no.1
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• pp.113-121
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• 2010

Land consolidation ratio for rice paddy fields reached to 64.7% as of 2008 in Korea, and this also accelerated automation of field machinery. Especially, research on autonomous tractors has been continuously conducted. Tillage is one of the labor-, energy-, and time-consuming field operations. Most important requirements for autonomous tractors would be travelling path planning and electronic system to control the tractor to follow the path. The instruction of computer was required to conduct the tillage operation in field with unmanned traveling tractor. This instruction was coincidently used in the control of the traveling path and the motion of tractor. The objectives of the study were 1) to characterize and model tillage operating sequence, turning pattern, and 2) to develop tillage path formation programs for autonomous tractor and evaluate the performance.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.33A no.5
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• pp.203-211
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• 1996

This paper describes CAD tools for the construction of image database in IC chip analysis CAD system. For IC chip analysis by high-resolution microscopy, the image database is essential to manage more than several thousand images. But manual database construction is error-prone and time-consuming. In order to solve this problem, we develop a set of CAD toos that include image grabber to capture chip images, image editor to make the whole chip image database from the grabbed images, and image divider to reconstruct the database that consists of evenly overlapped images for efficient region search. we also develop an interactive pattern matching method for user-friendly image editing, and a heuristic region search method for fast image division. The tools are developed with a high-performance graphic hardware with JPEG image comparession chip to process the huge color image data. The tools are under the field test and experimental resutls show that the database construction time can be redcued in 1/3 compared to manual database construction.

• Journal of the Korean Society for Precision Engineering
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• v.15 no.2
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• pp.21-27
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• 1998

NC machining of large screw which is usually used as a part in an extruder for injection molding is done on 3-axis turning machine, and it is very time-consuming process. Not only in machining but in preparing part program for a NC machine, it requires very long time because the shape of the screw is not easy to model when using an existing general CAD/CAM software even though it is workstation level software. In addition, tool path generation procedure for NC turning for screw shape is also very tedious one because large amount of data for cutter location point must be produced and there is no specific CAM software for the machining. In this paper. development of a CAM system for screw machining which saves the role of CAD software by use of menu driven data input system for various screw shapes is introduced.

• Journal of IKEEE
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• v.22 no.3
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• pp.605-612
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• 2018

In this paper, a new method for linear sweeping of wavelength swept laser has proposed, and the linear sweeping of 1kHz speed and 80nm range has realized by using this method. The proposed requires only one-shot calibration in the early stage on a wave pattern applied to FFP-TF. This makes the problem with nonlinear swept lasers like a cumbersome and time-consuming signal processing brought on by every recalibration to be resolved.

• Journal of Korea Association of Health Promotion
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• v.3 no.1
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• pp.84-96
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• 2005

Rice is the primary main dish of Traditional Korean diet. Although there have been changes in food consumption and nutrient intake among Koreans, traditional dietary pattern is stil dominant among Koreans. Traditional Korean diet has emphasized breakfast, which is the most frequently missed meals in Korea today but important for daily work performance and health. Compared to diets of the U.S. and Greece, Korean diet is high in carbohydrate and low in fat and cholesterol due to low intake of meat. Koreans also consume large amount of plant food, which makes fiber content of diet to be high. However fruit and milk consumption tends to be low in Korea. Koreans use fermented food, including kimchi, very frequently as well as foods cooked and consumed at high temperature and over direct fire. Traditional cooking methods are time consuming which limits the usage among modern city dwellers with working women. Despite the strengths of traditional Korean diets in reducing risk factors of chronic diseases, preservation of the tradition in modern Korean society requires special attention and efforts to make them more adaptable to contemporary life styles.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.659-662
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• 2002

SL(Stereolithography) part is made by piling up thin layers which causes the stair stepping effect at the surface of SL parts. This effect brings about excessive surface roughness and requires additional post-process finishing such as abrasive techniques that are detrimental to part geometry and time consuming. Hence a wax coating and grinding post-process is proposed to improve the surface quality of SL part. The wax that has suitable properties for the proposed post-process is coated all over the part surface. By grinding the thin layer of coated on the SL part only, the surface roughness can be improved without any damage on the part. From the experimental results, This approach is considered to be very practical fur die casting with RT(Rapid Tooling) techniques.