• Proceedings of the IEEK Conference
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• 2002.07c
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• pp.1420-1423
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• 2002

The classification and recognition of two-dimensional trademark patterns independently of their position, orientation, size and scale by proposing two feature vectors has been discussed. The paper presents experimentation on two feature vectors showing size- invariance and scale-invariance respectively. Both feature vectors are equally invariant to rotation as well. The feature extraction is based on local as well as global statistics of the image. These feature vectors have appealing mathematical simplicity and are versatile. The results so far have shown the best performance of the developed system based on these unique sets of feature. The goal has been achieved by segmenting the image using connected-component (nearest neighbours) algorithm. Second part of this work considers the possibility of using back propagation neural networks (BPN) for the learning and matching tasks, by simply feeding the feature vectosr. The effectiveness of the proposed feature vectors is tested with various trademarks, not used in learning phase.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2001.05a
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• pp.295-300
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• 2001

The progressive die performs a series of fundamental sheet metal working, particularly this study regards to develop the center carrier feeding type die for thick sheet metal(SS41, 2.5mm) production that is a specific division. In order to prevent defect on the production, the analysis of production part, optimum design of strip process layout, die design and die making and tryout etc. are necessary. In this study, we designed and predicted a progressive die of multi stages by wide collected data base and computer aided method.

• IE interfaces
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• v.12 no.1
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• pp.32-42
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• 1999

This paper proposes and implementation procedure for an automatic assembly system from a manual assembly and an evaluation method of implemented several automatic system alternatives using an AHP (Analytic Hierarchy Process) in a small-sized motor. First, the current product is redesigned for DFA (Design For Assembly) and assembly automation of motor, and then it is decided mechanisms of moving, magazining, feeding, composing of each part using main joining equipment and auxiliary equipment. Following the decided mechanism, the necessary assembly machines are selected or designed considering objectives and assembly conditions. Finally, the layout alternatives are completed for the automatic assembly system. According to the evaluation criteria which are established in advance, the automatic system alternatives are analyzed using AHP.

• Korean journal of applied entomology
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• v.35 no.2
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• pp.137-139
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• 1996

The sycamore lace bug, Corythucha ciliata (Say), attacking a sycamore tree, Platatanus orientalis L., was first found in Korea, and was widely distributed in the central part of the country. The adult was milky white in color and 3.0-3.2 mm long, and the matured nymph was black. Heavily infested trees appear yellowish white as a result of feeding by the nymphs on the under surface of leaves.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2002.10a
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• pp.347-352
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• 2002

The Cut off-type progressive die for U-bending production part is a very specific division. This study reveals the sheet metal forming process with multi-forming die by Center Carrier type feeding system. Through the FEM simulation by DEFORM, it was accepted to u-bending process as the first performance to design of strip process layout. The next process of die development was studied according to sequence of die development, i.e. die structure, machining condition for die making, die materials, heat treatment of die components, know-how and so on. The feature of this study is the die development of scrapless progressive die of multi-stage through the Modeling on the I-DEAS program, components drawing on the Auto-Lisp, CAD/CAM application, ordinary machine tool operating and revision by tryout.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.02a
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• pp.67-72
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• 2002

자탈형 콤바인 부착용 곡물유량센서를 개발하여 실내시험과 포장시험을 실시한 결과 아래와 같은 결과를 얻었다. 가. 실내시험에서는 곡물유량과 단위 시간당 발생된 충격량과의 관계는 결정계수로 0.937의 높은 정밀도를 보였다. 나. 포장시험에서는 실내시험보다는 정밀도가 낮았지만, 구획 1에서는 결정계수가 0.612, 구획 2에서는 0.706을 보였다. 구획 1에서 얻어진 회귀식을 이용하여 구획 2의 값을 구한 결과, 예측유량과 실측유량과의 관계가 결정계수로 0.706을 보였으며, SEP는 0.026kg/s, Bias는-0.014kg/s를 보였다.

• IE interfaces
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• v.6 no.2
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• pp.53-65
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• 1993

This paper deals with the development of a software module for production planning and scheduling activities of an existing Flexible Machining and Assembly System (FMAS). The Production Planning Module uses the hierarchical and sequential scheme based on "divide and conquer" philosophy. In this module, routes are determined based on the production order, orders are screened, tools are allocated, and order adjustments are executed according to the allocated tools. The Scheduling Module allocates the resources, determines the task priority and the start and completion times of tasks. Re-scheduling can be done to handle unforeseen situations such as lumpy demands and machine breakdowns. Since all modules are integrated with a central database and they interface independently, it is easy to append new modules or update the existing modules. The result of this study is used for operating the real FMAS consisting of a machining cell with 2 domestic NC machines and a part feeding robot, an assembly cell with a conveyor and 3 robots, an inspection cell, an AGV, an AS/RS, and a central control computer.

• Proceedings of the PSK Conference
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• 2002.10a
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• pp.334.2-334.2
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• 2002

As the part of our continuing study for antihyperlipidemic agents from the herbal medicinal resources. we examined the possibility of the ethylacetate fraction of Alpinia officinarum water extract in vitro and in vivo. We isolated some compounds from the ethylacetate fraction of Alpinia officinarum and measured their antihyperlipidemic activities. The active components isolated by silicagel column lmproved serum TG. HDL and LDL level in corn oil feeding and triton WR-1339 induced hyperlipidemic mice. The most active compound was 3-Methylethergalangin. Consequently. these biologically active gerbal functional foods could be used for preparing the healthy food which might diabetas. hyperlipidemia and other disease.

• Journal of Veterinary Clinics
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• v.38 no.6
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• pp.290-294
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• 2021

An 8-year-old neutralized male Dachshund was presented with severe vomiting, anorexia, and weight loss for two weeks. The patient had to feed in a standing position due to problem of vomiting immediately after meal. Serum chemistry and CBC results were all within reference limits. CT imaging revealed a mass distributed widely in the caudal part of the esophagus including the sphincter and the gastric cardia. Complete surgical removal was difficult because of adhesion to the caudal vena cava. A partial surgical excision and gastropexy with MIC-key feeding tube were performed under the owner's permission. Histologically, the mass was interpreted as leiomyoma. This patient is doing well at present time, six years after the tube installation in 2015.

• Journal of the Korean Society of Tobacco Science
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• v.31 no.1
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• pp.18-28
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• 2009

This study describes the manufacturing method of antioxidant filter and evaluate the reduction of free radical and biological activity from mainstream smoke. When we used spray-brush for the application of antioxidant solution to the filter, cv(coefficient of variation) levels of antioxidant added to filter ranged within 3 %, which means stable and constant feeding process. 0.3~0.5mg per cigarette of antioxidant were sprayed to acetate and active carbon part in the filter plug, respectively. It was considered that the use of antioxidant added filter resulted in the reduction of the gaseous compounds of free radicals from 17 % to 19 % in the mainstream smoke. Variation for removal efficiency of free radical in antioxidant filter added to acetate part was more pronounced than that of filter added to active carbon part. Smoking deliveries of tar, nicotine for the antioxidant added filters were similar when comparing to the non-antioxidant added filter, but the delivering amounts of isoprene were significantly reduced. The estimation of consumed GSH(glutathion) showed that the gaseous toxicity of the antioxidant added filter was 14 % ~ 23 % lower than that of non-antioxidant added filter. No significant differences were observed for the total taste quality in sensory evaluation.