• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.231-234
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• 2001

OBD-II regulations are already effective in many countries. The California Air Resources Board(CARB) first issued regulations in 1985 for the 1988 model year, known as OBD-I, and required the vehicle's engine management computer to warn the driver by means of a dash-mounted light if a malfunction occurred in either the oxygen sensor, the exhaust gas recirculation(EGR) valve or the evaporative emission system purge solenoid, and to store information on troubles that have no recurrent characteristics. This paper presents two methods of wireless monitoring OBD signal, which is one of the ECU output for self diagnostic measurement. RF module is used to monitor ECU's Self diagnostic signal remotely. Two kinds of measurement systems which are based on micro-controller(80C196KC) for portable detection and PC for sever are considered for receiving the RF signal. Therefore, possibility of real-time monitoring of ECU's self diagnostic signal remotely is verified on this paper.

• Journal of the Korean Society of Food Science and Nutrition
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• v.30 no.1
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• pp.127-132
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• 2001

This research was conducted to investigate the antimicrobial activities of ethanol extracts from omija against the 12 icroorganism including bacteria, yeast and mold. The extracts inhibited the growth of bacteria, but not yeast or mold. Minimum bactericidal concentration (MBC) of B. subtilis and S. aureus was 1.6~3.2 mg/mL, and those of gram(-) bacteria, including E. coli, were 6.3~12.5 mg/mL. Growth of B. subtilis and S. aureus were retarded by adding 900 ppm and 300 ppm of ethanol extracts. Anthimicrobial activity of the ethanol extracts was not destroyed by heating. In comparison of endocarps extracts with the ethanol from the seed extracts, the ethanol extracts of endocarps showed the high antimicrobial activity.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.353-354
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• 2006

The automatic inspection system is developed for the formed end part of automotive fuel pipe. The developed system has functions of outer diameter and formed end length measurement by LVDT(linear variable differential transformer) together with burr cleaning of automotive fuel pipe. The measured data are managed and controlled in real time by embedded SPC(statistical process control) program. The system is composed of mechanical part, electronic part and developed software system. These three parts operate automatically by mutual communication with each other. The developed system showed good results in finding inferior goods and efficiency improvement of the fuel pipe production line. It also eliminated the unreliable manual inspection processes and improved the confidence of product quality.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.309-310
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• 2006

This paper is about the development of surface inspection of bearing inner and outer race using machine vision. Before this system is developed, most inspections are performed by workers' naked eye. To improve both the inconvenience and incorrectness, another new tester is introduced. This system has the three sections mainly. First one is the mechanism section which transfers bearing manufactured from previous process line to the testing process in plant. Another is the inspection system which is composed of two parts: computer vision and measurement system using laser diode which inspects the defects of the bearing inner or outer race. The other is the pneumatic cylinder part controlled by Programmable Logic Controller(PLC). The system which is developed shows favorable results, and that has the advantage of convenience and correctness compared to previous system.

• Korean Journal of Food Science and Technology
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• v.15 no.4
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• pp.409-413
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• 1983

Vitamin and mineral composition of ethephon treated tomatoes were studied, and the results are summarized as follow: 1. Ascorbic acid, carotene (total and beta-carotene), thiamin and riboflavin contents in tomato fruits were not adversely affected by ethephon treatment 1 week before harvest, and these results were consistent for two consecutive years. Riboflavin content of tomatoes in 1979 was significantly higher than that in 1978, and this difference could be due to enviornmental factors. 2. Mineral content in tomato fruits were not significantly affected by ethephon treatment 1 week before harvest. Calcium and manganese contents in treated tomatoes significantly varied from year to year.

• Korean Journal of Food Science and Technology
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• v.35 no.3
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• pp.483-487
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• 2003

The antimicrobial activity of the omija extract shown at pH 6.5, which was observed in the previous research, suggested that there could be active substances other than citric acid and malic acid in the Omija extract. Therefore, attempts were made to identify antimicrobial compounds in the essential oils extracted from Omija. The results of silica gel column chromatography and GC-MS revealed that terpineol and citronellol in the essential oil were the active compounds.

• Korean Journal of Food Science and Technology
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• v.20 no.4
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• pp.594-599
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• 1988

Methods by which liquid egg could be stored in liquid state at frozen storage temperature$(-15^{\circ}C)$ with selected cryoprotectants and enzyme treatment were investiated, and quality changes in samples during storage were examined. The concentration of cryoprotectants (45% fructose and 55% glucose) to be added to egg yolk and whole egg to store them at $-15^{\circ}C$ in unfrozen state were 45.2% and 70.3%, respectively. Changes in consistency, precipitation of protein and microstructure of egg samples during storage indicated that adding cryoprotectants to liquid egg could effectively inhibit development of gelation during storage at $-15^{\circ}C$. Treating liquid egg with 0.15% papain could inhibit gelation during storage to some extent.

• Korean Journal of Food Science and Technology
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• v.21 no.1
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• pp.13-16
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• 1989

Attempts were made to fix acetaldehyde on base materials, which were selected from carbohydrates, by freeze drying. More acetaldehyde was fixed, in general, on combined base materials than single base materials, and mannitol+lactose were the best among the combined base materials tested. But the combination of mannitol and maltodextrin appeared to be more economical for the mass production. Loss of acetaldehyde during freeze drying was decreased as the concentration of the combined base material was increased, and it reached minimum at 40% of the base material. As dryer chamber pressure was reduced, loss of acetaldehyde during drying was decreased.

• Korean Journal of Food Science and Technology
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• v.28 no.2
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• pp.226-231
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• 1996

A serum-pulp method was applied to concentrate peach pulp with aroma recovery. The serum portion was concentrated to five-fold at $50{\sim}55^{\circ}C$ and $30{\sim}50$ mmHg with aroma recovery. The concentrated serum, insoluble pulp and aroma fraction were recombined to make a two-fold concentrated peach pulp. The results of GC and GC/MS analysis for volatile compounds and sensory evaluation of concentrated peach pulp indicated that flavor quality was significantly improved by addition of aroma fractions. A 10% aroma recovery appeared to be appropriate for peach pulp.

• Journal of the Korean Society of Food Science and Nutrition
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• v.27 no.1
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• pp.163-167
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• 1998

Anticarcinogenic activity of astaxanthin-contatining egg yolk(designate AEY) was investigated for mouse ascites carcinogenesis induced by mouse Sarcoma-180(S-180) cells. Female ICR mice(8mice/treatment, 7∼8weeks of age, 25±1g) were injected, i.p. with S-180 cells(1×107cell/ml PBS). Two days later, each mouse was given 0.1ml PBS containing AEY(10, 25 or 50ug/g body weight) or control egg yolk (CEY; 50ug/g body weight) every other day for 7 times. Control mice were only given 0.1ml S-180 cells and 0.1ml PBS. Mice treated with 25ug/g body weight of AEY showed 24.8 days of life, which was equivalent to 138% of control mice's life(180.0 dyas). Based on dose-dependant experiment of AFY, mice treated with 10ug/g body weight showed slightly longer life(19.4 days) relative to mice treated with control mice, and mice treated with 50ug/g body weight exhibited 21.9 days of life. Mice treated with any dose of AEY exhibited longer life than mice with CEY 50ug/g body weight. Body weight of mice treated with AEY was reduced relative to that of control mice CEY-treated mice. These results suggest than AEY inhibits the carcinogenesis of mouse ascites induced by S-180 cells.