• Korean journal of applied entomology
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• v.58 no.4
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• pp.319-320
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• 2019

We have developed simple and reliable new habitat plants system with natural enemies names as "Natural Enemy in First (NEF)" method. As a result, NEF without monitoring and release of just natural enemy with monitoring showed higher bio-control effects, i.e., 83% and 70%, respectively than environmental friendly agricultural material (EFAM) treatment. In addition, the average population density of predatory mites on NEF method was higher (three times) than other treatment.

• Journal of the Korean Institute of Intelligent Systems
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• v.8 no.2
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• pp.70-81
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• 1998

This paper proposes an accurate and cost-effective COA defuzzifier of fuzzy logic controller (FLC). The accuracy of the proposed COA defuzzifier is obtained by involving both membership values and spans of membership functions in calculating a crisp value. The cost-effectiveness of the proposed COA defuzzifier is obtained by replacing the division in the COA defuzzifier by finding an equilibrium point of both the left and right moments. The proposed COA defuzzifier has two disadvantages that it ncreases the hardware complexity due to the additional multipliers and it takes a lot of computation time to find the moment equilibrium point. The first disadvantage is overcome by replacing the multipliers with the stochastic AND operations. The second disadvantage is alleviated by using a coarse-to-fine searching algorithm that accelerates the finding of moment equilibrium point. Application of the proposed COA defuzzifier to the truck backer-upper control problem is performed in the VHDL simulation and the control accuracy of the proposed COA defuzzifier is compared with that of the conventional COA defuzzifier in terms of average tracing distance.

• Journal of Food Hygiene and Safety
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• v.23 no.1
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• pp.73-79
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• 2008

The productions of beauvericin and enniatins H, I, and MK1688 by Fusarium oxysporum KFCC 11363P were investigated on rice substrate at four temperatures (15, 20, 25, and $30^{\circ}C$) and three moisture contents (10, 20, and 40%). The largest amount of beauvericin ($718.0\;{\mu}g/g$) was produced at $25^{\circ}C$, and maximum levels of enniatin H ($781.9\;{\mu}g/g$), I ($725.8\;{\mu}g/g$), and MK1688 ($425.8\;{\mu}g/g$) were measured by high pressure liquid chromatography (HPLC) at the same temperature. The optimal moisture content for the production of beauvericin and enniatins H, I, and MK1688 was 40%, and the trace amounts of these toxins were observed at 10% moisture content. Sixty five grain samples (n=65) were tested for the monitoring of beauvericin. This mycotoxin was detected in six grain samples including three maize, two barley, and one wheat samples. The highest contamination level of beauvericin was observed in maize sample ($0.23\;{\mu}g/g$).

• Journal of the Korean Wood Science and Technology
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• v.39 no.1
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• pp.68-74
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• 2011

Cauliflower mushroom ($Sparassis$ $crispa$) is being cultivated as a functional mushroom since the mushroom contains larger amount of ${\beta}$-glucan than other edible or medicinal mushrooms. In this study, as a fundamental study for the cultivation process of cauliflower mushroom, we assayed the mycelial growth and the productivity of the mushroom cultivated on the sawdust-based medium made of larch ($Larix$ $kaempferi$) by 4 kinds of medium densities and 6 kinds of particle sizes. Low densities of sawdust-based media (0.68~0.72 g/$cm^3$) showed high variations in mycelial growth at early stage on sawdust-based medium. The coefficient of variance for the mycelial growth decreased from higher than 40% at the 3rd week to lower than 10% at the 7th week. High density of sawdust-based medium (0.80 g/$cm^3$) showed relatively lower variation in the mycelial growth at early stage with less than 30% of coefficient of variance, the high density of sawdust-based medium was thought to be quite stable compared to the lower densities of sawdust-based medium. From the viewpoint of mushroom productivity especially for the goods (excluding bottom of fruiting body), 0.76 g/$cm^3$ was better than any other densities; the return rates of fruiting body from each medium were 12.2, 13.6, 13.1, and 12.0% for 0.80, 0.76, 0.72, and 0.68 g/$cm^3$, respectively. By the way, it took about 40 days for harvesting from primordium formation with the sawdust-based medium excluded the particles less than 1 mm, while it took about 70 days with the medium including the particles less than 1 mm. The yield from the sawdust-based medium with the particles less than 1 mm was also quite less than any other sawdust-based medium especially for the goods. Therefore, we recommend that the sawdust-based medium with larch for the cultivation of cauliflower mushroom be prepared as 0.76 g/$cm^3$ in medium density with excluding the particles less than 1 mm.