• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.06a
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• pp.499-503
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• 2007

우리나라에서는 대다수 규제산업 부문에서 수익률 규제를 도입해 왔었다. 최근 선진국에서는 규제기관들이 수익률 규제가 지니고 있는 문제점을 보완하고, 피규제 기업의 생산성을 제고하기 위하여 유인 규제를 도입하는 경향이 있다. 슬라이딩 스케일 규제는 미국에서 특히 통신산업 부문에서 유인 규제의 한 방법으로 도입되고 있다. 이 규제방식은 기업이 생산성 향상의 일부를 소비자에게 환원하는 방식이며, 효율성과 공정성을 동시에 달성할 수 있는 잠재적 이득을 지니고 있다. 본 고에서는 전통적 규제방식인 수익률 규제와 유인 규제의 대표적 방식인 가격상한 규제를 살펴본 후, 단순한 형태의 슬라이딩 스케일 규제 모형의 경제적 특성을 고찰하고자 한다.

• Korean journal of applied entomology
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• v.56 no.4
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• pp.345-350
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• 2017

Sunflower, selected as a trap plant that can be controlled by attracting Ricania spp. adults via attraction has the highest attractiveness during the preoviposition period. Considering the ecological characteristics of Ricania spp., adults are distinguished by the preoviposition and oviposition periods and the attractiveness of sunflower to Ricania spp. adults was 91.4~95.2% higher than that of blueberry during the preoviposition period. On August 20, when Ricania spp. adults entered the oviposition season, sunflower attractiveness was low at 9.8~11.6% owing to preference for tree species. Based on the result of the selection of systemic chemicals that could be used concomitantly with sunflower, all chemicals, except etofenprox, showed a high controlling effect of over 90%, and among them, dinotefuran showed the highest insecticidal rate of 95.8%. The systemic chemicals acetamiprid, dinotefuran, thiamethoxam, and imidacloprid persisted for 13 days (survey period). Therefore, the concomitant use of sunflower and systemic chemicals can reduce the density of Ricania spp. entering farmlands and their populations in surrounding habitats, which are expected to help in stabilizing the ecosystem.

• KDI Journal of Economic Policy
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• v.21 no.2
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• pp.3-54
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• 1999

1997년의 경제위기는 근본적으로 많은 차입금에도 불구하고 장기간에 걸쳐 낮은 수익성을 보인 기업들이 불황에 직면하여 도산위험이 급증함으로써 발생한 것으로 판단된다. 그러면, 기업들의 수익성은 왜 이렇게 낮은 것일까? 본 연구는 지배대주주와 소액주주간의 갈등이 기업의 수익성을 저하시킨 한 원인으로 작용했다는 가설을 실증적으로 규명하고자 한다. 우리나라 기업들, 특히 기업집단의 경우 지배대주주의 개인소유지분은 높지 않지만 기업경영에 대한 통제력은 매우 강하다. 기업경영에 대한 감시와 책임경영이 확립되지 않는 경제에서 지배대주주가 기업자산을 개인적 이익에 따라 운영하는 경우 편익은 독점하지만 이에 따른 수익성 하락 등의 비용은 다른 주주와 소유 지분율에 따라 공유하게 되므로 사적이익을 추구할 유인이 크다. 본 연구는 1992년부터 1997년까지의 공기업 및 금융기관을 제외한 외부감사대상기업의 재무자료를 기초로 영업이익률, 경상이익률, 그리고 순이익률이 주주간의 이해상충에 의해 어떻게 영향을 받았는가를 분석하였다. 수익성 분석에 있어 상장여부, 자산운영(관계회사 및 비관계회사에 대한 투자), 재벌소속 여부, 기업규모, 재무구조 그리고 산업적 특성 및 기업의 경영 및 사업 전략적 특성을 제어하였다. 다른 조건이 동일하다고 가정하면 상장된 기업의 수익성은 비상장기업보다 낮다. 상장기업의 경우는 대주주의 소유지분이 낮은 반면에 외부주주의 비중이 높기 때문에 대주주가 개인의 이익을 추구하고자 하는 유인이 강하게 작용한 결과로 판단된다. 또한 재벌에 소독된 기업의 수익성은 독립기업들의 수익성보다 낮을 뿐만 아니라 계열회사의 유가증권 및 대여금 등에 대한 투자가 증가할수록 기업의 경상이익률 및 순이익률이 낮아진다. 반면에 비관계회사에 대한 투자자산은 경상이익률 및 순이익률을 높이는 것으로 나타났다. 재벌에 소속된 상장회사가 관계회사에 투자하는 경우는 투자기업의 수익성이 더욱 낮아지는 것으로 나타났다. 관계회사에 대한 투자는 수익성에 기초한 투자가 아니며 대주주의 지분이 낮은 상장기업에서 소액주주의 이익에 반하여 계열사에 대한 투자형태로 자원이 이전되고 있음을 시사한다. 본 논문의 분석 결과는 외부주주와 내부주주간의 이해상충이 기업의 수익성을 저하시킨다는 가설과 일관된다. 따라서 대주주가 개인적 이익을 추구하고자 하는 유인을 견제하고 소액주주의 권리를 강화하도록 지배구조를 확립해야 할 것이다.

• Korean journal of applied entomology
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• v.54 no.4
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• pp.311-316
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• 2015

This study was performed to ascertain the potential of egg plant for use as a trap plant to attract Bemisia tabaci adults compared to that of tomato. Choice tests were conducted to compare the preference of B. tabaci adults to horseweed, egg-plant, cucumber, and tomato. B. tabaci adults were found to be more sensitive to visual cues than to odor cues, and they preferred the egg-plant and cucumber to horseweed. The attraction rates of the egg-plant and cucumber to B. tabaci adults were 82.3% and 82.5% respectively, compared to that of tomato. Because egg-plants are easier to manage compared to cucumber, we excluded cucumber from subsequent experiment. The attraction rate of egg-plant to B. tabaci adults was >90% when the height of egg-plant was equal or more than that of the tomato plant.

• Korean journal of applied entomology
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• v.59 no.4
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• pp.295-301
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• 2020

In this study, we aimed to investigate the changes in the catch rate of Monochamus saltuarius, based on sexual maturation by using aggregation-sex pheromone traps. Ovariole development of caught M. saltuarius females was compared to that of the ones not caught using traps. In a mesh cage set up at the Hongneung experimental forest, we placed a multi-funnel trap with or without an aggregation-sex pheromone lure. M. saltuarius adults, which emerged from pine logs, were grouped in four according to the emergence dates (0, 1, 7, and 10 days after emergence [DAE]). We released beetles into the mesh cage to investigate the catch rate using the traps. In each group, a total of 80 beetles (20 beetles × 4 replications) were tested, making it a total of 320 beetles. Among the four groups, M. saltuarius adults in the 7 DAE group were caught more frequently using the traps, especially with a pheromone lure; the other groups showed a low catch rate. A similar number of female and male beetles were caught using the traps. Regarding ovariole development, all the female adults in the 0 and 1 DAE groups were immature, while those in the other two groups were completely developed. Therefore, aggregation-sex pheromone traps might have a limitation in the prevention of pine wilt disease because of the transmission of pine wood nematode during maturation feeding of newly emerged M. saltuarius adults. However, aggregation-sex pheromone traps can be effective for collecting sexually mature M. saltuarius adults, for the investigation of seasonal occurrence of beetles in forests.

• Horticultural Science & Technology
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• v.18 no.4
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• pp.503-507
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• 2000

This study was conducted to investigate the effect of shoot training method on the plant growth and fruit quality and yield of 'Sinsakigake-2' and 'Shishito' peppers (Capsicum annuum L.) grown in the glasshouse. Plants were either left untrained as control or trained at the third node leaving two or four shoots per plant. The untrained control plants had no pruning and therefore had all the lateral branches. The growth was enhanced in plants with two trained shoots in both cultivars. Fruit length and width, fruit weight, and pericarp thickness were not affected by the number of shoots trained. However, the percent marketable fruits was the highest in plants with two trained shoots, and the number of marketable fruits per plant was the highest in plants with four trained shoots. Marketable yield in plants with four trained shoots increased 15% in 'Sinsakigake-2' and 5% in 'Shishito' as compared to that of the control. Results of this study showed that yield and quality of pepper fruits were promoted by training with four shoots and the effect was more pronounced in 'Sinsakigake-2' than 'Shishito' pepper.

• Korean journal of applied entomology
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• v.59 no.4
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• pp.427-432
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• 2020

The ability of sunflower, bean, green perilla, and sesame to attract Metcalfa pruinosa was tested in both laboratory and field conditions. In the laboratory experiment, sunflowers showed the highest attractiveness to M. pruinosa nymphs and adults. These results were the same as those in the field experiment. Sunflowers showed the highest attractiveness among the four candidates as a trap plant for M. pruinosa, with comparable average attractiveness values for nymphs and adults to those in the laboratory. Young beans also showed high attractiveness to M. pruinosa, albeit lower than those of sunflowers. However, the attractiveness of mature beans was low. Sunflowers consistently (P < 0.05) showed significantly higher attractiveness than that of the other three plants, regardless of plant age. Thus, sunflowers would serve as a good trap plant for both the nymphs and adults of M. pruinosa.

• Korean journal of applied entomology
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• v.12 no.4 s.17
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• pp.147-151
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• 1973

A laboratory observation and a greenhouse pot experiment were carried out to know the correlationship between the attraction and the susceptibility of rice varieties to Aphelenchoides besseyi. Degrees of attraction of rice seedling extract to A. besseyi and the multiplication rates of the nematode varied greatly according to the rice varieties used. And there was strong correlation between the two variables; i.e., the more the seedling extract of a variety attracted by the nematode in agar observation, the more the variety was susceptible in greenhouse pot experiment.

• Korean journal of applied entomology
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• v.32 no.1
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• pp.76-82
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• 1993

Phonotaxis of the African mole cricket, Gryllotalpa africana palisot de Beauvois, was investigated in 1990 and 1992 at the agronomy Experiment Station of Korea Ginseng & Tobacco Research Institute in Hwaseong-gun, Kyonggi-do, Male adults produced calling sounds (calling songs) through the openings of subsurface burrows. Intensities of the sound were 77-80 dB at 15 cm above the openings. When tape recordings of male calling songs were broadcasted outdoors at 105-110 dB by two horn speakers installed at the center of a 1.4 m diameter-funnel, flying adults were attracted for 1.5 hours from about 30 minutes after sunset. Among attracted adults, 14.3-16.9% landed in the funnel, and 65.7-74.7% landed on the ground within 2m form the sound source. Females were 66.7-74.3%, which seemed to be due to the sex ratio of the population in the field. Adults landing in the funnel and at the distance of within 2m from the center of the funnel were tend to be a little more than those attracted to a blacklight trap.

• Korean Journal of Organic Agriculture
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• v.25 no.4
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• pp.759-772
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• 2017

This experiment was conducted to develop control method for Bemisia tabaci (Gennadius) on eggplant using sticky trap method. According to the color of the sticky traps, the attractiveness of the B. tabaci was the highest in the yellow trap, followed by the green and orange. However, white, blue, red, black and green sticky traps have reduced attractiveness of B. tabaci. In order to improve the efficiency and attractiveness of sticky trap to the B. tabaci, the different kinds of sugars such as glucose, fructose, oligosaccharide, starch syrup and pure sugar were added to sticky traps respectively. However, the effect of B. tabaci attractiveness was low in starch syrup, pure sugar, and non-treated sticky traps. The attracting effect of B. tabaci was depending on the location of sticky trap. The highest value was obtained where sticky traps were located in the top of the eggplant, followed by 30 cm above from the top level. In addition, we were installed up to 40 sticky traps to determine the optimal amount of sticky traps to control B. tabaci in eggplant. When increasing the sticky traps, the number of adult and nymphs of B. tabaci were tended to be decreased significantly. This tendency was more effective in the latter stages than in the early stages. As the number of sticky traps increased, not only the growth rate of eggplant, leaf length, and stem diameter were to be better. But also number of fruits and product marketable value were increased at the early stage of growing as well. The study had proven that the sticky traps had an effect on increasing the yield at the early stage of growth, but the efficiency of controlling decreased due to the high density of B. tabaci of the next generation.