• Korean Journal of Plant Taxonomy
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• v.52 no.4
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• pp.207-213
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• 2022

An effective pollinator was investigated based on visiting insects to confirm the pollination mechanism of Impatiens furcillata Hemsl. (cheo-jin-mul-bong-seon), an annual herb that is also a species endemic to Korea that has hardly been studied in relation to pollination ecology. The insects that visited the group of I. furcillata studied here consisted of four orders, 11 families, and 16 species; Hymenoptera had seven species (43.8%), Lepidoptera had four (25.0%), Diptera four (25.0%), and Hemiptera one (6.2%). Visiting insects were divided into those that took only nectar, those that took nectar and pollen, and those that took neither. Insects that are effective for pollination are judged considering the length and body type of their mouth parts, and Amegilla florea Smith (huin-jul-beol) is judged to be the most effective pollinator in the survey area. As a result of observing pollination behavior, when visiting a flower, A. florea, which extended its glossa, approached the front, landed on a wing petal of I. furcillata, crawled into the flower tube, and then backed up and reversed its steps, with pollen adhered to its back. The findings here present basic information about species biology related to both I. furcillata and A. florea.

• Journal of Fisheries and Marine Sciences Education
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• v.9 no.2
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• pp.149-166
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• 1997

This thesis is studied by means of operation diary of the factory ship GAECHEOG in the Sea of Okhotsk and the Sea of Bering from Jul. 1993 to Dec. 1996, We summarize these results as follows : 1. The factory ship GAECHEOG equipped trawl winch able to haul raw fish 700M/T per day and cargo winch able to unload manufactured goods 900M/T. The crews consist of 290~330 persons. 2. Factory machineries equipped surimi making plant able to process about 150M/T per day and fish meal plant able to manufacture about 70M/T per day. 3. The fishing ground from June to Nov. was the western Bering sea lying in the eastern Kamchaka peninsula and from Dec. to May, the fishing period to gather roe of a Pollack, was the Sea of Ohotsk lying in the western Kamchaka peninsula. 4. The buying catch of fish per each voyage from Dec. to May, the fishing period gathering Pollack-roe, was about 17,000~33,000M/T and from Jul. to Oct., the fishing period gathering non Pollack-roe, was about 10,000~21,000 M/T. 5. Raw fish was the most about 33,000M/T of the 2nd voyage in 1994 and was the least about 8,300M/T of the 1st voyage in 1993. Other voyages were about 13,000~18,000M/T. 6. The Pollack buying from Jul. to Nov. in the Bering sea was 5~7 fishes for one row in pan and body length about 40~50cm, and from Dec. to May in the Sea of Ohotsk was 6~8 fishes for one row in pan and body length about 37~45cm. 7. Surimi production in the 2nd voyage in 1994 was the most about 7,300 M/T, in the 1st voyage in 1993 was the least 1,900M/T and in other voyages was about 2,500~3,800M/T. The extraction rate of surimi goods for raw fish was about 17.4~26.5%. 8. Fish meal production in the 2nd voyage in 1994 was the most about 2,300 M/T, in the 1st voyage in 1993 was the least about 780M/T and in other voyages was about 1,100~1,700M/T. The extraction rate of fish meal goods for raw fish was about 7.3~10.7%. 9. Pollack-roe production was very much from Jan. to Apr. and was about 380~700M/T per each voyage. The extraction rate of Pollack-roe for raw fish was about 1.2~4.9%.

• Korean Journal of Plant Resources
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• v.24 no.2
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• pp.189-194
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• 2011

This study was performed to evaluate the effect of pinching time on growth and quality of Glycyrrhiza uralensis soil cultured in Chungbuk Agricultural Research and Extension Service from 2008 to 2009. The treated pinching time were given as the June 30, July 30, August 30, and non-pinching (control). The amounts of pinching were 20% of stem length each plant. The obtained results from this study were summarized as follows; The plant height and number of branches were higher in control than pinching treatments. The stem and leaf weight were increase with early pinching. The plant height and stem diameter were not affected by pinching time. There was no regular trends in runner growth. We found that pinching was induced root growth, and early pinching was accelerated root growth. The root yield was increased in JUN and JUL pinching treatments as 11-30% in 2 years plants and 6-11% in 3 years plants compared to control as 238 kg/10a and 432 kg/10a, respectively.

• Korean Journal of Ichthyology
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• v.35 no.2
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• pp.141-147
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• 2023

The genus Cottiusculus Jordan and Starks 1904 (Cottoidei: Cottidae) comprises four species worldwide, three species in Japan, and two species in Korea. Cottiusculus species are characterized by a compressed head and body without scales, except for lateral-line scales, a preopercle with four spines, a curved uppermost preopercular spine with small dorsal spines, and teeth on the upper jaws, vomer, and palatines. Two Cottiusculus species have been recorded in Korea: Cottiusculus gonez and Cottiusculus nihonkaiensis. Among these, "jeom-jul-hoet-dae" specimens were initially identified as Cottiusculus schmidti by many Korean Ichthyologists. However, since C. nihonkaiensis was reported by Kai and Nakabo (2009), most such specimens have been identified as C. nihonkaiensis. To clarify the taxonomic status of "jeom-jul-hoet-dae", we conducted morphological and molecular analyses collected from the coasts of South Korea, and compared our findings with previous reports. Japanese and Korean C. nihonkaiensis specimens mostly consistent in some proportional measurements, our molecular results indicate that they are the same species. C. nihonkaiensis, "jeom-jul-hoet-dae" distinguished from other congers by combination of following characters: simple nasal spines, two branched cirri at the upper jaw, cirri at the opercular, preopercular, and lateral lines, and a number of blotches below the lateral line.

• Proceedings of the KIEE Conference
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• 2007.10c
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• pp.144-146
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• 2007

High frequency voltage signal injection have been widely used but they have some problems like over current protection. High frequency current signal injection and feedback control are more stable than voltage signal injection. In this paper, high frequency current controller for self-sensing and parameter estimation of induction motors is presented.

• 한국생물공학회:학술대회논문집
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• 2005.10a
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• pp.369-370
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• 2005

• Proceedings of the Korean Society of Crop Science Conference
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• 2006.04a
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• pp.520-521
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• 2006

• YAKHAK HOEJI
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• v.45 no.6
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• pp.604-610
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• 2001

Chrysanthemum zawadskii var. latilobum (Compositae), which is called Gu-Jul-Cho, has been used as traditional medicine in pneumonia, bronchitis, common cold, pharyngitis, bladder-related disorders, women's diseases, and hypertension, etc. In this study we have investigated various biological activities of methanol extracts and their main component, linarin isolated from this herb. The antipyretic effect of them was tested by Brewers yeast method and the antiinflammatory activities, with arachidonic acid, o-tet-radecanoylphorbol 13-acetate and carrageenan. Their antipyretic and antiinflammatory activities were more potent than acetaminophene and aspirin. They also showed stronger hepatoprotective activities than ones of silymarin in mice.

• Proceedings of the KIEE Conference
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• 2005.04a
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• pp.96-98
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• 2005

This paper presents a new two-phase linear hybrid stepping motors (LHSM), which has two windings per phase and one of them shares the other phase winding. The proposed motor shows a unique ability to deliver low cogging force without any particular complex control scheme and additional power electronics hardware in micro stepping control. An analytical and experimental comparison between conventional and proposed LHSM is evaluated to confirm the effectiveness of the proposed design.

• Proceedings of the KIPE Conference
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• 2005.07a
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• pp.572-574
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• 2005

In this paper, a compensation scheme for the effect of dc-link ripple voltages on output voltage of two-leg and three-phase PWM inverters is proposed, without which compensation scheme the three-phase output voltage and current are much distorted. The proposed scheme has been verified by experimental results.