• YAKHAK HOEJI
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• v.43 no.4
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• pp.481-486
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• 1999

Excessive or long term ingestion of alcohol may cause hepatitis, cirrhosis, hepatic tumor and so on. Aldehyde and active form of free oxygen that are metabolites of alcohol in liver are the cause of liver cell damage. The main system of alcohol metabolism is composed of alcohol dehydrogenase (ADH), aldehyde dehydrogenase (ALDH) and cytochrome P450. In connection with in vivo alcohol metabolism, more than one hundred natural products were screened for inhibition or activation of alcohol dehydrogenase. As a results, we found significant inhibition ($IC_50$) of ADH by methanolic extracts of Puerariae Radix ($61.2{\;}\mu\textrm{g}/ml$), Glycyrrhizae Radix ($105.0{\;}\mu\textrm{g}/ml$), Cinnamomi Ramulus ($7.0{\;}\mu\textrm{g}/ml$), Rhei Rhizoma ($36.7{\;}\mu\textrm{g}/ml$), Mori Cortex Radicis ($106.2{\;}\mu\textrm{g}/ml$), Chrysanthemi Flos ($112.2{\;}\mu\textrm{g}/ml$), Erycibes Caulis ($36.7{\;}\mu\textrm{g}/ml$), and Scutellariae Radix ($122.5{\;}\mu\textrm{g}/ml$)

• The Korean Journal of Zoology
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• v.35 no.2
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• pp.194-202
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• 1992

This study has been performed to investigate normal synaptic organizations in the subesophageal ganglion and terminaiion of antennal receptor cells in the ipsilateral subesophageal gan91ion of Pieris rapae. The various normal synaptic organizations in subesophageal ganglion could be differentiated into the five types. The proximal removal of a left antenna resulted in the weakly-dark, semidark and dark degenerations in the type I bostons of the ipsilateral subesophageal ganglion. Therefore, it was concluded that the axon terminals of the receptor cells projecting from the antenna into the brain form the type 1 synapses together with the dendrites in the ipsilateral subesophageal ganglion.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.392-393
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• 2017

본 연구에서는 에너지 저장시스템인 ESS 에너지 분배에 관한 시스템을 설계 및 제작하고 성능을 평가하였다. ESS에 충전하는 방법은 현재 기존의 상용전원을 전지에 충전하는 방식과(연계형) 태양광 에너지를 이용한 방법(독립형)으로 나누어져 있다. 본 연구에서는 어느 한쪽을 선택해야하는 번거로움을 줄여 상용전원과 태양광을 동시에 충전할 수 있는 시스템으로 설계하였다. 이러한 방법은 날씨 및 기타 외부적 환경이 좋지 않을 경우 일반 상용전원(AC 220V)를 이용하며 외부적 환경이 좋을 때는 태양전지로 충전이 가능하도록 연계형과 독립형이 동시에 가능하도록 구성하였다. 또한 출력에서 기존의 AC 220V 출력뿐만 아니라 DC12V, 24V의 전압과 USB(5V)도 동시에 출력이 가능하게 설계하므로 필요한 전압을 외부의 인버터나 컨버터가 필요 없이 바로 사용할 수 있도록 배분하였다. 따라서 본 연구에서는 ESS의 전력을 효율적으로 배분하므로 효율성을 증가시키고 내부의 배터리를 보호하는 시스템을 구성하여 그 성능평가를 실시하였으며 실험결과 효율적으로 배분된 전력을 얻을 수 있음을 검증하였다.

• Journal of Convergence Society for SMB
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• v.5 no.1
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• pp.19-23
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• 2015

Distributed Denial of Service attack is a form of denial of service attacks, the attacker to attack a place in a number of points of attack by a wide variety of forms over the network to perform a service on a point attack . Do not use a specific server or client attempts to make a connection to many services available that prevents this attack and so normally used . Corresponding methods of DDoS attacks has a corresponding managerial aspects and technical aspects of the proposed two.

• International Commerce and Information Review
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• v.6 no.2
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• pp.171-191
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• 2004

Recently, RFID(Radio Frequency IDentification) is observed with government and connection enterprises as the central figure. RFID utilizing radio is a technology that enable exchange of information sensing and recognize object. RFID is expected that the practical use limits widens by territory that can form vast market such as logistics management according to RFID's low-cost aggravation as well as usage of life and improvement of performance because present R&D is gone vigorously. Because RFID is possible application everywhere if it is various service industries as well as logistics, industry spot, manufactory and place that flowing of goods is, is used, and is becoming big limelight from society several territories.

• Journal of Ocean Engineering and Technology
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• v.18 no.1
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• pp.22-27
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• 2004

An orthotropic steel deck system is widely adapted form for a long-span bridge. It has many advantages, such as the big reduction of dead weight, the simplicity for erection, and the reduction of the construction period. However, an orthotropic steel deck system requires a lot of welding work, which may result in defects and deformation of connection. Therefore, the research for the general behavior and fatigue strength of the several details in orthotropic steel deck bridge is necessary. The fatigue failure with distortion results from secondary stress by out-of-plane deformation; these kinds of cracks are very difficult to measure, and can not be precisely calculated through finite element analysis. This stress concentration phenomenon generates the fatigue failure around the lower scallop of the transverse rib. This paper presents improved details of the intersection between the longitudinal rib and the transverse rib of an orthotropic steel deck bridge by the third dimensional hit size test, and the finite element method, which can minimize local stress through parametric study.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2001.10a
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• pp.84-88
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• 2001

Security and degradation by broadcast is the most important part that must handle in LAN. Virtual LAN can improve LAN's degradation by method to form and manages network group logically. MAC Address VLAN algorithm that propose in this research give overlap special qualify to VLAN adding extension VID field and VID connection extent table to FDB, manage overlap extent dynamically. VLAN that apply this proposal algorithm can share information and resource in network without additional equipment. Application is possible switch or Bridge that this algorithm achieves Layer 2 functions.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2014.11a
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• pp.117-118
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• 2014

The unfloored space and floor is one of characteristic of traditional house in Korea. This space is used to connecting passage between room or entrance of house. Currently, according to decline of heat insulation property thereby becoming decrepit house, native is repairing it for block external environment such as rain, wind and so on. But, variety problem is happening from wrong repair. This object of this study is current status and analysis on problem of unfloored space and floor repair. As a result, current status of repair is classified repair type, installation position and using form. And position of problem is confirmed connection between original house and extend space.

• Structural Engineering and Mechanics
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• v.42 no.1
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• pp.55-72
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• 2012

Precast-cast insitu concrete bridge construction is widely practiced for small to medium span structures. These bridges consist of precast pre-stressed concrete beams of various cross-sections with a cast in-situ reinforced concrete slab. The connection between the beams and the slab is via shear links often included during the manufacturing process of the beams. This form of construction is attractive as it provides for standardisation, reduced formwork and construction time. The assessment of the integrity of shear connectors in existing bridges is a major challenge. A procedure for assessment of shear connectors based on vibration testing and finite element model updating is proposed. The technique is applied successfully to a scaled model bridge model and an existing bridge structure.

• Fashion, Industry and Education
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• v.15 no.1
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• pp.12-28
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• 2017

In the era of social media, marketers have struggled to understand and serve participants' diverse and multifaceted needs in a novel form of online brand community in the social-networking sites such as Facebook. Thus, this study identifies different groups of participants affiliated with Facebook brand pages based on their needs for brand connection. The need-based segments are validated by comparing results across foodservice and consumer goods. Results of cluster analysis reveal three distinct segments (i.e., residents, lurkers, and peepers) based on participants' functional, experiential, and incentive needs. Results of multivariate analysis of variance illustrate significant differences in relational tendencies for a brand of interest among these three groups. The three groups are profiled based on participants' engagement level. Findings of this study are expected to help marketers better understand the needs of diverse participants in their SNS-embedded brand community so they can develop tailored communication strategies for targeted groups.