• Conservation Science in Museum
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• v.24
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• pp.81-98
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• 2020

This paper presents the results of a comprehensive nondestructive analysis of Portrait of Master Gowun at Wunamyeongdang Shrine (Hereafter, Portrait of Choe Chiwon), Tangible Cultural Heritage No. 187 of Gyeongsangnam-do, including the underlying images drawn at the time of its production and the pigments present. The analysis revealed that the portrait was produced in 1793 at Ssanggyesa Temple in Hadong, Gyeongsangnam-do, which makes it the earliest known example among the extant portraits of Choe Chiwon. X-ray examination found images of a half-length boy monk and a full-length boy monk on either side of the portrait, which had been painted over and became invisible to the naked eye. XRF analysis of the pigments indicated that white lead was used for white, cinnabar and red lead for red, malachite for green, azurite for blue, and gold for gold. It was revealed that the overpainted boy monks were colored using the same pigments as those applied in the portrait of the main figure. It is hoped that the analysis of the pigments used for the boy monks can provide basic materials for research on the production of copied portraits and local Buddhist paintings. Also, additional research drawing upon other fields of study is required to examine the details of the inscription of the portrait.

• Journal of Bio-Environment Control
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• v.15 no.2
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• pp.173-176
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• 2006

The relationship between source leaf position and photo-assimilate translocation and distribution was characterized for tomato (Lycopersicon esculentum Mill) grown in the greenhouse. Three different positions of source leaf on the stem (first node above or below the first fruit cluster and $5^{th}$ node above the first fruit cluster) were tested for their influence on $^{14}CO_2$ assimilation and transfer to different parts of the plant. The leaves at the $5^{th}$ node above the first fruit cluster transferred the highest (57%) proportion of $C^{14}$ to other plant parts, followed by leaves home on the first node below the first fruit cluster (50%), and the first node above the first fruit cluster (39%). In all treatments, fruits served as the strongest sink for $C^{14}$, followed by stem, leaf, and root tissues. The leaf home on the $5^{th}$ node above the first fruit cluster transferred the largest amount of $C^{14}$ to the second fruit cluster.

• Journal of The Korean Society of Clinical Toxicology
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• v.13 no.1
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• pp.43-45
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• 2015

Sulfoxaflor is the first insecticide belonging to the sulfoximine class and is efficient against sap-feeding insects that are resistant to other insecticides. Sulfoxaflor acts as a neurotoxin to the central nervous system of insects compared with very low toxicity to mammalian. We report on a case of a 67-year-old male who ingested insecticide and received conservative treatment for mild metabolic acidosis and gastrointestinal symptoms.

• Journal of Information Technology Services
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• v.14 no.4
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• pp.199-220
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• 2015

Recently, many internet users are using mobile music service. In this paper, we aim to examine the effects of system quality factors and relation quality factors on continuance intention in the context of mobile music service. In order to analyze the antecedents of continuance intention, we introduced independent variables such as ease of use, stability, trust, involvement and unity. We also consider customer value and customer satisfaction as mediators. For empirical analysis, we surveyed 240 users of mobile music service. We conduct PLS (Partial Least Square) analysis for SEM (Structural Equation Modeling). As a result, 8 of proposed 12 hypotheses were accepted. Especially, system quality, trust and unity show positive influence on customer satisfaction significantly. Involvement and unity are positively related to customer value. Customer value and customer satisfaction show positive influence on continuance intention significantly. The results of this research can be useful guidelines for mobile music service users and providers.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.04a
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• pp.670-673
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• 2009

TinyOS는 현재 가장 널리 사용되는 센서 노드용 운영체제이지만, 태스크의 실시간성을 지원하지 않는다는 단점이 있다. 이에 TinyOS에 실시간성을 부여하기 위한 다양한 연구가 진행되었다. 그러나 이들 연구는 TinyOS의 사용자 태스크에 대한 실시간성만을 고려하여, TinyOS 플랫폼이 제공하는 태스크가 포함된 실제의 센서 노드 작업에 대해서는 실시간성을 만족시키지 못한다는 문제점이 있다. 따라서 본 논문에서는 TinyOS에서 센서 노드 작업의 실시간성을 지원하는 새로운 스케줄링 기법을 제안하고자 한다. 이를 위해 기존 연구의 스케줄링 기법을 센서 노드 작업에 적용했을 때 나타나는 작업 중첩 현상과 우선순위 조정 현상을 분석하고, 이를 효율적으로 해결하는 비선점형 EDF(Earliest Deadline First) 작업 스케줄링 기법을 구현하였다. 그리고 제안한 스케줄링 기법은 TinyOS의 이벤트 기반 비선점형 속성을 유지하여 제한된 하드웨어 자원을 가지는 센서 노드에 적합하다는 것을 확인하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.04a
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• pp.1132-1135
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• 2009

최근 지능형 선박(Smart Ship)에 탑재되는 정보화 장비의 종류 및 수량이 증가하고 있는 조선 산업계 동향에도 불구하고, 이들 장비를 효율적으로 통합하고 제어할 수 있는 선박의 백본 네트워크에 대한 연구는 미흡한 실정이다. 따라서 본 논문에서는 지능형 선박의 특수성을 고려한 백본 네트워크로, 네트워크 생존성과 트래픽 효율성 측면에서 최적 성능을 나타내는 선박 통신시스템(SAN : Ship Area Network)을 설계하고자 한다. 이를 위해 지능형 선박에 설치되는 이중화 네트워크 토폴로지 및 이를 효율적으로 운용하는 통신 프로토콜에 대한 연구를 수행하였다. 또한 제안한 선박 통신 시스템의 최적 성능을 그래프 이론, 시뮬레이션, 그리고 구현 명세 등을 포함한 체계적이고 실증적인 분석을 통해 검증하였다.

• Korean Institute of Interior Design Journal
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• v.26 no.5
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• pp.16-24
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• 2017

This study examines Safdie's design philosophy: place, purpose, and process and design strategies found in museum buildings. Safdie, influenced by personal background as immigrant, education of McGil University in Canada, apprenticeship from Louis Kahn, is one of the most recognized architects who designed renowned public and cultural buildings after Habitat 67 in Montreal, Canada. In order to reveal design strategies his eight museum buildings has been selected and analyzed in terms of interpretation of context, program presented in floor plan and section design, and the process of integrity found in structure and material. The results of this paper can be summarized as follows: 1) Reflection of existing context and regeneration of the locality has been in a creative way to reinforce the sense of place. 2) The layout of major and gallery space is determined according to the Safdie's interpretation of the site context and this can be categorized into three types. 3) Integration of the innovative structural frame and material has been experimented by using tartan grid and toroid form in the major and gallery spaces. This study is intended to reevaluate the significance of Safdie's design approach to building uniqueness of the site, program and tectonic.

• Journal of Advanced Marine Engineering and Technology
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• v.36 no.7
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• pp.869-875
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• 2012

In the past decades, extensive studies on convection heat transfer on internal flow have been conducted by using high specific surface area, by increasing heat transfer coefficient and swirl flow, and by improving the transport properties. In this study, we applied a tangential slot swirl generator to improve heat transfer in a horizontal circular copper tube. The Al-Mg particles (approximately $100{\mu}m$ to $130{\mu}m$) were employed for this experimental work. The copper tube was heated uniformly by winding a heating coil with a resistance of 9 ohm per meter for heat transfer. Using Al-Mg particles, experiments were performed in the Reynolds number range of 5,000 to 13,130, with and without swirl. Experimental data transfers or comparisons between Nusselt numbers with and without swirl along the test tube and Reynolds numbers are presented. The Nusselt number is improved by increasing Reynolds numbers or swirl intensities along the test tube.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.29 no.12
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• pp.645-653
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• 2017

Thermal and flow modeling and fin structure optimization were performed to reduce the weight of an electrical device with a staggered fin. First, a numerical model for thermal and flow characteristics was suggested, and then, the model was verified experimentally. Using the verified model, improvement in cooling performance of the cooling system through the staggered fins was predicted. As a result, 87.5% of total heat generated was dissipated through the cooling fins, and a thermal island was observed in the rotor because of low velocity of the internal air flow through the air gap. In addition, it was confirmed that the staggered fin improves the cooling performance but it also increases the total pressure drop within the cooling system, by maximizing the leading edge effect. Based on this analysis result, the effect of each design parameter on the thermal and flow characteristics was analyzed to select the main optimal design parameters, and multi-objective optimization was performed by considering the cooling performance and the fin weight. In conclusion, the optimized fin structure improved the cooling performance by 7% and reduced the fin weight by 28% without any compromise of the pressure drop.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.35 no.11
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• pp.43-52
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• 2019

The purpose of this study is to suggest the use of modular construction method in order to promote the dissemination of the Health Life Support Center of the government, and to suggest the modular unitification and modularization plan for the necessary space data in the initial stage. By analyzing the floor plans of the 50 case projects currently in operation, the 28 required spaces and their spatial proximities are determined. Base on spatial proximities, each space is unitificated into a modular unit and modularized into a modular modules were integrated to modular proposals. As a result of this study, 13 unitificated modular unit floor planes and 3 modularized module floor planes including the staircase unit were proposed. However, future study have needed to study how to apply them to different actual sites and how to reduce cost.