• The Journal of Korean Medicine
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• v.45 no.1
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• pp.215-224
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• 2024

Objectives: This study aims to report a case of chronic nummular dermatitis improved by Hwangryunagyo-tang. Methods: The patient in this study was a 15-year-old female, who visited our hospital with symptoms such as redness, erythema, papule, excoriation, scale, exudation, crusting, lichenification, and pruritus of the extremities and trunk. Considering that the skin lesions were coin-shaped and persisted for more than 6 months, the patient's symptoms were diagnosed as chronic nummular eczema. Based on the patient's symptoms and overall condition, Hwangryunagyo-tang was prescribed. Results: Approximately 4 months after administration of Hwangryunagyo-tang, the exudate disappeared, and overall skin symptoms improved, from objective score 33.7 to 6.6, leaving only slight scale, dryness, and pigmentation. As the pruritus of the skin lesion decreased from numeric rating scale 8 to 1, the patient's sleeping condition also improved from numeric rating scale 9 to 0. Conclusion: This study is significant in that the symptoms of chronic nummular dermatitis were effectively improved after administration of Hwangryunagyo-tang.

• Journal of the Institute of Electronics and Information Engineers
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• v.53 no.8
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• pp.3-12
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• 2016

Bluetooth Low Energy (BLE) protocol has attracted attention as a promising technology for low data throughput and low energy wireless sensor networks. Fast device discovery is very important in a BLE based wireless network. It is necessary to configure the network to work with minimized energy consumption because the BLE network nodes are expected to operate a long time typically on a coin cell battery. However, since it is difficult to obtain low energy and low latency at the same time, the BLE standard introduces wide range setting of parameters related to device discovery process and let the network operators to set up parameter values for the application. Therefore, it is necessary to analyze the performance of device discovery according to the related parameter values prior to BLE network operation. In this paper we analyze the expected value and the cumulative distribution function of the number of advertisements for device discovery in the BLE network. In addition, we propose a scheme for controlling the interval between advertising events that can improve the performance of device discovery without increasing energy consumption.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.168-171
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• 2006

The Haenyeo of Jeju exists as a unique human resource only in Korea and Japan in the world. Especially, the anti-Japan opposition movement of the Haenyeo of Jeju, which had started to get the right to live on their own in 1931, had developed as the national liberation movement by struggling against a colonial of Japan and the official regulation association that was a plundering organization of Japan. Accordingly, there is making an effort to register Jeju's women divers as The National Treasure in UNESCO's Memory of the world. In this research, we are going to make stuff like a digital storytelling, characters, animation movies, games, and hompage to let our children understand and succeed the spirit and culture of the Haenyeo. We'll also use these contents for the education. We examine ways to recreate the culture resources related to the Haenyeo who gradually vanishes.

• Journal of the Korean Geographical Society
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• v.32 no.4
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• pp.527-540
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• 1997

이 글에서는 해외지역연구에 있어 세계와와 관련한 여건 변화, 지리하계의 동향, 그리고 21세기의 새로운 지역연구에 지리학의 역할이 어떠하여야 할 것인가를 살피고자 한다. 해외지역연구는 2차대전 이후 미국을 중심으로 발달하였다. 냉전기에 세계적 우위를 유지하고 국익을 보호하기 위하여 외국 현지어 구사 능력을 포함한 해외 정보 수요가 늘어 지역연구의 발달을 보게 된 것이다. 이러한 배경 때문에 지역연구는 개성기술적(ideographic)성격을 띠게 되었다. 요즘에는, 지역연구가 주로 초국적기업, 국제 경영대학원 등을 중심으로 이루어 지고 있다. 새 지역연구는 해외시장정보 수집 등 경제적 동기로 이루어지고 있어, 경제적으로 편향되는 취약점이 있다. 세계화는 요즘 하계의 화두(話頭)로, 세계 경제와 사회에 일고 있는 이 변화를 바로 이해하는 것은 향후 지역연구의 방향을 정립하는데 매우 중요하다. 세계화는 세계 어디서나 똑같이 일어나는 동질적인 현상이 아니라, 매우 다양하고 여러 의미가 담긴 현상이다. 마치 동전에 양면이 있듯이, 세계화는 수렴과 분화를 동시에 일으키고 있는 것이다. 따라서, 국경을 개방하고 장애를 없애 하나의 동질적인 세계시장환경을 지향하는 신자유경제 논리에 바탕한 지역연구는 설득력이 약하다. 지리학이 지역연구에 기여하기 위해서는 다음과 같은 노력이 계속되어야 한다. 첫째, 해외지역을 이해하려면 공간(space)과 장소(place)연구가 필수적이라는 점을 인식하고, 둘째, 인간과 환경의 상호작용 관점에서 지리적 차이를 파악하려는 노력이 필요하다. 셋째, 지리학은 이론정립 노력을 계속해야 하며, 넷째, 그 이론들은 해외지역의 현장답사와 정보수집을 통하여 검증되어야 한다. 지리학은 일찍부터 도시, 농촌 등 미시적 수준의 연구를 수행해왔기 때문에 경험적 연구에 강하다. 다섯째, 정부와 기업 등 조직에 대한 지리학적 연구가 이루어져야 할 것이다. 경제활동 분포에 대한 조직의 역할, 소유권에 대한 정부의 규제, 생산 조직의 환경 영향 등의 연구가 그 예이다. 여섯째, 지리학의 발달을 위하여 국가, 국제적 학술 기구를 활용하는 전략이 필요하다. 국제지리학연합(IGU)에서 개발한 지리교육과정, 미국National Research Council에서 세계지리에 밝지 못한 국민을 대상으로 펴낸 지리서 등이 그 사례이다. 지역연구는 사회과학 이론과 문화연구가 서로 접목되도록 새롭게 방향이 설정되어야 하며, 지리학의 인간-환경 연구 전통이 여기에 기여할 수 있을 것이다. 그러나 지리학의 역할이 효율적이기 위해서는 지리학 자체의 담론을 다시 확립해야 한다. 지리학계에서 지난 20여년간 추구해왔듯이 일반적 법칙을 지향(nomothetic)하는 접근법을 활용해야 하며, 여타 사회과학 및 환경과학과도 긴밀한 관련을 유지할 필요가 있는 것이다.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.4
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• pp.549-554
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• 2013

With the synthesis of graphene on Cu using CVD, it was tried to show the behavior of graphene growth depending on the size and orientation of Cu grain. It was found out that even under the same temperature and pressure the use of different gases influences on the diffusion rate of Cu. As compared to Ar gas, Cu grain growing bigger under $H_2$ and $CH_4$ was resulted in bigger graphene grain. Corrosion resistance was evaluated by potentiodynamic polarization test in room temperature and found out that the graphene on Cu was more stable in order of 10 than pure Cu due to the chemical stability of graphene. The future work of this research will focus on the synthesis of graphene having no defects including grain boundaries, and its engineering use.

• Composites Research
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• v.33 no.5
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• pp.251-255
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• 2020

In this study, TiC ceramic particulate reinforced steel composites was fabricated using a liquid pressing infiltration process. Studies were conducted on microstructure analysis and basic physical properties such as hardness and corrosion characteristics in salt water environment for comparison with commercial nodular cast iron. As a result of comparison of corrosion characteristics in a salt water environment, both corrosion potential and corrosion current density were lower than that of ductile graphite cast iron. The lower calculated corrosion rate confirms that the TiC-Fe metal composite has superior corrosion resistance than the cast iron.

• Journal of Advanced Marine Engineering and Technology
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• v.21 no.5
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• pp.535-541
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• 1997

The effect of concentration of each solution( HCI, $H_2SO_4$ and $HNO_3$), scan rate and polished surface condition on the corrosion of AISI 304 Stainless Steel were investigated, utilizing the Method ASTM G5 - 87. It can be concluded that: 1) For the same concentration(i.e. 1N) of each solution the corrosion rate is the highest in HCI and lowest in $HNO_3$. Also, the difference of values of $i_{cirt}$ generated for each solution is significant. 2) As the concentration of the solution $H_2SO_4$ is increased (O.5N, 1N, 2N) the values of $E_{cor}$ $i_{crit}$ and $i_{p}$ are increased. 3) In case of existence of SCN ion of O.OlN, the values of iCTIt and ip generated are approximately 100 times and 1.4 times higher respectively, than in the case of non - existence of $SCN^{-}$. However the existence of $SCN^{-}$ doesn't affect the value of $E_{cor}$ and $E_{p}$. 4) The values of $i_{crit}$ and $i_{p}$ are increased due to the increase of scan rate. But the values of $E_{cor}$ and $E_{p}$ do not depend on the scan rate. 5) The $i_{p}$ value depends greatly on oxygen in the solution, but the changes in values of $E_{cor}$ $i_{crit}$ and $E_{b}$ due to the oxygen are insignificant. 6) If a component is polished using #400, #600 and #800 wet polish paper, the effect of surface condition on variations of values of $i_{crit}$ and $i_{p}$ is slightly significant.

• Journal of Soil and Groundwater Environment
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• v.18 no.7
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• pp.1-11
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• 2013

The actively soil pollution by the toxic heavy-metals like the arsenic, cadmium, lead due to the industrialization and economic activity. The uses the electrokinetic remediation of contaminated soil has many researches against the fine soil having a small size in the on going. However, it is the actual condition which the research result that is not effective due to the low surface charge of the particle and high permeability shows in the electrokinetic remediation in comparison with the fine soil in the case of the sandy soil in which the particle size is large. In this research, the electrokinetic remediation and ultrasonic wave fetch strategy is compound applied against the sandy soil polluted by the arsenic, cadmium, and lead removal efficiency of the sandy soil through the comparison with the existing electrokinetic remediation tries to be evaluated. First of all, desorption of contaminants in soil by ultrasonic extraction in the Pre-Test conducted to see desorption effective 5~15%. After that, By conducted Batch-Test results frequency output century 200 Khz, reaction time 30 min, contaminated soil used in experiment was 500 g. Removal efficiency of arsenic, cadmium, lead are 25.55%, 8.01%, 34.90%. But, As, Cd, Pb remediation efficiency less than 1% in EK1(control group).

• Conservation Science in Museum
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• v.13
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• pp.59-69
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• 2012

The flower type ornament of the gilt bronze palace-type sarira reliquary among those sarira reliquaries of the East Pagoda at the Gameunssa Temple Site, which is the Treasure No. 1359 owned by the National Museum of Korea, was separated from the sarira reliquary in November 2010, thus conducting conservation treatments to be done on two items including the gilt bronze palace-type sarira reliquary during the period of March-October 2011. Those conservation treatments were carried out by following the process of removing the coated areas having excessive gross and bubbles, re-coating with Incralac, and then strengthening both the cracked areas and the separated flower-type ornaments with woven glass fiber after rejoining. For those areas where removal of gloss and bubbles at the coating and adhesive areas was not possible, the gloss and bubbles were made less perceivable through matting treatment and coloring.

• Conservation Science in Museum
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• v.9
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• pp.105-116
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• 2008

The Conservation Science Team of National Museum of Korea has established the data base of lead isotope ratio as the scientific research of bronze patina, which was acquired from conservtion process of metal objects, and based on this result, it intends to conduct the research related to the origin of raw material for the bronze objects. As the equipment for analysis of lead isotope ratio of the bronze patina, the thermal ionization mass spectrometer(TIMS) was used. As a part of this study, in 2nd year 2008, lead isotope ratios of total 18 samples inclding 2 samples of Round-type gold-bronze belong to Baekje period, the 2 items of head of bronze arrow belong to Nangnang(Lelang) and 10 items of the flower-shaped bronze dishes from the Unified Silla period, the 4 items of the bronze patina from the objects(era of 1 item not identified) of Wonpungtongbo(year 1078-North Sung) were analyzed.