• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.10
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• pp.34-40
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• 2008

In this paper, a device for safety inspection of a guard lamp with an automatic switch which has been recently employed in some local autonomous entities was developed. It is technically enhanced by installing a separate inspection box down below, which allows the inspectors can measure the leakage current, the sound function of the electric leakage breaker(ELB), the insulation resistance and the grounding resistance, on the ground. This inspection box makes the inspectors free from the electric shock by being designed to minimize the potential direct contact with the energized terminals. The deliverables of this paper are expected to contribute to carry out the inspection for the guard lamps safely and effectively.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2023.11a
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• pp.73-74
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• 2023

본 논문에서는 음향센서를 기반으로 한 지하시설물 화재 위험감지 방법을 제안하였다. 음향센서는 진동이나 광센서처럼 접촉식이 아니기 때문에 결로가 발생하고 있는 취약구간에 설치하여 보다 효율적으로 활용이 가능하고 지하시설물 내부에 설치된 기기나 장비들과 상호작용하거나 간섭하지 않기 때문에 안전하게 관리가 가능하다. 이러한 특징으로 지하 시설물에서 내 통행이 불편하여 관리하기 힘든 구간이나 결로가 많아 화재안전에 주의가 필요한 곳에 설치하여 전기스파크 발생 감지를통해 재난이 발생하기 이전 화재위험을 감지하는 방법론 중 하나가 될 수 있다. 제안하는 방법은 음향 센서를 통해 지하공동구 안에서 발생하는 소리들을 수집하고 일정한 길이의 시간 단위 프레임들로 분할한 후 분석하여 전기스파크의 특징 벡터를 도출한다. 전기스파크 감지 모델로는 전기스파크 신호의 지역적 특성을 포착할 수 있도록 2D-CNN 구조를 사용하며 모델에서 출력된 전기 스파크 발생 예측확률을 분할된 단위 프레임 따라 계산하여 융합한다. 이로 인해 높은 정확도의 전기스파크 감지 정밀도를 얻을 수 있으며, 이는 전기 스파크에 의한 화재 이벤트 감지 있어서 효과적인 센싱 기술임을 알 수 있다.

• The Journal of Korean Academy of Prosthodontics
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• v.48 no.2
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• pp.122-127
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• 2010

Purpose: The objective of this study was to investigate the effects of calcium phosphate coated titanium implant surface on bone response and implant stability at early stage of healing period of 3 weeks and later healing period of 6 weeks. Material and methods: A total of 24 machined, screw-shaped implants (Dentium Co., Ltd., Seoul, Korea) which dimensions were 3.3 mm in diameter and 5.0 mm in length, were used in this research. All implants (n = 24), made of commercially pure (grade IV) titanium, were divided into 2 groups. Twelve implants (n = 12) were machined without any surface modification (control). The test implants (n = 12) were anodized and coated with thin film (150nm) of calcium phosphate by electron-beam deposition. The implants were placed on the proximal surface of the rabbit tibiae. The bone to implant contact (BIC) ratios was evaluated after 3 and 6 weeks of implant insertion. Results: The BIC percentage of calcium phosphate coated implants ($70.8{\pm}18.9%$) was significantly higher than that of machined implants ($44.1{\pm}16.5%$) 3 weeks after implant insertion (P = 0.0264). However, there was no significant difference between the groups after 6 weeks of healing (P > .05). Conclusion: The histomorphometric evaluation of implant surface revealed that; 1. After 3 weeks early healing period, bone to implant contact (BIC) percentage of calcium phosphate coated implants (70.8%) was much greater than that of surface untreated machined implants (44.1%) with P = 0.0264. 2. After 6 weeks healing period, however, BIC percentage of calcium phosphate coated implants group (79.0%) was similar to the machined only implant group (78.6%). There was no statistical difference between two groups (P = 0.8074). 3. We found the significant deference between the control group and experimental group during the early healing period of 3 weeks. But no statistical difference was found between two groups during the later of 6 weeks.

• Journal of Korean Home Economics Education Association
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• v.22 no.3
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• pp.147-162
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• 2010

The purpose of this study is to seek out efficient multicultural education plans by investigating Home Economics teachers' perception of multicultural families and multicultural education. Thus, a survey was carried out to collect data mainly from home economics teachers who is working for middle schools. The results of this study can be summarized as follows. Firstly, there were more teachers who had some experience of contacting with multicultural families than those who didn't have, but it was not a big difference. Also, it was found that there were not many teachers who took multicultural education-related classes for their studying at college or had multicultural education-related teachers' training for their working as a teacher. Secondly, it was found that their respect for multi-races, recognition of multi-cultures, belief in multi-cultures and acceptance attitude toward multicultural knowledge were very positive. Thirdly, it was found that most teachers had consideration -centered viewpoints most of all. On the other hand, assimilation-based viewpoints were the least among teachers. Fourthly, teachers believe that multicultural society centered contents, which is a society where people get along with each other, should be dealt in class while executing education for multicultural families. Lastly, in regard to methods of executing education for multicultural families, it was found that they showed the strongest opinion that it should be executed all over the domain of every school subject as integrated education.

• Parasites, Hosts and Diseases
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• v.28 no.3
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• pp.161-174
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• 1990

The complete life cycle of Spirometra erinacei has been experimentally maintained in the laboratory. The cyclops were reared as the first intermediate host, and the tadpoles of Rana nigromaculata as the second intermediate host. ICR mice were used as another second host. The experimental definitive hosts were dogs and cats. Maturation and hatching of the eggs took 8 to 14 days by incubation at 29℃. The coracidium measured 43.8×36.9㎛. Mesocyclops leuckarti and Eucyclops serrulatus were susceptible to the coracidial infection. The procercoids older than 5 days in the cyclops had minute spines at the anterior end, calcium corpuscles in the body parenchyme and the cercomer at the posterior end. Procercoids 10 to 20 days old were infective to tadpoles, and 15 or 21 day old worms could infect the mice. The plerocercoids from the tadpoles at 15 days after experimental infection were pear-shaped and shorter than 1 mm in the length and were infective to mice. Fifteen to 18 days after experiMental inoculation of plerocercoids to dogs or cats, the adult worms began to produce eggs. One life cycle from egg to egg needed 48 to 67 days in the laboratory. The morphology of larval or adult worms was compatible with the description of Spirometra erinacei.

• Journal of Oral Medicine and Pain
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• v.38 no.2
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• pp.109-114
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• 2013

Chemical burn on the oral mucosa is caused by contact with various chemical products and manifests with localized mucositis, keratotic white lesions, bleeding, and painful tissue surface due to the coagulation of the tissue. Policresulen ($Albothyl^{(R)}$) is a topical antiseptic, commonly used over-the-counter drug for vaginitis, thrush and stomatitis. This drug is highly acidic with pH 0.6, and can act as a strong corrosive agent to oral mucosa. When inadvertently used in oral cavity, it may cause chemical burns of oral mucosa, resulting necrosis and bleeding surface resembling to erythema multifome. A 56 years old female patient presented with the chief complaints of painful ulcerations on the tongue, the upper and lower lips. On intraoral examination, an erythromatous, erosive or ulcerative surface covered with inflammatory exudates or bleeding crust is observed on the anterior half of the tongue and the upper and lower lips. She has occasionally applied the policresulen solution topically on the tongue to relieve pain from recurrent focal glossitis for about 10 years. In this time she applied it broadly and repeatedly to the tongue, the upper and lower lips for the purpose of pain relief by herself without instruction by physician or dentist. After cessation of policresulen application, the oral mucosa was rapidly recovered with use of topical steroids. In 2 weeks the lesions subsided completely. In summary, inadvertent use of $Albothyl^{(R)}$ on oral mucosa may result in chemical burn, causing mucosal erosion, ulceration and inflammation. It can be recovered by topical use of corticosteroid for 2 weeks after cessation of using $Albothyl^{(R)}$.

• The Journal of the Petrological Society of Korea
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• v.1 no.2
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• pp.104-123
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• 1992

We present petrography, mineral chemistry of amphibole and plagioclase, and major and trace element chemistry for the Ogcheon metabasites occurring in the Poun and Mungyong areas to understand metamorphism, and to define chemical characteristics of parental rocks and their implication for tectonic environment. The Ogcheon metabasites often preserve relict igneous textures, although no primary phases are observed. They are mainly composed of amphibole (actinolite+hornblende)+plagioclase+epidote+chlorite+sphene+opaque oxides, indicating epidote amphibolite facies metamorphism. Coarse-grained amphiboles frequently have actinolitic composition in the core, and hornblende along the margin and cleavage, which can be interpreted either as miscibility gap or as result of polymetamorphism. Although presumed polymetamorphic events in the Ogcheon supergroup favor the latter possibility, further metamorphic studies are necessary to solve the problem. Amphibole and plagioclase chemistries suggest greenschist (epidote-amphibolite, if miscibility gap is present) to amphibolite facies metamorphism of possibly medium pressure. The major and trace element data of whole rocks indicate that the Ogcheon metabasites are transitional to tholeiitic basalts belonging to within-plate environment. Absence of evidences indicating deep sea environment suggests that the Ogcheon metabasites emplaced in an intra-cratonic, possibly rift environment which failed to proceed to an oceanic rift. Chemical variation of the metabasites toward a granitic pluton indicates K loss closer to the pluton, suggesting that caution should be taken when K is involved in a discussion.

• Journal of Korean Tunnelling and Underground Space Association
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• v.21 no.2
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• pp.267-278
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• 2019

Variety of tunnel ahead prediction methods have been performed for safe tunnel construction during tunnel excavation. Pole-pole array among the electrical resistivity survey, which is one of the tunnel ahead prediction method, has been utilized to predict water-bearing sediments or weak zone located within 5 times of tunnel diameter. One of the most important processes is the estimation of virgin ground resistivity and it can be obtained from the following process: 1) calculation of contact area between the electrodes and the medium, and 2) assumption of the electrodes as equivalent spherical electrodes which have a same surface area with the electrodes. This assumption is valid in a small contact area and sufficient distance between the electrodes. Since the measured resistance, in general, varies with the electrode size, shape, and distance between the electrodes, it is necessary to evaluate the influence of these factors. In this study, theoretical equations were derived and experimental tests were conducted considering the electrode size, shape, and distance of cylindrical electrodes which is the most commonly utilized electrode shape. Through this theoretical and experimental study, it is known that one should be careful to use the assumption of the equivalent half-spherical electrode with large ratio between the penetrated depth and radius of the cylindrical electrode, as the error may get larger.

• The Journal of Society for e-Business Studies
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• v.24 no.1
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• pp.105-120
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• 2019

The World Health Organization (WHO) and other government agencies aroundthe world have warned against antibiotic-resistant bacteria due to abuse of antibiotics and are strengthening their care and monitoring to prevent infection. However, it is highly necessary to develop an expeditious and accurate prediction and estimating method for preemptive measures. Because it takes several days to cultivate the infecting bacteria to identify the infection, quarantine and contact are not effective to prevent spread of infection. In this study, the disease diagnosis and antibiotic prescriptions included in Electronic Health Records were embedded through neural embedding model and matrix factorization, and deep learning based classification predictive model was proposed. The f1-score of the deep learning model increased from 0.525 to 0.617when embedding information on disease and antibiotics, which are the main causes of antibiotic resistance, added to the patient's basic information and hospital use information. And deep learning model outperformed the traditional machine hospital use information. And deep learning model outperformed the traditional machine learning models.As a result of analyzing the characteristics of antibiotic resistant patients, resistant patients were more likely to use antibiotics in J01 than nonresistant patients who were diagnosed with the same diseases and were prescribed 6.3 times more than DDD.

• Journal of International Area Studies (JIAS)
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• v.13 no.4
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• pp.251-284
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• 2010

Through specific cases, this article examines the causes and measures to overcome cultural divergences most frequently encountered by Koreans living in Vietnam and Korean-contacting Vietnamese in terms of mode of communication, mode of living and mode of doing business. Historical reality proves that Vietnam and Korea have a lot in common in history, culture and society, due to the influence from the Chinese culture on both countries. However, each country has its own acculturation, hence, there exist, apart from the normal dissimilarities, differences between the two countries especially in natural environment andpolitical systems. As a result, in Vietnam, Koreans and Vietnamese have met with quite a lot of divergences in communication, business and living activities. In order to overcome these cultural divergences, in addition to the ceaseless efforts made by Koreans in Vietnam and Korean-contacting Vietnamese, there should be concern, assistance as well as cooperation between the people and the authorities of the two countries. We should draw lessons from the groundless or trivial affairs which, springing from the Chinese people's dislike for Koreans, have been blown up and disseminated on the internet; where by we are to reconsider the relationship between Koreans and Vietnamese. What is more, Korea still feels historically ashamed to have sent nearly 350,000 soldiers to the wa rin Vietnam for economic purposes in the past. As our predecessors brought about that historic shame to get bread for our fatherland in exchange, our generation today should approach Vietnam out of a sense of responsibility towards history. Having experienced a period of economic difficulties, Vietnam innovated and started its open-door policy in 1987. However, this event should not be regarded as the reason for us to approach Vietnam with only one rigid economic principle.