• 한국인터넷방송통신학회논문지
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• 제16권5호
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• pp.185-190
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• 2016

국내 발전소에서 운전 중인 XLPE 케이블(또는 CV케이블)은 많은 경우 포설된 지 40년에 이르고 있다. 설치 후 운전 상태에 있는 대부분의 CV 케이블은 6~8년의 기간이 경과하면 열화가 발생하기 시작하고, 근래에 포설한 케이블이라 할지라도 사고가 발생할 수가 있으며, 사고 발생으로 인하여 막대한 손실을 초래하게 된다. 사고를 미연에 방지하기 위하여 케이블의 동작상태를 정기적으로 감시 확인하여야 한다. 우리는 케이블의 사고를 체계적으로 감시 및 예방하기 위한 목적으로 측정 시스템을 개발하였다. 이 장비는 수 년 동안 충남 태안에 소재한 한국서부발전주식회사(Korean Western Power Co. Ltd.)에서 케이블의 동작 상태를 감시하고 있다. 이 논문에서 시스템의 기능 및 동작 원리를 소개하고, 터빈 발전기 부하용 XLPE 고압케이블의 절연층 절연상태와 습도의 상간관계를 제시한다.

• Archives of Plastic Surgery
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• 제40권3호
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• pp.238-243
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• 2013

Background Primary malignant tumors of the hand, although unusual, may present varied and often complex clinical problems. The main treatment modality of skin cancer of the hand has changed. Methods We retrospectively reviewed the medical records of 43 patients who underwent surgery for malignant skin tumors of the hand during an 18-year period, from September 1994 to February 2012. The characteristics of the tumor, methods of reconstruction, and long-term results were reviewed. Results We had 43 patients with 27 melanomas, 14 squamous cell carcinomas, and 2 sarcomas. Their ages ranged from 19 to 74 years (mean, $53.4{\pm}14.5$ years), from 46 to 79 years (mean, $59.7{\pm}9.6$ years), and from 15 to 43 years (mean, $29{\pm}19.8$ years), respectively. Thirty-four cases occurred on the fingertip (16 of those cases on the thumb), 5 cases occurred on the palm, and 4 cases on the dorsum of the hand. Amputation was most frequently used in early cases, but recently, tissue-sparing excision has been performed frequently. The incidence of local recurrence was 3 cases and distant metastasis was 1 case, and the 5-year survival rate was 100%, except in 4 cases due to follow-up loss. Conclusions The principles of treatment-to be curative and to preserve function and appearance-are important points. "Preservative surgery" preserves function and cosmesis of the involved finger or hand dorsum or palm. Preservative surgery not only emphasizes less resection and surgery of a smaller scale, but also optimal reconstruction of the soft tissue defect of the digit.

• 한국임상수의학회지
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• 제25권1호
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• pp.27-30
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• 2008

5살의 수컷 치와와가 상악골의 극세포 유래 치은종양의 치료를 위해 플로리다 수의과 대학의 한방 진료과를 내원하였다. 환자를 위해 한약요법과 함께 한달 간격으로 침술요법을 적용하였다. 침자리와 한약은 환자의 한방적인 진단에 근거하여 선택되었다. 사용된 침자리는 족삼리(ST36), 퓽흉(ST40), 공손(SP4), 삼음교(SP6), 비수(BL20), 위수(BL21), 태충(LIV3), 백회(GV20)이었고, 한약으로는 내소환(內消丸: Nei Xiao Wan)과 사군자탕(四君子湯: Si Jun Zi Tang)을 사용하였다. 침술요법과 한약을 적용한지 1년 후 관찰한 결과 극세포 유래의 치은 종양이 현저하게 줄어든 것을 확인하였다. 이것으로 보아 개의 극세포유래 치은종의 치료에 있어 대체요법인 침술과 한약요법이 유용할 수 있다고 생각된다.

• 산업경영시스템학회지
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• 제40권3호
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• pp.38-48
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• 2017

ISO 9001 Quality Management Systems-Requirements has been revised in 2015. It has been updated four times since its publication in 1987. It is the most widely used International Standard in the world. There are over one million companies and organizations in over 170 countries certified to ISO 9001 from an ISO survey. Organizations are supposed to be certified to this new version by late 2018. The key changes in ISO 9001:2015 are to establish a High Level Structure (HLS) and focus on Risk-Based Thinking (RBT). Risk-Based Thinking means the process approach to decide how risk is addressed in establishing the processes to improve process outputs and prevent undesirable results. It pursues process planning and controls based on risks so that organizations can improve the effectiveness of the quality management system. It maintains and manages a Quality Management System that inherently addresses risks and meets objectives. In this article we firstly attempt to explain how to understand the fundamental concept of Risk-Based Thinking which is a systematic approach to consider risks rather than treating prevention as a separate component of a Quality Management System. We comment on the detailed requirements that contain risks in ISO 9001:2015 clauses. We also summarize recent advances on the risk assessment and management in line with ISO 31000:2009 Risk Management-Principles and Guidelines. We finally propose the practical risk management procedures for implementing ISO 9001:2015 with an emphasis on RBT. This article would contribute to help quality managers and practitioners convert to ISO 9001:2015.

• 산업경영시스템학회지
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• 제40권4호
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• pp.183-190
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• 2017

This paper proposes a dynamic magnetic field emulator (DMFE), which can electrically emulate information for the magnetic stripes of most widely used credit cards. Payment transactions with most common credit cards are performed by reading the card's information, encoded in magnetic stripes, using the reader head of a point-of-sale (POS) system. A stripe-type permanent magnet is attached to the back side of the credit card, and information for payments or value-added service is reorganized by exposing it to strong magnetic field. The process of data recording and retrieving as stated above has been pointed out as a major cause of illegal credit card use, because the information on the magnetic stripe is always exposed, and is thus vulnerable to forgery or alteration. A dynamic magnetic field emulator displays card information only when necessary by using the principle of solenoidal magnets. The DMFE proposed in this paper can prevent fraudulent use if it is operated with a device, like a smart phone, or a separate user-authentication procedure. In addition, because it is possible to display various information as needed, it can be utilized for a smart multi-card application, in which information for multiple cards is stored in one card, and can be selected and used as needed. This paper introduces the necessity of the DMFE and its manufacturing principles. As a result, this study will be helpful for making various application cases in payment, which is a core area of the Fintech (a newly-coined word of finance and technology) industry.

• 한국통신학회논문지
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• 제40권10호
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• pp.2054-2061
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• 2015

최근 생물학적으로 영감을 받은 모델링 기술은 단순한 현장 상호작용과 제한된 정보와 함께 이들의 강인성과 확장성, 적응성에 대해 상당한 관심을 받고 있다. 이러한 모델링 기술들 중, 유전자 조절 네트워크(Gene Regulatory Networks)(GRNs)은 세포로부터 생물학적 유기체의 발생과 자연 진화에 대한 이해에서 핵심적인 역할을 하고 있다. 본 논문은 GRN 원리를 무선 센서 네트워크 시스템에 적용하고 시간지연 요건을 충족하는 동시에 에너지 균형을 달성할 수 있는 분산화된 노드 스케쥴링 설계 기법을 제안한다. 각 센서 노드는 소비된 에너지 수준과 지연시간에 반응하여 자동으로 자신의 상태를 스케줄링하며, 이는 GRN 모델에서 영감을 받은 유전자 발현과 단백질 농도 조절 모델에 의해 제어된다. 시뮬레이션 결과는 제안된 방법이 에너지 균형뿐만 아니라 원하는 시간 지연에서 성능을 달성하고 있다는 점을 보여준다.

• 영재교육연구
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• 제22권2호
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• pp.467-482
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• 2012

본 연구에서는 TRIZ의 40가지 원리를 현행 교육과정 내에서 재구성하여 학교 안에서 모든 초등학생들이 창의성 신장을 위한 교육을 받을 수 있도록 하였다. 개발된 4단계의 수업모형을 적용하기 위해 TRIZ 활용 예시 자료집을 만들고 저학년용 수업지도안 및 학습지 13차시와 고학년용 수업지도안 및 학습지 12차시를 개발하였다. Y초등학교 2학년 학생과 J초등학교 6학년 학생을 대상으로 본 프로그램을 적용하였으며, 창의성을 DESK이론에 따라 유창성, 융통성, 독창성, 정교성으로 세분화하여 분석한 결과 유창성, 융통성, 독창성, 정교성이 모두 향상된 것으로 나타났다. 즉 초등학생용으로 재구성된 TRIZ 프로그램은 초등학생의 창의성 신장에 효과적임을 알 수 있었다.

• Journal of Forest and Environmental Science
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• 제40권1호
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• pp.1-8
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• 2024

Recently, intensive research has been conducted to develop innovative methods for diagnosing plant diseases based on hyperspectral technologies. Hyperspectral analysis is a new subject that combines optical spectroscopy and image analysis methods, which makes it possible to simultaneously evaluate both physiological and morphological parameters. Among the physiological and morphological parameters are classifying healthy and diseased plants, assessing the severity of the disease, differentiating the types of pathogens, and identifying the symptoms of biotic stresses at early stages, including during the incubation period, when the symptoms are not visible to the human eye. Plant diseases cause significant economic losses in agriculture around the world as the symptoms of diseases usually appear when the plants are infected severely. Early detection, quantification, and identification of plant diseases are crucial for the targeted application of plant protection measures in crop production. Hence, this can be done by possible applications of hyperspectral sensors and platforms on different scales for disease diagnosis. Further, the main areas of application of hyperspectral sensors in the diagnosis of plant diseases are considered, such as detection, differentiation, and identification of diseases, estimation of disease severity, and phenotyping of disease resistance of genotypes. This review provides a deeper understanding, of basic principles and implementation of hyperspectral sensors that can measure pathogen-induced changes in plant physiology. Hence, it brings together critically assessed reports and evaluations of researchers who have adopted the use of this application. This review concluded with an overview that hyperspectral sensors, as a non-invasive system of measurement can be adopted in early detection, identification, and possible solutions to farmers as it would empower prior intervention to help moderate against decrease in yield and/or total crop loss.

• 공학교육연구
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• 제19권1호
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• pp.3-10
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• 2016

This study was conducted to identify Korea's TRIZ research trends and to propose implications for setting a direction for future TRIZ research by analyzing TRIZ-related research over the past 15 years, or from 1998 to 2013. The subjects in this study were 256 published studies, including 149 studies in academic journals, 97 master theses, and 10 doctorate theses. This study reached the following conclusion. First, academic journals were the most frequent form of publication of TRIZ-related studies, followed by master's degree theses, and doctorate theses. Second, two or more TRIZ tools were used to solve problems and the most frequently used topic was technical contradiction as the result of frequency analysis for TRIZ research topics. This signified that it was easier to solve problems when various TRIZ tools were used, rather than applying a single TRIZ tool while technical contradiction was considered to be actively used as it allowed the relatively easy understanding of TRIZ. Third, the use of TRIZ research topics had increased and diversified each year. This could be interpreted to be based on the increased understanding of TRIZ. Fourth, case studies and experimental research were the most frequently used methods in TRIZ-related research. This was because various TRIZ tools were applied on problem solving situations, which were directly proposed as the research result. Fifth, the use of TRIZ was increasing in the educational field. Specifically, it was noted that TRIZ was used in creativity education with the use of 40 invention principles in elementary, middle, and high schools.

• 한국지진공학회논문집
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• 제19권6호
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• pp.257-263
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• 2015

Recently two seismic cloaking methods of earthquake engineering have been suggested. One is the seismic wave deflection method that makes the seismic wave bend away and the other is the shadow zone method that makes an area that seismic waves cannot pass through. It is called as seismic cloaking. The fundamental principles of the seismic cloaking by variable refractive index were explained. A two-dimensional cylindrical model which was composed of 40 layers of different density and modulus was tested by numerical simulation. The center region of the model to be protected is called 'cloaked area' and the outer region of it to deflect the incoming wave is called 'cloaking area' or 'cloak area.' As the incoming surface wave is approaching to the cloaking area, the refractive index is decreasing and, therefore, the velocity and impedance are increasing. Then, the wave bends away the cloaked area instead of passing it. Three cases are tested depending on the comparison between the seismic wavelength and the diameter of the cloaked region. The advantage and disadvantage of the method were compared with conventional earthquake engineering method. Some practical requirements for realization in fields were discussed.