• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2002년도 학술논문발표회
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• pp.51-55
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• 2002

The production accounts of domestic by-product is increased after 1990's. It is worried about the life reduction of dump land, as dump land's capacity have reached to limitation and the amount of construction industrial wastes is going higher Recently, Recycling aggregates could be gained from the reconstruction works using recycle process. and the study and research of recycle concretes developed concrete application methods, It could put some outcome of studies to practical use for concrete products. The methods of crushing waste concrete are going diverse. In this study, the fundamental experiments and recycling application is investigated and analyzed with use of recycling aggregate which made of mechanical crush and underwater electrical impact crush. and the difference between underwater electrical impact crush, mechanical crush and natural aggregates is studied.

• 기술혁신연구
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• 제13권1호
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• pp.213-246
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• 2005

Despite of the impressive progress made in the Evolutionary techno-economics during the last two decades, there have been very little, if not at all, theoretical advancement in explaining an endogenous mechanism of transforming a technological paradigm within self-perpetuatingstructural dynamics. The question poorly attempted was raised by Schumpeter a century ago in his effort to overcome the well-known 'Walras' trap'. Although there have been increasing number of researchers recently tackling the issue quite seriously from within the Evolutionary school, I see it that radical reconstruction of the basic principle of Evolutionary research framework is urgently needed to solve the century long fundamental question, from evolutionary approach to transformational approach. In the paper, I will show the theoretical feasibility of explaining an endogenous mechanism of paradigm transformation, relying upon the concept of localized dynamics and the concept of morphogenetic structuration. It should be emphasized that there must be aendogenous process of deepening structural Instability generated in the process of economic coordination to secure efficient circular flow. The concept of development bottleneck initiated by the Baumol's cost disease could be regarded as one of the important source of such mechanism. Unfortunately, however, it is a brief conceptual description presented in the paper rather than a comprehensive analytical model, due to the space limitation imposed.

• 한국실내디자인학회논문집
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• 제16권1호
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• pp.99-107
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• 2007

Opening special dental office like prosthetic, orthodontics and implant is getting popular from the specialization and ramification on dental service. It shows how changes onpeople's point of view on dental offices as a business and high interesting on aesthetic. The child dental office also specialized from 1990s. It had been divided by not sort of sickness but ages of children. Thus it should support not just basic functions what other dentist of vice does but also comfortable environment to guide children patients' behavior who get afraid easily. However the interior of existing the child dental office was more focused on visual decoration but consideration of space. Thus the space is very superficial and plain, so there is limitation to give suitable environment to children patients. Therefore, from this study, I will research what is the proper space to control children patients' behavior based on well balance of space and decoration designs. Also from the research, I will explain fundamental design ideas on the child dental office space.

• 복식
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• 제55권8호
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• pp.99-111
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• 2005

The research analyzed the clothing attitude which it follows in type of performance musical instrument and a design preference moral difference. The result which tries to observe the clothing attitude which it follows in type of performance musical instrument and a design preference moral difference, it was visible a difference little by little. When comparison it tries the design which it prefers but consequently most in type of performance musical instrument, the big difference is not born and not to be putting the difference of the preference design which it follows in type of musical instrument specific your neck line, color, and silhouette of the vocal musician or wind music performer. When seeing whole, the clothing attitude regarding a performance luck compared to considered seriously an aesthetic pursuit and a convenient characteristic and harmonious, there design preference is the clothes which have no sleeve, neckline like camisole, black and pastel color, design with lots of decorations, princess silhouette, and they prefer the fabrics which have softness to it. Now, I want to introduce restriction of this research and proposal. First, the fundamental research of performance's clothes is insufficient with restricted point and the literature investigation is difficult, second, it was difficult to stretch the whole market for performers because of limitation for research volunteers. Only few volunteers are from college who are majoring in music.

• 한국안전학회지
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• 제27권1호
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• pp.55-62
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• 2012

Steel plate or FRP materials have been typically used for the seismic retrofit of civil infrastructures. In order to overcome the limitation of each retrofitting material, a composite material, which takes advantages from both metal and fiber polymer materials, has been developed. In the study herein, the composite retrofitting material consists of metal part(steel or aluminum) and FRP sheet part(glass or carbon fiber). The metal part can enhance the ductility and the FRP part the ultimate strength. As a preliminary study to investigate the fundamental mechanical characteristics of the metal-FRP laminated composite material this study performed the flexural fracture test with various experimental variables including the number, the angle and the combination of FRP laminates. From the aluminum-FRP composite tests no great increase in flexural strength and flexural toughness were observed. However, flexural toughness of steel-FRP laminate composite was increased so that its behavior can be considered in the retrofit design. In addition, the angle and the kind of fibers should be carefully considered in conjunction with the expected loading conditions.

• Journal of Multimedia Information System
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• 제3권3호
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• pp.97-102
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• 2016

Deep learning enables machines to have perception and can potentially outperform humans in the medical field. It can save a lot of time and reduce human error by detecting certain patterns from medical images without being trained. The main goal of this paper is to build the optimal model for breast mass classification by applying various methods that influence the performance of Convolutional Neural Network (CNN). Google's newly developed software library Tensorflow was used to build CNN and the mammogram dataset used in this study was obtained from 340 breast cancer cases. The best classification performance we achieved was an accuracy of 0.887, sensitivity of 0.903, and specificity of 0.869 for normal tissue versus malignant mass classification with augmented data, more convolutional filters, and ADAM optimizer. A limitation of this method, however, was that it only considered malignant masses which are relatively easier to classify than benign masses. Therefore, further studies are required in order to properly classify any given data for medical uses.

• 대한안전경영과학회지
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• 제10권3호
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• pp.155-166
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• 2008

Advanced countries worldwide lead government leading management innovation by suggesting unique managing system which can be survived in global economy war including JQA of Japan and EFQM of Europe based basically on MBNQA of U.S.A. and by rewarding to suitable companies. Mckinsey, global management and consulting company points out that Korea has no management because Korean productivity level which dependence to small and medium sized companies is high by the limitation of elemental invests leading type growth strategy including labor and capital is only 1/2 of U.S.A. and 2/3 of Japan. In particular, the competitive power of Korean small and medium sized companies goes into a recession by productivity lowering according to the chinese follow-up, laboring time shortening, variety and aging, and fundamental management innovation activities for reinforcing survival and competitive power are needed. Therefore, in this study, we try to construct the model of productivity managing system of innovation type small and medium sized companies which make excellent results.

• 정보교육학회논문지
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• 제2권2호
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• pp.189-200
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• 1998

웹의 교육적 활용은 학생의 흥미 유발 및 자발적 참여와 아울러 시공간의 제약을 넘어 최신의 정보를 얻을 수 있다는 장점으로 최근 교육 기관으로부터 많은 관심을 끌고 있다. 웹의 자료를 검색하여 원하는 정보를 찾아 교육에 활용하기 위한 연구가 다방변에서 진행되고 있다. 웹 자료의 단순한 활용에서 한 차원 높여 보다 조직적이고 통합적인 웹 기반 프로젝트에 대해 소개한다. 웹 기반 프로젝트의 특징은 프로젝트의 주제에 대한 폭 넓은 경험, 통합 교과교육, 창의성 개발, 협동심 배양, 세계화 교육 등을 꼽을 수 있다. 본 논문은 웹을 기반으로하는 프로젝트의 운영에 대한 개념을 설명하고 그 특성을 살려 어떠한 분야에 활용 할 것인지 논의하고 웹 프로젝트 설계의 기본 구조를 제안한다.

• Nuclear Engineering and Technology
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• 제52권4호
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• pp.784-790
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• 2020

The accelerated corrosion by Flow Accelerated Corrosion (FAC) has caused unexpected rupture of piping, hindering the safety of nuclear power plants (NPPs) and sometimes causing personal injury. For the safety, it may be necessary to select some pipes in terms of condition monitoring and to measure the change in thickness of pipes in real time. Direct current potential drop (DCPD) method has advantages in on-line monitoring of pipe wall thinning. However, it has a disadvantage in that it is difficult to quantify thinning due to various thinning shapes and thus there is a limitation in application. The machine learning approach has advantages in that it can be easily applied because the machine can learn the signals of various thinning shapes and can identify the thinning using these. In this paper, finite element analysis (FEA) was performed by applying direct current to a carbon steel pipe and measuring the potential drop. The fundamental machine learning was carried out and the piping thinning model was developed. In this process, the features of DCPD to thinning were proposed.

• 한국환경보건학회지
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• 제34권2호
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• pp.153-160
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• 2008

Personal noise exposure was assessed in railroad operators working in 40 operation units including the Gyeongbu line, Honam line, and Janghang line between 2004 and 2006. 8-hour TWA were assessed based on the MOL (Ministry of Labor) guideline on noise evaluation, and 17% of these measurements exceeded 85 dBA while 70% were over 80 dBA. When the ACGIH TLV is adopted, 40% of measurements were over TLV (85 dBA). The noise exposure risk of railroad operators was higher for diesel locomotive operation and longer operational distances; in addition, the risk was higher for passenger car operation compared to freight car driving. Given that in Korea, over the past 30 years diesel locomotives have provided most of the railway's motive power and that hearing protective equipment is not likely to be used by workers during operation, railroad operators are at a high risk of noise-induced hearing loss. The result of audiometric test among 568 railroad operators showed that 32.6% of those tested had a hearing threshold shift of more than 40 dB. In conclusion, this study calls for more fundamental measures including noise control countermeasures within the operation areas, development of equipment that generates less noise and adopting limitation on the operation distance for a work shift.