• 농촌계획
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• 제7권2호
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• pp.33-40
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• 2001

The purpose of this paper is on identifying spatial structure of Palwang and Taechon village and dealing with restoration direction of village spatial structure and village groves. The results are as follows. It was identified that the standing stone for penis form is not standing stone for praying son but complementing that for enforcing enclosed function of enclosing village groves. It was considered that village entrance and entrance road, village grove of Taechon village must be restored for being identified as standing stone of penis form of spatial structure of village. It was considered that the above is essential to connect with ecotourism of Sunchang-gun region. It was identified that Palwang village grove is very good in conservation state, but Taechon village grove has been destructed mostly by various development. It was identified that Palwang village grove is high in species diversity and in scare value as mixed forest, landscape value. The dominent tree of Palwang village was Pinus densiflora and that of Taechon was Salix glandulosa. Salix glandulosa was used pavilion tree, main tree in both village. It was identified that Carpinus tschonoskii is showing the most rapid growth in tree height and Salix glandulosa is showing the most rapid growth in tree breadth diameter of all kind of tree. It was considered that Pinus densiflora was planted first of all and deciduous trees were complemented later. It was considered that simple forest of Pinus densiflora has been changed into mixed forest by artificial affect in the long term. It was considered that Salix glandulosa in Palwang village grove must be indicated as legal protection tree according to present criteria of protection tree selection in Korea. And it is considered desirable that standing stone of penis form and village grove in Palwang village must be indicated unitedly as cultural conservation element.

• 한국세라믹학회지
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• 제53권2호
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• pp.241-245
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• 2016

The purpose of this study was to investigate the bloating mechanism of artificial lightweight aggregates with different sizes (ESA, effective surface area). Aggregates were produced using hard clay, stone sludge, and a bloating agent in order to observe the effect of the gradation of the artificial lightweight aggregates. Kerosene and amorphous carbon were used as bloating agent. The particle size of the produced aggregate ranged from 3 mm to 9 mm. With regard to the amount of bloating agent to be used, 2 ~ 6 parts by weight were used. The specific gravity, absorption rate, and the type of aggregates produced by rapid sintering at $1075{\sim}1200^{\circ}C$ were determined. Microstructures were observed. When ESA had a value of 1 or below, kerosene, which has a high burning rate, was found to be advantageous for use as a bloating agent. When ESA had a value of 1 or above, carbon, which has a relatively low burning rate was found to be an advantageous bloating agent. It is thought that kerosene is more advantageous, as ESA decreases, for the production of aggregates having low water absorption rate.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2021년도 춘계학술발표대회
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• pp.454-456
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• 2021

본 논문은 웹의 발달로 인하여 의료 서비스들이 기존의 Client-Server 방식의 제품에서 Web 방식의 제품으로 변경되고 있는 현대 흐름에서 인공지능 어플리케이션 또한 Web 으로 서비스 하기 위한 방법과 구현된 요로결석 AI 어플리케이션에 대해 기술한다. 이를 구현하기 위해 Python 기반의 Flask 라는 마이크로 웹 프레임워크를 사용하여 DICOM 핸들링, Pre-Processing, Mask 를 생성하고 Predict 결과를 Model Serving 을 통하여 Urinary Stone Segmentation Model 이 서비스되는 인공지능 웹 어플리케이션 동작 방식과 수행 결과를 보인다.

• International Journal of Internet, Broadcasting and Communication
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• 제12권1호
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• pp.1-6
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• 2020

In this paper, we propose a new program for university student's IT leadership renovation. Automation and Artificial Intelligence(AI) are changing the nature of work. According to MGI report, they will change the skills needed in the workforce. Leadership is one of the skills needed more of in the future at workplace including IT industry. Leadership could be defined as having 5 level leadership. According to the 5 level leadership, a program was formulated to renovate university student's self-leadership, teamwork, team leadership and finally global leadership. We named the program as Stepping-Stone Platform for Student's IT Leadership Renovation(SSP-SLR). Each level of four stepping stones consists of one semester. Student can raise their leadership skills by the program step by step. Various instruction learning methodologies are adopted to the program, including Flipped learning which has been proved effective in many ways in the field of education recently.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1993년도 가을 학술발표회 논문집
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• pp.118-123
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• 1993

The purpose of this study is to put to practical use the economical high-strength lightweight concrete manufactured by domestic materials, through the analysis on the properties of lightweight concrete with the natural zeolite and mud stone abundant in domestic and compare them with those with silica fume. As a result, it was possible to gain proper workability in the lightweight concrete with admixtures through using the superplasticizer. the optimum replacement rate of zeolite and mud stone powder is respectively 5~10%, 10~15% on unit-cement amount. The strength development rate for plain concrete is 27%, 18% at optimum replacement rate.

• 한국생산제조학회지
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• 제18권6호
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• pp.604-613
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• 2009

Recently, researches to develop phased array ultrasonic examination techniques are proceeded to diagnose dental caries and the status of surgical operation of dental implant. Sound field analysis of phased array ultrasonic transducers were carried out in order to characterizing the ultrasonic phased array beams. The sound field of ultrasonic radiation was calculated for the sample called "gypsum-improved stone" with the similar characteristics of dental materials. Industrial phased array ultrasonic devices were utilized for the insptriion of the artificial flaws machined in the gypsum-improved stone. Dental implants were made at the pig jaw bone and defect images were confirmed for the dental implants.

• 한국건설순환자원학회논문집
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• 제4권2호
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• pp.136-142
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• 2016

전 세계적으로 급격한 산업화 및 현대화가 진행됨에 따라 환경오염 또한 급격히 진행되어가고 있다. 그리고 천연골재의 무분별한 채취로 환경오염 및 분진발생 등은 심각한 문제가 되고 있다. 이에 본 연구는 시멘트 생산 시 $CO_2$ 배출량을 줄이고자 시멘트 대체재로서 산업부산물인 고로슬래그와 유동층 연소 플라이애시를 사용하고자 하였으며, 천연골재의 무분별한 채취 문제를 해결하고자 골재로서 폐자기 및 폐유리를 활용하는 인조석재에 적용하는 산업부산물 및 폐자원을 활용한 내 외장재 인조석재의 특성에 대한 기초자료를 제시하고자 하였다. 그 결과, 고로슬래그를 주 결합재로 하여 유동층 연소 플라이애시를 40% 첨가하였을 때 가장 강도가 높았으며 또한, 선행실험을 토대로 폐자기 및 폐유리의 혼입율에 따른 실험을 진행 한 결과, 폐자기 및 폐유리의 적정 혼입율은 출석률이 45% 이상 보이는 혼입율 60, 70(%)의 혼입율이 가장 적정 혼입율이라고 판단된다.

• 보존과학회지
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• 제30권4호
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• pp.383-393
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• 2014

석조문화재 균열부분과 표면 마무리를 위한 보존처리는 현재까지 에폭시수지에 다양한 충전제를 혼합하여 사용하게 된다. 장기적 보존을 위해 이와 같은 보존처리는 필요하다. 하지만 보존처리 된 54건에 대한 현장조사와 임상실험 결과 충전제 중 활석이 포함된 경우 표면변색과 균열 등 재 손상이 확인되었다. 현장조사는 수리보고서와 처리 담당자 인터뷰, 현미경조사, 현장에서 수습한 처리 시편의 ICP 분석을 병행하여 활석 사용여부를 확인하였다. 임상실험은 현장조사에서 확인된 활석에 의한 영향평가를 위해 촉진내후성시험 후 색차와 초음파측정을 실시하였으며 그 결과 활석이 포함된 시편에서의 물성저하가 두드러졌다. 따라서 향후 균열부분 보존처리는 활석의 사용은 자제하고 동질 석분만을 충전제로 선택하여 처리할 것을 제안한다.

• 보존과학회지
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• 제35권3호
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• pp.259-268
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• 2019

석조문화재는 조성된 직후부터 복합적 훼손요인에 의해 손상되거나 본래의 역사적 진정성을 잃어버린 채 현재에 이르게 된다. 원형보존과 진정성을 회복시키기 위한 다양한 인위적 개입을 원주 법천사지 지광국사탑 보존처리 사례를 중심으로 설명하였다. 지광국사탑의 보존처리는 해당 문화재의 연구와 보호에 기여하는 모든 과학적 기술적 수단을 확보한 후 진행하였으며, 지광국사탑의 미학적, 역사적 가치를 보존하고 원 재료와 원형에 대한 이해를 바탕으로 추진하였기 때문에 과도한 복원은 지양하였으며 원형보존과 진정성을 회복하는데 기여한 것으로 판단된다.

• 한국세라믹학회지
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• 제46권1호
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• pp.94-101
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• 2009

The physical properties of artificial aggregates made from clay and inorganic wastes with poor plasticity depends largely on forming method. The artificial aggregates composing of coal fly ash, stone sludge and clay were fabricated using 4 different forming methods and those physical properties were comparatively analyzed. The surface of aggregates made through the extrusion forming process was dense and smooth but was rough for the aggregates obtained by crushing a tile-shaped green body. The aggregates made by pelletizing process had a weak green strength and bumpy surface. The shell generated at surface during a high temperature sintering process induced the most aggregates to be bloated due to a dense shell. But the aggregates made through pelletizing process with dense surface layer showed no significant change in bulk density with sintering temperatures. The water absorption of aggregates decreased with sintering temperature, and that of pelletized specimen was standing $1.8{\sim}2.2$ times higher than that of made by other forming methods. It is concluded that the aggregates having various properties could be fabricated from one batch by using different forming methods.