• Restorative Dentistry and Endodontics
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• 제45권1호
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• pp.9.1-9.7
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• 2020

The restorative procedure in posterior teeth involves clinical steps related to professional skill, especially when using the incremental technique, which may fail in the long term. A recent alternative is bulk-fill resins, which can reduce polymerization shrinkage, decreasing clinical problems such as marginal leakage, secondary caries, and fracture. This scientific study aims to report a clinical case using bulk-fill resin with an occlusal matrix. As determined in the treatment plan, an acrylic resin matrix was produced to establish an improved oral and aesthetic rehabilitation of the right mandibular first molar, which presented a carious lesion with dentin involvement. The occlusal matrix is a simple technique that maintains the original dental anatomy, showing satisfactory results regarding function and aesthetic rehabilitation.

• 대한방사선기술학회지:방사선기술과학
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• 제23권1호
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• pp.29-37
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• 2000

Because vocal technique is the basis of singing a song beautifully, so this study was undertaken to use the scientific and correct technique in order to get much better musical expressions. Shimadzu X - ray remote control TV system was used for checking the supporting state of diaphragmatic respiration after 5, 10, 15, 20, 25 and 30 sec during phonation in the state of full inhalation between professional singer and non - professional singer. Shimadzu Magnet $nex-{\alpha}$(SMT -50CX/H) was used for examining the scattering state from the resonance of nasal cavity to that of cranial cavity on the basis of diaphragmatic respiration. The results obtained were summerized as follows : 1. The resonance of cranial cavity must be scattered by the energy of diaphragmatic respiration after gathering the foci of the fundamental 5 vowels. 2. while raising the epiglottis, the resonance of nasal cavity must be clearly in order to maintain the resonance of cranial cavity beautifully. 3. We can get musical expressions by maintaining the elasticity of diaphragmatic respiration.

• Journal of Communications and Networks
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• 제15권3호
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• pp.321-328
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• 2013

In this paper, we present a technique for obtaining conflict-free schedules for real-time automation protocol for industrial Ethernet (RAPIEnet) switches. Mathematical model of the switch is obtained using graph theory. Initially network traffic entry and exit parts in a single RAPIEnet switch are identified, so that a bipartite conflict graph can be constructed. The obtained conflict graph is transformed to three kinds of matrices to be used as inputs for our simulation model, and selection of any of the matrix forms is application-specific. A greedy edge-coloring algorithm is used to schedule the network traffic and to solve the minimum coloring problem. After scheduling, empty slots are identified for forwarding the non real-time traffic of asynchronous devices. Finally, an algorithm for synchronizing the schedules of adjacent switches is proposed using edge-contraction and minors. All simulations were carried out using Matlab.

• 산업경영시스템학회지
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• 제11권18호
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• pp.41-57
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• 1988

This study was carried out to furnish information for the appropriate standard work time measure and applicate system development that help for korean manufacturers. As a research methodology of the study, the questionnaire survey by sampling nine hundreds registerd corporation, was conducted to find the scientific management technique level (for especially standard work time). By crossectionally analyzing the survey results, placed primary emphasis on the study to comparison with employee scale and types of industry classify. The contents of subjective study art as follows; (1) Establish state of standard time(S. T) (2) Mainly technique for establish S. T (3) Institute level and correctness of S. T (4) Practical use of S. T (5) Performance rating and Allowance rate (6) Advantage and disadvantage to application results.

• 한국정보통신학회논문지
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• 제23권12호
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• pp.1738-1741
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• 2019

Music performance techniques have been primarily trained by apprenticeship. The technique transfer, which relies on the imitation of experience and actual performance without scientific evidence, required the pianists more time and effort than necessary. However, if the players in the field discover the principles of universally applicable piano playing techniques in collaboration with scientists, they will avoid errors and prepare a new paradigm in the development of piano playing techniques. This is why music performance science is needed. Little has been studied about it in Korea, but it has been activated abroad since the mid-1990s. The core science of music performance science is expected to be computer science fitting data analysis. In this paper, we introduce music performance science for the pianist and present how computer can help it.

• Animal Bioscience
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• 제36권2_spc호
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• pp.339-349
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• 2023

Gene editing (GE) offers a new breeding technique (NBT) of sustainable value to animal agriculture. There are 3 GE working sites covering 5 feasible pathways to generate GE pigs along with the crucial intervals of GE/genotyping, microinjection/electroporation, induced pluripotent stem cells, somatic cell nuclear transfer, cryopreservation, and nonsurgical embryo transfer. The extension of NBT in the new era of pig breeding depends on the synergistic effect of GE and reproductive biotechnologies; the outcome relies not only on scientific due diligence and operational excellence but also on the feasibility of application on farms to improve sustainability.

• 대한공간정보학회지
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• 제23권1호
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• pp.15-22
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• 2015

풍력자원지도의 작성을 위해 기본적으로 지형고도자료, 지면조도자료, 풍황자료가 필요하다. 그 중 지면조도자료의 경우 토지피복분류 기법을 통한 토지피복지도를 이용하여 구할 수 있다. 지면조도지도의 경우 토지피복의 성질에 따라 풍속의 조도계수가 다르게 되며, 이러한 조도계수에 근거하여 정확한 지면조도지도를 만들 수 있다. 본 연구에서는 Landsat위성자료를 이용하여 무감독 분류 방법과 식생지수법을 사용하여 지면조도자료를 생성한 후 풍력자원지도를 작성하였다. 이렇게 만들어진 풍력자원지도를 근거로 식생지수법의 사용이 무감독 분류 기법에 비하여 타당한지를 검증하였다. 그 결과, 식생지수를 사용한 풍력자원지도는 관측 자료와 비교한 경과 60% 이상의 등급 일치율을 보였고 불일치하는 픽셀에 대해서는 최대 등급의 차이를 넘지 않았다. 따라서 풍력자원지도 생성 시 필요한 지면조도지도를 계산할 경우 식생지수를 이용한 분류방법이 효과적인 것으로 판단된다.

• 융합신호처리학회논문지
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• 제3권3호
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• pp.27-35
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• 2002

지식기반 영상검색은 영상이 갖는 다양한 데이터에서 추출되어진 특징값을 지식으로 하여 질의 영상에 대한 검색 결과영상을 찾아주는 방법이다. 본 연구에서 사용한 영상자료는 자동차 전조등 영상으로 전조등 영상에 대한 입력 자료는 차량마다 다양한 패턴을 갖는 영상과 문자, 숫자 및 특수문자이다. 영상에서의 정보는 화소값들의 분포상태나 통계적 분석 및 패턴의 상태 등인데, 전조등 영상에서는 이러한 정보가 영상 검색을 위한 지식 데이터로 사용된다. 영상데이터에서 추출된 다양한 정보를 다중 지식 기반으로 하여 본 논문에서는 교통사고나 기타 차량사건의 발생 시 활용할 수 있는 영상검색 시스템을 구축하였으며, 전조등 영상의 검색에 효율적으로 적용한 다중 지식기반 검색방법을 제안하였다. 다중지식 구축을 위한 특징함수는 컬러 영상에서와 그레이레벨 영상에서 각각 필요한 성분들을 추출하여 구성하였으며, 한 개나 두 개 정도의 특징값을 사용한 기존의 방법과 달리 복합적인 특징값의 사용을 통한 다중 지식 기반의 검색방법이 컬러정보나 패턴에 대한 유사성을 높여서 용의차량의 전조등 영상 검색 효율성을 향상시켰다. 소프트웨어의 제작을 위해 비쥬얼 베이직과 크리스탈리포트 그리고 MS 액세스 데이터베이스를 사용하였다. 검색 효율성 및 특성 함수의 구성을 효과적으로 발전시키면 검색시스템은 용의 차량의 추적 및 교통사고에서 효율적인 과학수사에 일조할 것으로 기대한다.

• 한국멀티미디어학회논문지
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• 제16권10호
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• pp.1214-1229
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• 2013

Maintaining our tradition makes us have pride for our nation and plays important role for recognition and establishment of identity for our unique culture in the world. Contrast to the western scientific technique, the scientific technique of Silla Bell absorbed in the life of our nation is the fruit of wisdom science found through rich life and experience by harmony between our nation and nature. Today, ideological backgrounds for many cultural heritages weren't be found and there are many overflowing hypothesis. Silla Bell is the plastic art including cumulative utopia of the racial spirit. So there would be the information of the racial spirit including symbolization, artistry, creativity, and historicity. However, unlikely with the words, it is the profoundly concentrated shape, so the meaning can be diluted or distorted in later generation. The efforts to figure out the symbolization in Korean bells, especially Silla bell according to its exclusive shape, but no hypothesis was accepted as an established theory of academia by gaining extensive agreements. Thus this paper traces the symbolic meaning accumulated in the shape and prepares for the theoretical background accessing to the artistic spirit of forebears who created super-humanity formativeness. Also regarding the Silla bell which is regarded as the best Buddhist metal craft that people believe they can be free from the anguish at the time of listening to its sound, we studied the symbolization of the bell as the religious ritual custom as well as the possibility to utilize the bell as a motif of living art in the aspect of formative expression.

• 한국콘텐츠학회논문지
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• 제16권4호
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• pp.65-75
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• 2016

본 연구에서는 잠재적으로 발생 가능한 싱크홀(지반침하)의 위험도 평가를 위한 싱크홀 발생 위험요인을 도출하였다. 위험요인은 자연적 환경, 인위적 환경 그리고 사회적 환경을 구분하고 요인선정을 위하여 전문가를 대상으로 총 2번의 브레인스토밍 과정과 3번의 델파이 분석을 실시하였다. 분석결과 '자연적 환경'은 지상과 지하 환경으로 나누었고, '인위적 환경'은 지하 구조물, 지중 구조물, 지표 특성으로 구분하였다. 그리고 '사회적 환경'은 관리 제도적 환경과 지역개발로 구분하였다. 본 연구결과는 수자원 관리 및 지반관리 등 각 분야 전문가들의 의견이 반영된 결과로써, 싱크홀의 발생 위험도를 산정하기 위한 평가지표를 개발하는데 기초자료로 활용될 수 있을 것으로 기대된다.