• 대한소아치과학회지
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• 제39권2호
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• pp.174-180
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• 2012

성장 중인 아동에서는 치근의 성장이 계속됨에 따라 치수가 괴사되어 치근의 병변이 있는 미성숙 영구치에서도 치수의 재혈관화가 실제로 일어날 수 있다는 가능성이 제시 되고 있다. 치수의 재혈관화를 위해서는 근관 내의 감염의 조절과 함께 적절한 scaffold가 필요하며, platelet-rich plasma(PRP)가 이상적인 scaffold로 제시되었다. 최근 임상에서는 PRP의 단점을 극복한 platelet-rich fibrin(PRF)가 응용되고 있다. 본 증례에서는 치외치의 교두 파절로 인한 치수 감염으로 치근단 병변을 가진 미성숙 영구치의 근관 내에 ciprofloxacin, metronidazole, minocycline의 세 가지 항생제 적용 후 이와 함께 PRF를 적용하였다. 정기적인 검진 결과 치근단 병변의 치유와 함께 치근 성장이 관찰되었다. 이러한 보존적인 근관 치료는 미성숙 영구치에서 치근단 형성술의 대안적인 치료로서 이용될 수 있을 것이며, 향후 장기간의 임상적 관찰이 필요할 것이다.

• 한국정보과학회논문지:시스템및이론
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• 제34권8호
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• pp.327-336
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• 2007

비용 효과가 좋은 디지털 시스템을 설계하기 위하여, 트랜지스터 수준부터 RTL 수준까지 최적화를 위한 다양한 설계 방법이 연구되어 왔다. 가산기는 디지털 시스템에서 가장 기본적인 산술연산을 수행하는 필수 회로로서, 전체 시스템의 성능에 영향을 줄 수 있다. 본 논문에서는 최적의 가산기를 설계하기 위하여 상위수준에서 연구하였다. 결과로 혼합 가산기 구조를 제안하고 이를 정수 선형 프로그래밍(ILP: integer liner programming)을 이용해 수학적으로 모델링한다. 혼합 가산기 구조는 다양한 캐리 전달 방식을 가진 가산기 블록을 선형적으로 연결한 구조로서, 사용된 가산기 블록의 종류와 개수에 따라 다양한 가산기 조합이 발생한다. 이러한 조합에 의해 확장된 가산기의 설계공간을 탐색함으로써, 단일 타입의 가산기만을 고려한 것보다 나은 최적의 가산기를 설계할 수 있다. 제안한 혼합 가산기 구조와 ILP를 이용한 최적화 기법은 연산시간과 회로면적 등의 특성이 다른 가산기 IP(intellectual property)들을 비트 수준에서 재합성하기 때문에, 보다 미세한 수준에서 최적화를 수행할 수 있다.

• 한국실내디자인학회논문집
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• 제18권5호
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• pp.21-30
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• 2009

A point of view has been diversified where it has been put. We are living in the era that requests many standpoints to us to understand relations involved with me and my surrounding and it will speed up as the aspect has been changed so far. This phase is not exceptional to the design. Various spaces engaged in us have an immaterial phenomenon as composed by, so it is conceptualized to try the other way differentiated before. On the other hand, we can often meet examples of a literature scenario through conceptualizing an immaterial phenomenon as organized. Because of the difference between an individual's value and environment, it is criticized because of limitation to probe right and wrong of the objective feasibility. However, it is requested that this method needs to have an organized grammar in the interconnection broken of the standard of right and wrong in the science as well as goodness, evil and beauty in the morality. Nowadays a montage, which means the way to create objective by combining different points, is more multifariously applied in the generation of mixture asking various meanings and signifier and it's been widely extended. This study intends to pursue a new methodical approach focused on a characteristic of the montage and puts the goal on deduction for an expressive way of a montage specificity practically indicated at the shopping space through the space translation of the montage conception as well as plot of a movie. In conclusion, this study is how to be expressed of the montage expression method to understand.

• 한국실내디자인학회논문집
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• 제24권6호
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• pp.79-86
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• 2015

This study started from the concern for Bjrake Ingels, an emerging architect in the architecture circle, who is creative and popular. Recently, the architecture field provides architects with a foundation to express a process on a new form creation through various new expressive languages, design concepts, and methods. The global Danish group BIG(Bjarke Ingels Group) develops a story by their distinctive architectural language. The storytelling is being used in various fields and now the tool called 'story' is settling down as an important element in the life that human lives. Bjarke Ingels leading the group BIG aims for the form expression by the scientific analysis and adaptation after being affected by Danish regional background and OMA. It creates a form to share stories with local members by visually simplifying the region, culture, environment, social phenomenon, economy, and politics that are invisible and do not have the form in the modern society. The elements and expressive features of the space storytelling include locality, cultural, natural environment, and connectivity which are the content structure(story) that enables you to intervene in the story according to the main agent to imagine a new space. The expressive element includes the watching moving line story of the successive, hierarchical, and organic structures which are constructive elements creating various spaces through the mixture, transmutability, and relocation of the program and inducing users to the space. The space storytelling is composed of the symbolism, community, and eco-friendliness to appear diversely through BIG's case analysis. This study will have significance that it drew a method and feature looked at by many contemporary architects from the storytelling viewpoint in the form-creating process, classified the form-creating process through a new storytelling type, and showed a possibility on the development of various methodologies.

• Journal of Korean Society for Atmospheric Environment
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• 제18권E1호
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• pp.29-36
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• 2002

The selective catalytic reduction (SCR) reaction of promoter catalysts was investigated in this study. A pure anatase type of TiO$_2$ was used as support. Activation measurement of prepared catalysts was practiced on a fixed reactor packing by the glass bead after filling up catalysts in 1/4 inch stainless tube. The reaction temperature was measured by K-type thermocouple and catalyst was heated by electric furnace. The standard compositions of the simulated flue gas mixture in this study were as follows: NO 1,780ppm, NH$_3$1,780ppm, $O_2$1% and $N_2$ as balance gas. In this study, gas analyzer was used to measure the outgassing gas. Catalyst bed was handled for 1hr at 45$0^{\circ}C$, and the reactivity of the various catalyst was determined in a wide temperature range. Conversion of NH$_3$/NO ratio and of $O_2$ concentration was practiced at 1,1.5 and 2, respectively. The respective space velocity were as follows . 10,000, 15,000 and 17,000 hr-1. It was found that the maximum conversion temperature range was in a 5$0^{\circ}C$. It was also found toi be very sensitive at space velocity, $O_2$ concentration, and NH$_3$/NO ratio. We also noticed that the maximum conversion temperature of (W, Mo, Sn) -V$_2$O$_{5}$/TiO$_2$ catalysts was broad. Specially WO$_3$-V$_2$O$_{5}$TiO$_2$2 catalyst appeared nearly 100% conversion at not only above 30$0^{\circ}C$ ut also below 25$0^{\circ}C$. At over 30$0^{\circ}C$, NH$_3$ oxidation decreased with decrease of surface excess oxygen. In addition, WO$_3$-V$_2$O$_{5}$TiO$_2$ catalyst did not appear to affect space velocity, $O_2$ concentration, and NH$_3$/NO ratio.ratio.

• 복식문화연구
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• 제11권1호
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• pp.118-134
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• 2003

The first purpose of this study is to take a better look it the background of Formalism art in the cultural society and to examine the aesthetic value of the formative arts of formalism architecture that are ail basically founded upon the study of Formalism. Secondly, it analyzes the aesthetic value of Formalism Art to Wear, Which can be explained as a mixture of art and fashion, by investigate to the features of art history. The results are as follows; First, Formalism Art to Wear of Simultaneity does not represent continuance but simultaneous. In other words. inside the same time and place of dimension, events art visualized without transformation. Secondly, formalism Art to Wear of Geometrical Aesthetics deals with a purely genuine atmosphere that pursues absolute perfection, composed abstract of geometrical shapes. Thirdly, Fomarlism Art to Wear of Deformation breaks analysis from balance and symmetry showing extreme transformation nil new vitality. Fourthly, Formalism Art to Wear of Space Extension experiments with post-corporeality. Post-corporeality centers the human body extension that is open to various boundaries of implosion and electronic technologies, providing us with a new Cyborg of the digital body.

• Journal of Advanced Marine Engineering and Technology
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• 제25권2호
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• pp.365-374
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• 2001

Its a tendency to strengthen related international was as the importance on marine oil pollution recently becomes the issue. According to the regulation of IMO, oil discharge from ships is allowed under 15PPM only and oil filtering equipment is essential. Oily water separator of laminated plate type which is one of gravity type separator can be use as assistant equipment for the oil filtering system to meet the present IMO standard, because it fits well to process large amount of rich oil with high specific gravity. The purpose of this paper is to investigate an efficiency of oil/water separation with the characteristics of laminated plate arrangement. The analyse of oil contents for oil-water mixture were carried out in order to find an efficiency of oil/water separation and an experimental study was simultaneously carried out to investigate internal flow characteristics of separator by visualization method and PIV(Particle Image Velocimetry) measurement at three spaces of plates for 5, 10 and 15 mm with variation of inlet flow rates of $0.25m^3$/h and $0.5m^3$/h. The experimental results showed that the space of the plates acts a significant role in the separating process.

• 한국항공우주학회지
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• 제36권5호
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• pp.491-496
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• 2008

본 연구에서는 RBCC (Rocket Based Combined Cycle)엔진이나 기존 램제트 추진기관의 초기 추력 제공에 과산화수소 가스발생기를 이용하는 새로운 추진시스템을 제안하였고, 기초 연구 수행으로서 촉매 분해된 과산화수소 제트에 케로신을 분사하여 자연발화 및 연소 특성을 연구하였다. 과산화수소는 촉매 베드를 통하여 분해된 후 축소노즐을 통해 연소실로 분사됐으며 이 제트에 인젝터를 통하여 수직으로 케로신을 액상으로 분무하였다. 연소실내에서의 온도와 압력을 측정하여 점화를 확인하고 자연발화 특성을 조사하였다. 400°C의 연소실 온도와 연료와 산화제 혼합비 0.6이상에서 자연발화와 안정적인 연소가 가능하였다. 이 결과를 통하여 램제트의 새로운 초기 가속장치의 가능성을 확인할 수 있었다.

• 한국항공우주학회지
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• 제31권8호
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• pp.69-76
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• 2003

액체로켓 연소기 내의 막냉각 특성 분석을 위한 비회체 분무연소에 대한 수치해석을 수행하였다. 막냉각 연료의 특성에 따른 연소기 벽면의 온도변화를 살펴보기 위하여 막냉각용 연료의 유랑, 막냉각용 액적의 직경, 그리고 공기/연료 혼합비를 매개변수로 한 수치해석을 수행하여 연소기 벽면의 온도는 막냉각용 연료 액적 직경의 변화에는 큰 영향을 받지 않지만 막냉각용 연료 유량 및 공기/연료 혼합비에 영향을 받고 있음을 확인하였다. 또한, 추진기관 벽면으로 전달되는 전도 및 복사열유속을 고찰함으로서 이러한 액체 추진기관의 연소특성을 이해하기 위해서는 열복사 및 물성치의 적절한 고찰이 필요함을 지적하였다.

• 한국실내디자인학회논문집
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• 제19권5호
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• pp.48-55
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• 2010

Marcel Wanders, one of the greatest designers in the world of contemporary design, was born in the Netherlands. His works run the gamut from interior design to furniture design to lighting design, building a unique world of works. He started to gain fame when he presented "Knotted Chair" at Droog Design in 1996, which was made out of aramid ropes and later became his symbol. In 2000, he established "moooi," a world-renowned design label. By giving characteristic qualities, his works are given meaning, and like a fantastical dream, their images are extremely fantastical and stimulating. As can be seen in his character cover, he puts emphasis on the harmony between minimalism and decoration, establishing his own unique design concept. In this thesis, based on Marcel Wander's design philosophy, his overall design characteristics were classified into theatrical effects and storytelling. Expressive elements depaysement, eclectic mixture, and scale modification were derived from theatrical effects and analyzed; for storytelling, object, semantic cues, and dream and fantasy were derived and analyzed. A distinguishing feature of such analysis is his meaning-centric design approach, the principle by which to form long-term relationships with the users by creating user-centric designs that make them find meaning and values in diverse experiences in their daily routine, giving them familiar yet unique experience.