• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2004년도 춘계학술발표회
• /
• pp.807-814
• /
• 2004

Land seismic reflection survey has been increasingly demanded in various civil engineering works because of its own ability to delineate layers, water table, to detect cavities or fracture zones, to estimate seismic velocities of each layer. However, our shallow subsurface structures are very complex. The relatively thin layer(mostly soil) to the wavelength directly followed by a basic rock with high impedance used to generate complicated surface waves, kind of channel waves with high amplitude that is dominate in entire seismograms and hence the useful reflection events will be almost hopelessly immersed in the undesired surface waves. Thus, it would seem that the use of traditional seismic survey could not be likely to provide in itself a satisfactory information about our exploration targets. This paper hence introduces an efficient measuring strategy illustrating a properly controlled arrangement of the vertical single force sources commonly used, yielding a very sharply elongated form of P-energy with a minimum of S radiation energy, what we call, P-beam source. Abundant experiments of physical modeling showed that in that way the surface waves could be enormously reduced and the reflection events would be additive and thus reinforced. Examples of field data are also illustrated. The contribution of P-beam source will be great in civil engineering area as well as in general geological exploration area.

• 대한기계학회논문집A
• /
• 제20권9호
• /
• pp.2770-2781
• /
• 1996

Longitudinal shear modulus of continuous fiber reinforced 2-phase composites is predicted by theoretical and numerical analysis methods. In this paper, circular, hexagonal and rectangular shapes of reinforced fiber are considered using unit cell concept. And fiber array is regular rectangular and hexagonal fiber arrangement. Longitudinal shear modulus is a function of fiber distribution pattern and fiber volume change. It is found that the rectangular array has a higher longitudinal shear modulus than the hexagonal one. Also, the rectangular fiber shape in lower fiber volume fraction and the circular fiber shape in higher fiber volume fraction show the higher longitudinal shear modulus. And it has been found that the theoretical and numerical predictions of the longitudinal shear modulus give a good agreement with the experimental data at lower fiber volume fraction. Both the distance and stress transfer between the fibers are discussed as the major determing factors.

• 한국진공학회:학술대회논문집
• /
• 한국진공학회 2010년도 제39회 하계학술대회 초록집
• /
• pp.291-291
• /
• 2010

Electron-beam lithography (EBL) process is a versatile tool for a fabrication of nanostructures, nano-gap electrodes or molecular arrays and its application to nano-device. However, it is not appropriate for the fabrication of sub-5 nm features and high-aspect-ratio nanostructures due to the limitation of EBL resolution. In this study, the precision assembly and alignment of DNA molecule was demonstrated using sub-5 nm nanostructures formed by a combination of conventional electron-beam lithography (EBL) and plasma ashing processes. The ma-N2401 (EBL-negative tone resist) nanostructures were patterned by EBL process at a dose of $200\;{\mu}C/cm2$ with 25 kV and then were ashed by a chemical dry etcher at microwave (${\mu}W$) power of 50 W. We confirmed that this method was useful for sub-5 nm patterning of high-aspect-ratio nanostructures. In addition, we also utilized the surface-patterning technique to create the molecular pattern comprised 3-(aminopropyl) triethoxysilane (APS) as adhesion layer and octadecyltrichlorosilane (OTS) as passivation layer. DNA-templated gold nanoparticle chain was attached only on the sub-5 nm APS region defined by the amine groups, but not on surface of the OTS region. We were able to obtain DNA molecules aligned selectively on a SiO2/Si substrate using atomic force microscopy (AFM).

• 조명전기설비학회논문지
• /
• 제19권4호
• /
• pp.47-54
• /
• 2005

어둡고 한정된 지하공간의 이미지의 개선은 지하개발 성공여부에 중요한 결정요소가 되고 있다. 주거단지 지하주차장의 조명환경은 지금까지 양적 위주의 설계와 운영이 이루어졌으나 이제는 지하주차장 공간의 질적 향상이 필요한 때이다. 이를 위해서 우선 고려해야 할 두 가지는, 첫째로 주차장에서 주로 사용되는 광원에 대한 이해이며, 둘째는 균제도의 향상이다. 특히 겨울철 외기의 영향에 의한 주차장 실내의 심각한 조도저하와 균제도의 유지를 위한 방안이 마련되어야 한다. 따라서 조명기구의 간격, 배열에 대한 변화가 필요하며, 운용에 있어서는 시간에 따른 일률적인 기존의 제어방법에서 벗어나 이용패턴을 고려한 방식으로의 전환이 요구된다.

• 가정과삶의질연구
• /
• 제20권4호
• /
• pp.53-60
• /
• 2002

The purpose of this study was to comprehend the cognition of Korean tradition and the required basic educational contents among interior architects. The survey had been made 277 designers and the major findings of this study are as follows. First. It is revealed that only a half of interior architect have been taught about Korean tradition in university and their level of knowledge is entry level. Therefore it is found that the education in university on the Korean tradition was not sufficient enough Second, it is believed that one ideal way of expressing Korean tradition is re-interpreting traditional motive with modern views and another way is to express abstractly about Korean traditional space arrangement, composition and space concept. It is found that substantial knowledge and information is required to express Korean tradition effectively. Third. it is found that a lot of interior architect has faced difficulties in carrying out projects because of not having sufficient knowledge related to Korean tradition. Therefore it is recommended to educate basic theory about Korean tradition first and then reinforce the program by including field trip In university curriculum. Fourth. it is necessary to re-educate to current Interior architect because of lacking knowledge about Korean tradition. The recommended area in priority order is traditional Interior space, traditional architecture, traditional color, traditional pattern and traditional furniture

• 패션비즈니스
• /
• 제25권4호
• /
• pp.14-35
• /
• 2021

This study compares and analyzes the designs of Burberry creative directors, Christopher Bailey and Riccardo Tisci. For this purpose, 322 photographs (176 Christopher Bailey and 146 Riccardo Tisci) were collected and the data analysis criteria were classified into color, shape, material, decoration, item, and fashion style. With respect to the data analysis method, statistical analysis and content analysis were combined. First, the design characteristics of Christopher Bailey top and bottom combined bright tone, tone-in-tone color scheme, H-line, heterogeneous material combination, and smart casual appeared very frequently. Second, the design characteristics of Riccardo Tisci top and bottom combined were monotone, tone-on-tone color scheme, H-line, heterogeneous material combinations, and street culture. Third, the design differences between creative directors were significantly different in color, tone, color arrangement, pattern, material type, material combination, detail, top and bottom items, and fashion style. Burberry men's wear maintains Burberry's traditional design identity with achromatic colors, beige-based colors, and beige checks. Christopher Bailey's design direction is characterized by modernity in a casual mood that emphasizes practicality. The design direction of Riccardo Tisci is characterized by a wide gap between images in a semi-formal style that emphasizes Burberry's tradition and a free-spirited casual style.

• 복식문화연구
• /
• 제23권6호
• /
• pp.987-1003
• /
• 2015

The purpose of this study is to supply available data for men's fashion design planning by analyzing the trend and design tendency of the preppy look in the domestic men's collection. In the men's collection of Seoul fashion week from 2011 S/S to 2015 S/S, 494 photos judged to be the preppy look by three design specialists were chosen in Seoul fashion week and style.com's web-site. Design analyses were compiled based on year, season, brands, item, color, material, and silhouette. The preppy look was found often in S/S season, three piece combinations were the most common, and "H", "I" silhouettes were also popular. Refined black and refreshing orange were used with traditional preppy colors like navy, beige, gray, and white. Contrast color arrangement and neutral, moderate tones were seen repeatedly. Two-thirds of fabrics were pattern-less with clean, bulky, and soft textures. Coordinating accessories like hats, backpacks, books, headsets were used frequently. Among the various preppy fashion types, there were 'traditional preppy' faithful to tradition, 'sophisticated preppy' with refined semi-formal look, 'sportive preppy' with active sports sense, and 'natural preppy' with natural and comfortable senses. In a contemporary preppy look, traditional and practical senses are combined with casual and sportive pieces. This study can provide the data for design planning, interpreting, and applying the fashion themes along with contemporary sensibilities since the preppy look is based on cultural history.

• 한국수산과학회지
• /
• 제33권3호
• /
• pp.171-175
• /
• 2000

1998년 7월 섬진강 하구에서 채집한 참재첩, Corbicular leana를 대상으로 전자현미경적 연구를 수행하였다. 정원세포는 웅성생식세포 가운데서 가장 크고, 제1차 정모세와와 제2차 정모세포는 크기와 핵내 이형염색질의 응축정도로서 구분이 가능하였다. 정세포에서 정자로의 변태과정에서 핵내의 물질은 섬유상 다발을 형성한 이후 변태완료 후에는 섬유상 다발은 사라졌다. 성숙정자는 채찍모양으로 전형적인 primitive type이었으며, 첨체부는 $3\;{\mu}m$, 핵질부는 $9\;{\mu}m$ 전후 였다. 핵질부 후반부는 중심체쪽으로 융기되어 있고, 중편에는 2개의 중심체와 4개의 신장된 미토콘드리아를 가지고 있었다. 꼬리는 전형적인 9+2구조를 가졌다.

• 한국항만학회지
• /
• 제12권1호
• /
• pp.95-104
• /
• 1998

Water pollution in a semi-enclosed sea area such as a bay due to stagnancy of water has been a serious water environmental problem. Recently, some kinds of new methods to activate the tidal exchange between an inner bay and an outer sea area by control of a tidal residual current have been proposed. However, these methods have several problems, that is, I). deterioration in a natural view due to building of huge structures, II). increase of risk of navigation in case of a submerged structure, III). limition of sea area where a tidal current can be controlled and IV). difficulty in removing those structures in case of occurrence of an unexpected impact on water environment. In this paper, a new method is proposed, which can solve all the above problems, to purify water quality in a semi-enclosed bay by creation and control of a pattern of a tidal residual current. The tidal residual current is controlled by unsymmetric structures, which change the properties of resistance according to the direction of flow, arranged on the sea bottom. In this study, several numerical and hydraulic experiments of tidal current and particle-tracking for various arrangements of bottom roughness in a semi-enclosed model bay were carried out. As a result of experiments, it becomes clear that it is possible to generate a new tidal residual current and to activate a tidal exchange by only operation of bottom roughness arrangement.

• 대한전자공학회논문지
• /
• 제22권2호
• /
• pp.1-5
• /
• 1985

본 연구에서는 단일모드 광섬유에서의 온도에 의한 위상변조 현상을 분석하고 단일모드 광섬유 간섭계를 이용한 온도센서를 설계. 제작하여 그 온도특성을 조사하였다. 설계한 fiber-optic온도센서는 Mach-Zehnder 간섭계를 이용한 위상감지형 고감도 센서로서 온도변화는 간섭무의의 이동으로써 측정되어졌다. 간섭계에 의한 측정에서 중요한 문제중의 하나는 온도분만 아니라 모든 피측정 물리량의 변화방향에 따른 간섭무의의 이동갯수와 이동방향을 동시에 측정하는 것이다. 이를 위해 다중모드 광섬유를 이용한 배열 검출기를 제작하여 매우 간편하게 간섭무늬의 이동갯수와 이동방향을 측정하였다.