• 한국의상디자인학회지
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• 제4권3호
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• pp.9-15
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• 2002

Compared with synthetic dyes, natural dyes have inferior colorfastness as a result of the exposure of the material to any environment that may be encountered during the processing, testing, storage, display or use of the dyed materials. Especially, colors on fabrics fade excessively after washing. Therefore, it is problem to infer the historic textiles with natural-dyed fabrics. The object of this study is to analyse the factors affected to colorfastness and color change during washing. In experimental, fifteen natural dyes were dyed by the Korean traditional dyeing methods onto natural fiber fabrics: cotton, silk, ramie, and flex. Total 49 dyed fabrics in combination with dyes and fibers were used for the specimen. The Launder-Ometer was used for evaluating the effects of exposure to repetitive washing from 1 to 20 washing cycles (KS K 0430). Color difference(ΔE) in the CIEL＊A＊B＊ color-order system were determined by spectrophotometer at 100 bserver. Washing caused significant changes in the color of natural-dyed fabrics. The degree and nature of color changes on the fabrics were dependent on the combination of fiber and the dye type used. The groups of violet(Lithospermum erythrorhizon Sieb.et Zucc) and black color(Ailanthus altissima Swingle, Phus trichocarpa Miq) yielded excellent colorfastness to repetitive washing. The group of indigo blue color(Polygonum tinctorium Lour.) was also very resistant to color change in washing except silk. Whereas the dye groups of Red, Yellow, Orange, Brown colors indicated greatest changes in color, particularly Carthamus tinctorius L.

• 복식
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• 제55권3호
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• pp.59-68
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• 2005

The purpose of this study is to examine the changing process of hairstyle and the fashion trend of hairstyle in the environment where it is possible to change one's hairstyle easily arid .display oneself in various ways and the interest in hairstyle is increasing. To examine the change of real university girls' hairstyle, I selected commencement pictures of Chungnam University as material. As a method of analysis, I compared and anaylized each time period's fashion trend and the change of real university girls' hairstyle after abstracting formative element of hairstyle on the basis of preceding studies on hairstyle and measuring frequency by element of each time period. Analyzing university girls' pictures showed that many of them had curls when various perms appeared and majority of them had straight style when straight perm and magic iron appeared. When products of hairstyling were on the market and globalization changed sense of beauty, it was highly popular to set up forelock with hairstyling products. In a pluralistic social environment, desire for color aspect other than formative aspect increased. As various hairdyes were developed, hairdyeing was generalized and university girls came to accept it as natural. Fashion trend of each time period and university girls' hairstyle showed generally similar trend. In mid 1980s, curl was popular, and, in late 1980s, straight style and setting up forelock with hairstyling products were on the increase. In early 1990s, the emergence of coating perm which combined perm and hairdyeing increased hairdyeing. In late 1990s, straight style was popular and layers expressed naturalness. In early 2000s, university girls showed off their long hair in various ways and hairdyeing drastically increased.

• 한국실내디자인학회논문집
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• 제22권3호
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• pp.108-116
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• 2013

This study has the purpose to review the way of experience element and property of space design appearing in vocational experience space and accumulate basic study material for children's vocational experience space and build systematic and specialized modules. Analysing the marketing elements of experience space through pilot research to arrange frame of analysis, and in a determined range, experimental marketing's property appearing in children's vocational experience center is analysed. This researcher analysed experimental displaying space's function of recognition, emotional, behavior, sense marketing and experimental marketing induced from pilot research on space design expressive elements of experimental marketing when it is applied to spaces through the frame of analysis with the combination of total 8 kind's experience display space function such as investigative, conceptional, aesthetic, entertaining, logical, relative, participating, and comprehensive experience based on 5 vocational experience spaces located in Seoul and Gyeonggi, opened after 2010, being operated at present with more than 500 pyeong (about 1,650 square meter) and targeted for children, after this researcher visited the site directly to make check list with the frame of analysis together with the staff and administrator in charge of vocational experience education. As a conclusion, vocational experience center is a space of edutainment helping children experience various profession more easily to find their interest and to bring up their dream. By analysing current vocational experience center through the element called experimental marketing, current status of vocational experience center could be known. the experience itself in vocational experience center becomes a merchandise. Instead of mere experience, so as to get professional experience and new information, new experiences should be provided by incessant variation and development. This study is to build basic research data for children's vocational experience space, however not only drawing specialty of vocational experience center through the connection of enterprises based on the contents arranged above but also systematic and specialized modules are expected to be built in next researches.

• 한국실내디자인학회논문집
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• 제26권5호
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• pp.25-33
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• 2017

The home interior market has been expanding due to the continuing increase of single-person households, the craze for DIY interior design, the increasing demands for old-house renovation and the customer needs for good housing conditions. Now the building materials companies are scrambling for the whole interior market share. The heretofore companies have focused only on the single items, but now they are promoting the comprehensive interior products as total interior brands. Besides, they use their own showrooms to share their brand culture experience and have communication with their customers. As for the show rooms, they have got to represent the identities of the building materials brands. And to present them effectively, it needs to meet the customer needs and emotions. In this connection, the object of this study is to clarify the definitions and the characteristics of the show rooms and the experience design through the literature research, analysis the space characteristics of the experience design in the show rooms of total interior brands, investigate their customer satisfaction and present the direction and the effective methods of the space design for the show rooms of the future. And the study result shows the experience design is the key factor to the high user satisfaction. Thus, the show rooms should provide the well-balanced experience with the adoption of a variety of experience design elements. Especially, the experience design elements are needed in the room to display the merchandise. Lastly, the show rooms are expected to increase constantly, so the study targeted at the specific area, Seoul should be expanded to other areas. And this study based on the customer survey alone have a limit to giving the concrete proposals. Therefore, the follow-up studies with the different methods such as one-to-one interview will be in demand.

• 한국기계가공학회지
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• 제16권2호
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• pp.44-49
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• 2017

In this study, the cutting conditions of moving speed, number of main axial revolutions, etc. are changed for the chrome molybdenum steel (SCM415) material and carbide ball end mill tool to study the changes for processing intensity in the cutting process. The results that confirm the intensity of the measured value of the specimen for SCM415 display the intensity with an average 1.0667 HrC. After the fact cutter, it was able to confirm the average intensity of 8.3815 HrC. In addition, the intensity value after image processing may determine the average intensity survey value of 5.8690 HrC and the different intensity values with image processing after face cutting are shown for an average of ${\pm}2.5125HrC$. The different value of intensity with the specimen and image processing is confirmed for an average of 4.8024 HrC. The results of comparing the intensity following the number of main axial revolutions and moving speed show that the intensity is highest for 3,000 rpm and F200, and lowest for 4,000 rpm and F200.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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• pp.319-319
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• 2013

Even though the fabrication methods of metal oxide based thin film capacitor have been well established such as RF sputtering, Sol-gel, metal organic chemical vapor deposition (MOCVD), ion beam assisted deposition (IBAD) and pulsed laser deposition (PLD), an applicable capacitor of printed circuit board (PCB) has not realized yet by these methods. Barium Strontium Titanate (BST) and other high-k ceramic oxides are important materials used in integrated passive devices, multi-chip modules (MCM), high-density interconnect, and chip-scale packaging. Thin film multi-layer technology is strongly demanded for having high capacitance (120 nF/$mm^2$). In this study, we suggest novel multi-layer thin film capacitor design and fabrication technology utilized by plasma assisted deposition and photolithography processes. Ba0.6Sr0.4TiO3 (BST) was used for the dielectric material since it has high dielectric constant and low dielectric loss. 5-layered BST and Pt thin films with multi-layer sandwich structures were formed on Pt/Ti/$SiO_2$/Si substrate by RF-magnetron sputtering and DC-sputtering. Pt electrodes and BST layers were patterned to reveal internal electrodes by photolithography. SiO2 passivation layer was deposited by plasma-enhanced chemical vapor deposition (PE-CVD). The passivation layer plays an important role to prevent short connection between the electrodes. It was patterned to create holes for the connection between internal electrodes and external electrodes by reactive-ion etching (RIE). External contact pads were formed by Pt electrodes. The microstructure and dielectric characteristics of the capacitors were investigated by scanning electron microscopy (SEM) and impedance analyzer, respectively. In conclusion, the 0402 sized thin film multi-layer capacitors have been demonstrated, which have capacitance of 10 nF. They are expected to be used for decoupling purpose and have been fabricated with high yield.

• 지식경영연구
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• 제17권2호
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• pp.27-50
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• 2016

Korean manufacturing industry have recently faced the catch-up of China in the mass commodity product, such as automotive, display, and smart phone in terms of market as well as technology. Accordingly, discussion on the importance of achieving catch-up in complex product systems (CoPS) has been increasing as a new innovation engine for the industry. In order to achieve successful catch-up of CoPS, we explored emerging technologies of CoPS, which are featured by the characteristics of radical novelty, relatively fast growth and self-sustaining, through the study of emerging technologies of gas turbine for power generation. We found that emerging technologies of the gas turbine are technologies for combustion nozzle and composition of electrical machine for increasing power efficiency, washing technology for particulate matter, cast and material processing technology for enhancing durability from fatigue, cooling technologies from extremely high temperature, interconnection operation technology between renewable energy and the gas turbine for flexibility in power generation, and big data technology for remote monitoring and diagnosis of the gas turbine. We also found that those emerging technologies resulted in technological progress of the gas turbine by converging with other conventional technologies in the gas turbine. It indicates that emerging technologies in CoPS can be appeared on various technological knowledge fields and have complementary relationship with conventional technologies for technology progress of CoPS. It also implies that latecomers need to pursue integrated learning that includes emerging technologies as well as conventional technologies rather than independent learning related to emerging technologies for successful catch-up of CoPS. Our findings provide an important initial theoretical ground for investigating the emerging technologies and their characteristics in CoPS as well as recognizing knowledge management strategy for successful catch-up of latecomers. Our findings also contribute to the policy development of the CoPS from the perspective of innovation strategy and knowledge management.

• 인지과학
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• 제25권3호
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• pp.189-210
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• 2014

안구운동추적 연구에서 지각폭의 크기를 파악하는 문제는 오랜 관심사였으며, 표기 체계나 읽기 기술의 발달 등이 지각폭의 크기에 영향을 미칠 수 있다고 알려져 있다. 본 연구는 우리글 읽기에서 대학생들의 지각폭을 알아본 최소영, 고성룡(2009)의 조건, 방법 및 문장 자극 등을 참조하여 중학생들의 지각폭을 측정하였다. 실험 1은 창의 크기를 3, 5, 7, 9, 11, 13, 15자로 조작하여 창이 없는 통제 조건과 수행을 비교하였다. 실험 결과, 읽기율 측정치에서는 9자 조건에서부터 대체로 실험 조건과 통제 조건 간의 차이가 있는 것으로 나타났으며, 고정 수에서 5자, 도약 거리에서 9자, 고정 시간에서 9자에서 통제 조건과의 차이가 확인되었다. 실험 2는 지각폭의 비대칭성에 근거하여 고정점을 기준으로 좌측의 지각폭 크기를 알아보기 위해 고정 좌측의 창 크기를 0, 1, 2, 3, 4자로 조작하였다. 실험 결과, 도약 거리를 제외한 읽기율, 고정 수, 고정 시간등의 모든 측정치에서 0자 조건에서만 통제 조건인 전체 조건과의 차이가 있는 것으로 나타났다. 위 결과를 바탕으로 본 연구는 중학생들의 지각폭을 여러 지표에서 두드러지는 왼쪽으로 1자, 오른쪽으로 4자로 추정하였다.

• 자원리싸이클링
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• 제12권6호
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• pp.8-12
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• 2003

본 논문에서는 최근 고품위 TV 및 고정세도 디스플레이용으로 화상의 정세도를 향상시키기 위해 수평주파수를 높이려는 움직임이 있어, 편향 요크용 페라이트 코아에는 고주파수 영역에 있어서도 코아로스가 낮은 재료가 요구되고 있는 실정이다. Mg-Zn 페라이트에 있어서 화학조성 및 프로세스가 미세구조에 미치는 영향에 착안하여 저온 소결화를 하였다. 저손실인 Mg-Zn계 Ferrite에 Cu를 첨가하였다. MgO, ZnO, $Fe_2$$O_3$, CuO를 선택한 후 조성비의 변화를 두며 CuO를 MgO로 치환하였다. 이 시료를 $980∼1350^{\circ}C$까지 3시간 소결하였다. 측정은 투자율, 전력손실, 수축율, 코아로스를 측정하였다. 시료의 수축율을 개시하는 온도는 $900^{\circ}C$부근이며 Cu치환에 따라 수축율이 증가하였으며, Cu 치환에 따라 소성온도가 약 $-50∼-75^{\circ}C$ 낮아졌다.

• Journal of the Optical Society of Korea
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• 제19권1호
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• pp.55-62
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• 2015

In this study we demonstrate ultrahigh-resolution spectral domain optical coherence tomography (UHR SD-OCT) with a linear-wavenumber (k) spectrometer, to accelerate signal processing and to display two-dimensional (2-D) images in real time. First, we performed a numerical simulation to find the optimal parameters for the linear-k spectrometer to achieve ultrahigh axial resolution, such as the number of grooves in a grating, the material for a dispersive prism, and the rotational angle between the grating and the dispersive prism. We found that a grating with 1200 grooves and an F2 equilateral prism at a rotational angle of $26.07^{\circ}$, in combination with a lens of focal length 85.1 mm, are suitable for UHR SD-OCT with the imaging depth range (limited by spectrometer resolution) set at 2.0 mm. As guided by the simulation results, we constructed the linear-k spectrometer needed to implement a UHR SD-OCT. The actual imaging depth range was measured to be approximately 2.1 mm, and axial resolution of $3.8{\mu}m$ in air was achieved, corresponding to $2.8{\mu}m$ in tissue (n = 1.35). The sensitivity was -91 dB with -10 dB roll-off at 1.5 mm depth. We demonstrated a 128.2 fps acquisition rate for OCT images with 800 lines/frame, by taking advantage of NVIDIA's compute unified device architecture (CUDA) technology, which allowed for real-time signal processing compatible with the speed of the spectrometer's data acquisition.