• 한국의류학회지
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• 제9권2호
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• pp.75-84
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• 1985

In order to improve dyeing and finishing technology of thin cloth of microfiber(super-fine fiber), the degrees of deep dyeing method, the light fastness, and the washing fastness were investiagted. 1. The thin cloth made of microfiber, $0.15^d\~0.2^d$, was conjugated type and the dyeing degree was lower at 5 to $10\%$ than that of cloth made of common fiber. The cloth of excellent dyeing fastness, light fastness, was developed by increasing the concentration of dye of high quality up to $5\~10\%$. 2. Because refractory rate of microfiber of $0.2^d$ was lower than that of $0.01^d$, the surface refractory rate of $0.2^d$ was lower than that of $0.01^d$ fiber. Therefore the surface of micro-fiber, $0.2^d$, was more rougher than that of $0.01^d$ and it belongs to separate type. 3. The higher degree of dyeing was increased by using dye of microparticle. Also the degree of textile printing was increased by adding urea solution ($20\%$) and glycerine diethylene glycol. 4. Light fastness was very excellent, marked 5 grade. However, washing fastness was 2$\~$3 grade. After dyeing, we could improve to 4 grade, through hot water washing including some organic chlorine solvent. 5. Super microfiber of $0.01^d$ will not be dyed by present dye and dyeing equipment, because right reflection light rate(white light) of fiber surface was too high and the more refraction rate higher the more surface refraction rate will be increased.

• Journal of Hospice and Palliative Care
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• 제20권2호
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• pp.122-130
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• 2017

목적: 본 연구는 중환자실 간호사가 DNR 환자 임종을 경험하면서 수용하는 개인의 주관적 경험의미와 그 구조를 기술하는 것이다. 방법: 대상자는 종합병원 중환자실 간호사 8명이었으며, 심층면담을 통한 질적 연구로 현상학적 연구방법을 이용하였다. 결과: 중환자실 간호사들의 DNR 환자 임종경험은 '정답이 없는 죽음의 양면성, 죽음과 일의 경계에서 경험하는 딜레마', '가족이 안고 있는 죽음의 무게 감당하기', 상실로 얻은 삶에 대한 성찰',의 4가지 주제모음으로 나타났다. 결론: DNR에 대한 판단기준과 DNR 결정 절차에 대한 상세한 규정, DNR 환자 간호윤리 지침 및 교육이 필요하고, DNR 환자 가족에 대한 중재 프로그램 개발이 요구된다.

• 센서학회지
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• 제29권1호
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• pp.27-32
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• 2020

This study proposes a pixel-patterning method for organic light-emitting diodes (OLEDs) based on thermal transfer. An infrared lamp was introduced as a heat source, and glass type donor element, which absorbs infrared and generates heat and then transfers the organic layer to the substrate, was designed to selectively sublimate the organic material. A 200 nm-thick layer of molybdenum (Mo) was used as the lightto-heat conversion (LTHC) layer, and a 300 nm-thick layer of patterned silicon dioxide (SiO₂), featuring a low heat-transfer coefficient, was formed on top of the LTHC layer to selectively block heat transfer. To prevent the thermal oxidation and diffusion of the LTHC material, a 100 nm-thick layer of silicon nitride (SiN_x) was coated on the material. The fabricated donor glass exhibited appropriate temperature-increment property until 249 ℃, which is enough to evaporate the organic materials. The alpha-step thickness profiler and X-ray reflection (XRR) analysis revealed that the thickness of the transferred film decreased with increase in film density. In the patterning test, we achieved a 100 ㎛-long line and dot pattern with a high transfer accuracy and a mean deviation of ± 4.49 ㎛. By using the thermal-transfer process, we also fabricated a red phosphorescent device to confirm that the emissive layer was transferred well without the separation of the host and the dopant owing to a difference in their evaporation temperatures. Consequently, its efficiency suffered a minor decline owing to the oxidation of the material caused by the poor vacuum pressure of the process chamber; however, it exhibited an identical color property.

• 감성과학
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• 제6권3호
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• pp.29-43
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• 2003

본 연구에서는 남성과 여성에 있어서 정서적 자극에 대한 기억이 다른지를 알아보고자 하였다. 또한 제시되는 자극의 기억을 측정할 것이라는 기억지시문을 주고, 또한 자극제시 후 곧바로 자유회상의 방법으로 기억을 측정함으로써 정서적 자극으로 유발된 정서의 표현을 조절할 필요성을 가능한 최소화시켰다. 그리고 남성과 여성의 정서적 자극과 중성적 자극에 대한 기억을 측정함으로써 선행사건초점 정서조절 과정에 의해 남성들의 정서적 자극에 대한 기억이 손상됨을 밝히고자 하였다. 전체적으로 여성들이 남성들보다 제시된 자극에 대하여 더 많이 기억하고 있었으며, 특히 중성적 자극보다 정서적 자극에 대해 남성들보다 더 많은 내용을 회상하였다. 회상내용을 중심적 요소에 대한 기억과 지엽적 요소에 대한 기억으로 나누어 남녀 차이를 분석해본 결과, 여성들은 정서적 자극의 중심적 요소에 대하여 중성적 자극보다 더 많이 기억하였으나 남성들은 정서적 자극과 중성적 자극에 대한 중심적 요소에 대한 기억차이가 나타나지 않았다.

• 대한수학교육학회지:학교수학
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• 제13권3호
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• pp.385-404
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• 2011

반성적 교수는 최근 교사의 수업 전문성 신장측면에서 다방면으로 연구되고 있다. 이와 관련하여 본 연구에서는 초등학교 수학과의 반성적 교수 과정에서 나타나는 초임교사와 경력교사의 사고를 사례 연구의 방법을 사용하여 조사하였다. 자료 분석 결과 반성적 교수 초기에는 초임교사의 경우 수업 중 오류 발견의 빈도가 적었고 자신감 부족으로 인해 반성의 결과를 적극적으로 수업에 적용하지 못한 것으로 밝혀졌다. 이에 비해 경력교사는 초임교사보다 수업 중 오류 발견의 빈도가 높았으며 자신감과 확신으로 인해 반성의 빈도가 높지 않았다. 두 교사는 반성적 교수에의 참여가 증대할수록 공통적으로 교과 전문가 조언의 필요성을 느끼게 되었으며, 교사 중심의 수업보다는 점차적으로 학생들과의 상호작용을 중시하는 방향으로 수업을 전개하였다. 아울러, 초임교사는 학생들과의 상호작용 빈도가 경력교사에 비하여 상대적으로 높아지게 되었고, 경력교사는 반성의 빈도가 높아지게 되었다. 이러한 결과를 토대로 본 논문은 추후 초임교사와 경력교사 간의 상호 협력적 수업 반성 및 수업 개선을 위한 각종 시사점들을 제시하고 있다.

• 한국도로학회논문집
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• 제14권5호
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• pp.31-45
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• 2012

PURPOSES: In Korea, rapid maintenance of distressed concrete pavement is required to prevent traffic jam of the highway. Asphalt concrete overlay has been used as a general maintenance method of construction for aged concrete pavement. AC overlay on existing concrete pavements experience various early distresses such as reflection crack, pothole and rutting, due to different physical characteristics between asphalt overlay and existing concrete pavement. Bonded concrete overlay(BCO) is a good alternative since it has advantages that can reduce various distresses during the service life since overlay material has similar properties with existing concrete pavements. Recently, BCO which uses the ultra rapid harding cement has been applied for maintenance of highway. BCO has advantage of structural performance since it does monolithic behave with existing pavement. Therefore, it is important to have a suitable bond strength criteria for securing performance of BCO. Bond strength criteria should be larger than normal tensile stress and horizontal shear stress occurred by traffic and environmental loading at bond interface. Normal tensile stress and horizontal shear stress need to estimated for the establishment of practical bond strength criteria. METHODS: This study aimed to estimate the bond stresses at the interface of BCO using the three dimensional finite element analysis. RESULTS: As a result of this study, major failure mode and maximum bond stress are evaluated through the analysis of normal tensile stress and horizontal shear stress for various traffic and environmental load conditions. CONCLUSIONS: It was known that normal tensile stresses are dominated by environmental loading, and, horizontal shear stresses are dominated by traffic loading. In addition, bond failure occurred by both of normal tensile stresses and horizontal shear stresses; however, normal tensile stresses are predominated over horizontal shear stresses.

• 한국소음진동공학회논문집
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• 제23권3호
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• pp.249-257
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• 2013

This study newly presents a synthetic phase tuning technique to suppress the unwanted torsional mode while enhancing the desired torsional mode in a pipe. Specifically, we aim at the enhancement of the first torsional mode and the suppression of the undesired, second torsional mode. Earlier efforts were to enhance the desired wave mode only in the hope that the enhancement results in the suppression of the unwanted wave mode. Unlike these efforts, the suggested technique makes the complete cancellation of the unwanted wave mode but it is shown to enhance the desired first mode for torsional wave problems. In the present study, the synthetic phase tuning is developed for the cancellation of the unwanted wave mode, meaning that the number of necessary experimental equipments is reduced. Simulation and experiment were carried out to check the effectiveness of the proposed method. As an application of the suggested technique, we investigated the reflection and mode conversion characteristics of the first torsional mode according to the step thickness variation in a stepped pipe.

• 소성∙가공
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• 제14권3호
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• pp.282-290
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• 2005

Nowadays, TFT-LCD is widely used as display unit of many digital devices. And, the backlight unit(BLU) is used as a light source of TFT-LCD module. In the backlight unit, the most important component is a light guide, which guides the input light to the TFT-LCD module uniformly. Recently, many researchers have focused on improving the efficiency of BLU by changing the design and structure of a light guide. In the present paper, a series of simulation was performed to find the optimal luminance distribution of emanated light from the given geometry as the first step. From the results of simulations for the light guide with given V-groove pattern, the emanated light from it is mostly affected by the groove angle. In the case of acute angle, about 74 degrees was found as optimal angle to satisfy the restrictions of angular luminance distribution, FWHM, the maximum luminance, etc. However, as far as the average luminance value was concerned, the case of 120 degrees(abtuse angle) was found to be the best while prism films were added to the BLU. As a next step the light guide samples of 74 and 120 degrees were manufactured by DSF method, which was recently proposed by the authors. Of course, most of design parameters were chosen by the aid of simulation results. Finally, the results of average luminance values were compared between the simulation and DSF molded samples.

• 천문학논총
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• 제20권1호
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• pp.151-161
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• 2005

The reimaging optics of the KASINICS (KASI Near Infrared Camera System) includes many transparent components like an entrance window, band-pass filters, and blocking filters. As observational targets or in-field background objects, bright stars may cause optical ghosts that can significantly degrade the system performance of the KASINICS. We estimated analytically the relative brightness of ghost components with respect to a point source and examined the effects of tilting optical components as a method of suppressing ghosts. We also performed numerical ray tracings including all the optical components and found the results are consistent with those of the analytic estimations. We conclude that the KASINICS will not suffer from significant ghost effects with appropriate anti-reflection coatings and fittings for the optical components.

• 대한전자공학회논문지TC
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• 제41권8호
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• pp.93-97
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• 2004

전력선 통신의 매체인 전력선은 60Hz 전력 공급을 위해 설계되었기 때문에 고속 전력선 통신을 위한 1MHz∼30MHz 대역에서는 전력선은 전기적으로 많은 다른 특징을 갖는다. 따라서 고속 전력선 통신을 위해서는 전력선의 고주파 특성-감쇄 지연, 임피던스-등이 자세하게 분석되고 연구되어야 한다. 본 논문에서는 고속 전력선 통신용 1MHz∼30MHz 주파수 대역 옥내저압 전력선 (220V) 임피던스를 측정하였다. 벡터 회로망 분석기와 저압 전력선 결합 장치(coupling unit)를 이용하여 임피던스를 측정하였다. 결합 장치를 T형 등가회로로 바꾸어, 전체 회로에서 얻은 산란계수를 이용하여 저압 전력선 임피던스를 구했다. 제안된 방법으로 표준 한국형 저층 연립 아파트에 대한 임피던스를 측정하고, 그 특성을 분석하였다. 또한 임피던스 정합을 위하여 평균 임피던스를 구하였고, 측정결과 평균 임피던스는 약 100Ω이었다.