• Journal of the Korean Society of Clothing and Textiles
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• v.30 no.2 s.150
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• pp.255-265
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• 2006

The purpose of this study was to examine the dyeing properties of four kinds of composite yams that were twisted in different processes. The composite yarns consist of acetate and functional polyester in ratio of 70 : 30. The composite yams were dyed at 100$^{circ}C$ and 125$^{circ}C$ using three types of dyes, disperse dyes for acetate fiber, PET fiber and PET-acetate blended fiber, in the three primary colors. The exhaustion($\%$) and K/S value were observed for each case. Also the effects of four different twisting processes to dyeing properties and physical properties were examined. Regardless of twisting methods, the composite yarns that were dyed at 125$^{circ}C$ had higher exhaustion($\%$) than those were dyed at 100$^{circ}C$ with all three types of dyes; However, tendency of the K/S value after reduction cleaning process was measured at 100$^{circ}C$ and the value measured 125$^{circ}C$ had a great difference with disperse dyes for acetate and dyes for PET. The difference of the K/S values of composite yarns, when dyed at 100$^{circ}C$ and 125$^{circ}C$ with disperse dyes for PET-acetate blended fiber, was almost negligible. According to twisting methods K/S values were in the following order: AP1 > AP3 > AP4> AP2. This means that AP1, treated at 220$^{circ}C$, had the highest K/S value and K/S value becomes higher as the yam is higher twisted and becomes lower as lower twisted. On the other hand, the dry shrinkage and wet shrinkage showed low shrinkage rate when the twist was high and steam setting temperature was high.

• Applied Chemistry for Engineering
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• v.24 no.3
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• pp.231-238
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• 2013

In this study, the $TiO_2$ nano spheres were synthesized by Sol-gel method to give an excellent UV-blocking effect and increase waste adsorption. The pH value was adjusted to obtain a superb UV-blocking effect and adsorption capacity due to the high surface area which is the characteristics of porosity. Base treated $TiO_2$ showed outstanding characteristics. The adsorption of gycerine onto the $TiO_2$ sample using TGA resulted in a high surface area of 1.16 mg/mg. This also showed a high reflectance in the UV-A region. In order to find the optimum dispersion, inorganic powder particles were maintained their sizes as 180 nm for about 6 months. The size of particles were measured using ester oil and silicon oil. Overall, the results reveal that $TiO_2$ has an excellent capability sunscreen in the UV-A region and skin waste adsorption.

• Journal of Science Education
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• v.38 no.2
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• pp.231-243
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• 2014

The purpose of this study was to compare the duplication problem of achievement standards between science and other subjects in the 2009 Revised National Curriculum and to search for solutions and implications for this problem. From the results of this study, we found that the achievement standards of practical arts, social studies, physical education and ethics were overlapped with science's ones. The duplication of content elements for 'our body and health', 'living things and environment', 'biodiversity' and 'natural disaster' categories was not high, that is, their achievement standards were relatively well-differentiated and reflected the intrinsic characteristic of each subject under common topics. But, in case of 'reproduction and development' and 'world of technology' categories, the problem of duplications was serious. In order to cope with this problem, we need to consider solutions such as merging or integrating the achievement standards of related subjects. The relevant experts should conduct in-depth discussion and negotiation, and develop achievement standards more consistent with the identity of each subject.

• Journal of the Korean Society of Radiology
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• v.9 no.7
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• pp.495-500
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• 2015

Health care privatization will have a very significant impact on the quality of medical service and income redistribution and risk diversification. This study was conducted to improve the situation without too much insistence that one did not understand the essence rife about the privatization of health care. In this study, grasp the implications of the current health care debate to be privatized, and dealing with the claims accordingly. Seeks to help establish an objective perspective, looking at the pros and cons at the same time claims for medical privatization policy. The Health and diversification through the capitalist market access as part of the transition process is being overlooked as a new growth engine industries. But health care is constrained to follow the growth of universal access and how to deal with life because it is practical conduct of the person. In addition to services that are not only for the benefit of the profit or government institutions.

• The Journal of Korean Society for School & Community Health Education
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• v.21 no.3
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• pp.21-34
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• 2020

배경 및 목적: 본 연구는 학교 내 응급상황(천식 위기, 알레르기 반응, 저혈당 위기, 발작, 심폐정지, 출혈/골절, 머리/목 상해, 열성질환, 중독, 질식)에 대한 행정 차원과 물품구비 차원에서의 준비 실태, 그리고 응급처치 수행자신감을 파악하는데 목적이 있다. 방법: 단면조사연구로 274명의 보건교사를 대상으로 하였으며, 자가보고형 조사지를 이용하여 대상자와 학교의 일반적 특성, 학교 내 응급상황에 대한 행정·물품 준비 실태, 그리고, 응급처치 수행자신감 등 3개 영역의 자료를 수집하였다. 자료수집은 2018년 2월 1일부터 2018년 7월 31일까지 실시하였고, 자료분석은 기술통계, t-검정과 분산분석을 이용하였다. 결과: 대부분의 학교에서 응급상황 관리계획이 있었으나, 응급상황별로 천식 위기는 46.7%, 알레르기 반응은 58.4%에서만 관리계획을 갖추고 있었다. 산소, 혈당측정기, 자동제세동기, 경추고정장치 등은 85% 이상의 학교에서 보유하고 있었으나, 기관확장제 흡입기, 에피네프린 주사제, 흡인기 등은 거의 갖추고 있지 않았다. 응급상황 수행자신감은 5점 만점에 2.67점 (발작관리) 에서 3.55점 (심폐정지관리)이었으며, 일부 응급상황에 대해서 의료기관 근무경력이 증가함에 따라 수행자신감이 증가하였다. 결론: 대부분의 학교에서 응급관리계획을 수립하고 있었으나, 응급상황별 관리계획을 수립한 경우는 반 정도에 불과하였다. 보건교사의 학교 내 응급상황에 대한 응급처치 수행자신감은 전체적으로 낮게 나타남에 따라, 이들의 역량강화를 위한 체계적인 교육과 멘토링 프로그램이 요구된다.

• Fire Science and Engineering
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• v.25 no.3
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• pp.85-90
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• 2011

This study of the vestibule of pressurizing smoke control system installed in domestic high-rise buildings for evacuation in case of fire, when the door is open to forming characteristics of the air flow was analyzed using fire dynamics simulator and analyzed of variance. Vestibule which is compartment of the design condition, air flow in the exhaust damper was formed severe turbulence confirming preceding research. The door position is in the range of formed vortex, unsteady flow of air occurs at the point that the door could be confirmed. According to the NFSC 501A, door to symmetrically separate the average of 10 points or more as measured from the average of wind speed to do is based. Under these conditions, it is difficult to measure the characteristics of the upper air flow of upper points. so measuring points are subdivided by more than 64 points method presented in TAB because severe deviation of wind speed.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.1
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• pp.283-290
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• 2016

As the development of recent science and technology, high-performance computing resources is needed to solve complex problems. To reach these requirements, it has been actively studied about grid computing that consist of a huge system which bind a heterogeneous high performance computing resources into on which are geographically dispersed. However, The current research situation which are the process to obtain the best results in the limited resources and the scheduling policy to accurately predict the total execution time of the real-time task are very poor. In this paper, in order to overcome these problems, we suggested a grid computing-based risk management system which derived from the system structure and the process for improving the efficiency of the system, grid computing-based working methodology, risk policy module which can manage efficiently the problem of the work of resources(Agent), scheduling technique and allocation method which can re-allocate the resource allocation and the resources in problem, and monitoring which can manage resources(Agent).

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.38 no.6
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• pp.703-711
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• 2001

In this paper, we propose efficient multispectral image compression using variable block size vector quantization (VQ). In wavelet domain, we perform the variable block size VQ to remove intraband redundancy for a reference band image that has the lowest spatial variance and the best correlation with other band. And in wavelet domain, we perform the classified interband prediction to remove interband redundancy for the remaining bands. Then error wavelet coefficients between original image and predicted image are residual variable block size vector quantized to reduce prediction error. Experiments on remotely sensed satellite image show that coding efficiency of the proposed method is better than that of the conventional method.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.46 no.12
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• pp.102-107
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• 2009

As technology gets developed, medical equipments are also modernized and leading-edge systems, such as PACS become popular. Many scientists noticed importance of medical image processing technology. Technique of region segmentation is the first step of digital medical image processing. Segmentation technique helps doctors to find out abnormal symptoms early, such as tumors, edema, and necrotic tissue, and helps to diagnoses correctly. Segmentation of white matter, gray matter and CSF of a brain image is very crucial part. However, the segmentation is not easy due to ambiguous boundaries and inhomogeneous physical characteristics. The rate of incorrect segmentation is high because of these difficulties. Fuzzy-based segmentation algorithms are robust to even ambiguous boundaries. In this paper a modified Fuzzy-based segmentation algorithm is proposed to handle the noise of MR scanners. A proposed algorithm requires minimal computations of mean and variance of neighbor pixels to adjust a new neighbor list. With the addition of minimal compuation, the modified FCM(mFCM) lowers the rate of incorrect clustering below 30% approximately compared the traditional FCM.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.48 no.1
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• pp.101-107
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• 2011

The background noises and distortions by channel are major factors that disturb the practical use of speech recognition. Usually, noise reduce the performance of speech recognition system DSR(Distributed Speech Recognition) based speech recognition also bas difficulty of improving performance for this reason. Therefore, to improve DSR-based speech recognition under noisy environment, this paper proposes a method which detects accurate speech region to extract accurate features. The proposed method distinguish speech and noise by using entropy and detection of spectral energy of speech. The speech detection by the spectral energy of speech shows good performance under relatively high SNR(SNR 15dB). But when the noise environment varies, the threshold between speech and noise also varies, and speech detection performance reduces under low SNR(SNR 0dB) environment. The proposed method uses the spectral entropy and harmonics of speech for better speech detection. Also, the performance of AFE is increased by precise speech detections. According to the result of experiment, the proposed method shows better recognition performance under noise environment.