• 한국산학기술학회논문지
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• 제21권9호
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• pp.310-320
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• 2020

방탄소년단(BTS)은 전 세계 주류 음악 시장에서 한국의 대중음악을 선도하는 그룹으로 자리매김하고 있으며, BTS가 선보이는 다채로운 패션 스타일은 해외 매체나 대중들의 쇼셜 네트워크에 집중 조명될 정도로 큰 관심을 받고 있다. 본 연구는 BTS의 패션 스타일의 분석을 토대로 그들의 패션 경향을 파악하는데 목적이 있다. 연구방법 및 범위는 BTS 및 BTS의 패션이 미치는 영향력에 관련된 이론적 연구와 함께 최근 5년간 방탄소년단의 이미지 자료를 토대로 한 내용 분석 연구를 병행하였다. 본 연구의 결과는 다음과 같다. 첫째, 직선적인 실루엣이 강조된 슈트, 무채색의 활용, 간소화된 장식을 통하여 클래식하면서도 모던한 스타일을 추구하는 것으로 나타났다. 둘째, 둥근 어깨선이 강조된 봄버 재킷, 톤 다운된 스키니 진, 후드 티셔츠, 레터링 패턴, 비비드한 색상을 매치하여 자유분방하고 편안한 감성의 캐주얼 스타일을 선호하고 있는 것으로 나타났다. 셋째, 슬리브리스의 베스킷볼 셔츠, 라운드 네크라인의 베이스볼 셔츠와 반바지, 트레이닝팬츠, 레터링 패턴이 강조된 오버핏 맨투맨을 활용하여 역동적이고 활동적인 스포티한 스타일을 추구하는 것으로 나타났다.

• 한국화재소방학회논문지
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• 제29권4호
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• pp.57-60
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• 2015

화재 시 발생하는 독성 가스인 CO, HCl, HCN, $SO_2$를 방독면에 의해 제거하는 효율은 화재로 인한 인명구조의 핵심 요소이다. 머리와 목끈이 없는 탄력있는 방독면은 전방을 주시할 수 있는 창, 탄력후드, 가스정화기와 공기 환풍구로 되어 있어서 화재 시 빠르고 쉽게 착용할 수 있다. 이 연구에서는 이러한 방독면의 CO, HCl, HCN, $SO_2$ 제거 효율에 대한 연구를 진행하였다. 실험결과 CO 제거 효율은 최초 농도가 2505.0 ppm인 경우 3.5분 후에 99.99%였고, 8.5분 후에는 99.98%로 나타났다. 8.5분 후에는 CO 농도가 급격히 증가하는 특성을 보였다. HCl, HCN, $SO_2$에 대해서는 최초 농도가 각각 1003.0, 399.0, 100.3 ppm인 경우 20분 동안 제거 효율이 100%로 나타났다.

• 한국문헌정보학회지
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• 제51권3호
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• pp.83-108
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• 2017

도서관은 독자에게 독서정보를 제공하여야 할 의무와 책임이 있는 대표적 기관이며, 사서는 독자에게 도서에 관한 정보를 제공하기 위하여 아낌없는 상담과 조언을 할 수 있어야 한다. 독자들의 그림책에 관심이 높아지면서 도서관과 사서는 훌륭한 그림책은 어떤 것인지? 유사한 종류의 다양한 도서 중 어떤 것을 선택할 것인지? 등의 도서 선택과 독서에 도움을 줄 수 있는 그림책 서평을 정기적이고 지속적으로 작성 제공하여 독자들의 독서정보를 지원할 수 있어야 한다. 문학과 예술의 복합장르인 그림책 서평을 작성하기 위하여서는 내용소개는 물론 시각 텍스트에 관한 문학적 상징성 등의 해설적인 정보를 제공할 수 있어야 한다. 이를 위하여 사서는 작가의 사상과 철학을 이미지로 형상화한 심층적인 의미를 읽을 수 있는 시각적 문식성을 갖추어야 한다. 이에 옛 이야기 "빨간모자"를 다룬 두 작가의 그림책을 비교 분석하여 그림책 서평 작성 시 참고하여야 할 시각적 텍스트에 관한 이해를 돕고자 하였다.

• 한국산업보건학회지
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• 제11권1호
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• pp.1-8
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• 2001

This study was performed to evaluate a local exhaust ventilation system capability and welding fume concentration in welding laboratory at 5 technical high schools. Results of the study are as follows; 1. The personal exposure of welding fume in welding laboratory was measured. The geometric mean of 73 personal samples was $6.27mg/m^3$($3.85{\sim}9.88mg/m^3$), and 68.5% of these exceeded TLV of the Korea Ministry of Labor. 2. The geometric mean of welding fume at outside of booth was $2.27mg/m^3$($1.57{\sim}2.58mg/m^3$). All of measured concentrations were lower than TLV of the Korea Ministry of Labor. 3. Local exhaust ventilation system in welding laboratory could not remove hazardous substance effectively because of inappropriate canopy hood and absurd design. 4. The possibility of exposure risk was estimated to be high because of working point under breathing zone, misplacement of working table and insufficient supply of respiratory protector. 5. The mean values of capture velocity and transportation velocity of local exhaust ventilation system in welding laboratory were 0.38m/sec, 4.27m/sec respectively. These values were satisfied the guideline of the Korea Ministry of Labor. 6. The efficiency of performance of local ventilation system was anticipated to be decreased because of accumulated dust and alien substance on fan and duct.

• 한국산업보건학회지
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• 제9권2호
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• pp.110-122
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• 1999

Hot-wire anemometers are most commonly used in measuring hood capture velocities due to their accuracy and convenience. But it was questionable that the anemometers being used in the field are accurate enough for the purpose of measurements. To answer this ques tion, a calibration wind tunnel was newly devised and tested. Subsequently, 53 hot-wire anemometers being currently used in the field were tested to evaluate the accuracy of anemometers. The average error was 16.93% while the average errors in the low (0.5~5m/s) and high (5~20m/s) velocity range were 17.40% and 16.45%, respectively. Most of anemometers underestimated the true velocities. It might be due to the contamination of hot-wire, resulting in the slow heat transfer between the sensor and air flow. Astonishingly, 16 of 53 anemometers were out of order due to the malfunctioning of zero adjustment control, power supply, display panel and sensor. It is desirable to calibrate periodically and clean the sensor after using in the dirty environment.

• 대한방사선기술학회지:방사선기술과학
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• 제44권5호
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• pp.481-487
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• 2021

This study was conducted for the purpose of efficient radioactive waste disposal and management. Experiment was evaluated the decontamination efficiencies of the four types decontamination materials(Water, Alcohol, Decontamination Water, Decontamination Gel) with radioactive wastes generated during radio-pharmaceutical production process at Korea Institute Radiological and Medical Sciences(KIRAMS). The radioactive waste sample used in experiment is a lead plate of the fume hood that was disposed in April, 2019. In the experimental method, radioactive waste was measured before and after decontamination using a HPGe semiconductor detector and Gamma survey meter. The measured values before and after decontamination were evaluated for decontamination efficiency as a percentage. As a result, it was confirmed that a lot of specific activity and surface dose rate was removed from the radioactive wastes. In particular, when decontamination water was used, most of the radioactivity of radioactive wastes was removed. Considering these results, if decontamination water is used in decontamination of radioactive waste, decontamination efficiency equivalent to the disposition criteria can be expected with just one decontamination treatment. In addition, in the case of water and alcohol, only on decontamination was effective in approximately 75% and 95%. Otherwise, when decontamination gel was used, it was confirmed that the largest deviation occurred among all experimental results.

• 복식문화연구
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• 제18권6호
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• pp.1153-1164
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• 2010

The objective of this study is to analyze the coordination images seen in comprehensive fashion items and their features. This will be done from the viewpoint of both the creativity as well as functional characteristics of items and images. For the method of study, I explored the idea of "snood" style, analyzing its features of 42 pictures appearing from the 2006 S/S to 2010 F/W collection. It is important to note that "snood" style has the characteristics of both a muffler and turtleneck. With looping design connected at both ends, it can be placed around the neck or head, creating the image of wearing a hood. After having examined the selected data and pictures, one can largely divide the exclusive high-fashion image categories into three types: feminine, avant-garde, and finally, active & functional sportive image. First, the orthodox image is widely accepted by most as it has forever evolved within the original tradition of the practically functional muffler(scarf). Second, since the metamorphic image tends to lend itself to free ideas, you can wear a snood around the shoulders like a collar. Worn together with the same type of clothing, the snood can be seen as an effective suit. Third, the aim of image emphasis is to highlight certain points, or make some features more noticeable, as a means of possibly attracting more interest and attention. The image of snood arises out of the use of shapes, colors, and other accessory parts. As mentioned earlier, snood stands out as an independent item instead of just being an accessory to clothing. Its primary function as a style coordinator is emphasized in order to create more distinctive fashion images. Through this study, I thereby intend to provide fashion style data on the latest trends, and high-fashion codes of snood coordination.

• 한국유체기계학회 논문집
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• 제7권1호
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• pp.17-23
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• 2004

Aeroacoustic characteristics of sirocco fan used in Over-The-Range (OTR) has been analyzed in this paper. A microwave hood combination over the gas range is short for the OTR. The flow phenomena of the double-sided sirocco fan was analyzed numerically and experimentally by using commercial code and three dimensional PIV for flow visualization. Also, microphone array is used in order to understand acoustic characteristics of OTR. Two dimensional unsteady flow and acoustic simulation is tried to qualitatively estimate the effects of tonal noise and broadband noise on the overall sound pressure level. It is found that tonal sound is generated from the strong interaction between the impeller and cutoff while broadband sound is generated from the strong secondary flows along the scroll surface. To reduce the noise level, the V-shape cut-off was applied to improve the sound quality by reducing tonal noise. So the peak noise at BPF (Blade Passing Frequency) was almost reduced. The shape of flow-guide to suppress the secondary flow over the scroll surface was carefully checked. It is found that this affects flow pattern at the fan exit and reduces the broad band noise. Through this numerical and experimental study, the sound pressure level was lowered by 4dBA compared to that of the previous fan at the operating point.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 1997년도 International Symposium on Fire Science and Technology
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• pp.439-449
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• 1997

Studies have been carried out to determine the effect of sprinklers on fires typical of a number of occupancies including simulated of office furniture, supermarkets, carpet displays, libraries, video stores and liquor stores. After surveys of actual fire loads, the experiments were conducted in a specially designed sprinklered fire-calorimeter with a collecting hood 6 m x6 m leading to a vertical duct 1 m in diameter. Details of the rig are given elsewhere [1]. Only well ventilated fires were studied. Rate of heat release and production of various toxic chemicals were monitored during the tests. Both sprinklered and unsprinklered fires were used. The results were used to establish the unsprinklered burning behaviour and the fire-control effects of sprinklers. Before sprinkler operation, the rate of fire growth could be modelled as 12_fires as given in NFPA 92B (1991 Edition) [2]. It was found that operation of sprirnklers controlled but did not extinguish the fires. This was expected as parts of the fire load were shielded from the spray. Also there were significant increases in the concentration of carbon monoxide when the sprinklers operated. Sprinklers had little effect on the concentrations of other toxic products measured. The results from the tests were extrapolated to large single storey buildings for the same occupancy classes and the results used to compare the required and the available escape times for different occupancies, particularly whether the use of sprinklers would improve the chances of escape from those premises. It was found that in most of the cases studied, adequate escape times will be available without any special measures. For very rapid fire growths, however, special measures, such as availability of trained staff may be needed. Standard response sprinklers will have little impact.

• 한국전자파학회논문지
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• 제17권3호
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• pp.272-279
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• 2006

본 논문에서는 W-CDMA(Wide band Code Division Multiple Access) 시스템에서 채널 측정 및 프레임 동기 확인에 사용되는 파일럿 비트 패턴의 프레임 동기 단어(frame synchronization words) 성능을 분석한다. 또한 W-CDMA 시스템에서는 두 개의 수신 단말기를 갖지 않고도, 다른 주파수의 측정을 하기 위해 압축 모드(compressed mode)를 사용한다. 제안된 프레임 동기용 이원 부호의 우선 쌍 간의 보완 매핑(complementary mapping) 관계를 이용하면, 압축 모드에서도 프레임 동기 특성을 유지함을 컴퓨터 시뮬레이션을 통하여 확인한다. 검출 확률과 오 경보 확률을 갖는 수신기 동작 특성(ROC: Reciever Operating Characteristic) 곡선은 LLRT(Log Likely-hood Ratio Test), GLRT(Generalied Likeiyhood Ratio Test), 연판정(soft correlation test), 경 판정(hard correlarion test)과 같은 다양한 검출법(detection metrics)을 이용하여 레일레이 페이딩 채널에서 제안된 프레임 동기 단어의 성능 분석에 사용된다. 이 논문의 파일럿 비트 패턴의 성능에 대한 연구 결과는 3세대 W-CDMA 시스템에서 프레임 동기의 설계 및 구현에 유용한 참고 자료가 될 수 있을 것이다.