• 한국지반환경공학회 논문집
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• 제11권12호
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• pp.37-45
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• 2010

초미립자시멘트는 입자 크기가 마이크로화되어 실트성 지반까지 주입가능하지만 점성이 높아 침투성이 저하되는 단점이 있다. 본 연구에서는 유동화제를 사용하여 점성을 낮춘 초미립자주입재의 그라우팅 효과를 평가하고자 암반에서 초미립자주입재와 보통시멘트주입재의 주입효과를 비교하였다. 시추조사, 현장수압시험, 공내재하시험, 공내전단시험, 단위주입량분석, p~q~t chart 유형 분석을 실시하였다. 시험 결과 초미립자주입재를 사용하는 경우가 보통시멘트 주입재를 사용하는 경우보다 투수성, 탄성계수 및 변형계수, 단위주입량 및 주입재 회수율 등 측면에서는 유리하지만 전단응력 측면에서는 차이가 거의 없는 것으로 나타났다.

• Animal Bioscience
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• 제37권1호
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• pp.142-150
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• 2024

Objective: This study was conducted to assess effects of heat stress on growth performance, physiological parameters, and blood profiles of Hanwoo steers during early-fattening period in climate chambers. Methods: Four Hanwoo steers (body weight, 454.3±10.9 kg; age, 14±0.1 month) were allocated into four levels of temperature-humidity index (THI) in a 4×4 Latin square design for 21 days (pre-adaptation, 7 d; heat stress, 7 d; post-adaptation, 7 d) per period. Experimental treatments were assigned according to THI chart based on National Institute Animal Science (NIAS, 2022): Comfort (25.5℃ to 26.5℃, 60%; THI 73 to 75), Mild (28℃ to 29℃, 60%; THI 77 to 79), Moderate (29.5℃ to 30.5℃, 80%; THI 82 to 84), and Severe (31℃ to 32℃, 80%; THI 85 to 86) in separate climatic controlled chambers. Results: The dry matter intake (DMI) of the formula feed was lower in Severe compared to Mild and Comfort (p<0.05). The DMI of rice straw was the lowest in Severe and lower in Moderate than Comfort and Mild (p<0.05). Both average daily gain and feed conversion ratio of Severe and Moderate were lower than those of Mild and Comfort (p<0.05). Water intake was the highest in Severe and lower in Moderate compared with Comfort and Mild (p<0.05). Heart rate and rectal temperature increased as THI level increased (p<0.05). Glucose was the lowest in Severe and lower in Moderate compared to Comfort (p<0.05). On the contrary, non-esterified fatty acid was the highest in Severe and lower in Moderate compared with Comfort (p<0.05). Blood urea nitrogen of Moderate and Severe were higher than those of Comfort and Mild (p<0.05). Cortisol increased as THI increased (p<0.05). Conclusion: This study demonstrated the negative effects of heat stress on the performance and physiological responses of Hanwoo steers during the early-fattening period. In addition, it is judged that the THI chart for Hanwoo steers of National Institute of Animal Science (2022) was properly calculated.

• 한국실내디자인학회논문집
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• 제21권2호
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• pp.101-111
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• 2012

The purpose of this study is to draw emotional evaluation model related to LED lighting colors and suggest basic informations that enable planned directions of architectural pacade lighting to simulate beforehand in a laboratory. As experimental methods, extracted PAD emotional evaluation model and then directed a experimental model of 10 LED lighting colors, studied and analyzed survey questions. The results are as follows; First, in the case of P(Pleasure-Unpleasure), Red, Yellow, Green, Cyan, Magenta, White and Combination of $G{\leftrightarrow}B$ Colors are satisfying, vibrant and positive distribution chart has shown. Second, in the case of A(Arousal-Unarousal), Red, Yellow, Green, Cyan, Blue, White and Combinations of $R{\leftrightarrow}G$, $G{\leftrightarrow}B$, $R{\leftrightarrow}B$ Colors, it makes a little difference, they have shown useful distribution chart to induce sight in a aroused state. Third, in the case of D(Dominance-Submissiveness), Red, Cyan, Green and Combinations of $G{\leftrightarrow}B$ Colors are free, controlling and extent of effect was excellent. On the contrary, in the case of Yellow and Magenta and Combinations of $R{\leftrightarrow}B$, they are gentle and arouse the protective instinct or feminine distribution chart has shown. Fourth, it showed difference of preference that difference of select ratios of both men and women in Orange, Blue, Greenish-Yellow (preference of man) and Magenta, Combinations of $R{\leftrightarrow}B$ Colors(preference of woman).

• 전기의세계
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• 제25권4호
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• pp.53-58
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• 1976

Criteria and significance of the factor .root..mu..$R_{u}$ or ($R_{u}$/.root.p) in Hall element material selection are discussed. And the chart which is useful to compare the figure of merit F=.root..mu..$R_{u}$ in Hall element materials is presented with the F's for some practical Hall device materials.als.

• 한국산학기술학회논문지
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• 제14권12호
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• pp.6373-6386
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• 2013

본 연구는 MBTI 성격유형과 심박변이도의 관계를 조사하기 위해 시도된 연구이다. 충청남도 C 시에 소재 한 N대학교 일개 응급구조학과 재학생들을 대상으로 학교 내에서 안정상태로 측정한 심박변이도와 병원 임상실습 중 2주째와 4주째에 측정한 심박변이도를 비교분석하였다. 자료수집기간은 2013년 6월 21일부터 7월 23일까지였으며, MBTI 성격유형에 따른 안정 및 실습기간의 심박변이도의 변화에서 네 가지 성격유형별 분포도에 따른 안정 및 실습기간의 HRV에서는 nHF와 SDNN에서 유의한 차를 보였다. 전체 지표별 선호 분포도에 따른 안정 및 실습기간의 심박변이도의 변화에서 nLF는 T-F, J-P 그룹, nHF에서는 T-F, J-P 그룹, SDNN에서는 S-N, mHR에서는 J-P 그룹에서 유의한 차이가 있었다.

• 품질경영학회지
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• 제44권3호
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• pp.587-600
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• 2016

Purpose: This paper evaluates the performance of the pre-control(PC), an alternative to statistical process control techniques and compares with a control chart considering the tolerance of process. Methods: The previous studies for PC have drawbacks that PC with two linked stages, qualification and running, are discussed separately and independently. Hence this paper analyzes the performance of PC by integrating two stages. Results: Average outgoing quality limits to grasp the outcome of PC are provided by computational results for two process capability indexes, $C_p$ and $C_{pk}$ and the usefulness of PC from comparative experiments with modified control charts is commented. Conclusion: Helpful guidelines for quality managers to apply PC in practice and areas of process for PC to be more benefit are presented.

• 산업경영시스템학회지
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• 제37권1호
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• pp.151-156
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• 2014

Control charts are generally used for process control, but the role of traditional control charts have been limited in case of a contaminated process. Traditional $\bar{x}$ control charts have not been activated well for such a problem because of trying to control processes as center line and control limits changed by the contaminated value. This paper is to propose robust $\bar{x}$ control charts which is considering a location parameter in order to respond to contaminated process. In this paper, we consider $\bar{x}_{\alpha}$, that is trimmed rate; typically ten percent rate is used. By comparing with p, ARL value, the responding results are decided. The comparison resultant results of proposed two control charts are shown and are well contrasted.

• Ocean Systems Engineering
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• 제9권2호
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• pp.157-177
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• 2019

Studies on motion response of a vessel is of great interest to researchers, since a long time. But intensive researches on stability of vessel during motion under dynamic conditions are few. A numerical model of vessel is developed and responses are analyzed in head, beam and quartering sea conditions. Variation of response amplitude operator (RAO) of vessel based on Strip Theory for different wave heights is plotted. Validation of results was done experimentally and numerical results was considered to obtain effect of damping on vessel stability. A scale model ratio of 1:125 was used which is suitable for dimensions of wave flume at National Institute of Technology Calicut. Stability chart are developed based on Mathieu's equation of stability. Ince-Strutt chart developed can help to capture variations of stability with damping.

• 한국지반환경공학회 논문집
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• 제12권9호
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• pp.79-87
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• 2011

기존의 액상화 방지를 위한 그라우팅은 부정확한 계측장비를 사용하고 시공 품질관리를 경험에 의존하는 단점이 있다. 본 연구는 ${\bigcirc}{\bigcirc}{\bigcirc}$ 고속도로 건설현장 내 말뚝기초 주변의 지반을 그라우팅으로 보강한 사례를 분석하여 액상화 대책공법으로서 그라우팅 보강효과에 대한 연구를 실시하였다. p-q-t 도표 유형분석을 통해서 결정된 주입압, 주입속도 및 주입대상지반의 입도특성, 주입재의 점도특성으로부터 도출한 결과를 그라우팅 자동관리시스템에 적용하여 그라우팅의 주입효과를 높였다. 주입 후 SPT 시험을 실시한 결과 N값이 5-20까지 증가하여 액상화에 대하여 안전한 것으로 나타났다.

• 대한수학회논문집
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• 제34권4호
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• pp.1175-1199
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• 2019

We construct a general bi-basic inverse series relation which provides extension to several q-polynomials including the Askey-Wilson polynomials and the q-Racah polynomials. We introduce a general class of polynomials suggested by this general inverse pair which would unify certain polynomials such as the q-extended Jacobi polynomials and q-Konhauser polynomials. We then emphasize on applications of the general inverse pair and obtain the generating function relations, summation formulas involving the associated polynomials and derive the p-deformation of some of the q-analogues of Riordan's classes of inverse series relations. We also illustrate the companion matrix corresponding to the general class of polynomials; this is followed by a chart showing the reducibility of the extended p-deformed Askey-Wilson polynomials as well as the extended p-deformed q-Racah polynomials.