전조등 조도변동에 대한 운전자의 인식연구 : 3. 운전자의 심리적 특성

김현지(Hyun-Ji Kim),김현진(Hyun-Jin Kim),김기훈(Gi-Hoon Kim),김훈(Hoon Kim),안옥희(Ok-Hee An) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.5월

In this study, psychological assessment was carried out to investigate the driver"s psychological characteristics by the change of the headlight. The participants were 20 men and 20 women in their 20s and thirty-two different conditions in combinations of waveform of light, voltage, and alteration time were used. The questionnaire for the assessment was evaluated by 8 subjective items and 5-point SD criteria of 19 pair"s adjective. The results were as follows. 1. The assessment results from SD method indicated 3 factors by factor analysis, and it was shown that A waveform had significances in a sense of security and impetus and B waveform had a significance in a sense of security. The levels of the limitations for the voltage change were 12V in the factor of a sense of security and 11V in the factor of a sense of impetus for A waveform, 12.6V in the factor of a sense of security for B waveform. 2. The results of the subjective assessment showed that the limitation of A waveform"s brightness change was 12V. Moreover, the limitations of voltage changes were 12.6V for B waveform brightness change, 12V for discomfort, 12.6V for darkness. And the limitation of C waveform"s brightness change was 12V.

전조등 조도변동에 대한 운전자의 인식연구

김현지(Hyun-Ji Kim),김현진(Hyun-Jin Kim),김기훈(Gi-Hoon Kim),김훈(Hoon Kim),안옥희(Ok-Hee An) 한국조명·전기설비학회 2006 조명·전기설비학회논문지 Vol.20 No.10

본 연구는 전조등 밝기변화에 따른 운전자의 심리적 특성을 밝히기 위하여 심리평가를 실시하였다. 피험자는 20대 남, 녀 각각 20명 총 40명이며, 실험조건은 파형, 전압, 변동시간으로 구성한 32개 조건이다. 평가는 8개의 주관적 평가항목과 19쌍의 형용사로 구성된 5점 SD척도의 평가지를 사용하였다. 그 결과를 요약하면 다음과 같다. 1. SD법의 심리평가 결과, 요인분석에서 4요인으로 나타났으며, A파형은 안전감과 자극감 요인에서, B파형은 안전감 요인에서 유의차가 나타났다. 또한 A파형은 안전감 요인에서 12[V], 자극감 요인에서 11[V]가 전압변동의 한계치로 나타났으며, B파형에서는 안전감 요인이 12.6[V]가 한계치로 나타났다. 2. 주관적 평가 결과, A파형의 밝기변화의 한계치는 12[V]로 나타났다. 또한 B파형의 밝기변화는 12.67[V], 불쾌감은 12.12[V], 어두워짐에 대해서는 12.71[V]가 전압변동의 한계치로 나타났다. C파형의 밝기변화의 한계치는 12[V]로 나타났다. In this study, psychological assessment was carried out to investigate the driver's psychological characteristics by the change of the headlight. The participants were 20 men and 20 women in their 20s and thirty-two different conditions in combinations of waveform of light, voltage, and alteration time were used. The questionnaire for the assessment was evaluated by 8 subjective items and 5-point SD criteria of 19 pair's adjective. The results were as follows : 1. The assessment results from SD method indicated 4 factors by factor analysis, and it was shown that A waveform had significances in a sense of security and impetus and B waveform had a significance in a sense of security. The levels of the limitations for the voltage change were 12[V] in the factor of a sense of security and 11[V] in the factor of a sense of impetus for A waveform, 12.6[V] in the factor of a sense of security for B waveform. 2. The results of the subjective assessment showed that the limitation of A waveform's brightness change was 12[V]. Moreover, the limitations of voltage changes were 12.67[V] for B waveform brightness change, 12.12[V] for discomfort, 12.71[V] for darkness. And the limitation of C waveform's brightness change was 12[V].

전조등 조도변동에 대한 운전자의 인식연구 : 4. 운전자의 뇌파측정 및 분석

안옥희(Ok-Hee An),김현진(Hyun-Jin Kim),김기훈(Gi-Hoon Kim),김훈(Hoon Kim),김현지(Hyun-Ji Kim) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.5월

In this study, tests of brain waves were carried out to investigate the driver"s physiological characteristics by the change of the headlight. The participants were 20 men in their 20s and twenty-three different conditions in combinations of waveform of light, voltage, and alteration time were used. The measurement of the brain waves was performed by internationally standardized 10-20 method using LXE3232-RF. The results were analyzed by Power Spectrum Analysis using alpha-, and beta-wave and by the analysis of different brain domains using Brain wave Map. The results were as follows. 1. From the results of the Brain wave Map analysis, it was suggested that A waveform increases mental stress and B waveform affects mental and visual stress. The longer the stimulation time, the more stress level was detected. 2. The voltage alteration time of B waveform should be kept less than 1500msec, and the voltage should not fall below 11.5V.

화장품 제조에 쓰이는 Pigments 가 수분산 제형에 미치는 영향에 대한 연구

김현지 ( Hyun Jee Kim ),오지원 ( Ji Won Oh ),곽병문 ( Byeong Mun Kwak ),이미기 ( Mi Gi Lee ),빈범호 ( Bum Ho Bin ) 대한화장품학회 2021 대한화장품학회지 Vol.47 No.1

수분산 제형은 사용 시 가루 날림이 없고, 끈적이지 않으며 가벼운 사용감을 주면서 밀착력이 높은 특징이 있어 색조 화장품에 많이 이용된다. 하지만 색조 화장품에 사용되는 수분산 제형에서 안료가 미치는 영향에 관한 연구는 거의 검토되지 않았다. 이에 본 연구에서는 색조 화장품 제조에 주로 쓰이는 무기색소, 유기색소, 진주광택안료 등의 안료를 각각 분산시켜 만든 수분산 제형에서 안료가 제형에 미치는 영향에 대하여 외관의 변화, pH의 변화, 광안정성을 측정하고 분석하는 연구를 진행하였다. Carmine 또는 ferric ferrocyanide가 코팅된 이산화티탄 마이카 계 색소는 저점도 수분산 제형에서 수상에 색이 우러나오며, 광안정성이 좋지 않아 사용에 적합하지 않았다. 유기 색소는 수분산 제형에서 1%의 함량으로 광안정성은 양호했으나 수상에 색이 우러나오고, 파우더끼리 뭉쳐서 잘 분산되지 않으므로 사용에 적합하지 않았다. 진주광택안료, 무기 색소, 산화철이 코팅된 이산화티탄 마이카 계 색소는 수분산 제형에서 외관 및 광안정성이 우수하여 사용에 적합하였다. 또한 각각의 안료를 분산시킨 모든 시료의 pH는 모두 3.0 - 9.0 범위 안에 들어 화장품 법에 적합한 것으로 보인다. 이는 색조 화장품 중 수분산 제형에서 안료의 거동을 예상하고 안정한 색소를 선택 및 사용하여 안정한 수분산 제형의 색조 화장품을 제조하는데 도움을 줄 것으로 기대된다. Formulations which are dispersed in water are often used in color cosmetics because they are characterized by no powder flying, not sticky, and high adherence while giving a light feeling of use. However, little research has been considered on the effect of the pigment on the above formulations used in color cosmetics. In this study, experiments were conducted to measure and analyze the effect of pigments on the formulation of pigments, organic pigments, and pearl polish, which are mainly used in the manufacture of color cosmetics, on appearance changes, pH changes, and photometric stability. Carmine or ferric ferrocyanide coated titanium dioxide mica-based pigments were not suitable for use due to poor photostability, with colors appearing on the surface from low viscosity formulations. Organic pigments had a good photostability of 1% of the formulation which are dispersed in water, but were not suitable for use because they came out of color on the water surface and did not spread well due to the clumping of powders. The titanium dioxide mica system pigments coated with pearl polish, inorganic pigments, and iron oxide were suitable for use due to their excellent appearance and optical stability in the formulation. Furthermore, the pH of all samples distributed by each pigment seems to be within the range of 3.0 to 9.0, which is suitable for cosmetic applications. This is expected to help manufacture color cosmetics with a stable water dispersible formulations by selecting and using stable pigments in anticipation of the behavior of pigments in the formulations.

석류 비가림하우스 무농약재배가 수량과 품질에 미치는 영향

나양기(Yang Gi Na),김현지(Hyun Ji Kim),윤봉기(Bong Ki Yun),최경주(Kyong Ju Choi),김월수(Wol Soo Kim) 한국원예학회 2011 한국원예학회 학술발표요지 Vol.2011 No.5

‘한아름’ 배의 화총수 조절이 배 과실 품질에 미치는 영향

나양기(Yang Gi Na),조정안(Jeong An Jo),김현지(Hyun Gi Kim),나택상(Taik Sang Na) 한국원예학회 2009 한국원예학회 학술발표요지 Vol.2009 No.10

‘신고’배의 과대지 도장지 전정 시기와 정도가 신초생육에 미치는 영향

나양기(Yang Gi Na),김현지(Hyun Ji Kim),윤봉기(Bong Ki Yun),김월수(Wol Soo Kim) 한국원예학회 2010 한국원예학회 학술발표요지 Vol.2010 No.10

고유수용성신경근촉진법(PNF) 수축-이완 기법의 직접적 간접적 방법의 비교

김난영,김은혜,김현지,김희온,박순우,박슬기,유승용,유지연,이현옥,Kim, Nan-Young,Kim, Eun-Hye,Kim, Hyeon-Ji,Kim, Hee-On,Park, Sun-U,Park, Seul-Gi,Yu, Seung-Yong,Yu, Ji-Yeon,Lee, Hyun-Ok 대한고유수용성신경근촉진법학회 2016 PNF and Movement Vol.14 No.1

Purpose: The purpose of this study was to determine the effectiveness of direct and indirect methods of contract-relax techniques in proprioceptive neuromuscular facilitation (PNF) stretching for improving hamstring flexibility. Methods: Twenty-six subjects were randomly assigned to either a direct contract-relax technique group or an indirect contract-relax group. For each group, stretching intervention was performed three times a week for a period of two weeks, with 12 seconds for the contraction and 10 seconds for the relaxation per once. The direct contract-relax technique for hamstring flexibility was applied by asking the subject to press down on the shoulder of the trainer in the straight leg-raising position. Conversely, the indirect contract-relax technique was performed by raising the leg with resistance. To facilitate a comparative analysis of hamstring flexibility between the two groups before and after the stretching intervention, two-way repeated ANOVA was performed. Hamstring flexibility for each group was measured using a passive straight leg-raising test. Results: The results showed significant improvement in hamstring flexibility for all subjects in the two groups. However, there was no significant difference between the groups. Conclusion: In conclusion, both direct and indirect contract-relax techniques are confirmed to be useful for improving hamstring flexibility. The choice of suitable technique has to be made individually according to the condition of each subject.

파우더와 오일의 배합 비율이 탈크 프리 프레스드 파우더 제형의 안정성에 미치는 영향에 관한 연구

오지원 ( Ji Won Oh ),김현지 ( Hyun Jee Kim ),곽병문 ( Byeong Mun Kwak ),조한태 ( Hantae Jo ),이미기 ( Mi-gi Lee ),빈범호 ( Bum-ho Bin ) 대한화장품학회 2021 대한화장품학회지 Vol.47 No.1

프레스드 파우더의 주요 안정성 요인으로 경도와 낙하 안정도가 있다. 일반적으로 탈크가 포함된 프레스드 파우더의 경우 경도와 낙하 안정도를 고르게 충족시키며 사용감도 우수하지만 최근 탈크의 석면 이슈로 인해 대체를 원하는 고객들이 늘고 있다. 따라서 안정성을 유지하면서 사용감도 떨어지지 않는 탈크 프리 프레스드파우더 제형의 개발이 시급하다. 본 연구에서는 탈크 프리 프레스드 파우더를 만들기 위한 최적의 원료 배합비율을 찾기 위한 실험을 진행하였다. 파우더에 주로 사용되는 원료들의 특성을 확인하고 비율을 변화시켜 실험하여 명도와 경도를 측정하고 낙하 시험을 실시하였다. 천연 마이카 함량이 합성 마이카보다 많거나, 코팅된 실리카 대신 논 코팅 실리카를 사용할 경우 탈크가 포함된 내용물보다 경도와 낙하 안정도는 낮지만 명도는 유사하였다. 반대로 합성 마이카 함량이 천연 마이카 함량과 동일하거나 높을 경우, 코팅된 실리카 함량이 논코팅 실리카 함량과 동일하거나 높은 경우에 탈크가 포함된 내용물의 경도, 낙하 안정도와는 유사하였으나 명도는 낮게 측정되었다. 탈크가 포함된 내용물보다 경도는 높지만 낙하 안정성은 떨어지는 현상도 발견하여 경도와 낙하 안정성의 상관관계에 대해서는 추가적인 연구가 필요할 것으로 생각된다. The main stability factors of the pressed powder include hardness and drop stability. In general, for pressed powder with talc, the hardness and drop stability are evenly met and the skin texture is excellent. Recently, more than ever customers are looking for a replacement due to asbestos issue of talc. Therefore, it is urgent to develop a pressed powder formulation without talc that maintains stability and does not lose its sense of use. In this study, experiments were conducted to find the optimal ingredients mixing ratio to make talc-free pressed powder. The characteristics of raw materials used mainly in powder were checked and the ratio was changed, and the lightness and hardness were measured and drop test was conducted. If the natural mica ratio was higher than the synthetic mica or non-coated silica was used instead of the coated silica, the hardness and drop stability were lower than the content containing talc, but the lightness was similar. Conversely, if the synthetic mica ratio was equal to or higher than the natural mica ratio and the coated silica ratio was equal to or higher than the non-coated silica ratio, the hardness and drop stability of the content containing talc were similar, but the lightness was low. It was found that the hardness was higher than the content containing talc, but the drop stability was lower. Therefore, further study of the correlation between hardness and fall stability is also thought to be necessary.

대구 봉산문화거리의 갤러리 조명연출계획

박민경(Min-kyoung Park),김현지(Hyun-Ji Kim),차상기(Sang-gi Cha),안옥희(Ok-hee An) 한국조명·전기설비학회 2007 한국조명·전기설비학회 학술대회논문집 Vol.2007 No.5월

This study purports to survey on the illumination environment design in gallery. These gallery spaces need to improve individual illumination environments, in compliance with the recommended ratio of illumination intensity to brightness, and to create a new illumination design using a wide variety of illuminations.