• 제목/요약/키워드: difference in difference

검색결과 72,207건 처리시간 0.081초

Correction of CIEDE2000 Color Difference Formula for the Analysis of Low Chroma and Low Lightness Colors

  • Woo Hwa-Lyung;Kim, Sam-Soo;Hudson Samuel M.
    • 한국염색가공학회지
    • /
    • 제18권5호
    • /
    • pp.72-79
    • /
    • 2006
  • There are many discrepancies between visually perceived color-difference and that which is quantified from an instrumental measurement when dark color samples are measured in the textile industry. The samples were prepared to represent these dark shades and the values of the instrumental results from conventional color-difference formulae(CIELAB, CMC, BFD II, CIE94, LCD99 and CIEDE2000). Those of visual assessment were compared. The experimental results show that the CIELAB formula gives the best performance over other formulae, and the CIEDE2000 formula for the color-difference according to chroma presents the worst performance. Therefore, we can say that the problems in color matching of dark shades are caused by imperfect formula, because the results obtained from a color-difference formulae are different and the CMC which is used as a standard color-difference formula in the textile industry is not correct. So, a revised color-difference formula is proposed in this study, to account for these problems.

시각장애 아동과 정상 아동의 선자세 균형 비교 (The Comparison Between Blind and Normal Children in Standing Position)

  • 김중선;이정순
    • The Journal of Korean Physical Therapy
    • /
    • 제15권1호
    • /
    • pp.119-154
    • /
    • 2003
  • In this paper, the proprioceptive sensitivity was compared by Foot-Hand task method and the effect of the proprioceptive sensitivity and auditory to the standing position between blind and normal children was measured using BPM for 56 children in 7, 8, 9 and 10 years old. There are three measurement methods are used for BPM : Rest, Forward Looking, 'Sound' position. The following conclusions were obtained from the above measurements. 1. In comparison of proprioceptive sensitivity between blind and normal children, there is no significant difference(p > .05). There is no significant difference in comparison of each age group and also there is no difference in each gender group(p > .05). 2. In comparison of standing position measurement between blind and normal children, there is any difference (p > .05) in three measurement(Rest, Forward Looking, 'Sound' position) but there is no significant difference in each gender difference(p > .05). There is any difference between Rest and 'Sound' position of blind children, also there is any difference between Forward Looking and ' Sound ' position, rest and 'Sound' position of normal children(p > .05). 3. There is no significant difference of correlation between proprioceptive sensitivity test and standing position measurement in Pearson correlation coefficient(p > .05).

  • PDF

여성에 있어서의 비만도에 따른 우울, 불안, 자아존중감의 차이 -기초연구- (Differences in Depression, Anxiety, Self-esteem According to the Degree of Obesity in Women -A Pilot Study-)

  • 이준환;김광호;김종우
    • 동의신경정신과학회지
    • /
    • 제13권2호
    • /
    • pp.93-100
    • /
    • 2002
  • Objects and Methods : BDl, STAI and Self-Esteem scale were completed by 28 female subjects who composed of nurses of Kyung Hee Medical Center and students of Kyung Hee Oriental Medical college. At the same time, current weight, height and BMI(Body Mass Index), ideal weight, height and BMI, the difference of current weight and ideal weight, the difference of current height and ideal height, and the difference of current BMI and ideal BMI were measured. Result : 1. There was a significant difference between obese and normal weight group in the difference between the current weight and the ideal weight. The difference of the obese group were higher than the normal weight group. 2. There was a significant difference between obese and normal weight group in the mean BDI score. The mean BDI score of the obese group were higher than that of the normal weight group. 3. There was no significant difference between obese and normal weight group in the mean STAI score. 4. There was no significant difference between obese and normal weight group in the mean Self-Esteem Scale score. Conclusion : There are a tendency; the more weight, the more depression in women.

  • PDF

간접구(間接灸)의 제품별(製品別) 입열기(入熱期) 연소특성(燃燒特性)에 관한 연구(硏究) (The experimental study on the Characteristics of the Moxa-Combustion in the input period of indirect moxibustion)

  • 하치홍;조명래;채우석;박영배
    • Journal of Acupuncture Research
    • /
    • 제17권1호
    • /
    • pp.89-105
    • /
    • 2000
  • In order to obtain the clinical data on the different effects of the three different methods of indirect moxibustion, moxa-combustion time, peak temperature, average temperature, maximum gradient temperature, average gradient temperature, and moxa-combustion calorie rate of the input period in ARIRANG, JANG, PUNG were measured through this experiment. The results of the experiment were as follows : 1. In the combustion time, during the input period ARIRANG had the longest combustion time followed by PUNG, JANG in a descending order but these were not acknowledged to have significant difference each other. 2. In the peak temperature of the input period, PUNG had the highest temperature followed by ARIRANG, JANG in a descending order. ARIRANG and JANG were acknowledged to have significant difference with PUNG. ARIRANG and JANG however were not acknowledged to have difference each other. 3. In the average temperature, during the input period, PUNG had the highest temperature followed by JANG, ARIRANG in a descending order. ARIRANG and JANG were acknowledged to have significant difference with PUNG. ARIRANG and JANG however were not acknowledged to have difference each other. 4. In the maximum gradient temperature, during the input period, PUNG had the highest temperature followed by ARIRANG, JANG in a descending order. ARIRANG and JANG were acknowledged to have significant difference with PUNG. ARIRANG and JANG however were not acknowledged to have difference each other. 5. In the average gradient temperature, during the input period, PUNG had the highest temperature followed by ARIRANG, JANG in a descending order. ARIRANG and JANG were acknowledged to have significant difference with PUNG. ARIRANG and JANG however were not acknowledged to have difference each other. 6. In the moxa-combustion calorie rate, during the input period, JANG had the highest temperature followed by ARIRANG, PUNG in a descending order. ARIRANG and PUNG were acknowledged to have significant difference with JANG. ARIRANG and PUNG however were not acknowledged to have difference each other.

  • PDF

요추간판 수핵탈출중 수술환자의 체간부 굴근 및 신근의 등속성 운동 평가 (Isokinetic Evaluation of the Trunk Flexors and Extensors of Operated Laminectomy & Disectomy Patients)

  • 최병옥
    • 대한물리치료과학회지
    • /
    • 제3권2호
    • /
    • pp.951-961
    • /
    • 1996
  • Isokinetic exercise is dynamic, but the spped of movement must be regulated so that the resistance is in ratio to the force applied at each point throughout the full range of motion. The purpose of this study is to comparise with trunk flexors & extensors of isokinetic evaluation of pre-exercise and post-exercise in operated laminectomy & disectomy patients. 7 subjects were examined at $120^{\circ}$/sec and $60^{\circ}$/sec each 15 days. The results were as follows; 1. Peak torque of extensors on $60^{\circ}$/sec showed significant difference statistically(p<0.05), but peak torque of flexors on $60^{\circ}$/sec showed no significant difference statistically. 2. Trunk flexors/extensors ratio of peak torque of $60^{\circ}$/sec showed no significant difference ststistically. 3. Peak torque % B.W of extensors on $60^{\circ}$/sec showed significant difference statistically(p<0.05), but peak torque % B.W of flexors on $60^{\circ}$/sec showed no significant difference statistically. 4. TAE of extensors on $60^{\circ}$/sec showed significant difference statistically (p<0.05), but TAE of flexors on $60^{\circ}$/sec showed no significant difference. 5. Total work of flexors & extensors on $60^{\circ}$/sec showed significant difference statistically (p<0.05). 6. Average power of flexors & extensors on $120^{\circ}$/sec showed significant difference statistically(p<0.05). 7. Endurance ratio of flexors & extensors on $120^{\circ}$/sec showed no significant difference statistically. 8. Set total work of flexors & extensors on $120^{\circ}$/sec showed significant difference statistically(p<0.05). 9. TAE of extensors on $120^{\circ}$/sec showed significant difference statistically(p<0.05), TAE of flexors on $120^{\circ}$/sec showed no significant difference statistically. 10. Total work of flexors & extensors on $120^{\circ}$/sec showed significant difference statistically (p<0.05).

  • PDF

Implant에 사용되는 CAD/CAM 전용 zirconia abutment의 표면적과 디자인에 따른 유지력 차이 (Differences in retention of the reduction direction depending on dimensions and design CAD/CAM zirconia abutment for implant)

  • 남택모;김한곤;김병식;임시덕
    • 대한치과기공학회지
    • /
    • 제32권4호
    • /
    • pp.317-325
    • /
    • 2010
  • Purpose: The aim of this study is to make some basic materials to find retention force difference based on the total height of CAD/CAM zirconia abutment used for implant, retention force difference based on how to regulate the height of the abutment, retention force difference based on the size and retention force difference based on the design group. Methods: The retention force was measured by being pulled at the speed of 1mm/min after being combined with zirconia block and abutment using Temp-BOND of Kerr. The experiment was done at the research lab of OSTEM in Busan by useing UNIVERSAL TESTING MACHINE on March 3rd, 2010. Results: After analysing the total height and the retention force, p-value had minor difference by 0.01 statistically. Namely, 3mm, 4mm, 5mm had the retention force difference and we could see retention force difference on 3mm and 5mm at the post test. After analyzing how to regulate the height and retention force, p-value had minor difference by 0.000 statistically. Namely, 1mm and 2mm had the retention difference and we could see that 1mm and 2mm with the total height had retention difference. After analyzing the retention force based on the size, p-value had minor retention force difference by 0.000 statistically. Namely, 7 different size had retention force difference and we could see the size 21.9mm, 32.9mm, 32.9mm, 38.4mm, 48.9mm and 54.9mm had retention force difference. Conclusion: Namely 9 different design group had retention difference and we could see that 9 design group with 5.6.7.8 design group and 9 design group with 1.2.3.4. design group had retention force.

사상체질에 따른 적성검사의 비교연구 (A Comparative Study on the Characteristics According to the Sasang Constitution)

  • 설유경;김종원
    • 사상체질의학회지
    • /
    • 제14권2호
    • /
    • pp.45-57
    • /
    • 2002
  • 1. Purpose and Methode of study This study is that How to connect the characteristics of Sasang constitionion with Aptitude Test. To know the characteristics of each individual in modern times Generally, Psychological Aptitude Test is used. So, According to Sasang constitional groups classified with QSCC II, KIPAT occupation aptitude test ( total 55) and KAT-A aptitude test(total 260) was used. 2. Result of study 1) KIPAT occupation aptitude test rest of Sasang constitional groups Taeumin Group appeared high than another Group in investigative occupation and there is the significant difference between Taeumin Group and Soeumin Group Taeumin Group appeared high than another Group in technological occupation and there is the significant difference between Taeumin Group and Soyangin Group Taeumin Group appeared high than another Group in control aptitude and there is the significant difference between Taeumin Group and Soeumin Group Soyangin Group appeared high than another Group in instigation aptitude and progressive aptitude and there is the significant difference between Soyangin Group and Soeumin Group Soeumin Group appeared high than another Group in utility aptitude and there is the significant difference between Soeumin Group and Taeumin Group, between Soeumin Group and Soyangin Group. Soyangin Group appeared high than another Group in guilty conscience and there is the significant difference between Soyangin Group and Taeuwun Group. Soeumin Group appeared high than another Group in independence aptitude and there is the significant difference between Soeumin Group and Taeumin Group Taeumin Group appeared high than another Group in calculation ability and there is the significant difference between Taeunun Group and Soeumin Group 2) KAT-A aptitude test result of Sasang constitional groups Soyangin Group appeared high than another Group in vacabulary ability and there is the significant difference between Soyangin Group and Taeumin Group. When classified male and female, in the case of male, It showed that Soyangin Group is lower than Other Group in vacabulary ability and there is the significant difference between Soyangin Group and Taeumin Group , between Soyangin Group and Soeumin Group but there is no significant difference in the case of female.

  • PDF

주파수영역 음향 파동방정식에서 최소 격자수 결정을 위한 격자분산 분석 (A Dispersion Analysis for Minimum Grids in the Frequency Domain Acoustic Wave Equation)

  • 장성형;신창수;윤광진;서상용;신성렬
    • 지구물리와물리탐사
    • /
    • 제3권2호
    • /
    • pp.39-47
    • /
    • 2000
  • 복잡한 지층구조에 대한 파동방정식의 해를 유한 차분법을 이용하여 구하는것은 많은 컴퓨터 계산시간과 기억 용량이 필요하다. 컴퓨터 계산시간과 기억용량은 최소 파장당 격자수를 줄이므로써 감소 시킬 수 있지만 수치분산으로 인해 정확도가 떨어지게 마련이다. 본 연구에서는 정확도를 유지하면서 파장당 격자수를 줄이는 방법으로 이용되고 있는 가중평균법을 최대 169점 까지 확장하여 주파수 영역에서 음향파동방정식의 해를 유한차분법으로 구할 때 최소 격자수를 구하기 위한 격자분석을 실시하였다. 지금까지 수치오차가 정확도 $1\%$내에 존재하기 위해서는 일반적인 5점을 이용하는 경우 파장당 격자수가 13개 이상이 필요하고, 9점의 경우 9개, 25점에서는 3개, 49점에서는 2.7개 이상이 필요하였다. 본 연구에서 정확도를 유지하기 위한 최소격자수를 결정하기 위해 실시된 격자분석 결과 81점에서는 2.5개 121점에서는 2.3개 그리고 169점에서는 오차 한계를 벗어나 가중평균 계수를 구할 수 없었으며 격자수를 2개까지 줄일 수 없음을 알 수 있었다. 또한 격자분석을 통해 가중평균에 적용되는 격자수가 증가할수록 정확도는 증가하지만 차분식 자체가 증가하여 매우 복잡하게 된다.

  • PDF

UNIFORM TOPOLOGY ON DIFFERENCE ALGEBRAS

  • SAEID, ARSHAM BORUMAND
    • 대한수학회보
    • /
    • 제42권2호
    • /
    • pp.379-386
    • /
    • 2005
  • In this paper, we consider a collection of ideals of a difference algebra X. We use the concept of congruence relation with respect to ideals to construct a uniformity that induces a topology on X which makes this to a topological difference algebras. We study the properties of this topology regarding different ideals.

에코 소재 의류 제품의 구매 실태 및 구매 후 만족도 (A Study on the Actual Purchase Conditions and Post-Purchase Satisfaction for Clothing Made with Eco-friendly Fabric)

  • 박영희
    • 복식문화연구
    • /
    • 제19권1호
    • /
    • pp.1-18
    • /
    • 2011
  • The purpose of this study is to prepare the base for the development of the high value clothing products with eco-friendly fabric which become the conversation topic recently. In order to collect data, a questionnaire was used. The subject of survey was the adult women in from their 20's to 50's. The survey areas were Gyungnam, Busan, Ulsan, and Daegu in Korea. The questions were formed with the results of a preliminary investigation and the contents selectively revised the measurement tools used to the previous studies. To analyze the collected data, $x^2$2-test, t-test, ANOVA were carried out with SPSS. In the result of difference analysis of the actual purchase conditions according to demographic variables, the purchase motives, the purchase items, and the purchase information showed the significant difference according to the demographic variables except monthly income, and the purchase place showed the significant difference to all the demographic variables. The results of difference analysis of post-purchase satisfaction according to the demographic variables and the purchase items were as follows, The post-purchase satisfaction in price showed the significant difference according to age and monthly income. The one in design showed the significant difference according to educational level and occupation. The one in fashion showed the significant difference according to marriage or non-marriage, age, educational level and occupation. The one in the wearing sensation showed the significant difference according to marriage or nonmarriage, age, educational level, occupation. The one in transformation showed the significant difference according to educational level, monthly income, purchase item. The one in laundry and management convenience showed the significant difference according to monthly income and purchase item. Finally, the one in pollution level showed the significant difference according to age, monthly income, occupation, and purchase item.