• Title/Summary/Keyword: T-test analysis

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The Mechanical Properties of Corrugated Cardboard using Equivalent Evaluation (등가 물성 평가를 이용한 골판지의 물성치)

  • Kwon, Kyung Young;Jung, Jong-Yun
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.37 no.1
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    • pp.157-164
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    • 2014
  • The usage of corrugated cardboard for packing material is increasing in these days because it is light and easy to manufacture packing boxes. However, the structure analysis of packing boxes, made of cardboard, is not well carried. The reason can be deduced that its mechanical properties for structure analysis are not well known. The cardboards are made different shapes with various types of raw materials that are paper-based compound. In addition, the cardboards are considered to be orthotropic material. This research finds mechanical properties of triple layered cardboard which is composed of outer liner and inner liner. The moduli of elasticity and of shear for liners are found from tension test and T-Peel test. The mechanical properties of the cardboard are calculated using the super position method and equivalent evaluation method.

The Influences of Family Resource Locus of Control and Coping Styles on the Stress from the Family Resource Management in Housewives (가정자원, 통제소재 및 스트레스 대처방법이 주부의 가정자원관리 스트레스에 미치는 영향)

  • 장윤옥
    • Journal of Families and Better Life
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    • v.15 no.4
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    • pp.287-300
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    • 1997
  • The purpose of this study was to explore the degree of the stress from the family resources management according to objective resources and to investigate the relative importance of the variables which affect the stress from the family resources management in housewives. The subjects of this study were 565 married women who lived in apartment in Taegu. A questionnaire was used as survey method. The data was analyzed by means of factor analysis, t-test, ANOVA, Scheffe test and multiple regression analysis. The main findings were as follows First there was significant difference in the degree of the stress from the family resources management according to the objective resource. Second, the stress from the family resources management were more affected by perceived adequacy resource, the passive coping style, size of apartment than other variables.

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Analysis of the parameter change of high power lithium ion battery according to vibration test based on statistical analysis (통계적 분석에 기반한 진동에 따른 고출력 리튬이온 배터리의 파라미터 변화 분석)

  • Lee, P.Y.;Yoon, C.O.;Kim, J.H.;Jang, S.S.
    • Proceedings of the KIPE Conference
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    • 2017.07a
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    • pp.453-454
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    • 2017
  • 본 논문에서는 환경 시험 중 한가지 방법인 진동 시험(Vibration test) 프로파일을 적용하여 고출력 리튬이온18650 셀(cell)에 물리적인 진동을 가하고 진동 시험 전 후 고출력 리튬이온 18650 셀의 전기적 특성 기반 내부 파라미터를 추출하였다. 통계적 기법인 상관 관계 및 대응 표본 t 검정을 적용하여 내부 파라미터인 방전 용량(discharged capacity), 방전 저항(discharged resistance), OCV(open circuit voltage) 간의 관계 및 변화를 비교 분석하였다.

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The Effects of Personal Characteristics on Job Stress of Workers in Fashion and Textile Industries (개인적 특성에 따른 섬유패션산업 구성원의 직무스트레스 분석)

  • 박광희;유화숙
    • Journal of the Korean Society of Clothing and Textiles
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    • v.27 no.3_4
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    • pp.373-383
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    • 2003
  • The purpose of this study was to investigate the effects of personal characteristics on job stressors, job stress symptoms, and job performance of workers in fashion and textile industries. Personal characteristics includes gender, marital status, educational level, age, type of industry, type of occupation, job position and work period. The data were obtained from questionnaire completed by 529 workers who were employed by textile or clothing manufacturers located in Seoul, Daegu, or Gyeongsang-do province. The SPSS package was used for data analysis which includes frequency, factor analysis, t-test, ANOVA and Scheffe's test. The results indicated that all personal characteristics had significant effects on job stressors, job stress symptoms, and job performance. Age and job position among personal characteristics showed to be the most important variables which influenced job stressor, job stress symptoms, and job performance.

The influence of mileage program on brand loyalty of the apparel firm (의류업의 마일리지 제도가 브랜드 충성도에 미치는 영향)

  • 오경화;심혜연;홍병숙
    • Journal of the Korean Society of Clothing and Textiles
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    • v.27 no.3_4
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    • pp.384-394
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    • 2003
  • The purpose of this research is to provide the apparel companies with a successful business strategy by analyzing the concept, function and current status of mileage programs; and examining how customer's attitude, recognition, experience, compensation method of the mileage program in apparel companies affect its brand loyalty. In this research simple random sampling was performed. The sample pool was based on 494 people which included college students and employed men and women in their twenties and thirties living in Seoul and in the metropolitan area. The data analysis was completed on the basis of SPSS package, using frequency, percentage, mean, standard deviation, factor analysis, variation, Scheffe test, regression, t-test, and X/sup2/. The following results were found in this research: It is effective to maintain brand loyalty through continuous relationship with consumers as fierce competition increases in apparel companies. A mileage program is a win/win strategy that allows clothing companies to increase its sales and brand loyalty while consumers feel greater satisfaction.

Research on Environmental Design Implementation in Taiwan's Manufacturers Certified by ISO 14001

  • Chung, Yi-Chan;Tsai, Chih-Hung
    • International Journal of Quality Innovation
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    • v.7 no.1
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    • pp.177-194
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    • 2006
  • This research investigates the status of environmental design implementation in Taiwan's industries (Certified by ISO 14001) by employing questionnaire survey. The correlation between the degree of environmental design implementation in Taiwan's industries and the relevant entrepreneurial characteristics are examined. Twenty-six environmental design principles in four phases: design, manufacturing, sales and transportation, and disposal are used to define and assess the current status of environmental design. The data analysis methods applied to this research includes descriptive statistics, T-test, Chi-square test, and single-factor analysis of variance (ANOVA). It is evident that 21 out of the 26 environmental design principles are frequently and consistently employed by the manufacturers in Taiwan. The results indicate that environmental design implementation is becoming mature in Taiwan's industries.

Friction Model for Finite Element Analysis of Sheet Metal Forming Processes (박판 성형공정 유한요소 해석용 마찰모델)

  • Keum Y.T.;Lee B.H.
    • Transactions of Materials Processing
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    • v.13 no.6 s.70
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    • pp.528-534
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    • 2004
  • In order to find the effect of lubricant viscosity, tool geometry, forming speed, and sheet material properties on the friction in the sheet metal forming, friction tests were performed. Friction test results show that as the lubricant viscosity becomes lower, the friction coefficient is higher. When surface roughness is extremely low or high, the friction coefficient is high. The bigger die corner radii and punch speed are, the smaller is the friction coefficient. From the experimental observation, the friction model which is the mathematical expression of friction coefficient in terms of lubricant viscosity, roughness and hardness of sheet surface, punch corner radius, and punch speed is constructed. By comparing the punch load found by FEM using the proposed friction model with that obtained from the experiment in 2-D stretch forming, the validity and accuracy of the friction model are demonstrated.

Vibration-Analysis of rubber-tired AGT light rail vehicle (고무차륜 AGT 경량전철 차량의 진동해석)

  • Kim Y.S.;Jeon R.G.;Lim T.K.;Lee J.S.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.10a
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    • pp.39-42
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    • 2005
  • Dynamic model of the Korea standardized rubber-tired AGT light rail vehicle, and boundary conditions between vehicle and infrastructures (running track, guidance rail) were defined to analyze vehicular vibration behaviors occurred at the worst condition. Using the commercialized software RecurDyn, vibration accelerations of car body and bogies were analyzed. and, based on the ISO standard 2631-1, the vibration characteristic test is performed in the test track. As the results, the Korea standardized rubber-tired AGT light rail vehicle satisfied the ISO standard criteria and design requirement.

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Family Variables affecting Compulsive Buying Behavior on Fashion Products (강박구매행동에 영향을 미치는 가족변인에 관한 연구: 패션제품을 중심으로)

  • Lee, Seung-Hee
    • Journal of Fashion Business
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    • v.13 no.4
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    • pp.77-84
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    • 2009
  • The purpose of this study was to examine family factors affecting compulsive buying behavior. Three hundred fifty-five female college students who had purchased fashion products through Internet shopping or TV home shopping participated in this study. For data analysis, descriptive statistics, correlation analysis, t-test, multiple regression, and reliability test. As the results, approximately 18% of respondents were revealed as compulsive buyers. Compulsive consumption scores were correlated to higher previous childhood consumption experience, family matters, parents' compulsive consumption tendency, and reference group. Also, results of multiple regression revealed that previous childhood consumption experience, parents' compulsive consumption tendency, and reference group were significantly related to compulsive buying, Finally, there were significantly differences between compulsive buyers and non-compulsive buyers on previous childhood consumption experiences, parents' compulsive consumption tendency, and reference group. Based on these results, this study would provide significant implications to academic scholars, consumer policy decision makers, and marketers.

The Study on the Tattoo Image and Appearance Satisfaction according to the Self-Esteem (자아존중감 유형에 따른 타투이미지와 외모만족도 연구)

  • Lee, Woonhyun
    • Journal of Fashion Business
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    • v.17 no.1
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    • pp.114-130
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    • 2013
  • The present study analyzed the tattoo image and body satisfaction according to the self-esteem. The samples were consisted of 191 female college students located in Kyunggi-do. The survey was implemented during may~july, 2012. Data were analyzed by frequency, factor analysis, cluster analysis, ANOVA, t-test, CPA, and Duncan-test. The results are as follows. Significant difference about tattoo image and body satisfaction was found in the group divided by the self-esteem. 'Individual personality' group had a tendency to be higher level than other group about appearance satisfaction and to be better image about Tattoo. 'Ego-centrism' group showed low level about good image of Tattoo. However, that group more satisfied their appearances than other groups. 'passive management' group showed lower level than other group about positive Tattoo image-building.