• Title, Summary, Keyword: Difference in Differences

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Basic Research for the Tactual User Interface Design (촉각적 사용자 인터페이스 디자인에 관한 기초 연구 -소형 원형 버튼의 크기 판별을 중심으로-)

  • Yang, Seung-Mu;Jeong, Byung-Yong
    • IE interfaces
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    • v.13 no.2
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    • pp.253-257
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    • 2000
  • This study was conducted to test the significance of differences in the tactual difference thresholds and perception time for tactual direction type and finger type and radius size based on small circular button. The results show that difference threshold of vertical tactual perception is significantly greater than horizontal perception, but there are no significant differences in difference thresholds among finger types and radius sizes. Also, there are no significant differences in tactual perception time among tactual direction types, finger types, and radius types. These findings are applicable for tactual user interface design.

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Cross-Cultural Study on the Meaning Evaluation and Preference in Color Palettes (실내색채팔레트에 대한 의미평가의 문화집단별 비교연구)

  • 박영순;윤지영
    • Korean Institute of Interior Design Journal
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    • no.5
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    • pp.53-58
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    • 1995
  • The purpose of this study is to explore how people's evaluation and preference on color palettes differ based on their cultural background. This study used the same color palettes developed by Youngsoon Park and Denise Guerin(1992). Fourteen representative adjectives are used to analyze the meaning evaluation and preference on the six color palletes. 425 undergraduate students are se-lected from Korea, Japan, U.S. and England and ques-tionnaire was used as survey instrument. The results show that there are significant differences among the four countries in the meaning evaluation and preferences on the color palettes and the characteristics of color palettes influence the differences among the countries. The differences among the countries decrease in case of color palettes composed of warm color with low or medium value difference and chroma difference, while the differences increase in case of color palette characterized by strong color contrast with high or medi-um value difference and chroma difference. The result of color meaning evaluation can be catego-rized into Western and Eastern culture. Korea and U.S., and Japan and U.S. showed significant differences in the most words and Korea and Japan showed similarities in the most words. Therefore it can be concluded that cul-tural backgrounds related to race, region and history in-fluence the color meaning evaluation and preference. Fur-ther study should explore the relationship between color and culture using more various color instruments such as color palettes in order to categorize the various aspects of culture.

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Stress, Coping and Suicidal Ideation among School-aged Children: Focused on Daegu/Gyeongbuk Region (학령기 아동의 스트레스와 대처 및 자살 생각: 대구.경북 지역을 중심으로)

  • Choi, Hye-Seon;Lee, Mi-Kyoung
    • The Journal of the Korean Society of School Health
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    • v.25 no.1
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    • pp.85-94
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    • 2012
  • Purpose: The purpose of this study was to investigate the stress, coping and suicidal ideation among school-aged children and provide evidence for developing a stress management program for them. Methods: Data were collected and analyzed from 308 fifth graders from 6 elementary schools located in Daegu/Gyeongbuk. Results: First, for stress by general characteristics, there were significant differences in economic status, school record, self-rated health and life satisfaction. Also, subcategory stress by gender, there was a significant difference in appearance stress. Second, passive/avoidant coping had a significant difference in gender. Social support seeking coping and passive/avoidant coping were significant differences in economic status. Active coping had a significant difference in school record. Passive/avoidant coping had a significant difference in self-rated health. Aggressive coping, active coping, social support seeking coping and passive/avoidant coping had significant differences in self-rated life satisfaction. Third, stress and coping had significant differences by suicidal ideation. Fourth, stress showed positive correlations with aggressive coping and passive/avoidant coping while revealing negative correlation with active coping. Conclusion: These results from the study suggest difference by gender and need more active and positive coping strategy for suicide prevention.

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Research on the Evaluation of the Differences in Financial Variablesof Chain Restaurants Using Multivariate Analysis of Variance (다변량 분산분석을 이용한 체인 레스토랑의 재무변수 차이 평가 연구)

  • Kang, Seok-Woo
    • Culinary science and hospitality research
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    • v.14 no.1
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    • pp.21-38
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    • 2008
  • This research aimed to analyze the differences in financial variables classifying chain restaurants. A total of 126 samples were drawn from financial statements for $2001{\sim}2006$. As a result of analysis, there was a significant difference in Pillai's Trace, Wilks' Lambda, Hotelling's Trace, and Roy's Largest Root values at the significant probability value(p<0.05) based on F value in terms of stability among chain restaurants. Difference was found only in current rate and liabilities in ANOVA. There was a great difference in current rate among institutional restaurants, fast food restaurants, and cafeterias. There was a significant difference in Pillai's Trace, Wilks' Lambda, Hotelling's Trace, and Roy's Largest Root values at the significant probability value(p<0.05) based on F value in terms of restaurants' profitability. In ANOVA, difference was found only in net profits to net sales. It was revealed that all factors showed no significant differences in multiple comparison. All multi-variant test statistics showed a significant difference in growth and turnover. ANOVA showed a significant difference in net sales growth rate, net profit growth rate, and total assets growth rate.

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A Study on Reliability of Computerized Cephalometric Analysis System (두부 방사선 규격사진 컴퓨터 분석기의 신뢰도에 관한 연구)

  • Woo-Cheon Kee
    • Journal of Oral Medicine and Pain
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    • v.19 no.2
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    • pp.47-55
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    • 1994
  • To investigate the reliability and reproducibility of the computerized cephalometric analysis system, se compared the differences of the 10 linear and 13 angular measurements by manual works and the use of computerized cephalometric analysis system. We obtained as follows : 1. There was not significant difference between maean values of 22 manual and computerized measurements. 2. There was not significant difference between mean differences of manual and computerized cephalometric analysis data taken by same examiner except facial depth, facial length and posterior facial height. 3. There was not significant difference between mean differences of two trials of the computerized cephalometric analysis data by same examiner in all measurements. 4. There was not significant difference between mean differences of the computerized cephalometric analysis data by two examiners except FMIA and IMPA. According to this result, we guess the use of computerized cephalometric analysis system is useful on diagnosis and treatment planning of othodontic patients.

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Cultural Differences impact on the ERP System Implementation (문화 차이가 ERP 시스템 구현에 미치는 영향)

  • Kim, Kyung-Ihl;Park, Ji-Young
    • Journal of Convergence Society for SMB
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    • v.6 no.2
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    • pp.1-9
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    • 2016
  • In the modern business environment, ERP System is a tool for efficient use of the resources of the company. Implementation of the ERP System is not a simple introduction of the unit system. The changes and innovation of the company will be made through the BPR. And then, the BPR is made based on the system design and implementation. Cultural difference creates a difference in the attitudes and relationships of members of company. and, Cultural difference produce differences in organizational culture and operating principles. Cultural differences can mention the differences in the cultures of East and West, and can mention the difference between each country within the same culture. In the paper, we determine the impact of cultural differences on the implementation of the ERP System. Cultural differences affect the implementation process and the decision-making process, user interface.

The Influence on Ambulation of the Difference in Muscle Strength on Lower Extremity of Hemiplegic Patients (편마비 환자의 하지의 근력 차이가 보행에 미치는 영향)

  • Yoon, Jang-Soon
    • Journal of Korean Physical Therapy Science
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    • v.12 no.3
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    • pp.47-58
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    • 2005
  • The purpose of this study is to estimate how much the motility of affected and unaffected lower limb respectively would have effects on their ambulation through comparing the difference between their affected and unaffected lower limb and studying the correlation between such difference and their ambulation. In addition, the study also intends to find out remedial measures suitable for improving their ambulation with relevant physical treatment. To do this, a quantitative electromyogram(QEMG) test was done to both quadriceps and hamstring of affected and unaffected lower limb so as to yield IP values. Based on such IP values, RMS(root mean square) values as the total sum of IP values were found with QEMG analysis system (made by Medelec Co.) and then the ambulation depending on the difference in muscular strength were analyzed by ink-foot print method as well as the corresponding statistics were processed by T-test through SPSS. The effect of differences in muscular strength of quadriceps in affected and unaffected limb of hemiplegic patients on their ambulation was also different in each element of ambulation. However, there was not any statistically significant difference (p>.05). The differences in muscular strength of hamstring in unaffected limbs of hemiplegic patients only affect stride length. It was statistically significant. The effect of difference in muscular strength of the hamstring in affected limb of hemiplegic patients on their ambulation was very different between strong and weak group in terms of walking velocity, step per minute, stride and step length, showing statistically significant difference(p<.05). Although there was a difference in the step length of the affected limb, it was not statistically significant(p>.05). For the unaffected hamstring, there were significant differences of stride length between in unaffected limb and in affected limb. For the affected hamstring, there were also significant differences in walking velocity, step per minute, stride and step length. Besides, it was found that the difference of the muscular strength between strong and weak group was at the highest. Thus, the effect of difference in muscular strength on ambulatory factors such as walking velocity, step per minute, stride and step length did not show any statistical significance but differences in affected and unaffected quadriceps. However, it was found that both the difference of stride in unaffected hamstring and the difference of all ambulatory factors except from step length with affected limb had effects on ambulation depending upon muscular strength.

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A Study on Store Image and Clothing Satisfaction of the Clothing Distribution type (의류 유통업태의 점포이미지와 의복만족도에 관한 연구)

  • 임숙자;김선희
    • Journal of the Korean Society of Clothing and Textiles
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    • v.23 no.2
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    • pp.185-195
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    • 1999
  • The purpose of this study is to identify store image and clothing satisfaction of various clothing distribution type and is to compare the difference due to demographic variables. The data were obtained 407 housewives using questionnaire. The results were as follows. First Store image of clothing distribution types was found significant differences in product service atmosphere. Second Clothing satisfaction of clothing distribution types was founded significant differences in price brand name fashion design material sewing size. Third The new distribution types in general were not visited upon despite their high degree of recognition and using experience of new distribution types was founded significant differences in Store image of new distribution types. Fourth Among demographic variables significant difference in usage of the distributions was founded. Fifth Among demographic variables significant difference in usage of the distributions was founded. Fifth Among demographic variables significant difference in clothing satisfaction of the distributions was founded.

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The research on the Career Plan of the Dental Technology Students (Revolve Around D College Students) (치기공과 재학생의 진로계획에 관한 실태 조사 - D대학 학생을 중심으로 -)

  • Bae, Bong-Jin;Lee, Hwa-Sik
    • Journal of Technologic Dentistry
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    • v.33 no.4
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    • pp.479-493
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    • 2011
  • Purpose: The career education of the college student needs a new awareness. This research provides fundamental data from analyzing necessities of student's career education according to plans of a career education. Methods: Make use of SAS 8.0 of windows and descriptive statistics analysis on investigate Dental Technology 570 students in Daegu. And also it analyzes difference of ispectable t-test and ANOVA. Results: According to a gender, a job experience, where they are come from, there is a meaningful difference of an information and an entrance motive for choosing a major (<.05). The time of choosing the major are different meaningfully (<.001). An awareness about the method of a career achievement is a meaningful difference between men and women(<.05). As getting old, the method of a career achievement is higher and there are meaningful differences according to a grade, job experience and a entrance screening(<.01). In accordance with a gender, a grade, entrance screening, there are meaningful differences of a degree for obtaining the career information activities(<.01). In accordance with an age, when they choose a major, there is a difference(<.001). In accordance with a gender and a age, there are meaningful differences of a career plan(<.001). The age difference is slight. In accordance with a gender and a age, there are meaningful differences how to effort for the career(<.001), and also according to an entrance screening, an entrance motive(<.05). These mean that the first priority for choosing the career and going into the world is a school record. There are meaningful differences of people that the student choose for consulting the career(<.01). According to the job experience there are meaningful differences(<.001). Conclusion: By investigating and analysing the student's career plan, we need to seek how students choose their career reasonably and desirably. And also we need to teach a career education systematically.

The evaluation of fabric on the Internet -The difference of cotton fabric texture perceived between on-line and off-line- (인터넷에서의 소재 평가에 대한 연구 -실물과 영상에서의 면직물 유사성 평가-)

  • 신혜원;이정순
    • Journal of the Korean Society of Clothing and Textiles
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    • v.28 no.3_4
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    • pp.396-402
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    • 2004
  • The purpose of this study was to investigate the difference of cotton fabric texture perceived between on-line(screening fabric) and off-line(real fabric), and to analyze fabric characteristics having an effect on the difference. The similarity of 55 various cotton fabrics perceived between on-line and on-line were measured showing simultaneously real fabrics and screening fabrics by 7-scale questionnaire. And the characteristics of cotton fabrics such as weave structure, thickness, weight, fabric density, stiffness, Hunter's L, a, b, and hue were measured. Cotton fabrics were classified into 3 groups by extent of similarity. There were no significant differences in weft density, stiffness, Hunter's L, a, b, and hue among 3 groups. But there were significant differences in weave structure, thickness, weight, warp density, and difference of warp & weft density. The fabrics having large similarity were thick and heavy, had small warp density and difference of warp & weft density, and distinct surface texture. The group having medium similarity included fabrics of medium thickness and weight, having weak surface texture, large warp density and difference of warp & weft density. The group having small similarity, which the differences between on-line and off-line were large, included thin and light fabrics having smooth surface and large warp density and difference of warp & weft density.