• Title/Summary/Keyword: T-test analysis

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A Comparative Study of Dissatisfaction towards Imported and Domestic Clothing (수입의류와 국산의류의 불만족에 관한 비교연구)

  • 박혜정;박재옥
    • Journal of the Korean Society of Clothing and Textiles
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    • v.26 no.2
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    • pp.364-375
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    • 2002
  • The purpose of this study is to identify the differences between married women's dissatisfaction towards imported and domestic clothing and to test the role of socioeconomic variables on dissatisfaction. Two-piece formal suit was selected as the item, and country of origin of imported suit was not controlled. Sample selection criteria included married women living in Seoul, Korea, between ages 30-59. The data were analysed using factor analysis, paired t-test, and one-way ANOVA. The results indicate, in the Korean clothing market, both international and Korean marketers should be prudent with their price policies and should implement differentiated marketing strategy based on their target market's demogrophic profile. Higher dissatisfaction towards domestic clothing in terms of most factors, under the rapidly globalizing market environment suggests the Korean marketers will be forced to face full-scale harsh competition from international marketers.

Dynamic Characteristics and Adaptation of Elastic Coupling with Rubber Type Circular Segments (원형 고무 세그먼트를 갖는 탄성커플링의 동특성과 적응성)

  • Lee, D.C.;Barro, Ronald D;Kim, J.K.;Nam, T.K.;Yu, J.D.
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.21 no.4
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    • pp.346-351
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    • 2011
  • Medium and high speed marine diesel engines with reduction gear have been widely used as prime mover in small car ferries and fishing vessels. The elastic coupling should be installed and complemented the propulsion shafting system to isolate the vibratory torque between engine and reduction gear. In this paper, the dynamic characteristics of elastic coupling with rubber type circular segments is confirmed by theoretical analysis using the FEM and the hydraulic excitation test at shop. Further adaptation was investigated with the torsional vibration test at diesel engine factory shop.

A Study on Naturalness Assessment and Feasibility of Urban Stream (도시하천의 자연도평가 및 타당성검토에 관한 연구)

  • Kim, Kwang-Su;Ahn, Seung-Seop
    • Journal of Environmental Science International
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    • v.23 no.1
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    • pp.143-152
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    • 2014
  • The results which are from naturalness assessment and visual assessment was examined to accomplish a classification, a conclusion, a comparison and an analysis. Also statistical test was examined to identify applicability of the survey to other rivers according to the result of visual assessment. As a result of naturalness assessment and visual assessment, evaluation rate of Geumho river is the highest rank of the grade as 2.5. Also t-test was examined to apply items of visual assessment at other rivers through differences in means of river naturalness rates from which visual assessment results. Most of differences in means of river naturalness rates are significant. Thus assessment criteria can be applied to other rivers to find out unique characteristics because each item has independent characteristics.

A Study on the Actual Status and Needs of Leisure of Middle Age (여가활성화 방안 모색을 위한 여가실태 및 요구에 관한 연구 - 중년층을 대상으로 -)

  • Shin, Hwa-Kyoung;Lee, Joon-Min
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2004.11a
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    • pp.207-212
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    • 2004
  • The propose of this study is to grasp actual status and needs of leisure of middle age. The questionnaire survey is used, the subjects are middle age from 40${\sim}$50's living in big city. The questionnaire consists of leisure, leisure actual condition, leisure satisfaction and need. Frequency, percent, average, x2-test, t-test and ANOVA are used for data analysis. The results of this study are as following; First, leisure is necessary to elevate Quality of life in terms of spiritual , psychological stability and physical health. Second, subjects have more leisure time in weekend the characteristics of leisure time are scattered in woman. Third, in the future the subjects wish to have leisure with family. Therefore, it is necessary to develop leisure program and facilities to promote family leisure. Fourth, the subjects are not satisfied with current leisure for unsufficiency of leisure time, cost, facility and program. Fifth, present leisure behavior characteristics are restrictive and passive. In the near future, however, they showed desire to engage in divers forms of leisure including active and participant leisure.

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magnetic Field Analysis of Background Magnet in SSTF(Samsung Superconducting Test Facility) (삼성 초전도 시험설비의 외부자장 발생용 자석의 자기장 해석)

  • ;王秋良
    • Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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    • 2000.02a
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    • pp.147-149
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    • 2000
  • Samsung Superconducting Test Facility (SSTF) will be built at SAIT, Taejeon. The superconducting cables to be used for KSTAR magnets are going to be tested in SSTF. The background magnet in SSTF is needed to simulate harsh magnetic environment for testing short CICC samples as well as full-scale magnets. The main coils can make central magnetic field of up to 8 Tesla and the blip coils can maintain fast ramping rate of 20T/s. The cancellation coils reduce the disturbance of main coils due to blip coils. The magnetic field distribution of these coils has been obtained with finite element method as well as the direct integration method.

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The Stress Measurement of Membrane Type LNG Storage Tank (멤브레인식 LNG저장탱크 응력측정법)

  • Kim, Y.K.;Hong, S.H.;Yoon, I.S.;Oh, B.T.;Seo, H.S.
    • Proceedings of the KSME Conference
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    • 2000.04a
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    • pp.138-142
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    • 2000
  • In LNG Tank, it is very important to measure the strain in Membrane by theoretical and experimental stress analysis. In this paper, perform the test about strain gage, thermal sensor and lead wire to make clear the properies. The test results conclude that stress measurement by strain gage must consider the effect of many factors to measure strain acculately. The corrections should be made on apparent strain, lead wire length and Membrane shape. It is also important to measure the temperatures accurately at the strain gage location

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Maternal Psychosocial Factors Affecting Breast Feeding Practice (모유수유 실천에 미치는 산모의 사회심리적 요인)

  • Yeo, Jung-Hee
    • Women's Health Nursing
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    • v.13 no.3
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    • pp.149-156
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    • 2007
  • Purpose: This study aimed to elucidate the prevalence of breast feeding and maternal psychosocial predictors affecting the breast feeding practice at six months postpartum. Method: One hundred and sixty one mothers at six months postpartum were conveniently recruited in two public health center in Jeju-city. Subjects completed a well-structured questionnaire regarding the feeding types of the child, maternal self-esteem, the Edinburgh Postnatal Depression Scale (EPDS), husband support, and marital adjustment scale. The data was analyzed using the $X^2-test$, t-test, Pearson correlation coefficients, and logistic regression. Result: The prevalence of breast feeding at six months postpartum was 29.9%. Predictors of breast feeding practice identified by the logistic regression analysis include first feeding type after delivery, marital adjustment, readiness for maternal role and work state. Conclusion: The prevalence of breast feeding practice was lower than WHO desired at six months postpartum. Therefore, the findings support the need for breast feeding education including interventions focused on improving readiness for maternal role and marital adjustment.

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Cognizance of Size and Preference Design of Hats of College Students (대학생의 모자 치수 인지도 및 선호 디자인에 관한 연구)

  • Lee, Jin-Hee
    • Korean Journal of Human Ecology
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    • v.11 no.3
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    • pp.301-306
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    • 2002
  • The purpose of this research is to provide basic data by which more suitable hats manufacturing can be possible. The method for this research was to ask male and female college students what their favorite design and size are by the questionnaire. Data were collected from 383 college students in Seoul, Iksan. Statistical tests such as descriptive analysis, Crosstabs, F-test, Duncan test, were used to analyze the data. The conclusion which gotten through this process is that, first of all, their favorite design is Apollo cap, and there is no difference between male and female college students. Then, It also appeared that most of them didn't know their own hat size, but responded that their hats are suitable for their heads, it means that they are contented with their hats. Yet, those positive responses are, in some part, due to the insufficiency of the questions that can point out negative responses.

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Relationship between Knowledge, Stress, and Nursing Performance about Care for Delirium in Geriatric Hospital Nurses (노인요양병원 간호사의 섬망에 대한 지식, 섬망간호스트레스 및 섬망간호수행간의 관계)

  • Kim, Eun-Hee
    • Journal of Korean Clinical Health Science
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    • v.4 no.2
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    • pp.593-602
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    • 2016
  • Purpose. The purpose of this study was to investigate knowledge, stress and nursing performance about care for delirium in geriatric hospital nurses. Methods. For this study, data were collected from 242 nurses employed at geriatric hospitals with the capacity of more than 100 beds which were located in A, P and Y cites. Frequency analysis, t-test and one-way ANOVA were utilized to analyze the data and Scheffe test was used to conduct post-hoc tests. Results. Nurses showed significant differences in the level of Knowledge, as well as terminal care performance by marital status, nursing experience. A significant relationship was found between knowledge, stress and Delirium care performance. Conclusion. This study found nurses perform delirium care with a high level of stress but with insuffiecient understanding, and thus, showed great needs for related training. Such findings can be useful to develop educational programs to improve knowledge on delirium and plans to reduce stress from delirium for geriatric hospital nurses.

A Study on the Digital DC Protection Relay through with Field Adoption Test in the DC Distribution System (직류급전시스템 시험적용 사례를 통한 디지털 직류 보호계전기에 관한 연구)

  • Ko, In-Suk;Cha, Kwang-Seok;Min, Byung-Hoon
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.55 no.12
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    • pp.646-652
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    • 2006
  • This study identifies the comparison of Technical specification and Characteristics of DC Protection Relay(ETCPU200) used in DC Distribution System in Korea. ETCPU200 has completed Field Test and approved its capability by finding out causes of recent operations through lately developed digital DC protection relay in parallel operation at Maebong-Substation, Sangbong-Substation, Nakseongdae-Substation, Euljirosaga-Substation, Jegi-Substation and Chongyangri T/P area. It also examines additional features for efficient System Analysis and Operations.