• Title/Summary/Keyword: T-test analysis

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FEM and Ultrasonic Testing for Adhesive Joints Strength of Thin Metal Sheets (금속재료의 접착이음부에 대한 유한요소해석과 초음파실험)

  • Oh, S. K.;Hwang, Y. T.;Jang, C. S.;Oh, S. S.;Yi, W.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.10a
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    • pp.726-730
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    • 1997
  • One approach to testing the suitability of an adhesive joint for a particular application is to build and test to destruction a representativc, sample of the joini. The noncdestructive test will not measure strength directly but will measure a parameter which can be correlated to strength. It is thercforc, essential that a suitable nondestructive rest is chosen and that its results are correctly intcrpreted. In this paper, typical Ultrasonic Signal Analysis in adhesive joints are cvaluatcci together with Interface Stress from the result of Finite Elenlent Method.

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Development and Evaluation of the e-learning Orientation Program for Nursing Student's Adapting to Clinical Practicum (임상실습 적응을 위한 e-learning 오리엔테이션 프로그램 개발 및 평가)

  • Yi, Yeo Jin
    • Korean Journal of Adult Nursing
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    • v.19 no.4
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    • pp.593-602
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    • 2007
  • Purpose: The purpose of this study was to develop an e-learning orientation program for nursing students(junior), to evaluate the program, and to find out its effects on adapting to clinical practicum. Methods: The e-learning orientation program was developed according to ADDIE model(analysis, design, develop, implement, evaluate) using an Active Tutor Program. Twelve nursing professionals and 31 nursing students(learners) evaluated the e-learning orientation program. Thirty one nursing students participated in the e-learning orientation program both on-line and off-line. Results: The e-learning orientation program consisted of 5 parts including 'Taking a lesson in gastrointestinal tract', 'Fundamental nursing skill and reading a medical chart', 'Taking a ward orientation by head nurse', 'Clinical practice with preceptors', and 'Writing for case report'. Adapting scores to clinical practicum were significantly different between pre-test and post-test(t=-5.76, p=.000). Conclusion: The e-learning orientation program of on-line and off-line has an effect on adapting to clinical practicum for nursing students.

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Determination of the Forming Limit Strain of Sheet Metals by the Time-dependent Method (시간의존법에 의한 금속판재 성형한계변형률의 결정)

  • Kim, S.G.;Oh, T.H.;Kim, J.D.;Kim, H.J.
    • Transactions of Materials Processing
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    • v.24 no.5
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    • pp.361-367
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    • 2015
  • The forming limit diagram (FLD) is the most commonly used tool for evaluating of sheet metal formability in the manufacturing field as well as the finite element analysis (FEA)-based design process. Determination of the forming limits is considerably influenced by testing/measuring machines, techniques and conditions. These influences may cause a large scatter in FLD from laboratory to laboratory. Scatter is especially true when the ‘position-dependent method’, as is specified in most national and international standards, is used. In the current study a new ‘time-dependent method’ is proposed, which is to determine the forming limit strains more accurately and reasonably when producing a FLD from experimental data. This method is based on continual strain measurement during the test. The results are compared to those from the existing standardized methods.

A Study on Status Incompatibility and Marital Conflict Resolution Method. (부부간의 지위부조화와 갈등해결방법에 관한 연구)

  • 이영숙
    • Journal of Families and Better Life
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    • v.8 no.1
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    • pp.49-67
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    • 1990
  • The purpose of this study is to investigate the relations between marital status incompatibility and the ways of dealing with marital conflict. Research was conducted by interview using questionnaire on 177 employed wives. Statistics used for data analysis were frequency distribution, percentage, t-test, chi-square test. 1) In resolving marital conflict four types of method are appeared, namely constructive method, passive method, evasion and physical violence. 2) Only physical violence of husband-to-wife of the four methods is related to status in-compatibility. That is the incidence rate of physical violence of husband-to-wife in incompatible couples is higher than that of compatible couples in conflict situations. 3) In case the wife's occupational status is high relative to her husband the incidence rate of physical violence of husband-to-wife is extremely high, but is significantly low in couples which are compatible in this status. 4) In case wife's status advance ent is controlled, there is significant relationship between status incompatibility and the method of conflict resolution by husband whose wife is status striver.

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Effect of Self-differentiation and Family Function on Mental Health in Adolescents (청소년의 자아분화 수준 및 가족기능이 정신건강에 미치는 영향)

  • Lee, Hea-Shoon
    • Child Health Nursing Research
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    • v.16 no.4
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    • pp.297-303
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    • 2010
  • Purpose: The purpose of this study was to identify the relationship of self-differentiation, family function and mental health among adolescents. Methods: The data were collected from 967 adolescents and analyzed using descriptive statistics, t-test, ANOVA, Scheffe's test, Pearson correlation coefficient and Stepwise multiple regression with the SPSS program. Results: Mental health differed according to grades, sibling position, father's education and mother's education. Self-differentiation and family function had a significant negative correlation with mental health. Multiple regression analysis showed recognition.emotional function, emotional cutoff and family projection as influencing self-differentiation. Grades, affective responsiveness in family function, and sibling position explained 20.8% of the total variance in mental health. Conclusion: The findings show that self-differentiation and family function influence mental health, indicating a need to develop nursing intervention programs to enhance adolescents' mental health and prevent negative outcomes. For these programs, the family must be included.

Factors Influencing Medication Adherence in Hypertensive Patients (일 지역 고혈압 환자의 약물치료 이행의 영향요인)

  • Seo, Yeong-Mi
    • Research in Community and Public Health Nursing
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    • v.21 no.1
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    • pp.82-91
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    • 2010
  • Purpose: The purpose of this study was to identify factors that influence medication adherence in patients with hypertension. Methods: One hundred sixty two patients with hypertension who visited the outpatient clinics of health centers in J City participated in the study. Data were collected through a questionnaire survey done from January 9 to February 25, 2008. To analyze the sample survey data, descriptive statistics, t-test, ANOVA, Scheffe's test, and multiple regression analysis were performed with SPSS/WIN 12.0. Results: Significant factors that affect medication adherence in patients with hypertension were autonomous motivation, competence, health status, and sex. These variables explained 24% of medication adherence (F=12.48, p<.001). Conclusion: The results indicate that in order to improve the medication adherence of patients with hypertension it is important to develop nursing programs that focus on autonomous motivation and competence and to give consideration to differences in health status and sex. Also further studies are needed to confirm autonomous motivation related to health behavior in patients with hypertension.

A Study on the Mechanical Properties of Wool Fabrics -The effect of the structural conditions of the fabrics- (모직물의 역학적 특성에 관한 연구)

  • 박정순
    • Journal of the Korean Home Economics Association
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    • v.27 no.1
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    • pp.1-8
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    • 1989
  • In order to investigate the mechanical properties such as tensile, bending, shearing, thickness and weight of the wool fabrics were measured by KES-F system. Samples were classified into blend ratio, weave type, fabric count. Blend ratio was classified into two groups, which are P/W blended fabric (p=63~65%, w=35~37%) and all wool fabric. Weave type was classified into four groups, which are plain, 3 harness twill, 4harness twill, satin. Cloth count was classified into three groups, which are loose, medium, tight. Statistical analysis was performed using T-test, F-test. The results were as follows; 1. There was significant difference in the thickness, tensile, bending, shearing according to the blend ratio. 2. According the weave, there was significant difference in the bending, weight and thickness in the P/W blended fabrics. There was significant difference in the tensile, weight, thickness, bending, shearing, shearing hysterisis (2HG) in the all wool fabrics. 3. There was significant difference in the shearing properties according to the fabric count.

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Undergraduate Students' Image of the Elderly based on Knowledge and Attitudes

  • Lee Shin-Sook;Salari Sonia
    • International Journal of Human Ecology
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    • v.5 no.2
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    • pp.31-49
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    • 2004
  • The purposes of the study were to examine the trend of undergraduate students' knowledges and attitudes toward elderly and aging traits, and to present the influence of undergraduate students' attitudes. The subjects were 494 undergraduate students. Statistics used such as frequency, Percentage, Mean, Standard Deviation, Cronbach's ${\alpha}$, t-test, Duncan test, ANOVA and Stepwise Multiple Regression Analysis. The results of this study were as follow: 1) Undergraduate students' knowledge level toward the elderly was low, and undergraduate students' attitudes level was middle. 2) There were meaningful differences in attitudes level according to sex, living together with elderly (the present time), living together with elderly (the past time), the presence of grandfather. It also had a significant correlation to the undergraduate students' knowledge. 3) The variables which affected the undergraduate students' attitudes were knowledge, sex, present co-residency with grandparents, past co-residency with grandparents, the presence grandfather, period of co-residency with grandparents that were explained about $24\%$. Among variables, knowledge of elderly was a very important variable on undergraduate students' attitudes.

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

  • Lee, D.C.;Kim, J.K.;Nam, T.K.;Yu, J.D.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2008.04a
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    • pp.90-95
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    • 2008
  • Medium and high speed marine diesel engines have been widely used as prime mover in small car ferries and fishing vessels with reduction gear. These propulsion shafting system should be installed and matched the elastic coupling between engine and reduction gear to isolate the vibratory torque. In this paper, the elastic dynamic characteristics of coupling with rubber type circular segments is confirmed by the theoretical analysis using the FEM and the hydraulic exciting test at shop. And its adaptation is investigated in the torsional vibration test in factory shop.

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The Effectiveness of Behavioral Skill Training for the Prevention of Child Sexual Abuse (아동성폭력 예방을 위한 행동기술훈련의 효과에 관한 연구)

  • Son, Seung Ah
    • Korean Journal of Child Studies
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    • v.13 no.2
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    • pp.189-201
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    • 1992
  • The purpose of this study was to investigate the effectiveness of teaching personal safety skills for prevention of potential child sexual abuse in Korean society. The subjects of this study were 80 first grade female students, sampled from elementary schools in Seoul. The instruments of this study were the Personal Safety Questionnaire (PSQ) and 'What if' Situations Test (WIST) modified by the present researcher. The t-test and Pearson's correlation coefficient were applied to analyze the data of this study. The results of the analysis were (1) after the Behavioral Skills Training, the children of the training group showed a higher level of knowledge about child sexual abuse than the control group. (2) After the Behavioral Skills Training, the children of the training group showed more adequate self-defensive skills than the control group when they faced situations of possible child sexual abuse. (3) The higher the level of knowledge about child sexual abuse, the more adequate self-defensive skills in situations of child sexual abuse. These results supported the effectiveness of Behavioral Skills Training as preventive education on potential child sexual abuse.

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