• Title/Summary/Keyword: Tool life

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Developing a Measurement Tool for Student Satisfaction in Higher Education (대학교육 학생만족도 측정도구 개발 연구)

  • Min, Sang Hee;Sohn, Aeree;Jang, Sarang
    • The Journal of the Korea Contents Association
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    • v.20 no.10
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    • pp.338-352
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    • 2020
  • This study identified essential areas of student satisfaction by presenting questions concerning each educational area. The measurement tool of this study was developed based on a literature review, and its validity and reliability were verified through qualitative research and exploratory and confirmatory factor analysis. To measure student satisfaction in university, we developed a tool comprising seven areas: curriculum and instruction; student advising, educational environment, student support, campus life, university image, and administrative services. A total of 54 questions were prepared, and 7 factors were derived. Cronbach's alpha was 0.970 for all questions and ranged from 0.70 to 0.93 for each factor. The results of the confirmatory factor analysis were GFI 0.830, CFI 0.916, TLI 0.910, RMR 0.047, and RMSEA 0.047, which confirmed the suitability of the research model. Moreover, the convergent validity showed that the questions in this tool consistently described the component areas. Therefore, the research tools developed in this study were found to be suitable for measuring student satisfaction.

A study on the Cutting Force Variation Comparison between Low CBN and Coated Low CBN Tools in Turning of SCM440 (Low CBN 코팅공구의 SCM440 선삭시 절삭력변화에 관한 연구)

  • Bang, Hong-In;Kim, Tea-Young;Oh, Sung-Hoon
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.12 no.1
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    • pp.9-14
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    • 2013
  • In recent years, high hardness steel is used for most of the material in many areas including aircraft, nuclear power, space exploration and automotive parts. Low CBN tools are widely used in industrial field which can effectively process high hardness steel of HRC 45 or harder. The results of this study demonstrated, when high hardness steel, SCM440 is turned with Low CBN tools coated with TiN and TiAlN coatings respectively, that both the thrust force and cutting force tends to increase with more increase in cutting force than thrust force, as the feed rate increases at constant cutting speed. In addition, the size of the cutting force and thrust force does not change with the increased cutting speed at the same feed rate, but the tool life is reduced if the cutting speed is increased to shorten the machining time. Therefore, it is recommended to limit the cutting speed at 250 m/min maximum or less. Furthermore, comparing the cutting force of the three tools at the same cutting condition, Tin coating tool showed the smallest cutting force and Low CBN was the next, and the TiAlN coating tools showed the largest cutting force.

A Study on Web Services for Sequence Similarity search in the Workflow Environment (워크플로우 환경에서의 대규모 서열 유사성 검색 웹 서비스에 관한 연구)

  • Jun, Jin-Young
    • Journal of the Korea Society of Computer and Information
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    • v.13 no.6
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    • pp.41-49
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    • 2008
  • In recent years, a life phenomenon using a workflow management tool in bioinformatics has been actively researched. Workflow management tool is the base which enables researchers to collaborate through the re-use and sharing of service, and a variety of workflow management tools including MyGrid project's Taverna, Kepler and BioWMS have been developed and used as the open source. This workflow management tool can model and automate different services in spatially-distant area in one working space based on the web service technology. Many tools and databases used in the bioinformatics are provided in the web services form and are used in the workflow management tool. In such the situation, the web services development and stable service offering for a sequence similarity search which is basically used in the bioinformatics can be essential in the bioinformatics field. In this paper, the similarity retrieval speed of biology sequence data was improved based on a Linux cluster, and the sequence similarity retrieval could be done for a short time by linking with the workflow management tool through developing it in the web services.

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A Study on the End Mill Wear Detection by the Analysis of Acoustic Frequency for the Cutting Sound(KSD3753) (합금공구강재의 절삭음 음향주파수 분석에 의한 엔드밀 마모 검출에 관한 연구)

  • Lee Chang-Hee;Kim Nag-Cheol
    • Journal of the Institute of Convergence Signal Processing
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    • v.5 no.4
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    • pp.281-286
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    • 2004
  • The wear process of end mill is a so complicated process that a more reliable technique is required for the monitoring and controling the tool life and its performance. This research presents a new tool wear monitoring method based on the sound signal generated on the machining. The experiment carried out continuous-side-milling for using the high-speed steel end mill under wet condition. The sound pressure was measured at 0.5m from the cutting zone by a dynamic microphone, and was analyzed at frequency domain. The tooth passing frequency appears as a harmonics form, and end mill wear is related with the first harmonic. It can be concluded from the result that the tool wear is correlate with the intensity of the measured sound at tooth passing frequency estimation of end mill wear using sound is possible through frequency analysis at tooth passing frequency under the given circumstances.

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Development of a Tool to Measure Childcare Teachers' Safety Practice care Behavior (보육교사의 안전돌봄 실천행위 측정 도구 개발)

  • Jeong-Hyeon Kong;Eun-Young Jung;Bang-Guel Heo;Sol Heo;Ji-Hye Seo;Sung-Mo Moon;Hyun-Ye Lee;Ju-Young Hong;Se-Ru Kim
    • Journal of the Health Care and Life Science
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    • v.10 no.2
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    • pp.369-377
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    • 2022
  • The purpose of this study was to develop safety care practice measurement tool for childcare teachers. The tool for this study was developed and validated according to DeVellis' scale development process. The construct validity of the instrument was analyzed by major analysis of Varimax rotation, and the internal inertia was verified by Cronbach's α. The final scale was a 4-point scale, consisting of 22 items in 7 domains. The total explanation was 59.32% and the Cronbach's α was .80. Therefore, it is judged that the tool developed in this study is a useful tool to measure the level of safety practice care behavior of childcare teachers.

Advanced development of the core competency diagnosis tool for college students for future-oriented competency education: Focusing on the case of Y University (미래지향적 역량교육을 위한 전문대학생 핵심역량 진단 도구 고도화 개발: Y대학 사례를 중심으로)

  • Hyo-Jung Gil;Boc-Nam Park;Jong-Il Ahn
    • Journal of the Health Care and Life Science
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    • v.10 no.1
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    • pp.69-80
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    • 2022
  • The purpose of this study is to advanced and develop a core competency diagnosis tool that junior college students must have in order to implement competency-oriented education to nurture talents required by the future society, and to verify its validity and reliability. To this end, the existing diagnostic tools were analyzed and preliminary questions were derived through analysis of prior research, collecting opinions of members, FGI, and expert advice. A total of 46 items were derived, which were verified as content validity. Afterwards, a preliminary survey was conducted targeting 380 applicants among current students. To verify the validity of the construct, an exploratory factor analysis was performed using AMOS 18.0. As a result, 30 final questions composed of 6 core competencies were derived. The core competency diagnosis tool is expected to be actively used as a future-oriented competency education execution, evaluation, and quality management tool by diagnosing the competencies of current students.

The Correlation Among Health Status, Burden and Quality of Life of the Adult Stroke Patient's Family and the Elderly Stroke Patient's Family (노인층과 청·장년층 뇌졸중 환자가족의 건강상태·부담감 및 삶의 질과의 관계)

  • Kim, Kwuy-Bun;Lee, Kyung-Ho
    • Korean Journal of Adult Nursing
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    • v.13 no.2
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    • pp.262-276
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    • 2001
  • The purpose of this study is to investigate the correlation among the stroke patient family's health, burden and quality of life which is based upon the comparative appreciation of the adult stroke patient's family and elderly stroke patient's family. For this purpose, data were collected from the family care-givers for two groups of stroke patients under sixty years old and over sixty years of age, admitted at K Hospital and H Hospital in Seoul. The instruments for this research are based on the tool for measuring physical health and psychological health developed by Yang, Young-hee(1992), the tool for measuring the sense of burden by Seo, Mee-hae and Oh, Ga-sil(1993), and the tool for the quality of life by Noh, Yoo-ja(1988). The sampling for this study was done from December, 2000 until February, 2001. Questionnaire data were drawn up by personal interviews aided by the staff nurses. The analysis of collected data are based on general characteristics calculated at the rate of 100 percent of the average, t-test, ANOVA(some difference on a level with p<.05 being subsquently confirmed by DMR) for Health Status, Burden, Quality of Life and Pearson Correlation to verify the hypothetical correlation among the subjects. The results of this study are as follows: 1. In the adult stroke patient family, the factors influencing the physical health proved to be age, present occupation and family-formation. Here, the factors influencing psychological health turned out to be age, matrimonial status, present occupation and family-formation. In the elderly stroke patient family, the factors influencing physical health proved to be age, gender, final academic status, matrimonial status, present occupation, and relation with the patient. Here, the factors influencing the psychological health were age, final academic status, matrimonial status, present occupation, relation with the patient and family-formation. In the former case, the influencing factors upon the burden were shown to be age, final academic status, matrimonial status, relation with the patient and family-formation. In the latter case, the influences upon the burden were age, gender, final academic status, matrimonial status, present occupation and relation with the patient. In the former case, the influences on the quality of life were gender, and economic situation. In the later case, the influencing factors on the quality of life were age, final academic status, matrimonial status, present occupation, and relation with the patient. 2. The rate of the physical condition in the former case turned out to be 2.83, and the psychological condition 2.37. The physical condition of the latter case was 2.76, and the psychological condition 2.46. The rate of the burden in the former case was 3.14, and that of the latter case was 3.04. The rate of quality of life in the former case proved to be 2.46, and that of the latter case 2.55. 3. The rate of correlation between the burden and the quality of life appeared to be the high counter-correlation (r= -.573). The rate of correlation between the psychological health and the burden of a simialr (r= -.565). The rate of correlation between the physical health and the psychological health proved to be a moderate correlation (r= .372), The rate of correlation between physical health and the burden turned out to be a low counter-correlation (r= -.276). According to this study, there proved to be a very close correlation among the stroke patient family's health, the burden and quality of life. Thus, it would be necessary to find out various nursing interventions in order to mitigate the stroke patient family's burden in the process of caring for the patients.

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Effects of the Sex Education Program on Elders' Sex Perception and Life Satisfaction (성교육 프로그램이 노인의 성인식과 삶의 만족도에 미치는 영향)

  • Park, Gong-Ju;Jung, Hyang-Mi
    • The Korean Journal of Health Service Management
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    • v.8 no.3
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    • pp.181-192
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    • 2014
  • The purpose of this study was to evaluate the effect of a sex education program on the aged's sex perception and the life satisfaction. It was the non-equivalent control group pre-post test design, the number of subjects was 65 people as the experimental group and 70 people as the control group over 65 the aged. The program was conducted for 80 minutes a time for 6times of the N settlement house in P city from August 25 to September 16 in 2011. The study tool which was developed by Lee(1999) and revised by Jeong(2007), was used to measure the sex perception. The life satisfaction was measured by Naugarten(1961) and modified by Kim(2002). The date were analyzed as SPSS Win 17.0, the percentage, t-test, and the hypothesis was analyzed as t-test. The experimental group got higher scores on the sexual percetion(t=3.816, p<.001) and the life satisfaction(t=4.594, p<.001). This program is for generalized that must be performed in a repeat and comprehensive study with the many aged.

Impact of Life Style Characteristics on Prevalence Risk of Metabolic Syndrome (생활습관 요인이 대사증후군 유병 위험에 미치는 영향)

  • Yoo, Ji-Soo;Jeong, Jeong-In;Park, Chang-Gi;Kang, Se-Won;Ahn, Jeong-Ah
    • Journal of Korean Academy of Nursing
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    • v.39 no.4
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    • pp.594-601
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    • 2009
  • Purpose: The goal of this study was to evaluate the impact of life style characteristics on the prevalence risk of metabolic syndrome (MS). Methods: A total of 581 adults were recruited from a cardiovascular outpatient clinic. A newly developed comprehensive life style evaluation tool for MS patients was used, and patient data related to the MS diagnosis were reviewed from the hospital records. Results: The overall prevalence of MS was 53.2%, and the mean of MS score was 2.6 for patients at a cardiovascular outpatient clinic (78% of the patients had hypertension). Dietary habits among the life style characteristics had significant influence on the prevalence risk of MS and MS scores. And also interestingly, the classification and regression tree (CART) model suggested that the high prevalence risk groups for MS were older adults (61.5$\leq$age<79.4), and adults between 48.5 and 61.5 yr of age with bad dietary habits. Conclusion: This study indicates that nurses should focus on dietary habits of patients (especially patients classified as high prevalence risk for MS) for improvement and prevention of MS prevalence risk.

A Study on the Reliability Analysis for the High Precision Pneumatic Actuator within Tape Feeder (테이프 피더 내장 공압 액추에이터에 대한 신뢰성 평가에 관한 연구)

  • Choi Jin-Hwa;Jeon Byung-Cheol;Cho Myeong-Woo;Kang Sung-Min;Lee Soo-Jin
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.15 no.4
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    • pp.63-68
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    • 2006
  • This research presents the reliability analysis of the pneumatic actuator within the tape feeder that is used to transfer the correct force to linked parts during l.0E+7 cycles. First, the degradation analysis for thrust and air leakage is executed to obtain the failure data of a product based on its performance over time. Second, once the parameters has been calculated using the weibull 2-parameter distribution and MLE(Maximum Likelihood Estimation), information related to life such as reliability, failure rate, probability density function is estimated. Finally, MTTF(Mean Time To Failure) and $B_{10}$ life of actuators are calculated. MTTF means the mean life at the confidence level and $B_{10}$ life refers to the time by which 10% of the product would fail. In this study, failure causes and solutions are examined using the reliability analysis.