• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.6 no.6
• /
• pp.547-554
• /
• 2005

Virtual Laboratory is the new concept in the field of Control & Measurement as network technology development, it is used in many university and institute nowadays. It is possible to control and measure the instrument in anywhere, anytime by the use of Virtual Laboratory and we can raise the efficiency of experiment. In this paper, we review the concept and necessity of Virtual Laboratory at first and discuss about how we can implement Virtual Laboratory. Then we design framework of Client-Server based Virtual Laboratory fur operating of remote instrument through network, and finally we suggest system model of Virtual Laboratory capable of controlling & monitoring of instrument.

• Bulletin of the Korean Space Science Society
• /
• 2011.04a
• /
• pp.30.2-30.2
• /
• 2011

In this report, we present in-orbit radiometric performance prediction for the Amon-Ra (Albedo Monitor and Radiometer) energy channel instrument. The Integrated Ray Tracing (IRT) computational technique uses the ray sets arriving at the Amon-Ra instrument aperture orbiting around the L1 halo orbit. Using this, the variation of flux arriving at the energy channel detector was obtained when the Amon-Ra instrument including the energy channel design observes the Sun and Earth alternately. The flux detectability was verified at the energy channel detector (LME-500-A, InfraTecTM). The detector time response and RMS signal voltage were then derived from the simulated flux variation results. The computation results demonstrate that the designed energy channel optical system satisfies the in-orbit detectability requirement. The technical details of energy channel instrument design, IRT model construction, radiative transfer simulation and output signal computation results are presented together with future development plan.

• Journal of The Korean Association For Science Education
• /
• v.13 no.2
• /
• pp.272-281
• /
• 1993

The purpose of this study was. to develop a valid and reliable Likert-type scale to assess middle school students' attitude toward environmental pollution. The evaluation categories of this instrument were cognition and conaction levels. Initially, 42 statements (29 statements for cognition level and 13 statements for conaction level) were framed. This pilot instrument was administered to 1015 middle school students. To select valid and reliable statements, the 42 initial statements were analyzed by item mean, standard deviation, and response distribution. In addition, the emotional intensity: of each statement was judged. As a result, 22 final statements (14 statements for cognition level and 8 statements for conaction level) were developed. Cronbach alpha coefficient of the instrument was 0.76 with a range of item-total correlation from 0.229 to 0.488. Factor analysis was done to explore the potential constructs of this instrument. As a result, six factors were extracted. Those factors were identified as "Conaction to prevent environmental pollution", "Confrontation with the enterprise which causes environmental pollution", "Voluntary inclination to participate in the group which prevents environmental pollution", "Discussion on environmental pollution", "Environmental pollution and interests", and "Everyday sources of environmental pollution".

• Child Health Nursing Research
• /
• v.21 no.2
• /
• pp.131-140
• /
• 2015

Purpose: The purpose of this study was to develop an instrument that evaluated QUality Of care Through patients' Eyes for hospitalized child (QUOTE-Child), and examine the validity and reliability. Methods: Preliminary items were reviewed through expert content validity and face validity. To test the validity and reliability of the instrument, the data were collected from 221 care givers of hospitalized children. Data were analyzed using exploratory factor analysis, Pearson correlation coefficient, Cronbach's alpha and Spearman-Brown coefficient. Results: Factor analysis yielded 19 items in four factors including 1) respect, 2) explanation, 3) kindness, and 4) skillfulness, with a cumulative explanatory variance of 70.68%. For criterion-related validity, a significant positive relationship was found between quality of care and pediatric family satisfaction. For internal consistency reliability, the Cronbach's ${\alpha}$ was .93 (importance) and .95 (performance) for the overall instrument. The half split reliabilities were .86, .95 (importance) and .92, .97 (performance). The Cronbach's ${\alpha}$ of 110 data was .92 (importance) and .94 (performance). Conclusion: Researchers and practitioners can use this instrument to systematically assess quality of care for hospitalized children and identify areas of support for hospitalized children and their family.

• Women's Health Nursing
• /
• v.16 no.4
• /
• pp.370-380
• /
• 2010

Purpose: The purpose of this study was to develop an uncertainty scale for infertile women. Methods: The process included construction of a conceptual framework, generation of 12items, verification of content validity, selection of secondary items, verification of construct validity and extraction of final items. In order to verify the reliability and validity of the preliminary instrument, data were collected from 50 infertile women in an In Vitro Fertilization (IVF) clinic. Data were analyzed by item analysis, Varimax factor analysis and Cronbach's alpha. Results: There were 10 items in the final instrument categorized into 2 factors labeled as "personal (6 items)" and "relational (4 items)" The total variance explained was 73.36%. The instrument was shown to have good reliability with a Cronbach's alpha of .899. Conclusion: Validity and reliability of the scale were confirmed in this study showing its utility to measure uncertainty for infertile women. The instrument can help understand sterility and accurately measure uncertainty for infertile women. The instrument can also be used to evaluate nursing interventions designed for mitigating uncertainty for infertile women.

• Korean Journal of Adult Nursing
• /
• v.14 no.3
• /
• pp.401-410
• /
• 2002

Purpose: This research was designed to develop an instrument that can be used for measuring of the quality of life for the elderly in Korea. Method: Subjects were 2,110 aged people, residing in Seoul and Kyeungi-Do. In developing this instrument, the researcher first established a conceptual framework based on the literature review and interview and open questionnaire. The collected data were analyzed using the SPSS-WIN program. For the component factors of the measuring instrument, a factor analysis method and item analysis was used. The reliability of the scale was tested by Cronbach's alpha. Result: 1) The results of the analysis of the 32 items making up the instrument were classified into the following 4 factors: life stability, easy of resource utility, health and affection in family, establishment of supportbase. 2) The reliability of the instrument for the quality of life was 0.952 (Cronbach's alpha). In the factor analysis Cronbach's alpha correlations for the 4 factors ranged from 0.736 to 0.949. Conclusion: This scale could be adequately applied in assessing the quality of life for the elderly in Korea. And the results of this scale in a study can contribute to the promotion of quality of life for the elderly.

• Hwankyungkyoyuk
• /
• v.19 no.3
• /
• pp.138-149
• /
• 2006

The purpose of this study was to develop the environmental sensitivity(ES) measurement instrument and to apply for middle school students. The questionnaire was developed to evaluate ES. The developed questionnaire consists of 15 items in 5 categories. Each item of the instrument was developed through the conceptional analysis of the definition of ES. The 5 categories included natural environment, activity at natural environment, artificial environment, environmental pollution, environmental destruction. Data for this study were collected from 397 middle school students including 46 environmental class and 351 non-environmental class students. It was found that the developed instrument to measure ES was valid and reliable. Reliability coefficient, Cronbach $\alpha$ was 0.75. Using the developed instrument of ES, the ES was measured for the students of experimental group to which a inqury-based EE model was applied. The result was that the effect of ES of the students of the experimental group was not statistically significant. Futher research is needed related to the EE model based on the inquiry learning model and measurement of environmental sensitivity.

• Proceedings of the KIPE Conference
• /
• 2019.11a
• /
• pp.216-217
• /
• 2019

The battery powered electric vehicle (EV) is one of most promising technologies in 21^st century. Though the lithium batteries are playing an important role in the EVs, they are only applicable until their capacities reach 80%, the end of its useful first life. Yet, these batteries can live a second life such as Energy Storage Systems (ESS). In order to utilize the Residual Useful Life (RUL) of the batteries the State of Health (SOH) of them needs to be estimated by a nondestructive test such as Electrochemical Impedance Spectroscopy (EIS) technique. Though many kinds of different EIS instruments are commercially available, most of them can only test a battery module less than 10V and the price of the instrument is very high. In this paper a low-cost EIS instrument suitable for measuring the impedance spectrum of the high voltage battery module is proposed and its validity is verified through the experiments. In order to prove the accuracy of the developed EIS instrument its measured impedance spectrum is compared with the results obtained by a commercial instrument. The Chi Square value calculated between two impedance spectrum measured by both developed and commercial instruments are less than 2%, which prove the strong correlation between two results.

• Journal of Korean Clinical Nursing Research
• /
• v.14 no.1
• /
• pp.139-150
• /
• 2008

Purpose: The aim of this study was to develop instrument measuring the relocation stress syndrome for patients transferred from intensive care unit to general ward in Korea. Method: For item construction, components were drawn from an extensive review of the literature, existing instruments and the result of qualitative approach. A total 48 items were selected for the first draft. Ten experts evaluated this instrument for content validity and the number of items was reduced to 29. To refine and test reliability and validity of the instrument, data were collected from the 594 patients following transfer from intensive care unit. Results: Preliminarily twenty-nine items were generated through content validity and a pilot study. Using corrected items to total correlation coefficient, this instrument was further shortened to a 25 item scale. Factor analysis extracted a total of 23 items with a 5-point Likert-type scale. Relocation Stress Syndrome (RSS) included three subscales; physical factors (12 items), Patient's recognition to health care providers (8 items), and emotional factors (3 items). The RSS established content validity, construct validity, and reliability. Conclusion: This instrument demonstrates good reliability and validity, and therefore it is an appropriate measurement of assessing relocation stress syndrome in ICU to ward transition period.

• Research in Community and Public Health Nursing
• /
• v.30 no.1
• /
• pp.25-37
• /
• 2019

Purpose: The purpose of this study was to develop an instrument for measuring nursing information literacy competency, and then to examine the validity and reliability of the instrument. Methods: The developmental process of the instrument includes construction of a conceptual framework, generation of initial items, verification of content validity, preliminary study, extraction of final items, and psychometric testing. Its content validity was verified by three experts from nursing and nursing informatics. Its construct, convergent, and discriminant validity was examined in confirmatory factor analysis. Finally, its criterion validity was measured with Pearson's correlation. The tool's reliability was examined by Cronbach's ${\alpha}$. The participants include 382 nurses from four hospitals and one university hospital. Results: Twenty seven items in total were selected for the final scale, and the results of the confirmatory factor analysis were supported with acceptable model fit, which were named competency for identifying problem, potential sources for information, searching fine information, evaluating information, acquising and managing of information, using information ethically, and integrating new information. The convergent, discriminant and criterion validities were also supported. The Cronbach's ${\alpha}$ coefficient was .93. Conclusion: The instrument is valid and reliable to comprehensively assess nurses' information literacy competency, and to provide a basic direction for developing nursing information literacy program.