• Journal of the Korean Geophysical Society
• /
• v.2 no.3
• /
• pp.225-233
• /
• 1999

Electrical resistivity of a rock-sample is dependant on not only formation factor of rock itself but also many parameters such as fluid type, measuring device, temperature, water saturation, electrical contact between electrode and core section, induced polarization, and frequency of electric source. In this study, we attempt to verify various affecting factors in core resistivity measurements and to find a better environment for core resistivity measurement. Particularly great attention has been paid to understanding the effects of temperature, water saturation, contact condition between sample and electrodes, and frequency of electric source. Precise measurement of resistivity can be achieved by utilizing silver paste for better contacts, taping samples for constant moisture contents, and using time-series resistivity data.

• Nuclear Engineering and Technology
• /
• v.49 no.4
• /
• pp.668-674
• /
• 2017

Experimental verification of boron species in fuel CRUD (Chalk River Unidentified Deposit) would provide essential and important information about the root cause of CRUD-induced power shifts (CIPS). To date, only bonaccordite and elemental boron were reported to exist in fuel CRUD in CIPS-troubled pressurized water reactor (PWR) cores and lithium tetraborate to exist in simulated PWR fuel CRUD from some autoclave tests. We have reevaluated previous analysis of similar threadlike crystals along with examining some similar threadlike crystals from CRUD samples collected from a PWR cycle that had no indications of CIPS. These threadlike crystals have a typical [Ni]/[Fe] atomic ratio of ~2 and similar crystal morphology as the one (bonaccordite) reported previously. In addition to electron diffraction study, we have applied electron energy loss spectroscopy to determine boron content in such a crystal and found a good agreement with that of bonaccordite. Surprisingly, such crystals seem to appear also on corroded surfaces of Alloy 600 that was exposed to simulated PWR primary water with a dissolved hydrogen level of $5mL\;H_2/kg\;H_2O$, but absent when exposed under $75mL\;H_2/kg\;H_2O$ condition. It remains to be verified as to what extent and in which chemical environment this phase would be formed in PWR primary systems.

• Journal of Power Electronics
• /
• v.10 no.6
• /
• pp.604-610
• /
• 2010

Experiments in electrical engineering should mirror the key components of successful research and development: Understand the basic theory needed, test the resulting concepts by simulation and verify these, finally, in the experiment. For optimal learning outcome continuous monitoring of the progress of each individual student is necessary, immediately repeating those subjects which have not been learned successfully. Classically, this is the task of the teacher. In case of remote-controlled experiments this monitoring process and the repetition of subjects should be automated for optimal learning outcome. This paper describes a remote-controlled experiment combining theory, simulation and the experiment itself with an automated monitoring process. Only the evaluation of the experimental results and their comparison to the simulation results has to be checked by a teacher. This paper describes the details of the educational structure for a remote-controlled experiment introducing active filtering of harmonics. For better understanding the content of the learning material (theory and simulation) as well as the results of the experiment and the underlying booking system are shortly presented.

• Journal of Power Electronics
• /
• v.10 no.6
• /
• pp.579-586
• /
• 2010

This paper presents the organisation and the technical structure of a remote controlled laboratory in the field of high dynamic drives and motion control. It is part of the PEMCWebLab project with the goal of providing students with practical experience on real systems in the field of power electronics and drives. The whole project is based on clear targets and leading ideas. A set of experiments can be remotely performed on a real system to stepwise identify a two axes positioning system and to design different cascaded control loops. Each single experiment is defined by its goals, the content of how to achieve them, and a verification of the results as well as the achieved learning outcomes. After a short description of the PEMCWebLab project, the structure of the remote control is presented together with the hardware applied. One important point is error handling as real machines and power electronics are applied. Finally, a selection of experiments is presented to show the graphical user interface and the sequence of the laboratory.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2009.10a
• /
• pp.181-184
• /
• 2009

Authoring AR(augmented-reality) contents not only takes too much time and cost, but also needs the help of professionals in the areas of computer science, VR(virtual reality), AR, 3D computer graphics, computer vision, etc. This paper proposes an authoring tool to allow non-programmers as content creators to author AR contents easily and quickly. An ideal AR authoring tool, which is the goal of our research, faces four major challenges from a technical point of view: (1) easy and quick authoring, (2) strong power of expression, (3) ease of verification and validation, (4) interactive authoring and debugging. To tackle with the challenges, we employ the interactive framework approach using formal and visual specification techniques.

• Journal of Korean Clinical Nursing Research
• /
• v.17 no.1
• /
• pp.70-80
• /
• 2011

Purpose: This study was done to develop performance appraisal guidelines based on the standardized appraisal tool developed in a previous study. Methods: A preliminary investigation was done to draw up a draft guidelines through a literature review. To verify the content validity of the guidelines, 10 nurse managers reviewed the standardized appraisal tool and draft guidelines. Through this process, the performance appraisal guidelines were revised and supplemented. In order to examine the reliability and validity of the guidelines, 13 nurse managers conducted performance appraisal for 178 nurses. Results: As a result, the items of pre-existing tool was reduced from 63 to 30 for usefulness, and guidelines for each items were developed. Conclusion: The revised performance appraisal tool and guidelines are expected to be useful in objectively evaluating nursing performance objectively.

• Journal of the Korea Fashion and Costume Design Association
• /
• v.21 no.3
• /
• pp.55-66
• /
• 2019

The makeup experience service in a theme park was analyzed for the study on the makeup service using experiential marketing based on recent consumer experience. The results of the study showed that the utilization, marketing effect, and lifestyle in makeup service at the Experiential marketing are analyzed. In other words, according to the variables, the purpose of this study is to the effect on the satisfaction, loyalty, and Intent to revisit. In this study, in order to achieve this, literature research and Empirical study on the same time. In literature review, Theories and previous studies were considered which are about experience marketing, lifestyle, makeup service, loyalty, satisfaction, and the intent to revisit. Then, a research model and a hypothesis were established. In empirical study, Based on this, it was applied to the makeup service in a theme park and verified through analysis methods such as frequency analysis, reliability verification, factor analysis, and structural equation modeling. The results showed that experience marketing and lifestyle had a significant influence on satisfaction, loyalty, and return visit intention. Based on this research, the makeup service using experience marketing would be hopefully more practical as a typical culture content marketing.

• Journal of Korean Academy of Fundamentals of Nursing
• /
• v.26 no.1
• /
• pp.12-22
• /
• 2019

Purpose: This study was done to verify the self-directed learning instrument (SDLI) developed to measure self-directed learning ability in nursing students. Methods: The participants for the study were 425 nursing college students. Their self-directed learning was verified using self-reports and results through questionnaires. SDLI was translated into Korean through translation/reverse translation process and its content validity verified by five experts. The validity of the instrument was verified through item analysis, exploratory factor analysis, and confirmatory factor analysis. Reliability verification was analyzed using internal consistency reliability. Results: Four factors were identified through exploratory factor analysis and 20 items of the original instrument were found to be valid. In the confirmatory factor analysis, the validity of the instrument was verified as the model was valid. The internal consistency reliability was also acceptable and SDLI was found to be an applicable instrument. Conclusion: SDLI has been developed and verified by selecting nursing students as participants for the study. Use if SDLI is expected to improve the quality of self-directed learning in nursing education and to be used in future nursing research.

• Korean Journal of Childcare and Education
• /
• v.14 no.6
• /
• pp.143-170
• /
• 2018

Objective: The purpose of this study was to develop assessment indicators and to verify the validity and reliability of the developed assessment indicators. Methods: A Delphi survey, focus group interviews, and content verification were conducted in order for experts to develop an evaluation index of the strengths of the day care center. A main survey was conducted on 438 daycare center principals and teachers to test their item quality, validity and reliability. Results: The final assessment indicators consisted of three areas, seven assessment criteria, 19 evaluation factors, 41 assessment items and a five-point rubric rating scale. As for the common strengths indicators, there were three assessment areas, five assessment criteria, 12 assessment elements and 22 assessment items. In regard to the selective strengths indicators, there were 3 assessment areas, 5 assessment criteria, 12 assessment elements and 16 assessment items. Conclusion/Implications: The efforts to confirm the strengths of daycare centers are expected to facilitate the identity building of the daycare center itself and for its organizational members to make a contribution to the qualitative improvement of childcare.

• The Journal of Economics, Marketing and Management
• /
• v.10 no.6
• /
• pp.47-57
• /
• 2022

Purpose: This study explored the relationship between product characteristics and customer purchase intention in cross-border online shopping. Research design, data, and methodology: Through literature review, the research model of product characteristics and consumers' purchase intention is constructed, and trust is taken as a medium variable. Based on the survey data of Chinese consumers, empirical analysis and hypothesis verification are conducted. This study used SPSS version 21 to confirm the reliability and validity of the research model. To confirm the media effect of the model in this study, the Sobel Test was used. Results: The results of hypothesis identification of this research model showed that 8 of the 11 hypotheses were adopted and 3 were rejected. Results confirmed the relationship between product characteristics (specification, diversity, reputation, novelty, quality) and customer purchase intention. Conclusions: The result from this study had particular theoretical significance for improving the research on cross-border online shopping systems to improve the safety and satisfaction of customers in cross-border online shopping.