• Journal of the Ergonomics Society of Korea
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• v.19 no.2
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• pp.33-45
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• 2000

Present study was performed to compare different types of teleoperation performance measures. A modified Cooper-Harper rating scale and a distance measure were newly introduced and compared to two traditional measures, the error rate and time-to-completion. Participants performed a simulated telerobotic task with varying visual display interfaces. The results of correlation analyses revealed that the modified Cooper-Harper ratings had a close association with the error rate measure. The distance measure also appeared to be a consistent performance measure, which accounted for both the error rate and time-to-completion. A further analysis, however, showed that the effectiveness of each performance measure varied with the level of task difficulty. The results imply that the choice of performance measure should be made based on the task difficulty as well as the particular task being studied. The results revealed here also have implication for performance measures of various display and control systems including aircraft navigation displays and tactical displays.

• Proceedings of the Korean Statistical Society Conference
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• 2003.10a
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• pp.123-130
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• 2003

We define a broad class of rotation designs whose monthly sample is balanced in interview time, level of recall, and rotation group, and whose rotation scheme is time-invariant. The necessary and sufficient conditions are obtained for such designs. Using these conditions, we derive a minimum variance unbiased generalized composite estimator (MVUGCE). To examine the existence of time-in-sample bias and recall bias, we also propose unbiased estimators and their variances. Numerical examples investigate the impacts of design gap, non-sampling error sources, and two types of correlations on the variance of MVUGCE.

• East Asian mathematical journal
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• v.30 no.4
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• pp.493-507
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• 2014

The purpose of this thesis is to understand the relationship between the College Scholastic Ability Test(CSAT) and the Mathematics Level Assessment(MLA) which is conducted in P University. There are high correlations in grades, subject areas and college entrance types between grades of mathematics B-type of the CSAT and scores of the MLA. However, the many students showed substantial differences between the grades in the two tests. On the basis of these analysis results, we suggest plans for improving the implementation of the MLA and the teaching-learning methods about College General Mathematics.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1996.06a
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• pp.33-38
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• 1996

A multi-media binary DS/CDMA system with variable processing gain and coherent correlation receivers are considered under additive white Gaussian noise channels. Two types of information sources with different rates and transmitting powers are assumed to be transmitted simultaneously in the same channel. Average signal-to-noise ratios at the correlation receiver outputs for each type of information sources are analytically derived as functions of discrete partial cross-correlations between spreading code sequences. The analysis is expected to provide analytical tools for use in preliminary system design and spreading code selection.

• International Journal of Advanced Culture Technology
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• v.3 no.2
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• pp.124-131
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• 2015

Computational fluid dynamics (CFD) has been employed for the Heat exchanger efficiency of a counter flow heat exchanger. The Heat exchanger efficiency has been assessed by considering the computed Nusselt number and flow friction characteristics in the double pipes heat exchanger equipped with two types twisted-tapes: (1) single clockwise direction and (2) alternate clockwise and counterclockwise direction. Cold and hot water are used as working fluids in shell and tube side, respectively. Hot and cold water inlet mass flow rates ranging are between 0.04 and 0.25 kg/s, and 0.166 kg/s, respectively. The inlet hot and cold water temperatures are 54 and $30^{\circ}C$, respectively. The results obtained from the tube with twisted-tapes insert are compared with plain tube. Nusselt number and friction factor obtained by CFD simulations were compared with correlations available in the literature. The numerical results were found in good agreement with the results reported in literature.

• Speech Sciences
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• v.13 no.2
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• pp.35-46
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• 2006

This study investigated whether there are differences between Korean-English bilingual and Korean monolingual children on phonological awareness skills. Participants were 11 Korean-English bilingual children and 12 Korean monolingual children. The children's ages ranged between 6 and 7 years. The results were as follows. First, the bilingual children significantly outperformed monolingual children on overall phonological awareness tasks. The bilinguals performed significantly higher than monolinguals on all three types of phonological awareness tasks (segmentation, deletion, and blending). Second, there was a significant difference between the groups with respect to phonological units of the tasks. The bilinguals performed significantly better than monolinguals on the phonemic unit tasks, but two groups did not differ significantly on syllabic unit tasks. There was an interaction effect between unit size(syllables and phonemes) and group (bilinguals and monolinguals). Third, there were correlations for both bilingual and monolingual children between overall phonological awareness skills and word recognition skills.

• Quality Improvement in Health Care
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• v.4 no.2
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• pp.260-278
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• 1997

Background : Quality of professional nursing care is the most essential factor for survival and growth of nursing profession. Then, nursing professionals have responsibility for the evaluation of quality of professional nursing care. The purpose of this study was to develope an evaluation tool of nursing care for patients received gastrointestinal surgery with general anesthesia. This study was a primary work for the developement of a computer program for the evaluation of nursing care. Methods : This study was done through some consecutive steps. They were (1) Developement of items for the tool (2) Developement of an evaluation tool of nursing care quality for the G-I surgery patient (3) Test of reliability and validity of the tool. Two groups of experts and expert pannels who had much experience of the QA and the care of G-I surgery patients participated for developement of the items. 85 nursing records were used for the test of reliability and validity of the developed tool. The evaluation tools were developed with two types of scoring, norm-referenced tool and criterion-referenced tool. Results The system of items for tool was evaluation area evaluation item-indicator. There were 7evaluation areas which contained 32evaluation items which contained 7lindicators. Evaluation areas 1, 2, 3, 4 were for the evaluation of process and 5, 6, 7 were for the evaluation of outcome of nursing care for G-I surgery patient. For the test of interrator reliability, correlation coefficients of each scores of items and intragroup correlation coefficients were calculated. The average correlation coefficients between two rators were 0.65, 0.54 and the intragroup correlation coefficient were 0.99 and 1.00 by the types of scoring. The Cronbach alpha coefficients of the tools were 0.54 and 0.46 by the types of scoring. The average content validity index of the items was 0.95 from 4 pairs of experts. Because there were significant differences between some scores of quality of nursing care of 3 general hospitals regardless of the types of scoring, the tools could be thought to have some construct validity. And also, there were significant correlations between some scores of quality of nursing care and admission days and admission days after surgery regardless of the types of scoring, the tools could be thought to have predictive validity. Conclusion In this study, the evaluation tool of nursing care was developed for the very specified group of patient, G-I surgery patient. And the items were developed and tested by the experts of nursing practice. Because of these reasons, it was supposed that the tool could be used effectively in nursing pratice. And the procedures for the development and the test of the evaluation tool of nursing care in this study were supposed to be used for the developement of other tools.

• Journal of the Korean Society of Clothing and Textiles
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• v.40 no.4
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• pp.733-745
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• 2016

This study investigated the effect of clothing interest on party preference and suggested four party unities according to party wear types. A hypothesized model based on consumer innovativeness, clothing interest, party benefit, party interest and party preference was tested to determine the effect of clothing interest on party preference. Party unities were constructed according to party wear types along with party place, party food, and party music. Data was collected through two online surveys. The population of the survey was female consumers in their twenties. Descriptive statistics, factor analysis, reliability, correlations, and regressions were applied to the data of 305 samples. As a result, positive tendency toward consumer innovativeness, clothing interest, party benefit, party interest and party preference was observed in young female consumers with significant relations among five variables. Party preference was well-explained from the hypothesized research model, but the direct path from clothing interest to party interest was identified as insignificant. The most preferred party elements of place, food, music and wear was garden, barbecue, house music and mini dress, respectively. Four party unities according to party wear types were constructed and suggested based on the correlation analysis results between party wear and other party elements. The concept of party unity is useful to establish marketing strategies such as advertising and experience marketing in the party wear industry.

• Journal of East-West Nursing Research
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• v.7 no.1
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• pp.68-81
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• 2002

The purpose of this study is to analyze the type of ego states and stress coping style on female college students who are in the course of nursing study. This study is performed in the view of Transactional Analysis and designed to scrutinize descriptive correlations between the type of ego states and stress coping style. The subject is consists of 144 freshmen and sophomore, 138 junior and senior students group, who are students of K nursing college located in Seoul. The sampling investigation period is on Sept. 14, 2002 to Oct. 26, 2002. The measuring instrument used for Transactional Analysis ego state is 50 items Ego-gram research paper devised by Dusay(1997). For studying coping style, Folkman & Lazarus's measurement(1984) was adopted, which is translated and modified by Han, and Oh,(1990). Health states is adopted by standardized health inspecting instrumental table (Cornell Medical Index:CMI) which is designed for Korean people by Ko and Park(1980) Statistic average and standard deviation were generated by using SPSS PC+, t=test and Pearson correlation. The results were as follows: 1) In the type of ego states on both groups indicated the arithmetic apex NP(maximum value), then the point A was high and the data made a down slope to point AC. In the comparison to type of ego states between two groups, only at point CP, the data value of upper year students represented higher than that of lower year ones by c(t=2.28, p=.023). 2) Stress coping style of whole students were highly and affirmatively dedicated to research. Especially hopeful aspect(t=.67, p=.05), relaxation of tension(t=-2.16, p=.03) made significant difference each other in the view of arithmetic calculation. 3) In view of nursing students' physical health states, there is significant difference in past history(t=2.50, p=.013) and in case of mental health states, there are considerable discrepancies between lower group(73.52) and upper group(75.11)(p<.05). In view of all field, state of tension(t=2.13, p=.048) has difference. 4) While verifying coping style in terms of ego states level between lower and upper students group, In type CP, high level ego states group indicated significant difference on stress coping style area than low leveled group and made such sequences as the central point of problem, In type NP, sequences such as the central point of problem, In type A, the central point of problem, In type FC, hopeful aspect and In type AC, hopeful aspect and indifference were derived significantly different (p<.05). 5) While verifying health state differences in the level of lower and upper ego states, In type FC, low level group(150.29) marked higher point than upper group(145.19), there is remarkable discrepancy and so did whole health state(p=.014), In type AC both mental state(p=.000) and whole health state (p=.015) showed differences. 6) When analyzing correlations between whole students' ego states, copying style and health state, all type of ego state showed differences(p<.001). In correlations between ego state and health state, in type FC physical state had an apex and there are inverse correlations among the other types. Especially, type FC showed inverse correlations with great discrepancies(p<.05). In mental state, type NP(${\gamma}=.198$, p<.001) and type A(${\gamma}=.166$, p<.05) represented straight correlations with remarkable differences. Especially, In type AC showed inverse correlations(${\gamma}=.282$, p<.001). In case of correlations between copying style and health state, indifference(${\gamma}=-.157$) and relaxation of tension(${\gamma}=-.158$) presented great difference(p<.05). In mental state, central point of problem and search for social support showed straight correlations with great discrepancies(p<.05), hopeful aspect and indifference showed inverse correlations with considerable differences(p<.001).

• Korea Journal of Hospital Management
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• v.4 no.2
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• pp.242-265
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• 1999

Our study attempt is to see organizational performance according to the differences between types of hospital cultures. To determine theoretical relationship between the organizational culture and the performance, we select two hospitals in Pusan which are different in the purposes and shapes of establishment. We surveyed their members on a questionnaire based on the type of the organizational culture of the two institutions, analyzed, and review its organizational effectiveness. For the survey with questionnaires, which had been preliminary studied to raise its validity, question forms were distributed to 528 persons in April, 1999 based on the self-responses and recollected within 48 hours. The recollection rate was high(89.96%) and the quantity of questionnaires used for our final analysis was 430(81.44%). The Cronbach Coefficient Alpha of the questionnaires was 0.742. Regarding statistical techniques for analysis of the written materials, dispersion analysis(ANOVA) was adapted to test the organizational effectiveness of the two hospitals having the different organizational cultures, and Pearson Correlation was applied to determine correlations was among all variables. T-test was performed to test organizational effectiveness based on the differences in the extent of sharing the culture, organizational committment and work satisfaction between the two health institutions. From our analysis, we obtain the following conclusions. First, concerning with organizational culture of the two hospital, one of which is a christian hospital and the other is a private foundation hospital, the former is conservative and human-oriented but the latter focuses on renovation and accomplishment. Second, the private establishment has a relatively higher organizational effectiveness that the religious hospital as a result of analyzing the extent of sharing culture, organizational committment and work satisfaction. Third, it has been found that the correlations between the extent of the sharing culture and the organizational committment, the extent and work satisfaction, and the committment and the satisfaction are respectively positive influencing organizational effectiveness, especially work satisfaction. Fourth, cultural factors by which the christian hospital is affected more positively including human relations among its members, belief, its idea of establishment, tradition, work responsibility, power, and wage. On the other hand, factors such as director's leadership, personnel management, wage, hospital regulations and department managers' management ability have been seen as negative influences in order. And fifth, for the private foundation hospital human relations among its members, wages, work responsibility, director's leadership and department managers' management ability were positive in their sequence while wages, personnel management, hospital regulations, welfare and department managers' management ability were considered as negative influences in order. As these results of this study, the higher extent of sharing organizational culture, the more increasing in both organization committment and work satisfaction, the higher the effectiveness. Although it was somewhat difficult to generalize the results whose subjects were the two hospitals only, it was obvious that organizational culture was an important influential factor of organizational effectiveness. It is questionable that the extent of sharing organizational culture, organizational committment and work satisfaction as variables affecting the effectiveness have their validity, but this study has its significance in that it provided an approaching to evaluate the organizational culture of individual hospitals making allowances for such variables related to the general activities in its hospital. We hope the results of the study could be useful for the managerial strategies of the institutions.