• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.1352-1357
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• 2011

Heights of a platform above the rail for the passenger train in the country are classified into two categories such as the low level (500mm; mainline) and the high level (1,135mm; metropolitan subway line) platforms. In order to operate similarly both a mainline railroad and a metropolitan subway line, as the requisite door safety system, it is necessary to develop the doorstep equipment of the rolling stock regardless of both the low and high level platforms. In this study, the application of doorstep equipments to use mixed with two types of platforms are examined on the supposition that the train only for the low level platform stops in the both low and high level platforms.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.484-489
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• 2011

Heights of a platform above the rail for the passenger train in the country are classified into two categories such as the low level (500mm; mainline) and the high level (1,135mm; metropolitan subway line) platforms. In order to operate similarly both a mainline railroad and a metropolitan subway line, as the requisite door safety system, it is necessary to develop the doorstep equipment of the rolling stock regardless of both the low and high level platforms. In this study, performance requirements of doorstep equipments used for two types of platforms are examined on the supposition that the train only for the low level platform could stop in the both low and high level platforms.

• 보건교육건강증진학회지
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• 제24권1호
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• pp.17-28
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• 2007

Objective: To find the relevant stress factors of male and female employees. Method: The survey was collected from April 7th to May 10th in 2006 by formalized questionnaires targeted on male and female employees. The research used both quota sampling and accidental sampling to collect the data. Results: 1) It was found that relevant factors are related with ages in general traits for male employees and associated with ages, marital status and education level in general traits for female employees. In other words, age is the primary factor for both male and female employees at age 20s, and as the marital status is single and the education level is lower, the stress level is higher for female employees. 2) Occupation is the main relevant stress factor for male employees in employment traits and the period of employment, working hour and wages are relevant stress factors to the level of stress for female employees. That is to say, manufacture related job shows higher level of stress than other jobs for both male and female employees. As period of employment and working hour is shorter and wages are less, it appears to be high stress level for female employees. 3) It presents that stress level is decided based on if he exercises regularly or keeps regular hours for male employees in lifestyle aspect and it also shows drinking is an additional relevant stress factor to conclude the level of stress for female employees. So to speak, as the regular exercise is performed and regular hours are kept, it comes out low level of stress for both. In addition, it shows lower stress level from the group of female employees who do not drink than the other. Conclusion: The research is summarized that no matter what gender you are, both male and female employees should try to have a positive lifestyle. Specially, the research concludes that the regular exercise is the best way to get rid of stress.

• 말소리와 음성과학
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• 제6권4호
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• pp.67-77
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• 2014

This study investigated (1) whether Korean learners of English use discourse-level prosody in L2 production as native speakers of English do, and (2) whether discourse-level prosody is also found in the Korean language, as is evident in the prosody of native speakers of English. The study compared the production of the same 15 sentences in two types of reading materials, sentence-level and discourse-level. This study analyzed the onset pitch, sentence mean pitch and pause length to examine the paratone (intonational paragraph) realization in discourse-level speech. The results showed that in L2 discourse-level prosody, the Korean speakers were limited in displaying paratone and did not made significant difference between sentence-level and discourse-level prosody. On the other hand, in L1 discourse-level text, both English and Korean participants demonstrated paratone using pitch. However, there were differences in using prosodic cues between two groups. In using pauses, the ES group paused longer before both the orthographically marked and not marked topic sentences. The KS group paused longer only before the orthographically marked topic sentence in both L1 and L2 text reading. In the comparison of sentence-level and discourse-level prosody, the topic sentences were marked by different prosodic cues. English participants used higher sentence mean pitch, and the Korean participants used higher onset pitch.

• 한국식생활문화학회지
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• 제3권1호
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• pp.67-76
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• 1988

With a view to making comparative study and promoting the interchange of food culture between Korea and Japan, a sensory test was given to 60 female college students (30 Koreans and as many Japanese) in order to find out differences in preference of various teas between the two nations. The findings are as follows: 1. The correlation between each specific tea and total evaluation: Significant level of high positive correlation was indicated in case of color, taste, and aftertaste by both Koreans and Japanese. In case of odor, and flavor the Koreans indicated insignificant level of nought, and the Japanese significant level of high negative correlation one. In sweetness and total evaluation the Koreans indicated positive correlation and the Japanese insignificant level of nought. 2. Comparison of preference of various teas by the Koreans and the Japanese 1) Ginseng tea A and Ginseng tea B As to Ginseng tea A and Ginseng tea B the Koreans liked odor best while the Japanese liked flavor best. In general preference the Koreans liked them better than the Japanese, and both groups indicated significant level (p <.001). 2) Black tea A: As to Black tea A the Koreans liked odor best while the Japanese taste, and in general preference the Japanese liked them better than the Koreans and both groups indicated significant level (p <.001). 3) Black tea B. As to Black tea B the Koreans liked odor best while the Japanese color, and in general preference the Japanese liked them better than the Korean and both groups indicated significant level (p <.01). 4) Coffee A. The Koreans liked odor best while the Japanese flavor, and neither of the groups indicated significant level (p <.05). 5) Coffee B. The Koreans liked color best while the Japanese flavor, and neither of the groups indicated significant level (p <.05). 6) Green tea A and Green tea B. As to Green tea A and Green tea B, the Koreans liked odor best while the Japanese taste. In general preference the Japanese liked them better than the Koreans, both indicated significant level (p <.001). 7) Malcha (a kind of traditional Green tea) Both groups liked flavor best, in general preference the Japanese liked it better than the Koreans, and both groups indicated significant level (p <.001).

• Journal of Periodontal and Implant Science
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• 제32권3호
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• pp.631-642
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• 2002

The present study evaluated of regeneration effect of platelet rich plasma on the treatment of classII furcation involvement, with allograft in humans. The control was treated without bioabsorbable membrane, and the test was treated with bioabsorbable membrane. Pocket depth, clinical attachment level, and gingival recession were measured at baseline, postoperative 3, 6months. Both groups were statistically analyzed by Wilcoxon signed Ranks Test & Mann-whitney Test using SPSS program (5% significance level). The results were as follows: 1. The change of pocket depth and clinical attachment level in both groups was decreased significantly at 3, 6months.(p<0.05) 2. The change of gingival recession in both groups was increased significantly at 3, 6months than at baseline.(p (0.05) 3. The change of pocket depth and clinical attachment level in both groups was increased significantly at 3, 6months, but there were no statistically or clinically significant differences with both groups. 4. The change of gingival recession in both groups was increased significantly at 3, 6months, but there were no statistically or clinically significant differences with both groups. 5. The significant reduction of the pocket depth and clinical attachment level exhibited marked changes at 3 months in both groups. In conclusion, the results of this study suggest that there are no statistically or clinically significant differences between with and without bioabsorbable membrane on treatment of classII furcations using allograft and PRP

• 전자공학회논문지A
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• 제30A권2호
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• pp.63-75
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• 1993

As the CMOS technology becomes the most dominant circuit realization method, the cost problem for the test which includes both the transistor-level FET stuck-on and stuck-off faults and the gatelevel stuck-at faults becomes more and more serious. In accordance, this paper proposes a test set and its generation algorithm, which handles both the transistor-level faults and the gate-level faults, thus can unify the test steps during the IC design and fabrication procedure. This algorithm uses only the logic equation of the given logic function as the input resource without referring the transistor of gate circuit. Also, the resultant test set from this algorithm can improve in both the complexity of the generation algorithm and the time to apply the test as well as unify the test steps in comparing the existing methods.

• 통상정보연구
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• 제12권4호
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• pp.3-24
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• 2010

This study aims to identify the determinants on the implementation level of e-Trade of Chinese exporters in Shandong Province, China. From the review of previous studies, a research model and six hypotheses were set up and tested by the multiple regression analysis with total 127 effective survey data. Among the company characteristics, the company size was statistically significant to the utilization range and the utilization level. But unlike former studies in Korea, the utilization range showed the (-) mark. On the other hand, the innovative attitude of CEO didn't show statistical significance to both the utilization range and the utilization level. Among the information characteristics, the IT infrastructure was not statistically significant to both the utilization range and the utilization level. On the other hand, the education and training of technical personnel didn't have a significant effect on the utilization range, but it had a statistically significant effect on the utilization level. Among the external environment, the intensity of competition had a statistically significant effect on both the utilization range and the utilization level. In summary, the implementation level of e-Trade of Chinese exporters in Shandong Province, China is still behind that of Korea. But the fact that the small and medium-sized Chinese exporters are using Internet more actively than large companies suggests some implications for those of Korea.

• 한국치위생학회지
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• 제14권2호
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• pp.173-179
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• 2014

Objectives : The purpose of this study is to provide the basic data for the development of oral health education program and to make schoolchildren practice the right oral health care behaviors. Methods : Data were collected from 259 elementary school students including 134 boys and 125 girls in Busan from November 26 to December 20, 2012. The groups were tooth brushing group and dental clinic group. All statistical analyses were analyzed by frequency analysis and chi-square test using SPSS 18.0 program. Results : School dental clinic group showed higher awareness level of fluoride and sealant effect of prevention(p=0.000). Toothbrushing facility group showed higher awareness level of brushing tooth(p=0.011). School dental clinic group showed higher awareness level of fluoride toothpaste(p=0.000). Both school dental clinic group and toothbrushing facility group showed higher awareness level of oral health education(p=0.001). School dental clinic group showed higher awareness level for tooth brushing method after education(p=0.000). Both school dental clinic group and toothbrushing facility group showed higher level of education. Conclusions : School dental clinic group showed higher level for oral health knowledge and toothbushing facility group showed high level for oral health behavior. Both School dental clinic group and toothbrushing facility group showed higher level of oral health education and tooth brushing method after education. Both school dental clinic group and toothbrushing facility group proved to promote oral health. Activation of school toothbrushing facility is very important to change the oral health workforce.

• Journal of Periodontal and Implant Science
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• 제34권3호
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• pp.509-522
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• 2004

This study was performed to compare the clinical effectiveness of two regenerative techniques for class II furcation involvements in human: a combination of bone grafts with PRP vs. GTR with bone grafts. The e-PTFE group was treated with non-absorbable membrane and bone grafts, the PRP group was treated with PRP and bone grafts Pocket depth, clinical attachment level, and gingival recession were measured at baseline and postoperative 6 months. Vertical and horizontal furcation depth were measured by re-entry surgeries at 6 months post-treatment Both groups were statistically analyzed by Wilcoxon signed Ranks Test & Mann-whitney Test using SPSS program (5% significance level). The results were as follows: 1. The change of pocket depth, clinical attachment level, vertical furcation depth and horizontal furcation depth in both groups was decreased significantly at 6 months than at baseline. (p<0.05) 2. The change of gingival recession in both groups was increased significantly at 6 months than at baseline. (p<0.05) 3. The change of alveolar crest absorption in both groups was increased at 6 months than at baseline but there were no statistically significant differences. 4. The change of pocket depth, clinical attachment level, vertical furcation depth and horizontal furcation depth in both groups was increased significantly at 6 months, but there were no statistically or clinically significant differences with both groups. 5. The change of gingival recession and alveolar crest absorption in both groups was increased at 6 months, but there were no statistically or clinically significant differences with both groups. In conclusion, the use of bone graft with PRP or GTR technique improved clinical index of the soft and hard tissue in mandibular class II furcation involvement but there were no statistically or clinically significant differences between bone graft with PRP and GTR technique.