• Korean Journal of Construction Engineering and Management
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• v.18 no.6
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• pp.109-120
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• 2017

Even though domestic construction companies are expanding into overseas construction markets, the profitability of overseas project are decreasing and finally some biggest domestic construction companies recorded heavy deficit one after another in 2013. Contract management, which is very deeply related to profitability, is the most difficult area to domestic construction companies, especially in Middle East and Asia where they have the highest market share and a high level of contract management is required. The purpose of this study is to assess their contract management competences to help them improve contract management skills and strategies. First, we defined the overseas project contract management process and selected competences from the each process stage. Then, we conducted a survey with overseas project experts. For considering their competences from various angles, we divided survey groups into domestic construction groups and other groups (Contract consultancy agencies and Construction research institutes) to understand the internal and external perspective of the domestic construction companies' contract management competences. The results of survey was analyzed by using paired samples t-test, Borich Needs Assessment Model and Independent t-test. We expected that the results of this study could contributes to establish strategies for enhancing the domestic construction companies' contract management competencies.

• Culinary science and hospitality research
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• v.21 no.2
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• pp.215-229
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• 2015

The purpose of this study was to identify the management situation and development plan targeting private bakery owners who are doing business in major cities. For research, the questionnaire survey was conducted targeting 69 owners who are operating bakery at the point of data collection, and the data were analyzed using frequency analysis and paired-sample t-test using SPSS. The results of the study were as follows. Owners' baking career and management career were mostly more than 10 years. They are currently managing bakeries with at least 4 competing bakeries and point out franchise-type bakeries as major competitors. Also, they responded that the most important factor for strengthening competitive edge of shop was employees and that the enhancement in technology and employees with adequate techniques are important for improving sales. Also, the result of paired sample t-test revealed that the communication had the biggest difference between importance and satisfaction perceptions among taste, sanitation, service, price, product, location, and communication. Limitations and future research directions are also discussed.

• Journal of the Korean Data and Information Science Society
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• v.27 no.2
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• pp.409-417
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• 2016

The purpose of this study was to demonstrate the effect on the degree of fatigue and accuracy of cardiopulmonary resuscitation according to the different time delays (3 minutes, 4 minutes). Carrying out repeated measures of variance (repeated ANOVA), we have shown that time effect (F = 7.835, p <.01) and group effect (F = 8.695, p<.01) and the interaction effect between time and group (F = 12.582, p<.001) were all statistically significant. It means, in the test of the main effect of group and time (3 minutes, 4 minutes) using the Bonferroni method, it turned out that the amount of lactic acid of the experimental group was larger than that of the control group (p<.01), and there was no difference until 3 minutes, but the difference of the amount of lactic acid was shown between before the experiment and after 4 minutes, and between 3 minutes and 4 minutes (p <.05), respectively. Then, in the result of the corresponding sample t-test, for comparing the according to the measurement time, the accuracy after 3 minutes became higher than the case of 4 minutes (t = 4.584, p <.001). Therefore, before 119 arrives performing cardiopulmonary resuscitation for emergency, rescuers need to perform cardiopulmonary resuscitation alternating with others before 3 minutes.

• Proceedings of the Korea Contents Association Conference
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• 2012.05a
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• pp.349-350
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• 2012

본 연구에서는 경첩 발목 보조기(Hinged Ankle Foot Orthoses, HAFO)의 착용이 경직성 뇌성마비 아동의 보행 시 신체 질량 중심점(Center of Mass, COM)에 미치는 영향을 알아보고자 한다. 실험은 보조 기구의 사용 없이 독립적인 보행이 가능한 경직성 뇌성마비 아동(하지마비 아동 8명, 편마비 아동 5명) 13명이 참여하였다. 34개의 적외선 반사 마커를 신체에 직접 부착한 뒤, 6대의 동작분석 카메라로 맨발 보행과 HAFO착용 보행을 각 5회 촬영하였다. 전-후방, 내-외측, 수직 방향으로의 COM의 이동과 COM 속도를 계산하여 HAFO착용 전 후를 대응표본 T검정으로 분석하였다. HAFO 착용은 양하지 마비 아동 그룹은 COM의 전방 이동이 유의하게 증가하였고(p<0.01), COM 속도는 내-외측과 수직 방향에서 유의하게 증가하였다(p<0.01). 반면 편마비 아동 그룹은 COM 이동과 속도가 모든 방향에서 유의하게 증가하였다(p<0.01). 따라서 HAFO는 뇌성마비 아동의 보행 기능을 개선시킨다고 할 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1125-1128
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• 2013

본 논문에서는 여성들의 개별 패션 선호도로부터 패션 선호 패턴을 분석하고 이를 이용하여 고객에게 맞는 의류를 추천하는 모바일 의류 추천 시스템을 제안한다. 패선 선호관련 설문조사로부터 대응표본 T-검정 방법을 이용하여 선호 특성과 의류와의 유효한 관계를 찾고, 이를 바탕으로 선호 특성에 따른 의류 분류 기준을 작성하였으며, 카이제곱 검정 방법을 통해 선호 특성과 의류 사이의 연관성을 파악하고 선호 특성에 따른 선호 의류 추천을 위한 규칙을 도출하였다. 이러한 규칙을 활용하여 각 사용자의 구입의사 및 패선 선호 특성에 따른 의류를 추천해 주는 시스템을 구현하였으며, 이에 대한 만족도를 조사한 결과 10 점 만점에 7.1 점으로 나타났다. 본 논문에서 제안한 모바일 의류 추천 시스템을 통해 사용자는 선호 의류를 추천 받을 수 있으며, 이로부터 제품의 정보 부족으로 발생하였던 모바일 쇼핑의 문제점을 해결할 수 있을 것이다.

• Journal of the Korean Data and Information Science Society
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• v.21 no.6
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• pp.1101-1108
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• 2010

This study was conducted to investigate whether whole body cryotherapy and spinal decompression have effectiveness on the pain, lumbar flexion range of motion, and global perceived effect scale in patients with lumbar disc herniation. Thirty subjects were participated in this study. And they were all randomly divided into whole body cryotherapy and spinal decompression group. To evaluate the effects of whole body cryotherapy and spinal decompression, subjects were evaluated by using visual analogue scale, lumbar flexion range of motion, and global perceived effect scale. The assessment parameters were evaluated before, after 2 weeks treatments. And we received a consent form whole body cryotherapy subjects. The results of paired t-test, independent t-test, and ANCOVA analysis of variance showed that pain, lumbar flexion range of motion, global perceived effect scale were significantly improved after than before therapy in whole body cryotherapy group. So we conclude that whole body cryotherapy has effectiveness on the pain, lumbar flexion range of motion, and global perceived effect scale in patients with lumbar disc herniation.

• Journal of Digital Convergence
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• v.16 no.12
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• pp.87-95
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• 2018

The purpose of this study was to validate the effectiveness of academic motivation improvement program for underachieved students. Participants in the program consisted of 14 sophomores and senior. They were randomly assigned to either the experimental group(n=7) or the control group(n=7). To analysis the effectivness, matched pair t-test and independent t-test. The programs offered 6times. The results are follows. First, for the experimental group that took part in motivation improvement program, there was a increase in self-esteem. But the improvement was not significant. Second, for the experimental group that took part in motivation improvement program, there was a significant decrease in academic amotivation. Third, the experimental group showed a more significant decrease in academic amotivation. Finally, the significance and limitations of this study and suggestions for future research were presented.

• Management & Information Systems Review
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• v.37 no.4
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• pp.1-20
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• 2018

This study aimed to examine earnings quality of firms selected as Global Champs project which has been promoted by the government since 2013 to support small and medium sized enterprises, for the screening year(t-1) and selected year(t). Earing quality is measured as the value of discretionary accruals estimated by Dechow et al.(1995) adjusted Jones model and Kothari et al.(2005) model, respectively. I analyze the differences of earning quality between the Global Champ firms and the paired firms selected through criteria of the similar total assets and the same industry in the screening year and the selected year. This study is motivated by the needs of measurement of the performance of the Project from the accounting transparent point of view. As the results of this study, major findings are summarized as follows. Firstly the earnings quality of the selected firms was lower than that of the paired firms. This can be explained as a result of motivation of earnings management by companies eager to meet the requirements to be selected for the Project. Secondly, in the selected year, the earnings quality was proved to improve, comparing to the screening year. This can be explained by the efforts of companies to reinforce management innovation and transparent management, which in turn led to positive effects on the earnings quality. These findings were found to be consistent in the additional analyses, where the earning quality of the reconstructed sample with only selected companies was compared for the screening year and the selected year, based on the year before the screening year(t-2).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.9
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• pp.424-431
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• 2020

The purpose of this study was to investigate the effects of the Otago exercise program on physical function and risk of falling in elderly who have experienced falls. Thirty-six elderly people who had experienced falls more than once were randomly classified into an experimental group and control group. Each group exercised 30 minutes three times per week for a total of 8 weeks. Measurements were made using Tetrax to assess risk of falls. In addition, to measure physical function, static balance was measured using Biorescue, dynamic balance was measured using TUG, walking ability was measured using 10 MWT, and lower extremity strength was measured using FTSST. A paired t-test was conducted to verify the difference between before and after exercise in each group, and an independent t-test was performed for comparison between the groups. Regarding the experimental and control groups, static balance ability and dynamic balance ability increased significantly after exercise, and risk of falls decreased (p<.05). Lower extremity strength and gait ability increased significantly after exercise only in the experimental group (p<.05). Based on these results, the Otago exercise program is effective in improving physical function and reducing risk of falls in elderly people who have experienced falls.

• Journal of Convergence for Information Technology
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• v.8 no.4
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• pp.73-80
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• 2018

The purpose of this study was to investigate the effect of motion-based dance game on static and dynamic balance in elderly women. The participants were randomly divided into 2 group, Motion Based dance game group(n=10), control group(n=10). After they were divided into an Motion Based dance game group and a control group the Motion Based dance game group participated in six-week period of time, three times a week, 60 minutes each, and the control group didn't exercise outside of their daily lives. To evaluated the balance ability of exercise, it was evaluated by using Berg Balance Scale(BBS), Functional Reach Test(FRT), Timed Up and Go test(TUG). The data was analysis using a paired t-test and independent t-test to determine the statistical significance. The results of this study between BBS, FRT, TUG and Motion Based dance game group had statistically significant difference rather than control group(p<.05). In conclusion, the Motion based Dance Game showed improvement on the balance ability in the elderly. Regular maintenance of the Dance Game "Dance Central" program for the elderly will assistance improve the balance. Consequently, studies on the development of dance games suitable for the elderly are believed to be necessary.