• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2009.04a
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• pp.65-71
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• 2009

The process of cold rolling is becoming more severe with the increase in the production of high tensile steel strip as a result of increased demand. Consequently, there is a need to develop work roll materials with better resistance to wear and roll failure. DOOSAN has developed an improved in-house 5%Cr alloy, New HSR1, with properties superior to the existing in- house 5%Cr alloy, Old HSR1. Test alloys were designed with controlled amounts of Si and Mn based on Old HSR1 and an optimum alloy was chosen based on thermal shock tests. A prototype work roll was manufactured with New HSR1, and properties of test specimens were evaluated. The results indicated that New HSR1 has better properties than Old HSR1. After application of New HSR1 work rolls, productivity increased due to advanced resistance to wear and roll failure.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.907-909
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• 2012

주민등록번호는 주민생활의 편익 증진과 행정사무의 적정한 처리를 목적으로 도입되었으나 인터넷의 발달과 함께 관행적이고 무분별하게 사용되어 왔다. 수집된 주민등록번호가 해킹 등의 유출사고로 명의도용 등 범죄에 악용될 우려가 커지자 이를 근본적으로 해결하기 위하여 2011년 방송통신위원회는 인터넷상 주민등록번호 수집 이용을 제한하는 법 제도적 정책을 추진하였다. 정보통신망법이 개정되어 주민등록번호의 사용이 제한되면서 사업자에게 본인확인, 연령확인 등 법률의무의 이행이나 고객의 분쟁조정 등 목적을 위해 주민등록번호를 대체할 본인확인수단이 필요하게 되었다. 본 논문에서는 주민등록번호를 이용자가 입력하지 않으며 보편적으로 사용하고 있는 인프라를 이용하고 단순한 입력정보의 변경을 통해 본인확인을 할 수 있는 방안을 제안한다.

• The Journal of the Korea Contents Association
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• v.19 no.8
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• pp.556-564
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• 2019

The purpose of this study is to examine the effects of team based learning on academic achievement, problem solving skill, and communication ability in high risk pregnant nursing. This experimental study is designed for a equivalent control group. The program was put into practice 1 times a week for 8 weeks. The number of subjects in this research consists of 120, where 60 of the experimental group participated in team based learning program and 60 of the control group didn't do. The data was analyzed by ${\chi}^2-test$, Fisher's exact test, independent t-test, and paired t-test. The effects of team based learning approaches on learning outcomes in high risk pregnant nursing are as follows: The problem solving skill of the experimental group has been significantly more elevated than that of the control group. The experimental group has made increase in communication ability. This study has significance in that it identified the availability of the team based learning program and that it would be useful teaching and learning method to achieve learning outcomes.

• Journal of International Academy of Physical Therapy Research
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• v.8 no.1
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• pp.1071-1076
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• 2017

The purpose of this study was to determine if a gentle form of manual lumbar traction could reduce painful lumbar motions associated with lumbar disc degeneration (LDD). This clinical trial incorporated 134 participants with painful active lumbar motion. Participants were randomly assigned to an experimental treatment or sham group. 67 participants received sidelying manual lumbar traction while the other 67 participants received a sham treatment. Pre and post treatment NPRS values for the painful active lumbar motion were recorded for each group. There was a statistically significant improvement (P=0.00) for decreased pain intensity during active lumbar motion in the experimental group as compared to the sham treatment group. The average percent decrease in numeric pain rating scale (NPRS) values was 52.1% for the experimental treatment group and 8.1% for the sham group. The results of the study suggest that side-lying manual lumbar traction can improve painful lumbar motion in patients with LDD.

• Journal of Information Technology Services
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• v.15 no.1
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• pp.131-152
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• 2016

Group social capital can be defined as an intangible asset that promotes knowledge sharing and social interaction. It is posited here that the group social capital raised and nurtured among group members positively influences on team performance in IS (Information Systems) development projects. And communication effectiveness is selected as a critical antecedent and its detailed relationships with the dimensions of group social capital are analyzed. Effective communication plays important role in ISD project teams by integrating knowledge from different areas. Moderating effects of project phase between the sub-dimensions of social capital and project performance are investigated. Hypotheses are tested using data from 131 project teams of 85 manufacturing firms. The results indicated that Communication effectiveness positively impacted sub-dimensions of social capital (social ties, trust, and shared vision). Moreover, the team performance is influenced by shared vision and trust, leaving social ties as a leading subcontract, as theoretically proposed in prior research. The project phase moderates the impact of shared vision on team performance.

• The Journal of the Korea Contents Association
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• v.11 no.8
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• pp.260-273
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• 2011

Utilizing cross-functional project teams is an attractive organizing option, particularly in solving complex and innovative problems that require diverse sources of information, knowledge, and expertise brought by individuals from different functional backgrounds. This study is aiming at finding the group dynamics surrounding and inside the teams for the better understand what makes cross-functional project teams effective. Adopting variables from small group research and organizational context research, I extract critical antecedents, mediator, and team-coaching that lead to team performance. Data from 32 cross-functional project teams consisting of 214 individual respondents are analyzed through regression analyses for hypotheses testing. Results of the analyses demonstrate that the team process and team performance are significantly affected by the composition of competence in team and team compensation. Also I find that team-coaching as a leadership behavior has influence on team process and team performance. Some implications, future research directions, and limitations are discussed.

• The Journal of the Korea Contents Association
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• v.12 no.5
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• pp.541-552
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• 2012

The purpose of the study was to investigate the effects of On-Line Community Assisted Team Learning (OCATL) activities on academic achievement and team member's Shared Mental Model(SMM) subscale scores. Two studies were conducted over two semesters in different universities. The first study was aimed at examining the effects of OCATL on university students' academic achievement using pre- and post- experimental design. For this experiment, 133 university students composed of 80 male and 53 female students from 13 colleges participated. The OCATL activities included the orientation of OCATL, seminar on collaborative learning, on-line community assisted team learning with sixteen hour participation during one semester and a final report (or a term paper). To measure these students' academic achievement, their pre- and post-semester's GPA were compared. The results of paired t-test revealed a significant difference in academic achievement (p<.05). The second study was designed to compare the scores of SMM subscales of the experimental group with the OCATL activities and those of the control group without using OCATL activities. The data was collected using the scale of Shared Mental Model(SMM)-short version developed by Johnson in 2011[18]. For this study, 74 participants from 10 teams served as an experimental group and 15 teams which were not exposed to OCATL activities served as a control group. The MANOVA results showed that SMM subscores of two groups measured after the experiment were statistically significantly different: The experimental group with the OCATL activities showed high scores on general task and team knowledge, general task and communication skills, attitudes toward team and task, team dynamics and interactions, team resources and working environment, and satisfaction with the team.

• International Journal of Advanced Culture Technology
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• v.10 no.1
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• pp.180-186
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• 2022

This study is a pilot study to confirm the effectiveness of training after applying emergency simulation training for inactive nurses and to present a new model of simulation training operation method. In this study, the control group is a group that directly participates in the simulation activity, and the experimental group is the group that observes the control group's simulation activity. Experimental group and control group were matched 1:1 to experience all the roles of the resuscitation team. The study participants were 5 inactive nurses in the experimental group and 5 inactive nurses in the control group, and the total training time was 5 hours. The emergency simulation operation composition consists of theory education, skill education, and simulation. The interview was conducted. The educational satisfaction of the participants was 4.65 points for theory education and 4.70 points for practical education based on 5 points. Participants' performance confidence improved from 3.60 points before operation to 7.20 points after operation. Emergency simulation operation consisted of pre-test, theory education, skill education, simulation implementation, debriefing, and post-test. Participants expressed that the choice of group greatly reduced the burden and anxiety about performing the role of the resuscitation team. However, difficulties and inexperience in the operation of the defibrillator were reported in the experimental group. The control group reported that the simulation activity of the experimental group was not significantly different from theirs. Through the results of this study, it was confirmed that emergency simulation education not only reduced the burden and anxiety of inactive nurses, but also had an effect of education. Based on the research results, it is proposed to expand the participants and verify the effectiveness of education through specific variables such as learning commitment, learner confidence, simulation satisfaction, and team effectiveness.

• Journal of Engineering Education Research
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• v.14 no.3
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• pp.9-14
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• 2011

This study was conducted to compare the learning styles and self-leadership between engineering college students with high and low team performance records. About 70% of students in high team performance group showed learning styles of converger and accommodator, whereas about 67% of students in low team performance group showed learning styles of accommodator and diverger. In regard to self-leadership, high team performance group showed higher level of self-leadership, especially self-observation, self-punishment, natural reward strategies, visualizing successful performance, self-talk, and evaluating beliefs and assumptions. It is recommended to provide the engineering students with the specialized training program to complement their learning styles and self-leadership strategies.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.24-25
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• 2022

Based on the case of Busan Port November anchorage, which is a group anchorage, related regulations to promote group anchorage safety management, the turning radius of anchored ship, and more accurate weather information collection and safety through improvement of the supporting system for VTS operations to apply the anchorage location in accordance with reality that it is a suggestion for management improvement methods.