• 한국안전학회지
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• 제37권1호
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• pp.20-29
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• 2022

To stem the ever-prevalent occurrence of industrial accidents in the construction industry, which is emerging as a social problem, efforts must be invested by various stakeholders. Specifically, among stakeholders, the orderer is at the top of a project's decision-making structure. Therefore, the orderer's awareness of safety and health directly affects the process of securing the safety of the overall construction site. In this light, the present study aims to identify differences in the perceptions of each stakeholder regarding the obligatory safety and health measures for clients that have recently been introduced. In addition, it suggests specific implementation plans in the Korean context. The data used for analysis were collected through a survey targeting stakeholders such as orderers, safety managers, and site managers, and the collected data were quantitatively reviewed by using multivariate analysis methods such as analysis of variance. As a result of the analysis, the introduction of safety and health obligations for the owner was found to be necessary, and the designation and operation of safety and health experts as an action plan was deemed reasonable. The authors expect that the results of this study can be used as basic data for revising the related regulations in Korea. Moreover, as a further study, a review of the effectiveness after improving regulations would contribute strongly to the domain.

• 한국정보통신학회논문지
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• 제26권6호
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• pp.922-929
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• 2022

이 연구는 PBL을 활용한 CAE 수업이 전문지식 습득과 역량 제고에 미치는 영향을 분석한다. 동의대학교 자동차공학과 3학년 학생들에게 1년 과정의 교과목에 PBL 수업을 적용하였으며, 1학기와 2학기에 각각 만족도 및 효과에 대한 설문조사를 실시하였다. 각 학기별 설문조사에서 유의미한 차이로 2학기의 만족도가 높은 것으로 나타났으며, 비대면 정보교류와 팀 활동에 대해서는 만족도가 높게 나왔다. 아울러 교과목에 대한 지식과 기주도학습, 문제해결력, 의사소통 등의 개인 역량 향상에도 긍정적인 영향을 미치는 것으로 평가됐다. 본 연구는 수업 개선을 위한 정량적 지표로 사용될 수 있으며, 교과목 운영의 기초자료로 활용할 수 있다는 점에서 교육적 함의가 있다.

• 문화기술의 융합
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• 제7권4호
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• pp.435-440
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• 2021

본 연구는 2020-2학기 00_대학교 <문화와 철학의 이해>라는 균형교양교과목에서 실시한 PBL(문제중심학습) 수업 사례를 통해 그 학습의 효과를 고찰한 것이다. 학습을 통한 효과는 다음과 같다. 첫째, PBL(문제중심학습)은 교수자와 학습자 간의 적극적인 상호작용이 충분히 이루어진다. 비대면 학습이 장기화되고 있는 실정에서 PBL교수법은 교수자-학습자, 학습자-학습자 간의 충분한 상호작용이 이루어진다. 둘째, PBL학습은 교과목 특성에 맞는 다양한 문제를 적극적으로 활용하고, 역할 분담과 협업의 과정을 적극적으로 활용할 수 있다. 셋째, 문제 상황에 대한 비판적 인식을 확장할 수 있다. 본 수업 사례에서 확인한 한계점은 첫째, <문화와 철학의 이해>라는 교과목의 특성상 세계문화 현상에 대한 논의는 충분히 가능하지만, 철학이라는 관점에서 논의가 되어야 한다. 철학적 부분을 분히 검토하여 적절하게 적용해야 한다. 둘째, 비대면 온라인에서 팀 작업이 쉽지 않다는 점이다. 오프라인 수업에서 팀을 이루어 학생들이 논의의 과정을 거친다면 훨씬 효과적인 학습이 이루어질 수 있을 것이다.

• 한국게임학회 논문지
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• 제21권2호
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• pp.139-150
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• 2021

본 연구는 게임적 요소를 활용한 대학 신입생 대상의 협력적 문제해결역량 강화 온라인 프로그램을 개발하여 효과성을 분석하였다. 연구결과, 게임적 요소를 활용한 협력적 문제해결역량 강화 온라인 프로그램의 운영 모델은 ①사전준비, ②팀빌딩, ③평가, ④피드백, ⑤공유의 5단계로 제시하였으며, 창의적 문제해결역량의 사전-사후 T-검정 결과, 창의적 문제해결 역량 관련 변인인 학업도전, 창의적 사고능력, 융합적 가치창출이 유의미하게 향상된 것으로 나타났다. 향후 논의되어야 할 사항으로 온라인에서 협력적인 문제해결과정을 경험하고, 토론, 의사소통이 가능한 게임설계 및 플랫폼 개발의 필요성을 제시하였다.

• 드라이브 ㆍ 컨트롤
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• 제18권4호
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• pp.1-8
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• 2021

An electro proportional pressure control valve is mainly used to control the clutch of an agricultural tractor's automatic transmission. During transmission, the operating, hydraulic oil is mix with many kinds of contaminants. The contaminants can be trapped between the valve body and spool of the proportional pressure control valve leading to abnormal operating conditions and finally critical damage to the transmission hydraulic system. The present study aimed to verify the valve control algorithm as a basic study of developing control logic that removes contaminants between the spool and the body of the proportional pressure control valve. To develop the algorithm, MATLAB/SIMULINK was used. PWM method was used to control the applied solenoid coil current. The effectiveness of the algorithm was verified by comparing the actual pressure of the normal valve with the actual pressure of the abnormal valve. Based on the present study findings, when the algorithm was applied, the response of the valve pressure according to the current became stable and oil contaminated particles were removed. In the future study, the control algorithm will be optimized for the stability of the proportional pressure reducing valve, and it will be verified in consideration with the driving of the clutch.

• 실천공학교육논문지
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• 제14권1호
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• pp.91-97
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• 2022

핵심적인 미래역량(비판적 사고, 의사소통, 협업, 창의성) 개발을 위한 대표적인 교육방법으로 문제중심 학습법(PBL, problem based learning)이 주목받으며 대학에서의 적용이 확산되고 있다. PBL 수업의 중요한 특징 두 가지는 '팀원들과의 협업'과 '상호작용에 기반한 참여형, 자기주도적 학습'이다. 최근 코로나19 팬데믹이 장기화 됨에 따라 비대면 원격수업이 대학교육에서 임시방편이 아닌 필수요소가 되었고, 시공간 제약에 의해 앞서 언급한 두 가지 특징을 충족시키기 어렵다는 한계점에 부딪혔다. 본 논문에서는 기존에 H대학에서 비대면으로 운영했던 PBL 강좌 사례에 대한 한계점을 분석하고, 메타버스 가상공간에서 이루어지는 개선된 PBL 수업 방식을 상세하게 설계하였다. 제안하는 메타버스 활용 PBL 수업에서는 팀에서 진행한 연구 내용들을 담은 자료(이미지, pdf, 동영상 파일 등)를 3차원 가상공간에 갤러리 형태로 자유롭게 꾸미고 전시할 수 있어서 팀원들의 적극적인 참여를 유도할 수 있다. 또한 갤러리를 팀원들의 프로젝트 협업 공간으로 활용할 수도 있고, 최종 프리젠테이션 장소로 활용할 수도 있다. 이 수업 방식은 가능한 빠른 시일 내에 동일 PBL 수업에 적용하여 효과성을 분석하고 개선점을 도출할 것이다.

• 대한통합의학회지
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• 제11권1호
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• pp.71-78
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• 2023

Purpose : This study was purposed to analyze the effectiveness of PBL (Problem-Based Learning) classes and to derive class improvement plans. Methods : The subjects of the study were 48 students who took the 4th grade clinical dental hygiene course at S University located in Chungcheongnam-do of South Korea in 2021. A single-group pre and post experimental study was designed to verify whether there were significant changes in the research variables of students who participated in the class to which problem-based learning was applied. A paired-sample t-test was conducted for the collected data of 46 respondents. Results : As a result, the degree of improvement in problem clarification, cause analysis, and alternative development among the five sub-areas of problem-solving ability was statistically significant. This means that the problem-based learning class positively affects dental hygiene major students' ability to clarify problems, the ability to analyze causes to collect and analyze information, and the ability to develop alternatives to make decisions, thereby improving overall problem-solving abilities. However, the improved post-score was not statistically significant in the planning/execution and performance evaluation of the remaining two subdomains. In addition, post-scores of the leader aspect, opinion exchange, opinion evaluation, and opinion integration, which are sub-domains of collaborative self-efficacy, all showed great statistical significance. Problem-based learning improved the collaborative efficacy of dental hygiene major students overall by positively influencing the ability to lead a team, exchange and evaluate each other's views, and constructively integrate different views. Conclusion : It was found that both the subject's problem-solving ability and cooperation efficiency improved under the influence of problem-based learning. On the other hand, implications for improvement of the future class such as the necessity of supplementing strategies to promote planning and execution ability for problem solving, and ability to evaluate problem solving performance was suggested.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.622-627
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• 2009

Business process engineering (BPE) is a top-down management approach for increasing efficiency and productivity through radical and fundamental changes to the business processes of the organization. BPE requires firms to initially develop a model of the existing business processes of the firm to distinguish functional tasks from processes used for coordinating inputs, activities and outputs. The model is used for understanding the business processes in the organization and to simulate the effect of changes to the processes. The model can also be used to justify business processes, which involves assessing whether the business process provides value to the customer in its current configuration. Justification requires a careful examination of the key business processes used by the firm to identify systemic shortcomings in the process and to create a new business process to produce greater efficiency. BPE also considers automating as many business processes as possible to increase operational efficiency and the integration of business process tasks. The construction industry has been slow to adopt BPE because of its project approach in which a major firm contracts with various functional service providers and regards each project as unique. The industry focuses on functional task efficiency rather than business process efficiency. There is no formal methodology or criteria for determining whether a business process is effective for a construction firm in its current configuration. The use of performance measures such as costs, task duration times or other metrics can be useful in evaluating the effectiveness of an existing business process and for modeling the possible outcome of a fundamental and radical change to the process.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.345-353
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• 2009

The success and failure of any project depends upon many factors, the Project Manager is considered to be the key contributor to the success of any project, as well as a guide to the team members to achieve the client satisfaction (Cost, Time and Quality). Therefore the main aim of this paper is to provide a practical approach for understanding the importance of the Project Manager and his effectiveness to the success of the construction projects. In addition, the Project Manager's roles, responsibilities and duties have direct impact to the success of the construction projects. In order to identify the thoughts and opinion of the construction industry on this particular assertion, a quantitative study was carried out within the UK construction industry. The result of the study shows that there is an extremely strong correlation between the Project Manager and the success of the construction projects. In construction projects the Project Manager is considered to be one of the most important people who can lead and drive the projects in the right direction and conclude construction projects successfully. Moreover, these can play the most important role regarding the improvement of the organization's performance, the organization's profitability and the client's satisfaction. The research confirmed that the Project Manager is a very essential element to the success of the construction project and have an impact at every stage of the construction project. So it concluded that selection of a Project Manager should be carefully done with regard to experience, knowledge, power/authority and good understanding to the kind of the project.

• 대한한방부인과학회지
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• 제36권3호
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• pp.154-172
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• 2023

Objectives: This study aimed to assess the clinical evidence supporting the use of acupuncture (AC) for premenstrual syndrome (PMS). Methods: We searched randomized controlled trials (RCTs) that used AC for PMS in 9 databases (PubMed, EMBASE, Cochrane Library, CINAHL, CNKI, CiNii, SCIENCE ON, KoreaMed, OASIS) from their inception to July 2022. Results: We identified 1,168 studies, of which 15 RCTs met the inclusion criteria. The risk of bias in the included studies was relatively unclear or high. Meta-analysis of 3 RCTs showed that the AC group had a significantly higher effective rate than the Medroxyprogesterone group (RR 1.48, 95% CI (1.23, 1.78), p<0.0001). Meta-analysis of 2 RCTs showed that there was no statistically significant difference between the AC group and the Sham AC group in the effective rate (RR 4.72, 95% CI (0.88, 25.36), p=0.07). In a review of individual studies, the AC group was more effective than the control group in terms of the effective rate, symptom scale, quality of life, adverse events, and recurrence rate. Conclusions: The AC group was more effective than general treatments groups such as sham AC, western medicine, and dietary supplements, and there were no serious adverse events. However, the evidence on the effectiveness and safety of acupuncture for PMS was inconclusive due to the small number of included studies and low quality. Therefore, systematic reviews based on more rigorously designed randomized clinical trials are needed in the future to properly evaluate the effect of AC on PMS.