• International Journal of Naval Architecture and Ocean Engineering
• /
• 제8권1호
• /
• pp.22-37
• /
• 2016

This article investigates numerical modeling of surface piercing propeller (SPP) in unsteady open water condition using boundary element method. The home code based on BEM has been developed for the prediction of propeller performance, unsteady ventilation pattern and cross flow effect on partially submerged propellers. To achieve accurate results and correct behavior extraction of the ventilation zone, finely mesh has generated around the propeller and especially in the situation intersection of propeller with the free surface. Hydrodynamic coefficients and ventilation pattern on key blade of SPP are calculated in the different advance coefficients. The values obtained from this numerical simulation are plotted and the results are compared with experiments data and ventilation observations. The predicted ventilated open water performances of the SPP as well as ventilation pattern are in good agreement with experimental data. Finally, the results of the BEM code/experiment comparisons are discussed.

• Design & Manufacturing
• /
• 제15권2호
• /
• pp.1-10
• /
• 2021

In this study, the current state of the plastics industry has been examined. The direction of development and innovation is reviewed and commented. The technical statuses of various sectors such as thermoplastic resin, composite material, mold engineering, and simulation have been scrutinized. In addition, the industrial status of each sector has been reviewed. Then, the challenges that the plastics manufacturing industry has to deal with have been discussed. Especially, the situation in Republic of Korea has been elaborated in detail. Based on the discussion, an open innovation strategy has been suggested. It has been argued in this work that the open innovation strategy will enables efficient funding and development by avoiding resource consuming rent seeking.

• 성인간호학회지
• /
• 제16권3호
• /
• pp.366-377
• /
• 2004

Purpose: This study is a descriptive research study to develop the Nurse's Humor Questionnaire, and then analyze humor's appreciation and use by Korean nurses. Method: The three stages used to develop the questionnaire were to make a conceptual framework, make an open questionnaire through the 2nd preliminary inquiry, and make a structured questionnaire based on collected statements through the developed open questionnaire. The subjects that carried out completely a structured questionnaire were 337 nurses. Result: 1) The final developed questionnaire consists of 6 domains and 67 items. The reliability of 'When feeling humor's expression'(${\alpha}=0.7079$), 'The barrier factors of humor's use'(${\alpha}=0.7895$), and 'Humor's values' (${\alpha}=0.8336$) was high. 2) The results related to Humor's values of nurses that showed significant differences were as follow: (1) age, marital status, and current position (2) a negative correlation between stress and humor's values (3) humor's sources: daily life and conversation (4) frequency of used humor (5) types of used humor: word humor, imitation, adequate situation and technical terms, and (6) when using humor's expression: tense atmosphere, awkward atmosphere and adequate situation. Conclusion: The developed tool can be used for understanding nurse's humor. This will help to develop the humor program as a nursing intervention for health promotion.

• 한국수학교육학회지시리즈C:초등수학교육
• /
• 제5권2호
• /
• pp.71-94
• /
• 2001

The purposes of this study were to design small group collaborative learning models for developing the creativity and to analyze the effects on applying the models in mathematics teaching and loaming. The meaning of open education in mathematics learning, the relation of creativity and inquiry learning, the relation of small group collaborative learning and creativity, and the relation of assessment and creativity were reviewed. And to investigate the relation small group collaborative learning and creativity, we developed three types of small group collaborative learning model- inquiry model, situation model, tradition model, and then conducted in elementary school and middle school. As a conclusion, this study suggested; (1) Small group collaborative learning can be conducted when the teacher understands the small group collaborative learning practice in the mathematics classroom and have desirable belief about mathematics instruction. (2) Students' mathematical anxiety can be reduced and students' involvement in mathematics learning can be facilitated, when mathematical tasks are provided through inquiry model and situation model. (3) Students' mathematical creativity can be enhanced when the teacher make classroom culture that students' thinking is valued and teacher's authority is reduced. (4) To develop students' mathematical creativity, the interaction between students in small group should be encouraged, and assessment of creativity development should be conduced systematically and continuously.

• 설비공학논문집
• /
• 제25권7호
• /
• pp.418-426
• /
• 2013

With advantages of open spaces and existing HVAC facilities, subway station, if unexpected disastrous situation happens on the ground, can be used as a temporary safe place for evacuees. The main objective of this study is to establish a guideline on estimating evacuation capacity of the subway station and evaluating levels of service of evacuation for officials to control the situation. This guideline includes available spaces of the station, capacity of sanitary fixtures, and total number of passengers, etc. In this paper, we first analyzed the number of passengers of SMRT (Line 5~Line 8) during AM peak hour and then evaluated the number of passengers using toilets at that time. In addition, we calculated the seating capacity of subway stations on SMRT using the difference between the actual number of toilets and the estimated number of ones from the occupancy time of each toilet.

• 유통과학연구
• /
• 제13권1호
• /
• pp.57-70
• /
• 2015

Purpose - Open source software has high utilization in most of the server market. The utilization of open source software is a global trend. Particularly, Internet infrastructure and platform software open source software development has increased rapidly. Since 2003, the Korean government has published open source software promotion policies and a supply promotion policy. The dynamism of the open source software market, the lack of relevant expertise, and the market transformation due to reasons such as changes in the relevant technology occur slowly in relation to adoption. Therefore, this study proposes an assessment model of services provided in an open source software service company. In this study, the service level of open source software companies is classified into an enterprise-level assessment area, the service level assessment area, and service area. The assessment model is developed from an on-site driven evaluation index and proposed evaluation framework; the evaluation procedures and evaluation methods are used to achieve the research objective, involving an impartial evaluation model implemented after pilot testing and validation. Research Design, data, and methodology - This study adopted an iteration development model to accommodate various requirements, and presented and validated the assessment model to address the situation of the open source software service company. Phase 1 - Theoretical background and literature review Phase 2 - Research on an evaluation index based on the open source software service company Phase 3 - Index improvement through expert validation Phase 4 - Finalizing an evaluation model reflecting additional requirements Based on the open source software adoption case study and latest technology trends, we developed an open source software service concept definition and classification of public service activities for open source software service companies. We also presented open source software service company service level measures by developing a service level factor analysis assessment. The Behavior-Structure-Evolution Evaluation Model (BSEM) proposed in this study consisted of a rating methodology for calculating the level that can be granted through the assessment and evaluation of an enterprise-level data model. An open source software service company's service comprises the service area and service domain, while the technology acceptance model comprises the service area, technical domain, technical sub-domain, and open source software name. Finally, the evaluation index comprises the evaluation group, category, and items. Results - Utilization of an open source software service level evaluation model For the development of an open source software service level evaluation model, common service providers need to standardize the quality of the service, so that surveys and expert workshops performed in open source software service companies can establish the evaluation criteria according to their qualitative differences. Conclusion - Based on this evaluation model's systematic evaluation process and monitoring, an open source software service adoption company can acquire reliable information for open source software adoption. Inducing the growth of open source software service companies will facilitate the development of the open source software industry.

• 인터넷정보학회논문지
• /
• 제24권4호
• /
• pp.1-13
• /
• 2023

연합학습이 현대 인공지능 연구에 큰 패러다임을 가지고 오면서 다양한 분야의 연구에서 연합학습을 접목시키기 위한 노력을 하고 있다. 하지만 연합학습 적용을 위한 연구자들은 자신의 상황과 목적에 맞는 연합학습 프레임워크와 벤치마크 툴을 선택해야 하는 문제에 직면한다. 본 연구는 실제 연합학습을 적용하는 연구자의 상황을 고려한 연합학습 프레임워크 및 벤치마크 툴의 선택 가이드라인 제시를 목표로 한다. 특히, 본 연구에서는 3가지의 주요한 기여점이 존재한다. 첫번째, 연합학습을 적용하는 연구자의 상황을 연합학습의 목표와 결합하여 일반화하고, 각 상황에 적합한 연합학습 프레임워크의 선택 가이드라인을 제안한다. 두번째, 연구자에게 연합학습 프레임워크를 각각의 특징과 성능비교를 통해 선택의 적합성을 보여준다. 마지막으로, 현존하는 연합학습 프레임워크의 한계와 실세계 연합학습 운영을 위한 방안, 특히 생명주기 관리에 대한 플랫폼의 구조에 대해 제안한다.

• 산업경영시스템학회지
• /
• 제38권4호
• /
• pp.56-63
• /
• 2015

Recently, companies and organizations are becoming increasingly dependent on external resources to keep their competitive advantages under the turbulence of global business environmental changes. Therefore, they focus on the paradigm 'Open Innovation (OI)' which is reported as a convincing strategy to improve competitive advantage in terms of budget and time-to-market. The management of Incheon International Airport Corporation (IIAC) also considers the introduction of Open Innovation not only to adapt the business environmental changes but also to be devoted its social role as a public corporation. In this paper, we describe how we derived the promotion tasks for the introduction of OI and prioritized the tasks, performing our research on the IIAC Open Innovation. For these purposes, this research conducted the following three steps; the first stage for the analysis of current situation on the IIAC Open Innovation, the second stage for the elicitation of promotion tasks, and the last stage for the prioritization of the promotion tasks. In the first stage, critical success factors (CSFs) for open innovation introduction were derived from different research papers and case studies. In the following stage, promotion tasks were elicited from the IIAC based on the CSFs. In the last stage, the promotion tasks were evaluated on the base of criteria by using Analytic Hierarchy Process (AHP). And then the promotion tasks were grouped by the result of the evaluation. In this case, thirteen promotion tasks were derived for open innovation, ten promotion tasks except three inevitable promotion tasks were evaluated, and then they were grouped into four categories based on the importance-possibility analysis.

• 한국콘텐츠학회논문지
• /
• 제21권9호
• /
• pp.312-321
• /
• 2021

은행과 핀테크 기업 모두가 참여하는 오픈 뱅킹이 전면시행되면서 새로운 형태의 제품, 서비스 및 비즈니스 등 사회 전반에 변화가 초래되고 있으며, 특히 금융회사를 포함한 금융환경 전반의 큰 변화가 예상되고 있다. 이렇게 새로운 시스템과 환경이 변화할 때 마다 시스템 사용자들의 기술 수용에 대한 연구는 지속적으로 이어져 왔으며, 본 연구 역시 오픈 뱅킹의 특성이 기술수용모델의 지각된 용이성과 유용성, 그리고 오픈 뱅킹의 사용의도에 어떠한 영향을 미치는지 검증하였다. 연구 결과, 정보 제공성과 서비스 상호작용성, 시스템 안정성 모두 지각된 용이성과 유용성 그리고 오픈 뱅킹의 사용의도에 유의한 영향을 미치는 것으로 나타났다. 향후 오픈 뱅킹은 데이터 공유, 재무 접근성, 은행 인프라, 상품 혁신 및 가격결정 등에 중대한 이익을 가져올 수도 있지만, 예상치 못한 피해를 가져올 수도 있을 것으로 전망된다. 따라서, 국내 금융기관들은 디지털 환경변화에 따라 사업 환경이 크게 변하고 있는 상황에서 적극적으로 대처해야 하며, 핀테크 기업들을 적극적으로 육성하는 동시에 금융 산업의 혁신을 도모해야 할 것이다.

• 정보관리학회지
• /
• 제29권4호
• /
• pp.143-163
• /
• 2012

현재 국내외 대학도서관의 전자학술정보 입수는 일명 빅딜로 불리는 수백, 수천 종의 전자학술지 묶음을 다년간, 고정된 인상율로 계약하는 구독방식이 주류를 이루고 있다. 1990년대 중반에 시작된 이러한 구독방식은 대학도서관과 이용자에게 많은 장점을 제공했다. 하지만 이들 패키지의 가격이 지속적으로 상승함에 따라 이러한 방식의 지속가능성에 대한 의문이 제기되고 있다. 현재까지 pay-per-view 방식을 제외하면 구독기반 모형의 구체적인 대안은 제시되지 않고 있으며 향후 도서관 예산문제가 심각한 뇌관으로 남아있다. 2000년대 초반 시작된 오픈액세스 운동은 다양한 방법으로 학술지의 출판과 유통의 장벽을 제거하고 있다. 오픈액세스 출판 규모는 매년 두 자릿수로 증가하고 있고, 오픈액세스 학술지 논문은 Scopus와 Web of Science 인용데이터베이스에의 편입비율이 20%에 육박하는 등 양적, 질적인 성장을 보이고 있다. 2004년에 시작된 구글 학술검색은 현재 대다수 학술출판사의 학술지 논문에 대한 편리한 검색 및 접근 도구로 성장하고 있다. 비록 학술지 선택의 기준, 제한된 검색 기능, 독점화에 대한 우려 등이 있지만 구글 학술검색을 대학도서관 데이터베이스의 대안으로 진지하게 주목할 필요가 있다. 대학도서관의 예산 문제, 오픈액세스 출판의 활성화, 구글 학술검색과 같은 무료 도구의 성장은 구독기반 모형을 대체할 수 있는 파괴적인 변화로 인식되고 있으며 대학도서관 사서는 새로운 환경에 대한 구체적인 대응을 고민해야 한다.