• 한국수학교육학회지시리즈A:수학교육
• /
• 제49권1호
• /
• pp.67-83
• /
• 2010

The purpose of this study was to analyze the research trends of elementary mathematics education with regard to the topics, methods, subjects, and mathematical contents of such research. For this purpose, the papers published in domestic journals during the recent 5 years (2004-2009) were analyzed. A total of 383 papers from 8 professional journals were analyzed with the 4 criteria. First, the frequent research topics included instructional design and methods, learners' perspectives and abilities, and analysis of curriculum and textbooks in order. Second, qualitative research methodology was used twice as many as quantitative one. Whereas a survey was the most frequent quantitative research method, content analysis and case study were for qualitative methods. Third, research subjects included mainly typical students, specifically fifth and sixth graders. Papers dealing with lower graders or low-achievers as well as pre-service teachers were rare. Lastly, whereas the research on geometry as well as number and operations was active, that of measurement as well as probability and statistics was not. On the basis of these results, this paper includes several implications for the future research direction in elementary mathematics education.

• 한국항공운항학회지
• /
• 제23권2호
• /
• pp.21-31
• /
• 2015

The world air transport industry has grown steadily with quantitative expansion. The volume of air transport in the world is skyrocketing with the open-sky trend. Air passengers from or to South Korea has shown 5% of annual growth for the last couple of decades which caused South Korea now ranking in 18th in the World for air transport market size. Quantitative expansion of Air transport affects in policy making of air transport operators, such as airports, airlines or authorities, directly and indirectly. Especially, Aviation Safety field should be supported by policy regime with the growth of air transport volume, assured resources for continuous monitoring is standing out as a vital factor. This study is to estimate social costs caused by aviation accidents and investment costs for aviation safety by airports, airlines and authorities as operators. Estimated investment costs for aviation safety verified by comparing and analysing them. Precedent studies were reviewed to refer research methodology to calculate aviation accident costs and safety costs of operators. Safety costs of operators was calculated with literature researches and interview surveys among professionals of each operators in rational range.

• Asia pacific journal of information systems
• /
• 제14권1호
• /
• pp.59-77
• /
• 2004

Even though B2B EC is becoming popular, there have been not so much studies about performance evaluation methodology for B2B systems. In this paper, after analyzing buyer-carts systematically focusing on the buyer's interactional efforts on the typical buying processes of each buyer-cart, we propose a quantitative performance evaluation model. For this, we categorize buyer-carts in B2B EC as s-cart, i-cart, and b-cart depending upon its residing sites: seller, intermediary, and buyer sites. And after proposing the desired features of buyer-carts in B2B EC as identification, collection, trashing, ordering, payment, tracking, recording, purchasing decision support, and transmission of records to e-procurement systems, we derive a performance evaluation model by calculating detail sub-processes from the desired features' viewpoints. By setting variables from a survey on the actual condition of using buyer-carts in companies in Korea, we try to evaluate the performance of buyer-carts in B2B EC. In this paper, we suggest a new methodology of performance evaluation for B2B systems, and show that the b-cart platform is more efficient than other buyer-carts especially in B2B EC.

• 한국의류학회지
• /
• 제22권7호
• /
• pp.952-962
• /
• 1998

본 연구의 목적은 지난 20여 년간 발표되었던 복식사 연구 논문의 연구방법을 검토, 분석함으로서 복식 연구의 학문적 기초를 다지며, 아울러 미래의 복식 연구가 나아가야 할 바람직한 연구 방향을 모색하는데 있다. 본 연구를 위하여 1977년부터 1996년 사이 미국의 복식관련 학술지에 발표된 총 34편의 복식 연구논문을 수집하여, 각 논문의 연구방법과 주제, 사용된 자료, 다른 학문과의 연계성에 관한 내용을 분석하였다. 본 논문에서는 복식연구의 방법을 질적(Qualitative)연구방법으로 서술형(Narrative)과 해석형(Interpretive), 그리고 양적(Quantitative) 연구방법의 세 가지 유형으로 분류하여 분석하였다. 본 연구의 결과에 의하면, 복식학자들은 복식사가 갖는 다른 여러 학문영역과의 연계성(Interdis-ciplinary nature)으로 인하여, 광대한 연구주제에 따라, 각종 연구자료를 이용하여, 여러 학문적 관점에서, 다양한 연구 방법을 적용시켜 왔던 것을 알 수 있다. 적절한 연구방법의 선택은 각 논문에 따라 연구자의 의도, 주어진 연구주제, 가능한 모든 자료를 근거로 하여 결정되어야 하며, 하나의 논문 내에서도 각 부분에 적합한 여러 연구방법을 병행하여 사용함으로서 가장 효과적으로 연구의 목적을 달성할 수 있어야 한다.

• Nuclear Engineering and Technology
• /
• 제34권3호
• /
• pp.259-267
• /
• 2002

NFPA-803 has been referred as the Fire Protection Standard at the Nuclear Power Plants of Pressurized Water Reactor. This Standard has been used as the fire protection regulation, containing prescriptive requirements with deterministic methodology. Recently, with cumulative efforts by the U.S. Nuclear Regulatory Commission and Utilities in America to establish a new Standard, including a quantitative evaluation methodology, NFPA-805, the Performance-Based Standard for FIRE Protection for Light Water Reactor Electric Generating Plants was issued and approved by the American National Standards Institute as an American National Standard with an effective date of February 9, 2001. This paper presents an analysis result from the computer modeling for the fire simulation In addition, it proposes the idea that this kind of analytic method can be available for the facilities design of fire prevention and protection fields, as well as an evaluation for the fire suppression system with a quantitative analysis for the thermal phenomena in fire compartments in Nuclear Power Plants.

• 대한가정학회지
• /
• 제45권5호
• /
• pp.25-38
• /
• 2007

This study sought to analyze the trends in research on Korean fathers with young children. In this study, journal articles related to child and family studies, early childhood education and childcare published between 1980 and 2006 were analyzed for research frequency, content, and methodology. The study results were as follows. First, 56 research articles on Korean fathers with young children were published during this period of time. Second, the research was primarily focused on fathering attitudes and the relationships between the characteristics of the father and the development of the child. Third, the majority of the studies used methods categorized as quantitative and non-experimental: the subjects included more than 100 fathers with 3-5-year-old children. Research instruments validated in foreign countries (52.4%), surveys (75.4%), and quantitative data analysis methods (98.2%) were primarily used in these research studies. Finally, the results of this study suggest that further studies concerning Korean fathers with young children need to be conducted according to current research trends, content, and methodology.

• 산경연구논집
• /
• 제14권10호
• /
• pp.23-33
• /
• 2023

Purpose: This paper provides a literature review of both qualitative and quantitative research on service delivery in urban local authorities as portrayed in literature and offers more insight into the concept thereby developing and facilitating an improved understanding of service delivery and proffering strategies for improving service delivery in urban local authorities. Research design, data and methodology: The study adopted a desktop research methodology. Empirical and theoretical research and articles which are relevant to service delivery in urban local authorities are reviewed and analysed. Only secondary information gathered through those articles and research is used to analyse and build literature review on service delivery in urban local authorities. Results: a literature review of both qualitative and quantitative research on service delivery in urban local authorities as portrayed in literature proffering strategies for improving service delivery in urban local authorities. Conclusions: It is evident that service delivery is an area which needs more attention, especially in developing countries. The service delivery environment is also changing rapidly, calling for strategies to match such changes. This paper facilitates an improved understanding of service delivery, proffering strategies for improving service delivery in urban local authorities. These strategies are essential in improving service delivery challenges.

• 산경연구논집
• /
• 제15권2호
• /
• pp.19-30
• /
• 2024

Purpose: This paper provides both quantitative and qualitative literature review on employee engagement in State Owned Enterprises (SOEs) as portrayed in literature and offers more insight into the concept on how it can be optimised. Research design, data and methodology: The study adopted a desktop research methodology. A review and analysis of both theoretical and empirical research and articles which are relevant to employee engagement in SOEs was conducted. Only secondary information gathered through those articles and research was used to analyse and build literature review on employee engagement in SOEs. Results: A literature review of both qualitative and quantitative research on employee engagement in organisations generally and in SOEs particularly was done, and it indicated the positive relationship between employee engagement and organisational performance. From the study, it is evident that employee engagement is not optimal around the world, therefore it is an area which needs more attention. Hence, this study proffered strategies for enhancing employee engagement in SOEs. Conclusions: This study proffers strategies for optimising employee engagement in SOEs. These are brand image, work environment, management and leadership characteristics, training and development opportunities, performance management, work life balance, effective communication and Kahn's three factors of meaningfulness, safety and availability. These strategies are essential in optimising employee engagement as portrayed in the reviewed literature.

• 정보보호학회논문지
• /
• 제23권3호
• /
• pp.445-457
• /
• 2013

본 논문은 제어시스템에서 사이버 위협과 취약성을 평가하기 위한 정량적 모델링에 관한 연구이다. SCADA(supervisory control and data acquisition) 시스템은 대표적인 제어시스템이고 전력계통에서 가장 큰 규모를 형성하고 있다. SCADA 시스템은 초기에는 지역적으로 고립된 시스템이었으나 통신 및 제어기술이 발전하면서 광역으로 확대되어 왔다. 스마트그리드는 에너지 시스템과 IT 시스템을 통합하는 것이며, 이러한 통합의 과정에서 IT 시스템 상에서 존재하던 위협이 제어시스템으로 옮겨오게 된다. 전력시스템은 실시간 특성이 강하게 요구되며, 이는 전력시스템의 사이버 위협을 IT 시스템에 비해 보다 복잡하고 치명적으로 만드는 요인이 된다. 예를 들어, 기밀성이 IT시스템에서 가장 중요한 요소인데 반해 가용성은 제어시스템에서 가장 중요한 고려 사안이다. 이러한 맥락에서, 보다 체계적인 방식으로 전력시스템의 사이버 위험을 평가하는 과정이 요구된다. 일반적인 관점에서 위험이란, 위협, 취약성, 자산의 곱으로 산출되며 본 연구는 전력시스템 구성요소 별로 위험을 정량적으로 분석할 수 있는 프레임워크를 제안한다.

• 한국안전학회지
• /
• 제31권5호
• /
• pp.141-148
• /
• 2016

There exists required safety integrity level (SIL) to assure safety in accordance with international standards for every electrical / electronics / control equipment or systems with safety related functions. The SIL is allocated from lowest level (level 0) to highest level (level 4). In order to guarantee certain safety level that is internationally acceptable, application of methodology for SIL allocation and demonstration based on related international standards is required. Especially, in case of the SIL allocation method without determining of quantitative tolerable risk, the additional review is needed to check whether it is suitable or not is required. In this study, the quantitative risk reduction model based on the safety integrity allocation results of railway platform screen door system using Risk Graph method has been examined in order to review the suitability of quantitative risk reduction according to allocated safety integrity level.