• 대한산업공학회지
• /
• 제39권4호
• /
• pp.313-324
• /
• 2013

Healthcare optimization is mandatory to strengthen the competitiveness of domestic healthcare industry. Healthcare optimization aims to increase service quality, patient safety, and system efficiency. This paper reviews various healthcare optimization cases of developed countries, synopsizes the current status of domestic healthcare industry, points out several reasons why healthcare optimization is not active in Korea, and suggests some vitalization ways.

• 대한안전경영과학회지
• /
• 제14권4호
• /
• pp.211-218
• /
• 2012

In this paper, we propose a system architecture of the AMI to be applied in the modern agricultural sector. Agricultural electricity costs in South Korea is very inexpensive compared with other industries. It is expected to increase oil prices to rise over the medium to long term so the facilities must to be installed for farmers in terms of energy savings and energy costs. The research and development of plant factory which can replace the ills of modern agriculture is very active. The technologies of smart grid and plat factory are good paradigm of next generation agricultural sector. Good use of smart grid technologies, the traditional energy consumption industries, agriculture sector can be self-sufficiency industry. In this article the AMI architecture is developed and it will be applicable for modern farmers plant factory.

• 아태비즈니스연구
• /
• 제10권3호
• /
• pp.37-51
• /
• 2019

In this paper, we investigate the performance of anomaly factors in Asia-Pacific Stock market and show the higher Sharpe ratio of the volatility managed smart beta portfolio. The smart beta portfolio combines the benefit of passive strategy and active strategy. However, the smart beta portfolios are seems to be exposed to the risk of anomaly factors from the perspective of traditional financial equilibrium model. Therefore, the smart beta strategy may generate negatively skewed returns unappealing to investors having lower risk tolerance. Our empirical investigations find that the return of the Asia-Pacific region stock market is more volatile than other regions with the lower efficiency ratio. However, the value factor and the momentum factor of Asia-Pacific region both show good performances. More interestingly, we also find that managing the volatility of the momentum factor in Asia-Pacific stock market almost doubles the efficiency ratio.

• Journal of Oral Medicine and Pain
• /
• 제47권3호
• /
• pp.161-166
• /
• 2022

Oral lichen planus (OLP) is a chronic oral mucosal disease affecting the buccal cheek, tongue, palate, lip, and gingival mucosa. Lesions in the gingiva make it difficult to control dental plaque due to pain. As a result, the disease is often accompanied by gingivitis or periodontitis. If OLP and dental plaque are not properly managed, the patient's periodontal condition will worsen. Thus, clinicians treating OLP should emphasize periodic visits and dental plaque control. Here, we report the management of a patient who struggled with OLP for 20 years and discuss the importance of periodic regular observations and active periodontal management.

• 국제학술발표논문집
• /
• The 1th International Conference on Construction Engineering and Project Management
• /
• pp.881-885
• /
• 2005

Scheduling repetitive projects under limitations on the amounts of available resources (labor and equipment) has been an active subject because of its practical relevance. Traditionally, the limitation is specified as a deterministic (fixed) number, such as 1000 labor-hours. The limitation, however, is often exposed to uncertainty and variability, especially when the project is lengthy. This paper presents a stochastic optimization model to treat the situations where the limitations of resources are expressed as probability functions in lieu of deterministic numbers. The proposed model transfers each deterministic resource constraint into a corresponding stochastic one and then solves the problem by the use of a chance-constrained programming technique. The solution is validated by comparison with simulation results to show that it can satisfy the resource constraints with a probability beyond the desired confidence level.

• 국제학술발표논문집
• /
• The 9th International Conference on Construction Engineering and Project Management
• /
• pp.800-807
• /
• 2022

This study aims to review the use of graph databases in construction research. Based on the diagnosis of the current research status, a future research direction is proposed. The use of graph databases in construction research has been increasing because of the efficiency in expressing complex relations between entities in construction big data. However, no study has been conducted to review systematically the status quo of graph databases. This study analyzes 42 papers in total that deployed a graph model and graph database in construction research, both quantitatively and qualitatively. A keyword analysis, topic modeling, and qualitative content analysis were conducted. The review identified the research topics, types of data sources that compose a graph, and the graph database application methods and algorithms. Although the current research is still in a nascent stage, the graph database research has great potential to develop into an advanced stage, fused with artificial intelligence (AI) in the future, based on the active usage trends this study revealed.

• 국제학술발표논문집
• /
• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
• /
• pp.439-444
• /
• 2011

As construction projects have been getting larger and more complex, a single individual or organization cannot have complete knowledge or the abilities to handle all matters. Collaborative practices among heterogeneous individuals, which are temporarily congregated to carry out a project, are required in order to accomplish project objectives. These organizational knowledge creation processes of project teams should be understood from the active and dynamic viewpoint of how they create information and knowledge rather than from the passive and static input-process-output sequence. To this end, agent-based modeling and simulation which is built from the ground-up perspective can provide the most appropriate way to systematically investigate them. In this paper, agent-based modeling and simulation as a research method and a medium for representing theory is introduced. To illustrate, an agent-based simulation of the evolution of collaboration in large-scale project teams from a game theory and social network perspective is presented.

• Asia pacific journal of information systems
• /
• 제29권3호
• /
• pp.489-502
• /
• 2019

The WeChat mini program is an application embedded in WeChat that users can use without downloading and installing. After it was officially released in 2017, many travel enterprises have launched their own mini programs on the WeChat platform. This study applies affordance theory to investigate the WeChat mini program's role in tourism activities through social network analysis using the R programming language. The authors searched the topic of "how do you perceive the travel-related WeChat mini program" and then crawled the 200 comments found; 180 comments were analyzed after data cleansing. The results show that travel-related WeChat mini programs play a very important role in Chinese social network tourism activities. This paper found that WeChat played a more active role in various tourism-related interactions with Chinese social networks. Moreover, the results show how affordance theory is applied to the use of WeChat mini programs.

• 한국양식학회지
• /
• 제21권4호
• /
• pp.252-258
• /
• 2008

전라남도 여수시 소라면 여자만에서 2007년 3월부터 2008년 2월까지 채집된 새꼬막 Scapharca subcrenata의 생식소 발달과 생식주기를 조직학적으로 조사하였다. 새꼬막은 자웅이체로 난소는 많은 난소 소낭(oogenic follicle)으로 이루어져 있으며, 정소도 많은 정소 소낭(acinus)으로 구성되어 있다. 생식소지수(GI)는 6월에 연중 최고 값을 나타내었고, 그 후 감소하여 7월에 최저 값를 나타내었다. 비만도지수(CI)는 4월에 연중 최고 값을 보였고, 그 후 감소하여 7월에 최저 값을 보였다. 새꼬막의 생식주기는 초기 활성기($1{\sim}4$월), 후기 활성기($3{\sim}6$월), 완숙기($5{\sim}8$월), 방출기($7{\sim}9$월) 그리고 회복 및 휴지기($9{\sim}3$월)의 연속적인 발달 단계로 구분되었으며, 주 산란기는 $7{\sim}8$월로 조사되었다. 암, 수 성비는 1:1로 유의한 차를 보이지 않았다.

• 한국정보통신학회논문지
• /
• 제21권6호
• /
• pp.1161-1166
• /
• 2017

최근 디스플레이 기술 발전과 함께 AMOLED(Active Matrix OLED) 패널(Panel)의 생산과 수요가 급증하고 있다. AMOLED 패널은 기본적으로 LCD와는 다르게 백라이트(Backlight)를 필요로 하지 않아 적은 소비전력으로 선명도 있는 영상의 출력이 가능하다. 따라서 세계적으로 AMOLED 시장이 커지고 있다. 이에 따라 생산에 필요한 검사 장치의 수요도 확산되고 있다. AMOLED 패널 에이징(Aging) 시스템의 검사 장치는 MES(Manufacturing Execution System), MIS(Management Information System)와 연동하여 운영되며, 네트워크 환경을 구축하는 것이 효율적이다. 패널 에이징에 사용되는 검사 장치는 다중 신호를 출력하는 기능을 가진 신호 생성기(Pattern Generator)이다. 다수개의 신호 생성기를 운영하기 위해서는 효율적인 설계가 필요하다. 이를 해결하기 위해 본 논문에서는 신호 생성기를 원격으로 통합 제어하기 위한 방법과 AMOLED 패널을 구동시키기 위한 방법을 제안하고 이를 구현하였으며, 이에 따른 타이밍과 전원 설정 결과를 제시하였다.