• 한국지능시스템학회논문지
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• 제14권3호
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• pp.324-329
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• 2004

에이전트에서 수행할 수 있는 작업들에 대한 처리시간이 실제 작업 전에는 퍼지값으로만 주어지고, 실제 작업이 수행될 때야 작업 시간이 결정되는 다중 에이전트 시스템에 대해서 작업을 에이전트들에 할당하고 스케쥴링하는 작업조정 방법을 제안한다. 제안한 방법은 두 단계의 유전자 알고리즘으로 구성되는데, 상위 단계의 유전자 알고리즘에서는 작업들을 적합한 에이전트에 할당하는 역할을 하고, 하위 단계의 유전자 알고리즘은 첫 번째 유전자 알고리즘의 제시하는 작업 할당 방법에 가장 적합한 작업 스케쥴을 탐색하는 역할을 한다. 이 논문에서는 제안한 유전자 알고리즘 기반 작업 조정 방법을 소개한 다음, 에이전트가 고장 등으로 동작할 수 있는 장애가 발생할 때 처리하는 기법을 소개하고, 제안한 방법을 구현하여 실험한 결과를 보인다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권8호
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• pp.3862-3888
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• 2017

In high diversity node situation, single-channel MAC protocols suffer from many collisions. To solve this problem, the research of multichannel MAC protocol has become a hotspot. And the cyclic quorum-based multichannel (CQM) MAC protocol outperformed others owing to its high frequency utilization. In addition, it can avoid the bottleneck that others suffered from and can be easily realized with only one transceiver. To obtain the accurate performance of CQM MAC protocol, a Markov chain model, which combines the channel hopping strategy of CQM protocol and IEEE 802.11 distributed coordination function (DCF), is proposed. The metrics (throughput and average packet transmission delay) are calculated in performance analysis, with respect to node number, packet rate, channel slot length and channel number. The results of numerical analysis show that the optimal performance of CQM protocol can be obtained in saturation bound situation. And then we obtain the saturation bound of CQM system by bird swarm algorithm (BSA). Finally, the Markov chain model and saturation bound are verified by Qualnet platform. And the simulation results show that the analytic and simulation results match very well.

• Environmental Engineering Research
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• 제24권3호
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• pp.463-473
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• 2019

Nanoscale zero-valent iron (nZVI) has proved to be an effective tool in applied environmental nanotechnology, where the decreased particle diameter provides a drastic change in the properties and efficiency of nanomaterials used in water purification. However, the agglomeration and colloidal instability represent a problematic and a remarkable reduction in nZVI reactivity. In view of that, this study reports a simple and cost-effective new strategy for ultra-small (< 7.5%) distributed functionalized nZVI-EG (1-9 nm), with high colloidal stability and reduction capacity. These were obtained without inert conditions, using a simple, economical synthesis methodology employing two stabilization mechanisms based on the use of non-aqueous solvent (methanol) and ethylene glycol (EG) as a stabilizer. The information from UV-Vis absorption spectroscopy and Fourier transform infrared spectroscopy suggests iron ion coordination by interaction with methanol molecules. Subsequently, after nZVI formation, particle-surface modification occurs by the addition of the EG. Size distribution analysis shows an average diameter of 4.23 nm and the predominance (> 90%) of particles with sizes < 6.10 nm. Evaluation of the stability of functionalized nZVI by sedimentation test and a dynamic light-scattering technique, demonstrated very high colloidal stability. The ultra-small particles displayed a rapid and high nitrate removal capacity from water.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권5호
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• pp.1909-1928
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• 2021

At present, the Colombian government shares information on threats or vulnerabilities in the area of cybersecurity and cyberdefense, from other government agencies or departments, on an ad-hoc basis but not in real time, with the surveillance entities of the Government of the Republic of Colombia such as the Joint Command of Cybernetic Operations (CCOCI) and the Cybernetic Emergencies Response Team of Colombia (ColCERT). This research presents the MS-CSIRT (Management System Computer Security Incident Response Teams) methodology, that is used to unify the guidelines of a CSIRT towards a joint communication command in cybersecurity for the surveillance of Information Technology (IT), Technological Operations (TO), Internet Connection Sharing (ICS) or Internet of Things (IoT) infrastructures. This methodology evaluates the level of maturity, by means of a roadmap, to establish a CSIRT as a reference framework for government entities and as a guide for the areas of information security, IT and TO to strengthen the growth of the industry 4.0. This allows the organizations to draw a line of cybersecurity policy with scope, objectives, controls, metrics, procedures and use cases for the correct coordination between ColCERT and CCOCI, as support entities in cybersecurity, and the different companies (ICS, IoT, gas and energy, mining, maritime, agro-industrial, among others) or government agencies that use this methodology.

• 한국항해항만학회지
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• 제44권6호
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• pp.501-508
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• 2020

본 논문은 현재 한국 해군 잠수함 선석할당방법을 반영하여 기존의 잠수함 선석 할당계획문제를 확장하고 해당문제를 해결하는 정수계획모형을 제안한다. 기존의 잠수함 선석 할당계획 문제는 정박 중 선석 이동과 지원업무 실패를 최소화하면서, 잠수함이 필요한 지원업무가 가능한 선석에 잠수함을 할당하는 것이다. 반면, 한국 해군에서는 선석이동과 지원업무실패 최소화뿐만 아니라 부두 가용자원을 고려하여 잠수함이 요구하는 지원업무의 일정을 최대한 보장하면서, 선석을 할당한다. 따라서 본 논문은 한국 해군의 운용상황에 맞게 기존의 잠수함 선석 할당계획 문제를 확장하고, 부두가용자원의 특징과 잠수함 지원업무 일정의 조율을 포함하는 모형을 제시한다. 제안하는 모형은 선석이동 횟수, 지원업무 지원 실패 횟수, 잠수함 지원업무 요구 일정 조율 횟수를 최소화하는 것을 목적으로 한다. 본 모형의 검증을 위해서 한국 해군의 상황을 바탕으로 고려한 가상의 데이터로 실험을 수행하여 기존의 잠수함 선석 할당계획 문제와 비교·분석한다.

• 인간식물환경학회지
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• 제23권6호
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• pp.589-602
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• 2020

Background and objective: There are many theories related to the development of agrotourism, and each stakeholder has its own role and function. If it is based on organizational functions, stakeholders need to be coordinated, and the state plays a major administrative role. But in the successful case of Yeongdong County, Chungcheongbuk province, the Republic of Korea, the government played an important role in the development of tourism, which grants us another perspective on the role of the government in promotion and development agrotourism activities. Methods: This article aims to examine the development of agrotourism through a cooperative approach, by clarifying the role of the local authorities in the Yeongdong region in the management and operation of the local agrotourism activities. The qualitative research method is based on a field survey conducted in Yeongdong County in 2019. Results: The study's findings show that in situations where conflicts of interest among stakeholders are prone to occur, the development of local tourism has a limited impact on the cooperative culture, and local governments play an important role. Accordingly, the local governments must actively formulate strategies to maintain and develop traditional agricultural industries and at the same time develop agrotourism activities. The government's ability to coordinate, cooperate, and participate reasonably is a key factor for the success of the sustainable development of the tourism industry. Conclusion: Based on coordination between stakeholders and a reasonable strategic direction, Yeongdong's agrotourism is being effectively deployed. The development of Yeongdong's agrotourism industry has achieved impressive results through an effective strategy, highlighting the important role of localgovernment in the consensus of local communities and collaboration with stakeholders. The role of outstanding local governments has been clearly demonstrated, especially in promoting, establishing, and contacting different organizations to effectively deploy agrotourism in the region.

• International Journal of Computer Science & Network Security
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• 제21권12호
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• pp.45-52
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• 2021

The article proves the relevance of developing conceptual frameworks for managing the quality assurance of logistics activities in the context of socio-economic interaction of their participants. It is established that the fundamental difference of the logistic approach in management from traditional approaches is the allocation of a single management function of previously separated, disparate material flows, as well as economic, technological, information integration of chain links into a single system capable of effective management of these flows. It is substantiated that the functioning of the enterprise as a logistics system can be represented in the form of a triad of logistics components, namely: supply logistics, production logistics, sales logistics. Management of quality assurance processes of logistics activities in the context of socio-economic interaction of their participants is a functional component of the entire logistics system due to the quality of work and interaction of all participants in the implementation of certain activities. The quality of logistics activities will affect the level of economic potential, rationalization and optimization of all logistics flows. It is proved that the management of quality assurance processes of logistics activities in the context of socio-economic interaction of their participants involves the following main areas: the introduction of a quality system of logistics processes; development and implementation of the general strategy of quality improvement at the enterprise; internal integration; controlling. Management of quality assurance processes of logistics activities in the context of socio-economic interaction of its participants requires compliance with the following requirements: systematic and comprehensive management of all flow processes; coordination of criteria and indicators for assessing the effectiveness of the entire logistics system; dissemination of the use and application of information technology; ensuring partnerships and close interaction of all participants in sales networks.

• 한국BIM학회 논문집
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• 제12권4호
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• pp.116-127
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• 2022

Building Information Modeling, which was applied mainly in the construction sector, is expanding to the road sector, and the government recently recommends preparing individual application guidelines considering the characteristics of detailed fields such as railways, ports, and complexes through BIM implementation guidelines. Compared to general construction projects, a lot of the works such as signals, electricity, and power, and the railway BIM 2030 roadmap has been presented to apply BIM to railway construction projects that require business consultation and work environment review with various local governments, and pilot projects are in operation. Unlike a general building, in which the construction begins after the detailed design is completed, in the railway project, the detailed design of other works proceeds along with the roadbed construction. Because construction and design work together, railways need to coordinate detailed engineering interfaces such as trajectories, signals, and power, and the application of BIM in design interface coordination has the advantage of maximizing the effectiveness of pre-review. Overseas railway construction projects actively used BIM to adjust design interfaces and had a collaboration process to modify BIM models and create construction details from the revised models through regular meetings with suppliers. Therefore, this study aims to derive the factors necessary for establishing a BIM collaboration environment based on a survey of practitioners as a preliminary step for establishing the BIM collaboration process of the railway construction project.

• 디지털융복합연구
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• 제20권1호
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• pp.379-389
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• 2022

본 연구는 중환자실 전담간호사 역할에 대한 중환자실 의료인의 중요도와 만족도를 파악하기 위하여 시행되었다. 일개 기관의 4개 단위 내·외과계 중환자실 소속 의사, 간호사 총 138명을 대상으로 2021년 5월 3일부터 29일까지 설문을 시행하였다. 수집한 자료는 기술통계, t-test, Importance-Performance Analysis(IPA) 방법을 사용하여 분석하였다. 중환자실 전담간호사의 역할에 대한 중요도는 5점 만점에 의사 4.18점, 간호사 3.95점, 만족도는 5점 만점에 의사 4.39점, 간호사 3.85점으로 중요도(t=2.33, p=.024)와 만족도(t=5.43, p<.001)가 두 군에서 모두 통계적으로 유의한 차이가 있었다. 두 직종 모두 전문간호실무, 전문직 활동, 조정협동, 교육상담, 연구 순으로 중요도와 만족도 순위가 일치하였다. 집중개선 영역으로는 의사는 실무 표준 및 가이드라인 개발, 전문가 역할 모델과 자기 개발과 환자/가족 교육으로 나타났고, 간호사는 의료진 교육으로 평가하였다. 중환자실 전담간호사 역할에 대하여 전문성을 강화하고, 개선이 필요한 부분의 역량을 증진시키는 전략이 필요하다고 생각된다.

• 국제학술발표논문집
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• The 7th International Conference on Construction Engineering and Project Management Summit Forum on Sustainable Construction and Management
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• pp.138-145
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• 2017

As that experienced in other developing countries, Mongolia has already faced multilateral side issues for two decades due to economic growth that created Ger areas or internationally 'Slum', public housing and living conditions for low-income citizens, on the basis of rapid migration from rural areas to urban. Ger areas appear to be the main cause of environmental pollution problems and impending comfortable living conditions of the city's residents by covering more than half area of Ulaanbaatar city. Also, the spread of the Ger areas has many side issues such as prevention of urban development and unaesthetic. Most inhabitants of the areas are on low-incomes, and living in the detached houses or felt yurts (Ger) usually build within a low budget, by themselves or unprofessional people, and by using materials of poor quality. Therefore, Ger areas are an inevitable issue that requires effective, proper and immediate housing policy coordination under the government and even the housing market. Unfortunately housing policies, laws, and projects adopted by Mongolian government have shown inefficient results. The government housing policies, unlike other developing countries did not target low-income households' housing which is the priority issue for two decades. But only in 2014, the Long-term housing policy with the strategy for affordable housing initiated the housing policy for low-income households. This policy has five main broad directions such as redevelopment of Ger area, the land readjustment, public rental housing, new settlements and new city and reconstruction for old apartments, which are rather general and would require tremendous financial resources if each of the directions is implemented simultaneously without prioritization. Therefore this research aims to suggest the efficient and adequate housing policy direction for the low-income households in Ger area based on achievement of other developing countries' strategies, performances and generic characteristic with explanatory models. Also, this research adopts a literature analysis method that uses various research reports, related papers in domestic and international journals, and theses by experts, researchers, public institutions, and agencies.