• KSII Transactions on Internet and Information Systems (TIIS)
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• 제18권5호
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• pp.1223-1237
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• 2024

Autonomous vehicles use onboard sensors to sense the surrounding environment. In complex autonomous driving scenarios, the detection and recognition capabilities are constrained, which may result in serious accidents. An efficient way to enhance the detection and recognition capabilities is establishing collaborations with the neighbor vehicles. However, the collaborations introduce additional challenges in terms of the data heterogeneity, communication cost, and data privacy. In this paper, a novel personalized federated learning framework is proposed for addressing the challenges and enabling efficient collaborations in autonomous driving environment. For obtaining a global model, vehicles perform local training and transmit logits to a central unit instead of the entire model, and thus the communication cost is minimized, and the data privacy is protected. Then, the inference similarity is derived for capturing the characteristics of data heterogeneity. The vehicles are divided into clusters based on the inference similarity and a weighted aggregation is performed within a cluster. Finally, the vehicles download the corresponding aggregated global model and train a personalized model which is personalized for the cluster that has similar data distribution, so that accuracy is not affected by heterogeneous data. Experimental results demonstrate significant advantages of our proposed method in improving the efficiency of collaborative perception and reducing communication cost.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2009년도 학술대회
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• pp.221-226
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• 2009

Not many years ago, people found the contemporary technology expensive and difficult to use in collaborative type of meetings. Today, with the technology advanced to high standards and accessible at cheaper price, its adaption is becoming more and more ubiquitous with wide range of applications. Today's meeting rooms are not just plain old telephone systems with microphones and speakers. Today's meeting rooms are smart and intelligent. They can identify the participants; they can provide natural view of remote participants; they can proactively manage resources for collaboration and so on. More effective collaboration is possible with deployment of devices like high-definition cameras, advanced displays, sensors, gigabit networks, trackers, pointers, and high-end audio devices. Devices alone are not enough in the meeting rooms. We need software infrastructure to manage the devices and meeting contexts. One such software infrastructure is SMeet, a Smart Meeting space, which we have developed to provide an effective multi-party remote collaboration environment. Networked display systems are used in such advanced collaboration environment for better visualization. In this paper we discuss a novel approach to control and manage networked display systems in SMeet environment.

• World Technopolis Review
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• 제7권1호
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• pp.2-14
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• 2018

Nowadays, we are standing in front of the $4^{th}$ Industrial Revolution that is featured by a great range of new and advanced technologies that influences all the domains of economies and industries. The great question that this revolution raises is how it can lead to a future that reflects the peoples' common objectives and values on how these advanced technologies can affect the life and transform the economic, social, cultural, and human environment. It is commonly agreed that to be adapted to these changes and needs and shape a society with competitive economies with highly-skilled individuals, we need to encourage innovation, entrepreneurship, new knowledge generation and exchange and true and effective collaboration and communication. In this complex scene, education seems to have a central and critical role on finding new ways of developing expertise and innovation within the existing knowledge procedures, with more and better cooperation between the key players. This paper argues the concepts, opportunities and challenges that are related to the learning ecosystem towards the needs raised by the $4^{th}$ Industrial Revolution. The education is discussed as catalyst but also as carrier of innovation and innovation practices and the basis of a relevant framework is presented that takes into account all the aspects, domains and key players of educational world and interacting domains. Having introduced the ideas of innovation, collaboration and technology advancement in this environment, this paper also presents a real case of practice, focusing on how more than 5.000 schools around Europe succeeded the last four (4) years to implement innovation activities in a collaborative way and under a unique but also flexible pedagogical innovation framework.

• 융합보안논문지
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• 제17권5호
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• pp.57-61
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• 2017

국가 연구망(National Research Network)은 각국의 첨단과학기술을 지원하기 위해 존재한다. 국가 연구망은 각 분야의 과학기술에 대한 요구사항을 충족하여야 하며, 지속적으로 변해가는 주변 환경에 대해서 끊임없이 발전해 나가야 한다. 최근 데이터 중심의 과학기술 연구형태에 따른 수요가 증가하고 있으며, 이러한 수요에 대응하기 위해 선진 국가 연구망들은 중장기적인 전략을 수립하고 있다. 본 논문에서는 선진 연구망에 대한 현황과 국가 연구망 동향 및 요구사항을 연구망환경의 변화, 과학/기술의 변화, 산업과 삶의 변화의 관점에서 분석하였다. 또한 분석한 요구사항에 대응하기 위해 미래형 네트워크 백본 구축, 사용자 중심의 협업 연구 환경 제공, 글로벌 협업 네트워크 서비스 제공, 첨단과학기술 연구데이터 정보 보호 서비스 제공 등에 관해 중장기 발전 방향 및 방안을 제시한다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1999년도 제14차 학술회의논문집
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• pp.177-180
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• 1999

Nowadays, one of the major technical issues in manufacturing is to create an environment to promote collaboration among diverse engineering activities. Collaborative engineering is an innovative approach integrating widely distributed engineering activities through promoting information sharing and actual collaboration. It requires close interactions among developers, suppliers and customers, and consideration of entire product life cycle from concept to disposal. A carefully-designed operating system is crucial for successful collaboration of many different activities in a Networked Virtual Manufacturing System(NVMS). High extensibility, flexibility and efficiency ale the key characteristics requested of an operating system to handle the complexity of the NVMSs. In this paper, we propose a model of the operating system for collaborative engineering using concurrent quasi-procedural method(QPM). QPM is a goal-driven data management technique for distributed and parallel computing environments. It is to be applied to the evaluation of activities to be executed, validities of input data, execution path of activities for a needed output, and expected to greatly improve the productivity of operations by preventing redundant evaluations. Collaboration among many different engineering activities in NVMSs is to be performed by the network of agents that encapsulate the capabilities of both users and their tools.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2021년도 춘계학술발표대회
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• pp.59-61
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• 2021

고성능 네트워크를 기반으로 하는 과학응용 협업연구 환경에서 대용량 데이터의 고속 전송을 위해 활용되고 있는 전용의 데이터 전송 노드는 이용률을 감안하여 연산을 위한 부수적인 목적을 위해 활용이 가능하다 본. 논문에서는 이러한 분산된 데이터 전송 노드들을 활용한 컨테이너 기반 협업연구 플랫폼의 구성 사례를 소개하고 해당 플랫폼 상에서 분산 학습을 실험하고 소요시간 측면에서 성능을 측정하여 제시한다.

• International Journal of Advanced Culture Technology
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• 제10권2호
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• pp.43-52
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• 2022

This study used a descriptive survey design to examine the impact of the clinical learning environments and learning transition nursing students experienced the gerontological nursing clinical on the satisfaction with clinical practice. A convenient sample of 211 4^th year nursing students who had the gerontological nursing clinical practicum from one College of Nursing at Private University in South Korea was recruited and completed the surveys from October to December 2019. This study showed that the satisfaction with a gerontological nursing clinical practicum was significantly correlated with clinical learning environments and learning transition. The results of this study highlights the need to create a safe and positive clinical learning environment for quality gerontological nursing clinical practicum, so hospitals and nursing schools need to make efforts to promote clinical sites as an educational learning environment in collaborative relationships.

• 한국CDE학회논문집
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• 제15권6호
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• pp.425-439
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• 2010

The current challenge with which most shipyards are forced is to reduce the design time and the time-to-delivery because of explosive order of shipbuilding. Collaborative design and product data management have become important to reduce the lead time. Furthermore, enterprise information technologies such as ERP (Enterprise Resource Planning), SCM (Supply Chain management), and APS (Advanced Planning System) requires the collaborative environment. Also, manufacturing environment has been considered as a topic of strategic interest to get shorter product lifecycles in shipyards. Most shipyards have chosen an environment of ETO (Engineering To Order) strategy which designs and produces new products in response to various requirements of customer, rules and regulations. In the ATO (Assemble 10 Order) environment, most component parts have been designed to be procured or produced on the order requirement. The basic distinction between the ETO and ATO is the timing of the design. Thus in the ATO environment, it is more flexible in reducing the lead time to meet the specified requirements of customers. However, the ETO strategy requires new ship design process and ship product structures that are linked with the implementation of PLM. And, the function and architecture of current PLM solution has been designed based upon ATO environment properly. This paper presents the PLM architecture which effectively reflects the characteristics of shipbuilding. 4-layer architecture model is suggested to implement the PLM system. Also, implemented functions of ship PLM is explained in order to make a practical guidance for ship PLM implementation.

• 한국콘텐츠학회논문지
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• 제12권10호
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• pp.11-21
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• 2012

하이브리드 네트워크 인프라는 Internet2, SURFNet 등의 선도 연구망 커뮤니티에게 가장 우선적인 기술로 대두되고 있다. 그러나, 첨단(high-end) 응용의 종단 간 협업 연구를 위하여 필수적인 하이브리드 연구망 간의 인터도메인 협업 인프라는 실질적인 아키텍쳐의 설계와 구현에 있어서 아직도 많은 연구를 필요로 하고 있다. 따라서 본 논문에서는 하이브리드 연구망 기반의 분산 가상형 네트워크 운영과 리소스 정보 관리를 위한 프레임워크를 제안하고, 이를 기반으로 코어 시스템을 구현하였다. 제안된 프레임워크는 멀티도메인 하이브리드 연구망 운영과 관리를 위하여 분산형 아키텍쳐로 설계되었다. 분산 가상형 네트워크 운영 프레임워크는 네트워크 도메인 내에서 자치성과 독립적인 제어를 유지하면서 인터도메인 네트워크 간의 협업을 가능케 함으로써, 연구자 및 실험자가 스스로 생성한 가상 네트워크를 운영 관리 할 수 있는 환경을 제공할 수 있다. 본 논문에서는 제안된 프레임워크를 위한 세부적인 구조와 기술을 다루며, 이러한 환경이 어떻게 고성능 첨단(high-end) 응용을 위하여 활용될 수 있는지에 대하여 고찰한다.

• 한국정보교육학회:학술대회논문집
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• 한국정보교육학회 2011년도 동계학술대회
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• pp.167-173
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• 2011

현재 우리 사회는 웹 1.0 시대를 지나 웹 2.0 이라는 새로운 웹 패러다임으로 진화하고 있다. 웹 2.0의 가장 큰 특징은 개방, 참여, 공유의 세 가지의 정신을 다양한 형태로 실현한다는 것이다. 이러한 웹 2.0을 가장 대표하는 것이 바로 위키이다. 위키는 온라인상에서 다수의 컴퓨터 사용자가 서로 연결되어 자유롭게 서로의 글을 공동 편집할 수 있도록 구현된 동적 프로그래밍 도구이다. 그러므로 온라인상에서 학생들간 협력학습을 구현해 내는데 있어서 아주 효과적일 수 있고 그러한 협력학습을 하는 과정에서 학생들은 자연스럽게 긍정적인 상호작용 기술들을 습득하게 될 것이다. 즉, 본 연구는 이러한 위키를 통한 초동학생들의 온라인 협력학습 과정이 공격적이고 비판적인 성향이 강한 학생들에게 필요한 배려심, 너그러움 등의 긍정적인 상호작용 기술을 습득하도록 하는데 도움을 줄 수 있다는 결과를 제시하고자 한다.