• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.82-84
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• 2001

워크플로우 시스템에서 중요한 기능은 정의된 규칙, 절차 및 조건에 의한 작업흐름을 자동화하는 것으로 정보처리의 이동성을 고려하여야 한다. 특히, 최근에는 웹 환경의 확대에 따라 분산시스템에 대한 관심이 높으며, 분산시스템에서의 워크플로우 프로세스는 다른 노드에서도 태스크 처리가 가능해야 하고 실시간 처리가 요구된다. 또한 분산시스템을 구성하는 노드에서의 결함 발생은 전체 작업처리 효율을 저하시키므로 결합이 허용되는 분산 시스템에 적합한 워크플로우 엔진이 필요하다. 본 논문은 워크플로우 시스템이 분산시스템 환경에서 수행될 때, 결함을 허용하며 작업을 자동으로 처리하여 전체 프로세스의 처리율을 향상시킬 수 있는 태스크 할당 알고리즘을 설계하고, 태스크의 수행 보증율을 통해 분석한다.

• Korean Journal of Computational Design and Engineering
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• v.13 no.6
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• pp.412-420
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• 2008

In order to design the large complex structures like VLFS (Very Large Floating Structures), it is essential the cooperation between the experts in various fields; structural engineering expert, fluid mechanics expert, mooring system engineer, and so on. This paper describes the development of an integrated system to support the cooperative design between various experts and project manager. This integrated system is designed to be operated in Web environment and it contains the support of design DB and 3D graphical tool, negotiation tool for task allocation, and various engineering supporting tools for each design step. The user group of this system can be classified as Project Manager, Engineering Expert, DB Builder, and System Administrator. All of the engineering data is saved after and during the process of the design projects and all participants can be connected by Internet without the limit of time or space constraints.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.04a
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• pp.153-155
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• 2015

다양한 과학 응용들은 데이터들을 처리하기 위해 높은 효율성을 제공하는 클라우드 인프라를 활용한다. 이 때 클라우드 컴퓨팅 환경에서 작업을 효율적으로 스케쥴링하는 것은 작업 처리 성능, 자원 활용을 및 작업 처리 시스템의 처리량에 큰 영향을 미친다. 본 논문에서는 클라우드 인프라에서 제공된 자원이 갖는 성능의 변동을 고려하여 사용자의 작업 완료 시간에 대한 품질 제약을 만족시키기 위한 작업 스케쥴링 기법을 제시하였다. 성능 평가를 통해 작업 지연이 발생한 상황에서 본 논문에서 제안한 작업 복제를 이용한 워크플로우 스케쥴링 기법을 활용했을 때, 작업 복제를 이용하지 않았을 때에 비해 효과적으로 요청된 워크플로우 종료 시간 내에 처리를 수행하는 것을 확인할 수 있었다.

• Archives of design research
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• v.17 no.3
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• pp.245-254
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• 2004

In Accordance with the change of design paradigm, the design process has changed into user-centered workflow from designer-centered workflow. Since the purpose of the past research methods is quantitative analysis or the understanding of the present situation, it doesn't fit in practical design that expressed the user's needs. Therefore, the real data about what they see and how they feel will be useful for the user-centered design. This paper's objective is to analyze eye-movement recordings and pupil size of user for mobile interface design. For this objective, it was experimented on that the user's eyegaze data of using a mobile phone by the Eyegaze Interface System, and analyzed three levels of user's task performance. The results provided evaluation of new developed and old existing interface design of mobile phone by the experiment of eye-movement recordings and pupil size. The benefit of results is compliment of the limitation of current usability test through visual characteristics of design and qualitative data of user.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.95-102
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• 2007

This paper presents the core technology of Construction Business Process Automation to model and automate construction business processes. Business Process Reengineering (BPR) and Automation (BPA) have been recognized as one of the important aspects in construction business management. However, BPR requires a lot of efforts to identify, document, implement, execute, maintain, and keep track thousands of business processes to deliver a project. Moreover, existing BPA technologies used in existing Enterprise Resource Planning (ERP) systems do not lend themselves to effective scalability for construction business process management. Application of Workflow and Object Technologies would be quite effective in implementing a scalable enterprise application for construction business processes by addressing how: 1) Automated construction management tasks are developed as software components, 2) The process modeling is facilitated by dragging-and dropping task components in a network, 3) Raising business requests and instantiating corresponding process instances are delivered, and 4) Business process instances are executed by using workflow technology based on real-time simulation engine. This paper presents how the construction business process automation is achieved by using equipment reservation and cancellation processes simplified intentionally.

• Korean Journal of Computational Design and Engineering
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• v.12 no.4
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• pp.308-320
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• 2007

A multi-agent and web based engineering framework concerning the automation of fatigue durability analysis for welded bogie frame of railway vehicles is presented. Mostly, this kind of design or analysis includes complex workflow, huge amounts of information processing, and problem solving. Macro programs of I-DEAS, APDL of ANSYS, and in-house fatigue code are utilized for parametric geometry representation, automatic mesh generation, static stress analysis, fatigue durability analysis, post-processing, and data sorting. The engineering framework is implemented on the JADE. Since every task requires a fairly complex process and specialized knowledge, the multi-agent based framework is very useful to keep the independency among several disciplines or tasks and to use distributed hardware and software resources. All engineering programs are integrated by XML wrapper. Related database of the engineering framework and web based user interfaces are also developed. A parametric study is carried out to take into account the effect of geometrical change of transom support bracket on its cumulative fatigue damage. The developed engineering framework reduced remarkably the time and costs required in designing and solving engineering problems.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10b
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• pp.247-249
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• 2003

Currently there are a variety of different tools may be used to analyze, model, describe and document a business process. However, it is difficult to exchange the information of a business process created in different tools because of the distinct information formats used in different tools. The XML Process Definition Language (XPDL) of the Workflow Management Coalition (WfMC) forms a common interchange standard that enables products to continue to support arbitrary internal representations of process definitions with an import/export function to map to/from the standard at the product boundary. Generally a business process model can be represented by the UML activity diagram, but there is a difficult task to directly generate an XPDL document from a business process model represented by the standard activity diagram. In the paper we will propose an approach to generate an XPDL document from a business process model represented by the extended UML activity diagram.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.10a
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• pp.289-292
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• 2001

에이전트 위임모델 기반 워크플로우 시스템은 기존 클라이언트 서버기반 워크플로우 시스템과 이동에이전트 기반 워크플로우 시스템보다 워크플로우 수가 증가하고 워크플로우 구조가 복잡해짐에 따라 보다 좋은 성능 및 확장성을 제공한다. 이는 에이전트 위임모델이 워크플로우 엔진에서 발생하는 병목현상을 제거하여 작업수행자(Task Performer)라 명명된 호스트들로 워크플로우 엔진의 부하를 자연스럽게 분산시키기 때문이다. 에이전트 위임모텔은 워크플로우 엔진의 부하를 제거하지만, 작업수행자의 부하를 고려하지 않고 작업을 할당하기 때문에, 작업수행자에 병목현상을 발생시킬 수 있다. 이는 에이전트 위임모델의 목적인 워크플로우 시스템의 성능 및 확장성 향상을 저해하는 요인이다. 따라서, 워크플로우 시스템의 성능 및 확장성을 향상시키기 위해서는 작업수행자에 발생하는 병목현상을 제거해야 한다. 본 논문에서는 작업수행자의 병목현상을 제거하기 위해 응답리스트(Response List)를 제안하며 응답리스트 관리방법을 제시한다. 이러한 응답리스트가 에이전트 위임모델 기반 워크플로우 시스템의 성능 및 확장성 향상에 어떠한 영향을 미치는지 성능평가를 수행한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.04a
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• pp.160-163
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• 2015

워크플로우 매니지먼트시스템은 오늘날의 어플리케이션들의 처리를 위한 효율적인 워크플로우 설계와 수행을 가능하게 한다. 그러나 전체물리학, 생물학, 지질학과 같이 과학탐구에 목적을 둔 어플리케이션들의 경우 대용량의 데이터를 연산해야 하기 때문에 단일 컴퓨팅 자원으로는 단 시간내에 작업을 완료하기 어렵다. 클라우드 환경에서 워크플로우를 효율적으로 수행하기 위해서는 여러 자원을 효율적으로 활용하기 위한 분산 병렬처리가 필수적이다. 일반적으로 시스템의 마스터노드에서는 클러스터의 원격노드들에게 어플리케이션 수행을 위해 설계된 워크플로우에 맞게 작업들을 분배하게 되는데 이때 마스터노드와 원격노드의 큐에서의 대기시간과 원격노드에서 할당된 작업들을 위한 스케줄링 시간은 성능을 좋지 않게 만드는 원인이 된다. 따라서 본 논문은 클라우드 환경에서 원격노드에서 작업수행이전까지의 지연시간을 줄이기 위한 최적화 방법으로 컴퓨팅 자원 활용도를 고려한 작업들의 병합 기법을 적용해서 워크플로우의 처리 속도를 향상시킨다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.16 no.6
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• pp.1913-1934
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• 2022

The emergence of technologies like Big data analytics, Industrial Internet of Things, Internet of Things, and applicability of these technologies in various domains leads to increased demand in the underlying execution environment. The demand may be for compute, storage, and network resources. These demands cannot be effectively catered by the conventional cloud environment, which requires an integrated environment. The task of finding an appropriate service provider is tedious for a service consumer as the number of service providers drastically increases and the services provided are heterogeneous in the specification. A service broker is essential to find the service provider for varying service consumer requests. Also, the service broker should be smart enough to make the service providers best fit for consumer requests, ensuring that both service consumer and provider are mutually beneficial. A service broker in an integrated environment named Global Manager is proposed in the paper, which can find an appropriate service provider for every varying service consumer request. The proposed Global Manager is capable of identification of parameters for service negotiation with the service providers thereby making the providers the best fit to the maximum possible extent for every consumer request. The paper describes the architecture of the proposed Global Manager, workflow through the proposed algorithms followed by the pilot implementation with sample datasets retrieved from literature and synthetic data. The experimental results are presented with a few of the future work to be carried out to make the Manager more sustainable and serviceable.