• Transactions of Materials Processing
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• v.13 no.2
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• pp.168-173
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• 2004

Microforming can be a good application for bulk metallic glasses. It is important to simulate the deformation behaviour of the bulk metallic glasses in a supercooled liquid region for manufacturing micromachine parts. For these purposes, a correct constitutive model which can reproduce viscosity results is essential for good predicting capability. In this paper, we studied deformation behaviour of the bulk metallic glasses using the finite element method in conjunction with the fictive stress constitutive model which can describe non-Newtonian as well as Newtonian behaviour. A combination of kinetic equation which describes the mechanical response of the bulk metallic glasses at a given temperature and evolution equations fur internal variables provide the constitutive equation of the fictive stress model. The internal variables are associated with fictive stress and relation time. The model has a modular structure and can be adjusted to describe a particular type of microforming process. Implementation of the model into the MARC software has shown its versatility and good predictive capability.

• Parasites, Hosts and Diseases
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• v.37 no.4
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• pp.197-213
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• 1999

Phylogeny is the evolutionary history of a group or the lineage of organisms and is reconstructed based on morphological, molecular and other characteristics. The genealogical relationship of a group of taxa is often expressed as a phylogenetic tree. The difficulty in categorizing the phylogeny is mainly due to the existence of frequent homoplasies that deceive observers. At the present time, cladistic analysis is believed to be one of the most effective methods of reconstructing a phylogenetic tree. Excellent computer program software for phylogenetic analysis is available. As an example, cladistic analysis was applied for nematode genera of the family Acuariidae, and the phylogenetic tree formed was compared with the system used currently. Nematodes in the genera Nippostrongylus and Heligmonoides were also analyzed, and the validity of the reconstructed phylogenetic trees was observed from a zoogeographical point of view. Some of the theories of parasite evolution were briefly reviewed as well. Coevolution of parasites and humans was discussed with special reference to the evolutionary relationship between Enterobius and primates.

• Journal of KIISE:Software and Applications
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• v.26 no.4
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• pp.453-461
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• 1999

최근 들어 생물학적 두뇌에 대한 관심이 높아지고 있으며, 그에 따라 인공두뇌의 개발이나 두뇌의 기능을 밝히고자 하는 시도가 활발히 이루어지고 있다. 특히 셀룰라 오토마타는 간단한 규칙들의 조합으로 복잡한 현상을 표현하는 모델로 복잡한 두뇌를 표현하기에 적합한 모델로 복잡한 두뇌를 표현하기에 적합한 모델일 기대된다. 셀룰라 오토마타 상에서 특정한 기능을 갖도록 신경망 모듈들을 진화시킨 후, 이들을 결합하여 인공두뇌를 개발하고자 하는 시도가 있다. 본 논문에서는 이러한 접근방식의 유용성을 보여주기 위하여 적당한 크기의 셀룰라 오토마타 공간에서 신경망을 만들어내어 이동 로봇의 제어기를 진화방법으로 구성하고자한다. 실험결과 로봇이 벽과 충돌하지 않고 잘 움직일 수 있도록 진화된 제어기를 얻을 수 있었다. 또한 다각적인 분석과정을 통해 진화된 제어기의 구조와 그 작동과정으 밝혀내고자 하였다.

• 연구논문집
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• s.30
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• pp.169-176
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• 2000

The Evolution of Workflow Managment consists of rhe automation of business procedures or "workflows" during which documents, information or tasks are passed from one participant to another in a way that is governed by rules or procedures. Workflow technologies have evolved from image management system, document management system, relational or object database systems, and electronic mail system. Workflow Management system has the benefits to improve better efficiency, process control,flexibility, business process. Automation of many business processes results in the elimination standdardizing working methods. Consistency in the processes leads to greater predictability in levels of response to customers and software control over processes enables their re-design in line with changing business needs, In this present study, we implement Electronic Approval System which is a kind of Workflow Management system using static and dynamic flow control information on the web environment.

• Proceedings of the KIEE Conference
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• 2009.04b
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• pp.88-90
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• 2009

Extremely-Low-Frequency(ELF) magnetic fields are generated around power cables and bus bars in power systems. Such the stray fields may cause disturbances to nearby electronic apparatus and affect even human health. In order to seeking out a proper way to reducing the fields, the first thing to do is to accurately predict field distribution around analysis models of interest. Then, optimization techniques should be applied for finding a more improved design than the initial one. To achieve this goal, commercial electromagnetic software, MagNet, is combined with evolution strategy algorithm. For verification of the proposed method, three-phase power line cables and busbar systems have been tested.

• Imaging Science in Dentistry
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• v.49 no.3
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• pp.179-190
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• 2019

Panoramic radiographs and computed tomography (CT) play a paramount role in the accurate diagnosis, treatment planning, and prognostic evaluation of various complex dental pathologies. The advent of cone-beam computed tomography (CBCT) has revolutionized the practice of dentistry, and this technique is now considered the gold standard for imaging the oral and maxillofacial area due to its numerous advantages, including reductions in exposure time, radiation dose, and cost in comparison to other imaging modalities. This review highlights the broad use of CBCT in the dentomaxillofacial region, and also focuses on future software advancements that can further optimize CBCT imaging.

• Advances in materials Research
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• v.8 no.1
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• pp.1-10
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• 2019

Roll bonding (RB) process of bi-metal laminates as a new noble method of bonding has been widely used in the production of bimetal laminates. In the present study, asymmetric roll bonding process as a new noble method has been presented to produce Al/Cu bimetallic laminates with the thickness reduction ratios 10%, 20% and 30% together with mismatch rolling diameter ($\frac{R_2}{R_1}$) ratio 1:1, 1:1.1 and 1:1.2. ABAQUS as a finite element simulation software was used to model the deformation of samples. The main attention in this study focuses on the bonding properties of Al/Cu samples. The effect of the $\frac{R_2}{R_1}$ ratios was investigated to improve the bond strength. During the simulation, for samples produced with $\frac{R_2}{R_1}=1:1.2$, the vertical plastic strain of samples was reach the maximum value with a high quality bond. Moreover, the peeling surface of samples after the peeling test was investigated by the scanning electron microscopy (SEM).

• Journal of Multimedia Information System
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• v.8 no.4
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• pp.285-294
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• 2021

The development process of domestic CG (Computer Graphics) needs to be studied by classifying the technical part and the design part. This paper analyzes how early domestic broadcast equipment evolved and focused on what went through the development process. Domestic broadcasting companies have introduced and used overseas equipment and have begun to develop their own technology. The development process of the early domestic production technology of broadcasting stations was classified into Character Generator, On-line Real-Time Graphic and Sport Coder. It was found that the orientation of broadcasting technology was conclusively focused on visualization, with socio-cultural factors acting along with the evolution of hardware and software. This research is meaningful in reorganizing the history of the development process of domestic CG technology in the early days through previous research (primary verification), newspaper articles and news coverage (secondary verification). This paper looks at what is missing by regaining the past of CG, and argues that with the advent of new technologies today, we must develop through appropriate division of roles and collaboration between engineers and designers.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.867-868
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• 2009

아키텍쳐를 기반으로 디자인 된 소프트웨어는 컴포넌트간의 낮은 결합력 때문에 재사용이나 부분적인 수정이 쉽다. 일반적으로 아키텍쳐는 디자인 단계에서 구성되며 아키텍쳐 디자인을 바탕으로 컴퍼넌트들을 구현한다. 그러나 프로그래밍 언어의 컴퍼넌트간 인터페이스는 아키텍쳐의 커넥터와 다르기 때문에 구현된 코드는 아키텍쳐 디자인을 있는 그대로 반영하지 못 한다. 결과적으로 차후 프로그램 코드의 수정이나 재사용이 아키텍쳐 디자인의 변경보다 복잡해진다. 본 논문에서는 아키텍쳐의 커넥터를 클래스를 통해 명확히 구현함으로써 아키텍쳐 디자인을 그대로 유지하는 코드 작성법을 제안한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.36-37
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• 2022

선박의 안천한 항해를 돕기 위하여 해상에 항로표지를 설치하여 운영하고 있다. 해상 ICT(Information and Communications Technology)의 발달로 AtoN AIS(Automatic Identification System) 및 CDMA(Code Division Multiple Access), LTE(Long Term Evolution) 등 다중통신망을 이용하여 항로표지의 상태를 감시하고 제어가 가능해짐에 따라 해양수산부에서는 항로표지 관리운영시스템을 운영하고 있다. e-Navigation 및 자율운항선박 분야 등에 항로표지 스마트화를 위해 정확한 항로표지 정보가 요구된다. 본 논문에서는 정확한 항로표지 정보 제공을 위해 관리운영시스템 표준소프트웨어 문제점을 분석하고 개선방안에 대해서 소개한다.