• Title/Summary/Keyword: 컴퓨터 재구성

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Design and Implementation of Security Reconfiguration for Effective Security Management of Mobile Communication Device (휴대용통신단말의 효과적인 보안관리를 위한 보안 재구성기법의 설계 및 구현)

  • An, Gae-Il;Kim, Ki-Young;Seo, Dong-Il
    • The KIPS Transactions:PartC
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    • v.16C no.6
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    • pp.691-698
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    • 2009
  • A mobile communication device is a small size of portable computer which provides communication service, such as smart phone and PDA. Currently, one of the biggest barriers in developing the mobile communication device is security issue. Even though there are excellent security functions which can remove the security issues, there is a problem that the mobile communication device can not be loaded with all the functions because it has low storage, poor computational power, and inconvenient user interface, compared to the desktop personal computer. This paper proposes a context-aware security reconfiguration scheme for effective security management of the mobile communication device. The scheme can provide the mobile communication device with the optimized security service which is most adapted to its current security context. Through the prototype implementation and the experiments of the proposed scheme, we have confirmed that the proposed scheme is excellent in terms of computing resource efficiency and usability, without degrading security level.

Panoramic Image Reconstruction using SURF Algorithm (SURF 알고리즘을 이용한 파노라마 영상 재구성)

  • Kim, Kwang-Baek
    • Journal of the Korea Society of Computer and Information
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    • v.18 no.4
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    • pp.13-18
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    • 2013
  • Panorama picturing is an elongated photographing technique that connects images with rotating and moving multiple images horizontally that are partly overlapped. However, for hand-operated photographs, it is difficult to adjust overlapped parts because of tilted angles. There has been a study comparing adjacent pictures using labeling technique but it was time-consuming and had angle dissonant cases in nature. In this paper, we propose a less time-consuming paranoiac scene reconstruction method. Our method is also based on labeling-and-comparing technique but uses only 1/3 of it. Then, if there exists angle dissonance, it tries to find characteristic points by SURF algorithm and adjusts them with homography. The efficacy of this method is experimentally verified by experiments using various images

Dynamic Personal Knowledge Network Design based on Correlated Connection Structure (결합 연결구조 기반의 동적 개인 지식네트워크 설계)

  • Shim, JeongYon
    • The Journal of Korean Association of Computer Education
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    • v.18 no.6
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    • pp.71-79
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    • 2015
  • In a new era of Cloud and Big data, how to search the useful data from dynamic huge data pool in a right time and right way is most important at the stage where the information is getting more important. Above all, in the era of s Big Data it is required to design the advanced efficient intelligent Knowledge system which can process the dynamic variable big data. Accordingly in this paper we propose Dynamic personal Knowledge Network as one of the advanced Intelligent system approach. Adopting the human brain function and its neuro dynamics, an Intelligent system which has a structural flexibility was designed. For Structure-Function association, a personal Knowledge Network is made to be structured and to have reorganizing function as connecting the common nodes. We also design this system to have a reasoning process in the extracted optimal paths from the Knowledge Network.

A management system for plural viewing coordinates of multiplanar reformation (의료영상 시스템의 다중 단면 재구성을 위한 좌표계 제어 시스템)

  • Kim, Jun-Ho;Kye, Hee-Won
    • Journal of the Korea Society of Computer and Information
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    • v.15 no.2
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    • pp.163-170
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    • 2010
  • Multi-planar reformatting(MPR) is a volume rendering technique which generates images of sectional planes users define, so that it is essential for medical imaging system. Due to the recent advances of medical imaging system, users require to place plural planes on a single dataset and to enable an individual and easy control for each plane. In this paper, we enumerate various user operations for recent MPR and analyze user requirements to update the plane equation. For the effective control of coordinate system, each plane is considered in a separated coordinate system and all informations which form a coordinate system are grouped into two components: the individual components and the common components. The proposed system is implemented on a graphics hardware, so that it smoothly performs MPR including recent requirements.

Optimal Production-Inventory Control Policy with an e-MarketPlace as an Emergent Replenishment/Disposal Mode in Reconfigurable Manufacturing System (재구성가능생산시스템 환경에서 긴급 재고 보충 및 처리 대안으로써 e-MarketPlace를 고려한 최적 생산-재고관리정책)

  • Jang, Il-Hwan;Lee, Chul-Ung
    • Journal of the Korea Society of Computer and Information
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    • v.12 no.5
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    • pp.273-284
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    • 2007
  • This paper studies a periodic review inventory model with an e-MarketPlace transaction in reconfigurable manufacturing system(RMS). A decision maker can expand/reduce production capacity/quantities and/or replenish/dispose inventories from/to e-MarketPlace urgently to satisfy the stochastic demands. If inventories are replenished or disposed through e-MarketPlace, this leadtime is shorter than the production leadtime, but unit purchasing or selling cost is more expensive than that of expanding capacity or reducing production quantities respectively. Henceforth, trade-off on these alternatives is considered. In addition to this, in order to consider the economy of scale, our model includes the fixed cost for purchasing from e-MarketPlace and capacity expansion. We use dynamic programming and K convexity methods to characterize the nature of the optimal policy. Finally, We present the optimal inventory control policy which is composed by the combinations of a base stock and (s,S) type policy.

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The Effectiveness of the Figure Learning using 3D Graphics Software (3D 그래픽 소프트웨어를 활용한 도형 학습 효과)

  • Shin, Soo-Bum;Kim, Ju-Il
    • Journal of the Korea Society of Computer and Information
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    • v.18 no.1
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    • pp.185-192
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    • 2013
  • The development of hardware, popularization of 3D graphics software could get to easily use 3d graphics tool in the school. And learning difficulties of a shape section increased through more being enforced a shape section of an elementary school. Thus we try to improve learning effectiveness in a shape section using Sketech Up software. To do this, we analyzed existing studies, classified 3D graphics software, provided the selection criteria of vector graphics software. And we explained how to select 3D graphics software. We selected and reorganized the shape contents to use Sketch Up, which make and rotate 3D figures, understand aspects of a shape. And we inserted the content about piling 3D figures in the beginning state of the curriculum. we composed 10 periods and practiced our reorganized curriculum to the teaching and learning using Sketch Up. And we conducted before & after survey to check out t-verified. And we acquired meaningful results statistically. Thus applying Sketch Up to the shape learning can be analyzed effectively.

An EIBS Algorithm for Wireless Sensor Network with Life Time Prolongation (수명 연장 기능의 무선 센서 네트워크용 EIBS 알고리즘)

  • Bae, Shi-Kyu
    • Journal of the Korea Society of Computer and Information
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    • v.19 no.9
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    • pp.65-73
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    • 2014
  • Since Time synchronization is also critical in Wireless Sensor Networks (WSN) like other networks, a time synchronization protocol for WSN called IBS(Indirect-Broadcast Synchronization) has been already proposed in 2012. As IBS operates in cluster tree topology, network lifetime may be mainly shortened by cluster head node[s], which usually consumes more power than cluster member (i.e. non-cluster head) nodes. In this paper, I propose enhanced version of IBS (called EIBS) which saves overall energy and prolongs network lifetime by re-constructing partial cluster tree locally. Compared with other tree construction approaches, this tree reconstruction algorithm is not only simpler, but also more efficient in the light of overall power consumption and network lifetime.

Karyotype Classification of The Chromosome Image using Hierarchical Neural Network (계층형 신경회로망을 이용한 염색체 영상의 핵형 분류)

  • 장용훈
    • Journal of the Korea Computer Industry Society
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    • v.2 no.8
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    • pp.1045-1054
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    • 2001
  • To improve classification accuracy in this paper, we proposed an algorithm for the chromosome image reconstruction in the image preprocessing part and also proposed the pattern classification method using the hierarchical multilayer neural network(HMNN) to classify the chromosome karyotype. It reconstructed chromosome images for twenty normal human chromosome by the image reconstruction algorithm. The four morphological and ten density feature parameters were extracted from the 920 reconstructed chromosome images. The each combined feature parameters of ten human chromosome images were used to learn HMNN and the rest of them were used to classify the chromosome images. The experimental results in this paper were composed to optimized HMNN and also obtained about 98.26% to recognition ratio.

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Hypertext Networks Restructure using User Browsing Behaviors on WWW (웹 상에서 사용자 브라우징 행위를 이용한 하이퍼텍스트 네트워크 재구성)

  • 백영태;이세훈
    • Journal of the Korea Computer Industry Society
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    • v.2 no.11
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    • pp.1365-1372
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    • 2001
  • We have suggested three learning rules and implemented an experimental system that automatically restructures hypertext networks according to their user browsing behavior. The system applies link weights to the hypertext networks and updates these weights according to the learning rules. The learning rules are based on how often a particular hyperlink is being traversed and operate on strictly local information of link traversals. Changes in network structure are fed back to users by dynamic link ordering according to descending link weight. This approach is used collaborative filtering and navigation support techniques. The system has been investigation to be able to structure random hypertext networks into valid representations of their user browsing preferences in experiments.

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Virtual DressUp system by using image deformation method (이미지 변형 기법을 이용한 가상 드레스업 시스템)

  • Kim, Na-Ri;Yoon, Jong-Chul;Lee, In-Kwon
    • Journal of the Korea Computer Graphics Society
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    • v.15 no.2
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    • pp.1-8
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    • 2009
  • This paper introduces a virtual dress up system, according to user's input model and garment image. At first step, we deform the garment image by using skeleton structures and ARAP method. Next step, sampling the boundary points and find their matching vertices which are used for optimizing the boundary fitting. In 2D rendering of the dress up, they have some unrealistic results, so we reconstruct the garment mesh to the 3D mesh. Rendering from the reconstructed 3D mesh, we can get the final dress up result. We present that our system produce a visually plausible and well-fitted virtual dress up results.

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