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A Design and Analysis of the Block Cipher Circle-g Using the Modified Feistel Structure (변형된 Feistel 구조를 이용한 Circle-g의 설계와 분석)

  • 임웅택;전문석
    • Journal of the Korea Computer Industry Society
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    • v.5 no.3
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    • pp.405-414
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    • 2004
  • In this paper, we designed a 128-bits block cipher, Circle-g, which has 18-rounds modified Feistel structure and analyzed its secureness by the differential cryptanalysis and linear cryptanalysis. We could have full diffusion effect from the two rounds of the Circle-g. Because of the strong diffusion effect of the F-function of the algorithm, we could get a 9-rounds DC characteristic with probability 2^{-144} and a 12-rounds LC characteristic with probability 2^{-144}. For the Circle-g with 128-bit key, there is no shortcut attack, which is more efficient than the exhaustive key search, for more than 12 rounds of the algorithm.

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Development of Contents to Improve the Web Accessibility for People with Visual Impairments (시각장애인의 웹 접근성 향상을 위한 콘텐츠개발)

  • Son, Seung-Hun;Park, Doo-Soon;Hong, Ming
    • The Journal of Korean Association of Computer Education
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    • v.11 no.2
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    • pp.45-53
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    • 2008
  • Since people with visual impairments are mostly hard to access the Internet they have been neglected from the information-oriented society. Therefore, the contents which consider the web accessibility to readily access to the web by people with visual impairments are an essential component. In this paper, we developed the contents to improve the web accessibility for people with visual impairments. To provide easy access to the web by people with visual impairments, we analyzed the existing web sites for blind people and considered a concise design, and hierarchical structure. Using the PHP, CSS, and Javascript, the necessary functions for the visually handicapped such as focusing, shortcut key, and text equivalent are implemented. The results which are tested by blind users prove the efficiency of the proposed contents.

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Design and Simulation of Interconnection Network Based on Topological Combination (위상 결합을 기반으로 한 연결 망 설계 및 시뮬레이션)

  • 장창수;최창훈
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.6B
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    • pp.563-574
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    • 2004
  • In this paper, we propose a new class of MIN(Multistage Interconnection Network) called Combine MIN which combines static network topology and apimic network topology. Combine U provides multiple paths at a hardware cost lower than that of MIN with unique path property. Combine MIN can be constructed suitable for localized communication by providing the shortcut path and multiple paths inside the processor-memory cluster which has frequent data communications. According to the results of analysis and simulation for performance evaluation, Combine MIN shows higher performance than MINs of the same network size in the highly localized communication Therefore, Combine MIN can be used as an attractive interconnection network for parallel applications with a localized communication pattern in shared-memory multiprocessor systems.

A study on the digital media adaptation figures Creation (Digital media의 순응형 인물창조 연구)

  • Kang, Hong Gue
    • Journal of Digital Convergence
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    • v.10 no.11
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    • pp.595-601
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    • 2012
  • Narrative art is primarily narrative fiction realistic possibility for human figures into the contents of the work to build the core structure of the narrative, and the most important factor. Constitute the narrative structure of the story, while leading configuration is the subject of the act. Portrait of the artist's work presented in this perspective is the default attitude that gives the order to the drama itself, because it is the drama of aesthetic structure will eventually work through the people in the know. Mixture of aesthetic pleasure and aesthetic understanding of the regular drama is when you think that consciousness is through characters in his works is a shortcut to identify the writers think about the narrative structure.

A Study on the Adjustment between a Corporate Account and a Taxation Account (기업회계와 세무회계의 차이 조정에 관한 연구 -세무조정과 수정회계를 중심으로-)

  • Lee Kyong-Oh
    • Management & Information Systems Review
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    • v.14
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    • pp.101-115
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    • 2004
  • As a corporate and a taxation account have relationships each other, one cannot be ignored by the other from concrete and excepted points of view. In reality, as they are mixed and the taxation account has been regarded as absolute, we cannot deny that the role of a pure corporate account is intruded by taxation account. Therefore, it is important that both should be adjusted in order to develop their own roles between a corporate account and a taxation account. In order to develop the both accounts soundly, we should solve the problems as follows. First, we should discriminate closing adjustment affairs from reporting adjustment ones, In the process of adjusting for taxation report. Second, the manager and the accounter need to comprehend on the origin and reality of a corporate and a taxation account and improve their capacity of accounting. Finally, as the goals which both aspects seek for are different, it is difficult to meet each other. But it will be a shortcut for enhancing the capacity of the corporate management, and developing the accounting systems of Korea, to compensate the differences each other. In conclusion, this writer suggest that the corporate accounts should be treated according to the corporate accounting principle, and taxation law has to be reformed so that taxable income may be counted based on the former assertion.

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Design and Implementation of MPOA using SDL (SDL을 이용한 MPOA 설계 및 구현)

  • Lim, Ji-Young;Kim, Hee-Jung;Lim, Soo-Jung;Chae, Ki-Joon;Lee, Mee-Jung;Choi, Kil-Young;Kang, Hun
    • Journal of KIISE:Computing Practices and Letters
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    • v.6 no.6
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    • pp.643-656
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    • 2000
  • MPOA proposed and standardized by the ATM Forum is a protocol tllat provides effective bridging and routing for ATM networks in a diverse network environment. Its plimary goal is to transfer unicast data effectively among the subnets. In this paper, MPOA components are implemented using the SDL(Specification and Description Language) which the ITU has standardized for the development of communication systems. In addition, MPOA procedures for various operations such as address translation for packets from upper layers, Ingress/Egress cache management and shortcut configuration, are examined with tlle help of the SDT(SDL Design Too]) simulator.

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In vitro and in vivo Application of PLGA Nanofiber for Artificial Blood Vessel

  • Kim, Mi-Jin;Kim, Ji-Heung;Yi, Gi-Jong;Lim, Sang-Hyun;Hong, You-Sun;Chung, Dong-June
    • Macromolecular Research
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    • v.16 no.4
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    • pp.345-352
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    • 2008
  • Poly(lactic-co-glycolic acid) (PLGA) tubes (5 mm in diameter) were fabricated using an electro spinning method and used as a scaffold for artificial blood vessels through the hybridization of smooth muscle cells (SMCs) and endothelial cells (ECs) differentiated from canine bone marrow under previously reported conditions. The potential clinical applications of these artificial blood vessels were investigated using a canine model. From the results, the tubular-type PLGA scaffolds for artificial blood vessels showed good mechanical strength, and the dual-layered blood vessels showed acceptable hybridization behavior with ECs and SMCs. The artificial blood vessels were implanted and substituted for an artery in an adult dog over a 3-week period. The hybridized blood vessels showed neointimal formation with good patency. However, the control vessel (unhybridized vessel) was occluded during the early stages of implantation. These results suggest a shortcut for the development of small diameter, tubular-type, nanofiber blood vessels using a biodegradable material (PLGA).

A Study on the DAISY Service Interface for the Print-Disabled (독서장애인을 위한 DAISY 서비스 인터페이스 구성에 관한 연구)

  • Bae, Kyung-Jae
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.22 no.3
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    • pp.173-188
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    • 2011
  • This research intended to identify empirical recommendations for designing the DAISY service interface and used a case-based method. The case of this research was LG Digital Talking Book Library(http://voice.lg.or.kr) of LG Sangnam Library. A group of experts evaluated the current DAISY interface serviced by the web. After evaluation, major recommendations were suggested and these recommendations were used to develop the new DAISY Interface. Major recommendations were consideration of the reading flow of the screen-reader program, prevention of perception as an error about the time delay, development of web-based software, support for convenient functions and prevention of shortcut key overlap and so on.

Percutaneous osteoplasty for painful bony lesions: a technical survey

  • Kim, Won-Sung;Kim, Kyung-Hoon
    • The Korean Journal of Pain
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    • v.34 no.4
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    • pp.375-393
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    • 2021
  • Percutaneous osteoplasty (POP) is defined as the injection of bone cement into various painful bony lesions, refractory to conventional therapy, as an extended technique of percutaneous vertebroplasty (PVP). POP can be applied to benign osteochondral lesions and malignant metastatic lesions throughout the whole skeleton, whereas PVP is restricted to the vertebral body. Common spinal metastases occur in the thoracic (70%), lumbosacral (20%), and cervical (10%) vertebrae, in order of frequency. Extraspinal metastases into the ribs, scapulae, sternum, and humeral head commonly originate from lung and breast cancers; extraspinal metastases into the pelvis and femoral head come from prostate, urinary bladder, colon, and uterine cervical cancers. Pain is aggravated in the dependent (or weight bearing) position, or during movement (or respiration). The tenderness and imaging diagnosis should match. The supposed mechanism of pain relief in POP is the augmentation of damaged bones, thermal and chemical ablation of the nociceptive nerves, and local inhibition of tumor invasion. Adjacent (facet) joint injections may be needed prior to POP (PVP). The length and thickness of the applied needle should be chosen according to the targeted bone. Bone cement is also selected by its osteoconduction, osteoinduction, and osteogenesis. Needle route should be chosen as a shortcut to reach the target bony lesions, without damage to the nerves and vessels. POP is a promising minimally invasive procedure for immediate pain relief. This review provides a technical survey for POPs in painful bony lesions.

Finite Element Analysis and Its Verification of Springback in L-bending to Evaluate the Effect of Process Design Parameters (L-벤딩에서 공정 설계변수가 스프링백에 미치는 영향의 평가를 위한 유한요소해석 및 검증)

  • Cho, M.J.;Kim, S.J.;Joun, M.S.
    • Transactions of Materials Processing
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    • v.30 no.6
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    • pp.275-283
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    • 2021
  • A parametric study was conducted on the effects of five fundamental design parameters on springback, including die clearance, step height, step width, punch radius, and taper relief in an L-bending process, controlled by the compression force. The experiment was also conducted to verify the usefulness of the parametric study procedure for process design, as well as the finite element predictions. The elastoplastic finite element method was utilized. The L-bending process of the york product, which is a key part of the breaker mechanism, was employed. The deformation of the material was assumed to be due to plane strain. Five samples of each design parameter were selected based on experiences in terms of process design. The finite element predictions were analyzed in detail to show a shortcut towards the process design improvement which can replace the traditional process design procedure relying on trial-and-errors. The improved process design was verified to meet all the requirements and the predictions and experiments were in good agreement.