• Title/Summary/Keyword: Engineering mathmatics

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Generation and Analysis of Pattern Classifier based on LFSRs (LFSR 기반의 패턴분류기의 생성 및 분석)

  • Kwon, Sook-Hee;Cho, Sung-Jin;Choi, Un-Sook;Kong, Gil-Tak;Kim, Doo-Han
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.7
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    • pp.1577-1584
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    • 2015
  • In this paper, we propose a method for generating pattern classifier based on LFSR. The proposed pattern classifier bosed on LFSR is easy to see non-reachable state, and we can obtain dependency vector by using the 0-basic path. Also, we propose a method for generating pattern classifiers based on LFSR which correspond to given dependency vector.

Computer Model for Fibrinogen Adsorption on Polyurethane Surface

  • Kim, Jong-Won;Shin, In-Sun;Ryu, Gyu-Ha;Lee, Kyu-Back;Han, Dong-Keun;Kim, Young-Ha;Min, Byoung-Goo
    • Journal of Biomedical Engineering Research
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    • v.15 no.1
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    • pp.51-56
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    • 1994
  • Protein adsorption on the polyurethane surface was modelled by a modified random sequential adsorption(RSA) process. In this model, polyurethane surface was modelled as a mixed domain of hydrophobic and hydrophilic parts which was implemented by a 2 dimensional $150{\times}150$ lattice in the computer. Protein adsorption was simulated using a small box which represents a particle of the protein, and polyurethane lattice by considering their hydrophobic interaction. In order to validate the model, we perfonned fibrinogen adsorption on polyurethane surface. Isotherms of the adsorbed protein were calculated and compared to the experimental data. The protein adsorption on the polyurethane surface could be well described using this computer model.

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A Study of NFT Platform To Improve Privacy and Performance (개인정보 보호 및 성능 개선을 위한 NFT 플랫폼 연구)

  • Kang, Myung-Joe;Kim, Mi-Hui
    • Proceedings of the Korea Information Processing Society Conference
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    • 2022.05a
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    • pp.248-251
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    • 2022
  • 최근 블록체인의 발전에 따라 디지털 자산을 위한 NFT 시장과 블록체인을 클라우드 서비스로 제공하는 BaaS 시장도 함께 발전하고 있다. 이에, 본 논문에서는 기존 NFT의 문제점인 느린 성능 및 비싼 수수료와 같은 사용성 문제와 개인정보 및 프라이버시 보호 문제의 보완을 위해 BaaS를 활용한 NFT 플랫폼을 제안한다. 또한, 시스템의 개요와 각 구성요소에 대한 자세한 내용을 제시하고 향후 연구에서의 시스템 구현을 위한 방향성을 제시한다.

Design of Personal Information Protection System in Blockchain using IAM Service (IAM 서비스를 이용한 블록체인에서의 개인정보보호 시스템 설계)

  • Myung-Joe Kang;Mi-Hui Kim
    • Proceedings of the Korea Information Processing Society Conference
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    • 2023.05a
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    • pp.250-252
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    • 2023
  • 본 논문에서는 인터넷으로 블록체인 플랫폼 및 서비스를 제공하는 BaaS 환경에서 IAM 서비스를 이용한 개인정보 보호 시스템을 설계했다. 서비스 사용자는 API를 통해 클라우드에 데이터를 요청하는데, 사용자와 클라우드 사이에 API 미들웨어를 두어 클라우드 데이터에 직접 접근하지 못하도록 한다. 또한, 미들웨어의 역할을 하는 서버는 IAM(Identity & Access Management) 서비스에서 생성한 역할 및 정책, 권한에 따라 허가된 데이터에만 접근하며 사용자의 데이터 요청 전/후로 인증 절차를 진행해 시스템의 기밀성 및 무결성을 만족할 수 있도록 한다.

Synthetic data generation technique using object bounding box and original image combination (객체 바운딩 박스와 원본 이미지 결합을 이용한 합성 데이터 생성 기법)

  • Ju-Hyeok Lee;Mi-Hui Kim
    • Proceedings of the Korea Information Processing Society Conference
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    • 2023.05a
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    • pp.476-478
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    • 2023
  • 딥러닝은 컴퓨터 비전의 상당한 발전을 기여했지만, 딥러닝 모델을 학습하려면 대규모 데이터 세트가 필요하다. 이를 해결하기 위해 데이터 증강 기술이 주목받고 있다. 본 논문에서는 객체 추출 바운딩 박스와 원본 이미지의 바운딩 박스를 결합하여 합성 데이터 생성기법을 제안한다. 원본 이미지와 동일한 범주의 데이터셋에서 참조 이미지의 객체를 추출한 다음 생성 모델을 사용하여 참조 이미지와 원본 이미지의 특징을 통합하여 새로운 합성 이미지를 만든다. 실험을 통해, 생성 기법을 통한 딥러닝 모델의 성능향상을 보여준다.

Jackknife Estimates for Parameter Changes in the Weibull Distribution

  • Jungsoo;Changsoo
    • Communications for Statistical Applications and Methods
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    • v.7 no.1
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    • pp.199-210
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    • 2000
  • We shall propose several estimators for the shape and scale parameters I the Weibull distribution based upon the complete or truncated samples when both parameters are functions of a known exposure level and study properties for proposed several estimators

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Buckling analysis of composite plates using differential quadrature method (DQM)

  • Darvizeh, M.;Darvizeh, A.;Sharma, C.B.
    • Steel and Composite Structures
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    • v.2 no.2
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    • pp.99-112
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    • 2002
  • The differential quadrature method (DQM) is a numerical technique of rather recent origin, which by its continually increasing applications in different problems of engineering, is a competing alternative to the conventional numerical techniques for the solution of initial and boundary value problems. The work of this paper concerns the application of the DQM in the area of the buckling of multi layered orthotropic composite plates with various boundary conditions the buckling of multi layered composite plates with constant and variable thickness under axial compressive static loading is considered. The effects of fiber orientation and boundary conditions on static behavior of composite plates are presented. The comparison of results from the present method and those obtained from NISA II software shows the accuracy and reliability of this method.

Using Double Photon Transmission of Quantum Cryptography (이중광자 전송을 통한 양자비밀통신)

  • Seol, Jung-Ja;Rim, Kwang-Cheol
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.17 no.8
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    • pp.1857-1864
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    • 2013
  • In this paper, we improve the quantum cryptography system using a dual photon transmission plaintext user password algorithmwas designed to implementthe exchange. Existing quantum cryptographic key transport protocols, algorithms, mainly as a quantum cryptography system using the paper, but it improved the way the dual photon transmission through the quantum algorithm re not getting transmitted plaintext.

Apply reinforcement learning of animal wearable robot design and development (강화학습 적용 동물 웨어러블 로봇 설계 및 개발)

  • Sang-soo Lee;Young-Chan Kim;In-A Gwan;Jun-Young Lee
    • Proceedings of the Korea Information Processing Society Conference
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    • 2023.11a
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    • pp.824-825
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    • 2023
  • 본 연구는 동물을 위한 웨어러블 로봇을 개발하고, 이를 상황에 따라 적절한 보행을 제어할 수 있도록 강화학습(DQN 알고리즘)을 적용한다. 다양한 센서를 동물에 부착하여 얻은 데이터를 DQN 알고리즘에 입력으로 사용한다. 이 알고리즘은 수집된 데이터를 분석하여 어떤 상황에서 어떤 종류의 보행이 가장 적절한지를 판단하고, 이를 로봇에 적용하여 동물의 보행을 자연스럽게 구현한다

Structural and electrical properties of (Ba0.7Sr0.3)TiO3 thin films for the application of electro-caloric devices

  • Kwon, Min-Su;Lee, Sung-Gap;Kim, Kyeong-Min;Choi, Seungkeun
    • Journal of Ceramic Processing Research
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    • v.20 no.4
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    • pp.395-400
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    • 2019
  • This study was conducted on the structural and electrical properties of (Ba0.7Sr0.3)TiO3 thin films prepared by the sol-gel and spin-coating methods in order to investigate their applicability to electrocaloric devices. All specimens showed a tetragonal crystal structure and lattice constants of a = 3.972 Å, c = 3.970 Å. The mean grain size of specimens sintered at 800 ℃ was about 30 nm, and the average thickness of 5 times coated specimens was 304~311 nm. In the specimen sintered at 750 ℃, The relative dielectric constant and loss of specimens measured at 20 ℃ were 230 and 0.130, respectively, while dependence of the dielectric constant on unit DC voltage was -8.163 %/V. The remanent polarization and coercive fields were 95.5 μC/㎠ and 161.3 kV/cm at 21 ℃, respectively. And, the highest electrocaloric property of 2.69 ℃ was observed when the electric field of 330 kV/cm was applied.