• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 하계종합학술대회논문집
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• pp.773-776
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• 1998

In this paper, we propose an efficient multi-view images coding algorithm which finds the optimal texture from the restricted number of multi-view images. The X-Y plane of the normalized object space is divided into triangular patches. The depth value of the node is determined by applying the block based disparity compensation method and then the texture of the each patch is extracted by applying the affine transformation patch is extracted by applying the affine transformation based disparity compensation method to the multi-view images. We restricted the number of images contributed to determining the texture comapred to traditional methods which use all the multi-view images in the texture extraction. Experimental results show that the SNR of images encoded by the proposed algorithm is better than that of imaes encoded by the traditional method by the amount about 0.2dB for the test sets of multi-view images called dragon, kid, city and santa. The recovered images from the encoded data by the proposed method show the better visual images than the recovered images from the encoded data by the traditional methods.

• Parasites, Hosts and Diseases
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• 제35권3호
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• pp.215-218
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• 1997

심한 항문 주위 가려움증이 있는 15개월 된 소아(인천 거주)로부터 과수태 요충 1마리를 항문 주위 도말법으로 회수하였다. 충체는 길이가 7.8 mm이고 폭이 0.5 mm였으며. 두익(73보) 자궁내 충란. 뽀족한 로리 등 요충 자충의 특이한 형태학적인 특징을 가지고 있었다. 그러나 이 충체는 과수태한 충체로서 자궁이 충체 전단에서부터 후단까지 길게 확장되어 있었으며. 충체 길이 의 약 99%까지 수많은 충란으로 가득 차 있고 다른 기관은 관찰하기 어려운 특이한 충체이었다.

• 한국군사과학기술학회지
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• 제13권6호
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• pp.1147-1152
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• 2010

This paper reports a safe and environmentally-benign demilitarization method for the K305 35mm CS gas grenades launcher set(also known as E-8 launcher). The launcher system was disposed by a two-step process; complete recovery of the explosive cords and the gas grenades from the launcher followed by incineration of the recovered items in the APE-1236 Flashing Furnace. All of the 64 grenades within the 16 tubes of the E-8 launcher were safely recovered and incinerated. In this study, 32 sets of the launcher were used to make a standard operating procedure for the safe demilitarization of the launcher system and the 35mm CS cartridges were all safely destroyed in the experimental burning tests meeting the related environmental regulations.

• 로봇학회논문지
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• 제16권3호
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• pp.245-249
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• 2021

In this paper, we present novel simulation contents for drone racing and autonomous flight of drone. With Depth camera and SLAM, we conducted mapping 3 dimensional environment through RTAB-map. The 3 dimensional map is represented by point cloud data. After that we recovered this data in Unreal Engine. This recovered raw data reflects real data that includes noise and outlier. Also we built drone racing contents like gate and obstacles for evaluating drone flight in Unreal Engine. Then we implemented both HITL and SITL by using AirSim which offers flight controller and ROS api. Finally we show autonomous flight of drone with ROS and AirSim. Drone can fly in real place and sensor property so drone experiences real flight even in the simulation world. Our simulation framework increases practicality than other common simulation that ignore real environment and sensor.

• Structural Engineering and Mechanics
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• 제83권2호
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• pp.273-282
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• 2022

In this paper, we propose a new concept for error estimation in finite element solutions, which we call mode-based error estimation. The proposed error estimation predicts a posteriori error calculated by the difference between the direct finite element (FE) approximation and the recovered FE approximation. The mode-based FE formulation for the recently developed self-updated finite element is employed to calculate the recovered solution. The formulation is constructed by searching for optimal bending directions for each element, and deep learning is adopted to help find the optimal bending directions. Through various numerical examples using four-node quadrilateral finite elements, we demonstrate the improved predictive capability of the proposed error estimator compared with other competitive methods.

• 한국정보통신학회논문지
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• 제9권6호
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• pp.1333-1340
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• 2005

본 논문은 리눅스 커널 운영체제에서 커널 개발자의 실수나 의도하지 않은 오류 및 시스템 오류로 인하여 발생되는 시스템 정지 현상을 줄이기 위한 커널 하드닝 기능을 설계한다. 본 논문에서 제안하는 커널 하드닝 기능은 문제가 발생한 커널 부분을 수행 중인 프로세스에 대한 동작을 정지시키는 기능과 오류가 발생한 코드에 대한 변수 값이나 주소 값이 가진 특정한 값을 복구시키는 기능을 가진다. 커널 하드닝 기능에서 문제가 있는 모든 프로세스를 무조건 복구하는 것이 아니라 복구 가능성을 판별하여, 복구 가능한 프로세스에 대해서만 복구 될 수 있도록 한다. 또한 오류가 발생한 커널 코드에 대해서 복구 가능한 경우에는ASSERT() 함수에서 복구가 가능하도록 설계하였다.

• 보존과학회지
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• 제34권6호
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• pp.549-556
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• 2018

In November 2011, various artifacts were excavated from the No. 8 stone-lined tomb in Suchon-ri, Gongju by the Chungnam Institute of History and Culture. These included artifacts with lacquered mainframe and silvery metal ornament. These were recovered together with soil and underwent conservation treatment. In this paper, we discuss the scientific analysis and conservation treatment of the lacquered artifacts excavated from the Suchon-ri site. Among our findings is that the artifacts have three layers of lacquer coating and the metal parts are primarily composed of Ag. As the artifacts were recovered with soil from the site, the soil was removed from underneath and inside the artifacts. The inside of the lacquerware was reinforced with rayon paper using 3% funori, and the metal was treated with acrylic resin after removing the acrylic resin previously used to recover the artifact, followed by cleaning. The metal was also internally reinforced with gauze. Finally, the interior reinforcement was made using PVA and resin in pulp and attached with funori to preserve the shape of the lacquerware, and the exposed rayon was finished with acrylic paint. The main advantages of this study are its review of conservation treatment strategies for lacquer artifacts whose numbers have recently increased, and the application of new conservation treatment methods.

• 정보보호학회논문지
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• 제9권4호
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• pp.49-60
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• 1999

본 논문은 악성 프로그램 중 피해가 큰 컴퓨터 바이러스에 대하여 정의 및 부작용 그리고 형태 변화에 대하여 고찰 한후 최근 아시아 지역에서 많은 피해를 준 CIH 바이러스에 대한 특 징 메모리와 파일 치료방법을 기술하고 피해 복구방법을 원도95/98 운영체제하에서 FAT32 파일 시스템 구조를 가지 는 하드디스크를 복구하는 방법을 제안하고 실제로 상용의 백신 프로그램을 이용한 복구 사 례를 제시한 다. In this paper we introduce the definition and historical overviews of computer virus program and review their side-effect and ways of infections. We describe the feature of CIH virus which damaged lots of PC systems in Asian countries recently and propose new methods how to rescue against destruction under the operating system of the Microsoft's Windows 95/98. Our experiment results can fix hard disk having FAT32 file system structure and show some popular program cases of having recovered by commercial vaccine program.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.1717-1720
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• 2004

In this paper we propose a new scheme of watermarking using the discrete wavelet transform, the discrete cosine transform, and the performance evaluation function, which does not deteriorate image quality and have robustness to attacks such as compression and scaling. moreover even if a detected watermark, which is a bit sequence in this paper, has some error bits, it can be correctly recovered using correlation-based determination scheme.

• 자원리싸이클링
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• 제10권5호
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• pp.3-7
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• 2001

Indium frequently associated with the semiconductor industry is becoming an important metal element widely used in industry. In this paper, its properties especially in relation to its recovery from scrap are reviewed and discussed. Also presented in this paper is how best indium can be recovered by the hydrometallurgical means.