• Title/Summary/Keyword: Recovering

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A Study on the Husband and Wife Epic Test (부부서사진단도구를 위한 구비설화와 부부서사의 진단 요소)

In vitro cell recovery methoc as an altermative to human damaged skin recovery test

  • An, Su-Sun;Nam, Ki-Taek;Park, Jong-Ho;Koh, Jae-Sook
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.23 no.3
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    • pp.97-100
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    • 1997
  • These days, the raw materials that have the cell recovering effect are used commonly in cosmetics. In this study, six materials were rested for the characteristics of recovering effect both on vivo and in vitro. Tested raw materials were Soypol, 3-APPA, Apple extract, Polygonatum japonicum extract, Scutellarkd baicalensis extract, Aloe extract. Among these materials, Soypol and 3-APPA were synthesized and others were made by extraction at the Pacific R&D Center. Human forearm skin and cultured skin cell were damaged by sodium lauryl sulfare and then raw materials were applied for open treatment on SLS damaged human skin or cells. The recovering effects of raw materials in vivo were evaluated by measuring transepidermal water loss, skin hydration and erythema and in vitro effects of proliferationg cells were assessed by neutral red uptake assay. In the in vivo study, only the evaluation by TEWL showed correlation with the visual score. Our of six materials, 3-APPA had the most positive effect in both in vivo and in vitro studies and the correlation was r=0.8286 (p=0.042).

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Recovering RSA Private Key Bits from Erasures and Errors (삭제와 오류로부터 RSA 개인키를 복구하는 알고리즘)

  • Baek, Yoo-Jin
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.27 no.4
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    • pp.951-959
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    • 2017
  • Under the assumption that there is available some additional information other than plaintext-ciphertext pairs, the security of the RSA cryptosystem has been analyzed by the attack methods such as the side-channel attacks and the lattice-based attacks. Recently, based on the data retention property of the powered-off DRAMs, the so called cold boot attack was proposed in the literature, which is focusing on recovering the various cryptosystems' key from some auxiliary information. This paper is dealing with the problem of recovering the RSA private key with erasures and errors and proposes a new key recovery algorithm which is shown to have better performance than the previous one introduced by Kunihiro et al.

Recovering the Colors of Objects from Multiple Near-IR Images

  • Kim, Ari;Oh, In-Hoo;Kim, Hong-Suk;Park, Seung-Ok;Park, Youngsik
    • Journal of the Optical Society of Korea
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    • v.19 no.1
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    • pp.102-111
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    • 2015
  • This paper proposes an algorithm for recovering the colors of objects from multiple near-infrared (near-IR) images. The International Commission on Illumination (CIE) color coordinates of objects are recovered from a series of gray images captured under multiple spectral near-IR illuminations using polynomial regression. The feasibility of the proposed algorithm is tested experimentally by using 24 color patches of the Color Rendition Chart. The experimental apparatus is composed of a monochrome digital camera without an IR cut-off filter and a custom-designed LED illuminator emitting multiple spectral near-IR illuminations, with peak wavelengths near the red edge of the visible band, namely at 700, 740, 780, and 860 nm. The average color difference between the original and the recovered colors for all 24 patches was found to be 11.1. However, if some particular patches with high value are disregarded, the average color difference is reduced to 4.2, and this value is within the acceptability tolerance for complex image on the display.

A Study on the Simulator and Trouble Prediction Monitoring Methodology of the Automotive Air Conditioner (자동차 공조기의 시뮬레이터 및 고장예측 모니터링 기술에 관한 연구)

  • Son, Il-Moon;Kwak, Hyo-Yean
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.4
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    • pp.1568-1575
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    • 2013
  • There has been an increasing interest in the market of vehicle maintenance and repair equipments to decrease air pollution. However, most of the existing air conditioning system equipment in Korea have poor performance as well as non-protection against air pollution. The purpose of this paper is to develop the monitoring technology of recovering and recharging refrigerant for air conditioning system, and also to develop its related diagnostic system. This technology and system can supply the exact amount of refrigerant from the charger to the air conditioning system by precisely diagnosing and monitoring their statuses. This technology can also control recovering and recharging of refrigerant exactly by altering the recovering pressures of refrigerant according to circumstance temperatures.

Health Related Quality of Life Among Herniation of Nucleus Pulposus Patients Caused by Occupational Accidents (산업재해 추간판탈출증 환자의 삶의 질에 관한 연구)

  • Shin, Na Young;Lee, Se-Hoon
    • Korean Journal of Occupational Health Nursing
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    • v.16 no.2
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    • pp.168-176
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    • 2007
  • Purpose: This study was to investigate the factors influencing on the quality of life (QOL) among herniation of nucleus pulposus (HNP) patients caused by occupational accidents. Method: 203 patients of HNP were recruited. 106 patients were occupationally injured workers who benefited from workmen's compensation scheme (PWCS group), and 43 patients were non-occupationally injured workers benefiting from national health insurance (PNHI group). Questions of QOL items were used by Korean version of SBQOL (SmithKlein Beecham's Qality of Life). Result: The quality of life of PWCS group measured by SBQOL was significantly lower than that of PNHI group. In PWCS group, SBQOL was significantly lower in patients with 40s of their age, 5 years or longer of treatment duration, no expectation of return to work, no expectation of recovering subject's health, and with loss of employment than rest of the patients in each category. Expectations of recovering subject's health showed to be affect factors on QOL both the PWCS and PNHI groups. Conclusion: It suggested that betterment of expectation of recovering patient's health and an administrative system for returning to work of the occupationally injured HNP patients during treatment be necessary for improvement of their quality of life.

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On Recovering Erased RSA Private Key Bits

  • Baek, Yoo-Jin
    • International Journal of Internet, Broadcasting and Communication
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    • v.10 no.3
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    • pp.11-25
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    • 2018
  • While being believed that decrypting any RSA ciphertext is as hard as factorizing the RSA modulus, it was also shown that, if additional information is available, breaking the RSA cryptosystem may be much easier than factoring. For example, Coppersmith showed that, given the 1/2 fraction of the least or the most significant bits of one of two RSA primes, one can factorize the RSA modulus very efficiently, using the lattice-based technique. More recently, introducing the so called cold boot attack, Halderman et al. showed that one can recover cryptographic keys from a decayed DRAM image. And, following up this result, Heninger and Shacham presented a polynomial-time attack which, given 0.27-fraction of the RSA private key of the form (p, q, d, $d_p$, $d_q$), can recover the whole key, provided that the given bits are uniformly distributed. And, based on the work of Heninger and Shacham, this paper presents a different approach for recovering RSA private key bits from decayed key information, under the assumption that some random portion of the private key bits is known. More precisely, we present the algorithm of recovering RSA private key bits from erased key material and elaborate the formula of describing the number of partially-recovered RSA private key candidates in terms of the given erasure rate. Then, the result is justified by some extensive experiments.

The Implementation of Kernel Hardening Function by Recovering the Stack Frame of Malfunction Address on the Linux Operating System (리눅스 운영체제에서 주소값 오류시 스택 복구를 통한 커널 하드닝 기능 구현)

  • Jang, Seung-Ju
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.11 no.1
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    • pp.173-180
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    • 2007
  • This paper designs the kernel hardening function by recovering the kernel stack fame to reduce the system error or panic due to the kernel code error. The suggested kernel hardening function guarantees normal system operation by recovering the incorrect address of the kernel stack kernel. The suggesting kernel hardening mechanism is applied to the network module of Linux which is much using put. I experimented the kernel hardening function at the network module of the Linux by forcing panic code.

A Study on the Efficiency Improvement of a 3D Shape Measuring Apparatus With High Speed (고속 3차원 형상 측정 장치의 효율성 향상에 관한 연구)

  • 박승규;이일근;이영훈
    • Journal of the Korea Society of Computer and Information
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    • v.6 no.4
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    • pp.104-109
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    • 2001
  • In this paper, we designed a 3D shape measuring system with high speed and high measurement resolution using line-shaped sine stripes of a LCD projector We proposed an effective method to improve measurement efficiency for a 3D shape measuring system by finding the deficient shape information areas and recovering the shape information efficiently. We experimentally confirmed the improvement of measurement efficiency. Deficient shape information areas can be inevitably existed in a acquired image caused by the camera view angle and surface shapes of an object. The measurement efficiency is turned out to be improved by extracting these shadow areas and recovering the shape information efficiently using both a variable rated normalization and a variable sized phase recovering windows.

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