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김흥기,송영렬 한국세무회계학회 2004 세무회계연구 Vol.14 No.-
본 연구의 목적은 투자자에게 공시된 연구개발비 지출액 관련 회계정보가 기업성과에 미치는 영향을 알아보는 것이다. 이와 같은 연구의 목적을 수행하기 위해 우리나라 상장기업들 중 화학, 전기전자, 기계, 그리고 의약품업종에 속하는 78개 기업을 표본으로 선정하여 가설검증을 실시하였으며, 그 연구결과는 다음과 같다. 첫째, 당기의 연구개발비는 기업의 성과와 특별한 관계를 보여주지 못하였다. 하지만, 과거의 연구개발비 수준이 높을수록 주식투자수익률과 회계이익인 총자산순이익률이 높아지는 것으로 측정되었다. 따라서 당기의 연구개발비는 기업성과와 관계가 없다고 할 수 있으나 과거의 연구개발비는 그 규모가 클수록 기업성과가 높아진다고 할 수 있다. 둘째, 연구개발비의 비재무적 자료인 연구소설립경과기간이 길수록 그리고 연구원의 수가 많을수록 주식투자수익률이 높아지는 것으로 측정되었다. 그리고 연구원의 수와 회계이익간에도 연구원의 수가 많을수록 회계이익이 상승한다고 할 수 있다. 따라서 당기의 연구개발비와 당기의 기업성과간에는 특정한 관계가 발견되지 않았으나 과거의 연구개발비를 당기 기업의 매출이나 수익의 증대에 영향을 미치고 있는 것으로 판단된다.
IDEA 알고리듬의 소프트웨어 구현과 하드웨어에 적용 가능한 VHDL 설계
김락현,염흥렬,윤호선 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.4 No.2
IDEA is a well-known block cipher algorithm with 64-bits input-length and 128-bits output-length, which is used in PGP of Internet. In this paper, we have presented the C++ Language software program and VHDL design for hard ware implementation. The structure of software has been designed in order to minimize the memory size and operate with high-speed by using C++ language. As a result, we have obtained the optimized software structure, and hardware structure for VHDL implementation, which allows a high-speed operation and a minimized chip size The result of this paper can be used for cryptographic devices using IDEA.
염흥열,윤호선,김상필 순천향대학교 부설 산업기술연구소 1997 순천향 산업기술연구소논문집 Vol.3 No.2
In this paper, we present the access control technique which is one of the essential functions for VOD. As the BISDN widely spreads, need for VOD services will rapidly be increased. Access control technique is needed to allow VOD system to prevent the unauthorized persons from using the unauthorized service. We have implemented the authentication scheme with C language on UNIX. We have used 768-bit RSA signature scheme and MD5 hash function for implementing the authentication scheme.
공개키 방식을 이용한 IMT-2000 키 분배 및 인증 시스템
염흥열,김락현,백종현 순천향대학교 부설 산업기술연구소 1997 순천향 산업기술연구소논문집 Vol.3 No.2
본 논문에서는 FPLMTS(Future Public Land Mobile Telecommunications System)의 구조를 분석하고, 이의 보안 측면의 특성을 분석하며, 기존의 이동통신시스템에서의 GSM과 USDC 방식의 여러 문제점을 분석한 후, 공개키 암호 방식을 적용한 FPLMTS에서의 효율적인 인증과 키 분배 방식을 제시한다.
염흥열,윤호선,김상필,이강석 순천향대학교 부설 산업기술연구소 1997 순천향 산업기술연구소논문집 Vol.3 No.2
본 논문에서는 무선 근거리 통신망에서의 프로토콜 구조를 분석한 후, 이를 바탕으로 무선 근거리 통신망에 적용 가능한 정보보호 규격을 제시하고, 기존의 보안 알고리듬의 문제점을 제시하며 그에 대한 해결 방안을 제시하여 정보보호 서비스를 실현하기 위한 정보보호 메카니듬을 도출한다.
Kim, Heung Youl,Kim, Hyung Jun,Park, Kyung Hoon,Cho, Bum Youn,Lee, Jae Sung Trans Tech Publications, Ltd. 2013 Applied mechanics and materials Vol.470 No.-
<P>In this study, the fire resistance performance of high-strength concrete columns was evaluated to see the influence of lateral confinement reinforcement with wire ropes for improving ductility, fire resistance reinforcement with fiber cocktail and load ratio. For this, loaded fire test was conducted under ISO834 standard fire condition. The axial ductility of the 60MPa high-strength concrete column reinforced with pre-stressed wire ropes was improved and its fire resistance performance was also improved by 23% compared with its counterpart without wire ropes. The appropriate load for the 60MPa concrete column reinforced with wire ropes was found to be 70% of design load. The fire resistance performance of the 100MPa high-strength concrete column reinforced with pre-stressed wire ropes and fiber-cocktail was improved as much as 4 times compared with that reinforced with tie bars only. The appropriate load for the 100MPa columns was found to be less than 70% of design load in order for the columns to secure required fire resistance performance.</P>
Endobronchial Metastasis of Malignant Melanoma, Diagnosed by Bronchoscopy -Report of A Case
Heung Tae Kim,Young Whan Kim,Si Young Kim,Yung Jue Bang,Sung Koo Han,Noe Kyeong Kim,Keon Youl Kim,Yong Chol Han,Hyung Geun Song,Hyun Soon Lee,Sang Kook Lee 대한내과학회 1988 The Korean Journal of Internal Medicine Vol.3 No.1
The Examination of Reliability of Lower Limb Joint Angles with Free Software ImageJ
Heung Youl Kim 대한인간공학회 2015 大韓人間工學會誌 Vol.34 No.6
Objective: The purpose of this study was to determine the reliability of lower limb joint angles computed with the software ImageJ during jumping movements. Background: Kinematics is the study of bodies in motion without regard to the forces or torques that may produce the motion. The most common method for collecting motion data uses an imaging and motion-caption system to record the 2D or 3D coordinates of markers attached to a moving object, followed by manual or automatic digitizing software. Above all, passive optical motion capture systems (e.g. Vicon system) have been regarded as the gold standards for collecting motion data. On the other hand, ImageJ is used widely for an image analysis as free software, and can collect the 2D coordinates of markers. Although much research has been carried out into the utilizations of the ImageJ software, little is known about their reliability. Method: Seven healthy female students participated as the subject in this study. Seventeen reflective markers were attached on the right and left lower limbs to measure two and three-dimensional joint angular motions. Jump performance was recorded by ten-vicon camera systems (250Hz) and one digital video camera (240Hz). The joint angles of the ankle and knee joints were calculated using 2D (ImageJ) and 3D (Vicon-MX) motion data, respectively. Results: Pearson"s correlation coefficients between the two methods were calculated, and significance tests were conducted (α = 1%). Correlation coefficients between the two were over 0.98. In Vicon-MX and ImageJ, there is no systematic error by examination of the validity using the Bland-Altman method, and all data are in the 95% limits of agreement. Conclusion: In this study, correlation coefficients are generally high, and the regression line is near the identical line. Therefore, it is considered that motion analysis using ImageJ is a useful tool for evaluation of human movements in various research areas. Application: This result can be utilized as a practical tool to analyze human performance in various fields.