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오형근,이임영 순천향대학교 부설 산업기술연구소 1999 순천향 산업기술연구소논문집 Vol.5 No.1
An important requirement for Electronic Cash protocol is a anonymity fo the user. Electronic cash structured by a digital stream use blind signature, a special signature scheme, to get bank's signature guaranteeing user's privacy. The concept of blind signature scheme was introduced by Chaum and its numerous variants are proposed. In this paper we propose a new blind signature drive from a variation of the KCDSA. It is a blind KCDSA signature scheme with message recovery and useful in electronic cash protocols. Also its security equal the KCDSA.
Splitter 급전에 의한 원편파 단일 패치안테나 설계
이용창,손태호 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.4 No.2
In this paper, the feed type of the antenna is simply a microstrip T-junction where one of the arms that splits off to the antenna is made 90 degree longer than the other. Optimum feed locations are determined for the best impedance match to a 50Ω coaxial cable and the frequency of 6.14MHz(C-band) is used as the center frequency.
이용한,김선형 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.4 No.1
본 논문은 사용자의 입장에서 전화망, 무선전화망, 패킷교환망의 품질을 측정하여, ITU-TS 나 우리나라의 기술수준을 만족하는가를 아산시의 서비스품질을 측정을 통해 적합한지를 분석하고 그 개선방안을 강구하고자 한다. This paper was measured PSTN, PSDN, and Wireless network QoS by user in Asan city. Tell us wheather Asan's QoS is satisfied ITU-TS or recommendation of Korea QoS. We analyed technical aspects and inprove it.
효율적인 상업부기교과 학습을 위한 CAI 프로그램설계 및 구현에 관한 연구
홍인식,신태균 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3
In the information society, reasonable and efficient attitude is required in ordinary life. It is regarded as a liberal art in these days therefore commercial book-keeping is needed not only by people who engage in business but also by common people. For this reason, the students should take the commercial economics, commercial book-keeping and electronic data processing system as compulsory subjects in vocational course of general high school in 6th curriculum. The purpose of this paper is to examine how commercial book-keeping using the CAI program can influence classwork achievement and to search for an effective learning method to implement this program.
공용해,김명숙,최인석 순천향대학교 부설 산업기술연구소 1999 순천향 산업기술연구소논문집 Vol.5 No.2
Low quality character images include a lot of variousness and noises, so the use of a single classifier is difficult to achieve a high recognition performance. For this, we experimented various feature extraction methods suitable for low quality images and constructed a classifier-pair that uses two complementary features. The experimental result using this classifier-pair was very effective for the recognition of low quality character images.
송월봉,박두순,장유숙 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3
In this paper we present a new theory of linear loop transformations called Elimination of Data Dependency(EDD). The current framework of linear loop transformation cannot identify a significant fraction of parallelism. For this reason, we presents a method to extract the maximum loop parallelism in perfect nested loops. Our technique is applicable to general loop nests where the dependences include both distances and directions. This theory provides the foundation for solving an open question in complication for parallel machines: which loop transformations, and in what order, should be applied to aceive a particular goal, such as maximizing parallelism. This paper presents an efficient loop transformation algorithm based on this theory to maximize the degree of parallelism in a loop nest. We present the results of experiments that demonstrate that EDD can result in substantial performance improvements.
유홍진 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3
Adsorption rates for pure CO₂and N₂were studied at 313 and 343 K because these can play a key role in designing a PSA bed. TGA(thermogravimetric analysis) technique was used for the collection of adsorption rate data and domestic-and foreign-produced activated carbons were used as adsorbents. Adsorption rates of CO₂were much faster than those of N₂.
티타늄(Ti)을 기초로 한 촉매(TiCl₄/ or CpTiCl₃)의 종류가 스틸렌-에틸렌 공중합체(Copolymer)의 구조에 미치는 영향
하진욱 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3
본 연구에서는 Ti를 기초로 한 두 가지 다른 촉매계(CpTiCl₃-MAO and TiCl₄-MAO)를 사용하여 제조하였다. 제조된 스틸렌-에틸렌 공중합체(copolymer)의 구조와 열적 특성은 C-NMR(Nuclear Magnetic Resonance)과 DSC(Differential Scanning Calorimetry)를 사용하여 고찰하였다. 두 촉매계 모두 메틸알루미녹센(MAO)을 조촉매로 사용하였다. C-NMR 결과 CpTiCl₃촉매계에서 제조된 공중합체는 신디오택틱 폴리스틸렌(snydiotatic polystyrene)의 주사슬(main chain)에 에틸렌 단위(unit)가 결함(defect)으로 무작위(randomly)로 분산 된 구조를 보인 반면, TiCl₄촉매계에서 제조된 공중합체는 폴리에틸렌(polyethylene)의 주사슬(main chain)에 스틸렌 단위가 결함(defect)으로 무작위(randomly)로 분산 된 구조를 가짐을 알 수 있었다.
한현각 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3
An experimental investigation was performed to study the minimum transport velocity through horizontal pipe lines for bidispersed suspension. Experimentally determined settling velocity of uniform solid suspensions was used to develop a methods for the calculations of the minimum transport velocity in which fine particles and fluid media are assumed to be a hypothetical fluid phase. The result agreed with experiments within 10% of R.M.S. deviation for total solid concentration up to 15% and various ratios of fine coarse particles.