e-CRM을 위한 웹사이트 방문자 성향분석 시스템의 설계 및 구현

김창근,김흥준,정연홍 진주산업대학교 산업과학기술연구소 2005 산업과학기술연구소보 Vol.- No.12

If web users visit highly attractive pages during the navigation pattern, they spend more time over viewing and visiting the pages. This can be important information for electric commerce as well as for website owners to analyze what web sufferer’s tastes are. This paper is designated to find out sufferer’s precise taste by estimating how much time sufferers’ spent in certain sites that they have visited.

인트라넷을 기반으로 한 구매 시스템의 설계 및 구현

김창근,김완규,김흥준 진주산업대학교 2000 산업과학기술연구소보 Vol.- No.7

As the uses of WWW are growing, the uses of internet and intranet are growing too. Many companies put into operation the computerization of job processing using the intranet. However, in the majority of the cases, intranets are limited by bulletins board, information floor and chatting room in the function. In this paper, internet shopping mall typed Procurement system based on intranet is designed and implemented.

유명산의 식물상 및 산림군락분류에 관한 연구

김흥식,김인수,홍금희,김남영,박광서,김정유,박완근 江原大學校 森林科學硏究所 2003 Journal of Forest Science Vol.19 No.-

2002년 3월부터 2003년 10월까지 유명산 자연휴양림을 대상으로 식물상과 산림군락구조를 조사한 결과, 관속식물이 98과 331속 570종 1아종 81변종 4품종 2교잡종으로 총 658종류로 나타났으며, 한국특산식물은 10과 14속 13종 2변종 1교잡종 총 16종류. 희귀 및 멸종위기식물은 9과 10속 11종 총 11종류, 귀화식물은 12과 22속 28종 총 28종류로 나타났다. 산림군락은 신갈나무-철쭉군목, 신갈나무-생강나무군단, 소나무-산거울군락, 잣나무-주름조개풀군락, 물푸레나무-신갈나무군락, 층층나무-신갈나무군락, 굴참나무-신갈나무군락, 싸리-신갈나무군락으로 전체 1군목, 1군단, 6군락이 분포하는 것으로 나타났다. The study was carried out to investigate the flora and community classification of forest vegetation in Mt. Yumyeong from March, 2002 to October, 2003. As a result of that, the vascular plants were 98 families, 331 genera, 570 species. 1 subspecies, 81 varieties, 4 formae, 2 hybrid, 658 taxa in all. Korean endemic plants were 10 families, 14 genera, 13 species, 2 variaties, 1 hybrid. 16 taxa in all ;, rare and endangered plants were 9 families, 10 genera. 11 species, 11 taxa in all ; naturalized plants were 12 families, 22 genera, 28 species, 28 taxa in all. The forest vegetation was classified into 1 order, 1 alliance. 6 communities : Rhododendro - Quercetalia mongolicae (Kim, 1990) Lindero - Quercion mongolicae (Kim, 1990) A. Carex humilis var. nana - Pinus densiflora Community B. Oplismenus undulatifolius - Pinus koraiensis Community C. Fraxinius rhynchophylla - Quercus mongolica Community D. Cornus controversa - Quercus mongolica Community E. Quercus variabilis - Quercus mongolica Community F. Lespedeza bicolor - Quercus mongolica Community

소하천 유역의 지형요소를 고려한 유출특성에 관한 연구 : 도달시간을 중심으로

김기흥,류근상 진주산업대학교 산업과학기술연구소 2004 산업과학기술연구소보 Vol.- No.11

In order to evaluate six formula of T_(c) presented in the facilities criterion of small basin, the water stages were observed on fifteen mountainous small basin in Sanchung county region. The results of six formula compared with the observed data to evaluate T_(c). All basin area were less than 2.25 ㎢. The average basin area was 1.19 ㎢, the average basin length was 1.65 ㎢, the average basin slope was 6.95%. The average length and slope of main channel were 1.86 ㎞ and 7%. The observed data of T_(c) showed large difference from results with each formula in all basin relatively. The conclusions obtained in this study are as follows. The time of concentration depended on Kerby's formula, SCS's Lag formula and KICT's formula was estimated in mountainous small basin excessively. The time of concentration depended on Rziha's and Kraven's formula was estimated small. And the time of concentration depended on Krpich's formula was safe relatively.

전류형 인버어터-유도전동기 시스템의 최적효율제어 루우프의 해석

金興根 경북대학교 공과대학 1985 工大硏究誌 Vol.14 No.-

Current source inverter fed induction motor drive system is analyzed to assess the stability and dynamic response of the optimal efficiency control loop. To compare with the well known constant flux control loop, the poles and zeroes of the system are found. The results show the stable operation and good dynamic response.

소하천 유역의 도달시간 관측에 관한 연구

김기흥,류근상,신영철,이형래 진주산업대학교 산업과학기술연구소 2004 산업과학기술연구소보 Vol.- No.11

In order to evaluate six formula of T_(c) presented in the facilities criterion of small basin, the water stages were observed on fifteen mountainous small basin in Sanchung county region. The results of six formula compared with the observed data to evaluate T_(c). All basin area were less than 2.25 ㎢. The average basin area was 1.19 ㎢, the average basin length was 1.65 ㎢, the average basin slope was 6.95%, average length and slope of main channel were 1.86 ㎞ and 7%. The average T_(c) was 33.77 minutes and results of six formula showed the changes in average and standard deviation widely. The conclusions obtained in this study are as follows. The time of concentration was influenced basin slope, basin length, basin slope and channel slope consequently but did not affected the shape factor of basin.

전자상거래를 위한 지불결제 시스템 구현

김흥준,손세일,김창근 진주산업대학교 산업과학기술연구소 2004 산업과학기술연구소보 Vol.- No.11

New and safe ways of payment such as electronic wallet, electronic money and electronic check have been developed and implementation of a secure credit card-based payment system. The system ensures that the payment information must be new and it can operate with the old credit card system.

誘導電動機의 單位 電流當 最大 토크 運轉에 관한 硏究

金興根,成耆冽,崔協右 慶北大學校 1990 論文集 Vol.49 No.-

This paper describes maximum torque drive of a vector controlled induction motor. As the instantaneous value of the stator current must be controlled to accomplish the superior vector control characteristic, the current controlled PWM transistor inverter with hysteresis controller is adopted. At steady-state, since the developed motor torque is proportional to the product of the flux and torque component, the motor output torque becomes maximum if the two components are equal. The system block diagram is suggested for maximum torque control. The superior characteristic of the proposed system is verified with digital computer simulation.

Thread filter에 가향 처리된 권련담배 주류연에서 호프만 성분의 측정

곽호근,이진희,임흥빈 충북대학교 연초연구소 2009 煙草硏究 Vol.22 No.-

소비자가 원하는 향끽미 유지를 위한 담배 각초 가향은 연소하면서 일부 열분해 나열합성되어 Mainstream중 유해성분 생성원인이 될 수 있다. 그러나 Thread filter 가향은 이런 효과를 방지할 뿐만 아니라 향강도를 조절하여 원하는 향끽미를 유지할 수 있는 장점이 있어 최근 Thread filter 가향에 대한 연구가 많이 진행되고 있다. Thread filter 가향이 담배연기 중 좋지 않은 성분에 이행을 증감시켜 주는 지를 검증하기 위하여 Thread filter에 제라니움과 카모마일 essential oil을 각각 8% 처리한 권련담배와 대조군을 중량 0.85 ± 0.05 g, 공기희석율 66.0 ± 3.0 %, 흡인저항 84.0±5.0mmH20로 선별하고, 주류연 중의 호프만 성분의 함량을 비교하였다. 담배연기 Mainstream중의 제라니움 주성분인 geraniol의 이행량은 0.051 ppm/cig이었으나 카모마일 오일의 주성분인 linalool의 이행량은 trace 양으로 검출되었다. 한편, 호프만 성분 중에서 HCN 함량은 Thread filter에 제라니움과 카모마일 오일을 처리한 권련이 대조군에 비해 약간 낮고 아세트 알데하이드는 오히려 대조군에서 높은 경향을 나타내었으나 통계적으로 두 성분 모두 유의한 차이가 없었다. 그러나 formaldehyde와 isoprene의 함량은 가향 처리한 담배의 주류연에서 대조군에 비해 높았으며(p<0.05), 그 이외의 카보닐 화합물, 페놀성 화합물, 나프틸 아민류 및 휘발성 성분 등과 같은 호프만 성분의 함량은 대조군과 가향 처리한 권련과 통계적으로 유의한 큰 차이를 보이지 않았다. 따라서 Thread filter에 가향 처리는 담배연기 주류연에서 호프만 성분 중 일부 저분자량의 fomaldehyde와 isoprene과 같은 성분의 함량에는 영향을 미칠 수 있을 가능성이 있지만 그 이외의 성분 함량에는 큰 변화를 주지 않을 것으로 판단된다. Adding the aromatics to tobacco in order to maintain the flavors at the consumer's require in cigarette smoke can be a factor of detrimental compounds formation to health, while burning. However, many research have reported that adding the flavors to thread filter had the advantage of prevention harmful components to generate, as well as maintenance the flavors in cigarette smoke. We analysed the Hoffman's list components in mainstream, after conditioning and adding the thread filter to 8% essential oils extracted from Geranium and Camomile. The selection condition of experimental cigarettes was 0.85 ± 0.05g in weight, 84.0 ± 5.0 mmH₂O in pressure drop, and 66.0 ± 3.0 % in air ventilation. Transfer rate of geraniol, major compound, to mainstream of Geranium treated cigarette was 0.051 mg/cig. HCN content in oil treated cigarette was lower than the control, acetaldehyde content was higher than the control without any significance. But, the concentration of formaldehyde and isoprene in mainstream was only higher than the control. The concentration of carbonyl, phenolic, volatile compounds, and naphthylamines of Hoffman's list was no big difference significantly. Therefore, these results indicate that contents of most of Hoffman's list compounds in mainstream was influenced greatly by adding the flavor to thread filter of cigarettes, although molecules with low molecular weights such as formaldehyde and isoprene could be affected.

電流 制御形 PWM 초퍼에 의한 磁器 浮上用 電子石 驅動에 관한 硏究

徐輔爀,全舜鏞,成耆洌 慶北大學校 1991 論文集 Vol.51 No.-

This paper designs a chopper system to drive a magnet of a magnetic levitation system. The chopper system consists of bridge type chopper with two switching devices and two freewheeling diodes. For the given system, harmonic component of source current is analyzed according to its freewheeling type. Also, its operating charateristic is analyzed by simulating the load current waveform according to the type of current controller. From the results of simulation and harmonic analysis, in terms of current controllability, current ripple and switching frequency, load freewheeling type chopper system wish ramp comparison controller is proven to be suitable. Thus the load freewheeling type chopper system with ramp comparison controller is designed and the feasibility of the proposed system is examined through experiment.