협대역 ISDN에서의 중대역 교환기능 실현에 관한 연구(Ⅰ) : 회선교환 모드에 의한 실현방안 Realization Scheme Based on the Circuit Switched Mode

曺圭燮,林海鎭 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.2

Prior to the national narrowband ISDN commercial service, it is necessary to develop the wideband switching capability in order to prepare the needs for wideband services which are expected to increase rapidly in the near future. Among the wideband channels, HO channel switching is expected to be implemented based on the present narrowband ISDN switch. In the development of HO channel switching, both of circuit switched mode and packet switched mode must be implemented like narrowband case. In this paper, an implementation scheme of wideband switching function on the existing TDX-lB/ISDN switch based on the circuit switched mode is suggested. For this, we proposed multi-time slot assignment method using divided in two channel table and addition of dedicated wideband switch method which utilizes existing switch module. We also surveyed the applicability of the two methods to the TDX-1B/ISDN switch. Based on this survey, we finally proposed a implementation scheme adopting the two methods par tially.

돼지의 流通段階別 價格循環分析

崔奎燮 慶北大學校 1982 論文集 Vol.34 No.-

This study intends to document the existing cyclical fluctuations of hog price at different market level such as young pig, and pork markets during the period of 1969~1980 in Korea. The existing pattens of such cyclical fluctuations were estimated systematically by removing the seasonal fluctuation and irregular movement as well as secular trend from the original price through the moving average method. It was founded that the cyclical fluctuations of hog prices repeated four times during the same period, also the amplitude coeficient of cyclical fluctuation showed the highest in young pig market and the lowest in pork market relatively tending slow in recent years. It was noticed that the cyclical fluctuation of prices in young pig and pork market fall behind by two or three months compared to that of pig market.

農家所得 決定要因의 計量的 分析

崔奎燮 경북대학교 1981 새마을 硏究論叢 Vol.1 No.-

The study was designed to find out the role of determinants of farm household income in Korea. also to document the existing structural change of those determinants between the period of 1960's and 1970's. To estimate the role of determinants of farm household income, the farm household income determinant (FHID) equations were built and tested respectively with high significance for the two periods. The coefficients of those FHID equation were inelastic in the period of 1959∼67 and highly elastic in the period of 1968∼79. The contribution of land productivity to the increased farm household income were on the average showed by 0.3 percent in the 1959∼67 period, but those of the agricultural terms of trade and non-farm income were showed respectively by 1.4 percent and 1.9 percent yearly. It was found that the contribution of land productivity to the farm household income was increased by high level of 5.3 percent annually in the period of 1968∼79, and also those of the agricultural terms of trade and non-farm income were increased by 4.8 percent and 1.7 percent respectively in the same period. To increase the farm household income in the future, the Korean rural economy holds complicated factors such as low land productivity, rigidity of the agricultural terms of trade and instable non-farm income sources, hence the policy of government increasing farm household income in the future should focussed on the developing non-farm income sources like in Japan and Taiwan.

증편의 저장 중 조직 특성 변화

張奎燮,李貞植,崔錫鉉,朴榮德 충남대학교 농업과학연구소 1991 농업과학연구 Vol.18 No.2

This study was carried out to investigate the storage conditions and methods required for commercializaion of Jeung-Pyon. The storage characteristics of Jeung-Pyon were examined with Universal Testing Machine (UTM. Instron model 1000) for textural properties during storage of tinder the conditions such as sealing, nonsealing, and temperatures. The differences in storage characteristics on the different varieties and years of rices were not shown. When the Jeung-Pyon was lost it's quality as a commercial product, the measured value of UTM was increased as hardness 0.74㎏ to 1.0㎏, gumminess 0.23㎏ to 0.59㎏, chewiness 6㎏.mm to 18㎏.mm, but decreased in adhesiveness 0.65㎏.mm to 0.40㎏.mm, cohesiveness 0.61 to 0.34, springiness 41㎜ to 32㎜. The nonsealed Jeung-Pyon was lost it's quality for storing at room temperature because of the case-hardening after 2 days. In the case of sealed Jeung-Pyon, the case-hardening phenomena by the evaporation of moisture was not occured, therefore it was a significant factor for an extension in sealed Jeung-Pyon. The shelf-life of sealed Jeung-Pyon was 20 days and 5 days respectively during storage at -20℃ and 20℃ The sealed Jeung-Pyon stored at 5℃ was lost it's quality, in consideration of cold chain this temperature was suitable for retrogradation of starch. The Jeung-Pyon sealed with air and mosture proof packaging material stored at the accelerated condition as 92% R.H. and 35℃ lost it's quality within two or three days.

觀光農業開發을 위한 消費者 選好 分析

崔奎燮,金兌均 경북대학교 경제경영연구소 1992 經商論集 Vol.20 No.2

Point-Location모델을 이용한 산지시장가격의 동태적 구조 분석

최규섭,권용덕 한국농업정책학회, 한국축산경영학회 2000 농업경영정책연구 Vol.27 No.1

This study uses a cointegration method based on point-location model to analyze spatial price relationship among kyungpook cattle markets in korea. According to the results, there is a cointegration relationship between prices of male and female cattle markets. This suggest that these markets are linked with the single market spatially. The prices of Koryoung female cattle market in south and Youngju female cattle market in north have influence on the price change of other female cattle market and play an important role in price movement of other female cattles. In case of impulse response results, the price of female cattle market appears to adjust to equilibrium level faster than that of male cattle market.

근적외선(NIR) 분광법에 의한 수삼의 성분 측정

장규섭,이의석,이규희 충남대학교 농업과학연구소 2001 농업과학연구 Vol.28 No.2

종래의 화학적 방법에 의한 일반 분석으로 수분, 전분, 회분, 조섬유, 칼슘, 마그네슘 등의 성분 분석 결과 수치와 근적외 분광 분석기를 이용하여 검량선을 작성 한 결과, 결정계수 (R²)는 전분(0.951), 칼슘(0.933), 수분(0.918), 회분(0.897), 조섬유(0.728), 마그네슘(0.390)의 순으로 높았고, 조섬유와 마그네슘의 경우는 결정계수 값이 다소 떨어지는 경향이 있었지만, 기존의 분석 방법과 유사한 경우를 얻었다. 향후 계속적인 시료의 보강과 모집단 분석을 이용한 체계적인 확충을 통해 얻어진 개량된 검증식을 사용하게 된다면 앞으로 수삼의 분석을 효과적으로 수행할 수 있을 것으로 사료된다. Fig. 8은 검량선 작성 시 마그네슘 함량의 일반 분석법에 의한 분석치와 NIR에서 도출해낸 분석치와 상관관계를 나타낸 것이다. 두 분석치 간의 결정 계수(R^(2))가 0.390으로 검량식 작성이 되었다. 다른 성분에 비해서 변이가 다소 크게 나타났는데 시료간의 체형의 차이로 알 수 있었으며 시료간 변이의 폭이 매우 적었다. 앞으로 칼슘 함량이 높은 시료를 채취하여 보안하면 R^(2)은 크게 높일 수가 있을 것이다. The measurement values of proximate composition in fresh ginseng could provide the important information for red ginseng processing. The measurement of them were performed by near-infrared (NIR) spectroscopy. Linear regression model for the predicting of proximate composition was developed and validated. The regression values of moisture, crude starch, crude ash, crude fiber, calcium, and magnesium contents were shown as 0.918, 0.951, 0.897, 0.728, 0.933, and 0.390, respectively,. Therefore, the proximate composition of fresh ginseng could be measured by NIR feasibly.

Ad-hoc 무선망에서의 TCP 프로토콜 성능 분석

박승섭,이규남 釜慶大學校 2002 釜慶大學校 論文集 Vol.7 No.-

Ad-hoc networks consist of a set of mobile hosts that communicate using wireless links, without the use of other supporting communication facilities (such as base stations, etc.). Therefore, the topology of an Ad-hoc network freguently changes due to the movement of mobile host, which may lead to sudden packet loss. Recently, the large amount of research has focused on the routing protocols needed in such an environment. However, the researches of comparison analysis on TCP versions over Ad-hoc network have not fully studied. Accordingly, in this paper, TCP Reno, Sack, and Tahoe versions are analysed using DSR protocol which is the representative On-Demand routing protocol in Ad-hoc wireless network. As the result of this simulation, we know that TCP Reno has higher throughput than Sack and Tahoe, and TCP Reno has more stable performance than TCP tahoe and Sack, regardless of the speed of mobile node and the size of topology.

고속 데이터 패킷 전송을 위한 다중경로 간섭제거기의 성능 비교

김규섭,임성빈 崇實大學校 生産技術硏究所 2002 論文集 Vol.32 No.-

One of problems associated with high-speed data packet transmission systems such as HW-CDMA and 1xEVDO in CDMA2000 is that they show seriously low performance for m channels. The main reason for this is that a high-speed data packet transmission system higher-level modulation schemes such as 8PSK, 16QAM and 64QAM, which have relativel Euclidean distance between symbols. Such schemes are very sensitive to interference and/or no purpose of this paper is to compare the performance and complexity of the multipath inte cancellation algorithms for high-speed data packet transmission. The algorithms considered in are MPIC (Multi-Path Interference Cancellation), SWCE (Sliding-Window Chip Equalizer) and I (Iterative Decision Feedback Equalizer with Hard Decision), which are the existing and propos for minimitigating the effect of multipath interference.

고추·마늘·양파의 價格動向과 變動패턴 分析 : 農家所得의 安定化를 중심으로

崔奎燮 경북대학교 1986 새마을 硏究論叢 Vol.6 No.-