유치거리 분석을 통한 도시공원의 적정배치에 관한 연구

류연수,나정화,도후조 慶北大學校農業科學技術硏究所 2002 慶北大農學誌 Vol.20 No.-

The purpose of this study is to analysis of disposition distance of city park for the plan of suitable arrangement of city park based on the date examining Daegu Metropolitan City. The results of this study are as follows. 1) The result of analysis of population density as the case of districts, it appeared highly in city center area which Seo-Gu district and Nam-Gu district besides Jung-Gu district. However, it apperared in a low Buk-Gu district, Dong-Gu district and Salseong-Gun. 2) The result of analysis of population density as the case of regions, it appeared very highly Joukjun-Dong of Dalseo-Gu district(31,554per/㎢), Naedang-Dong of Seo-Gu district(29,922per/㎢). However it appeared in a low YeugaoMaen(85per/㎢) and Gachang-Maen(94per/㎢) of Dalseong-Gun. The regions where the population density is high have very low green space and live a lot of low income layer. 3) The result of analysis of disposition distance, in the case of children park, it appeared an intensive distribution in Dongcheon-Dong and Guam-Dong of Buk-Gu district, Whanggm-Dong and Dusan-Dong of Suseong-Gu district, Sangin-Dong and Yeongasn-Dong and Walsung-Dong of Dalseo-Gu district. however, it appeared in a low in Jung-Gu district. The case of urban park of the neighboring area, it appeared the most in Dalseo-Gu district except 2 parks in Jung-Gu district, the case of urban park of the walking area, it apperared in equality in city. 4) In conclusion, the area have population density and lots of low income layer, is in out of disposition distance should be considered in first for city park plan.

압저항형 스마트 실리콘 압력 센서의 설계

정후민,신윤권,조상복,이종화 울산대학교 2001 공학연구논문집 Vol.32 No.2

압저항형 스마트 실리콘 압력 센서를 0.6 ㎛ 이중 폴리 실리콘 이중 금속 CMOS 공정으로 구현하기 위하여 설계하였다. 이 스마트 실리콘 압력 센서는 압저항형 저항기들로 된 휘스톤 브리지를 갖는 다이아프램과 op-amp, A/D 변환기, 및 UART 회로 등의 주변회로 들로 구성되어 있다. 브리지 회로의 출력 전압과 압력에 의한 기계적 응력 사이의 관계를 COSMOS-M 상용프로그램으로 다이아프램의 응력 분포를 모의실험하여, 압저항기의 최적의 위치와 크기에 대한 연구를 하였다. CMOS op-amp 회로는 규정된 출력 특성을 얻기 위하여 크기가 다른 트랜지스터들로 설계하여 HSPICE로 모의실험하여 최적화 시켰다. A/D 변화기 회로는 가능한 칩 면적을 줄이기 위하여 서브 레인징 기법과 신경 MOSFET 구조를 이용하여 설계하였다. UART회로는 VHDL 소스 코드와 셀 라이브러리를 이용하고 Synopsys로 합성하여 설계하였다. 회로의 물리적 레이아우트 설계는 Mentor 틀로 설계하였다. 그러나 온도보상회로와 출력오프셋 문제는 아직 해결하지 못하고 다음에 연구할 예정이다. A piezoresistive smart silicon pressure sensor is designed to implement with 0.6 ㎛ double-polysilicon double-metal CMOS precess. This smart pressure sensor is composed of a diaphragm with piezoresistive resistors' Wheatstone bridge and the peripheral circuitry of op-amp, A/D converter and UART. The relationship between the output voltage of the bridge circuit and the mechanical stress by applied pressure was studied by simulating the stress distribution on the diaphragm with COSMOS-M package program to optimize the size and position of piezoresistors. The CMOS op-amp circuit was designed with different CMOS transistor sizes to obtain the defined op-amp output characteristics and simulated with HSPICE. The A/D converter was designed using neuron MOSFET structure and sub-ranging method to minimize the chip area. The UART circuit was designed by using VHDL source code and cell library and by synthesizing with Synopses and the physical layout of the circuit was designed with Mentor tools. The problems for temperature compensation and the output voltage offset were not yet considered.

OFDM 수신기를 위한 주파수 옵셋 추정 기법

위정화,황유모 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-

In this paper, we propose a robust frequency offset estimation method of OFDM signals. A carrier frequency offset may be decomposed into an integer multiple of the subcarrier spacing and a residual frequency offset. Fractional part of frequency offset is obtained by using the maximum likeihood estimation(MLE) method. We use the correlation of the samples at the output of the discrete Fourier transform(DFT) to estimate integer part of frequency offset. Simulation results show that the estimation frequency offset is almost linear to frequency offset. We propose to an improved estimation error variance of the carrier frequency offset estimation. The proposed estimator has better performance than the conventional ones in terms of error variance and tracking range.

地方政府間의 廣域政府管理體制의 構築方案에 관한 硏究

윤정길,허석 건국대학교 1997 政治論叢 Vol.32 No.-

OFDM 수신기를 위한 채널 등화 알고리즘

위정화,황유모 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-

In this paper, we propose 1-tap ACDFE(Additional Coefficient DFE) channel equalization algorithm which use the frequency domain DFE(Decision Feedback Equalization) with additional coefficients and confirm its performance in applying minimum mean-square error(MMSE) criterion. It is confirmed by computer simulations that the proposed ACDFE has better performance than the conventional DFE in terms of SER and MSE. The ACDFE has advantages which are the speed of convergence and robust operation in Doppler shift by additional coefficient which is independent of subcarrier.

인슐린유사성장인자-I이 MC3T3-E1세포의 알칼린인산효소 활성도에 미치는 영향

이후정 慶北大學校 齒科大學 1997 慶北齒大論文集 Vol.14 No.-

공주시의 피뢰침 분포분석

蘇鮮燮,許正範 공주대학교 기초과학연구소 2000 自然科學硏究 Vol.9 No.-

전세계적으로 낙뢰는 연간 100억회 정도의 발생과 이로 인한 인명 피해가 2000∼3000명에 이르고 있고,낙뢰에 대한 관심도가 점점 높아지고 있다. 이에 공주지역의 낙뢰에 대한 대비책인 피뢰침 설치 비율을 분석해 보았다. 모비율 점추정으로 피뢰침 설비를 추정해본 결과 공주 시외지역의 피뢰침 설치율은 0.02%를 보이고 있고, 시내지역은 0.032%를 보이고 있다. 공주 시외지역의 피뢰침수는 489개이고 시내지역은 613개를 보이고 있다. 결과적으로 공주지역의 낙뢰에 대한 대비책은 미비한것을 알 수 있다. All over the world, the Thundervolts in which take gradually a growing interest strike practically an annual 10bilious times, therefore the hatural disaster makes 2000 ∼ 3000 casualties. We made a vigorous examination of the ratio of the establishment of the anti-volt tower in Kong-ju, by way of precaution against the thundervolts. It is estimatied that the ratio of the suburbs of Kong-ju is 0.02% and the city is 0.032% by population rate of point estimation. The number of the anti-volt tower which is already established in the suburbs of Kong-ju is 489 and the city is 613. For that reason, there is unprepared far the Thundervolts in Kong-ju.

대장에 발생한 샘암종에서 MUC1과 MUC2 점소 발현의 의의

이윤경,이주호,이용,심재영,박정훈,오수섭,박진실,기근홍 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.2

Background : Mucins possess the unique function of protecting and lubricating the epithelial surface and other important functions such as call growth, direct implication in the fetal development, the epithelial renewal and differentiation, the epithelial integrity, carcinogenesis, immune regulation, cellular adhesion and metastasis. Purpose : This study was done to provide the significance of alteration of MUC1 and MUC2 expression in colorectal adenocarcinoma, A series of 131 colorectal adenocarcinomas including 11 mucinous carcinomas were screened immunohistochemically for their expression of MUCI and MUC2, Materials and mehtods : Of 131 carcinomas, 76 (58,5%) were MUCI positive and 91 (68, 9%) were MUC2 positive, In normal colonic goblet cells, MUCl was not expressed but MUC2 was expressed in cytoplasm, Conclusion There were up-regulation of MUCI and down-regulation of MUC2 in colorectal carcinomas, The frequency of MUC2 positivity according to differentiation was statistically reliable. (p=0.0001)

우모 분해균의 분리 및 특성에 관한 연구

강호조,이후장,정태성,김도경,어용준,김재황 한국수의공중보건학회 2003 예방수의학회지 Vol.27 No.3

Feather waste, generated in large quantities as a byproduct of commercial poultry processing, is almost pure keratin, which is not easily degradable by common proteolytic enzymes. Several feather-degrading bacterial isolates were isolated from feather waste and soil. These isolates were able to degrade chicken feather, when grown on basal medium containing 1.0% native feather as a source of energy, carbon, and nitrogen. The isolates were characterized according to morphological characteristics and biochemical tests, and Vitek and API kit system. belonging to the Acinetobacter calcoaceticus complex, Bacillus thuringiensis, Bacillus circulans, Bacillus cereus. It was observed that aerobic growth by the isolate on single whole chicken feather, resulted in complete degradation of the keratin protein after 5-6 days of incubation at 37℃. The production of protein by the organism was decreased with cultivation time, with the maximum activity coinciding with the start of the stationary phase. The kerationolytic activity increased with cultivation time.

한국어 자료 사전 구축을 위한 데이터 구조와 노드 구성 형태

박기홍,이태헌,정정후 群山大學校 1996 論文集 Vol.23 No.-

Korean analysis systems require a large-scale data dictionary and the built dictionary is very frequently searched during the morphological analysis. For the more efficient system, we must construct the dictionary that has fast size- independent search time and makes efficient use of storage which preserves the basic characteristics of Trie. As regards both side of search time and memory space, we know that search time of double Trie structure using double array is suitable for construction of Korean data dictionary, and the type which we separate each mode by phoneme-unit is more useful to Korean processing.