體質과 病理에 따른 皮膚콘덕턴스 水潗의 檢討

조봉관 釜山工業大學校 1991 論文集 Vol.33 No.-

Skin conductance level (SCL) is used to differentiate pathological states of the individuals. The measurements are made on the back of the second metacarpals, according to the Zhang's biological whole body medical treatment method. SCL was measured in 38 healthy subjects, and for 98 patients with lung, liver, stomach and kidney diseases, or with paralysis. The following tendencies were ovserved. (ⅰ) SCL of patients with above diseases is generally lower than that of the healthy subjects. (ⅱ) In healthy examinees, SCL of micro-positive physical constitution is generally higher than that of micro-negative and macro-negative constitutions. (ⅲ) In patients with above diseases, SCL of micro-positive physical constitution is generally lower than that of micro-negative and macro-negative physical constitutions, and vice versa.

산불진화정보 관리를 위한 Mobile GIS 공간 데이터 압축기법 개발

조명희,이명보,이시영,김준범,권봉겸,허영진 한국지리정보학회 2004 한국지리정보학회지 Vol.7 No.2

최근 무선 인터넷 및 통신기술의 눈부신 발달과 LBS(location based service)개념을 기반으로 한 mobile GIS 기술 개발은 대규모 산불 발생시 정확한 현장 파악과 신속한 상황보고 뿐만 아니라 사고 예방과 분석·평가에 이르기까지 의사결정지원시스템으로 자리를 잡고 있다. 본 연구에서는 지상진화대의 정확한 위치와 이동상황을 실시간으로 파악하여 안전한 진화작업 유도 및 산불진화 환경정보를 제공을 목적으로 mobile GIS 기술 기반의 산불진화정보 관리시스템을 설계하고 네트워크 부하감소를 위하여 '.gci'라는 공간 데이터 압축기법을 개발하여 면, 선, 주기 데이터에 대하여 51~62%의 높은 압축률을 구현하였다. 따라서 대규모 산불 발생시 일어날 수 있는 안전사고를 미연에 방지하고 사고 발생시 신속한 후속조치로 안전하고 과학적인 산불진화 업무를 수행할 수 있도록 하였다. Recently GPS and mobile GIS technologies based on LBS (location based service) have played an important role as DSS (decision supporting system) for domestic forest fire extinguishment policies. In this study forest fire extinguishments information management system based on mobile GIS technique was designed to seize the exact location on wireless network so that it helps to guide the safe and efficient extinguishments affairs and provide the extinguishments environment toward ground fighting teams and the central forest government in real time. Moreover, possibly to operate this system, the foundation technologies by the name of `. gci such as the spatial data compression method, the spatial data transmission method over wireless network and the spatial analysis interface on PDA should be mainly considered. Especially, in this study the spatial data compression method having high compression rate from 51% to 62% for each polygon, line, and point data, without the loss of data was developed.

고온건식탈황 유동층 반응기에서 아연계 탈황제의 재생반응에 미치는 산소농도의 영향

조성호,이봉희,진경태,이창근 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.6

Zinc titanate 탈황제를 사용하여 내경 4.5㎝인 소형유동층 반응기에서 재생반응특성을 연구하였다. 산소농도를 5%에서 21%까지 변화시키면서 재생실험을 수행하였다. 산소의 농도변화에 따라 배출되는 SO_2의 최대농도는 양론적으로 이론치와 일치하였다. 발열반응으로 인한 재생반응기의 온도상승은 산소농도가 증가함에 따라 증가하였다. 2차 황화반응 초기에 SO_2가 발생되지 않는 것으로 보아 sulfate가 형성되지 않았다는 것을 확인할 수 있었다. 재생반응 후 시료의 물리-화학적 특성 분석결과 zinc titanate 탈황제는 부반응 및 물성변화가 없는 것으로 판단할 수 있었다. 이와 같은 실험으로 분무 건조법으로 성형된 zinc titanate 탈황제는 유동층 반응기에서 산소농도 21%의 공기로 재생 가능성을 보여 주었다. The regeneration characteristics of spray-dried zinc titanate sorbent in a fluidized bed reactor were examined at temperatures of 650℃ and 700℃ with the regenerated gas of the oxygen concentrations from 5% to 21%. The outlet SO_2 peak concentrations were coincided with the theoretical values depending on inlet O_2 concentration. As the oxygen concentration was increased, the temperature rise in the regeneration reactor was increased due to the heat of exothermic reaction. During the initial stage of the second sulfidation reaction, SO_2 was not detected in the outlet gases. It was an indirect indication that zinc sulfate had not been formed during the first regeneration reaction. The various analysis results showed little differences in physical and chemical properties between fresh and regenerated sorbent.

民法上의 解除權에 관한 考察 : 根據와 效果를 중심으로

조봉제,김우덕 부산여자대학교 사회과학연구소 1998 사회과학연구 Vol.- No.2

공기재생용 고온건식탈황제의 가압유동층 반응기에서의 사이클 성능실험

조성호,이봉희,이중범,류청걸,진경태,이창근 한국화학공학회 2002 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.40 No.2

고온고압 기포유동층 반응기에서 분무건조기로 성형제조한 아연계 탈황제(ZAC C)에 대하여 총 6회 황화-재생 반복실험을 500℃, 5atm 조건에서 수행하였다. 1% H_2S를 포함한 석탄모사가스를 반응기에 주입하여 황화반응을 시킨 결과 배출가스 중 H_2S 농도는 10ppmv 이하로 유지되었다. ZAC C의 황흡수력은 6회 황화반응 동안 각각 11.1, 10.9, 11.1, 11.1, 10.9, 10.5g S/100g sorbent으로 유지되어 초기 황흡수력을 유지하였다. 공기를 이용한 500℃ 재생반응에서 배출되는 SO_2의 최대농도는 양론적으로 이론값과 일치하였다. 재생반응에서 탈황제 층의 온도는 발열반응에 의해 500℃에서 최대 750℃까지 상승하였다. 연속 70시간 동안 유동층 반응기내에서 실시된 ZAC C 탈황제의 비산되어 유출된 양은 1.07%이고, 실험 후 탈황제의 크기와 조직특성의 변화도 적었다. 고온고압반응기 multi-cyclone 실험결과 ZAC C 탈황제는 이론 황흡수력의 50% 이상을 유지하였고, 공기를 사용한 500℃의 재생반응이 원활하고 완전히 이루어졌고, 황산염생성과 같은 부반응이 없었다. Two desulfurization-regeneration experiments for a spray-dried zinc-based sorbent(ZAC C) were performed at 500℃ and 5 atm in a fluidized-bed reactor(ID 0.097㎜) facility. The H_S concentration after each desulfurization run was maintained below 10 ppmv from a simulated coal gas of 1% H_2S. The estimated sulfur absorption capacities of ZAC C sorbent were 11.1, 10.9, 11.1, 11.1, 10.9, 10.5 g S/100g sorbent, and the sorption capacity of sorbent was maintained in spite of six times sorption experiments. The maximum SO_2 concentration in regeneration effluent gas agreed with a stoichiometric value of 500℃(ca. 14vol%). In regeneration run, the peak temperature of sorbent bed in the reactor reached up to 750 due to the vigorous exothermicity of regeneration reaction with neat air. While entrainment rate for 70h continuous run in fluidized-bed reactor is 1.07%, the size and the textural properties of ZAC C sorbent also show a little change. Multi-cycle tests in fluidized-bed show that ZAC C sorbent maintains over 50% of its theoretical sorption capacity during 70h run and regeneration reaction undergoes smoothly and completely without side reactions such as sulfate formation.

내시경역행성담췌관조영술 후 발생한 종격동기종, 피하공기증, 긴장성 기흉 1예

조용건,이현승,권균홍,김자영,김봉진,김지연,배용목,박선자 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.4

However, Endoscopic retrograde cholangiopancreatography (ERCP) is still helpful procedure for the diagonosis of the pancreatobiliary disease and treatment through endoscopic sphinterectomy (EST) is relatively safe, these have possiblity of complications such as hemorrhage, infection, panceatitis, and perforation. ERCP related perforation was rarely reported in 0.3 to 1.1% of previous study, but most serious complication. A report of Pneumomediastinum, Tension Pneumothorax complicating perforation after ERCP and EST is very uncommon. In our hospital, we experienced case of pneumomediastinum, subcutaneous emphysema, and tension pneumothorax after ERCP and EST, and the patient (a 58 years old female with suspicious common bile duct stone) was treated successfully with conservative treatment.

제주연안 갯녹음(백화) 지역의 해수에 분포하는 세균군의 분자생물학적 분석

강봉조,김미란,윤병준,이동헌,오덕철,강형일 濟州大學校 基礎科學硏究所 2002 基礎科學硏究 Vol.15 No.2

본 연구에서는 갯녹음(백화)현상이 세균생태계와 어떤 관련이 있는지에 대한 기초자료 및 정보를 얻기 위하여 갯녹음 현상이 일어난 제주도 성산과 강정지역 연안의 해수에 존재하는 세균군을 16S rRNA 증폭기법을 이용하여 조사하였다. 강정지역에서는 Alcanivorax, Paracoccus, Damselae, Pseudomonas, Rhodovulum, Silicibacter, Sulfitobacter, Roseobacter 등 다양한 종류의 세균이 분포되어 있었으며, Alcanivorax가 20%의 빈도로 가장 많이 나타났다. 반면, 성산 지역에서는 Pseudomonas속 균주가 우점종으로서 존재하였으며, Pseudomonas tolaasii(혹은 Pseudomonas corrugata)와 유연관계가 가까운 세균은 44%, Pseudomonas mandeli와 가까운 세균이 24%, Verrucomicrobiales와 가까운 세균은 4%, 기타 동정되지 않은 세균은 세 group으로 구분되었으며, 각각 8%, 8%, 12%를 차지하여, 두 곳에 분포되어 있는 세균군상이 상당한 차이점이 있음을 확인하였다. 갯녹음 지역인 강정과 성산 해수의 8월(표품 채집시기)의 수온은 27℃-27.5℃, 염분의 농도는 30.24-30.60%, pH는 8.23-8.36, 용존산소량(DO)은 각각 7.20-7.28로, 두 지역에서 매우 비슷한 것으로 조사된 바 있는데, 이는 수온이나 염분의 농도, 또는 pH보다는 다른 원인에 의하여 두 갯녹음 지역에 분포하는 세균군의 차이를 가져왔음을 제시해 주었다. In this study, the bacterial communities distributed in sea water of the whitening areas of Gangjeong and Seongsan, Jeju-do have been analyzed using the PCR amplification of 16S rRNA to obtain fundamental data and information on relationship of the whitening phenomenon and microbial ecosystem. In Gangjeong, diverse bacteria such as Alcanivorax, Paracoccus, Damselae, Pseudomonas, Rhodovulum, Silicibacier, Sulfitobacter, and Roseobacier have been found, and Alcanivorax was the most abundant clone. The most abundant clone from Seongsan was Pseudoinonas, of which Pseudomonastolaasii and Pseudonionas mandeli were most abundantly occurred in the frequency of approx 44% and 24%, respectively. Approx 4% of the bacterial clones closest to firruconiicrobiales and other unidentified clones were also found in Seongsan, suggesting there is a great discrepancy between bacterial communities from the whitening areas of Seongsan and Gangjeong. The mean tem- perature, chlorine concentration, pH, and dissolved oxygen (DO) of the sea water of Gangjeong and Seongsan in August of 2001 (sampling period) was 27℃-27.5℃, 30.24-30.60%, pH 8.23-8.36,7.20-7.28 ㎎/ℓ, suggesting other environmental factors except for the factors mentioned above might result in difference of bacterial communities distributed in both areas.

불균일 Winkler 탄성 기초위에 놓인 보의 자유진동과 안정성

최봉문,윤영식,윤충섭,류봉조 建陽大學校 1999 建陽論叢 Vol.- No.7

The paper deals with free vibration and stability analysis of a uniform Euler-Bernoulli beam resting on non-uniform Winkler elastic foundation. governing equations for the system are derived by using energy expressions. Solutions are approximately and numerically calculated by means of the finite element formulation. The solutions in the present paper are compared with other available ones without axial force. Finally, stability for cantilever and simply supported beams under a pure axial force is investigated.

아접선력을 받는 보의 동적안정성에 미치는 고유치 감도해석

류봉조,최상경 한밭대학교 산업과학기술연구소 2001 논문집 Vol.5 No.-

This paper deals with the eigenvalue sensitivity of a finite element formulation on vibration and dynamic stability of an elastically restrained cantilevered beam under subtangential forces. Governing equations are derived by energy expressions using extended Hamilton's principle. In order to more quickly and efficiently obtain the critical subtangential force for a given system, a technique which utilizes the eigenvalue sensitivity with respect to the system parameter is introduced. More accurate results are obtained for both variations in the spring position, spring stiffness, as well as the subtangential parameter.

퍼지큐잉모델을 이용한 단일서버의 성능평가

추봉조 김천대학교 2003 김천대학교 논문집 Vol.24 No.-

In this paper, we propose the performance evaluation of single server and system capacity K using Fuzzy M/M/1/K queueing model which has derived by appling the fuzzy set theory. When the arriving rate of input job and the servicing rate of a server are represented as the linguistic attributes, the system analysis can be performed by using this model. The major evaluation measures of system such as the average number of jobs existing in the system, the average number of jobs into system, and the average spending time of job in system etc. are derived for the eval- uation of system. Computer simulation was performed for verifying the effectiveness of these result equations. In which the various fuzzy arriv- ing rates and fuzzy servicing rates according to varying the system capacity K were given for the system evaluation.