권역단위 농촌지역개발사업의 주민역량 측정을 위한 설문도구개발

리신호 ( Shin Ho Rhee ),민흥기 ( Heung Gi Min ),윤성수 ( Sung Soo Yoon ),정남수 ( Nam Su Jung ),장우석 ( Woo Seok Chang ) 한국농촌계획학회 2014 농촌계획 Vol.20 No.4

The purpose of this study was to develop survey tools for diagnosis of capacity levels in business promotion of rural residents when performing a rural development project of a regional unit. The cases of previous studies were analyzed to select community capacity indicators related to a rural development project. Five indicators were derived : social capital, consciousness of participation, community spirit, and leadership. Based on the five indicators, measurement items of various capacities were selected and 54 survey items were selected through evaluation of experts twice. The pilot tests were conducted and targeted at Jeonnam song ho-jung village and Gyeongnam Haegeumgang village to identify derived survey items. In addition, descriptive statistic analysis and reliability analysis were conducted. As a result, survey items were corrected by reducing 10 items of the total 54 items. This results showed that using this tool could help us understand capacity levels of rural residents.

Intracavitary Radiation Therapy for Recurrent Cystic Brain Tumors with Holmium-166-Chico : A Pilot Study

Ha, Eun Jin,Gwak, Ho-Shin,Rhee, Chang Hun,Youn, Sang Min,Choi, Chang-Woon,Cheon, Gi Jeong The Korean Neurosurgical Society 2013 Journal of Korean neurosurgical society Vol.54 No.3

Objective : Intracavitary injection of beta-emitting radiation source for control of cystic tumors has been tried with a benefit of localized internal radiation. The authors treated cystic brain tumor patients with Holmium-166-chitosan complex (Ho-166-chico), composed of a beta-emitting radionuclide Holmium-166 and biodegradable chit polymer, and evaluated the safety and effective measurement for response. Methods : Twenty-two patients with recurrent cystic brain tumor and/or located in a deep or eloquent area were enrolled in this pilot study. The cyst volume and wall thickness were determined on CT or MRI to assess radiological response. The activity of Ho-166-chico injected via Ommaya reservoir was prescribed to be 10-25 Gy to the cyst wall in a depth of 4 mm. Results : There was neither complications related to systemic absorption nor leakage of Ho-166-chico in all 22 patients. But, two cases of oculomotor paresis were observed in patients with recurrent craniopharyngioma. Radiological response was seen in 14 of 20 available follow-up images (70%). Seven patients of 'evident' radiological response experienced more than 25% decrease of both cyst volume and wall thickness. Another 7 patients with 'suggestive' response showed decrease of cyst volume without definitive change of the wall thickness or vice versa. All patients with benign tumors or low grade gliomas experienced symptomatic improvement. Conclusion : Ho-166-chico intracavitary radiation therapy for cystic tumor is a safe method of palliation without serious complications. The determination of both minimal effective dosage and time interval of repeated injection through phase 1 trial could improve the results in the future.

중성 K중간자의 CP비보존

李聖瑞,柳新鎬 公州大學校 基礎科學硏究所 1994 自然科學硏究 Vol.3 No.-

top quark의 질량을 추정하기 위해 본 연구에서는 광범위하게 중성 K중간자계의 현상을 조사 연구하였다. top quark의 질량이 Frizsch의 질량행렬과 Sctech의 질량행렬로 예언된 상한값을 넘을 수 있다는 실험 결과에 비추어 top quark의 큰 값을 수용할 수 있는 B.L. 질량행렬과 G.J. 질량행렬을 사용하였다. 또한 KL-KS 질량차 Δm과 CP 비보존 매개변수 |ε|을 구속조건으로 사용하였다. G.J. 질량행렬로 얻은 혼합행렬을 실험자료와 비교하여 117Gev∼178Gev의 범위에 top quark의 질량이 존재한다는 것을 얻었다. 중성 Kaon계에서 Δm과 |ε|의 값의 계산에서 C.K.M. 행렬과 이론적 투입 매개변수에 대한 합리적 값을 사용하여 구간 mt의 하한은 185Gev이며, G.J. 질량행렬로 얻은 혼합행렬과 투입 parameter를 써서 구한 mt의 하한은 180Gev였다. B.L. 질량행렬로 얻은 혼합행렬을 사용할 때 mt의 하한의 범위는 220∼260Gev이다. We have investigated the phenomenology of the neutral kaon system in a comprehensive way in order to estimate the top quark mass. In the light of experimental indications that the top quark mass, mt may exceed the upper bound predictioned by the Fritzsch ansatz and Stecch's ansatz for quark mass matrices, we have used B. L. mass matrix and G. J. mass matrix which could accommodate large value of mt. And also we have used the KL-KS mass difference Δm and the CP non-conservation parameters |ε|, as constraints to be satisfied. Comparing the C. K. M. matrix by G. J. ansatz and experimental data, we have obtained mt to be in the range 117Gev - 178Gev. In the neutral kaon system C. K. M. matrix and reasonable values for the theoretical parameters suggest the lower bound of top quark mass might be about 185GeV. And also we have obtained the lower bound of mt to be about 180GeV through the mixing matrix by G. J. ansatz and values of input parameters. When we used the Hiking matrix made by B. L. ansatz we have obtained the lower bound of mt to be in the range 220GeV-260GeV.

수압보증시험시의 음향방출에 의한 복합재 연소관의 파괴거동 예측

이상호,김호철,오치환,송성진,정현조,임수용 韓國非破壞檢査學會 1998 한국비파괴검사학회지 Vol.18 No.2

섬유강화 복합제 연고관은 복합재료의 사용, 필라멘트 와인딩 및 경화공정 등으로 인하여 제작 중 다양한 결함이 발생할 수 있으며, 또한 사용 도중에도 예기치 않은 손상을 받아 기계적 성질이 저하될 수 있다. 따라서 제작 완료된 연소관의 품질 보증을 위해 수압보증시험이 사용되고 있으나 이를 위해 가한 수압이 오히려 연소관에 예기치 않은 손상을 가하여 실제 사용시 그 성능을 저하시키는 요인으로 작용하는 경우도 있다. 이러한 문제를 해결하기 위해 본 연구에서는 수압보증시험시의 음향방축을 감지하여, 그 신호의 특성으로부터 복합제 연소관의 파손 거동을 예측하는 체계적인 기법의 개발을 시도하였다. 음향방출을 이용하여 연소관에 발생한 손상의 개략적 위치를 결정할 수 있었으며, 또한 파괴모드의 식별도 가능하였다. 다만, 시료의 부족으로 최종파열압력의 변화와 충격손상의 영향에 대한 신뢰성있는 분석은 불가능하였다. Prediction of failure behavior in filament-wound composite motor cases is one of the important issues for their reliable application. Acoustic emission during hydroproof testing of the cases is used to solve this problem. Based on the acoustic emission behavior, failure sites can be located successfully. The identification of failure modes is also possible using the distribution of acoustic emission amplitude. Due to the limitation in the number of samples, it is not possible to predict the final burst pressure of motor cases and the effect of impact damage on the final burst pressure.

輿論과 政治發展

李商鎬 건국대학교 1982 政法論叢 Vol.17 No.1

SWS 490A 강의 용접 열영향부 음향방출 특성에 대한 연구(1)

이장규,우창기,박성완,윤종희,조진호,김봉각,구영덕 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.4

The object of this study is to investigate the effect of compounded welding through the AE(Acoustic Emission) characteristics for weld HAZ(Heat Affected Zone) under the static tensile test. This study was carried out an SWS 490A, high tension steel for electric shield metal arc welding(SMAW), CO₂gas arc welding and TIG welding. Data displays are based on the measured parameters of the AE signals, along with environmental variables such as time and load. The accumulated AE event curve of HAZ definitely have the point of inflection subject to tensile test. The results of the tensile test of HAZ come out electric shield arc welding > CO₂ gas arc welding >TIG welding in case of single welding, but generally the tensile test of HAZ come out electric shield arc welding > TIG welding > CO₂ gas arc welding. These history plots give us useful and powerful information to analyze the results of material evaluation testing.

로켓 연소관 조립체의 음향방출 신호해석

이상호,황태경,문순일 한국비파괴검사학회 2003 한국비파괴검사학회지 Vol.23 No.5

본 연구에서는 금속재 연소관내부에 단열고무/내열복합재로 구성된 연소관 조립체의 품질평가에 적용 가능한 음향방출 비파괴 시험 평가 기법을 정립하기 위하여 그간 수행되었던 시험결과를 종합하여 실제 생산에 적용가능한 평가 기법을 정립하였다. 유한요소 code를 사용하여 연소관 조립체 구조 해석한 결과를 바탕으로 내열 복합재에 절개선이 있는 연소관 표면의 스트레인과 절개선이 없는 연소관 표면의 스트레인값을 비교하였다. 해석 결과는 공압시험 중 연소관 표면에 부착된 스트레인값과 음향방출센서로부터 측정된 신호와 비교함으로써 연소관과 단열고무 접착성이 확인되었다. 음향방출법을 이용하여 금속재 연소관과 단열고무와의 접착성을 평가하는 방법으로서 실제 생산과정에 적용 가능함을 확인하였다. To establish nondestructive test method for rocket motor assembly with rubber and aerospace composite materials, practicable quality control acoustic emission test method is presented. Structural analysis for motor assembly is performed by ABAQUS code and analysis output result is confirmed by strain gage and AE data. Various specimens were tested and analyzed using strain gage and acoustic emission data. The hit rate of acoustic emission was closely related with case/rubber debonding. This report also describes practicable acoustic emission nondestructive method for evaluating motor case assembly quality assurance in the industrial field.

음향방출 신호를 이용한 SWS 490A 고장력강의 접합성 평가에 대한 실험적 연구

이장규,우창기,윤종희,조진호,조대희,박성완,김봉각,구영덕 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

The object of this study is to investigate the effect of joinability by using acoustic emission (AE) signals and doing a pattern recognition for weld heat affected zone (HAZ) in tensile testing. This study was carried out an SWS 490A high tension steel for electric shielded metal arc welding (SMAW), CO₂ gas arc welding and TIG welding. And correspondingly, the root openings are 3, 4 and 2.8㎜. The results of the tensile test of weld HAZ come out electric shield arc welding > CO₂ gas arc welding > TIG welding in case of single welding. It is believed that this is a phenomenon where difference of its root opening or base metal thickness. Also, the technique of AE is ideally suited to study variables which control time and stress dependent fracture or damage process in metallic materials.

Helicobacter pylori 편모 유전자의 클로닝 및 염기서열 분석

이광호,이우곤,조명제,도영미,백승철,강경희,박필성,이상룡 경상대학교 유전공학연구소 1993 遺傳工學硏究所報 Vol.12 No.-

A λgt11 expression libary of H. pylori DNA in E. coli Y1090 was screened with flagellin-specific rabbit antiserum for molecular cloning of the flagellin gene of H. pylori. A positive clone, λHPF4, was obtained and the recombinant antigen expressed from λHPF4 was a fusion protein with the molecular weight of 168kd. Sequence analysis of antigen-encoding DNA showed that an open reading frame composed of 1,536 nucleotides encodes a polypepride with a oredicted molecular size of 54kd. This open reading frame did not show the homology with flaA gene encoding 56kd protein of H. pylori and was confirmed as a unique sequence through homoligy searching. Therefore, the cloned antigen is supposed to be the carboxy-terminal region of the other flagellin protein of H. pylori, flaB, with the molecular weight of 58kd.

한우번식기반의 안정화방안에 관한 연구

이상영,박민수,정호근 韓國農業政策學會 1999 농업경영정책연구 Vol.26 No.2