연구보문 : 자연과학 ; 황산처리에 의한 불투수성 황근 종자의 발아촉진에 관한 연구

서상흠 ( Sang Heum Seo ),박민우 ( Min Woo Park ),장미하 ( Mi Ha Chang ),장일웅 ( Il Ung Jang ),심상인 ( Sang In Shim ),나영왕 ( Young Wang Na ),김수영 ( Soo Young Kim ),김석현 ( Seok Hyeon Kim ) 한국국제농업개발학회 2012 韓國國際農業開發學會誌 Vol.24 No.3

The reason of poor germination rate of hamabo mallow seed was speculated using TZ test to determine the viability of seed. Seeds showed high viability via TZ test were not germinated well. The quiescent seeds did not imbibed properly due to the hard seed coat and did not show further processes required for germination. Several well-known treatments for seed coat loosening and water uptake into seed were applied and compared for their efficiency. Stratification, hot water treatment, seed coat scarification, wet-cold treatment were revealed as less effective for improving germination although those treatments were common method for breaking dormant seed. Chemical scarification with sulfuric acid, however, effectively increased germinability and promptness index of hamabo mallow seeds. Optimal time for sulfuric acid treatment was 20 min. Seeds treated for 20 min showed improved germination percentage, germination speed, and promptness index of 80%, 13, and 1969 at 30 days after imbibition, respectively, in petri dish experiment. The values were greater than control seeds showed low values (12%, 1, and 183, respectively). The similar tendency was observed in the pot experiment that sulfuric acid treated seed were sown in artificially mixed soil (loamy soil:peatmoss:sand:compost = 5:2:2:1) and placed in greenhouse. Ultrastructure analysis of chemically scarified seed with sulfuric acid for 20 min by scanning electron microscopy did not show any noticeable changes in seed coat hardness and water uptake via hilum. But the only change after sulfuric acid treatment was removal of hilum cap that close the hilum and hider imbibition. Therefore, subsequent experiment was conducted to know the relationship between removal of hilum cap and facilitated imbibition by sulfuric acid treatment and whether the hilum cap removal directly influenced to the opening of micropyle. Water uptake velocity of seed treated for 20 min in concentrated sulfuric acid for was greater than control seed. This result implies that the crucial effect of sulfuric acid treatment is the removal of hilum cap that increase water uptake via micropyle in hamabo mallow.

산업용 이차전지의 열화진단에 관한 연구

장대경,황호석,박민기 서울産業大學校 2005 논문집 Vol.54 No.3

This paper proposes a new degradation diagnosis method of secondary battery in order to improve a battery economy. In the proposed method, a bad cell is detected by the measurement of DC internal resistance and the battery capacity is estimated by the electric discharge test in a short period of time, which can be used to determine the time to replace the battery. Through the computer simulation and actual experimentation, the proposed method's validity is confirmed by comparing and analyzing the performance. As a result, we show that it is possible to estimate the accurate capacity of secondary battery in a short space of time.

시스템 부하를 고려한 전력제어 방식에 관한 연구

장민석,홍인기 경희-다반 ASIC 설계교육센터 2006 경희-다반 ASIC센터 논문집 Vol.7 No.-

기존 DS-CDMA 시스템에서의 전력제어는, 내부루프의 목표값을 외부루프에서 FER 을 고려하여 조절하였다. 그러나 이러한 방법은 간섭의 영향을 고려하지 못 하는 단점이 있다. 본 논문에서는 전력제어의 목표 SINR값이 시스템 부하에 의해 결정되는 새로운 방식을 제안하고, 목표 SINR 간과 시스템 부하값에 따른 Outage 확률을 분석하였다. 시스템의 부하가 적을 때는, 높은 목표 SINR 값에서 낮은 Outage를 보이는 반면에, 시스템의 부하가 많을 때는 목표 SINR 값을 낮게 설정함으로써 더 많은 시스템 용량을 얻을 수 있었다.

경로도메인에 기반한 신뢰성있는 시험데이타 선택기준

장민석 群山大學校 情報通信技術硏究所 1997 情報通信技術硏究論文集 Vol.1 No.-

For the purpose of reliable program testing, there have been recently a variety of test data selection strategies in the field of data part testing. Not only, however, it is doubtful how reliably the test data derived from them is able to detect program faults, but also in many cases they are only theoretical and the concrete testing methodology is not suggested. It is because they do not analyze types of faults and the effects of faults on program in a systematical manner. In this paper, the more reliable domain-based test data selection strategy is proposed through using fault detecting probability or reliability.

충남 서북부지역 여성의 질세포진 검사에 대한 임상적 고찰

이석민,선우재근,장경택,서수형,김민관,배동한 순천향의학연구소 1996 Journal of Soonchunhyang Medical Science Vol.2 No.2

Pap smear were performed to 30,294 women living in the north-west of Chung-nam. The result are summarized below 1. Positive vaginal cytology was 1.09 percent. 2. 72 percents women in their 30's and 40's experienced vaginal cytology. 3. Vaginal cytology was performed at a decreasing rate as age increases. 4. Positive cytology rate is 2.42% higher than average for elderly women over the age of 65. The present date indicates that pap smear is being widely recognized to be important but they needs to be continued advocacy for pap smear.

3'-Methyl-4-dimethylaminoazobenzene이 백서의 정상 및 재생간의 EGF Receptor 변동에 미치는 영향

홍장희,허강민,석정호,이재흔 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.1

To study the changes of EGF receptors in the rat liver regeneration and hepatic carcinogenesis, ^125I-EGF binding sites were measured in the regenerated liver cell membrane after partial hepatectomy of normal rat and 3-methyl-4-dimethylaminoazobenzene treated rat. 1. EGF binding sites (Bmax) in the normal rat liver cell membrane were 553.8fmole/mg protein and were markedly decreased at the 1st day after partial hepatectomy. These sites were increased at the 3rd day(Bmax-161.0fmole/mg protein) and were 29% of the normal liver EGF binding sites. 2. EGF binding sites (Bmax) in the normal cell membrane of the 3-methyl-4-dimethylaminoazobenzene-treated rat, were 72.8fmole/mg protein and were significantly less than those in the normal rat live cell membrane. At the 1st day after partial hepatectomy, EGF binding sites were markedly decreased and increased at the 3rd day (Bmax=155.8fmole/mg protein). 3. Kd values in EGF receptor binding were not much altered in both liver cell membranes of the normal rat and the 3-methyl-4-dimethylaminoazobenzene treated rat. From these result, it is suggested that decreased EGF binding sites in the liver cell membrane of regenerating rat liver and 3-methyl-4-dimethylaminoazobenzene treated rat may be due to the alteration of EGF receptor number.

Prevotella nigrescens의 용혈특성에 관한 연구

곽주석,장훈상,장석우,이수종,유용욱,민경산 大韓齒科保存學會 2005 Restorative Dentistry & Endodontics Vol.30 No.4

세균의 용혈활성은 세균이 숙주 내에서 생존하기 위해 필요한 철을 획득하기위한 특성이며 기능면에서 볼 때 숙주에 대한 중요한 독력인자로 간주될 수 있다. 본 연구에서는 괴사치수 및 치근단 치주염으로 진단된 환자의 근관에서 분리한 Prevotella nigrescens의 용혈활성을 다양한 조건 하에서 측정하여 그 특성을 규명하는 것을 목적으로 한다. 1. 임상에서 분리한 P. nigrescers와 표준균주인 P. nigrescers ATCC 33563에서 모두 용혈활성이 나타났다. 2. 사람, 면양 및 말 세 가지 종에 대해 용혈활성을 비교한 결과 사람의 적혈구에서 가장 강한 용혈활성을 나타내었다. 3. 용혈소 억제제인 NaN₃와 dithiothreitol (DTT)는 농도의존적으로 P.nigrescers의 용혈활성을 감소시켰다 (p<0.05). 4. P. nigrescers가 최대 용혈활성을 나타내는 최적의 pH는 4이었으며, 50℃이하의 온도에서는 용혈활성을 보였으나 95℃에서 급격히 감소하였다. 5.배양조건에 따른 P. nigrescens의 용혈활성을비교한 결과 10% CO₂배양기에 배양한 경우혐기성 조건에서 배양한 것보다 더 높은 용혈활성을 보였다. Hemolytic property is a specific feature of bacteria to obtain iron which is essential for its survival in host tissues. Therefore, it is thought to be one of several factors of virulence. The purpose of this study was to investigate the hemolytic properties of Prevotella nigrescens isolated from the teeth diagnosed as pulp necrosis and apical periodontitis under the presence of hemolysin inhibitors such as NaN3 and dithiothreitol, heat, various pH and cultural conditions. The results were as follows; 1. Clinically isolated P. nigrescens strains and standard P. nigrscens ATCC 33563 showed hemolytic activity. 2. P. nigrescens showed higher hemolytic activity against human erythrocytes than sheep or horse erythrocytes. 3. NaN₃ and dithiothreitol (DTT) reduced the hemolytic activity of P. nigrescens in a dose dependent manner (p<0.05). 4. Optimal pH for the maximum hemolytic activity of P. nigrescens was 4.0 and the hemolysin was stable under the 50℃, but the hemolytic activity was significantly decreased at 95℃. 5. P. nigrescens cultured in 10% CO₂ condition showed higher hemolytic activity than the bacteria cultured in the anaerobic condition.[J Kor Acad Cons Dent 30(4):335-343,2005]

정신간호조무사 양성소 교육과정 전후의 정신질환에 대한 태도조사

최석민,장경준 大韓神經精神醫學會 1996 신경정신의학 Vol.35 No.5

이 연구는 정신질환에 대한 태도 변화가 적절한 교육에 의하여 변화할 수 있다는 관점에서, 정신질환자 치료에 일익을 담당하게 정신간호조무사를 양성하는 국립서울정신병원 부설 정신 간호조무사 양성소의 학생을 대상으로 정신질환에 대한 태도 조사를 하여, 정신과 교육이 정신질환에 대한 태도에 미치는 영향을 보았다, 연구 방법은 1993년과 1994년에 양성소 교육을 받고 전과정을 수료한 39명을 대상으로, 정신질환에 대한 태도를 묻는 설문지를 사용하여 정신과 교육전, 후의 정신질환에 대한 태도의 변화를 보았으며, 그 결과는 다음과 같다. 먼저 양성소 교육이 정신질한에 대한 태도에 미친 영향을 보면 다음과 같다. 1) 정신병 환자에 대한 개념 및 태도는 긍정적인 방향으로 변하였다(p<0.05). 2) 정신병원에 입원한 환자에 대한 치료 전망, 개방병동에 대한 태도의 변화는 부정적인 방향으로 변화하였다(p<0.05). 3) 나머지 신경증에 대한 개념, 정신질환에 대한 부정적 편견, 정신질환의 치료 예후에 대한 태도, 입원치료와 가정내 보호에 대한 태도, 정신병동의 기능에 대한 태도는 통계적으로 유의한 수준의 변화가 없었다. 이 연구의 조사 대상군의 특성을 알아보기 위해 동일한 설문을 사용하여 조사한 일반인 군, 의과 대학생 군과 비교해 보면 다음과 같은 결과를 얻었다. 1) 이 연구의 교육전 대상군은 정신과 실습을 받지 않은 의과대학생군과 정신질환에 대한 태도를 묻는전체 문항에서 통계적으로 유의한 차이를 보이지 않았다. 2) 이 연구의 교육적 대상군은 일반인보다 신경증에 대한 개념, 정신질환의 치료 예후에 대한 태도, 정신병원에 입원되어 있는 환자의 치료전망에 대한 태도를 묻는 문항에서 일반인보다 부정적으로 대답하였다. Objective : This study was designed to evaluate the effect of the psychiatric nursing assistant education done at Seoul National Psychiatric Assistant School on the attitude toward mental illness. Methods : The subjects were 39 graduates from Seoul National Psychiatric Assistant School, during 1993- 1994. They were assessed during pre- and post-education periods with Scale for Mental Health Attitude(Star 1952). Chi-square test was used for statistical analysis. Results : 1) Statistically significant changes were shown in concepts and attitudes toward mentally ill patients, therapeutic prospect to inpatient, and attitude toward open ward (p<0.05). 2) Statistically significant changes were not shown in concepts of neurosis, negativistic bias toward mental illness, therapeutic prognosis of mental illness, attitude toward inpatient treatment and care in home, and attitude toward function of psychiatric ward. Conclusion : We conclude that psychiatric nursing assistant education needs further improvement.

통신프로토콜의 적합성시험열 생성을 위한 경로 탐색 방법

황익순,장민석,이상배,이재용 延世大學校 電波通信共同硏究所 1996 電波通信論文誌 Vol.2 No.1

본 논문에서는 적합성 시험에서 EFSM(Extend Finite State Machine) 모델에 대한 데이타부분 시험열을 효율적으로 생성시켜 주는 탐색 방법에 대해 제안하였다. 이 탐색 방법에서는 depth-first search와 같은 기존의 탐색 방법과는 달리 탐색 초기에 다양한 경로가 찾아진다. 이미 제안된 시험열 생성 방법인 데이타 값을 바탕으로 하여 시험열을 생성하는 방법에서 이 탐색 방법을 이용하였을 경우 기존의 탐색방법을 이용하는 것보다 효율적으로 시험열을 생성할 수 있다. 본 논문에서는 Inres 프로토콜에 이 탐색 방법과 기존의 탐색 방법인 depth-first search를 각각 적용하여 시험열을 생성, 비교하여 보았으며, 제안된 탐색 방법을 이용하면 같은 시험 범주를 가지면서도 짧은 길이를 갖는 시험열을 효율적으로 생성할 수 있음을 알 수 있다. In this paper we proposed a searching algorithm for generating test cases, which can test data part of EFSM model in conformance test. In a different way to existing algorithm like depth-first search algorithm, this one can find various paths in the early stage of searching. When it is used in readily proposed test case generation method which is based on the value of variables and parameters it can generate test cases efficiently than in the case of depth-first search algorithm being used. We generated test cases for Inres protocol using each of proposed and depth-first search algorithm, and compared these two methods. proposed algorithm can generate much shorter test sequences efficiently than existing one.

Extened-C 컴파일러의 개발 및 분석

송진국,장성민 진주산업대학교 2000 산업과학기술연구소보 Vol.- No.7

This paper describes the development of hcc, an extended-C language compiler, In this paper, we emphasize the importance of an object-oriented programming language and the code optimization techniques suitable for RISCs. The main objectives are support of Hangul, development of a C++ preprocessor, register allocation and optimization suitable for RISCs, design of an intermediate language and its interpreter, and development of a C compiler. In this paper, we describe ways in which C++ program is translated to machine code through hcc. We also present development of the hcc, and compare its performance with other systems.