전송율 향상을 위한 다단계 상호연결망

신용태,이철희,조민수 崇實大學校 生産技術硏究所 1996 論文集 Vol.26 No.1

This paper proposed two Multi-statge Interconnection Network(MIN) that had multiple outlet to improve throughput. These proposed MINS were made of Clos MIN, well known Non-blocking MIN. These proposed MINs were called ECFS(Expanded Clos Switch Fabric) adn TCSF(Tandem Clos Switch Fabric). ECFS was consist of expanded number of switchs for multiple oulet. TCSF was consist of serial Clos MIN for multiple outlet. Performance evaluation of these proposed MINs was calculated arrival probability of packet through the MIN. In teh result, these proposed MINs with multiple outlet had higher throughput than existed MIN with single outlet. We know the fact that as the outlet of MIN increase, throughput of MIN increase.

Involvement of calcium-mediated apoptotic signals in H₂O₂-induced MIN6N8a cell death

Choi, Sung-E,Min, Se-Hee,Shin, Ha-Chul,Kim, Hyo-Eun,Jung, Min Whan,Kang, Yup Elsevier 2006 european journal of pharmacology Vol.547 No.1

<P><B>Abstract</B></P><P>Reactive oxygen species are believed to be the central mediators of beta-cell destruction that leads to type 1 and 2 diabetes, and calcium has been reported to be an important mediator of beta cell death. In the present study, the authors investigated whether Ca<SUP>2+</SUP> plays a role in hydrogen peroxide (H<SUB>2</SUB>O<SUB>2</SUB>)-induced MIN6N8a mouse beta cell death. Treatment with low concentration H<SUB>2</SUB>O<SUB>2</SUB> (50?μM) was found to be sufficient to reduce MIN6N8a cell viability by 55%, largely via apoptosis. However, this H<SUB>2</SUB>O<SUB>2</SUB>-induced cell death was near completely blocked by pretreatment with BAPTA/AM (5?μM), a chelator of intracellular Ca<SUP>2+</SUP>. Moreover, the intracellular calcium store channel blockers, such as, xestospongin c and ryanodine, significant protected cells from 50?μM H<SUB>2</SUB>O<SUB>2</SUB>-induced cell death and under extracellular Ca<SUP>2+</SUP>-free conditions, 50?μM H<SUB>2</SUB>O<SUB>2</SUB> elicited transient [Ca<SUP>2+</SUP>]<SUB>i</SUB> increases. In addition, pharmacologic inhibitors of calpain, calcineurin, and calcium/calmodulin-dependent protein kinase II were found to have a protective effect on H<SUB>2</SUB>O<SUB>2</SUB>-induced death. Moreover, H<SUB>2</SUB>O<SUB>2</SUB>-induced apoptotic signals, such as c-JUN N-terminal kinase activation, cytochrome <I>c</I> release, caspase 3 activation, and poly (ADP-ribose) polymerase cleavage were all down-regulated by the intracellular Ca<SUP>2+</SUP> chelation. These findings show that [Ca<SUP>2+</SUP>]<SUB>i</SUB> elevation, possibly due to release from intracellular calcium stores and the subsequent activation of Ca<SUP>2+</SUP>-mediated apoptotic signals, critically mediates low concentration H<SUB>2</SUB>O<SUB>2</SUB>-induced MIN6N8a cell death. These findings suggest that a breakdown of calcium homeostasis by low level of reactive oxygen species may be involved in beta cell destruction during diabetes development.</P>

한국무속의 '신병'에 대한 진단분류연구

서동혁,이부영,신민섭,유희철 大韓神經精神醫學會 1996 신경정신의학 Vol.35 No.6

To study nosologically the Korean shaman's initiation sickness, 'Shin-Byong', the authors investigated 29 shamans with Symptom Check List-90-R(SCL-90-R) and questionnaire without visiting and interviewed 70 shamans using SCL-90-R, questionnaire and The Schedule for Affective Disorder and Schizophrenia-Lifetime(SADS-L). All shamans were located in Seoul. The results were as follows : 1) Among symptom groups of SCL-90-R, 'Shin-Byong' were associated with higher scores in depression, somatization, psychoticism and hostility group in descending order. 2) With DSM-Ⅲ-R classification, 87.2% of 'Shin-Byong' cases were mood disorders, Another 8.6% of cases were somatization and dissociative disorders and two disorders were related with dissociative phenomenon. Considering the diagnosis of manic episodes in this study, it seems to be a part of dissociative phenomenon, 'Shin-Byong' is the syndrome that is mainly composed of depression and disorders, which are related with dissociative phenomenon. 3) Shamans have teleologic thinking that 'Shin-Byong' is the phenomenon to receive spirits and diagnose intuitively. They think the main therapeutic method is recieving spirits, In conclusion, 'Shin-Byong' isn't a real disease entity but it is a shamanistic disease concept transformed during the shamanistic therapeutic process for depression patients with high dissociative tendency and dissociative disorder.

Casein micelle 의 조성에 관한 연구 : I. Micelle 크기 별에 따른 각 casein 의 구성비율 I. The relative amounts of individual caseins in the different casein micelles

김영교,신동철,전우민 한국낙농학회 1984 韓國酪農學會誌 Vol.6 No.1

本 實驗은 casein miceile의 크기에 따른 각종 casein의 構成成分을 究明하고자 超遠心分離機를 利用하여 casein micelle을 크기 別로 分類하고 DEAE-cellulose column chromatography를 이용하여 각 casein의 構成比率을 조사하였다. 그 結果를 要約하면 다음과 같다. 1. 脫脂乳를 100,000×g에서 각각 30分, 60分, 90分동안, 200,000×g에서 60分동안 遠心分離하였을 때 沈澱되는 casein micelle 量은 45.00%, 61.43%, 80.00% 및 95.00%였으며 沈澱되지 않는 serum casein量은 55.00%, 38.57%, 20.00% 및 5.00%였다. 2. 脫脂乳를 100,000×g에서 時間 差에 따라서 遠心分離하였을 때 각각 沈澱되는 casein micelle量은 10分間에는 全 casein量의 23.13%, 11∼30分間에는 30.26%, 31∼60分間에는 28.11%였으며, 60分問의 遠心分離에 의해서 沈澱되지 않는 serum casein은 17.79%였다. 3. 時問 差로 遠心分離하여 얻어진 casein micelle중 각 casein의 構成比率을 測定한 結果, α_s-casein, β-casein, κ-casein 및 γ-casein의 상대적인 量은 100,000×g, 10分의 pellet에서 각각 54%, 29%, 11% 및 6%였고, 100,000×g, 11∼30分의 pellet에서는 각각 54%, 28%, 13% 및 5%였고, 100,000×g, 31∼60分의 pellet에서는 각각 51%, 28%, 16% 및 5%로 나타났으며, serum casein은 44%, 29%, 19% 및 8%로 각각 나타났다. This experiment was carried out to study on the protein composition of casein micelles. Three micellar casein pellets and a serum casein were isolated at diferent time of ultracen trifugation. And the composition of individual caseins for the fractions was determined by DEAE-cellulose column chromatography. The results are summarized as follows: 1. When skimmilk was centrifuged for 30 min, 60 min and 90 min at 100,000g and for 60 min at 200,000g, the values for the sedimented casein micelles were 45.00%, 61.43%, 80.00% and 95.00% respectively and that of serum casein was 55.00%, 38.57%, 20.00% and 5.00% respectively. 2. When skimmilk was centrifuged for different time at 100,000g, the values for the sedimented casein micelles were 23.18% for 10 min.(pellet 1), 30.26% from 11 to 30 min.(pellet 2), 28.11% from 31 to 60 min.(pellet 3) and that of serum casein which was not sedimented at 60 min was 17.79% of the total casin. 3. The relative amounts of α_s-, β-, k- and γ-caseins in casein micelles obtained after different time of centrifugation were 54%, 29%, 11% and 8% in pellet 1, 54%, 28%, 13% and 5% in pellet 2, 51%, 28%, 16% and 5% in pellet 3,44%, 29%, 19% and 8% in serum casein respectively.

Cutting performance of tungsten carbide tools coated with diamond thin films after etching for various times

Kim, Jong Seok,Park, Yeong Min,Bae, Mun Ki,Kim, Chi Whan,Kim, Dae Weon,Shin, Dong Chul,Kim, Tae Gyu World Scientific Publishing Company 2018 Modern physics letters. B, Condensed matter physic Vol.32 No.20

<P>In this study, diamond thin films were deposited on tungsten carbide tools using surface-wave plasma-enhanced chemical vapor deposition (SWP-CVD). To eliminate the adverse effects of cobalt on the diamond deposition process, the cobalt was removed from the surface of the tools by etching with Murakami’s reagent for various times (30, 60, and 120 min). The cutting performance of the untreated and the diamond-coated WC tools was examined by performing cutting test on carbon fiber-reinforced plastic (CFRP). The results showed that all the diamond-coated tools exhibited great improvement on the durability and wear resistance compared to the uncoated one. In addition, the diamond-coated tool lift time is found to be proportional to the etching time. An increase more than twofold has been achieved when the etch time was increased from 30 min to 120 min.</P>

RSA 암호화 알고리즘의 구현에 관한 연구

신인철,이민섭,박창섭,김범식,우찬일,최춘수 단국대학교 1998 論文集 Vol.33 No.-

Recently, the information exchange through a communication network has been increased rapidly. When the sensitive information being sent or stored, the cryptographic technique can be employed in order to prevent it from being exposed or modified by the illegal third party. To implement public key encryption systems based on the integer factorization and the discrete logaritm problem, an efficient exponential arithmetic is mandatory due to large numbers involved. In this paper, the general analysis about the high­speed implementation of primality testing and exponentiations are investigated as well as implementing RSA public­key system. The public­key cryptosystem can be applied to any applications which need both the privacy and the authentication. Finally, suing the software package named MIRACL which provides the basic number theoretic routines for cryptographic software developers. we have implemented the RSA encryption and decryption with Blum­Goldwasser probabilistic algorithm under various key and message size.

서울시 도시산림의 식생구조 및 변동에 관한 연구

신수철,윤상욱,이민순 동국대학교 생명자원과학대학 연습림 2000 연습림논문집 Vol.- No.6

The total number of woody plants species appeared in the investgated area were 31 families 45 genus 79 species including 8 varieties and 1 fomular. Importance values(Ⅳ) of the tree species of forest area in Seoul, Quercus mongolica showed the highest Ⅳ and Robinia pseudoacacia, Prunus sargetii, Pinus densiflora, Quercus acutissima, Sorbus alniflora were dominant species at conopy layer. Importance values of major tree species in relation to topographic feature, Quercus mongolica was higher in northern aspect than in southern aspect and at valley topography was higher than at ridge topography while Robinia pseudoacacia showed higher in southern aspect than in northern aspect and at ridge topography was higher than at valley topography, and Pinus densiflora showed high Ⅳ at ridge topography of southern aspect. As the result of COA Ordination analysis for fifty three plots belong to twenty five survey site of forest area in Seoul were divided into four vegetation communities which were Quercus mongolica-Prunus sargetii community, Quercus mongolica community, Robinia pseudoacacia community, Quercus variabilis community. Shanon’s species diversity indicies range of each community was 1.3822∼1.1189, and Quercus monglica community showed the highest species diversity and Quercus monglica - Prunus sargetii community showd the lowest.

기질성 정신장애환자에서 불안과 우울

신석철,왕성근,강민희,신윤오 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2

Atuhors applied the self-rating anxiety scale(SAS) and the self-rating depression scale(SDS) devised by Zung to 95 psychiatric outpatients with organic mental disorder in order to investigate about anxiety and depression manifest in organic mental disorder and tried factor ananlysis using both test scores. 1. In SAS, 4 factors were extracted as paresthesia & facial flushing, fear & dizziness, palpitation & urinary frequency, and nervousness & fatigability. 2. In SDS, 4 factors were extracted as depressed affect & suicidal rumination, dissatisfaction & indecisiveness, fatigability & sleep distrubance, and emptiness & hopelessness.

급성 심근경색 초기에 도플러 심초음파를 이용한 좌심실 이완기 기능의 평가

신원용,김주성,김철현,이광희,최태명,현민수,김성구,권영주 순천향의학연구소;Soonchunhyang Medical Research Institute 2000 Journal of Soonchunhyang Medical Science Vol.6 No.1

Background : Congestive heart failure after acute myocardial infarction relate to left ventricular systolic sysfunction. Also, left ventricular diastolic function contribute to heart failure. The aims of this study were, firstly to characterize left ventricular diastolic function by transmitral flow velocity, and secondly to study the significance of Doppler measurements in relation to the development of heart failure in the early phase of myocardial infarction. Method : Pulsed Doppler echocardiography of transmitral flow was assessed in 34 patients with acute myocardial infarction. According to the Doppler transmitral flwo velocity profile, the study patients were assigned to the three groups: normal filling pattern (DT > 140ms, IVRT < 100ms), relaxation abnormality (DT > 140ms, IVRT ≥ 100ms), pseudonormal or restrictive pattern (DT ≤ 140ms). Also, on the basis of the presence of heart failure during first week of hospitalization, the patients were divided into two groups: patients with no sign of heart failure (Killip class Ⅰ) and heart failure (Killip class Ⅱ-Ⅳ). Results : Of the 34 patients studied, 10(29%) were normal filling pattern, 17(50%) abnormal relaxation and 7(21%) were restrictive patterns. The left ventricular ejection fraction(EF, 40 ±6%) of restrictive pattern was significantly lower than that of normal filling pattern of abnormal relaxation(p < 0.01). And, the IVRT, DT, E/A and left ventricular EF were reduced in patients with heart failure(14 patients) compared to no sign of heart failure(20 patients)(p<0.05). Of the patients with heart failure, IVRT and left ventricular EF were reduced in patients with DT≤140 ms compared to DT> 140ms(p=0.001). Conclusion : Left ventricular diastolic dysfunction is present early after onset of symptoms of acute myocardial infarction. Assessment of left ventricular diastolic function complements measurements of systolic function in the evaluation of cardiac function. DT, IVRT, E/A and left ventricular EF are useful predictors for development of congestive heart failure following acute myocardial infarction.

DC 글로우 방전 플라즈마에 의한 Acetonitrile Polymer의 합성

신철민,김성호,남성만 순천향대학교 기초과학연구소 1997 순천향자연과학연구 논문집 Vol.3 No.1

The Acetonitrile was polymerized in the condition of DC glow discharge plasma. The reaction products were identified using GC-MS and MALDI-TOF(matrix assisted laser desorption and ionization-time of flight) MS.