JINI를 기반으로 한 분산환경에서의 원격 어플리케이션 모니터링 시스템 : RAMS

송무찬,임성훈,김정선 漢陽大學校 工學技術硏究所 2002 工學技術論文集 Vol.11 No.-

본 논문에서는 네트웍에 분산된 어플리케이션의 실시간 모니터링을 통해서 어플리케이션 상태를 효과적으로 관리할 수 있는 모니터링 시스템인 RAMS(Remote Application Monitoring System)의 설계 및 구현을 제시한다. 이 시스템은 네트웍에 분산된 Host들의 효과적인 관리를 위해서, Host 어플리케이션의 상태를 모니터링 한다. RMAS는 모니터링 대상인 Host 어플리케이션의 모니터링을 담당하는 Agent, Host의 등록, 관리를 담당하는 Manager로 구성이 되어 있다. Manager와 Agent는 네트워크 단절 혹은 부하에도 자동으로 복구가 가능한 JINI를 최대한 활용함으로써 다른 시스템에 비해 시스템의 구성 및 관리가 용이한 특성을 가진다. This paper presents the design and implementation of a Remote Applicaions Monitoring System(RAMS) that enables us to effectively manage distributed applications through a real-time monitoring of their respective resource usages. The RAMS is a centralized system that consists of many distributed agents and a single manager. An agent on each host of interest is in charge of collecting and reporting the status of local applications. The manager manages agent registration and provides a central access point to the selection and monitoring of distributed applications. The salient features of the system include robustness and portability. The adoption of JINI greatly facilitates an automatic recovery from partial network failure and host failure.

NiAl/Ni₃Al 2상 합금의 상변태 및 미세조직에 미치는 제3원소 첨가효과

송성훈,김수현,오명훈,위당문 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.12

The microstructural evolution of b-NiAl/γ' -Ni3Al two-phase (Ni_(66)Al_(34))_(100-x)X_(X)(X=Ti, Si, Nb) alloys during various heat treatment (quenching and aging) were systematically studied. It was found that the microstructural features of the two-phase NiAl/Ni₃Al alloys could be divided into three types : lamellar, mesh and Widmansttten microstructures. The reason why those three types of microstructure were formed could be explained by the change of austenite start temperature(As temperature) depending on the ternary elements. In case of As>250℃, the lamellar microstructure was formed by following phase transformation: Martensite→Ni5Al3→β+γ' . In this case, the NiAl martensite was quickly transformed into the Ni5Al3 phase at 250℃ by a re-ordering reaction. In case of 20℃ <A_(s)<250℃, two types of mesh microstructure were formed depending on the ternary element. When Ti and Nb were added as a ternary element, the β→Ni_(5)Al3 transformation occurred very quickly, but not in the case of Si addition. Hence, the final mesh microstructures showed somewhat different microstructural features. On the other hand, in case of A_(s)<20℃, the direct β→β+γ' transformation occurred because the martensitic transformation could not occur due to its very low M_(s) temperature, resulting in the Widmanstatten type microstructure.

수정진동자를 이용한 계면활성제의 특성 분석

송성훈,박진영,이행자,조홍식,장상목 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.2

The phase transition phenomena and the phase separation phenomena of surfactants(SPES) are analyzed using QCA with resonant frequency and resonant resistance. The phase transition phenomena of SPES at 30℃ can be determined by measuring the resonant frequency and resonant resistance by lecithin coated on quartz crystal. The surfactants capacity of SPES can be analyzed by measuring the resonant frequency and resonant resistance of surfactants using QCA.

XPS와 AFM에 의한 올리고펩타이드의 자기 집합화 단분자막 분석

송성훈,박진영,김우식,Nakamura, Chikashi,Miyake, Jun,장상목 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.1

금속 기판 위에 유기 박막을 형성하는 방법 중에서 티올기와 Au와의 결합을 이용한 자기집합에 관한 연구가 활발히 진행되고 있다. 포르피린 유도체와 강하게 결합하는 타올기를 가지는 올리고펩타이드 PSP1과 PSP2를 합성하여 MOPS 완층용액에서 금표면에 자기집합화 단분자막(self-assembled monolayer, SAM)을 형성시켜 X-ray photoelection spectroscopy(XPS)와 atomic force microscopy(AFM)을 이용하여 분석하였다. 그 결과 PSP2의 경우와 PSP1의 경우보다 Au표면에서 SAM이 더욱 더 잘 형성되고 있음을 알 수 있었고 MOPS완충용액에 존재하는 황 이온의 영향도 알 수 있었다. 이 결과는 구성단위로부터 이론적으로 계산한 SAM막의 steric energy 값의 차이에서 유추한 결론과 일치하였다. Recently, the self-assembled monolayer(SAM) of thiols on nible metals has been studied intensively. Oligopeptides such as PSP1(Tyr-Ala-Gly-Tyr-Cys) and PSP2(His-Ala-Ser-Cys) with thiol group, which interact strongly with a typical cationic porphyrin derivative, are synthesized. Peptides adsorption from the liquid phase on Au has been studied using X-ray photoelection spectroscopy(XPS) and AFM image. XPS provides further evidence that the primary adsorbate species is bonded to Au through the sulfur atom. By the analysis of XPS spectra and AFM image, it is found that PSP2 is self-assembled better than PSP1 and the sulfur ion MOPS buffer solution has an effect on the self-assembling performance. This result is coincident with the calculation result of steric energies of Au-Peptide bonded SAM structure.

수정진동자를 이용한 2가이온의 전기화학적 특성 분석

송성훈,김종민,박지선,손진언,김영한,장상목 동아대학교 공과대학부설 생산기술연구소 1998 生産技術硏究所硏究論文集 Vol.3 No.2

This paper shows eletrochemical extraction property changes of dyed cations by the various eletrochemical conditions using quartz crystal technique. The quantitative and qualitative changes of electrode surface was monitored measuring oscillation parameters of quartz crystal. The results suggest that the eletrochemical extraction of cation is influenced by the various factors such as ionic size, ionic intensity and tendency of ionization.

有機色素分子와 陰이온 界面活性劑 사이의 相互作用에 關한 吸收分光學的 硏究

송기동,김일두,박성규,김준태,김성현 조선대학교 기초과학연구소 1990 自然科學硏究 Vol.13 No.1

The metachromatic behavior of methylene blue (MB) ia aqueous solution and in the presense of sodium dodecyl sulfate (SDS) have been studied by the absorption spectroscopic method. The results are as follows. The association force of the MB molecules in aqueous solution seems to be complex of three factors, i.e., London's dispersion force, the hydrophobic interaction and the interaction between permanent dipoles it has been measured of critical micelle concentration (CMC) in aqueous solution of SDS and that of MB-SDS to be 8.0mM and 7.9mM respectively. This indifference between CMC values of the pure SDS and MB-SDS system would mean the formation of dye-rich induced micelles(drim). The spectral changes of MB-SDS system with the addition of the inorganic salts have been observed. The addition of the salt into the solution causes the redistribution of MB molecules in the complex(D_n^+ S_m^-). It would be resulted from the decrease of the stacking effect between the bound MB molecules. The spectral changes observed in the MB-SDS system with the increase of the S/D values are analyzed and the behavior of the meta band is explainsd in terms of the stacking theory and micelle formation theory

유기색소분자(MB)와 고분자음이온(PVS)사이에 염효과에 관한 연구

송기동,김일두,박성규,김성현 조선대학교 기초과학연구소 1989 自然科學硏究 Vol.12 No.1

The metachromatic behavior of methylene blue(MB) in aqueous solution and in the presence of polyvinylsulfate potassium(PVS) was carried out by use of absorption spectroscopy. The salts examining the addition effect were salts (NaCl, KCl, LiCl, NH_4Cl, CH_3)_4NCl and urea). The remarkable increment of methylene blue aggregation with increase of various salts concentration was observed. This phenomenon is due to couter ions from salt which presumably reduces the repulsion force among the molecules of cation dye. In this study, the degree of aggregation appeared differently according to the addition of various salts and these effect was ascribed not only to concentration of counter ions, but also to cation of the salts. The characteristic changes of metachromatic band with the change of P/D value were discussed in terms of stacking theory. The appearance of metachromatic band is explained as a stacking effect of bound dye molecules on the surface of polymer chain and the disappearance of the band at higher P/D values is attributed to the redistribution of bound dye molecules over the excessive binding sites.

소아 두뇌외상의 임상적 고찰

서성일,송시헌,김성호,김관태,김윤 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.2

The clinical analysis was carried out with 182 cases of craniocerebral injuries under 15 years of age, admitted at the Department of Neurosurgery, Chung Nam National Universty Hospital during the period from September, 1990 to September 1993. Following results were obtained : 1) There were 133 males and 49 females and sex ratio was 2.7% 2) Age incidence of the accidents was greatest at 6 years of age and mostly distributed to the age group between 4 to 7. 3) Seasonal peak of the accidents was at May. 4) The accident occurred mostly botween 4 P.m. and 6 P.m in a day.5) The most frequent cause of the craniocerebral injuries was traffic accident(105cases, 57.69%) 6) No deterioration of cansciousness before and after the admission was doserved in 68cases(37.36%) 7) Pupillary change was observed in 25 cases and Babinski sign was elicitable in 31cases 8) Early convulsion and vomiting were frequent symptoms in childhood. 9) Skull fracture was observed in 72 cases(39.56%) in which linear fracture was most frequent and predilection site was parietal bone. 10) The accompanying rate of skull fracture in intracranial hemorrhage was 65.54% 11) Associated injures were found in 44 cases(24.18%). The frequent ones were e xtremity fracture, clavicle fracture 12) The overall mortality was 7.14%.

주사용 발프로산 나트륨(DEPAKINE^(�)) 투여에 의한 항전간 효과의 유효성 및 안전성에 관한 임상적 연구

김성호,서성일,송시헌,김관태,김윤 최신의학사 1994 最新醫學 Vol.37 No.8

중추신경계 화농성 감염의 수술적치험

김성호,송시헌,김관태,김윤 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.2

Authors experienced 36 surgical cases of pyogenic central nervous system infections including brain abscess, subdural empyema, skull osteomylitis with epidural abscess, intraspinal abscess and other rare infections. The incidence was hightest in the 5th and 6th decade, and male patients were predominant. About 56% of the CNS infections were occured after opdraions. The most common causative organisms were staphylococcus aureus. WBC count, ESR and body temperature were not diagnostic in CNS infections. No patient died among the brain abscess cases and the overall mortality rate of CNS infections was 8%.