졸-겔법으로 합성된 폴리이미드/실리카 복합체의 환경적 물성에 관한 연구

박성수,홍성수,이성환,김성완,박재현,김지경,박희찬 한국환경과학회 2003 한국환경과학회지 Vol.12 No.4

Two types of polyimide/silica composite films were prepared using sol-gel method through hydrolysis and polycondensation of tetraethoxsilane(TEOS) with the polyamic acid(PAA) and end-capped PAA solution. Sample were characterized by the means of differential thermogravimetry, X-ray diffractometry, scanning electron microscopy, universal test, impedance analyzer, chemical resistance test, etc. All of the PAA/silanol solutions heat-treated at 300℃ for 6h were transformed to polyimide/silica composites. It has been demonstrated that the properties of polyimide/silica composites were affected by the amount of silica addition and the bond type existed between polyimide and silica.

폐결핵 환자 혈청에서 수용성 Interleukin 2 수용체 및 Adenosine Deaminase 활성도에 관한 연구

고정희,박성규,백상현,박찬권,박병수,안진영,최우석,박정규 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.1

Interleukin-2 (IL-2) induces T cell proliferation in an autocrine manner and provides a means by which antigen triggered T cells can be clonally expanded in vitro. During the following activation, the activity of IL-2 is mediated by specific high affinity IL-2 binding membrane receptors which are expressed shortly after activation. In this process, a 42 KD-fragment (soluble IL-2R) is continuously cleaved off and circulates as a soluble marker of T lymphocyte activation. Elevated level of soluble IL-2R has been identified in the serum of patients with malignant autoimmune and allergic disorders, systemic parasitic infection, undergoing graft versus host disease, acute or chronic lymphocytic leukemia and HIV-infection. ADA (adenosine deaminase) completes the process of differentiation of T cell and is essential for progression of T cell maturation. Therefore level of ADA is to correlated with magnitude of T cell immune response. The fact that expression of sIL-2R and ADA activity increases in peripheral blood T-lymphocytes of patients with active pulmonary tuberculosis suggests that T cell activation might have a major role in the pathogenesis of pulmonary tuberculosis. In order to evaluate the T cell immune response in pulmonary tuberculosis, we measured the serum concentration of sIL-2R and ADA activity in 17 patients with current pulmonary tuberculosis, 10 chronic inactive pulmonary tuberculosis, 10 as normal controls. (1) Current pulmonary tuberculosis had significantly higher levels of sIL-2R (237.24±95.47)when compared with those of inactive tuberculosis (78.6±11.06). and the control (68.17±15.4) group. (2) ADA activity in current pulmonary tuberculosis was significantly increased (34.41±20.63) when compared with those of inactive tuberculosis (24.7±14.36) and control (17.65± 5.94) group. (3) There was good correlation between sIL-2R concentration and ADA activity in serum in current pulmonary tuberculosis group. (4) sIL-2R concentration and ADA activity was decreased significantly 6 months after anti-tuberculosis drug medication. In conclusion, sIL-2R concentration and ADA activity in serum in current pulmonary tuberculosis group was increased when compared with those of inactive pulmonary tuberculosis and the control group. By the way, T cell mediated immune response was enhanced in current pulmonary tuberculosis, but in inactive chronic pulmonary tuberculosis who had treated by antituberculosis drug medication, the concentration of sIL-2R and ADA activity was nearly normal.

대량의 각혈로 사망한 장티푸스 1예

한상우,유진홍,권순석,김성훈,박지찬,홍은정,최경성,박용완,장준희,안지원,박유경,강지영,박상미,신완식 대한감염학회 2004 감염과 화학요법 Vol.36 No.5

We experienced a 25 year-old male patient with typhoid fever complicated with massive hemoptysis. Pulmonary complication in typhoid fever is very rare and to our knowledge, there has been no report of hemoptysis as a main cause of death with this disease. We herein report a rare case of typhoid fever.

초등학교 제7차 체육과 교육과정의 목표 및 내용분석

박찬홍,심재성 公州大學校 藝體能硏究院 스포츠 科學硏究所 2004 스포츠科學硏究所論文集 Vol.16 No.-

The purpose of this study were to analyze the objectives and contents of the seventh curriculum of physical education in the elementary school to help understand the curriculum, to present the course of elementary school physical education to the elementary school teachers, and to detect problems to be a help to the next curricular revision. After analysis on this research, I got the conclusions as follows ; First, the subject objectives were analyzed on the basis of the standard of objective classification by Bloom, Bucher, Barrow, Nash. Stoodley, Brownell & Hagman, Hetherington, Irwin, and Willgoose. Second, the unit objectives were analyzed on the basis of the standard of objective classification by Bloom, Bucher, Barrow, and purpose process curriculum framework. Third, the sixth and seventh curriculums were compared and analyzed. Fourth, the contents of the seventh curriculum of physical education were analyzed. The conclusions about analysis of the objectives and contents of the seventh curriculum of physical education in the elementary school are as follows ; First, by the standard of objective classification of nine scholars as Bloom, Bucher, Barrow and so on, we can understand same distribution of term statement about psychomotor, cognitive and affective domain, this shows a unity of objectives of physical education in the seventh curriculum of physical education. The standard of objective classification as Nash, Stoodley, Brownell & Hagman, Hetherington, Irwin, Willgoose, etc. shows same term distribution, and this reflects the character of synthetic subject which shares functional, scholastic, prescriptive character of the seventh curriculum of physical education. Second, in the analytical conclusion by the standard of classification of Bloom, the terms stated best are basic exercise of psychomotor domain, exercise method of cognitive domain and exercise function of psychomotor domain. Many term distributions in the 'basic exercise' of psychomotor domain are because of the seventh curriculum of physical education in the elementary school setting the basic in the moving education simulation, and emphasize a method and function of exercise to take shape various moving desire of students. In the analytical conclusion by the standard of classification of Bucher, the terms stated best are a motor function of developmental domain of exercise, a basic exercise of developmental domain of exercise, a method of exercise of cognitive domain. The seventh curriculum of physical education in the elementary school is based on moving education simulation, and show up many term distributions about 'motor function' and 'basic exercise' of developmental domain of exercise. The method of exercise is emphasized to take shape various physical activity and moving desire. In the analytical conclusion by the standard of classification of Barrow, the terms stated best are a understanding about the health of cognitive developmental domain and principal of good physical motion exercise, sports' function of developmental domain of psychological exercise and attitude of social developmental domain. The subordinate objectives of the seventh curriculum of physical education in the elementary school emphasize a motor function that participate actively to various exercise, and improve sports function with a background about understanding of principal of health and good physical moving exercise to improve physical strength and psychological health, and emphasize desirable motor attitudes. In the analytical conclusion by the standard of classification and purpose process curriculum framework(PPCF), the terms stated best are conquest of environment, social interaction and individual developmental domain, and each conceptional element has same distribution so as character prescribed in the seventh curriculum of physical education, don't emphasize only one domain, cognition or affective domain but pursuit external value, that is, realization of moving and healthy preservation and improvement, affective refinement, social cultivation through physical education in the elementary school to contribute to improve quality for life of the human. Third, the conclusions of comparison and analysis about the sixth curriculum and the seventh curriculum of physical education are nearly same, but the seventh curriculum is presented to nation common basic of physical education curriculum bounding elementary, secondary school. And the 'method' section is divided a teaching & learning method and a standard of textbook's development and discussion, and the standard of textbook's development and discussion that undertakes a important responsibility to practice of curriculum was presented newly. The contents are organized by objective and affective domain.

다단계 수리체계의 성능평가를 위한 폐쇄형 대기행렬 네트워크 모형

박찬우,김창곤,이효성 한국경영과학회 2000 한국경영과학회지 Vol.25 No.4

In this study we consider a spares provisioning problem for repairable items in which a parts inventory system is incorporated. If a machine fails, a replacement part must be obtained at the parts inventory system before the failed machine enters the repair center. The inventory policy adopted at the parts inventory system is the (S,Q) policy. Operating times of the machine before failure, order in lead times and repair times are assumed to follow a two-stage Coxian distribution. For this system, we develop an approximation method to obtain the performance measures such as steady state probabilities of the number of machines at each station and they probability that a part will wait at the parts inventory system. For the analysis of the proposed system, we model the system as a closed queueing network and analyze it using a product-form approximation method. A recursive technique as well as an iterative procedure is used to analyze the sub-network. Numerical tests show that the approximation method provides fairly good estimation of the performance measure of interest.

IDL 컴파일러에서 스터브 코드의 최적화

박찬모,홍성표,이정기,이준 조선대학교 에너지.자원신기술연구소 1999 에너지·자원신기술연구소 논문지 Vol.21 No.2

The programmer in the distributed environment is often faced with problems when writes a communication code. One is written the codes by hand and the other is by CORBA IDL compiler. When the programmer writes the code by hand then the speed of the program may be increased, but the human effort required to implement and maintain is greatly increased. If the code is generated using a CORBA IDL compiler then programmer effort will be reduced, but the performance of the Application program may be poor. In this paper, we suggests the way that the stub code is maintain the enough free space before marshaling the data into message buffer. This methods were increased the performance of Application program and solved the problems that optimizing of code.

國際環境法에서 非政府間機構의 役割

朴炳度,洪性讚 건국대학교 사회정책연구소 1999 사회과학연구 Vol.10 No.-

마이크로파로 가열된 리튬 실리케이트계 무기고분자의 핵 생성 및 결정화에 관한 연구

박성수,박찬영,민성기 釜慶大學校 1999 釜慶大學校 論文集 Vol.4 No.1

A comparison of nucleation and crystallization of amorphous lithium silicate under the conventional and microwave processing was investigated. Optical microscopy(OM). X-ray diffractometry(XRD), and differential thermal analysis(DTA) were used to evaluate the results. Both conventional and microwave heat-treated samples had same nucleation temperature, 460~480℃, and same temperature of maximum nucleation rate, 580℃. From the results of DTA, the probability for the bulk crystallization increased in the microwave heat-treated samples. compared to conventional one. Degree of crystallization increased with increasing crystallization temperature in both conventional and microwave heat-treated samples. However, pattern of spherulites growth under the microwave processing appeared to be quitely different from that under the conventional one due to its internal heating.

주문-조립시스템의 설계 및 성능평가

박찬우,이효성 한국경영과학회 2002 한국경영과학회지 Vol.27 No.4

We study multi-component production/inventory system in which individual components are made to meet various demand types. We assume that the demands arrive according to a Poisson process, but there is a fixed probability that a demand requests a particular kit of different components. Each component is produced by a flow line with several stations in which the processing times of each station follow a two-stage Coxian distribution. The production of each component is operated by an independent base-stock with blocking. We assume that the time needed to assemble final products follows a general distribution and the capacity of an assembling facility is sufficiently large. The objective of this study is to obtain key performance measures such as the distribution of the number of each orders for each final product and the mean time of fulfilling a customer order. The basic principle of the proposed approximation methods is to decompose the original system into a set of subsystems, each subsystem being associated with a flow line. Each subsystem is analyzed in isolation using a method. As iterative procedure is then used to determine the unknown parameters of each subsystem. Numerical results show that the accuracy of the approximation method is acceptable.

正常家兎의 聽性腦幹誘發反應

朴贊日,尹成基,南富鉉 충남대학교 의과대학 지역사회의학연구소 1985 충남의대잡지 Vol.12 No.2

Auditory brain stem response measurements were performed in normal rabbits, anesthetized with intraperitoneal urethane. Auditory brain stem responses in rabbits showed stable patterns of 5 waves, similar in man, within 4.0 msec after sound stimulation. And the wave latencies were decreased with increasing of the intensity of stimulation. As conclusion, the rabbit offers attractive features in auditory brain stem response and it can be used in animal experiments for electrophysiologic study on 8th nerve and auditory brain stem pathway.