인슐린 비의존형 당뇨병 환자에서 당뇨병성 신증의 지표로서 혈청과 요Ⅳ형 collagen의 의의

장태종,최병진,반금진,노영호,김소연,조민구,이권전,김윤권 대한신장학회 1996 대한신장학회잡지 Vol.15 No.4

전류제어형 PWM컨버터를 이용한 동기발전기용 여자시스템에 관한 연구

장수진,류동균,서민성,김준호,원충연,이진국 성균관대학교 2003 학술회의지원논문목록집 Vol.2003 No.-

동기발전기 출력전압은 여자시스템의 계자전류 제어에 의해 일정하게 유지된다. 고주파 PWM 컨버터(전류제어모드 buck컨버더)형태의 여자시스템은 부하변동이 발생하였을 때 동기발전기의 계자전류를 제어하게 된다. 이 논문은 정상상태 및 과도상태에서의 안정화를 개선하기 위하여 여자시스템의 설계 및 실험에 대해 다루었다. 시뮬레이션 및 실험 결과는 제안된 여자시스템이 50kW 동기발전기의 DVR에 의해 응답시간이 개선되었음을 보여주었다. The output voltage of synchronous generator is regulated constantly by field current control in excitation system. High frequency PWM converter (current control mode buck conveter) type excitation system for synchronous generator is able to control exciter current when the load change happened. This paper deals with the design and evaluation of the excitation system for a synchronous generator to improve the steady state and transient stability. The simulation and experimental results show that the proposed excitation system is able to improve the response time by the DVR(digital voltage regulator) of 5O[kW] synchronous generator.

화상창상의 치유 및 반혼형성 과정에서 신경펩티드의 변화

장영철,범진식,이종욱,오석준 대한화상학회 2003 대한화상학회지 Vol.6 No.2

Cs-137 γ-선 조사장치의 방사선장 해석연구

전재식,채하석,이철영,오장진,이병영,명동범 충남대학교 기초과학연구소 1995 忠南科學硏究誌 Vol.22 No.1

In reference to the ISO-4037 and ANSI N13.11, appropriateness of the shielding and collimating system, and suitability of the irradiation and its environmental conditions of a 20 Ci Cs-137 gamma-ray irradiator installed in Korea Institute of Nuclear Safety(KINS) were investigated. Upon the installation of the irradiator, condition of collimator alignment and virtual beam cross section were examined by use of a portable He-Ne laser. In order to evaluate the fitness of the secondary(scattered) to primary ratio of the collimated gamma-ray beam from the irradiator in light of ISO and ANSI requirement, the measurements of the secondary to primary ratio were performed by use of a cavity type ion chamber which had been calibrated in a calibration laboratory that maintains reliable traceability. For the theoretical assessment of the gamma-ray field the collimated beam were divided into fifteen sectors and for each sector the secondary to primary ratio and the gamma-ray spectrum was simulated by means of Monte Carlo method. The outcomes were compared with the experimental results, and cause of scattering and the existence of alleged modifying factors in the irradiator were examined.

화상창상의 치유 및 반흔형성 과정에서 신경펩티드의 변화

장영철,범진식,이종욱,오석준 대한화상학회 2003 대한화상학회지 Vol.6 No.2

스키시즌권 구매자들의 스키장별 선호도 조사

장현철,김경식,방준현,최천진,엄정식,김응준,이루지 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

The purpose of this study was to examine the perception and preference of skiers in a bid to provide ski resorts with useful information about successful positioning strategy. The subjects in this study were 9,722 skiers who purchased season tickets from N web site that sold ski season tickets. Their online purchasing route and page view were analyzed to find out what factors affected their purchase of ski season tickets. The findings of this study were as follows: First, 78 percent of the people investigated were make, and 22 percent were female. By age, the largest group was in their 20s(5,344 skiers), followed by those in their 30s(3,434), those in their 40s(631) and teenagers(229). Second, their page view rate with Yangji recorded highest with 24%, followed by Sungwoo Resort with 23% and Chonmasan with 13 percent. Third, by geographic area, the skiers from southern Gyeonggi province bought the largest number of tickets for the 2002/2003 season, followed by Gangweon province residents and northem Gyeonggi province dwellers. In the case of the 2003/2004 season, those from Gangweon provinece pruchased the most tickets, followed by southern Gyeonggi province dwellers and north Gyeonggi province residents.

콘크리트 크리프와 건조수축의 CEB-FIP Model Code와 ACI Code의 비교

전쌍순,박태균,황택균,엄장섭,진치섭 釜山大學校生産技術硏究所 2002 生産技術硏究所論文集 Vol.61 No.-

크리프 현상으로 인하여 구조물의 변형이나 처침은 시간의 경과와 더불어 중대하게 되고, 라멘, 아치 등과 같은 부정정 구조물에서는 건조수축으로 인한 부재의 변형 때문에 큰 수축응력이 일어난다. 따라서, 일시적으로 작용하는 하중에 비하여 지속하중이 큰 구조물에 있어서는 크리프의 영향을 설계해야 하고, 콘크리트 구조설계에서 건조수축은 매우 중요하다. 우리나라 콘크리트 설계기준을 비롯하여 세계각국의 코드에 크리프와 건조수축에 대해서 규정하고 있다. 그러나, 크리프와 건조수축에 관한 규정이 매우 복잡한 식으로 제시되어 있어 수 계산으로는 크리프 및 건조수축병형률을 계산하기가 어렵다. 본 연구에서는 Windows 환경에서 쉽게 CEB-FIP Model Code 및 ACI Code에 의한 크리프와 건조수축 변형률을 계산할 수 있는 프로그램을 작성하여 글 결과를 서로 비교 고찰하였다. Concrete under stress undergoes a gradual increase of strain with time because of creep deformations of the concrete. The final creep strain may be several times as large as the initial elastic strain. Generally creep has little effect on the strength of a structure, but it will cause a redistribution of stress in reinforced concrete members at the service loads. When concrete loses moisture by evaporation, it shrinks. Shrinkage strains are independent of the stress conditions in the concrete. If restrained, shrinkage strains can cause cracking of concrete and will generally cause the deflection of structural members to increase with time. In 2000, the Korea Concrete Institute Code took up CEB-FIP Model Code instead of ACI Code on creep and shrinkage of concrete, but their calculation procedures are tedious and difficult. In this study, programs are provided and it will be useful for the practicing engineers.

경식도 심초음파도의 Direct Planimetry를 이용하여 측정한 대동맥판 면적의 심박출량 및 좌심실 구출율의 변화에 따른 정확도

진승원,김종진,김희열,박지원,전두수,윤호중,박준철,노태호,채장성,김재형,홍순조,최규보 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.8

體育授業에 對한 精神的技能 硏究(Ⅱ) : 중학교 남, 여 학생 A junior high school students

金榮珍,張俊源 仁川敎育大學校 1992 論文集 Vol.26 No.1

This study was investigated in order to supply physical education teachers with the degree of mental skill(in refereuce to six regimes) of physical education of the students in returu for 1427 middle school students(male 725, female 702). They include 1th, 2nd, and 3rd middle school students. The sample population were selected at random. The research instrument was PSIS(Psychological Skills Iventary for Sports) Form 5 designed by Michael J. Mahoney. The treatment of data used in this study was 2-way ANOVA. The conclusion were as follows: As for the mental skills on physical education, the region of a feeling uneasiness showed the difference with regard to grades(1st year: 48.233±9,959, 2nd year: 52.002±10.020, 3rd year: 50.485±10.119) and to sexes(male: 50.488±9.773, female: 49.536±10.203). In the concentration level of physical education instruction, there are difference among grades(1st year: 49.143±10.227, 2nd year: 51.560±10.198, 3rd year: 49.682±9.239), but there`s no difference between male(50.205±10.111) and female(49.808±9.860). With regard to the confidence region of physical education instruction, there are difference according to grades(1st year: 49.206±10.173, 2nd year: 51.141±9.921, 3rd year: 49.962±9.733) and to sexes(male: 50.932±10.371, female: 49.025±9.509). As the mental preparation level of physical education instruction, there`s no different resalt between male(49.308±10.756) and female(50.693±9.102) only, but no difference among grades(1st year: 49.309±10.790, 2nd year: 50.458±9.661, 3rd year: 50.488±9.078). In terms of the motivation region of physical education instruction, this study showed the difference among the grades(1st year: 50.393±10.541, 2nd year: 50.978±9.608, 3rd year: 48.458±9.425) and between male(51.172±10.299) and female(48.794±9.541). With a view to the team emphasis level of physical education instruction, it displayed the difference among the grades(1st year: 49.020±9.020, 2nd year: 50.473±10.461, 3rd year: 50.920±10.401), but no difference between male(49.421±10.140) and female(50.597±9.841).

실시간 신경망 적응 노이즈 필터 개발을 위한 기초설계

김진선,장탁순,홍준희 충남대학교 공업교육연구소 2003 論文集 Vol.26 No.1

This Paper describes a nonlinear adaptive noise canceller using neural network for machine tools controller system. Back-Propagation Learning Algorithm based MLP(Multi Layer Perceptron) is used an adaptive filters. In this paper, it assume that the noise of primary input in the adaptive noise canceller is not the same characteristic as that of the reference input. Experimental results show that the neural network base noise canceller outperforms the linear noise canceller. Especially to make noise cancel close to realtime, Primary Input is divided by Unit and each divided part is processed for very short time than all the processed data are unified to whole data.