장애인 수상 스포츠에 대한 문헌연구

최승오,홍복교 江原大學校 附設 體育科學硏究所 1998 江原大學校附設體育科學硏究所論文集 Vol.- No.22

바나듐 산화막을 활용한 습도센서의 제조에 관한 연구

이승철,최복길,김남철 公州大學校 工學硏究院 生産技術硏究所 2004 論文集 Vol.12 No.-

Vanadium oxides have been widely used in a variety of technological applications such electrochromic devices as infrared detectors and are expected as a material suitable for gas sensing applications. Thin films of Vanadium oxide (VOx) have been deposited by r.f magnetron sputtering under different oxygen partial pressure ratios(0%, 10%) and substrate temperatures(27℃, 400℃). Humidity-sensitive properties of resistive sensors having interdigitated electrode structure are characterized. Our sensors show good response to humidity over 20%RH to 80%RH Vanadium oxide films deposited with 0%O2 partial pressure at 400℃ exhibit greater sensitivity to humidity change than others.

低周波 電磁場 속에서 불활성 기체 원자에 의한 電子의 산란단면적

정경복,장차익,최승평 조선대학교 기초과학연구소 1997 自然科學硏究 Vol.20 No.1

The scattering cross section is the physical quantity which is susceptible of a reasonably direct experimental measurement and which at the same time lends itself readily to calculation, and which establish contact between scattering theory and scattering experiment to assist each other. We have calculated one-photon free-free absorption cross sections without target distortion at the frequencies of the CO_2, Nd, and ruby lasers, for targets consisting of the ground states of He, Ne, Ar. The calculations yield total cross sections averaged over all orientations of the polarzation, which is taken to be linear. Electron energies are in the range up to about 13 eV. The atomic potential used to represent the interaction of the atom in our calculation is the same one that is replaced atom by the potential used by Robinsion and Geltman in the evaluation of photodetachment cross-sections. We used the Numerov method for numerical integration of our differential equations. This method appears to be most efficient numerical intergration scheme available for second-order differential equations with the first derivative absent.

스퍼터된 바나듐 산화막의 구조적, 전기적 특성에 미치는 진공 어닐링의 효과

이승철,황인수,최복길 公州大學校 工學硏究院 生産技術硏究所 2003 論文集 Vol.11 No.-

Thin films of vanadium oxide(VO_(x)) have been deposited by RF magnetron sputtering from V₂O_(5) target in gas mixture of argon and oxygen. The oxygen/(oxygen+argon) partial pressure ratio of 0% and 8% is adopted. Crystal structure and optical properties of films sputter-deposited under different oxygen gas pressures and in situ annealed in vacuum at 400℃ for 1h and 4h are characterized through XRD, XPS, RBS, FTIR, and optical absorption measurements. The films as-deposited are amorphous, but 0%O₂ films annealed for time longer than 4h and 8%O₂ films annealed for time longer than 1h are polycrystalline. I-v characteristics were distinguished between linear and nonlinear region. In the low field region the conduction is due to Schottky emission, while at high fields it changes to Fowler-Nordheim tunneling type conduction. The conductivity measurements have shown an Arrhenius dependence of the conductivity on the temperature.

유산소 운동 프로그램 참여 중년여성의 신체조성, 골밀도 및 영양소 섭취 분석

예정복,최승욱,백영호 釜山大學校 附設 體育科學硏究所 2007 體育科學硏究所 論文集 Vol.23 No.1

The purpose of this study was to find out the middle-aged women participate in aerobic exercise program on body composition, bone mineral density and nutrition. The subjects of this study were 14 middle-aged women(exercise group 7, control group 7) who take steady aerobic exercise for 6 months and the women sho take no exercise and a comparative analysis was made of the body composition, bone mineral density and nutrition....

1.88 A GeV ^56Fe 이온에 의한 원자핵 건판내에서의 발생각에 대한 연구

박복남,최승평,장차익,김동호 조선대학교 기초과학연구소 1990 自然科學硏究 Vol.13 No.1

LBL 667H 실험의 일환으로써 1.88A GeV ^56Fe이온이 원자핵 전판내에서 일으킨 핵반응을 비적스캔닝(along-the-track-scanning) 법으로 총 473개를 발견하였다. 그중 302개에 대한 방출각을 실험데이타로 삼아 ^56Fe 핵과 원자핵건판들과의 충돌에서 얻어진 다중도 분포의 여러파라미더와 이차파쇄핵의 각분포를 측정하여 6.2∼400 GeV 양성자-원자핵 상호작용과 비교검토 하였으며 알파입자에 대한 분포회귀함수는 β_T^-1??e^(r-nb)이고 β_T^-1=(e^(r_p-nb)) 임을 나타냈다. The results of multiple production produced by 1.88 A GeV ^56Fe ions in nuclear emulsion have been studied. Using by the along-the-track scanning method, We found 473 inelastic events and analysed 302 events. Angular distribution of secondary particles and several parameters of multiplicity distribution at the collisions of ^56Fe ions with emulsion nuclei are measured. And data are compared with those of 6.2-400 GeV protons with nuclei in nuclear emulsion. Regression function of alpha particles is well fitted by use of β_T^-1=exp(r-n_b).

ATM망의 가상경로 상에서 효율적인 대역관리

고승일,고성택,김경식,김경연,최영복 濟州大學校 産業技術硏究所 1998 산업기술연구소논문집 Vol.9 No.2

ATM(asynchronous transfer mode) is able to realize the full integration of various kinds of services. Effective bandwidth allocations using statistical multiplexing gain have been studied for the full integration of different kinds of services. In this paper. we present call admission control algorithm using complete bandwidth sharing and reserved bandwidth sharing. Complete bandwidth sharing is an efficient way for utilization of bandwidth. Reserved bandwidth sharing is an efficient way for preventing reverse pecking order. Using these two bandwidth allocations is an effective way for bandwidth utilization and stopping reverse pecking order. A computer simulation shows the results of the algorithm

쥐치아 치근면의 치주인대세포의 활성도를 평가하는 방법으로 MTT검색법의 적절성에 대한 조직학적인 검증

김현기,김의성,최인복,김진,이승종 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.5

The purpose of this study is to examine the viability of PDL cells in rat molars by using MTT assay and to verify the MTT assay through the histologic observation. Thirty of Sprague Dawley white female rats of 4 weeks old with a body weight of about 100 grams were used. Groupings are as follows : Immediate Group : Positive control group(n=10) after extraction immediately. Dried Group : Negative control group(n=10) after drying for an hour under warm dry. ViaSpan Group : 1hour ViaSpan group(n=10) after storing in ViaSpan at 4℃ for 1hour. Ten teeth of each group were treated as same as above and replanted to the original socket of experimental animals. After two weeks of replantation. all the experimental animals were sacrificed. And after fixation, extracted maxillary jaw was dimineralized. After it was embedded in paraffin. serial section by ViaSpan was carried out and for construction of specimen, hematoxylin eosin dye was used. The mean MTT measurement of immediate group(positive control) is 2.81 and the mean measurement of dried group(negative control) is 0.98 which is significantt differnt(P<0.05), The mean measurement of ViaSpan group is 2.65 and there is significant difference between dried group and ViaSpan group(P<0.05), However, there is no difference between immediate group and ViaSpan group. The average resorption points of immediate group is 3.03 points. In the dried group, average 6.44 points resorption and 2.68 points showed resorption in the ViaSpan group. Unlike with MTT assay, there was no significant difference between the immediate group and ViaSpan group. The usage of MTT assay as a viable cell marker may give us a better indication of the maintenance of periodontal ligament cell vitality.

강의 현대화 추진 및 활용방안 연구

구경완,이근복,장종국,김재홍,김영환,최제영,이승훈 永同大學校 1997 硏究論叢 Vol.3 No.1

본 연구는 각종 첨단 기자재를 활용한 강의 현대화 방안을 모색함으로서 공학교육의 효율성을 도모하고 학생들의 학습동기를 유발하여 창조적 능력을 갖츤 전문기술 인력을 양성하는 데 도움을 주고자 하는 것이다. 이를 위하여 현행 공학교육의 현황과 문제점을 분석하고 강의 현대화 사례를 조사하여 본 연구의 기초자료로 삼고자 하였으며, 학부·전공별 강의 현대화 추진 실태분석 및 개선방안을 모색한 후 이상의 연구결과를 종합하여 향후의 강의 형대화 추진방향을 걸정하였다. This study aims to help bring up the well-skilled and creative engineers by searching the modernization of education using various high technology facilities. For this, we analyzed the general condition and problems of current engineering education and surveyed the case study of the modernization of education as basic study. After analyzing the existing situation of promotion searching the proper improvement methods of it, we proposed the new direction of the modernization of education from now on.

스프렌딜 지속정(펠로디핀 5㎎)에 대한 스타핀 지속정의 생물학적동등성

조혜영,강현아,이석,백승희,박은자,최후균,문재동,이용복 한국약제학회 2003 Journal of Pharmaceutical Investigation Vol.33 No.4

Felodipine is a calcium antagonist that lowers blood pressure by reducing peripheral resistance by means of a direct, selective action on smooth muscle in arterial resistance vessels. Furthermore, it have been approved for the effective in angina pectoris and cardiac failure. The purpose of the present study was to evaluate the bioequivalence of two felodipine extended release (ER) tablets, Splendil (YuHan Corporation) and Stapin (Hana Pharmaceutical Co., Ltd.), according to the guidelines of Korea Food and Drug Administration (KFDA). THe felodipine release from the two felodipine formulations in vitro was tested using KP Ⅷ Apparatus Ⅱ method at pH 6.5 buffer solution. Twenty six healthy male subjects, 22.73±1.78 years in age and 66.66±7.28 ㎏ in body weight, were divided into two groups and a randomized 2×2 cross-over study was employed. After two tablets containing 5 ㎎ as felodipine were orally administered, blood sample was taken at predetermined time intervals and the concentrations of felodipine in serum were determined using column-switching HPLC method with UV detector. The dissolution profiles of two formulations were similar at pH 6.5 buffer solution. Besides, the pharmacokinetic parameters such as AUG_(t), C_(max) and T_(max) were calculated and ANOVA test was utilized for the statistical analysis of the parameters using logarithmically transformed AUC_(t) and C_(max) and untransformed T_(max). The results showed that the differences between two formulations based on the Splendil were 2.53%, 1.32% and 18.32% for AUC_(t), C_(max) and T_(mzx), respectively. There were no sequence effects between two formulations in these parameters. The 90% confidence intervals using logarithmically transformed data were within the acceptance range of log(0.8) to log(1.25) (e.g., log(0.86)∼log(1.20) and long(0.89)∼long(1.23) for AUC_(t) and C_(max), respectively). Thus, the criteria of the KFDA guidelines for the bioequivalence was satisfied, indicating Stapin ER tablet and Splendil ER tablet are bioequivalent.