관동맥질환에서 저밀도 지단백 입자 크기의 분포

임효영,김인숙,승기배,강동헌,전두수,장기육,박준철,이수영,홍순조,최규보 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.8

유아의 수개념 학습을 위한 시뮬레이션형 학습 모델의 설계

박영태,김준규 東亞大學校 學生生活硏究所 2000 學生硏究 Vol.26 No.-

The purpose of the study designed a simulational instructioil mode1 for problem solving learning applying the situational simulation and process simulation to the technique for developing situational learning coursewares based on constructivism. The follow conclusions were obtained from the results of the study. First, there's require simulation model based constructivism instructional theory. Second, we first studied and analyzed characteristics of infants. Third, we established a learning model with which infants might effectively learn numerical concept and developed a courseware in the basis of it. Fourth, in this model, the learner can explore his own path for himself. Fifth, the numeric concept simulation model consists of one simulators, such as polygon classfication, comparison, seriation, a helping room. Sixth, simulation model should be designed to be self- directed learning. Finally, the simulators are designed for a learner to get experiences just like in a real world. The helping room provides the basic concepts needed for simulation.

유아의 초인지 계발을 위한 컴퓨터 시뮬레이션 개발

박영태,김준규 동아대학교 학생생활연구소 2001 學生硏究 Vol.29 No.-

The purpose of the develop a computer simulation model for improve of metacognition of infant The follow conclusions were obtained from the results the study. First, there's require simulation model based computer program fidelty. Second, in this model, the learner can explore his own path for himself. Third, we first studied and analyzed characteristics of infants. Fourth, we established a learning model with which infants might effectively improvement metacognition. Fifth, simulation model should be designed to be self-directed learning. Finally, the simulators are designed for a learner to get experiences just like in a real world. The advice room provides the basic concepts needed for simulation.

고속주축 모니터링용 광파이버 변위센서의 파이버 특성에 따른 센서 성능 연구

박찬규,신우철,배완성,홍준희,이동주 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-

To make high speed spindle system work properly, sensors with outstanding resolution and dynamic characteristics are essential. An optical fiber displacement sensor is based on simple principles. Electrical signal responds to the optical flux change due to the displacement change between a target and a sensor probe. In this paper, the performance of optical fiber displacement sensor has been investigated according to properties of optical fiber. Firstly, optical loss has been measured before and after polishing optical fiber endface. Secondly, allowance of optical fiber bending has been tested. thirdly sensitivity and linear range of the sensor has been found out according to the shape of cross section of optical fiber.

5 급 와동의 복합레진 수복 시 발생되는 교두굴곡에 관한 연구

박준규,임범순,이인복 大韓齒科保存學會 2008 Restorative Dentistry & Endodontics Vol.33 No.2

본 연구의 목적은 복합레진의 중합수축파 탄성계수가 5 급 와동 수복시 교두굴곡에 미치는 영향물 평가하기 위함이다. 16개의 발치된 상악 소구치를 평균 크키가 비슷하게 2개의 group으로 분류하였다. 각각의 치아에 5급 와동을 형성하여 유동성 복합레진 (Filtek flow)과 전구치 수복용 hybrid 복합레진 (Z-250)으로 각 group을 충전하였을 때 나타나는 교두굴곡을 측정하였으며 그 후 수복단면을 주사전자현미경 (SEM)으로 관찰하였다. 각 복합레진의 중합수축률과 탄성계수를 측정하여 교두굴곡에 미치는 영향을 고찰하였고 다음과 같은 결과를 얻었다. 1. Piltek flow와 Z-250으로 충전한 group에서 교두굴곡량은 각각 2.18 ± 0.92 ㎛와 2.95 ± 1.13 ㎛으로 나타나 Filtek flow의 평균 교두굴곡량이 더 작은 것으로 측정되었으나 통계적 유의성은 보이지 않았다 (p > 0.05). 2. 수복단면의 SEM 관찰 결과 두 group의 시편 중 각각 2개의 시편에서 와동 내면에 접착이 탈락된 미세간격이 관찰되었다. 3. Filtek flow의 탄성계수값은 7.77 ㎬로 Z-250의 17.43 ㎬에 비해 절반 이상 낮았으며 중합수축률은 4.41%로 Z-250의 2.23%에 비해 더 큰 것으로 나타났다. 4. 교두굴곡에는 복합레진의 중합수축률 뿐만 아니라 수축응력의 발현에 영향을 준는 탄성계수가 복합적으로 작용함을 알 수 있었다. The purpose of this study was to evaluate the effect of the polymerization shrinkage and modulus of elasticity of composites on the cusp deflection of class V restoration in premolars. The sixteen extracted upper premolars were divided into 2 groups with similar size. The amounts of cuspal deflection were measured in Class V cavities restored with a flowable composite (Filtek flow) or a universal hybrid composite (Z-250). The bonded interfaces of the sectioned specimens were observed using a scanning electron microscopy (SEM). The polymerization shrinkage and modulus of elasticity of the composites were measured to find out the effect of physical properties of composite resins on the cuspal deflection. The results were as follows. 1. The amounts of cuspal deflection restored with Filtek flow or Z-250 were 2.18 ± 0.92 ㎛ and 2.95 ± 1.13 ㎛, respectively. Filtek flow showed less cuspal deflection but there was no statistically significant difference (p > 0.05). 2. The two specimens in each group showed gap at the inner portion ofthe cavity. 3. The polymerization shrinkages of Filtek flow and Z-250 were 4.41% and 2.23% respectively, and the flexural modulus of elasticity of cured Filtek flow (7.77 ㎬) was much lower than that of Z-250 (17.43 ㎬). 4. The cuspal deflection depends not only on the polymerization shrinkage but also on the modulus of elasticity of composites.

보일러 효율향상을 위한 초음파 발생장치의 개발

박정일,이석규,이호균,박준호 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.1

This paper describes the development of ultrasonic generator to enhance the combustion efficiency of the domestic boiler based on the cavitation property of ultrasonic wave. The following procedure shows the proposed energy-saving-precess of the boiler. (1) vibrate the BLT(Bolted Langevin Transducer) type ultrasonic vibrator. (2) amplify the vibrating energy using resonance principle through the designed hem installed before the injection nozzle. The proposed ultrasonic device is designed to produce smaller fuel particles to be mixed homogeneously with air, which finally reduces the fuel consumption of the boiler.

大邱地域 中小企業의 效率的인 技術開發 方案에 관한 硏究

全瑨文,張晩植,尹在坤,金圭昌,李栽燁,朴筍植,黃建夏 효성여자대학교 산업경영연구소 1988 경영경제 Vol.5 No.-

For modern business firms, the most important factor in determining comprtitiveness of a firm is technology, rather than capital. Technogical innovation is a driving force to develop an economy and is essential in growth and/or survival of a business firm. Following studies concerned with this subject, small business firms seem to be more efficient in technological innovation and developing new technology in several respects. Espercially in the new technology based industries, the small business firms have several advantages in technological innovation. In this study, we tried to show how to plan a technology development strategy in relation to management strategy when small business of theoretical and empirical study, we aimed to show the way to efficient management and procedure of technological innovation. For the research methodology, we firstly reviewed and analyzed current and previous studies about technological innovation strategy, efficient management, and selection of R&D projects. Secondly, the results of this theoretical study was examined empirically. The empirical study contains 153 questionaires and 30 interviews for business firms of this area. In addition, for the evaluation criteria for the selection of R&D projects, we sent questionaires to 60 professors who teaches R&D OR in university or college level. The result of these questionaires was analyzed and compared with that of the business firms of this area. The result of this empirical study shows that top management of small business firms should notice the importance of technological innovation and try to stimulate R&D activity. For the evaluation criteria for R&D projection, the criteria which could reduce the possibility of future uncertainty, maximize profit, and he suited for the situation of the business firm, should be established.

고속주축 모니터링용 광파이버 변위센서의 레이저 다이오드 출력에 따른 성능평가

박찬규,신우철,홍준희,이동주 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

This paper is to develop an optical fiber displacement sensor for monitoring high speed spindle. Proper magnitude of optical power as well as amplification of output signal are necessary to improve sensitivity of the sensor. In this paper, to meet the need of improvement of the sensor resolution, we choose proper optical power and amplification level through speculating on optical power of a laser diode.

장기간의 저항성운동이 각ㆍ완근력 및 호흡순환능력에 미치는 영향

김영준,박태열,최규환 東亞大學校附設스포츠科學硏究所 1999 스포츠科學硏究論文集 Vol.17 No.-

The purpose of this study was to investigate the distribution of the physical girth, muscular strength, Oxygen Consumption and pulmonary capacity by resistance Training. The subjects of this study were consisted with 10 adult males. The circuit of 10stations performed on 3 circuits, 3day/week. The subjects exercised at 60-70% of 1-RM, executing as many repetition as possible in 30sec, followed by 15sec rest as the subject moved to the rest station the training program. The result were as follow: 1. After resistance training was increases significantly in girth of upper arm, thigh, lower thigh. 2. After resistance training was increased significantly in grip strength, back strength, arm strength, leg strength. 3. After resistance training was increased significantly in HRmax, VEmax, but non-significantly VO₂max. It was concluded that resistance training are a good general conditioning activity, attends to more than one component of fitness.

고속 주축 상태 모니터링용 광파이버 변위 센서 설계 제작 및 성능평가

홍준희,박찬규,신우철,이동주 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

This paper is focused on practical applicability of the optical fiber sensor considering the machine center which is going to use them. Optical fibers may be fluctuated because the machine center operates as column moving type. This causes distortion of the sensor output signal. To reduce this problem, we have improved the sensor structure and its bracket. And we evaluated performances of the sensor.