중학교 남자 테니스 선수의 운동기능수준별 시합 전 경쟁상태불안

남인수,최인태,전중기,윤재만,고성경,이종삼,임승현 대구대학교 인문과학연구소 2008 人文科學硏究 Vol.31 No.-

The purpose of this study was to investigate if there is any difference in the level of competitive state anxiety according to the level of motor skill before the game and to provide the players with basic data for the mental practice. The subjects of this study consist of 20 men's a middle school tennis players. The experimental group was divided into superior players group and inferior players group. And then by using a CSAI-2 questionnaire, three subfactors of competitive state anxiety, or cognitive state anxiety, somatic state anxiety and state self-confidence were measured. The method of measurement was carried out three times, or one week, one day and two hours before the game. The results of this study were as follows. First, About both cognitive state anxiety and somatic state anxiety, inferior players were significantly higher than superior players. Second, About state self-confidence, superior players were significantly higher than inferior players. Third, As the game was around, both cognitive state anxiety and somatic state anxiety which all the players including superior and inferior players had increased. But the state self-confidence of all players decreased.

초음파 기관지 내시경으로 진단한 기관기관지 골연골형성증 1예

이천우,옥철호,정만홍,장태원,임성경,조은주,이신준,이혜원,구상건,천봉권 고신대학교 의과대학 2011 고신대학교 의과대학 학술지 Vol.26 No.2

Tracheobronchopathia osteochondroplastica (TO) is a rare benign disease of unknown etiology characterized by accumulation of calcium phosphate in the submucosa of large airways and benign proliferation of bone and cartilage resulting in nodular formation. We report a case of tracheobronchopathia osteochondroplastica diagnosed by Endobronchial ultrasonography in a 56-year-old man. Chest Computed Tomography revealed thickening of tracheal and bronchial wall, and multiple nodules through whole trachea. Endobronchial ultrasonography showed numerous submucosal nodules with hetero-echogenecity in the third and fourth layers. Histopathological examination revealed nonspecific bronchitis with squamous metaplasia and metaplastic ossification. We confirmed tracheobronchopathia osteochondroplastica. The patient's symptoms were successfully treated with antibiotics and oxygen supplyment. endobronchial ultrasonography can helpful diagnosis in tracheobronchopathia osteochondroplastica.

의학적 병동에서의 환경 치료적 접근

전석균,이만홍 大韓神經精神醫學會 1987 신경정신의학 Vol.26 No.2

The authors conducted five times Ward Atmosphere Scale (WAS) to evaluate the therapeutic milieu according conversion from medically oriented ward to milieu therapeutic ward. With the abstracted data, was analyzed a changing process according time variable, was compared staff's perception with patient's that of ward atmosphere. Also, to grasp the problems changing in the process of change, it was practiced participant observation, analysis of recording, individual interview with staffs. The results showed that: 1) Owing to a increase of treatment activity program, went on increasing in participation both patient and staff, but have been stagnant a improvement according time variables, have been ineffective in a introducing stage. 2) About ward atmosphere, staffs perceived relatively more negative and pessimistic than patients. 3) In conversion of treatment form, appeared a inferior understanding of staff for milieu therapy, a resistance and anxiety on conversion, and remains a transitional stage rather than a fixational stage because of inharmonious communication and insufficient cooperation for Milieu Therapy.

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.

FDM에서 경사면의 표면과 면적오차법의 관계에 대한 연구

전재억,정진서,황영모,김수광,김준안,계중읍,하만경 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-

In any rapid prototyping process, the layer by layer building process introduces an area error between the staircase and the surface line specified by the computer-aided design model. This affects the dimensional accuracy as well as the surface finish for different part build orientations. This paper describes a methodology for computing the area error for any orientation of the part built by the fused deposition modelling system. This technique can be applied to determine the best build orientation of the part, based on the minimum area error. This technique is verified by comparing the results with the experimental measurements of the area error of the parts built at different orientations.

영양염류 농도에 따른 부레옥잠(Water hyacinth)의 성장특성에 관한 연구

전만식,김범철 江原大學校 附設 環境硏究所 1994 環境硏究 Vol.11 No.-

The growth rate and the nutrients removal efficiency of water hyacinth in artificial medium were studied. Water hyacinth showed maximum growth rate at the density of 5-18㎏ wet wt./m^(2), when the yield was 0.67-1.23㎏ wet wt./m^(2)/day. The removal rate of phosphorus and nitrogen was 153 and 1,184㎎/m^(2)/day, respectively. Growth rate significantly decreased at low nutrients concentration below 0.8㎎P/ℓ and 3.1㎎N/ℓ. The maximum specific growth rate(μ_(max)) of water hyacinth was 0.101day^(-1) and half saturation concentration(Ks) was 0.032㎎P/ℓ and 0.410㎎N/ℓ for phosphorus and nitrogen, respectively. The shoot/root weight ratio, varying from 1.8 to 14.1, was smaller at low nutrient concentration due to the enhanced development of root. The contents of phosphorus and nitrogen in the dried tissue were 0.22-1.02% and 1.4-4.3%, respectively. The water content was 88.9-93.9%. The removal efficiencies of P and N were 90% and 71% when retention time was 5.7day, and the standing crop was 3.8㎏/m^(2).

비철금속의 선삭에서 측면경사각과 이송량이 표면 거칠기에 미치는 영향

전재억,정진서,하만경 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.4

In the present industry. there are necessary to cut not only iron metals but also non-ferrous metals such as aluminum, brass, plastic and wood(Paulownia). therefore it had been made the studies of non-ferrous metals by many scientists. we hope this kind of study will continue. The purpose of this study is to conduct the basic experiment about influencing of the feedrate adjustment and the change of the side rake angle at turning of non-ferrous metals. As the results, the surface roughnesses were on the decrease with a side-rake angle and feedrate diminution in the case of the plastic, brass, aluminum, and paulownia.

선삭에서 이송량조정에 의한 칩의 형태 제어

전재억,하만경,백인환 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.3

The continuous chip in turning operation deteriorate, the precision of workpiece and can cause a hazardous condition to operator. Thus the chip form control becomes a very important task for reliable turning process. The chip forum is identified using the neural network of supervised data Through the measurement of energy radiated from the chip, The feed mechanism is adjusted in order to break continuous chip according to the result of the chip form recognition and it shows a good approach ;or precision turning operation.

FDM에서 Build Orientation이 쾌속조형물의 표면에 미치는 영향

전재억,서진호,권광진,권혁준,정진서,하만경 한국공작기계학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.-

Fused deposition (FD) modeling by Stratasys Inc., is one of the material deposition subfamilies of solid freeform fabrication (SFF) technologies. In this process, build material in the form of a flexible filament, is heated to a semi-liquid state and extruded from a controlled deposition head onto a fixtureless table in a temperature controlled environment. The position of nozzle is computer controlled relative to the base, which allows geometric complex models to be made to precise dimensions. FDM provide what the part was directly tested by the worker. It provide believable data. This Study is identify to surface roughness by build orientation adjustment. So, the paper is the study on surface roughness by build orientation at FDM.

고온 유리의 프레스 성형 공정 시뮬레이션

지석만,최주호,김준범,하덕식 한국 항공대학교 항공산업기술연구소 2001 航空宇宙産業技術硏究所 硏究誌 Vol.11 No.-

This paper addresses a method for numerical simulation in the pressing process of hot glass. Updated Lagrangian finite element formulations are employed for the flow and energy equations to accommodate moving meshes. The model is assumed axi-symmetric and creep flow is assumed due to the high viscosity. Commercial software ANSYS is used to solve the coupled flow and energy equations. Moving contact points as well as free surface during the pressing are effectively calculated and updated by utilizing API functions of CAD software Unigraphics. The mesh distortion problem near the wall is overcome by automatic remeshing, and the temperatures of the new mesh are conveniently interpolated by using a unique function of ANSYS. The developed model is applied to the pressing process of TV glasses. In conclusion, the presented method shows that the pressing process accompanying moving boundary can be simulated by effectively combining general purpose softwares without resorting to special dedicated codes.