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오태일(Tae Il Oh),이상준(Sang Jun Lee),김정순(Jong Soon Kim) 대한공업교육학회 1999 대한공업교육학회지 Vol.24 No.2
To identify the characteristics about the motion of a vehicle, it is often necessary that the inertia properties of the powertrain on the vehicle should be gained, and these values are very important data in the analysis of a vehicle dynamics. But it is not easy that we get the inertia properties of the powertrain for the complexity of the shape. This paper introduces the procedure to obtain the inertia properties using the approach of an experimental modal analysis. The properties of six rigid body modes are obtained by exciting the powertrain fixed in strong steel stands in low frequencies of the band 0 ∼ 40 Hz, and the inertia properties are derived from the values such as frequencies and mode shape vectors about the six rigid body modes. Several mathematical methods based on the theory of modal analysis are used to estimate the inertia properties. It is expected that this type approach will be used in increasing number applications during estimation of inertia properties for vehicle dynamics analysis.
오태동(Tae Dong Oh),이준수(Jun-Soo Lee),오재인(Jay In Oh) 한국IT서비스학회 2010 한국IT서비스학회지 Vol.9 No.4
The purpose of this study is to investigate the relationship among users perception on the characteristics of U-Services, attitude factors as mediating variables, and behavioral intention toward U-Services as the dependent variable. Based on the literature review on the related theories, the research model which analyzes the behavioral intention toward U-Services was developed. The result from the analysis of the data collected validated the U-Services Acceptance Model (USAM) proposed in this study as a sound construct framework. Futhermore, significant insights on the USAM were provided for the stakeholders and future researchers in the field of U-Services Acceptance.
모바일 하버 컨테이너 적재 유도 시스템에서 롤러 가이드 적용 및 해석
오태오(Tae-Oh Oh),박정홍(Jung-Hong Park),김광훈(Kwang-Hoon Kim),손권(Kwon Son) 대한설비공학회 2011 설비공학 논문집 Vol.23 No.9
The purpose of this study is to evaluate a simulation model of a stacking guidance system (SGS) with a roller guide applicable to the mobile harbor. The study used a small-scale model (1/20) made of wood with rollers in order to compare the dynamic analysis with experiment results. The law of similarity was applied for the validation of the scaled model. In order to construct a more realistic simulation model, the damping coefficient of the dynamic model was adjusted to 0.5 Ns/㎜ for the wood-to-wood contact condition based on the experimental results. Using this validated model, dynamic simulations were also carried out for containers of 20, 30, and 40 tons. The results showed that the reaction force of the roller guide was increased from 74.7 kN to 91.2 kN as the weight of container increased. For the design of a roller guide for SGS, the results obtained in this study can be used to reduce the reaction force by employing a rubber roller or a highly damped rotational joint.
대학체육 시간강사의 직무 스트레스와 직무 열의의 관계 : 극복력의 매개 효과검증
오태한(Oh, Tae-Han),김덕중(Kim, Duk-Jung) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.5
The purpose of this study was to verify the mediated effects of coping power in the relationship between job stress and job enthusiasm of college sports part-time lecturers. The participants were collected from 215 part-time lecturers majoring in physical education, either from a physical education college or from a liberal arts college, using the method of extracting snowballs. Survey tools were used by modifying and supplementing questionnaires used in prior research. Considering the characteristics of part-time lecturers, researchers and research assistants visited the data in person to collect the data considering the time and location of the participants of this study. The collected data were frequency analysis, factor analysis, correlation analysis, simple regression and multiple regression analysis through the SPSS statistical program, and the significance verification of indirect effects was utilized by the Sobel test technique. The results were as follows. First, job enthusiasm the job stress of college sports part-time lecturers had a negative (-) effect on job enthusiasm. Second, in the relationship between the job stress and job enthusiasm of a physical education-related part-time lecturer, the coping power was a complete mediated model. Through this study, it would be expected to derive various follow-up studies that could alleviate the job stress of college sports part-time lecturers and improve their job enthusiasm.
고영은(Young.E.Ko),오태일(Tae.I.Oh) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
The full-time 4WD(four-wheel-drive) vehicle which has a device to equalize the angular velocities of front and rear wheels always drives the whole wheels, while the conventional 4WD vehicle can drive four wheels by selection of the 4WD mode. The viscous coupling in full-time 4WD vehicle links the front propeller shaft to the rear one to rotate together, as well as permits them to have different revolution speeds in some ranges of the fluid friction. The ADAMs full vehicle model including the viscous coupling and the speed controller has been built to know the behavior of the full-time 4WD vehicle, and to verify the performance of the dynamic characteristics of it. Some simulation results of the acceleration and the cornering maneuver show that the full-time 4WD vehicle can improve stability and driveability in comparison with the conventional one.<br/>