• Transactions of the Korean Society of Machine Tool Engineers
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• v.17 no.6
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• pp.97-103
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• 2008

In this paper, the Post Process for the manifold complex processing using CAD/CAM Software of two and a half Dimensions(2.5D) has been developed to maximize the application of the manifold manufacturing machine. Many companies are currently making use of high price systems to improve manufacturing process using the multi-axial complex manufacturing machine. In accordance with the requirements, the utilization of CAD/CAM Software for the manifold complex manufacturing machine is earnestly demanded. However, the experts who have experience in manifold manufacturing machine are insufficient. Consequently the outcomes of the Post Process for 2.5D CAD/CAM Systems have been dealt in order to be smoothly operated by those who have basic skills and be understood in process drawings. CNC program functions can be specially used as they are, when drawn up. The Post Process for the original point designation and transformation of coordinates has been developed and applied. The results gave proof of practical manufacturing outcomes.

• Computers and Concrete
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• v.2 no.2
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• pp.165-176
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• 2005

This paper discusses 2D lattice models of beams for simulating the fracture of brittle materials. A simulation of an experiment on a concrete beam subjected to bending, in which two overlapping cracks occur, is used to study the effect of individual beam characteristics and different arrangements of the beams in the overall lattice. It was found that any regular orientation of the beams influences the resulting crack patterns. Methods to implement a wide range of Poisson's ratios are also developed, and the use of the lattice to study arbitrary micro-structures is outlined. The crack patterns that are obtained with lattice are in good agreement with the experimental results. Also, numerical simulations of the tests were performed by means of a lattice model, and non-integer dimensions were measured on the predicted lattice damage patterns.

• Journal of the Korean Society of Marine Environment & Safety
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• v.5 no.1
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• pp.37-45
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• 1999

In the decision of a collision avoidance action for navigators and intelligent ships, it is necessary to evaluate the degree of surrounding risks and to control them effectively. In this paper, we propose the new methodology for navigational risk evaluation and control at sea. In the methodology, navigation risk is evaluated in two dimensions using Even Risk Contour on the basis of the concept of contour line. In addition, the movement information of dangerous targets is assessed continuously and precisely with wide band data. The presented technique is useful for the safety navigation at the heavy traffic sea and will be applied for the ultra automatic ship.

• Earthquakes and Structures
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• v.15 no.2
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• pp.165-178
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• 2018

The aim of this study is to investigate the efficiency of using threaded rods and steel profiles to produce a steel confining system for rehabilitation of damaged concrete corbels for the first time in literature. Some of the specimens were repaired by crack repair epoxy before being confined for further enhancement. A total of 19 two sided damaged corbels were used in the study with different mechanical properties and parameters but similar dimensions. The differences were in rehabilitation style, shear span, fiber percentage, reinforcement steel diameter, and concrete strength. The rehabilitated specimens were loaded with vertical load until failure. Four different configurations were used in the investigation. Test results show that the proposed rehabilitation technique is effective to enhance the load capacity of the corbels and to improve their ductility. Moreover, new formulations were proposed to calculate the load capacity of the rehabilitated corbels. A good fit was observed between numerical and experimental results.

• 제어로봇시스템학회:학술대회논문집
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• 1990.10b
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• pp.1150-1155
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• 1990

This paper proposes an optimal redundancy resolution of a kinematically redundant manipulator while considering homotopy classes. The necessary condition derived by minimizing an integral cost criterion results in a second-order differential equation. Also boundary conditions as well as the necessary condition are required to uniquely specify the solution. In the case of a cyclic task, we reformulate the periodic boundary value problem as a two point boundary value problem to find an initial joint velocity as many dimensions as the degrees of redundancy for given initial configuration. Initial conditions which provide desirable solutions are obtained by using the basis of the null projection operator. Finally, we show that the method can be used as a topological lifting method of nonhomotopic extremal solutions and also show the optimal solution with considering the manipulator dynamics.

• Bulletin of the Korean Chemical Society
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• v.31 no.9
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• pp.2565-2570
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• 2010

The orthorhombic $MgB_2C_2$ structure contains well-separated parallel graphite-like $B_2C_2^{2-}$ layers which extend infinitely in two dimensions. Three possible ways to distribute B and C atoms in the hexagonal sublattice sites are adopted. Band structures for the hypothetical distribution patterns are examined to assess the electronic stability of these phases and to account for the observed arrangement by means of extended Huckel tight-binding calculations. The preferred choice is the layer with B and C alternating strictly so that B is nearest neighbor to C and vice versa. A rationale for this is given. Due to the alternation of B and C within the honeycomb layers, $MgB_2C_2$ is a band insulator, which through partial substitution of Mg with Li, is predicted to turn metallic with holes in the $\sigma$ bands at the Fermi level.

• Journal of the Ergonomics Society of Korea
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• v.1 no.1
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• pp.23-27
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• 1982

This study analyzes jow reciprocal relations between the temperament and motivation of managers interact. To know the relationships between achievement motivation and affiliation motivation, this study examines whether or not affiliation-achievement motivation and nonaffiliation-achievement motivation mani- fested in manager group of Jpapn are present in this tested group. Data were obtained by testing 578 male- managers employed in domestic enterprise with Y-G Character and Motivation Test. Structure Vector obtained and applied Canonical Correlation Analysis method is applied as a means to interpret it. From the study, the following results are obtained: First, the affiliation and nonaffiliation-achievement motivation appear in domestic sampled group. Second, the manager with affiliation-achievement motivation is shown to have extroversive character, high-social accommodation, high-emotional stability, whereas the one with nona- ffiliation-achievement motiviation to have introversive character, somewhat low-social accommodation and low- emotional stability. Whether or not these results reappear in the bilingual group remains to be studied further.

• Journal of Fisheries and Marine Sciences Education
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• v.26 no.4
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• pp.717-735
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• 2014

This study aims to develop and validate the WSSECT (Workplace Spirituality Scale for Early Childhood Teacher) through literature review and statistical tests. The initial version with 40 items based on two dimensions of spirituality in individual and professional level was constructed. Then, it was revised twice for improving reliability and validity. Finally the WSSECT was constructed of 4 factors - i.e. 'calling for ECE teacher job', 'meaning for life', 'membership in educational community' and 'awareness of inner life' - including the 23 items. The scale will be expected to identify workplace spirituality of early childhood teacher.

• Journal of the Korean Society of Clothing and Textiles
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• v.20 no.1
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• pp.207-217
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• 1996

Self is well·expressed by clothing, so self-image can be an effective variable for conducting clothing·behavior studies. But there ate some problems in clothing and self-image researches. This paper will be a clue to discuss these problems. The contents of this study are as follows. (1) The notion of self-image is compared with self-concept, and according to this work, self concept comprehends the evaluative properties in addition to self-image illustration. In tai.; part, the problem in translating the terminologies, 'self-concept' and 'self-image', are also discussed. (2) The aspects of self-image are explored, thus physical and social-psychological aspects are determined. (3) Two sub-dimensions of self-image ate recommended relating to clothing researches: actual versus ideal and intrinsic versus phenomenal. (4) Some comments for future studies ate added. It is needed to investigate the relationships of other social- psychological variables and self-image in clothing department.

• Health Policy and Management
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• v.13 no.1
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• pp.46-68
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• 2003

In the model tested here, individual innovative work behavior is considered as the outcome of two antecedent factors-empowerment and organizational supports. The relationships between those variables and innovative work behavior are analyzed form the data collected through a questionnaire survey of 389 employees in five general hospitals. Results of multiple regression analyses show that three dimensions of empowerment-meaning, competence, and impact, and supports from organizational culture have significant effects on innovative work behavior whereas the effects of choice dimension of empowerment and managerial supports are not significant. These results emphasize the importance of empowerment and innovation oriented organizational culture for individual members' innovative work behavior. Theoretical and practical Implications and suggestions for future research are discussed.