• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.26 no.8
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• pp.635-639
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• 2013

Generating output characteristics of a EYE-type piezoelectric generator depending on ceramic size and materials of the elastic body were studied. EYE-type piezoelectric-generating device consist of the ceramic was attached between the both elastic body. piezoelectric-generating is that if the tension occurred at both ends of an elastic body, the piezoelectric effect occurs at ceramics through the form change of the elastic body. The structure of this EYE-type generator use various area. than a existing type generator, because the ceramic position of the directly force at does not apply. Resonance and output characteristics of the generator were analyzed by using FEM program. Generators were fabricated on the basis of analyzed results and attached on a frequency controllable vibrator to measure output characteristics. Also, the experimental results were compared with the simulated results. As a result, output characteristics of the generator increased depending on the increase in ceramic thickness. In case of increase in ceramic width, resonance frequency of the generator also decreased.

• Korean Journal of Clinical Laboratory Science
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• v.46 no.2
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• pp.54-58
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• 2014

This study aims to understand some related types (to DiSC behavioral ones) through an analysis about DiSC behavioral types of freshmen at the clinical pathology department in the University. In order to do that, a total of 34 male and female students were surveyed. General characteristics and DiSC behavioral types for the targeted students were analyzed for frequency and percentage. For the frequency, the Chi-square test was performed and the level of significance was set to p<0.05. For the elements to select the university at general characteristics from the result of this study, 21 students were found to have selected the university voluntarily (61.8%). For the information about the clinical pathology department, 14 students were found to be informed through media (41.2%) and 7 students were informed through their parents (20.6%). For the DiSC behavioral types of the students majoring in clinical pathology, 18 students were found to be I type (53.0%), 8 students were C type (23.5%), 5 students were S type (14.7%) and 3 students were D type (8.8%). The relevance between general characteristics and DiSC behavioral type were found to be insignificant. As this study is aimed, there is no significant relevance between general characteristics and DiSC behavioral types, but through an understanding of characteristics of the students majoring in the clinical pathology, helping freshmen who are taking their first steps to adapt themselves to a new environment by diagnosing and understanding their behavioral types, understanding behavioral styles of those four types and guiding them in a positive direction, the method should be considered to raise their satisfaction about the major.

• Journal of the Korean Society of Costume
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• v.55 no.5 s.95
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• pp.65-77
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• 2005

This stuffy is to understand the symbolic meaning of Korean traditional animal Patterns, to analyze their figurative characteristics focusing on fabric relics of Chosun Dynasty, and to search their internal beauty as well as their external beauty. Animal patterns can be classified as Individual type, the type that only animal patterns are used, and Compound type, the type that animal patterns are used with other patterns. The Individual type was not found at all. Only the Compound type, compounded with two or three other patterns, were found. Among the other patterns used in the Compound type, botanical patterns and heaven-and-earth-shaped patterns were the majority while letters patterns were rarely used. Bird patterns take enormously large part of the animal patterns. In terms of the arrangement, animal patterns are classified as Dense type, Sparse type, and Picturesque type.'rho three types are almost equal in their quantity. Picturesque type is found comparatively a lot. Animal patterns are much more frequently used in female clothes than in male clothes. For female clothes, they are mostly used in some parts of the clothes with ornamental effect. But, for male clothes, they are mainly used all over the fabric by weaving animal patterns on it. Not just their external beauty, animal patterns have also internally beautiful characteristics, such as keeping away from wicked ghosts, hoping for good luck, emblematic features, having ideological meanings, and so on.

• Journal of architectural history
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• v.19 no.5
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• pp.7-23
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• 2010

The aim of this study is to analyze the planar composition of rectangular formation houses in 8 areas, both cities and counties, in the sphere of Andong and to reveal the characteristics of these houses in each region. This study of the rectangular formation of houses and their characteristics will facilitate an understanding of the general trends of housing in Andong cultural area.. In this study, the subject houses are composed of three parts: Bonchae, Anchae, and Sarangchae, and the author classified the planar types of the houses. The differences in the regional planar types were analyzed through visual and statistical methods. The analyzed results reveal the regional characteristics of the rectangular formation houses in terms of their planar aspects in the Andong region. The distribution showed the greatest preference toward one type out of two types of distribution of Bonchae, Anchae, and Sarangchae. The ratio for the higher distribution was approximately 70%, whereas the ratio for the lower distribution was around 20%. For convenience, the type with a higher distribution rate is referred to as the "major type," and the type with a lower distribution rate is termed the "minor type." The complete-type houses (73%) in Bonchae were a major type there, and the symmetric-type houses (73%) in Anchae were the major type in that location. In addition, the corner-type houses (72%) in Sarangchae were the major type. In the regional distribution of major types and minor types in the 8 regional cities and counties, regional differences were noted. The three regional groups can be divided into A, B, and C according to the distribution ratio. Andong, Bonghwa, and Yecheon belong to region A. that shows a variety of distribution types and a dispersive trend. Yeongyang and Yeongdeok belong to region C that shows a simplified trend.Yeongju and Cheongsong belong to region B.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.54 no.3
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• pp.133-138
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• 2005

This paper presents a characteristics of horizontal swing angle in V type suspension string sets for 765kV T/L. The design of V type suspension string set does not differ from that of general string set for general towers, but it prevents instabilities from swing motion by the horizontal angle and by the wind pressure. We were designed specially 6 conductor yoke, arcing horn and earth horn. And we were decided to 550mm for a distance of strings. We were carried out characteristics of horizontal swing test and movement of mass center test for V-string sets of 400kN single, 300kN double and 400kN double. This products will be used for 765kV T/L of 1 circuit in suspension towers.

• Journal of the Korean Ceramic Society
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• v.25 no.4
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• pp.309-314
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• 1988

In this study, the effect of the size of sintered body on resonant and filter characteristics in Pb(Sn1/2Sb1/2)O3-PbTiO3 piezo-electric system were investigated. The attenuation characteristics of ring-dot type and ladder type filter were also investigated. As the size of sintered body was decreased, the resonant characteristic(Fr, Fa) and the center frequency(Fo) were increased. As the poling field was increased, the Kp and bandwidth were increased. The big difference between rign-dot type and ladder type was the sharpness of bandwidth, selectivity and the movement of center frequency.

• Proceedings of the KSME Conference
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• 2004.11a
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• pp.274-278
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• 2004

This study investigates the fatigue characteristics of SM 490 A material specimens for the railway vehicle due to the welding type. The more stress ratio decreases, the more strength of fillet welded specimen decreases. At speciallly, when the stress ratio of TN(Plate with transverse fillet welded rib) specimens decreases 0.5, 0.1, and -0.1, the fatigue limit decreases unifomly. The strength of TN is higher than it of NCN in the compare of fillet welding type, but the strength of NCN(Non load-carrying cruciform fillet welded joint) is higher than it of CN(Load-carrying cruciform fillet welded joint), which these specimens have the rib in the both side. We analysis the strains on the weld positions of the TN specimens during the fatigue test for the investigation of crack initiation and crack growth. In the theses results, we could find the fatigue crack initiation point and time.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.10 no.1
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• pp.80-86
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• 2011

This study compared and analyzed manual tapping and automatic tapping regarding tapping process characteristics of titanium hard-to-cut-material. Tapping process characteristics of titanium hard-to-cut-material are evaluated as the quality of a screw, wear of a tap, economic analysis, and cycle time etc. The type of screw threads after manual tapping is formed as an irregular type of screw threads, and perfect screw threads are created after automatic tapping. In addition, the chip type after manual tapping process is formed as the discontinuous chip due to work hardening, and the powder type of chip after automatic tapping process is created. In terms of cycle time, an automatic tapping process is shortened by 70% compared to manual tapping process. Insert tip wear of an automatic tapping shown in the process of 5-hole tapping is not found, but hand tap wear for finish cutting is most severe.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.10a
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• pp.227-230
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• 2004

A self-compensated water-hydrostatic bearing has advantages in bearing stiffness. In this paper, the mechanism is applied to hydrostatic journal bearing for achieving the high bearing stiffness. The finite element method is applied to analyze the load characteristics of the self-compensated journal bearing. From the analyzed results, it is confirmed that though the self-compensated journal bearing has higher load capacity and stiffness than conventional fixed capillary journal bearing, the merit is decreased in the case of high eccentricity, that is, a spindle system with self-compensated journal bearing must be designed to have the load capacity large enough. For improving the practicality, a rectangular type capillary is introduced and discussed. Theoretically analyzed results show that it has more advantages than the conventional annular type capillary in the practical usage. The experimental verification on the analysis method is performed, and the experimental results show good agreement with theoretical results.

• Journal of the Korean Society for Precision Engineering
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• v.12 no.3
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• pp.23-31
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• 1995

The sending characteristics of the non-contact type displacement transducers can affect the performances of the magnetic bearing systems when they support the rotating shaft. The probe type displacement sensor detects not only the displacement of the rotor at the sensing position but also the surface irregularitis of the rotor such as surface roughnessand roundness errors. If there exist such measuring errors, the magnetic bearing can not apply proper force against the rotor displacements for the detected signal is the input to the magnetic bearing controllers. The cylindrical shape capacitive transducer can detect the rotor displacement by the integral sum of the charges which are formed between the sensor plates and rotor so that it can reduce the detecting errors induced by the surface irregularities of the rotor. By theore- tical analysis, we compared the sensing characteristics of the cylindrical shape capacitive transducers for the rotors that have some sinusoidal irregularities with that of the ideal probe type displacement transducers.