• 제어로봇시스템학회:학술대회논문집
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• 1991.10a
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• pp.974-978
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• 1991

Electro-pneumatic valve is an electro-mechanical device which converts electric signal into pneumatic flow mu or pressure. A measurement of dynamic response time is very important to evaluate valve performance. Dynamic response time of electro-pneumatic valve has a variation accordance with valve types, operating way and test standard. In this study, automatic measurement system of dynamic response time is composed based on test condition of dynamic response time test standard(CETOP, JIS). Also, in this study test pressure variation characteristics accordance with variation of solenoid excitation power, and we developed dynamic response measurement system enable to compare of and analyze these two characteristics.

• Proceedings of the KSR Conference
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• 2009.05a
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• pp.746-755
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• 2009

This study will analyze the data of Kyongbu & Honam Line whether how much the weather change has an effect on the change of transportation modes and check the pattern of customer's behavior and investigate the influence on the changing transportation modes. Especially, this study will confine to the rainfall and snowfall out of various weather causes, and the questionnaire investigation is used to know the sensitivity of customer's patterns selecting transportation modes in accordance with weather change, and the research result will be used to make a marketing strategy & efficient train operation.

• Proceedings of the KIEE Conference
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• summer
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• pp.854-856
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• 2004

Electro mechanical type protective relay have an influence on the characteristics of the operation due to the change of coil impedance in accordance with the change of the temperature. We found out through an electrical test how many characteric changes are made when we change the temperature according to the types of protective relay. The result is that the protective relay operated by vactor is influenced by temperature.

• The monthly packaging world
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• s.121
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• pp.142-146
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• 2003

• Journal of Oral Medicine and Pain
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• v.12 no.1
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• pp.85-93
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• 1987

The author studied on the effect of TMJ sounds to the patterns and ranges of mandibular border movements in horizontal plane with Pantograph (Denar Corp.). For study, 19 patients with TMJ sounds only and 16 students with no TM disorder were selected and classified as experimental group and control group, respectively. The subject performed right lateral movement, left lateral movement, and forward movement. Each movement were performed 3 times and the movement trajectory obtained with mechanical pantograph were observed for accordance of centric relation position, reproducibility and/or restriction of lateral movement paths, deviation of protrusive path in anterior table, restriction of protrusive condylar movement path in posterior horizontal table, presence of Fisher angle in posterior vertical table. And pantographic reproducibility Index (PRI) were obtained with pantronic by the same movement method as in the mechanical pantograph record. The obtained results were as follows : 1. In experimental group, PRI scores in those who show accordance of centric relation position were 14.4, and were 26.53 in those who did not show accordance of centric relation position. However, the PRI scores of the two subgroups show no statistically significant difference in control group. Therefore, in experimental group, the capability of accordance of centric relation position affected largely the PRI scores than in control group. 2. Deviation of protrusive path was opposite to the affected side in experimental group, and was left side in control group. 3. Restriction side of condylar movement in protrusion was ipsilateral to the deviation side in experimental group, but in control group, restriction side was not related to the deviation side. 4. PRI scores in experimental group were 23.2 (moderate dysfunction category), and in control group, were 17.8 (slight dysfunction category). The PRI scores in control group, however, implies that the evaluation of temporomandibular disorders by the PRI scores only may be unreasonable.

• Journal of Technologic Dentistry
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• v.33 no.4
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• pp.479-493
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• 2011

Purpose: The career education of the college student needs a new awareness. This research provides fundamental data from analyzing necessities of student's career education according to plans of a career education. Methods: Make use of SAS 8.0 of windows and descriptive statistics analysis on investigate Dental Technology 570 students in Daegu. And also it analyzes difference of ispectable t-test and ANOVA. Results: According to a gender, a job experience, where they are come from, there is a meaningful difference of an information and an entrance motive for choosing a major (<.05). The time of choosing the major are different meaningfully (<.001). An awareness about the method of a career achievement is a meaningful difference between men and women(<.05). As getting old, the method of a career achievement is higher and there are meaningful differences according to a grade, job experience and a entrance screening(<.01). In accordance with a gender, a grade, entrance screening, there are meaningful differences of a degree for obtaining the career information activities(<.01). In accordance with an age, when they choose a major, there is a difference(<.001). In accordance with a gender and a age, there are meaningful differences of a career plan(<.001). The age difference is slight. In accordance with a gender and a age, there are meaningful differences how to effort for the career(<.001), and also according to an entrance screening, an entrance motive(<.05). These mean that the first priority for choosing the career and going into the world is a school record. There are meaningful differences of people that the student choose for consulting the career(<.01). According to the job experience there are meaningful differences(<.001). Conclusion: By investigating and analysing the student's career plan, we need to seek how students choose their career reasonably and desirably. And also we need to teach a career education systematically.

• Journal of Engineering Education Research
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• v.19 no.4
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• pp.14-23
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• 2016

This study is to analyze the team interaction in accordance with the team size. Thereby, it is to reveal the team size for the attainment of the effective team interaction and the specific goals to achieve the purpose of this study are as follows. Firstly, the frequency and percentage of team interaction in accordance with the team size are presented. Secondly, the statistical verification of the team interaction in the social emotional area is conducted. Thirdly, the statistical verification of the team interaction in the task area is conducted. In order to do this study, we explain the purpose of study, confidentiality, and withdrawal right were described and then 32 persons who agreed to participate were selected as the subjects for the study. After that, the autonomous organization of team was induced and a total of 8 teams were organized - 3 teams comprised of 3 members, 3 teams of 4 members, 1 team of 5 members, and 1 team of 6 members. Further, Bales' (1950) Interaction Process Analysis (IPA) was used in order to analyze the team interaction, and Mangold INTERACT was used as a coding program. The results of study are as follows. Firstly, the highest frequency of the team interaction showed up in the case of five or six members and the lowest in the case of 3 members. Secondly, a statistically significant difference in the social emotional (positive) area showed up in accordance with the team size and the team organizations of three or four members were effective. Thirdly, a statistically significant value in the answer area showed up in accordance with the team size and the team organizations of five or six members were effective.

• International conference on construction engineering and project management
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• 2015.10a
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• pp.704-705
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• 2015

Recent research has been ongoing for modular buildings in the country, and interest increases. However, in accordance with legal restrictions in the country with regard to Project Delivery system of Modular Building, the activation of modular buildings industry is obstructed. In Korea, in accordance with national contract law, the construction contract is apply to the project delivery system of modular buildings, and in accordance with Framework Act on the Construction Industry, The project delivery system of modular buildings has to be a separate order. The definition of separate order in contract as defined in the law is that the electric work and Communication work and digestion facility work has to be separate each contract in order to be ensured professionalism. In accordance with law, the project delivery system of modular buildings is that the contract for construction is concluded with the Owner and the Construction Contractor and the contract for goods is concluded with the construction Contractor and modular manufacturer. Due to these project delivery system, the domestic factory production rate when making a modular unit is significantly reduced compared to the rate of factory production abroad and the domestic factory production rate is estimated to 10-20%. Due to the factory production rate is also low, despite what can be done at the factory the workload in construction field increases. According to the workload in field increases, the effect of the schedule reduction can be reduced. It resolved to form a consortium with a modular manufacturer and construction companies or the contract is concluded with Owner, modular manufacturer and construction companies in each. In this paper, we propose a specific project delivery system for modular building to solve the problem of the low factory production rate and the problem of schedule reduction. Through this paper, due to the variety of project delivery system on modular buildings is expected to contribute to the activation of modular buildings.

• Journal of Korea Society of Industrial Information Systems
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• v.28 no.6
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• pp.173-187
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• 2023

This study aims to determine whether ESG performance positively affects foreign ownership for listed firms that publish sustainability reports. Furthermore, we test whether the disclosure of environmental information in the sustainability report in accordance with the TCFD recommendations moderates the relationship between ESG performance and foreign ownership. The results of the empirical analysis are as follows. First, there is a positive correlation between ESG performance in a given year and foreign ownership in the following year, i.e., the higher a firm's ESG performance, the higher its foreign ownership. Second, the presence of environmental disclosure in accordance with the TCFD recommendations positively moderates the relationship between ESG performance and foreign ownership, i.e., environmental disclosure in accordance with the TCFD recommendations strengthens the positive relationship between ESG performance and foreign ownership. In conclusion, this study shows that foreign investors invest more in companies with better ESG performance, and the effect is stronger for companies that disclose environmental information in accordance with TCFD recommendations.

• Journal of the Korean Society of Clothing and Textiles
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• v.23 no.6
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• pp.800-808
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• 1999

The demand for PU coated synthetic leather is increasing as a high fashion material. But it has some faults of water vapor permeability surface tacky property and static electricity. Therefore the purpose of this study was the produce of PU coated fabric added collagen with hydrophilic property and soft touch. In the PU coated fabric water vapor permeability water vaper absorption and frictional electronic voltage were investigated surface bending and compression properties were also examined by the use of KES-FB System. The followings were the results of this study. 1. There was no Cr in the collagen so that Cr was not treated in the collagen. 2. The surface and cross sectional layer of PU coated fabric with collagen were highly developed by micro porous structure. 3. The water vapor permeability of PU coated fabric was increased as collagen concentration increased. 4. The water vapor absorption of PU coated fabric was increased as collagen concentration increased. 5. The frictional electronic voltage of PU coated fabric was decreased in accordance with the increase of collagen concentration. Especially it effectively decreased by the use of only 5% collagen concentration. 6,. The bending and compression properties of PU coated fabric were increased in accordance with the increase of collagen concentration so that it became stiff. 7. The Value of MIU, SMD was decreased in accordance with the increase of collagen concentration so that the PU coated fabric became smooth.