• Hwankyungkyoyuk
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• v.21 no.2
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• pp.11-24
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• 2008

This research verifies the effect on environmental attitude and knowledge accomplishment by t-test as producing and running programs regarding global warming which is raised as a representative environmental issue subject to 6th grade-elementary students. For this, environmental education programs about global warming for elementary students are developed and applied 15 times by reconstituting classes based on the contents regarding global warming from the text books revised as of 7th course of study. The result is as below. First, some part of contents from social study and science of 6th grade elementary curriculum of 7th course of study was able to be reconstituted to 15 education programs. Secondly, the programs about global warming improved students' environmental attitude Application of the programs about global warming showed significant difference(p<.05) on building environmental attitude as it proved those are effective on both area of recognition level and practice level. The method used on the test had .866's Cronbach alpha modulus value therefore, it obtained reliability. Thirdly, the programs regarding global warming improved students' knowledge accomplishment. As a result of test for knowledge accomplishment which was executed with same method for attitude test, the application of the programs about global warming showed significant difference(p<.05) on improving students' knowledge accomplishment on the global warming therefore, it resulted that the application of the program is effective on knowledge acquirement.

• The Transactions of the Korean Institute of Electrical Engineers B
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• v.53 no.2
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• pp.82-89
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• 2004

In this paper, an active magnetic bearing(AMB) system is designed and controlled using a digital Proportional-Integral-Derivative(PID) control concept. The plant dynamics consisting of actuator and rigid rotor dynamics are described. A digital PID controller with a global control and a local control concept is designed and implemented using digital signal processor. Some experiments are conducted with each global control and local control concept. These include start-up test, impulse test, whirl response, and generator load test. The experimental results and comparison between those of a global control and a local control indicate that the global control of concept has impressive static and dynamic control performance for the prototype considered. From the whirl test, the developed system set can be controlled within about $\pm10\mu\textrm{m}$ gap variation at the rotational speed of 6000rpm and generate the AC power of frequency of $60\textrm{Hz}$, voltage of 100V and current of 0.8$\textit{A}$.

• Journal of Applied Reliability
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• v.5 no.2
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• pp.273-287
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• 2005

Accelerated life test models and procedure are developed to assess the reliability of Refrigerator door switch. The main function of door switch is to operate bulb lamp and fan motor in the refrigerating room. The accelerated life test method and test equipments are developed using the relationship between stresses and life characteristics of the products. Using the developed accelerated life test method, the parameters of the ALT model and life time distribution are estimated and the reliability of the Door S/W at use condition if assessed. The proposed accelerated life test method and procedure may be extended and applied to testing similar kinds of products to reduce test time and costs of the tests remarkably.

• Proceedings of the Korean Reliability Society Conference
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• 2005.06a
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• pp.327-337
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• 2005

Accelerated life test models and procedure are developed to assess the reliability of Door switch. The main function of door switch is to operate bulb lamp and fan motor. The accelerated life test method and test equipments are developed using the relationship between stresses and life characteristics of the products. Using the developed accelerated life test method, the parameters of the ALT model and life time distribution are estimated and the reliability of the Door S/W at use condition if assessed. The proposed accelerated life test method and procedure may be extended and applied to testing similar kinds of products to reduce test time and costs of the tests remarkably.

• The Korean Journal of Mycology
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• v.51 no.2
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• pp.141-146
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• 2023

Stem rot symptoms were observed in Gondre (Cirsium setidens) plants growing in a vinyl greenhouse in Taebaek, Korea during a disease survey in June 2022. The plants presented with dark brown to black rot on the stems at or above the soil line. Severely diseased plants displayed wilt and blight. Disease incidence among these plants ranged from 1 to 5%. Three isolates of Rhizoctonia sp. were obtained from the stem lesions of diseased plants. All isolates were identified as Rhizoctonia solani AG-2-2(IV) based on the morphological and cultural characteristics, results of the anastomosis test, and phylogenetic analysis. The pathogenicity of the isolates to Gondre plants was confirmed using an artificial inoculation test. The lesions induced by the inoculation test were similar to those observed in the investigated vinyl greenhouse. Here, we report a case of R. solani AG-2-2(IV) causing stem rot in Gondre.

• Journal of Advanced Navigation Technology
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• v.21 no.6
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• pp.601-607
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• 2017

This study performed fault test on global positoining system (GPS) carrier phase measurements, which is a preprocessing step to generate the positioning correction information based on the global navigation satellite system (GNSS) infrastructure. The existing carrier acceleration ramp step test (CARST) method affects the test result by using the mean value to eliminate the receiver clock error. In this regard, this study applied differencing and compared its results with those of the existing CARST. The fault simulation that applied artificial faults to the actual data found that the fault could be detected independently on each satellite when difference method was applied, and the single difference CARST and the double difference CARST produced similar results. The comparison with the existing method using actual data demonstrated the strengths and weaknesses of satellite and station single difference. Nevertheless, it is our understanding that it would require an additional analysis to determine whether the results were affected by the satellite or receiver clock error.

• Journal of Digital Convergence
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• v.16 no.9
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• pp.347-357
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• 2018

The purpose of this research is to investigate the relationship between global citizenship, self leadership and global health competencies in nursing students and utilize the basic data for development of educational program to increase of global health competence. A convenience sample of 207 subjects were invited from three university. Data were analyzed using t-test, ANOVA and Pearson's Correlation with SPSS PC 18.0 program. Global health competencies showed that there were differences according to religion, taking education related to global health competency, exposure to mass media about global health. There were a significant positive correlation of global citizenship(r=.364, p<.01), self leadership(r=.372, p<.01) and the global citizenship of nursing students showed a significantly positive correlation of self leadership(r=.463, p<.01). Therefore, on the result of this study, when we develop the educational programs to increase the global health competencies for nursing students, we have to include global citizenship and self leadership.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.40 no.12
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• pp.2419-2426
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• 2015

Named Data Networking (NDN) is one of the powerfully evolving future internet architectures. In this paper installation, configuration and several tests are addressed to show how well and properly our NDN testbed have been prepared and established using NDN platform, in order to have interoperability with global NDN testbed. Global NDN testbed status with our NDN node participation was addressed. To verify one reachability on the NDN connection to global NDN testbed, a latency result is presented using NDN ping test.

• The Journal of the Korea Contents Association
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• v.22 no.10
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• pp.383-391
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• 2022

This study was aimed at investigating relationship between global health nursing competency and multicultural acceptance of nursing students. The subjects were 145 nursing students from a university, and data were collected from June 8 to 19, 2020. The data were analyzed using descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient, and regression. The subjects' global health nursing competency was 2.81±1.11 points (four-point scale) and multicultural acceptance was 3.84±0.68 points (six-point scale). Global health nursing competency differed according to gender and degree of preparation as a global nurse, and multicultural acceptance differed according to gender, multicultural education experience, and degree of preparation as a global nurse. Global health nursing competency had a positive correlation with multicultural acceptance (r=.18, p=.027), and it was showed that multicultural acceptance affected global health nursing competency (B=.29, p=.027). To be prepared as a global nurse, it is necessary to enhance the global citizen insight about multicultural experiences.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2005.10a
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• pp.324-328
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• 2005

Lactic acid bacteria are dominant microflora in fermented kimchi. In this study, lactic acid bacteria were isolated from 5 kinds of fermented kimchi and determined their physiologic property. Total 64 of LAB were isolated from kimch samples. In this study, 8 strains of them were selected by pH and bile salt tolerance test. HFI 58, HFI 40, and Yeulmu E strain had significant cholesterol lowering effect in vitro test. These were made of special feed of chicken by WooJin B&G. A Diet was tested for 5 weeks. The feed of special material supplement HFI58 groups had significant lower cholesterol concentration in egg yolk.