• Proceedings of the Korea Water Resources Association Conference
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• 1989.07a
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• pp.145-152
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• 1989

• Korean Architects
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• s.581
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• pp.126-129
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• 2017

• KOREAN POULTRY JOURNAL
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• v.42 no.7
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• pp.90-91
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• 2010

• Journal of the Korean Chemical Society
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• v.63 no.3
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• pp.166-182
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• 2019

This study examined teachers' difficulties that they encountered free semester science assessment and their problem solutions. Fifteen science teachers who had experiences of free semester teaching and assessment were selected by convenience sampling in this study. The participant teachers mentioned difficulties of accurate scoring in student self/peer assessment and suggested solutions of providing studetns with detailed assessment criteria and opportunities to practice assessment. The participant teachers mentioned a lack of objective assessment criteria for affective domain and suggested solutions of providing criteria prior to assessment and developing assessment framework. The participant teachers mentioned a lack of assessment tools and references for perforamnce assesement. The participant teachers mentioned difficulties of a large teacherstudent ratio for providng feedbacks to students and suggested solutions of decreasing teacher-student ratio and teaching load. The participant teachers mentioned difficulties of identifying student characteristics for assessment reporting and suggested solutions of decreaing teacher work load. The participant teachers mentioned a lack of teacher understanding of process based assessment and inactive attitude to performance assessment and suggested solutions of professional learning community and improving teacher perceptions on performance assessment. The participant teachers mentioned difficulties of a large teacher-student ratio and a lack of time for implementing assessment methods that they learned from professional development programs. With both teacher self-efforts and systematic support, these problems would be solved and success of free semester assessment would be achieved.

• Journal of the Institute of Convergence Signal Processing
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• v.11 no.1
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• pp.74-79
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• 2010

Many control techniques have been purposed in order to improve the control performances of the control system. The freedom on control in the control system is decided by the number of the closed-loop transfer function which can adjust independently. The design method of the controller with two degrees of freedom(TDOF) is used extensively for following the desired value and rejecting the disturbance. In this paper, the control system with the disturbance observer(DOB) for rejecting the disturbance is transformed by the control system with TDOF and the rejection of a transient response is easy at the starting time and load variation. The design method of the DOB is proposed in the frequency-domain and the control system with TDOF is constructed by using the DOB which is designed with this method. Through the simulation results, the usefulness of the proposed algorithm is proved.

• Journal of the Korean Society for Library and Information Science
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• v.34 no.1
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• pp.243-264
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• 2000

It is the aim of this study to attain general knowledge of Intellectual freedom which provides the philosophical principle of our library activities. Also, this study seeks to develop the principia of intellectual freedom as the policy and guide of public libraries in Korea. In order to research the operational circumstances of intellectual freedom In our public libraries, the researcher visited 20 public libraries in the Seoul district. The results clearly confirmed the self-censorship of the librarians in selecting materials. Also, it confirmed the reality of external interventions and restrictions as well as restrictive sources originating from internal ignorance and habitual practices in our public libraries. Ultimately, such results provided a solid basis for the aim of this study to develop intellectual freedom principle as the basic ideology for public library activities in Korea.

• The Journal of the Convergence on Culture Technology
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• v.1 no.1
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• pp.27-36
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• 2015

The purpose of this research is to try to enrich human life by applying the convergence energy of humanities and science to modern poetry. "Communication and entertainment", as modern poetry with modernist aesthetics, must indulge people's lives, which is simply to live happy lives. Entertainment is especially crucial because it is a method through which people can lead humane and satisfactory lives. The prerequisites for achieving this are true liberty and happiness. If these two prerequisites derive from humanity's consciousness, "communication and entertainment" can be born from "convergence of information technology and modern poetry", as the author insisted.

• Journal of Navigation and Port Research
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• v.27 no.5
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• pp.451-458
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• 2003

A ship with small metacentric height or high speed vessel performs relatively large roll angles in her manoeuvring motion. Roll coupling effect should be taken into consideration for accurate prediction of manoeuvring motion of such a ship. This paper proposes a new mathematical model of ship manoeuvring motion taking coupling effect of roll into consideration. Some kinds of manoeuvring motion are simulated by computer, based upon the proposed model. The simualted results by proposed model here are compared with those by existing model. The proposed model is found to be practical and useful for prediction of manoeuvring motion with roll effect.

• The Journal of the Convergence on Culture Technology
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• v.2 no.1
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• pp.45-51
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• 2016

Aristotle said 'Poet is that from who can give happiness, therapeutic effects to the reader.' He say to 'mimoumenon' it means a native Image restored. However, Kant said that Aesthetic is requested not only reappearance but freedom. This result is that between joyful freedom and reason of the judgement of tasted feeling. Because Art ever created is the spirit of the moral ideals, and those who combine the best of the joy. I think need to more communication and joy than their theories. For poet is replaced to be communicated and joyful for our happiness and freedom.

• Nuclear Engineering and Technology
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• v.24 no.3
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• pp.311-318
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• 1992

During mid-loop operation of Nuclear Power Plant, to prevent the Decay Heat Removal System (DHRS) from failure due to air entrainment of free surface vortex in the piping system, a set of simulating experiments was performed. Through these experiments, a relation between the non-dimensionalized numbers, such as H/d, Froude number, Reynolds number, was found. It was also found that the perturbation of the system by the disturbance such as pump start, valve operation, etc., has a strong effect on the free surface vortex. Furthermore, from viewpoint of reactor safety, a modified inlet device which is reducer type is strongly recommended for the prevention of air entrainment into DHRS.