• Journal of The Korean Association For Science Education
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• v.10 no.2
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• pp.1-9
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• 1990

For the purpose of diagnosing the problems in inquiry instruction and evaluation in secondary schools of Korea, an inquiry achievement test and a questionnaire were administered to a sample of 127 science teachers and 610 junior high school students. The analysis of the results served to the clarification of broo:J. range of problems concerning inquiry teaching. Based on the data gathered and analyzed in this study, the major suggestions are as follows. 1. The content of science textbooks must be diminished, and be written for easier understanding. 2. Science instruction and entrance exams must be changed from content-oriented to inquiry-oriented. 3. Effective teacher education program regarding inquiry teaching and evaluating method must be developed and performed.

• Journal of computational fluids engineering
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• v.2 no.2
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• pp.80-88
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• 1997

A new wall impaction model for diesel spray is described in this paper. The gas phase is modelled in terms of the Eulerian continuum conservation equations of mass, momentum, energy and fuel vapour fraction. The liquid phase is modelled following the discrete droplet model approach. The droplet parcel contains many thousands of drops assumed to have the same size, temperature and velocity components. The droplet parcel equations of trajectory, momentum, mass and energy are written in Lagrangian form. The new drop-wall interaction model is proposed, which is based on experimental investigations on individual drops, and it is applied for the general non-orthogonal grid. The model is then assessed through comparison with experiments over a wide range of test conditions of sprays. The results are in good agreement with experimental data.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.17 no.32
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• pp.17-26
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• 1994

This paper deals with the estimation of limiting distribution parameters, which have a close relation with product reliability characteristics in reliability test. Among the many kinds of estimation methods, probability paper is commonly used. The limiting probability paper is very convenient, but it has a great disadvantage in estimation accuracy by plotting method. It is very difficult to get the same results even if one use the same data several times. A computer program for the regression method is used for the parameter estimation to reduce these errors. Especially, the computer graphic program was written in GW-BASIC 3.22 language and a couple of running examples for user's reference appears in the appendix part.

• Hwankyungkyoyuk
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• v.25 no.2
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• pp.254-271
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• 2012

The purpose of this study was to analyze water words written by college students in order to investigate their cognition by using 'contents of water education for sustainable development'. For this study, researchers applied qualitative analysis methods such as a mind map and a water word association test, as well as quantitative analysis methods including a water common sense quiz and a survey of water cognition. The results of this study were as follows; First, college students were rarely interested in water, since the score of a water common sense quiz was quite low; water cognition that college students felt in their daily life was also deficient. Second, college student data shows that while they had specific water cognition, they did not have integrated view of water. Therefore, the study on water cognition of balanced views related to water should be carried out through developing and appling a interdisciplinary subject.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 1995.03a
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• pp.147-154
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• 1995

In this paper, a computer-aided design system for axisymmetric deep drawing process will be described. An approach to the system is based on the knowledge based system. The system has been written in AutoLISP with personal computer. The system is composed of four main modules, such as input , geometrical design, test & rectification and user modification . The system which aids designer provides powerful capabilities for the design of axisymmetric deep drawing process.

• The Bulletin of The Korean Astronomical Society
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• v.43 no.1
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• pp.50.1-50.1
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• 2018

We present the development of tools for Echelle spectrograph of NYSC 1-m telescope. The eShel spectrograph(Shelyak) has operated at Deokheung Optical Astronomy Observatory since 2016. We carried out test observation in 2016 and completed the preprocessing and wavelength calibration of the spectroscopic data using IRAF. Based on the reduction process in IRAF, PySpecW, a set of tools for spectroscopic data was developed in 2017. PySpecW was optimized for NYSC 1m telescope, and written in Python for youth to use easily on any OS. PySpecW consists of preprocessing, aperture tracing, aperture extraction, wavelength calibration, and dispersion correction for extracted spectra.

• Journal of Korean Public Health Nursing
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• v.10 no.1
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• pp.23-30
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• 1996

The purpose of study is to find out common factors and variables that affect common factors in level of right knowledge. attitude behavior with respect to AIDS. During the period form Apr.1. 1995 to Jun. 30. guestionnaires, written both in Korean and English. were distributed to Korean Malaysion employees woring at a certain Korean Video companies. and results of replies. given by 80 workers by country. were used as the research matrials. The gathered marials were analyzed through the SPSS package t-test. ANOVA. factor analysis. and the following results were obtained. The 4 extracted common factors could be named 'general publicity', 'transmissive knowledge', 'diagnosis. prevention'. and 'limitted publicity'. The means of trasimssive knowledge. diagnosos. prevention. limtted publicity factors showed higher means in groups who had beyond university level of education than in showed higher means in groups who beyond university level of education than in groups who had below high school level of education. There was a significant relationship between general publicity factor and econmic state. and between limitted publicity factor and preventive education

• Journal of the Korean Institute of Telematics and Electronics
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• v.25 no.3
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• pp.276-286
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• 1988

In this paper, HLML-C (High Level Microprogramming Language C) is proposed, which is independent of target machines and has similar strucrure to C language. The HLML-C operations are defined for a abstract machine which contains characteristics of various microarchitectures, and can extend to define a target machine's special operations for efficient microcode generation. A microprogram written in this language is translated into a machine independent intermediate language on abstract machine with the information of a target machine's resource usage and then microoperations of a target machine. The HLML-C compiler is implemented with yacc and C language on VAX-11/750 (4.3 BSD) computer. Through the various test microprogram applied to HLML-C compiler, their results are analyzed.

• Structural Engineering and Mechanics
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• v.65 no.4
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• pp.359-368
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• 2018

Dynamic analysis of complex and large structures may be costly from a numerical point of view. For coupled vibroacoustic finite element models, the importance of reducing the size becomes obvious because the fluid degrees of freedom must be added to the structural ones. In this paper, a component mode synthesis method is proposed for large vibroacoustic interaction problems. This method couples fluid subdomains and dynamical substructuring of Craig and Bampton type. The acoustic formulation is written in terms of the velocity potential, which implies several advantages: coupled algebraic systems remain symmetric, and a potential formulation allows a direct extension of Craig and Bampton's method to acoustics. Those properties make the proposed method easy to implement in an existing finite element code because the local numerical treatment of substructures and fluid subdomains is undifferentiated. Test cases are then presented for axisymmetric geometries. Numerical results tend to prove the validity and the efficiency of the proposed method.

• Journal of applied mathematics & informatics
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• v.29 no.3_4
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• pp.987-1000
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• 2011

We show how the dynamic optimization problem with the capital constraint can be reduced to the problem to find an optimal modified claim $\tilde{\psi}H$ where $\tilde{\psi}$ is a randomized test in the static problem. Coherent risk measure is used as risk measure in the $L^{\infty}$ random variable spaces. The paper is written in expository style to some degree. We use an average risk of measure(AVaR), which is a special coherent risk measure, to see how to hedge the modified claim in a complete market model.