• Journal of Agricultural Extension & Community Development
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• v.13 no.1
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• pp.195-208
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• 2006

This study was carried out to analyze the working conditions and Job Satisfaction of foreigner agricultural trainees. Foreigner training program is governmental project to decrease the shortage of labor resources in farm household and increase of income for trainees, to transfer the agricultural technology to sending country. For this purpose, data were gathered from 110 foreigner agricultural trainees consisted of 91 Uzbekistanian and 19 Mongolian by interview with questionnaire. The results are as follows: 1) the trainee answered to increase the income and technical training regardless of nationality, age, wedding, and types of agriculture. 2) the trainee felt crucial difficulties in language usage and homesick during the training program, 3) Training program should be concretized in working schedule.

• Journal of Institute of Convergence Technology
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• v.1 no.2
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• pp.37-42
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• 2011

The purpose of this research is to improve nitrogen removal efficiency in winter season through rise of water temperature of extraneous water by using solar energy which is estimated to have great potential among new regeneration energy and while operating Plug-Flow Reactor to improve nitrogen removal efficiency by selecting A/O process among sewage waste water treatment processes as the necessity of solving the problem of nitrogen removal efficiency according to reduced water temperature in winter season and strengthening of water quality criteria regarding discharged sewage waste water suggested in the research background. Summarizing the research result, supply of solar energy source improves the function outstandingly when removing nitrogen, (nitrogen removal rate before operating solar energy 55.4% ${\rightarrow}$ nitrogen removal rate after operating solar energy 84.1%).

• Journal of The Institute of Information and Telecommunication Facilities Engineering
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• v.2 no.4
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• pp.28-41
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• 2003

A micros-strip ring patch antenna with ultra wide band characteristics is presented. The proposed antenna is designed by a modified form of the annular ring patch antenna with modified microstrip feedline. The designed antenna gives 5.6GHz bandwidth with regular radiation pattern from 4.4GHz to 12.0GHz for -10dE return loss or VSWR of less than 2.0 in simulation, which is also excellently agreed with the measured data.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.223-226
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• 2006

산업용 소프트웨어의 유형은 크게 패키지형, 내장형, 시스템형으로 구분할 수 있다. 패키지형 소프트웨어는 산업용 ERP를 의미하며, 내장형 소프트웨어는 산업용 기기에 내장되어 사용되고, 시스템형은 제조 및 생산 시스템의 전반적인 제어를 위한 소프트웨어이다. 본 연구에서는 산업용 내장형 소프트웨어를 대상으로 하여 품질시험 및 평가를 수행할 수 있는 평가모듈의 개발에 관해 기술하였다. 평가모듈의 객관성 및 타당성을 제고하기 위해서는 국제표준을 기반으로 한 체계 구축이 필수적이다. 관련된 국제표준으로는 소프트웨어 제품의 요구사항 및 평가에 관한 표준인 ISO/IEC 12119와 9126이 있으며, 평가모듈의 구성 형식을 규정하고 있는 ISO/IEC 14598-6이 있다. 이러한 표준들을 기반으로 하여 산업용 내장형 소프트웨어의 품질 요구사항을 추출하고 품질 요구의 만족 수준을 평가할 수 있는 평가 모듈을 구축하였다.

• Biotechnology and Bioprocess Engineering:BBE
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• v.11 no.4
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• pp.282-287
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• 2006

A Caulobacter crescentus epoxide hydrolase(CCEH) from a recombinant Escherichia coli was purified to homogeneity using a three-step procedure. The CCEH protein was purified 7.3-fold with a 22.9% yield in overalll activity. The optimal reaction temperature and pH were determined to be $37^{\circ}C$ and pH 8.0, respectively. The addition of 10%(v/v) dimethylsulfoxide as a cosolvent improved the enantioselectivity of CCEH for a batch kinetic resolution of racemic indene oxide.

• Communications for Statistical Applications and Methods
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• v.15 no.1
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• pp.43-50
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• 2008

Multinomial logistic regression is a well known multiclass classification method in the field of statistical learning. More recently, the development of sparse multinomial logistic regression model has found application in microarray classification, where explicit identification of the most informative observations is of value. In this paper, we propose a sparse multinomial kernel logistic regression model, in which the sparsity arises from the use of a Laplacian prior and a fast exact algorithm is derived by employing a bound optimization approach. Experimental results are then presented to indicate the performance of the proposed procedure.

• Communications for Statistical Applications and Methods
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• v.15 no.6
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• pp.1003-1011
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• 2008

Mixed-effect Poisson regression models are widely used for analysis of correlated count data such as those found in longitudinal studies. In this paper, we consider kernel extensions with semiparametric fixed effects and parametric random effects. The estimation is through the penalized likelihood method based on kernel trick and our focus is on the efficient computation and the effective hyperparameter selection. For the selection of hyperparameters, cross-validation techniques are employed. Examples illustrating usage and features of the proposed method are provided.

• Proceedings of the KIEE Conference
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• 1991.07a
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• pp.478-481
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• 1991

This paper discusses the principle and structure of instantaneous voltage drop compensator, which protects damage from instantaneous voltage drop in systems such as computer, variable speed drive, high voltage discharge-lamp, magnet switch. When instantaneous voltage drop occurs, control circuits detect it, then produce output voltage the same as normal condition voltage. Instantaneous voltage drop compensator has condenser bank as energy storage component, so system can be made small, light weight compared with UPS. In normal state, utility source transfers power, and in instantaneous voltage drop state, the energy of condenser bank transfers power through inverter, so high efficiency, compact, and especially low cost system can be manufactured.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.05e
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• pp.100-103
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• 2003

고휘도 LED(light emitting diode) 빨강(R), 녹색(G), 파랑(B), 호박색(A), 백색(W) 등의 중요한 광학특성인 광속(luminous flux), 효율(luminous efficacy), 피크 파장(peak wavelength), 가중치 평균 파장(weighted average wavelength), 반치폭 (full width at ha1f maximum), 색도좌표(chromaticity coordinate), 주 파장(dominant wavelength), 자극순도 (excitation purity) 와 휘도순도(colorimetric purity)에 대해서 비교검토하였다. 시험결과로 제시된 LED의 기본적인 특성 데이터는 추후, 새로운 조명용 LED 램프나 등기구(luminaire)를 개발 및 특성연구에 많은 도움을 줄 것으로 사료된다.

• Proceedings of the KIEE Conference
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• 2003.04a
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• pp.143-145
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• 2003

In this paper, wind power system with direct-driven axial-flux type permanent-magnet (PM) synchronous generator, 10 [kVA], 300 [rpm], is presented. In order to analyze the performance of axial PM generator, finite-element (FE) analysis is used, and the 2-dimensional equivalent model is developed. The steady-state and transient-state characteristics are respectively analyzed at no-load and resistive-inductive loads. The test results of driving characteristics are presented as well. The results are very similar to predicted performance of design. Proposed generator is feasible for use with a small-class wind power applications.