• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 1998년도 춘계 학술발표회 논문집
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• pp.271-277
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• 1998

1. Why Wind Power\ulcorner Advantages of Wind Energy : free cost, non-pollutant, free waste large unit is possible Disadvantages : intermittent of energy density limited sites Unit Capacity of various Power Plant Solar PP : 10 - 500㎾ Wind PP : 200 - 2000 ㎾ Nuclear PP 700 - 1000 MW Installation Cost of Power Plants Nuclear PP : $ 2,500/㎾ Solar PP : $ 6,000/㎾ Wind PP : $ 1.000 /kw.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1995년도 추계학술대회 논문집
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• pp.257-260
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• 1995

The Field Emission Display promises to improve upon the performance of the traditional CRT, while overcoming the CRTs disadvantages in size and weight which limit its use in portable applications. The technical feasibility of the FED has been reviewed and expeceted to move toward the product development.

• 한국수학사학회지
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• 제13권1호
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• pp.99-112
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• 2000

In this paper we discuss the teaching methods about statistical inferences. Bayesian methods have the attractive feature that statistical conclusions can be stated using the language of subjective probability. Simple methods of teaching Bayes' rule described, and these methods are illustrated for inference and prediction problems for one proportions. Also, we discuss the advantages and disadvantages of traditional and Bayesian approachs in teaching inference.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1990년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 26-27 Oct. 1990
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• pp.550-555
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• 1990

In the VSS control, reaching phase and chattering problem are the main disadvantages. A simple nonlinear sliding surface is proposed to cope with the reaching phase. The chattering problem is alleviated by almost continuous control with the compensation using the infinite closed loop.

• 한국조경학회:학술대회논문집
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• 한국조경학회 2007년도 Journal of Landscape Architecture in Asia Vol.3
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• pp.180-185
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• 2007

Although the large-scale new socialist countryside construction has brought a opportunity for the rural landscape construction, it also impacted seriously the style of rural landscape. On the base of analyzing the advantages and disadvantages of new countryside construction, the paper proposed how to construct rural landscape in the construction tide.

• 한국항해학회지
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• 제19권1호
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• pp.71-83
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• 1995

Various types of optical gyroscopes have been proposed and researched to the present in the world. This paper provides an overview of the types of optical gyroscopes, and also introduces technical principles, characteristics, advantages and disadvantages for each type. Moreover, the critical problems in a design have been discussed.

• 수완나부미
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• 제10권2호
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• pp.215-228
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• 2018

The paper provides an appreciation and critical commentary on Stephen Keck's fictional product, the SEABOT. It examines the problems of regional definition, given Southeast Asia's diversity, and provides a positive gloss on this diversity. It also considers certain conceptual and methodological issues raised by SEABOT, and the advantages and disadvantages of this online platform.

• 한국태양에너지학회 논문집
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• 제32권spc3호
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• pp.282-288
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• 2012

Proton exchange membrane fuel cell (PEMFC) is the most promising energy source for the robot applications because it has unique advantages such as high energy density, no power drop during operating, and easy to make compact size. However, PEMFC has intrinsic disadvantages which are delay to start up and difficulty to correspond drastic load changes. These disadvantages can be compensated by hybrid operating with a Li-poly battery. This study is focus to build and understand the hybrid system for the robot system. In this study, we build the PEMFC hybrid system using EOS-320 PEMFC stack, Li-poly battery and G-Philos FDX1-250BU dc-dc converter. The hybrid system is accurately monitored by CAN and RS485. The system was studied under two conditions such as non-loaded and loaded operating conditions. The results show that the system has delay to start up without hybrid operating and it can be compensated with the hybrid operating.

• 동아시아식생활학회지
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• 제24권2호
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• pp.155-165
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• 2014

The purpose of this study was to assess comsumer preferences and perception of Korean foods in Koreans and non-Koreans residing in Korea. Exactly 79 customers (28 Koreans, 51 non-Koreans) were surveyed with questionnaires in English and Korean. Data were analyzed using the SPSS statistical package (21.0) and ${\chi}^2$-test. Subjects were of various nationalities, including China (37.3%), Philippines (19.6%), Japan (17.7%), USA (11.8%), Uzbekistan (3.9%), Nepal (2.0%) and Nigeria (2.0%). The representative food was Kimchi and favorite Korean foods were Kimchi, Bulgogi, Bibimbap, Galbijjim etc. Koreans reported that the main advantages of Korean food were its 'home-made style', but non-Koreans reported 'health functionality'. In terms of disadvantages, non-Koreans consumers ranked 'unsanitary eating style without individual plates' as the biggest problem while Koreans ranked 'table setting at a time'. Factors 'complicated cooking method', 'spicy taste' and 'salty taste' were also reported disadvantages. Survey participants were asked what was the most important for the globalization of Korean food. Most non-Korean participants listed 'health functionality' and 'traditionalism' (p<0.05).

• Journal of Power Electronics
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• 제14권1호
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• pp.48-60
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• 2014

Multilevel inverters have been widely used for high-voltage and high-power applications. Their performance is greatly superior to that of conventional two-level inverters due to their reduced total harmonic distortion (THD), lower switch ratings, lower electromagnetic interference, and higher dc link voltages. However, they have some disadvantages such as an increased number of components, a complex pulse width modulation control method, and a voltage-balancing problem. In this paper, a novel nine-level reduced switch cascaded multilevel inverter based on a multilevel DC link (MLDCL) inverter topology with reduced switching components is proposed to improve the multilevel inverter performance by compensating the above mentioned disadvantages. This topology requires fewer components when compared to diode clamped, flying capacitor and cascaded inverters and it requires fewer carrier signals and gate drives. Therefore, the overall cost and circuit complexity are greatly reduced. This paper presents modulation methods by a novel reference and multicarrier based PWM schemes for reduced switch cascaded multilevel inverters (RSCMLI). It also compares the performance of the proposed scheme with that of conventional cascaded multilevel inverters (CCMLI). Simulation results from MATLAB/SIMULINK are presented to verify the performance of the nine-level RSCMLI. Finally, a prototype of the nine-level RSCMLI topology is built and tested to show the performance of the inverter through experimental results.