• Korean Journal of Child Studies
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• v.31 no.3
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• pp.235-254
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• 2010

The purpose of this study was to examine the feasibility and validity of the Application of Cognitive Function Scale as developed by Lidz and Jepsen (1997). Data were collected from 4 to 5-years-old children. The analysis for item adequacy indicated that the passing rate increases according to age. Futhermore the analysis for test adequacy indicated that internal consistency reliability was .85 in the pre-test and .80 of post-test in terms of the cognitive function scale, and .90 of pre-test and .93 in the post-test in relation to the behavior observation scale. In conclusion, our analysis of the ACFS shows sufficiently high scores in terms of both validity and reliability, so as to indicate that this test is an appropriate way to measure the cognitive function and non-intellective function of young Korean children.

• Journal of Industrial Technology
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• v.15
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• pp.113-122
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• 1995

By integrating WDM to OPS unit which plays an important role for the reliability of CPN, we made it possible to provide CATV, VOD, and high-speed data services simultaneously and to meet the requirements for new services in the future. For the design of optimal system, the link analysis of power budget has been performed. Also, the prototyped system has been tested with STM-1 level signals to confirm functions such as transmission, distribution, and protection. The results proved that when occurred out-of-order or recovery of ONU, the system did the pertinent switching with minimum loss for high-speed data services. Also for video distribution services, the system has distributed STM-1 level signals successfully.

• Proceedings of the KIEE Conference
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• 1995.11a
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• pp.61-63
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• 1995

The main factors to bring out the power failure are trouble and operation power failure, the operation power failure of these includes about 85%. So, it is required that the without interruption of service method reduce the operation power failure. If we develop the without interruption of service method, the operation power failure will reduce greatly. It is necessary to develop the without interruption of service method which it solve various trobles (dissatisfacting solution of customer, sales revenue augmentation, and the reduction of the power failure negotiation work). The results of study are drawing up of the specification for temporary transmission methods, it of the working methods for them, and the scrutiny of the technology contents for them.

• Proceedings of the Acoustical Society of Korea Conference
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• autumn
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• pp.189-192
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• 2001

음료수 제조공정에서 살균처리는 필수이며, 이때 살균시간과 살균온도는 맛과 향에 영향을 미친다 기존에 열에 의한 살균처리보다 살균시간과 살균온도를 낮추어 음료수의 맛과 향을 자연그대로 유지하고 품질을 개선하기 위해 초음파와 열을 병행한 살균처리연구를 수행하였다. 실험장치는 자체 개발한 연속식 heptagonal 초음파처리 조를 사용하였고, 대장균과 microbateria를 대상으로 살균처리실험을 수행하였다. 연구결과 상온초음파처리실험에서 처리속도$2\ell/min$에서 살균효과를 확인하였다. 처리용량 증대를 위해 상온초음파처리 후 저온실험결과 $3\ell/min$에서 살균효과를 확인하였다.

• Journal of the Korea Institute of Military Science and Technology
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• v.12 no.5
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• pp.676-682
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• 2009

The idler wheel installed at the front side of the newly developed tracked vehicle didn't meet the durability requirement by showing the crack failure near the jointed region at the wheel during the field test. To find the crack developing mechanism we constructed finite element model for the idler wheel representing the behavior of interface between each suspension units, material properties from the material test data and actual loading conditions. This paper shows a result that maximum von Mises stress near the bolt hole on the outer rim is higher than inner idler coressponding to the actual test result and that result was reversed by adopting the reinforcement outside of the outer rim.

• Proceedings of the KIPE Conference
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• 1998.10a
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• pp.304-309
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• 1998

In this paper, authors introduce an application of a nonlinear rotor flux observer, known under the name of ELO(extended Luenberger Observer), for direct rotor field oriented control(DRFOC) of induction motor. ELO requires no solution of nonlinear partial differential equation for its coordinate transformation and linearization used for the nonlinear observer design. Its simulation results concerned to different level of unknown variables of load torque and rotor resistance show high accuracy on rotor flux estimation in steady state.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2012.05a
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• pp.219-220
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• 2012

Steel method compared with conventional aluminum truss construction materials as the biggest difference, aluminum truss method by using an aluminum material construction of the existing steel truss compared with the welding operation is omitted, as the air operations will be reduced by about 40% do not need skilled workers in the existing portion of each tube and cost 11,233 to 13,173 won/㎡ cheap it was found.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.961-964
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• 2005

디지털홈 서비스는 기존 PC에서 제공하던 서비스와 차별화된 서비스를 실용화 하지 못하고 있는 이유 중에 하나는 오프라인에서 제공하던 의료, 법률, 교육 등의 서비스를 가정에 맞게 직접 제공하고 있지 못하기 때문이다. 이를 위하여 본 논문에서는 온라인에서 의사, 변호사와 안전하게 거래할 수 있도록 국가자격 인증기반을 구축하고자 이에 필수적인 검증 가능한 온라인 자격증 발급을 위하여 기존 공인인증서에 자격필드를 추가하거나, 기존 공인인증서를 그대로 사용하거나, 별도의 자격인증서를 발급하는 등 세 가지 발급모델을 제시한다. 또한 이러한 세 가지 발급모델의 장단점을 비교 분석하여 향후 자격인증기반 구축할 때 선택할 수 있는 기준을 제시한다. 마지막으로 기 제시된 세 가지 발급 모델 중에 자격필드가 추가된 공인인증서를 이용하여 의료서비스(E-Health)를 받는 서비스 모델 시나리오를 제안하고자 한다.

• Proceedings of the Korean Society of Life Science Conference
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• 2005.04a
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• pp.220-220
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• 2005

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.21 no.3
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• pp.209-214
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• 2003

The tasks in the cadastral field are being carried out by the aid of Parcel Based Land Information System which is equipped with both graphical and textual information acquired by the Cadastral Map Computerization Project. This have the purpose to present efficient surveying method as analyzing the accuracy about the field map We can also avoiding the drafting error caused by graphical cadastral and technical error including scale and contraction error as inverting an existing surveying system to the computer surveying system with this data.