• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.30 no.4
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• pp.341-349
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• 1994

From the results of model tests, statistical regression analysis for EHP estimation based on hull form parameters is adopted in this study. From this result, the method for estimation of EHP and optimization of hull form parameters at the initial design stage of fishing boats is developed. This method is applied to two standard fishing boats with chine lines. The EHP s are estimated and compared to experimental results. From the optimization of four principal hull form parameters of these fishing boats, approximately 19% of resistance reduction at the design speed is achieved and thus certifies that this method can be used efficiently for the initial design of hull forms of fishing boats.

• The KIPS Transactions:PartC
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• v.12C no.5 s.101
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• pp.673-678
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• 2005

Alamouti STC (Space-Time Code) is a part of the UMTS-WCDMA standard. However, up to the best of our knowledge no closed-form BER formula for this famous code exists. Evaluating its performance through simulations is time-consuming and therefore, there should be analytical BER graphs to serve as a reference which are derived in this paper for coherently BPSK-modulated data.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10b
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• pp.257-259
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• 2000

다양한 전자문서를 효율적으로 처리하기 위해서는 구조문서 정의가 가능한 SGML(Standard Generalized Markup Language)이나 XML(eXtensible Markup Language)을 이용할 수 있다[1,2]. SGML 및 XML과 같은 구조문서를 생성하기 위해서는 별도의 편집기가 필요하며 현재 다양한 제품이나 연구결과를 살펴볼 수 있다[3,4]. 그러나 기존의 입력, 편집 시스템에서는 사용자가 작성하려는 문서에 대한 구조를 숙지하여야 하는 동시에, DTD(Document Type Definition)에 대한 지식을 필요로 한다. 이를 인해 복잡한 구조의 SGML 및 XML 문서를 일반인들이 사용하기 어렵고, 작성한 결과에 대한 검증 과정이 필수적으로 요구된다. 또한 다양한 분야에서 적용 가능한 전자문서 시스템을 위해서는 효과적인 통합 DTD의 정의와 처리 방법이 필요하다. 따라서 본 논문에서는 구조화 문서에 대한 지식이 없는 일반인들도 쉽게 구조문서 작성이 가능하며, 통합적 DTD의 효율적인 처리가 가능한 Form 기반 편집 시스템의 모델을 제시하며, 특히 웹에서도 적용이 가능한 XML을 지원한다. 그 결과 본 연구에서 개발한 XML 편집 시스템은 Form 기반의 통합 DTD 처리와 XML 문서 작성 및 출력 기능, 그리고 이미지, 테이블 기능 등을 제공함으로써 누구나 쉽고 정확한 XML 문서를 작성할 수 있다.

• The Journal of the Korean dental association
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• v.16 no.12 s.115
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• pp.923-928
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• 1978

The auther studied the open-bite of Hellman dental age IIIC groups of Korean childern on the roentgenocephalometry. The subjects consisted of 45 males and 45 females with normal occlusion and acceptable profile. The major conclusions may be listed as follows: 1. This study was summerized in the form of tables, mean, standard deviation, minium and maximum for 35 angular, linear and ration measurements. 2. Charts of standard deviation from the mesurements were made for the clinical application.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2008.11a
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• pp.545-560
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• 2008

O Source import ㅁDirect import form Nastran, ANSYS ㅁDirect import of all the RPM from the files containing the structural results O Solver ㅁDirect computation of all RPM (multiple load case): one matrix resolution with multiple RHS ㅁEfficient solvers (MUMPS, SPARSE, Iterative) ㅁFrequency parallelisms available for very large problems O In practice ㅁSmall problems run on a desktop ㅁLarge problems can exceed 3kHz on a car engine O Easy to mesh ㅁ3D model created in a few minutes thanks to the unequal meshes. O And all Actran standard features

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.04a
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• pp.910-920
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• 1997

In this paper, some of the critical factors in Necking-In process are investigated using a numerical analysis. The optimal processing parameters are established and applied to the actual processes. FEM analysis is carried out based on elastic-plastic work hardening model using ABAQUS / Standard. The results obtained form the commercially available code ABAQUS / standard are compared with the experimental data and shows a good agreement with experimental data. The purpose of this paper is to search for the relations among the roller angel, feed length, and working force. Stress, strain distribution, displacement and increase in the length of the workpiece are also investigated.

• 제어로봇시스템학회:학술대회논문집
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• 1986.10a
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• pp.55-60
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• 1986

Conditions for achieving noninteraction in nonlinear multivariable systems via the decomposition of state space are well established. The main contribution of this paper is to present a Standard Decomposed System (SDS). The SDS is similar to the decomposed system of Isidorl, Krener, Gori-Giorgi, and Monaco but has a finer structure. The finer structure parallels the one used by Gilbert for linear systems. A weaker form of noninteraction, based on input-output behaviour, is decoupling. Some connections between decomposition and decoupling are also established.

• The Journal of the Korean dental association
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• v.9 no.1
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• pp.63-66
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• 1971

The authors studied the open bite of 100 Korean adults of both sexes with normal occlusion aged 20~23 using profile cephalometric roentgenogram. 1. This study was summarized in the form of tables, mean, standard deviation, minimum and maximum for 18 angular measurements. 2. For the clinical application of this research standard deviation chart for the 12 angles suitable to the study of open bite.

• Journal of the Korean Institute of Telematics and Electronics
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• v.23 no.6
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• pp.988-994
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• 1986

We present an automated CMOS standard cell design mehtodology which generates a mask description in the CIF (Caltech Intermediate Form)from a user-given logic description and design rule. The resultant layout reflects the user's choice among N-well, P-well and twin-well process and user's decision whether the guard band is to be included or not. Noise margin of each cell was improved by carefully adjusting the channel width of P-FET.

• Transactions of the Korean Society of Mechanical Engineers
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• v.13 no.5
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• pp.862-874
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• 1989

A phase evil method and spectrum analysis were instrument error which is originated from measurement system and the form error of standard specimens. An instrument with a rotating table supported by an air bearing is calibrated using standard specimens. The phase of standard specimens was measured 12 times on the rotating table with rotating 30 in turn and its measurement magnification was set by 100000 times. As a result of data analysis of all the observations, read out at each of 144 orientations(per 2.5) from recorded datafiles, the error of the performance of the instrument and those of the standard specimens are evaluated and a systematic deviation of the instrument is determined. In the particular instrument used in the present experiment, the deviation of the instrument is determined with the accuracy of 15nm and those of standard specimens with the accuracy of 23, 13 n, respectively. The reproducibility of the instrument is investigated, too. If the instrument is calibrated by using the above standard specimens, then the accuracy of the measurement of roundness error can be improved to about 15nm.