• 한국광학회:학술대회논문집
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• 한국광학회 2008년도 하계학술발표회 논문집
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• pp.179-180
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• 2008

Optical Mechanical splice is essential component to construct for FTTH. Optical Mechanical splice is executed many countries' FTTH including Korea. In this paper, we have designed Optical Mechanical splice using UV and completed a series of mechanical and environmental tests on the optical Mechanical splice. And the results of tests and Bellcore-requirements for optical Mechanical splice will be presented. Accordingly, evaluation method of optical Mechanical splice has gained power to improve the quality and stability of it.

• Architectural research
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• 제10권2호
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• pp.27-35
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• 2008

Because of several advantages of mortar-filled sleeve splice in reinforced concrete buildings, this method is being applied increasingly at construction sites and various methods of the splice have been developed in Korea and other countries. In order to apply this system in the field, studies on mortar-filled sleeve splice have been mainly experimental research focused on overall structural performance. However, for understanding the structural characteristics of this splice more accurately, we need to study the confining effect of sleeve, which is known to affect bond strength between filling mortar and reinforcing bar, the most important structural elements of the bar splice. Thus, in order to examine the confinement effect of mortar-filled steel pipe sleeve splice, the present study prepared actual-size specimens of steel pipe sleeve splice, and conducted a loading. Using the test results, we analyzed how the confining effect of steel pipe sleeve affects the bond strength of this splice and obtained data for developing more reasonable methods of designing the splice of reinforcement.

• 한국구조물진단유지관리공학회 논문집
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• 제16권1호
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• pp.27-34
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• 2012

본 연구에서는 기존의 모르타르 충전식 슬리브 철근이음에 대한 부착강도식으로부터 유도한 이 철근이음의 파괴모드 추정방법을 이용하여, AIJ 규준에 의하여 평가한 이 슬리브 철근이음의 강성을 검토하였다. 이것을 위하여 261개 모르타르 충전식 슬리브 철근이음의 기존 실험자료를 채택하여 실험의 결과를 분석한 결과에 의하면 모르타르 충전식 철근이음의 파괴모드 추정방법은 돌기가 없는 강관 슬리브에 SD500 철근을 사용한 철근이음을 제외한 모르타르 충전식 슬리브 철근이음에 대한 강성을 효과적으로 평가할 수 있었다. 그리고 이 슬리브 철근이음의 파괴모드 추정방법에 적용하여 철근의 인장파단 영역에 있는 실험체 중에 주물 슬리브와 돌기가 있는 강관 슬리브를 사용한 실험체에서 SD400 철근을 사용한 경우는 98%, SD500 철근을 사용한 경우는 모든 실험체가 단조가력 시의 강성이 AIJ 규준의 A급 이상인 것으로 나타났고, 철근의 인장파단 영역에 있는 모든 실험체는 슬리브의 종류와 슬리브에 매입한 철근 종류에 관계없이 반복가력 시의 강성이 AIJ 규준의 A급 이상인 것으로 나타났다.

• 한국생물정보학회:학술대회논문집
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• 한국생물정보시스템생물학회 2005년도 BIOINFO 2005
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• pp.167-172
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• 2005

This paper introduces a method which improves the performance of the identification of splice sites in the genomic DNA sequence of eukaryotes. This method combines a low order Markov model in series with a neural network for the predictions of splice sites. The lower order Markov model incorporates the biological knowledge surrounding the splice sites as probabilistic parameters. The Neural network takes the Markov encoded parameters as the inputs and produces the prediction. Two types of neural networks are used for the comparison. This method reduces the computational complexity and shows encouraging accuracy in the predictions of splice sites when applied to several standard splice site dataset.

• 음성과학
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• 제10권3호
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• pp.263-277
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• 2003

One of major problems in speech recognition is performance degradation due to the mismatch between the training and test environments. Recently, Stereo-based Piecewise LInear Compensation for Environments (SPLICE), which is frame-based bias removal algorithm for cepstral enhancement using stereo training data and noisy speech model as a mixture of Gaussians, was proposed and showed good performance in noisy environments. In this paper, we propose several methods to improve the conventional SPLICE. First we apply Cepstral Mean Subtraction (CMS) as a preprocessor to SPLICE, instead of applying it as a postprocessor. Secondly, to compensate residual distortion after SPLICE processing, two-stage SPLICE is proposed. Thirdly we employ phonetic information for training SPLICE model. According to experiments on the Aurora 2 database, proposed method outperformed the conventional SPLICE and we achieved a 50% decrease in word error rate over the Aurora baseline system.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1996년도 가을 학술발표회 논문집
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• pp.508-513
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• 1996

The purpose of this paper, having chosen the connection method, filled by High-strength mortar, in conncetion of PC member, is to study the mechanical behaviour and practical usage of the method. The paper estimates the connection ability of Reinforced-bar, that is, Sleeve considering the effect of Reinforced-bar's dimeter. Sleeve's length and diameter in the structural behaviour of mortar-filled connection, therefore the behaviour of Splice-Sleeve exists in concrete practically. This paper discusses the effect of the concrete in Splice-Sleeve. Also, to estimate structural behaviour in a practical wall panel, the upper and bottom wall panels are produced and the behaviour of Splice-Sleeve is discussed. And then Vertical Tie Bar being designed by using Precast method, this paper presents the various application and the practicable method using Splice-Sleeve.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 추계 학술발표회 제17권2호
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• pp.17-20
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• 2005

Moment-curvature relation of RC pier is influenced greatly in occurrence form of crack and difference is happened according to consideration existence and nonexistence of tension stiffening effect. However, studies considering these is very insufficient misgovernment. Also, it is sometimes unavoidable lap splice of axial reinforcement in plastic hinge region of RC piers. However, specific design standard about lap splice of axial reinforcement is unprepared real condition and study about effect that lap splice of axial reinforcement get in occurrence form of crack is insufficient misgovernment. Therefore, in this paper, experiments are performed with hollow RC piers that do lap splice of axial reinforcement by main variable. And this study present analytical method about moment-curvature relation of hollow RC pier that consider tension stiffening effect and analyze effect that lap splice of axial reinforcement gets in occurrence form of crack. Analytic method of moment-curvature relation of RC pier that present in this study shows very similar motion with experiment result and crack interval of RC pier is suffering dominate impact in the augmented reinforcement amount by lap splice and average crack interval decreases as lap splice ratio increases.

• 한국안전학회지
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• 제18권4호
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• pp.110-114
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• 2003

In this study is proposed the advanced elasto-plastic analytical method which can identify complex structural behaviors on the splice part of steel structures such as sliding and plastic contact problem between splice plates and blots. Compliated boundary conditions and various manufacturing defects are considered in various analytical cases. In the design or repair phase the plastic behavior and ultimate strength of splice parts should be very carefully verified to extend the service life of steel structures.

• 한국건설관리학회논문집
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• 제8권2호
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• pp.136-145
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• 2007

우리나라의 초고층 건축물은 초고층아파트가 대도시 주거건축의 대표적인 유형으로 등장하면서 점차 증가하고 있다. 최근 건축되고 있는 이러한 초고층 건축물에서는 건물의 안정성과 내구성 등을 감안하여 사용재료의 강도도 점차 증가하고 있다. 이에 따라 철근의 경우 SD500철근을 사용하는 공사현장을 쉽게 볼 수 있게 되었다. 이에 본 연구에서는 국내의 건축공사에서 사용되는 SD500철근의 사용 실태를 분석하였다. 또한 SD500철근의 이음방법으로 많이 사용되고 있는 겹침이음과 커플러이음에 대한 경제성 평가방법을 제안하고, 이를 2006년 12월 서울을 기준으로 평가하였다. 경제성 평가 결과, 커플러 이음은 철근직경이 클수록 콘크리트의 강도가 낮을수록 겹침이음에 비해 공사비용 측면에서 상대적으로 유리한 것으로 분석되었다.

• 한국건축시공학회지
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• 제8권1호
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• pp.71-76
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• 2008

Recently, the high-rise apartment housings have become a prototype of the urban residential dwelling in Korea and the numbers of one have steadily been increasing. According to this trend, the strength of the construction materials is also fortified to assure the stability and durability of the buildings. Specially, Re-bar of SD500 type is largely used at the construction sites of high-rise building. This study analyzes the current usage of SD500 high-strength re-bar at domestic construction sites. Through the result of this analysis, we develop Economic Evaluation Model that measure economic efficiency of lap splice and coupler splice, which are most commonly used in connection SD500. The evaluation method was applied to construction sites in Seoul in December 2006, and the result revealed that coupler splice is relatively superior in terms of cost efficiency when the re-bar diameter is longer and the concrete strength is lower.