• 한국세라믹학회지
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• 제45권6호
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• pp.309-319
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• 2008

This study evaluates a range of materials that may be used to design prostheses for bone. It is found that nanocrystalline ceramic-polymer composite could be the best material for prosthetic bone with respect to biocompatibility, morphology, chemistry, and compatibility with the piezoelectric and mechanical behavior of long human bones, such as the femur.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 추계학술대회 논문집(II)
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• pp.1094-1099
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• 2002

In this paper, a numerical method for vehicle-track interaction analysis is developed to evaluate vertical dynamic force subjected to rail surface. A vehicle is modelled by lumped masses system and track by multi layered continuous beam system. The equation of motion of vehicle and track interaction system is derived by considering compatibility condition at the contact points between wheel and rail. The input vibration source is given by the empirical formula of power spectral density of track irregularity, which is suggested by FRA. Using this method, dynamic impact factors with the train speed are evaluated.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 통신소사이어티 추계학술대회논문집
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• pp.349-352
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• 2003

Due to low bandwidth and high error rate, the wireless Link is more frequent disconnected than the wired link. Link failure in the method invocation often appears as a failed method invocation. Framework of RMI is adjusted with queuing of method call. RMI's performance can be enhanced without breaking compatibility with Java RMI specification.

• 한국철도학회:학술대회논문집
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• 한국철도학회 1999년도 추계학술대회 논문집
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• pp.463-470
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• 1999

In this paper, a numerical method for evaluating the efficiency of vibration reduction of substructure under slab track is developed for optimal design of floating slab track. The equation of motion for train and track interaction system is derived by applying compatibility condition at the contact points between wheels and rails. The train is modelled by 3-masses system and the track by continuous support beam system. Numerical analyses are carried out to investigate the effect of train speed, stiffness and damping of slab-pad, and track irregularity upon vibration reduction in substructure under the track.

• 유통과학연구
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• 제15권10호
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• pp.15-28
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• 2017

Purpose - With the rapid growth of Chinese mobile pay market, it's necessary to run a study of the aims why users prefer to intention of use for mobile fingerprint payment. To reach this goal, UTAUT added Perceived Security and DOI. Research design, data, and methodology - The researchers conducted this study by using collected 3126 responses and the collected data was analyzed by applying statistical techniques factor analysis, AMOS, and Cronbach's Alpha and SPSS 22.0. Results - The result shows that compatibility and relative advantage of mobile fingerprint payment have positive effect on performance expectancy and effort expectancy separately, and the performance expectancy and effort expectancy have positive effect on people's use intention of mobile fingerprint payment. Social influence has a positive effect on the users' use intention of mobile fingerprint payment, Facilitating conditions has a slight effect on the users' use intention of mobile fingerprint payment, Perceived security has the most significant effect on he users' use intention of mobile fingerprint payment. Conclusions - The research showed that compatibility is one of the most important elements that make users continue to use the product. The mobile fingerprint payment must own clearer advantages than other ones that it can reach the biggest market. The Social Influence has a positive influence on the intention of use.

• 한국위성정보통신학회논문지
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• 제9권1호
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• pp.102-106
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• 2014

본 논문에서는, 이중대역 안테나를 가진, 인체 거치용 단말장치 모사구조의 HAC(보청기 EMC) 지수가 실재환경으로부터 받는 영향에 대한 관찰이 이뤄진다. 첫째, 부착형 이동통신 장치에 필수적인 인접 구조를 고려한 이중대역 내장형 안테나가 설계된다. 이 설계는 모사구조의 제작을 통해 실제의 모습을 갖춘다. 둘째, 이 장치의 HAC 지수는 손에 부착하기 전과 후에 대해 모의시험 및 측정을 통해 얻어진다. 특히, 실재 장치의 전자장 모의시험 결과는 표준 측정법에 의해 타당성이 확인된다. 마지막으로, HAC 기주는 대역, 실장환경, 손(인체) 효과의 관점에서 분석된다.

• 한국산학기술학회논문지
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• 제13권6호
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• pp.2743-2750
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• 2012

동축 케이블에 영상, 음성, 데이터 등을 전송할 수 있는 SDI(Serial Digital Interface) 기술을 카메라에 적용한, HD-SDI 카메라는 다양한 SDI 장치 및 제품들과의 호환성이 중요하다. 즉, 각각의 SDI 장치 및 제품들이 표준을 준수하여 호환성을 유지해야 상호간 동작에 문제가 없게 된다. 현재, HDcctv Alliance에서는 각각의 SDI 장치 및 제품들을 특성별로 구분하여 그에 따른 표준을 정해 놓았다. 각각의 SDI 장치 및 제품들이 상호간의 올바른 동작을 하기 위해서 각각의 표준을 준수하면서 제품을 만드는 것은 중요하다. 본 논문에서는, HDcctv 표준을 준수하는 카메라 시스템을 구현하였으며, HDcctv 표준에 따라 설계를 하여, HDcctv Alliance의 인증을 받기 위한 모든 데이터를 측정하여 표준에 맞는 결과를 얻었다.

• 디지털융복합연구
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• 제12권7호
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• pp.285-290
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• 2014

병원에 직접 가지 않아도 집에서 진료결과를 쉽게 확인할 수 있고 환자가 원하는 최적의 서비스를 최적의 타이밍에 제공받을 수 있다는 많은 장점에도 불구하고 현재 사용되고 있는 개인 헬스케어 기기는 제조사들이 만든 독자적인 소프트웨어 하드웨어 프로토콜로 인해 기기들 간의 호환성이 거의 없다. 이러한 문제 때문에 개인 헬스케어 기기와 셋톱박스 간의 표준화가 매우 필요하며, 이를 위해 본 연구에서는 IEEE P11073 표준을 이용하여 개인 헬스케어 기기와 셋톱박스 간의 생체 데이터 전송이 가능한 헬스케어 셋톱박스를 설계하였다. IEEE P11073 표준을 이용한 셋톱박스는 다양한 헬스케어 기기에 대한 독립적 데이터 전송을 가능케하여 헬스케어 시장의 활성화에 큰 기여를 할 것이라 기대한다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.1580-1587
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• 2005

To calculate the long-term allowable strength of geosynthetic reinforcement, replacement method was recommended. The isochronous creep curve by S. Turner was used to define the relation between creep strain and allowable strength. In isochronous curve at given time, one can read the allowable strength at allowable creep strain. The allowable strain gets from specification by directors or manufacturers according to the allowable displacement of reinforced structures. The allowable strength can be determined in relation to the allowable horizontal displacement each structures case by case. The effect of install damage on isochronous behaviors of geosynthetic reinforcement was little. In previous study, install damage increase the creep strain slightly. And the degradation was not identified. But it is supposed that degradation increase the creep strain. In conclusion, The recommended model to determine long-term allowable strength of geosynthetic reinforcements considering tensile deformation of reinforcement and soil is fit for proper, correct and economic design for reinforced earth walls.

• 한국공간구조학회논문집
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• 제17권4호
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• pp.149-157
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• 2017

An innovative analysis method is proposed in this paper for the determination of ultimate resistance of prestressed concrete beams. The proposed method can be applied to simply supported or continuous beams in a unified manner whether structure and external loads are symmetric or not. Through the iterative nonlinear strain compatibility solutions, this method can also be applied to the non-prismatic section/un-symmetrical composite structures under moving load. The conventional studies have used the failure criteria when the strain of concrete reaches 0.003. However compared with bonded case, the value of strain in the reinforcement is much smaller than bonded case, thus, unbonded prestressed cases show compressive failure mode. It is shown that the proposed method gives acceptable results within 5% error compared with the prior experimental results. It can be shown that the proposed method can reach the solution much faster than typical three-dimensional finite element analysis for the same problem. This method is applicable to the existing unbonded prestressed members where deterioration has occurred leading to the reduced ultimate resistance or safety. In all, the proposed procedure can be applied to the design and analysis of newly constructed structures, as well as the risk assessment of rehabilitated structures.