• 한국정보과학회논문지:소프트웨어및응용
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• 제31권12호
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• pp.1649-1659
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• 2004

텍스트 생성(text generation)은 언어가 아닌 다양한 지식원으로부터 텍스트를 생성해 내는 언어 처리의 한 분야로, 여러 가지 복합적이고 단계적인 과정을 통해 이루어진다. 본 논문에서는 자연스러운 텍스트 생성을 위한 여러 과정 중, 한번 언급된 대상(entity)을 자연스럽게 지시(refer)하기 위한 지시어 생성(referring expression generation), 특히 한국어에 두드러진 영형(zero pronoun)에 의한 대용화(pronominalization) 과정에 초점을 맞춘다. 이를 위해, 구문 정보와 비용기반 중심화 이론(cost-based centering model)을 바탕으로, 한국어에 적합한 지시어 특히 영형의 생성에 영향을 미치는 다양한 자질(feature)들온 규명하고, 기계 학습을 통해 지시어 생성 모델을 구축하였다. 세 개의 장르 - 묘사문(설명문), 뉴스, 짧은 우화 - 에서 총 95개의 텍스트로부터 학습이 이루어 졌으며 이론 대상으로, 제안된 자질들이 지시어의 생성, 특히 영형의 생성에 효율적으로 적용될 수 있음을 보였다. 또한, 지시어 생성과 관련된 기존의 방법론들과 본 논문에서 제안한 모델을 비교하여 성능이 크게 향상되었음을 보이고, T-test를 통해 99.9%의 신뢰 구간에서 그 성능 향상이 통계적으로 의미가 있음을 확인하였다.

• 한국정보과학회논문지:소프트웨어및응용
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• 제32권10호
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• pp.990-1002
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• 2005

자연스러운 텍스트를 생성하기 위해서는, 한번 언급된 대상을 지시하기 위한 대용화(pronominalization)과정이 필수적이며, 특히 한국어에 빈번히 발생하는 영형(zero pronoun)을 자연스럽게 생성하는 것이 중요하다. 본 논문에서는, 비용기반 중심화 이론(cost-based centering theory)을 적용하여, 선행 발화의 중심 전이(center transition)가 현 발화의 영형에 미치는 영향을 살펴본다. 이를 위해, 영형으로 실현될 수 있는 명사를 중심화 이론에 기반해 문장간 현저성, 문장내 현저성, 문장간/내 현저성을 가지는지의 여부로 4가지 유형(Npair, Ninter, Nintra, Nnon)으로 정의하고, 유형별로 영형 현상을 고찰하였다. 그 결과, 기존에 중심화 이론에서 배제되었던 명사들이 선행 발화의 중심 전이로 설명될 수 있음을 밝혔다. 또, 선행 발화의 중심 전이를 이용한 영형 생성 모델을 구축하여 다양한 자질을 적용한 영형 생성 모델의 성능과 비교하였다.

• Structural Engineering and Mechanics
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• 제71권6호
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• pp.683-697
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• 2019

The reinforced concrete (RC) structures usually suffer large residual displacements under strong motions. The large residual displacements may substantially reduce the anti-seismic capacity of structures during the aftershock and increase the difficulty and cost of structural repair after an earthquake. To reduce the adverse residual displacement, several self-centering energy dissipation braces (SCEBs) have been proposed to be installed to the RC structures. To investigate the seismic responses of the RC structures with SCEBs under the earthquake excitation, an extended Bouc-Wen model with degradation and self-centering effects is developed in this study. The extended model realized by MATLAB/Simulink program is able to capture the hysteretic characteristics of the RC structures with SCEBs, such as the energy dissipation and the degradation, especially the self-centering effect. The predicted hysteretic behavior of the RC structures with SCEBs based on the extended model, which used the unscented Kalman filter (UKF) for parameter identification, is compared with the experimental results. Comparison results show that the predicted hysteretic curves can be in good agreement with the experimental results. The nonlinear dynamic analyses using the extended model are then carried out to explore the seismic performance of the RC structures with SCEBs. The analysis results demonstrate that the SCEB can effectively reduce the residual displacements of the RC structures, but slightly increase the acceleration.

• 정보학연구
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• 제12권2호
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• pp.13-29
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• 2009

ERP in the past, primarily centering on large enterprises and the introduction of competition in the global e-business, but along with the proliferation of small and medium-sized enterprises are now in earnest, or to take advantage of the introduction of the ERP plan. However, the introduction of the ERP cost and the effort required to develop, because many never previously introduced ERP expect that the introduction of cost and performance comparisons with the measurement is necessary. Until now, however, the introduction of a framework of analysis followed the introduction of ERP primarily to measure performance of a major improvement. This research, in addition to improving the performance of these tasks have been overlooked until now for the system's user satisfaction BSC (Balanced Scorecard) models and techniques using AHP-specific understanding of the Company (Group executives, middle managers groups, and user groups) Importance of priorities you want to analyze. In summary, the key findings of this study follows. First, ERP user satisfaction measurement for the balanced scorecard indicators in terms of the redevelopment. Second, the information system user satisfaction to the user layer (Layer 3), grouped by the measure. Thirdly, the user satisfaction of the important topics for attention as quantified by measuring the hierarchy. This model is for satisfaction levels as quantitative of future users of the new system, information systems and the introduction of a new model of development based on the evaluation data will be able to take advantage of.

• Smart Structures and Systems
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• 제26권1호
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• pp.89-102
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• 2020

Shape memory alloy (SMA)-based Superelasticity-assisted Slider (SSS) is proposed as an engineering solution to practically exploit the well-accepted advantages of both sliding isolation and SMA-based recentering. Self-centering capability in SSS is provided by austenitic SMA cables (or wire ropes), recently attracting a lot of interest and attention in earthquake engineering and seismic isolation. The cables are arranged in various novel and conventional configurations to make SSS versatile for aseismic design and retrofit of structures. All the configurations are detailed with thorough technical drawings. It is shown that SSS is applicable without the need for Isolation Units (IUs). IUs, at the same time, are devised for industrialized applications. The proof-of-concept study is carried out through the examination of mechanical behavior in all the alternative configurations. Force-displacement relations are determined. Isolation capabilities are predicted based on the decreases in seismic demands, estimated by the increases in effective periods and equivalent damping ratios. Restoring forces normalized relative to resisting forces are assessed as the criteria for self-centering capabilities. Lengths of SMA cables required in each configuration are calculated to assess the cost and practicality. Practical implementation is realized by setting up a small-scale IU. The effectiveness of SSS under seismic actions is evaluated using an innovative computer model and compared to those of well-known Isolation Systems (ISs) protecting a reference building. Comparisons show that SSS seems to be an effective IS and suitable for earthquake protection of both structural and non-structural elements. Further research aimed at additional validation of the system are outlined.

• 대한건축학회논문집:계획계
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• 제34권6호
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• pp.127-134
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• 2018

The purpose of this study is to derive a model of urban regeneration business using idle facilities in the old city center. The scope of the study was set as empty houses and empty stores owned by private companies, and analyzed the 50 central city revitalization projects using idle facilities in 14 local cities in Japan. The results of this study are follows; First, as an urban regeneration strategy using idle facilities in the old town, it was a combination of other functions centering on commercial functions or introducing new functions required in the city center. Second, various financial supports have been provided to induce the utilization of idle facilities by the private sector, and different strategies have been implemented for businesses that need maintenance first. Third, based on the analysis results, it was possible to derive urban regeneration business model. Fourth, in order to operate smooth business, it is a need for an organization that is in charge of reviewing the consistency of upper-level planning and urban guiding functions such as urban revitalization plan, balance review of expenditure and revenues by cost subsidy and loan repayment, consultation among the business partners.

• 한국실내디자인학회논문집
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• 제15권5호
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• pp.306-313
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• 2006

Digital simulation which was introduced to the architectural field due to the rapid growth of computer graphics, gave birth to a new type of contents called 'virtual reality', led by the interaction with the users and real time processing. The public attention is drawn to the virtual reality's potential as a next generational space simulation it, having the unique characteristics of 'simulation', 'interactivity', 'tole-presence', and 'immersion', is capable of taking a virtual tour of a space with a size equivalent to that of a real space, as well as proceeding with the design progress. Nonetheless, many problems impeding CPU's real time processing of an excessively loaded architectural model data have been pinpointed over the time. Yet such GPU based game engines as 'DirectX' and 'OpenGL', developed to deal with these impediments, have not been easily applied to the architectural simulation in the design process, due to the high license cost and the specific technical requirements for the system. The virtual reality has been developed and distributed centering around the gaming field, and game developers recently show a greater tendency to include level editors in the package for the expandability purpose. Thus, we plan to propose architecture simulation which utilizes level editors in this study. In addition, the compatibility of the game engine based level editors of Quake and Unreal which form the standards for the open source FPS games, based on VRML, the standard format for the virtual reality, was compared and analyzed. Taking the example of Villa Savoye of Le Corbusier, its application possibility as an architecture simulation was assessed, by measuring the extent to which the performance of such characteristic features of the virtual reality as interactivity, immersion, and tele-presence, was improved.