• 전기전자학회논문지
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• 제28권1호
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• pp.1-5
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• 2024

DRAM의 성능 개선을 위해 센스앰프의 미스매치로 인한 센싱페일을 감소시켜야 한다. 플립페일과 달리 딜레이페일은 고속 동작이 요구될 때 더 심화될 수 있어 차세대 메모리 설계 시 면밀히 고려되어야 할 문제이다. Conventional SA는 증폭 시작 시 모든 트랜지스터가 동시에 동작하는 반면, SDSA는 BLB를 출력으로 하는 트랜지스터 2개만 먼저 동작시켜 오프셋을 완화할 수 있다. 본 논문에서는 SDSA의 딜레이페일에 대한 우수성을 시뮬레이션을 통해 검증하였다. Conventional SA에 비해 약 90%의 딜레이 페일 감소 효과를 갖고 있음을 확인했다.

• 공학교육연구
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• 제19권4호
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• pp.60-71
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• 2016

Due to the development of science and technology, diversity of fusion technologies has become a major concern. Especially the application of the convergence education became necessary in the curriculum of engineering department. The purpose of this paper is to extract characteristics of convergence education among engineering majors and to present a model of applicable convergence education. The researchers collected studies of past 15 years in domestic and international journals in related themes. Academic research information systems, DBpia, e-article, Academic Search Complete were used for keyword searches. 43 Korean papers and 25 international papers were analyzed for the study. The results showed that the convergence education models for college of engineering can be classified into the three types: the cooperative convergence, multidisciplinary convergence, and transdisciplinary convergence. Based on the results, a convergence education model is suggested for the schools of engineering in Korea.

• 한국정밀공학회지
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• 제28권1호
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• pp.40-47
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• 2011

Mobile harbor which is a novel concept of ocean transportation to bring the containers from the cargo ship waiting on the ocean away is being focused now. To provide the mobile harbor with the stable loading/unloading condition, it is necessary to develop the oscillation mitigation technologies such as anti-rolling system. Anti-rolling system using AMD(Active Mass Driving) has merits that it can handle the disturbances more actively and mitigate the rolling oscillation faster than other type anti-rolling system. However, rack-and-pinion type AMD has problems such as big friction noise from gears and motor, wear and tear, and continuous maintenance. In this paper, novel anti-rolling system using Maglev type AMD for mobile harbor is suggested in order to resolve the problems caused by the friction. This novel anti-rolling system doesn't make any friction because it supports the moving mass by using magnetic levitation force and moves it by using propulsion force from the linear motor. The demo system of the novel anti-rolling system using maglev type AMD has been developed in order to investigate its feasibility. This paper presents the procedures and results of development of this demo system.

• Journal of applied mathematics & informatics
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• 제33권1_2호
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• pp.127-143
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• 2015

In this paper, we consider a modified inexact Newton method for solving a nonlinear system F(x) = 0 where $F(x):R^n{\rightarrow}R^n$. The basic idea is to accelerate convergence. A semi-local convergence theorem for the modified inexact Newton method is established and an affine invariant version is also given. Moreover, we test three numerical examples which show that the modified inexact scheme is more efficient than the classical inexact Newton strategy.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2011년도 춘계학술발표대회
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• pp.1068-1070
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• 2011

건물 부문의 에너지 절약방안으로 신재생에너지를 이용한 에너지 관리 시스템을 제안하고자 한다. 신재생에너지를 이용한 BEMS(Building and Enviromental Management System)를 설계하고, 이것을 구현하기 위한 Software Framework 를 설계한다.

• 한국융합학회논문지
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• 제7권2호
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• pp.85-91
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• 2016

본 연구는 국내 화재피해자의 긴급복구를 위한 민 관 융합형 지원시스템 방안에 대한 것으로, 화재피해자의 긴급복구활동에 대한 현황과 문제점 분석을 통하여 정부와 민간 협력기반의 통합적 지원시스템 구축방안을 제시하였다. 전체적으로 국가는 시스템 운영의 관리 감독기관의 기능을 담당하고 민간에서 실질적 긴급복구 전담기관의 기능을 담당하는 시스템을 의미한다. 결과적으로, 화재피해 긴급복구 지원을 위한 법제도 정비, 지원사업의 민간위탁 시스템 구축, 소요재원의 안정적 조달 및 민 관 긴급복구의 융합기능 강화를 위한 지원시스템 방안을 도출하였다. 특히, 긴급복구 소요재원의 안정적 조달 방안은 긴급복구를 위한 기금의 신설 및 민간 수탁법인의 자체 재원 조성의 세부방안을 논의하였다. 본 연구결과는 향후 국가 소방안전복지와 사회안전망의 강화에 기여할 것이다.

• 한국태양에너지학회 논문집
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• 제37권3호
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• pp.47-59
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• 2017

As the global warming threats to humanity, renewable energy is considered the key solution to overcome the climate change. In this circumstance, distributed PV systems are being expanded significantly its market share in the renewable energy industry. The performance of inverter is the most important component at PV system and numerous researches are focusing on it. In order to improve the inverter, PV simulator is an essential device to experiment under various load and conditions. This paper proposes the PV Power-Hardware-In-Loop simulator (PHILS) with real-time processing converted electrical and mathematical models to improve computation speed. Single-diode PV model is used in MATLAB/SIMULINK for the PV PHILS to boosting computation speed and dynamic model accuracy. In addition, control algorithms for sub-components such as DC amplifier, measurement device and several interface functions are implemented in the model. The proposed PV PHILS is validated by means of experiments with commercial PV module parameters.

• 한국정보시스템학회지:정보시스템연구
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• 제27권4호
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• pp.71-96
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• 2018

Purpose Recently, social interest in the convergence research is at its peak. However, contrary to the keen interest in convergence research, an infrastructure that makes it easier to recruit researchers from other fields is not yet well established, which is why researchers are having considerable difficulty in carrying out real convergence research. In this study, we implemented a researcher recommendation system that helps researchers who want to collaborate easily recruit researchers from other fields, and we expect it to serve as a springboard for growth in the convergence research field. Design/methodology/approach In this study, we implemented a system that recommends proper researchers when users enter keyword in the field of research that they want to collaborate using word embedding techniques, word2vec. In addition, we also implemented function of keyword suggestions by using keywords drawn from LDA Topicmodeling Algorithm. Finally, the UI of the researcher recommendation system was completed by utilizing the collaborative messenger Slack to facilitate immediate exchange of information with the recommended researchers and to accommodate various applications for collaboration. Findings In this study, we validated the completed researcher recommendation system by ensuring that the list of researchers recommended by entering a specific keyword is accurate and that words learned as a similar word with a particular researcher match the researcher's field of research. The results showed 85.89% accuracy in the former, and in the latter case, mostly, the words drawn as similar words were found to match the researcher's field of research, leading to excellent performance of the researcher recommendation system.

• 한국멀티미디어학회논문지
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• 제19권2호
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• pp.396-404
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• 2016

In this paper, the customized sport convergence contents curation system is proposed for activation of sport for all. The proposed system collects and analyzes profile of social sports group(club, society, etc.) for recommend optimized sport convergence contents to user. And the survey is progressed for research problem of existed service and usefulness of proposed service. The proposed system and service are expected to design innovative new service model for activate of sport for all.

• IEIE Transactions on Smart Processing and Computing
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• 제6권2호
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• pp.124-128
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• 2017

A light guide improves the spatial resolution of a gamma ray imaging system by diffusing the scintillation light. Similarly, light diffusion film, which has been applied to flat-panel-display engineering, spreads the light from the light guide panel. In this study, we adopted light diffusion film for the light guide of a gamma ray imaging system, and evaluated its diffusion characteristics. We compared the light diffusion performance of the film to an ordinary acrylic plate. As a result, the diffusion film widely spreads scintillation light. As for the thickness of the light guide, we acquired more distinct images with three films overlapped than with an acrylic plate. We expect light diffusion film to be a promising candidate for light guides in gamma ray imaging systems.