• 한국정보통신학회논문지
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• 제2권1호
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• pp.147-156
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• 1998

본 논문에서는 다치 논리를 이용한 연산기를 설계하였다. 다치 논리를 구현하기 위해서 전류모드 CMOS 회로를 이용하였으며 이진 전압모드 신호를 다치 전류모드 신호로 바꾸어 주는 인코더와 연산 결과인 다치 전류모드 신호를 이진 전압모드 신호로 바꾸어 주는 디코오더를 사용하여 기존의 이진 시스템에 적용할 수 있도록 하였으며, 승산기 설계시 부분곱 수를 줄이기 위하여 기존의 Booth 알고리즘을 확장한 4진 SD수 부분곱 발생 알고리즘을 사용하였다. 제안된 회로는 SPICE 시뮬레이션 및 FPGA Chip을 이용한 하드웨어 에뮬레이션으로 그 유효함을 확인하였다

• Journal of information and communication convergence engineering
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• 제14권1호
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• pp.21-25
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• 2016

N-screen is a promising technology to improve support for multimedia multicasting, content sharing, content mobility, media scalability, and seamless mobility. In this paper, the WiMedia distributed-MAC (D-MAC) protocol is adopted for development of a seamless N-screen wireless service. Furthermore, to provide a multi-hop, one source multi-use N-screen service through point to point streaming in a seamless D-MAC protocol, a dynamic multi-frame transmission technology is proposed. In this technology, a dynamic time slot allocation scheme and a multi-hop resource reservation scheme are combined. In the proposed dynamic time slot allocation scheme, two thresholds, a hard threshold and a soft threshold, are included to satisfy the power consumption and delay requirements. A multi-frame DRP reservation scheme is proposed to minimize end-to-end delay during the multi-hop transmissions between N-screen devices. The proposed dynamic multi-frame transmission scheme enhances N-screen performance in terms of the multi-hop link establishment success rate and link establishment time compared to the conventional WiMedia D-MAC system.

• 한국건설순환자원학회논문집
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• 제11권3호
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• pp.267-275
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• 2023

시멘트 산업은 다양한 가연성 폐기물을 천연자원인 유연탄을 대체하는 연료로 사용함으로써 폐기물 처리 문제 해결에 기여하고 있다. 시멘트 제조공정에서 더 많은 폐합성수지 등 대체연료를 사용하기 위해서는 대체연료를 안정적으로 연소시키고, 특히 NOx와 같은 유해물질의 대기배출을 저감할 필요가 있다. 본 연구는 폐합성수지 등 대체연료의 사용량을 증대시키면서 NOx와 같은 대기배출 유해물질의 발생량을 저감하는 기술의 하나인 다단연소 공정에 대한 사례연구다. 실제 시멘트 제조설비에의 기술 적용 전후 연료 사용량, NOx 배출 등을 비교하여 효과를 평가한 결과, 유연탄의 사용량은 38 % 감소, 폐합성수지 사용량은 122 % 증가하면서 동시에 NOx 배출량은 17 % 저감된 것으로 평가되어 다단연소에 의한 폐합성수지 사용 증대 및 NOx 배출 저감 효과가 유효함을 확인하였다.

• 디지털산업정보학회논문지
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• 제6권3호
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• pp.103-109
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• 2010

Total performance is improved by minimizing the channel interference between links in wireless mesh networks (WMNs). The paper refines on the CB-CA [1] to be suitable for multi-radio multi-channel (MRMC) WMNs. The CB-CA is the cluster-based channel assignment algorithm for one radio three channel WMN based on IEEE 802.11b/g. The CB-CA does not perform the channel scanning and the channel switching between the cluster heads (CHs) and the edge gateway nodes (EGs). However, the use of co-channel for links between CHs and EGs brings the problem of channel interference among many nodes. We propose and evaluate an improved CB-CA algorithm to solve this problem in MRMC WMNs. The proposed algorithm discriminates between transmission channel and receive channel and assigns channels to each interface randomly and advertises this information to neighbor clusters in order to be assigned no-interference channel between clusters. Therefore, the proposed algorithm can minimize the interference between clusters and also improve QoS, since it can use multiple interfaces and multiple channels.

• Journal of Electrical Engineering and Technology
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• 제13권5호
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• pp.1821-1830
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• 2018

With the wide application of intelligent household appliances, the optimization of electricity behavior has become an important component of home-based intelligent electricity. In this study, a multi-objective optimization model in an intelligent electricity environment is proposed based on economy and comfort. Firstly, the domestic consumer's load characteristics are analyzed, and the operating constraints of interruptible and transferable electrical appliances are defined. Then, constraints such as household electrical load, electricity habits, the correlation minimization electricity expenditure model of household appliances, and the comfort model of electricity use are integrated into multi-objective optimization. Finally, a continuous search multi-objective particle swarm algorithm is proposed to solve the optimization problem. The analysis of the corresponding example shows that the multi-objective optimization model can effectively reduce electricity costs and improve electricity use comfort.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권5호
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• pp.2509-2528
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• 2019

There are various styles of license plates for different countries and use cases that require style-specific methods. In this paper, we propose and illustrate a multi-style license plate recognition system. The proposed system performs a series of processes for license plate candidates detection, structure classification, character segmentation and character recognition, respectively. Specifically, we introduce a license plate structure classification process to identify its style that precedes character segmentation and recognition processes. We use a K-Nearest Neighbors algorithm with pre-training steps to recognize numbers and characters on multi-style license plates. To show feasibility of our multi-style license plate recognition system, we evaluate our system for multi-style license plates covering single line, double line, different backgrounds and character colors on Korean and the U.S. license plates. For the evaluation of Korean license plate recognition, we used a 50 minutes long input video that contains 138 vehicles of 6 different license plate styles, where each frame of the video is processed through a series of license plate recognition processes. From two experiments results, we show that various LP styles can be recognized under 50 ms processing time and with over 99% accuracy, and can be extended through additional learning and training steps.

• 이베로아메리카
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• 제12권1호
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• pp.407-439
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• 2010

Growth of researches addressing cross-culture in international business is exponential. This article reviews the extant researches around the national culture and describes the various conceptualization of culture through discussion of some of popular models of national culture. This article presented some of the most important issues in international business surrounding globalization, especially convergence and divergence of cultures and cultural changes. Global rapid changes in international business environment request the reconsideration of the assumption of cultural stability and the simple view of culture, which tends to examine the static influence of a few cultural factors in isolation form other cultural factors and contextual elements. This paper identifies a valid cultural grouping and proposes the following typology of the possible methodologies in international business; Ethnological description, Use of proxies, Direct values inference, and Indirect values inference. Rather than selecting a single methodology, it appears to be more appropriate to use multi-method in the cross-cultural international business research. It has been shown that cultural change is intertwined with socioeconomic-institutional variables, and that these variables may also add to determine culture contemporarily. This paper also explained the dynamics of culture as multi-level, multi-layer constructs. According to this model, we may understand how the dynamic nature of culture conveys the top-down-bottom-up processes where one cultural level affects changes in other level of culture.

• 한국실천공학교육학회논문지
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• 제3권2호
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• pp.93-99
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• 2011

영상처리 기술을 이용한 PC정비사 자격증 취득을 돕기 위한 어플리케이션을 소개한다. 요즘 사람들은 컴퓨터의 마우스나, 키보드를 직접 이용하기 보다는 손의 제스쳐, 즉 흥미를 유발시켜 많은 사람들에게 이미지와 그래픽적인 부분을 추가시켜 소개한다. 요즘 화두가 되고 있는 멀티터치 테이블에 3D Maxs, C#을 이용해 각 부품의 Scale 및 Drag를 통해 카메라 뷰를 이동함으로써 효과적으로 자격증 취득을 돕는다. 또한 PC 정비사 국가 자격증에 출제되는 문제를 수록하고, 각 부품을 세부적으로 학습함으로써, 자격증 취득의 기틀을 마련한다. 이에, 본 논문에서는 멀티터치 테이블(MultiTouch-Table) 기반의 학습용 어플리케이션을 제안하고 그 성능을 시험하였다.

• 한국실내디자인학회논문집
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• 제23호
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• pp.124-131
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• 2000

In the nowadays years our city's housing environment which progresses rapidly social-economical development is posited the role in the nowadays multi-family housing brings about the individualism of the nowadays city, and makes muddy neighborhood meaning, and the quality of the nowadays city dwelling house environment becoming worse. This study was started with the cognition of the need of intermediate-space, in the our life in the neighborhood city. Intermediate-spaces, has same meaning to come into the action of consciousness of the neighborhood. For the improvement of the quality of city housing, we should cleary recognized the individual territory after we set the proper in intermediate-zone in the multi-family housing. Therefore, this study inquires ito the meaning of intermediate-zone, and catches the formation technique of intermediate-zone and the method of plan through the investigation of the use cases of the multi-family housing which is established intermediate-territory. and then I analyze the role of the formative space by this method. By this method, I grope for the effect of the use through the alternative plan of the design method of the intermediate-zone. If the methods of play use the role in the nowadays multi-family housing, high quality will build up.

• 한국정보통신학회논문지
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• 제2권3호
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• pp.439-446
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• 1998

본 논문에서는 다치 논리를 기본으로 한 SD 가산기 및 PD 가산기를 설계하였다. 전류 모드 CMOS 회로를 이용하여 다치 논리를 구현하였으며 부분곱으로 전압모드 CMOS 회로도 이용하였다. 설계된 회로에 대한 검증은 대부분 SPICE 시뮬레이션을 통해 확인하였다. 다치 부호를 적용한 SD(Signed-Digit) 수 표현을 사용하여 자리 올림 신호의 전송이 자리수에 관계없이 1단에서 실행되게 함으로써 병렬연산의 고속화를 가능하게 하였고, 또한 M개의 다 입력을 처리하는 가산기에서는 적당한 PD(Positive-digit) 수 표현을 사용하여 가산의 단수를 줄일 수 있으므로 연산의 고속화 및 고집적화를 가능하게 하였다.