• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권2호
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• pp.444-461
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• 2016

A power-saving mechanism for smartphone devices is developed by analyzing the features of data that are received from Internet of Things (IoT) sensors devices to optimize the data processing policies. In the proposed GreenIoT architecture for power-saving in IoT, the power saving and feedback mechanism are implemented in the IoT middleware. When the GreenIoT application in the power-saving IoT architecture is launched, IoT devices collect the sensor data and send them to the middleware. After the scanning module in the IoT middleware has received the data, the data are analyzed by a feature evaluation module and a threshold analysis module. Based on the analytical results, the policy decision module processes the data in the device or in the cloud computing environment. The feedback mechanism then records the power consumed and, based on the history of these records, dynamically adjusts the threshold value to increase accuracy. Two smart living applications, a biomedical application and a smart building application, are proposed. Comparisons of data processed in the cloud computing environment show that the power-saving mechanism with IoT architecture reduces the power consumed by these applications by 24% and 9.2%.

• 디지털산업정보학회논문지
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• 제6권4호
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• pp.33-43
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• 2010

In this paper, we propose a floral scent recognition using odor sensors and a odor display using odor distribution system. Proposed odor recognition has method of correlation coefficient between sensors that select optimal sensors in floral scent recognition system of selective multi-sensors. Proposed floral scent recognition system consists of four module such as floral scent acquisition module, optimal sensor decision module, entropy-based floral scent detection module, and floral scent recognition module. Odor distribution system consists of generation module of distribution information, control module of distribution, output module of distribution. We applied to floral scent recognition for performance evaluation of proposed sensors decision method. As a result, application of proposed method with floral scent recognition obtained recognition rate of 95.67% case of using 16 sensors while applied floral scent recognition system of proposed sensor decision method confirmed recognition rate of 96% using only 8 sensors. Also, we applied to odor display of proposed method and obtained 3.18 thorough MOS experimentation.

• 한국산업정보학회논문지
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• 제19권2호
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• pp.51-58
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• 2014

As WSNs(Wireless Sensor Networks) are being deployed widely in diverse application areas, their management and maintenance become more important. Recent sensor node software takes modular software architectures in pursuit of flexible software management and energy efficient reprogramming. To realize an flexible and efficient modular architecture particularly on resource constrained mote-class sensor nodes that are implemented with MCUs(Micro-Controller Units) of a single address space. an appropriate module linking model is essential to resolve and bind the inter-module global symbols. This paper identifies a design space of module linking model and respectively their implementation frameworks. We then establish a taxonomy for module linking models by exploring the design space of module linking models. Finally, we suggest an implementation framework respectively for each module linking model in the taxonomy. We expect that this work lays the foundations for systematic innovation toward more flexible and efficient modular software architectures for WSNs.

• 마이크로전자및패키징학회지
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• 제9권1호
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• pp.15-20
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• 2002

본 연구에서는 Dual Band휴대폰 전화기의 핵심부품인 Dual Band PLL Module의 무선회로 설계 기술, 초소형 설계기술, 표면실장기술, 소형화 SMD기술, Test기술 및 설계기반 마련 및 대외 경쟁력 있는 Dual PLL Module의 초소형화 기술을 확보하였다.

• 대한수학회보
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• 제46권6호
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• pp.1069-1077
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• 2009

In 1984, Oshiro [11] has studied the decomposition of continuous lifting modules. He obtained the following: every continuous lifting module has an indecomposable decomposition. In this paper, we study extending lifting modules. We show that every extending lifting module has an indecomposable decomposition. This result is an expansion of Oshiro's result mentioned above. And we consider some application of this result.

• 대한수학회보
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• 제58권2호
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• pp.497-505
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• 2021

Let R → S be a ring homomorphism. The relations of Gorenstein projective dimension with respect to a semidualizing module of homologically bounded complexes between U ⊗LR X and X are considered, where X is an R-complex and U is an S-complex. Some sufficient conditions are given under which the equality ${\mathcal{GP}}_{\tilde{C}}-pd_S(S{\otimes}{L \atop R}X)={\mathcal{GP}}_C-pd_R(X)$ holds. As an application it is shown that the Auslander-Buchsbaum formula holds for GC-projective dimension.

• 정보보호학회논문지
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• 제24권4호
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• pp.705-719
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• 2014

최근 금융기관의 리스크 관리 측면에서 운영리스크의 중요성이 점점 부각되고 있다. 특히 IT시스템 장애로 인한 금융서비스 중단의 경우는 고객 민원 및 이탈, 이익 감소 등의 결과로 이어질 수 있다. 따라서 금융기관에서는 IT 응용프로그램 장애 발생에 따른 영향을 최소화하기 위한 다양한 노력이 이루어지고 있다. 금융기관 IT시스템은 각 업무기능의 중복개발 배제 및 유지보수 효율성을 위해서 공통모듈을 사용하고 있다. 하지만 공통모듈에 장애가 발생하는 경우에는 해당 모듈을 사용하는 모든 업무가 영향을 받을 수 있는 리스크가 존재한다. 본 연구에서는 IT운영리스크 관점에서 리스크가 큰 공통모듈은 업무별로 분리하도록 하여 응용프로그램 장애에 따른 피해에 대응하고자 한다. 이를 위해서 공통모듈과 관련된 요인 변수의 분석을 진행하였고, 금융기관 IT운영리스크 감소를 위한 공통모듈 분리여부 판단 기준을 제안한다.

• 인터넷정보학회논문지
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• 제16권5호
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• pp.49-57
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• 2015

본 논문에서는 응용 맞춤형 그래픽 분할 실행 라이브러리에 기반한 효율적인 온라인 소프트웨어 서비스에 대하여 소개한다. 그래픽 분할 실행을 이용한 소프트웨어 서비스는 클라이언트 렌더링을 통하여 3D 그래픽 소프트웨어와 같은 고사양의 소프트웨어를 서버 기반의 온라인 소프트웨어 서비스로 제공할 수 있다. 그래픽 분할 실행은 서버에서 소프트웨어가 실행될 때, 그래픽 관련된 작업은 클라이언트의 GPU를 이용하여 처리하고, 데이터 관련 작업은 서버의 CPU를 이용하여 처리하는 방식이다. 그래픽 분할 실행 소프트웨어 서비스의 성능을 향상시키기 위하여, 비동기 전송 채널을 추가하고, 최적화 된 소프트웨어 공통 모듈과 소프트웨어 맞춤형 모듈을 기존의 그래픽 분할 실행 엔진에 추가한다. 이를 위하여, 본 논문에서는 그래픽 관련 API와 메시지들을 분석하여 소프트웨어 맞춤형 모듈을 구현하고, 서버 사이드 캐싱 방법을 통하여 최적화된 소프트웨어 공통 모듈을 구현하는 방법에 대하여 기술한다. 마지막으로, 성능 비교 실험을 통하여 개선된 분할 실행 엔진이 더 나은 성능을 가짐을 보여준다.

• 대한기계학회논문집A
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• 제31권3호
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• pp.395-402
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• 2007

This paper considers about the tilt measurement of lens module with multiple lenses. The tilt between lenses in lens module and barrel or between image sensor and barrel can be measured precisely with the proposed algorithm. The magnitude and direction of the tilt vector of lens and image sensor can be measured from the best focal surface. The selecting and setting of image sensor, test chart, image sensor centering to lens module, axis align, focus measure method are also explained to get highly precise tilt results. The proposed algorithm is verified with the lens module inspection system we developed, and the experimental results show that the tilt measure proposed in this paper is robust and precise. With the proposed tilt measurement algorithm, the tilt of an image sensor and any other lens which intermediates light can be measured.

• 한국막학회:학술대회논문집
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• 한국막학회 1995년도 제3회 하계분리막 Workshop (환경과 막분리 공정의 역할)
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• pp.27-38
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• 1995

Based on innovative membrane module concepts reverse osmosis and nanofiltration are going to become important instruments in environmental engineering. One example is the Disc-Tube-module and its application for the purification of landfill leachate. Currently over 45 different landfills are using this ROCHEM DT-module, in some cases combined with the high pressure reverse osmosis versions of this module, operating at up to 120 bar and 200 bar. This state of the art membrane technology and the DTF-module for nanofiltration, developed by ROCHEM on the basis of the DT-module and RO-systems for the purification of landfill leachate, make possible in hybrid processes permeate recovery rates of more than 97 % with concentration factors up to 40.