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Journal of Graph Algorithms and Applications 2015年第1期19卷 505-528页

作者： Larjomaa, Tommi Popa, Alexandru Department of Communications and Networking Aalto University School ofElectrical Engineering Aalto Finland School of Science and Technology Department of Computer Science Nazarbayev University Kazakhstan

In this paper we introduce and study a new problem named min-max edge q-coloring which is motivated by applications in wireless mesh networks. The input of the problem consists of an undirected graph and an integer q. The goal is to color the edges of the graph with as many colors as possible such that: (a) any vertex is incident to at most q different colors, and (b) the maximum size of a color group (i.e. set of edges identically colored) is minimized. We show the following results: Min-max edge q-coloring is NP-hard, for any q ≥ 2. A polynomial time exact algorithm for min-max edge q-coloring on trees. Exact formulas of the optimal solution for cliques and almost tight bounds for bicliques and hypergraphs. A non-trivial lower bound of the optimal solution with respect to the average degree of the graph. An approximation algorithm for planar graphs. © Journal of Graph Algorithms and Applications.

关键词： Color

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Real-Time Collaborative Routing Algorithm for Wireless Sensor Network Longevity

Real-Time Collaborative Routing Algorithm for Wireless Senso...

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IEEE International Symposium on Intelligent Control (ISIC)

作者： Shishir Bashyal Ganesh Kumar Venayagamoorthy Real-Time Power and Intelligent Systems Laboratory Department ofElectrical and Computer Engineering Missouri University of Science and Technology Rolla MO USA

ISBN: (纸本)9781424422241

Wireless sensor networks are being used in different scenarios including safety critical applications that require real-time communication framework such that the events detected by sensor nodes reach the base station within a limited timeframe. The ad-hoc nature of the sensor network makes it impossible to develop a static communication scheme that works well throughout the network lifetime. The network needs to be capable of adapting to the changes due to node failures and traffic congestions. This paper proposes an ant inspired dynamic routing algorithm in which individual sensor nodes collaborate with each other to discover a route that optimizes the network longevity while maintaining network delays to an acceptable level. Fuzzy logic is used to develop ant-like ability in sensor nodes to determine the suitability of the node to act as the cluster head. Using this algorithm, the nodes that are in the energy-rich region and have low end-to-end delay are more likely to be the cluster heads and thus the overall route offers lower communication delays and longer network life in terms of effective performance. As the algorithm relies on local collaboration for the route formation, the algorithm is highly scalable. Better end-to-end delay is achieved in simulation using this algorithm.

关键词： Availability Wireless sensor networks Delay Batteries Clustering algorithms Robot sensing systems Collaboration

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Rule-based Dynamic Business Process Modification and Adaptation

Rule-based Dynamic Business Process Modification and Adaptat...

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International Conference on Information Networking

作者： Sanghyun Yoo Yo-han Roh In-Chul Song Joo Hyuk Jeon Myoung Ho Kim Hak Soo Kim Jin Hyun Son Young Sang Paik Joo Hyun Han Hyun Ki Jang Department ofElectrical Engineering and Computer Science Korea Advanced Institute of Science and Technology Daejeon South Korea Department ofComputer Science and Engineering Hanyang University Ansan South Korea Ubiquitous Computing Laboratory IBM Korea Seoul South Korea

ISBN: (纸本)9788996076117

The advances in ubiquitous computing technologies have given rise to the u-Business, where we obtain business-related context information from ubiquitous devices to adapt to the changes of business environments in a timely manner. In these rapidly changing u-Business environments, we need a mechanism to modify business process schemas, which represent a group of business activities arranged in a meaningful way to give values to the u-Business. We also need a way to migrate running process instances to their new business process schemas. In this paper, we propose a rule-driven approach for dynamic business process schema modification and instance adaptation. The proposed approach uses rules to describe schema modification operations to be applied and rule execution conditions. Business environment changes are encoded in these rules, thus timely schema modification is possible. We also propose a system architecture for realizing this rule-driven approach. We have designed the system architecture by utilizing existing technologies so that the system can be easily implemented.

关键词： Business Ubiquitous computing computer architecture Concrete computer science Pervasive computing Context-aware services Environmental management Runtime Prototypes

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Improving the Adaptive Systems Using Ontologies and Semantic Web Technologies

Improving the Adaptive Systems Using Ontologies and Semantic...

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International Conference on Innovations in Information Technology

作者： Martin Balik Ivan Jelinek Department of Computer Science and Engineering Faculty ofElectrical Engineering Czech Technical University Prague Czech Republic

Adaptation is often a discussed topic in the field of web technologies. There is a need to personalize the information presented to the user. One of the primary problems is how to store the content within the system. The information should be understandable not only to the users who use the system, but also to the computers which prepare the data for the users. This can be achieved through the use of semantic web technologies. We propose a model for adaptive systems based on semantic representation and ontologies. We will describe the architecture of our general metamodel for adaptive systems and also our simple implementation of an e-learning system, which will be continuously extended to verify our research. We aim to create a formal description of a model, which will enable interchange of data, reuse of information and personalized search.

关键词： Adaptive systems Ontologies Semantic Web Electronic learning Testing Adaptation model computer science computer architecture Electronic commerce Java

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Face Recognition using 3D Line Edge Map Robust to Expression Changes and Occlusions

Face Recognition using 3D Line Edge Map Robust to Expression...

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International Conference on Advanced Communication Technology (ICACT)

作者： Hye-mi Kim Ho-Chul Shin Seong Dae Kim Electronics and Telecommunications Research Institute South Korea Department ofElectrical Engineering & Computer Science South Korea

We propose new face recognition algorithm using 3D line edge map as combining 3D information on the edge obtained by stereo camera and the conventional line edge map algorithm. As a similarity measure of 3D line edge map, weighted partial and spatially well-localized line segment Hausdorff distance (WPSLHD) is proposed. WPSLHD is a measure which is robust to expression changes, facial occlusions, and depth outliers. The proposed face recognition system performances are evaluated under expression changes and facial occlusions.

关键词： Face recognition Robustness Cameras Image segmentation Humans Lighting Face detection Data mining computer science Performance evaluation

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Development Of pCO2 Analytic System Using Soft-Lithography Method

Development Of pCO2 Analytic System Using Soft-Lithography M...

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IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)

作者： Kyung-Chan Kim Byoung-Ho Kang Do-Eok Kim Dae-Hyuk Kwon Jong-Hee Lee Shin-Won Kang Department ofElectronic Engineering Kyungpook National University South Korea School ofElectronic Information and Communication Engineering Kyungil University South Korea Division ofMobile Multimedia Yeungnam College of Science and Technology South Korea School ofElectrical Engineering and Computer Science Kyungpook National University South Korea

This study carried out development of non-invasive optical transcutaneous partial pressure of carbon dioxide, pCO 2 , monitoring system by non-dispersive infrared method, NDIR. The purpose of this system is to detect CO 2 from outer skin, not from the arterial blood-gathering method. There are advantages about a reduction of analysis time and real-time monitoring that this system might be available. The measurement system is composed of the IR lamp, the pyroelectric sensor including a 4.26 mum optical filter, the optical gas reaction chamber and the signal processing circuit. The optical reaction length of chamber was reduced by 1 mm using the soft-lithography method which CO 2 is exhausted in human body as we considered. The fabricated pCO 2 monitoring system showed linear result of 6.50times 10 -6 absorbance/ppm sensitivity for CO 2 concentration from 0 ~ 5,000 ppm by MFC and about 2 seconds of fast response time. The proposed system can be used in the optical biosensor field for the medical diagnosis such as pCO 2 monitoring system and environment monitoring systems.

关键词： Optical filters Optical sensors Optical signal processing Biomedical optical imaging Gas detectors Biomedical monitoring Carbon dioxide Infrared surveillance Skin Real time systems

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I-V Characteristic of the Au Nanorod According to the Contact Materials

I-V Characteristic of the Au Nanorod According to the Contac...

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IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)

作者： Kyu-Jin Kim Byoung-Ho Kang Do-Eok Kim Won-Seok Kang Jae-Ho Kim Dae-Hyuk Kwon Jung-Hee Lee Shin-Won Kang Department ofElectronic Engineering Kyungpook National University South Korea Department of Molecular Science and Technology Ajou University South Korea School of Molecular Science and Technology Ajou University South Korea School of Electronic Information and Communication Engineering Kyungil University South Korea School ofElectrical Engineering and Computer Science Kyungpook National University South Korea

The authors had manufactured the Au nanorod by electrochemical deposition (ECD) method. ECD method has many advantages that it can make the nanorod using the various materials having the dipole and it can make the hetero structure of nanorod. The nanorods have a good round shape with 7 mum height and 200 nm thick. To measure the characteristics of the nanorod, measurement electrode pattern is fabricated on the oxide layer. Electrode pattern was suggested to catch many nanorods randomly and materials of the pattern were used by the gold and titanium considering the work function of the nanorods. Basically, I-V characteristic of the Au was measured in the state of ohmic contact. The resistance of the Au nanorod was about 280 Omega and I-V curve was not measured over the 0.54 V. Confirming the optical microscope, Au nanorod was broken by the specific factor such as heating or excessive current.

关键词： Gold Electrodes Electrical resistance measurement Optical microscopy Manufacturing Nanostructures Shape Nanostructured materials Titanium Ohmic contacts

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Design and Evaluation of the Nanorod Arrangement Pattern using Electro-magnetic Field Effect

Design and Evaluation of the Nanorod Arrangement Pattern usi...

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IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)

作者： Heng Yuan Hyurk-Choon Kwon Kyu-Jin Kim Woo-Jin Cho Jong-Hee Lee Jae-Ho Kim Eung-Soo Kim Shin-Won Kang Department ofElectronic Engineering Kyungpook National University South Korea Division ofMobile Multimedia Yeungnam College of Science and Technology South Korea School ofMolecular Science and Technology Ajou University South Korea Division ofDigital Information Engineering Pusan University of Foreign Studies South Korea School ofElectrical Engineering and Computer Science Kyungpook National University South Korea

In this study, for arranging the nanorod which fabricated by electro-chemical deposition (ECD) method, a nanorod arrangement simulation had been prepared on the basis of dielectrophoresis (DEP) principle. Following the simulation a nanorod arrangement device was designed and fabricated to verify the result of the simulation. After that, nanorod was arranged on the electrodes as AC voltage loading. As the result, the rate of the nanorod arrangement was 20.35 %.

关键词： Nanobioscience Dielectrophoresis Nanoscale devices Voltage Dielectric constant Design engineering Computational modeling Electrodes Frequency Shape

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A Cold Cathode Fluorescent Lamp Driving Circuit without a Transformer for Liquid Crystal Display Backlight Unit

A Cold Cathode Fluorescent Lamp Driving Circuit without a Tr...

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International Conference on Power Electronics

作者： Eun-Seok Choi Je-Hyung Cho Hyun-Ki Yoon Gun-Woo Moon Myung-Joong Youn Department of Electrical Engineering and Computer Science KAIST 373-1 Guseong-Dong Yuseong-Gu Daejeon Korea Department ofElectrical Engineering and Computer Science KAIST 373-1 Guseong-Dong Yuseong-Gu Daejeon Korea Department of Electrical Engineering andComputer Science KAIST 373-1 Guseong-Dong Yuseong-Gu Daejeon Korea

ISBN: (纸本)9781424418718

A cold cathode fluorescent lamp driving circuit without a transformer for liquid crystal display backlight unit is proposed. Commonly, a CCFL driver has a transformer with high turn ratio to step up low input voltage to high sinusoidal lamp voltage. This high voltage and high turn ratio transformer has large size and high cost. The proposed CCFL driving circuit which is based on parallel-loaded resonant topology features simplicity, so it reduces complexity and cost of overall system. And the proposed circuit with asymmetric control has dimming capability by duty control. In this paper, the analyses of the proposed CCFL driving circuit and experimental results for BLU of 32-inch commercial LCD TV are presented.

关键词： Transformer driver circuits turn ratio Input Voltage ZMYND10 gene cold cathodes fluorescent lamps

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Overlay of broadcasting signal in a WDM-PON

Overlay of broadcasting signal in a WDM-PON

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Optical Fiber Communication (OFC) Conference

作者： Jung-Hyung Moon Ki-Man Choi Chang-Hee Lee Department ofElectrical Engineering and Computer Science Korea Advanced Institute of Science and Technology Daejeon South Korea

We demonstrate an overlay method for broadcasting signal transmission in a wavelength division multiplexed-passive optical network. We used a low noise broadband light source based on mutually injected Fabry-Perot las... 详细信息

ISBN: (纸本)1557528020

关键词： Broadcasting Arrayed waveguide gratings Optical noise Optical fiber networks Optical receivers Passive optical networks Multimedia communication Light sources Fiber nonlinear optics Nonlinear optics

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