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7th International Conference on Software Paradigm Trends, ICSOFT 2012

作者： Cordeiro, José Hammoudi, Slimane van Sinderen, Marten INSTICC and IPS Department of Systems and Informatics Rua do Vale de Chaves Estefanilha 2910-761 Setübal Portugal Université d'Angers 10 Boulevard Jeanneteau - CS 90717 49107 Angers Cedex 2 France University of Twente Information Systems Group Department of Computer Science P.O.Box 217 7500 AE Enschede Netherlands

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The effect of surface polarity of gate dielectric buffer layer on operational stability in organic thin film transistors

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Digest of Technical Papers - SID International Symposium 2013年第1期44卷 1236-1238页

作者： Roh, Jeongkyun Kang, Chan-Mo Shin, Hyeonwoo Kwak, Jeonghun Jung, Byung Jun Lee, Changhee Department of Electrical and Computer Engineering Global Frontier Center for Multiscale Energy Systems Seoul National University 1 Gwanak-ro Gwanak-gu Seoul 151-742 Korea Republic of Department of Electronics Engineering Dong-A University 840 Hadan2-dong Saha-gu Busan 604-714 Korea Republic of Department of Materials Science and Engineering University of Seoul 163 Seoulsiripdaero Dongdaemun-gu Seoul 130-743 Korea Republic of

We studied the effect of surface polarity of gate dielectric buffer layer on operational stability in organic thin film transistors (OTFTs). By employing four types of polymers with different polarity, we found out the operational stability of OTFTs can be improved with low-polarity polymer gate dielectric buffer layer. With low-polarity polymers, the devices showed good operational stability with longer relaxation time than 106 sec. Also, threshold voltage of the devices shifted less than 2 V under high gate bias stress of 3 MV/cm for two hours. Good stability may be resulted from low surface trap density as well as good grain interconnection of pentacene on low-polarity polymer. © 2013 Society for Information Display.

关键词： Buffer layers

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LQ-servo congestion control for TCP/AQM system in wireless network environment

International Journal of Control and Automation

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International Journal of Control and Automation 2013年第3期6卷 281-290页

作者： Yang, Jihoon Lim, Dongkyun Oh, Wongeun Centre for Communication Systems Research University of Surrey Guildford Surrey GU2 7XH United Kingdom Computer Science Engineering Hanyang Cyber University 222 Wangshimni-ro Seongdong-gu Seoul 133-791 Korea Republic of Department of Multimedia Engineering Sunchon National University 255 Jungang-ro Suncheon Jeollanam-do 540-950 Korea Republic of

This paper presents LQ-Servo controller for congestion control in TCP/AQM wireless networks environment using previously developed controller. A wireless networks link has a capacity which is time-varying. For this, it is modeled by three-state mode for considering the dynamics of wireless links in this paper. And the proposed controller structure is made by augmenting a new state variable to the feed-forward loop.

关键词： Wireless networks

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Design of an electric power system with incorporation of a phased array antenna for OLFAR

Design of an electric power system with incorporation of a p...

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64th International Astronautical Congress 2013, IAC 2013

作者： Klein, J.M. Budianu, A. Bentunr, M.J. Engelen, S. Verhoeven, C.J.M. Department of Space Systems Engineering Faculty of Aerospace Engineering Delft University of Technology 2600 AA Delft Netherlands Telecommunication Engineering Group Faculty of Electrical Engineering Mathematics and Computer Science University of Twente 7500 AE Enschede Netherlands ASTRON P.O. Box 2 7900 AA Dwingeloo Netherlands Department of Microelectronics Faculty of Electrical Engineering Mathematics and Computer Science Delft Unversity of Technology 2628 CD Delft Netherlands

ISBN: (纸本)9781629939094

The Orbiting Low Frequency Antennas for Radio Astronomy (OLFAR) project is investigating the feasibility of an orbiting low frequency radio telescope. The radio telescope is formed using a swarm of nano-satellites equipped with astronomical antennas, conceivably orbiting the Moon or the second Lagrange-point of the Earth-Moon system. In these orbits, when at the far-side of the Moon as seen from the Earth, the low frequency radio signals originating from Earth are deemed to be blocked by the Moon, considerably reducing the amount of interference. Such a telescope, with its unique vantage point, will open up a new field in astronomical research;yet the power demands, as well as the data rates involved are very challenging. This paper details the design of the highly integrated Electric Power System (EPS) of an OLFAR satellite. The most demanding power mode of the mission is during exchange and pre-processing of science data. In this mode, each individual satellite has an average power consumption of 30W. Similar power demand is expected during the orbit transfer phases, in which the main electric thruster has a duty cycle close to unity, and places additional constraints on the attitude control of the satellite. Such power levels, for extended periods of time, have rarely been shown in such a small form factor. A phased antenna array is used for the downlink, and is constructed from an array of small-patch antennas, in order to achieve sufficient data rates. In an OLFAR satellite, the collection surface of the solar array is shared with this antenna. The tracking mechanism of solar array and antenna uses electric motors, to allow tracking the Sun or the ground station in a three-axis controlled attitude mode. The phased antenna array in turn allows fine pointing when required. The design of the Electric Power System is based on a Maximum Power Point Tracker-fed battery bank, using solar deployable panels. Care is taken to reduce the number of charge-discharge cycles

关键词： Electric power utilization

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Real-time navigation for a humanoid robot using particle filter

Real-time navigation for a humanoid robot using particle fil...

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2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012

作者： Baltes, Jacky Cheng, Chi Tai Lau, Meng Cheng Espínola, Andrés Autonomous Agents Lab Department of Computer Science University of Manitoba Winnipeg MB R3T 2N2 Canada Department of Electrical Engineering Tamkang University Tamsui Dist. New Taipei City 25137 Taiwan Mobile Robotics and Automated Systems Laboratory Universidad La Salle Benjamin Franklin 47 Mexico DF Mexico

ISBN: (纸本)9783037856123

This paper presents a practical real-time visual navigation system, including a vision system, a particle filter (PF) based localization system, and a path planning system, for humanoid robots in an indoor environment. A neural network (NN) converter system is used to solve the image distortion problem. The monocular vision system detects objects of interest in the scene, calculating their position in the image, and converting the position in the image to real world coordinates. The PF localization system estimates the current position by the robot's motion model and corrects the estimated position by using feedback from the data gathered by the vision system. The path planning system determines the next motion based on the result of the localization system. This paper uses a tree-like path planning method which not only guides the robot to the destination but also avoids obstacles at the same time. The navigation method allows a user to assign several different target destinations to the robot simultaneously. The proposed method is implemented on a humanoid robot "ROBOTIS DARwIn-OP", an open platform humanoid robot. The effectiveness of the system is demonstrated in an empirical evaluation. © (2013) Trans Tech Publications, Switzerland.

关键词： Bandpass filters

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Designing an SLA protocol with renegotiation to maximize revenues for the CMAC platform

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Combined Workshops on Web Information systems Engineering, WISE 2011 and WISE 2012

作者： Galati, Adriano Djemame, Karim Fletcher, Martyn Jessop, Mark Weeks, Michael Hickinbotham, Simon McAvoy, John Collaborative Systems and Performance Group School of Computing University of Leeds LS2 9JT United Kingdom Advanced Computer Architecture Group Department of Computer Science University of York YO10 5DD United Kingdom Cybula Ltd. R and D Team Science Park York YO10 5DD United Kingdom

ISBN: (纸本)9783642383328

The emerging transformation from a product oriented economy to a service oriented economy based on Cloud environments envisions new scenarios where actual QoS mechanisms need to be redesigned. In such scenarios new models to negotiate and manage Service Level Agreements (SLAs) are necessary. An SLA is a formal contract which defines acceptable service levels to be provided by the Service Provider to its customers in measurable terms. This is meant to guarantee that consumers' service quality expectation can be achieved. In fact, the level of customer satisfaction is crucial in Cloud environments, making SLAs one of the most important and active research topics. The aim of this paper is to explore the possibility of integrating an SLA approach for Cloud services based on the CMAC (Condition Monitoring on A Cloud) platform which offers condition monitoring services in cloud computing environments to detect events on assets as well as data storage services. © 2013 Springer-Verlag.

关键词： Customer satisfaction

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Feasibility analysis of transportation applications based on APIs of social network services

Feasibility analysis of transportation applications based on...

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2013 8th International Conference for Internet Technology and Secured Transactions, ICITST 2013

作者： Byon, Young-Ji Jeong, Young Seon Easa, Said M. Baek, Joonsang Department of Civil Engineering Khalifa University of Science Technology and Research Abu Dhabi United Arab Emirates Department of Industrial and Systems Engineering Khalifa University of Science Technology and Research Abu Dhabi United Arab Emirates Department of Civil Engineering Ryerson University 350 Victoria St. Toronto ON M5B 2K3 Canada Department of Electrical and Computer Engineering Khalifa University of Science Technology and Research PO Box 127788 Abu Dhabi United Arab Emirates

ISBN: (纸本)9781908320209

With increasing ownership of smartphones and membership of various social network services (SNS), new types of Advanced Traveler Information systems (ATIS) has become available to travelers. The smartphone enables mobile users to input and access real-time information while SNSs provide voluntarily collected personal information among networks of friends. Internet of Things (IoT) philosophy can be applied for connecting smartphone users for various transportation applications. This paper develops Facebook-based carpooling, and proposes Twitter-based traffic monitoring and Flickr-based incident reporting applications. The SNS services provide application programming interfaces (APIs) that allow external users to access their databases. The APIs provide a basis for the development of transportation applications for each service. Facebook can allow a group of friends to share a ride based on their attributes which are available in their personal information sections. Twitter can be used for sharing traffic conditions on the roads. Flickr can be customized as a geo-tagged collision reporting tool with real-time close-up photos of traffic collisions. It is found that available APIs are useful for implementing SNS-based transportation applications. It is also found that search times for carpooling partners vary with multiple factors: time-of-day, number of potential partners, and desired tolerance levels for location and time. © 2013 Infonomics Society.

关键词： Application programming interfaces (API)

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Annotation support for generic patches

Annotation support for generic patches

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2012 3rd International Workshop on Recommendation systems for Software Engineering, RSSE 2012

作者： Dotzler, Georg Veldema, Ronald Philippsen, Michael University of Erlangen-Nuremberg Computer Science Department Programming Systems Group Erlangen Germany

ISBN: (纸本)9781467317597

In large projects parallelization of existing programs or refactoring of source code is time consuming as well as error-prone and would benefit from tool support. However, existing automatic transformation systems are not extensively used because they either require tedious definitions of source code transformations or they lack general adaptability. In our approach, a programmer changes code inside a project, resulting in before and after source code versions. The difference (the generated transformation) is stored in a database. When presented with some arbitrary code, our tool mines the database to determine which of the generalized transformations possibly apply. Our system is different from a pure compiler based (semantics preserving) approach as we only suggest code modifications. Our contribution is a set of generalizing annotations that we have found by analyzing recurring patterns in open source projects. We show the usability of our system and the annotations by finding matches and applying generated transformations in real-world applications. © 2012 IEEE.

关键词： Semantics

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Performance of a multimode LTE/WiMAX transceiver including the Nonlinear Interference Suppressor

Performance of a multimode LTE/WiMAX transceiver including t...

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2013 IEEE Aerospace Conference, AERO 2013

作者： Suarez, Martha Habibi, Hooman Zlydareva, Olga Ling E, Pooh Department of Integrated Circuits and Systems Instytut Technologii Elektronowej Al. Lotnikow 32/42 02-668 Warsaw Poland Electrical Engineering Department Eindhoven University of Technology Den Dolec 2 5612 AZ Eindhoven Netherlands School of Computer Science and Informatics University College Dublin Belfield Dublin Ireland Catena Radio Design Bv Science Park Eindhoven Ekkersrijt 6040 5692 GA Son en Breugel Netherlands

ISBN: (纸本)9781467318112

This paper deals with the implementation of a Nonlinear Interference Suppressor (NIS) into a wireless LTE transceiver. This within the context of high energy efficient multi-standard transceivers controlled by a cognitive radio platform. In multimode transceivers, the transmitter for one communication standard may induce a large interferer in the receiver for another standard. To linearly suppress this interferer, which can be several orders of magnitude larger than the desired received signal, the receiver should have a very large linear dynamic range, resulting in excessive power consumption. For this reason, we consider the NIS, a closed-loop tuning method that exploits the locally available interference as side information. The wireless LTE transceiver model, includes all the baseband signal treatment blocks and the RF front-end of a low IF direct conversion receiver architecture. A mobile WiMAX signal is considered as the interference signal at the receiver. The obtained symbol error rate (SER) is observed for different system configurations. Matlab simulation results in this practical scenario show that the NIS can strongly suppress the interferer while a symbol error rate performance close to that of an exactly linear receiver is achieved. This results permit to identify perspective directions for the better multi-standard and high energy efficient transceivers implementation. © 2013 IEEE.

关键词： Cognitive radio

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Centrality and Composition of Four-node Motifs in Metabolic Networks

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Procedia computer science 2013年 18卷 409-418页

作者： Mahendra Piraveenan Kishan Wimalawarne Dharshana Kasthurirathn Centre for Complex Systems Research Faculty of Engineering and IT The University of Sydney NSW 2006 Australia Department of Computer Science Tokyo Institute of Technology 2-12-1 O-okayama Meguro-ku Tokyo 152-8552 Japan

Analysing subgraph patterns and recurring motifs in networks is a useful way to understand their local topology and func- tion. Motifs have been considered useful in analysing design patterns of networks as well. Three-node patterns (triads) in metabolic networks have been studied to some extent producing classification of organisms based on triads, but their network placement was not analysed. We obtain the frequencies of all four-node subgraphs in a wide range of metabolic networks. We construct significance profiles of subgraphs and employ correlation analysis to compare and contrast these profiles, highlight- ing four-node motifs. We then compute specific centrality measures of nodes involved in each subgraph, namely betweenness centrality and closeness centrality. We observe that multiple four-node motifs exist in metabolic networks. The correlation analysis shows that the significance profiles of Eukaryotic networks are highly correlated across organisms, whereas those of the Prokaryotic networks are correlated less so. The centrality indices of nodes that participate in identified network motifs are shown to be quite high. The analysis provides a tool to pinpoint the transition between evolution stages of Prokaryotic and Eukaryotic metabolic networks.

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