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International Workshop on Semantic Media Adaptation and Personalization (SMAP)

作者： Gerasimos Razis Ioannis Anagnostopoulos Michalis Vafopoulos Computer Science and Biomedical Informatics Dpt. University of Thessaly Lamia Greece NCSR “Demokritos” Software and Knowledge Engineering Laboratory Athens Greece

ISBN: (纸本)9781467383967

In this paper, we propose an ontology schema towards linking semantified Twitter social analytics with the Linked Open Data cloud. The ontology is deployed over a publicly available service that measures how influential a Twitter account is by combining its social activity in Twitter. According to our knowledge this is the first work that combines social analytics with the Linked Open Data (LOD) cloud.

关键词： Twitter Ontologies Resource description framework Measurement Semantics Tagging

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Tunable Acoustic-Wave-Lumped-Element Resonator (AWLR)-Based Bandpass Filters

Tunable Acoustic-Wave-Lumped-Element Resonator (AWLR)-Based ...

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IEEE MTT-S International Microwave Symposium

作者： Dimitra Psychogiou Roberto Gomez-Garcia Dimitrios Peroulis School of Electrical and Computer Engineering Birck Nanotechnology Center Purdue University West Lafayette IN 47907 USA Dpt. of Signal Theory and Communications University of Alcala Alcala de Henares 28871 Madrid Spain

ISBN: (纸本)9781509006991

Hybrid acoustic-wave-lumped-element resonator (AWLR)-based bandpass filters (BPFs) with reconfigurable bandwidth (BW) and tunable out-of-band isolation (IS) are reported in this paper. They are based on a new BPF architecture in which the AWLRs are in-parallel cascaded to an all-pass network through variable lumped-element (LE) impedance inverters. In this manner, passbands with arbitrarily-large BW - i.e., no longer limited by the electromechanical coupling coefficient (k_t~2) of its constituent acoustic-wave resonators (AWRs)-can be created and continuously controlled whilst preserving the high-quality-factor (Q: order of 10,000) characteristics of the AWR. Furthermore, tuning of the out-of-band IS is obtained by adjusting the location of the AWLRs transmission zeros (TZs: 2N for an N-pole BPF) through variable LE capacitors. The operating principles of the devised AWLR-based tunable BPF concept are experimentally validated through a three-pole/six-TZ prototype at 418 MHz made up of commercially-available surface acoustic wave (SAW) resonators and LEs. It exhibits tunable BW between 0.16-0.49 MHz (0.5-1.5k_t~2), minimum in-band insertion loss (IL) between 3.3-1.2 dB (effective Q >10,000), and out-of-band IS reconfigurability.

关键词： Acoustic wave filter Bandpass filter (BPF) Bandwidth tuning K_t~2 enhancement RF filter SAW filter Surface acoustic wave (SAW) resonator Tunable filter

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Hierarchical topic models for language-based video hyperlinking 3

Hierarchical topic models for language-based video hyperlink...

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3rd Workshop on Speech, Language and Audio in Multimedia, SLAM 2015

作者： Simon, Anca-Roxana Sébillot, Pascale Bois, Rémi Morin, Emmanuel Gravier, Guillaume Moens, Sien Univ. Rennes 1 IRISA amd Inria Rennes France INSA Rennes IRISA and Inria Rennes France CNRS IRISA Inria Rennes France Univ. Nantes LINA France KU Leuven Computer Science Dpt. Belgium

ISBN: (纸本)9781450337496

We investigate video hyperlinking based on speech transcripts, leveraging a hierarchical topical structure to address two essential aspects of hyperlinking, namely, serendipity control and link justification. We propose and compare different approaches exploiting a hierarchy of topic models as an intermediate representation to compare the transcripts of video segments. These hierarchical representations offer a basis to characterize the hyperlinks, thanks to the knowledge of the topics who contributed to the creation of the links, and to control serendipity by choosing to give more weights to either general or specific topics. Experiments are performed on BBC videos from the Search and Hyperlinking task at MediaEval. Link precisions similar to those of direct text comparison are achieved however exhibiting different targets along with a potential control of serendipity. © 2015 ACM.

关键词： Hypertext systems

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On partitioning-based optimisations in expressive fuzzy Description Logics

On partitioning-based optimisations in expressive fuzzy Desc...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Fernando Bobillo Umberto Straccia Dpt. of Computer Science and Systems Engineering University of Zaragoza Spain ISTI-CNR Istituto di Scienza e Tecnologie dell' Informazione Pisa Italy

Fuzzy Description Logics (DLs) are a formalism for the representation of structured knowledge affected by imprecision or vagueness. A key factor in the practical success of fuzzy DLs is the availability of highly implemented reasoners. This paper studies two optimisation techniques (ABox partitioning based on individual groups and optimisation problem partitioning) in the setting of the fuzzy ontology reasoner fuzzy DL. We study the applicability of these techniques in expressive fuzzy DL languages, proposing a new strategy, and perform an empirical evaluation proving that they are not helpful in practice so far.

关键词： Optimization Semantics Cognition Fuzzy logic Description logic Standards

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High-Q bandpass filters using hybrid acoustic-wave-lumped-element resonators (AWLRs) for UHF applications

High-Q bandpass filters using hybrid acoustic-wave-lumped-el...

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Microwave, MTT-S International Symposium

作者： Dimitra Psychogiou Roberto Gómez-García Dimitrios Peroulis School of Electrical and Computer Engineering Purdue University West Lafayette IN USA Dpt. of Signal Theory and Communications University of Alcalá Madrid Spain

This paper focuses on a new family of narrow-band bandpass filters, along with its coupling-matrix-based design approach which feature quasi-elliptic frequency response, effective quality factors (Qs eff ) of the order of 1,000 and small form factors. Hybrid acoustic-wave-lumped-element resonator (AWLR) architectures are proposed as fundamental elements of these filters leading to low-loss passbands with fractional bandwidth (FBW) that is much broader (3.8-7.5 times) than in all acoustic wave (AW) filters and Qs eff that are 10-20 times larger than in traditional lumped-element filters. Experimental prototypes based on commercially-available surface acoustic wave (SAW) resonators were built and tested at 418 MHz. Measured Qs eff between 750-1550 and bandwidths ranging from 0.65 to 0.94 MHz (i.e., 2-3 times the electromechanical coupling coefficient of the AW resonator) are presented.

关键词： Acoustic measurements Surface acoustic waves Inverters Radio frequency

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POIViz: A Fast Interactive Method for Visualizing a Large Collection of Open Datasets

POIViz: A Fast Interactive Method for Visualizing a Large Co...

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International Conference on Information Visualisation (IV)

作者： T. Liu F. Bouali G. Venturini University Francois-Rabelais of Tours Computer Science Laboratory Tours France IUT Dpt. STID University of Lille2 France

We study in this paper the visualization of large multidimensional datasets with a focus on Open Data. Starting from our early work in which we defined a visualization based on points of interest, we improve this method in several ways with the aim of dealing with larger datasets and especially Open datasets. We propose the parallelization, using CPU and GPU, of the most costly steps of our method, like the computation of the data layout. We improve the visualization with a density rendering so as to keep the display informative for large datasets and for Open Data. We propose a layered visualization with interactions that can support several users tasks such as data filtering and labeling. We show that, even with common hardware, the performances of our approach are such that any user graphical queries can be processed in a few seconds. We detail how we were able to visualize and explore a collection of 300,000 Open datasets from the French Open Data web site. With the resulting visualization, we were able to improve our previous results.

关键词： Data visualization Layout Rendering (computer graphics) Graphics processing units Visualization Labeling Transfer functions

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Towards an opportunistic, socially-driven, self-organizing, cloud networking architecture with NovaGenesis 2

Towards an opportunistic, socially-driven, self-organizing, ...

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2nd International Workshop on Emerging Software as a Service and Analytics, ESaaSA 2015 - In conjuction with the 5th International Conference on Cloud Computing and Services science - CLOSER 2015

作者： Alberti, Antonio M. Moreira, Waldir Da Rosa Righi, Rodrigo Neto, Francisco J. Pereira Dobre, Ciprian Singh, Dhananjay ICT Laboratory Instituto Nacional de Telecomunicações - INATEL Santa Rita do Sapucaí Minas Gerais Brazil COPELABS Univ. Lusófona Lisbon Portugal PIPCA Universidade do Vale do Rio dos Sinos São Leopoldo Rio Grande do Sul Brazil Computer Science Dpt. Univ. Politechnica of Bucharest Bucharest Romania Electronics Eng. Dpt. Hankuk Univ. of Foreign Studies Yongin Korea Republic of

ISBN: (纸本)9789897581106

The exponential growth on the number of mobile devices and their capabilities are leveraging new possibilities of networking architectures for processing, storing, and exchanging of information. At a glance, existing architectures take advantage of these devices, the social behavior of their users, and/or the dynamicity on resource usage. Despite of the potential of existing initiatives, they do not interoperate which reduce their applications and deployment. As we walk towards a very dynamic world (regarding the user needs and characteristics, the information traversing the network, and the networking capability to adaptation at both users features and content of the demands levels), these architectures should merge into a solution that fits any type of scenario. In this paper, we specify an opportunistic, socially-driven, self-organizing, cloud networking architecture using a future Internet proposal named NovaGenesis. We highlight the requirements and solutions that NovaGenesis brings to accommodate the inherent challenges of today's dynamic networking scenario. Thus, we describe a convergent architecture, which integrates the new requirements with the already implemented NovaGenesis features.

关键词： Memory architecture

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Navigating among educational resources in the web of linked data

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2014年 8741卷 185-190页

作者： Koutsomitropoulos, Dimitrios A. Solomou, Georgia D. Kalou, Aikaterini K. Computer Engineering and Informatics Dpt. School of Engineering University of Patras Building B Patras-Rio26500 Greece

Linked Data seem to play a seminal role in the establishment of the Semantic Web as the next-generation Web. This is even more important for digital object collections and educational institutions that aim not only to promote and disseminate their content but also to aid its discoverability and contextualization. Having already ‘semantified’ a popular digital repository system, DSpace, in this paper we show how repository metadata can be exposed as Linked Data, thus enhancing their machine understandability and contributing to the LOD cloud. Our effort comes complete with an updated UI that allows for reasoning-based search and navigation between linked resources within and outside the scope of the digital repository. © Springer International Publishing Switzerland 2014.

关键词： Linked data

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Design environment for hardware generation of SLFF neural network topologies with ELM training capability

Design environment for hardware generation of SLFF neural ne...

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IEEE International Conference on Industrial Informatics (INDIN)

作者： José-Miguel Martínez-Villena José-Vicente Francés-Víllora Alfredo Rosado-Muñoz Manuel Bataller-Mompeán Juan-Francisco Guerrero-Martínez Marek Wegrzyn Marian Adamski GPDS. Dpt. Electronic Engineering Universitat de Valencia Burjassot Valencia Spain Institute of Computer Engineering and Electronics University of Zielona Góra Poland

Extreme Learning Machine (ELM) is a noniterative training method suited for Single Layer Feed Forward Neural Networks (SLFF-NN). Typically, a hardware neural network is trained before implementation in order to avoid additional on-chip occupation, delay and performance degradation. However, ELM provides fixed-time learning capability and simplifies the process of re-training a neural network once implemented in hardware. This is an important issue in many applications where input data are continuously changing and a new training process must be launched very often, providing self-adaptation. This work describes a general SLFF-NN design environment to assist in the definition of neural network hardware implementation parameters including real-time ELM training. The software design environment uses initial user-provided input data with information about the type of problem: sample dataset and validated results, input fields, accuracy; and, together with simulation tools, recommends the optimum configuration for the neural topology and automatically generates synthesizable code for the hardware implementation tool. This is possible due to the design of parameter-dependent synthesis code and optimal hardware architecture design for both neural network and ELM training. Results show all the steps required to follow a successful design flow from the software tool to the final running device and, as an application example, the FPGA implementation for realtime detection of brain area in electrode positioning during a Deep Brain Stimulation (DBS) surgery is shown.

关键词： Random access memory Hardware Training Biological neural networks Topology Neurons Artificial neural networks

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Aspects of quality evaluation in Linguistic Descriptions of Data

Aspects of quality evaluation in Linguistic Descriptions of ...

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IEEE International Conference on Fuzzy Systems

作者： Alberto Bugarin Nicolas Marin Daniel Sanchez Gracian Trivino Research Center on Information Technologies University of Santiago de Compostela Dpt. Computer Science and AI University of Granada European Centre for Soft Computing

ISBN: (纸本)9781467374293

Quality evaluation is a fundamental problem in the field of linguistic description of data. In this work, we analyze the concept of quality and study different approaches to measure quality. Although most of the approaches considered focused on time series data, that are one of the most frequent datasets in real application domains, they can be used for quality assessment of linguistic descriptions generated for any type of data.

关键词： Pragmatics Measurement Time series analysis Quality assessment Context Electronic mail Proposals

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