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检索条件"任意字段=Conference on Multimedia Content Access - Algorithms and Systems"

共 2023 条记录，以下是381-390 订阅

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Seamless Transitions between Filter Schemes for Location-Based Mobile Applications

Seamless Transitions between Filter Schemes for Location-Bas...

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conference on Local Computer Networks (LCN)

作者： Björn Richerzhagen Nils Richerzhagen Julian Zobel Sophie Schönherr Boris Koldehofe Ralf Steinmetz Multimedia Communications Lab (KOM) Technische Universität Darmstadt Germany

With a plethora of sensors and ubiquitous access to the Internet, modern smartphones have enabled a broad range of context-based applications. Most applications make use of the user's physical location to filter relevant content. However, filtering based on dynamic contextual information results in high complexity of the filtering process. This limits the applicability of existing publish/subscribe systems, as they rely on aggregation of filters and fast decentralized matching and forwarding. In this work, we propose a mechanism for transitions between different filter schemes for location-based services. Our mechanism adapts the filtering process to the dynamics in user behavior and resulting load by trading computational complexity at the broker against communication overhead and computational complexity at the mobile client. We integrate our mechanism into an existing publish/subscribe system and evaluate transitions between a context-based filter scheme and two channel-based filter schemes, showing the applicability of our approach.

关键词： Mobile communication Context Mobile applications Complexity theory Middleware Prototypes Protocols

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13th International conference on Ad-hoc Networks and Wireless, ADHOC-NOW 2014 accompanied by 2nd International Workshop on Emerging Technologies for Smart Devices, ETSD 2014, 2nd International Workshop on Marine Sensors and systems, MARSS 2014, multimedia Wireless ad hoc Networks, MWaoN 2014, Security in Ad Hoc Networks, SecAN 2014, 2nd Smart Sensor Protocols and algorithms, SSPA 2014 and 8th International Workshop on Wireless Sensor, Actuator and Robot Networks, WiSARN 2014

13th International Conference on Ad-hoc Networks and Wireles...

引用

13th International conference on Ad-hoc Networks and Wireless, ADHOC-NOW 2014 accompanied by 2nd International Workshop on Emerging Technologies for Smart Devices, ETSD 2014, 2nd International Workshop on Marine Sensors and systems, MARSS 2014, multimedia Wireless ad hoc Networks, MWaoN 2014, Security in Ad Hoc Networks, SecAN 2014, 2nd Smart Sensor Protocols and algorithms, SSPA 2014 and 8th International Workshop on Wireless Sensor, Actuator and Robot Networks, WiSARN 2014

ISBN: (纸本)9783662463376

The proceedings contain 25 papers. The special focus in this conference is on 2nd international workshop on emerging technologies for smart devices, ETSD 2014, 2nd international workshop on marine sensors and systems, MARSS 2014, multimedia wireless ad hoc networks 2014, MWaoN 2014, 2nd smart sensor protocols and algorithms - SSPA2014 and 8th international workshop on wireless sensor and actuator and robot networks - WiSARN 2014. The topics include: multimedia content delivery between mobile cloud and mobile devices;delayed key exchange for constrained smart devices;the time calibration system of KM3NET: the laser beacon and the nanobeacon;adaptive data collection in sparse underwater sensor networks using mobile elements;cross layer ant based routing protocol for wireless multimedia sensor network;access and resources reservation in 4G-VANETs for multimedia applications;a smart M2M deployment to control the agriculture irrigation;a location prediction based data gathering protocol for wireless sensor networks using a mobile sink;virtual localization for robust geographic routing in wireless sensor networks and micro robots for dynamic sensor networks.

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Gradient-based signatures for efficient similarity search in large-scale multimedia databases 15

Gradient-based signatures for efficient similarity search in...

引用

24th ACM International conference on Information and Knowledge Management, CIKM 2015

作者： Beecks, Christian M.S., Uysal J., Hermanns T., Seidl Data Management and Data Exploration Group RWTH Aachen University Germany

ISBN: (纸本)9781450337946

With the continuous rise of multimedia, the question of how to access large-scale multimedia databases efficiently has become of crucial importance. Given a multimedia database comprising millions of multimedia objects, how to approximate the content-based properties of the corresponding feature representations in order to carry out similarity search efficiently and with high accuracy? In this paper, we propose the concept of gradient-based signatures in order to aggregate content-based features of multimedia objects by means of generative models. We provide theoretical insights into our approach including closed-form expressions for the computation of gradient-based signatures with respect to Gaussian mixture models and additionally investigate different binarization methods for gradient-based signatures in order to query databases comprising millions of multimedia objects with high accuracy in less than one second.

关键词： Database systems

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A Recommender System Model based on Commodity-Purchase-Cycle Classification 16

A Recommender System Model based on Commodity-Purchase-Cycle...

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Proceedings of the 9th EAI International conference on Mobile multimedia Communications

作者： Meina Song Xue Zhou E. Haihong Zhonghong Ou Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781631901041

Recommender systems have been widely used in e-commerce platforms, such as Amazon and Taobao. Among the available recommendation algorithms, Item Collaborative Filtering (ItemCF) Algorithm and content Filtering Algorithm have gained wide adoption because of various strengths. For example, hidden interests can be digged so as to get fresh recommendations, and highly individual recommendations can be made. Despite their strengths and wide adoption, there are still some weaknesses associated with them. One representative weakness is the existence of duplicated, and outdated recommendations due to the lack of purchasing cycles, e.g., weekly or seasonal, of goods. We name such cycles Commodity Purchase Cycle (CPC), and propose a new recommendation algorithm based on CPC in this paper. We leverage CPC attributes to modify the collaborative filtering output rating matrix acquired by the ItemCF Algorithm, and take into consideration both user behaviors and commodity characteristics to make timely recommendations. We utilize a realistic dataset from Taobao to verify the performance of the proposed algorithm. Experimental results demonstrate good performance of CPC algorithm. Specifically, from the perspective of Root Mean Square Error (RMSE), the CPC Algorithm promotes the recommendation accuracy by 15%-20%, compared with the state-of-the-art ItemCF Algorithm.

关键词： Recommender System content Filtering ItemCF Commodity-Purchase-Cycle

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Solution for content interoperability among digital libraries for orthodox artefacts and knowledge 15

Solution for content interoperability among digital librarie...

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16th International conference on Computer systems and Technologies, CompSysTech 2015

作者： Paneva-Marinova, Desislava Goynov, Maxim Luchev, Detelin Pavlov, Radoslav Mathematical Linguistics Department Institute of Mathematics and Informatics Bulgarian Academy of Sciences Bulgaria Institute of Mathematics and Informatics BAS Acad. G. Bonchev Str. bl. 8 Sofia1113 Bulgaria

ISBN: (纸本)9781450333573

The paper presents a solution of content interoperability among three digital library systems keeping Orthodox artefacts and knowledge: Encyclopaedia Slavica Sanctorum Calendar, Bulgarian Iconographical Digital Library and multimedia Fund "BellKnow". The content of these environments is naturally complementing each other and the proposed content interoperability aims to provide better access to the objects and knowledge for all of the target users and also to provide mutual content enrichment. Copyright © 2015 ACM.

关键词： Web services

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multimedia content delivery between mobile cloud and mobile devices 13

Multimedia content delivery between mobile cloud and mobile ...

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作者： Jakimovski, Goran Karadimce, Aleksandar Davcev, Danco Skopje Macedonia Skopje Macedonia

ISBN: (纸本)9783662463376

The usage of mobile devices in everyday life poses new challenges for processing, adaptation and rendering of multimedia content, which can’t be accomplished due to mobile device limitations (battery lifetime, storage limitation, processing capacity and etc.). The proposed Mobile Cloud content Delivery (MCCD) framework shows how multimedia delivery applications and services can efficiently exploit the computing power of mobile cloud resources to achieve high efficient delivery of multimedia content. The experimental case study shows how local multimedia content from the mobile device can be offloaded and processed in the mobile cloud and the transformed multimedia content can be delivered back to the user’s mobile device. The case study further shows that using different communication protocols (EDGE, 3G and LTE) to offload media content to MCCD can significantly influence the turnaround computational time. © Springer-Verlag Berlin Heidelberg 2015.

关键词： multimedia services

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A hybrid content-learning management system for education and access to intangible cultural heritage 7

A hybrid content-learning management system for education an...

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7th International conference on Computer Supported Education, CSEDU 2015

作者： Glushkova, A. Katsouli, E. Kourvoulis, G. Manitsaris, A. Volioti, C. Laboratory of Multimedia and Computer Graphics Department of Applied Informatics University of Macedonia Egnatia Str.156 Thessaloniki Greece

ISBN: (纸本)9789897581076

This paper presents an open and extendable platform that provides access to ICH resources, enables knowledge exchange between researchers and contributes to the transmission of rare know-how from their holders to the next generations. The platform is a hybrid content-Learning Management system that permits the creation of new content of cultural heritage. It supports different user profiles for access, learning and analysis of the ICH, such as experts, learners, researchers as well as the large public. It is also supports the outcomes of sensorimotor learning functionalities of a game-based learning module. The platform integrates different modules based on multi-sensory technologies into an operating open-source content management system, which is enriched with a significant number of functionalities.

关键词： Knowledge management

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An evolved elastic resource virtualization algorithm for OFDMA-based wireless networks

An evolved elastic resource virtualization algorithm for OFD...

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International conference on multimedia, Communication and Computing Application, MCCA 2014

作者： Wei, J. Yang, K. Zhang, G. Hu, Z. School of Computer Science and Electronic Engineering University of Essex United Kingdom Internet of Things Research Centre China University of Mining and Technology Xuzhou China Beijing University of Posts and Telecommunications China

ISBN: (纸本)9781138027756

This article investigates an evolved elastic resource virtualization algorithm (E-ERVA) for Orthogonal Frequency-Division Multiple access (OFDMA) wireless communication systems. The objective of this algorithm is to maximize the total throughput with the constraints on individual virtual network’s (VN) data rate. This is achieved by assigning each VN a set of physical resource blocks (PRBs). We obtain the performance of the proposed algorithm in a frequency-selective fading environment. The simulation compares the throughput of elastic with static resource allocation algorithms. Furthermore, E-ERVA resource utilization and delivery ratio are evaluated. The simulation results show that E-ERVA performs better in throughput, and has higher spectral efficiency when compared to the static allocation algorithm. © 2015 Taylor & Francis Group, London.

关键词： Frequency division multiple access

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access and resources reservation in 4G-VANETs for multimedia applications 13

Access and resources reservation in 4G-VANETs for multimedia...

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作者： Garai, Mouna Mahjoub, Mariem Rekhis, Slim Boudriga, Noureddine Bettaz, Mohamed Communication Networks and Security Research Laboratory University of Carthage Tunis Tunisia Methods of Systems Design Laboratory National School of Computer Science Algiers Algeria

ISBN: (纸本)9783662463376

The development of Vehicular Ad-hoc Networks (VANET) has witnessed the release of various multimedia services and made it important to develop architectures and routing protocols capable of (a) handling the multimedia QoSs requirements and the real-time services’ constraints;(b) maximizing the network coverage;and (c) managing resources on the Road Side Units (RSUs), in order to guarantee the continuous delivery of real-time services. In this work, we provide a novel 4G-based VANET heterogeneous architecture, which integrates IEEE 802.11p and 3GPP LTE access networks, to provide access to multimedia services. A tree-based network access scheme is developed, providing a rapid connection and handover to highly mobility vehicles, and allowing to maximize at a large extent the network coverage beyond the area uncovered by RSUs (in the form of LTE eNodeBs). Techniques for the proactive resources provision on the RSUs, and the management of QoS-aware vertical and horizontal handovers, are developed. © Springer-Verlag Berlin Heidelberg 2015.

关键词： Vehicular ad hoc networks

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An overview of context types within multimedia and social computing 15

An overview of context types within multimedia and social co...

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16th International conference on Engineering Applications of Neural Networks, EANN 2015

作者： Mylonas, Phivos Ionian University Platia Tsirigoti 7 Corfu P.C. 49100 Greece

ISBN: (纸本)9781450331876

The importance of contextual information is widely acknowledged and has become a major topic of interest, investigation, and experimentation for quite some time, generating numerous papers and many scientific works. In this position paper we attempt to present the role of context, tackling it from the humanistic scope of its utilization within the modern social networking applications framework. Three major types of relevant contextual information may be identified in the literature, namely multimedia content retrieval and analysis systems that utilize the notion of context towards improved results, context-aware systems, and contextual semantics, i.e., works that utilize semantic technologies for mining and intelligent information access to social media. For each type we shall present a brief review of its context definition and modeling methods, as well as identify and discriminate its useful types focusing on multimedia computing applications. © 2015 ACM.

关键词： Knowledge representation

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