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Signal Processing Magazine, IEEE

Issue 2 • Date March 2012

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Displaying Results 1 - 24 of 24
  • [Front cover]

    Publication Year: 2012 , Page(s): C1
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  • [Table of contents]

    Publication Year: 2012 , Page(s): 1
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  • Serving Our Research and Professional Communities Par Excellence [From the Editor]

    Publication Year: 2012 , Page(s): 2 - 4
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  • Editorial Board

    Publication Year: 2012 , Page(s): 2
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  • Value and Benefit [President's Message]

    Publication Year: 2012 , Page(s): 6
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  • SPS Members Recognized as Fellows and with Awards [Society News]

    Publication Year: 2012 , Page(s): 8 - 11
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  • Digital Signal Processing Gets Big Play in Music [Special Reports]

    Publication Year: 2012 , Page(s): 12 - 15
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (286 KB) |  | HTML iconHTML  

    If you happen to catch a performance of the two violinists, cellist, and viola player in the Borromeo String Quartet, you will find that those are not music stands you're seeing in front of the Borromeo String Quartet. They're MacBooks, allowing them to page back and forth using a foot pedal attached to a universal serial bus (USB) port and read the music from a full score (all four lines of the quartet together) rather than just their individual parts. View full abstract»

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  • Top downloads in IEEE Xplore [Reader's Choice]

    Publication Year: 2012 , Page(s): 16 - 19
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  • A Technical Revolution: Social Learning and Networking [From the Guest Editors]

    Publication Year: 2012 , Page(s): 20 - 21
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  • Studying Group Behaviors: A tutorial on text and network analysis methods

    Publication Year: 2012 , Page(s): 22 - 32
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (830 KB) |  | HTML iconHTML  

    Many important technical and policy decisions are made by small groups, especially by deliberative committees of technical experts. Such committees are charged with fairly combining information from multiple perspectives to reach a decision that one person could not make alone. Committees are social entities and are therefore affected by any number of mechanisms recorded in the social sciences. Our challenge is to determine which of these mechanisms are likely to be encountered in the deliberative process and to evaluate how they might impact upon decision outcomes. In particular, we examine the role of committee deliberations on the U.S. Food and Drug Administration's (FDA's) advisory panels. View full abstract»

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  • Understanding Community Dynamics in Online Social Networks: A multidisciplinary review

    Publication Year: 2012 , Page(s): 33 - 40
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (231 KB) |  | HTML iconHTML  

    Social network systems are significant scaffolds for political, economic, and sociocultural change. This is in part due to the widespread availability of sophisticated network technologies and the concurrent emergence of rich media Web sites. Social network sites provide new opportunities for social-technological research. Since we can inexpensively collect electronic records (over extended periods) of social data spanning diverse populations, it is now possible to study social processes on a scale of tens of million individuals. To understand the large-scale dynamics of interpersonal interaction and its outcome, this article links the perspectives in the humanities for analysis of social networks to recent developments in data intensive computational approaches. With special emphasis on social communities mediated by network technologies, we review the historical research arc of community analysis as well as methods applicable to community discovery in social media. View full abstract»

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  • The Evolution of Online Social Networks: A tutorial survey

    Publication Year: 2012 , Page(s): 41 - 52
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (369 KB) |  | HTML iconHTML  

    The ideas discussed in this article encapsulate research questions surrounding the dynamics of social networking and social cognitive theory. Economic behavior in an online social network is investigated and the impact of incentives on user activity is examined for different experimental designs such as single unit and multiunit auctions. View full abstract»

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  • Understanding Microeconomic Behaviors in Social Networking: An engineering view

    Publication Year: 2012 , Page(s): 53 - 64
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (761 KB) |  | HTML iconHTML  

    In this article, we use game theory to analyze and model human behaviors in a social network to achieve better system design. Such analysis and modeling is very general and can be applied to many social networks. From the discussion in this article, we can see that different game models should be used for different social networks with different types of interdependency. When designing a system, not only the system efficiency but also the fairness among users should be taken into account. Moreover, since users are rational and thus naturally selfish, they tend to overclaim what they may need and will not truly report their private information if cheating can improve their payoffs. Therefore, one should consider users' selfish nature and develop cheat-proof strategies to guarantee satisfactory system performance. View full abstract»

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  • Distributed Bayesian learning in multiagent systems: Improving our understanding of its capabilities and limitations

    Publication Year: 2012 , Page(s): 65 - 76
    Cited by:  Papers (16)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (589 KB) |  | HTML iconHTML  

    In this article, we study social networks of agents, where agents learn not only from private signals (i.e., signals only available to the agents receiving them), but from other agents too. Based on all the available information, agents modify their beliefs in events of interest and make decisions on which actions to take based on the beliefs. In doing so, they optimize functions that reflect some (cumulative) reward. This problem has been studied in various disciplines including control theory, operations research, artificial intelligence, game theory, information theory, economics, statistics, computer science, and signal processing. View full abstract»

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  • Modeling Dynamical Influence in Human Interaction: Using data to make better inferences about influence within social systems

    Publication Year: 2012 , Page(s): 77 - 86
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1012 KB) |  | HTML iconHTML  

    How can we model influence between individuals in a social system, even when the network of interactions is unknown? In this article, we review the literature on the “influence model,” which utilizes independent time series to estimate how much the state of one actor affects the state of another actor in the system. We extend this model to incorporate dynamical parameters that allow us to infer how influence changes over time, and we provide three examples of how this model can be applied to simulated and real data. The results show that the model can recover known estimates of influence, it generates results that are consistent with other measures of social networks, and it allows us to uncover important shifts in the way states may be transmitted between actors at different points in time. View full abstract»

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  • Security of online reputation systems: The evolution of attacks and defenses

    Publication Year: 2012 , Page(s): 87 - 97
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (421 KB) |  | HTML iconHTML  

    The Internet has created vast opportunities to interact with strangers. The interactions can be fun, informative, and even profitable [1]. However, there is also risk involved. Will an eBay seller ship the product in time? Is the advice from a self-proclaimed expert on Epinion.com trustworthy? Does a product from Amazon.com have high quality as described? View full abstract»

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  • In Tags We Trust: Trust modeling in social tagging of multimedia content

    Publication Year: 2012 , Page(s): 98 - 107
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1118 KB) |  | HTML iconHTML  

    Tagging in online social networks is very popular these days, as it facilitates search and retrieval of multimedia content. However, noisy and spam annotations often make it difficult to perform an efficient search. Users may make mistakes in tagging and irrelevant tags and content may be maliciously added for advertisement or self-promotion. This article surveys recent advances in techniques for combatting such noise and spam in social tagging. We classify the state-of-the-art approaches into a few categories and study representative examples in each. We also qualitatively compare and contrast them and outline open issues for future research. View full abstract»

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  • Challenges in Indoor Global Navigation Satellite Systems: Unveiling its core features in signal processing

    Publication Year: 2012 , Page(s): 108 - 131
    Cited by:  Papers (14)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1977 KB) |  | HTML iconHTML  

    Accurately determining one's position has been a recurrent problem in history [1]. It even precedes the first deep-sea navigation attempts of ancient civilizations and reaches the present time with the issue of legal mandates for the location identification of emergency calls in cellular networks and the emergence of location-based services. The science and technology for positioning and navigation has experienced a dramatic evolution [2]. The observation of celestial bodies for navigation purposes has been replaced today by the use of electromagnetic waveforms emitted from reference sources [3]. View full abstract»

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  • Time Modification and Variable Coding for Packet Transmission of Speech: Early Studies [DSP History]

    Publication Year: 2012 , Page(s): 132 - 140
    Multimedia
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4961 KB) |  | HTML iconHTML  

    This contribution to the history column of IEEE Signal Processing Magazine aims to give a selected sample of work and flavor of thinking in an era more than 30 years ago, when formative notions were being established and explored for packet transmission of speech. The exposition is parochial in that it relates to only one sector of activity; namely, that motivated by telecommunications research. Since that time, enormous advances have been made, technologies refined, methods modified, and capabilities expanded. The hope is that such a snapshot, albeit only from the author's perspective, contributes to expectations for the future. View full abstract»

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  • Bridging Social and Data Networks [Applications Corner]

    Publication Year: 2012 , Page(s): 141 - 145
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  • Social Efficiency: Rules for Designing Social Networks and Social Media [Social Sciences]

    Publication Year: 2012 , Page(s): 146 - 147
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (50 KB) |  | HTML iconHTML  

    Online social networks and social media are displacing traditional centrally organized media. More significantly, social media now represent the largest area of new information technology (IT) investment in many industries [1] and Gov 2.0 is well underway [2]. Companies and government see these new social media tools as ways to deliver better customer services, create better designs more cheaply, and provide better oversight and regulation. View full abstract»

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  • The DVB File Format [Standards in a Nutshell]

    Publication Year: 2012 , Page(s): 148 - 153
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (219 KB) |  | HTML iconHTML  

    The Digital Video Broadcasting (DVB) Project develops standards for television broadcast services. The DVB File Format, one of the recent DVB standards, is intended to be a recording format for received broadcasts and a file interchange format when recorded broadcasts are copied or moved from one DVB-compatible device to another. The DVB File Format is an extension of the ISO Base Media File Format (ISOBMFF), which is widely used as a basis format for various container formats, such as MPEG-4 File Format (MP4) and 3GP File Format (3GP) developed by the Moving Picture Experts Group (MPEG) and the Third Generation Partnership Project (3GPP), respectively. View full abstract»

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  • [Dates Ahead]

    Publication Year: 2012 , Page(s): 154
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  • The Challenge of Estimating Video Quality in Video Communication Applications [In the Spotlight]

    Publication Year: 2012 , Page(s): 160 - 158
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (119 KB) |  | HTML iconHTML  

    Video communication over the Internet has gone from science fiction to reality. Not only is video streaming and two-way video conferencing becoming common, but, as recently reported by the Associated Press through ABC News [1], today even broadcast television programs such as eyewitness news often use live video from camera phones or Skype on a notebook or desktop computer to interview people and share information. A desired goal in these scenarios is to ensure the best video quality possible. This leads to the challenge of estimating video quality as a key step to achieving the above. This article's goal is to describe the need for video quality estimation and why it is challenging as well as highlight the different types of video quality estimators (VQEs) being developed. Signal processing is viewed as critical throughout this work. View full abstract»

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Aims & Scope

IEEE Signal Processing Magazine publishes tutorial-style articles on signal processing research and applications, as well as columns and forums on issues of interest.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Min Wu
University of Maryland, College Park
United States 

http://www/ece.umd.edu/~minwu/