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Many methods have been proposed to determine influential nodes or links in network structures. However, most methods typically operate on a global scale with the assumption of static networks. Here a new ranking algorithm is proposed to find local influencers on Twitter that appear within the context of a specific event being discussed, incorporating the network dynamics as the event evolves with...
We present a new, efficient method for automatically detecting severe conflicts, `edit wars' in Wikipedia and evaluate this method on six different language Wikipedias. We discuss how the number of edits and reverts deviate in such pages from those following the general workflow, and argue that earlier work has significantly over-estimated the contentiousness of the Wikipedia editing process.
The performance of protocols for Massively MultiUser Virtual Environment (MMVE) systems is often correlated with object movement. Therefore, choosing appropriate movement data is a crucial factor in getting significant results when evaluating MMVE protocols. In this paper we identify characteristic parameters for mobility by conducting an analytical study of existing work about MMVE mobility. Based...
Crowd sourcing is evolving as a distributed problem-solving and business production model in recent years. In crowd sourcing paradigm, tasks are distributed to networked people to complete such that a company¡¦s production cost can be greatly reduced. A crowd sourcing process involves operations of both requesters and workers. A requester submits a task request, a worker selects and completes a task,...
Achieving required Sensing Spatial Coverage (SSC) is considered a main challenge in Wireless Sensor Networks (WSN). Earlier works used the asymptotic analysis to determine the required number of sensors to meet the necessary sensing coverage in a randomly deployed WSN. Recent works have shown that there is an overestimation in the asymptotic analysis and proposed other analytical solutions to overcome...
Location-based mobile applications such as Foursquare help bridge the gap between offline and online. People that we encounter and connect with around physical resources such as meetings, provide opportunities for extending our social networks. We investigate how social connections can be established and integrated with workplace resources using location through our application called Find & Connect,...
Social networking websites have become a vital means of communication that can provide information on various topics. The real time nature of the information published on social networking websites coupled with their accessibility as a publishing platform make them a powerful tool for information gathering. Furthermore, many individuals utilize these sorts of platforms to share their knowledge and...
This paper investigates the user requirements for ICTs to support elderly's social inclusion. We aim to illustrate the potential of social presence for fostering elderly's social interaction. Therefore, we present results of requirements analyses and define implications for the design of ICTs enabling social presence. Social presence is important, as it supports gaining a feeling of belonging to somebody...
Flagellated bacteria have been well understood in regards to its adhesion to surfaces and in swimming propulsion. However, its ability to be used as a source of propulsion for artificial microsystems is of great interest to the micro-robotics community; its high efficiency in converting chemical energy to motion is highly attractive for microsystems that demand a low payload and high rate of actuation...
Abnormal behavior detection in periodic operations and high-frame-rate (HFR) video logging were realized by introducing a visual machinery surveillance algorithm, which includes a phase-encoding process for periodic operations to match input images with pre-stored reference images efficientl. Assuming that the periodic machinery operations to be monitored are perfectly regular, the surveillance algorithm...
This paper presents the design and prototype of a camera-orienting mechanism. Bio-inspired actuators and mechanisms have been developed to pan and tilt a camera with comparable characteristics as a human eye. To meet the stringent space/weight requirement of mobile robotic applications, a compact camera-orienting mechanism is proposed. We specifically aim at matching the size of a human eye. Through...
In this work we propose a novel probabilistic flooding strategy for unstructured p2p networks. Our strategy takes into account the popularity of resources and the hop distance from the node that initiated the query. The latter is used to estimate the number of nodes reached by the query message. Based on the above parameters we adjust the forwarding probability at the time a node receives the query...
In this work the contribution of automatically-extracted (thus, imperfect) video structural semantics towards improving interactive video retrieval is examined. First, the automatic extraction of video structural semantics, i.e. the decomposition of the video into scenes that correspond to the different sub-stories or high-level events, is performed. Then, these are introduced to the interactive video...
In this paper we propose a multi-tiered full-size road vehicle steering controller that simultaneously considers kinematics and dynamics. The kinematic controller embeds a surface for converging to the desired path that is tuned based upon vehicle capability in order to provide robust yaw rate reference commands. The dynamic controller then establishes a sliding surface for yaw rate error convergence...
Content pollution is one of the major issues affecting P2P file sharing networks. However, since early studies on FastTrack and Overnet, no recent investigation has reported its impact on current P2P networks. In this paper, we present a method and the supporting architecture to quantify the pollution of contents in the KAD network. We first collect information on many popular files shared in this...
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