2,382 research outputs found
Social influence analysis in microblogging platforms - a topic-sensitive based approach
The use of Social Media, particularly microblogging platforms such as Twitter, has proven to be an effective channel for promoting ideas to online audiences. In a world where information can bias public opinion it is essential to analyse the propagation and influence of information in large-scale networks. Recent research studying social media data to rank users by topical relevance have largely focused on the “retweet", “following" and “mention" relations. In this paper we propose the use of semantic profiles for deriving influential users based on the retweet subgraph of the Twitter graph. We introduce a variation of the PageRank algorithm for analysing users’ topical and entity influence based on the topical/entity relevance of a retweet relation. Experimental results show that our approach outperforms related algorithms including HITS, InDegree and Topic-Sensitive PageRank. We also introduce VisInfluence, a visualisation platform for presenting top influential users based on a topical query need
Participatory Sensing Based Real-time Public Transport Information Service
Abstract—Modern cities continuously struggle with infrastructural
problems especially when the population is massively growing.
One affected area is public transportation. In default of offering
convenient and reliable service the passengers tend to consider
other transport alternatives. However, even a relatively simple
functional enhancement, such as providing real-time timetable
information, requires considerable investment and effort following
traditional means, e.g. deploying sensors and building a
background communication and processing infrastructure. Using
the power of crowd to gather the required data, share information
and send feedback is a viable and cost effective alternative. In
this demonstration, we present TrafficInfo, our prototype smart
phone application to implement a participatory sensing based
live public transport information service. TrafficInfo visualizes
the actual position of public transport vehicles with live updates
on a map, and gives support to crowd sourced data collection
and passenger feedback
Live Public Transport Information Service Using Crowdsourced Data (Demo Paper)
Abstract—Infrastructural problems of modern cities cannot
be solved through sheer power of will alone. The public transportation
system is one of the most effected parts and as the
situation is degrading, more and more people become reluctant
to take public transport. The fine tuning of the system, or even
its restructuring, requires an immense amount of data, which
traditionally can only be collected via costly and time consuming
ways, like deploying sensors, conveying surveys, just to name a
few. Not to mention that during this process, the citizens do not
experience too much improvement, and become easily skeptical
concerning the outcomes. Is there really no other way? In this
demo, we present and demonstrate our approach to solve this
problem in the form of a smart phone application providing
real-time feedback on public transport, transits, and user-reviews
based on crowdsensing
Semantic Web meets Web 2.0 (and vice versa): The Value of the Mundane for the Semantic Web
Web 2.0, not the Semantic Web, has become the face of “the next generation Web” among the tech-literate set, and even among many in the various research communities involved in the Web. Perceptions in these communities of what the Semantic Web is (and who is involved in it) are often misinformed if not misguided. In this paper we identify opportunities for Semantic Web activities to connect with the Web 2.0 community; we explore why this connection is of significant benefit to both groups, and identify how these connections open valuable research opportunities “in the real” for the Semantic Web effort
Context Aware Computing for The Internet of Things: A Survey
As we are moving towards the Internet of Things (IoT), the number of sensors
deployed around the world is growing at a rapid pace. Market research has shown
a significant growth of sensor deployments over the past decade and has
predicted a significant increment of the growth rate in the future. These
sensors continuously generate enormous amounts of data. However, in order to
add value to raw sensor data we need to understand it. Collection, modelling,
reasoning, and distribution of context in relation to sensor data plays
critical role in this challenge. Context-aware computing has proven to be
successful in understanding sensor data. In this paper, we survey context
awareness from an IoT perspective. We present the necessary background by
introducing the IoT paradigm and context-aware fundamentals at the beginning.
Then we provide an in-depth analysis of context life cycle. We evaluate a
subset of projects (50) which represent the majority of research and commercial
solutions proposed in the field of context-aware computing conducted over the
last decade (2001-2011) based on our own taxonomy. Finally, based on our
evaluation, we highlight the lessons to be learnt from the past and some
possible directions for future research. The survey addresses a broad range of
techniques, methods, models, functionalities, systems, applications, and
middleware solutions related to context awareness and IoT. Our goal is not only
to analyse, compare and consolidate past research work but also to appreciate
their findings and discuss their applicability towards the IoT.Comment: IEEE Communications Surveys & Tutorials Journal, 201
- …