40 research outputs found
Precursors and Laggards: An Analysis of Semantic Temporal Relationships on a Blog Network
We explore the hypothesis that it is possible to obtain information about the
dynamics of a blog network by analysing the temporal relationships between
blogs at a semantic level, and that this type of analysis adds to the knowledge
that can be extracted by studying the network only at the structural level of
URL links. We present an algorithm to automatically detect fine-grained
discussion topics, characterized by n-grams and time intervals. We then propose
a probabilistic model to estimate the temporal relationships that blogs have
with one another. We define the precursor score of blog A in relation to blog B
as the probability that A enters a new topic before B, discounting the effect
created by asymmetric posting rates. Network-level metrics of precursor and
laggard behavior are derived from these dyadic precursor score estimations.
This model is used to analyze a network of French political blogs. The scores
are compared to traditional link degree metrics. We obtain insights into the
dynamics of topic participation on this network, as well as the relationship
between precursor/laggard and linking behaviors. We validate and analyze
results with the help of an expert on the French blogosphere. Finally, we
propose possible applications to the improvement of search engine ranking
algorithms
Precursors and Laggards: An Analysis of Semantic Temporal Relationships on a Blog Network
We explore the hypothesis that it is possible to obtain information about the
dynamics of a blog network by analysing the temporal relationships between
blogs at a semantic level, and that this type of analysis adds to the knowledge
that can be extracted by studying the network only at the structural level of
URL links. We present an algorithm to automatically detect fine-grained
discussion topics, characterized by n-grams and time intervals. We then propose
a probabilistic model to estimate the temporal relationships that blogs have
with one another. We define the precursor score of blog A in relation to blog B
as the probability that A enters a new topic before B, discounting the effect
created by asymmetric posting rates. Network-level metrics of precursor and
laggard behavior are derived from these dyadic precursor score estimations.
This model is used to analyze a network of French political blogs. The scores
are compared to traditional link degree metrics. We obtain insights into the
dynamics of topic participation on this network, as well as the relationship
between precursor/laggard and linking behaviors. We validate and analyze
results with the help of an expert on the French blogosphere. Finally, we
propose possible applications to the improvement of search engine ranking
algorithms
Media sharing websites and the US financial markets
Recently, one of the main issues of concern within the world wide web is the understanding of web 2.0 mass
collaboration systems. These systems have emerged in recent years and gained enormous popularity. It must, however, be
pointed out, that the potential and practical application of web 2.0 are still not well understood and deserve academic
attention. In this paper we investigate the online media sharing collaborative community and its applications for uses in
stock market analysis and prediction. Specifically, we look at Youtube.com, one of the most popular social media sharing
websites. The association with stock market behaviour and usage patterns are investigated. This work became of more
interest and significance with the recent credit crunch crisis. The data under investigation is novel, and to our knowledge,
this paper reports the first investigation of its kind to the use of collaborative media sharing website for stock market
analysis. We find significant association between video meta-data and textual data using a content driven sentiment text
mining approach. The results are very encouraging and importantly highlight efficient information transfer to online
media sharing communities as there seems to be predictive value in youtube data
Are Emotions Enumerable or Decomposable? And its Implications for Emotion Processing
PACLIC 23 / City University of Hong Kong / 3-5 December 200