6,472 research outputs found
Evolutionary dynamics of group cooperation with asymmetrical environmental feedback
In recent years, there has been growing interest in studying evolutionary
games with environmental feedback. Previous studies exclusively focus on
two-player games. However, extension to multi-player game is needed to study
problems such as microbial cooperation and crowdsourcing collaborations. Here,
we study coevolutionary public goods games where strategies coevolve with the
multiplication factors of group cooperation. Asymmetry can arise in such
environmental feedback, where games organized by focal cooperators may have a
different efficiency than the ones by defectors. Our analysis shows that
co-evolutionary dynamics with asymmetrical environmental feedback can yield
oscillatory convergence to persistent cooperation, if the relative changing
speed of cooperators' multiplication factor is above a certain threshold. Our
work provides useful insights into sustaining group cooperation in a changing
world
Collective awareness platforms and digital social innovation mediating consensus seeking in problem situations
In this paper we show the results of our studies carried out in the framework of the European Project SciCafe2.0 in the area of Participatory Engagement models. We present a methodological approach built on participative engagements models and holistic framework for problem situation clarification and solution impacts assessment. Several online platforms for social engagement have been analysed to extract the main patterns of participative engagement. We present our own experiments through the SciCafe2.0 Platform and our insights from requirements elicitation
Visual Affect Around the World: A Large-scale Multilingual Visual Sentiment Ontology
Every culture and language is unique. Our work expressly focuses on the
uniqueness of culture and language in relation to human affect, specifically
sentiment and emotion semantics, and how they manifest in social multimedia. We
develop sets of sentiment- and emotion-polarized visual concepts by adapting
semantic structures called adjective-noun pairs, originally introduced by Borth
et al. (2013), but in a multilingual context. We propose a new
language-dependent method for automatic discovery of these adjective-noun
constructs. We show how this pipeline can be applied on a social multimedia
platform for the creation of a large-scale multilingual visual sentiment
concept ontology (MVSO). Unlike the flat structure in Borth et al. (2013), our
unified ontology is organized hierarchically by multilingual clusters of
visually detectable nouns and subclusters of emotionally biased versions of
these nouns. In addition, we present an image-based prediction task to show how
generalizable language-specific models are in a multilingual context. A new,
publicly available dataset of >15.6K sentiment-biased visual concepts across 12
languages with language-specific detector banks, >7.36M images and their
metadata is also released.Comment: 11 pages, to appear at ACM MM'1
Beautiful and damned. Combined effect of content quality and social ties on user engagement
User participation in online communities is driven by the intertwinement of
the social network structure with the crowd-generated content that flows along
its links. These aspects are rarely explored jointly and at scale. By looking
at how users generate and access pictures of varying beauty on Flickr, we
investigate how the production of quality impacts the dynamics of online social
systems. We develop a deep learning computer vision model to score images
according to their aesthetic value and we validate its output through
crowdsourcing. By applying it to over 15B Flickr photos, we study for the first
time how image beauty is distributed over a large-scale social system.
Beautiful images are evenly distributed in the network, although only a small
core of people get social recognition for them. To study the impact of exposure
to quality on user engagement, we set up matching experiments aimed at
detecting causality from observational data. Exposure to beauty is
double-edged: following people who produce high-quality content increases one's
probability of uploading better photos; however, an excessive imbalance between
the quality generated by a user and the user's neighbors leads to a decline in
engagement. Our analysis has practical implications for improving link
recommender systems.Comment: 13 pages, 12 figures, final version published in IEEE Transactions on
Knowledge and Data Engineering (Volume: PP, Issue: 99
Innovation Initiatives in Large Software Companies: A Systematic Mapping Study
To keep the competitive advantage and adapt to changes in the market and
technology, companies need to innovate in an organised, purposeful and
systematic manner. However, due to their size and complexity, large companies
tend to focus on maintaining their business, which can potentially lower their
agility to innovate. This study aims to provide an overview of the current
research on innovation initiatives and to identify the challenges of
implementing the initiatives in the context of large software companies. The
investigation was performed using a systematic mapping approach of published
literature on corporate innovation and entrepreneurship. Then it was
complemented with interviews with four experts with rich industry experience.
Our study results suggest that, there is a lack of high quality empirical
studies on innovation initiative in the context of large software companies. A
total of 7 studies are conducted in such context, which reported 5 types of
initiatives: intrapreneurship, bootlegging, internal venture, spin-off and
crowdsourcing. Our study offers three contributions. First, this paper
represents the map of existing literature on innovation initiatives inside
large companies. The second contribution is to provide an innovation initiative
tree. The third contribution is to identify key challenges faced by each
initiative in large software companies. At the strategic and tactical levels,
there is no difference between large software companies and other companies. At
the operational level, large software companies are highly influenced by the
advancement of Internet technology. Large software companies use open
innovation paradigm as part of their innovation initiatives. We envision a
future work is to further empirically evaluate the innovation initiative tree
in large software companies, which involves more practitioners from different
companies
Crowdsourcing a Word-Emotion Association Lexicon
Even though considerable attention has been given to the polarity of words
(positive and negative) and the creation of large polarity lexicons, research
in emotion analysis has had to rely on limited and small emotion lexicons. In
this paper we show how the combined strength and wisdom of the crowds can be
used to generate a large, high-quality, word-emotion and word-polarity
association lexicon quickly and inexpensively. We enumerate the challenges in
emotion annotation in a crowdsourcing scenario and propose solutions to address
them. Most notably, in addition to questions about emotions associated with
terms, we show how the inclusion of a word choice question can discourage
malicious data entry, help identify instances where the annotator may not be
familiar with the target term (allowing us to reject such annotations), and
help obtain annotations at sense level (rather than at word level). We
conducted experiments on how to formulate the emotion-annotation questions, and
show that asking if a term is associated with an emotion leads to markedly
higher inter-annotator agreement than that obtained by asking if a term evokes
an emotion
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