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Patterns in the Chaos—A Study of Performance Variation and Predictability in Public IaaS Clouds
Benchmarking the performance of public cloud providers is a common research topic. Previous work has already extensively evaluated the performance of different cloud platforms for different use cases, and under different constraints and experiment ...
MARSA: A Marketplace for Realtime Human Sensing Data
This article introduces a dynamic cloud-based marketplace of near-realtime human sensing data (MARSA) for different stakeholders to sell and buy near-realtime data. MARSA is designed for environments where information technology (IT) infrastructures are ...
Mining and Quality Assessment of Mashup Model Patterns with the Crowd: A Feasibility Study
Pattern mining, that is, the automated discovery of patterns from data, is a mathematically complex and computationally demanding problem that is generally not manageable by humans. In this article, we focus on small datasets and study whether it is ...
rSYBL: A Framework for Specifying and Controlling Cloud Services Elasticity
Cloud applications can benefit from the on-demand capacity of cloud infrastructures, which offer computing and data resources with diverse capabilities, pricing, and quality models. However, state-of-the-art tools mainly enable the user to specify “if-...
Irony Detection in Twitter: The Role of Affective Content
Irony has been proven to be pervasive in social media, posing a challenge to sentiment analysis systems. It is a creative linguistic phenomenon where affect-related aspects play a key role. In this work, we address the problem of detecting irony in ...
Model-Based Collaborative Personalized Recommendation on Signed Social Rating Networks
Recommendation on signed social rating networks is studied through an innovative approach. Bayesian probabilistic modeling is used to postulate a realistic generative process, wherein user and item interactions are explained by latent factors, whose ...
Dynamic and Efficient Private Keyword Search over Inverted Index--Based Encrypted Data
Querying over encrypted data is gaining increasing popularity in cloud-based data hosting services. Security and efficiency are recognized as two important and yet conflicting requirements for querying over encrypted data. In this article, we propose an ...