The problem of composing services to deliver integrated business solutions has been widely studied in the last years. Besides addressing functional requirements, services compositions should also provide agreed service levels. Our goal is to support model-based analysis of service compositions, with a focus on the assessment of non-functional quality attributes, namely performance and reliabili...

A semantic quality attribute of a modelling language is a desired semantic characteristic that is common to all models specified in that language. A modeller can enjoy the luxury of not having to model the invariants of the behaviour that are implicitly enforced by the semantic quality attributes. In this paper, we introduce three semantic quality attributes for the family of big-step modelling...

Spatial sound reproduction gives rise to new challenges for those trying to evaluate sensory features contributing to perceived quality. Recent technical developments have enabled the delivery of sophisticated multichannel audio signals to consumers, over links that range very widely in quality, requiring decisions to be made about the tradeoffs between different aspects of audio quality. Spati...

The Internet has increasingly replaced or supplemented other communication and transaction channels. Due to the simplicity of getting information and conducting transactions, a steadily increasing number of consumers are using the World Wide Web for informing themselves and shopping online. From a company’s point of view, these changes in consumers’ behavior have generated a multitude of opport...

Unsupervised learning methods such as clustering techniques are a natural choice for analyzing software quality by mining its related metrics. It is well known that clustering plays an important role in data mining tasks like in data analysis and information retrieval. In this paper, we have proposed an approach to cluster the pool of java classes based on the proximity between them. To know th...

Cloud computing is one of the most emerging industries and offers scalable computing resources and on-demand packages. A large number of cloud services are being offered by many service providers, a vendor supplies many services or same service is provided by many vendors, which creates the selection issue of appropriate cloud service from a big pool. Quality of service plays important role for...

Facial images are often used in applications that need to recognize or identify persons. Many existing facial recognition tools have limitations with respect to facial image quality attributes such as resolution, face position, and artifacts present in the image. In this paper we describe a new low-cost framework for preprocessing low-quality facial images in order to render them suitable for a...

Intelligent reservoir characterization using seismic attributes and hydraulic flow units has a vital role in the description of oil and gas traps. The predicted model allows an accurate understanding of the reservoir quality, especially at the un-cored well location. This study was conducted in two major steps. In the first step, the survey compared different intelligent techniques to discover ...