Ranking systems such as those in product review sites and recommender systems usually use ratings to rank favorite items based on both their quality and popularity. Since higher ranked items are more likely selected and yield more revenues for their owners, providers of unpopular and low quality items have strong incentives to strategically manipulate their ranking. This paper analyzes the adve...

Cloud computing is an amazing technology, which provides services to users on-demand. Since there are many providers in the cloud, users get confused in selecting the optimal cloud service provider. To overcome this limitation, federated cloud management architecture was proposed. There is no standard framework for ranking the cloud service providers in the existing federated cloud model. The p...

Nowadays Service activities are social and involve different types of individuals that should be considered. Thus, group profiling can be used to connect similar customers together and recommend providers based on group evaluation. Accordingly, this paper proposes a new approach that recommends providers, based on group profiling and ranking, to be used in e-service portals. This approach focus...

The practice of paid placement advertising—where advertisers pay a fee to appear alongside particular Web search results—is now one of the largest and fastest growing source of revenue for Web search engines. This article studies the allocation of placement slots. The payperclick standard for paid placement makes the problem challenging because it is not optimal to simply allocate slots to the ...

BACKGROUND A number of reforms have been implemented in Swedish health care to support integrated care for frail older people and to reduce utilization of hospital care by this group. Outcomes and process indicators have been used in pay-for-performance (P4P) schemes by both national and local governments to support developments. OBJECTIVE To analyse limitations in the use of outcome and proc...

Increase in competition level and unclear demand in the market have made organizations to utilize scientific models and techniques for optimizing their management process. Among the main processes effective on organizations performance is to select appropriate providers. The following research tries to present an optimized solution for providers, assessment and selection. The study uses data en...

The emergence of Application Service Providers (ASP) hosting Internet-based data mining services is being seen as a viable alternative for organisations that value their knowledge resources but are constrained by the high cost of data mining software. The current modus operandi for data mining ASPs does not represent a true marketplace environment characterised by open competition. We have deve...

The practice of paid placement advertising—where advertisers pay a fee to appear alongside particular Web search results—is now one of the largest and fastest growing source of revenue for Web search engines. This article studies the allocation of placement slots. The pay-per-click standard for paid placement makes the problem challenging because it is not optimal to simply allocate slots to th...

Social media are used by an increasing number of political actors. A small subset of these is interested in pursuing extremist motives such as mobilization, recruiting or radicalization activities. In order to counteract these trends, online providers and state institutions reinforce their monitoring efforts, mostly relying on manual workflows. We propose a machine learning approach to support ...

Studies find that at least 20% of web queries have local intent; and the fraction of queries with local intent that originate from mobile properties may be twice as high. The emergence of standardized support for location providers in web browsers, as well as of providers of accurate locations, enables so-called hyper-local web querying where the location of a user is accurate at a much finer g...