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BACKGROUND Patients with advanced heart failure have improved survival rates and quality of life when treated with implanted pulsatile-flow left ventricular assist devices as compared with medical therapy. New continuous-flow devices are smaller and may be more durable than the pulsatile-flow devices. METHODS In this randomized trial, we enrolled patients(More)
Acute right ventricular (RV) failure is a frequent and serious clinical challenge in the intensive care unit. It is usually seen as a consequence of left ventricular failure, pulmonary embolism, pulmonary hypertension, sepsis, acute lung injury or after cardiothoracic surgery. The presence of acute RV failure not only carries substantial morbidity and(More)
In this paper, a concept for usage of social network information as context information is proposed. Social network information (or information from social network sites) is considered as a specific type of a user's social context. We start with the potentially most widely accepted definition of context and then examine selected categorizations of context(More)
This paper analyzes influential factors of recommendation behaviour in social network sites (SNSs). Extant research on both SNSs and electronic word of mouth (eWOM) has given insufficient attention to SNSs as a potential eWOM channel. Considering the specificities of SNSs, this paper distinguishes implicit and explicit recommendation behaviour. Drawing upon(More)
This paper analyzes how new mobile platforms change existing value networks in the mobile service industry and describes how mobile network operators (MNOs) can react to such changes to remain competitive. A state-of-the-art analysis takes stock of mobile platforms provided by, e.g., device manufacturers and Internet companies. The business model of and(More)
This paper provides the results of a state-of-the-art analysis of emerging context providers, conceptualizes a future ecosystem for context information, and describes the role of telecom operators in such ecosystems. The state-of-the-art analysis of emerging context providers focuses on three types of context providers: location information providers,(More)
Context-aware services, such as location-based services, augmented reality applications, smart enterprise or assisted living applications, constitute a cornerstone of the Future Internet. One important part of such applications is context information that describes the situation in which users consume the service. While earlier context referred mainly to(More)
In order to foster the commercialisation of grid technology, several theoretical models and frameworks that guide potential sellers of grid solutions have been developed. This paper presents the results of a cross-case analysis of 25 business experiments aiming at the commercialization of grid technology. Barriers occurring when actually commercializing(More)