Blogosphäre - Soziale Netzwerke als Trendsetter

Seit kurzem erweitert sich das Web zu einem neuen Lebensraum, in welchem sich Nutzer präsentieren, mit anderen treffen, Informationen und Know-how austauschen, gemeinsame Projekte verfolgen und kulturelle Barrieren überwinden können. Unser Beitrag gibt einen kurzen Überblick über soziale Netzwerke, wobei das Augenmerk vor allem auf Weblogs und Onlinegemeinschaften der Blogosphäre gelegt wird. Durch die in Weblogs gängige Funktion Kommentare mit Links zu eigenen Blogs zu hinterlassen, wird eine Gemeinschaftsbildung gefördert, wobei Onlinegemeinschaften, deren Themen sich beispielsweise um Gadgets, Digitalfotografie, Fashion, Gastronomie, Sport, Musik, usw. drehen, entstehen können. Anhand verschiedener Praxisbeispiele wird aufgezeigt wie in Bloggemeinschaften Trends gesetzt werden, welche später wiederum von Suchmaschinen an die breite Öffentlichkeit getragen werden. Abrundend präsentieren wir Handlungsempfehlungen für den Umgang mit sozialen Netzwerken der Blogosphäre.

What is New and Innovative in Emergency Neurosurgery? Emerging Diagnostic Technologies Provide Better Care and Influence Outcome: A Specialist Review

The development of emergency medical services and especially neurosurgical emergencies during recent decades has necessitated the development of novel tools. Although the gadgets that the neurosurgeon uses today in emergencies give him important help in diagnosis and treatment, we still need new technology, which has rapidly developed. This review presents the latest diagnostic tools, which offer precious help in everyday emergency neurosurgery practice. New ultrasound devices make the diagnosis of haematomas easier. In stroke, the introduction of noninvasive new gadgets aims to provide better treatment to the patient. Finally, the entire development of computed tomography and progress in radiology have resulted in innovative CT scans and angiographic devices that advance the diagnosis, treatment, and outcome of the patent. The pressure on physicians to be quick and effective and to avoid any misjudgement of the patient has been transferred to the technology, with the emphasis on developing new systems that will provide our patients with a better outcome and quality of life.

Privacy-Preserving Optimal Meeting Location Determination on Mobile Devices

Equipped with state-of-the-art smartphones and mobile devices, today's highly interconnected urban population is increasingly dependent on these gadgets to organize and plan their daily lives. These applications often rely on current (or preferred) locations of individual users or a group of users to provide the desired service, which jeopardizes their privacy; users do not necessarily want to reveal their current (or preferred) locations to the service provider or to other, possibly untrusted, users. In this paper, we propose privacy-preserving algorithms for determining an optimal meeting location for a group of users. We perform a thorough privacy evaluation by formally quantifying privacy-loss of the proposed approaches. In order to study the performance of our algorithms in a real deployment, we implement and test their execution efficiency on Nokia smartphones. By means of a targeted user-study, we attempt to get an insight into the privacy-awareness of users in location-based services and the usability of the proposed solutions.

Green Wireless-Energy Efficiency in Wireless Networks

Wireless networks have become more and more popular because of ease of installation, ease of access, and support of smart terminals and gadgets on the move. In the overall life cycle of providing green wireless technology, from production to operation and, finally, removal, this chapter focuses on the operation phase and summarizes insights in energy consumption of major technologies. The chapter also focuses on the edge of the network, comprising network access points (APs) and mobile user devices. It discusses particularities of most important wireless networking technologies: wireless access networks including 3G/LTE and wireless mesh networks (WMNs); wireless sensor networks (WSNs); and ad-hoc and opportunistic networks. Concerning energy efficiency, the chapter discusses challenges in access, wireless sensor, and ad-hoc and opportunistic networks.