Amateurs striving for news production. Can they competewith professional journalism?

tWith the rise of Web 2.0 the discussion about professional journalism changing radically or even becom-ing obsolete in the future has intensified. Up to now, empirical findings mainly stem from research on(micro-)blogging and show its complementary rather than equivalent function compared with profes-sional journalism. Amazingly, the performance of collaborative amateur news websites with an explicitlyjournalistic approach has rarely been studied so far. Therefore, this paper compares the coverage of Ger-man Wikinews with a professional German mass media website and finds significant differences in variousdimensions. It thus contributes to the growing empirical evidence and literature on citizen journalism

Modularisierung der Berufspraktischen Ausbildung an der Pädagogischen Hochschule Rorschach. Die Balance zwischen inhaltlicher Schwerpunktsetzung und Zerstückelung

Mit der Modularisierung der Berufspraktischen Studien bieten sich gute Möglichkeiten, die Fachdidaktik und die Fachwissenschaft direkter als bisher an den Praktika zu beteiligen. Jedes Praktikum wird von einem oder zwei Studienbereichen verantwortet. Damit sind Lehre und Berufspraxis nahe zueinander gerückt. Wichtig sind der logische Aufbau über die verschiedenen Praktikumsmodule hinweg und die Vermeidung von Lücken oder Doppelspurigkeiten. Eine besondere Herausforderung in diesem Modell ist die Sicherstellung des Informationsflusses zwischen allen Beteiligten

Creative Commons – Innovative Lizenzierung als Treiber neuer Wertschöpfungsmodelle und "Enabler" der GoldwynReports

Die GoldwynReports haben sich als Mittel der Kundenbindung und -information etabliert und beinhalten Fachartikel renommierter und qualifizierter Autoren aus Wirtschaft, Wissenschaft und Gesellschaft zu aktuellen Themen. Die Reports wollen neben der Vernetzung von Kunden und Partnern zugleich eine innovative Form der Publikation und des Wissenstransfers einführen. Zu diesem Zweck haben die Goldwyn AG und das Center for Education and New Learning > der Zürcher Hochschule für angewandte Wissenschaften im Sinne einer public-private-Partnership technische Formen miteinander diskutiert, wie Autoren kollaborativ publizieren können und welche Form des Umgangs mit den Inhalten auf dieser Plattform den angestrebten Nutzen am besten ermöglicht. Der Einsatz von Open Source Software war eine praktische gemeinsame Basis der Partner. Eine andere ideelle Gemeinsamkeit war die Vision, Wissen schnell und ohne den enormen Aufwand rechtlicher Abklärung weiter nutzbar zu machen und für die Wertschöpfung der Beteiligten zur Verfügung zu stellen. Aus Sicht und Erfahrung des Hochschulpartners drängten sich Creative Commons-Lizenzen (CC-Lizenzen) als ideale Umsetzungsform auf. An Beispielen aus Hochschule und Wirtschaft zeigen wir, welche Bedeutung neue urheberrechtliche Lizenzformen für die Wertschöpfung nicht nur im digitalen Bereich haben. Im Internetrecht erfahrene Juristen legen anschaulich dar, was die neue Lizenzform beinhaltet und wie Sie sie praktisch nutzen können

Low power, compact charge coupled device signal processing system

A variety of charged coupled devices (CCDs) for performing programmable correlation for preprocessing environmental sensor data preparatory to its transmission to the ground were developed. A total of two separate ICs were developed and a third was evaluated. The first IC was a CCD chirp z transform IC capable of performing a 32 point DFT at frequencies to 1 MHz. All on chip circuitry operated as designed with the exception of the limited dynamic range caused by a fixed pattern noise due to interactions between the digital and analog circuits. The second IC developed was a 64 stage CCD analog/analog correlator for performing time domain correlation. Multiplier errors were found to be less than 1 percent at designed signal levels and less than 0.3 percent at the measured smaller levels. A prototype IC for performing time domain correlation was also evaluated

Programming Protocol-Independent Packet Processors

P4 is a high-level language for programming protocol-independent packet processors. P4 works in conjunction with SDN control protocols like OpenFlow. In its current form, OpenFlow explicitly specifies protocol headers on which it operates. This set has grown from 12 to 41 fields in a few years, increasing the complexity of the specification while still not providing the flexibility to add new headers. In this paper we propose P4 as a strawman proposal for how OpenFlow should evolve in the future. We have three goals: (1) Reconfigurability in the field: Programmers should be able to change the way switches process packets once they are deployed. (2) Protocol independence: Switches should not be tied to any specific network protocols. (3) Target independence: Programmers should be able to describe packet-processing functionality independently of the specifics of the underlying hardware. As an example, we describe how to use P4 to configure a switch to add a new hierarchical label

Fluorescence spectroscopy for identification of atherosclerotic tissue

Objective: Vessel perforation and limited steerability of the laser light are the major limitations of laser angioplasty. To improve steerability fluoresence spectroscopy has been proposed for identification of atherosclerotic plaques. The aim was to investigate this. Methods: Fluorescence spectroscopy with three different excitation wavelengths (325 nm, 380 nm, 450 nm) was tested in an emission range of 400 nm to 600 nm. Intensity ratios at 480/420 nm were determined in different types of blood vessels. Necropsy material from 40 patients (punch biopsies of 4 mm diameter from the coronary and carotid artery as well as from the ascending and descending aorta) was studied spectroscopically. Histological alterations of the vessel wall were assessed by a semiquantitative score (0 to 10 points): (a) normal tissue, 0 to 2 points (mean=0.25; n=38); (b) mild atherosclerotic lesions, 3 to 5 points (mean=3.35; n=39); (c) severe atherosclerotic lesions, ≥ 6 points (mean=6.75; n=43). Results: Best spectroscopic results were obtained with an excitation wavelength of 325 nm. In samples with severe atherosclerotic lesions the fluoresence spectra showed a significant reduction of the emitted wavelength intensities when compared to normal tissue. There was a clear separation of the fluorescence spectra between normal and mild as well as between normal and severe atherosclerotic lesions; normal tissue showed an increased intensity in the range from 420 nm to 540 nm, whereas atherosclerotic lesions had no or only a small peak at 480 nm. There was a significant correlation between the semiquantitative score (n=120) and the fluorescence ratio at 480/420 nm (excitation wavelength 325 nm) with a correlation coefficient of 0.87. The spectroscopic results showed no differences between the samples taken from different types of vessels. Conclusions: Fluorescence spectroscopy allows a reliable identification of normal and atherosclerotic lesions. The close correlation between the emitted light intensity ratio at 480/420 nm and the histological alterations of the vessel wall suggests a relationship between vessel wall fluorescence and the atherosclerotic alterations of the wal

Characterization, Diagenesis, and Geocellular Modeling of Winnipegosis Formation Pinnacle Reefs in the Williston Basin, North Dakota

The Middle Devonian Winnipegosis Formation of the North Dakota Williston Basin contains pinnacle reef structures which have been targeted in the past for hydrocarbon production. These reefs have not been proven to hold economically important primary recoverable reserves, and are now being analyzed for potential CO₂ EOR and storage applications. During this study multiple sizes of Winnipegosis Formation pinnacle reef geocellular models were constructed utilizing data from North Dakota Winnipegosis pinnacle reefs wells, cores, and thin sections. These models were then simulated for CO₂ injectivity. Initial results show that Winnipegosis pinnacle reefs smaller than 1.5 miles in diameter are likely not feasible for CO₂ EOR and storage applications. Results for pinnacle reef models 1.5 miles in diameter and greater may hold CO₂ EOR recoverable reserves from 100,000-1,000,000 STB and may have the potential to store upwards of one million tons of CO₂