Papers from ringing group, observatory and local bird reports

Information System for Bird Ringing: ”Tipu”

Local institutions, livelihoods and vulnerability: lessons from Afghanistan - HPG Working Papers - Research reports and studies

Acknowledgements This paper draws on a two-and-a-half-year study with the Afghanistan Research and Evaluation Unit in Kabul. It could not have been completed without the efforts of the study research team who conducted the field work, often under difficult circumstances. The engagement and interest of our study partners Mercy Corps and the Aga Khan Foundation is greatly appreciated. The support...

Computer Science and Information Systems Reports Working Papers Wp-40 Computer Science and Information Systems Reports Working Papers Wp-40

Kollanus, Sami and Koskinen Jussi Survey of software inspection research: 1991-2005 Jyväskylä: University of Jyväskylä, 2007, xx p. (Computer Science and Information Systems Reports: Working Papers ISBN 978-951-39-2776-9) ISSN 0359-8489 Software inspections were introduced already about 30 years ago. There is a need to review the made progress and to consider the potential of the field. This pa...

Gibbs-Ringing Artifact Removal Based on Local Subvoxel-shifts

PURPOSE To develop a fast and stable method for correcting the gibbs-ringing artifact. METHODS Gibbs-ringing is a well-known artifact which manifests itself as spurious oscillations in the vicinity of sharp image gradients at tissue boundaries. The origin can be seen in the truncation of k-space during MRI data-acquisition. Correction techniques like Gegenbauer reconstruction or extrapolation...

Local equilibrium in bird flocks

The correlated motion of flocks is an instance of global order emerging from local interactions. An essential difference with analogous ferromagnetic systems is that flocks are active: animals move relative to each other, dynamically rearranging their interaction network. The effect of this off-equilibrium element is well studied theoretically, but its impact on actual biological groups deserve...