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Introduction: Worldwide, the number of violence and trauma victims is increasing. Particularly, acute or chronic sequelae of hand trauma are very frequent, impacting negatively the victim's social and economic life in a long-term. Doctors Without Borders aims to save lives, reduce suffering[for full text, please go to the a.m. URL], 59. Kongress der Deutschen Gesellschaft für Handchirurgie

It is a well-established result that steganographic capacity of perfectly secure stegosystems grows linearly with the number of cover elements-secure steganography has a positive rate. In practice, however, neither the Warden nor the Steganographer has perfect knowledge of the cover source and thus it is unlikely that perfectly secure stegosystems for complex covers, such as digital media, will ever be constructed. This justifies study of secure capacity of imperfect stegosystems. Recent theoretical results from batch steganography, supported by experiments with blind steganalyzers, point to an emerging paradigm: whether steganography is performed in a large batch of cover objects or a single large object, there is a wide range of practical situations in which secure capacity rate is vanishing. In particular, the absolute size of secure payload appears to only grow with the square root of the cover size. In this paper, we study the square root law of steganographic capacity and give a formal proof of this law for imperfect stegosystems, assuming that the cover source is a stationary Markov chain and the embedding changes are mutually independent. © 2009 Copyright SPIE - The International Society for Optical Engineering.

We use a method recently introduced by us to study accusation probabilities for non-binary Tardos fingerprinting codes. We generalize the pre-computation steps in this approach to include a broad class of collusion attack strategies. We analytically derive properties of a special attack that asymptotically maximizes false accusation probabilities. We present numerical results on sufficient code lengths for this attack, and explain the abrupt transitions that occur in these results.

Fragestellung: Konzepte zur Unterstützung der Lehre mit interaktiven online Angeboten, die häufig auch off-campus genutzt werden können, gibt es an sehr vielen Universitäten. Eine Integration der Insellösungen zu einem inhaltlich schlüssigen Gesamtkonzept findet man da[for full text, please go to the a.m. URL], Jahrestagung der Gesellschaft für Medizinische Ausbildung (GMA)

Fragestellung: Unter den Studierenden der Humanmedizin an der HHU Düsseldorf sind ca. 15% internationale Studierende, wobei nur Nicht-Europäer erfasst sind. Bei dieser Größe hat die Gruppe einen nennenswerten Impact auf das Lehre-Ranking. Universitäre Beratungsstellen w[for full text, please go to the a.m. URL], Jahrestagung der Gesellschaft für Medizinische Ausbildung (GMA)