Throughout their history humans “tamed” not only the Danube River basin land, but also river and its associated wetlands, drastically influencing characteristic habitats, associations, communities, species. One of these flagship endemic fish species in this respect is European mudminnow (Umbra krameri Walbaum, 1792), influenced by Basin geography, history, politics, ecology. A study about commu...

Extending umbral methods introduced by Di Nardo and Senato (2006b), in this paper we provide an unifying syntax for single and multivariate k-statistics, polykays and multivariate polykays. From a combinatorial point of view, we revisit the theory as exposed by Stuart and Ord (1987) taking into account the Doubilet approach to symmetric functions. The Moebius function, occurring in the relation...

This paper examines the task of understanding dialogues in terms of the mental states of the participating agents. We present a motivating example that clarifies the challenges this problem involves and then outline a theory of dialogue interpretation based on abductive inference of these unobserved beliefs and goals, incremental construction of explanations, and reliance on domain-independent ...

In this paper a comparative analysis of different techniques in order to transform a gray-scale edge image to a thin binary edge image is performed. Several thresholding methods and thinning methods are compared. The comparison is made according to some performance measures, such as Pratt’s figure of merit, Baddeley’s measure and the ρ-coefficient. This study is an essential intermediate step t...

Shadows serve as e ective cues for a user to recognize spatial relations among objects in 3D space. However simple shadows typically used in 3D interfaces are often insu cient for the purpose, and rendering of shadows with real penumbra are not only too costly for interactive interfaces, but also do not enhance their capabilities as spatial cues. Our proposal, layered penumbra is a new interact...

We present conspicuous activities of plasma ejections along a light bridge of a stable and mature sunspot in NOAA 8971 on 2000 May 02. We found the ejections both in the Hα (10 K) images obtained with the Domeless Solar Telescope (DST) at Hida Observatory, and in the 171 Å (Fe ix/x, ∼106 K) images obtained with the Transition Region and Coronal Explorer (TRACE). Main characteristics of the ejec...