Trees are important datatypes that are often used in representing structured data such as XML. Though trees are widely used in sequential programming, it is hard to write efficient parallel programs manipulating trees of arbitrary shapes, because of their irregular and ill-balanced structures. In this paper, we propose a solution for them based on the skeletal approach, in particular for genera...

We introduce additively-weighted straight skeletons as a new generalization of straight skeletons. An additively-weighted straight skeleton is the result of a wavefront-propagation process where, unlike in previous variants of straight skeletons, wavefront edges do not necessarily start to move at the begin of the propagation process but at later points in time. We analyze the properties of add...

Skeletons are important shape descriptors in object representation and recognition. Typically, skeletons of volumetric models are computed using iterative thinning. However, traditional thinning methods often generate skeletons with complex structures that are unsuitable for shape description, and appropriate pruning methods are lacking. In this paper, we present a new method for computing skel...

BACKGROUND Spasmodic torticollis refers to involuntary dystonic movements of the head that may be associated with certain body and neck positions. The pathophysiology of dystonia is not fully known. CASE REPORT We report a case of torticollis that was unusual in the sense that it occurred only when the patient was lying on one side. DISCUSSION The cause of the cervical dystonia in this pati...

Extensive rescue excavations preceded the construction of a shopping mall in the satellite settlement of Ménfőcsanak, southwest of the city of Győr in northwestern Hungary. Work directed by Andrea Vaday of the Archaeological Institute of the Hungarian Academy of Sciences brought to light graves from a Migration Period cemetery. Many of these burials were disturbed either by contemporaneous or s...