Extended Abstract The concept of reenement is a well-known technique within software engineering in general and for stepwise development of Petri nets in particular. In fact, several diierent concepts for the reenement of nets have been proposed in literature, above all the reenement of places, transitions or even subnets by some other subnet. Based on the idea of formal grammars, we propose ru...

A signed graph is a graph where the edges are assigned either positive ornegative signs. Net degree of a signed graph is the dierence between the number ofpositive and negative edges incident with a vertex. It is said to be net-regular if all itsvertices have the same net-degree. Laplacian energy of a signed graph is defined asε(L(Σ)) =|γ_1-(2m)/n|+...+|γ_n-(2m)/n| where γ_1,...,γ_n are the ei...

The results of the research group forMA�NET (funded by the German Research Council 2006-2012) on reconfigurable Petri nets are presented in this talk. We introduce a family of modeling techniques consisting of Petri nets together with a set of rules. For reconfigurable Petri nets not only the follower marking can be computed but also the structure can be changed by rule application to obtain a ...

As IP technologies providing both tremendous capacity and the ability to establish dynamic secure associations between endpoints emerge, Virtual Private Networks (VPNs) are going through dramatic growth. The number of endpoints per VPN is growing and the communication pattern between endpoints is becoming increasingly hard to forecast. Consequently , users are demanding dependable, dynamic con-...

Measurements are presented on the behaviour of a hand-held tennis racquet when it impacts with a tennis ball. It is shown that an impulse is transmitted through the racquet to the hand in about 1.5 ms, with the result that the hand and the forearm both have a strong in ̄uence on the behaviour of the racquet even while the ball is still in contact with the strings. Regardless of the impact point,...

Ewing's sarcoma (ES) is a highly malignant neoplasm of childhood and adolescence seen commonly in both axial and appendicular skeleton but uncommonly in acral region. Ewing’s tumor in the hand is extraordinarily rare. Radiological features are variable and can mimic other common lesions. We present a case of 13 year old female, with complaints of pain and swelling in right hand, which on X-ray ...

The main challenge of continuous sign language translation (CSLT) lies in the extraction both discriminative spatial features and temporal features. In this paper, a spatial-temporal feature network (STFE-Net) is proposed for CSLT, which optimally fuses features, extracted by (SFE-Net) (TFE-Net), respectively. SFE-Net performs pose estimation presenters sign-language videos. Based on COCO-Whole...