When creating an editor for a visual language, a challenging task is the layout specification. Many visual languages, e.g., Ecore diagrams or Petri nets, show similar layout characteristics, and hence reuse of layout behavior should be enabled. For that purpose, we introduce the concept of layout patterns, which encapsulates certain layout behavior. With the approach, it is possible to combine ...

We present a recursive method for generating layout for VLSI chips which combines the flexibility of gate array and standard cell layout with the control and density of custom layout. The method allows seamless integration of hand-drawn and synthesized layout, so that hand layout need only be used where the increase in density is justified. Layout is generated automatically with predictable res...

This paper proposes a modified spring modeling algorithm for drawing undirected graphs, that is an extension of the forceddirected placement method of spring modeling algorithm by Eades. We call it dynamic parameter spring modeling algorithm. This algorithm is not only a general algorithm for graph layout, but also it is more suitable to get a semi-stable graph layout. A semi-stable layout is a...

Computerised Tomography (CT) refers to the process that generates a cross-sectional or volumetric image of an object from a series of projections collected by scanning the object from many different directions [1]. Due to the essential complex feature of filtered backprojection (FBP) algorithm, image reconstruction is a computationally intensive process. Thanks to reconfigurable technology, alg...

Session Initiation Protocol is currently receiving much attention and seems to be the most promising candidate as signaling protocol for the current and future IP telephony services, also becoming a real competitor to plain old telephone service. For the realization of such a scenario, there is the obvious need to provide a certain level of quality and security, comparable to that provided by t...

Mechanical alloying of Ti-Si and NiTi was performed by high-energy ball milling at ambient temperature. The structural and compositional evolutions during mechanical alloying were investigated. Results showed that the crystallite size of mechanically alloyed Ti-Si and Ni-Ti powders decreased with increasing milling time and the steady-state crystallite size was approximately 10 nm. The mechanic...

The authors have reviewed flow-accelerated corrosion (FAC) programs used at various types of conventional fossil plants. The results and findings of the assessments are presented and discussed. A number of emergent areas of FAC damage have been added to the previous suite of recognized susceptible locations with a concentration on damage due to two-phase FAC. Several deficiencies related to fee...

Congestion control for IP multicast on the Internet has been one of the main issues that challenge a rapid deployment of IP multicast. In this article, we survey and discuss the most important congestion control schemes for multicast video applications on the Internet. We start with a discussion of the different elements of a multicast congestion control architecture. A congestion control schem...

ulticasting is growing in importance as new applications are devised. Throughout this article, multicasting is understood as the efficient multipoint-to-multipoint transmission of information (in terms of network resource consumption) between the members of a group. In particular, the focus is on the problems of deploying the multicast service in an ATM environment. ATM has been widely deployed...