A parallel implicit adaptive mesh refinement (AMR) algorithm is described for the system of partial-differential equations governing steady two-dimensional compressible gaseous flows. The AMR algorithm uses an upwind finite-volume spatial discretization procedure in conjunction with limited linear solution reconstruction and Riemann-solver based flux functions to solve the governing equations o...

Abstract: Whenever the fabrication process consists of several steps and the dynamic modification of individual steps or step sequences of the process is allowed, multi-step feedback and feed-forward control can be utilized to improve the quality of the fabrication process. Feedback and feed-forward control have been identified as important features of the semiconductor manufacturing facility o...

The possibility for connecting mobile end-devices and mobile automation facilities leads to fast deployment of Wireless LANs in factory automation, for instance to connect hand-scanners, mobile operation-terminals, automated guided vehicles. In these applications, WLAN is currently used for transparently prolonging a wired connection at the end of a control line (e.g. for controlling a mobile r...

The possibility to connect mobile end-devices and mobile automation facilities leads to fast deployment of Wireless LANs in factory automation, for instance to connect hand-scanners, mobile operation-terminals, automated guided vehicles. In these applications, WLAN is typically used for transparently prolonging a wired connection at the end of a control line (e.g. for controlling a mobile robot...

Multi-step processes are common in healthcare, software development, and other dynamic environments. Managers who monitor processes are overwhelmed by information, and have limited time to investigate data from different viewpoints. We propose the interactive Multi-Step Process Visualization (MSProVis) for retrospective analysis, to expose delays in multi-step processes, and support the compari...

In this paper, we investigate subdivision tree representations of arbitrary triangle meshes. By subdivision, we mean the recursive topological partitioning of a triangle into subtriangles. Such a process can be represented by a subdivision tree. We identify the class of regular triangle meshes, those that can be losslessly represented by a nontrivial subdivision tree, i.e. by a subdivision tree...

In this work, we study mesh regularization in Bank-Holst parallel adaptive paradigm when adaptive enrichment in both h (geometry) and p (degree) is used. The paradigm was first introduced by Bank and Holst in [2, 3, 1] and later extended to hp-adaptivity in [5]. In detail, the paradigm can be summarized in the following steps. Step 1 Load Balancing: The problem is solved on a coarse mesh, and a...

This paper presents a method for meshing multi-material domains with additional features curves. This requirement arises for instance in situations where smooth objects (e.g. anatomical structures) are combined with technical objects (e.g. implants, surgical screws). Our approach avoids the tedious process of generating a single consistent input surface by means of an implicit representation, c...

Abstract – Wireless Mesh networks exploit multi-hop wireless communications between Access Points to replace wired infrastructure. However, in multi-hop networks, effective bandwidth decreases with increasing number of hops, mainly due to increased spatial contention. Longer hop length flows suffer from extremely low throughputs which is highly undesirable in the envisioned scenarios for mesh n...