A simple and quite flexible numerical model is presented to predict the steady state ice-layer formation inside a cooled two dimensional channel or a tube containing a turbulent flow. The effects of arbitrary entrance velocity distributions upon the shape of the ice-layers are examined. The presented numerical scheme is verified by comparing the predicted ice-layers with measurements and genera...

The performance of hot-forging dies, in which the die cavity is weld-deposited with a layer of modified H12 hot-work tool steel, has been studied, using a continuous monitoring of the die condition as well as macroscopic and microscopic examination. It was observed that the thickness of the hard upper ‘capping layer’ and that of an intermediate ‘buffer layer’ have a pronounced effect on the lif...

The introduction of antigen into animals causes antigen-specific T cells to divide and then die. Activated T cell death requires either of the death effector molecules, Bak or Bax. When T cells die, Bak and Bax change their conformations, a phenomenon that is thought to be required for Bak or Bax to drive cell death. Here we show that Bak changes conformation before activated T cells die, as de...

Die-pattern technique is presently the most prevalent in use as a general method of constructing inlays, and crown and bridge work. A wax pattern is prepared on a stone die and taken out to be invested and cast. This method and process of taking wax patterns out of the die occasionally causes deformation or damage to patterns due to handling or the properties of the wax itself, and this affects...

Nach einer Einleitung und Diskussion tiber die Eingen­schaften der diabetischen Krankheiten wurde ausflihrlich trber die Aetiologie und Pathophysiologie der Zuckeran­kheiten,insbesondere der Altersdiabetis,gesprochen.Nach der symptomalogie der Diabetis haben wir die ncueste Einteilung der Zuckerkrankheiten genannt und die Untc­rsuchungsmethoden,die heute Uhlich sind,erwahnt;dazu wurden unsere M...

Mit Hilfe des vorgestellten Ansatzes soll eine Testfallauswahl im Rahmen einer automatisierten und modellbasierten Testfallgenerierung ermöglicht werden. Dazu wird das UML-Systemmodell entsprechend erweitert und ein mögliches Verfahren zur weiteren Informationsverarbeitung vorgestellt. Diese Testfallauswahl ist ein Teilprozeß eines Verfahrens zur Testfallgenerierung, welches aus UML-Modellen pa...

This paper presents a new approach to 3D shape comparison and retrieval based on the computation of Gaussian transforms of the surface model on a set of points regularly distributed inside the model’s bounding box. A study of the properties of the Gaussian term leads us to an efficient computation of the description. This method is evaluated on the Princeton Shape Benchmark database.

The aim of this diplom thesis is to provide a robust and e cient solver for large sparse and poor conditioned linear systems arising from the FEmethod for elliptic scalar PDEs of second order. For a counter example the problem of magnetic shielding is used. Therefore the Maxwell's equations for stationary objects are reduced to a scalar PDE of second order with appropriate boundary conditions. ...

This thesis introduces a new method for the design of video quality metrics. In addition, a set of generic guidelines for the verification of video quality metrics is described. Video quality metrics are an essential tool for the design of efficient video compression and transmission systems, but up to today the methods used for the task of evaluating the quality of a video that has been proces...

A salesman in a red suit who looks suspiciously like Tom Waits presents you with a black steel box with n binary switches on the front and a light bulb on the top. The salesman tells you that the state of the light bulb is controlled by a complex boolean circuit—a collection of AND, OR, and NOT gates connected by wires, with one input wire for each switch and a single output wire for the light ...