The guarding capacity of seven mouth protectors (Erkoflex 3.0 and 4.0, Erkoloc 3.0, 4.5 and 5.5, TranSheet/Perform and TranSheet/LiteLine) was tested mechanically on 20 plaster models, two or three tests on each mouth protector. Two tests on a plaster model without the protector served as control. An appliance was constructed to simulate the impact of an ice-hockey puck on the teeth, the plaster model was fixed onto the device and the minimum force needed to break the plaster teeth under the protector was recorded. The average total thickness and that of the soft and hard layers of the labial plates of each mouth protector were recorded along with the average thickness of the cervical and incisal hard and soft layers. The results showed that the best protection was achieved with the TranSheet/LiteLine model, followed by TranSheet/Perform and Erkoloc 5.5 and 4.5 mouthgards. All these had a resilient layer against the teeth, and it was shown in stepwise regression analysis that the only property having a statistically significant effect on the guarding capacity was the thickness of this cervical soft layer.
Summary. This article describes the fatigue testing of QT steel in ultrasonic frequencies.Different possibilities, challenges and prejudices are reviewed.
Summary. This article outlines full-scale fatigue testing of crankshafts, in particular with the resonance fatigue testing method. The focus of the paper is the practical implementation of the method.
WIRED 2 is a framework, written in Java, to build High Energy Physics event displays that can be used across the network. To guarantee portability across all platforms, WIRED is implemented in the Java language and uses the Swing user interface component set. It can be used as a stand-alone application or as an applet inside a WWW browser.The graphical user interface allows for multiple views and for multiple controls acting on those views. A detector tree control is available to toggle the visibility of parts of the events and detector geometry. XML (Extensible Markup Language), RMI (Remote Method Invocation) and CORBA loaders can be used to load event data as well as geometry data, and to connect to FORTRAN, C, C++ and Java reconstruction programs. Non-linear and non-Cartesian projections (e.g. fish-eye, rho-phi, rho-Z, phi-Z) provide special views to get a better understanding of events.WIRED has grown to be a framework in use and under development in several HEP experiments (ATLAS, CHORUS, DELPHI, LHCb, BaBar, D0 and ZEUS). WIRED event displays have also proven to be useful to explain High Energy Physics to the general public. Both CERN, in its travelling exhibition and MicroCosm, and RAL, during its open days, have displays set up.
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