High-energy surge tests have been pe$ormed on metal-oxide varistors of a type in common use, according to a proposed ZEC standard derived from German Standard W E 01 60. l%e surge generator used for the test was a prototype commercial device developed especially to deliver the 1000300 ps waveform speczjied by W E Standard 0160. Depending on the position of the varistor within its manufacturing ...

In this chapter some of the standard procedures for delamination testing of unidirectional polymer composites will be examined. The main objective is to explore the possibilities of applying the standard testing methods to interlayer toughened composites and to establish parameters which may influence fracture toughness measurements. Existing standards for mode I and mode II delamination testin...

OBJECTIVE Sternal dehiscence is commonly due to wire cutting through bone. With a biological model, we measured the rate of cutting through bone, of standard steel wire closure, peristernal steel wire, figure-of-eight closure, polyester and sternal bands sternotomy closure techniques. METHODS Polyester, figure-of-eight, peristernal and sternal band closures were tested against standard closur...

In this study, artificial neural network was used to predict the surface tension of 20 hydrocarbon mixtures. Experimental data was divided into two parts (70% for training and 30% for testing). Optimal configuration of the network was obtained with minimization of prediction error on testing data. The accuracy of our proposed model was compared with four well-known empirical equations. The arti...

The current state of affair in e-learning world-wide shows a reluctance to didactic design. Learners frequently complain and scientists discuss about insufficient adaptivity of e-learning offers to the learners’ needs. Didactics is badly underestimated. High quality didactic design is seen as a crucial aspect of dissemination. E-learning content and services need to reach their audience properl...

This memo describes the procedures and criteria for reviewing reliable multicast protocols within the Transport Area (TSV) of the IETF. Within today’s Internet, important applications exist for a reliable multicast service. Some examples that are driving reliable multicast technology are collaborative workspaces (such as whiteboard), data and software distribution, and (more speculatively) web ...