De leerlingen kijken eerst naar het Jaaroverzicht 2012, te vinden via deredactie.be. Hierna kunnen ze in …

1. {Suresh 201} Story: Three Donkeys Master Your Vocabulary. Take a look at: Vocabulary Quiz -... English; Picture->Hindi; Recording->Hindi; and more!Vocabulary List - Easy to study list with pictures and recordings for some words{Suresh 431}  तीन... Related posts:
   1. {Suresh 201} Story: Three Donkeys Master Your Vocabulary. Take a look at: Vocabulary Quiz -... The content acknowledged below is Proprietary (see terms and conditions) and is used under licence.

      Grateful acknowledgement is made to the following sources for permission to reproduce material in this unit:

      Table

      Table 1: Eurobarometer 49, September 1998, © European Communities.

      Unit Image

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      All other materials included in this unit are derived from co]]> The content acknowledged below is Proprietary (see terms and conditions) and is used under licence.

      Grateful acknowledgement is made to the following sources for permission to reproduce material in this unit:

      Table

      Table 1: Eurobarometer 49, September 1998, © European Communities.

      Unit Image

      www.flickr.com TPCOM

      All other materials included in this unit are derived from co]]> In this section we will take a closer look at the life of George IV and what brought him to Brighton.

      The Prince of Wales (see Figure 2), known familiarly to his friends as ‘Prinny’, was born in 1762 and destined to become Prince Regent in 1811 following the onset of the madness of his father, George III. He finally became George ]]> In this section we will take a closer look at the life of George IV and what brought him to Brighton.

      The Prince of Wales (see Figure 2), known familiarly to his friends as ‘Prinny’, was born in 1762 and destined to become Prince Regent in 1811 following the onset of the madness of his father, George III. He finally became George ]]> A plan was needed to determine the chain of events leading up to and during the collapse. That sequence would necessarily depend on which parts had broken first, and a fault tree would enable a plan of action in isolating the cause (or causes) of the disaster. Such a systematic approach is known as fault-tree analysis or FTA, and is part of the armoury of methods used by accident investigators. With large-scale and devastating accidents, all possibilities, however remote, need evaluation in t]]> A plan was needed to determine the chain of events leading up to and during the collapse. That sequence would necessarily depend on which parts had broken first, and a fault tree would enable a plan of action in isolating the cause (or causes) of the disaster. Such a systematic approach is known as fault-tree analysis or FTA, and is part of the armoury of methods used by accident investigators. With large-scale and devastating accidents, all possibilities, however remote, need evaluation in t]]> As the wreckage was pulled from the river it was examined and identified, and any failures of the metal components were recognised and tagged. This was a mammoth task, given that virtually the whole bridge had fallen into the water, including all the road decks, trusses, chains and hangers, eye bars and the two towers. The parts were then reassembled and all the failed or fractured components photographed and catalogued. Over 90 per cent of the bridge components were collected together and re]]> As the wreckage was pulled from the river it was examined and identified, and any failures of the metal components were recognised and tagged. This was a mammoth task, given that virtually the whole bridge had fallen into the water, including all the road decks, trusses, chains and hangers, eye bars and the two towers. The parts were then reassembled and all the failed or fractured components photographed and catalogued. Over 90 per cent of the bridge components were collected together and re]]> Brittle fractures were discovered quickly in the mass of debris hauled from the river. Such samples became the focus of increasing effort as time went by, simply because they were unexpected. So the possible failure mechanisms were immediately narrowed down when brittle fractures of critical components started to emerge from the river.

      Figure 38(a), and it shows two breaks in the limbs either side of the pin-hole. Although both appear brittle in this picture, in fact one side showed signs of ductile deformation. The way it had fractured was unique when compared with the other eye b]]> One half of the eye at the joint is shown in Figure 38(a), and it shows two breaks in the limbs either side of the pin-hole. Although both appear brittle in this picture, in fact one side showed signs of ductile deformation. The way it had fractured was unique when compared with the other eye b]]> An additional possibility was considered. It was known that there was significant movement of the bridge during passage of traffic, because users had noticed it many times when crossing. The joints would thus have been subjected to rotary motion around the pin in order to accommodate such vibrations. Could these have caused fatigue crack growth at the bearing surfaces?

      Contact between a circular and a flat plate creates so-called Hertzian stresses at the contact zone: compressive at the]]> An additional possibility was considered. It was known that there was significant movement of the bridge during passage of traffic, because users had noticed it many times when crossing. The joints would thus have been subjected to rotary motion around the pin in order to accommodate such vibrations. Could these have caused fatigue crack growth at the bearing surfaces?

      Contact between a circular and a flat plate creates so-called Hertzian stresses at the contact zone: compressive at the]]> In the immediate aftermath of the disaster, it was vital to prevent any further collapses, especially on bridges of similar design. Two other bridges were built to a design similar to that of the Silver Bridge, one upstream at St Mary's, West Virginia and the other in Brazil at Florianopolis. The bridge upstream on the Ohio river, at St Mary's, was the focus of concern, and it was closed to traffic immediately after the disaster. The eye-bar design was actually quite widespread in other bridg]]> In the immediate aftermath of the disaster, it was vital to prevent any further collapses, especially on bridges of similar design. Two other bridges were built to a design similar to that of the Silver Bridge, one upstream at St Mary's, West Virginia and the other in Brazil at Florianopolis. The bridge upstream on the Ohio river, at St Mary's, was the focus of concern, and it was closed to traffic immediately after the disaster. The eye-bar design was actually quite widespread in other bridg]]>