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pulsed current plasma arc welding (pcpaw) is one of the most widely used welding processes in sheet metal manufacturing industry. in any fusion arc welding process, the weld bead geometry plays an important role in determining the mechanical properties of the weld and hence quality of the weld.  moreover, the geometry of weld bead involves several simultaneously multiple quality characteristics...

We pursue an inverse approach to utility theory and consumption & investment problems. Instead of specifying an agent’s utility function and deriving her actions, we assume we observe her actions (i.e. her consumption and investment strategies) and ask if it is possible to derive a utility function for which the observed behaviour is optimal. We work in continuous time both in a deterministic a...

About thirty years ago, I suffered from severe back pain. For some weeks I lay in a body cast, dazed by pain-killers and muscle-relaxants. When I was recovering, I decided one day that I needed exercise. Very gingerly I got on my bike and, feeling rather sorry for myself, rode slowly up Mundy Pond Road. I drew abreast of a group of boys going home from school for lunch. One of them was holding ...