in a closed die forging process, it is impossible to form complex shapes in one stage, and thus it becomes necessary to use preform dies. in the present study, backward deformation method and fe simulation via abaqus software has been used in order to design preform die of the h-shaped parts. in the backward deformation method, the final shape of the part is considered as a starting point and u...

abstract porous materials are commonly found in nature and as industrial materials such as wood, carbon, foams, ceramics and bricks. in order to use them effectively, their mechanical properties must be understood in relation to their micro-structures. foam made from non-flammable metal will remain non-flammable and the foam is generally recyclable back to its base material. this research work ...

Card Sorting stellt eine wichtige und häufig eingesetzte Usability Methode dar, die häufig für die Suche nach der grundlegenden Informationsarchitektur genutzt wird. Im Rahmen der Optimierung von Usability Tests und Remote Testing ergibt sich die Herausforderung, anstelle von realen Karten Systeme für die Durchführung von Card Sorting Testaufgaben zu entwickeln. Diese Studie zeigt anhand eines ...

Die-design for the die-casting process is a time consuming and complex activity that requires domain knowledge and vast experience of the die-designer besides information about manufacturing resources, part geometry, delivery time and cost preferences, etc. Complexity of the die-design activity further increases in case of a multi-cavity die. Currently available die-design systems lack in the l...

Biographische und monographische Darstellungen zu Konrad Zuse konzentrierten sich in der Vergangenheit sehr stark auf den Nachweis der Priorität der Zuse-Maschinen vor den amerikanischen und englischen Computer-Entwicklungen. Der einführende Beitrag gibt einen Überblick über die Problemstellungen, Ergebnisse und offenen Fragen der bisherigen Forschung über den wichtigsten deutschen Computerpion...

Die Informationstechnologie hat heute einen Reifegrad erlangt, der stark umkämpfte Massenmärkte von interaktiven Produkten hervorgebracht hat. In diesen sind – wie auch in den herkömmlichen Konsumgütermärkten – nicht nur die pragmatische Produktqualität, sondern auch das Benutzungserlebnis und die Gesamtwirkung auf den Käufer entscheidend für den Markterfolg. Eine erfolgreiche Gestaltung dieser...

We introduce a square lattice into the Penna bit-string model for biological ageing and study the evolution of the spatial distribution of the population considering different strategies of childcare. Two of the strategies are related to the movements of a whole family on the lattice: in one case the mother cannot move if she has any child younger than a given age, and in the other case if she ...

1 Basic Probability Probability theory begins with three basic components. The set of all possible outcomes, denoted Ω. The collection of all sets of outcomes (events), denoted A. And a probability measure P. Specification of the triple (Ω,A,P) defines the probability space which models a real-world measurement or experimental process. Example 1 Ω = {all outcomes of the roll of a die} = {1, 2, ...

I argue that, according to ordinary morality, there is moral inertia, that is, moral pressure to fail to intervene in certain circumstances. Moral inertia is manifested in scenarios with a particular causal structure: deflection scenarios, where a threatening or benefiting process is diverted from a group of people to another. I explain why the deflection structure is essential for moral inerti...

Statistics can broadly be defined as the science of decision-making in the face of (random) uncertainty. Gambling has the same definition, except in the narrower domain of a gambler making decisions that affect his fortune in games of chance. It is hardly surprising, then, that the two subjects are closely related. Indeed, if the definitions of “game”, “decision”, and “fortune” in the context o...