This paper studied the deformation mechanisms of sheet metals stamped by rigid punches and deformable dies. Emphasis was placed on the development of elastic plastic zones in the sheet workpieces, on the functions of the die parameters and on their correlations with spring-back. It was found that the reduction of spring-back was due mainly to the interface interaction offered by the dies. The p...

In the game of Penney Ante two players take turns publicly selecting two distinct words of length n using letters from an alphabet Ω of size q. They roll a fair q sided die having sides labelled with the elements of Ω until the last n tosses agree with one player’s word, and that player is declared the winner. For n ≥ 3 the second player has a strategy which guarantees strictly better than even...

This paper reports on the measured dc characteristics of a SiC JFET device from room temperature up to 450◦C in order to evaluate the device’s capability for high-temperature operation. The authors packaged SiC JFET bare die into a dedicated high-temperature package to be able to perform experiments under extremely high ambient temperatures. The experimental results show that the device can ope...

Consider the experiment of tossing a 6-sided die. Suppose the outcome is 2. Does the event that the outcome is even happen? The answer is yes. Now assume that the toss produces an outcome 4, does the event that the outcome is even happen? The answer is yes. Actually observe that when the outcome is from the set {2, 4, 6}, the event happens. Thus an event in a probabilistic experiment is actuall...

economic considerations, such as the rising cost of water slipply and effluent treatment, shortage of water created by increased demand, and tighter legal control. Dyehouse effluents contain a wide range of impurities which may be organic or inorganic, soluble, colloidal or suspended. These impurities will limit the suitability of the effluent for immediate recycling to varying degrees dependin...

Cook County Hospital, like many hospitals in the U.S. and worldwide, is pursuing a developing strategy to combat healthcare-associated infections (HAIs). Annually, the human toll in the U.S. is approximately two million infected, of which over 100,000 die. An interdisciplinary team of researchers from Georgia Tech, the CDC, and Cook County Hospital, with backgrounds in engineering, economics an...

Consumer demand for smaller and lighter products in wiresless application with maximum functionality had drive the semiconductor industries toward the developement of 3-dimensional stacked die. One of the key technology is relies on die stacking process. A suitable bonding condition and material set are essential to achieve required reliability performance. This study is to relate the effects o...

sheet metal components design and manufacture need a great deal of experience and know-how. strip layout design is usually done with trial and error until best design for strip layout is finally achieved. knowledge for the system is formulated from plasticity theories, experimental results, and the empirical knowledge of field experts. in this paper, an algorithm which can automatically design ...

in this paper, based on the slab method of analysis, a novel and general approach isdeveloped for studying the radial forging process with curved profile dies. the presented approachis not only more general with respect to previous studies, but it is also easier to understand and useand can be efficiently used for optimization of the die profile depending on the forging geometryand conditions. ...