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We have measured the adiabatic elastic constants of two Cu-Al-Ni martensitic alloys using ultrasonic methods and we have compared the results to recent neutron-scattering experiments. It is shown that the elastic behavior of Cu-Al-Ni alloys follows the same trends exhibited by other Cu-based alloys; in particular, the TA2 long-wavelength acoustic modes are(More)
The republic of Ecuador, which has a population of 10 million, is one of the smallest of the Andean countries in South America. Although it covers only an area of 110,000 square miles, it yields an extraordinary diversity of infectious diseases. Public health problems reflect socioeconomic realities and uniquely diverse climates, cultures, and geography.(More)
This paper introduces a Shuffled Frog-Leaping Algorithm based method for the optimization of machining parameters for milling operations. An objective function based on maximum profit in milling operation has been used. The algorithm is compared with others techniques and outperforms the results reached by standard shuffled frogleaping algorithm,(More)
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