Growth of phase-pure, crack-free single crystals and large-grained polycrystals of molybdenum disilicide

High purity molybdenum disilicide crystals are prepared by zone melting sintered compacts. This method yields single crystals or polycrystals free from macrocracks which allow better measurement and evaluation of mechanical properties

Generalized Hantzsche-Wendt Flat Manifolds

We study the family of closed Riemannian n-manifolds with holonomy group isomorphic to $Z_2^{n-1}$, which we call generalized Hantzsche-Wendt manifolds. We prove results on their structures, compute some invariants, and find relations between them, illustrated in graph connecting the family.Comment: 16 pages, 1 figure. Revista Matematica Iberoamericana. Vol. 21, no. 3 (2005). (to appear

Numerical Simulations of the Dynamical Behavior of the SK Model

We study the dynamical behavior of the Sherrington Kirkpatrick model. Thanks to the APE supercomputer we are able to analyze large lattice volumes, and to investigate the low $T$ region. We present a determination of the remnant magnetization and of its time decay exponent, of the energy time decay exponent, and we discuss aging phenomena in the model.Comment: 11 pages including 8 figures. Revised version with major restructurin

Experimental determination of pressure drop and flow characteristics of dilute gas-solid suspensions

Loading ratio, glass particle size, and air Reynolds number effects on pressure drop and flow characteristics of air-solid suspension in turbulent pipe flo

Transportation in Social Media: an automatic classifier for travel-related tweets

In the last years researchers in the field of intelligent transportation systems have made several efforts to extract valuable information from social media streams. However, collecting domain-specific data from any social media is a challenging task demanding appropriate and robust classification methods. In this work we focus on exploring geo-located tweets in order to create a travel-related tweet classifier using a combination of bag-of-words and word embeddings. The resulting classification makes possible the identification of interesting spatio-temporal relations in S\~ao Paulo and Rio de Janeiro