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A thermodynamic counterpart of the Axelrod model of social influence: The one-d...
Gandica, Y.; Medina, E.; Bonalde, I.We propose a thermodynamic version of the Axelrod model of social influence. In one-dimensional (1D) lattices, the thermodynamic model becomes a coupled Potts model with a bonding interaction that increases with the site matching traits. We analytically calculate thermodynamic and critical properties for a 1D system and show that an order–disorder phase transition only occurs at T=0 independent of the number of...
Cerebral toxoplasmosis in AIDS patients, CT and MRI images and differential dia...
Miguel, J; Serviço de Neurorradiologia e Anatomia-Patológica, Hospital Egas Moniz, Lisboa.; Champalimaud, J L; Borges, A; Chorão, M; Branco, GCranial computed-tomographies (CT) and magnetic resonance imaging (MRI) of 14 patients with AIDS and central nervous system toxoplasmosis (CNST) were reviewed. In spite of the low specificity of CT and MRI findings in CNS mass lesions of AIDS patients, there are some features which have been observed as more typical of CNST, namely: 94.9% of the lesions were round shaped and 94.5% had ring or nodular enhancemen...
Semiologic considerations and clinical significance of magnetic resonance in 11...
Mauricio, J C; Fernandes, A; Cannas, J; Goulão, A; Medina, EThe author's experience with high-field Magnetic Resonance (Signa, 1.5 T, G.E.) in 11 cases of intracranial aneurysms (6 presenting as space lesion and 5 with symptoms of rupture) is reported. Spin-echo, gradient-echo and GRASS (fast-scan or flip-angle) sequences have been used and results compared with those of CT-scan and angiography. Magnetic Resonance findings, relating to blood flow and oxidation of haemog...
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