Technological Policing: Big data vs real data

Big Data assume um papel preponderante na intervenção nas mais diversas áreas, à qual não é alheia a área policial. O presente artigo teórico procura de abrir caminhos para a compreensão do fenómeno Big Data na intervenção policial a nível micro e macro, enquanto ferramenta inserida na tecnologia policial. Por outro lado, apresentar o conceito agregado à data real, e o seu distanciamento na intervenção policial. A metodologia utilizada para o efeito foi a de análise bibliográfica, em que se apresentar critérios de inclusão e exclusão, por forma, a consolidar a análise em questão. Na perspetiva dos autores salienta-se que enquanto instrumento da tecnologia policial, Big Data providencia a informação necessária, em termos de volume e quantidade, tendo em conta, os diferentes níveis de intervenção policial, e é um recurso que incrementa a sua eficiência na manutenção da ordem pública.Big Data assumes a preponderant role in the intervention in the most diverse areas of intervention, to which the police area is no stranger. This theoretical article seeks to open ways to understand the Big Data phenomenon in police intervention at micro and macro levels, as a tool inserted in police technology. On the other hand, to present the concept aggregated to real data, and its distancing in police intervention. The methodology used for this purpose was literature analysis, in which inclusion and exclusion criteria are presented to consolidate the analysis in question. From the authors' perspective, it is pointed out that as an instrument of police technology, Big Data provides the necessary information, in terms of volume and quantity, taking into account the different levels of police intervention, and is a resource that increases efficiency in the maintenance of public order.El Big Data assume un papel preponderante en la intervención en los más diversos ámbitos de intervención, al que no es ajeno el área policial. Este artículo teórico pretende abrir caminos para entender el fenómeno del Big Data en la intervención policial a nivel micro y macro, como herramienta inserta en la tecnología policial. Por otro lado, presentar el concepto agregado a los datos reales, y su distanciamiento en la intervención policial. La metodología utilizada para ello fue el análisis bibliográfico, en el que se presentan los criterios de inclusión y exclusión para consolidar el análisis en cuestión. Desde la perspectiva de los autores, se señala que como instrumento de la tecnología policial, el Big Data proporciona la información necesaria, en volumen y cantidad, teniendo en cuenta los diferentes niveles de intervención policial, y es un recurso que aumenta la eficiencia en el mantenimiento del orden público.info:eu-repo/semantics/acceptedVersio

Spatio-temporal conjecture for diffusion

We present here a conjecture about the equivalence between the noise density of states of a system governed by a generalized Langevin equation and the fluctuation in the energy density of states in a Hamiltonian system. We present evidence of this for a disordered Heisenberg system.Comment: 6 pages, 1 figure. Submitted to Physica

Synchronization in the presence of memory

We study the effect of memory on synchronization of identical chaotic systems driven by common external noises. Our examples show that while in general synchronization transition becomes more difficult to meet when memory range increases, for intermediate ranges the synchronization tendency of systems can be enhanced. Generally the synchronization transition is found to depend on the memory range and the ratio of noise strength to memory amplitude, which indicates on a possibility of optimizing synchronization by memory. We also point out on a close link between dynamics with memory and noise, and recently discovered synchronizing properties of networks with delayed interactions

The Ferromagnetic Potts model under an external magnetic field: an exact renormalization group approach

The q-state ferromagnetic Potts model under a non-zero magnetic field coupled with the 0^th Potts state was investigated by an exact real-space renormalization group approach. The model was defined on a family of diamond hierarchical lattices of several fractal dimensions d_F. On these lattices, the renormalization group transformations became exact for such a model when a correlation coupling that singles out the 0^th Potts state was included in the Hamiltonian. The rich criticality presented by the model with q=3 and d_F=2 was fully analyzed. Apart from the Potts criticality for the zero field, an Ising-like phase transition was found whenever the system was submitted to a strong reverse magnetic field. Unusual characteristics such as cusps and dimensional reduction were observed on the critical surface.Comment: 8 pages, 6 figures. Accepted to be published in Phys. Rev B (2006

Anisotropic Energy Distribution in Three-Dimensional Vibrofluidized Granular Systems

We examine the energy distribution in a three-dimensional model granular system contained in an open cylinder under the influence of gravity. Energy is supplied to the system by a vibrating base. We introduce spatially resolved, partial particle-particle ``dissipations'' for directions parallel and perpendicular to the energy input, respectively. Energy balances show that the total (integrated) ``dissipation'' is less than zero in the parallel direction while greater than zero in the perpendicular directions. The energy supplied to the perpendicular directions is dissipated by particle-wall collisions. We further define a fractional energy transfer, which in the steady state represents the fraction of the power supplied by the vibrating base that is dissipated at the wall. We examine the dependence of the fractional energy transfer on the number of particles, the velocity of the vibrating base, the particle-particle restitution coefficient, and the particle-wall restitution coefficient. We also explore the influence of the system parameters on the spatially dependent partial dissipations.Comment: 10 pages, 10 figures, RevTeX forma