Quantum Zakharov equations are obtained to describe the nonlinear interaction between quantum Langmuir waves and ion-acoustic waves. These applied two model cases, namely, four-wave decay instability. In case of instability, sufficiently large effects tend suppress For lead results similar those classical instability except for correction terms in dispersion relations. Some considerations regarding aspects also offered.

This paper presents a model for studying the impact of individual agent characteristics in emergent groups, based on evacuation efficiency as result local interactions. We used physically crowd simulation proposed by Helbing et al. (2000) and generalized it order to deal with different individualities group behaviors. In addition, we present framework visualize virtual agents discuss obtained results. A variety simulations parameter sets shows significant scenario.

This paper presents a tool, Vis-Health, for analysis and visualization of public health data covariance with variables chosen by the user, in order to give her/him clues better understanding disease occurrences. Vis-Health is system that allows: (a) government authorities store different nature from methods, (b) user (common citizen or government) choose an interest variable as dependent(output) n other dependent (or inputs), study between them (c) visualize result clear way. The made use...

Participatory cities are those that allow the participation of citizens in construction and improvement their common daily life. In this work we present a tool for participation, allowing to register occurrences as well take knowledge about global geographic status city on variety contexts (security, transit, etc.). However, like that, fed by people, certainly will deal with large amount information, distributed geographically. To accomplish precise criterion visualizing resultant density...

New information and communication technologies enable a better management of the available resources in smart city. Leaders need tools to analyze data for decisions, anticipate problems resolve them proactively. In this context, article proposes simulation tool interaction typical cities occurrences like criminal police. The both occurrences, including their densities, are inserted visualized on city map. Each record is marked GPS point where it happened. From these inputs data, interactions...

Processos industriais em bateladas são empregados com frequência na produção de certos itens. Tais processos disponibilizam uma estrutura dados peculiar; diante disso, existe um crescente interesse no desenvolvimento gráficos controle multivariados mais apropriados para seu monitoramento. Investiga-se aqui abordagem recente que utiliza baseados método Statis. O Statis constitui-se técnica exploratória permite avaliar similaridade entre matrizes dados. Entretanto, essa considera a contexto...

Abstract The present work is an attempt to approach the modeling and visualization of individual opinion towards extremism in a society. We consider scenario where two opposite concepts are on dispute for exclusivity, via effort individuals convince each other their own oppinion/decision. power convincement over community depends its influence, communicability enthusiasm (extremism) it defends side. Here we propose model taking these three factors into consideration. analyze system changes...

In this paper we identify phase-locked states among the solutions of Zakharov equations. Locked appear as resonant island chains in appropriate Poincar\'e plots, with relevant surface section obtained by projecting out full dynamical set on a subspace defined terms pair center-manifold variables. This allows an accurate canonical description system immediately after inverse pitchfork bifurcation destabilizes initial homogeneous steady state. If one is very close to point, nonlinear...

The nonlinear dynamics of a finite-amplitude Alfvén wave in dispersive modulational regime is analysed. Use made conservative model to show that turbulence may arise via deterministic chaos. behaviour the system studied as one varies initial amplitude pump wave, dispersion parameter and plasma β.

Natural or man-made disasters cause damage to life and property. Lack of appropriate emergency management increases the physical loss life. D-Aid, smartphone App proposed by this article, intends help volunteers relief teams quickly map aid victims a disaster. Anyone can put an occurrence after disaster on web streamlining decentralizing information access. Through visualization techniques like heat maps voronoi diagrams implemented in D-Aid app also everyone easily get about amount victims,...

In this paper we propose a high performance searching-based chaotic cipher. Experiments shows that its efficiency is comparable to the efficiencies of some widely used and known ciphers, namely, AES, RC4 Sosemanuk. Also, better than recently proposed ciphers same kind. The cryptosystem independence with respect statistical characteristics plain texts, which prevents attacks. results tests suggest cipher can be competitive for practical usage.

Most of the good mathematical models available for natural phenomena are non linear, and these often chaotic. Sensitive dependence on initial conditions can foil any attempt at prediction. In fact, measurement errors in collecting data, intrinsic to observational method, will propagate under computational use model. With this, final results obtained from model may be useless when compared with real future phenomena. Even strictly context, sensitive makes a chaotic system S unpredictable...

We present a model for the evolution of opinion distribution in society with respect to two excluding concepts or choices A and B. It is considered situation where are on dispute exclusivity, through consecutive interactions among consumers, one trying persuade other their position. The strength influence each consumer over those it relates with, depends its social status as well enthusiasm (extremism degree) defends side. Here we propose taking these factors into consideration using an...