Data stream mining in ubiquitous environments: state-of-the-art and current directions

In this article, we review the state-of-the-art techniques in mining data streams for mobile and ubiquitous environments. We start the review with a concise background of data stream processing, presenting the building blocks for mining data streams. In a wide range of applications, data streams are required to be processed on small ubiquitous devices like smartphones and sensor devices. Mobile and ubiquitous data mining target these applications with tailored techniques and approaches addressing scarcity of resources and mobility issues. Two categories can be identified for mobile and ubiquitous mining of streaming data: single-node and distributed. This survey will cover both categories. Mining mobile and ubiquitous data require algorithms with the ability to monitor and adapt the working conditions to the available computational resources. We identify the key characteristics of these algorithms and present illustrative applications. Distributed data stream mining in the mobile environment is then discussed, presenting the Pocket Data Mining framework. Mobility of users stimulates the adoption of context-awareness in this area of research. Context-awareness and collaboration are discussed in the Collaborative Data Stream Mining, where agents share knowledge to learn adaptive accurate models.

An evaluation of decadal probability forecasts from state-of-the-art climate models

While state-of-the-art models of Earth's climate system have improved tremendously over the last 20 years, nontrivial structural flaws still hinder their ability to forecast the decadal dynamics of the Earth system realistically. Contrasting the skill of these models not only with each other but also with empirical models can reveal the space and time scales on which simulation models exploit their physical basis effectively and quantify their ability to add information to operational forecasts. The skill of decadal probabilistic hindcasts for annual global-mean and regional-mean temperatures from the EU Ensemble-Based Predictions of Climate Changes and Their Impacts (ENSEMBLES) project is contrasted with several empirical models. Both the ENSEMBLES models and a “dynamic climatology” empirical model show probabilistic skill above that of a static climatology for global-mean temperature. The dynamic climatology model, however, often outperforms the ENSEMBLES models. The fact that empirical models display skill similar to that of today's state-of-the-art simulation models suggests that empirical forecasts can improve decadal forecasts for climate services, just as in weather, medium-range, and seasonal forecasting. It is suggested that the direct comparison of simulation models with empirical models becomes a regular component of large model forecast evaluations. Doing so would clarify the extent to which state-of-the-art simulation models provide information beyond that available from simpler empirical models and clarify current limitations in using simulation forecasting for decision support. Ultimately, the skill of simulation models based on physical principles is expected to surpass that of empirical models in a changing climate; their direct comparison provides information on progress toward that goal, which is not available in model–model intercomparisons.

Space Window*: an exhibition devoted to Man in Space and Space in Art

Call for submissions to participate in a show in the Bell Gallery, List Art Building at Brown University. Co-sponsored by the RI State Council on the Arts and the Providence Inner City Arts Association.

Mutação constitucional do controle difuso no Brasil? Uma análise do papel do Senado Federal diante do art. 52, X, da Constituição

O objetivo do presente estudo é testar a plausibilidade da tese de que teria ocorrido mutação constitucional no sistema de controle de constitucionalidade no Brasil, especificamente quanto à competência conferida pela Constituição ao Senado Federal para suspender a eficácia de lei ou ato normativo declarado inconstitucional no controle difuso de constitucionalidade. Esse argumento foi empregado pelo Ministro Gilmar Mendes, do Supremo Tribunal Federal, no julgamento da Reclamação 4335-5/AC. Para analisar a consistência dessa tese, (a) discutiu-se as condições necessárias à plausibilidade de um argumento de mutação constitucional na ordem jurídica brasileira e (b) realizou-se uma análise empírica do papel do Senado Federal diante do art. 52, X da Constituição. Feita a coleta de dados, e aplicado o conceito de mutação constitucional sobre eles, concluiu-se que não merece prosperar a tese do Min. Gilmar Mendes em que defende o reconhecimento de “autêntica mutação constitucional” do art. 52, X da Constituição Federal. Como resultado, defende se não ser possível dar plausibilidade a esse tipo de argumentação apenas tendo por base jurisprudência, doutrina e argumentação tipicamente constitucional, necessitando de base empírica que o permita atribuir mais solidez e consistência a qualquer argumento de mutação constitucional na ordem jurídica brasileira.

Transient stability analysis of electric energy systems via a fuzzy ART-ARTMAP neural network

This work presents a methodology to analyze transient stability (first oscillation) of electric energy systems, using a neural network based on ART architecture (adaptive resonance theory), named fuzzy ART-ARTMAP neural network for real time applications. The security margin is used as a stability analysis criterion, considering three-phase short circuit faults with a transmission line outage. The neural network operation consists of two fundamental phases: the training and the analysis. The training phase needs a great quantity of processing for the realization, while the analysis phase is effectuated almost without computation effort. This is, therefore the principal purpose to use neural networks for solving complex problems that need fast solutions, as the applications in real time. The ART neural networks have as primordial characteristics the plasticity and the stability, which are essential qualities to the training execution and to an efficient analysis. The fuzzy ART-ARTMAP neural network is proposed seeking a superior performance, in terms of precision and speed, when compared to conventional ARTMAP, and much more when compared to the neural networks that use the training by backpropagation algorithm, which is a benchmark in neural network area. (c) 2005 Elsevier B.V. All rights reserved.

Electric load forecasting using a fuzzy ART&ARTMAP neural network

This work presents a neural network based on the ART architecture ( adaptive resonance theory), named fuzzy ART& ARTMAP neural network, applied to the electric load-forecasting problem. The neural networks based on the ARTarchitecture have two fundamental characteristics that are extremely important for the network performance ( stability and plasticity), which allow the implementation of continuous training. The fuzzy ART& ARTMAP neural network aims to reduce the imprecision of the forecasting results by a mechanism that separate the analog and binary data, processing them separately. Therefore, this represents a reduction on the processing time and improved quality of the results, when compared to the Back-Propagation neural network, and better to the classical forecasting techniques (ARIMA of Box and Jenkins methods). Finished the training, the fuzzy ART& ARTMAP neural network is capable to forecast electrical loads 24 h in advance. To validate the methodology, data from a Brazilian electric company is used. (C) 2004 Elsevier B.V. All rights reserved.

Cenografia teatral: uma análise dos aspectos cênicos da peça Bê-a-Bá Brasil - memória, sonho e fantasia

The main objective of this project step is the evolution of scenery matter on the occidental theater media, related to space and technical possibilities of the theatrical building and space on history of contemporary arts. The main point is that scenery must communicate with a specific matter. Something in touch with the plot speeches. Something that makes all the plot elements to communicate. Acting has an specific message to deliver, and that message is what really matter to the viewer of the show. “It’s never late to state that scenery is not a decoration, or just an interior composition. Scenery is not a painting or a sculpture: it’s an integrated art form. It’s never too repetitive to say that scenery is a result from the composition with lights, shadows, shapes, lines and volumes, in balance and on harmony as a whole, that create movement and contrast” (Dias, 2001) On the second step of the project, the objective is to analyze the building process and the scenery aspects of the “Be-a-bá Brasil” show, using illustrations, pictures and analysis data of the context the show was inserted on

Engineered nanoparticles and organic matter: a review of the state-of-the-art

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Clinical evaluation of multiple-surface ART restorations: three-year follow-up

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Identifique-se: Exposição de Mail Art, uma poética compartilhada

This work refers to a cut of my artistic creation path with some reflections on the subject other. Mail Art has been an alternative trend of art / avant-garde, where communication between artists networks is the goal to be achieved, therefore, from this statement, was approached some historical and particular aspects regarding the post and its contingencies in the art / forefront. Share this moment of academic completion with a postcard exhibition that will take place through the agency of other participating artists. To do so, were invited artists from the theme IDENTIFY UP to send work in postcard size with the exclusive use of the Post Office. The exhibition event will take place in the Gallery of the Art Institute. Participant of other similar projects, I believe I experienced a new role: who calls, organizes and rules.

Identifique-se: Exposição de Mail Art, uma poética compartilhada

This work refers to a cut of my artistic creation path with some reflections on the subject other. Mail Art has been an alternative trend of art / avant-garde, where communication between artists networks is the goal to be achieved, therefore, from this statement, was approached some historical and particular aspects regarding the post and its contingencies in the art / forefront. Share this moment of academic completion with a postcard exhibition that will take place through the agency of other participating artists. To do so, were invited artists from the theme IDENTIFY UP to send work in postcard size with the exclusive use of the Post Office. The exhibition event will take place in the Gallery of the Art Institute. Participant of other similar projects, I believe I experienced a new role: who calls, organizes and rules.