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Interactive Environment (interactive + environment)
Selected AbstractsHIGH-DIMENSIONAL LEARNING FRAMEWORK FOR ADAPTIVE DOCUMENT FILTERING,COMPUTATIONAL INTELLIGENCE, Issue 1 2003Wai Lam We investigate the unique requirements of the adaptive textual document filtering problem and propose a new high-dimensional on-line learning framework, known as the REPGER (relevant feature pool with good training example retrieval rule) algorithm to tackle this problem. Our algorithm possesses three characteristics. First, it maintains a pool of selective features with potentially high predictive power to predict document relevance. Second, besides retrieving documents according to their predicted relevance, it also retrieves incoming documents that are considered good training examples. Third, it can dynamically adjust the dissemination threshold throughout the filtering process so as to maintain a good filtering performance in a fully interactive environment. We have conducted experiments on three document corpora, namely, Associated Press, Foreign Broadcast Information Service, and Wall Street Journal to compare the performance of our REPGER algorithm with two existing on-line learning algorithms. The results demonstrate that our REPGER algorithm gives better performance most of the time. Comparison with the TREC (Text Retrieval Conference) adaptive text filtering track participants was also made. The result shows that our REPGER algorithm is comparable to them. [source] BetweenIT: An Interactive Tool for Tight InbetweeningCOMPUTER GRAPHICS FORUM, Issue 2 2010Brian Whited Abstract The generation of inbetween frames that interpolate a given set of key frames is a major component in the production of a 2D feature animation. Our objective is to considerably reduce the cost of the inbetweening phase by offering an intuitive and effective interactive environment that automates inbetweening when possible while allowing the artist to guide, complement, or override the results. Tight inbetweens, which interpolate similar key frames, are particularly time-consuming and tedious to draw. Therefore, we focus on automating these high-precision and expensive portions of the process. We have designed a set of user-guided semi-automatic techniques that fit well with current practice and minimize the number of required artist-gestures. We present a novel technique for stroke interpolation from only two keys which combines a stroke motion constructed from logarithmic spiral vertex trajectories with a stroke deformation based on curvature averaging and twisting warps. We discuss our system in the context of a feature animation production environment and evaluate our approach with real production data. [source] The Polder Computing Environment: a system for interactive distributed simulationCONCURRENCY AND COMPUTATION: PRACTICE & EXPERIENCE, Issue 13-15 2002K. A. Iskra Abstract The paper provides an overview of an experimental, Grid-like computing environment, Polder, and its components. Polder offers high-performance computing and interactive simulation facilities to computational science. It was successfully implemented on a wide-area cluster system, the Distributed ASCI Supercomputer. An important issue is an efficient management of resources, in particular multi-level scheduling and migration of tasks that use PVM or sockets. The system can be applied to interactive simulation, where a cluster is used for high-performance computations, while a dedicated immersive interactive environment (CAVE) offers visualization and user interaction. Design considerations for the construction of dynamic exploration environments using such a system are discussed, in particular the use of intelligent agents for coordination. A case study of simulatedabdominal vascular reconstruction is subsequently presented: the results of computed tomography or magnetic resonance imaging of a patient are displayed in CAVE, and a surgeon can evaluate the possible treatments by performing the surgeries virtually and analysing the resulting blood flow which is simulated using the lattice-Boltzmann method. Copyright © 2002 John Wiley & Sons, Ltd. [source] GeoDa: An Introduction to Spatial Data AnalysisGEOGRAPHICAL ANALYSIS, Issue 1 2006Luc Anselin This article presents an overview of GeoDaÔ, a free software program intended to serve as a user-friendly and graphical introduction to spatial analysis for non-geographic information systems (GIS) specialists. It includes functionality ranging from simple mapping to exploratory data analysis, the visualization of global and local spatial autocorrelation, and spatial regression. A key feature of GeoDa is an interactive environment that combines maps with statistical graphics, using the technology of dynamically linked windows. A brief review of the software design is given, as well as some illustrative examples that highlight distinctive features of the program in applications dealing with public health, economic development, real estate analysis, and criminology. [source] Interaction between caregivers and families expecting a malformed childJOURNAL OF ADVANCED NURSING, Issue 1 2003Hanna Maijala MNSc RN Background. Earlier research has shown that the care of families expecting a malformed child should be intensified and that the topic is understudied. Aim. This study aimed at generating a practical nursing theory of interaction between caregivers and families expecting a malformed child, as experienced by families. Methods. A grounded theory study was undertaken at a university hospital, Finland. Data consisted of semi-structured interviews with 29 mothers and fathers, analysed using the constant comparative method. Findings. The interaction process starts with the confirmation of the diagnosis. It usually comes as a shock to the parents, and gives rise to questions about the nature of the malformation, family members' relationship with themselves, family relationships and relationships with people outside the family. These questions are crucial to the family's coping and form the core of interaction. Families' own coping strategies are either reinforced or undermined by caregivers' actions and are reflected in parents' expectations about caregivers, which in part account for their actions and experiences of interaction. The care system as an interactive environment is part of a process which results in the experiences of being helped or being left without help. The core of the interaction process comprises two dimensions: gaining strength and losing strength in relation to malformation issues. Conclusions. The findings of the study are consistent with earlier research and complement it by providing a detailed delineation of the interaction from the perspective of the family. They can be used to formulate recommendations for improving caregivers' interactive skills and awareness of the topic through training. The care system should be developed to ensure that families receive psychological support and that the family as a whole receives proper care. Consideration of the viewpoint of siblings is a challenge for further research. [source] Integrated modeling environment for statewide assessment of groundwater vulnerability from pesticide use in agriculture,PEST MANAGEMENT SCIENCE (FORMERLY: PESTICIDE SCIENCE), Issue 8 2004Audra Eason Abstract Atrazine, a herbicide widely used for corn production in the Midwest, has been detected in groundwater of several states, and has been identified as a possible human carcinogen. With the widespread use of pesticides in crop production, and the frequent detection of these chemicals in groundwater, large-scale risk assessments would help water resource managers to identify areas that are more susceptible to contamination and implement practices to ameliorate the problem. This paper presents an integrated, visual and interactive system for predicting potential environmental risks associated with pesticide contamination at spatial scales ranging from fields to landscapes and regions. The interactive system extends the predictive ability of the Pesticide Root Zone Model Release 2.0 (PRZM-2) to a landscape and statewide scale through integration with a geographic information system (GIS), graphical user interface and environmental databases. Predictions of statewide (Iowa) vulnerability of groundwater from atrazine leaching below the unsaturated zone were made to demonstrate the utility of the system, and the results were used in risk assessment. In the example application, atrazine fate and transport were evaluated using long-term climatic data (1980,1989) in combination with several environmental databases (eg STATSGO soils database) and exposure risks were expressed in terms of the probability of the predicted pesticide concentrations exceeding the maximum contaminant level (MCL) for drinking water. The results indicate that the predicted pesticide concentrations were significantly lower than the EPA-established MCL. In addition to providing an interactive environment for landscape-level assessment of potential risks from pesticide leaching, the system significantly reduces the time and resources needed to organize and manipulate data for use with PRZM-2, and provides an analytical framework for evaluating groundwater-leaching impacts of pesticide management practices. Copyright © 2004 Society of Chemical Industry [source] DSP-BASED CONTROLLER DESIGN OF AN XY-TABLE AND ITS APPLICATION TO VIRTUAL FISHING SYSTEMASIAN JOURNAL OF CONTROL, Issue 3 2007Ming-Shyan Wang ABSTRACT The paper is focused on controller design of a hybrid XY-table equipped with both a PMSM and a PMLSM and application of the XY-table system to a virtual fishing system (VFS), which incorporates a boat simulator, an interactive fishing rod system, virtual reality fishing scenes, and a player in the loop. The fishing rod system consists of the XY-table system acting as interactive force feedback hardware. Adaptive fuzzy control is adopted in the controller to track the command trajectory. The fishing boat is simulated by a three-axis manipulator, which is composed of three pneumatic cylinders serving as extensive linkages. Through the shunt combination of the cylinders, the movement of the fishing boat can be arbitrarily adjusted. Summarily, VFS creates a spontaneous and interactive environment and offers the experience of fishing in a remote location on the sea at home or at the amusement park. [source] | ||||||||||