Final Report For FSCATT DIS Compliance Testing

Report describes the testing of the Fire Support Combined Arms Tactical Trainer distributed interactive simulation software program, and the results of that testing

G-fire station : fire simulation from desktop to grid

CROSS-Fire is a research project, funded by the Portuguese NGI and led by UMinho, and focused on topics related to decision making to control forest fires and on the porting to the grid of FireStation - a fire growth simulation application. G-FireStation exploits Grid capabilities in order to have a faster execution, to manage large data input/output files, to create a large data base of simulation results and to allow the interactive control of the simulations through a graphical user interfaceFC

Interactive simulation of fire, burn and decomposition

This work presents an approach to effectively integrate into one unified modular fire simulation framework the major processes related to fire, namely: a burning process, chemical combustion, heat distribution, decomposition and deformation of burning solids, and rigid body simulation of the residue. Simulators for every stage are described, and the modular structure enables switching to different simulators if more accuracy or more interactivity is desired. A “Stable Fluids” based three gas system is used to model the combustion process, and the heat generated during the combustion is used to drive the flow of the hot air. Objects, if exposed to enough heat, ignite and start burning. The decomposition of the burning object is modeled as a level set method, driven by the pyrolysis process, where the burning object releases combustible gases. Secondary deformation effects, such as bending burning matches and crumpling burning paper, are modeled as a proxy based deformation. Physically based simulation, done at interactive rates, enables the user to ef- ficiently test different setups, as well as interact and change the conditions during the simulation. The graphics card is used to generate additional frames for real-time visualization. This work further proposes a method for controlling and directing high resolution simulations. An interactive coarse resolution simulation is provided to the user as a “preview” to control and achieve the desired simulation behavior. A higher resolution “final” simulation that creates all the fine scale behavior is matched to the preview simulation such that the preview and final simulations behave in a similar manner. In this dissertation, we highlighted a gap within the CG community for the simulation of fire. There has not previously been a physically based yet interactive simulation for fire. This dissertation describes a unified simulation framework for physically based simulation of fire and burning. Our results show that our implementation can model fire, objects catching fire, burning objects, decomposition of burning objects, and additional secondary deformations. The results are plausible even at interactive frame rates, and controllable

Interactive interoperability between firefighters and fire protection equipment

An operation of fire protection equipment may be dangerous for intervening fire-fighters in some cases. Therefore, it is necessary, in addition to the analysis of fire development which includes a description of real fire scenarios, to affect active response of fire safety measures.In 2009 the complex automatic fire protection equipment of coal handling route was installed into operation in Tušimice power plant. However, after starting the operation it showed that activation of the extinguishing system on the inclined conveyor bridge threatened the health and life of fire-fighters conducting an intervention.In the paper an interactive algorithm that ensures a flexible cooperation intervening fire-fighters and automatic extinguishing system without a risk of fire-fighters life is investigated. Possible fire scenario is analysed in FDS. By numerical simulation applicability of the algorithm is confirmed. Development of gas temperatures in strong chimney flow gives also a view into part of mechanical response of structure

An automated cluster/grid task and data management system

CROSS-Fire is a research project focused on wildfire management related topics, that defines an architecture integrating three main components: the CROSS-Fire Platform, implemented as an OGS-WS compatible Web Processing System layer; a Spatial Data Infrastructure platform; a Distributed Computing Infrastructure, supporting both cluster and grid environments. The main objective is to exploit Cluster/Grid middleware in order to: i) allow the concurrent execution of multiple and large simulations, ii) access and manage large data input/output files, iii) create and handle a database of past simulations and iv) allow remote and interactive monitoring of the fire simulation growth. The developed tools manage the tasks and control the data flow between components, providing the advantage of fast implementation and easy testing, on cluster and grid environments

Fast, Scalable, and Interactive Software for Landau-de Gennes Numerical Modeling of Nematic Topological Defects

Numerical modeling of nematic liquid crystals using the tensorial Landau-de Gennes (LdG) theory provides detailed insights into the structure and energetics of the enormous variety of possible topological defect configurations that may arise when the liquid crystal is in contact with colloidal inclusions or structured boundaries. However, these methods can be computationally expensive, making it challenging to predict (meta)stable configurations involving several colloidal particles, and they are often restricted to system sizes well below the experimental scale. Here we present an open-source software package that exploits the embarrassingly parallel structure of the lattice discretization of the LdG approach. Our implementation, combining CUDA/C++ and OpenMPI, allows users to accelerate simulations using both CPU and GPU resources in either single- or multiple-core configurations. We make use of an efficient minimization algorithm, the Fast Inertial Relaxation Engine (FIRE) method, that is well-suited to large-scale parallelization, requiring little additional memory or computational cost while offering performance competitive with other commonly used methods. In multi-core operation we are able to scale simulations up to supra-micron length scales of experimental relevance, and in single-core operation the simulation package includes a user-friendly GUI environment for rapid prototyping of interfacial features and the multifarious defect states they can promote. To demonstrate this software package, we examine in detail the competition between curvilinear disclinations and point-like hedgehog defects as size scale, material properties, and geometric features are varied. We also study the effects of an interface patterned with an array of topological point-defects.Comment: 16 pages, 6 figures, 1 youtube link. The full catastroph

The Simulation System for Propagation of Fire and Smoke

This work presents a solution for a real-time fire suppression control system. It also serves as a support tool that allows creation of virtual ship models and testing them against a range of representative fire scenarios. Model testing includes generating predictions faster than real time, using the simulation network model developed by Hughes Associates, Inc., their visualization, as well as interactive modification of the model settings through the user interface. In the example, the ship geometry represents ex-USS Shadwell, test area 688, imitating a submarine. Applying the designed visualization techniques to the example model revealed the ability of the system to process, store and render data much faster than the real time (in average, 40 times faster)

Dynamic Influence Networks for Rule-based Models

We introduce the Dynamic Influence Network (DIN), a novel visual analytics technique for representing and analyzing rule-based models of protein-protein interaction networks. Rule-based modeling has proved instrumental in developing biological models that are concise, comprehensible, easily extensible, and that mitigate the combinatorial complexity of multi-state and multi-component biological molecules. Our technique visualizes the dynamics of these rules as they evolve over time. Using the data produced by KaSim, an open source stochastic simulator of rule-based models written in the Kappa language, DINs provide a node-link diagram that represents the influence that each rule has on the other rules. That is, rather than representing individual biological components or types, we instead represent the rules about them (as nodes) and the current influence of these rules (as links). Using our interactive DIN-Viz software tool, researchers are able to query this dynamic network to find meaningful patterns about biological processes, and to identify salient aspects of complex rule-based models. To evaluate the effectiveness of our approach, we investigate a simulation of a circadian clock model that illustrates the oscillatory behavior of the KaiC protein phosphorylation cycle.Comment: Accepted to TVCG, in pres