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Modeling, Simulation, and Visualization Methods: The 2013 WorldComp International Conference Proceedings

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New research by international contributors on Modeling, Simulation, and Visualization Methods

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Session Simulation and Numerical Methods

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Anti-Symmetry and Logic Simulation

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

3

Anti-Symmetry and Logic Simulation

Peter M. Maurer

Dept. of Computer Science

Baylor University

Waco, Texas 76798-7356

Abstract – Like ordinary symmetries, anti-symmetries are defined by relations between function cofactors. For ordinary symmetries, two cofactors must be equal, for anti-symmetries two cofactors must be complements of one another. This paper shows that anti-symmetries can be used to improve simulation performance in the same manner as ordinary symmetries.

Detailed detection, clustering and simulation algorithms are given along with a set of experimental results to demonstrate the effectiveness of the algorithms. These results show that antisymmetries can be just as effective as ordinary symmetries in enhancing simulation performance. In fact, in some cases, antisymmetries give better performance than ordinary symmetries.

Different relations between these cofactors can be used to define different types of symmetry [12, 13].

One of the latest developments in symmetry detection is matrixbased symmetry [7]. All permutations can be specified as nonsingular matrices, but not all non-singular matrices can be specified as permutations. Thus matrix-based symmetry is an extension of permutation-based symmetry. Conjugate symmetry is one form of matrix-based symmetry, some forms of which can be detected using cofactor-relations.

 

Fire and Flame Simulation using Particle Systems and Graphical Processing Units

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10

Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

Fire and Flame Simulation using Particle Systems and Graphical

Processing Units

T.S. Lyes and K.A. Hawick

Computer Science, Massey University, North Shore 102-904, Auckland, New Zealand email: { t.s.lyes, k.a.hawick }@massey.ac.nz

Tel: +64 9 414 0800 Fax: +64 9 441 8181

February 2013

ABSTRACT

Simulating fire, flames or other natural phenomena can be difficult because of the inherently complex systems used to model them, while also requiring an adequate amount of realism visually. Simulating such a system in real-time can also be a problem if the system is too large, so a parallel computing techniques can be used to good effect. Particle systems have been shown to simulate flames and fires particularly well at relatively low computational cost. We describe how a simple particle system approach can be used to simulate a fire or flame in real-time in conjunction with using data parallelization, achieving a substantial performance speed up on graphical processing units (GPUs). Using

 

Interactive Simulation and Visualisation of Falling Sand Pictures on Tablet Computers

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

17

Interactive Simulation and Visualisation of Falling Sand Pictures on

Tablet Computers

B. Pearce and K.A. Hawick

Computer Science, Massey University, Albany, North Shore 102-904, Auckland, New Zealand email: brad.pearce.nz@gmail.com, k.a.hawick@massey.ac.nz

Tel: +64 9 414 0800 Fax: +64 9 441 8181

February 2013

ABSTRACT

Sand pictures are made from a mix of coloured sands and water or oil sandwiched between two sheets of glass are a common desktop amusement. However, they also provide a good example of mixing and layering in materials science. We construct a lattice-based simulation of a sand picture based around the Kawasaki spin-exchange model with empirical couplings between cells. A Monte Carlo stochastic dynamic scheme is used to update pairs of neighboring cells using a Boltzmann like energy controlled probability process. The sand cells then diffuse around, with a preference parameter for sand to adhere to other sand cells of the same or different types. This model can be perturbed with a preferred directional gravitational force that leads to nearly correct physical phase separation of the coloured sands. The model provides a visually realistic simulation that can be rendered in real time. We implement this using Android and

 

Modulo 10M Calculator Increases Simulation Precision

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

Modulo 10M Calculator Increases Simulation Precision

Intelligence and Information Systems, Raytheon Company, Aurora, Colorado, USA

Scott Imhoff, 16800 E. CentreTech Parkway, Aurora, CO 80012

Scott_Imhoff@Raytheon.com, (720)-858-4287

Palak Thakkar, 16800 E. CentreTech Parkway, Aurora, CO 80012

Palak.P.Thakkar@Raytheon.com, (720)-858-4260

Contact Author - Kendy Hall, 16800 E. CentreTech Parkway, Aurora, CO 80012

Kendy.Hall@Raytheon.com, (720)-858-4535

Thomas Wang, 16800 E. CentreTech Parkway, Aurora, CO 80012

Thomas.K.Wang@Raytheon.com, (720)-858-4253

MSV’13

2  32 mod 5

Abstract – Many simulation software tools do not have arbitrary precision. This paper shows a way to increase the precision for multiplication of large numbers. This paper uses several tools from number theory together to provide a solution. The front part of the product (the most significant digits) is determined using a separate algorithm from the one used to determine the tail (the least significant digits). The least significant digits are determined by applying mod 10M iteratively to the product of the tails of the two numbers input to the product. The most and the least significant bits are concatenated together to form the output product. Casting out nines is used to check the result.

 

Fast Fluid Simulation on Three-Dimensional Parameterized Structured Grids

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

Fast Fluid Simulation on Three-Dimensional

Parameterized Structured Grids

V. Barroso, W. Celes, and M. Gattass

Department of Informatics, Tecgraf / PUC-Rio, Rio de Janeiro, RJ, Brazil

Abstract— We present a fast and straightforward Eulerian technique to simulate fluid flows on three-dimensional parameterized structured grids. The method’s primary design goal is the correct and efficient handling of fluid interactions with curved boundary walls and internal obstacles. This is accomplished by the use of per-cell Jacobian matrices to relate field derivatives in the world and parameter spaces, which allows us to solve the Navier-Stokes equations directly in the latter, where the domain discretization becomes a uniform grid. We describe how to apply Jacobian matrices to each step of a standard regular-grid-based simulator, including the solution of Poisson equations using both Jacobi iterations and a Biconjugate Gradient Stabilized sparse matrix solver. The technique is implemented efficiently in the CUDA programming language and takes full advantage of the massively parallel architecture of graphics cards.

 

Integration of Numerical Simulation Data with Immersive 3D Visualization

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

35

Integration of Numerical Simulation Data with Immersive 3D Visualization

Dong Fu1, John Moreland1, Litao Shen1,2, Bin Wu1, Chenn Zhou1,3

1

Center for Innovation through Visualization and Simulation

2

Electrical and Computer Engineering

3

Mechancial Engineering

Purdue University Calumet

Hammond, IN, USA

Abstract - The numerical simulation such as Computational

Fluid Dynamics (CFD) and Finite Element Analysis (FEA) have been used in engineering design, optimization and troubleshooting. The visualization of numerical simulation results, however, is normally limited to 2D screens. Work has already been accomplished to integrate CFD results with 3D

Virtual Reality (VR) visualization. This paper discusses how these previous efforts are being combined into a user-friendly software package named Center for Innovation through

Visualization (CIVS) 3D-Immersive Data Visualization (3DIDV) that simplifies the process of combining and interacting numerical results, scientific rendering, and photorealistic rendering in a virtual environment. The simulation results are intuitive to experts and non-experts by using the 3D-IDV software package. The 3D-IDV software package significantly enhanced the post possessing and the accessibility of simulation results.

 

Robust synchronization of a uncertain complex dynamical network with Markovian jumping topology via pinning sampled-data control

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42

Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

Robust synchronization of a uncertain complex dynamical network with Markovian jumping topology via pinning sampled-data control

J.H. Park1 , T.H. Lee1 , H.Y. Jung1 , S.M. Lee2

1 Department of EE/ICE, Yeungnam University, Kyongsan 712-749, Republic of Korea.

2 Department of Electronic Engineering, Daegu University, Kyongsan 712-714, Republic of Korea.

Corresponding author: moony@daegu.ac.kr (S.M. Lee)

Abstract— In this paper, the robust synchronization problem of a uncertain complex dynamical network with Markovian jumping topology via pinning sampled-data control is investigated. In order to make full use of the sawtooth structure characteristic of the sampling input delay, a discontinuous

Lyapunov functional is used based on the Extended Wirtinger

Inequality. By utilizing Finsler’s lemma, a new stability condition is obtained in terms of linear matrix inequalities

(LMIs) for the synchronization.

Keywords: Complex network, Synchronization, Markovian jumping, Robust control, Sampled-data control, Pinning method.

 

EpiViz: A Visual Simulation of an Epidemic Model using a Cellular Automaton

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

49

EpiViz: A Visual Simulation of an Epidemic Model using a Cellular Automaton

Matthew J. Farmer* and Tina V. Johnson

Department of Computer Science

Midwestern State University

Wichita Falls, TX 76308 matthew.farmer@mwsu.edu, tina.johnson@mwsu.edu

Abstract— Cellular Automata (CAs) are often used to simulate complex systems. One such application of a CA is to simulate the spread of disease through a susceptible population. This paper describes EpiViz, a CA-based epidemic simulator which uses a variety of input parameters, such as probability of infection, infectious period, vaccination rate, mode of infection, and probability of recovery to influence the resulting state of each entity in a CA over the course of a simulated disease outbreak. EpiViz then produces an animated representation of the outbreak. EpiViz allows a user to set disease related parameters prior to running a simulation to enable experimentation with various disease factors and to observe the effects on a susceptible population.

 

Simulation and Monitoring of a University Network for Bandwidth Efficiency Utilization

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54

Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

Simulation and Monitoring of a University Network for

Bandwidth Efficiency Utilization

Samuel N. John1, Charles Ndujuiba2, Robert Okonigene3, Ndeche Kenechukwu4

Department of Electrical and Information Engineering, Covenant University, Ota, Ogun State, Nigeria.

3

Department of Electrical and Electronics Engineering, Ambrose Alli University, Ekpoma, Edo State, Nigeria.

1 samuel.john@covenantuniversity.edu.ng, 2charles.ndujiuba@covenantuniversity.edu.ng,

3 robokonigene@yahoo.com, 4kene.ndeche@gmail.com

1,2,4

Abstract - As organization networks grow, it is essential that network administrators have knowledge of the different types of traffic traversing their networks and the methods of monitoring such traffic. Traffic monitoring and analysis is essential in order to troubleshoot and resolve issues as they occur in order not to bring the network to a total collapse.

There are numerous tools and methods available for network traffic monitoring and analysis, no administrator can effectively carry out such activities without in-depth knowledge of the traffic on the network. The inefficient management of the network traffic may result into network collapse or degradation and these may negatively affect the network performance of the Corporate or University networks. This paper therefore, proposed a developed network topology and simulation to monitor the network performance. Therefore, achieving an effective management and controlling of the increase traffic flows in the network.

 

Numeric simulation tool of the weaving process

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

Numeric simulation tool of the weaving process

J. Vilfayeau1, 2, F. Boussu1, 3, D. Crépin1, 3, D. Soulat1, 3, P. Boisse2

1

GEMTEX, ENSAIT, F-59100 Roubaix, France

2

LAMCOS, UMR CNRS 5514, INSA Lyon, F-69621 Villeurbanne Cedex, France

3

Univ. Lille Nord de France, F-59000 Lille, France

Abstract - This project is directly attached to the challenge in the aerospace industry to meet the new environmental requirements as the Kyoto Protocol [1]. One of the potential axis being explored through various national and European programs is the global reduction of the structure's mass when economic conditions are met. One of the mass reduction's solution can be provided by the introduction of composite materials. To achieve substantial gains in the design of new materials based fibrous reinforcements, it is necessary to have numerical models of textile structures accurate and reliable.

Currently, this modeling process is time consuming, random and can be costly.

 

Session - Visualization, Graphical User Interface, Tools and Techniques

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Triangular Prism Element Optimization for Mesh Visualization of Printed Circuit Boards

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

67

Triangular Prism Element Optimization for Mesh Visualization of

Printed Circuit Boards

A. Karen Daniels1 and B. Shu Ye2

1,2 Computer Science Department, University of Massachusetts Lowell, Lowell, MA, USA

Abstract— Prism elements arise in some printed circuit board modeling contexts, such as visualization and electromagnetic field modeling. Here we consider prisms built by extruding from triangular bases which result from constrained 2d Delaunay triangulation. The goal is to partition each extruded prism into sub-prisms of high quality that fit within the given printed circuit board layers. A prism quality measure is introduced and, from it, optimal prism height is derived given a triangular base. Given a printed circuit board’s layer heights and optimal prism heights, we provide a method for determining the height of each prism element.

The overall prism mesh quality is evaluated, which examines the tradeoff of prism element quality versus the number of elements. The new method also compares favorably with respect to a prior prism mesh generation method that does not involve optimizing prism heights.

 

VisualNet: General Purpose Visualization Tool for Wireless Sensor Networks

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

VisualNet: General Purpose Visualization Tool for

Wireless Sensor Networks

S. Rizvi and K. Ferens

Department of Electrical and Computer Engineering

University of Manitoba

Winnipeg, Manitoba, Canada

Ken.Ferens@ad.umanitoba.ca

Abstract - In a large-scale Wireless Sensor Network, the main goal is to minimize node’s energy consumption and maximize network lifetime. One way to achieve this is to develop energy-efficient routing algorithms. These algorithms are first implemented and tested using network simulators. Mostly, these simulators analyze the network in terms of protocol overhead, throughput, network latency, network lifetime, energy variance, and packet losses, generating log files for each of them. These files are later analyzed for results. However, an in-depth visual analysis is important during network operation to identify network behavior. This paper presents a visualization tool called

“VisualNet” which generates intensity maps for network energy distributions. The software is developed in LabVIEW and was integrated with a Java-based network simulator to generate intensity maps and analyze large network data

 

Effective Visualization Tool for Job Searching

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

Effective Visualization Tool for Job Searching

Yilin Gu† Andries H. Smith†,1 Jong Kwan Lee† Xinyue Ye‡ Soo K. Kim∗

Dept. of Comp. Science ‡ School of Earth, Env. & Society

Bowling Green State Univ.

Bowling Green, OH 43403

{guyil, smithah, leej, xye}@bgsu.edu

Abstract

In this paper, we introduce a web-based visualization tool that provides a new visuospatial and interactive platform for job searching. The tool supports not only the traditional text-based search queries, but also visual search queries based on interaction with geographic space. The job search tool allows users to explore spatial and multivariate information via a web interface that is based on widely-used information APIs.

The effectiveness of the new visualization tool is evaluated by comparing it with other traditional job search tools.

Keywords– Information visualization, geovisualization, job search, web tool.

1

Introduction

When people search for a job, they are actually searching for a place to live. In other words, job searchers not only care about the job itself, but also consider a wide range of the other factors. One could be concerned with the number of similar jobs within that area (which could mean greater opportunities for professional development), or one could wonder about quality of life indices for that area, such as the crime rate or cost of living index. As a parent, one may care about if there are good schools within the area.

 

Development of the Web-Based Structure and Form Analysis System (SAFAS) for Architectural Education

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

87

Development of the Web-Based Structure and Form

Analysis System (SAFAS) for Architectural Education

M. Setareh1, F. Bacim2, N. Polys2, and B. Jones3

School of Architecture and Design, Virginia Tech, Blacksburg, Virginia, USA

2

Department of Computer Science, Virginia Tech, Blacksburg, Virginia, USA

3

School of Education, Virginia Tech, Blacksburg, Virginia, USA

1

Abstract - This paper presents a collaborative effort among the Schools of Architecture and Design, Computer Science, and Education at Virginia Tech, Blacksburg, Virginia, to develop the web-based Structure And Form Analysis System

(SAFAS) for the education of architects. The details of the software architecture, operations, and graphical user interface of SAFAS are discussed.

Keywords: SAFAS, Web-Based Application, Architectural

Structures, Architectural Education, Spatial Structures

1 Introduction

During the past decade there have been a number of attempts to use computers to enhance building design education. The target audiences for these software tools have been architecture, building construction, and engineering students (Messner and Horman [1]; Moloney and Amor [2]; Sulbaran and Crosby [3]; Kalisperis, et. al.

 

Visualization of Mobility-Density Relation in a Modified Percolation Agent-Based Model

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

95

Visualization of Mobility-Density Relation in a

Modified Percolation Agent-Based Model

Bruce Paizen, M.Eng., Jay Kraut, Ph.D., Marcia R. Friesen, Ph.D., and Robert (Bob) D. McLeod,

Department of Electrical and Computer Engineering, University of Manitoba

Abstract-- A modified percolation theory model was developed to incorporate agent mobility on the grid. In this agent-based model (ABM), the impact of agent density was found to significantly influence agent mobility. The visual representation software tool developed provides an intuitive understanding of the ABM simulation dynamics and mechanisms. The software tool visually illustrates that there is a relationship between mobility and density that would have to be taken into account for research into connectedness or connectivity (i.e., epizootic modeling) involving percolation models. Visualization is a common method that is often employed in many percolation models and studies as it helps in narrowing down regions of interest that can be followed up on in a more systematic manner.

 

MARWind: Mobile Augmented Reality Wind Farm Visualization

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Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'13 |

99

MARWind: Mobile Augmented Reality

Wind Farm Visualization

Gerald Dekker1, Qiuhao Zhang1,2, John Moreland1, Chenn Zhou1,3

1

Center for Innovation through Visualization and Simulation

2

Electrical Engineering

3

Mechancial Engineering

Purdue University Calumet

Hammond, IN, USA

Abstract - Wind is increasingly being used as an alternative source of energy across the globe. The placement of wind turbines is often done so as to optimize the amount of energy harvested from the wind. When planning a wind farm, this process is referred to as siting. The siting of wind turbines is both highly visible to the public and can also have direct effects on the efficiency of a wind farm.

A mobile augmented reality application for wind farm siting is being developed as part of a larger project titled

“Mixed Reality Simulators for Wind Energy Education”. The application has many potential benefits both for students, the public, and wind energy professionals. Using global positioning system and compass for registration, users can use mobile devices to view what a proposed wind farm will look like at a given location. Additional functionality will combine wind flow visualization.

 

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