From aaulia@sciences.sdsu.edu Mon Mar 3 05:16:31 2008 From: aaulia@sciences.sdsu.edu (aaulia@sciences.sdsu.edu) Date: Mon, 3 Mar 2008 00:16:31 -0500 Subject: [CSRC SDSU] COLLOQUIUM: MAGNETIC RESONANCE (MR) IMAGING AND IMAGING INFORMATICS: FROM DATA TO KNOWLEDGE Message-ID: <380-2200831351631699@M2W023.mail2web.com> Title: MAGNETIC RESONANCE (MR) IMAGING AND IMAGING INFORMATICS: FROM DATA TO KNOWLEDGE Date: Friday, March 7th 2008 Time: 3:30 pm Location: GMCS 214 Speaker: Usha Sinha Chair, Department of Physics San Diego State University Abstract: The presentation covers the range from MR image acquisition through image processing to imaging informatics. MR image acquisition focuses on imaging pulse sequence development for specific clinical applications. Areas of clinical application include cardiac, brain, breast, prostate, and musculo-skeletal anatomical regions. Imaging informatics addresses the problems related to large volumes of imaging studies. The challenges in this area include standardizing imaging data, developing techniques for automated assessment of population based differences in imaging studies, as well as creating effective data models to represent information extracted from images. The presentation will include some of these aspects and our approach to address these challenges. Host: Jose E. Castillo For future events, please visit our web site at: http://www.csrc.sdsu.edu/csrc/events/colloquium/ ******************************************* Akmal Aulia PhD Student Computational Science Research Center San Diego State University Phone: 619-335-7187 Email: aaulia@sciences.sdsu.edu -------------------------------------------------------------------- mail2web.com - Microsoft® Exchange solutions from a leading provider - http://link.mail2web.com/Business/Exchange From aaulia@sciences.sdsu.edu Wed Mar 5 19:22:21 2008 From: aaulia@sciences.sdsu.edu (aaulia@sciences.sdsu.edu) Date: Wed, 5 Mar 2008 14:22:21 -0500 Subject: [CSRC SDSU] *Reminder* COLLOQUIUM: MAGNETIC RESONANCE (MR) IMAGING AND IMAGING INFORMATICS: FROM DATA TO KNOWLEDGE Message-ID: <380-22008335192221939@M2W013.mail2web.com> Title: MAGNETIC RESONANCE (MR) IMAGING AND IMAGING INFORMATICS: FROM DATA TO KNOWLEDGE Date: Friday, March 7th 2008 Time: 3:30 pm Location: GMCS 214 Speaker: Usha Sinha Chair, Department of Physics San Diego State University Abstract: The presentation covers the range from MR image acquisition through image processing to imaging informatics. MR image acquisition focuses on imaging pulse sequence development for specific clinical applications. Areas of clinical application include cardiac, brain, breast, prostate, and musculo-skeletal anatomical regions. Imaging informatics addresses the problems related to large volumes of imaging studies. The challenges in this area include standardizing imaging data, developing techniques for automated assessment of population based differences in imaging studies, as well as creating effective data models to represent information extracted from images. The presentation will include some of these aspects and our approach to address these challenges. Host: Jose E. Castillo For future events, please visit our web site at: http://www.csrc.sdsu.edu/csrc/events/colloquium/ ******************************************* Akmal Aulia PhD Student Computational Science Research Center San Diego State University Phone: 619-335-7187 Email: aaulia@sciences.sdsu.edu -------------------------------------------------------------------- mail2web.com – Enhanced email for the mobile individual based on Microsoft® Exchange - http://link.mail2web.com/Personal/EnhancedEmail From aaulia@sciences.sdsu.edu Mon Mar 10 18:23:51 2008 From: aaulia@sciences.sdsu.edu (aaulia@sciences.sdsu.edu) Date: Mon, 10 Mar 2008 13:23:51 -0400 Subject: [CSRC SDSU] COLLOQUIUM: TOPOLOGY OPTIMIZATION OF SHAPE MEMORY ALLOY ACTUATORS, INSECT INSPIRED FLYING ROBOTS Message-ID: <380-220083110172351546@M2W025.mail2web.com> *This upcoming talk will be divided into two sessions* TITLE Title, 1st session: TOPOLOGY OPTIMIZATION OF SHAPE MEMORY ALLOY ACTUATORS Title, 2nd session: INSECT INSPIRED FLYING ROBOTS Date: Friday, March 14th, 2008 Time: 3:30 pm Location: GMCS 214 SPEAKER Speaker, 1st session: Fred van Keulen (work in collaboration with Matthijs Langelaar) Professor, Structural Optimization and Computational Mechanics Group Department of Precision and Microsystems Engineering Technical University of Delft, Netherlands Speaker, 2nd session: Caspar Bolsman PhD Student, Structural Optimization and Computational Mechanics Group Department of Precision and Microsystems Engineering Technical University of Delft, Netherlands ABSTRACT Abstract, 1st session: Shape memory alloys (SMA's) are recognized as excellent materials for many miniature actuation tasks. However, the complexity of the material behavior complicates the design of such SMA actuators. Particularly the design of two- or three-dimensional actuators is challenging. To resolve this problem, systematic design optimization techniques for SMA structures have been investigated. In this presentation, results of topology optimization of SMA actuators will be presented. In the considered SMA actuator design problem, application of conventional density-based topology optimization techniques proves to be difficult. An alternative approach is used to deal with this problem, based on the so-called Element Connectivity Parameterization (ECP) approach. The problem formulation based on this ECP formulation will be discussed, and the effectiveness of the developed procedure will be illustrated by several examples. Abstract, 2nd session: At the smaller scales, flapping flight is more energy efficient as compared to the flight of helicopters. Insects provide an excellent source of inspiration for the development of flying micro robots. This is obvious for the wing movement and aerodynamics. But from a mechanical point of view, the resonant properties of the insect’s thorax are more interesting. These properties help to reduce the energy expended in accelerating and decelerating the wings and, equally important, provide means of amplitude amplification. In order to realize an insect scale flying robot, the designer has to find an engineering alternative for the insect thorax. This mechanism should provide the correct wing kinematics for efficient lift production and well as provide options for control of the aerodynamic forces. This presentation gives an introduction to the insect flight mechanism and an engineering alternative based on ring-type structures. Host: Satchi Venkataraman For future events, please visit our web site at: http://www.csrc.sdsu.edu/csrc/events/colloquium/ ******************************************* Akmal Aulia PhD Student Computational Science Research Center San Diego State University Phone: 619-335-7187 Email: aaulia@sciences.sdsu.edu -------------------------------------------------------------------- mail2web.com – What can On Demand Business Solutions do for you? http://link.mail2web.com/Business/SharePoint From aaulia@sciences.sdsu.edu Wed Mar 12 17:25:24 2008 From: aaulia@sciences.sdsu.edu (aaulia@sciences.sdsu.edu) Date: Wed, 12 Mar 2008 12:25:24 -0400 Subject: [CSRC SDSU] *Reminder* COLLOQUIUM: TOPOLOGY OPTIMIZATION OF SHAPE MEMORY ALLOY ACTUATORS, INSECT INSPIRED FLYING ROBOTS Message-ID: <380-220083312162524623@M2W026.mail2web.com> *This upcoming talk will be divided into two sessions* TITLE Title, 1st session: TOPOLOGY OPTIMIZATION OF SHAPE MEMORY ALLOY ACTUATORS Title, 2nd session: INSECT INSPIRED FLYING ROBOTS Date: Friday, March 14th, 2008 Time: 3:30 pm Location: GMCS 214 SPEAKER Speaker, 1st session: Fred van Keulen (work in collaboration with Matthijs Langelaar) Professor, Structural Optimization and Computational Mechanics Group Department of Precision and Microsystems Engineering Technical University of Delft, Netherlands Speaker, 2nd session: Caspar Bolsman PhD Student, Structural Optimization and Computational Mechanics Group Department of Precision and Microsystems Engineering Technical University of Delft, Netherlands ABSTRACT Abstract, 1st session: Shape memory alloys (SMA's) are recognized as excellent materials for many miniature actuation tasks. However, the complexity of the material behavior complicates the design of such SMA actuators. Particularly the design of two- or three-dimensional actuators is challenging. To resolve this problem, systematic design optimization techniques for SMA structures have been investigated. In this presentation, results of topology optimization of SMA actuators will be presented. In the considered SMA actuator design problem, application of conventional density-based topology optimization techniques proves to be difficult. An alternative approach is used to deal with this problem, based on the so-called Element Connectivity Parameterization (ECP) approach. The problem formulation based on this ECP formulation will be discussed, and the effectiveness of the developed procedure will be illustrated by several examples. Abstract, 2nd session: At the smaller scales, flapping flight is more energy efficient as compared to the flight of helicopters. Insects provide an excellent source of inspiration for the development of flying micro robots. This is obvious for the wing movement and aerodynamics. But from a mechanical point of view, the resonant properties of the insect’s thorax are more interesting. These properties help to reduce the energy expended in accelerating and decelerating the wings and, equally important, provide means of amplitude amplification. In order to realize an insect scale flying robot, the designer has to find an engineering alternative for the insect thorax. This mechanism should provide the correct wing kinematics for efficient lift production and well as provide options for control of the aerodynamic forces. This presentation gives an introduction to the insect flight mechanism and an engineering alternative based on ring-type structures. Host: Satchi Venkataraman For future events, please visit our web site at: http://www.csrc.sdsu.edu/csrc/events/colloquium/ ******************************************* Akmal Aulia PhD Student Computational Science Research Center San Diego State University Phone: 619-335-7187 Email: aaulia@sciences.sdsu.edu -------------------------------------------------------------------- mail2web.com – What can On Demand Business Solutions do for you? http://link.mail2web.com/Business/SharePoint From aaulia@sciences.sdsu.edu Fri Mar 14 23:54:26 2008 From: aaulia@sciences.sdsu.edu (aaulia@sciences.sdsu.edu) Date: Fri, 14 Mar 2008 18:54:26 -0400 Subject: [CSRC SDSU] COLLOQUIUM: ADVANCE HYBRID HIGH ORDER METHODS FOR MULTI-SCALES PROBLEMS IN SHOCKED FLOWS Message-ID: <380-220083514225426444@M2W032.mail2web.com> Title: ADVANCE HYBRID HIGH ORDER METHODS FOR MULTI-SCALES PROBLEMS IN SHOCKED FLOWS Date: Friday, March 21st, 2008 Time: 3:30 pm Location: GMCS 214 Speaker: Wai Sun Don Visiting Professor, Division of Applied Mathematics Brown University Abstract: Classical high order methods such as spectral methods and classical WENO methods are reaching their limits in handling shocked flows with both large and small scales structures, such as the classical Richtmyer-Meshkov instability and shock-particle laden flow, in an efficient and accurate manner due to some of their inherent weakness. Spectral methods, though highly efficient and accuracy for smooth problems, suffer the Gibbs oscillations when discontinuities formed in the solution in a nonlinear hyperbolic conservation laws. High order WENO methods, on the other hand, are capable of capturing shocks in an essentially non-oscillatory manner due to its non-linear adaptive stencils switching and lowering of the order at the non-smooth stencils. However, the reconstruction procedure is an expensive undertaking and quite dissipative in nature. In this talk, I will present the work on the hybridization of these two methodologically different methods in a spatially and temporary adaptive multi-domain framework yielding a scheme which can capture shock and resolving smooth small scales structures in an efficient manner. The adaptively is based on the high order multi-resolution analysis. Examples of the standard Riemann IVP problems, Mach 3 shock-density wave interaction and two dimensional Shock-vortex interaction and Richtmyer-Meshkov instability at high Mach numbers will be shown. Host: Gustaaf (Guus) Jacobs For future events, please visit our web site at: http://www.csrc.sdsu.edu/csrc/events/colloquium/ ******************************************* Akmal Aulia PhD Student Computational Science Research Center San Diego State University Phone: 619-335-7187 Email: aaulia@sciences.sdsu.edu -------------------------------------------------------------------- mail2web LIVE – Free email based on Microsoft® Exchange technology - http://link.mail2web.com/LIVE From aaulia@sciences.sdsu.edu Wed Mar 19 22:29:06 2008 From: aaulia@sciences.sdsu.edu (aaulia@sciences.sdsu.edu) Date: Wed, 19 Mar 2008 17:29:06 -0400 Subject: [CSRC SDSU] *Reminder* COLLOQUIUM: ADVANCED HYBRID HIGH ORDER METHODS FOR MULTI-SCALES PROBLEMS IN SHOCKED FLOWS Message-ID: <380-22008331921296674@M2W031.mail2web.com> Title: ADVANCED HYBRID HIGH ORDER METHODS FOR MULTI-SCALES PROBLEMS IN SHOCKED FLOWS Date: Friday, March 21st, 2008 Time: 3:30 pm Location: GMCS 214 Speaker: Wai Sun Don Visiting Professor, Division of Applied Mathematics Brown University Abstract: Classical high order methods such as spectral methods and classical WENO methods are reaching their limits in handling shocked flows with both large and small scales structures, such as the classical Richtmyer-Meshkov instability and shock-particle laden flow, in an efficient and accurate manner due to some of their inherent weakness. Spectral methods, though highly efficient and accuracy for smooth problems, suffer the Gibbs oscillations when discontinuities formed in the solution in a nonlinear hyperbolic conservation laws. High order WENO methods, on the other hand, are capable of capturing shocks in an essentially non-oscillatory manner due to its non-linear adaptive stencils switching and lowering of the order at the non-smooth stencils. However, the reconstruction procedure is an expensive undertaking and quite dissipative in nature. In this talk, I will present the work on the hybridization of these two methodologically different methods in a spatially and temporally adaptive multi-domain framework yielding a scheme which can capture shock and resolving smooth small scales structures in an efficient manner. The adaptively is based on the high order multi-resolution analysis. Examples of the standard Riemann IVP problems, Mach 3 shock-density wave interaction and two dimensional Shock-vortex interaction and Richtmyer-Meshkov instability at high Mach numbers will be shown. Host: Gustaaf (Guus) Jacobs For future events, please visit our web site at: http://www.csrc.sdsu.edu/csrc/events/colloquium/ ******************************************* Akmal Aulia PhD Student Computational Science Research Center San Diego State University Phone: 619-335-7187 Email: aaulia@sciences.sdsu.edu -------------------------------------------------------------------- mail2web.com - Microsoft® Exchange solutions from a leading provider - http://link.mail2web.com/Business/Exchange From aaulia@sciences.sdsu.edu Fri Mar 21 23:53:03 2008 From: aaulia@sciences.sdsu.edu (aaulia@sciences.sdsu.edu) Date: Fri, 21 Mar 2008 18:53:03 -0400 Subject: [CSRC SDSU] COLLOQUIUM: METHODS FOR RIGID-BODY AND FLEXIBLE FITTING IN 3-D ELECTRON-MICROSCOPY IMAGES Message-ID: <380-22008352122533292@M2W027.mail2web.com> Title: METHODS FOR RIGID-BODY AND FLEXIBLE FITTING IN 3-D ELECTRON-MICROSCOPY IMAGES Date: Friday, March 28th,2008 Time: 3:30 pm Location: GMCS 214 Speaker: Julio Kovacs Abagyan Laboratory The Scripps Research Institute Abstract: I will describe methods developed in our lab to perform the fitting of given atomic structures of protein molecules into 3-D images obtained by electron microscopy. These images, also called maps, are of limited resolution and thus individual atoms are not visible. Therefore researchers resort to fitting techniques in an attempt to test hypotheses regarding the conformation and arrangement of the molecules within the observed maps. These techniques fall into one of two types: rigid-body or flexible fitting. I will discuss one technique of each type and show examples of applications. The rigid-body fitting method is general and so can be applied in other areas; in contrast, the flexible-fitting one is more specific to the geometry and degrees of freedom of protein molecules. Host: Antonio Palacios For future events, please visit our web site at: http://www.csrc.sdsu.edu/csrc/events/colloquium/ http://ibdws.sdsu.edu/csrc (temporary) ******************************************* Akmal Aulia PhD Student Computational Science Research Center San Diego State University Phone: 619-335-7187 Email: aaulia@sciences.sdsu.edu -------------------------------------------------------------------- mail2web LIVE – Free email based on Microsoft® Exchange technology - http://link.mail2web.com/LIVE From aaulia@sciences.sdsu.edu Wed Mar 26 21:26:14 2008 From: aaulia@sciences.sdsu.edu (aaulia@sciences.sdsu.edu) Date: Wed, 26 Mar 2008 16:26:14 -0400 Subject: [CSRC SDSU] *Reminder* COLLOQUIUM: METHODS FOR RIGID-BODY AND FLEXIBLE FITTING IN 3-D ELECTRON-MICROSCOPY IMAGES Message-ID: <380-220083326202614898@M2W015.mail2web.com> Title: METHODS FOR RIGID-BODY AND FLEXIBLE FITTING IN 3-D ELECTRON-MICROSCOPY IMAGES Date: Friday, March 28th,2008 Time: 3:30 pm Location: GMCS 214 Speaker: Julio Kovacs Abagyan Laboratory The Scripps Research Institute Abstract: I will describe methods developed in our lab to perform the fitting of given atomic structures of protein molecules into 3-D images obtained by electron microscopy. These images, also called maps, are of limited resolution and thus individual atoms are not visible. Therefore researchers resort to fitting techniques in an attempt to test hypotheses regarding the conformation and arrangement of the molecules within the observed maps. These techniques fall into one of two types: rigid-body or flexible fitting. I will discuss one technique of each type and show examples of applications. The rigid-body fitting method is general and so can be applied in other areas; in contrast, the flexible-fitting one is more specific to the geometry and degrees of freedom of protein molecules. Host: Antonio Palacios For future events, please visit our web site at: http://www.csrc.sdsu.edu/csrc/events/colloquium/ http://ibdws.sdsu.edu/csrc (temporary) ******************************************* Akmal Aulia PhD Student Computational Science Research Center San Diego State University Phone: 619-335-7187 Email: aaulia@sciences.sdsu.edu -------------------------------------------------------------------- mail2web.com – Enhanced email for the mobile individual based on Microsoft® Exchange - http://link.mail2web.com/Personal/EnhancedEmail From aaulia@sciences.sdsu.edu Fri Mar 28 23:47:29 2008 From: aaulia@sciences.sdsu.edu (aaulia@sciences.sdsu.edu) Date: Fri, 28 Mar 2008 18:47:29 -0400 Subject: [CSRC SDSU] COLLOQUIUM: FORMULATION OF A TARGET-MATRIX PARADIGM FOR MESH OPTIMIZATION Message-ID: <380-220083528224729639@M2W025.mail2web.com> Title: FORMULATION OF A TARGET-MATRIX PARADIGM FOR MESH OPTIMIZATION Date: Friday, April 4th, 2008 Time: 3:30 pm Location: GMCS 214 Speaker: Patrick M. Knupp Optimization and Uncertainty Estimation Dept. Sandia National Laboratories Abstract: PDE simulations generally require a mesh on which the physical domain is discretized. The mesh can have a strong impact on solution accuracy & efficiency if not constructed properly. Methods to address this issue include solution-adaptive meshes, smoothing & swapping, and mesh optimization. An extension of Direct optimization (Castillo & others) will be described in this talk. A Target-Matrix paradigm (TMP) for improving mesh quality by node repositioning via optimization is formulated in which target matrices describe the desired Jacobian matrix at mesh sample points. Attention is devoted to basic definitions & properties of mesh-based matrices, local & non-local quality metrics, and objective functions based on the power-mean. New local metrics are proposed that satisfy seven important requirements for a properly formulated mesh quality metric. Numerical experiments illustrate the theoretical properties and indicate the potential of this paradigm. Host: Jose Castillo For future events, please visit our web site at: http://www.csrc.sdsu.edu/csrc/events/colloquium/ ******************************************* Akmal Aulia PhD Student Computational Science Research Center San Diego State University Phone: 619-335-7187 Email: aaulia@sciences.sdsu.edu -------------------------------------------------------------------- mail2web.com - Microsoft® Exchange solutions from a leading provider - http://link.mail2web.com/Business/Exchange