
Hub Snub: Removing Vertices with High Degree from Coarsegrid Correction
04 Feb 2016   Contributor(s):: Geoffry Sanders
Network scientists often employ numerical solutions to linear systems as subroutines of data mining algorithms. Due to the illconditioned nature of the systems, obtaining solutions with standard iterative methods is often prohibitively costly; current research aims to automatically construct...

On the Preconditioning of a HighOrder RDGbased AllSpeed NavierStokes Solver
04 Feb 2016   Contributor(s):: Brian Weston
We investigate the preconditioning of an allspeed NavierStokes solver, based on the orthogonalbasis Reconstructed Discontinuous Galerkin (RDG) space discretization, and integrated using a highorder fullyimplicit time discretization method. The work is motivated by applications in Additive...

Is the Ideal Approximation Operator Always "Ideal" for a Particular C/F Splitting?
04 Feb 2016   Contributor(s):: Erin Molloy
Given a coarse grid, the ideal prolongation operator is defined by , where the weight matrix, , interpolates a set of fine grid variable (points) from a set of coarse grid variable (points), and the identity matrix, , represents the injection of points to and from...

Reducing Communication Costs for Sparse Matrix Multiplication within Algebraic Multigrid
04 Feb 2016   Contributor(s):: Grey Ballard
We consider the sequence of sparse matrixmatrix multiplications performed during the setup phase of algebraic multigrid. In particular, we show that the most commonly used parallel algorithm is often not the most communicationefficient one for all of the matrix multiplications involved. By...

Spacetime constrained FOSLS with AMGe upscaling
04 Feb 2016   Contributor(s):: Panayot Vassilevski
We consider timedependent PDEs discretized in combined spacetime domains. We first reduce the PDE to a first order system. Very often in practice, one of the equations of the reduced system involves the divergence operator (in spacetime). The popular FOSLS (first order system leastsquares)...

Multilevel Markov Chain Monte Carlo for Uncertainty Quantification in Subsurface Flow
04 Feb 2016   Contributor(s):: Christian Ketelsen
The multilevel Monte Carlo method has been shown to be an effective variance reduction technique for quantifying uncertainty in subsurface flow simulations when the random conductivity field can be represented by a simple prior distribution. In stateoftheart subsurface simulation the...

Discretization of Elliptic Differential Equations Using Sparse Grids and Prewavelets
04 Feb 2016   Contributor(s):: Christoph Pflaum
Sparse grids can be used to discretize second order elliptic differential equations on a ddimensional cube. Using Galerkin discretization, we obtain a linear equation system with unknowns. The corresponding discretization error is in the norm. A major difficulty in...

High Dimensional Uncertainty Quantification via Multilevel Monte Carlo
04 Feb 2016   Contributor(s):: Hillary Fairbanks
Multilevel Monte Carlo (MLMC) has been shown to be a cost effective way to compute moments of desired quantities of interest in stochastic partial differential equations when the uncertainty in the data is highdimensional. In this talk, we investigate the improved performance of MLMC versus...

Stable Discretizations and Robust Block Preconditioners for FluidStructure Interaction Systems
04 Feb 2016   Contributor(s):: Kai Yang
In our work we develop a family of preconditioners for the linear algebraic systems arising from the arbitrary LagrangianEulerian discretization of some fluidstructure interaction models. After the time discretization, we formulate the fluidstructure interaction equations as saddle point...

[Illinois] Nanotechnology meets Biology in the Cancer Cell: Applications in Medicine, Drug Delivery, and Determining Drug Efficacy
04 Feb 2016   Contributor(s):: Mostafa ElSayed

[Illinois] Rare Events with LargeImpact: Bioengineering & Clinical Applications of Circulating Tumor Cells
04 Feb 2016   Contributor(s):: Mehmet Toner

[Illinois] CNST Nanotechnology Workshop 2015
04 Feb 2016   Contributor(s):: Mustafa Elsayed, Mehmet Toner
The CNST Nanotechnology Workshop highlights University of Illinois research in bionanotechnology and nanomedicine, nanoelectronics and nanophotonics, and nanomaterials and nanomanufacturing, leading to crosscampus and industry collaborations.

[Illinois] Signal Processing at Light Speed: Ultrashort Optical Pulse Generation with Arbitrary Waveforms
29 Jan 2016   Contributor(s):: Claire Mcghee
We aim to further improve early detection of cancer biomarkers, including metal ion and small molecules, using functional DNA as the selective component for photonic crystal surface enhanced Raman scattering (PCSERS) based detection. It is known that gold nanoparticles (AuNPs) display SERS...

[Illinois] Using Photonic Crystals to Enhance SERS Signals for Early Detection of Prostate Cancer
29 Jan 2016   Contributor(s):: Caitlin Race
Prostate cancer is the second most common cancer for men, and the second leading cause of death due to cancer in men. Currently, the most common screening method aims to detect high levels of prostatespecific antigen (PSA) in blood. Our research has shown the potential for both better prostate...

[Illinois] Manipulating Substrate Topography for Enhanced Myogenic Differentiation of Primary Myoblasts and Neuromuscular Junction Formation
29 Jan 2016   Contributor(s):: Eunkyung Ko
Myogenic commitment of stem cells and primary myoblasts has drawn attention for developing treatments for skeletal muscle diseases. Biophysical cues as well as biochemical cues are known to influence the cellular mechanism of the myogenic differentiation event. Recent studies have revealed that...

[Illinois] CadherinModulated Neural Differentiation of Stem Cells for Neuromuscular Junction Engineering
29 Jan 2016   Contributor(s):: Ellen Qin
Recently, efforts are increasingly made to engineer NMJ in vitro for both fundamental and applied bioscience studies. Certain success was made to modulate neural differentiation of stem cells using soluble factors and cell adhesion matrix properties. However, these studies were often plagued by...

[Illinois] Role for Stiffness in Vascular Fate
29 Jan 2016   Contributor(s):: Lian Wong
Stem cells, including embryonic stem cells (ESC) and induced pluripotent stem cells, have been explored as tools for studying development, as well as, potential sources for a large number of therapies in regenerative medicine. Traditionally, ESC are cultured on TCplastic, however; it has been...

[Illinois] Bionanotechnology Seminar Series
29 Jan 2016   Contributor(s)::
This series is organized by PhD students who are appointed as Trainees in the NIH/NCI Midwest Cancer Nanotechnology Training Center (MCNTC) and in the NSF IGERT in Cellular and Molecular Mechanics and BioNanotechnology (CMMB IGERT). These traineeships are designed to train the next generation...

[Illinois] Synthetic Optical Holography
26 Jan 2016   Contributor(s):: Brad Deutsch

[Illinois] Dimeric Trigger Responsive Drug Conjugate for High Loading Nanoencapsulates
26 Jan 2016   Contributor(s):: kaimin Cai
Polymeric micelle is one of the most widely used drug delivery nanomedicine platforms; however, micelle drug delivery systems usually have very low drug loading and poorly defined composition, which greatly limited its further clinical translation. In the course of developing trigger responsive...