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October 2019

Elisabetta Matsumoto, Georgia Institute of Technology – Applied Mathematics Colloquium

October 11, 2019 @ 4:00 pm - 5:00 pm

Title: Twisted Topological Tangles or: the knot theory of knitting Abstract:  Imagine a 1D curve, then use it to fill a 2D manifold that covers an arbitrary 3D object – this computationally intensive materials challenge has been realized in the ancient technology known as knitting. This process for making functional materials 2D materials from 1D portable cloth dates back to prehistory, with the oldest known examples dating from the 11th century BCE. Knitted textiles are ubiquitous as they are easy and…

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Gwynn Elfring, Department of Mechanical Engineering, University of British Columbia (Canada) – Applied Mathematics Colloquium

October 25, 2019 @ 4:00 pm - 5:00 pm

Title: Active particles in complex fluids Abstract: Active particles are self-driven objects, biological or otherwise, which convert stored or ambient energy into systematic motion. The motion of small active particles in Newtonian fluids has received considerable attention, with interest ranging from phoretic propulsion to biological locomotion, whereas studies on active bodies immersed in complex fluids are comparatively scarce. In this talk I will discuss a theoretical formalism for understanding the motion of active particles in complex fluids and then discuss the effects of viscosity gradients, viscoelasticity and shear-thinning rheology in…

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November 2019

Pierre-Yves Passaggia, Department of Mechanical and Aerospace Engineering, University of Orléans (France) and Department of Mathematics, UNC-Chapel Hill – Applied Mathematics Colloquium

November 1, 2019 @ 4:00 pm - 5:00 pm

Title: Abstract:

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Kelli Hendrickson, Vortical Flow Research Lab, MIT – Applied Mathematics Colloquium

November 4, 2019 @ 4:00 pm - 5:00 pm

Title: Bubbles, wakes, and pipes Abstract: Ever go to the ocean and watch the waves break on the shore? Or, view the wake as it forms behind a boat? These everyday activities involve violent free-surface flows with large void fractions, large density ratios, and high Reynolds numbers. They present scientific and technical challenges to solve and understand. I will describe our recent efforts towards answering questions such as: "Can we predict the location, amount and size distribution of entrained bubbles in…

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Shahar Kovalsky, Department of Mathematics, Duke University – Applied Mathematics Colloquium

November 8, 2019 @ 4:00 pm - 5:00 pm

Title: Planar surface embeddings and non-convex harmonic maps Abstract: Mappings between domains are among the most basic and versatile tools used in the computational analysis and manipulation of shapes. Their applications range from animation in computer graphics to analysis of anatomical variation and anomaly detection in medicine and biology. My talk will start with a brief overview of discrete computational shape mapping, surface parameterization (flattening), and their applications. I will then discuss invertibility, an often desirable property of mappings, and present an optimization approach…

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Brent Craven, Center for Devices and Radiological Health, U.S. Food and Drug Administration – Applied Mathematics Colloquium

November 15, 2019 @ 4:00 pm - 5:00 pm

Title: Toward the Use of Computer Modeling and Simulation to Initiate a Medical Device Clinical Trial Abstract: Computer modeling is frequently used as a complement to bench-top experiments in medical device submissions to the U.S. Food and Drug Administration (FDA), but is rarely used as a primary source of evidence. Modeling and simulation (M&S) are expected to play a growing role in future medical device submissions with continued advances in computational capabilities and wider adoption by industry. This has the…

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Manuchehr Aminian, Department of Mathematics, Colorado State University – Applied Mathematics Colloquium

November 22, 2019 @ 4:00 pm - 5:00 pm

Title: Using mathematical tools to understand the immune system Abstract: How soon after exposure can we identify that you're infected with the flu? Can this be done prior to the onset of symptoms? Why do some animals tolerate bacterial infections better than others? It turns out we have been able to provide some answers to these questions in the positive! First I will discuss the ongoing experiments and studies of our collaborators which ultimately aim to answer these questions. Then I will…

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February 2020

Sarah Olson, Department of Mathematical Sciences, Worcester Polytechnic Institute – Applied Mathematics Colloquium

February 21, 2020 @ 4:00 pm - 5:00 pm

Title: Dynamics of movement in complex environments Abstract: In this talk, we will highlight two different types of movement in viscosity dominated environments: sperm navigation and centrosome clustering in dividing cells.  Sperm often interact with chemicals and other proteins in the fluid, changing force generation and emergent swimming trajectories. Recently developed computational methods and asymptotic analysis allow for insight into swimming efficiency and hydrodynamic interactions of swimmers in different fluid environments. We will also show how parameter estimation techniques can…

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October 2020

Applied Mathematics Colloquium – Dr. Natalie Stanley, Stanford University

October 16, 2020 @ 4:00 pm - 5:00 pm

Dr. Natalie Stanley, Postdoctoral Fellow in Aghaeepour Lab Stanford University https://nalab.stanford.edu/team/natalie-stanley/ Title: Leveraging Cellular Heterogeneity for Predictive Modeling of Single-Cell Data Abstract: Advancements in single-cell technologies enable the profiling of gene and protein expression at a single-cell level. These technologies are being increasingly applied in clinical settings, and often result in measurements from millions of cells within a patient cohort. In this talk, I will describe `VoPo`, an algorithm that we recently developed (https://www.nature.com/articles/s41467-020-17569-8) for automated cell-population discovery, feature engineering, comprehensive visualization, and…

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Applied Mathematics Colloquium – Zeliha Kilic, Department of Physics, Arizona State University

October 23, 2020 @ 4:00 pm - 5:00 pm

Dr. Zeliha Kilic, Postdoctoral Research Associate in Pressé Lab Department of Physics, Arizona State University http://zkilic.wixsite.com/zelihakilic  Talk taking place over Zoom. Title: BAYESIAN APPROACHES to DATA INTERPRETATION IN APPLIED PHYSICAL SCIENCES Abstract: Fluorescence experiments based on Förster resonance energy transfer (FRET) present a powerful way to probe switching kinetics between the conformational states of  a molecule. The acquired data from these experiments generated by a single molecule are traditionally interpreted with hidden Markov models (HMMs). The underlying modeling assumptions for HMM…

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