Author: Kevin Dwayne

Accurate dissipative forces in optimization integrators

George E. Brown, Matthew Overby, Zahra Forootaninia, Rahul Narain We propose a method for accurately simulating dissipative forces in deformable bodies when using optimization-based integrators. We represent such forces using dissipation functions which may be nonlinear in both positions and velocities, enabling us to model a range of dissipative effects including Coulomb friction, Rayleigh damping, […]

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The World Cup from a Quantum Perspective

Two weeks into the Football World Cup and the group stages are over: 16 teams have gone home, leaving the top 16 teams to contend the knock-out stages. Those fans who enjoy a bet will be poring over the odds in search of a bargain—a mis-calculation on the part of the bookmakers. Is now the […]

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Supermassive Black Hole Could Swallow Earth, Astronomer Warns

An Italian astronomer explains that a supermassive black hole have masses millions or billions times greater than that of our host star, and have grown to vast magnitude by engulfing matter and merging with other black holes. In a recent TED-Ed video, called “Could the Earth be swallowed by a black hole?” Fabio Pacucci, a Yale […]

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The Fantastic Falling Felines and Fundamental Physics Photo Fundraiser

As you may have heard, I’ve been working on a book on the history and physics of cats landing on their feet, titled “Falling Felines and Fundamental Physics.” The book will be published in early 2019, hopefully, and I’m really excited to share it with you!  However, my publisher is a non-profit academic publisher and […]

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Decoupling Simulation Accuracy from Mesh Quality

Teseo Schneider, Yixin Hu, Jeremie Dumas, Xifeng Gao, Daniele Panozzo, Denis Zorin For a given PDE problem, three main factors affect the accuracy of FEM solutions: basis order, mesh resolution, and mesh element quality. The first two factors are easy to control, while controlling element shape quality is a challenge, with fundamental limitations on what […]

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A NASA Spacecraft Just Found Evidence of Water on a Distant Asteroid

A spacecraft sent by NASA is currently moving with 12 miles above the surface of a small asteroid millions of miles away from Earth. Its job is to closely exame its surface. The Spacecraft just delivered its first data batch. As part of NASA’s Origins Program, the OSIRIS-REx spacecraft went close to an asteroid called Bennu. Bennu is about 100 million miles (160 million kilometers) away from […]

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I-Cloth: Incremental Collision Handling for GPU-Based Interactive Cloth Simulation

Min Tang, Tongtong Wang, Zhongyuan Liu, Ruofeng Tong, and Dinesh Manocha We present an incremental collision handling algorithm for GPU-based interactive cloth simulation. Our approach exploits the spatial and temporal coherence between successive iterations of an optimization-based solver for collision response computation. We present an incremental continuous collision detection algorithm that keeps track of deforming […]

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Falling Felines Photo Fundraiser update!

Just a quick update here, for those who haven’t been following my GoFundMe page: I’ve made great progress in raising the funds for the photo rights so far — with over 2/3rd covered!  I’ve been quite obsessed with getting the book draft finished and the photographs acquired, so my energy has been focused away from […]

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Analytic Eigensystems for Isotropic Distortion Energies

Breannan Smith, Fernando de Goes, Theodore Kim Many strategies exist for optimizing non-linear distortion energies in geometry and physics applications, but devising an approach that achieves the convergence promised by Newton-type methods remains challenging. In order to guarantee the positive semi-definiteness required by these methods, a numerical eigendecomposition or approximate regularization is usually needed. In […]

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The Curious Behavior of Topological Insulators

IQIM hosts a Summer Research Institute that invites high school Physics teachers to work directly with staff, students, and researchers in the lab.  Last summer I worked with Marcus Teague, a highly intelligent and very patient Caltech Staff Scientist in the Yeh Group, to help set up an experiment for studying exotic material samples under […]

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