Search for tag: "natural materials"

504 Media

39:23 Ordered and disordered motion in dense active… Ordered and disordered motion in dense active materials - Ludovic Berthier	Ordered and disordered motion in dense active materials - Ludovic Berthier We discuss how the non-equilibrium driving forces introduced by the natural biological activity or by physical self-propulsion mechanisms generically affect the structure, dynamics and phase behavior… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 39 views 0 name Ludovic Berthier Date 04/19/2018
11:33 Local and global avalanches in sheared granular… Local and global avalanches in sheared granular materials - Aghil Abed Zadeh	Local and global avalanches in sheared granular materials - Aghil Abed Zadeh We perform a stick-slip experiment to characterize avalanches for granular materials. In our experiment, a constant speed stage pulls a slider which rests on a vertical bed of circular photoelastic… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 24 views 0 name Aghil Abed Zadeh Date 04/20/2018
40:50 Exploiting disorder - Sid Nagel Exploiting disorder - Sid Nagel	Exploiting disorder - Sid Nagel We are taught to understand solids by considering ideal crystals. This approach becomes untenable as the amount of disorder increases; for a glass with no well-defined long-range order, a crystal is… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 12 views 0 name Sid Nagel Date 04/20/2018
40:42 The Topological Character of Smectics - Randy… The Topological Character of Smectics - Randy Kamien	The Topological Character of Smectics - Randy Kamien Though the systematic use of topology to understand defects in ordered matter is now nearly 50 years old, the original work failed to completely characterize systems with broken translational order,… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 19 views 0 name Randy Kamien Date 04/18/2018
29:08 Symmetry Breaking during the Synthesis of… Symmetry Breaking during the Synthesis of Nanoparticles - Younan Xia	Symmetry Breaking during the Synthesis of Nanoparticles - Younan Xia Symmetry breaking is a ubiquitous phenomenon that occurs spontaneously when a system is subjected to variations in size and/or perturbations in terms of thermodynamic parameters. As a stochastic… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 49 views 0 name Younan Xia Date 04/19/2018
31:22 Fracturing of marginally stable structures: fiber… Fracturing of marginally stable structures: fiber networks and topological metamaterials - Xiaoming Mao	Fracturing of marginally stable structures: fiber networks and topological metamaterials - Xiaoming Mao When conventional brittle materials break, long cracks form due to stress focusing at crack tips: a phenomenon explained by Griffith in the 1920s. In this talk, we will discuss two types of systems… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 23 views 0 name Xiaoming Mao Date 04/19/2018
11:56 Mechanics of Active Networks – Lessons from… Mechanics of Active Networks – Lessons from Fire Ant Aggregations - Shankar Lalitha Sridhar	Mechanics of Active Networks – Lessons from Fire Ant Aggregations - Shankar Lalitha Sridhar Biological assemblies in nature are seen as active matter due to their ability to perform intelligent collective motion based on neighbor interactions and sometimes without any centralized control… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 7 views 0 name Shankar Lalitha Sridhar Date 04/19/2018
09:46 "Cellular packing, mechanical stress and the… "Cellular packing, mechanical stress and the evolution of multicellularity - Shane Jacobeen	"Cellular packing, mechanical stress and the evolution of multicellularity - Shane Jacobeen The evolution of multicellularity set the stage for sustained increases in organismal complexity. However, a fundamental aspect of this transition remains largely unknown: how do simple clusters of… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 8 views 0 name Shane Jacobeen Date 04/19/2018
11:44 Cell contraction induces long-ranged stress… Cell contraction induces long-ranged stress stiffening in the extracellular matrix - Pierre Ronceray	Cell contraction induces long-ranged stress stiffening in the extracellular matrix - Pierre Ronceray Animal cells in tissues are supported by biopolymer matrices, which exhibit highly nonlinear mechanical properties. Here we show that this nonlinearity allows living contractile cells to generate a… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 7 views 0 name Pierre Ronceray Date 04/19/2018
38:19 Some universal features of soft random solids -… Some universal features of soft random solids - Paul Goldbart	Some universal features of soft random solids - Paul Goldbart The aim of this talk is to look at soft random solids through the lens of condensed matter theory, and to explore how their core features -- most notably their random structure and elasticity… science and technology of advanced materials and interfaces (stami)spring 2018 symposium on soft matter forefronts georgia tech college of sciences From Kathryn Gentilello A year ago 13 views 0 name Paul Goldbart Date 04/18/2018
44:58 Quantifying hidden order out of equilibrium -… Quantifying hidden order out of equilibrium - Paul Chaikin	Quantifying hidden order out of equilibrium - Paul Chaikin While the equilibrium properties, states, and phase transitions of interacting systems are well described by statistical mechanics, the lack of suitable state parameters has hindered the… symposium on soft matter forefronts college of sciences spring 2018 georgia tech science and technology of advanced materials and interfaces (stami) From Kathryn Gentilello A year ago 36 views 0 name Paul Chaikin Date 04/20/2018
42:04 Self–assembled DNA liquids: Properties and… Self–assembled DNA liquids: Properties and protein activation - Omar Saleh	Self–assembled DNA liquids: Properties and protein activation - Omar Saleh Biomolecules can self-assemble into liquid phases, termed ‘membraneless organelles’ in the biological context, though also known as ‘coacervates’. I will discuss our efforts… symposium on soft matter forefronts college of sciences spring 2018 georgia tech science and technology of advanced materials and interfaces (stami) From Kathryn Gentilello A year ago 17 views 0 name Omar Saleh Date 04/19/2018
41:56 Topology in Polar Flocking and Active Nematics -… Topology in Polar Flocking and Active Nematics - Mark Bowick	Topology in Polar Flocking and Active Nematics - Mark Bowick Active flocking on curved surfaces, such as the 2-sphere and the catenoid, exhibits dynamical symmetry breaking in the form of spontaneous flow, calculable inhomogeneous density patterns and… spring 2018 science and technology of advanced materials and interfaces (stami)symposium on soft matter forefronts georgia tech college of sciences From Kathryn Gentilello A year ago 21 views 0 name Mark Bowick Date 04/18/2018
10:45 Highly efficient oil-water separation using… Highly efficient oil-water separation using surface-programmable membranes - Minxiang Zeng	Highly efficient oil-water separation using surface-programmable membranes - Minxiang Zeng The challenge of separating emulsified oil from oil/water mixture has sparked enormous research interests in developing advanced membrane technology. One of the most crucial elements to achieve high… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 29 views 0 name Minxiang (Glenn) Zeng, Eric Zhang, Dali Huang, Dr. Zhengdong Cheng Date 04/20/2018
10:33 Why is Structural Hierarchy So Prevalent in… Why is Structural Hierarchy So Prevalent in Biological Materials? - Jonathan Michel	Why is Structural Hierarchy So Prevalent in Biological Materials? - Jonathan Michel Structural hierarchy, in which materials possess distinct features on multiple length scales, is ubiquitous in nature. Many biological materials, such as bone, cellulose, and muscle, have as many as… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 30 views 0 name Jonathan Michel Date 04/19/2018
42:09 Geometric underpinnings of auxetic behavior -… Geometric underpinnings of auxetic behavior - Ileana Streinu	Geometric underpinnings of auxetic behavior - Ileana Streinu In materials science, auxetic behavior is characterized by negative Poisson's ratios. We have recently developed a purely geometric theory of auxetic behavior for periodic framework materials.… symposium on soft matter forefronts science and technology of advanced materials and interfaces (stami)college of sciences georgia tech spring 2018 From Kathryn Gentilello A year ago 24 views 0 name Ileana Streinu Date 04/18/2018