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MEAM Seminar: “Scalable Algorithms for the Computational Modeling of Complex Multi-Physics Systems”

The computational modeling of complex multi-physics problems often requires specialized approaches in the formulation, implementation, and deployment of algorithms that lie outside the scope of conventional practice in physics-based modeling and simulation. In this talk I will present three examples of problems in which the synergistic combination of advanced algorithms, and state-of-the-art software implementations on […]

MEAM Seminar: “Multiscale Interactions in Multiphase Turbulent Flows: Fundamentals to Applications”

Recent advances in experimental measurements and numerical simulations has allowed us to discover new phenomena in multiphase turbulence (a flow regime characterized by chaotic and irregular motion in the presence of immersed surfaces/bodies). In this talk, I will discuss some of these new discoveries and their importance both from a fundamental and an application viewpoint. […]

MEAM Seminar: “Robot Design Concepts for Intuitive Physical Human-Robot Interaction”

Physical human-robot interaction (pHRI) aims at taking advantage of the complementary capabilities of robots and humans. One of the key challenges in pHRI is to provide a high-bandwidth human-robot interaction that is safe and intuitive for the human user. To this end, it is proposed in this work to revisit the design of robots in […]

MEAM Seminar: “Cell Polarization and Growth”

Polarization is an essential behavior of living cells, yet the dynamics of this symmetry-breaking process are not fully understood. We have developed a spatial stochastic model of cellular polarization during mating of Saccharomyces cerevisiae. Specifically we investigated the ability of yeast cells to sense a spatial gradient of mating pheromone and respond by forming a […]

MEAM Seminar: “Recent Evolution of Climate Science: From Greenhouse Gases and Temperature to Aerosol Particles and Precipitation”

On the eve of the Intergovermental Panel on Climate Change (IPCC) Sixth Assessment Report, I will present a brief overview of how climate science has evolved since the publication of the Charney Report in 1979, and use a few examples from my recent work to show how one can use numerical models, observations and theories […]

MEAM Seminar: “Microdevices Enabled by Rarefied Flows”

In this talk we will review emerging applications of rarefied gas dynamics for microscale sensing, actuation and power generation. Performance of conventional fluidic devices such as pumps, combustors and heat engines decreases at the microscale due to greater viscous and heat transfer losses. Unconventional micro/nanodevices exploit the tight coupling between non-equilibrium gas, liquid and solid-state […]

MEAM Doctoral Dissertation Defense: “Applications of a Double-stranded Elastic Rod Model to DNA”

In the first part of the presentation, we discuss a double-stranded elastic rod (birod) model and apply it to study allosteric interactions between two ligands on DNA. Next, we combine the birod model with statistical mechanics and use it to study the temperature-induced strand separation in dsDNA. Allosteric interaction between two ligands on DNA is […]

MEAM Seminar: “Liquid Crystal Elastomers”

Liquid crystal elastomers are rubbery solids with liquid crystal mesogens incorporated into their main chains. They display an isotropic to nematic phase transformation accompanied by a large spontaneous deformation. This in turn leads to rich variety of phenomena including ultra-soft behavior, stripe domains, shape-morphing etc. Further, when made as slender structures, the structural instability of […]

MEAM Seminar: “Plate Mechanical Metamaterials and their Applications”

Recently, we introduced the concept of plate mechanical metamaterials—cellular plates with carefully controlled periodic geometry and unique mechanical properties—as well as its initial realization in the form of freestanding corrugated plates made out of an ultrathin film. We used atomic layer deposition (ALD) and microfabrication techniques to make robust plates out of a single continuous […]

MEAM Seminar: “Confined Curved Shells and their Elaborate Conformations”

Curved shells, when confined, can deform to a broad assortment of large scale shapes and smaller scale wrinkling and folding patterns quite unlike what produced by their flat counterparts. The intrinsic, natural curvature of shells is the central element that allows for this rich and very interesting morphological landscape, but it is also the source […]

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