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Biological materials found in Nature such as nacre and bone are well recognized as light‐weight, strong, and tough structural materials. The remarkable toughness and damage tolerance of such biological materials are conferred through hierarchical assembly of their multiscale (i.e., atomic‐ to macroscale) architectures and components. Herein, the toughening mechanisms of different organisms at multilength...
Precise radius estimation is of high interest for rebar and pipe characterization but very challenging. In this work, we present a novel 3D frequency-domain full-waveform inversion (FWI) approach with which the geometrical information of subsurface cylindrical objects and the dielectric properties of the penetrating medium are simultaneously extracted from ground penetrating radar (GPR) data. The...
One challenge in laparoscopic cholecystectomy surgery simulation is to construct a fast and accurate deformable gallbladder model. This paper proposed an improved multi-layer mass-spring modeling method which can adapt well to the built-in accelerating algorithms in PhysX-engine of GPU. A multi-layer mass-spring model was constructed based on the surface mesh of a gallbladder. The inner layers of...
We present a multi-core virtual platform which follows single-core architecture, SPARC v8, available as an open source development suite. The proposed multi-SPARC system operates at electronic system level to accelerate its simulation speed. TLM channels are devised to connect the processors. To simplify the use of the proposed virtual platform, we define some specific APIs for data transaction and...
A challenge in virtual reality based laparoscopic cholecystectomy simulation is to construct a fast and accurate deformable gallbladder model. This paper proposes a multi-layer mass-spring model which can adapt well to the built-in accelerating algorithms in PhysX-engine of GPU. The gallbladder is first segmented from clinical CT images. A multi-layer model based on the anatomical structure of gallbladder...
A major challenge in the DoDpsilas next-generation network-centric information systems concerns on-demand provisioning of computation and network infrastructures at tactical network edges (e.g., deploying wireless airborne or hybrid air/ground networks). To support this vision, we present DWARF, a general distributed application execution framework for wireless ad-hoc networks which dynamically allocates...
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