This article presents a project that aims at constructing a biologically inspired amphibious snake-like robot. The robot is designed to be capable of anguilliform swimming like sea-snakes and lampreys in water and lateral undulatory locomotion like a snake on ground. Both the structure and the controller of the robot are inspired by elongate vertebrates. In particular, the locomotion of the rob...

SYNOPSIS. We present a mathematical model and numerical method designed to study the fluid dynamics of swimming organisms. The full Navier-Stokes equations are solved in a domain of fluid within which an organism undergoing time-dependent motions is immersed. Of interest are both the dynamics of a single organism and the relationship of its morphology to its motility properties, as well as the ...

Cathodoluminescence (CL) images of kyanite reveal several internal textures, including sector zoning, oscillatory and cross-cutting relationships among different domains. Many textures observed in correspond to discrete events, thereby connecting the pressure–temperature (P–T) history rock. To evaluate record metamorphism preserved by kyanite, metapelites were selected from three orogens that r...

The ubiquitous cooperative locomotion in a fluid has long been considered to gain evolutionary advantages by increasing the efficiency of living creatures. Synchronization between undulatory swimmers, such as spermatozoa and eels at low high Reynolds numbers respectively, attracted much attention for its theoretical importance dynamics. Such swimmers propel themselves generating travelling wave...

Introduction: The basolateral amygdala (BLA) and infralimbic area (IL) of the medial prefrontal cortex (mPFC) are two interconnected brain structures that mediate both fear memory expression and extinction. Besides the well-known role of the BLA in the acquisition and expression of fear memory, projections from IL to BLA inhibit fear expression and have a critical role in fear extinction. Howev...

We consider plane wave modes in ultracold, but not quantum degenerate, dipolar Fermi gases the hydrodynamic limit. Longitudinal waves present anisotropies both speed of sound and their damping, experience a small, undulatory effect flow velocity. Two distinct types shear appear, ``familiar" one, another that is accompanied by nontrivial density temperature modulations. propose these as an exper...