Accelerating masses are predicted to emit radiation as gravitational waves. It has been suggested that these waves may interact differently with quantum mechanical systems than with classical matter. The possibility that a quantum system may act as a novel transducer between electromagnetism and gravitational waves is investigated. A proposed mechanism for interconversion between the two fields...

Flexible mechanical metamaterials are compliant structures engineered to achieve unique properties via the large deformation of their components. While static character has been studied extensively, study dynamic is still at an early stage, especially in nonlinear regime induced by high deformability. Nevertheless, recent studies show that these systems provide new opportunities for control amp...

Enteric glia are important participants in information processing in the enteric nervous system. However, intercellular signaling mechanisms in enteric glia remain largely unknown. We postulated that intercellular calcium waves exist in enteric glia. Primary cultures of enteric glia were isolated from neonatal guinea pig taenia coli. Intracellular calcium in individual cells was quantified with...

It is shown that information transmission inside a cell can occur by means of mechanical waves transmitted through DNA. The propagation of the waves is strongly dependent on the shape of the DNA thus proteins that change the shape of DNA can alter signal transmission. The overall effect is a method of signal processing by DNA binding proteins that creates a ”cellular communications network”. Th...

The hydrodynamical model of quantum mechanics based on the Schrödinger equation is combined with the magnetohydrodynamical term to form so called quantum magnetohydrodynamic equation. It is shown that the quantum correction to the Alfvén waves follows from this new equation. The possible generalization is considered for the so called nonlinear Schrödinger equation and for the situation where di...

where θ = ∇ · u is the dilation and u is the displacement. The stress tensor σ ≡ σij , where (1.3) σij = θλδij + 2Gǫij + ν1θ,tδij + ν2ǫij,t + τij . In Eq. (1.1), c denotes the free cytosolic calcium concentration, D is its effective diffusion coefficient, f(c) is the function describing calcium transport into and out of the cytosol. In Eq. (1.3), ǫij are the components of the deformation tensor...

Many diverse studies have shown that a mechanical displacement of the axonal membrane accompanies the electrical pulse defining the action potential (AP). We present a model for these mechanical displacements as arising from the driving of surface wave modes in which potential energy is stored in elastic properties of the neuronal membrane and cytoskeleton while kinetic energy is carried by the...

development of ultrasound technique has not been progressing for evaluating the internal quality of fruits as fast as that of processed foods. in this research for quality assessment of pear fruit (shah miveh variety) an ultrasonic measurement system was constructed to transmit and receive the ultrasonic waves. the apparatus included a pulser-receiver, a pair of 75 khz ultrasonic transducers wi...

This research employs a nondestructive, rapid, high accuracy and full-field material characterization platform which integrates quantitative laser ultrasound visualization system (QLUVS) with mechanical property mapping reconstruction algorithm. The QLUVS uses a pulsed laser generate acoustic waves with fast scanning mechanical to research two dimensional scanning goal and then detected with a ...

Gravitational waves are a prediction of Einstein's general theory of relativity. These waves are created by massive objects, like neutron stars or black holes, oscillating at speeds appreciable to the speed of light. The detectable effect on the Earth of these waves is extremely small, however, creating strains of the order of 10(-21). There are a number of basic physics experiments around the ...