Publication

Time evolving bed shear stress due the passage of gravity currents estimated with ADVP velocity measurements

Publications associées (32)

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Image analysis technique applied to lock-exchange gravity currents

Helena Isabel Dos Santos Nogueira, Claudia Adduce

An image analysis technique is used to estimate the two-dimensional instantaneous density field of unsteady gravity currents produced by full-depth lock-release of saline water. An experiment reproducing a gravity current was performed in a 3.0 m long, 0.2 ...

Institute of Physics2013

Proposed new probe of modified gravity

Alexey Boyarsky, Oleg Ruchayskiy

We suggest a new efficient way to constrain a certain class of large scale modifications of gravity. We show that the scale-free relation between density and size of dark matter halos, predicted within the ACDM model with Newtonian gravity, gets modified i ...

2011

Consistent Extension of Horava Gravity

Sergey Sibiryakov, Diego Blas Temino

We propose a natural extension of Horava's model for quantum gravity, which is free from the notorious pathologies of the original proposal. The new model endows the scalar graviton mode with a regular quadratic action and remains power-counting renormaliz ...

2010

Gravity and observer's body orientation influence the visual perception of human body postures

Olaf Blanke, Christophe Lopez, Manuel Mercier, Christelle Bachofner

Since human behavior and perception have evolved within the Earth's gravitational field, humans possess an internal model of gravity. Although gravity is known to influence the visual perception of moving objects, the evidence is less clear concerning the ...

Association for Research in Vision and Ophthalmology2009

Galileon as a local modification of gravity

Riccardo Rattazzi

In the Dvali-Gabadadze-Porrati (DGP) model, the "self-accelerating" solution is plagued by a ghost instability, which makes the solution untenable. This fact, as well as all interesting departures from general relativity (GR), are fully captured by a four- ...

2009

Null energy condition and superluminal propagation

Riccardo Rattazzi

We study whether a violation of the null energy condition necessarily implies the presence of instabilities. We prove that this is the case in a large class of situations, including isotropic solids and fluids relevant for cosmology. On the other hand we p ...

2006

Contribution of entrainment and vertical plumes to the winter cascading of cold shelf waters in a deep lake

Ulrich Lemmin

Observations made from vertical moorings of thermistors and current meters are used to analyze the relative contribution of the entrainment of overlying water and the cold plumes convecting from the surface to the cascade of dense shelf waters down the sid ...

American Society of Limnology and Oceanography2002

Transplanckian collisions at the LHC and beyond

Riccardo Rattazzi

Elastic collisions in the transplanckian region, where the center-of-mass energy is much larger than the fundamental gravity mass scale, can be described by linearized general relativity and known quantum-mechanical effects as long as the momentum transfer ...

2002

The fate of the radion in models with metastable graviton

Riccardo Rattazzi

We clarify some general issues in models where gravity is localized at intermediate distances. We introduce the radion mode, which is usually neglected, and we point out that its role in the model is crucial. We show that the brane bending effects discusse ...

2000

Localizing gravity on a string-like defect in six dimensions

A study was carried out to determine what happens with gravity around a 3-brane of a specific structure in 6D spacetime with a negative cosmological constant. It was shown that there is a normalizible graviton zero mode attached to the stringlike defect, a ...

2000