Concept

Neumann boundary condition

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Gaugino mass in AdS space

Riccardo Rattazzi, Claudio Scrucca

We study supersymmetric QED in AdS(4) with massless matter. At 1-loop the ultra-violet regulator of the theory generates a contribution to the gaugino mass that is naively inconsistent with unbroken supersymmetry. We show that this effect, known in flat sp ...

2009

Large-eddy simulation of a mildly curved open-channel flow

Koen Blanckaert

After validation with experimental data, large-eddy simulation (LES) is used to study in detail the open-channel flow through a curved flume. Based on the LES results, the present paper addresses four issues. Firstly, features of the complex bicellular pat ...

Cambridge University Press2009

Reduced Basis Methods and A Posteriori Error Estimators for Heat Transfer Problems

Simone Deparis, Gianluigi Rozza

This paper focuses on the parametric study of steady and unsteady forced and natural convection problems by the certified reduced basis method. These problems are characterized by an input-output relationship in which given an input parameter vector — mate ...

ASME2009

Gauge boson mass generation in AdS(4)

Riccardo Rattazzi

We investigate the role of boundary conditions in gauge theories in AdS(4). The presence of the boundary can break the gauge symmetry consistently with AdS(4) isometries. We show that, as a consequence, the gauge bosons associated to the broken symmetries ...

2009

Bio-electromagnetic model of deep brain stimulation

Grégoire Walckiers

Functional stimulation is one of the most fascinating applications of bioelectromagnetism. It deals with the stimulation of excitable biological tissues by electromagnetic fields. One of its most impressive medical applications is the subthalamic nucleus d ...

EPFL2009

Deposition of sediment mixture due to jet effluent into a rectangular shallow reservoir

Anton Schleiss, Sameh Ahmad Kantoush

Shallow reservoirs are threatened by fast filling up with sediments, even if the entering sediments are only suspended loads. The sedimentation process is strongly influenced by the geometry of such shallow reservoirs. In the framework of a research projec ...

2009

On heat transfer at microscale with implications for microactuator design

Michail Zervas, Yusuf Leblebici, Mustafa Yilmaz, Özgür Özsun

The dominance of conduction and the negligible effect of gravity, and hence free convection, are verified in the case of microscale heat sources surrounded by air at atmospheric pressure. A list of temperature-dependent heat transfer coefficients is provid ...

Institute of Physics2009

Multiscale modelling of urban climate

Adil Rasheed

Climate has a direct impact on cities' energy flows due to the space conditioning (heating, cooling) needs of the buildings accommodated. This impact may be reinforced due to climate change and to the (so called) urban heat island effect. The corresponding ...

EPFL2009

Lattice Boltzmann method for the simulation of viscoelastic fluid flows

Orestis Pileas Malaspinas

The simulation of flows of viscoelastic fluids is a very challenging domain from the theoretical as well as the numerical modelling point of view. In particular, all the existing methods have failed to solve the high Weissenberg number problem (HWNP). It i ...

EPFL2009

Characterization and modeling of twinned dendrite growth

Mario Alberto Salgado Ordorica

The formation of feathery grains during semi-continuous casting of Al-alloys [1, 2] is an interesting problem from both practical and theoretical points of view. These structures are formed by a lamellar sequence of twinned and untwinned regions separated ...

EPFL2009