Concept

Semi-proportional representation

Related publications (51)

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From Labyrinth to Piano Key Weirs – A historical review

Anton Schleiss

Free crest spillways are hydraulically efficient and safe in operation. Since their discharge capacity is directly proportional to the crest length several types have been developed with the purpose to increase the length of the latter. Among these types t ...

CRC Press, Taylor & Francis Group2011

Reprint of: Weak epsilon-nets have basis of size O(1/epsilonlog(1/epsilon)) in any dimension

Given a set P of n points in R-d and epsilon > 0, we consider the problem of constructing weak E-nets for P. We show the following: pick a random sample Q of size O(1/epsilon log(1/epsilon)) from P. Then, with constant probability, a weak epsilon-net of P ...

2010

The Effects of Fluid Elasticity on Grid Turbulence

Richard Vonlanthen

Experiments on grid turbulence are reported for pure water and dilute Polyox WSR 301 solutions. A novel passive grid, which consists of a square mesh grid with tethered spheres, has been developed to enhance the turbulence properties. In pure water the new ...

EPFL2010

The effect of surface roughness on the real contact area studied at the atomistic level

Jean-François Molinari, Peter Spijker

Understanding friction has been the goal for many researchers, and although a lot is known about the factors contributing to friction, a complete picture of the origin of friction is still lacking. Besides mechanical based arguments (such as material prope ...

2010

MEMS FOR SPACE

Nico de Rooij, Danick Briand, Herbert Shea, Sebastian Gautsch, Wilfried Noell

Future space exploration will emphasize on cost effectiveness and highly focused mission objectives. Missions costs are directly proportional to its total weight, thus, the trend will be to replace bulky and heavy components of space carriers, communicatio ...

2009

The microcontainer shape in electropolymerization on bubbles

Giorgio Margaritondo

We investigated the microcontainer shape in electropolymerization of polypyrrole (PPy) on bubbles using real-time microradiography. We revealed the existence of a "deformation force" at the three-phase boundary among gas (bubble), liquid (electrolyte), and ...

2009

Does viscoelasticity of a Hydrogel-cell construct affect ECM production?

Dominique Pioletti, Arne Christian Vogel, Line Aschwanden

Intervertebral disc (IVD) degeneration is one of the prevailing medical concern and actual health cost. Industries and academic institutions research for therapeutic solutions going from drugs to complete and partial arthroplasty devices as well as enginee ...

2009

Size effects in the fatigue behavior of welded tubular bridge joints

Alain Nussbaumer, Luís Costa Borges

Tubular space trusses for bridge applications use thick-walled tubes. The reduction in fatigue resistance due to geometrical size effects is thus an important issue. In order to carry out a thorough study, both fatigue tests on large-scale specimens and ad ...

Wiley-Blackwell2008

Mapping Personal Trip OD from Probe Data

Edward Chung

The paper analyses the expected value of OD volumes from probe with fixed error, error that is proportional to zone size and inversely proportional to zone size. To add realism to the analysis, real trip ODs in the Tokyo Metropolitan Region are synthesised ...

2007

Probing the validity of the Derjaguin approximation for heterogeneous colloidal particles

Ramon Pericet Camara, Michal Borkovec

The Derjaguin approximation states that the interaction force between two curved surfaces is proportional to their effective radius, whereby the inverse effective radius is the arithmetic mean of the inverse curvature radii of the surfaces involved. The pr ...

Royal Society of Chemistry2006