Publications related to Irreducible fraction

Defect levels of dangling bonds in silicon and germanium through hybrid functionals

Alfredo Pasquarello, Peter Broqvist, Audrius Alkauskas

Defect levels of dangling bonds in silicon and germanium are determined within their respective band gaps through the use of hybrid density functionals. To validate our approach, we first considered the dangling bond in silicon finding two well-separated d ...

2008

Vector modelling of hydrating cement microstructure and kinetics

Shashank Bishnoi

A new modelling framework, called μic, has been developed to enable simulations of complex particulate growths, in particular the microstructural evolution of hydrating cement paste. μic has been developed using the vector approach, which preserves the mul ...

EPFL2008

Variable latency speculative addition: A new paradigm for arithmetic circuit design

Paolo Ienne, Philip Brisk, Ajay Kumar Verma

Adders are one of the key components in arithmetic circuits. Enhancing their performance can significantly improve the quality of arithmetic designs. This is the reason why the theoretical lower bounds on the delay and area of an adder have been analysed, ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008

Ion Beam Etching: Replication of Micro Nano-structured 3D Stencil Masks

Jürgen Brugger, Luis Guillermo Villanueva Torrijo

Ion beam LIGA allows the etching of 3D nano-structures by direct writing with a nano-sized beam. However, this is a relatively time consuming process. We propose here another approach for etching structures on large surfaces and faster, compared to the dir ...

2008

Atlantic Southern Ocean productivity: Fertilization from above or below?

Athanasios Nenes

Primary productivity and the associated uptake of atmospheric carbon dioxide in the Southern Ocean (SO) is thought to be generally limited by bioavailable iron (Fe). Two sources of Fe for the surface waters of the SO have been proposed: (1) oceanic input o ...

2007

Impact of small amounts of swelling clays on the physical properties of debris-flow-like granular materials. Implications for the study of alpine debris flow

Paul Bowen, Pascal Boivin, Eric Bardou

The effect of the small fraction of clays on the rheological behaviour of alpine debris flow is poorly understood. This is partly due to the complexity of the debris flow mineralogy and the broad particle size distribution. This study has investigated this ...

2007

Chapter 3: MHD stability, operational limits and disruptions

Olivier Sauter, Timothy Goodman, Hartmut Zohm

Progress in the area of MHD stability and disruptions, since the publication of the 1999 ITER Physics Basis document (1999 Nucl. Fusion 39 2137-2664), is reviewed. Recent theoretical and experimental research has made important advances in both understandi ...

2007

Charged excitons in modulation-doped quantum wires

Elyahou Kapon, Benjamin Dwir, Marc-André Dupertuis, Daniel Oberli, Nicolas Moret

We report on the observation of negatively- and positively-charged excitons in the photoluminescence spectra of V-groove quantum wires. The. charged exciton binding energy increases with the strength of the quantum confinement. We demonstrate that fluctuat ...

American Institute of Physics2005

Managing Heterogeneous Wireless Environments via Hotspot Servers

Giovanni De Micheli

Wireless communication today supports heterogeneous wireless devices with a number of different wireless network interfaces (WNICs). A large fraction of communication is infrastructure based, so the wireless access points and hotspot servers have become mo ...

2005

Improved Decoding of Interleaved AG-Codes

Mohammad Amin Shokrollahi, Lorenz Minder, Andrew Brown

We analyze a generalization of a recent algorithm of Bleichenbacher et al.~for decoding interleaved codes on the

Q

-ary symmetric channel for large

Q

. We will show that for any

m

and any

\epsilon

the new algorithms can decode up to a fraction of at ...

2005

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Defect levels of dangling bonds in silicon and germanium through hybrid functionals

Vector modelling of hydrating cement microstructure and kinetics

Variable latency speculative addition: A new paradigm for arithmetic circuit design

Ion Beam Etching: Replication of Micro Nano-structured 3D Stencil Masks

Atlantic Southern Ocean productivity: Fertilization from above or below?

Impact of small amounts of swelling clays on the physical properties of debris-flow-like granular materials. Implications for the study of alpine debris flow

Chapter 3: MHD stability, operational limits and disruptions

Charged excitons in modulation-doped quantum wires

Managing Heterogeneous Wireless Environments via Hotspot Servers

Improved Decoding of Interleaved AG-Codes

Defect levels of dangling bonds in silicon and germanium through hybrid functionals

Ion Beam Etching: Replication of Micro Nano-structured 3D Stencil Masks

Vector modelling of hydrating cement microstructure and kinetics

Variable latency speculative addition: A new paradigm for arithmetic circuit design

Impact of small amounts of swelling clays on the physical properties of debris-flow-like granular materials. Implications for the study of alpine debris flow

Atlantic Southern Ocean productivity: Fertilization from above or below?

Chapter 3: MHD stability, operational limits and disruptions

Charged excitons in modulation-doped quantum wires

Managing Heterogeneous Wireless Environments via Hotspot Servers

Improved Decoding of Interleaved AG-Codes