Concept

Époque de Muromachi

Publications associées (40)

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Mechanisms of cement hydration

Karen Scrivener

The current state of knowledge of cement hydration mechanisms is reviewed, including the origin of the period of slow reaction in alite and cement, the nature of the acceleration period, the role of calcium sulfate in modifying the reaction rate of tricalc ...

2010

Managerial ownership dynamics and firm value

Rüdiger Fahlenbrach

From 1988 to 2003, the average change in managerial ownership is significantly negative every year for American firms. We find that managers are more likely to significantly decrease their ownership when their firms are performing well, but not more likely ...

2009

Optimization of antitachycardia pacing protocols applied to atrial fibrillation: insights from a biophysical model

Jean-Marc Vesin, Laurent Renaud Uldry, Lukas Kappenberger

We present a model-based systematic study of antitachycardia pacing protocols applied to atrial fibrillation, focusing on the ability to achieve and maintain capture during pacing, as a function of both pacing site and period. We observed that pacing sites ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

SEMI-PERSISTENT SCHEDULING FOR TRAFFIC SPURTS IN WIRELESS COMMUNICATION

Adel Aziz

Techniques for efficiently assigning resources for spurts of traffic in a wireless communication system are described. The system may support semi-persistent and non-persistent resource assignments. A semi-persistent resource assignment is valid for as lon ...

2008

Is U.S. Fiscal Policy Optimal?

Luisa Lambertini

We find and compare two simple fiscal rules. The first is a theoretical rule that approximates well Ramsey-optimal fiscal policy in a DSGE model calibrated to the U.S. economy over the period 1955:1 to 2007:3. The second is an empirical rule that approxima ...

Center for Fiscal Policy Working Paper Series2008

Nanostructuring of surfaces for optical and visual security applications using lithography techniques

Nowadays, the use of micro- or nano-patterned surfaces is well established in wide fields of science and in numerous applications in the industry. Periodic surface-relief profiles with dimensions in the wavelength range of the light can act as diffractive ...

Institut de Microtechnique, Université de Neuchâtel2007

Artificial Life X

Dario Floreano

Artificial Life is an interdisciplinary effort to investigate the fundamental properties of living systems through the simulation and synthesis of life-like processes in artificial media. The field brings a powerful set of tools to the study of how high-le ...

MIT Press2006

Optimization of finite diffraction gratings for the excitation of surface plasmons

Olivier Martin

The excitation of a surface plasmon polariton (SPP) wave on a metal-air interface by a diffraction grating under monochromatic normal illumination is investigated numerically. The influence of the different experimental parameters (grating thickness, perio ...

2006

Glacial-interglacial evolution of greenhouse gases as inferred from ice core analysis: A review of recent results

Jérôme Chappellaz

The new Antarctic TALDICE ice core (72° 49' S, 159° 11' E, 1620 m depth), containing abundant primary tephras, provides the opportunity to elucidate the late Quaternary volcanic history of the south polar region, as well as to broaden the East Antarctic te ...

Wiley1992

Influence of periodic concentration variations on the product distribution during the oxidation of hydrocarbons

Albert Renken

The influence of forced concn. variations on the oxidn. of hydrocarbons over a Pt gauze catalyst was examd. The period was varied between 0 and 120 sec. The periodic method of operation avoided temp. problems occurring at high conversions under stationary ...

1973