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Publications associées (64)

Incremental Query Evaluation in a Ring of Databases.

This paper approaches the incremental view maintenance problem from an algebraic perspective. We construct a ring of databases and use it as the foundation of the design of a query calculus that allows to express powerful aggregate queries. The query calcu ...

2010

Pd-functionalized MEMS resonator for hydrogen gas sensing at ambient pressure

Jürgen Brugger, Luis Guillermo Villanueva Torrijo, Thomas Kiefer, Jonas Gustav Henriksson

This work presents the fabrication and characterization of a novel hydrogen-detecting micro-resonator based on the expansion of palladium (Pd) as it is exposed to hydrogen (H2) gas. The working principle of the device has been confirmed and it shows a stro ...

2010

Pd-functionalized MEMS resonator for hydrogen gas sensing

Jürgen Brugger, Luis Guillermo Villanueva Torrijo, Thomas Kiefer, Jonas Gustav Henriksson

2010

Tetraalkylammonium Salts of Weakly Coordinating Aluminates: Ionic Liquids, Materials for Electrochemical Applications and Useful Compounds for Anion Investigation

Michael Graetzel, Mingkui Wang, Ines Raabe

In this study, we investigated the tetraalkylammonium salts of the weakly coordinating fluorinated alkoxyaluminates pftb (Al(O(C(CF3)(3))(4)) hfip (Al(OC(H)-(CF3)(2))(4)) and hftb (Al(OC(CH3)(-) (CF3)(2))(4)) in order to obtai ...

2009

Nonlinear Optical Spectroscopy of Soft Matter Interfaces

Sylvie Roke

Soft matter consists of complex molecules that can undergo drastic structural transformations under mild changes of chemical and physical conditions. Since a wide variety of chemical, physical and biological processes occur at soft matter interfaces, they ...

2009

Structure and thermal stability of arc evaporated (Ti0.33Al0.67)(1-x)SixN thin films

(Ti0.33Al0.67)(1-x)SixN (0

2008

Anomalous double peak structure in superconductor/ferromagnet tunneling density of states

Paul Sangiorgio

We have experimentally investigated the density of states (DOS) in Nb/Ni (S/F) bilayers as a function of Ni thickness, d(F). Our thinnest samples show the usual DOS peak at +/-Delta(0), whereas intermediate-thickness samples have an anomalous "double-peak" ...

2008

Inferring thermodynamic properties from CCN activation experiments: Single-component and binary aerosols

Athanasios Nenes

This study presents a new method, Köhler Theory Analysis (KTA), to infer the molar volume and solubility of organic aerosol constituents. The method is based on measurements of surface tension, chemical composition, and CCN activity coupled with Köhler the ...

European Geosciences Union2007

Toxicity assessment of the main pesticides used in Costa Rica

Raphael Charles

The impacts of the 30 active substances, most used in Costa Rica (reference year 1998), are evaluated using two models originally developed to support comparative assertions in the context of the life cycle assessment: the multimedia fate, exposure and eff ...

2007

Conformational Changes and Aggregation of Alginic Acid as Determined By Fluorescence Correlation Spectroscopy

Marianne Seijo, Fabrice Avaltroni, Serge Stoll

Insight into the conformations and aggregation of alginic acid was gained by measuring its diffusion coefficient at very dilute concentrations using fluorescence correlation spectroscopy. Both the pH and ionic strength (I) had an important influence on the ...

American Chemical Society2007

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