Concept

Physical schema

Publications associées (58)

Collaborative Schema Matching Reconciliation

Schema matching is the process of establishing correspondences between the attributes of database schemas for data integration purpose. Although several schema matching tools have been developed, their results are often incomplete or erroneous. To obtain c ...

Springer-Verlag Berlin2013

Completeness and Ambiguity of Schema Cover

Karl Aberer, Quoc Viet Hung Nguyen, Zoltán Miklós

Given a schema and a set of concepts, representative of entities in the domain of discourse, schema cover deﬁnes correspondences between concepts and parts of the schema. Schema cover aims at interpreting the schema in terms of concepts and thus, vastly si ...

2013

A comparison between two statistical and a physically-based model in snow water equivalent mapping

Michael Lehning, Mathias Thierry Pierre Bavay, Tobias Jonas

Snow water equivalent (SWE) estimates at the end of the winter season have been compared for the 2002–2006 period in a 200 km2 mountainous area in Switzerland, using three different models. The first model, ALPINE3D, is a physically based process-oriented ...

Elsevier2013

Scale Effects in Modelling Two-phase Air-water Flows

Michael Pfister

Beside analytical approaches, physical modelling represents probably the oldest design tool in hydraulic engineering. For free surface flows, the similitude according to a Froude similarity allows for a correct representation of the dominant forces, namely ...

TPU2013

Physical Modeling of Sediment Trap for Le Bez River, Switzerland

Giovanni De Cesare, Azin Amini, Romain Nathan Hippolyte Merlin Van Mol, Najla Schaller

The Le Bez torrent in the Canton of Bern, Switzerland, is known for flashy and violent floods due to its watershed topography and vegetation conditions. Such floods can bring a substantial amount of sediment and wood into the small downstream village of Vi ...

2013

Automated Physical Designers: What You See is (Not) What You Get

Anastasia Ailamaki, Ioannis Alagiannis

The explosion of available data in the last few years has increased the importance of physical database design, since the selection of proper physical structures (e.g. indices, partitions and materialized views) may improve query execution performance by s ...

ACM2012

Room Helps: Acoustic Localization With Finite Elements

Martin Vetterli, Ivan Dokmanic

Acoustic source localization often relies on the free-space/far-field model. Recent work exploiting spatio-temporal sparsity promises to go beyond these scenarios, however, it requires the knowledge of the transfer functions from each possible source locat ...

Ieee2012

Climatic physical snowpack properties for large-scale modeling examined by observations and a physical model

Michael Lehning

Here we have conducted an integral study using site observations and a model with detailed snow dynamics, to examine the capability of the model for deriving a simple relationship between the density and thermal conductivity of the snowpack within differen ...

2012

Semantic Sensor Data Search in a Large-Scale Federated Sensor Network

Karl Aberer, Jean Paul Calbimonte Perez, Ho Young Jeung

Sensor network deployments are a primary source of massive amounts of data about the real world that surrounds us, measuring a wide range of physical properties in real time. However, in large-scale deployments it becomes hard to eectively exploit the data ...

CEUR-WS2011

Algebraic turbulence modeling in adiabatic and evaporating annular two-phase flow

John Richard Thome, Andrea Cioncolini

The study considers algebraic turbulence modeling in adiabatic and evaporating annular two-phase flow, focusing in particular on momentum and heat transfer (so-called 'convective boiling') through the annular liquid film. In contrast with single-phase wall ...

2011

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