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Publications associées (371)

Water Supply: The cost structure of water utilities in Switzerland

This paper estimates a translog cost function for Swiss water utilities. From the cost function, we are able to estimate measures of marginal costs as well as economies of production density, customer density and scale, which are important determinants in ...

HEG2009

Towards Integrated and Efficient Scientific Sensor Data Processing: A Database Approach

Karl Aberer, Jie Wu

In this work, we focus on managing scientific environmental data, which are measurement readings collected from wireless sensors. In environmental science applications, raw sensor data often need to be validated, interpolated, aligned and aggregated before ...

2009

Local restoration for trees and arborescences

Laura Sanità

Protocols belonging to the Spanning Tree Protocol (STP) route traffic demands on tree topologies that are evaluated through shortest path procedures. In this paper we deal with the problem of assigning costs to the arcs of a network in order to guarantee t ...

Springer Berlin / Heidelberg2009

Screen-printed polymer-based microfluidic and micromechanical devices based on evaporable compounds

Peter Ryser, Thomas Maeder, Caroline Jacq, Yannick Sébastien Fournier, Nathalie Sophie Adeline Serra

We investigate in this work the fabrication of polymer fluidic and mechanical devices based on evaporable compounds as sacrificial layers using the screen-printing process. The combination of thermosetting polymer resins with evaporable compounds as sacrif ...

IMAPS2009

A column generation algorithm for a vehicle routing problem with economies of scale and additional constraints

Matteo Salani

We present an optimization algorithm developed for a provider of software planning tools for distribution logistics companies. The algorithm computes a daily plan for a heterogeneous fleet of vehicles, that can depart from different depots and must visit a ...

2009

An Economic Model for Self-tuned Cloud Caching

Anastasia Ailamaki, Debabrata Dash

Cloud computing, the new trend for service infrastructures requires user multi-tenancy as well as minimal capital expenditure. In a cloud that services large amounts of data that are massively collected and queried, such as scientific data, users typically ...

2009

Retrieving Ancient Maya Glyphs with Shape Context

Daniel Gatica-Perez, Jean-Marc Odobez, Edgar Roman Rangel

We introduce an interdisciplinary project for archaeological and computer vision research teams on the analysis of the ancient Maya writing system. Our first task is the automatic retrieval of Maya syllabic glyphs using the Shape Context descriptor. We inv ...

IEEE2009

Disseminating Streaming Data in a Dynamic Environment: an Adaptive and Cost-Based Approach

In a distributed stream processing system, streaming data are continuously disseminated from the sources to the distributed processing servers. To enhance the dissemination efficiency, these servers are typically organized into one or more dissemination tr ...

Springer-Verlag2008

Dynamic network security deployment under partial information

Jean-Yves Le Boudec, Georgios Theodorakopoulos

A network user’s decision to start and continue using security products is based on economic considerations. The cost of a security compromise (e.g., worm infection) is compared against the cost of deploying and maintaining a sufficient level of security. ...

2008

Intelligent realisation of ground energy

Lyesse Laloui, Hervé Péron, Mathieu Nuth

There is a need to reduce the economic cost of the energy geostructures and increase the efficiency of such systems, which will also rationalise the environmental impact. ...

2008

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