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Université de Neuchâtel

Ein DSP-Synthesetool für schnelle Low-Power-Implementatierungen von DSP-Algorithmen

Drollinger, Andreas ; Heubi, Alexandre ; Balsiger, Peter ; Pellandini, Fausto

In: IEEE Signal Processing Society (DSP Deutschland), 2000, p. 1-7

Dieser Artikel präsentiert ein high-level DSP-Synthesetool für Zyklus-limitierte Filter- und Datenpfadapplikationen. Das Synthesetool bildet einen einfachen und schnellen Designweg von der Gleichungsbeschreibung eines DSP-Algorithmus bis hin zu einer synthetisierbaren VHDL-Beschreibung. Es erzeugt anwendungs-spezifische DSP-Architekturen, welche den hohen Randbedingungen von...

Université de Neuchâtel

The role of tributary mixing in chemical variations at a karst spring, Milandre, Switzerland

Perrin, J. ; Jeannin, Pierre-Yves ; Cornaton, Fabien

In: Journal of Hydrology, 2007, vol. 332, no. 1-2, p. 158-173

Solute concentration variations during flood events were investigated in a karst aquifer of the Swiss Jura. Observations were made at the spring, and at the three main subterraneous tributaries feeding the spring. A simple transient flow and transport numerical model was able to reproduce chemographs and hydrographs observed at the spring, as a result of a mixing of the concentration and...

Université de Neuchâtel

Reply to “Comment on groundwater age, life expectancy and transit time distributions in advective–dispersive systems : 1. Generalized reservoir theory” by Timothy R. Ginn

Cornaton, Fabien ; Perrochet, Pierre

In: Advances in Water Resources, 2007, vol. 30, no. 4, p. 1058-1059

We thank T.R. Ginn for his interest in our recently published article (1) on the subject of groundwater age modelling and reservoir theory. In his previous comment (2), T.R. Ginn expresses concern about some conceptual inconsistencies in the formulations presented in our work. We basically agree with the fundaments of his comments, and we wish to continue the discussion. (1) F. Cornaton and P....

Université de Fribourg

Safe for saplings; safe for seeds ?

Smit, Christian ; Gusberti, Michele ; Müller-Schärer, Heinz

In: Forest Ecology and Management, 2006, vol. 237, no. (1-3), p. 471-477

In wood pastures spatial associations of tree saplings with nurse structures such as unpalatable plants are generally explained as associational resistance; i.e. reduced herbivory by association with a defended neighbour. However, these associations may result from other underlying processes that occur at the seed stage. Here we tested whether the observed associations between...

Université de Fribourg

Effects of reduced rates of two insecticides on enzyme activity and mortality of an aphid and its lacewing predator

Booth, L. H. ; Wratten, S. D. ; Kehrli, Patrik

In: Journal of Economic Entomology, 2007, vol. 100, no. 1, p. 11-19

By applying insecticides at lower rates of active ingredients per unit area, survival rates of the pests' natural enemies can be enhanced, whereas pest mortality can remain high. The effects of reduced application rates of the insecticides lambda-cyhalothrin and dimethoate on the mortality of bird cherry-oat aphid, Rhopalosiphon padi (L.), and lacewing Micromus tasmaniae Walker were determined in...

Università della Svizzera italiana

Willingness to pay for energy-saving measures in residential buildings

Banfi, Silvia ; Farsi, Mehdi ; Filippini, Massimo ; italiana, Svizzera ; Jakob, Martin

In: Energy Economics, 2008, vol. 30, no. 2, p. 503-516

This paper uses a choice experiment to evaluate the consumers' willingness to pay for energy-saving measures in Switzerland's residential buildings. These measures include air renewal (ventilation) systems and insulation of windows and facades. Two groups of respondents consisting respectively of 163 apartment tenants and 142 house owners were asked to choose between their housing status quo...

Università della Svizzera italiana

Regulation and measuring cost-efficiency with panel data models : application to electricity distribution utilities

Farsi, Mehdi ; Filippini, Massimo

In: Review of Industrial Organization, 2004, vol. 25, no. 1, p. 1-19

This paper examines the performance of panel data models in measuring cost efficiency of electricity distribution utilities. Different cost frontier models are applied to a sample of 59 utilities operating in Switzerland from 1988 to 1996. The estimated coefficients and inefficiency scores are compared across different specifications. The results indicate that while the average inefficiency is...

Université de Neuchâtel

Odour-mediated long-range avoidance of interspecific competition by a solitary endoparasitoid : a time-saving foraging strategy

Tamò, Cristina ; Roelfstra, Lise-Lore ; Guillaume, Suzanne ; Turlings, Ted C. J.

In: Journal of Animal Ecology, 2006, vol. 75, no. 5, p. 1091–1099

1. In studies on optimal foraging strategies, long-range decisions in the pursuit of resource are rarely considered. This is also the case for sympatric parasitoids, which may be confronted with the decision to accept or reject host larvae that are already parasitized by a competing species. They can be expected to reject already parasitized hosts if it is likely that they will lose the...

Université de Fribourg

Density and nutritional condition of carabid beetles in wildflower areas of different age

Frank, Thomas ; Kehrli, Patrik ; Germann, Christoph

In: Agriculture, Ecosystems and Environment, 2007, vol. 120, no. 2-4, p. 377-383

Density and nutritional condition of the five carabid beetle species Agonum mülleri, Anchomenus dorsalis, Anisodactylus binotatus, Pterostichus vernalis and Poecilus cupreus was studied. Carabids were caught in sixteen 1–4-year-old wildflower areas, identified and counted, their nutritional condition was calculated and calculations were related to habitat...