Evidence of the role of earthworms in the regeneration of compacted soils under field conditions

At the INRA Estrées-Mons experimental site, the possible role of earthworm in the regeneration of compacted soils was studied in a reduced tillage plot where a compaction event was done using a 8-tons tractor on a wet soil. Earthworm communities and earthworm burrow systems were then studied either 2 weeks after or 8 or 24 months after the compaction in the control or compacted zone. Earthworms were observed to recolonise the compacted zone in less than 8 months whereas the regeneration of earthworm burrows was a slower process under field conditions

Comment on “Impact of Load Frequency Dependence on the NDZ and Performance of the SFS Islanding Detection Method”

International audienceWe read with interest an article [1] published in the IEEE Transactions on Industrial Electronics in 2011 and tried to reproduce the results of this article for the needs of our own research. Unfortunately, we were led to think that the load model equations used by the authors contained an inconspicuous but significant mathematical error, leading to erroneous results and conclusion. The present paper brings a correction to some figures and their analysis as well as the paper conclusion. The new results show that the load's frequency dependence has actually no significant impact on the NDZ of the SFS method. Index Terms—Distributed generation (DG), inverter, islanding detection, Sandia frequency shift (SFS)

Animating Injury: Trauma Rite as Personal Exhibition and Public Exposition

Honors (Bachelor's)Women's StudiesComparative LiteratureUniversity of Michiganhttps://deepblue.lib.umich.edu/bitstream/2027.42/139607/1/ecadoux.pd

The effect of the displacement damage on the Charge Collection Efficiency in Silicon Drift Detectors for the LOFT satellite

The technology of Silicon Drift Detectors (SDDs) has been selected for the two instruments aboard the Large Observatory For X-ray Timing (LOFT) space mission. LOFT underwent a three year long assessment phase as candidate for the M3 launch opportunity within the "Cosmic Vision 2015 -- 2025" long-term science plan of the European Space Agency. During the LOFT assessment phase, we studied the displacement damage produced in the SDDs by the protons trapped in the Earth's magnetosphere. In a previous paper we discussed the effects of the Non Ionising Energy Losses from protons on the SDD leakage current. In this paper we report the measurement of the variation of Charge Collection Efficiency produced by displacement damage caused by protons and the comparison with the expected damage in orbit.Comment: 17 pages, 7 figures. Accepted for publication by Journal of Instrumentatio

Computing deep facet-defining disjunctive cuts for mixed-integer programming

The problem of separation is to find an affine hyperplane, or ''cut'', that lies between the origin O and a given closed convex set Q in a Euclidean space. We focus on cuts which are deep for the Euclidean distance, and facet-defining. The existence of a unique deepest cut is shown and cases when it is decomposable as a combination of facet-defining cuts are characterized using the reverse polar set. When Q is a split polyhedron, a new description of the reverse polar is given. A theoretical successive projections algorithm is proposed that could be used to compute deep facet-defining split cuts

Rats on the Rocks: Does Intermittent Stress Exposure During Adolescence Lead to Increases in Alcohol Drinking?

Finalist for Awar