Rocket measurements of electron density, electron temperature and the earth's magnetic field above Fort Churchill

Electron density, electron temperature, and earth magnetic field above Fort Churchill from rocket measurement

The effects of nanosilica on the fresh and hardened properties of 3D printable mortars

This study presents the experimental results of an investigation on the effects of nanosilica NS on the material characteristics of printable mortars used for additive manufacturing. Printable cement mortars based on Ordinary Portland Cement, limestone filler and silica sand were modified with different dosages of nanosilica from 2 to 6 by weight of binder and its influence on their hydration, rheological, mechanical and transport properties was assessed. The study showed that NS accelerates significantly the setting and hardening of printable mortar, while reducing its open time. Moreover, an increment of yield stress, together with an increment in NS dosage, was found to have occurred. The incorporation of an optimal NS dosage results in a noticeable increase in the compressive strength and alteration of the pore structure as determined by the MIP measurements. Moreover, transport properties of the produced mortar are significantly improved due to incorporation of NS. In addition to the microstructure refinement, Micro CT and scanning electron microscopy SEM studies revealed that 3D printed mortars exhibit pore anisotropy in accordance with the printing direction. However, incorporation of NS in the mixture resulted in improved buildability, thus decreasing pore anisotrop

Does Reviewing Lead to Better Learning and Decision Making? Answers from a Randomized Stock Market Experiment

status: publishe

Photo-interprétation et cartographie morpho-pédologique en pays méditerranéens (Argolis, Grèce)

As a result of the combined study of field observations and analytical investigations of aerial photographs it is shown that the direct (tonality, texture) and indirect photographic criteria ( geomorphological factors, vegetation) permit a good identification and delimitation of homogeneous areas which, in mediterranean regions, correspond to well defined morpho-pedological units.Suite à une étude combinée d'observations de terrain et d'analyses de photos aériennes, il es.t démontré qu'à l'aide de critères photographiques directs (tonalité, texture) et indirects (géomorphologie, végétation), il est possible d'identifier et de délimiter, en pays méditerranéen, des zones homogènes qui correspondent à des ensembles morpho-pédologiques bien déterminés.Lootens-De-Muynck M.-T., Verheye W. Photo-interprétation et cartographie morpho-pédologique en pays méditerranéens (Argolis, Grèce). In: Méditerranée, deuxième série, tome 27, 4-1976. pp. 39-51

The potential of electrical imaging for field root zone phenotyping

peer reviewedProviding enough food for a growing population while preserving natural resources and biodiversity is one of the challenges of the 21st century. A key pathway to maximize yields in a sustainable way is to select and grow crops that are optimally adapted to their environment. Plant performance is determined by characteristics or ‘traits’ which are partially genetically determined. Nevertheless, cultivars with the same genome (G) express different appearances or ‘phenomes’ in different environments (E) and under different management practices (M). Phenotyping the below-ground traits of plants is not straightforward, due to the opaque nature of soil. Non-invasive geophysical techniques to study the root zone have substantially advanced in recent years.Their biggest potential lies in indirect monitoring of water depletion in the root zone, especially in time-lapse mode. To explore the potential of integrating geophysics in a field phenotyping platform, we first generated a range scenarios of soil moisture dynamics for different soils and grass cultivars. Then we generated ERT data from these distributions for selected electrode setups and then inverted them back to obtain conductivity distributions. In this way, we checked the performance of different electrode arrays to delineate root water uptake patterns in various realistic conditions.EMPHASIS-BELGIU