Search results for "ground"
showing 10 items of 2432 documents
Estimation of the Quality of Ground Waters Provided for the Water-Supply System in the Area of Gogolin Commune
2000
Habitat area and local habitat conditions outweigh fragmentation effects on insect communities in vineyards
2022
Fragmentation of habitat, for example by intensive agricultural practices, can be detrimental to local biodiversity. However, it often remains unclear whether such biodiversity declines are caused by loss of habitat area or increased fragmentation, and how habitat quality factors into it. In our study system, vegetated vineyards are typically small, and isolated from one another, potentially limiting the distribution and dispersal of organisms. In a full-factorial experiment of a priori selected vegetated vineyard patches of differing size and fragmentation, we aimed to disentangle the effects of habitat area (area of vegetated vineyards), habitat fragmentation (number of vegetated vineyard…
Modelling and analysing oriented fibrous structures
2014
Abstract. A mathematical model for fibrous structures using a direction dependent scaling law is presented. The orientation of fibrous nets (e.g. paper) is analysed with a method based on the curvelet transform. The curvelet-based orientation analysis has been tested successfully on real data from paper samples: the major directions of fibrefibre orientation can apparently be recovered. Similar results are achieved in tests on data simulated by the new model, allowing a comparison with ground truth. peerReviewed
Online ^{222}Rn removal by cryogenic distillation in the XENON100 experiment
2017
International audience; We describe the purification of xenon from traces of the radioactive noble gas radon using a cryogenic distillation column. The distillation column was integrated into the gas purification loop of the XENON100 detector for online radon removal. This enabled us to significantly reduce the constant$^{222}$ Rn background originating from radon emanation. After inserting an auxiliary$^{222}$ Rn emanation source in the gas loop, we determined a radon reduction factor of $R\,>\,27$ (95% C.L.) for the distillation column by monitoring the$^{222}$ Rn activity concentration inside the XENON100 detector.
The XENON1T Dark Matter Experiment
2017
The XENON1T experiment at the Laboratori Nazionali del Gran Sasso (LNGS) is the first WIMP dark matter detector operating with a liquid xenon target mass above the ton-scale. Out of its 3.2 t liquid xenon inventory, 2.0 t constitute the active target of the dual-phase time projection chamber. The scintillation and ionization signals from particle interactions are detected with low-background photomultipliers. This article describes the XENON1T instrument and its subsystems as well as strategies to achieve an unprecedented low background level. First results on the detector response and the performance of the subsystems are also presented. © 2017, The Author(s).
Excess electronic recoil events in XENON1T
2020
We report results from searches for new physics with low-energy electronic recoil data recorded with the XENON1T detector. With an exposure of 0.65 t-y and an unprecedentedly low background rate of $76\pm2$ events/(t y keV) between 1 and 30 keV, the data enables sensitive searches for solar axions, an enhanced neutrino magnetic moment, and bosonic dark matter. An excess over known backgrounds is observed at low energies and most prominent between 2 and 3 keV. The solar axion model has a 3.4$\sigma$ significance, and a 3D 90% confidence surface is reported for axion couplings to electrons, photons, and nucleons. This surface is inscribed in the cuboid defined by $g_{ae}<3.8 \times 10^{-12}$,…
Millainen iskelmälaulaja on hyvä esiintyjä? : esiintyjät, yleisö ja businessihmiset kertovat
2004
Prescriptive practices in an English-speaking language-oriented online community : a case study of Your Grammar Sucks videos
2016
Internetin myötä kielenkäyttäjille on avautunut lukuisia mahdollisuuksia julkaista tekstejään ja mielipiteitään ja saada ne mahdollisesti hyvin suuren yleisön nähtäville. Perinteisiin medioihin kuten kirjoihin, sanoma- ja aikakauslehtiin sekä televisioon verrattuna Internetin keskustelupalstoilla, blogisivustoilla ja sosiaalisen median sivustoilla, kuten Facebookissa, kielenkäyttö on verrattain vapaata. Samaan aikaan kun kirjoittajille on avautunut vapaus julkaista kirjoituksiaan instituutioiden niitä rajoittamatta, kielenkäyttäjät ovat ottaneet tehtäväkseen valvoa toistensa kieltä kritisoimalla ja korjaamalla toisten kirjoituksia sekä määrittämällä, mikä on hyväksyttävää kielenkäyttöä ja m…
Creating entrepreneurial opportunities : interpretative research about role of POP Advertising Displays in customer purchase decision making
2013
Las prácticas de los Cuerpos Académicos como factor de la formación ética de estudiantes. Estudio en casos
2015
ResumenSe reporta una investigación cualitativa cuyo objetivo fue develar cómo infl la racionalidad instrumental de las políticas en las prácticas de los cuerpos académicos y la formación ética de estudiantes. Se reunieron 17 narrativas de profesores de dos universidades. El análisis combinó los procedimientos de teoría fundamentada y etnografía. Se encontró que: a) la racionalidad instrumental se refleja en las interacciones académicas y en las finalidades priorizadas; b) se busca formar en la ética del reconocimiento y el compromiso, pero mediante la socialización en la que afloran la reificación y la cooperación interesada. Se plantea la pertinencia de una formación ético-crítica.Abstrac…