Search results for "environment"
showing 10 items of 28487 documents
Emulation of Sun-Induced Fluorescence from Radiance Data Recorded by the HyPlant Airborne Imaging Spectrometer
2021
The retrieval of sun-induced fluorescence (SIF) from hyperspectral radiance data grew to maturity with research activities around the FLuorescence EXplorer satellite mission FLEX, yet full-spectrum estimation methods such as the spectral fitting method (SFM) are computationally expensive. To bypass this computational load, this work aims to approximate the SFM-based SIF retrieval by means of statistical learning, i.e., emulation. While emulators emerged as fast surrogate models of simulators, the accuracy-speedup trade-offs are still to be analyzed when the emulation concept is applied to experimental data. We evaluated the possibility of approximating the SFM-like SIF output directly based…
Large-scale genotyping identifies 41 new loci associated with breast cancer risk
2013
Journal article Breast cancer is the most common cancer among women. Common variants at 27 loci have been identified as associated with susceptibility to breast cancer, and these account for ~9% of the familial risk of the disease. We report here a meta-analysis of 9 genome-wide association studies, including 10,052 breast cancer cases and 12,575 controls of European ancestry, from which we selected 29,807 SNPs for further genotyping. These SNPs were genotyped in 45,290 cases and 41,880 controls of European ancestry from 41 studies in the Breast Cancer Association Consortium (BCAC). The SNPs were genotyped as part of a collaborative genotyping experiment involving four consortia (Collaborat…
Niche position drives interspecific variation in occupancy and abundance in a highly-connected lake system
2019
Highlights • We studied interspecific variation in occupancy and abundance of freshwater species. • Occupancy and abundance correlated positively for both diatoms and macroinvertebrates. • Niche position had clearest effects on variation in occupancy and abundance. • The more marginal the niche position, the rarer a species is. We examined how niche position, niche breadth, biological traits and taxonomic relatedness affect interspecific variation in occupancy and abundance of two commonly-used biological indicator groups, i.e. diatoms and macroinvertebrates. We studied 291 diatom and 103 macroinvertebrate species that occupied the littoral zones of a large (305 km2) highly-connected freshw…
Self-employment duration in urban and rural locations
2009
Previous research has shown that local environment is important for self-employment. Self-employment dynamics varies between areas characterized by different labour market conditions, entrepreneurial tradition and other structural factors. Alternation between different labour market states (self-employment, paid-employment, non-employment) is also likely to increase if employment opportunities remain low in local labour market markets. This paper analyses the factors influencing the duration of self-employment spells in Finland with a large registered-based data set from the period of 1987-2002. It is evident that rates of exit out of self-employment and the length of self-employment spells…
Impact of Different Washing Conditions on the Release of Ag Species from Textiles
2016
The paper investigates the Ag release from textiles (socks available in shops, cotton and viscose filled with Ag nanoparticles–AgNPs) into a washing solution under different conditions. The released Ag amount depended on various factors, such as test media (chemical composition, temperature and water volume), metal contents, and textile impregnation conditions. Furthermore, it turned out that the textile type and colour were the main parameters affecting the Ag release. The Ag concentration in the washing solution ranged between 0.015 μg/l and 4.44 μg/l (socks) and between 0.61 μg/l and 103 μg/l (AgNPs–filled cotton). The total Ag percentage released into water during one washing varied con…
Study of the Stability of Citrate Capped AgNPs in Several Environmental Water Matrices by Asymmetrical Flow Field Flow Fractionation
2021
Asymmetrical flow field-flow fractionation (AF4) coupled to UV-Vis and dynamic light scattering (DLS) detectors in series, was tested for stability studies of dispersions of citrate-capped silver nanoparticles (AgNPs) in several water matrices. The main goal is to provide knowledge to understand their possible behavior in the environment for short times since mixturing (up to 180 min). Ultrapure (UPW), bottled (BW1, BW2), tap (TW), transitional (TrW) and sea water (SW) matrices were assayed. Observations were compatible with the aggregation of AgNPs, a change in the plasmon band and a size growth with time were done. Fractograms showed different evolution fingerprints in the function of the…
Chimpanzees surviving in a fragmented high‐altitude forest landscape of the Congolese Albertine Rift
2021
This paper documents a community of eastern chimpanzees (Pan troglodytes schweinfurthii Giglioli, 1872) inhabiting three relict forest fragments situated on the Lake Albert escarpment, down the Ituri highlands, of eastern Democratic Republic of the Congo (DRC). The area explored had a combined forested surface of ±18.15 km2 in 2017, shrinking by 1.2% per year between 2010 and 2015. Between 2015 and 2017, we found 160 chimpanzee nests along 37.6 km of pilot walks, some up to 2,000 m altitude. Another 123 nests logged along 6.7 km transects led to an estimate of chimpanzee density of 4.62 weaned individuals per square kilometer of forest habitat. Camera‐trap images and direct observations rev…
Mondi virtuali e realtà virtuale. Un’analisi del fenomeno nella formazione sanitaria
2019
Negli ultimi sei anni la realtà virtuale (VR) e i mondi virtuali (VE) sono diventati sempre più tecnologicamente avanzati e molto più accessibili per quel che riguarda l’accesso economico. In sanità essi vengono utilizzati principalmente per cinque scopi: formazione degli studenti; formazione dei professionisti (simulatori); riabilitazione/terapia; cura/diagnosi e gestione del dolore. In questa review abbiamo analizzato 2.252 articoli pubblicati tra il 2012 e il 2019 su PubMed ed abbiamo organizzato gli articoli nelle aree simulazione per studenti; simulazione per specializzandi; simulazione avanzata per professionisti; applicazioni nei campi medico/dentale/infermieristico (soft skills); re…
Zinc Adsorption by Activated Carbon Prepared from Lignocellulosic Waste Biomass
2019
Sawdust was used as a precursor for the production of biomass-based activated carbon. Carbonization and activation are single-stage processes, and steam was used as a physical activation agent at 800 °
The system of protected areas as the core element in a new vision of the Metropolitan City of Palermo
2022
Un processo di urbanizzazione può certamente essere considerato una delle più significative alterazioni antropiche del sistema ambientale in un territorio. Il presente studio vuole comprendere le caratteristiche spaziali della crescita urbana e i suoi impatti sulle componenti ambientali nella Città Metropolitana di Palermo, un'area in cui i livelli di consumo di suolo inedificato e di pregio, e le conseguenti forme di frammentazione ambientale e territoriale, rischiano di compromettere non solo il valore paesaggistico-ambientale dei territori coinvolti ma anche la loro identità. Partendo da queste premesse, questo contributo esplora il rapporto di reciprocità tra ambiente costruito e territ…