Search results for "Pool"
showing 10 items of 238 documents
Comparison of Studies on Mobile Phone Use and Risk of Tumors
2010
published results of ameta-analysis of studies on mobile phone use and risk of tumors. Intheir analysis, the authors included 23 case-control studies, covering abroad spectrum of tumor entities including uveal melanoma, testicu-lar cancer, parotid gland tumors, and brain tumors.However, the authors give no rationale for pooling these hetero-geneous, biologically rather diverse cancer sites, for which the local-ized exposure from the use of mobile phones is completely different.The key difference between this particular meta-analysis com-pared with earlier ones is the use of a quality score. The use of qualityscoreshasbeenreportedtobea“formofsubjectivitymasqueradingasobjectivity”andithasbeen…
Occupational Exposure to Extremely Low-Frequency Magnetic Fields and Risk of Amyotrophic Lateral Sclerosis : Results of a Feasibility Study for a Poo…
2021
Bioelectromagnetics 42(4), 271-283 (2021). doi:10.1002/bem.22335
Dissipative scaling of step-pool features
2021
Abstract This paper focuses on the dissipative similarity of step-pool units at rill, flume and stream scale. This investigation is carried out using recent advances in open channel flow resistance, applications of close-range photogrammetry to rill erosion, available published data on step-pool features in flumes and streams and a new dataset of measurements in fixed bed step-pool rills. A theoretically-based equation for calculating the Darcy-Weisbach friction factor obtained by integration of a power velocity profile is presented. The scale factor Γ of this power velocity profile, which is included in the flow resistance equation, was previously calibrated (Eq. 10) for mobile bed rills w…
Automatic Segmentation Using a Hybrid Dense Network Integrated With an 3D-Atrous Spatial Pyramid Pooling Module for Computed Tomography (CT) Imaging
2020
Computed tomography (CT) with a contrast-enhanced imaging technique is extensively proposed for the assessment and segmentation of multiple organs, especially organs at risk. It is an important factor involved in the decision making in clinical applications. Automatic segmentation and extraction of abdominal organs, such as thoracic organs at risk, from CT images are challenging tasks due to the low contrast of pixel values surrounding other organs. Various deep learning models based on 2D and 3D convolutional neural networks have been proposed for the segmentation of medical images because of their automatic feature extraction capability based on large labeled datasets. In this paper, we p…
Chemical, biochemical and microbial diversity through a Pachic Humudept profile in a temperate upland grassland
2013
There is great interest in understanding the factors that drive soil microbial activity and community composition in upland grassland ecosystems. We investigated the role of vertical gradients of chemical properties and various soluble C and N pools on soil microbial community structure by using a combination of chemical and biochemical methods coupled with PCR-denaturing gradient gel electrophoresis (DGGE) community fingerprinting and phospholipid fatty acid (PLFA) profiling. Soil samples were collected at increasing depth from a temperate upland grassland. Soil organic matter-related pools (total organic C and total Kjeldahl N) and functionally related active pools (microbial biomass C an…
Inter-relazioni tra pools di C organico e gruppi funzionali della sostanza organica in un suolo a diversa gestione agronomica
2013
Lavorazioni del suolo e rotazioni colturali giocano un ruolo chiave nell’influenzare sia la quantità sia la qualità della sostanza organica del suolo (SOM). Mentre diversi studi sono stati condotti per valutare gli effetti di tali fattori agronomici sui pools di C organico, anche lungo i profili di suolo, pochi altri hanno investigato anche le relazioni tra i diversi pools di C organico e i gruppi funzionali della SOM. Obiettivi del presente lavoro sono stati quelli di i) valutare gli effetti della lavorazione del suolo e delle rotazioni colturali sui diversi pools di C organico e ii) di investigare le relazioni intercorrenti tra tali pools e i gruppi funzionali della SOM. I campioni di suo…
Dynamics of carbon pools in a soil covered with different forest tree species after controlled heating and wetting
2012
Fire-induced soil heating deeply affects soil organic C pools and their dynamics. The objective of this study was to investigate, in a soil covered with different forest tree species (Eucalyptus camaldulensis, E. occidentalis, Pinus halepensis, and Cupressus sempervirens), the effect of controlled heating on C pools and C mineralization dynamics. Soil samples were heated under controlled condition in laboratory (160 and 380°C) and then wetted with distilled or sea water to simulate the extinction of wildfires. Soil organic C pools react to heating in different way depending on forest tree species. Total organic C was almost halved following the heating of soils at 380°C. Soil covered with P…
Thermal variance affects algal assemblage in rocky pools
2013
The intertidal rocky pools are habitats that, when disconnected from the sea, become highly stressful for sessile organisms such as algae. Algae experience wide changes of water temperature on short temporal scale (e. g. hour or lower) and their coverage and diversity are expected to depend on thermal variance of small water masses trapped at low tide. Here, we want to investigate the relationship between daily thermal variance and the composition, coverage and diversity of rocky pool’s algal community in Western Sicily (Southern MED). We chose 15 intertidal rocky pools and we deployed, in August 2012, thermo-loggers for two days to record temperature changes every 5-min (12 recordings per …
Maxiprocesso
2005
Tra il 1983 e il 1985, l’impressionante sequenza di omicidi e di stragi mafiose che insanguinò l’estremo Sud della Penisola favorì anche la nascita di un forte movimento politico e d’opinione, che reclamava iniziative istituzionali più drastiche per il risanamento sociale ed economico di quelle porzioni del territorio nazionale ove la sovranità dello Stato sembrava ormai espropriata dalle varie consorterie criminali che vi operavano indisturbate. Questo clima di forte mobilitazione politica e civile avrebbe potuto contribuire a spingere le istituzioni verso posizioni di sostegno all’attività degli investigatori e dei magistrati più impegnati nel contrasto alle organizzazioni mafiose. Il 10 …
Soil profile dismantlement by land levelling and deep tillage damages soil functioning but not quality
2016
We investigated the effects of land levelling followed by deep tillage, thus inducing a drastic dismantlement of soil profile, on both soil functioning and quality by monitoring various bioindicators (microbial biomass and community structure, basal respiration, enzyme activities) expressed on either whole soil and TOC mass units, respectively. As expected, in disturbed soils all measured properties had much higher coefficients of variation (CVs), regardless of either whole soil or TOC mass basis, due to the induced spatial variability. The amount of total organic C in the first cubic meter of soil profile was of one order of magnitude greater in undisturbed soils compared to disturbed ones…