Search results for "soiling"
showing 3 items of 3 documents
FUNCTIONAL NONRETENTIVE FECAL SOILING AND STRESSFUL LIFE EVENTS
2019
Introduction: Functional non-retentive fecal soiling (FNRFS), or encopresis without constipation, is a common problem in pediatric age. FNRFS is associated with high levels of distress for both children and parents and with emotional disorders in about 30%-50% of affected children. This study aimed to evaluate stressors on a sample of children with FNRFS comparing to a group of typical devolpment children (TDC). Methods:154 subjects participated in the study: 56 FNRFS children (37 males; mean age 10.87 years ± 1.68); 98 TDC (65 males; mean age 11.3 years ± 1.85). All participants were evaluated for the presence of stressful events (LCU) using the Coddington Life Events Scales (CLES). Result…
Geochemical records of limestone façades exposed to urban atmospheric contamination as monitoring tools?
2008
International audience; Magnetic susceptibility, surface rock soiling, elemental composition and lead isotope ratios were measured in surface stone samples collected at different heights of a late 19th century building in Dijon, France. We targeted four limestone facades that differ in orientation and proximity to car traffic. It seems that zinc, copper, sulphur and cadmium are present as diffuse pollutants in urban atmosphere, at least at the scale of the building studied. In contrast, lead and arsenic exhibit point sources: automotive traffic and past coal-burning fly-ash emissions; both coherent with lead isotopic composition measurements. Parameter variations primarily result from expos…
A validated energy model of a solar dish-Stirling system considering the cleanliness of mirrors
2020
Solar systems based on the coupling of parabolic concentrating collectors and thermal engines (i.e. dish-Stirling systems) are among the most efficient generators of solar power currently available. This study focuses on the modelling of functioning data from a 32 kWe dish-Stirling solar plant installed at a facility test site on the University of Palermo campus, in Southern Italy. The proposed model, based on real monitored data, the energy balance of the collector and the partial load efficiency of the Stirling engine, can be used easily to simulate the annual energy production of such systems, making use of the solar radiation database, with the aim of encouraging a greater commercialisa…