This work investigates the effects of two hydrogels used for the selective removal of a synthetic soiling mixture on mastic, shellac and Laropal® K80 varnishes. The varnishes were spin-coated on aluminium tiles which were subjected to accelerated degradation in a xenon-arc fadeometer. A synthetic mixture, simulating urban pollution, was produced and applied on the degraded varnish films. The fa...

The aim of this study was to assess the medical treatment in comparison with hemorrhoidectomy in the management of primary grade-4 internal hemorrhoidal disease (IH) and external hemorrhoidal disease (CH). Group I (medical treatment): 127 patients (59 IH, 68 CH) were prospectively collected and medically treated using oral tablet of micronized purified flavonoid fraction (MPFF) containing 450 m...

Introduction: Patients operated for correction of anorectal malformations (ARM) can develop fecal incontinence, constipation, and soiling, with loss in quality of life. Objective: To evaluate, through the use of questionnaires, fecal continence, and quality of life of children in the late postoperative follow-up of ARM correction, both high and low. In addition, the levels of fecal continence...

OBJECTIVE To evaluate the health-related quality of life in children with functional defecation disorders. METHODS One hundred children seen consecutively were enrolled and subdivided into three subsets according to the Roma II classification criteria: functional constipation (n = 57), functional fecal retention (n = 29) and nonretentive functional soiling (n = 14). The generic instrument Chi...

Soiling is the accumulation of dirt in solar panels that leads to a decreasing trend energy yield and may be cause vast revenue losses. The effect soiling can reduced by washing panels, which is, however, procedure non-negligible cost. Moreover, monitoring systems are often unreliable or very costly. We study problem estimating ratio photovoltaic (PV) modules, i.e., real power output would prod...

Abstract Solar photovoltaic technology faces many challenges in climates that are characterized by arid nature with high dust frequencies and relative humidity levels, which make build-up extremely problematic. Soiling condensation affect the performance of PV systems greatly degrades their power output. Covering panels during non-operation will improve overall efficiency reduce soiling. In pre...

The solar irradiation at the gulf Arabia is considered one of highest in world. However, this region classified as a desert with high dust accumulation. Thus, objective study to analyze effect soiling and photovoltaic (PV) tilt angle on performance 2.0 MWp car park PV plant Oman. Experimental measurements were taken model was developed for simulation. power generation by cleaned system measured...

Soiling is the accumulation of dust on solar panels that causes a decrease in optical efficiencies of CSP systems. However, geographically widespread data is only available for solar photovoltaic (PV) systems. The changes in efficiency of a large commercial site (86.4 kWdc) was quantified during the summer dry period over the course of 2010 with respect to rain events observed at a nearby weath...

Soiling is responsible for a loss of 3%–4% the potential global solar power production that estimated to rise because increased deployment in dusty environments [Ilse et al., Joule 3, 2303–2321 (2019)]. For effective mitigation strategies and site selection soiling ratio data crucial. can be measured directly by comparing or short circuit current soiled PV cell module clean photovoltaic (PV) de...