157 research outputs found
Graffiti removal from granite cladding by abrasive water-jet
No full textThis study focuses on the assessment of a graffiti removal system based on abrasive water-jet technology (AWJ). Spray paints were applied on samples of an important Italian granite commercially-named as “Rosa Limbara”. This granite has been used worldwide as dimension stone for paving and cladding. Two different commercial abrasives have been added in the high-pressure water-jet in order to clean the granite saw-plane surfaces from graffiti. After a check by the naked eye, different criteria have been chosen for assessing the effectiveness of the cleaning process: the similarity in roughness (Ra, Rz, and Rmax) between the original surface and the one resulted after cleaning, the total colour difference (ΔE) and the depth of material removed by the AWJ action. The tests showed that excellent cleaning results can be achieved with both abrasives by correctly combining the operational parameters of the technology (i.e., water pressure, spacing between passes, stand-off distance, travel speed and abrasive flow-rate) without giving any damage to the stone material. The two abrasives showed good results in total colour difference although one of them gave better results in both roughness difference and material removal. Economic considerations on paint removal with AWJ technology are also offered
Esperienze cliniche in corso di teleanestesia nella gestione del Cervo sardo (Cervus elaphus corsicanus)
No full text
The management of deep carious lesions and the exposed pulp amongst members of two European endodontic societies: a questionnaire-based study
No full textAims: To investigate and compare views on management of deep caries and the exposed pulp by Endodontic Society members in Ireland (Irish Endodontic Society [IES]) and Italy (Accademia Italiana di Endodonzia [AIE]). Further aims were to investigate the influence of patient-related factors (age, symptoms) and operator-related factors (material choice, antibiotics) on management. Methodology: A structured online questionnaire containing two cases (an 18- and 45-year-old) and two scenarios (± mild symptoms), including history and radiograph, was sent to IES and AIE members. The answers were analysed using chi-square and Fisher's exact test (P < 0.05). Results: In total, 120 dentists participated, representing 49% of the AIE and 48% of the IES membership. Age distribution was similar between the societies; however, most AIE members had no further qualifications (63%), while IES respondents generally had a postgraduate endodontic qualification (71%). AIE respondents carried out a larger volume of vital pulp treatment (VPT) per month, with 69% carrying out over five cases, compared with 22% of IES respondents. The presence of patient symptoms significantly altered treatment planning decisions (P < 0.001) with root canal treatment (RCT) more frequently selected in both societies. Patient age significantly influenced treatment choice in the absence (P = 0.043) or presence (P = 0.012) of symptoms with less VPT advocated in older patients. There were no significant differences in the treatment of a young patient in the presence (P = 0.302) or absence of symptoms (P = 0.297); however, older patient management differed between the societies for symptomatic (P = 0.041) and asymptomatic scenarios (P = 0.044) with significantly more RCTs carried out in the AIE than the IES. Hydraulic calcium silicate materials were commonly selected, accounting for 81% of IES and 69% of AIE VPT materials, although younger members of the AIE preferred calcium hydroxide materials. Younger dentists in both societies prescribed less RCT than older age groups. Conclusions: Although VPT is carried out by members of both societies there was no consistency regarding the most appropriate management for the exposed pulp or the VPT material of choice. Patient symptoms and age significantly influence the decision-making process and invasiveness of treatment. Hydraulic calcium silicate materials were the most commonly advocated material in all groups except young AIE members who preferred calcium hydroxide
The Land Cover of Sardinia (Italy): First Results on Automatic Classification on Burnt Areas
No full textParticulate matter in fly-ash landfills: an abatement technology using anionic flocculant
No full textThis study aims to assess the use of a mix of anionic flocculant and water, in order to reduce the level of fine dust over the ground in a coal fly-ash landfill. So far, the reduction of dust has been achieved by means of water sprays: this method, however, resulted in high costs incurring in the rental of tank trucks; furthermore, the high consumption of water and diffusion of fuel gas both have a major environmental impact. The new method presented below shows how the creation of a thin film over the landfill can limit both wind erosion and dust emission caused by the transit of vehicles during operations. By collecting samplings of dust and laboratory tests, the authors were able to evaluate effectiveness of above mentioned method from a technical, economical and environmental point of view, which has been subsequently resulted in the Company opting for it
Radiographic evaluations of distal navicular border fragments and forefeet conformation in the horse
No full textRadiographic examination has good sensitivity in revealing fragments located at the distal border of the
navicular bone (DSBF) in the dorsoproximal-palmarodistal oblique (DPr-PaDiO) view with a proximo-distal
angle between 55° and 65° (1). DSBF is a common finding in lame horses as well as in radiographic
screenings (2).
Aim of the study was to evaluate the correlation between presence of DSBF and navicular and forefeet
conformation.
The radiographs of 120 horses (Italian Saddlebred and Angloariabian, aged 3-15 years), obtained during
pre-purchase or for diagnostic purposes, were used. Feet were classified in 3 groups: 1. lame feet with
DSBF, 2. lameness-free feet with DSBF, 3. feet from sound horses without DSBF. Location of the lameness
at the foot was confirmed by diagnostic anesthesia in lame horses.
The averages of 3 consecutive measurements of 3 ratios and 1 angle were statistically compared among the
3 groups: 1. distal navicular border length / navicular maximal width ratio (Y/Z), 2. height of sole at the toe /
height of the heels ratio (E/D), 3. length of the toe / length of the foot ratio (C/B), 4. angle of the dorsal
hoof wall to the ground (F).
In feet with DSBF, Y/Z, E/D and C/B ratios were higher if compared with feet without fragment (P<0.05). In
feet with fragment, feet without lameness showed higher E/D ratio than feet with lameness (P<0.05).
Although the difference was not statistically significant, Y/Z and C/B ratios were also higher in lame feet if
compared with non lame feet.
Even if not statistically significant, F angle was smaller in feet with both fragment and lameness and in feet
without fragment if compared with feet with fragment without lameness.
DSBF seem to be more present in navicular bones with more “rectangular” rather “trapezoidal” shape in
the DPr-PaDiO 60° oblique view (high Y/Z ratio) and in feet with long toe-low heel conformation (high E/D
and C/B ratios). This correlation between conformation of the foot, navicular shape and presence of DSBF
suggests an important role of mechanical forces in the occurrence of DSBF in horses's foot and highlight the
importance of early foot trimming and managment.
1) Claerhoudt S. et al. "Association between navicular bone fragmentation and shape in Belgian Warmblood
horses", Vet. Comp. Orthop. Traumatol., 24(2)132-136(2011); 2) Verwilghen D. et al. "Prevalence of
radiographic findings in candidate sires (2001-2008)", Res. Vet. Science, 87,319-328(2009)
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