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Ji Paraná, Brazil

do Prado G.,DEA | Colombo A.,Federal University of Lavras
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013

A procedure is described to determine and evaluate radial water distribution profiles for a sprinkler head operating at conditions intermediate to those of the tests. Forty water distribution profiles from a PLONA-RL250 sprinkler, obtained under different combinations of 8 nozzle diameters and 5 working pressures, were used. Profiles determined under pressures of 294, 490, 686 kPa were used to generate profiles for 392 and 588 kPa pressures. Profiles determined for 14 × 6, 18 × 6, 22 × 6 and 26 × 6 mm nozzle diameters were used to reproduce radial profiles for 16 × 6, 20 × 6 and 24 × 6 mm nozzle diameters. The radial profiles generated for working pressure and nozzle diameters, compared to the radial profiles observed, respectively, had mean values of: i) determination coefficient of 0.921 and 0.921; ii) coefficient of variation of 9.5 and 9.4%; iii) probability (Student t test) of 88.5 and 87.3%. Computer simulations of water application uniformity from radial profiles observed and generated for working pressure and nozzle diameters presented, respectively, mean absolute deviation of 1.36 and 1.44%. The procedure proposed does not influence significantly the values of water application uniformity. Source


Araujo E.R.,Federal University of Paraiba | da Silva T.O.,DEA | Menezes R.S.C.,Federal University of Pernambuco | Fraga V.S.,Federal University of Paraiba | Sampaio E.V.S.B.,Federal University of Pernambuco
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2011

Biomass production and N, P and K uptake by four forage species were compared in three soils from the semi-arid region of Paraíba, with or without organic manure. The species were three legumes (Desmanthus virgatus, Macroptilium martii and Macroptilium lathyroides) and one grass (Cenchrus ciliaris); the soils, a Fluvic Neosol, a Regolithic Neosol and Haplic Planosol; and cattle manure was applied at a dose equivalent to 20 Mg ha -1. Manure application resulted in large increases in biomass production and nutrient uptake, in all species and soils. Apparently, the manure supplied enough P but not enough N and K to the plants, confirming that it is a good source of the first nutrient. Macroptilium martii and Macroptilium lathyroides seem to be the highest biomass producers, mainly in response to fertilization. Cenchrus ciliaris had higher K concentrations and contents than the legumes, indicating a larger K absorption capacity. There was no correspondence between soil analysis and nutrient supplying capacity. Source


Pierce C.S.,University of Aberdeen | Howell J.,University of Aberdeen | Rieke H.,DEA | Healy D.,University of Aberdeen
2nd Conference on Forward Modelling of Sedimentary Systems: From Desert to Deep Marine Depositioned Systems | Year: 2016

Page Sandstone Formation (Bathonian - Bajocian) outcrops around Lake Powell have been studied as reservoir analogues to deeply buried gas bearing aeolian (Rotliegend) reservoir in NW Germany. The study is based on an extensive virtual outcrop model gathered using terrestrial LIDAR combined with ground based and UAV (drone) acquired images. A petrophysical dataset was collected and integrated with eleven traditional outcrop logs. The Virtual Outcrop Model encompasses a c. 1 km2 cliff-outcrop volume (with the Page Fm. extending up to 55m thick locally). Page Fm. deposits represent the downwind migration of smaller aeolian bedforms superimposed on larger both slipfaceless and sinuous crested compound dunes. Hierarchal complexity which includes 8 lithofacies distributed in a framework with at least 4 orders of bounding surface provides an excellent opportunity to develop multi-scale modelling techniques for aeolian reservoirs. Geocellular models have been built to satisfy the macro, meso and micro scale heterogeneity. Ongoing work is focussed upon developing mesoscale models using the refined depositional model to inform a series of process based using bedform forward modelling software (after Rubin, 1987). The modelling focusses upon populating with the petrophysical data and used to determine Representative Elemental Volumes for the different scales of heterogeneity within the system. © 2016, European Association of Geoscientists and Engineers, EAGE. All rights reserved. Source


Lirici M.M.,San Giovanni Hospital | Romeo V.,San Giovanni Hospital | Simonelli L.,DEA | Tierno S.,San Giovanni Hospital | Vitelli C.E.,San Giovanni Hospital
Obesity Surgery | Year: 2016

Background: Laparoscopic sleeve gastrectomy has become a popular stand-alone procedure among bariatric surgeons. Recently, Natural Orifice Specimen Extraction laparoscopic surgery has been introduced to avoid minilaparotomy, possibly reducing postoperative pain, hospital stay, and improving QoL and cosmetics. Operative steps and preliminary results of NOSE sleeve gastrectomy are described and reported. Methods: Five patients underwent NOSE LSG from November 2014 to March 2015. Selection criteria were as follows: age <60 years, ASA score ≤III, BMI <50. Operative steps are the same of standard LSG, but the stomach transection that starts higher on the greater curvature. A 2–3 cm width opening is created on the exceeding antrum and the resected stomach sutured to the calibration probe tip, which is pull back allowing transoral specimen extraction. The exceeding antrum is stapler-trimmed, allowing breach closure and completion of tubulization. Results: Mean age was 41.6 years (median 43), average weight was 123.6 Kg (median 114), mean BMI 43.6 Kg/m2 (median 44). Mean operation time was 72 min (median 75). Mean and median postoperative stay were 4.6 and 5. No intraoperative nor postoperative complications occurred. Postoperative day 1 mean and median VAS pain score at were 1.4 and 1, respectively. Follow-up ranged 1–5 months (mean and median 3), average weight loss was 19.8 Kg (median 19), and excess weight loss 36.2 % (median 32 %). Conclusions: NOSE LSG potential advantages are as follows: improved cosmetics, decreased postoperative pain, possible incisional hernia rate reduction. No objective data are available to confirm these theoretical benefits; larger observational studies and RCTs are mandatory before clinical validation. © 2015, Springer Science+Business Media New York. Source


do Prado G.,DEA | Faria L.C.,CDTec Engineering | de Oliveira H.F.E.,Ceres | Colombo A.,Federal University of Lavras
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013

The effect of different trajectory angles of a gun sprinkler associated with different nozzle diameters and working pressures on the radius of throw and water distribution profile were assessed in this study. The technical characterization of the gun sprinkler was carried out at a sprinkler test bench of the Universidade Federal de Lavras, at Lavras, MG, for 24 different working conditions. In function of nozzle diameter (18 and 22 mm), service pressure (294, 392, 490 and 588 kPa) and trajectory angle (16, 22 and 28o), a potential equation was adjusted to estimate the radius of throw. Furthermore, along the radius of throw the percentage distribution of the amount of water applied was analysed. For low working pressures associated with trajectory angle of 16o, higher reductions were observed on the radius of throw; from the 28o trajectory angle, for every 3o drop of the trajectory angle the radius of throw is reduced by approximately 3.4 to 4.0%; for trajectory angles higher than 22o associated with working pressures higher than 392 kPa, the amount of water applied from the gun sprinkler is more between 60 and 80% of radius of throw. Source

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