Results 11 to 20 of about 28,738 (129)

Emitter discharge variability of subsurface drip irrigation in uniform soils: effect on water-application uniformity [PDF]

, 2008
Emitter discharge of subsurface drip irrigation (SDI) decreases as a result of the overpressure in the soil water at the discharge orifice. In this paper, the variation in dripper discharge in SDI laterals is studied.
Gil Rodríguez, María, Juana Sirgado, Luis, Losada Villasante, Alberto, Rodríguez Sinobas, Leonor, Sánchez Calvo, Raúl   +4 more
core   +2 more sources

Analysis of Chromatic Aberration Effects in Triple-Junction Solar Cells Using Advanced Distributed Models [PDF]

, 2011
The consideration of real operating conditions for the design and optimization of a multijunction solar cell receiver-concentrator assembly is indispensable.
Algora del Valle, Carlos, Espinet González, Pilar, García Vara, Iván, Rey-Stolle Prado, Ignacio   +3 more
core   +2 more sources

Prototype emitter for use in subsurface drip irrigation: Manufacturing, hydraulic evaluation and experimental analyses [PDF]

, 2014
The current research aims to analyse theoretically and evaluate a self-manufactured simple design for subsurface drip irrigation (SDI) emitter to avoid root and soil intrusion. It was composed of three concentric cylindrical elements: an elastic silicone
Arriel Botrel, Tarlei, Duarte Coelho, Rubens, Rodríguez Sinobas, Leonor, Souza, Wanderley de Jesus, Sánchez Calvo, Raúl   +4 more
core   +2 more sources

Multi-Sensor System For Level Measurements With Optical Fibres [PDF]

, 2002
A system for measuring liquid level in multiple tanks using optical fibre technology has been developed. The oil field service industry can benefit from this intrinsically safe technology.
Garcinuño, J., Gonzalo, Ana B., Sánchez-Pena, José Manuel, Vázquez García, María Carmen   +3 more
core   +2 more sources

Perda de carga localizada em gotejadores integrados em tubos de polietileno Local head losses for integrated drippers in polyethylene pipes

Engenharia Agrícola, 2010
Este trabalho foi desenvolvido para analisar as perdas de carga localizadas em gotejadores coaxiais integrados em tubos de polietileno. A perda de carga para diferentes vazões foi determinada em quatro modelos de tubos gotejadores, com sete repetições ...
Anthony W. A. Gomes, José A. Frizzone, Osvaldo Rettore Neto, Jarbas H. de Miranda   +3 more
doaj   +1 more source

Unraveling the high-energy emission components of gamma-ray binaries [PDF]

, 2013
The high and very-high energy spectrum of gamma-ray binaries has become a challenge for all theoretical explanations since the detection of powerful, persistent GeV emission from LS 5039 and LS I +61 303 by Fermi/LAT.
Aharonian, Felix, Bosch-Ramon, Valentí, Khangulyan, Dmitry, Zabalza, Víctor   +3 more
core   +1 more source

Methods of Parallel Voxel Manipulation for 3D Digital Printing [PDF]

, 2007
A novel digital printing concept is explored for desktop fabrication of multimaterial objects with arbitrary 3D geometry. Digital objects are composed of many discrete, self-aligning voxels instead of continuous (analog) deposition techniques.
Hiller, Jonathan, Lipson, Hod
core   +1 more source

Perda de carga localizada em emissores não coaxiais integrados a tubos de polietileno Local head loss for uncoaxial drippers inserted in polyethylene pipes

Engenharia Agrícola, 2009
Este trabalho apresenta os resultados de experimento conduzido para avaliar as perdas de carga localizadas em gotejados não coaxiais integrados a tubos de polietileno.
Osvaldo Rettore Neto, José A. Frizzone, Jarbas H. Miranda, Tarlei A. Botrel   +3 more
doaj   +1 more source

Modelagem para o dimensionamento de um sistema de microirrigação utilizando microtubos ramificados Modeling for the design of a micro-irrigation system using branched microtubes

Revista Brasileira de Engenharia Agrícola e Ambiental, 2012
Este trabalho foi realizado com o objetivo de se modelar e avaliar o comportamento hidráulico de microtubos ramificados, com base na relação entre vazão e comprimento dos microtubos para uma pressão de entrada, operando sob regime laminar.
Dinara G Alves, Marinaldo F Pinto, Conan A Salvador, Alexsandro C. S Almeida, Ceres D. G. C de Almeida, Tarlei A Botrel   +5 more
doaj   +1 more source

Performance of non woven synthetic fabric and disc filters for fertirrigation water treatment Desempenho dos filtros de mantas não tecidas e de disco no tratamento de água para fertirrigação

Scientia Agricola, 2004
Obstruction of emitters caused by the presence of solid particles in the water raises the cost and maintenance of trickle irrigation systems, and might compromise their utilization.
Túlio Assunção Pires Ribeiro, José Euclides Stipp Paterniani, Rogério Pereira da Silva Airoldi, Marcelo Jacomini Moreira da Silva   +3 more
doaj   +1 more source