Efforts have increased to measure nitrate losses from farmland under different management practices due to environmental and public concerns over levels of nitratenitrogen (NO3-N) in surface and ground waters. This study evaluated the effect of conventional tillage (CT) and strip tillage (ST) practices and three N application rates on NO3-N concentrations in soil water at a 76 cm depth under ir...

The Soil-Water Characteristic Curve (SWCC) is an important soil function relating the water content of a soil to soil suction. Many unsaturated soil properties (or soil property functions) can be related to the water content versus suction relationship of a soil. Hydraulic conductivity, shear strength, chemical diffusivity, water storage, unfrozen volumetric water content, specific heat, and th...

Soil-water characteristic curve (SWCC) correlates the water content of a soil to its suction, which is very important property unsaturated soils. Osmotic tensiometers (OTs) have shown their capability in high suction measurement. This study tried use OT combined with pressure plate and WP4C dewpoint potentiometer determine SWCC residual soil. Three OTs different measuring ranges (900 kPa, 1200 ...

In this paper, the transient refrigerant gas flow in a two-cylinder rolling piston type rotary compressor is simulated using STAR-CD, a general computational fluid dynamics (CFD) software. Three models with different suction piping systems are calculated respectively, one is two suction pipes were connected from accumulator to each cylinder separately (separate suction piping system), the other...

OBJECTIVE To observe the repercussion of respiratory physiotherapy techniques on the mean arterial pressure (MBP), intracranial pressure (ICP), cerebral perfusion pressure (CPP), jugular venous oxygen pressure (PjvO2) and jugular venous oxygen saturation (SjvO2). METHOD The sample consisted of 20 patients with head trauma. The protocol consisted of physiotherapy techniques application of vibr...

INTRODUCTION Removal of pulmonary secretions in mechanically ventilated patients usually requires suction with closed catheter systems or flexible bronchoscopes. Manual ventilation is occasionally performed during such procedures if clinicians suspect inadequate ventilation. Suctioning can also be performed with the ventilator entirely disconnected from the endotracheal tube (ETT). The aim of t...

abstract background: most of the patients admitted in the intensive care units (icus) require an endotracheal tube and mechanical ventilation. in order to clear and maintain patency of the airways, endotracheal suctioning is required. therefore, the least detrimental way of endotracheal tube suctioning which can diminish the complications should be selected. the present study aimed to compare t...

Optimisation provides the means of raising or lowering the target suction pressure in a Honeywell Genus® pack controller. Suction pressure optimisation means that suction pressures are raised to the highest level allowed within defined evaporator performance limits. This provides optimum compressor energy consumption while ensuring that the refrigerated merchandise quality is maintained at the ...