Inspiratory stretch by mechanical ventilation worsens lung injury. However, it is not clear whether and how the ventilator damages lungs in the absence of preexisting injury. We hypothesized that subtle loss of lung aeration during general anesthesia regionally augments ventilation and distension of ventilated air spaces. In eight supine anesthetized and intubated rats, hyperpolarized gas MRI w...

The influence of sorption-induced coal matrix deformation on the evolution of porosity and permeability of fractured coal seams is evaluated, together with its influence on gas recovery rates. The porosity-based model considers factors such as the volume occupied by the free-phase gas, the volume occupied by the adsorbed phase gas, the deformation-induced pore volume change, and the sorptionind...

Fluids supplied by stored magma at depth are causal factors of volcanic unrest, as they can cause pressurization/heating hydrothermal systems. However, evidence for links between pressurization, CO2 emission and volcano seismicity have remained elusive. Here, we use recent (2010−2020) observations Campi Flegrei caldera (CFc) to show pressure, gas CFc share common source areas well-matching temp...

Introduction Hyperpolarized (HP) gas MRI in small animals is challenging and generally requires a dedicated ventilator system. Moreover, the use of expensive rare isotopes such as He and Xe make it desirable to minimize cost by recycling these gases after they have been used for imaging. We present a constantvolume ventilator that offers precise control of gas delivery, permits highresolution i...

Low energy (1-loop) constraints on anomalous triple gauge boson vertices (TGV’s) are revisited and compared to the sensitivity achievable at LEP II and at future linear e+e− colliders. The analysis is performed within the framework of an effective Lagrangian of gauge invariant dimension six operators with the gauge bosons and a single Higgs doublet field as the low energy degrees of freedom. Th...

Gas reservoirs usually have high recovery due to high mobility and low residual gas saturation, although some of them producing under water-drive mechanism have low recovery efficiency. Encroachment of water into these reservoirs traps considerable amount of gas and increases the maximum residual gas saturation, which results in the reduction of gas and condensate production. Generally, the rec...

Using a modification of the forced oscillation technique we have measured respiratory resistance before and after nebulised salbutamol therapy in 32 wheezing children aged 7 months to 3 years 7 monts. 12 of the children were also studied in a total body plethysmograph. No child under 18 months of aged showed a greater than 5% fall in resistance or any fall in thoracic gas volume. In contrast, 1...

the purpos of this paper is to aim the maximum heat transfer rate in a plate-fin heat exchanger with a constant volume and a contant surface area at a prescribed pressure drop. this paper propose a method for design a plat-fin heat exchanger in which a maximum pressure drop occurs at a constant volume and surface are. in this paper as a case study, a preheater of a gas turbine which is a plate-...