An experimental lung model was used, with controlled ventilation, to determine the effect of different circle arrangements and varying ventilatory frequencies on the efficiency of carbon dioxide removal from a circle system without carbon dioxide absorption. Greater efficiency was found when fresh gas entered the system between the unidirectional inspiratory valve and the subject that when the ...

Machines would be more useful if they could learn to perform tasks for which they were not given precise methods. Difficulties that attend giving a machine this ability are discussed. It i s proposed that the program of a stored-program computer be gradually improved by a learning procedure which tries many programs and chooses, from the instructions that may occupy a given location, the one mo...

Abstract Coriolis, turbine, V-cone, and orifice meters have been used in measurement of gas production shale wells. Flange-tapped concentric are commonly volumes due to their low cost, accuracy, ease maintenance compared other types meters. However, wells producing at high flow rates, pressure, possibly compositions change, which might affect volumetric accuracy that was developed for conventio...

The effect of gas flaring involving some areas of the Niger Delta in Nigeria has been successfully carried out. Four villages were considered under this work: Aghigho, Obagi, Imeh and Edikan. An analysis of the volume of carbondioxide produced in each of the villages was carried out. The results of the analysis revealed that the effect of flaring associated gas on the environment is high based ...

Sharafkhaneh, Amir, Todd M. Officer, Sheila GoodnightWhite, Joseph R. Rodarte, and Aladin M. Boriek. Novel method for measuring effects of gas compression on expiratory flow. Am J Physiol Regul Integr Comp Physiol 287: R479–R484, 2004. First published April 29, 2004; 10.1152/ajpregu.00573.2003.—During forced vital capacity maneuvers in subjects with expiratory flow limitation, lung volume decre...

The objective of the present study was to determine the shelf life of ready-to-eat cooked chicken breast fillets (shredded) stored in atmospheres that were modified with different concentrations of CO2 and to establish a relationship between the concentration of this gas and bacterial growth. The samples were divided into 7 groups with different packaging conditions: aerobiosis, vacuum, and 10,...

Organic-rich shales were found in the Ordovician to Silurian Wufeng-Longmaxi Formation northwestern Guizhou province, China, which has high shale gas content revealed by field measurement. Shale occurrence, free gas/sorbed ratio, and their influencing factors are crucial for exploitation strategy. Results indicated that dominated type I kerogen, with total organic carbon (TOC) equivalent vitrin...

Controlled ripening of climacteric fruits, such as bananas and avocados, is a critical step to provide consumers with high-quality products while reducing postharvest losses. Prior to ripening, these fruits can be stored for an extended period of time but are usually not suitable for consumption. However, once ripening is initiated, they undergo irreversible changes that lead to rapid quality l...

Gas injection into heavy oil reservoirs could result in high ultimate recovery of oil. Experimental studies showed that an application of a combined technology of Gas Assisted Gravity Drainage (GAGD) and Vapor Extraction (VAPEX) could increase final oil recovery of a candidate viscous oil reservoir. In this paper the results of laboratory investigation are presented, including Pressure-Volu...