This paper describes the modifications and evolution of a thermal pulse combustionmodel for predicting the combustion oscillations of an aerovalved 250 kW pulse combustorincorporating a soot formation-combustion model. Validation of the model is carried out from theexperimental data of an aerovalved Helmholtz type pulse combustor, where a sinusoidal air inlet massflow coupled with pressure osci...

ulcerative colitis is a mucosal-inflammatory disease that usually involves the rectum and extends proximally to involve all or part of the colon. medications for treatment include anti-inflammatory agents such as 5-asa compounds, systemic and topical corticosteroids and immunomodulators. a 33 year-old female and 52 year-old male both diagnosed with severe active ulcerative colitis who were resi...

In this research, optimization of the pulsed gas tungsten arc welding including pulse current, background current, pulse frequency and on time were investigated in welding of non-similar materials of austenitic stainless steel AISI 316L and nickel-base super alloy of Monel 400 by using ERNiCr3 filler metal. In order to obtain optimum conditions of welding the Taguchi method with the L9 array wa...

background: one of the main problems especially in operating room and monitoring devices is measurement of blood pressure (bp) by sphygmomanometer cuff. objective: in this study we designed a new method to measure bp changes continuously for detecting information between cuff inflation times by using vital signals in monitoring devices. this will be achieved by extraction of the time difference...

introduction:  one ofdiagnostic criteria for acute lung injury and acute respiratory distress syndrome is  pao2/fio2 (pf) ratio 300 for ali or 200 for ards. this criteria requires invasive arterial sampling. measurement of spo2/fio2 (sf) ratio by pulseoximetry may be a reliable non invasive alternative to the pf ratio.   methods and materials: in a cross sectional study we enrolled 105 sample o...