The flow characteristics of propellant gases inside the gas cylinder weapon gas-operated mechanism, applied to UK-59 machine gun, are studied. Computational Fluid Dynamics (CFD) in ANSYS Fluent is used for simulation through port from barrel bore and back. study's findings presented along with piston law motion thermodynamic quantities cylinder, specifically pressure, temperature, velocity dist...

OBJECTIVE To determine whether pediatricians accurately estimate the likelihood of gun ownership among their patients' families. Design. Self-administered, written surveys completed simultaneously by pediatricians and their patients' parents. SETTING A total of 23 pediatric practices and hospital-based clinics in three cities in the United States. SUBJECTS A total of 66 pediatricians paired...

The phase state prediction methods of condensate gas are relatively mature, but the effect changes on gas–liquid mixture flow behavior and liquid-carrying capacity has not been researched in detail. This study applied PIPESIM software to predict fluid properties under different development stages a reservoir Shengli Oilfield determined diagram physical well stream basis optimized equation (EOS)...

In view of the recent work which has been done by Davisson and Ger-mer,l G. P. Thomson,2 and others in investigating the angular scattering of electrons by crystals, and the work of E. G. Dymond3 in extending these investigations to the scattering of electrons by helium, it was.thought worthwhile to see if similar results could be obtained for this-scattering by other monatomic and diatomic gas...

Gibberellins (GAs) in suspensors and embryos of Phaseolus coccineus seeds at the heart stage of embryo development were analyzed by combined gas chromatography-mass spectrometry (GC-MS). From the suspensor four C(19)-GAs, GA(1), GA(4), GA(5), GA(6), and one C(20) GA, GA(44), were identified. From the embryo, five C(19)-GAs GA(1), GA(4), GA(5), GA(6), GA(60) and two C(20) GAs, GA(19) and GA(44) ...

INTRODUCTION Firearm violence injures or kills 100,000 Americans each year. This paper applies the Host-Agent-Vector-Environment model to this issue. Research on firearm violence tends to focus on two elements-the host (i.e., victims of firearm violence) and the environment (i.e., gun policies)-but little attention has been paid to the agent (the gun and ammunition) or the vector (firearm manuf...

DNA-raised antibody (Ab) responses have been compared for the dependence on CD4+ and CD8+ cells, the longevity of functional antigen (Ag) expression, and the nature of the Ag-presenting cell after intramuscular (i.m.) and gene gun inoculations. A plasmid expressing the hemagglutinin (HA) glycoprotein of influenza virus was used for immunizations of BALB/c mice. Intramuscular and gene gun-raised...

Conventional multiple imputation (MI) (Rubin, 1987) replaces the missing values in a dataset by m > 1 sets of simulated values. We describe a two-stage extension of MI in which the missing values are partitioned into two groups and imputed N = mn times in a nested fashion. Two-stage MI divides the missing information into two components of variability, lending insight when the missing values ar...