There is still no exact theoretical description of the conditions for coalescence pulsating air bubbles in a liquid, based on complete (non-linearized) equations hydrodynamics. A satisfactory mathematical model describing mutual interaction air-guns forming an array should be tailored to dynamics pulse chambers. The paper considers liquid resulting from exhaust compressed during operation air-g...

Gun violence is a leading cause of premature deaths in the United States. Evidence has linked higher levels of firearm ownership to an increased risk for violent crimes perpetrated with a firearm. Given that connection, the goal of this study is to use mathematical modeling techniques to better understand how different social conditions may impact gun-ownership rate. To accomplish that goal, we...

OBJECTIVE Racism is related to policies preferences and behaviors that adversely affect blacks and appear related to a fear of blacks (e.g., increased policing, death penalty). This study examined whether racism is also related to gun ownership and opposition to gun controls in US whites. METHOD The most recent data from the American National Election Study, a large representative US sample, ...

This paper provides new estimates of the effect of household gun prevalence on homicide rates, and infers the marginal external cost of handgun ownership. The estimates utilize a superior proxy for gun prevalence, the percentage of suicides committed with a gun, which we validate. Using countyand state-level panels for 20 years, we estimate the elasticity of homicide with respect to gun prevale...

This paper examines the merit of two propositions at the center of the debate on gun control in the aftermath of mass shootings in the United States: (1) gun violence and mass shootings are a cultural artifact (gun enthusiast perspective); (2) gun violence and mass shootings are more prevalent due to lax regulations (pro-gun control perspective). To evaluate the value of each proposition, the s...

purpose: to present a case of chorioretinitis sclopetaria with attached retina in spite of performing deep vitrectomy without retinopexy. patient and findings: a 10-year-old boy was reffered due to air-gun injury to the left eye. right eye had visual acuity of 20/16, mg-, and normal slit lamp examination and fundoscopy. in the left eye, visual acuity was count fingers at 50 cm, mg+++, anterior ...