The formation of the dorso-ventral body pattern of Drosophila involves the restricted activation of a serine protease cascade in the extracellular space between the egg shell and the embryo. Now, the first molecular links have been identified between ventral gene expression during oogenesis and the activation of the protease cascade in the early embryo.

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Abstract We present a simple computer simulation model for the interaction of automatic guns with unarmed drones. Each drone is represented as rigid body that consists several bodies such parallelepipeds, ellipsoids, etc. The simplified spatial trajectory constructed using third-order Bezier curves. A relatively large group unconnected drones may be simulated in computationally fast way this me...

A rectangular communication grid model was constructed in the form of a colored Petri net as a composition of submodes of terminal devices producing and consuming packets and communication devices switching packets for their delivery among terminal devices. The model was supplied with traffic guns simulating ill-intentioned traffic. Via simulation in CPN Tools it was shown that a traffic duel o...

Pneumatically powered nail guns have been used in construction since 1959. Penetrating injuries to the heart with nail guns have a wide range of presentations from asymptomatic to cardiac tamponade and exsanguination. Mortality related to cardiac nail gun injuries is similar to knife injuries, estimated at 25%. Surgical exploration is the treatment of choice. We describe a case of self-inflicte...

In the past few years our national consciousness has been altered by haunting images of mass slaughters in American high schools, carried out by troubled young boys with guns. It's now clear that no matter where we live or how hard we try as parents, our children are likely to be going to school with boys who are capable of getting guns and pulling triggers. What has caused teen violence to spr...

An experiment (N = 28) tested the hypothesis that the mere visual perception of disease-connoting cues promotes a more aggressive immune response. Participants were exposed either to photographs depicting symptoms of infectious disease or to photographs depicting guns. After incubation with a model bacterial stimulus, participants' white blood cells produced higher levels of the proinflammatory...

A popular proxy for gun ownership is the fraction of suicides from firearms. This has made identifying the causal effect of guns on suicide difficult. In this article, firearm background checks are used as a proxy for changes in gun ownership rates, allowing the effect of guns on suicide to be identified. The results from panel data regressions show that increases in firearm background checks r...