[1] The motion of mid-latitude surface cyclones relative to the jet streams is of particular interest because of the commonly observed strong and rapid deepening they undergo when they cross the upper-level jet axis. The purpose of the present study is to validate a recent theory that may explain this motion which is a generalization of the so-called beta drift in the mid-latitude baroclinic co...

Jet fans are applied for control of air flow and support of pollutant dispersal in large enclosures. In The Netherlands, application is well known for car parks as part of the fire safety design. In the design phase often the Computational Fluid Dynamics (CFD)-technique is used to verify the fire safety level afforded by the application of jet fans. However, very little is known on the modellin...

Results are presented from analyses of jet data produced in pp collisions at √ s = 630 and 1800 GeV collected with the DØ detector during the 1994–95 Fermilab Tevatron Collider run. We discuss details of detector calibration, and jet selection criteria in measurements of various jet production cross sections at √ s = 630 and 1800 GeV. The inclusive jet cross sections, the dijet mass spectrum, t...

We propose a simple method to simulate W/Z + jet productions at hadron collisions. The simulation can be done by using existing tools with some modifications allowed to users. W/Z + 1 jet events are generated using an ME-based event generator at the tree level. The divergence at low pT is suppressed by using the Sudakov form factor. PS is added with an appropriate consideration for PS-ME matchi...

where dΓ ({p}m) is the phase space integral measure,M({p}m) represents the m-paraton tree level matrix element and FJ({p}m) is the jet measurement function that defines the physical observable. This calculation is relatively simple. The integral free from the infrared and ultraviolet singularities. The matrix element is basically a complicated expression but it can be generated in a automated w...

Numerical simulations of unsteady flow in a Hartmann resonance tube are carried out with the goal of understanding the effect of jet Mach number on the flow characteristics. The device, which consists of a convergent nozzle facing a closed end tube produces a nearly normal shock that fluctuates in the gap between the nozzle and the tube. Numerical solutions were obtained for the unsteady Reynol...