Using the degeneration formula for Doanldson-Thomas invariants, we proved formulae for blowing up a point and simple flops.

in their valuable discussion of whistleblowing in healthcare organisations, mannion and davies highlight the importance of organisational culture in influencing whether people raise concerns, and whether these concerns are listened to and acted upon. the role of leadership in shaping organisational culture is well-established1 and in this commentary, we will examine the influence of leaders in ...

Compensated cardiac patients, like normal subjects, on performing the Valsalva maneuver show a decrease in systolic, diastolic, and pulse pressures during the blowing effort and a characteristic hy-pertensive overshoot after the release of the strain. Cardiac patients in congestive failure show the "failure response" with a maintenance of the systolic, diastolic, and pulse pressures during the ...

An analysis is made of the flow of an incompressible viscoelastic fluid (of small memory) over a porous plate subject to suction or blowing. It is found that velocity at a point increases with increase in the elasticity in the fluid. It is also shown that wall shear stress depends only on suction and is also independent of the material of fluids. No steady solution for velocity distribution exi...

Results are reported on the modification of the wing download due to a rotor wake interaction, using surface blowing. Previously, the wake/wing interaction flowfield has been studied qualitatively and quantitatively using surface pressure fields and off-surface velocity fields. The development of spanwise flows had been shown, along with the effects on surface pressure and download and when a t...

Direct numerical simulations are used to investigate the method of film cooling in a laminar flat-plate Mach-2.67 boundary layer. Air is employed as mean-flow and coolant gas and is introduced into the boundary layer through one row of holes by means of a modeled blowing approach. The effects of a favorable streamwise pressure gradient are investigated for two different blowing rates and an adi...

Stapes fractures are usually seen in association with tympanic membrane rupture as a result of direct injury or with major skull trauma. However, barotrauma such as blowing the nose is a rare cause of stapes fractures. Furthermore, fracture of the posterior crus is extremely rare. To our knowledge, the combination of a perilymph fistula and acute mastoiditis has not been previously reported.. W...

Outflows from active galactic nuclei (AGNs) seem to be common and are thought to be important from a variety of perspectives: as an agent of chemical enhancement of the interstellar and intergalactic media, as an agent of angular momentum removal from the accreting central engine, and as an agent limiting star formation in starbursting systems by blowing out gas and dust from the host galaxy. T...