An improved theoretical approach is proposed to predict the dynamic behavior of long, slender and flexible microcantilevers affected by squeeze-film damping at low ambient pressures. Our approach extends recent continuum gas damping models (Veijola 2004 J. Micromech. Microeng. 14 1109–18, Gallis and Torczynski 2004 J. Microelectromech. Syst. 13 653–9), which were originally derived for a rigid ...

eepening Nigeria‘s financial markets is a key component of economic diversification and job creation. An efficient and functioning market for credit will stimulate business activity and support Nigeria‘s dynamic entrepreneurs. There is a prevalent feeling that following the banking sector crisis which erupted in August 2009, this process has stalled as commercial banks have curtailed their lend...

The melt of V-modified A380 alloy aluminum was treated by compound field ultrasonic vibration (UV) and electromagnetic stirring (ES) around liquidus temperatures. Then the high pressure rheo-squeeze casting (HPRSC) process used to produce an ingot with obtained. results indicate that polygonal Si2V phase is precipitated after adding vanadium alloy. With increasing V content from 0 1.05%, averag...

Background Hip adductor muscle weakness and a history of groin injury both have been identified as strong risk factors for sustaining a new groin injury. Current groin pain and age have been associated with hip adductor strength. These factors could be related, but this has never been investigated. Purpose To investigate whether soccer athletes with past-season groin pain and with different d...

In this study, SiCp particles were reinforced at volumetric ratios of 5%, 10%, 15% and 20% into the EN AW 5756 (AlMg3) metal matrix composite by using squeeze casting method. The squeezing process was carried out for 10 seconds under a pressure 80 MPa. changes in wear behaviors friction coefficients 5754/SiCp samples examined under1.0 N force, 5000 cycles with 0.04 m/s sliding speed. As result ...

We present a 1D theory, neglecting radial dependency, for the damping of cylindrically symmetric plasma modes due to a cylindrically symmetric squeeze potential Vsq(z), applied to the axial midpoint of a non-neutral plasma column. Inside the plasma, particles experience a much smaller, Debye shielded squeeze potential φ0(z) of magnitude φs. Squeeze divides the plasma into passing and trapped pa...