This experimental study demonstrates the efficiency of simple control strategies to damp a 3-stage tensegrity tower structure. The tower is mounted on a moving support which is excited with a limited bandwidth random signal (filtered white noise) by a shaker. Our goal is to minimize the transmissibility between base acceleration and top plate acceleration using piezoelectric displacement actuat...

The epidemiology and impact of animal African trypanosomosis is influenced by the transmissibility and the pathogenicity of the circulating trypanosome strains in a particular biotope. The transmissibility of 22 T. congolense strains isolated from domestic and wild animals was evaluated in a total of 1213 flies. Multivariate mixed models were used to compare infection and maturation rates in fu...

H5N1 highly pathogenic avian influenza virus (HPAIV) of clade 2.3.2 has been circulating in waterfowl in Southern China since 2003. Our previous studies showed that certain H5N1 HPAIV isolates within clade 2.3.2 from Southern China had high pathogenicity in different birds. Guinea pigs have been successfully used as models to evaluate the transmissibility of AIVs and other species of influenza ...

This study focusses on the vibration transmission and energy flow characteristics of low dimensional models dynamical systems with Coulomb friction. The Karnopp friction model smooth are employed to estimate dry force. steady-state responses system determined by harmonic balance (HB) approximations numerical continuations a time-marching method. level dissipation within assessed force transmiss...

Waning immunity could allow transmission of polioviruses without causing poliomyelitis by promoting silent circulation (SC). Undetected SC when oral polio vaccine (OPV) use is stopped could cause difficult to control epidemics. Little is known about waning. To develop theory about what generates SC, we modeled a range of waning patterns. We varied both OPV and wild polio virus (WPV) transmissib...

The nature of the amino acids in the N-terminal 'DAGX' motif of the coat protein of tobacco vein mottling virus (TVMV) that have a direct effect on aphid transmissibility of the virion were further defined by site-directed mutagenesis. In the first position of the DAGX motif, Asp or Asn are required for aphid transmissibility. In the second position, the nonpolar residue Ala, but not the nonpol...

Pseudorecombinant isolates produced from an efficiently transmitted and a non-transmitted isolate of tobacco rattle tobravirus were tested for their transmissibility by trichodorid vector nematodes. Isolates with RNA-2 originating from the non-transmissible isolate were not transmitted by the vector, whereas isolates with RNA-2 originating from the efficiently transmitted isolate were transmitt...

Abstract Introduction To improve the low frequency isolation capability of vibration system, a kind electromagnetic quasi-zero-stiffness (QZS) isolator was designed. Materials and methods The negative stiffness spring paralleled with linear positive to achieve state QZS. nonlinear dynamic model established. Through combination theoretical formula simulation analysis, force expression obtained. ...

The seat suspension has a significant influence on riding comfort in many practical applications, such as heavy duty vehicles, military and high-speed crafts. This paper proposes equipped with variable equivalent inertance-variable damping (VEI–VD) device novel semi-active vibration control strategy. VEI–VD can its inertance by controlling two external resistors electric circuit. Especially, th...