BACKGROUND Dysregulated respiratory control may play a role in the pathophysiology of panic disorder. This could be due to abnormalities in brain stem respiratory nuclei or to dysregulation at higher brain levels. Results from previous studies using the doxapram model of panic have yielded an unclear picture. A brief cognitive manipulation reduced doxapram-induced hyperventilation in patients, ...

Resonance of railway bridges is a matter major concern in high-speed railways because it reduces riding comfort, damages the attached structures, and decreases strength girder bodies. Although this abnormal behavior can be inspected using situ displacement measurements taken from ground, its investigation tedious and, consequently, very expensive. In study, authors developed novel drive-by syst...

In this paper, we define a new concept of factorization for a bounded bilinear mapping $f:Xtimes Yto Z$, depended on  a natural number $n$ and a cardinal number $kappa$; which is called $n$-factorization property of level $kappa$. Then we study the relation between $n$-factorization property of  level $kappa$ for $X^*$ with respect to $f$ and automatically boundedness and $w^*$-$w^*$-continuity...

A theory is presented for retrieving the track/bridge frequencies and track modulus from an instrumented vehicle moving over a dual-beam model to simulate track-bridge system. The dual beams are connected by uniform spring-dashpot units effects of sleepers ballast, etc. Based on model, response firstly derived in closed form, along with that vehicle-track contact point. solved relate bridge fre...

A subway train-steel spring floating slab track-tunnel coupling dynamic model, considering short and middle-long wavelength random track irregularities, and longitudinal connection between adjacent slabs of steel spring floating slab track, was developed. And the influence of slab length on dynamic characteristics of the system under different track conditions and train speeds are theoretically...

Background: In order to study the applicability of Low Vibration Track (LVT) in heavy-haul railway tunnels, this paper carried out research on dynamic effects LVT wheels and rails provided a technical reference for structural design track structures. Methods: Based system dynamics response sensitivity vehicle-track coupling dynamics, stability upper train, deformation tendency, under influence ...