Huerta et al. [Phys. Rev. Research 2, 033351 (2020)] report a power-law decay of positional order in numerical simulations hard disks confined within parallel walls, which they interpret as Kosterlitz-Thouless (KT)-type caging-uncaging transition. The proposed existence such transition quasi-one-dimensional system, however, contradicts long-held physical expectations. To clarify if the ordering...

The driving mechanism of an axisymmetric vectoring exhaust nozzle (AVEN) is a 3-degrees-of-freedom (3-DOF) parallel manipulator (PM) with centering device. According to the characteristics nozzle’s movement mechanism, 3-DOF kinematics model 3SPS + 3PRS PM established. forward and inverse positional posture models are built based on architecture closed-loop vector method. Jacobian matrix Hessian...

BACKGROUND The Dix-Hallpike manoeuvre is performed for diagnosis and the Epley manoeuvre used for treatment of posterior canal benign paroxysmal positional vertigo (BPPV). However, musculoskeletal conditions may restrict utility of these manoeuvres. OBJECTIVE The Semont and liberatory manoeuvres are described in this article. These manoeuvres are simple and highly effective for the diagnosis ...

The ob gene was cloned in 1994 using the methodology of positional cloning. Leptin, the protein encoded by the ob gene, was identified in 1995 and shown to be a hormonal signal that regulates energy balance.14 Since its discovery 15 years ago, 30,943 articles on leptin have been written (S Korres, personal communication, 2009), providing an opportunity to assess, with some hindsight, the impact...