Abstract The Ricci curvature criterion is used for the investigation of the relative instability of several configurations of N-body gravitating systems. It is shown, that the systems with double massive centers are more unstable than the homogeneous systems and those with one massive center. In general this shows the efficiency of the Ricci curvature method introduced by Gurzadyan and Kocharya...

BACKGROUND Primary total hip arthroplasty leads to better functional capacities but a general weakness of abductor muscles often persists. A larger head component may improve the postural balance in the medial-lateral direction. The aims of this study are (1) to compare postural stability in patients after total hip and surface replacement arthroplasties and (2) to evaluate the effect of the bi...

Whenever there is a time delay in a dynamical system, the study of stability becomes an infinite-dimensional problem. The centre manifold theorem, together with the classical Hopf bifurcation, is the most valuable approach for simplifying the infinite-dimensional problem without the assumption of small time delay. This dimensional reduction is illustrated in this paper with the delay versions o...

While walking on a treadmill, 20 subjects experienced lateral oscillations: frequencies from 0.5 to 2 Hz and velocities from 0.05 to 0.16 m s(- 1) rms. Postural stability was indicated by ratings of 'discomfort or difficulty in walking', the movement of the centre of pressure beneath the feet and lateral forces applied to a hand support. Hand support improved postural stability with all frequen...

‎motivated by a celebrated theorem of schur‎, ‎we show that if~$gamma$ is a normal subgroup of the full automorphism group $aut(g)$ of a group $g$ such that $inn(g)$ is contained in $gamma$ and $aut(g)/gamma$ has no uncountable abelian subgroups of prime exponent‎, ‎then $[g,gamma]$ is finite‎, ‎provided that the subgroup consisting of all elements of $g$ fixed by $gamma$ has finite index‎. ‎so...

Angle stability appears in many forms transmission network. There are small active power oscillations which do not endanger the normal operations whereas medium and large have implications on operations. These latter kinds of some cases develop out step condition, is dangerous disturbance with serious impact network generating units. Transmission operator’s challenges obligations to treat right...

A Novel DNA Repair Disorder With Thrombocytopenia, Nephrosis, and Features Overlapping Cockayne Syndrome Elizabeth Forsythe, Ruth Wild, Gabrielle Sellick, Richard S. Houlston, Alan R. Lehmann, and Emma Wakeling* Kennedy Galton Centre, North West Thames Regional Genetics Service, The North West London Hospitals NHS Trust, Middlesex, United Kingdom Section of Cancer Genetics, Institute of Cancer ...

Modulation of Nto C-terminal interactions enhances protein stability. Mahanta P, Bhardwaj A, Kumar K, Reddy V S, Ramakumar S* Department of Physics, Indian Institute of Science, Bangalore-560012; Plant Transformation Group, International Centre for Genetic Engineering and Biotechnology, New Delhi-110067; Present address, Department of Pathology, Kimmel Centre for Biology and Medicine at the Ski...