170,633 research outputs found
C. H. Sherrington: Experimentation on Emotion. Nature (2. Aug.), 328-330. 1900
No full textC. H. SHERRINGTON: EXPERIMENTATION ON EMOTION. NATURE (2. AUG.), 328-330. 1900
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (-)
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (27) (a0001)
C. H. Sherrington: Experimentation on Emotion. Nature (2. Aug.), 328-330. 1900 (27) (p0132
Dynamics of neural networks and disordered spin systems
Full text linkI obtain a number of results for the dynamics of several disordered spin systems, of successively greater complexity. I commence with the generalised Hopfield model trained with an intensive number of patterns, where in the thermodynamic limit macroscopic, deterministic equations of motion can be derived exactly for both the synchronous discrete time and asynchronous continuous time dynamics. I show that for symmetric embedding matrices Lyapunov functions exist at the macroscopic level of description in terms of pattern overlaps. I then show that for asymmetric embedding matrices several types of bifurcation phenomena to complex non-transient dynamics occur, even in this simplest model. Extending a recent result of Coolen and Sherrington, I show how the dynamics of the generalised Hopfield model trained with extensively many patterns and non-trivial embedding matrix can be described by the evolution of a small number of overlaps and the disordered contribution to the 'energy', upon calculation of a noise distribution by the replica method. The evaluation of the noise distribution requires two key assumptions: that the flow equations are self averaging, and that equipartitioning of probability occurs within the macroscopic sub-shells of the ensemble. This method is inexact on intermediate time scales, due to the microscopic information integrated out in order to derive a closed set of equations. I then show how this theory can be improved in a systematic manner by introducing an order parameter function - the joint distribution of spins and local alignment fields, which evolves in time deterministically, according to a driven diffusion type equation. I show how the coefficients in this equation can be evaluated for the generalised Sherrington-Kirkpatrick model, both within the replica symmetric ansatz, and using Parisi's ultrametric ansatz for the replica matrices, upon making once again the two key assumptions (self averaging and equipartitioning). Since the order parameter is now a continuous function, however, the assumption of equipartitioning within the macroscopic sub-shells is much less restricting
Physiotherapy in the prevention of falls in older people
No full text[Sherrington C, Tiedemann A (2015) Physiotherapy in the prevention of falls in older people. Journal of Physiotherapy 61: 54–60
Thomas, F.-W. Mott et C.-S. Sherrington, H. Charlton Bastian, Coordination des mouvements et ataxie.
No full textBinet Alfred. Thomas, F.-W. Mott et C.-S. Sherrington, H. Charlton Bastian, Coordination des mouvements et ataxie.. In: L'année psychologique. 1895 vol. 2. pp. 594-598
C. S. Sherrington: Experiments on the Value of Vascular and Visceral Factors for the Genesis of Emotion. Proceed. of the Royal Society 66, 390-403. 1900
No full textC. S. SHERRINGTON: EXPERIMENTS ON THE VALUE OF VASCULAR AND VISCERAL FACTORS FOR THE GENESIS OF EMOTION. PROCEED. OF THE ROYAL SOCIETY 66, 390-403. 1900
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (-)
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (37) (a0001)
C. S. Sherrington: Experiments on the Value of Vascular and Visceral Factors for the Genesis of Emotion. Proceed. of the Royal Society 66, 390-403. 1900 (37) (p0397
The Sherrington-Kirkpatrick model near <i>T<sub>c</sub></i> and near <i>T=0</i>
No full textInternational audienceSome recent results concerning the Sherrington-Kirkpatrick model are reported. For T near the critical temperature Tc, the replica free energy of the Sherrington-Kirkpatrick model is taken as the starting point of an expansion in powers of δQab = (Qab - QabRS) about the Replica Symmetric solution QabRS. The expansion is kept up to 4-th order in δQ where a Parisi solution Qab = Q(x) emerges, but only if one remains close enough to Tc. For T near zero we show how to separate contributions from x " T " 1 where the Hessian maintains the standard structure of Parisi Replica Symmetry Breaking with bands of eigenvalues bounded below by zero modes. For T " x ≤ 1 the bands collapse and only two eigenvalues, a null one and a positive one, are found. In this region the solution stands in what can be called a droplet-like regime
F. W. Mott u. C. S. Sherrington: Experiments upon the Influence of Sensory Nerves upon Movement and Nutrition of the Limbs. Proceedings Roy. Soc. Vol. LVII. No. 345. S. 481-488. 1895
No full textF. W. MOTT U. C. S. SHERRINGTON: EXPERIMENTS UPON THE INFLUENCE OF SENSORY NERVES UPON MOVEMENT AND NUTRITION OF THE LIMBS. PROCEEDINGS ROY. SOC. VOL. LVII. NO. 345. S. 481-488. 1895
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (-)
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (12) (a0003)
F. W. Mott u. C. S. Sherrington: Experiments upon the Influence of Sensory Nerves upon Movement and Nutrition of the Limbs. Proceedings Roy. Soc. Vol. LVII. No. 345. S. 481-488. 1895 (12) (p0288
Special issue in honour of Prof. David C. Sherrington FRS. Functional polymers between chemistry and applications
No full textThis special issue of Reactive and Functional Polymers was commissioned to honour the life and works of Professor David C. Sherrington FRS, and to recognize the numerous seminal contributions which he has made to the field of polymer chemistry over the course of his long and illustrious career. A broad range of polymer chemistry subjects is presented in this special issue, which is a reflection of Dave’s own diverse research interests in polymer and materials science. Many of the contributions are from long-term friends and collaborators
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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