Many phenomena such as neuron firing in the brain, the travelling waves which produce the heartbeat, arrythmia and fibrillation in the heart, catalytic reactions or cellular organization activities, among others, can be described by a unifying paradigm based on a class of nonlinear reaction-diffusion mechanisms. The FitzHugh-Nagumo (FHN) model is a simplified version of such class which is know...

Dynamics of FitzHugh-Nagumo (FN) neuron ensembles with time-delayed couplings subject to white noises, has been studied by using both direct simulations and a semianalytical augmented moment method (AMM) which has been proposed in a preceding paper [H. Hasegawa, Phys. Rev. E 70, 021911 (2004)]. For N-unit FN neuron ensembles, AMM transforms original 2N-dimensional stochastic delay differential ...

As the staff of the MRC Laboratory of Molecular Biology settle into their new building in Cambridge, its director Hugh Pelham explains the challenges of living up to its prestigious past.

A hugh episcleral traumatic conjunctival inclusion cyst enveloping almost the whole eye, which appeared in the left phthisical eye of a young woman who sustained a perforating ocular injury a few years before enucleation, is described.

In the 1970s, Joan Birman and Hugh Hilden wrote several papers on problem of relating mapping class group a surface to that covering space. Their results provide bridge between theories groups braid groups. We survey work Hilden, give an overview subsequent developments, discuss open questions new directions.

Ten women with acute right upper-quadrant abdominal pain but negative results for biliary investigations had a current or past history of pelvic inflammatory disease. A diagnosis of the Curtis-Fitz-Hugh syndrome was made and was confirmed in five patients by laparoscopy. Neisseria gonorrhoeae was not isolated from the cervical and urethral swabbings of seven patients tested. Chlamydia trachomat...

Waugh, M.A., M.Chir., F.R.C.S.(Eng.). Fourth Edition. (Pp. viii + 296. 12s. 6d.) London: Bailli6re, Tindall & Cox, 1956. TIlE whole field of orthopadics and fractures is attempted in the two hundred and eighty-six pages of this addition to the Aids Series. It illustrates many of the advantages and not a few of the disadvantages of such "cramming." It is small enough to slip into the jacket pock...

A 45-year-old man was admitted for pain in the upper right abdominal quadrant that had been evolving for months. His previous medical history was unremarkable. The physical examination showed a painful and tense abdomen in the right hypochondrium but the rest was pain free. Biological analysis showed an inflammatory syndrome (C-reactive protein 29.54mg/L). Liver enzymology and urine and blood c...