Publisher Correction: Wave kinetics of random fibre lasers.

This corrects the article DOI: 10.1038/ncomms7214.

Wave kinetics of random fibre lasers.

Traditional wave kinetics describes the slow evolution of systems with many degrees of freedom to equilibrium via numerous weak non-linear interactions and fails for very important class of dissipative (active) optical systems with cyclic gain and losses, such as lasers with non-linear intracavity dynamics. Here we introduce a conceptually new class of cyclic wave systems, characterized by non-uniform double-scale dynamics with strong periodic changes of the energy spectrum and slow evolution from cycle to cycle to a statistically steady state. Taking a practically important example-random fibre laser-we show that a model describing such a system is close to integrable non-linear Schrödinger equation and needs a new formalism of wave kinetics, developed here. We derive a non-linear kinetic theory of the laser spectrum, generalizing the seminal linear model of Schawlow and Townes. Experimental results agree with our theory. The work has implications for describing kinetics of cyclical systems beyond photonics.

[The effect of a paravertebral novocaine block on acid formation in the stomach]. / Vliianie paravertebral'noi novokainovoi blokady na kislotoobrazovanie v zheludke.

The dependence of acid-formation in the stomach on the blockade of sympathetic innervation of the acid-formation area was investigated in 38 patients in whom the paravertebral novocaine blockade was made at the ThVII-ThIX level in order to cup off the pain syndrome. The control group included 7 patients without diseases of the organs of the hepato-pancreatico-duodenal zone. This blockade was found to sharply increase the basal acid-formation in healthy people. In patients with the high acid-formation it leads to greater elevation of acidity. It was shown that the disturbed functional balance between two parts of the vegetative nervous system responsible for the acid-formation function of the stomach was one of the causes of higher acid formation in patients with peptic ulcer of the gastroenterostomy and with chronic ulcer of the duodenum. It seems to be reasonable to investigate disturbances of the function of sympathetic innervation of the acid-formation area of the stomach for determining the optimum volume of surgical interventions in such patients.

[Reaction of the autonomic nervous system of children to a magnetic field]. / Reaktsiia vegetativnoi nervnoi sistemy detskogo organizma na vozdeistvie magnitnogo polia.

A study was made of some reactions of the child's body to the magnetic field action with the aid of thermography, investigation of the parameters of vegetative functions and determination of the changes in the amount of the formed elements of white blood in 20 normal children and 20 patients aged 6-15 years suffering from chronic gastroduodenal diseases. It has been established that the changes in infrared radiation on the surface of the anterior abdominal wall in the patients mirror the adequacy of the compensatory reactions of the vegetative nervous system to the magnetic field action. The parameters of the function of the vegetative nervous system, mainly those of its sympathetic part, are indicative of the effect of the magnetic field on the patient's body.

[Diagnostic value of thermography in diseases of the vessels of the lower extremities]. / Diagnosticheskie vozmozhnosti teplovideniia pri zabolevaniiakh sosudov nizhnikh konechnostei.

The thermographic examinations of 430 patients with different diseases of the lower extremity vessels have confirmed the diagnostic value of thermography. The method was shown to give the objective assessment of alterations in blood circulation of the lower extremity resulting from a pathological process. It may be widely used for diagnosis and control of treatment of vascular diseases.