Universal temporal characteristics and vanishing of multifractality in Barkhausen avalanches.

Barkhausen effect in ferromagnetic materials provides an excellent area for investigating scaling phenomena found in disordered systems exhibiting crackling noise. The critical dynamics is characterized by random pulses or avalanches with scale-invariant properties, power-law distributions, and universal features. However, the traditional Barkhausen avalanches statistics may not be sufficient to fully characterize the complex temporal correlation of the magnetic domain walls dynamics.

Segmentation of time series with long-range fractal correlations.

Segmentation is a standard method of data analysis to identify change-points dividing a nonstationary time series into homogeneous segments. However, for long-range fractal correlated series, most of the segmentation techniques detect spurious change-points which are simply due to the heterogeneities induced by the correlations and not to real nonstationarities. To avoid this oversegmentation, we present a segmentation algorithm which takes as a reference for homogeneity, instead of a random i.

Adolescent patient with bilateral crossbite treated with surgically assisted rapid maxillary expansion: a case report evaluated by the 3d laser scanner, and using FESA method.

Our purpose in this case report is to present an orthodontic treatment obtained and the results achieved in 17-year-old white female patient with Angle Class II malocclusion and bilateral posterior crossbite. Patient was treated with bonded acrylic Hyrax appliance and surgically assisted rapid maxillary expansion (SARME). The multiloop system 0.

The suprachiasmatic nucleus functions beyond circadian rhythm generation.

We recently discovered that human activity possesses a complex temporal organization characterized by scale-invariant/self-similar fluctuations from seconds to approximately 4 h-(statistical properties of fluctuations remain the same at different time scales). Here, we show that scale-invariant activity patterns are essentially identical in humans and rats, and exist for up to approximately 24 h: six-times longer than previously reported. Theoretically, such scale-invariant patterns can be produced by a neural network of interacting control nodes-system components with feedback loops-operating at different time scales.

Steady-state visual evoked potentials and phase synchronization in migraine patients.

We investigate phase synchronization in EEG recordings from migraine patients. We use the analytic signal technique, based on the Hilbert transform, and find that migraine brains are characterized by enhanced alpha band phase synchronization in the presence of visual stimuli. Our findings show that migraine patients have an overactive regulatory mechanism that renders them more sensitive to external stimuli.

Gastroprotective effect of MX1 (a novel salt of the active metabolite of roxatidine with a complex of bismuth and citric acid) against stress ulcers in rats.

We have studied the effect of the newly synthesized agent MX1, a salt of the active metabolite of the H2-blocker roxatidine with a complex of bismuth and citric acid (N-[3-(3-(1-piperidinylmethyl)phenoxy)propyl]-hydroxyacetamide+ ++ -2-hydroxypropane-1,2,3-tricarboxilate-bismuth(3+) complex), against restraint stress ulcers in rats (24 h immobilization). The effects of MX1 (12.5, 50, 125, 184 and 250 mg kg-1) were compared with the effects of equimolar doses of roxatidine (6.

[The effects of compound IZ35 on the beta-adrenergic mediator system].

The biological activity of the compound Iz35, representing rigid conformer of triquinol in respect to the cardiovascular system and smooth musculature, was studied. The arterial blood pressure and heart frequency were recorded in cats and rabbits as well as the tonus of smooth musculature of bronchial tree, uterus and intestines in experiments in vivo and in vitro of rats, guinea pigs and rabbits. It was established that the compound Iz35, administered in a wide range of doses of 0.

1,4-Benzodiazepines. VIII - Central depressive activity and spasmolytic action of isoquino-[2,1-d] [1,4] benzodiazepines. Structure-activity relationships.

The pharmacological activity of four new groups of isoquino [2,1-d] ((1,4]benzodiazepines, i.e. the 6-oxo-12,13-dimethoxy-5H-7H--9,10-dihydroisoquino [2,1-d] [1,4]benzodiazepinium bromides (I); 5,9,10,14b--tetrahydroisoquino [2,1-d] [1,4]benzodiazepin-7H-6-ones (II); 6-phenyl-12,13--dimethoxy-7,9,10,14b-tetrahydroisoquino [2,1-d] [1,4]benzodiazepines (III) and 6-phenyl-12,13-dimethoxy-7H-9,10-dihydroisoquino [2,1-d] [1,4]benzodiazepinium bromides (IV) was studied.