158 research outputs found

    The Coronal Analysis of SHocks and Waves (CASHeW) Framework

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    Coronal Bright Fronts (CBF) are large-scale wavelike disturbances in the solar corona, related to solar eruptions. They are observed in extreme ultraviolet (EUV) light as transient bright fronts of finite width, propagating away from the eruption source. Recent studies of individual solar eruptive events have used EUV observations of CBFs and metric radio type II burst observations to show the intimate connection between low coronal waves and coronal mass ejection (CME)-driven shocks. EUV imaging with the Atmospheric Imaging Assembly(AIA) instrument on the Solar Dynamics Observatory (SDO) has proven particularly useful for detecting CBFs, which, combined with radio and in situ observations, holds great promise for early CME-driven shock characterization capability. This characterization can further be automated, and related to models of particle acceleration to produce estimates of particle fluxes in the corona and in the near Earth environment early in events. We present a framework for the Coronal Analysis of SHocks and Waves (CASHeW). It combines analysis of NASA Heliophysics System Observatory data products and relevant data-driven models, into an automated system for the characterization of off-limb coronal waves and shocks and the evaluation of their capability to accelerate solar energetic particles (SEPs). The system utilizes EUV observations and models written in the Interactive Data Language (IDL). In addition, it leverages analysis tools from the SolarSoft package of libraries, as well as third party libraries. We have tested the CASHeW framework on a representative list of coronal bright front events. Here we present its features, as well as initial results. With this framework, we hope to contribute to the overall understanding of coronal shock waves, their importance for energetic particle acceleration, as well as to the better ability to forecast SEP events fluxes.Comment: Accepted for publication in the Journal of Space Weather and Space Climate (SWSC

    Use of Long Pulse Nd:YAG 1064nm Laser for Treatment of Rosacea Telangiectatica

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    ABSTRACT A clinical study was performed in which 23 female patients were treated with long pulse Nd:YAG laser light (DualisSP, Fotona, Slovenia) for rosacea teleangiectatica. Patients were treated in one, two or three sessions, depending on facial telangiectasia clearance success. The time interval between sessions was 6 weeks. Treatment parameters were set according to the treated vessel size and depth. Fluences between 160 and 210 J/cm 2 and pulse durations between 10 and 15 msec were used. The therapy was performed without any anesthesia, only cold air cooling was used for pain reduction. The pain level was measured with a 10 grade visual analogue scale (VAS). Results of telangiectasia clearance were evaluated on a four grade scale (poor, moderate, good and excellent) 3 months after the last treatement session. All patients experienced marked improvement of rosacea, among them 13 patients had excellent cleareance, 8 good and 2 moderate clearance. The treatments were well tolerated and there were no severe side effects. Three patients had hyperpigmentation and one prolonged erythema, which were all transient

    FREE RADICAL OXIDATION AND ERYTHROCYTE AGGREGATION AFTER THERMIC INJURY EFFECT OF ALPHATOCOPHEROL

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    EFFECT OF LIPID PEROXIDE OXIDATION ON ERYTHROCYTE FLEXIBILITY IN BURNS AND ALPHA-TOCOFEROL TREATMENT

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    PLATELET AGGREGATION AFTER EXPERIMENTAL BURN INJURY AND THERAPY

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    Based on data concerning the coagulation changes after thermal injury the authors studied platelet aggregation after burn and its treatment. Severe thermal injury of Ha and lib degree was inflicted in white male rats (200 ±20 g b. m.) under aether anaesthesia. It ranged over 17,5 ± 2,5 % of the body surface. The animals were divided into the following groups: 1) burned non-treated; 2) burned and treated with Sol. Hartmanni (Hr), 3) burned and treated with Hemodex (Hx), and 4) controls. The treatment was intraperitoneally carried out immediately after the injury as well as on 6th and 24th hour after it. An elevation of the platelet aggregation for all the groups on the 24th hour after the injury was established

    Closed-Loop Statistical Verification of Stochastic Nonlinear Systems Subject to Parametric Uncertainties

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    This paper proposes a statistical verification framework using Gaussian processes (GPs) for simulation-based verification of stochastic nonlinear systems with parametric uncertainties. Given a small number of stochastic simulations, the proposed framework constructs a GP regression model and predicts the system's performance over the entire set of possible uncertainties. Included in the framework is a new metric to estimate the confidence in those predictions based on the variance of the GP's cumulative distribution function. This variance-based metric forms the basis of active sampling algorithms that aim to minimize prediction error through careful selection of simulations. In three case studies, the new active sampling algorithms demonstrate up to a 35% improvement in prediction error over other approaches and are able to correctly identify regions with low prediction confidence through the variance metric.Comment: 8 pages, submitted to ACC 201

    ALPHA-TOCOPHEROL STABILIZES ERYTHROCYTE MEMBRANE DURING THE EARLY STAGE AFTER THERMAL TRAUMA

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    Standard thermal trauma of 3rda - 3rdb degree, of 15-20 per cent of body surface was induced on white male Wistar rats narcotized with thiopental The changes of the concentration of thioharhituric acid (TBA)- reactive products, the activity of some antioxidant enzymes such as superoxide dismutase (SOD), glucose-6-phosphate dehydrogenase (G-6-PD), and catalase as well as the percentage of haemolysis were investigated during the early post-burn period (24, 48, and 72 hours after burning). It was demonstrated that erythrocyte haemolysis increased along with activation of lipid peroxidation (LPO) after thermic injury. Alpha-tocopherol treatment in a dose of 20 mg/kg body mass reduced the elevated levels of TBA-reactive products and enhanced erythrocytic antioxidant defence and resistance. It could be clarified that LPO activation played an important role in the haemolysis and that alpha-tocopherol stabilized erythrocyte membrane after burns

    SOME THROMBOCYTIC AND ERYTHROCYTIC PARAMETERS AFTER BURNING (EXPERIMENTAL INVESTIGATIONS)

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