Multipoint Detection of GRB221009A’s Propagation through the Heliosphere

We present the results of processing the effects of the powerful gamma-ray burst GRB221009A captured by the charged particle detectors (electrostatic analyzers and solid-state detectors) on board spacecraft at different points in the heliosphere on 2022 October 9. To follow the GRB221009A propagation through the heliosphere, we used the electron and proton flux measurements from solar missions Solar Orbiter and STEREO-A; Earth’s magnetosphere and solar wind missions THEMIS and Wind; meteorological satellites POES15, POES19, and MetOp3; and MAVEN—a NASA mission orbiting Mars. GRB221009A had a structure of four bursts: the less intense Pulse 1—the triggering impulse—was detected by gamma-ray observatories at T 0 = 13:16:59 UT (near the Earth); the most intense Pulses 2 and 3 were detected on board all the spacecraft from the list; and Pulse 4 was detected in more than 500 s after Pulse 1. Due to their different scientific objectives, the spacecraft, whose data were used in this study, were separated by more than 1 au (Solar Orbiter and MAVEN). This enabled the tracking of GRB221009A as it was propagating across the heliosphere. STEREO-A was the first to register Pulse 2 and 3 of the GRB, almost 100 s before their detection by spacecraft in the vicinity of Earth. MAVEN detected GRB221009A Pulses 2, 3, and 4 at the orbit of Mars about 237 s after their detection near Earth. By processing the observed time delays, we show that the source location of the GRB221009A was at R.A. 288.°5, decl. 18.°5 ± 2° (J2000)

Probability of relativistic electron trapping by parallel and oblique whistler-mode waves in Earth's radiation belts

International audienceWe investigate electron trapping by high-amplitude whistler-mode waves propagating at small as well as large angles relative to geomagnetic field lines. The inhomogeneity of the background magnetic field can result in an effective acceleration of trapped particles. Here, we derive useful analytical expressions for the probability of electron trapping by both parallel and oblique waves, paving the way for a full analytical description of trapping effects on the particle distribution. Numerical integrations of particle trajectories allow to demonstrate the accuracy of the derived analytical estimates. For realistic wave amplitudes, the levels of probabilities of trapping are generally comparable for oblique and parallel waves, but they turn out to be most efficient over complementary energy ranges. Trapping acceleration of 100 keV electrons. (C) 2015 AIP Publishing LLC

Легочная гемодинамика и диастолическая функция правого желудочка при изометрических нагрузках у детей с хронической бронхолегочной патологией

We studied pulmonary hemodynamics and right ventricular diastolic function in 300 healthy children and 392 children with chronic bronchopulmonary pathology in an isometric exercise. Using echocardiography were determined systolic, diastolic, mean, pulmonary artery pressure, total pulmonary resistance, diastolic function of the right ventricle. Defined normal values of reactivity of pulmonary hemodynamics and diastolic function of the right ventricle in an isometric load. In patients with chronic bronchopulmonary pathology set higher increase of systolic, diastolic, mean, pulmonary artery pressure, decrease diastolic reserve the right ventricle compared to the control. The worst violations of pulmonary hemodynamics and diastolic function of the right ventricle during isometric load observed in patients with chronic Infectious-inflammatory and interstitial lung disease.Изучалась легочная гемодинамика и диастолическая функция правого желудочка у 300 здоровых детей и 392 детей с хронической бронхолегочной патологией при изометрической физической нагрузке. С помощью доплерэхокардиографии определялось систолическое, диастолическое, среднее давление в легочной артерии, общее легочное сопротивление, показатели диастолической функции правого желудочка.Определены нормальные показатели реактивности легочной гемодинамики и диастолической функции правого желудочка при изометрической нагрузке. У пациентов с хронической бронхолегочной патологией установлены больший прирост по сравнению с контролем систолического, диастолического и среднего давления в легочной артерии, снижение диастолического резерва правого желудочка. В наибольшей степени нарушения легочной гемодинамики и диастолической функции правого желудочка при изометрической нагрузке наблюдаются у пациентов с хроническими инфекционно-воспалительными и интерстициальными заболеваниями легких

Epizootic Situation in the Crimean Federal District as Follows from Epidemiological Survey Results, 2014

The territory of the Crimean Peninsula is an endemic one as regards various natural-focal infections. The paper contains the data on epizootiological survey of 8 administrative regions of the Crimean Federal District (CFD). Carried out has been small mammals and Ixodidae ticks census. Identified is their species composition. Performed have been the field samples collection and laboratory studies for the presence of bacterial and viral infection agents. Established is the fact that H. marginatum is a dominating species among the ticks, collected during the spring season, while the house mouse prevails among the small mammals. As for the autumn collection of samples, the dominating species are H. punctata and common vole, respectively. Laboratory investigation results indicate the circulation of the agents of Ku fever, tick-borne spotty fever, Ixodidae tick-borne borreliosis, human granulocytic anaplasmosis, monocytic ehrlichiosis, hemorrhagic fever with renal syndrome and leptospirosis

Parker solar probe: four years of discoveries at solar cycle minimum

Launched on 12 Aug. 2018, NASA’s Parker Solar Probe had completed 13 of its scheduled 24 orbits around the Sun by Nov. 2022. The mission’s primary science goal is to determine the structure and dynamics of the Sun’s coronal magnetic field, understand how the solar corona and wind are heated and accelerated, and determine what processes accelerate energetic particles. Parker Solar Probe returned a treasure trove of science data that far exceeded quality, significance, and quantity expectations, leading to a significant number of discoveries reported in nearly 700 peer-reviewed publications. The first four years of the 7-year primary mission duration have been mostly during solar minimum conditions with few major solar events. Starting with orbit 8 (i.e., 28 Apr. 2021), Parker flew through the magnetically dominated corona, i.e., sub-Alfvénic solar wind, which is one of the mission’s primary objectives. In this paper, we present an overview of the scientific advances made mainly during the first four years of the Parker Solar Probe mission, which go well beyond the three science objectives that are: (1) Trace the flow of energy that heats and accelerates the solar corona and solar wind; (2) Determine the structure and dynamics of the plasma and magnetic fields at the sources of the solar wind; and (3) Explore mechanisms that accelerate and transport energetic particles

Diagnostics and treatment of arterial hypertension in children and adolescents, overview of new clinical guidelines of the American Academy of Pediatrics

The article analyzes clinical guidelines oftheAmericanAcademy ofPediatrics dd 2017 “ClinicalPractice Guideline forScreening andManagement of High Blood Pressure in Children and Adolescents”. This document contains new values of blood pressure in children, replaces the term “prehypertension” with the term “elevated blood pressure”, provides a simplified classification of arterial hypertension in adolescents over 13 years and revisesthe guidelinesfor daily blood pressure monitoring and echocardiography. The documentspecifiesthe criteria for diagnosing increased body weight of the left ventricular myocardium, changesthe target blood pressure levels. This new guidelines helps to optimize the diagnostics and treatment of hypertension in children. At the same time there is need for further comprehensive analysis of clinicalrecommendations and assessment of their practicalsignificance for pediatrics

Pulmonary hemodynamics and diastolic function of right ventricle at isometric exercises in children with chronic bronchopulmonary pathology

We studied pulmonary hemodynamics and right ventricular diastolic function in 300 healthy children and 392 children with chronic bronchopulmonary pathology in an isometric exercise. Using echocardiography were determined systolic, diastolic, mean, pulmonary artery pressure, total pulmonary resistance, diastolic function of the right ventricle. Defined normal values of reactivity of pulmonary hemodynamics and diastolic function of the right ventricle in an isometric load. In patients with chronic bronchopulmonary pathology set higher increase of systolic, diastolic, mean, pulmonary artery pressure, decrease diastolic reserve the right ventricle compared to the control. The worst violations of pulmonary hemodynamics and diastolic function of the right ventricle during isometric load observed in patients with chronic Infectious-inflammatory and interstitial lung disease

Shock Drift Acceleration of Ions in an Interplanetary Shock Observed by MMS

International audienceAn interplanetary (IP) shock wave was recorded crossing the Magnetospheric Multiscale constellation on 2018 January 8. Plasma measurements upstream of the shock indicate efficient proton acceleration in the IP shock ramp: 2–7 keV protons are observed upstream for about three minutes (∼8000 km) ahead of the IP shock ramp, outrunning the upstream waves. The differential energy flux of 2–7 keV protons decays slowly with distance from the ramp toward the upstream region (dropping by about half within 8 Earth radii from the ramp) and is lessened by a factor of about four in the downstream compared to the ramp (within a distance comparable to the gyroradius of ∼keV protons). Comparison with test-particle simulations has confirmed that the mechanism accelerating the solar wind protons and injecting them upstream is classical Shock Drift Acceleration (SDA). This example of observed proton acceleration by a low-Mach, quasi-perpendicular shock may be applicable to astrophysical contexts, such as supernova remnants or the acceleration of cosmic rays