Light quark mass ratio from Dalitz plot of η→π+π−π0\eta \to \pi^+\pi^-\pi^0 decay

High statistics Dalitz-plot distribution of $\eta \to \pi^+\pi^-\pi^0$ decay obtained recently by KLOE collaboration \cite{kloe} is fitted to the results of corresponding theoretical calculations in Chiral Perturbation Theory (ChPT) with unitarity corrections taken into account. The quark mass ratio $Q = \sqrt{(m^2_s - (m_d + m_u)^2/4)/(m^2_d - m^2_u)}$ can be otained from this analysis. We get $Q= 22.8\pm 0.4$ which differs from the value $Q_{DT} = 24.2$ that follows from Dashen's theorem and agrees with recently calculated electromagnetic kaon mass difference.Comment: 2 pages, no figure

Determination of the monetisation coefficient dynamics of the Russian economy and its impact on macroeconomic indicators

The monetisation coefficient is the most important indicator of the saturation level of the economy with money. This article examines the dynamics of the monetisation coefficient of the Russian economy in 2017–2021, provides a forecast for the level of monetisation for 2022, and an assessment of its impact on key macroeconomic indicators: unemployment, inflation and economic growth. Based on the correlation analysis, the existence of a strong relationship between the monetisation coefficient and the unemployment rate in Russia has been determined, while an increase in unemployment in the country contributes to a decrease in the gross domestic product, which, in turn, is an important component in calculating the monetisation level. A direct linear relationship between the monetisation level and gross domestic product has been revealed. The existence of a direct relationship between the level of inflation and the monetisation of the Russian economy has been determined. The conclusion is made about the need to increase the monetisation level of the Russian economy

ПРОГНОЗУВАННЯ ПЕРЕБІГУ ТА НАСЛІДКУ СПАЙКОВОЇ КИШКОВОЇ НЕПРОХІДНОСТІ У ДІТЕЙ

Features of clinical current of an adhesive intestinal obstruction at 90 children have been investigated. Based on the analysis of 210 attributes and 32 most significant from they have been selected for forecasting an outcome of disease. Conducting factors in an estimation of risk of current and an outcome of an adhesive intestinal obstruction at children are symptomatic characteristics of “a place of illness”, duration of clinical displays of disease, the general condition at admission in a hospital, an expressiveness haemodynamical infringements, viability of an intestine, and also character of current of the early postoperative period. It fixed, that between a score and probability of a failure of an adhesive intestinal obstruction there is a severe dependence, which carries exponential character. At the sum of marks up to 17 (I degree of risk) the probability of a failure of disease makes 5,1 %, from 17,1 up to 53,5 points (II degree of risk) – 30,3 %. At III degree of risk (the sum of marks 53,6 – 122) the probability of a failure reaches 72,0 %, and at IV degree - % (the sum of marks more than 122,0). The offered scheme of definition of risk of clinical current of the acute form of an adhesive disease at children allows quantitatively to estimate heaviness of an initial condition of patients and in most cases correctly to predict an outcome of disease.Изучены особенности клинического течения спаечной кишечной непроходимости у 90 детей. На основании анализа 210 признаков было отобрано 32 наиболее значимых для прогнозирования исхода заболевания. Ведущими факторами в оценке риска течения и исхода спаечной кишечной непроходимости у детей являются симптоматические характеристики “места болезни”, длительность клинических проявлений заболевания, общее состояние при поступлении в стационар, выраженность гемодинамических нарушений, жизнеспособность кишечника, а также характер течения раннего послеоперационного периода. Установлено, что между суммой баллов и вероятностью неблагоприятного исхода спаечной кишечной непроходимости существует строгая зависимость, которая носит экспоненциальный характер. При сумме баллов до 17 (I степень риска) вероятность неблагоприятного исхода заболевания составляет 5,1 %, от 17,1 до 53,5 балла (II степень риска) – 30,3 %. При III степени риска (сумма баллов 53,6 – 122) вероятность неблагоприятного исхода достигает 72,0 %, а при IV степени - 99,8 % (сумма баллов более 122,0). Предлагаемая схема определения риска клинического течения острой формы спаечной болезни у детей позволяет количественно оценить тяжесть исходного состояния больных и в большинстве случаев правильно предсказать исход заболевания.Вивчені особливості клінічного перебігу спайкової кишкової непрохідності у 90 дітей. На підставі аналізу 210 ознак було відібрано 32 найбільш значимих для прогнозування результату захворювання. Провідними чинниками у оцінці ризику перебігу і результату спайкової кишкової непрохідності у дітей є симптоматичні характеристики “місця хвороби”, тривалість клінічних проявів захворювання, загальний стан при госпіталізації у стаціонар, вираженість гемодинамічних порушень, життєздатність кишечника, а також характер перебігу раннього післяопераційного періоду. Встановлено, що між сумою балів та імовірністю несприятливого результату спайкової кишкової непрохідності існує чітка залежність, яка має експоненційний характер. При сумі балів до 17 (І ступінь ризику) імовірність несприятливого результату захворювання складає 5,1 %, від 17,1 до 53,5 бала (ІІ ступінь ризику) – 30,3 %. При ІІІ ступені ризику (сума балів 53,6 – 122) імовірність несприятливого результату досягає 72,0 %, а при ІV ступені - » 99,8 % (сума балів більше 122,0). Запропонована схема визначення ризику клінічного перебігу гострої форми спайкової хвороби у дітей дозволяє кількісно оцінити тяжкість вихідного стану хворих і в більшості випадків правильно передбачити результат захворювання

Role of myocardial properties and pacing lead location on ECG in personalized paced heart models

Personalised cardiac models were built from the computed tomography imaging data for two patients with implanted cardiac resynchronisation therapy devices. The cardiac models comprised a biventricular model of myocardial electrophysiology coupled with a model of the torso to simulate the body surface potential map. The models were verified against electrocardiogams (ECG) recorded in the patients from 240 leads on the body surface under left ventricular pacing. The simulated ECG demonstrated a significant sensitivity to the myocardial anisotropy and location of the pacing electrode tip in the models. An apicobasal cellular heterogeneity was shown to be less significant for the ECG pattern at the paced-ventricle activation than that showed earlier by Keller and co-authors (2012) for the normal activation sequence. © 2017 IEEE Computer Society. All rights reserved.This study was supported by the RAS Presidium Programme I.33Π, and Government of the Russian Federation (agreement 02.A03.21.0006). We used the computational clusters of Ural Federal University and ”URAN” of Institute of Mathematics and Mechanics (Ekaterinburg)

Parameter variations in personalized electrophysiological models of human heart ventricles

The objectives of this study were to evaluate the accuracy of personalized numerical simulations of the electrical activity in human ventricles by comparing simulated electrocardiograms (ECGs) with real patients' ECGs and analyzing the sensitivity of the model output to variations in the model parameters. We used standard 12-lead ECGs and up to 224 unipolar body-surface ECGs to record three patients with cardiac resynchronization therapy devices and three patients with focal ventricular tachycardia. Patient-tailored geometrical models of the ventricles, atria, large vessels, liver, and spine were created using computed tomography data. Ten cases of focal ventricular activation were simulated using the bidomain model and the TNNP 2006 cellular model. The population-based values of electrical conductivities and other model parameters were used for accuracy analysis, and their variations were used for sensitivity analysis. The mean correlation coefficient between the simulated and real ECGs varied significantly (from r = 0.29 to r = 0.86) among the simulated cases. A strong mean correlation (r > 0.7) was found in eight of the ten model cases. The accuracy of the ECG simulation varied widely in the same patient depending on the localization of the excitation origin. The sensitivity analysis revealed that variations in the anisotropy ratio, blood conductivity, and cellular apicobasal heterogeneity had the strongest influence on transmembrane potential, while variation in lung conductivity had the greatest influence on body-surface ECGs. Futhermore, the anisotropy ratio predominantly affected the latest activation time and repolarization time dispersion, while the cellular apicobasal heterogeneity mainly affected the dispersion of action potential duration, and variation in lung conductivity mainly led to changes in the amplitudes of ECGs and cardiac electrograms. We also found that the effects of certain parameter variations had specific regional patterns on the cardiac and body surfaces. These observations are useful for further developing personalized cardiac models

Measurement of the Slope Parameter for the eta->3pi0 Decay in the pp->pp eta Reaction

The CELSIUS/WASA setup is used to measure the 3pi0 decay of eta mesons produced in pp interactions with beam kinetic energies of 1.36 and 1.45 GeV. The efficiency-corrected Dalitz plot and density distributions for this decay are shown, together with a fit of the quadratic slope parameter alpha yielding alpha = -0.026 +/- 0.010(stat) +/- 0.010(syst). This value is compared to recent experimental results and theoretical predictions.Comment: 4 pages, 7 Postscript figures, uses revtex4.st

Measurement of the eta->pi+pi-e+e- decay branching ratio

The reaction pd->3He eta at threshold was used to provide a clean source of eta mesons for decay studies with the WASA detector at CELSIUS. The branching ratio of the decay eta->pi+pi-e+e- is measured to be (4.3+/-1.3+/-0.4)x10^-4.Comment: 10 pages,6 figures revised versio

The pp -> pp pi pi pi reaction channels in the threshold region

The cross section for prompt neutral and charged three pion production in pp interactions was measured at excess energies in the range 160 - 217 MeV. That comprises the first measurement of the pp->pp pi0pi0pi0 reaction and the comparison with the pp->pp pi+pi-pi0 reaction, in a very direct way. The experiment was performed above the eta meson production threshold and the cross section normalization was obtained from a concurrent measurement of the reaction pp->pp eta with the eta decaying into 3 pions. Since the same final states are selected, the measurement has a low systematical error. The measured cross section ratio sigma(pp->pp pi+pi-pi0)/sigma(pp->pp pi0\pi0\pi0) is compared to predictions of dominance of different isobars in the intermediate state.Comment: 12 pages, 4 figures New discussion on the pp->pp3pi reaction mechanis