26 research outputs found
About the Perturbing Factors Influence in the Spacecraft Motion Simulation Model
Abstract The new simulation model of the spacecraft's center of mass motion with taking into account of gravitational potentials of the Earth, the Moon and the Sun is presented in this paper. The simulation model was created on the basis of analysis of the present mathematical models of gravitational potentials of the Earth, the Moon and the Sun and different methods of numeral calculation. Influence of the Earth's atmosphere, which causes the spacecraft motion deceleration, was taken into account. By means of the created simulation model the analysis of the environment perturbation factors influencing on the spacecraft motion trajectory was carried out. It has been revealed that deviation of the calculated orbit from the given one depends on orbit height, and this dependence has been defined. The estimation of relative influence of the moments of various forces on the mass center motion was carried out
Spatial variations in the Caspian Sea wave climate in 2002-2013 from satellite altimetry
The core properties of the wave climate and its changes in the Caspian Sea
are established in terms of the annual mean significant wave height and its
regional changes in 2002-2013 based on the outcome of the satellite altimetry
mission JASON-1. Remotely estimated wave heights are validated against
properties of the empirical distribution of instrumentally measured wave
heights in the southern Caspian Sea and monthly averages of visually observed
wave heights at three locations. A correction for systematic differences leads
to very good correspondence between monthly averaged in situ and satellite data
with a typical root mean square difference of 0.06 m. The average significant
wave height in the Caspian Sea is 0.5-0.7 m in the northern basin of the sea,
around 1.2 m in large parts of the central and southern basins and reaches up
to 1.8 m in the northern segment of the central basin. The basin-wide average
wave intensity varied insignificantly in the range of 1.02-1.14 m in 2002-2013.
These estimates overestimate the wave heights by about 30% because low wave
conditions are ignored. Substantial and statistically significant changes in
the wave height occurred in certain areas. The wave height decreased by 0.019
+- 0.007 m/yr in the eastern segment of the central basin and by 0.04 +- 0.04
m/yr in the western segment of the southern basin. These changes can be
explained by an increase in the frequency of westerly winds at the expence of
southerly winds. Both basin-wide and regional extreme wave heights exhibit
large interannual variations but do not show any significant trend. The
patterns of changes in mean and extreme wave height are different. The average
wave height has increased while the extreme wave height has decreased in the
eastern segment of the southern basin.Comment: 16 pages, 10 figure
SMES DEVELOPMENT AND CORRUPTION: CASE OF KAZAKHSTAN
The article presents a study of the corruption perception and the involvement of SMEs in corruption practices.
The main goal of the paper is to provide an analysis of corruption perception of the SMEs representatives, its parts and research
methodology to provide an adequate picture and analysis of corruption of the Kazakhstan. For obtaining a comparative picture,
we interviewed 500 representatives of SMEs and 500 civil servants. We used a mass survey (face-to-face) method.
The results show that the presence of “gap” between perception of corruption and degree of the respondents’ involvement in
corrupt practices. The respondents believe that corruption is widespread, but they themselves were rarely involved in corrupt
practices. The key message is that the SMEs representatives consider this problem to be acute, but they are not ready to talk about
their own experience in this regard
Education and certification on heart failure of the Heart Failure Association of the European Society of Cardiology
In order to ensure that the next generation of heart failure specialists will receive high-quality training, this document outlines the new European training and certification requirements for physicians with an interest in heart failure and for those working in certified heart failure centres, required by the Heart Failure Association (HFA) of the European Society of Cardiology (ESC)
2022 ESC guidelines for the management of patients with ventricular arrhythmias and the prevention of sudden cardiac death: developed by the task force for the management of patients with ventricular arrhythmias and the prevention of sudden cardiac death of the European Society of Cardiology (ESC) endorsed by the Association for European Paediatric and Congenital Cardiology (A
Cardiolog
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How to tackle therapeutic inertia in heart failure with reduced ejection fraction. A scientific statement of the Heart Failure Association of the ESC.
Guideline-directed medical therapy (GDMT) in patients with heart failure and reduced ejection fraction (HFrEF) reduces morbidity and mortality, but its implementation is often poor in daily clinical practice. Barriers to implementation include clinical and organizational factors that might contribute to clinical inertia, i.e. avoidance/delay of recommended treatment initiation/optimization. The spectrum of strategies that might be applied to foster GDMT implementation is wide, and involves the organizational set-up of heart failure care pathways, tailored drug initiation/optimization strategies increasing the chance of successful implementation, digital tools/telehealth interventions, educational activities and strategies targeting patient/physician awareness, and use of quality registries. This scientific statement by the Heart Failure Association of the ESC provides an overview of the current state of GDMT implementation in HFrEF, clinical and organizational barriers to implementation, and aims at suggesting a comprehensive framework on how to overcome clinical inertia and ultimately improve implementation of GDMT in HFrEF based on up-to-date evidence
COVID-19 vaccination in patients with heart failure: a position paper of the Heart Failure Association of the European Society of Cardiology
Patients with heart failure (HF) who contract SARS-CoV-2 infection are at a higher risk of cardiovascular and non-cardiovascular morbidity and mortality. Regardless of therapeutic attempts in COVID-19, vaccination remains the most promising global approach at present for controlling this disease. There are several concerns and misconceptions regarding the clinical indications, optimal mode of delivery, safety and efficacy of COVID-19 vaccines for patients with HF. This document provides guidance to all healthcare professionals regarding the implementation of a COVID-19 vaccination scheme in patients with HF. COVID-19 vaccination is indicated in all patients with HF, including those who are immunocompromised (e.g. after heart transplantation receiving immunosuppressive therapy) and with frailty syndrome. It is preferable to vaccinate against COVID-19 patients with HF in an optimal clinical state, which would include clinical stability, adequate hydration and nutrition, optimized treatment of HF and other comorbidities (including iron deficiency), but corrective measures should not be allowed to delay vaccination. Patients with HF who have been vaccinated against COVID-19 need to continue precautionary measures, including the use of facemasks, hand hygiene and social distancing. Knowledge on strategies preventing SARS-CoV-2 infection (including the COVID-19 vaccination) should be included in the comprehensive educational programmes delivered to patients with HF. This article is protected by copyright. All rights reserved