Modeling of Gravitational Separation By the Method of Smoothed Particles Hydrodynamics (SPH)

The article deals with the peculiarities of solving the problem of numerical simulation of gravity separation of dispersed particles. A simulation model is created by using the Monte Carlo method, in which the ‘first principles’ (elementary particles) are particles of the charge and reaction products. The object-oriented language ActionScript 3.0 was chosen as the programming language. At the same time, the most difficult(computational) task was to find neighbors (complexity N2 ). In this article, the comparison analysis of the improved algorithm of neighbors search of complexity (2⋅N⋅k) with standard neighbors search is given; the object of comparison is the quantity of the displayed particles moving in real time. Keywords: modeling of flows, gravity separator, the Monte Carlo method, smoothed particles, complexity of the algorithm, neighbors searc

Laboratory workshop on instrumental specialties of physicotechnological institute of urfu. part 3

The publication affects the new laboratory works included in the laboratory practical work on disciplines associated with measurement and microprocessor systems. The new laboratory works were tested during training on the instrumental specialties of physico-technological institute of UrFUВ данной публикации рассматриваются новые лабораторные работы, включенные в лабораторный практикум по дисциплинам, которые связаны с контрольно-измерительными приборами на базе микропроцессорных устройств. Обсуждаемые лабораторные работы прошли апробацию при обучении на приборостроительных специальностях физико-технологического института УрФ

StopCOVID cohort : An observational study of 3,480 patients admitted to the Sechenov University hospital network in Moscow city for suspected COVID-19 infection

© 2020 Oxford University Press. This is a pre-copyedited, author-produced PDF of an article accepted for publication in Clinical Infectious Diseases following peer review. The version of record is available online at: https://doi.org/10.1093/cid/ciaa1535.BACKGROUND: The epidemiology, clinical course, and outcomes of COVID-19 patients in the Russian population are unknown. Information on the differences between laboratory-confirmed and clinically-diagnosed COVID-19 in real-life settings is lacking. METHODS: We extracted data from the medical records of adult patients who were consecutively admitted for suspected COVID-19 infection in Moscow, between April 8 and May 28, 2020. RESULTS: Of the 4261 patients hospitalised for suspected COVID-19, outcomes were available for 3480 patients (median age 56 years (interquartile range 45-66). The commonest comorbidities were hypertension, obesity, chronic cardiac disease and diabetes. Half of the patients (n=1728) had a positive RT-PCR while 1748 were negative on RT-PCR but had clinical symptoms and characteristic CT signs suggestive of COVID-19 infection.No significant differences in frequency of symptoms, laboratory test results and risk factors for in-hospital mortality were found between those exclusively clinically diagnosed or with positive SARS-CoV-2 RT-PCR.In a multivariable logistic regression model the following were associated with in-hospital mortality; older age (per 1 year increase) odds ratio [OR] 1.05 (95% confidence interval (CI) 1.03 - 1.06); male sex (OR 1.71, 1.24 - 2.37); chronic kidney disease (OR 2.99, 1.89 - 4.64); diabetes (OR 2.1, 1.46 - 2.99); chronic cardiac disease (OR 1.78, 1.24 - 2.57) and dementia (OR 2.73, 1.34 - 5.47). CONCLUSIONS: Age, male sex, and chronic comorbidities were risk factors for in-hospital mortality. The combination of clinical features were sufficient to diagnoseCOVID-19 infection indicating that laboratory testing is not critical in real-life clinical practice.Peer reviewe

Outcomes from elective colorectal cancer surgery during the SARS-CoV-2 pandemic

This study aimed to describe the change in surgical practice and the impact of SARS-CoV-2 on mortality after surgical resection of colorectal cancer during the initial phases of the SARS-CoV-2 pandemic

Ignition Delay Times of Jet-A/Air Mixtures

Ignition of Jet-A/air mixtures was studied behind reflected shock waves. Heating of shock tube at temperature of 150 °C was used to prepare a homogeneous fuel mixture. Ignition delay times were measured from OH emission at 309 nm (A2Σ – X2Π) and from absorption of He-Ne laser radiation at 3.3922 μm. The conditions behind shock waves were calculated by one-dimensional shock wave theory from initial conditions T1, P1, mixture composition and incident shock wave velocity. The ignition delay times were obtained at two fixed pressures 10, 20 atm for lean, stoichiometric and rich mixtures (ø=0.5, 1, 2) at an overall temperature range of 1040-1380 K

Preparation of SiO_2 films in heterogeneous dissociation of tetraethoxysilane in ultraviolet radiation

Translated from Russian (Fiz. Khim. Obrab. Mater. 1995 (2) p. 93-100)SIGLEAvailable from British Library Document Supply Centre-DSC:9023.190(VR-Trans--8547)T / BLDSC - British Library Document Supply CentreGBUnited Kingdo

The mechanism of transition of a dopant into the surfacelayer of a semiconductor during diffusion

Translated from Russian (Fiz. Khim. Obrab. Mater. 1995 (4) p. 129-132)SIGLEAvailable from British Library Document Supply Centre-DSC:9023.190(VR-Trans--8676)T / BLDSC - British Library Document Supply CentreGBUnited Kingdo