Simulating the Time Projection Chamber responses at the MPD detector using Generative Adversarial Networks

High energy physics experiments rely heavily on the detailed detector simulation models in many tasks. Running these detailed models typically requires a notable amount of the computing time available to the experiments. In this work, we demonstrate a new approach to speed up the simulation of the Time Projection Chamber tracker of the MPD experiment at the NICA accelerator complex. Our method is based on a Generative Adversarial Network - a deep learning technique allowing for implicit estimation of the population distribution for a given set of objects. This approach lets us learn and then sample from the distribution of raw detector responses, conditioned on the parameters of the charged particle tracks. To evaluate the quality of the proposed model, we integrate a prototype into the MPD software stack and demonstrate that it produces high-quality events similar to the detailed simulator, with a speed-up of at least an order of magnitude. The prototype is trained on the responses from the inner part of the detector and, once expanded to the full detector, should be ready for use in physics tasks.Comment: This is a post-peer-review, pre-copyedit version of an article published in Eur. Phys. J. C. The final authenticated version is available online at: http://dx.doi.org/10.1140/epjc/s10052-021-09366-

Physical and mechanical properties and thermal protection efficiency of intumescent coatings

The new engineering technique for the experimental investigation of physical and mechanical characteristics of thermal protective intumescent coatings is offered. A mathematical model is proposed for predicting the thermal behavior of structures protected by coatings; the model is closed by the studied material characteristics. The heating of a metal plate under standard thermal loading conditions is modeled mathematically. The modeling results are in good agreement with bench test results for metal temperature under the coating. The proposed technique of studying physical and mechanical characteristics can be applied to identify and monitor the state of thermal protective intumescent coatings in the long-term operation

Multicriteria problems of regulation when planning building processes

In the rpocess of project construction organization under conditions of limited resources the problem of investor arises, which in onecriteria setting is as follows N invsted projects reindexed i=1,2,...,n are considered, initial parameters of the problem are:- duraion of iproject construction, - expected profit per unit of time from i project after putting it info operation ,-the time fixed , after the expiry of it a fine is paid for each overdued unit of time units in number. The investor resources are limited, i.e., at every moment of time investor can provid delivering of necessary resources only for one project .Any admissible problem decision of investor represents one of n! permutation of of numbers 1,2,..,n. X={x}-is the set of all admissible solutions (SAS) of this problem . In works of different authors the quality of decision is evaluated either by objective function (OF) of the type MINSUM where,by the objective function of the of the type MINMA

Validity of abundances derived from spaxel spectra of the MaNGA survey

We measured the emission lines in the spaxel spectra of MaNGA galaxies in order to determine the abundance distributions therein. It has been suggested that the strength of the low-ionization lines, R_2, N_2, and S_2 may be increased (relative to Balmer lines) in (some) spaxel spectra of the MaNGA survey due to a contribution of the radiation of the diffuse ionized gas. Consequently, the abundances derived from the spaxel spectra through strong-line methods may suffer from large errors. We examined this expectation by comparing the behaviour of the line intensities and the abundances estimated through different calibrations for slit spectra of HII regions in nearby galaxies, for fibre spectra from the SDSS, and for spaxel spectra of the MaNGA survey. We found that the S_2 strength is increased significantly in the fibre and spaxel spectra. The mean enhancement changes with metallicity and can be as large as a factor of 2. The mean distortion of R_2 and N_2 is less than a factor of 1.3. This suggests that Kaufmann et al.'s demarcation line between AGNs and HII regions in the BPT diagram is a useful criterion to reject spectra with significantly distorted strengths of the N_2 and R_2 lines. We find that the three-dimensional R calibration, which uses the N_2 and R_2 lines, produces reliable abundances in the MaNGA galaxies. The one-dimensional N2 calibration produces either reliable or wrong abundances depending on whether excitation and N/O abundance ratio in the target region (spaxel) are close to or differ from those parameters in the calibrating points located close to the calibration relation. We then determined abundance distributions within the optical radii in the discs of 47 MaNGA galaxies. The optical radii of the galaxies were estimated from the surface brightness profiles constructed based on the MaNGA observations.Comment: 19 pages, 15 figures, accepted for publication in A&

Providing tire stiffness tests in LMS Virtual.Lab-Imagine.Lab AMESim co-simulation

Tire stretched string model creating and stiffness tests performance are discussed. Main emphasis is put on the possibility of using data of string modal decomposition (string eigen forms and eigen frequencies) obtained from ABAQUS and co-simulation with Imagine.Lab AMESim which provide tuning of represented model. Also comparison of virtual simulated tests with real tests is performed.Рассмотрено создание струнной модели растяжения шины и проведено ее испытание на жесткость. Главный акцент сделан на возможности использования данных для струнной модели из программы ABAQUS и на проведении совместного моделирования с помощью программы Imagine.Lab AMESim, которая обеспечивает настройку представленную модель. Выполнено сравнение результатов проведенного моделирования с результатами реальных тестов

Study on occurrence of the IVS8-5T allele of the CFTR gene in Ukrainian males with spermatogenesis failure

Aim. To study the IVS8-5T allele of the CFTR gene and it is involvement in spermatogenesis failure in men with azoospermia and oligozoospermia. Methods. The IVS8-nT polymorphism was analyzed by PCR followed by «A.L.F.-express» fragment analysis in the infertile men group, consisting of 113 azoospermic and 217 oligozoospermic patients, and the control group of 150 fertile men with proven paternity. Results. The frequency of the IVS8-5T allele among infertile males was higher than in controls. A statistically significant difference (P < 0.05) was observed in the frequencies of the IVS8-5T allele in azoospermia patients (5.3 %) when compared with the control group (2.0 %). Conclusions. The IVS8-5T allele of the CFTR gene contributes to spermatogenesis failure and/or sperm maturation

40 YEARS EXPERIENCE OF INTERLOCKING INTRAMEDULLARY METALLIC-POLYMERIC OSTEOSYNTHESIS IN TREATMENT OF 1200 PATIENTS WITH SHAFT FRACTURES

The article comprises the main principles of interlocking intramedullary metallic-polymeric nailing (IIMPN) and the experience of its implementation in 1200 cases of shaft fractures during the period of 40 years. Three generations of metallic-polymeric nails and techniques for closed, semi-closed and open IIMPN were designed. The nails can successfully be interlocked with proximal and distal bone fragments without an intraoperative X-ray control. Therefore, the operation can be made in any hospital capable of surgical treatment of fractures. Unlike interlocking metallic nailing, the dynamic variant of IIMPN makes the additional operation of dynamization unnecessary. CMPN-3 and CMPN-2 nails have options of intraoperative axial and lateromedial compression between fragments, which is impossible in interlocking metallic nailing. The carving conjunction between screws and polymer, which flexibility is close to that of the bone, excludes critical concentration of tensions and considerable dynamic loadings, and therefore prevents fractures of the interlocking screws. Good follow-up results were obtained in 94.2% patients.The article comprises the main principles of interlocking intramedullary metallic-polymeric nailing (IIMPN) and the experience of its implementation in 1200 cases of shaft fractures during the period of 40 years. Three generations of metallic-polymeric nails and techniques for closed, semi-closed and open IIMPN were designed. The nails can successfully be interlocked with proximal and distal bone fragments without an intraoperative X-ray control. Therefore, the operation can be made in any hospital capable of surgical treatment of fractures. Unlike interlocking metallic nailing, the dynamic variant of IIMPN makes the additional operation of dynamization unnecessary. CMPN-3 and CMPN-2 nails have options of intraoperative axial and lateromedial compression between fragments, which is impossible in interlocking metallic nailing. The carving conjunction between screws and polymer, which flexibility is close to that of the bone, excludes critical concentration of tensions and considerable dynamic loadings, and therefore prevents fractures of the interlocking screws. Good follow-up results were obtained in 94.2% patients

Research of the marketing instruments of adoption of management decisions in the field of planning and business development

The analysis of the elements, included in the digital marketing complex, has been сonducted. One of the most popular marketing tools – digital funnel of sales has been considered. As key components of a funnel of sales, search optimization, which is necessary for advance of the website with its subsequent raising in search rating and also web analytics as the tools of the analysis of statistical data on visit of the website by users, directed to optimization of work of a resource and increase in sales volume, have been allocated