bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reduction of detailed kinetic mechanisms for pyrolysis, combustion, and detonation modeling
Authors: Tereza A M , Agafonov G L , Betev A S , Medvedev S P 
Published: December 2020

Abstract
The values of ignition delay predicted for stoichiometric C2H2/O2 and CH4/O2 mixtures by various detailed kinetic mechanisms presented in the literature are compared over the temperature range of 1000 < T <2100 K and the pressure range of 0.02 < P < 1.1 MPa. The number of species in detailed kinetic mechanisms is reduced by a trial-and-error method while keeping the response of ignition delay within a relative error range of 5 = 30%. The automatic computer code developed in this study has made it possible to reduce the number of species by a factor of more than 2 for the C2H2/O2 mixture and a factor of 3 for the CH4/O2 mixture, respectively. A comparison of predictions based on the reduced mechanisms with experimental data presented in the literature shows good agreement.
Analytical approximation of neutrino distribution function in core-collapse supernova
Authors: Dobrynina A , Koptyaeva E , Ognev I 
Published: December 2020

Abstract
Results of the numerical simulations of the neutrino angular distribution in core-collapse supernova were analyzed. As analysis shown, the neutrino angular distribution function can be approximated by a one-parametric Gaussian function. The proposed approximation describes about 90% of all neutrinos in the core-collapse supernova at times t ≳ 0.2 sec after a core bounce and relatively large distances from proto-neutron-star center. Therefore, it could be a good analytical approximation of the numerical data. At small values of time and distance an accuracy of this approximation significantly decreases.
Rigidity dependences of the main characteristics of Forbush decreases
Authors: Lagoida I A , Voronov S A , Mikhailov V V 
Published: December 2020

Abstract
Forbush decrease is an effect in the cosmic rays physics which manifests itself as a sudden depression of the intensity of cosmic rays. Active phase of Forbush decrease lasts for several days and is often accompanied by a geomagnetic storm. The reason for such sudden depressions originates from the Sun, and is connected with a phenomenon of solar physics known as coronal mass ejections. Nowadays Forbush decreases are mostly studied by ground based detectors such as neutron monitors and muon hodoscopes. These detectors are characterized by small statistical fluctuations but register secondary cosmic rays which are created in interactions of primary cosmic rays with Earth atmosphere. This work is based on the data obtained by the satellite experiment PAMELA. The main characteristics of Forbush decreases are calculated for a fluxes of cosmic rays protons in the rigidity range 0.8 – 9 GV.
Effect of a strongly magnetized plasma on the resonant photon scattering process
Authors: Chistyakov M V , Rumuyantsev D A , Yarkov A A 
Published: December 2020

Abstract
In this paper, the photons absorption rate in a relatively strong magnetic field in the Compton process taking into account the resonance on the virtual electron are calculated. A comparative analysis of the obtained result with the nonresonant case was carried out.
Search for 10He in the stopped pion absorption 14C(π−, p
3He)X
Authors: Chernyshev B A , Gurov Yu B , Lapushkin S V , Leonova T I , Sandukovsky V G , Schurenkova T D , Tel’kushev M V 
Published: December 2020

Abstract
The formation of the 10He states was studied in the reaction of stopped pion absorption 14C(π−, p
3He)X. Measurements were carried out using two-arm multilayer semiconductor spectrometer and “radioactive” target consisting of 76% 14C and 23% 12C. The contribution of uncontrolled impurities in the target was ≤ 1%. In order to determine the contribution of the 12C impurity measurements were performed on an isotope pure carbon 12C target. An indication on the excitation state with Ex
~ 6 MeV (Er
~ 7 MeV) was observed in missing mass spectrum of 14C(π−, p
3He)X reaction. Comparison with theoretical and experimental results obtained by other authors was performed.
Analysis of velocity distributions in projectile fragmentation reactions of 18O ions on 9Be and 181Ta targets at 35 A MeV
Authors: Erdemchimeg B , Artukh A G , Klygin S A , Kononenko G A , Sereda Yu M , Vorontsov A N , Mikhailova T I 
Published: December 2020

Abstract
Up to date analysis of velocity and isotope distributions of light fragments obtained in the projectile fragmentation reactions of 18O at 35 A MeV on 9Be and 181Ta targets measured at COMBAS fragment separator at the U400 M Research Facility in JINR are presented. The results of velocity spectra analytical parameterization and isotopic ratios are compared with the ones obtained in the experiments presented in the literature. The discussion of the different mechanisms involved in these types of the reactions is given.
Isospin triplet A=14: search for states with enhanced radii
Authors: Demyanova A S , Danilov A N , Ogloblin A A , Starastsin V I , Dmitriev S V , Leonova T I , Goncharov S A , Belyaeva T L , Trzaska W H , Gurov Yu B 
Published: December 2020

Abstract
This article is devoted to study of isobar-analogue states 1− in triplet A=14: 14C-14N-14O. Previously signs of neutron halo in the 1−, 6.09 MeV state of 14C were obtained by two independent groups. In this article we propose to study neighbouring nuclei 14N and 14O using the Modified diffraction model (MDM) method and the method of Asymptotic normalization coefficients (ANC). Methods were applied to experimental differential cross sections of 14C(α,α)14C scattering and reactions 13C(3He,d)14N and 14N(3He,t)14O. MDM and ANC gave practically similar within errors radii for the studied 1− states: the 6.09 MeV state in 14C – 2.7±0.1 fm, the 8.06 MeV state in 14N – 2.7 ± 0.1 fm, the 5.17 MeV state in 14O – 2.6 ± 0.2 fm. Moreover, the signs of proton halo in the 1− state of 14N were obtained for the first time.
Gas gain study of a large-size multilayer Micromegas
Authors: Dubinin F , Iengo P , Sekhniaidze G , Zhukov K 
Published: December 2020

Abstract
The results of the study of a large-size, multilayer Micromegas detector with X-ray source Cd-109 are discussed. The detector consists of 4 layers, each of them is a Micromegas detector with resistive anode and strip-based read-out structure. The gas volume of the chamber is split to 4 parts interconnected in 6 points. Results of the measurements of the gas gain curves and the 1st Townsend coefficient as well as the E_amp/E_drift characteristics are presented and discussed. The detector presented a non-negligible gas leak, affecting the reported results. The influence of the leak on operation of the module is estimated.
Development of Si Beam Position Detectors for NA61/SHINE experiment
Authors: Makhnev A , Guber F , Serebryakov D , Pulawski S , Kowalski S 
Published: December 2020

Abstract
The NA61/SHINE experiment at the CERN SPS is undergoing a major upgrade during the LHC Long Shutdown 2 period (2019-2021). The upgrade is essential to fulfil the requirements of the new open charm measurement program. In this program detector will operate at a beam intensity increased by a factor of 10, which requires an upgrade of current Beam Position Detectors (BPDs). New BPDs should monitor lead and proton beam intensities with up to 105 Hz rate. In this paper, progress on design and development of the new BPDs based on Si strip detectors, its front-end and readout electronics, as well as integration with the NA61/SHINE DAQ is presented.
Firmware developments on the TileCoM for the Phase-II Upgrade of the ATLAS Tile Calorimeter
Authors: Gololo M G D , Carrio Argos F , Martins F , Garcia B M 
Published: December 2020

Abstract
The Tile Computer on Module (TileCoM) mezzanine board is one of the auxiliary boards of the Tile PreProcessor (TilePPr) for the Phase-II Upgrade of the readout electronics of the ATLAS Tile Calorimeter (TileCal). This board will be responsible for system monitoring and configuration by interfacing the Trigger Data Acquisition (TDAQ) system and the TilePPr. Features include configuration and monitoring of the Advanced Telecommunications Computing Architecture (ATCA) carrier and Compact Processing Module (CPM) onboard sensors through I2C and Gigabit Ethernet. This contribution presents firmware developments on an embedded Linux for the ZYNQ System-on-Chip (SoC) targeting an Avnet Ultra96-V2 ZYNQ UltraScale+ MPSoC evaluation board. This test bench will serve as a basis for the development of the main functionalities of the TileCoM mezzanine board to interface the TilePPr with the Detector Control System (DCS) and the TDAQ-I system of the Tile Calorimeter.
A gamma-ray imaging camera for NORM radioactivity detection
Authors: Altomare C , Di Venere L , Fanchini E , Giordano F , Loparco F , Morichi M , Pantaleo F R , Spinelli P , Swiderski L 
Published: December 2020

Abstract
Naturally occurring radioactive materials (NORM) and technologically enhanced naturally occurring radioactive materials (TENORM) consists of materials enriched with radioactive elements, found in the environment, with concentrations over the ambient natural radioactivity average, such as industrial wastes and extraction byproducts. We designed a camera for gamma-ray imaging and radionuclide identification based on the coded mask technique. The camera proposed is a compact, lightweight instrument, ideal for real-time analysis, with a low power consumption, suitable for industrial process and ambient monitoring. We built a prototype consisting in 16 CsI(Tl) scintillators coupled to photo-multiplier tubes (PMTs) with a digital readout. We used a 7 × 7 mask composed by transparent and opaque tiles to encode radioactive gamma-rays sources image and use a reconstruction algorithm for decoding. The system was first tested using free gamma-ray radioactive sources placed at a fixed distance from the mask and than, the same sources, was placed inside an industrial nuclear waste drum to test shielding and detection limit. We will also show the results with a NORM igneous rock sample and we will try to identify the radioactive sources after a estimation of the count rate over the background, the test was carried out in lead chamber to shield the natural laboratory background. The performance of the prototype camera in terms of energy and spatial resolution with respect the detection time will be shown.
Time response simulation of a “shashlyk”-type calorimeter as applied to ECAL MPD / NICA
Authors: Skobliakov A V , Kulikov V V , Bulychjov S A , Kantsyrev A V , Martemianov M A , Matsyuk M A , Tyapkin I A 
Published: December 2020

Abstract
In the frame of the GEANT4 toolkit, a numerical simulation of light collection from the tower of the EMC MPD / NICA detector was carried out. The influence of reflective coatings of the scintillator surface, the propagation of light in fibers, taking into account their multilayer structure and light reflection from their ends, as well as the effects of joining a fiber bundle with an MPPC photodetector are considered. The temporal forms of the light signal at the MPPC input were obtained taking into account only geometric effects.
Investigation of the EAS neutron component with the URAN array: first simulation and experimental results
Authors: Izhbulyakova Z T , Bogdanov A G , Bogdanov F A , Gromushkin D M , Pochestnev A D , Shulzhenko I A , Yurin K O 
Published: December 2020

Abstract
The URAN array was created in the Scientific and Educational Centre NEVOD (MEPhI). The URAN facility was designed to register neutrons that accompany EAS at the energies of the primary cosmic rays around and above the “knee”. It includes 72 detectors based on a thin inorganic scintillator for registration of the charged and neutron components of the EAS. The total area of the facility is about 103 m2. For the correct interpretation of the experimental data of the URAN, the response of the URAN facility to the passage of EAS was simulated using the CORSIKA7.6900 program and Geant4.10.5 software package. It gave a possibility to study neutron generation in the experimental complex building. Experimental data were processed and analyzed. Results of simulation and experimental data are presented.
A stratospheric and satellite CubeSat format probe for detecting relativistic runaway electron avalanches
Authors: Kurmasheva T A , Briukhanov K A , Arkhangelskaja I V , Arkhangelskiy A I 
Published: December 2020

Abstract
In planetary atmospheres, runaway electron avalanches could happen due to large scale electric fields, which accelerate electrons to energies about 0,1 – 10 MeV. This phenomenon is not fully understood. Nowadays, most of the satellite data is obtained on low orbits. However, runaway breakdown can also occur at altitudes less than 30 km. In this case, most of the radiation is scattered without reaching the satellites on high orbits. The formation of charged particles in the atmosphere can affect the results of numerous experiments. Therefore, it is important to have the most proper model of this phenomenon. Project goal is to create a stratospheric CubeSat format probe capable of detecting these events at an altitude of about 30 km and above. The purpose of the experiment is to observe changes in the fluxes of both high-energy electrons and radiation, as well as an analysis of possible correlations of the measured parameters. We developed a concept of the probe and created a detector prototype, consisting of a thick polystyrene scintillation counter wrapped in mylar and two SiPM SensL MicroSB-30035-X13 readout.
Domain wall thickness and deformations of the field model
Authors: Blinov Petr A , Gani Tatiana V , Gani Vakhid A 
Published: December 2020

Abstract
We consider the change in the asymptotic behavior of solutions of the type of flat domain walls (i.e. kink solutions) in field-theoretic models with a real scalar field. We show that when the model is deformed by a bounded deforming function, the exponential asymptotics of the corresponding kink solutions remain exponential, while the power-law ones remain power-law. However, the parameters of these asymptotics, which are related to the wall thickness, can change.
Interactions of η-meson in asymmetric nuclear matter
Authors: Kumar R , Kumar A 
Published: December 2020

Abstract
The interactions between η-meson and nucleons are studied by the unification of the chiral SU(3) model and chiral perturbation theory. The η meson-nucleon interactions for the next-to-leading order terms are derived by expanding the ηN interaction Lagrangian within the chiral perturbation theory. Using the chiral SU(3) model, we calculate the in-medium scalar density of protons

ρ
s
p

and neutrons

ρ
s
n

for different values of temperature T, isospin asymmetry I and nucleonic density ρN. Within the chiral SU(3) model the in-medium properties of nucleons are evaluated in terms of scalar-isoscalar fields σ, and ζ and the scalar-isovector field δ. The scalar densities of nucleons calculated using chiral SU(3) model are used as input in the equation of motion of η mesons obtained from chiral perturbation theory. We solve the equation of motion for sigma term

Σ
η
N
=
280
±
130

MeV

and scattering length aηN
= 1.025 fm for different values of asymmetry of the medium. We find an attractive mass-shift of the η meson in nuclear medium and the magnitude of this shift increases with increasing density. Finite isospin asymmetry of the medium causes less drop in the in-medium mass of η mesons. The negative mass-shift indicates the possibility of the formation of η-mesic nuclei.
Tuning of the primary vertex reconstruction algorithm in the BM@N experiment
Authors: Driuk A , Kakhanovskaya N , Merts S , Nemnyugin S , Roudnev V , Stepanova M 
Published: December 2020

Abstract
The BM@N (Baryonic Matter at the Nuclotron) is a working experiment at the NICA (Nuclotron-based Ion Collider fAcility) complex. The first physics runs with beams of argon and krypton (BM@N setup) as well as with beams of carbon (SRC setup - extension of the BM@N physics program) were carried in 2018. One of the prerequisites for physics analysis of experimental data is the existence of the primary vertex position estimation. Current report describes the proposed algorithm to reconstruct the primary vertex using the virtual planes method. The results of this algorithm for different targets, beams and trigger conditions are presented. The sensitivity of presented method to its parameters is considered.
Machine learning techniques for optimisation of track selection criteria
Authors: Altsybeev Igor , Andronov Evgeny , Prokhorova Daria 
Published: December 2020

Abstract
Application of machine learning (ML) algorithms in high-energy physics is evolving rapidly. In particular, they could be used for the optimization of track selection criteria in the analysis of experimental data on hadronic collisions. Using Monte Carlo simulations, one can train ML classifiers to separate correctly reconstructed primary tracks from secondary and fake tracks based on their features such as a number of clusters in TPCs, distance of closest approach to an interaction vertex etc. In this paper, we present the procedure of track selection optimization based on ML techniques and applied to EPOS1.99 simulations of proton-proton interactions obtained via Shine Offline Framework. With this approach, an increase of a fraction of the selected primary tracks and reduced contamination by the secondary tracks is obtained. In case of a complex geometry of an experimental facility like NA61/SHINE, improvement of track selection leads also to a widening of the kinematical acceptance.
The mechanism of domain walls and strings formation in the early Universe
Authors: Kirillov A A , Murygin B S 
Published: December 2020

Abstract
A classical dynamics of two real scalar fields within a model with a saddle point potential in (2+1)-space-time is discussed. We show that in this model, solitons may be formed both as domain walls and strings in three dimensional physical space. The formation and evolution of these field configurations are considered.
Measurement of single-spin asymmetry for charged pions in the SPASCHARM experiment at U70 accelerator
Authors: Abramov V V , Kalugin N K , Mochalov V V , Moiseev V V , Morozov D A , Novikov K D , Nurusheva M B , Oreshkov A O , Rykov V L , Semenov P A , Vasiliev A N 
Published: December 2020

Abstract
The SPASCHARM experiment at U70 aims an exploration of a fundamental problem in modern particle physics, the role of spin in strong interactions. At present, the first physics data have been accumulated at a negative 28 GeV beam, interacting with a frozen polarized proton target. The SPASCHARM wide-aperture spectrometer can detect both charged and neutral particles in the large solid angle with 2π azimuthal coverage in the fragmentation region of beam-particles. It covers the kinematic region of non-perturbative quantum chromodynamics (QCD), where the theoretical predictions are difficult and unreliable due to the full strength quark confinement at low and medium momentum transfers. In this report, the current status of the experiment is presented. The algorithm for reconstructing charged tracks is discussed along with its results on real data and the comparison with the Monte Carlo (MC) simulations. Based on a real track reconstruction, the statistical errors for the measurements of single-spin asymmetries in inclusive charged pion production are estimated. The data analysis is in progress.
Research on routing method of Multipath D2D Communication based on forward cellular network
Authors: Qu Huijie , Zhao Zhi 
Published: December 2020

Abstract
Traditional communication route selection methods find the shortest communication path based on graph theory, ignoring the influence of communication parameter changes on routing selection, resulting in excessive consumption of communication resources. In order to solve the above problems, a multi-channel D2D communication routing method based on Forwarding cellular network is proposed. Based on the establishment of D2D cooperative forwarding mechanism in cellular network, the mathematical model of multi-channel D2D routing is constructed by adding QoS index. In D2D, the multi-channel routing of D2D is calculated by mathematical model. The results show that the proposed routing method not only has low transmission delay, but also can control the resource loss within 15% with good reliability.
OTG: A Gateway for Cybersecurity in the Context of OPC UA PubSub Pattern
Authors: bu Tianyu , Liu Jiahao , Huang Jinfeng , Sun Zhigang 
Published: December 2020

Abstract
Under the background of industrial intelligence, OPC UA PubSub mode is strongly supported by Industry 4.0 as a protocol designed to meet the communication requirements of industrial control level. With the gradual opening of industrial control network, the PubSub security model in OPC UA protocol alone cannot meet the new security requirements under the background of OT and IT integration. According to the specification, we analyze the possible threats, impacts and countermeasures that PubSub may face in OPC UA deployment environment, and emphasized that PubSub security model is difficult to protect resource-constrained industrial field equipment from the harm caused by DoS and other attacks. In view of the limited resources of industrial control network, this paper proposes that OTG gateway provides protection for PubSub service. Compared with traditional security gateway, OTG gateway can greatly reduce the consumption of industrial control network resources by network attacks. In addition, according to the characteristics of PubSub protocol, a DoS detection algorithm for this architecture is proposed. Compared with the traditional DoS detection algorithm, it has better applicability to PubSub protocol and can detect DoS attacks more accurately to reduce the impact on device performance. Experiments show that the DoS detection algorithm has 100% accuracy and 0.13% false positive rate, and can detect DoS attacks faster than the traditional detection algorithm.
Strategies for Improving the Effectiveness of English Translation Teaching in Higher Vocational Colleges Based on Data Mining
Authors: Chen Jintian 
Published: December 2020

Abstract
At present, most vocational colleges have set up English majors accordingly, and translation is a compulsory course for English majors. Although some concrete measures have been taken to implement the teaching mode and method of translation teaching, there are still some problems in the practice of translation teaching. Higher vocational students have some misunderstandings in English translation, which requires teachers to improve teaching methods and promote students’ initiative to participate in teaching. How to change the position of translation teaching in higher vocational English teaching and improve the level of English translation teaching is a hot issue for all English teachers. Based on an in-depth analysis of the characteristics of English translation teaching in higher vocational colleges, this paper expounds in detail the strategies for improving the effectiveness of English translation teaching in higher vocational colleges based on data mining.