bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ossificação heterotópica após luxação pediátrica do cotovelo: Um relato de caso
Authors: Mansur Henrique , Bisol Roberto Luiz , Maranho Daniel Augusto 
Published: December 2021

ResumoA luxação do cotovelo é relativamente incomum em crianças, sendo que a maioria dos casos ocorre com fraturas associadas. A luxação isolada do cotovelo é relativamente rara, podendo implicar em uma maior probabilidade de lesões graves dos tecidos moles. Uma possível complicação é o desenvolvimento da ossificação heterotópica, que geralmente é assintomática, mas pode alterar o movimento articular. Descrevemos o caso de uma menina de 11 anos que sofreu luxação do cotovelo sem fraturas associadas, mas com ruptura parcial distal do músculo braquial. Após a redução fechada, a paciente desenvolveu ossificação heterotópica no terço distal anterior do úmero, com perda da amplitude do movimento articular do cotovelo. O tratamento cirúrgico, com excisão da ossificação heterotópica, por meio de uma abordagem lateral direta, proporcionou um excelente resultado. A ossificação heterotópica é uma possível complicação após luxação do cotovelo em crianças, sendo que a excisão cirúrgica mediante uma abordagem lateral é sempre uma opção de tratamento quando há limitação funcional. Antes de ser tomada a decisão cirúrgica, a maturação do processo de ossificação deve ser observada.
Kasai Procedure in Patients Older Than 90 Days: Worth a Cut
Authors: Uecker Marie , Kuebler Joachim F. , Schukfeh Nagoud , Pfister Eva-Doreen , Baumann Ulrich , Petersen Claus , Madadi-Sanjani Omid 
Published: December 2021

Abstract
Introduction Age at Kasai portoenterostomy (KPE) has been identified as a predictive factor for native-liver survival in patients with biliary atresia (BA). Outcomes of pediatric liver transplantation (LT) have improved over recent years. It has been proposed to consider primary LT as a treatment option for late-presenting BA infants instead of attempting KPE. We present our experience with patients older than 90 days undergoing KPE.
Materials and Methods A retrospective chart review of patients with BA undergoing KPE at our institution between January 2010 and December 2020 was performed. Patients 90 days and older at the time of surgery were included. Patients' characteristics, perioperative data, and follow-up results were collected. Eleven patients matched the inclusion criteria. Mean age at KPE was 108 days (range: 90–133 days).
Results Postoperative jaundice clearance (bilirubin < 2 mg/dL) at 2-year follow-up was achieved in three patients (27%). Eight patients (73%) received a liver transplant at a mean of 626 days (range: 57–2,109 days) after KPE. Four patients (36%) were transplanted within 12 months post-KPE. Two patients died 237 and 139 days after KPE due to disease-related complications. One patient is still alive with his native liver, currently 10 years old.
Conclusion Even when performed at an advanced age, KPE can help prolong native-liver survival in BA patients and offers an important bridge to transplant. In our opinion, it continues to represent a viable primary treatment option for late-presenting infants with BA.
A toy model for the auditory system that exploits stochastic resonance
Authors: Veronesi Francesco , Milotti Edoardo 
Published: December 2021

Abstract
The transduction process that occurs in the inner ear of the auditory system is a complex mechanism which requires a non-linear dynamical description. In addition to this, the stochastic phenomena that naturally arise in the inner ear during the transduction of an external sound into an electro-chemical signal must also be taken into account. The presence of noise is usually undesirable, but in non-linear systems a moderate amount of noise can improve the system’s performance and increase the signal-to-noise ratio. The phenomenon of stochastic resonance combines randomness with non-linearity and is a natural candidate to explain at least part of the hearing process which is observed in the inner ear. In this work, we present a toy model of the auditory system which shows how stochastic resonance can be instrumental to sound perception, and suggests an explanation of the frequency dependence of the hearing threshold.
The time substructure of jets and boosted object tagging
Authors: Klimek Matthew D 
Published: December 2021

Abstract
We propose the study of the time substructure of jets, motivated by the fact that the next generation of detectors at particle colliders will resolve the time scale over which jet constituents arrive. This effect is directly related to the fragmentation and hadronization process, which transforms partons into massive hadrons with a distribution of velocities. We review the basic predictions for the velocity distribution of jet hadrons, and suggest an application for this information in the context of boosted object tagging. By noting that the velocity distribution is determined by the properties of the color string which ends on the parton that initiates the jet, we observe that jets originating from boosted color singlets, such as Standard Model electroweak bosons, will exhibit velocity distributions that are boosted relative to QCD jets of similar jet energy. We find that by performing a simple cut on the corresponding distribution of charged hadron arrival times at the detector, we can discriminate against QCD jets that would otherwise give a false positive under a traditional spatial substructure-based boosted object tagger.
Status of the WEST travelling wave array antenna design and results from the high power mock-up
Authors: Ragona R. , Durodié F. , Messiaen A. , Ongena J. , Van Schoor M. , Agzaf S. , Batal T. , Bernard J.-M. , Courtois X. , Delaplanche J.-M. , Dumont R. , Durand F. , Faisse F. , Firdaouss M. , Gargiulo L. , Garibaldi P. , Hillairet J. , Hoang T. , Lombard G. , Mollard P. , Chen Z. , Song Y. , Xu H. , Yang Q. , Yu C. 
Published: December 2021

Abstract
This paper presents the current status of the WEST TWA antenna, its mock-up and a possible extrapolation to DEMO. The updated WEST TWA design has a reduced antenna length and features feeding and mechanical support from a single vessel port. A mock-up of the WEST TWA antenna was designed in 2019, manufactured during 2020 and installed in the TITAN test facility at the beginning of 2021. The results of the mock-up at low and high power, its diagnostic system and the prospects are explained. Extensions towards a TWA antenna for WEST and a possible TWA system for the future DEMO tokamak reactor are briefly discussed.
On the proper choice of datasets and traffic features for real-time anomaly detection
Authors: Callegari C , Giordano S , Pagano M 
Published: December 2021

Abstract
Thanks to its ability to face unknown attacks, Anomaly-based Intrusion Detection is a key research topic in network security and different statistical methods, fed by suitable traffic features, have been proposed in the literature. The choice of a proper dataset is a critical element not only for performance comparison, but also for the correct identification of the normal traffic behaviour. In this paper we address the general problem of selecting traffic features from recent real traffic traces (MAWI data set) and verify how the real-time constraint impacts on the general performance. Although a state-of-the-art IDS (Intrusion Detection System) based on deep neural networks is considered, our conclusions can be extended to any anomaly detection algorithm and advocate for a fair comparison of IDSs using representative datasets and traffic features that can be extracted on-line (and do not depend on the entire dataset).
The calibration method of a tandem queueing model with PH service time using NS-3 simulation of a multihop wireless network
Authors: Larionov A A , Mukhtarov A A , Sokolov A M 
Published: December 2021

Abstract
End-to-end delay is one of the key characteristics of communication network performance. This characteristic determines the possibility of using the network for various delay-critical applications like voice or video transmission. One of the widely used approaches to estimating delays is the use of the queuing theory. According to this approach, a telecommunication network is modeled using a multiphase queuing system. Communication channels are modeled using service devices, and the incoming traffic is modeled with random distributions of the inter-arrival intervals between packets. The accuracy of this network model directly depends on how well the service time distributions are chosen. These distributions must consider the specifics of complex telecommunication protocols, size distributions of the transmitted packets, and, in case of wireless channels, the rate of collisions and retransmissions. The paper presents a study of the accuracy of estimates of end-to-end delays in a multi-hop wireless network using a queuing network with a phase-type (PH) service time distributions. To calibrate the model, PH distributions are found using the moments-matching method based on sample data on the duration of packet transmission in IEEE 802.11 channels. This sample data was obtained using a simulation model written in NS-3, taking into account the features of the IEEE 802.11 protocol and the presence of collisions in the network. To evaluate the accuracy, end-to-end delays are calculated using the queuing network and the wireless network simulation model. It is shown that it is possible to obtain reasonably accurate estimates for small networks, but with an increase in the size of the network, the accuracy decreases. In conclusion, recommendations are given to improve the accuracy of modeling.
Mathematical model for reliability indicators calculation of tethered UAV hybrid navigation system
Authors: Vishnevsky V M , Vytovtov K A , Barabanova E A , Buzdin V E 
Published: December 2021

Abstract
The mathematical model for reliability indicators calculation of the hybrid navigation system containing microwave and technical vision subsystems is proposed in this paper for the first time. The proposed method is based on the translation matrix concept of solutions to the Kolmogorov equation system and it allows us to obtain the mathematical expression of availability factor, downtime ratio, and other reliability indicators. Also the presented approach allows finding the reliability indicators for the cases of jump change of transition intensities caused by external influences. Besides the analytical method can be used for investigation of hybrid navigation system transient mode functioning. The results of the numerical calculations clearly demonstrated correctness of the proposed approach.
Challenges in design of an on-board power supply system for a tethered unmanned aerial telecommunication platform
Authors: Vishnevsky V M , Morozov V P , Alikin K A 
Published: December 2021

Abstract
The increasing demand for tethered unmanned aerial platforms in various fields and applications, particularly in telecommunications, leads to growing requirements for the amount and quality of electrical power supplied on board. The paper explores the challenges in hardware, electronic and circuit design of the systems that supply power to the equipment installed on tethered aerial platforms. The arguments for implementing a two-stage DC voltage conversion are provided. In the study the expressions for static and dynamic parameters of the on-board bus voltage regulator and stability conditions for the first stage stabilizer with multiple feedback loops were determined. Additionally, the design of the error signal generation circuit is provided.
Visual odometry in local underwater navigation problems
Authors: Azhmukhamedov I M , Tamkov P I , Svishchev N D , Rybakov A V 
Published: December 2021

Abstract
The work processes of the ORB-SLAM algorithm are presented. The results of experimental studies on temporal comparisons of the operation of the algorithm with different parameters and cameras are presented. The necessity of forming a visual odometry (VO) system as a local navigation of remote-controlled and autonomous underwater robots has been substantiated. The two most suitable odometry methods in the underwater environment are described, such as their advantages and disadvantages. The work processes of the ORB-SLAM algorithm are presented. The results of experimental studies on temporal comparisons of the operation of the algorithm with different parameters and cameras are presented. The procedure for preparing video data is described: processing a video stream, adjusting camera parameters for calibration. The experiments represent the testing of the ORB-SLAM3 algorithm on a sample of video filmed as part of the ecological monitoring of the Caspian shelf in 2020.
Algorithm for dynamic formation of a single raster photo map of the seabed during the movement of an autonomous underwater vehicle
Authors: Timoshenko A A , Zuev A V , Mursalimov E S 
Published: December 2021

Abstract
An algorithm has been developed for creating a single raster map of the seabed from photos obtained from vertically downward cameras of autonomous underwater vehicles (AUV) using tile graphics. The images obtained during the movement of AUV are combined into a single scalable photo map, divided into square segments (tiles). This representation of graphical information allows to quickly access the images with specialized tools after lifting the AUV to the surface and reduce the time spent by the operator to analyze the results of the mission. The images were combined using simple geometric transformations based on the data received from the navigation systems of the underwater vehicle and the parameters of its camera. The efficiency of the algorithm was tested on real data taken from a marine expedition.
3D-modeling of Augmented Reality objects using Shi-Tomasi corner detection algorithms
Authors: Demidenko O M , Aksionova N A , Varuyeu A V , Kucharav A I 
Published: December 2021

Abstract
This article covers development of the Python-based software module for Blender 3D, as well as it covers research of Shi-Tomasi corner detection algorithm using the developer’s construction documents. The corners detected may be used for further three - dimensional modelling, replanting not requiring adjustment of the construction documents, or may be used for retrieval of the accurate data.
Analysis of transport supply and demand based on convolutional neural networks
Authors: Lezhnina Yu. A. , Maltseva N. S. 
Published: December 2021

Abstract
The paper describe a solution of the problem of increasing the accuracy of calculating potential transport and pedestrian activity in the context of a shortage of marked data by using a geosocial approach. The advantages of the proposed model are the presence of a high number of degrees of freedom, which allows to flexibly configure the model based on the problem being solved. The authors note that the application of the approach according to the methodology proposed in the article to solve the problem of improving the efficiency of classifying pedestrian transport network data requires an individual project approach to the formation of initial data for analysis. We formulate a hypothesis that the accuracy of the forecast of transport demand and supply can be increased if the classifying model takes into account and analyses not only the properties of a particular territory, but also the characteristic features of the systems with which it interacts. Hexagons and heat maps were chosen for the classification of territories. A feature of the proposed approach is the unification and simplification of the neural network architecture..
Application of a computer vision system for recognizing tomato fruits and determining their position relative to the gripper device of the harvesting robot
Authors: Rybakov A.V. , Marenkov A.N. , Kuznetsova V.A. , Stanishevskaya A.V. 
Published: December 2021

Abstract
The article presents a method for recognizing tomato fruits covered with foliage, de-termining their centers and boundaries using the OpenCV computer vision library and a hardware complex based on Raspberry Pi 4. The methods for solving the inverse kinematics problem for the five-link robotic manipulator designed by the authors, installed on a mobile plat-form, in order to create a robot for collecting fruits are considered. The simulation of the manipulator movement in the Scilab environment is performed.
Numerical simulation of non-Newtonian Carreau fluid in a lid-driven cavity
Authors: Shuguang Li 
Published: December 2021

Abstract
In this work, the 2D lid-driven cavity flow of non-Newtonian Carreau fluids has been studied by finite difference method on a staggered grid. A finite-difference algorithm on staggered grid based on projection method is adopted to solve the lid-driven cavity flow, which includes a second-order central difference scheme for the non-Newtonian viscous stress term. This study has been conducted for the certain pertinent parameters of Reynolds number (Re=100-1000), power-law index (n=0.6-1.4). The results show that as the Reynolds number increases, the influence of the power-law index on the flow increases. As the power-law index decreases, the flow field becomes more complicated.
Isolation of the singular part of the electromagnetic field scatteredby objects with sharp edges and conic points
Authors: Bogolyubov A N , Mogilevsky I E , Rovenko V V 
Published: December 2021

Abstract
In this article we propose a method for overcoming a number of problems that may arise when solving scattering problems on objects of complex structure. This approach can be used for mathematical and numerical modeling of waveguide, emitting and scattering systems of various complexity.
Modelling of epitaxial growth of two-dimensional film
Authors: Vinarskiy V P , Kokhanenko A P , Lozovoy K A 
Published: December 2021

Abstract
The study is devoted to the theory of epitaxial growth of two-dimensional materials (in particular, the group IV elements) and its applications in creating a virtual program for modeling this growth by the molecular beam epitaxy (MBE) method.
Numerical simulation of the frequency response and phase response of combined UWB antennas in the receiving-transmitting mode
Authors: Andreev Yu A , Kuznetzova E A , Plisko V V 
Published: December 2021

Abstract
Results of a simulation and experimental study of a combined ultra-wideband antenna, which is a combination of electric and magnetic dipoles, are presented. The input signal recovery of the transceiver path of combined antennas made by the MathCad code and the experimental one were compared. The reconstruction took place according to the frequency and phase responses of the transceiver path of these antennas.
Model of a single-electron transistor based on endohedral fullerene (Sc3N)@C80
Authors: Duisenova A G , Sergeyev D M 
Published: December 2021

Abstract
In this work within the framework of the density functional theory and the method of nonequilibrium Green’s functions the dependences of the total energy of molecules C80-SET and (Sc3N)@C80 - SET on their total charge, the dependence of the total energy from the gate voltage and the stability diagram of the single-electron transistor have been determined. It is noted that for transition to switch to on mode (Sc3N)@C80-SET it is necessary to apply the gate voltage in the range from 0.019 ≤ VG ≤ 5.940 with the bias voltage -2.040 ≤ VSD
≤ 2.155 V. Considering that at values of bias voltage equal to –0.381 ≤ VSD ≤ 0.533 V there is no voltage on the substrate (VG = 0 V) and electric current does not flow. It is shown that the total energy at negative values of charge is higher than at positive charges and that the area of the Coulomb rhombus in fullerene with scandium nitride is 5.3 times larger than in “pure” fullerene.
Communication based on scattered laser radiation in a medium with high turbidity or in the presence of a noise source
Authors: Poznakharev E S , Belov V V , Tarasenkov M V , Fedosov A V , Abramochkin V N 
Published: December 2021

Abstract
The results of laboratory studies of an optical communication channel based on scattered radiation in the Big Aerosol Chamber of IAO SB RAS in a clean atmospheric environment, in the case of the chamber filled with vapor of the water-glycerin mixture, and in the presence of an noise laser source are analyzed. It is found that with the non-coplanar communication geometry in the chamber filled with the water-glycerin mixture, stable data transmission is possible with the azimuthal angle of orientation of the detector optical axis up to 5°. The error probability in the communication channel increases more slowly with an increase of the detector elevation angle in the chamber filled with the water-glycerin mixture than that in the chamber without this mixture does. The presence of an interfering laser radiation at a wavelength λ = 510 nm in the communication channel affects the communication quality. When the power of the noise laser source achieves 70 mW, the maximal error probability corresponds to 0.02.
Stabilization of the backward wave oscillator frequency for operation with high quality resonators
Authors: Shansho A , Dunaevsky G E , Dorofeev I O , Badin A V , Emelyanov E V 
Published: December 2021

Abstract
This article describes the performance of a backward wave oscillator, stabilized with phase locked loop. The backward wave oscillator is locked to the frequency of a direct digital synthesizer using an automatic phase locked loop. The direct digital synthesizer is playing the role of tuning part in the suggested frequency synthesizer. Mathematical evaluations of the stability, phase noise and locking speed of the suggested frequency synthesizer are obtained. The optimization technique of frequency synthesizers parameters is presented. This allows to get the maximum response speed and the lowest phase noise and level of spurious with fine tuning (less than 1 Hz). It was shown that the order and type of loop filter in the frequency synthesizer will affect simultaneously the response speed, phase noise and spurious level. The results of this paper shows that the frequency synthesizer can be used in small samples properties measurement using open resonators.
Broadband selection of EHF radiation of metamaterial surface obtained by photolithography
Authors: Bilinskiy K V , Dorozhkin K V , Moskalenko V D , Kuleshov G E , Badin A V , Trofimov E A , Berdyugin A I 
Published: December 2021

Abstract
In paper results of research of metamaterial surface based on split-ring resonators obtained by photolithography are presented. Numerical simulation of electromagnetic response of the created structure are shown. Experimental researches of the transmission coefficient using quasi-optical methods of continuous and time-domain spectroscopy in the frequency range from 34 to 200 GHz were carried out. Area of broadband screening in the EHF range has been found.
Grouping of particles in a wideband ultrasonic field
Authors: Sukhanov D Y , Rosliakov S N 
Published: December 2021

Abstract
In this paper, we propose to expand the capabilities of wideband levitation and show the possibility of forming a structure of a complex shape based on focusing a wideband field in a given area. Focusing the field of planar radiating arrays makes it possible to form a region of stable levitation in a plane parallel to the arrays. The counter radiation of the two arrays creates a standing wave, at the nodes of which the particles are grouped. The use of a wideband signal makes it possible to create many stable nodes of standing waves in specified areas, and to realize the required shape of the levitating object. Simultaneous monitoring of multiple particles in a wideband ultrasonic field may become a new direction in the development of methods of acoustic trapping and control of particles, as well as technologies of acoustic tweezers.