bluuebunny/crossref_metadata_2025_split huggingface dataset:
Magnetotransport in hybrid InSe/monolayer graphene on SiC
Authors: Wang Chih-Yuan , Lin Yun-Wu , Chuang Chiashain , Yang Cheng-Hsueh , Patel Dinesh K , Chen Sheng-Zong , Yeh Ching-Chen , Chen Wei-Chen , Lin Chia-Chun , Chen Yi-Hsun , Wang Wei-Hua , Sankar Raman , Chou Fang-Cheng , Kruskopf Mattias , Elmquist Randolph E , Liang Chi-Te 
Published: December 2020

Abstract
The magnetotransport properties of a hybrid InSe/monolayer graphene in a SiC system are systematically studied. Compared to those of its bare graphene counterpart, in InSe/graphene, we can effectively modify the carrier density, mobility, effective mass, and electron–electron (e–e) interactions enhanced by weak disorder. We show that in bare graphene and hybrid InSe/graphene systems, the logarithmic temperature (lnT) dependence of the Hall slope R
H = δR

xy
/δB = δρ

xy
/δB can be used to probe e–e interaction effects at various temperatures even when the measured resistivity does not show a lnT dependence due to strong electron–phonon scattering. Nevertheless, one needs to be certain that the change of R
H is not caused by an increase of the carrier density by checking the magnetic field position of the longitudinal resistivity minimum at different temperatures. Given the current challenges in gating graphene on SiC with a suitable dielectric layer, our results suggest that capping a van der Waals material on graphene is an effective way to modify the electronic properties of monolayer graphene on SiC.
Novel electro self-assembled DNA nanospheres as a drug delivery system for atenolol
Authors: Elkayal Rehab , Motawea Amira , Reicha Fikry M , Elmezayyen Ayman S 
Published: December 2020

Abstract
We describe new method for preparing DNA nanospheres for a self-assembled atenolol@DNA (core/shell) drug delivery system. In this paper, we propose the electrochemical transformation of an alkaline polyelectrolyte solution of DNA into DNA nanospheres. We successfully electrosynthesized DNA nanospheres that were stable for at least 2 months at 4 °C. UV–visible spectra of the prepared nanospheres revealed a peak ranging from 372 to 392 nm depending on the DNA concentration and from 361 to 398.3 nm depending on the electrospherization time. This result, confirmed with size distribution curves worked out from transmission electron microscopy (TEM) images, showed that increasing electrospherization time (6, 12 and 24 h) induces an increase in the average size of DNA nanospheres (48, 65.5 and 117 nm, respectively). In addition, the average size of DNA nanospheres becomes larger (37.8, 48 and 76.5 nm) with increasing DNA concentration (0.05, 0.1 and 0.2 wt%, respectively). Also, the affinity of DNA chains for the surrounding solvent molecules changed from favorable to bad with concomitant extreme reduction in the zeta potential from −31 mV to −17 mV. Principally, the attractive and hydrophobic interactions tend to compact the DNA chain into a globule, as confirmed by Fourier transform infrared spectroscopy (FTIR) and TEM. To advance possible applications, we successfully electro self-assembled an atenolol@DNA drug delivery system. Our findings showed that electrospherization as a cost–benefit technique could be effectively employed for sustained drug release. This delivery system achieved a high entrapment efficiency of 68.03 ± 2.7% and a moderate drug-loading efficiency of 3.73%. The FTIR spectra verified the absence of any chemical interaction between the drug and the DNA during the electrospherization process. X-ray diffraction analysis indicated noteworthy lessening in atenolol crystallinity. The present findings could aid the effectiveness of electrospherized DNA for use in various other pharmaceutical and biomedical applications.
A commercial treatment planning system with a hybrid dose calculation algorithm for synchrotron radiotherapy trials
Authors: Day L R J , Donzelli M , Pellicioli P , Smyth L M L , Barnes M , Bartzsch S , Crosbie J C 
Published: December 2020

Abstract
Synchrotron Radiotherapy (SyncRT) is a preclinical radiation treatment which delivers synchrotron x-rays to cancer targets. SyncRT allows for novel treatments such as Microbeam Radiotherapy, which has been shown to have exceptional healthy tissue sparing capabilities while maintaining good tumour control. Veterinary trials in SyncRT are anticipated to take place in the near future at the Australian Synchrotron's Imaging and Medical Beamline (IMBL). However, before veterinary trials can commence, a computerised treatment planning system (TPS) is required, which can quickly and accurately calculate the synchrotron x-ray dose through patient CT images. Furthermore, SyncRT TPS's must be familiar and intuitive to radiotherapy planners in order to alleviate necessary training and reduce user error. We have paired an accurate and fast Monte Carlo (MC) based SyncRT dose calculation algorithm with EclipseTM, the most widely implemented commercial TPS in the clinic. Using EclipseTM, we have performed preliminary SyncRT trials on dog cadavers at the IMBL, and verified calculated doses against dosimetric measurement to within 5% for heterogeneous tissue-equivalent phantoms. We have also performed a validation of the TPS against a full MC simulation for constructed heterogeneous phantoms in EclipseTM, and showed good agreement for a range of water-like tissues to within 5%–8%. Our custom EclipseTM TPS for SyncRT is ready to perform live veterinary trials at the IMBL.
Nonlinear Thomson scattering from a tightly focused circularly polarized laser with varied incident-pulse durations
Authors: Wang Yiqiu , Wang Conglin , Zhou Qinyan , Li Lingxiao , Tian Youwei 
Published: December 2020

Abstract
In this paper, nonlinear Thomson scattering in an intense (

a
0

=
6

) tightly focused (

b
0

=
3

μ

m

) Gaussian laser pulse is theoretically and numerically investigated to demonstrate varying spatial characteristics in the few-cycle and multi-cycle domains. We find that within ultrashort incident laser pulses, electrons have the potential to radiate a single attosecond pulse with a large signal-to-noise ratio, which turns into a train of attosecond pulses with a multi-cycle laser. Furthermore, a novel asymmetry phenomenon is discovered for the first time in the few-cycle domain whereby spatial radiation lasts for only one circle with apparent peaks and valleys, in contrast to the helical radiation pattern apparent in the multi-cycle domain, which gradually turns into a common fourfold-symmetry pattern. This means that the difference between tightly and non-tightly focused laser pulses can be bridged utilizing an appropriate incident pulse duration under specific conditions. The above difference is demonstrated again in the polar plane, where electrons change from a light-spot to a light-band radiation feature when the incident pulse duration increases.
Computer simulation of traffic flows
Authors: Kasatkina E V , Vavilova D D 
Published: December 2020

Abstract
The paper is presented to the simulation of traffic flows in conditions of traffic light regulation. A simulation multi-agent model of traffic flows was developed, which includes three agents: a car, a traffic light, a generator. A computational algorithm for the movement of vehicles for imitating the movement of vehicles along the driving lanes and its behavior at the intersection was developed. The simulation multi-agent model and the computational algorithm are implemented in the form of an intelligent analytical system that includes a database designed in the MS SQL DBMS environment, as well as a visualization module. During the simulation of traffic flows in the system, the required output parameters of the model are fixed. By simulation tools one of the problematic road sections of the city of Izhevsk was built, including a network of intersections of 10 years of October Street, Udmurtskaya Street, Pushkinskaya Street. The developed simulation model allows calculating the indicators of the average queue length at different times of the day, taking into account the intensity of input traffic flows. Thus, graphs of the dynamics of changes in the average queue length can be obtained and, on their basis, the time periods of congestion occurrence are determined. For example, during the simulation of the operation of a section of the transport network of the city of Izhevsk, it was established that there are two time periods for the occurrence of traffic congestion: from 7:00-9:00 AM and 5:00-7:00 PM, in which the indicator of the maximum queue length reaches 40 cars.
Method for the Blind Estimation of Power Coefficients in PD-NOMA Systems
Authors: Kryukov Ya V , Pokamestov D A , Rogozhnikov E V , Movchan A K , Kvashnina A S 
Published: December 2020

Abstract
A method of power domain non-orthogonal multiple access with user channel multiplexing is a promising approach for organizing multichannel communication in modern digital wireless systems. Generation of a non-orthogonal group signal involves the superposition of user signals with different weight power coefficients in a single frequency-time resource segment. Decoding such a signal at the receiver requires the information about the weights used in multiplexing. This information is transmitted in control channels and provides additional load on the data network, which in turn reduces its effectiveness. A blind estimation method of power coefficients is proposed to solve this issue. A simulation model has been developed to study proposed method. Simulation resulted in the dependence of the blind estimation of power coefficients error on the signal-to-noise ratio in the transmission channel and on the signal sample length. The result of the study showed that the blind estimation of power coefficients insignificantly worsens the probability of a bit error when decoding a group non-orthogonal signal. Despite this, the proposed blind estimation method can be considered in an attempt to optimize control channel traffic.
Description and implementation of the Supersonic Shear Imaging method on the Verasonics research system
Authors: Spivak A E , Demin I Yu 
Published: December 2020

Abstract
The method of shear wave elastography Supersonic Shear Imaging is presented. A scheme for implementing this method on the Verasonics research system and an algorithm for processing and outputting data as an elasticity map are developed. Physical modelling was carried out with a CIRS model 049 elasticity phantom on the Verasonics research system using SSI and SWEI methods, and on the Supersonic Aixplorer ultrasound system. The results were compared and shown the method presented to be applicable for the research system.
Hybrid modelling of the RED algorithm in the Julia language
Authors: Apreutesey A M Yu , Korolkova A V , Kulyabov D S 
Published: December 2020

Abstract
This work is devoted to studying the possibilities of hybrid modeling of communication network algorithms in the Julia programming language. A simulation of the system, which consists of an incoming stream processed according to the Transmission Control Protocol (TCP) and a router processing traffic according to the Random Early Detection (RED) algorithm, is carried out. This model contains both continuous and discrete elements, for example, a discrete probability function of random packet dropping in the case of queue congestion.
Dispatching method of incoming events for ERP system based on analysis of emails using artificial intelligent technique
Authors: Shirokov S A , Rypalov A J 
Published: December 2020

Abstract
The article describes a method for solving automatic dispatching problem of incoming events in ERP systems received from incoming emails via external mail programs by using artificial intelligent processing. Realization include recognition of client appeal subject, selecting key information and transferring it to enterprise business processes through creation of tasks. In this research, was developed program module for ERP system based on “1C: Enterprise” platform and integrated with an external mail application and neural network oriented to natural language recognition. As a result, it made possible to embed that mechanism into business processes engine of the information system and solve the problem in practice.
Nucleation of nano-islands of pure components during growth of a multicomponent crystal via step-flow mode
Authors: Redkov A V , Kukushkin S A 
Published: December 2020

Abstract
The work is devoted to an analysis of the processes taking place at the surface of the multicomponent crystal during its growth via step-flow mode. It is shown, that at certain conditions nucleation of pure components in a form of nanoislands can take place at the terraces between the steps. The mechanism of formation of such islands is discussed. The criterion for the conditions at which such nucleation takes place is derived.
On the synthesis of the carboxylated graphene via graphene oxide liquid-phase modification with alkaline solutions
Authors: Ryzhkov S A , Rabchinskii M K , Shnitov V V , Baidakova M V , Pavlov S I , Kirilenko D A , Brunkov P N 
Published: December 2020

AbstractIn this work we present a facile method for the synthesis of the carboxylated graphene derivate. The resulting material contains up to 10.9 at.% of carboxyl groups and with negligible content of other oxygen-containing groups. Moreover, formation of large round-shaped nanoscale holes is observed due to the applied synthesis process. The synthesized graphene derivative is of high interest for the sensing applications due to combination of its conductive nature and chemical reactivity provided by the attached carboxyl groups.
Effect of substrate temperature on morphology and properties of ZnO:In nanocrystalline films grown by PLD
Authors: Geldash A A , Vakulov Z E , Dzhuplin V N , Ageev O A 
Published: December 2020

Abstract
The purpose of this work is to study the formation regularities of ZnO:In nanocrystalline films grown by pulsed laser deposition (PLD) for application as contact layers of photosensitive elements. It was found that increasing in the substrate temperature from 300 °C to 400 °C the films have a continuous granular structure with a grain size of 9±2 nm and 13.5±4.5 nm, respectively. The sample obtained at the substrate temperature of 150 °C is characterized by the presence of whisker-like structures with 200±47 nm long and 12±8 nm wide on the film’s surface. With increasing substrate temperature from 150 °C to 400 °C, the value of resistivity decreases from 9.3·10−1 Ω·cm to 2.9·10−2 Ω·cm, the concentration of current carriers increases from 2.12·1018 cm−3 to 3.5·1019 cm−3, and the mobility of current carriers also increases from 2.51 cm2/(V·s) to 6.17 cm2/(V·s). The results obtained can be used in the development and manufacture of highly efficient photoelectric converters based on hybrid nanostructures.
Fractional circuit model for supercapacitors with polyaniline/carbon nanotube composite-based electrodes
Authors: Yavtushenko I. O. , Sibatov R. T. , Somov A. I. , Makhmud-Akhunov M. Yu. 
Published: December 2020

Abstract
Supercapacitors with polyaniline/multiwalled carbon nanotube (PANI/MWCNT) composite-based electrodes are fabricated and studied. The cases of electrodes with randomly distributed and vertically aligned MWCNTs are considered. The measured discharge curves demonstrate the presence of memory effect in studied devices. The fractional-order equivalent circuit model is proposed to describe the impedance spectra.
Observation of the influence of complex SiC porous buffer layer on properties of GaN/Si(111) heterostructures
Authors: Zolotukhin D , Goloshchapov D , Lenshin A , Mizerov A , Arsentyev V , Seredin P 
Published: December 2020

Abstract
1-μm-thick GaN layers were obtained in one growth procedure on compliant SiC/Si(111) substrates using plasma-assisted molecular beam epitaxy (PA MBE). Si(111) substrates were modified by the atoms substitution technique. Prior to the atoms substitution procedure, on the one substrate, the transition porous Si layer (por-Si) was performed. The GaN layer grown on this substrate revealed better surface morphology and structural quality, less threading dislocation density, and as a result, showed lower free carrier concentration and higher carrier mobility. Moreover, the XRD study revealed less strain level in the GaN layer grown on the por-Si layer.
Catalytic properties of nanostructured nickel-containing pectin biopolymers on a glassy carbon surface
Authors: Kholin K V , Shirobokov V P , Nizameev I R , Minzanova S T , Kadirov M K 
Published: December 2020

Abstract
Searching for new ways of converting carbon dioxide into value-added products, such as fuels, is a relevant task of our time. Electrochemical reduction of carbon dioxide to carbon monoxide, hydrocarbons and alcohols is considered as one of the main approaches in this area. One of the most advanced approaches is the use of coordination polymers for homogeneous and heterogeneous catalysis of carbon dioxide reduction. We obtained coordination pectin biopolymers with different nickel ions contents (PG-NaNi). The structure and composition of the obtained biopolymers were characterized by such physicochemical methods as IR and ICP-AE spectroscopy. Morphology of PG-NaNi on a glassy carbon surface provides very high surface to volume ratio. Cyclic voltammetry on the modified glassy carbon working electrode in water solution saturated with carbon dioxide shows catalytic properties of PG-NaNi for CO2 reduction reaction.
Revealing nucleoplasm mechanics by optical trapping and Brownian motion of nucleolus within mouse GV-oocytes in vivo
Authors: Syrchina M S , Shakhov A M , Aybush A V , Zalessky A D , Nadtochenko V A 
Published: December 2020

Abstract
Optical trapping of nucleoli within nucleoplasm of living oocytes as unique model system provides non-invasive technique for investigation of nuclear environment. We employed methods of active and passive rheology to characterize rheological properties of the nucleoplasm of GV-oocytes (germinal vesicle stage) with main types of chromatin distribution in the nucleus (NSN, SN). By using of single beam optical trap, formed by a tightly focused laser radiation at 790 nm wavelength, we performed subsequent stress-relaxation tests series of nucleoli in various directions and with different amplitudes. Nucleolus of the oocyte was employed as a microprobe due to its large size and spherical shape. The characteristic nucleolus relaxation times were obtained for two types of chromatin distribution, which can subsequently be used to evaluate the viscoelastic properties of the nuclear material within oocytes with different physiological states. Motion activity of nucleoli was also extracted to evaluate local forces, acting within nucleolar environment and facilitating chromatin redistribution.
Multi-electrode silicon microprobes fabrication process for brain-computer interface
Authors: Gusev E Yu , Jityaeva J Y , Malohatko S V , Ageev O A 
Published: December 2020

Abstract
Multi-electrode microprobes fabrication process based on silicon substrate was developed using surface micromachining and anisotropic wet etching. The process flow consists of 20 main operations, including 4 lithography steps using 4 photomasks. The minimum size of the elements is 2 μm. The effect of the solution concentration (from 10 to 40% at 80°C) on the etching rate and surface roughness was studied. The optimal value of solution concentration leading to the formation of surface with the lowest root mean square roughness value was determined. The etching rates of monocrystalline silicon (100) face and silicon oxide were 1.5 μm/min and 10 nm/min, respectively. Rapid thermal annealing at 600 °C for 3 min increased the resistance of silicon oxide to the action of an alkaline solution by 2 times. As a result, the neural probe structure including two microprobes and electrical interface of 10 electrodes was fabricated.
Development of a technology for producing thin-film structures based on TiO2 and ZrO2 oxides by gas thermal oxidation
Authors: Rodionov I , Proskuryakov V , Perinskaya I , Kuts L 
Published: December 2020

Abstract
A new highly efficient method for gas-thermal oxidation of VT6 bioinert titanium alloy with a dosed feed of ultrafine TiO2/ZrO2 particles into the treatment zone has been developed. A physical model for the formation of thin-film oxide heterostructures modified with TiO2/ZrO2 powders has been developed. A set of physicomechanical properties and surface characteristics of oxidized titanium samples was experimentally studied. Electron microscopic studies and microhardness measurements of the synthesized film coatings were performed. A high-tech electric furnace device has been developed for the implementation of gas thermal oxidation with the simultaneous dosed supply of fine powder materials into the working chamber of the furnace.
1.55 µm range edge-emitting laser diodes based on InGaAs/InGaAlAs superlattice and InGaAs quantum wells
Authors: Rochas S S , Novikov I I , Babichev A V , Gladyshev A G , Kolodeznyi E S , Karachinsky L Ya , Bobretsova Yu K , Klimov A A , Shernyakov Yu M , Zhukov A E , Egorov A Yu 
Published: December 2020

Abstract
Two laser heterostructures with active region based on seven InGaAs quantum wells and on InGaAs/InGaAlAs superlattice were grown on InP substrates by molecular beam epitaxy. Both active regions were designed for vertical-cavity surface-emitting lasers of 1535-1565 nm spectral range and had total thickness about 80-90 nm. Characteristics of edge-emitting laser diodes fabricated from grown laser heterostructures were studied and compared.
Investigation of the elimination kinetics of low and middle molecular weight uremic markers during hemodialysis treatment with the optoelectronic multispectral sensor
Authors: Konoplev G A , Stepanova O S , Zemchenkov G A , Korsakov V , Kuznetsov A , Frorip A 
Published: December 2020

Abstract
The elimination kinetics of conventional low-molecular weight uremic markers and advanced glycation end products (AGE products), which are considered as a possible middle molecular weight marker of uraemia in hemodialysis (HD) patients, was investigated by direct ultraviolet (UV) absorption spectroscopy of waste dialysis fluid. Light emitting diodes (LED) were exploited as quasi-monochromatic light sources in the deep UV spectral region for measuring optical transmission at the wavelengths 285 nm (the maximum of uric acid UV absorption) and 365 nm (the maximum of AGE absorption band). Optical absorption of waste dialysate was monitored during multiple HD sessions for a group of patients; the double-pool model of elimination kinetics was used for the curve fitting and approximation. It was revealed that kinetic behaviour of AGE products is almost not different comparing with uric acid and other conventional clinically proved uremic markers.
Drift-diffusion simulation of photodetector with controlled relocation of carrier density peaks
Authors: Pisarenko I V , Ryndin E A , Isakov I D 
Published: December 2020

Abstract
A photodetector with controlled relocation of carrier density peaks is a promising optoelectronic device designed for the operation as a part of on-chip optical interconnections together with a high-speed laser-modulator. Previously, we estimated the back-edge performance of the sensor using a combined quantum-mechanical model that had not taken into account certain physical aspects of charge carrier transport in the device structure. In this paper, we propose a two-dimensional drift-diffusion model allowing for the comprehensive analysis of transients in the photodetector with controlled relocation within the semiclassical approach. To implement the model, we develop a technique of finite difference numerical simulation and applied software. The obtained simulation results enable us to clarify the operation mode and connection principle of the photodetector with controlled relocation and to improve its performance through the formation of special carrier-holding layers.