bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dual functions of alternating current electroluminescent device for light emission and humidity detection
Authors: Saengsonachai Alisa , Seekaew Yotsarayuth , Traiwatcharanon Pranlekha , Wongchoosuk Chatchawal 
Published: June 2022

Abstract
Alternating current electroluminescent (AC-EL) device can be considered as a potential candidate for next generation of multifunctional light-emitting sources. In this work, we present a new design of AC-EL device with inclusion of a silver oxide humidity-sensing layer instead of an insulating buffer layer for humidity detection. The ZnS:Cu, Cl and ZnS:Ag+(Zn,Cd)S:Ag phosphors were used as an emissive layer prepared by screen printing method. The silver oxide (AgO/Ag2O) nanoparticles synthesized via a green method were employed as a humidity sensing layer. The developed AC-EL devices exhibited high response, good productivity, high stability, high repeatability and linear relationship with humidity in range of 10%–90% RH as well as no significant effects with several VOCs/gases such as NH3, CO2, acetone, methanol, toluene and propan at room temperature. The effects of parameters such as excitation frequency, applied voltage, and waveforms on the luminance intensity are discussed. The development of the present AC-EL device offers a simplified architecture to enable sensing functions of the AC-EL device via monitoring of light emission changing.
Transit-guided radiation therapy: proof of concept of an on-line technique for correcting position errors using transit portal images
Authors: Latorre-Musoll Artur , Delgado-Tapia Paula , Gisbert María Lizondo , Sala Núria Jornet , Sempau Josep 
Published: June 2022

Abstract

Objective. Transit in vivo dosimetry methods monitor that the dose distribution is delivered as planned. However, they have a limited ability to identify and to quantify the cause of a given disagreement, especially those caused by position errors. This paper describes a proof of concept of a simple in vivo technique to infer a position error from a transit portal image (TPI). Approach. For a given treatment field, the impact of a position error is modeled as a perturbation of the corresponding reference (unperturbed) TPI. The perturbation model determines the patient translation, described by a shift vector, by comparing a given in vivo TPI to the corresponding reference TPI. Patient rotations can also be determined by applying this formalism to independent regions of interest over the patient. Eight treatment plans have been delivered to an anthropomorphic phantom under a large set of couch shifts (<15 mm) and rotations (<10°) to experimentally validate this technique, which we have named Transit-Guided Radiation Therapy (TGRT). Main results. The root mean squared error (RMSE) between the determined and the true shift magnitudes was 1.0/2.4/4.9 mm for true shifts ranging between 0–5/5–10/10–15 mm, respectively. The angular accuracy of the determined shift directions was 12° ± 14°. The RMSE between the determined and the true rotations was 0.5°. The TGRT technique decoupled translations and rotations satisfactorily. In 96% of the cases, the TGRT technique decreased the existing position error. The detection threshold of the TGRT technique was around 1 mm and it was nearly independent of the tumor site, delivery technique, beam energy or patient thickness. Significance. TGRT is a promising technique that not only provides reliable determinations of the position errors without increasing the required equipment, acquisition time or patient dose, but it also adds on-line correction capabilities to existing methods currently using TPIs.
A lightweight 3D UNet model for glioma grading
Authors: Yu Xuan , Wu Yaping , Bai Yan , Han Hui , Chen Lijuan , Gao Haiyan , Wei Huanhuan , Wang Meiyun 
Published: June 2022

Abstract

Objective. Glioma is one of the most fatal cancers in the world which has been divided into low grade glioma (LGG) and high grade glioma (HGG), and its image grading has become a hot topic of contemporary research. Magnetic resonance imaging (MRI) is a vital diagnostic tool for brain tumor detection, analysis, and surgical planning. Accurate and automatic glioma grading is crucial for speeding up diagnosis and treatment planning. Aiming at the problems of (1) large number of parameters, (2) complex calculation, and (3) poor speed of the current glioma grading algorithms based on deep learning, this paper proposes a lightweight 3D UNet deep learning framework, which can improve classification accuracy in comparison with the existing methods. Approach. To improve efficiency while maintaining accuracy, existing 3D UNet has been excluded, and depthwise separable convolution has been applied to 3D convolution to reduce the number of network parameters. The weight of parameters on the basis of space and channel compression & excitation module has been strengthened to improve the model in the feature map, reduce the weight of redundant parameters, and strengthen the performance of the model. Main results. A total of 560 patients with glioma were retrospectively reviewed. All patients underwent MRI before surgery. The experiments were carried out on T1w, T2w, fluid attenuated inversion recovery, and CET1w images. Additionally, a way of marking tumor area by cube bounding box is presented which has no significant difference in model performance with the manually drawn ground truth. Evaluated on test datasets using the proposed model has shown good results (with accuracy of 89.29%). Significance. This work serves to achieve LGG/HGG grading by simple, effective, and non-invasive diagnostic approaches to provide diagnostic suggestions for clinical usage, thereby facilitating hasten treatment decisions.
Assessing liver fibrosis distribution through liver elasticity estimates obtained using a biomechanical model of respiratory motion with magnetic resonance elastography
Authors: Fujimoto Koya , Shiinoki Takehiro , Yuasa Yuki , Kawazoe Yusuke , Yamane Masatoshi , Sera Tatsuhiro , Tanaka Hidekazu 
Published: June 2022

Abstract

Objective. This study aimed to produce a three-dimensional liver elasticity map using the finite element method (FEM) and respiration-induced motion captured by T1-weighted magnetic resonance images (FEM-E-map) and to evaluate whether FEM-E-maps can be an imaging biomarker comparable to magnetic resonance elastography (MRE) for assessing the distribution and severity of liver fibrosis. Approach. We enrolled 14 patients who underwent MRI and MRE. T1-weighted MR images were acquired during shallow inspiration and expiration breath-holding, and the displacement vector field (DVF) between two images was calculated using deformable image registration. FEM-E-maps were constructed using FEM and DVF. First, three Poisson’s ratio settings (0.45, 0.49, and 0.499995) were validated and optimized to minimize the difference in liver elasticity between the FEM-E-map and MRE. Then, the whole and regional liver elasticity values estimated using FEM-E-maps were compared with those obtained from MRE using Pearson’s correlation coefficients. Spearman rank correlations and chi-square histograms were used to compare the voxel-level elasticity distribution. Main results. The optimal Poisson’s ratio was 0.49. Whole liver elasticity estimated using FEM-E-maps was strongly correlated with that measured using MRE (r = 0.96). For regional liver elasticity, the correlation was 0.84 for the right lobe and 0.82 for the left lobe. Spearman analysis revealed a moderate correlation for the voxel-level elasticity distribution between FEM-E-maps and MRE (0.61 ± 0.10). The small chi-square distances between the two histograms (0.11 ± 0.07) indicated good agreement. Significance. FEM-E-maps represent a potential imaging biomarker for visualizing the distribution of liver fibrosis using only T1-weighted images obtained with a common MR scanner, without any additional examination or special elastography equipment. However, additional studies including comparisons with biopsy findings are required to verify the reliability of this method for clinical application.
Anomalous periodicity in superpositions of localized periodic patterns
Authors: Amit Omer , Dobkowski Or , Zhou Zhifan , Margalit Yair , Japha Yonathan , Moukouri Samuel , Meir Yigal , Horovitz Baruch , Folman Ron 
Published: June 2022

Abstract
Interference between overlapping periodic patterns gives rise to important phenomena, such as Moiré fringes, appearing when the patterns have different periods or orientations. Here we present a novel phenomenon, applicable to both the classical and quantum regimes, where two one-dimensional localized periodic patterns with the same period interfere to create fringes with anomalous periodicity. We analyze the effect theoretically and demonstrate it with atomic matter waves. When a central parameter of the system is scanned continuously, we observe a discontinuous but piecewise-rigid periodicity of the resulting fringes. We show that this is a universal phenomenon that emerges from a superposition of two spatially shifted localized periodic patterns of any source or nature when they interfere with a global phase difference. The rigidity of the spectrum becomes even more robust for a coherent superposition of non-overlapping wavepackets, although the conventional interferometric visibility drops to zero. The effect is expected to appear in space and time, as well as in the momentum distribution of quantum particles.
The Lie symmetry analysis and dynamics of exact solutions for variable coefficients (2+1)-dimensional coupled burgers equation
Authors: Liu Jinzhou , Yan Xinying , Jin Meng , Xin Xiangpeng 
Published: June 2022

Abstract
In this article, the (2+1)-dimensional variable coefficients coupled Burgers equation (vcCBE) is investigated for the first time with the help of Lie symmetry analysis method. This equation is an important nonlinear physical model. The optimal system of the (2+1)-dimensional vcCBE is analyzed by Olver’s method. Then, the (2+1)-dimensional vcCBE is reduced on the basis of the optimal system to multiple sets of (1+1)-dimensional equations. Various types of soliton solutions are obtained by solving the reduced equations. The

G
′

/

G

-expansion method, tanh-coth method, and Riccati equation method are used respectively. Finally, the obtained solutions are analyzed dynamically and their kinetic behavior is investigated.
The effect of different dopants and their positions on the magnetic properties of an armchair antimonene nanoribbon: comprehensive theoretical investigation
Authors: Hasanpour Kashani Sharareh , Barvestani Jamal , Meshginqalam Bahar 
Published: June 2022

Abstract
In this work, using density functional theory, we have studied the magnetic properties of an armchair antimonone nanoribbon doped with transition metal (TM) atoms (Mn, Fe, Co, Ni, V, Cr) in various positions and different number of impurity atoms. The results show that the investigated magnetic properties, such as spin band gap, spin polarization and magnetic moment vary with type and distance from the edge of the ribbon and the number of impurities. The obtained values of magnetic moment reveal, Mn-doped nanoribbons have greater magnetization than Fe, Cr, V, Ni and Co doped ones. Also, spin polarization with significant values is observed in Mn and Fe doped structures. Our calculated spin currents demonstrate that introducing of TM dopants leads to efficient separation of spin up and down currents. Interestingly, nanoribbons with Mn, Cr and V dopants show high spin filter efficiency in a wide range of voltages. Thus, it seems that our results prepare a promising way to nanoscale spintronic devices.
Decay widths of Z

cs
(3985/4000) based on rigorous quark-hadron duality*
Authors: Wang Zhi-Gang 
Published: June 2022

Abstract
In this study, we explore the hadronic coupling constants

,

, and

of the exotic states

within the pictures of both the tetraquark and molecular states with the tentative assignments

based on rigorous quark-hadron duality. Subsequently, we obtain the total widths

and

, which are consistent with experimental values from the BESIII collaboration,

, and LHCb collaboration,

, respectively, and support assigning

and

as the hidden-charm tetraquark and molecular states with

, respectively.
Complex dynamical properties of coupled Van der Pol–Duffing oscillators with balanced loss and gain
Authors: Roy Puspendu , Ghosh Pijush K 
Published: June 2022

Abstract
We consider a Hamiltonian system of coupled Van der Pol–Duffing (VdPD) oscillators with balanced loss and gain. The system is analyzed perturbatively by using renormalization group (RG) techniques as well as multiple scale analysis (MSA). Both the methods produce identical results in the leading order of the perturbation. The RG flow equation is exactly solvable and the slow variation of amplitudes and phases in time can be computed analytically. The system is analyzed numerically and shown to admit periodic solutions in regions of parameter-space, confirming the results of the linear stability analysis and perturbation methods. The complex dynamical behavior of the system is studied in detail by using time-series, Poincaré-sections, power-spectra, auto-correlation function and bifurcation diagrams. The Lyapunov exponents are computed numerically. The numerical analysis reveals chaotic behaviour in the system beyond a critical value of the parameter that couples the two VdPD oscillators through linear coupling, thereby providing yet another example of Hamiltonian chaos in a system with balanced loss and gain. Further, we modify the nonlinear terms of the model to make it a non-Hamiltonian system of coupled VdPD oscillators with balanced loss and gain. The non-Hamiltonian system is analyzed perturbatively as well as numerically and shown to posses regular periodic as well as chaotic solutions. It is seen that the

P
T

-symmetry is not an essential requirement for the existence of regular periodic solutions in both the Hamiltonian as well as non-Hamiltonian systems.
Koopman analysis of quantum systems*
Authors: Klus Stefan , Nüske Feliks , Peitz Sebastian 
Published: June 2022

Abstract
Koopman operator theory has been successfully applied to problems from various research areas such as fluid dynamics, molecular dynamics, climate science, engineering, and biology. Applications include detecting metastable or coherent sets, coarse-graining, system identification, and control. There is an intricate connection between dynamical systems driven by stochastic differential equations and quantum mechanics. In this paper, we compare the ground-state transformation and Nelson’s stochastic mechanics and demonstrate how data-driven methods developed for the approximation of the Koopman operator can be used to analyze quantum physics problems. Moreover, we exploit the relationship between Schrödinger operators and stochastic control problems to show that modern data-driven methods for stochastic control can be used to solve the stationary or imaginary-time Schrödinger equation. Our findings open up a new avenue toward solving Schrödinger’s equation using recently developed tools from data science.
Evaluation of experimental corn hybrids on the development of morphometric parameters
Authors: Gutorova O V , Zaitsev S A , Matyushin P A , Lyovkina A Yu , Babushkin D D 
Published: June 2022

Abstract
The article presents the results of the study of new hybrid combinations of rediploid maize lines obtained by the diallelic scheme of crossing. The experiment involved simple hybrids of six homozygous lines. The degree of manifestation of heterosis according to the main morphometric parameters of the plant (stem length, ear height, panicle length, stem diameter), as well as the combinative ability of lines and components of genetic dispersion, was revealed. The ways of possible use of lines and hybrids in the breeding process are noted - for tall stature, resistance to lodging, manufacturability. The influence of overdominance in the manifestation of the length of the panicle and the diameter of the stem and the predominance of additive effects in the formation of the height of the ear were noted. Analysis of the components made it possible to identify the number of genes or groups of genes that influenced the manifestation of traits in 2021 (stem length - 1-2, cob height - 2-3, panicle length - 1-2, stem diameter - 2-3). A significant influence of cultivation conditions on the manifestation of the length of the stem, the height of the cob, the length of the panicle, and the diameter of the stem was noted.1.
The state of regional natural monuments as a result of anthropogenic impacts
Authors: Bazhenova O V , Ivanishcheva E A , Zolotova O A , Osolodkina A F , Sokolova E N 
Published: June 2022

Abstract
The article presents the results of field research of the character and intensity of anthropogenic impact on the territory of natural monuments of regional significance on the example of the Vologda region. It describes the main types of anthropogenic impacts on natural monuments. Overall, the article presents and proves with examples 8 types of anthropogenic impacts and their manifestation on the territory of 73 natural monuments of the Vologda region and its adjacent areas. Intensive recreation is the dominant type of impact. It is found that about 85% of the monuments are subject to anthropogenic impacts and are in dire need of protected areas allocation.
Fluctuation of the values of the qualitative characteristics of reservoirs in the Saratov region during the growing season
Authors: Gurkina O A , Poddubnaya I V , Rudneva O N , Rudnev M Y , Vasiliev A A 
Published: June 2022

Abstract
The article presents the results of determining the quality indicators of water from several ponds No. 3 (drain), No. 4 (non-drain), No. 8 (drain) Privolzhsky branch of the Federal State Budgetary Institution “Management “SARATOVMELIOVODKHOZ” of the Marksovsky district of the Saratov region. In the course of the studies carried out, it was revealed that during the growing season, under the influence of fish-breeding processes and the ability of reservoirs to self-purification, as a result of the vital processes of various hydrobionts, the chemical and microbiological characteristics of water changed for the better. Introduction. Our country is characterized by a wide variety of different conditions, including hydrological and climatic, which entails different types of environmental management, as well as differences in the intensity of development. Currently, there is a progressive deterioration in the quality of the aquatic environment, which is a threat to Russia’s vital national interests in the areas of environmental, food and national security. Environmental protection has recently become of world importance. Pollution of water resources, atmospheric air, soil and vegetation occurs due to urbanization and intensification of industrial and agricultural production. More than 1900 rivers flow through the territory of the Saratov region, there are 3800 reservoirs, 32 underground water deposits and about 700 lakes. Their distinctive features include a small area, often-changing outlines and volumes. The sustainability of food production is increasingly ensured by the rational and efficient use of water resources and methods of their conservation, consisting mainly in the development and organization of irrigation, including the rational development of water resources for dry farming, water supply for livestock, inland fisheries and agroforestry. Achieving food security is one of the top priorities for many states, and agriculture should not only provide food for the growing population, but also contribute to resource conservation and efficient environmental management in various areas.
Influence of subterraneous plant organs on yields and winter hardness of winter triticale (× Triticosecale Wittm.)
Authors: Voronchikhin V V , Voronchikhina I N , Rubets V S , Pylnev V V 
Published: June 2022

Abstract
Purpose of this work was to identify the influence of the underground part of the plant on winter hardness and crop yields of collection of winter hexaploid triticale with different eco-geographical origin in the terms of Nonchernozem zone in Russia. The set of 43 hybrids of triticale with different eco-geographical origin was divided into 5 groups according to its origin: Dagestan, North Caucasus, Central Black Earth zone and Ukraine, Nonchernozem zone of Russia, Belarus and Eastern Europe. For every hybrid in a group, the number of plants with lower tillering node, availability and degree of epicotyl development and secondary root system calculated and the correlation analysis of these traits with grain yields performed. The grain yields considered as an integral indicator of the genotype adaptability for specific environment conditions. As a result, the triticale genotypes with stable development of a large number of plants with lower tillering node selected Mikola, Antey, Valentin, AD4, Timbo, AD 44 and Flamingo. The influence of environment conditions where the triticale hybrid created on selection of high yields genotype and increased number of plants with lower tillering node revealed. Greatest conjugacy between crop yields and availability of double tillering nodes is typical for hybrids from Central part of country and Belarus. It turned out that hybrids from southern regions have a positive relation of crop yields and the length of epicotyl. The hybrids from Central part of Russia, Belarus and Europe do not have this correlation. A weak positive relation in triticale hybrids found between development of secondary root system and grain yield.
Simulation modeling of a two-winding three-phase voltage transformer in the MATLAB program
Authors: Belov S I , Tsedyakov A A , Galkin M M 
Published: June 2022

Abstract
The article calculates the parameters of the transformer according to the technical characteristics of domestic manufacturers of power equipment. Simulation modeling of a three-phase voltage transformer in the idle mode by the Tree-Phase Transformer (Two Windings) block and at various load factors is carried out. The constructed simulation model of the transformer is recommended to be used as a basis for the subsequent study of processes in the rural power supply system.
Determination of the load characteristics of single-screw pumps used at the enterprises of the agro-industrial complex
Authors: Akhmedova N R , Naumov V A 
Published: June 2022

Abstract
Single-screw pumps are widely used at enterprises of the agro-industrial complex, for example, in the food industry for pumping semi-viscous and viscous products, agriculture during drainage or irrigation of the territory. Hydraulic calculation of technological pipelines, which takes into account the characteristics of pumping equipment, is an important stage in the creation of food industry enterprises. In this article, the results of processing published experimental data are considered, according to which formulas for the dependence of the flow rate Q on the pressure drop ΔP for the studied single-screw pumps are obtained, and it is also revealed that this dependence is close to linear, as in plunger pumps. Experimental calculations made it possible to determine that the dependence of the flow rate Q on the rotor speed n is characterized by the volume of liquid pumped per revolution V1
and the initial rotor speed at which the movement of the liquid n0
begins. It is found that, in the general case, the values V1
and n0
depend on the pressure drop ΔP.