bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of long- and short-range chemical order on spontaneous magnetization in single-crystalline Fe0.6Al0.4 compound thin films
Authors: Toyoki Kentaro , Kitaguchi Daigo , Shiratsuchi Yu , Nakatani Ryoichi 
Published: December 2023

Abstract
We systematically investigate the long- and short-range chemical order, lattice volume, and spontaneous magnetization in single-crystalline Fe0.6Al0.4 compound thin films. The vapor-quenching method based on a molecular beam epitaxy technique is utilized to fabricate the single-crystalline Fe0.6Al0.4 compound with the different B2 long-range order parameter S. S was varied by the deposition temperature T
d, and it increases with increasing T
d. The lattice volume V decreased with increasing T
d, while the tetragonal distortion, ∼4%, due to epitaxial strain were observed. The changes in S and V were accompanied with the change in the magnetic moment per Fe, μ
Fe. μ
Fe showed the monotonic decrease as a function of S whereas μ
Fe monotonically increases with V. With considering tetragonal distortion, μ
Fe–V relationship has a good agreement with the previous reports. The μ
Fe–S relationship showed the steep decrease of μ
Fe around S∼ 0.6. In contrast to μ
Fe–V relationship, μ
Fe–S relationship does not match only from ours to previous studies but also among other reports. It implies the statistical number of the nearest-neighbor Fe–Fe bonds, i.e. S, cannot be an enough explanatory parameter. To clarify the structural origin of change in μ
Fe, the short-range order (SRO) parameter inferred from the analysis of superlattice diffractions were introduced. They showed the clear difference for the films with high and low μ
Fe. The results suggest that the transition from the long- to the SRO state plays the significant role on μ
Fe.
Improving sub-pixel accuracy in ultrasound localization microscopy using supervised and self-supervised deep learning
Authors: Zhang Zeng , Hwang Misun , Kilbaugh Todd J , Katz Joseph 
Published: December 2023

Abstract
With a spatial resolution of tens of microns, ultrasound localization microscopy (ULM) reconstructs microvascular structures and measures intravascular flows by tracking microbubbles (1–5 μm) in contrast enhanced ultrasound (CEUS) images. Since the size of CEUS bubble traces, e.g. 0.5–1 mm for ultrasound with a wavelength λ = 280 μm, is typically two orders of magnitude larger than the bubble diameter, accurately localizing microbubbles in noisy CEUS data is vital to the fidelity of the ULM results. In this paper, we introduce a residual learning based supervised super-resolution blind deconvolution network (SupBD-net), and a new loss function for a self-supervised blind deconvolution network (SelfBD-net), for detecting bubble centers at a spatial resolution finer than λ/10. Our ultimate purpose is to improve the ability to distinguish closely located microvessels and the accuracy of the velocity profile measurements in macrovessels. Using realistic synthetic data, the performance of these methods is calibrated and compared against several recently introduced deep learning and blind deconvolution techniques. For bubble detection, errors in bubble center location increase with the trace size, noise level, and bubble concentration. For all cases, SupBD-net yields the least error, keeping it below 0.1 λ. For unknown bubble trace morphology, where all the supervised learning methods fail, SelfBD-net can still maintain an error of less than 0.15 λ. SupBD-net also outperforms the other methods in separating closely located bubbles and parallel microvessels. In macrovessels, SupBD-net maintains the least errors in the vessel radius and velocity profile after introducing a procedure that corrects for terminated tracks caused by overlapping traces. Application of these methods is demonstrated by mapping the cerebral microvasculature of a neonatal pig, where neighboring microvessels separated by 0.15 λ can be readily distinguished by SupBD-net and SelfBD-net, but not by the other techniques. Hence, the newly proposed residual learning based methods improve the spatial resolution and accuracy of ULM in micro- and macro-vessels.
Overcoming the challenges of performing metasurface-based general spatial transfer functions
Authors: Jalil-Abadi Fatemeh Sedaghat , Habibiyan Hamidreza 
Published: December 2023

Abstract
The concept of performing mathematical operations with metasurfaces has been suggested by Silva et al (Science 343, 160 (2014)). However, their proposed structure in implementing any transfer function (corresponding to any mathematical operator) for various input signals faces limitations. To tackle this issue, in this study, four different scenarios are proposed on their metasurface-based structure to generalize in a way that can implement each spatial transfer function. To evaluate the performance of the presented scenarios, seven different transfer functions are simulated to encompass a wide range of mathematical operators in the spatial domain. The implementations are based on the Fourier approach. Simulation results based on the finite element method closely match the desired values. From the results of this study, it can be seen that the third and fourth scenarios provide better accuracy. For example, when the fifth transfer function is performed by the basic structure and the fourth scenario, the normalized root mean square error, decreases from the value of 0.235 to the value of 0.0348, respectively. Furthermore, a tunable structure is achievable using the third scenario to produce different operators on the same structure. The realization of these scenarios is possible by using nanostructure-based metasurfaces.
Insight into the structural, optoelectronic, elastic and thermodynamic properties of new lead free double halides perovskites Cs2XCuF6 (X = Sc, Y): a first principle study
Authors: Rahman Nasir , Husain Mudasser , Tirth Vineet , Algahtani Ali , Azzouz-Rached Ahmed , Khan Rajwali , Ullah Asad , Shah Saima Ahmad , Inayat Kalsoom , Al-Qaisi Samah , Khan Aurangzeb 
Published: December 2023

Abstract
We conducted a thorough investigation of Cs2XCuF6 (X = Sc, Y) using a first-principles approach, exploring a wide range of material properties. We began by confirming the structural and thermodynamic stability of these compounds, employing analyses such as formation energy calculations, examination of the phonon band structure, and the utilization of the Birch-Murnaghan equation of state (EOS) curve. A noteworthy finding was the tunability of the band gaps in these double perovskite materials, achieved by substituting Sc with Y, resulting in a band gap range from 2.67 to 2.62 eV. Our analysis extended to the mechanical stability of these compounds, characterized by elastic constants and revealing mechanical anisotropy and ductility. Additionally, we explored the optical properties, highlighting their broad absorption band from the infrared (IR) to visible regions, which holds significant promise for diverse optoelectronic applications. To provide a comprehensive understanding of these materials, we delved into their thermodynamic properties, encompassing thermal expansion coefficients (κ), heat capacities, entropy (S), volume, and Debye Temperature (θ
D). This investigation spanned a wide pressure range from 0 to 30 GPa and a temperature range from 0 to 1400 K, contributing to a holistic grasp of the fundamental characteristics of Cs2XCuF6 (X = Sc, Y).
Chebyshev Petrov-Galerkin procedure for the time-fractional heat equation with nonlocal conditions
Authors: Youssri Y H , Ismail M I , Atta A G 
Published: December 2023

Abstract
In this research paper, we address the time-fractional heat conduction equation in one spatial dimension, subject to nonlocal conditions in the temporal domain. To tackle this challenging problem, we propose a novel numerical approach, the ‘Rectified Chebyshev Petrov-Galerkin Procedure,’ which extends the classical Petrov-Galerkin method to efficiently handle the fractional temporal derivatives involved. Our method is characterized by several key contributions; We introduce a set of basis functions that inherently satisfy the homogeneous boundary conditions of the problem, simplifying the numerical treatment. Through careful mathematical derivations, we provide explicit expressions for the matrices involved in the Petrov-Galerkin method. These matrices are shown to be efficiently invertible, leading to a computationally tractable scheme. A comprehensive convergence analysis is presented, ensuring the reliability and accuracy of our approach. We demonstrate that our method converges to the true solution as the spatial and temporal discretization parameters are refined. The proposed Rectified Chebyshev Petrov-Galerkin Procedure is found to be robust, and capable of handling a wide range of problems with nonlocal temporal conditions. To illustrate the effectiveness of our method, we provide a series of numerical examples, including comparisons with existing techniques. These examples showcase the superiority of our approach in terms of accuracy and computational efficiency.
Analysing the Landau-Ginzburg-Higgs equation in the light of superconductivity and drift cyclotron waves: Bifurcation, chaos and solitons
Authors: Ahmad Shabir , Lou Jie , Khan Meraj Ali , Rahman Mati ur 
Published: December 2023

Abstract
The Landau-Ginzburg-Higgs (LGH) equation is a fundamental framework for examining physical systems in the fields of condensed matter physics and field theory. This study delves into the LGH equation, particularly in the context of its relevance to superconductivity and drift cyclotron waves. Researchers have extensively investigated the LGH equation to uncover a diverse array of exact solutions, employing various methodologies. This manuscript centers on the examination of its dynamic properties, encompassing the analysis of phenomena such as bifurcations, sensitivity, chaotic behavior, and the emergence of soliton solutions. To achieve this, we employ the principles of planar dynamical theory, shedding light on the intricate behaviors embedded within the LGH equation. Furthermore, we utilize the tools and techniques provided by planar dynamical theory to derive soliton solutions for the LGH equation.
On the η pseudo
PT
symmetry theory for non-Hermitian Hamiltonians: time-dependent systems
Authors: Maamache Mustapha 
Published: December 2023

Abstract
In the context of non-Hermitian quantum mechanics, many systems are known to possess a pseudo

P
T

symmetry, i.e. the non-Hermitian Hamiltonian H is related to its adjoint H
† via the relation,

H

†

=
P
T
H
P
T

. We propose a derivation of pseudo

P
T

symmetry and η -pseudo-Hermiticity simultaneously for the time dependent non-Hermitian Hamiltonians by intoducing a new symmetry operator

η

˜

(
t
)
=
P
T
η
(
t
)

that not satisfy the time-dependent quasi-Hermiticity relation but obeys the Heisenberg evolution equation. Here, we solve the SU(1, 1) time-dependent non-Hermitian Hamiltonian and we construct a time-dependent solutions by employing this new symmetry operator and discuss a concrete physical applications of our results.
Dedicated to the memory of my mother Djabou Zoulikha and to Djabi Smail
Influence of liqorice growing on the salt composition of low-fertility soils of the Syrdarya region, Uzbekistan
Authors: Botirov Sh , Kurvantaev R 
Published: December 2023

Abstract
The article describes the influence of licorice on hard-to-reclaim lands, in order to obtain valuable roots and improve soils. The creation of a salt regime of the soil on irrigated lands is achieved only through the implementation of a complex of reclamation and agrotechnical measures, and the most important is the cultivation of licorice. For a comprehensive study of the effect of licorice on soil properties, reference sections were laid in key areas up to the groundwater table, and areas with different durations of licorice cultivation were selected. The following types of work were carried out in the field: description of the soil and soil profile, moisture content of soils and soils, selection of soil samples. Under laboratory conditions, the composition of water-soluble salts was determined. When planting licorice from the first year, a decrease in salt content is observed, by the fourth year of growing licorice, the content of dense residue ranges from 0.735 to 0.890%, by the sixth year, the soil profile to the groundwater level (GWL) turned out to be slightly saline along the profile, the content of dense residue ranges from non-saline to moderately saline degree (0.270-1.200%). With an increase in the limitation period of cultivation in the soil under licorice, the content of the chlorine ion decreases. The degree of alkalinity is strongly influenced by the content of magnesium and sodium in the soil. According to the content of total alkalinity under cultures of different age of growing licorice, there are no special differences in the profile. With an increase in the prescription of licorice cultivation, the amount of toxic salts decreases.
Analysis of the amount of flavonoids contained in the surface part of the Alhagi maurorum by chromatographic method
Authors: Kholmurodov B B , Ishimov U J , Tadjiyeva M K , Akramova R R , Samadov O B 
Published: December 2023

Abstract
The article provides information about the plant Alhagi maurorum and its chemical structure, pharmacological properties, place in folk medicine, and the high-performance liquid chromatography (HPLC) method used in its analysis. When the leaves, stems, and seeds of Alhagi maurorum were analyzed by chromatography, dehydroquercetin, rutin, quercetin, lutein, and seneroside substances belonging to the class of flavonoids were determined. These flavonoids are natural antioxidants. Their beneficial properties in medicinal plants have been studied in the literature review. Alhagi maurorum above-ground parts of leaves, stems, and seeds were recommended to be used in a generalized state.
Study of the content of soluble vitamins in juices obtained from different grape varieties
Authors: Abdiev A N , Akbarov M M , Tojiboev A A , Abdullaeva G T , Sharipov S YA 
Published: December 2023

Abstract
The purpose of this work is to study the content of vitamins in berries and wine of new promising grape varieties, depending on various soil and climatic conditions of grape growth. The results of this work should help determine the degree of contribution of individual vitamins. According to the results of the study, we will have to identify the most suitable rootstocks and habitats for the studied grape varieties, not only based on economically valuable traits and organoleptic evaluation, but also on the potentially positive impact on human health, which will allow more efficient selection and recommendation of rootstocks and areas for vineyard planting. The amount of vitamins B1, B2, B6, B9, C, PP in grapes grown in the Fergana Valley of the Republic of Uzbekistan was studied. Vitamins contained in plant tissue are involved in redox metabolism. Vitamins are involved in redox metabolism. The amount of vitamins of grape juice varieties “Husayn white” and “Charos” was studied. The amount of vitamins contained in the solution was calculated by comparing the results obtained with standard chromatograms. Vitamins B2, B6, PP are more in the Charos variety, and vitamins B1 and vitamin C were not in the Husayn White and Charos varieties.
Parameters of the disc angle of a stepped plow for tillage
Authors: Mamatov F M , Chorieva D N , Rashidov N Sh , Mukimov B R , Habibullah T S 
Published: December 2023

Abstract
The development and creation of energy-saving machines and technologies for high-quality basic processing is one of main tasks today. The existing step plows for smooth, row less plowing have a number of disadvantages. With these plows, the technology of smooth plowing is carried out in conditions of a closed furrow, as a result, they do not ensure the turnover of layers the required degree and the sealing of plant residues, and also have a high energy intensity. The purpose study is to substantiate the parameters the disk angle stepped plow. Theoretical studies were carried out using the methods of classical mechanics. Analytical expressions have been obtained to determine the permissible distance of transverse discarding of soil particles by a disk angle and the range of flight of soil particles under the action disk, depending on its parameters. Theoretical studies have established that the permissible distance of transverse discarding of soil particles by a disk angle should be no more than 29 cm. The analysis of the expressions obtained showed that with an increase in the diameter disk angle-lift, its angle of installation to the pressure of movement, the angle of inclination to the vertical of depth of processing the angle-lift, the range of transverse rejection of soil particles increases. To ensure the established distance of soil discarding, the diameter of the disk angle-lift should be no more than 480 mm, its installation angle to the direction the hole should not exceed 35°, the installation angle to the vertical should not exceed 10° and the processing depth should not exceed 11 cm.
Liquid separation modeling while selecting contact devices for separation in a centrifugal field
Authors: Salin Alexey A 
Published: December 2023

Abstract
This paper proposes the use of mathematical modeling of technological processes as a tool for increasing the efficiency of equipment and solving environmental problems, which contributes to the sustainable development of enterprises in the chemical industry. The results of modeling the process of separating liquids of different densities in a centrifugal field are presented to study the influence of the type of atomizers on the flow rate and the number of contact devices on the separation efficiency. The work shows the importance of using numerical modeling in design to substantiate scientifically decisions made and confirm the effectiveness of developed structures. The results are important to intensify heat and mass transfer processes and to reduce the negative impact of production on the environment.
Justification of parameters and operating modes of an elevator with combined rods
Authors: Kodirov S T , Khatamov B A , Payziev G K 
Published: December 2023

AbstractModern potato harvesters provide the required performance indicators under favorable operating conditions. Under unfavorable conditions, the completeness of separation of tubers from impurities decreases, and losses and damage to potato tubers increase. This situation is associated with the imperfection of the separating working parts of the potato digger. As a result, the productivity of potato diggers is generally determined by the throughput of their separating working bodies. Currently, rod elevators are most widespread and used. Therefore, increasing the efficiency and quality of work of the separating working parts of a potato digger is an urgent scientific and technical task.
Rapid detection of landslides mechanisms and assessment of their geometry and dimensions by means of a drone survey (UAV) after the 2023 Turkey-Syria earthquake
Authors: Milev N. , Tobita T. , Kiyota T. , Shiga M. 
Published: December 2023

Abstract
The 2023 Turkey-Syria earthquakes (Mw=7.7 and Mw=7.6, respectively) had serious impact on human lives, infrastructure and buildings. Unfortunately, more than 15 million people have been affected and current estimation of financial loss exceeds 35 billion dollars. Furthermore, more than 550 Mw>4 aftershocks have been recorded since the catastrophic events of February 6th 2023. Such emergency situations require rapid actions for assessing the failure mechanism and scale of problematic landslides since immediate decisions should be taken in most extreme cases. Recent advances in technology allows the application of relatively simple methods for such emergency engineering estimation – a good example is the use of drones (UAV) which are easily available on market nowadays. Drone videos allow the subsequent measurement of important parameters of landslides, such as length, width, depth, failure plane inclination and volume of displaced soil. The presented paper demonstrates three case studies which are based on drone video recordings: two landslides (Islahiye and Tepehan, respectively) and a rockfall (Idili).
Depth profile of Eurocode LM1 Load and its influence on geotechnical structures
Authors: Kerenchev N , Dobrinova A 
Published: December 2023

Abstract
This study concerns the impact of the moving loads LM1 on geotechnical structures like embankments and retaining structures related to cut and fill slope problem for road construction and maintenance. In many national standards or recommendations there is a depth dependant reduction factor for live road loads. Bulgarian road infrastructure agency and other institutions do not account for the load reduction with depth, which corresponds to higher cost of the infrastructure itself. This problem appears mainly when calculating the most common 2D tasks, while LM1 and the soil are 3D in nature. This paper presents two geotechnical structures an embankment and a retaining wall, where 3D FEM model is used. Using higher level soil model as hardening soil model with small strain stiffness, the study obtains the reduction of the tandem systems of LM1 and its influence on the slope surface or the structure itself.
Innovative approach for surveying slope stability in road infrastructure rehabilitation
Authors: Mitev I , Balev V , Penev V , Shtereva K , Moskovska L , Kalchev K 
Published: December 2023

Abstract
The objectives of the repair, maintenance and rehabilitation of the road network in mountainous terrains focus on the study of the structural condition of the rock slopes. An innovative approach to structural mapping and analysis was implemented within the framework of a survey project for a road section of road II-35 Troyan-Karnare, known as “BEKLEMETO”. This section begins with a long and steep descent from the Beklemeto saddle (at 1,525.5 m above sea level), passes through numerous bends on the southern rocky slope of the mountain and after 22.7 km descends into the northwestern part of the Karlovska valley, to the village of Karnare (at 562 m above sea level). The study of the structural disturbance provides an opportunity to present the groups of joints that have developed intensively on the rock slopes passing near the Republic Road II-35 in the section between Beklemeto and Karnare. Over the years, these slopes have been subjected to weathering, erosion and collapse processes, which have led to changes in the physical and mechanical properties of the rocks forming the slopes. The technology of mobile ground laser scanning, which is a suitable method for covering the complex characteristics of the terrain, was chosen for the research. The implementation of this technology was carried out through an integrated complex. Using this method, a total of 18 representative sections within the road II-35 “BEKLEMETO” were studied, and the number of measured cracks exceeded 13,000. The total length of the researched sections is over 10,770 m. In processing, short cracks with a length of less than 0.8 m, which do not affect the structural disturbance of the rock formations, are excluded. These data and studies are essential for the planning of effective measures to maintain and rehabilitate road infrastructure in complex mountain conditions.