bluuebunny/crossref_metadata_2025 huggingface dataset:
Ancient evolutionary origins of hepatitis E virus in rodents
Authors: Jo Wendy K. , Anzolini Cassiano Murilo Henrique , de Oliveira-Filho Edmilson Ferreira , Brünink Sebastian , Yansanjav Adiya , Yihune Mesele , Koshkina Alyona I. , Lukashev Alexander N. , Lavrenchenko Leonid A. , Lebedev Vladimir S. , Olayemi Ayodeji , Bangura Umaru , Salas-Rojas Mónica , Aguilar-Setién Álvaro , Fichet-Calvet Elisabeth , Drexler Jan Felix
Published: December 2024

Hepatitis E virus (HEV; family
Hepeviridae
) infections cause >40,000 human deaths annually. Zoonotic infections predominantly originate from ungulates and occasionally from rats, highlighting the zoonotic potential of rodent-associated hepeviruses. We conducted host genomic data mining and uncovered two genetically divergent rodent-associated hepeviruses, and two bat-associated hepeviruses genetically related to known bat-associated strains. We thus analyzed 2,565 liver specimens from 108 rodent and shrew species sampled from globally understudied regions and hosts in Africa, Asia, and Latin America during 2011-2018 for hepeviruses by RT–PCR. We detected 63 positive field samples (2.5%, 95% CI 1.9-3.1) from 14 animal species, including two coinfections with genetically divergent strains and significant variation (
X
2
,
P
< 0.001) in detection rates between study sites. Strain-specific qRT–PCR assays showed virus concentrations between 9.2 × 10
2
and 3.2 × 10
9
copies/g. We recovered 24 near-complete hepeviral genomes from rodents, shrews, and bats, all showing three partially overlapping open reading frames (ORFs), some including putative late domains that may be associated with quasi-envelopment. Rodent-derived hepeviruses grouped into five clades clustering in basal sister relationship to human- (31 to 84% distance in translated ORF1-3) and rat-associated HEV. Parsimony-based analyses and cophylogenetic reconciliations revealed that rodents were predominant sources of hepeviral cross-order host shifts. Bayesian ancestral state reconstructions substantiated a direct origin of human-associated HEV in ungulates such as swine and camelids (posterior probability 0.8), whereas the nonrecent evolutionary origins of human- and ungulate-associated HEV were projected to rodent hosts (posterior probability > 0.9). Our results elucidate the genealogy of human HEV and warrant increased surveillance and experimental risk assessments for rodent-associated hepeviruses.
Musk deer are inherited
Authors: Lai Yunfan
Published: December 2024

This paper explores a rare sound correspondence pattern found in Gyalrongic languages, focusing on two etyma:
‘musk deer’ and ‘valley’. The reflexes in daughter languages exhibit different onsets, including palatals, alveolars, and
laterals, which renders their genetic relationship non-obvious. Despite its significance, this correspondence pattern has been
largely overlooked and insufficiently reconstructed. In this study, I propose a novel reconstruction of the onset, namely *t.ɬj-,
elucidating the distinct reflexes observed in different sub-branches. Through this analysis, I demonstrate that both etyma have
Sino-Tibetan origins. Additionally, the paper emphasises the importance of studying correspondences with limited examples and
discusses the broader implications of such research for other domains.
Narrative discourse segmentation in clinical linguistics
Authors: Bergelson Mira B. , Khudyakova Mariya V.
Published: December 2024

This chapter deals with segmentation, definition of basic units
and annotation of the first corpus of Russian narratives by individuals with brain damage –
people with aphasia and right hemisphere damage – and neurologically healthy speakers. We
show that parameters such as pause length and intonation contours cannot be used for
segmentation of impaired speech. Instead, they use syntactic criteria for the identification
of the basic, or – as they are called in this paper – elementary discourse
units (EDUs). The Russian CliPS (Clinical Pear Stories) corpus contains
multi-layer annotation of audio- and video-recordings, performed on micro- and
macro-linguistic level, and can be used as a source for qualitative and quantitative
research on various aspects of speech in aphasia and right hemisphere damage.
A function of TPL/TBL1-type corepressors is to nucleate the assembly of the preinitiation complex
Authors: Leydon Alexander R. , Downing Benjamin , Solano Sanchez Janet , Loll-Krippleber Raphael , Belliveau Nathan M. , Rodriguez-Mias Ricard A. , Bauer Andrew J. , Watson Isabella J. , Bae Lena , Villén Judit , Brown Grant W. , Nemhauser Jennifer L.
Published: December 2024

The plant corepressor TPL is recruited to diverse chromatin contexts, yet its mechanism of repression remains unclear. Previously, we leveraged the fact that TPL retains its function in a synthetic transcriptional circuit in the yeast model Saccharomyces cerevisiae to localize repressive function to two distinct domains. Here, we employed two unbiased whole-genome approaches to map the physical and genetic interactions of TPL at a repressed locus. We identified SPT4, SPT5, and SPT6 as necessary for repression with SPT4 acting as a bridge connecting TPL to SPT5 and SPT6. We discovered the association of multiple additional constituents of the transcriptional preinitiation complex at TPL-repressed promoters, specifically those involved early in transcription initiation. These findings were validated in yeast and plants, including a novel method to analyze the conditional loss of function of essential genes in plants. Our findings support a model where TPL nucleates preassembly of the transcription activation machinery to facilitate the rapid onset of transcription once repression is relieved.
A STAG2-PAXIP1/PAGR1 axis suppresses lung tumorigenesis
Authors: Ashkin Emily L. , Tang Yuning J. , Xu Haiqing , Hung King L. , Belk Julia A. , Cai Hongchen , Lopez Steven S. , Dolcen Deniz Nesli , Hebert Jess D. , Li Rui , Ruiz Paloma A. , Keal Tula , Andrejka Laura , Chang Howard Y. , Petrov Dmitri A. , Dixon Jesse R. , Xu Zhichao , Winslow Monte M.
Published: December 2024

The cohesin complex is a critical regulator of gene expression. STAG2 is the most frequently mutated cohesin subunit across several cancer types and is a key tumor suppressor in lung cancer. Here, we coupled somatic CRISPR-Cas9 genome editing and tumor barcoding with an autochthonous oncogenic KRAS-driven lung cancer model and showed that STAG2 is uniquely tumor-suppressive among all core and auxiliary cohesin components. The heterodimeric complex components PAXIP1 and PAGR1 have highly correlated effects with STAG2 in human lung cancer cell lines, are tumor suppressors in vivo, and are epistatic to STAG2 in oncogenic KRAS-driven lung tumorigenesis in vivo. STAG2 inactivation elicits changes in gene expression, chromatin accessibility, and 3D genome conformation that impact the cancer cell state. Gene expression and chromatin accessibility similarities between STAG2- and PAXIP1-deficient neoplastic cells further relate STAG2-cohesin to PAXIP1/PAGR1. These findings reveal a STAG2-PAXIP1/PAGR1 tumor-suppressive axis and uncover novel PAXIP1-dependent and PAXIP1-independent STAG2-cohesin–mediated mechanisms of lung tumor suppression.
Experimental design for testing local Lorentz invariance violation in gravity
Authors: Li Jia-Rui , Tan Yu-Jie , Jin Tao , Huang Wei-Sheng , Huang Hao , Qin Cheng-Gang , Shao Cheng-Gang
Published: December 2024

Local Lorentz invariance is an important foundation of General Relativity, and its high-precision testing can help to explore the unified theories. In this work, we focus on the local Lorentz violating effect in pure gravity with mass dimension d = 6, and study the experimental design for testing local Lorentz violation with precision torsion pendulum experiments. By designing the striped test and source masses, and setting the appropriate azimuth angles of the experimental setup, we found the constraint accuracy of the local Lorentz violation coefficients is expected to be improved by one to two orders of magnitude compared with the international optimal level. Moreover, considering the difficulty level of changing the azimuth angle of the experimental setup in practical experiments, we proposed two experimental strategies and separately studied the azimuth-angle configurations corresponding to the optimal constraint of the local Lorentz violating coefficients, which can guide the development of the later experiments.
Study on the improvement of the insulation performance of polypropylene film by regulating TiO2–F by liquid phase grafting
Authors: Li Min , Liu Qi , Tian Haonan , Ma Jianqiao , Xie Jun
Published: December 2024

According to the problem that the performance of film capacitors is limited due to the poor insulation of polypropylene (PP) film, a new nano-filler was studied and a PP composite dielectric was fabricated. The breakdown strength of composite dielectrics was measured and the mechanism for improving their insulation properties was analyzed. In this paper, TiO2 with high dielectric constant is plasma-treated and then coated with a layer of PP shell. TiO2 increases the dielectric constant of PP film composite dielectrics, and shell-like PP makes TiO2 more tightly bound to the PP matrix. Compared with pure PP, the breakdown voltage of TiO2–F is increased by 18.7%, and the breakdown voltage of TiO2–F@PP-mah is increased by 40.5%, and the new nano filler greatly improves the insulation performance of PP. The experimental results show that TiO2 introduces a low-density trap, TiO2–F introduces a high-density deep trap, and the modification of PP-mah slows down the dielectric constant conflict, increases the compatibility between the nanoparticles and the matrix, and increases the trap energy level. Based on the analysis of experimental results with different mass fractions, this paper proposes the optimal filling ratio of the new core-shell, which provides a new method for the composite dielectric to improve the insulation performance.
Polarizability, plasmons and damping in pseudospin-1 gapped materials with a flat band
Authors: Zhemchuzhna Liubov , Iurov Andrii , Gumbs Godfrey , Huang Danhong
Published: December 2024

The subject of our present investigation is the collective electronic properties of various types of pseudospin-1 Dirac-cone materials with a flat band and finite bandgaps in their low-energy spectra. Specifically, we have calculated the dynamical polarization, plasmon dispersions, as well as their decay rates due to Landau damping and presented the closed-form analytical expressions for the wave function overlaps for both the gapped dice lattice and the Lieb lattice. The gapped dice lattice is a special case of the more general α-

T

3

model such that its band structure is symmetric and the flat band remains dispersionless. On the other hand, the Lieb lattice has a flat band which appears at the lowest point of its conduction band. Our results for these two materials exhibit unique features in the plasmon spectra and their damping regions, which have never been previously reported. For example, the particle-hole modes of a Lieb lattice appear as finite-size regions, while the plasmon modes exist only in areas with small wave numbers but an extended range of frequencies.
A high-precision DOA estimator for low-frequency signals using ultra-dense small-aperture microphone arrays
Authors: Zhang Kunkun , Tong Haonan , Tao Jun , Li Baoqing , Zhou Qianwei
Published: December 2024

Accurate direction of arrival (DOA) estimation is critical for the effectiveness of unattended ground sensor (UGS) systems, as it enhances sound localization, situational awareness, resource optimization, and facilitates integration with other sensor data for comprehensive monitoring. With the growing demand for lightweight and miniaturized sensors suitable for diverse environments, challenges arise in DOA estimation of low-frequency signals using dense small-aperture microphone arrays, especially under noisy conditions. Despite advancements in deep learning, both conventional and existing neural network methods struggle with this task. In this paper, we present the multi-resblock DOA network (MRDNet), a novel neural network designed for precise DOA estimation of low-frequency sounds in noisy environments using small-aperture arrays. MRDNet was evaluated under simulations involving Brownian and Gaussian noise, representing wind and general background disturbances. The results demonstrate that MRDNet achieves superior accuracy, with a mean angular error of 2.797 degrees, significantly outperforming baseline methods by 24.93%. Furthermore, we show that increasing the number of microphones within a constant array size using MRDNet effectively enhances DOA accuracy in the context of deep learning. The source code is available at https://github.com/KunKun-Zhang/MRDNet.
Optimization of auxetic tubular structures with dragonfly-wing-shape cells through advanced multiobjective optimization techniques
Authors: Augusto Gomes Rafael , de Oliveira Lucas Antonio , Francisco Matheus Brendon , Gomes Guilherme Ferreira
Published: December 2024

Interest in auxetic structures has surged due to their unique mechanical behavior, including a negative Poisson’s ratio and exceptional energy absorption (EA) capabilities. This study aims to enhance the mechanical properties of tubular structures using a dragonfly-shaped auxetic unit cell. An optimization framework is implemented to simultaneously minimize three critical structural objectives: Poisson’s ratio, mass, and stress. Numerical simulations facilitate metamodeling via the response surface method, creating surrogate models that accurately represent each response variable. A metaheuristic optimization technique, the Non-dominated Sorting Genetic Algorithm, is then employed to optimize these responses for compression performance. Experimental validation supports the numerical findings, with two optimized designs proposed. The first design (TOPSIS 1) shows reductions in Poisson’s ratio by up to 3% and stress by 45%, while the second design (TOPSIS 2) demonstrates a stress reduction of 498%. Additionally, experimental validation reveals significant improvements in EA capabilities, with TOPSIS 1 and TOPSIS 2 increasing EA by 58% and 545%, respectively, compared to the baseline. The integration of Industry 4.0 concepts, such as additive manufacturing and numerical simulation, proves essential in achieving efficient and effective outcomes, highlighting the importance of advanced manufacturing techniques in enhancing structural design paradigms.
Effect of group-velocity dispersion on the generation of multimode pulsed squeezed light in a synchronously pumped optical parametric oscillator
Authors: Averchenko V A , Malyshev D M , Tikhonov K S
Published: December 2024

Parametric down-conversion in a nonlinear crystal is a widely employed technique for generating quadrature squeezed light with multiple modes, which finds applications in quantum metrology, quantum information and communication. Here we study the generation of temporally multimode femtosecond pulsed squeezed light in a synchronously pumped optical parametric oscillator (SPOPO) operating below the oscillation threshold, while considering the presence of non-compensated intracavity group-velocity dispersion. Based on the developed time-domain model of the system, we show that the dispersion results in mode-dependent detuning of the broadband supermodes of the pulsed parametric process from the cavity resonance due to temporal Gouy phase, as well as linear coupling between these supermodes. With perturbation theory up to the second order in the coupling coefficients between modes, we obtained a solution for the amplitudes of multiple supermodes given an arbitrary sub-threshold pump level. The dispersion affects the quantum state of the supermodes by influencing their squeezing level and the rotation of the squeezing ellipse. It also affects the entanglement among the supermodes, leading to reduced suppression of shot noise level as measured in the balanced homodyne detection scheme. Furthermore, our study highlights the potential of SPOPO with group-velocity dispersion as a testbench for experimental investigations of multimode effects in linearly evanescent coupled parametric oscillators.
High FOM fano resonance refractive-index sensor based on a baffled MIM waveguide coupled with an inverted L-Shaped resonator
Authors: Chen Tianshan , Gao Jiayao , Wang Xiangxian , Chen Yizhen , Yang Hua , Qi Yunping
Published: December 2024

A baffled metal-insulator-metal (MIM) waveguide coupled with an L-shaped resonator was developed and a double Fano resonance was excited in the structure. Using the optimal parameters, the sensing characteristics of the structure in a gas environment were studied. The maximum sensitivity was 682 nm/RIU and the maximum figure of merit (FOM) was 7587. Based on this structure, the influence of the resonators on the transmittance characteristics was studied for four different placement ways. A triple Fano resonance was obtained by simply inverting the L-shaped resonator. In this state, the maximum sensitivity and FOM reached 945 nm/RIU and 1.04 × 105, respectively. Compared with the L-shaped resonator structure, the sensitivity and FOM of the inverted L-shaped resonator structure were significantly improved. This study provides a new concept for designing a refractive-index sensor with miniaturization, integration, high sensitivity, high FOM, and multichannel sensing.
A comprehensive investigation of optoelectronic and thermoelectric attributes of VCu3X4 (X = S,Se,Te) compounds for renewable energy applications
Authors: Tauqeer Muhammad , Mubashir Muhammad , Ali Mubashar , Bibi Zunaira , Gul Imran , Bilal Muhammad , Mughal Jahanzaib , Khan Dilbar , Ullah Muhammad Mitee , Arshad Kinza , Bentalib Abdulaziz
Published: December 2024

Research on sustainable, environmentally friendly power sources aims to address potential energy issues caused by the decreasing availability of renewable resources. The V-series compounds are considered the most promising materials for the next generation because they are ecologically friendly. In the present work, we used First-Principle computation to investigate the structural, mechanical, optical, electronic, thermodynamic, and thermoelectric attributes of

VCu
₃
X
₄
(
X
=
S
,
Se
,
Te
)

compounds using Density Functional Theory (DFT). First, we applied the PBE-GGA method to calculate the lattice constants, which were found to be

5.437

Å

,

5.669

Å

, and

5.954

Å

for

VCu
₃
S
₄

,

VCu
₃
Se
₄

, and

VCu
₃
Te
₄

, respectively. We thoroughly examined the binding energy to assess the structural stability of

VCu
₃
X
₄

compounds, revealing the thermodynamical stability of the uunder-study compounds. Furthermore, mechanical stability was confirmed using elastic stiffness constants, satisfying the Born-Stability criteria

(

C

44

<
0
)

. Pugh’s and Poisson’s ratios, along with the Cauchy pressure, indicated ductile behavior in all compounds except

VCu
₃
S
₄

, which exhibited brittle characteristics. The compounds demonstrate significant optical conductivity and absorption coefficients, with

VCu
₃
Te
₄

being particularly responsive to intense photon streams due to its smaller band gap of

0.57
eV

, while

VCu
₃
S
₄

and

VCu
₃
Se
₄

have band gaps of 1.01 eV and 0.88 eV, respectively. We assessed the electronic properties by examining the band structure and the total and partial density of states

(
TDOS
/
PDOS
)

, which illustrated that the under studied compounds have indirect band gaps of 1.01 eV

(
VCu
₃
S
₄
)

, 0.88 eV

(
VCu
₃
Se
₄
)

, and 0.57 eV

(
VCu
₃
Te
₄
)

. Using BoltzTraP coding, we evaluated the Seebeck coefficient, electrical and thermal conductivity, and power factor, demonstrating that

VCu
₃
Te
₄

, with its small energy gap, is particularly promising for high-temperature thermoelectric and optoelectronic applications.
Lie symmetries for the shallow water magnetohydrodynamics equations in a rotating reference frame
Authors: Paliathanasis Andronikos , Halder Amlan
Published: December 2024

We perform a detailed Lie symmetry analysis for the hyperbolic system of partial differential equations that describe the one-dimensional Shallow Water magnetohydrodynamics equations within a rotating reference frame. We consider a relaxing condition

∇

h
B

≠
0

for the one-dimensional problem, which has been used to overcome unphysical behaviors. The hyperbolic system of partial differential equations depends on two parameters: the constant gravitational potential g and the Coriolis term f
0, related to the constant rotation of the reference frame. For four different cases, namely g = 0, f
0 = 0; g ≠ 0 , f
0 = 0; g = 0, f
0 ≠ 0; and g ≠ 0, f
0 ≠ 0 the admitted Lie symmetries for the hyperbolic system form different Lie algebras. Specifically the admitted Lie algebras are the

L

10

=

A

3
,
3

⋊

A

2
,
1

⨂

s

A

5
,
34

a

; L
8 = A
2,1 ⋊ A
6,22;

L

7

=

A

3
,
5

⋊

A

2
,
1

⋊

A

2
,
1

; and L
6 = A
3,5 ⋊ A
3,3respectively, where we use the Morozov-Mubarakzyanov-Patera classification scheme. For the general case where f
0
g ≠ 0, we derive all the invariants for the Adjoint action of the Lie algebra L
6 and its subalgebras, and we calculate all the elements of the one-dimensional optimal system. These elements are then considered to define similarity transformations and construct analytic solutions for the hyperbolic system.
Dissociative excitation of acetone induced by electron impact
Authors: Stachová B , Garcia Angulo E L , Matejčík Š , Michalczuk B , Országh J
Published: December 2024

We report the results of an experimental study focused on the low-energy (10–100 eV) electron impact excitation of acetone. In the emission spectrum, the most prominent excited species were found to be the hydrogen Balmer series, the excited CH radical in the A and B electronic states, and atomic carbon. The presence of OH emission in the spectra confirms the tautomerization process induced by electron impact. The acetone emission spectra were measured at several different reaction energies, forming a unique 3D spectral electron energy map. Excitation-emission functions were extracted for selected most prominent products and corresponding threshold energies were determined.
Research Status and Progress on Technologies for Exploration of Dry Hot Rock Resources in China
Authors: Chen Zhen , Wang Xingzi , Peng Binbin , Zhang Hai , Li Zixiang , Gong Haiting
Published: December 2024

Hot Dry Rock (HDR) represents a clean and renewable geothermal energy source, playing a crucial role in global energy transition and climate change mitigation. China possesses abundant HDR resources. However, compared to the international advanced level, domestic exploration technology is still in its early stages. This paper analyzes the distribution of HDR resources in China and the achievements in exploration projects. It delves into the principles, applications, limitations, and development trends of key technologies in the main processes of HDR resource exploration. The paper emphasizes the necessity of improving exploration precision, enhancing high-temperature drilling fluid development, advancing logging technology, and establishing unified evaluation standards. Furthermore, it highlights the potential of artificial intelligence and big data technologies in improving exploration efficiency and reducing development risks, aiming to provide scientific technical guidance and practical references for the exploration and utilization of HDR resources in China.
Analysis on Towing Damage and Protection suggestions of Submarine Pipelines Caused by Ship Anchoring Operation
Authors: Sun Qian , Liu Jianmin , Zhou Hong
Published: December 2024

In this article towing damage of the anchor to the submarine pipeline is mainly studied, the magnitude of the towing force by using ABAQUS software is calculated, and the strength of the submarine pipeline is checked on the basis of the drag force. It is found that the damage to the pipeline caused by the drag is destructive, and the pipeline may fail, which may cause danger. This paper summarizes the calculation method of towing anchor navigation distance, and puts forward the pipeline protection method of setting no anchor area. From the point of view that the energy of the anchor can be absorbed by the soil, it is proposed that the pipeline can be buried to a certain depth to prevent the towing damage of the anchor to the submarine pipeline. The reference data are presented through a specific example. The research results can provide a theoretical basis and reference for the future research on the damage of submarine pipelines caused by towing and the protection methods of pipelines.
Research on Fast Prediction Methods of Ice Shape in Ice-tolerant Airfoil Design
Authors: Zheng Hongdi , Liu Fan , Cui Xingda , Li Weibin , Ma Shuai , Xiao Zhongyun , Zhao Dazhi
Published: December 2024

Ice accretion damages the aerodynamic performance of aircraft during flight, so the airfoil design based on the concept of ice-tolerant has become a brand-new research direction. In order to shorten the Computational Fluid Dynamics (CFD) time of ice shape in the design of ice-tolerant airfoil, this paper studies a fast prediction method of ice shape based on the Class function/Shape function Transformation (CST) method and Kriging model. Firstly, airfoils are parameterized by the CST method to establish the airfoil database. Secondly, the ice shape database is obtained by CFD calculations, and then the ice shapes mapping on airfoils are generated by the Kriging model. Finally, the sample number, CST order, POD energy ratio and other relative parameters are studied based on the NACA0012 airfoil. Results show that the CFD time can be extensively saved in ice-tolerant design for airfoils, and further, for three-dimensional optimization problems with variable icing conditions.
Direct shooting method-based optimized design of novel bridge-like pavement structures
Authors: Zhai Xiaoliang , Wang Hanzhe , Hou Xu , He Lei
Published: December 2024

To mitigate the impact of subgrade settlement on pavement in permafrost regions, an innovative prefabricated pavement structure system composed of longitudinal and transverse beams combined with concrete slabs was proposed and designed. The mechanical performance indicators under the most unfavorable conditions were evaluated using ANSYS finite element software. The direct shooting method was employed to systematically optimize the dimensions of the prefabricated pavement structure components. The results indicate that the prefabricated pavement structure exhibits excellent deformation resistance during subgrade settlement. The direct shooting method optimized the prefabricated pavement structure, ensuring structural safety while reducing weight and minimizing construction costs. Furthermore, a correlation analysis was conducted on the dimensions of the structural components affecting maximum deformation, maximum equivalent stress, and overall structural volume. The analysis identified the significant influence of the upper flange plate of the steel beam and the bottom steel plate on the overall mechanical performance and steel consumption of the pavement structure.
Study on Resistance Characteristics of Honeycomb Ceramic thermal Storage Material with Different Pore Shapes and VOCs Thermal Oxidation Performance
Authors: Li Xiuquan , He Ziqiang , Huang Song , Li Zongshan , Zhang Longyi , Fan Dingding , Chen Qiaoqiao
Published: December 2024

Based on the square hole and triangular hole type honeycomb ceramic thermal storage material, this paper experimentally studies the influence of hole type, length, gas flow rate and Reynolds number on the resistance loss characteristics, and further explores the conversion characteristics of VOCs in different bed temperatures. The results show that the square hole type honeycomb ceramic has a larger equivalent diameter and less resistance loss than the triangular hole type honeycomb ceramic under the same porosity. At the same flow rate, the gas has sufficient heat transfer in the triangular hole honeycomb ceramic disturbance, and the VOCs oxidation conversion efficiency is high. When the honeycomb ceramic length is greater than 50 cm and the Reynolds number is greater than 550, the pressure loss shows a good linear increase trend with the change of the material length. When the honeycomb ceramic thermal storage material length exceeds 70 cm, the inlet effect can be ignored. When the bed temperature of the two honeycomb ceramic thermal storage material with different pore types reaches above 750 °C, the outlet VOCs concentration is below 15 mg/m3, and the conversion rate reaches above 97%.
Intelligent Monitoring System for Roller-Compacted Earth-Rock Dam Construction Process
Authors: Liu Biao , Gao Fei , Tian Baoming , Gong Xiaohui , Zhu Haotian , Zhao Yufei
Published: December 2024

The conventional quality control method of earth-rock dam is insufficient to meet the requirements of intelligent and fine management of dam filling construction in the new stage. With the expansion of construction scale and the overall improvement in information technology level, the traditional compaction quality control methods no longer meet the demands of modern mechanized rapid construction or provide real-time compaction information for engineering contractors. In response to the current conventional design and construction schemes for earth-rock dams, an intelligent real-time monitoring system established in this paper for compaction construction of earth-rock dams. This system utilizes advanced Beidou high-precision positioning and navigation technology, vibration-sensing IoT technology, real-time processing of massive construction information, and BIM technology. It achieves real-time intelligent monitoring of key compaction processes in dam construction and refined management of unit engineering. The intelligent system established provides crucial technical support for the safe and reliable operation of water conservancy and hydropower projects. Simultaneously, it enables real-time, remote, and intelligent monitoring of dam construction processes, significantly enhancing the technological content and informatization level of water conservancy engineering construction.
Truncated partial-wave analysis in pion-electroproduction
Authors: Omerović Elena , Omerović Rifat , Osmanović Hedim
Published: December 2024

Numerical and pseudo data for pion electroproduction from four reaction channels, p(γ*, π
0)p, p(γ*, π
+)n, n(γ*, π−
)p, and n(γ*, π
0)n, from threshold up to W = 1.575 GeV are used to perform a single energy partial wave analysis. As a constraint, higher partial waves are taken from the MAID07 model and lower partial waves are fitted. It is demonstrated that truncated partial wave analysis in a full isospin can be obtained with this procedure. The results for photon virtuality Q
2 = 0.5 GeV2 are presented. Electromagnetic Eℓ±
, Mℓ±
, and longitudinal Lℓ±
multipoles are presented and discussed. In the first step, numerical data are generated, and the optimal number of lower partial waves required for a good data fit is determined. In the second step, the same procedure is applied using generated pseudo data.
Radiofrequency Coil Tuning Using Matching Circuit Co-Simulation with Magnetic Resonance Integral Equations
Authors: Ajanovic Amer , Ogier Stephen , Tomi-Tricot Raphael , Hajnal Joseph V , Malik Shaihan J
Published: December 2024

The proposed extension to the conventional circuit co-simulation (CCS) method reliably and efficiently introduces arbitrary matching networks into CCS routines and is here dubbed as matching circuit co-simulation (MCCS). It further achieves coil tuning for resonance and an optimum scattering parameters condition that resembles a fully matched coil. Combined with magnetic resonance integral equations (MARIE), the proposed MCCS further accurately produces a full EM simulation of the coils. We first validated MARIE with the MCCS routine to use it to model simple single-channel coils and parallel transmit (pTx) head arrays coupled with Duke, a digital human body model. Having successfully validated the MCCS routine, we swept through both tuning and matching network parameters to optimize the coil. While optimizing for all parameters simultaneously is a viably efficient option for coil models of low complexity, these models are not realistic, and we found that it becomes a highly computationally expensive problem to solve for more complex coil geometries, such as birdcage coils and pTx coils with higher number of channels, especially when shielding is included. Consequently, we separated tuning and matching into two steps, by first tuning the coil to the right frequency, and then introducing matching networks to enhance the power transmission into the body. We observed lower on-diagonal S-parameters after matching in all pTx coils, but 1 coil still had strong cross-coupling. Finally, electromagnetic fields obtained via MARIE for separate port excitation were successfully combined using MCCS.
Naked BPS singularities in AdS3 supergravity
Authors: Giribet Gaston , Mišković Olivera , Yazbek Nahuel , Zanelli Jorge
Published: December 2024

anti-de Sitter (AdS) supergravity admits supersymmetric solutions that describe BPS defects. We investigate such solutions in AdS3 supergravity formulated as a Chern–Simons theory on

OSp

(
2

|

1
)

×

OSp

(
2

|

1
)

and compute the Killing spinor equation on the BTZ geometry, looking for BPS solutions on the entire space of parameters. We focus our attention on defects that represent geometries with integer angular excesses corresponding to specific negative values of the BTZ mass, extending other results in the literature to all real values of mass and angular momentum. We argue that, in the semiclassical limit, the BPS defects can be associated with degenerate representations of the Virasoro symmetry at the boundary. The case of non-diagonal representations, describing stationary, non-static defects, is also discussed.
Overview of the III International Conference on Environmental Technologies and Engineering for Sustainable Development –ETESD-III 2024
Authors: Choriev R K , Astanakulov K D , Mamatov F M , Karshiev F U , Yan F , Mao X , Fozilov G G , Borotov A N , Khudoev I
Published: December 2024

This overview presents the key themes and outcomes of the III International Conference “ETESD - 2024,” held in Tashkent from October 17 to 19, 2024. It details the participants and proceedings, highlighting significant trends in environmental protection, biodiversity preservation, and the innovative technologies applied in agriculture. The conference addressed urgent challenges related to preventing environmental damage and discussed future prospects for advanced technologies in food production, soil protection, tillage, water conservation, and environmental research. Additionally, the event fostered dialogue on the integration of earth space systems into these critical areas, aiming to promote sustainable practices and collaborative solutions for pressing environmental issues.

List of Programme Committee and Organizing Committee are available in this Pdf.
Treatment of liquid fertilizer solutions by electrohydraulic effect and assessment of increasing the efficiency of plant nutrition
Authors: Turdiboyev Abduvali , Akbarov Dilmurod , Norboev Anvar , Safarov Kholiyor Sayyid , Mamutov Muxammedgaliy
Published: December 2024

The article discusses the issue of increasing the efficiency of plant nutrition by treating liquid organic and mineral fertilizers with an electro-hydraulic effect. The amount of nitrates in water is reduced to 1.1 mg/l due to electro-hydraulic treatment. This creates the possibility of feeding plants and at the same time eliminating E. coli bacteria in liquid fertilizers from 2.23 mg/l. up to 102.7%, i.e. 82.55% compared to the control in exchange for its neutralization, which can prevent it from passing through the plant into the human and animal body, resulting in human health being maintained. As a result of the research, a process for electrohydraulic processing of liquid fertilizers was established, where the following processing modes and parameters were established to ensure the degree of grinding of solid particles in the liquid, processing voltage: U = 24 kV, capacitor capacity: C = 0.8 μF., number of pulses: n=175 pulses, which turned out to be sufficient. Due to electro-hydraulic processing the rate of fertilizer uptake by plants has been improved over existing technology by optimizing the breakdown of coarse fertilizers into liquid solution through electro-hydraulic treatment of liquid fertilizer solutions. As a result, it was possible to increase the yield to 33 g for tomatoes and 37 g for cucumbers per 1 hectare owned by the farm using the method of electro-hydraulic treatment of liquid fertilizers.
Archetype of self-learning classification of production impacts on the environment for sustainable development
Authors: Tsyganov Vladimir
Published: December 2024

The article is devoted to system engineering and development of eco-management technologies for sustainable development. At the top level of this corporation is the boss, making decisions regarding the sustainable development of the corporation, taking into account its impact on the environment. At the lower level is the production unit, the manager of which can use environmentally friendly technologies. The situation is studied when the boss does not know the capabilities of these technologies to reduce pollution from the production unit due to stochastic interference. In order to minimize environmental risks of production, the boss assigns the manager to one of two classes, depending on the pollution of that unit by the environment. For this purpose, procedures for forming a standard of environmental pollution, as well as assigning classes are used. Knowing these procedures and taking advantage of the ignorance of the boss, the manager can get a higher class by manipulating pollution. The game of the boss with the manager choosing pollution in such a way as to increase own objective function is studied. An archetype of self-learning classification of environmental impacts is formed, including optimal procedures for standardization and classification. It has been shown that the use of this archetype is sufficient to motivate the manager to minimize environmental pollution of the production unit even under stochastic interference.
Study of monitoring of water bodies using remote sensing data and GIS technologies (Talimarjan water reservoir)
Authors: Mukhtorov U , Kakhorov B , Khafizova Z , Murodova D , Egamberdiev R
Published: December 2024

The study of water bodies using remote sensing data and Geographic Information System (GIS) technologies is crucial for effective water resource management. This research focuses on monitoring the Talimarjan water reservoir, a vital water source in Uzbekistan, by leveraging satellite imagery and GIS tools. Remote sensing offers a cost-effective and comprehensive approach to assess various parameters, including surface area, water quality, and seasonal fluctuations in water levels. By utilizing multi-temporal satellite data, changes in the reservoir’s volume and surrounding vegetation were analyzed. The integration of GIS technologies facilitated the mapping and spatial analysis of these changes, enabling the identification of trends and potential risks, such as sedimentation and water loss. The combination of remote sensing and GIS provides valuable insights into the health and sustainability of the water reservoir, aiding in decision-making for water management authorities. This study demonstrates the effectiveness of these technologies in environmental monitoring, highlighting their potential for broader applications in the management of water resources in arid regions. Through accurate, real-time data, remote sensing and GIS help in ensuring sustainable water use, promoting efficient resource management, and mitigating the impacts of climate change on water bodies.
Application of GIS for collecting data on predicting the consequences of natural disasters in forests
Authors: Evkovich Irina , Taraban Maria , Karnaukhov Andrey , Voinash Sergey , Zagidullin Ramil , Yakushev Adel , Meshkov Sergey
Published: December 2024

The article discusses the issue of predicting the consequences of natural disasters in forests using geographic information systems (GIS) and related tools. The authors emphasize the importance of improving the quality of management and monitoring of forest resources, as well as the need to improve the perception of geoinformation in a form accessible to the user. Analysis of information systems shows that they can be used to monitor forest plantations, promptly assess the consequences of natural disasters and subsequently make informed decisions on their elimination. The authors also propose an algorithm for solving the problem of assessing and predicting the consequences of natural disasters in forests, describe the necessary conditions and initial data on the characteristics of the objects under study and the parameters being determined. In addition, using data from information systems that can be used to predict natural disasters in forest areas, recommendations are offered and the feasibility of using GIS is established, justifying the corresponding equipment and its characteristics. Overall, the article explores different approaches to forecasting and recommends using an integrated approach using modern information technologies in the field of analytics and machine learning to achieve the best results.
Effective method for fertilizing winter wheat
Authors: Ziyadullaev Z F , Abduazimov A M , Vafoyeva M B , Uzakov G O , Fazyullaev A Z
Published: December 2024

This article presents data on the effect of foliar feeding on the growth, development and overall productivity of winter wheat. To more accurately determine the effect of foliar feeding during the studies, winter wheat was grown under three agro-backgrounds (control, N90P45K30 and N180P90K60 kg/ha). During the growing season, the plants were sprayed with a suspension. During the studies, a positive effect of foliar feeding on the overall growth, development and productivity of winter wheat, as well as the effectiveness of this method, was determined.
Development of a combined drying plant for agricultural products
Authors: Rakhmatov O , Baizakov S K , Rakhmatov O F , Rakhmatov O O
Published: December 2024

The paper presents the development materials for a combined drying unit for agricultural products with IR radiation, operating in a closed-loop mode. Due to the constant uniform movement along a closed loop, the entire mass of the product being dried is uniformly coated with a flow of drying agent and is subjected to intensive heat treatment. The superimposed effect of IR radiation in combination with convective heat exchange intensifies the process of heat and mass exchange and reduces the drying time.
Installation of a spindle surface cleaner of cotton-picking machines to prevent greening
Authors: Shoumarova M , Abdillayev T , Yusupov Sh A
Published: December 2024

The primary drawback of vertical-spindle cotton-picking machines is considered to be the lower completeness of crop collection in the hopper, which primarily occurs due to the rapid greening of spindle surfaces. On these machines, brush strippers are installed to clean the spindles from greening, which simultaneously remove the cotton windings from the spindles. Attempts by designers to install special devices on machines for cleaning the spindle surfaces from greening have not yielded positive results. Consequently, a significant portion of operational time is spent on washing the spindles. The authors have developed a design for brush spindle cleaners, the installation of which does not require modifications to the existing design of the harvesting apparatus. Calculations indicate that the installation of the proposed cleaner will enable effective cleaning of the spindle surface, thereby enhancing the completeness of collection by the vertical spindle.
Justification of the basic parameters of the rotary soil subsoiler
Authors: Alijanov D , Abdurokhmonov Sh , Umirov N , Ismaylov Kh , Ogalikov J
Published: December 2024

The article presents materials for substantiating the main parameters of a rotary soil cultivator of a new sowing device equipped with a device for loosening the soil of non-performed primary tillage. To justify the width and diameter of the rotary ripper, consisting of 5 packages of pointed paws, tests were carried out to determine the location of corn stalks along the axis of the row. The test results were processed using mathematical statistics methods. Using the obtained formulas, distribution density curves of random variables were constructed. The width was taken from the plotted graph and based on this the diameters of the rotary shredder packages were taken.
Development and research of methods for strengthening the blades of a straw spreader
Authors: Malikov Vladimir , Katasonov Alexander , Shmykova Polina , Orekhovskaya Alexandra , Vanzha Vladimir , Sakhapov Rustem , Gainutdinov Ramil
Published: December 2024

In this article, a comprehensive analysis of existing materials, hardening methods, design and features of the work of parts in the composition of aggregates is carried out. Based on this analysis, the choice of material for the base and reinforcing coating was carried out, and the most effective ways of strengthening the blades of the straw spreader were determined, which are installed on combines instead of similar imported parts. In the course of the study, the spread of blanks and hardened parts by weight, the degree of wear of knives in real operation, as well as the chemical and phase composition, structure and properties of reinforcing coatings were studied. 65G steel is proposed as a modern import-substituting material, and 6HV2C steel is proposed as a promising one. To increase the hardness and wear resistance of the knife blade, the technology of induction surfacing of modified hard alloys (composites) using high-frequency transistor converters (inverters) with a programmable mode is proposed. This technique makes it possible to achieve a more uniform heat distribution and ensure high accuracy of temperature control during the surfacing process, which improves the mechanical properties of the coating. The use of boron carbide and spherical tungsten carbide as a wear resistance modifier makes it possible to increase the hardness of the coating to 62-67 HRC, suppress the growth of dendritic structures, increase the adhesion of the functional filler to the composite matrix, reduce dispersion and increase the microhardness of the carbide phase, which together increases the potential wear resistance of the coating. The use of induction surfacing of modified hard alloys on knife blades contributes to a significant increase in their service life by increasing resistance to mechanical damage and wear.
Determining the correlation between the throughput capacity of the grinder chamber of the smart corn thresher device
Authors: Fozilov G , Khudayberdiev Sh , Shodmonov Sh , Ravshanova G , Khusanov U
Published: December 2024

This article describes the technological scheme of a new innovative device consisting of a hopper, smart cameras, smart mechanisms that sort the cobs according to length, conveyors, rubber grips, conveyors moving against each other that squeeze the cobs, next to the conveyor there is a disc that cuts the tip and bottom (unnecessary) part of the ear corn. On the surface of the threshing drum there is a threshing rasp bar, and under the drum there is a concave, as well as an auger and an auger base. The device consists of a loader with an elevator for loading seeds, an electric motor, an output shaft. Also, a processor is installed for programming the device’s smart cameras and mechanisms. There is a grinder to grind the unwanted tip and bottom of the cob, unfit cobs smaller than 15 cm and the cores left over from crushed cobs as feed. In these studies, the number of holes Nh
in the grinding part of the device, their diameter, the permissible size of the gap between the holes, the diameter of the grinding chamber Dh
, and the height of the grinding chamber Hh
were determined.