bluuebunny/crossref_metadata_2025 huggingface dataset:
A multimodal physiological dataset for driving behaviour analysis
Authors: Tao Xiaoming , Gao Dingcheng , Zhang Wenqi , Liu Tianqi , Du Bing , Zhang Shanghang , Qin Yanjun
Published: April 2024

Physiological signal monitoring and driver behavior analysis have gained increasing attention in both fundamental research and applied research. This study involved the analysis of driving behavior using multimodal physiological data collected from 35 participants. The data included 59-channel EEG, single-channel ECG, 4-channel EMG, single-channel GSR, and eye movement data obtained via a six-degree-of-freedom driving simulator. We categorized driving behavior into five groups: smooth driving, acceleration, deceleration, lane changing, and turning. Through extensive experiments, we confirmed that both physiological and vehicle data met the requirements. Subsequently, we developed classification models, including linear discriminant analysis (LDA), MMPNet, and EEGNet, to demonstrate the correlation between physiological data and driving behaviors. Notably, we propose a multimodal physiological dataset for analyzing driving behavior(MPDB). The MPDB dataset’s scale, accuracy, and multimodality provide unprecedented opportunities for researchers in the autonomous driving field and beyond. With this dataset, we will contribute to the field of traffic psychology and behavior.
Dual pH/redox-responsive hyperbranched polymeric nanocarriers with TME-trigger size shrinkage and charge reversible ability for amplified chemotherapy of breast cancer
Authors: Badparvar Fahimeh , Marjani Ahmad Poursattar , Salehi Roya , Ramezani Fatemeh
Published: April 2024

A novel pH/redox-responsive hyperbranched MeO-PEG-b-(NIPAAm-co-PBAE) nanoparticles (NPs) were designed with size shrinkage and charge-reversible potential for targeted delivery of docetaxel (DTX) to MDA-MB-231 cell lines. In the tumor microenvironment (TME), amine protonation induces charge reversal and disulfide bond cleavage under high TME GSH concentration causing size shrinkage, improved deep tumor penetration, and active targeting of the therapeutic agents. These nano drug delivery systems (NDDSs) significantly promoted cancer cell uptake (~ 100% at 0.5 h), facilitating site-specific delivery and deep tumor penetration. The MTT assay revealed significantly higher cytotoxicity (P value < 0.0001) for DTX-loaded NPs compared to free DTX. Cell cycle analysis revealed G2/M (58.3 ± 2.1%) and S (21.5 ± 1.3%) arrest for DTX-loaded NPs, while free DTX caused G2/M (67.9 ± 1.1%) and sub-G1 (10.3 ± 0.8%) arrest. DTX-loaded NPs induced higher apoptosis (P value < 0.001) in MDA-MB-231 cells (71.5 ± 2.8%) compared to free DTX (42.3 ± 3.1%). Western blotting and RT-PCR assays confirmed significant up-regulation of protein levels and apoptotic genes by DTX-loaded NPs compared to free DTX. In conclusion, TME-responsive charge reversal and size-shrinkable smart NDDSs designed based on low pH, and high glutathione (GSH), offer more effective site-specific delivery of therapeutic agents to tumors.
Rarefied gas flow in functionalized microchannels
Authors: Kunze Simon , Perrier Pierre , Groll Rodion , Besser Benjamin , Varoutis Stylianos , Lüttge Andreas , Graur Irina , Thöming Jorg
Published: April 2024

The interaction of rarefied gases with functionalized surfaces is of great importance in technical applications such as gas separation membranes and catalysis. To investigate the influence of functionalization and rarefaction on gas flow rate in a defined geometry, pressure-driven gas flow experiments with helium and carbon dioxide through plain and alkyl-functionalized microchannels are performed. The experiments cover Knudsen numbers from 0.01 to 200 and therefore the slip flow regime up to free molecular flow. To minimize the experimental uncertainty which is prevalent in micro flow experiments, a methodology is developed to make optimal use of the measurement data. The results are compared to an analysis-based hydraulic closure model (ACM) predicting rarefied gas flow in straight channels and to numerical solutions of the linearized S-model and BGK kinetic equations. The experimental data shows that if there is a difference between plain and functionalized channels, it is likely obscured by experimental uncertainty. This stands in contrast to previous measurements in smaller geometries and demonstrates that the surface-to-volume ratio of 0.4 $$\upmu$$
μ
m$$^{-1}$$

-
1

seems to be too small for the functionalization to have a strong influence and highlights the importance of geometric scale for surface effects. These results also shed light on the molecular reflection characteristics described by the TMAC.
Determinants of multimodal fake review generation in China’s E-commerce platforms
Authors: Liu Chunnian , He Xutao , Yi Lan
Published: April 2024

This paper develops a theoretical model of determinants influencing multimodal fake review generation using the theories of signaling, actor-network, motivation, and human–environment interaction hypothesis. Applying survey data from users of China’s three leading E-commerce platforms (Taobao, Jingdong, and Pinduoduo), we adopt structural equation modeling, machine learning technique, and Bayesian complex networks analysis to perform factor identification, path analysis, feature factor importance ranking, regime division, and network centrality analysis of full sample, male sample, and female sample to reach the following conclusions: (1) platforms’ multimodal recognition and governance capabilities exert significant negative moderating effects on merchants’ information behavior, while it shows no apparent moderating effect on users’ information behavior; users’ emotional venting, perceived value, reward mechanisms, and subjective norms positively influence multimodal fake review generation through perceptual behavior control; (2) feature factors of multimodal fake review generation can be divided into four regimes, i.e., regime 1 includes reward mechanisms and perceived social costs, indicating they are key feature factors of multimodal fake review generation; merchant perception impact is positioned in regime 2, signifying its pivotal role in multimodal fake review generation; regime 3 includes multimodal recognition and governance capabilities, supporting/disparaging merchants, and emotional venting; whereas user perception impact is positioned in regime 4, indicating its weaker influence on multimodal fake review generation; (3) both in full sample, male sample, and female sample, reward mechanisms play a crucial role in multimodal fake review generation; perceived value, hiring review control agency, multimodal recognition and governance capabilities exhibit a high degree of correlation; however, results of network centrality analysis also exhibit heterogeneity between male and female samples, i.e., male sample has different trends in closeness centrality values and betweenness centrality values than female sample. This indicates that determinants influencing multimodal fake review generation are complex and interconnected.
New insights into pterosaur cranial anatomy: X-ray imaging reveals palatal structure and evolutionary trends
Authors: Chen He , Jiang Shunxing , Kellner Alexander W. A. , Wang Xiaolin
Published: April 2024

Among the least studied portion of the pterosaur skeleton is the palate, which tends to be poorly preserved and commonly only visible from one side (the ventral portion). Even in well-preserved specimens, the bones tend to be fused, with the limits of individual palatal elements obscured. To shed new light on this region, we employed advanced X-ray imaging techniques on the non-pterodactyloid Kunpengopterus (Wukongopteridae), and the pterodactyloids Dsungaripterus (Dsungaripteridae), Hongshanopterus (Istiodactylidae), and Hamipterus (Hamipteridae). Our analyses revealed the presence of sutures between palatal bones in Dsungaripterus and Kunpengopterus, which resulted in different interpretations of the relation between palatine, ectopterygoid, and pterygoid, leading to a new identification of the palatal openings. Furthermore, our study shows six main observations such as the variation of the angle between the palatine rami and the variation in the relative sizes of the palatal openings. We also point out that the presence of a maxillopalatine fenestra (previously identified as postpalatine fenestra), is unique within Diapsida. Although much more work needs to be done, we showed that advanced X-ray imaging techniques open a window for understanding pterosaur cranial anatomy and provide a new perspective for investigating the evolutionary history of these flying reptiles.
Philippine Sea plate and surrounding magmatism reveal the Antarctic-Zealandia, Pacific, and Indian mantle domain boundaries
Authors: Qian Shengping , Wu Jeremy Tsung-Jui , Wu Jonny
Published: April 2024

Delineation of geochemically distinct domains in Earth’s mantle is essential for understanding large-scale mantle convective flow and dynamics. Previous studies identify possible long-lived (>60 million-year) mantle isotopic domains (i.e. Antarctic-Zealandia, Pacific and Indian) near the Philippine Sea and western Pacific. Here we compile published basalt geochemistry of the Philippine Sea and surroundings and add new Mo isotopic and water content data for Gagua Ridge lavas, northwestern Philippine Sea, to distinguish slab-derived components during subduction. The water content, trace element, and Mo-Sr-Nd isotope compositions of Gagua Ridge arc lavas suggest that slab fluids and sediment melts are responsible for element recycling to the arc. The Philippine Sea basalts show both Indian and Zealandia-Antarctic Pb isotopic signatures; restoration of the basalt locations within a plate reconstruction shows the far-travelled Philippine Sea traversed these mantle domains. We establish the Indian mantle domain eastern boundary at ~120°E under SE Asia and the Indian Ocean. The Antarctic-Zealandia mantle domain lies south of ~10°N within the SW Pacific and has mostly remained in oceanic realms since ~400 Ma with only limited continental material input.
Two-dimensional monolayer C5-10-16: a metallic carbon allotrope as an anode material for high-performance sodium/potassium-ion batteries
Authors: Wang Wen-Chun , Dai Ya-Qun , Zhao Tian-Le , Ye Xiao-Juan , Zheng Xiao-Hong , Jia Ran , Liu Chun-Sheng
Published: April 2024

Two-dimensional C5-10-16 as an anode material for high-performance sodium/potassium-ion batteries.
Groundwater denitrification enhanced by a hydrogel immobilized iron/solid carbon source: impact on denitrification and substrate release performance
Authors: Yu Wenhao , Liu Lecheng , Yan Ni , Zheng Xilai
Published: April 2024

Different weight ratios of ZVI to solid carbon sources showed different substrate release behaviors and denitrification mechanisms.
Screening for urothelial carcinoma cells in urine based on digital holographic flow cytometry through machine learning and deep learning methods
Authors: Xin Lu , Xiao Xi , Xiao Wen , Peng Ran , Wang Hao , Pan Feng
Published: April 2024

Digital holographic flow cytometry, aided by machine learning and deep learning algorithms, was employed to screen for urothelial carcinoma cells in urine samples with varying osmotic pressures.
Enhanced catalytic activity and stability of SOFC electrodes through plasma-driven surface modification
Authors: Shin Hyunduck , Seo Jongsu , Jeon SungHyun , Jeong Seung Jin , Kim Jinwook , Lee Siwon , Lee Jeong Jin , Jung WooChul
Published: April 2024

Plasma-induced surface amorphization prevents Sr phase separation, boosting the catalytic activity and stability of SOFC cathode. This finding expands the application of amorphous features to practical electrodes, previously limited to model studies.
Broadly tunable filter based on a graphene MEMS-photonic crystal composite structure and its application in single-pixel full-color displays
Authors: Liu Wenjing , Li Guanghui , Chen Chaomeng , Liu Jiangtao , Li Zhi-Yuan
Published: April 2024

A graphene MEMS tunable narrowband filter with minimal deformation (<2 pm), high voltage sensitivity (>400 nm V−1), high tunable bandwidth (>200 nm) was proposed, achieving full-color display within a single pixel, color gamut reaching 214% of sRGB.
Electrochemical-induced solvent-tuned selective C(sp3)–H bond activation towards the synthesis of C3-functionalized chromone derivatives
Authors: Gao Ying , Wang Mingxu , Sun Jingxian , Zhao Xiao-Jing , He Yonghui
Published: April 2024

An unprecedented solvent-tuned electrochemical method for selective C(sp3)–H bond activation towards the synthesis of C3 functionalized chromone derivatives has been developed.
Bi2Te3 nanosheets promoted Pd for ethylene glycol electrooxidation both in the dark and under visible light irradiation
Authors: Ren Fangfang , Fei Zhenghao , Yang Yun , Wang Shuli , Feng Ligang
Published: April 2024

Bi2Te3 nanosheet-supported Pd nanoparticles were found to be effective in promoting ethylene glycol electrooxidation both in the dark and under visible light irradiation.
Correction: Not antiaromaticity gain, but increased asynchronicity enhances the Diels–Alder reactivity of tropone
Authors: Tiekink Eveline H. , Vermeeren Pascal , Hamlin Trevor A.
Published: April 2024

Correction for ‘Not antiaromaticity gain, but increased asynchronicity enhances the Diels–Alder reactivity of tropone’ by Eveline H. Tiekink et al., Chem. Commun., 2023, 59, 3703–3706, https://doi.org/10.1039/D3CC00512G.
Decoupling of ion-transport from polymer segmental relaxation and higher ionic-conductivity in poly(ethylene oxide)/succinonitrile composite-based electrolytes having low lithium salt doping
Authors: Mor J. , Sharma S. K.
Published: April 2024

Ionic-conduction and segmental relaxation in a poly(ethylene oxide)/succinonitrile composite-based electrolyte are decoupled, and the ionic conductivity is higher.
Polarization-dependent effects in vibrational absorption spectra of 2D finite-size adsorbate islands on dielectric substrates
Authors: Zerulla Benedikt , Krstić Marjan , Chen Shuang , Yu Zairan , Beutel Dominik , Holzer Christof , Nyman Markus , Nefedov Alexei , Wang Yuemin , Mayerhöfer Thomas G. , Wöll Christof , Rockstuhl Carsten
Published: April 2024

In this article, we analyze polarization-dependent effects in vibrational absorption spectra of 2D finite-size adsorbate islands on dielectric substrates. Using a multi-scale approach, we predict the transition from finite-size islands to a monolayer.
From field-induced to zero-field SMMs associated with open/closed structures of bis(ZnDy) tetranuclear complexes: a combined magnetic, theoretical and optical study
Authors: Zabala-Lekuona Andoni , Lopez de Pariza Xabier , Díaz-Ortega Ismael F. , Cepeda Javier , Nojiri Hiroyuki , Gritsan Nina P. , Dmitriev Alexey A. , López-Ortega Alberto , Rodríguez-Diéguez Antonio , Seco José M. , Colacio Enrique
Published: April 2024

Introducing a dicarboxylate linker in a linear tetranuclear bis(ZnDy) complex enables the serendipitous formation of a cyclic version of the system with a Ueff = 342 K.
Factors governing the protonation of Keggin-type polyoxometalates: influence of the core structure in clusters
Authors: Sampei Hiroshi , Akiyama Hiromu , Saegusa Koki , Yamaguchi Masahiro , Ogo Shuhei , Nakai Hiromi , Ueda Tadaharu , Sekine Yasushi
Published: April 2024

DFT calculation of Keggin-type polyoxometalates provided the first protonation sites and HOMO-LUMO gaps related to their total charge and bond valence.
Microplastics encapsulation in aragonite: efficiency, detection and insight into potential environmental impacts
Authors: Matijaković Mlinarić Nives , Marušić Katarina , Brkić Antun Lovro , Marciuš Marijan , Fabijanić Tamara Aleksandrov , Tomašić Nenad , Selmani Atiđa , Roblegg Eva , Kralj Damir , Stanić Ivana , Njegić Džakula Branka , Kontrec Jasminka
Published: April 2024

This study confirms encapsulation of nontreated and humic acid treated polystyrene and polyethylene microplastics into aragonite, main building block of coral skeleton.
What can quantum information theory offer to quantum chemistry?
Authors: Aliverti-Piuri Damiano , Chatterjee Kaustav , Ding Lexin , Liao Ke , Liebert Julia , Schilling Christian
Published: April 2024

QIT offers a comprehensive toolbox for electron correlation analysis, and development of new methods for solving the electronic problem. QChem in turn provides a platform to realize quantum technology, and supplies the valuable resource of quantum entanglement in molecules.
A polarization double-enhancement strategy to achieve super low energy consumption with ultra-high energy storage capacity in BCZT-based relaxor ferroelectrics
Authors: Sun Zixiong , Bai Yuhan , Jing Hongmei , Hu Tianyi , Du Kang , Guo Qing , Gao Pan , Tian Ye , Ma Chunrui , Liu Ming , Pu Yongping
Published: April 2024

Due to the combination of interfacial polarization and depolarization, the energy density of BCZT-based lead-free ferroelectric reached 8.03 J cm−3 at only 425 kV cm−1. High energy density with extremely low energy consumption was achieved.
Synthesis, characterization and properties of indium-doped manganese oxide molecular sieve sponges
Authors: Liu Zhenxin , Wang Xidong , Guo Xuehui , Wu Depeng , Xing Yu
Published: April 2024

Free-standing In-doped cryptomelane sponges are synthesized by resuspension/freeze-drying process. In-doping generates new FT-IR bands, weaken Raman bands, boost the activity of electrocatalytic oxygen reduction, and enhance electrical conductivity.
Copper-catalyzed oxidative sulfenylation and alkylation of indolin-2-ones for direct construction of sulfur-substituted quaternary carbons
Authors: Zhang Yun-Hao , Wang Yi-Nuo , Liu Zi-Yu , Zheng Si-Han , Li Guang-Lin , Feng Dexin , Xu Da-Zhen
Published: April 2024

A rapid and green one-pot access to S-substituted quaternary carbon centers from commercially available feedstock chemicals has been established, providing complex molecules with high chemoselectivity by the use of air as the terminal oxidant.
Simultaneously enhancing the mechanical robustness and conductivity of ionogels by in situ formation of coordination complexes as physical crosslinks
Authors: Yu Ning , Meng Yujiang , Li Rui , Mai Dongdong , Shan Shijie , Wu Xionghui , Lin Yaling , Zhang Anqiang
Published: April 2024

Ionogels with environmental tolerance have recently emerged as promising candidates for use in flexible electronics.
PEI-based all-organic composite films with simultaneous excellent energy storage density and high efficiency
Authors: Ma Yanlong , Lin Ying , Zhang Yongjing , Dang Zhener , Wang Yi , Yuan Qibin , Yang Haibo
Published: April 2024

Bilayer-structured PEI-based all-organic composite films with simultaneous excellent energy storage density and high efficiency.
Lightweight, elastic and conductive pure PEDOT:PSS foam for dual-mode sensing
Authors: Li Haibin , Luo Rubai , Hu Jingbo , Zhou Shisheng , Zhou Xing , Du Bin
Published: April 2024

Pure PEDOT:PSS foam with a multi-scale porous structure and dual-mode sensing characteristics.
Anthracene-[1]benzothieno[3,2-b][1]benzothiophene (BTBT) dyad and triads as p-type semiconductors for organic field-effect transistors and phototransistors
Authors: Qi Maowei , Zhang Dongwei , Zhu Yanan , Zhao Changbin , Li Aiyuan , Huang Fobao , He Yaowu , Meng Hong
Published: April 2024

[1]Benzothieno[3,2-b][1]benzothiophene (BTBT) and anthracene (An) are the most promising planar building blocks for constructing p-type small molecules for high-performance organic field-effect transistors (OFETs).
Synthesis of large-area high quality 2D BiOI for highly sensitive ultraviolet photodetection
Authors: Li Yixiang , Fu Zhipeng , Wang Bicheng , Yao Yu , Yuan Jiashuai , Li Meng , He Xu , Liu Wei
Published: April 2024

High-quality 2D layered BiOI crystals have been synthesized by a novel space-confined molten salt method.
An extremely low-power-consumption reconfigurable two-dimensional tellurene artificial synapse for bio-inspired wearable edge computing
Authors: You Bolim , Yoon Jeechan , Kim Yuna , Yang Mino , Bak Jina , Park Jihyang , Kim Un Jeong , Hahm Myung Gwan , Lee Moonsang
Published: April 2024

We fabricated a reconfigurable two-dimensional tellurene artificial synaptic transistor on a flexible substrate for bio-inspired wearable neuromorphic edge computing, showing an extremely low power consumption of 9 fJ and an impressive accuracy of 93% in recognizing MNIST patterns.
Me31B: a key repressor in germline regulation and beyond
Authors: Gao Ming
Published: April 2024

Maternally Expressed at 31B (Me31B), an evolutionarily conserved ATP-dependent RNA helicase, plays an important role in the development of the germline across diverse animal species. Its cellular functionality has been posited as a translational repressor, participating in various RNA metabolism pathways to intricately regulate the spatiotemporal expression of RNAs. Despite its evident significance, the precise role and mechanistic underpinnings of Me31B remain insufficiently understood. This article endeavors to comprehensively review historic and recent research on Me31B, distill the major findings, discern generalizable patterns in Me31B’s functions across different research contexts, and provide insights into its fundamental role and mechanism of action. The primary focus of this article centers on elucidating the role of Drosophila Me31B within the germline, while concurrently delving into pertinent research on its orthologs within other species and cellular systems.
Extrinsic Laryngeal Muscle Activity With Different Diameters and Water Depths in a Semi-Occluded Vocal Tract Exercise
Authors: Cha Junseo , Kim Chaehyun , Choi Seong Hee
Published: April 2024

Purpose:

Surface electromyography (sEMG) has been used to evaluate extrinsic laryngeal muscle activity during swallowing and phonation. In the current study, sEMG amplitudes were measured from the infrahyoid and suprahyoid muscles during phonation through a tube submerged in water.

Method:

The sEMG amplitude values measured from the extrinsic laryngeal muscles and the electroglottographic contact quotient (CQ) were obtained simultaneously from 62 healthy participants (31 men, 31 women) during phonation through a tube at six different depths (2, 4, 7, 10, 15, and 20 cm) while using two tubes with different diameters (1 and 0.5 cm).

Results:

With increasing depth, the sEMG amplitude for the suprahyoid muscles increased in men and women. However, sEMG amplitudes for the infrahyoid muscles increased significantly only in men. Tube diameter had a significant effect on the suprahyoid sEMG amplitudes only for men, with higher sEMG amplitudes when phonating with a 1.0-cm tube. CQ values increased with submerged depth for both men and women. Tube diameter affected results such than CQ values were higher for men when using the wider tube and for women with the narrower tube.

Conclusions:

Vocal fold vibratory patterns changed with the depth of tube submersion in water for both men and women, but the patterns of muscle activation differed between the sexes. This suggests that men and women use different strategies when confronted with increased intraoral pressure during semi-occluded vocal tract exercises. In this study, sEMG provided insight into the mechanism for differences between vocally normal individuals and could help detect compensatory muscle activation during tube phonation in water for people with voice disorders.
Spacer layers’ thickness impact on the resonant-tunneling diode’s and frequency mixer’s operational parameters
Authors: Cherkasov Kirill , Meshkov Sergey , Makeev Mstislav
Published: April 2024

The impact of spacer layers’ thickness on the resonant-tunneling diode’s (RTD) current-voltage characteristic and operational parameters of the RTD-based subharmonic mixer was studied during the described research using the software package developed by authors to simulate the RTD’s functional parameters while mixer’s parameters were simulated using existing microelectronic CAD. The research has revealed that the main impact on both RTD’s I-V characteristic’s shape and operational parameters of the studied subharmonic mixers is made by the emitter spacer layer’s thickness while the collector spacer’s thickness’ variation is insignificant in both cases. Such, it is shown that by varying the emitter spacer’s thickness from a single monolayer to twice its nominal value it’s possible to alter the RTD’s peak current from 0,28 to 1,92 of its nominal value. spacer layer’s thickness deviation of ±1 monolayer has a noticeable effect on the studied mixer’s operational parameters, especially on its dynamic range.
Some aspects of ventilation system quality indicators
Authors: Samarskaya Natalya , Pirozhnikova Anastasia , Chudnovets Lev
Published: April 2024

The article analyzes the factors affecting the performance and efficiency of industrial ventilation systems, as well as evaluated the technology and constructive reliability of indoor climate systems. The purpose of the work was to find ways to improve energy efficiency as a priority indicator of modern industrial ventilation systems in conditions of significant and ever-increasing need to save energy consumption costs. The work uses analytical research methods based on theories of probability and reliability of technical systems, analysis of known scientific and own practical results. In the course of the study, the results were obtained allowing to estimate the efficiency of the ventilation system not only in terms of the installed capacity and efficiency of the ventilation unit, but also taking into account such important indicators as energy efficiency, process reliability and functional purpose of the system. The ways of increasing the complex aerodynamic parameter of the ventilation system with the possible elimination of energy costs are determined.
Experience of the silicate reagents in oil and gas well drilling use
Authors: Aksenova Natalya
Published: April 2024

The article presents the analysis of incidents occurred while production drilling and side track drilling at the Samotlor field during the period from 2012 to 2023 and the relevance sticking problem occurrence with amount to more than 40%. The reason for the sticking in 90% of cases is the discrepancy between the drilling mud properties and the drilling well geological and technical condition. To prevent sticking the authors propose the boron-silicate solution (BSS) and its analogues use in the composition of drilling washing liquids. The BSS in well drilling high efficiency use is shown. Due to the combination of high inhibitory properties, low fluid loss and reinforcing properties at the same time the reagent allows to drill a well without complications, preserving the productive formation reservoir properties and the well cementing quality improving.
To evaluation of the efficiency of UzTE16M3 diesel locomotives on the high-speed section of the railway
Authors: Ablyalimov O.
Published: April 2024

The results of the calculation of the kinematic parameters of the movement of a freight train by a graphical method on a virtual hilly section of a high-speed railway when moving without stops and with stops at an intermediate and final station are presented. The values of energy efficiency indicators of UzTE16M3 diesel locomotives were obtained in quantitative and monetary terms when driving a freight train of a unified mass of train. The research results are presented in the form of tabular data and will be implemented by specialists of the locomotive complex in substantiating the efficiency of the transportation work of UzTE16M3 diesel locomotives in real operating conditions.
Detection of potential reservoirs of the Mezen syneclise of the Eastern European platform
Authors: Peskov Dmitry , Dovgan Irina , Kravchenko Vladislav
Published: April 2024

The possibility of discovering new hydrocarbon deposits within the north-eastern segment of the European part of Russia will reduce the cost of transporting hydrocarbons to major industrial centres. And access to Russia’s most important transport artery, the Northern Sea Route, in the context of the growing importance of the tanker fleet and reorientation of sales markets proves the need to build up the region’s resource base. However, it is necessary to take into account the environmental and climatic risks associated with hydrocarbon production in the Arctic conditions, as well as their transport. This paper presents the data of paleoreconstructions of sedimentation settings of Precambrian sedimentary strata in the light of updating the history of development of the Mezen-Belomr region and studying the reservoir properties of the Riphean-Wendian part of the sedimentary cover section. As a result, formations with enhanced filtration-capacity properties were identified. The Vendian part of the section is characterised by good values of open porosity (up to 20.89%).
Effective organization of acceleration of local train movement at railway transport departments
Authors: Barotov Jamshid , Kobulov Jamshid , Saidivaliyev Shuxrat , Sattorov Samandar , Fayzullayev Gaybullo , Kibishov Adylkhan
Published: April 2024

In the mentioned article, an analysis was conducted on the delay in providing services to local wagons due to the distance of up to 200 km between the sections located in the “UTY” joint-stock company. In this regard, works to improve the schedule of local trains have been carried out by extending the distance between two technical stations to 600-800 km. As a result of analyzing the options for transporting local wagons to technical stations in this article, movement schemes for local trains have been developed. The proposed schemes specify the movement of local trains from the initial station to the final station within the sections, as well as determining the movement from the initial station to halfway through the section. Through these schemes, operations carried out at intermediate and freight stations between two section stations in a mathematical manner have been investigated. These operations include operations such as coupling, uncoupling, and providing technical and cargo services to the wagons within the movement composition. In providing services to local trains on the section, two options were analyzed to obtain results: with the help of the second scheme we developed, during the movement of each train within the section, a possibility of saving 16 minutes of time was created.
Pyrolytic method for processing polymer composites
Authors: Soloveva Olga , Solovev Sergei , Voropai Lyudmila , Kuznetsova Olga , Sinitsyn Anton , Nazarova Marina
Published: April 2024

This article examines the process of catalytic one-stage pyrolysis using various polymer wastes. The proposed pyrolysis technology makes it possible to simultaneously obtain two adsorbents: impregnated clay and activated carbon. The influence of technological conditions on the yield of adsorbents and the quality of the porous surface has been established.
On a two-dimensional analogue of the Lebesgue function for Fourier-Chebyshov sums
Authors: Rustanov A.R. , Shikhshinatova M.M.
Published: April 2024

This article considers the problem of approximating a function of two variables f(x,y) by Fourier sums over Chebyshev polynomials orthogonal on a discrete grid. The paper shows that if Tα,βn(x, N) (α,β > -1, n = 0,1,2,...) are classical Chebyshev polynomials, orthogonal on a discrete grid, then the system of polynomials of two variables {Zα,βm,n(x, y)}km,n=0 = {Tα,βm(x, N)}km,n=0, where k = m + n ≤ N −1 is orthogonal on the set ΩN × N = {(xi, yj)}i,j=1N - 1. For an arbitrary function f(x,y) continuous on [−1,1]2, partial Fourier Chebyshev sums Sα,βm,n,N(f, x,y) are constructed over the system of polynomials τα,βm,n,N(x,y) orthonormal on the grid ΩN × N = {(xi, yj)}i,j=1N - 1. The task is to estimate the partial sum Sα,βm,n,N(f, x,y) of the Fourier series of the function f(x,y) from the system of polynomials τα,βm,n,N(x,y) from the function itself f ∈ C[-1, 1]2, in the case when(x,y) ∈ [−1,1]×[−1,1], which in turn reduces to the problem of estimating the Lebesgue function Wα,βm,n,N(x,y). The result of the work is a theorem in which it is proved that the order of the Lebesgue constants ‖Sα,βm,n,N‖ of the indicated discrete sums under certain conditions is O((mn)q+1/2), where q = max{α,β}. As a consequence of the obtained result, some approximation properties of discrete sums Sα,βm,n,N(f, x,y) are considered.
Modernization of cable skidding by finding the boundary conditions
Authors: Svoikin Fedor , Svoikin Vladimir , Borozna Anatoly , Taraban Maria , Shavelkin Denis
Published: April 2024

The article formulates the boundary conditions for the stability of the carriage during the passage of the carriage of the swivel shoe of the intermediate support, which makes it possible in the future to find the moment of friction between the hinge (determining the dependencies on the optimal distances between the supports and the height of the supports) to expand the theoretical and practical foundations for the use of cable skidding installation (CSI) with turns of the tracks in the plan. A constructive solution for the improvement of CSI by using a carriage with a double articulated wheel pair and an articulated carriage is proposed. This design allows the carriage to ensure the passage of turns by a bundle of skidding timber on a curved route of a non-existent cable. It is proposed to use existing designs of carriages in terms of moving and lifting loads. By connecting the fastening of the running wheels with two articulated joints, we actually get two dependent carriages moving along the carrier cable on one roller, which easily overcomes the turns of the cable. A significant advantage of articulated carriage is that its use does not require changes in the design of existing CSI. As well as the possibility of retrofitting any existing CSI with a carriage of the proposed design.
Treatment of plasma coatings by laser remelting
Authors: Babyuk G.F.
Published: April 2024

The article analyzes the effect of reflow and thermal cycling by laser beam on the structure and properties of plasma eutectic coatings. The facts of carbon diffusion into the solid phase at a distance of 150-200 microns with a laser pulse duration of 4 ms have been established. This is due to the high deformation rates that occur in the zone of thermal influence under pulsed laser action. This effect is aimed at increasing both the surface and volumetric strength of the sprayed coatings.
The stress state of a plate with several holes under the action of axial tensile load
Authors: Kazarinov Yu.I.
Published: April 2024

The purpose of the research is to develop a numerical method for determining the stress state of plates with several holes. The research approach is based on the development of the superposition method for singular solutions. The study objective is to solve a practical problem of determining the stress concentration coefficients in a plate with two holes of the same diameter. The study uses the numerical method of elasticity theory in the form of a superposition of four special solutions, each of which lies entirely within the corresponding hole contour. The resulting contour integrals in the displacement formula are replaced by their approximate values using the M-point trapezoidal formula or the Gaussian quadrature formula. Equating to zero the expression in variations of unknown constants (the principle of minimum potential strain energy), we have obtained a system of linear algebraic equations 4MN of unknown distribution densities. After determining the constants using known formulas, the stress-strain state of the plate with holes can be calculated. The error of the developed method is no more than 0.6% compared to the known solution.
Reactive power compensation and start-up energy waste reduction of linter device electric motor
Authors: Obidov Avazbek , Shamshitdinov Maqsudbek
Published: April 2024

In primary cotton processing enterprises, all electricity consumers, including the electricity consumption of the linter, especially the reactive power, are the compensation of the reactive power consumption. In particular, it is seen that the high power consumption of electric energy in the start time mode, which is present in all electric motors, can be eliminated through soft starts, and the effect of soft start on the device is studied.
Substantiation of the main parameters of a hammer crusher for grinding municipal solid waste
Authors: Khankelov T.K. , Rustamov K.J. , Irisbekova M. , Sabirova D.K.
Published: April 2024

The scientific novelty of the research lies in the determination and substantiation of the rational values of the main parameters of a hammer crusher designed for grinding organic components of municipal solid waste. A method has been developed for calculating the speed and effort, as well as the maximum elastic-plastic deformation of the components of the waste due to the collision of the waste against each other, against the wall of the working chamber of the crusher, as well as against knives welded on the walls of the working chamber at different heights at an angle of 120 degrees with each other. The aim of the study is to develop a hammer crusher design with low energy and material consumption with increased technical and operational performance. As a result of the experimental studies, the dependences of the crusher performance on the number of revolutions of the rotor shaft, on the light area of the grates, and on the diameter of the rotor were obtained. The processing of the obtained experimental data made it possible to obtain a mathematical model that adequately describes the process of crushing the organic components of the waste in a hammer crusher. Design and production of hammer crushers with rational parameters will reduce energy and material consumption by approximately 1.5-2.0 times compared to traditional designs.
Study of complex motion of a plane point at rotation of a supporting body
Authors: Oparina Ekaterina
Published: April 2024

The paper studies the kinematic characteristics of the complex motion of a point under the rotation of a supporting body. The trajectory of the point performing complex motion is obtained, and the graphs of changes in absolute velocity, absolute acceleration of the point and their components in time are obtained. The solution of the problem was carried out in Mathcad package, for which the problem formulation and solution was carried out by the matrix method. The use of the mathematical package allowed us to take chronograms of the processes of relative motion of the point, translational motion of the body and absolute motion of the point.
Use of artificial neural networks for solving the problem of residual resource estimation of hoisting cranes
Authors: Khvan Roman
Published: April 2024

The work is devoted to the problems of practical application of artificial neural networks (ANN) for estimation of residual resource of hoisting machines on the example of estimation of residual resource of bridge-type cranes. The work describes in detail the programming process of ANN which allows to determine the residual resource of metal structures of a hoisting crane depending on degradation of hardness of the metal structures material. The purpose of the work was to create new software for solving the problem of estimating the residual resource of the hoisting crane which appointed service life has ended. The basis for training of ANN was the existing knowledge of hoisting cranes operation, namely the statistical database of typical crane damages, expert assessment of the technical condition of hoisting cranes, and recommendations of the existing standards to identify defect indicators of hoisting cranes. The software is written in Python programming language. The work lists different ways of programming a neural network for an estimation of residual resource of hoisting cranes. The first way is more complex and painstaking and consists of writing the programme code of the neural network manually, the second way involves using a free interactive library Skicit-learn. A new software has been created to estimate the residual resource of hoisting cranes depending on degradation of hardness of metal structures material. The programme can be used by specialists and experts as an intellectual decision-making support system for determining the residual resource of hoisting cranes. The detailed algorithm of neural network programming is presented for possible use of this information in other areas of technical diagnostics of various mechanical engineering objects.
Mathematical models and algorithms for determining the modes of an intelligent stage control sensor
Authors: Aliev Ravshan , Matvaliyev Davronbek
Published: April 2024

In article discusses models of unlimited track circuits with a receiver, adapting to different working conditions, applied double receiver with one power supply in the middle, which allows you to extend the length of the continuous rail circuit. For this, a goal is set, in which is the development of models of jointless track circuits with an adaptive receiver, in which the rail line must take into account the total stress distribution along the rail line and disturbing factors. The article presents the equivalent circuits of continuous welded rail circuits with an adaptive receiver, algorithmic expressions for determining currents and voltages at the ends of the rail circuit, the coefficients of rail lines with an adaptive receiver are developed, calculation algorithms are presented. In conclusion, a graph is given, according to which it is shown that a continuous rail circuit with an adaptive receiver can operate with an insulation resistance three times lower than the threshold value in any modes of the rail circuit, taking into account the fact that, minimum allowable insulation resistance for tone-on-tone continuous rail circuits is taken as Ri=0,7ohm*km. Derived for the theory and synthesis of solutions, and also proposed new approaches to ensure the operating modes of the rail circuit, taking into account the real and weather conditions of operation.
Methodology for calculating the energy consumption of freight wagons during transportation by trains for private enterprises
Authors: Masharipov Masud , Gulamov Abdulaziz , Rasulov Marufjan , Suyunbaev Shinpolat , Khujaev Shokhijokhon , Mustafaeva Kamola
Published: April 2024

Fuel-energy consumption is one of the key factors in choosing the optimal type of locomotives for train operations. The quantity of fuel and energy used for train transportation is significantly influenced by the parameters of wagons and the transported goods. This article recommends an algorithm and an instrumental method in the form of software complexes for calculating the amount of fuel and energy resources used by locomotives of a private transportation company for train transportation under existing conditions, taking into account the planned cargo volume. Based on this, technical and technological solutions have been developed for selecting the planned and rational type of locomotives, considering the parameters of the wagon and the transported goods, the distance of transportation and the characteristics of the railway.
Environmental requirements in the standard for acceptance of petroleum products
Authors: Khisamova E.D. , Kodolova I.A. , Yusupova L.M. , Kaigorodova G.N. , Mustafina A.A. , Pyrkova G.K.
Published: April 2024

The article discusses the current state of the process of receiving petroleum products at a gas station in order to eliminate and reduce losses and cycle time. A methodology for preparing a standard for obtaining petroleum products is presented and the effectiveness of its use at a gas station is determined. A standardized sequence of actions made it possible to detect problems and losses and reliably evaluate the efficiency of production processes. Based on the established sequence of operations for the process of receiving petroleum products, the standard work instructions (SWI) indicate the time for performing a separate process operation, the total time of the production cycle, the trajectory of movement through the facility between workplaces, and the classification of work taking into account compliance with safety and environmental requirements. As a result of the redistribution of all operations in order to eliminate and reduce losses and process cycle time, the best sequence of actions was established, which ensured the efficiency of the process of receiving petroleum products and environmental safety during the operation of gas stations.
Tractor linkage loads with adjustable characteristics
Authors: Khaliullin Farit , Yakhin Sergey , Imameev Ayrat , Gayaziev Ilnar , Makarova Olga , Pikmullin Gennady
Published: April 2024

Efficient use of agricultural tractors is largely determined by the operating modes of its power units. Taking into account the variable nature of external loads, it is necessary to provide structural devices in the tractor, which smooth out changes in hook load, thus reducing the negative impact of external conditions on the operation of its power plant. The present paper is devoted to the design of a tractor attachment with variable characteristics. The methods of studying the variable traction force are analyzed on the output parameters of the technological process, as well as on the power and economic indicators of the power unit. Force analysis of the proposed attachment device is carried out and formulas are obtained to determine the forces and moments at the characteristic points of the device. The paper is of interest to engineers and technicians involved in the creation of promising design schemes for tractor tractors of various operational purposes.
Investigation of the effects of cavitation on different media in a device with a discrete secondary
Authors: Minkin Maxim , Kuimov Denis , Mazanko Maria
Published: April 2024

Preserving food and improving the quality of drinking water are of paramount importance to the public. Despite the very different objectives of food preservation and drinking water disinfection, these problems have in common the destruction of microorganisms. In this regard, the actual problem, which has been the focus of research in recent years, is the development of new technologies capable of non-thermal treatment of liquid substances and foodstuffs and not using chemical reagents. Hydrodynamic cavitation can be a promising technology for non-thermal treatment of liquid substances, including wastewater and food liquid products. This paper presents the results of our own study of the effect of cavitation on microorganisms under given conditions in a device with a discrete secondary part.
Die Irrtümer hinter der SIDS-Bauchlagekatastrophe
Authors: Paditz Ekkehart
Published: April 2024

Die SIDS-Häufigkeit konnte in Deutschland nach 1991 um mehr als 93 % vermindert werden, da in mehr als 40 Fall-Kontrollstudien nach Kriterien der Evidenzbasierten Medizin mehrere beeinflussbare SIDS-Risikofaktoren identifiziert werden konnten, zu denen insbes. auch die Bauchlage als Schlafposition von Säuglingen gehört.

Alfred Fabian Hess und David Greene setzten das pandemische Ereignis der SIDS-Bauchlagekatastrophe ungewollt in Gang, da sie 1931 ohne Faktenbasis behaupteten, dass Symmetrie das Prinzip des Lebens sei, sodass auch der kindliche Schädel symmetrisch sein müsse. Ohne entsprechende Laborbefunde behaupteten sie, dass sehr oft eine fetale Hypokalziämie vorliegen würde, die sich dann in einer Weichheit der Rippen und des knöchernen Schädels manifestieren würde, ohne dass klinisch, laborchemisch und röntgenologisch eine Rachitis vorlag. Hess präsentierte 2 Kinder, bei denen gleichzeitig weiche Rippen und okzipitale Abflachungen vorlagen. Greene berichtete über 6 Säuglinge mit okzipitaler Asymmetrie, die sich in 4 Fällen durch Fixierung des Kopfes mit Kopfhauben, Pflastern und Bändern verminderte.

Auf der Grundlage dieser spärlichen Datenbasis proklamierte Hess ein neues Syndrom mit weichen Rippen und Schädelasymmetrie, das erhebliche respiratorische Probleme bis zum letalen Ausgang verursachen könne. Greene polemisierte gegen die Rückenlage und rief zur Änderung der Lagerung von Säuglingen auf. Angesichts der erheblichen Autorität von Hess, der aufgrund seiner Verdienste in der Rachitisforschung mehrfach für den Nobelpreis vorgeschlagen wurde, setzten sich die Auffassungen von Hess und Greene für einige Jahrzehnte durch.