bluuebunny/crossref_metadata_2025 huggingface dataset:
Profiling humoral responses to COVID-19 immunization in Kawasaki disease using SARS-CoV-2 variant protein microarrays
Authors: Keskin Batuhan Birol , Liu Shih-Feng , Du Pin-Xian , Tsai Pei-Shan , Ho Tzong-Shiann , Su Wen-Yu , Lin Pei-Chun , Shih Hsi-Chang , Weng Ken-Pen , Yang Kuender D. , Huang Ying-Hsien , Kuo Kuang-Che , Syu Guan-Da , Kuo Ho-Chang
Published: August 2023

CoVariant arrays consist of spike variants of SARS-CoV-2. We profiled plasma neutralizing and binding antibodies in Kawasaki disease and healthy with unvaccinated, vaccinated, or infected with CoVariant arrays to compare their humoral responses.
Urine protein quantification in human urine on boron-doped diamond electrodes based on the electrochemical reaction of Coomassie brilliant blue
Authors: Aoki Hiroshi , Miyazaki Risa , Ohama Miho , Murata Michio , Asai Kai , Ogata Genki , Einaga Yasuaki
Published: August 2023

A novel sensing system for urine protein quantification in human urine is based on the electrochemical reaction of Coomassie brilliant blue on boron-doped diamond electrodes, with a detection limit of 2.57 and a linear response up to 400 μg mL−1.
Electrochemical aptasensor detection of electron transfer flavoprotein subunit beta for leptospirosis diagnosis
Authors: Kositanont Uraiwan , Srisawat Chatchawan , Sripinitchai Sirinapa , Thawornkuno Charin , Chaibun Thanyarat , Karunaithas Sinthu , Promptmas Chamras , Lertanantawong Benchaporn
Published: August 2023

Electron transfer flavoprotein subunit beta (ETFB) of Leptospira interrogans is a biomarker for diagnosing leptospiral infection.
Highly catalytic and stable Au@AuPt nanoparticles for visual and quantitative detection of E. coli O157:H7
Authors: Zhang Yanyu , Su Jiangshang , Fu Tingting , Zhang Wanzhen , Xiao Yujuan , Huang Yishun
Published: August 2023

An ELISA-like assay for visually and quantitatively detecting E. coli O157:H7 is established by using an anti-O157:H7 aptamer and highly catalytic and stable Au@AuPtNPs to overcome environmental variability.
Stimuli-responsive assembly and disassembly of anionic suprasomes with tunable antibacterial activity
Authors: Prusty Biswa Mohan , Karn Rama , Patel Anjali , Mazumder Priyanka , Kumar Sachin , Manna Debasis
Published: August 2023

Host–guest complexation-based suprasomes showed stimuli-responsive encapsulation and release of the benzimidazolium amphiphiles and commercial antibiotics in a controlled manner.
Label-free observation of DNA-encoded liposome fusion by surface plasmon resonance
Authors: Löffler Philipp M. G. , Risgaard Nikolaj A. , Svendsen Bettina L. , Jepsen Katrine A. , Rabe Alexander , Vogel Stefan
Published: August 2023

Assembly and fusion between different populations of lipid nanoparticles was mediated by membrane-anchored lipidated nucleic acid (LiNA) strands and observed using surface plasmon resonance (SPR) as a label-free real-time assay.
Controllable design of a macroporous PBA as an efficient non-enzymatic electrochemical sensor for glucose detection
Authors: Ying Shuanglu , Liu Tian , Kong Yuxuan , Jiang Qiao , Chai Ning , Yi Fei-Yan
Published: August 2023

A macroporous bird's nest-like CoFePBA nanomaterial was for the first time successfully obtained based on a two-step design strategy, realizing highly sensitive and selective electrochemical sensing of glucose.
14 examples of how LLMs can transform materials science and chemistry: a reflection on a large language model hackathon
Authors: Jablonka Kevin Maik , Ai Qianxiang , Al-Feghali Alexander , Badhwar Shruti , Bocarsly Joshua D. , Bran Andres M. , Bringuier Stefan , Brinson L. Catherine , Choudhary Kamal , Circi Defne , Cox Sam , de Jong Wibe A. , Evans Matthew L. , Gastellu Nicolas , Genzling Jerome , Gil María Victoria , Gupta Ankur K. , Hong Zhi , Imran Alishba , Kruschwitz Sabine , Labarre Anne , Lála Jakub , Liu Tao , Ma Steven , Majumdar Sauradeep , Merz Garrett W. , Moitessier Nicolas , Moubarak Elias , Mouriño Beatriz , Pelkie Brenden , Pieler Michael , Ramos Mayk Caldas , Ranković Bojana , Rodriques Samuel G. , Sanders Jacob N. , Schwaller Philippe , Schwarting Marcus , Shi Jiale , Smit Berend , Smith Ben E. , Van Herck Joren , Völker Christoph , Ward Logan , Warren Sean , Weiser Benjamin , Zhang Sylvester , Zhang Xiaoqi , Zia Ghezal Ahmad , Scourtas Aristana , Schmidt K. J. , Foster Ian , White Andrew D. , Blaiszik Ben
Published: August 2023

We report the findings of a hackathon focused on exploring the diverse applications of large language models in molecular and materials science.
N-Heterocyclic imine-based bis-gallium(i) carbene analogs featuring a four-membered Ga2N2 ring
Authors: Wang Bing , Chen Wenhao , Yang Jiangnan , Lu Linfang , Liu Jiyong , Shen Liang , Wu Di
Published: August 2023

A mixture of LDipNLi, tBuOK, and Cp*Ga gave rise to a dinuclear Ga(i) complex. X-ray structure analysis revealed its dimeric structure with a four-membered Ga2N2 ring and DFT studies indicated nonbonding lone pairs at each gallium centre.
Ruthenium(ii) polypyridyl complexes with visible light-enhanced anticancer activity and multimodal cell imaging
Authors: Kang Yan , Zhao Yao , Wei Yuanyuan , Zhang Yang , Wang Zhaoying , Luo Qun , Du Jun , Wang Fuyi
Published: August 2023

Ruthenium(ii) polypyridyl complexes generated a high level of singlet oxygen (1O2), and potent anticancer activities. Their subcellular distribution was profiled by fluorescence and ToF-SIMS imaging.
Hydrazylpyridine salicylaldehyde–copper(ii)–1,10-phenanthroline complexes as potential anticancer agents: synthesis, characterization and anticancer evaluation
Authors: Chen Yating , Ke Zhilin , Yuan Lingyu , Liang Meixiang , Zhang Shuhua
Published: August 2023

Cugdupt1–Cugdupt9 are potential pharmaceutical candidates for future anticancer treatment.
Impact of exposed crystal facets on oxygen reduction reaction activity in zeolitic imidazole frameworks
Authors: Pimu Sorawich , Yodsin Nuttapon , Maneewan Sirawee , Kanthachan Jaruwan , Namuangruk Supawadee , Kongpatpanich Kanokwan
Published: August 2023

The study of ORR performance of ZIF-67 in different facets obtained from the anisotropic crystal growth process. Three phases of ZIF-67 (bulk, cubic, and rhombic) were synthesized to study the impact of crystal facets on ORR activity.
Porous Ni3Fe intermetallic compounds as efficient and stable catalysts for the hydrogen evolution reaction in alkaline solutions
Authors: Li Li , Bai Zhongzhe , Gao Pingping , Lei Ting
Published: August 2023

Ni3Fe intermetallic compounds with porous structure and controllable phases fabricated via a facile powder metallurgy method exhibit promising HER activity and good corrosion resistance in alkaline electrolytes.
Mechanism of catalytic ozonation in different surface acid sites of oxide aqueous suspensions
Authors: Bing Jishuai , Xu Yuankai , Wu Congyu , Lv Xiufeng , Xiao Xin , Chen Li
Published: August 2023

Proposed mechanism of catalytic ozonation in different surface acid sites of oxide aqueous suspensions.
Pore size and electronic tuning in cerium-doped CoFe-LDH for the oxygen evolution reaction
Authors: Aggarwal Parul , Singh Bhupendra , Paul Amit
Published: August 2023

A series of cerium-doped CoFe-layered double hydroxide (LDH) materials were synthesized using a co-precipitation method, and they were utilized for the oxygen evolution reaction.
0D hybrid indium halide as a highly efficient X-ray scintillation and ultra-sensitive fluorescent probe
Authors: Li Dong-Yang , Shang Yan-Bing , Liu Qi , Zhang Hua-Wu , Zhang Xin-Yue , Yue Cheng-Yang , Lei Xiao-Wu
Published: August 2023

A family of new 0D hybrid indium halides as highly efficient yellow light emitters showcase multiple advanced applications in white light emitting diode, selective fluorescence sensing for nitrobenzene and X-ray scintillation performance.
Modeling and simulation for Cattaneo–Christov heat analysis of entropy optimized hybrid nanomaterial flow
Authors: Razaq Aneeta , Hayat Tasawar , Khan Sohail A. , Alsaedi Ahmed
Published: August 2023

Here, the hydromagnetic entropy optimized flow of a hybrid (Pb + Fe2O3/C2H6O2) nanoliquid by a curved stretchable surface is addressed.
Phase transformation analysis and process optimisation of low-grade lead–zinc oxysulphide ore carbothermal reduction
Authors: Hou Keren , Liu Bingguo , Zhou Zhonghua , Gong Siyu , Liu Jianping , Yuwen Chao , An Yunfei , Chen Wang , Wu Bangjian , Liu Zihu
Published: August 2023

The continuous exploitation of zinc blende resources leading to primary resources may not be sufficient for future requirements.
Ammonia surrogates in the synthesis of primary amines
Authors: Urbiña-Alvarez Julia , Rincón-Carvajal Sergio , Gamba-Sánchez Diego
Published: August 2023

This review provides a comprehensive summary of the utilization of ammonia replacements in synthesizing protected and free primary amines, encompassing both traditional reagents and the latest developments.
Synthesis, biocompatibility, and antimicrobial properties of glucose-based ionic liquids
Authors: Jopp Stefan , Fleischhammer Tabea , Lavrentieva Antonina , Kara Selin , Meyer Johanna
Published: August 2023

New carbohydrate-based ionic liquids are characterized, towards their thermal stability, biocompatibility and antimicrobial behavior. The results led to structure–property relationships and higher cell viabilities than most commercial ionic liquids.
Alkyl-substituted poly(arylene piperidinium) membranes enhancing the performance of high-temperature polymer electrolyte membrane fuel cells
Authors: Li Jinyuan , Yang Congrong , Zhang Xiaoming , Xia Zhangxun , Wang Suli , Yu Shansheng , Sun Gongquan
Published: August 2023

Alkyl-substituted poly(arylene piperidinium) membranes can modulate the content and distribution of phosphoric acid. The peak power density of HT-PEMFCs reaches 1.5 W cm−2, the maximum performance reported under 120 °C.
Particle size effect on the microstructure and the aging process of flash-sintered barium titanate from micro and nanopowders
Authors: López-Blanco Samuel , Vendrell Xavier , Mestres Lourdes , Ochoa Diego A. , García Jose E.
Published: August 2023

Flash sintering experiments on different-sized BTO powders are performed, and the influence of the conditions over the achieved microstructures and functional properties is shown. For smaller powder sizes a time instability of properties is revealed.
Peripheral engineering of Ir(iii) emitters with imidazo[4,5-b]pyrazin-2-ylidene cyclometalates for blue organic light emitting diodes
Authors: Yan Jie , Wu Yixin , Peng I-Che , Pan Yi , Yiu Shek-Man , Wong Ken-Tsung , Hung Wen-Yi , Chi Yun , Lau Kai-Chung
Published: August 2023

A new class of Ir(iii) carbene complexes with dualN-aryl appendages, the isomeric products of which were successfully isolated and purified by column chromatography, were synthesized followed by catalytic isomerization at elevated temperature.
Amorphous MOFs for next generation supercapacitors and batteries
Authors: Wang Wupeng , Chai Milton , Lin Rijia , Yuan Fangfang , Wang Lianzhou , Chen Vicki , Hou Jingwei
Published: August 2023

New opportunities and challenges associated with amorphous MOFs for energy storage.
Analysis of conductance and interfacial polarisation behaviours of silicone rubber based on frequency domain spectroscopy
Authors: Hu Hao , Jia Zhidong , Wang Xilin , Guan Ruiyang , Fan Weinan , Luo Simin
Published: August 2023

Silicone rubber (SR) is widely used for cable insulation and operates in multi‐stress coupling conditions. Its dielectric properties and ageing performance are the essential factors affecting cable operation. In this study, the frequency domain spectroscopy of unaged SR and SR aged under various conditions is measured. The dielectric responses before and after ageing are analysed in depth by the conjoint analysis via multiple complex planes (permittivity, conductivity, and modulus). Typical conductivity and interfacial polarisation properties, as well as property changes resulting from thermal and tensile ageing, are examined. Experimental results show that tensile ageing promotes conductance and interfacial polarisation, while thermal ageing shows the opposite effects. Based on the multi‐core model and charge carrier hopping transport model, thermal and tensile ageing mechanisms on the conductance and interfacial polarisation behaviours of SR are demonstrated. Both behaviours exhibit positively correlated changing characteristics, suggesting that the two behaviours may originate from a common process. The carrier transport process, promoted by the tensile effect and slightly suppressed by the thermal effect, is the primary factor and considered an important indicator to evaluate the dielectric properties of SR insulation.
Impact of electric vehicles on low‐voltage residential distribution networks: A probabilistic analysis
Authors: Hungbo Matthias , Gu Mingchen , Meegahapola Lasantha , Littler Timothy , Bu Siqi
Published: August 2023

The past two decades have seen a rapid increase in electric vehicles (EVs) for several reasons, such as policy directives to reduce carbon emissions in the transport sector and technology advancements in the EV industry. However, this has increased the load demand on the power grid, especially in the low‐voltage (LV) network, as most EVs are charged at EV owner premises. This paper investigates the impact of EVs on the LV residential distribution network using a probabilistic modelling framework. Probability distribution functions for EV charging power are derived using the United Kingdom (UK) EV dataset. The study has investigated multiple EV penetration levels, different probability distribution functions for EV charging representation, vehicle‐to‐grid (V2G), solar photovoltaic (PV) generation, and the volt‐var capability of the solar‐PV inverter. The results have shown that as EV penetration increases in the distribution network, there is a significant increase in transformer loading and a decrease in the steady‐state voltage levels. V2G has positively impacted the distribution network. A case study carried out on a real LV feeder with solar‐PV generation has shown how PV generation and volt‐var functionality of the PV inverter help reduce the impact of EV charging and V2G.
Distributed demand response charging control of multiple plug‐in electric vehicle clusters
Authors: Yu Jie , Hu Jianqiang , Li Cheng , Zhang Qingjie , Liu Chuan , Liu Shidong
Published: August 2023

This paper is devoted to the distributed demand response (DR) charging control of plug‐in electric vehicles (PEVs) for frequency regulation in power systems in terms of load following service. Specifically, PEVs are divided into different clusters according to their parking place under different energy management systems. Each EV cluster is modelled by a transport‐based load aggregate model with the input being the charging rate, and the output is the aggregate power. Based on the aggregate charging control model, a novel dynamic real‐time distributed pinning control algorithm is proposed to coordinate the charging rates such that the aggregate charging power of PEVs can follow a given reference power trajectory. The theoretical analysis shows that if the reference power profile is in the trackable area of all PEVs' charging power and the ramping rate is restrained by a predefined bounded constraint, then the demand response charging tracking control is solvable. Finally, simulation results on an EV system with twelve PEV clusters are presented to show the effectiveness of the proposed demand response control algorithm.
Astrometry in crowded fields towards the Galactic bulge
Authors: Luna Alonso , Marchetti Tommaso , Rejkuba Marina , Minniti Dante
Published: August 2023

Context. The astrometry towards the Galactic bulge is hampered by high stellar crowding and patchy extinction. This effect is particularly severe for optical surveys such as the European Space Agency satellite Gala.

Aims. In this study, we assess the consistency of proper motion measurements between optical (Gaia DR3) and near-infrared (VIRAC2) catalogues in comparison with proper motions measured with the Hubble Space Telescope (HST) observations in several crowded fields towards the Galactic bulge and in Galactic globular clusters.

Methods. Assuming that the proper motion measurements are well characterised, the uncertainty-normalised proper motion differences between pairs of catalogues are expected to follow a normal distribution. A deviation from a normal distribution defines the inflation factor r. By multiplying the proper motion uncertainties with the appropriate inflation factor values, the Gaia (VIRAC2) proper motion measurements are brought into a 1σ agreement with the HST proper motions.

Results. The inflation factor (r) depends on stellar surface density. For the brightest stars in our sample (G < 18), the dependence on G-band magnitude is strong, corresponding to the most precise Gaia DR3 proper motions. We used the number of observed Gaia DR3 sources as a proxy for the stellar surface density. Assuming that the HST proper motion measurements are well determined and free from systematic errors, we find that Gaia DR3 proper motion uncertainties are better characterised, having r < 1.5 in fields with a stellar number density with fewer than 200 Gaia DR3 sources per arcmin2, and are underestimated by up to a factor of 4 in fields with stellar densities higher than 300 sources per arcmin2. For the most crowded fields in VIRAC2, the proper motion uncertainties are underestimated by a factor of 1.1 up to 1.5, with a dependence on J-band magnitude. In all fields, the brighter sources have the higher r value. At the faint end (G > 19), the inflation factor is close to 1, meaning that the proper motions already fully agree with the HST measurements within 1σ.

Conclusions. In the crowded fields common to both catalogues, VIRAC2 proper motions agree with HST proper motions and do not need an inflation factor for their uncertainties. Because of the depth and completeness of VIRAC2 in these fields, it is an ideal complement to Gaia DR3 for proper motion studies towards the Galactic bulge.
The truncation of the disk of NGC 4565
Authors: Martínez-Lombilla Cristina , Infante-Sainz Raúl , Jiménez-Ibarra Felipe , Knapen Johan H. , Trujillo Ignacio , Comerón Sébastien , Borlaff Alejandro S. , Román Javier
Published: August 2023

Context. The hierarchical model of galaxy formation suggests that galaxies are continuously growing. However, our position inside the Milky Way prevents us from studying the disk edge. Truncations are low surface brightness features located in the disk outskirts of external galaxies. They indicate where the disk brightness abruptly drops, and their location is thought to change dynamically. In previous analyses of Milky Way-like galaxies, truncations were detected up to 3 kpc above the mid-plane, but whether they remain present beyond that height remains unclear.

Aims. Our goal is to determine whether truncations can be detected above 3 kpc in height in the Milky Way-like galaxy NGC 4565 and thus establish the actual disk thickness. We also aim to study how the truncation relates to disk properties such as star formation activity or the warp.

Methods. We performed a vertical study of the disk of the NGC 4565 edge in unprecedented detail. We explored the truncation radius at different heights above and below the disk mid-plane (0 < z < 8 kpc) and at different wavelengths. We used new ultra-deep optical data (μg,lim = 30.5 mag arcsec−2; 3σ within 10 × 10 arcsec2 boxes) in the g, r, and i broadbands, along with near-ultraviolet, far-ultraviolet, Hα, and H I observations.

Results. We detect the truncation up to 4 kpc in the g, r, and i ultra-deep bands, which is 1 kpc higher than in any previous study for any galaxy. The radial position of the truncation remains constant up to 3 kpc, while higher up it is located at a smaller radius. This result is independent of the wavelength but is affected by the presence of the warp.

Conclusions. We propose an inside-out growth scenario for the formation of the disk of NGC 4565. Our results point towards the truncation feature being linked to a star-forming threshold and to the onset of the disk warp.
Deep-learning-based radiointerferometric imaging with GAN-aided training
Authors: Geyer F. , Schmidt K. , Kummer J. , Brüggen M. , Edler H. W. , Elsässer D. , Griese F. , Poggenpohl A. , Rustige L. , Rhode W.
Published: August 2023

Context. The incomplete coverage of the spatial Fourier space, which leads to imaging artifacts, has been troubling radio interferometry for a long time. The currently best technique is to create an image for which the visibility data are Fourier-transformed and to clean the systematic effects originating from incomplete data in Fourier space. We have shown previously how super-resolution methods based on convolutional neural networks can reconstruct sparse visibility data.

Aims. The training data in our previous work were not very realistic. The aim of this work is to build a whole simulation chain for realistic radio sources that then leads to an improved neural net for the reconstruction of missing visibilities. This method offers considerable improvements in terms of speed, automatization, and reproducibility over the standard techniques.

Methods. We generated large amounts of training data by creating images of radio galaxies with a generative adversarial network that was trained on radio survey data. Then, we applied the radio interferometer measurement equation in order to simulate the measurement process of a radio interferometer.

Results. We show that our neural network can faithfully reconstruct images of realistic radio galaxies. The reconstructed images agree well with the original images in terms of the source area, integrated flux density, peak flux density, and the multiscale structural similarity index. Finally, we show that the neural net can be adapted for estimating the uncertainties in the imaging process.
Optimization of transport flows of the grain storage
Authors: Ilesaliev Daurenbek , Kobulov Jamshid , Svetasheva Nargiza , Tursunkhodjaeva Rashida , Abduvakhitov Shahboz
Published: August 2023

Ensuring uniform supply of wagons for loading and unloading of goods is one of the main tasks of the transport process. Existing methods for solving the issues of ensuring the rhythmicity of the supply of wagons for loading grain are not often allowed to identify the causes of the technological shortage of wagons. In this regard, within the framework of this work, the aim of the study is to increase the efficiency of the organization of providing grain storage with wagons using models.
Technologies of the sixth technological mode in Russian transport and logistics ecosystem
Authors: Vorobyov Alexander , Drozdova Inga
Published: August 2023

The article considers advanced intellectual technologies of the sixth technological mode as a leading component of the development of the Russian transport and logistics ecosystem in the current geopolitical situation. The results of the study show that it is the level of implementation of digital services and digital connectivity between participants in the transport and logistics market that will be the determining factors in the process of increasing the competitiveness and efficiency of the transport industry. The results of the current stage of digital transformation of the industry are described, the concept of logistics development in the context of the current geopolitical agenda is presented. It can be deemed that further scaling up of the digital services utilization in transport and logistics ecosystems will secure transport and digital sovereignty of the Russian Federation in the context of the current geopolitical challenges and facilitate an increase in competitiveness of the Russian transport system for Industry 4.0.
The main directions for optimizing traffic flows to increase their throughput
Authors: Shamlitsky Yaroslav , Popov Anatoly , Morozov Evgeny , Devyatkov Alexandr
Published: August 2023

This paper analyzes various problems of mathematical modeling of traffic flows that are relevant for optimizing and reducing the congestion of road networks in large cities and metropolitan areas. Various types of relationships between traffic lights on a controlled section of the road have been studied, formulas have been proposed for calculating the optimal joint mode of operation and minimizing the formation of traffic jams in front of the intersection. A model for calculating the optimal traffic flow on a section of the road network and its implementation at the program level are proposed.
Development of international road transport services in the Kyrgyz Republic under the EAEU conditions
Authors: Ajekbarov Kanybek , Kamchybekov Tolobek , Amankulov Marat , Alisherov Eldar , Niyazbekova Shakizada
Published: August 2023

The paper considers the development of international road transport services in the prism of digitalization of its processes. The current state of international road transport in the Kyrgyz Republics analyzed. Projects and expected effects of digital transformation are described. The EAEU, including the Kyrgyz Republic, has significant transport and transit potential, for the implementation of which a project on the formation of a digital ecosystem of transport corridors was launched in September 2021. The development of transport corridor services is a key aspect of the development of unhindered movement of goods in the EAEU space and can provide conditions conducive to the restoration of economic activity of the Kyrgyz Republic and its partners in the Union after restrictions due to the spread of coronavirus infection.
Development of a system for protecting against DDoS attacks at the L7 level of the OSI model - HTTP Flood
Authors: Razumov Pavel , Lyashenko Kirill , Cherckesova Larissa , Revyakina Elena , Yengibaryan Irina , Revyakin Alexander
Published: August 2023

In today’s world of globalization and the development of information technology, it is not possible to build a business and production without using the latest advances in science and technology related to information technology. The most promising branches of the direction of information technology are the development and application of cryptographic means of protecting information for various purposes, including the use by government bodies and commercial organizations, the implementation of electronic document management tools, the expansion of the use of encryption schemes based on public keys and means of protecting web resources from DoS attacks. It is necessary to give the following assessment that the problem of countering and repelling Denial of Service attacks is an urgent problem in connection with the widespread introduction of information technologies and the globalization of the Internet, which, in turn, requires effective protection methods corresponding to the adequate cost of providing services. This paper proposes a practical implementation of a technique for detecting one of the most common DDoS attacks at the L7 level of the OSI model - HTTP Flood.
On a probabilistic backoff distribution for IEEE 802.11 DCF networks
Authors: Zyulkov Alexander , Korchagin Yury , Karimov Baktybek , Chernoiarova Elena , Salnikova Alexandra
Published: August 2023

For the DCF protocol model at the data link layer and in a saturated network, the self-similar structure of the probabilistic distribution of a data transmission time is studied, and both exact and approximate expressions for the distribution are obtained. A comparison with the simulation results is carried out.
Analysis of the differences between Wi-Fi 6 and Wi-Fi 5
Authors: Tokhirov Ezozbek , Aliev Ravshan
Published: August 2023

While Wi-Fi 5 is still sufficient for many organizations and businesses, it is important to consider and upgrade to Wi-Fi 6. This article discusses the main differences between Wi-Fi 5 and Wi-Fi 6. The goal is to identify key metrics transmission of information content of signals, a method for determining the best use of Wi-Fi signals for certain categories of use, an analysis and study of the influence of frequencies on the quality of transmitted information, and also analyzes the growth rate of an organization using these technologies. Using the Orthogonal Frequency Division Multiple Access connection principle, Wi-Fi 6 technology provides the main advantage of performing multiple receptions and transmissions at the same time. Multiple User Multiple Input Multiple Output technology allows routers to communicate with all devices at the same time, resulting in maximum packet exchange. Using the Basic Service Set (BSS) color scheme, we can see that Wi-Fi 6 is far ahead of previous technologies.
Dynamically changing bottom relief modeling based on spatially inhomogeneous 3D mathematical model of wave hydrodynamics
Authors: Sukhinov A.I. , Kholodkov V.V. , Protsenko E.A. , Protsenko S.V.
Published: August 2023

The article is devoted to the construction and adaptation to natural and climatic conditions and geographical features of precision mathematical models of hydrodynamics of wave processes and relief formation. The incompleteness of data is characteristic of the new tasks considered in the article, the solution of this problem is carried out by involving remote sensing and cadastral survey data. It is essential to include in this complex algorithm for constructing raster models of dynamically changing bottom relief based on known cadastral survey data and remote sensing data. The software package described in this paper makes it possible to reduce the forecast time of hydrophysics processes, including dangerous and catastrophic phenomena. On the basis of the developed software package, prognostic calculations of the processes of coastal erosion and changes in the bottom relief were performed. Modeling of the state of a water body takes into account the characteristic features of natural processes, among which it is worth noting the spatial and temporal variability of relief formation.
Development of the architecture of a transformer-based neural network model to automate delivering judgments in bankruptcy cases
Authors: Pylov Petr , Maitak Roman , Dyagileva Anna , Protodyakonov Andrey
Published: August 2023

Delivering judgments is one of the brightest examples of solving a creative problem, which implies not only the analysis of data presented in natural language, but also the verification of the compliance of the input information with legal norms and rules. Automation of this process requires the creation of such a language model of machine learning that would allow processing natural language and delivering judgments based on the legal framework, thereby completely replacing the position of a judge. Serious functional requirements are imposed on such an intelligent system, which describe the system of constraints for the architecture of a machine learning model in a formalized mathematical language. This article is devoted to defining the rules for building an applied artificial intelligence model that would automate the process of delivering judgments in bankruptcy cases.
Designing a microservice architecture on the example of an automated application for the HR department
Authors: Kolyeva Natalya , Kortenko Liudmila , Radkovskaya Elena
Published: August 2023

This article discusses the use of microservices in the context of HR processes and proposes a specific architecture to achieve this goal. The article is of interest to everyone who is interested in improving processes using the latest technologies.
The solution of the transport problem by the method of the smallest element based on the use of complex numbers in the algorithm
Authors: Yekimov Sergey , Salkova Daniela , Belyaev Vladislav , Kucherenko Dmitriy , Klyukanov Aleksey , Shmoilov Andrey
Published: August 2023

To determine whether a transport problem has a solution , you can use the Lagrange multiplier method . To do this, it is advisable to replace variables so that the objective function is a sum of exponentials. The peculiarity of the sum of exponents is that the principal diagonal minors of the Hessian of the sum of exponents are positive quantities , and therefore the sum of exponents has an extremum and this extremum is the minimum. Solutions of large - dimensional transport tasks are of great practical importance for optimizing transportation schedules by transport enterprises . There are several algorithms for solving this problem, but the development of other methods for solving the transport problem that would use computing power more efficiently deserves attention. The method proposed in this paper for solving the transport problem based on the use of complex numbers in the algorithm makes it simpler and more visual for practical application.
Information system for managing the register of serialized items based on a cloud service for enterprise economic development
Authors: Bondarev Oleg , Killer Artyom , Abakumov Alexey , Solovyov Alexander , Lelyuk Daniil
Published: August 2023

This article describes the development of an information system for managing the register of serialized items based on a cloud service. Cloud services provide the ability to access computer equipment, hardware resources, disk memory and databases via the Internet in a remote format. The developed information system belongs to the type of information retrieval system. Examples of cloud services include: renting a virtual server; virtual contact center; application rental; data store; private cloud. For development, you need to use the services of cloud services for renting a virtual server.
Evaluation of the efficiency of the friction tread brake of the diesel motor car
Authors: Khurmatov Ya. A. , Khaydarov O. U. , Abdullaev B. A. , Djabbarovand Sh. B. , Inagamov S. G.
Published: August 2023

The article considers and calculates the brake system of a two-axle service diesel motor car, consisting of two brake subsystems acting separately on two axles of the diesel motor car, provided that each axle is served by one brake cylinder 501b. A calculation was made in order to evaluate the effectiveness of the friction tread brake of the service diesel motor car model AS-01uz.
The use of serial automotive equipment when performing special lifting tasks
Authors: Amosov Alexey
Published: August 2023

The solution to the problem of increasing the productivity of tow trucks and cranes on the chassis of serial cars largely depends on the solution to the issues of mastering the production of new types of heavy lifting capacity, the development and creation of progressive technological processes of maintenance and operation. Compared to a simple truck, vehicles equipped with a manipulator have a number of advantages: higher technical and economic indicators; the ability to vary the carrying capacity over a wider range; service by one driver of several transport units and others. The efficiency of using such units is mainly determined by the totality of their operational properties, which require rational management at the stages of design, production and operation. There are many types of lifting mechanisms for loading units, the most common of which are structures in the form of a telescopic boom and in the form of a combined loading device. The aim of this work is to create and parametrize the invariant structure of a telescopic boom in such a way that, when changing its parameters, it would be possible to obtain an arrow of any kind. The presented consideration shows that the use of such machines and assemblies is a wide area, in the study of which it is necessary to apply many branches of modern natural science and technology. There is no doubt that both the growth of research in this area and an increase in the volume of practical applications of objects of this type will continue.
The role of differential equations in research car traffic
Authors: Amosov M. M. , Khikmatova R. A. , Safarbayeva N. M. , Ochilova N. M. , Toshmatova M. M.
Published: August 2023

This article includes some methods and techniques of solving differential equations, which is effectively used in solving physical and mechanical problems encountered in motor vehicles. As a sample, some formulas and applying tasks were given to the students to improve their skills.
Manufacture of high-temperature electric heaters based on the solar energy
Authors: Suvonova L. S. , Imomov Sh. Zh. , Abdullaeva B. , Sapaev I. B. , Shakhobiddinova Z. , Choriev R. K.
Published: August 2023

The role of the solar energy as a natural energy source for the synthesis of electric heatersis discussedin this article. The work of famous scientists on the development of the field of using energy devices based on solar energy in heat supply systems is presented. In addition, you will get acquainted with the most popular and probably unfamiliar electric heaters, their types, and modes of operation. You will also learn about the process of making electric heaters imported to date based on solar energy. Where and why electric heaters are used, their functions, you will be able to use a local product that completely replaces the imported product.
Improving the energy efficiency of the solar heat supply system of buildings based on vacuum collectors
Authors: Kanareykin Aleksandr
Published: August 2023

Currently, many residential buildings and businesses use solar water heating systems. This is an economical and reliable type of hot water supply. Heating water for domestic purposes or heating using solar energy is a natural and simple method of saving energy and preserving fossil fuel reserves. The use of renewable energy sources is relevant for all countries of the world. The article deals with the issue of improving the energy efficiency of the solar heat supply system of buildings based on vacuum collectors with natural circulation of the coolant.
Results of theoretical and experimental studies of the tilt-multistage solar water desalination plant
Authors: Juraev Khusniddin , Mirzaev Mirfayz
Published: August 2023

This paper presents the results of an experimental study of an inclined-multistage solar water desalination device in the climatic conditions of the Bukhara region. At the same time, changes in temperature in the elements of the device during the season and during the day, as well as changes for water received from the device at this time, are shown in the graphs. Studies carried out in natural conditions showed that the maximum water consumption of 7.5 liters was reached from the surface of 1m2 of the device in July. Based on the generalization of the results of numerous experimental studies, a regression equation was developed that evaluates the effectiveness of the device.
Wind velocity data interpolation using a weighted cubic spline
Authors: Romadanova M.M.
Published: August 2023

To predict meteorological conditions, it is essential to construct interpolating functions considering the nature of the data. The paper addresses an algorithm for constructing a weighted cubic spline that preserves the monotonicity of the data. The implementation of this algorithm is shown through the example of wind velocity data interpolation when it is required to maintain the positivity of the values. Wind velocity always takes positive values, and its minimum value can be very close to zero. The paper shows that in such a case the construction of an ordinary cubic spline can result in negative values. It presents several numerical examples for the implementation of the proposed algorithm at different sets of initial parameters and makes it possible to draw comparison with the construction of a simple cubic spline and the construction of a spline in MATLAB.
Improving the reliability of operation of the complex of structures of the kuiganyar hydraulic unit
Authors: Uljayeva Farokhiddin , Amanov Bakhodirjon , Jumaniyazova Nodira
Published: August 2023

The article is devoted to the issues of assessing the reliability and safety of the hydraulic system located on the Karadarya River in the Andijan region of the Republic of Uzbekistan. The results of actual measurements and their comparisons with the requirements for hydropower facilities according to the technical design and current standards building codes and rules (BCR) are presented such key indicators as: maximum and minimum costs, marks of water horizons, marks of the bottom of the inlet and outlet riverbeds; stock of the top of dams and structures over forced water horizons; stability of slopes and the integrity of their fastening in normal and forced operating conditions; siltation of the supply channel and erosion of the bottom of the river behind the shield dam; filtration strength of the soil of the base of structures; vertical precipitation and horizontal displacement of parts of structures; the integrity of concrete elements (bulls, foundations, apron walls, ponuros, etc.); condition of shutters, lifting mechanisms, gate position sensors (DPZ-500) and water levels (WL); conducting routine tests of electric motors, transformers, power and lighting wires for compliance with POC and PTS. Recommendations are given for the safe operation of the Kuyganyar hydroelectric complex.
Spectral and cross-spectral densities expressions’ refinement for rail vehicle oscillations
Authors: Savoskin Anatoly , Lavlinskaya Natalia
Published: August 2023

In this paper, we derive analytical expressions describing spectral and mutual spectral densities of random processes by performing analytical Fourier transform of the corresponding correlation functions. On the basis of accepted analytical expressions for correlation functions of differentiable random processes, analytical expressions for spectral density and mutual spectral density components, which is a complex frequency function, are derived. The influence of the accepted analytical expressions on the correlation functions, spectral densities, and mutual spectral density components (real, imaginary, amplitude, and phase) on the parameters is presented. Plots obtained using obtained analytical expressions have showed full convergence with those obtained by direct integration of the analytical expression of the correlation function. The analytical expressions given in this paper may be used for investigating various random processes. In particular, spectral and reciprocal spectral densities can be used for approximation of experimentally received spectral densities, including equivalent geometrical irregularities of a rail track and random fluctuations of a rail vehicle. The parameters of analytical expression obtained by such an approximation can be used for generation of analogous experimental multidimensional random processes in the tasks of mathematical modelling.
Algorithms for preliminary assessment of the technical condition of social buildings
Authors: Ashikhmin Oleg , Zazulya Yuri
Published: August 2023

The article presents a rational approach to a preliminary assessment of the technical condition of structural elements of social buildings. The authors use the example of kindergartens and schools in the city of Tyumen/ They take into account the date of construction, characteristics of structures and the possibility of choosing effective methods for carrying out repair work. The dependence of the detected damage on the type of structural elements and the building year was revealed. There is also given a rational sequence of actions for assessing the technical condition of building structures with recommendations for their elimination.
Methods of Parametricism in the architecture of children’s supplementary education facilities
Authors: Saltykov Ivan , Gnetova Anastasiia
Published: August 2023

The purpose of this article is to show the problem of design and construction of art schools in large Russian cities. The absence of attractive solutions of facades does not mark out the schools of arts from the mass of urban development. To solve the posed problem there are presented the possibilities of using the methods of parametric architecture for designing schools of art by computer modeling. By using unique room layouts, interesting planning the territory of buildings, unusual types of facades, it is possible to get children’s attention to such a type of schools, to motivate them to study here and to get new experience in their chosen field of activity. The authors examined the methodology of architectural design and the concept of parametricism as a modern way of modelling architectural space. We have analyzed some parametric design methods. Artificial intelligence and modern computer technology introduce a number of fundamentally new methods of parametric and compositional design. The application of parametric modelling methods is shown on the example of art school’s design-project to prepare children for admission to architecture or art high schools.
Standardization in the field of design work
Authors: Kuprikov N. M. , Temicheva N. Yu.
Published: August 2023

The authors take the aviation industry as an example and the positive changes it has undergone since the standardisation reform. The aviation industry standardization programme for 2016 - 2020 is the main prospective standardization programme for the aviation industry. Under the current legislation in the Russian Federation in the field of standardization the creation and maintenance of an up-to-date fund of normative and technical documents is a powerful tool for the development of the aviation industry as one of the key high-tech and most knowledge-intensive sectors of the domestic economy, which is among the priority areas of the state industrial policy and import substitution policy.
Formation of multistory residential complexes for Nukus City
Authors: Khayrova T.
Published: August 2023

The article reflects the current state of housing construction in the Republic of Karakalpakstan and in the city of Nukus in a hot climate. The impact of the external environment of low-rise and multistory residential buildings, their description and their impact on the architecture of the buildings are considered. Targets and ways to improve housing projects have been identified.
Cost model for managing an apartment building in Kazakhstan
Authors: Birmagambetov Talgat , Yessymkhanova Zeinegul , Khazin Daniil
Published: August 2023

The article presents foreign experience in managing the housing stock, utilities, and also considers the main tariffs for utilities. Payment for utilities by the population is carried out on a monthly basis by transferring cash flows between various service providers from representatives of condominiums. Meanwhile, payment for utilities in various CSCs is carried out at different rates. This article also considers domestic experience in cost optimization in the management of an apartment building, which helped to identify various problem areas that require research, this explains the relevance of the topic of this article. In addition, practical approaches and procedures have been developed to optimize the costly part of housing and communal services management in high-rise buildings. Also, the study evaluates the cost model for managing an apartment building, which relies on certain services provided by a cooperative of owners. At the same time, based on the analysis, the optimal amount is determined for the effective functioning of the management company.
Heat loss effect on bitumen ageing in tanks
Authors: Saenko Sergey , Chernov Sergey , Zakharov Anton
Published: August 2023

The article is devoted to laboratory research on the influence of convective motion as a result of thermal losses and their compensation in tanks on the physical and chemical ageing of bitumen BND 60/90 and BND 90/130. Laboratory tests of bitumen samples confirmed the hypothesis about the key role of free movement of bitumen in tanks on its degradation under conditions of maintaining operating temperatures and free air access. Thus, bitumen degradation has a functional relationship with thermal losses from the tank surface and the total energy input for bitumen heating.