bluuebunny/crossref_metadata_2025_split huggingface dataset:
A 3D-printed fence-surface plasma source for skin treatment and its potential for personalized medical application
Authors: Zhao Yajun , Liu Yuzhuang , Liu Zhiyan , Zhang Xu , Zhang Li , Jin Shanshan , Fang Zhi 
Published: December 2023

Abstract
A 3D-printed fence-surface electrode that has the potential for personalized medical application is fabricated in this study. The framework of the 3D-printed fence electrode could be any shape to fit the outline of the target. Here, the fence electrode with an area of 50 × 50 mm is made as an example to study the discharge characteristic and the affecting factors (number of bars and the curvature of the electrode). The results show that more bars of the fence electrode with the same area will have a larger discharge current and a more uniform glowing area, which is consistent with the numerical results. When introducing the human load, it will not affect the original discharge between the fence and the ground electrodes but will add discharging channels between the fence electrode and the human load when the load contacts the fence electrode. In the worst case, the maximum root-mean-square of the discharge current flowing through the human model is 5.9 mA, which is still lower than the safety thresholds. The highest temperature rise on the surface of the fence electrode is 35.226.55 °C at the condition of 15 bars for 7 kV, 3 min running. It needs a 60 s treatment for Escherichia coli and Staphylococcus aureus to get a sterilization rate of 99.99% while it needs about 180 s treatment for Pseudomonas aeruginosa to get the same rate. Finally, the procedure for designing a personalized fence-surface plasma source is illustrated and the electrodes used to fit the calf and heel are made. The discharge of the personalized fence-electrode is stable and could be used in personalized plasma medicine in the future.
Fate of false vacuum in non-perturbative regimes
Authors: Frasca Marco , Ghoshal Anish , Okada Nobuchika 
Published: December 2023

Abstract
We use some exact results in scalar field theory to revise the analysis by Coleman and Callan about false vacuum decay and propose a simple non-perturbative formalism. We introduce an exact Green’s function which incorporates non-perturbative corrections in the strong coupling regimes of the theory. The solution of the scalar field theory involves the Jacobi elliptical function and has been used to calculate the effective potential for any arbitrary coupling values. We demonstrate the use of this formalism in a simple λ
ϕ
4 theory, and show that the effective potential exhibits a false minimum at the origin. We then calculate the false vacuum decay rate in the thin wall approximation, and suggest simple analytic formulae that may be useful for the analysis for the first-order phase transition beyond the perturbative regime. In our methodology, we show that the standard results obtained in perturbation theory are reproduced by making the coupling values very small.
First-principles and machine learning investigation on A4BX6 halide perovskites
Authors: Zheng Pan , Huang Yiru , Zhang Lei 
Published: December 2023

Abstract
The A4BX6 molecular halide perovskites have received attention owing to their interesting optoelectronic properties at the molecular scale; however, a comprehensive dataset of their atomic structures and electronic properties and associated data-driven investigation are still unavailable now, which makes it difficult for inverse materials design for semiconductor applications (e.g. wide band gap semiconductor). In this manuscript, we employ data-driven methods to predict band gaps of A4BX6 molecular halide perovskites via machine learning. A large virtual design database including 246 904 A4BX6 perovskite samples is predicted via machine learning, based on the model trained using 2740 first-principles results of A4BX6 molecular halide perovskites. In addition, symbolic regression-based machine learning is employed to identify more physically intuitive descriptors based on the starting first-principles dataset of A4BX6 molecular halide perovskites. In addition, different ranking methods are employed to offer a comprehensive feature importance analysis for the halide perovskite materials. This study highlights the efficacy of machine learning-assisted compositional design of A4BX6 perovskites, and the multi-dimensional database established here is valuable for future experimental validation toward perovskite-based wide band gap semiconductor materials.
Analysis of a sand and dust storm event in Termez, Surkhandarya Region, Uzbekistan: impacts and insights
Authors: Khamidjonov S K , Doniyorova X S 
Published: December 2023

Abstract
Sand and dust storms (SDS) are classified as global natural disasters and cause significant environmental and social problems. The article presents a study of a sand and dust storm that occurred on June 9, 2023, in Termez, Surkhandarya region, Uzbekistan. The research employed a multi-faceted approach, utilizing Landsat satellite imagery, and ground truth data collected through EKOLAB equipment. Additionally, a survey was conducted among the residents of the affected area to gather insights into the social impacts of the SDS event, and recommendations were developed by the authors to mitigate its consequences. The study aims to provide a holistic understanding of SDS occurrence in the region and its effects on the local population.
Geospatial model of negative processes of agricultural land as a means of digitalization of the educational and experimental farm
Authors: Esaulko A N , Odintsov S V , Loshakov A V , Ivannikov D I , Kotova A S 
Published: December 2023

AbstractThe article discusses the creation of a series of maps of negative processes for the purpose of digitalization of the Educational and Experimental Farm of the Stavropol State Agrarian University when assessing the degree of degradation of agricultural lands. The article is devoted to the problem of studying modern methods for assessing the condition of agricultural lands subject to negative processes. As a result of the research, the main negative processes were established, the degrees of their development and the intensity of their spread were determined. The main task of creating a geospatial model is to determine the current state of agricultural land and the possibility of their further use in agriculture. As a result, the prospects for the economic use of agricultural land were determined based on a comprehensive assessment of the qualitative condition of the land, a geospatial model will identify the dangers of the development of negative processes and a system of practical recommendations for planning the economic use of agricultural land.
Physical and geographical features of the toponyms of Uzbekistan
Authors: Mirakmalov M T , Ibragimova R A , Avezov M M , Okhunjonova D K 
Published: December 2023

Abstract
This article focuses on the study of physical and geographical aspects of toponymy, which involves the naming and renaming of geographical objects based on the natural features of a place. The research in this field prioritizes the normalization and standardization of geographical names, compilation of a state register of geographical names, proper use of names, publication of toponymic dictionaries, and transliteration of geographical names. In this regard, the present paper analyzes scientific research on toponyms from various regions worldwide, including Uzbekistan. A classification system of geographical names and physical and geographical features of toponyms specific to the regions of Uzbekistan has been developed and recommended, taking into account the natural characteristics of the place. Additionally, thematic toponymic maps have been developed.
Current state of biodiversity and hydrological-hydrochemical regime of the Mezhdurechensk reservoir of the Republic of Karakalpakstan
Authors: Temirbekov R , Mirzambetov N , Musaev A , Israilova I , Kaipov I , Turlibaev Z 
Published: December 2023

Abstract
The paper is devoted to the quantitative and qualitative indicators of the zooplankton of the Mezhdurechensky reservoir. The hydrological and hydrochemical regime of the Mezhdurechensky reservoir, which is highly dynamic and completely depends on the volume of river flow, has been studied. The species composition of the fish population of the Mezhdurechensk reservoir is given.
Influence of the shape of the disc slots of the seeder on the suction force of the vacuum for precise sowing of seeds
Authors: Saidova Mukhayyokhon , Alimova Feruza , Tursunbaev Sarvar , Kulmuradov Dilshod , Boltaeva Mohichekhra 
Published: December 2023

AbstractThe article analyzes the influence of the shape of the disc slots of the seeder on the suction force of the vacuum.Currently, pneumatic devices for various soil and climatic conditions are accurate with a cellular method of sowing seeds and the development of a seed drill design, in which 3 seeds are sown in each nest, targeted scientific research is being conducted to substantiate the parameters, ensuring its functioning at the level of agrotechnical requirements.In order to study the influence of the shape of the nests of the lander disk on the vacuum suction force, experimental studies were conducted using the lander disk of three different variants. Based on the conducted experiments, the authors drew their conclusions.
Assessment of sustainable innovative development of petroleum and gas chemical complex enterprises considering the impact of industrial risks
Authors: Zotov Maksim 
Published: December 2023

Abstract
This study assesses the state of the petrochemical complex sustainable innovative development considering the influence of industrial risks. It is assumed that the comprehensive introduction of innovations with various types of effects in the long term will improve not only the economic indicators of the region, but also the social and environmental ones through the introduction of sustainable innovations. It should be also noted that within the framework of existing world and domestic practice, issues with the integration of indicators for the safe and accident-free operation of enterprises of the petrochemical complex remain poorly studied. The work investigates the main economic, social, and environmental indicators of the complex under consideration. An analysis of accident rates at enterprises was carried out. The main causes of emergency events have been identified and measures to reduce them have been proposed. As a result it is concluded that the development of the petrochemical complex in the long term should be safe and based on the introduction of sustainable innovations.
Interrelation of wear rates of accelerator gear teeth
Authors: Irgashev B A , Mirzaev N N , Irgashev A 
Published: December 2023

Abstract
This paper considers the interrelation of wear rate of the accelerating gear pinion head and teeth foot, which depends on the number of pinion teeth involved in the meshing and gear ratio. Patterns of wear rate changes occurring between the head and the gear teeth leg, hardened by volume hardening, hardening by high-frequency current, cementation and nitriding, in the presence and absence of abrasive particles in the working environment, when the gear ratio has an increasing (accelerating) tendency, have been established.
The influence of the front section teeth lengths on the agrotechnical and energy performance of a two-stage vibratory gear hardware for land
Authors: Umurzakov A X , Imomov M X , Maxmudov F R , Mamasoliyeva S X 
Published: December 2023

Abstract
This article presents the research tests of agrotechnical and energetic performance based on the development of the construction of the oscillating gear harrow, which is processed in two stages before planting, and the results of the field test of its front section tooth lengths. In addition, the uniformity of the compression spring installed in the unit, their change graphs at different tooth lengths are given.
Productivity analysis of agricultural UAVs by field crop spraying
Authors: Kovalev I V , Kovalev D I , Astanakulov K D , Podoplelova V A , Borovinsky D V , Shaporova Z E 
Published: December 2023

AbstractThe article presents an analysis of the performance of agricultural UAVs when spraying field crops. Based on an analysis of the current state of technology for using UAVs in precision agriculture, a model for calculating UAV performance has been developed, based on the time structure of the crop spraying process, including the time of spraying, replenishment of mineral fertilizers or pesticides, and UAV flight. It is noted that for an agricultural UAV, when used in a precision farming system, the equation of existence must relate the take-off mass, the functional components of the take-off mass and the parameters of the sprayer, ensuring differentiated application of pesticides and fertilizers. Based on the proposed performance model of agricultural UAVs, recommendations are given for choosing the type of UAV for spraying crops. This model allows us to generalize methods for testing the production performance of agricultural UAVs, build models of production efficiency and provide proposals for technological solutions to improve these performance characteristics.
Results of extensive tests of a hanging brush grade equipped with track softeners and field soft devices
Authors: Tukhtakuziev A , Rasuljonov A R , Barlibaev Sh N , Kimsanov Sh 
Published: December 2023

AbstractThe article presents the structure, technological work process, values of basic parameters, technical description, and results of field tests of a comprehensive suspended screed-leveler equipped with devices that can quickly and easily adjust the pressure on the soil and create a soft soil layer on the surface of the field. According to the results of the tests, the working depth of the trail softener was 19.6 cm and 19.3 cm. At speeds of 6-8 km/h, the performance of a comprehensive roller-leveler equipped with track softeners and a device that creates a soft soil layer on the surface of the field is 4.96-6.24 ha/h in the main time, the performance in the operational time is 3, 77-4.74 ha/h, fuel consumption was 4.0-4.4 kg/ha. These remarks confirm that the pilot copy of the comprehensive roller-leveller, equipped with track softeners and a device that creates a soft soil layer on the field surface, performed the specified technological process reliably and qualitatively, and its performance fully corresponds to the initial requirements.
Analysis of system parameters in a microprocessor performance model of a swarm of agricultural spraying UAVs
Authors: Kovalev I V , Kovalev D I , Astanakulov K D , Voroshilova A A , Podoplelova V A , Borovinsky D V 
Published: December 2023

Abstract
The article develops a method for analyzing system parameters in a microprocessor performance model of a swarm of agricultural spraying UAVs. It is shown that the use of models for assessing the efficiency of UAV operation at various stages of the life cycle is possible on the basis of unified approaches to constructing a network model of UAV transport and technological cycles. The microprocessor performance model proposed by the authors provides a search for optimal solutions based on engineering programming approaches. Analysis of the influence of system parameters on the main criterion that determines the microprocessor performance of the system is performed based on a number of assumptions regarding the correspondence of predicted and actual parameter values. The main directions in modeling the microprocessor performance of UAVs are identified, for which sensitivity analysis of system parameters is the most important.
Calculation of the deformation values of the ammortizer in the compound angle gear transmission
Authors: Djuraev A Dj , Abduvakhobov D A , Khabibullaev D H , Ulmasov S A 
Published: December 2023

Abstract
The article presents the method of calculating the axial deformations of the rubber bush used in the bevel gear with the recommended composition and the formulas for determining the axial deformations. Based on the analysis of the connection graphs, the recommended values of its parameters were determined. The article presents the results of an analysis of the design features and disadvantages of cylindrical gears. An effective design scheme for a helical cylindrical gear transmission with elastic elements has been developed, allowing it to absorb peak values of oscillations of torques and axial force components arising from the meshing of wheel teeth, as well as cycling noise indicators.
Ecological characteristics of algoflora of Lake Khadicha and monitoring water quality
Authors: Kobulova B B , Yazdonov U T , Aitbayeva K K , Tashpulatov Y Sh 
Published: December 2023

Abstract
Lake Khadicha is a unique natural body of water which is used for growing commercial fish. In recent years, due to heavy loads of abiotic and anthropogenic factors, the lake water has become highly saline. This phenomenon greatly affects the biodiversity of aquatic organisms, in addition to algae. During 2019-2021, the algae flora of Lake Khadicha was studied. 216 species of algae were identified as part of the algal flora. Their relationship with external factors such as water temperature, salinity, pH and organic matter was studied.
Influence of supported filtration on channel safety (based on the example of Swanley channel)
Authors: Ikramova M , Akhmedkhodjaeva I , Otakhonov M , Ishpulatov Z 
Published: December 2023

Abstract
The article examines the problem of destruction and deformation of the banks of the Swanley Canal under the influence of backed-up groundwater filtration. An analysis of the current state of the canal and the dynamics of changes in groundwater levels along the canal bed was carried out. A hydraulic calculation of filtration flow was carried out and a method was proposed to reduce the negative impact of groundwater levels on the integrity of the canal.
Contact allergies to dental materials in patients
Authors: Forkel Susann , Schubert Steffen , Corvin Lisa , Heine Guido , Lang Claudia C V , Oppel Eva , Pföhler Claudia , Treudler Regina , Bauer Andrea , Sulk Mathias , Kränke Birger , Schäkel Knut , Heratizadeh Annice , Worm Margitta , Witte Jana , Geier Johannes , Buhl Timo 
Published: December 2023

Abstract

Background
Concerns regarding contact allergies and intolerance reactions to dental materials are widespread among patients. Development of novel dental materials and less frequent amalgam use may alter sensitization profiles in patients with possible contact allergy.

Objectives
To analyse current sensitization patterns to dental materials in patients with suspected contact allergy.

Methods
This retrospective, multicentre analysis from the Information Network of Departments of Dermatology (IVDK) selected participants from 169 834 people tested in 2005–2019 and registered with (i) an affected area of ‘mouth’ (and ‘lips’/‘perioral’), (ii) with the dental material in question belonging to one of three groups (dental filling materials, oral implants or dentures or equivalents) and (iii) with patch-testing done in parallel with the German baseline series, (dental) metal series and dental technician series.

Results
A total of 2730 of 169 834 tested patients met the inclusion criteria. The patients were predominantly women (81.2%) aged ≥ 40 years (92.8%). The sensitization rates with confirmed allergic contact stomatitis in women (n = 444) were highest for metals (nickel 28.6%, palladium 21.4%, amalgam 10.9%), (meth)acrylates [2-hydroxyethyl methacrylate (HEMA) 4.8%] and the substances propolis (6.8%) and ‘balsam of Peru’ (11.4%). The most relevant acrylates were HEMA, 2-hydroxypropyl methacrylate, methyl methacrylate, ethylene glycol dimethacrylate and pentaerythritol triacrylate. Few men were diagnosed with allergic contact stomatitis (n = 68); sensitization rates in men were highest for propolis (14.9%) and amalgam (13.6%).

Conclusions
Allergic contact stomatitis to dental materials is rare. Patch testing should not only focus on metals such as nickel, palladium, amalgam and gold, but also (meth)acrylates and the natural substances propolis and ‘balsam of Peru’.
Variations in older people’s emergency care use by social care setting: a systematic review of international evidence
Authors: Brotherhood Kelly , Searle Ben , Spiers Gemma Frances , Caiado Camila , Hanratty Barbara 
Published: December 2023

Abstract

Background
Older adults’ use of social care and their healthcare utilization are closely related. Residents of care homes access emergency care more often than the wider older population; however, less is known about emergency care use across other social care settings.

Sources of data
A systematic review was conducted, searching six electronic databases between January 2012 and February 2022.

Areas of agreement
Older people access emergency care from a variety of community settings.

Areas of controversy
Differences in study design contributed to high variation observed between studies.

Growing points
Although data were limited, findings suggest that emergency hospital attendance is lowest from nursing homes and highest from assisted living facilities, whilst emergency admissions varied little by social care setting.

Areas timely for developing research
There is a paucity of published research on emergency hospital use from social care settings, particularly home care and assisted living facilities. More attention is needed on this area, with standardized definitions to enable comparisons between studies.
Hemodynamic and electrophysiological responses of the human amygdala during face imitation—a study using functional MRI and intracranial EEG
Authors: Iidaka Tetsuya , Maesawa Satoshi , Kanayama Noriaki , Miyakoshi Makoto , Ishizaki Tomotaka , Saito Ryuta 
Published: December 2023

Abstract
The involvement of the human amygdala in facial mimicry remains a matter of debate. We investigated neural activity in the human amygdala during a task in which an imitation task was separated in time from an observation task involving facial expressions. Neural activity in the amygdala was measured using functional magnetic resonance imaging in 18 healthy individuals and using intracranial electroencephalogram in six medically refractory patients with epilepsy. The results of functional magnetic resonance imaging experiment showed that mimicry of negative and positive expressions activated the amygdala more than mimicry of non-emotional facial movements. In intracranial electroencephalogram experiment and time-frequency analysis, emotion-related activity of the amygdala during mimicry was observed as a significant neural oscillation in the high gamma band range. Furthermore, spectral event analysis of individual trial intracranial electroencephalogram data revealed that sustained oscillation of gamma band activity originated from an increased number and longer duration of neural events in the amygdala. Based on these findings, we conclude that during facial mimicry, visual information of expressions and feedback from facial movements are combined in the amygdalar nuclei. Considering the time difference of information approaching the amygdala, responses to facial movements are likely to modulate rather than initiate affective processing in human participants.