bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research of fault-tolerant control system of the formation process of carbon products
Authors: Zhuchenko Liudmyla 
Published: July 2022

The production of carbon products is largely resource- and energy-intensive. That is why increasing the efficiency of this production is an urgent scientific and practical task, especially in modern conditions of constant growth of energy costs. An effective way to solve this problem is to create a modern process control system, taking into account the possible failures of system elements.
The practice of operating hydraulic presses in carbon graphite production, the control valve of the hydraulic press sometimes fails or works with errors. That is why this paper considers the stage of loading the process of forming carbon products in terms of building a fault-tolerant pressing speed control system.
The article investigates the fault-tolerant control system of carbon products, which is synthesized on the basis of traditional fault-tolerant systems for non-cyclic processes and control systems with iterative learning, which have demonstrated their effectiveness in control technological processes of cyclical nature. A method using linear matrix inequalities has been developed for optimal adjustment of control system parameters.
Based on the combination of control with iterative learning and control that takes into account the failures of regulators, built a control system for the formation of carbon products, which takes into account both the cyclical nature of the technological process and possible failures of regulators. The research of the effectiveness of the control system by comparing its work with traditional fault-tolerant systems and control systems with iterative learning in the event of faults and disturbances of various kinds showed that the proposed system improves control quality not only over time during each cycle, but also from cycle to cycle.
Further research should be aimed at the practical application of the proposed control system for different technological processes in different types of failures of regulatory bodies and the action of disturbances of different nature.
RESEARCH OF OSCILLATIONS OF A TRACTOR DRIVING CLASS 3kN AND WAYS TO IMPROVE ITS RIDE SMOOTHNESS WITH REDUCING SPRING TENSION
Authors: Kalinin Evgeny , Filonenko Alevtyna , Koliesnik Yuliana , Petrov Ruslan 
Published: July 2022

In order to improve the smoothness of the course of the T-150K tractors, the possibilities of changing the main parameters of the suspension system and its influence on the intensity of low-frequency oscillations of the machine were considered. The stiffness and drag coefficient of the front suspension, as well as the base of the machine, were subjected to changes, and the range of variation was limited by the possibility of implementing the parameters without rearranging the units and changing the traction characteristics of the machine. As criteria for evaluating the smoothness of the ride, the values of the transfer function of the movements of various points of the frame, seat and root-mean-square accelerations during the movement of the tractor along natural irregularities were taken.
Based on the results of these studies, it was found that an increase in the tractor base by 10% has an insignificant and contradictory effect on the root-mean-square accelerations of the frame point over the rear axle over the entire range of design speeds from 2.5 to 7 m/s, and acceleration over the front axle and on the seat - up to a speed of 5 m/s. With a further increase in speed to 7 m/s (25 km/h), an increase in the tractor base by 10% reduces frame acceleration over the front axle by 15%, and on the seat by 20%. In addition, 11-leaf springs (when removing the 5th and 7th sheets), installed in the suspension with tractor hydraulic shock absorbers with optimal parameters, created on the basis of automobile shock absorbers of the MAZ-500E type, have smaller dynamic deflections during compression, than 13-leaf springs (suspension without hydraulic shock absorbers). According to this, the dynamic load on the 11-leaf spring, compared to the serial suspension, is reduced by 51% when the KhTZ-150K tractor is moving along a dirt road and by 30% when plowing the field across the furrows. Consequently, the stress on the sheets of an 11-leaf spring in the presence of shock absorbers in the tractor suspension will be less than that of a 13-leaf spring (without shock absorbers), which will ensure increased durability of the 11-leaf spring. In addition, the resource of the last spring should be increased by reducing the number of load cycles, since the suspension with these springs reduces the frequency of the tractor by 10% (according to experimental data).
O uso de imagens de satélite para identificar modificações das paisagens: o caso do lugar dos alunos do 6º ano da Escola de Ensino Fundamental Paquetá.
Authors: Mantovani João , Castro Cloves 
Published: July 2022

Este plano de aula tem como objetivo fazer análise da paisagem do local de vivência dos estudantes do sexto ano com o uso de geotecnologia, no caso o Google Earth, objetivando perceber as modificações ocorridas entre os anos de 2003 e 2021. O ensino de Geografia deve superar as metodologias tradicionais que focam na memorização e incluir metodologias que despertem a autonomia e o protagonismo. A abordagem do lugar do estudante o remete a ter um olhar espacial sua realidade, buscando ressignificar seu cotidiano. A Geografia, enquanto componente curricular e tendo como objeto de estudo o espaço geográfico, deve oportunizar aos estudantes o contato e uso das geotecnologias disponíveis para observações e reflexões sobre o uso da superfície terrestre. Conclui-se que o uso de geotecnologia para analisar as modificações temporais na paisagem demonstrou-se eficiente, contribuindo na compreensão dos fenômenos e novos aprendizados aos estudantes.
Seasonal Variations and Risk Assessment of Microplastics in the Riverine Sediments of the Western Ghats, A Heritage Site in Southern India
Authors: Amrutha Kaniyambadi , Shajikumar Sachin , Warrier Anish Kumar , Sebastian Joju George , Sali Yamuna Adichinalniravel , Chandran Thara , Sivadas Sanitha , Naik Ravidas , Amrish Vadakkeveedu Narayan , Kumar Arun , Unnikrishnan Vishnu 
Published: July 2022

Abstract
There is very little knowledge on microplastic pollution in the Western Ghats (WG), a heritage site in southwest India. To address this, we have studied the seasonal variations of sedimentary microplastics (MPs) from River Sharavathi - a pristine river in the WG, southern India. We analysed the sedimentological and carbon content (organic and inorganic) of these sediments and explored their relationship with MPs. Finally, risk assessment indices such as the Pollution Load Index (PLI), Polymer Hazard Index (PHI), and the Potential Ecological Risk Index (PERI) were calculated to detect the levels of plastic pollution. The concentration of MPs ranged from 2.5 to 57.5 pieces/kg and 0 to 15 pieces/kg during the pre-monsoon and post-monsoon seasons, respectively. The dip in the MPs abundance during the post-monsoon season was due to the extremely high rainfall in the river basin during July-August 2019, which would have entrained the sedimentary MPs and transported them to the coast/Arabian Sea. Smaller MPs (0.3-1 mm) were more abundant than the larger MPs (1–5 mm), mainly due to the breakdown of sedimentary plastics by physical processes. Fragments, films, foams and fibres were the main categories of MPs and the main polymers were: polyethylene > polyethylene terephthalate > polypropylene. No significant relationship was observed between the sedimentological properties and microplastics, which may be due to the different physical properties of sediments and microplastics. The PLI, PHI, and PERI indices suggest different contamination levels in the river basin, and the district administration can use the data to mitigate plastic pollution in heritage sites.
A biologically inspired approach for recovering the trajectory of off-line handwriting
Authors: Senatore Rosa , Santoro Adolfo , Parziale Antonio , Marcelli Angelo 
Published: July 2022

Abstract
Background: Reconstructing the trajectory from the static image of handwritten ink traces is useful in many practical applications envisaging handwriting analysis and recognition from off-line data, as it allows to use methods, algorithms and tools that deal with on-line data, achieving better results than those achieved on off-line data.Methods: In this work we addressed the trajectory recovery by proposing an approach inspired by the processes involved in human learning of motor skills to perform voluntary and complex movements. As humans learn motor skills by a trial-and-error process driven by the performance and the consumption of metabolic energy, our approach generates a trajectory and estimates the consumption of metabolic energy needed to execute it, and in case it is deemed too energy demanding, a new one is generated and its energy consumption is evaluated. Eventually the one corresponding to the minimum energy consumption among the extant ones is selected as the actual one. Results and Conclusions: The effectiveness of the proposed approach has been quantitatively and extensively evaluated on a large and publicly available dataset, containing multi-stroke words. The experimental results show that our approach outperforms the existing ones in terms of Root Mean Square Error and Dynamic Time Warping distance between the recovered trajectories and the actual ones. Furthermore, an on-line recognition system provided with the trajectory recovered from off-line samples showed an overall reduction of about 1% with respect to the recognition rate achieved by the system when provided with on-line data.
Chirped laser beat wave electron acceleration in vacuum
Authors: Middha Kavish , Thakur Vishal , Kant Niti , Rajput Jyoti 
Published: July 2022

Abstract
Electron acceleration due to the beating of two linearly polarized lasers of finite spot size at an arbitrary angle in a vacuum has been investigated. The interference at certain angles due to these lasers with slightly different frequencies interacting at any arbitrary angle has been studied. Due to the constructive interference between these lasers, their resultant electric and magnetic field points out in a particular direction, where the electron is injected for effective trapping and noticeable acceleration has been observed. Sensitiveness of chirp parameters on electron acceleration have been observed. Along with this, a periodic frequency chirp plays a crucial role in the improved acceleration of electron. In this way, electron energy is enhanced more conveniently.
Study on the Relationship Between the Contact Stiffness of Micro-Convex Body over the Full Contact Domain and the Macroscopic Interference Value
Authors: Jin Lan , Li Weibing , rui Zhiyuan , Zhao Guoxing 
Published: July 2022

Abstract
This paper proposes a rough surface micro-contact method to investigate the contact characteristics of the interface between the outer surface of in machine tool main spindle and the interference connection of the inner ring surface of a bearing. Based on the measured data of real rough surface, a contact model between the single micro-convex body and the rigid surface is established, and the variation rules of the micro-convex deformation and the normal contact stiffness on the whole contact interface are analyzed in the stages of elastic deformation, elastic-plastic deformation and full-plastic deformation. The relationship between the contact stiffness of the micro-convex body and the macro-overrun of the interface between the spindle rough elastic surface and the bearing rigid inner ring surface interference connection is modeled by the mathematical relationship between the macro-overrun and the separation distance between these surfaces. It is found that, throughout the contact process, different ranges the interference amount can cause different forms of deformation of the micro-convex body at the contact interface, and the contact stiffness grows nonlinearly with the increase of interference amount. Finally, the finite element results are used to verify that the contact stress between the rough surface micro-convex body and the rigid smooth surface on the unit contact area shows a nonlinear increase as the interference gradually rises, which indirectly proves the correctness of the derived model describing the relationship between the contact stiffness of the micro-convex body and the macroscopic interference the full contact domain , and provides theoretical support for the rational selection of assembly design parameters at multiple scales.
Digital Mindfulness Trainings and Cognitive Functions – A preregistered systematic review of neuropsychological findings
Authors: Liebherr Magnus , Brandtner Annika , Brand Matthias , Tang Yi-Yuan 
Published: July 2022

Abstract
Traditional mindfulness interventions have been frequently reported to be effective in improving cognitive functions. In recent years, however, traditional programs are increasingly replaced by technology-enabled mindfulness interventions. The aim of the present systematic review (PROSPERO ID: CRD42021289480) was to evaluate the research evidence on their effects on cognitive functions. Empirical intervention studies in the realm of digital mindfulness trainings fulfilled the inclusion criteria, which led to 19 studies and 1,257 participants being included in this review among PubMed, Scopus, and Web of Knowledge. Results support previous assumptions on the potential of digital mindfulness trainings with the most robust effect on attention control, followed by executive regulation and memory, cognitive flexibility, and other cognitive functions. However, the number of studies that did not find significant changes at least equaled, if not exceeded, the number of studies that found increases. The heterogeneity of identified studies prompted us to discuss several aspects in order to help future development of digital applications.
Seasonality and weather condition’s effect on human perception of the urban-rural transitional landscape
Authors: Półrolniczak Marek , Kolendowicz Leszek 
Published: July 2022

Abstract
Landscape perception research into the impact of seasonally changing landscape characteristics with the simultaneous influence of the weather are rare. Therefore, eye-tracking metrics were calculated (fixation and saccades) for the whole tested landscape, while its areas of interest (AOIs) were established based on clustering methods. Moreover, the gaze pattern was analysed using the Voronoi cells method. To identify significant differences in landscape perception according to various weather and seasonality, nonparametric tests were applied. The significant influence of weather/seasonality and their synergistic influence is noticed. The results indicate a rather complex influence of the types of weather in warmer and cooler seasons. Regardless of the weather type, seasonal changes cause greater visual span and shorter fixations in the warmer season. The fixations and saccades are shorter in the warmer season in two AOI’s during positive weather, but are longer in negative weather during the colder season in most AOI’s. The main reasons for the influence of weather and seasonality on the visual perception include seasonal changes in the landscape, resulting in the appearance of the landscape from more urban to natural and vice versa (phenological changes) as well as lighting changes (due to seasonality and type of weather).
Unit Root Tests of Airline’s Stock Returns Considering Alliances
Authors: ölçen olcay 
Published: July 2022

Abstract
This paper, it is aimed to make a unit root analysis of the stock return time series of 20 air carrier’s companies due to alliance membership. Five important unit root tests, which can be classified as Fourier or linear, have been utilized. Although there are some meaningful results on an individual basis, there is not any meaningful result considering alliances. The conclusions were made.
Ecofriendly pretreatment of cotton knit fabrics by ultrasonic irradiation and reusing bath chemicals
Authors: Hoque Mohammad M. U. , Rimu Sunzida H. , Mallik Abul K. , Rahman Mohammed Mizanur 
Published: July 2022

Abstract
Bangladesh's cotton knit industries contribute significantly to the country's economy, accounting for more than 40% of total annual export. Efficient water use in knit dyeing might result in considerable water savings and environmental sustainability. Textile wet processing consumes a lot of energy (water, gas, and electricity), generates a lot of waste, and has significant chemical costs. The cotton knit fabric used in this study was pretreated and dyed utilizing ultrasonication at a lower temperature than conventional pretreatment and dyeing techniques in an attempt to establish ecofriendly wet processing in the textile industry. For pretreatment and dyeing, bath chemicals were reused 1–3 times, and several fabric attributes including whiteness index, weight loss (%), bursting strength, color fastness to light, washing, perspiration, and rubbing were tested and compared to the traditional method. By dying with reactive dyes, the feasibility of color matching using ultrasonic aided pretreated fabric with and without reusing bath chemicals was determined. The whiteness index of the low temperature sonicated scoured and bleached fabric was found to be acceptable, with relatively low weight loss; nevertheless, the bursting strength was found to be enhanced. Color fastness to light, washing, perspiration, and rubbing of ultrasonicated dyed knitted fabric at lower temperatures than conventional techniques were found to be comparable, showing that there was no color deterioration during ultrasonication. FT-IR spectroscopy and scanning electron microscopy (SEM) revealed no significant changes in the chemical composition of cellulose or the fabric shape of pretreated and dyed cotton knit fabric after ultrasonication.
Contribution of hydrological connectivity in maintaining aquatic plant communities in remnant floodplain ponds in agricultural landscapes.
Authors: Nagata Yu , Ishiyama Nobuo , Nakamura Futoshi , Shibata Hideaki , Fukuzawa Karibu , Morimoto Junko 
Published: July 2022

Abstract
The expansion of the agricultural landscape in recent times has led to the fragmentation of floodplains. In this context, remnant floodplain ponds serve as important habitats for aquatic plants. Hydrological connectivity between floodplain ponds, facilitated by artificial watercourses, plays an important role in providing a migration course for mobile animals, such as fish. However, little is known about the contribution of artificial watercourses to the dispersal of aquatic plants, which are passive dispersers, between floodplain ponds. This study aimed to elucidate the effects of hydrological connectivity through artificial watercourses and environmental factors on the structure and composition of aquatic plant communities in lowland floodplain ponds. Vegetation and environmental surveys of 20 floodplain ponds were conducted in the agricultural landscape of northern Japan. Structural equation modeling (SEM) was used to clarify the effects of local- and landscape-scale environmental variables on aquatic plant communities with respect to species richness and species coverage. We found that hydrological connectivity between floodplain ponds was a determinant of the species richness of aquatic plant communities; however, its effect was weaker than that of eutrophication. The study findings indicate that water quality management, connectivity conservation, and restoration should be prioritized to maintain aquatic plant communities in degraded floodplain ponds.
Prevalence and characteristics of musculoskeletal complaints: an analysis from the POpulation Level and Analysis Reporting (POLAR) database
Authors: Haas Romi , Gorelik Alexandra , Busija Ljoudmila , O'Connor Denise , Pearce Christopher , Mazza Danielle , Buchbinder Rachelle 
Published: July 2022

Abstract
BackgroundElectronic health record datasets have been used to determine the prevalence of musculoskeletal complaints in general practice but not to examine the associated characteristics and healthcare utilisation at the primary care level.AimTo describe the prevalence and characteristics of patients presenting to general practice with musculoskeletal complaints.Design and SettingA five-year analysis within three Primary Health Networks (PHNs) in Victoria, Australia. MethodWe included patients with at least one face-to-face consultation 2014 to 2018 inclusive and a low back (≥18 years), and/or neck, shoulder or knee (≥45 years) complaint determined by SNOMED codes derived from diagnostic text within the medical record. We determined prevalence, socio-demographic characteristics and diagnostic codes for patients with an eligible diagnosis; and number of consultations within one year of diagnosis.Results324,793/1,294,021 (25%) presented with at least one musculoskeletal diagnosis, of whom 41% (n=133,279) fulfilled our inclusion criteria. There were slightly more females (n=73,428, 55%), two-thirds (n=88,043) were of working age (18-65 years) and 83,816 (63%) had at least one comorbidity. Over half had a low back diagnosis (n=76,504, 57%) followed by knee (n=33,438, 25%), shoulder (n=26,335, 20%) and neck (n=14,492, 11%). Most codes included ‘pain’ and/or ‘ache’ (low back: 58%, neck: 41%, shoulder: 32%, knee 26%). Median (IQR) all-cause consultations per patient within one year of diagnosis was 7 (4-12). ConclusionThe burden of MSK complaints at the primary care level is high as evidenced by the prevalence of people with musculoskeletal complaints presenting to a general practitioner, the preponderance of comorbidities and the numerous consultations per year. Identification and evaluation of strategies to reduce this burden are needed.
Analysis of the “circular plastics economy” phenomena and its long-term implications for demand for petroleum market
Authors: Kapustin Nikita , Grushevenko Dmitry 
Published: July 2022

Abstract
In recent years, the problems of polymer pollution and carbon footprint have stirred up an active debate around the future of the plastic industry, which over the past 50 years has been a significant driver of global oil demand. It is assumed that the transition to a "circular plastic economy" should resolve environmental issues for the industry, but so far neither at the state level nor in the business and expert environment there is a common understanding of this concept or its implementation. In this work the authors attempted to untangle the discussion around the “circularity of plastics” and assess the current state and prospects of the impact of this phenomenon on the market of liquid hydrocarbons. Even in the Moderate scenario of the calculations, the "circular plastics economy" does become an important factor in demand for hydrocarbons in plastics industry, reducing it by 5–10% of the Buisiness-as-Usual case by 2050 and greatly slowing down demand growth rates after 2045, and the more drastic scenario even sees hydrocarbon demand peak by 2040. These findings indicate the importance of taking into account the "circularity" when making long-term forecasts of global oil market.