bluuebunny/crossref_metadata_2025_split huggingface dataset:
INDICATORS OF INFORMATION FEATURES FOR RECOGNISING THE STATE OF SOURCES AND OBJECTS OF TELECOMMUNICATION NETWORKS AND SYSTEMS
Authors: Ilnytskyi Аnatolii , Oleg Tsukanov 
Published: December 2023

Background. The majority of modern procedures for the recognition of radio sources and objects are based on the use of binary and multivalued logic, which have low specific features. The essence of the issues is to compare a priori knowledge and a posteriori data coming from the surveillance means and to make a decision on the recognition of a radio emission object. A priori knowledge and a posteriori data are formed both before and during the recognition process on the basis of sets of information features or information signatures. At the same time, when constructing an integral indicator for determining the affiliation and status of sources and objects, it is necessary to know the weighting coefficients of information features, the determination of which is a rather difficult task. Therefore, the issue of determining the weighting coefficients that characterise information features remains an urgent task in the field of statistical radio engineering.
Objective. The purpose of the paper is to select and substantiate a simple and effective method for calculating the weighting coefficients of information features for the implementation of the methodology for recognising radio sources and objects.
Methods. Decision-making on the value of the weighting coefficients of information features of the recognition objects belonging to a certain class is based on the results of calculations using one of the three Fishburne formulae, which, in comparison with the known methods of expert assessments, are very simple and understandable, do not require any additional research and complex calculations.
Results. The procedure is proposed and an example of using the Fishburne method (three formulae) in calculating the value of the weighting coefficients of information features for recognising sources and objects of radio monitoring is considered.
Conclusions. Comparison of the method of calculating the weighting coefficients using Fishburne's formulae with other known methods of expert assessments shows that there is no need to interview experts and process their analysis results; there are no restrictive implementation conditions; it is easy to take into account additional information about the indicators, if necessary; no software implementation with a complex search algorithm is required; it is easy to make any changes as additional information indicators.
AUTOMATED WORKFLOWS FOR ASSESSING THE QUALITY OF FUNCTIONING OF SCIENTIFIC AND EDUCATIONAL INSTITUTIONS
Authors: Novogrudska Rina , Siemens Eduard , Pidnebesnyy Andrii , Shelest Yegor 
Published: December 2023

Background. The effectiveness of functioning is a particularly important characteristic for organizations involved in the field of science and education, since the future level of state development and the life of its citizens depends on the quality of the services they provide. There are certain generally accepted principles of such organizations evaluation that is set by relevant normative documents. Nowadays important tasks are optimization and automatization of such processes.
Objective. The aim of the paper is to propose and develop a workflow model for automating and optimizing the procedure for evaluating scientific and educational institutions.
Methods. We use approaches to business process modelling and basic principles of workflow modelling, namely BPMN notation was chosen as the notation to model elements of workflows for assessing the quality of scientific and educational institutions functioning, and Camunda Modeler was used as the development environment.
Results. Conceptual model of the work process for assessing the quality of scientific and educational institutions functioning was proposed, which made it possible to generalize and formalize such an assessment process. Developed using BPMN models of workflow were used to test proposed conceptual model and prove its effectiveness for automating the process of assessing the quality of scientific and educational institutions functioning.
Conclusions. Mechanism of modelling the process of assessing the quality of scientific and educational institutions functioning proposed in the paper gave basis and means for such process optimization and automatization.
POSSIBILITIES OF IMPROVING THE VOICE SERVICES QUALITY IN 5G NETWORKS
Authors: Ivan Vetoshko , Kravchuk Serhii 
Published: December 2023

Background. The introduction of fifth-generation (5G) networks creates new opportunities for fast and continuous data exchange, but there are still some problems with the quality of voice services in such networks. With the rapid development of technology and the further spread of 5G, there is a need to understand the impact of key aspects of 5G on voice quality. This requires research that can systematically analyse the features of 5G networks that affect the quality of voice services.
Objective. Identification of ways to improve the quality of voice services in 5G networks. Assessment of key indicators of voice service quality in 5G networks. Determination of the best option for the gradual transition to the Standalone mode and the use of VoNR technology in the fifth generation networks.
Methods. Analysis of factors affecting the quality of voice services in fifth-generation networks. Analysis of well-known publications on the implementation of 5G networks. Comparison of the implementation of Non-Standalone and Standalone modes in the 5G network. Testing of the modern EVS codec, which provides an opportunity to improve the customer experience.
Results. Confirmation that 5G networks can significantly improve the quality of voice services compared to previous mobile communication technologies such as 4G and 3G. Certain factors that may affect the quality of voice services and require additional attention when planning and deploying 5G networks are identified. The optimal steps for the transition to the Standalone mode and the use of VoNR technology in fifth-generation networks are determined. The main differences in the QoS architecture between LTE and 5G are identified, and the purpose of DRB flows for separating traffic types and services is established.
Conclusions. It has been confirmed that 5G networks can significantly improve the quality of voice services compared to previous technologies such as 4G and 3G. This is possible due to the broadband capabilities of 5G networks, improved data transmission, low latency, the use of an advanced EVS codec and reduced response time. However, certain factors, such as network coverage, optimisation level and traffic characteristics, can affect the quality of voice services and require additional attention when planning and deploying 5G networks. The QoS management architecture consists of QoS flows, which allow separating packet assignment to flows (managed by the CN) from the assignment of DRB flows (managed by the RAN). As 5G networks are being rolled out gradually, it is important to properly integrate the 5G domain into the existing telecoms provider's network. The transition from Non-Standalone to Dual connectivity is a necessary step for the implementation of VoNR technology in Standalone mode. Using the modern EVS codec allows not only improving the customer experience, but also introducing new voice services.
Study of the modernized single-screw extruder body energy efficiency
Authors: Vytvytskyi Viktor , Vytvytskyi Vladyslav , Mikulionok Ihor , Sokolskyi Oleksandr , Shylovych Tetiana 
Published: December 2023

The subject of the study is the energy efficiency of the polymer extrusion process in a single-screw extruder for the polymer materials processing.
The purpose of the research is to improve the design of the feeding section of the single-screw extruder cylinder, which consists in placing thermal paste in the gap between the connecting cylindrical surfaces of the removable cylindrical sleeve and the channel of the feeding section cylinder, which reduces the thermal resistance of the section wall and improves heat transfer from the processed material to the cooling water, and therefore, it makes it possible to reduce its consumption.
To check the energy efficiency of the proposed technical solution, thermal calculation of the basic and modernized structures of the feeding section cylinder was performed in the Steady Thermal model of the Ansys program. Polyvinyl chloride brand SorVyl G 2171/9005 11/01 was chosen as a recyclable polymer, alloy steel as the material of the feeding section elements, and thermal paste with a thermal conductivity of 4 W/(m·K) as a filler for the annular space between the cylinder and the sleeve.
The analysis of the calculations showed that the use of thermal paste instead of air in the gap between the cylinder and the removable cylindrical sleeve reduces the thermal resistance of the cylinder wall by 9 %, while with the traditional method of assembling the extruder body, the temperature on the inner surface of the sleeve was 67.5 °C, and under the condition application of thermal paste – 61.5 °C. At the same time, the temperature field along the length of the feeding section of the cylinder is also equalized. In addition, it is worth noting that the type of thermal paste used has almost no effect on the thermal resistance of the section wall, so in the proposed design it is possible to use low-cost thermal paste (replacing the thermal paste with a thermal conductivity of 4 W/(m·K) with a more effective one with a thermal conductivity of 8.4 W/(m·K) reduced the temperature on the inner surface of the sleeve by only 1 K).
The proposed improvement of the feeding section of the cylinder of a single-screw extruder can be applied not only in the polymer processing industry, but also in the food and processing industries in the construction of screw machines for various purposes.
Reducing the thermal resistance of the cylinder section wall of the single-screw extruder ensures a reduction in the flow of cooling water circulating in the cylinder channel and equalizes the temperature field along the length of the feeding section of the cylinder, and therefore prevents premature melting of the polymer and ensures reliable generation of pressure in the working channel of the extruder.
Biochemical indicators used in ecological monitoring of surface waters
Authors: Vember Valeriia , Hlushko Olena , Lavrynenko Olena , Isniuk Sofiia 
Published: December 2023

The work is devoted to the search for promising test systems for ecological monitoring of surface waters by comparing the effectiveness of detecting low concentrations of various types of pesticides in the aquatic environment by traditional morphological and biochemical research methods.
Allium cepa L. and the hydatophyte plant Elodea canadensis Michx. were used as test objects because it is immersed in the aquatic environment during its entire life cycle and is in the most complete contact with all the toxicants present in the water.
It was found that the traditionally used test reactions of plants cannot always reflect a potentially dangerous exceedance of the MPC of toxicants in the aquatic environment.
The possibility of using catalase activity as a sensitive bioassay for the presence of low concentrations of herbicides with different mechanisms of action in the water environment was investigated.
Correlation analysis has been conducted, and Pearson's coefficients have been calculated to quantify the relationship between the concentration of herbicides present in water and the degree of manifestation of test reactions by the research objects.
The highest level of correlation between the increase in the concentration of herbicides in water and the test reactions of elodea was demonstrated by biochemical indicators, and the higher significance of the correlation was observed at 4-day exposure of plants in the presence of the herbicide.
Determination of the efficiency of oxygen removal from water from the ratio of the concentrations of sodium sulfite and the iron catalyst
Authors: Gomelya Mykola , Holiaka Andrii 
Published: December 2023

The main issue of corrosion activity is the removal of oxygen from water. Under certain conditions, inhibitors-passivators are effective. Other methods based on thermal and vacuum deaeration of water. These methods are energy-consuming and do not provide the necessary quality of water, so chemical reagents are used for deep deoxidation of water regardless of secondary pollution.
In this work, distilled water with a certain concentration of oxygen was placed in a hermetic container. The calculated amount of sodium sulfite solution (sodium metabisulfite) was added to the water and after certain intervals the oxygen concentration in the water was recorded using an oxygen meter, the sensor of which was placed in the container before. In another series of experiments, calculated amounts of sodium sulfite and iron sulfate solutions were added to the water, the container was quickly closed and the oxygen concentration in the water was recorded at certain intervals.
It has been shown that in distilled water at room temperature, sodium sulfite interacts very slowly with oxygen. In 1 hour, the rate of oxygen recovery increases from 27.7 % to 56.9 % when the sulfite concentration increases from 50 to 300 mg/dm3. It was established that iron (II) ions significantly accelerate the rate of oxygen reduction by sulfite already at an iron concentration of 0.1 mg/dm3 at a sulfite concentration of 50-300 mg/dm3. According to the integral kinetic curves of the 0th, 1st, 2nd, and 3rd orders, kinetic models of sulfite oxidation in distilled water with oxygen in the presence of iron ions were determined.
It is shown that when the concentration of sulfite increases to 200, 300 mg/dm3, with an iron concentration of 0.5‑1.0 mg/dm3, the oxidation processes follow first-order reactions and their speed is determined by the oxygen concentration. When the concentration of iron and sulfite is reduced, the realization of oxidation processes according to the reactions of the 2nd and 3rd orders was noted, when the speed of the process depends not only on the concentration of oxygen, but also on the concentration of sulfite (2nd order) and iron ions (3rd order) .
This work is aimed at solving the relevance of the problem of water deoxidation for water preparation in cooling systems. The direction of the research is very promising considering the satisfactory and effective results obtained and the inexpensive chemical reagents used. Further research will be aimed at finding ideal conditions for the reaction and finding optimal concentrations of reagents while ensuring maximum efficiency of the process, which in turn will bring mankind a solution to the problem of spending large amounts of money, chemical reagents and environmental pollution.
Photocatalytic destruction of organic dyes by titanium dioxide particles doped with gold
Authors: Lavrynenko Olena , Zahornyi Maksim , Vember Valeriia 
Published: December 2023

Nanocomposites based on titanium dioxide doped with gold in concentrations of 0.2 and 0.8 wt.% were obtained by the sol-gel method using titanium tetraisopropoxide and chlorauric acid. Thermal treatment of precipitates at T = 600 °C led to the formation of highly dispersed anatase powders and increasing the temperature to 1000-1200 °C contributed to the formation of well-crystallized rutile particles. The gold in the structure of the powders is heterogeneously distributed. The size of the primary particles of anatase did not exceed 10 nm, and that of rutile reached 35-46 nm, gradually increasing with increasing processing temperature. The photocatalytic properties of TiO2&Au structures were studied during the decolorization of solutions of organic dyes (Methylene Blue, Rhodamine B, Methyl Orange, Orange G) with a concentration of 20 mg/dm3. The resulting structures did not show significant sorption activity, and visible light caused a slight desorption of the dyes. At the same time, under the influence of UV irradiation for 60 minutes, the decolorization process took place effectively and was subject to a pseudo-first-order reaction. The biggest photocatalytic activity was shown by the sample of anatase with a gold content of 0.8 wt.%. When it was added into the solution, the degree of decolorization of Rhodamine B reached up to 50%, Methyl Orange - up to 81.5%, Methylene Blue - up to 91%, and Orange G - up to 95.2%. Increasing the efficiency of the destruction of dyes can be achieved by supplementing the photo-catalytic process with a catalytic one.

Аcknowledgements : Olena Lavrynenko is supported by the PAUSE program, a national emergency program for scientists and artists in exile, run by the Collège de France
Analisis Pola Harga Saham dengan Modifikasi Metode Eksponen Hurst dan Box Counting
Authors: Kosala Kosala Dwidja Purnomo , Irma Dwi Anggraeni  , Abduh Riski  
Published: December 2023

Pola harga saham merupakan interpretasi dari grafik harga saham dengan rentang waktu tertentu. Pola dinamika dari harga saham penting untuk diketahui karena sejatinya seorang investor melakukan investasi mengharapkan imbalan (return) tinggi dengan risiko rendah. Pola dinamika harga saham dapat diketahui melalui analisis dimensi fraktal karena grafik harga saham memiliki sifat self-affine yang merupakan salah satu sifat dari objek fraktal. Pada penelitian ini dimensi fraktal akan dianalisis menggunakan modifikasi metode eksponen Hurst dan box counting. Klasifikasi dari hasil perhitungan dibedakan atas tiga jenis berdasarkan sifatnya, yaitu random, persistent, dan anti-persistent. Terdapat dua interval data yang diamati yaitu harga saham dari Januari sampai Desember ( data) dan harga saham dari bulan Januari sampai Juni ( data). Nilai eksponen Hurst yang dihasilkan dari kedua interval secara berurutan yaitu dan . Berdasarkan nilai eksponen Hurst yang dihasilkan menunjukkan bahwa data bersifat anti-persistent karena nilai . Kemudian nilai dimensi fraktal yang diperoleh dari penerapan metode box counting yaitu dan yang artinya pola harga saham Bank Rakyat Indonesia bersifat anti-persistent. Pola data bersifat anti-persistent yang berarti pada bulan-bulan tertentu saham memiliki harga yang tinggi dan pada bulan-bulan berikutnya saham memiliki harga yang rendah untuk diperjualbelikan.
A deep learning-based technique for firm annotation and domain adaptation in land cover classification using time-series aerial images
Authors: Kalita Indrajit , Chakraborty Shounak , Reddy Talla Giridhara Ganesh , Roy Moumita 
Published: December 2023

Abstract

In this manuscript, a novel framework has been presented for firm annotation (classification) of a geographical area based on spatial as well as time-series analysis of multi-temporal very high resolution (VHR) satellite images. For this dual objective, an attention-based deep learning mechanism combined with the capabilities of convolutional-recurrent neural networks has been investigated for this purpose. The proposed annotation strategy is introduced as 'firm' since it allows the classifier to automatically ascertain the land-cover class by taking into consideration the geophysical changes on a landmass and thus outsmarting the conventional techniques relying on visual interpretation of a single image. The attention mechanism focuses on the important portions of the image scene while the convolutional long short-term memory neural networks exploit the temporal dependencies on the time-series image scenes. Moreover, an adaptive land cover classification scheme, considering the features extracted from the proposed classification approach has been explored for more robust time-series based firm annotation. To assess the performance of the proposed schemes, the experiments have been conducted on the two novels VHR multi-temporal land cover classification datasets. The investigated models have been shown to have the capacity to outperform the other state-of-the-art techniques under non-adaptive as well as adaptive scenarios using the multi-temporal images captured over disjoint geographical locations.
Unraveling the multidimensional impacts of the energy crisis on citizens’ judgment and decision-making
Authors: Frings Nina , Helm Jessica , Hahnel Ulf 
Published: December 2023

Abstract

The energy crisis has reshaped energy politics, resulting in energy price surges, increased energy capacity, and large-scale energy-saving campaigns. While an overall energy demand reduction has been observed in Europe, little is known about how the crisis has impacted citizens’ climate-relevant judgment and decision-making. We report a preregistered two-wave cross-national study (N=1040) spanning the winter of 2022/2023 to investigate how support for renewable energy (RE) policies, energy literacy, and energy-efficient product choices developed as this crisis unfolded. We couple longitudinal experimental data with real-world energy price data. This natural experiment indicates that energy-efficiency preferences were shaped by both, the salience of the crisis and real-world price signals. Changes in energy literacy were contingent on the numerical abilities of participants, suggesting that the crisis increased gaps in knowledge among different groups in society. Overall support for RE policies, and prioritization of key policy attributes, remained stable despite shifts in public attention and uncertainty.
GA4/ABA ratio and epigenetic modification cooperatively regulate maize seed vigor
Authors: Yang Wensi , Tian Longpeng , Chen Yanhong , Li Jieran , Zhang Huidi , Liu Xiyan , Zhang Chunqing , Li Yan 
Published: December 2023

Abstract
Seeds with the same genetic information from the different parts of the maize ear vary in seed vigor, with the highest at middle section, and the lowest at top position. However, little is known regarding the associated mechanisms. In the present study, we explain the mechanism of maize ear position effects on seed vigor on the term of epigenetic modification. Exogenous Flu-treatments on seeds (Flu is fluoridone, an inhibitor of ABA synthesis) at 10 days or 14 days after pollination changed expression level of ABA synthesis- and catabolism-related genes, and ultimately increased the GA4/ABA ratio of seeds and influenced seed color and seed vigor. The H3K9me2 level of seeds at middle section decreased more rapidly at 24 h of imbibition than that at top section. 37.5 μmol/L Flu and 75 μmol/L Flu treatments both significantly increased the level of H3K9me2 in seeds by improved expression of H3K9 methyltransferase genes, GRMZM2G300955 and GRMZM2G165011. This indicated that H3K9me2 regulates maize seed vigor. Genome-wide DNA methylation analysis of seeds at different positions showed big differences between that of top and middle sections. There are differences in DNA methylation of genes involved in glycerophospholipid metabolism, amino sugar and nucleotide sugar metabolism, arginine and proline metabolism and biosynthesis of nucleotide sugars in different parts of one maize ear seeds. The present study contributes to analysis of the mechanisms underlying differences in vigor of seeds at different positions on one maize ear at epigenetic level.