bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improvement of critical current density J
c in powder-in-tube rapid heating, quenching and transformation Nb3Al wires by doping with nano-SnO2
Authors: Yang Changkun , Qu Pengshuai , Li Shulong , Sun Xiaguang , Xu Min , Liu Lian , Chen Yong Liang , Wang Wentao , Zhang Yong , Feng Yong , Yu Zhou , Zhao Yong 
Published: March 2023

Abstract
We prepared Nb3Al superconducting wires doped with nano-size SnO2 (n-SiO2) particles through a multi-time rapid heating and quenching process and investigated their microstructure and superconducting properties. All the samples showed a highly homogeneous A15 Nb3Al phase. Compared with pure Nb3Al, the n-SnO2 doped Nb3Al wires presented a larger ΔT
c value and a higher J
c value. The best J
c at 4.2 K was found in the 1 wt% n-SnO2 doped Nb3Al sample, with 3.37 × 105 A cm−2, 2.55 × 105 A cm−2 and 1.80 × 105 A cm−2 at 8 T, 10 T and 12 T, respectively. These results were an improvement of about 60% compared with pure Nb3Al at the same applied fields. The maximum irreversible field value was obtained in the 1 wt% SnO2-doped Nb3Al wire, with a result of 29.5 T at 4.2 K. The improvement of J
c performance in the n-SnO2 doped Nb3Al wires might be attributed to the formation of artificial nanoparticles in the grain, which act as extra effective flux pinning centers.
Nonrelativistic quantum effects of the Lorentz symmetry violation on the Morse potential
Authors: Bakke K , Belich H 
Published: March 2023

Abstract
We search for Lorentz symmetry violation effects at low-energy regime by exploring the Dirac equation in (1 + 1)-dimensions and the possibility of dealing with quantum systems with spherical symmetry. We bring a discussion about the influence of the Lorentz symmetry violation effects on the spectrum of molecular vibrations caused by the coupling between a fixed vector field and the derivative of the fermionic field. Further, we discuss the influence of this Lorentz symmetry violation background on the revival time.
9th International Scientific Conference on Sustainability in Energy and Environmental Science
Authors: Semerikov S O , Khvostina I M , Horal L T , Solovieva V V 
Published: March 2023

Abstract
This paper represents a preface to the Proceedings of the 9th International Scientific Conference on Sustainability in Energy and Environmental Science (ISCSEES 2022) held worldwide on June 22–24 2022. Background information and the organizational structure of the meeting, program committee, and acknowledgments of the contributions of the many people who made the conference a success are presented.
Resource efficiency and pricing policy of industries the sustainable development context
Authors: Shmygol N , Łuczka W , Khvostina I , Chyba Z , Galtsova O 
Published: March 2023

Abstract
In the article, the authors analyzed the theoretical foundations of sustainable economic growth based on the research of modern foreign and domestic scientists. It is proved that the economy of the linear type has exhausted itself due to the effect of scale. That is why, today, one of the foreground of research areas among leading domestic and foreign scientists is the concept of sustainable development which should be based on cyclical or circular economy principles. One of the directions of development is working out methods of products price formation taking into account resource-efficient strategies. The article presents price equilibrium scenarios developed by the authors, which were implemented in the oil and gas industry based on business activities for 2015-2020. These scenarios were developed by the authors using Leontiev’s cross-industry model, which explores how do these changes can impact the performance of resource use, based on changes in direct cost ratios, value added ratios and intermediate consumption ratios.
Development of territorial communities: aspects of natural capital conservation and budget financing
Authors: Yakymchuk A , Panukhnyk O , Horal L , Hrynkevych S , Rohozian Y 
Published: March 2023

Abstract
The development of efficient local governance and establishment of comfortable conditions for the living activity are the major strategic tasks of the public governance and authorities’ decentralization system modernization that is currently underway in Ukraine. The complicated socio-environmental and economic situation faced by Ukraine due to the deployment of military and political events, the collapse of the national currency, the deformation of industrial infrastructure, the depletion of natural capital, the exhaustion of natural resources, the spread of coronavirus infection COVID-19, and other destabilizing factors constitutes an incredibly high threat to the socio-political and economic security of the state as a whole and of each territorial community (TC). In this perspective, each element of the complex national economy system is important and should be translated into the principles of intellectualization in a strategic perspective. Today, the economic systems of both the state and the TCs are largely supported by international organizations – mainly through the provision of international loans and grants. The harmonization of national legislation on the preservation and reproduction of natural capital with European directives is the priority area of the foreign policy of Ukraine. Cooperation with international organizations sets a number of requirements for Ukraine, including the transparency of financial flows and natural capital accounting. Clear regulation of accounting, storage, and reproduction of natural capital is an urgent task of the public administration system. Taking into account the fact that climate security is a global problem, adaptation of national standards to European directives will make it possible to unify the information support of public finances and form a strategy for the development of natural capital. The main factors of economic efficiency in the Republic of Poland and Ukraine are compared. The research verifies the regression relationships between budget funding of territorial communities and the population of these territorial communities and provides conclusions about the efficiency of TCs’ funding in Ukraine.
Integrated approach to land management with self-sown forests in Ukraine
Authors: Stoiko N , Kostyshyn O , Cherechon O , Soltys O , Smoliarchuk M 
Published: March 2023

Abstract
Protection and recovery of land natural ecosystems is a relevant task of sustainable development. Natural recovery of forests is an important instrument to solve the problem. The article describes the integrated approach to management of land use with self-sown forests, which have become a wide-spread phenomenon on the agricultural lands in Polissia and Forest-Steppe zones of the western Ukraine. The authors conducted an interview, which demonstrated people’s attitude to self-afforestation of lands. The idea of protecting self-sown forests was supported by one third of the respondents. Among those, who wish to possess a land plot with forests, the main share is represented by people of the age category of 21-40 years old. The authors substantiate the potential value of ecosystem services, which can be supplied by self-sown forests by introducing different practices. A focus is made on the ecosystem benefits from protection of self-sown forests, which cannot be expressed in money terms, but are of environmental and social value for the community. A model of integrated management of agricultural lands with self-sown forests was developed. It is suggested to use planning as an instrument, which involves assessment of the potential of land and other resources, to determine alternatives of land use, considering economic and social conditions of the territory development and landscape characteristics. Ukraine should develop a policy, establish institutes and approve procedures intended to protect self-sown forests. In the future, it will reduce the area of ploughed land and improve biodiversity of the territory.
Education in the concept of circular economy in times of global crises
Authors: Gavkalova N , Lola Y , Poliakova H , Smalskis V , Tavshunskyi O 
Published: March 2023

Abstract
The article shows the relevance of transition to a cyclical economy in the society under the influence of global crises. Two hypotheses were proposed. Firstly, the formation of environmental values in Ukrainian society can be traced, which can create the basis for the transition of society to a circular economy model. Secondly, the important role of education in the implementation of the concepts of sustainable development and the circular economy has been confirmed, since it ensures the formation of environmental and economic consciousness, value orientations and social culture, trains specialists and develops the economy, in particular cyclical economy. To assess the hypotheses, the following were used: an online survey of representatives of the educational community. The results showed: 1) insufficient awareness of respondents about the nature of the circular economy; 2) the value of protecting the ecology of the region and the understanding of the importance of environmental protection in Ukrainian society are weak; 3) The most important problems include economic problems, but at the same time, environmental problems of the territories. An analysis of the scientific literature and coverage of foreign practical experience made it possible to determine the ways of developing education in support of sustainable development, the “green” and cyclical economy, the reorientation of higher and postgraduate education towards the training of specialists in the cyclical economy. The results can be useful in the formation and adaptation of educational and environmental strategies.
Structural changes in Ukraine’s electricity generation and their impact on the reduction of CO2 emissions
Authors: Kyzym M , Khaustova V , Horal L , Shpilevskiy V , Zinchenko V 
Published: March 2023

Abstract
The purpose of the study is to assess the state of and structural changes in Ukraine’s electricity generation and their impact on the reduction of carbon dioxide (CO2) emissions. For the investigation, data from the International Energy Agency and the National Power Company Ukrenergo were used. The study analyzes the trends in Ukraine CO2 emissions by economic sector, the trends in the country’s electricity generation and electricity generation capacities, the structure of electricity generation capacities by type of flexibility and presents the calculations of the integral coefficients of structural changes in the electricity generation capacities and electricity generation by type of flexibility. The study also examines how the structure of the energy sector of Ukraine has changed in terms of electricity generation. For this purpose, the structure of the Ukrainian electricity generation capacities and electricity generation by generation type is considered and the integral coefficients of structural changes in the electricity capacities and electricity production by generation type are calculated. Based on the study results, it is determined that, over the considered period, the decrease in Ukraine’s electricity generation was more significant than the decrease in its generation capacities, which has led to a corresponding reduction in CO2 emissions in the country; the structural changes in the electric power industry of Ukraine were not adequate to the structural changes in the country’s economy, which has led to a shortage in flexible capacities but also resulted in the reduction of CO2 emissions due to a decline in electricity generation.
Global trends in the behavior of consumers of retail enterprises in the digital economy
Authors: Kalashnikova T , Panchuk A , Bezuhla L , Vladyka Y , Kalaschnikov A 
Published: March 2023

Abstract
The purpose of the article is to identify the main changes that have taken place in the consumer behavior of retail enterprises under the influence of objective factors such as the transition to the digital economy, the crisis caused by the COVID-19 pandemic, and the transition of all businesses to new conditions of functioning. The authors present the directions of global changes in the motives, intentions, and means of purchase; identify the main drivers for the buyer in the new realities of retail trade. Based on the conducted primary and secondary researches features of consumer behavior both on a global, and regional scale are defined. The article reflects the changes in the channels of purchase of goods by category, as well as an assessment of the factors that cause feelings of consumer insecurity. The problems of Ukrainian trade enterprises are considered, taking into account the peculiarities of the behavior of Ukrainian consumers when making a purchase both physically and online. The problems that have arisen as a result of the COVID-19 pandemic are considered, and, taking into account the opinions of experts, conclusions are made on how retail companies will be able to adapt to the new conditions of the digital economy.
Influence of different hydroponic units on fish and plant performance and water quality in a snakehead fish-mint aquaponics system
Authors: Nguyen P C T , Tran Q N , Nguyen N H , Thai T T T , Nguyen N T 
Published: March 2023

Abstract
This study was done to assess the effect of two hydroponics cultivation (media bed (MB) and floating raft (FR)) on the performance of striped snakehead fish (SSF) (Channa striata Bloch, 1793) and mint (Mentha arvensis Linnaeus, 1953), and water quality parameters in the aquaponic system. Fish were cultured at a density of 500 fingerlings per m3 for 130 days. Mints were planted at densities of 40 and 34 lettuce m−2 in the MB and FR treatments, respectively, and had two cutting harvests. During the experimental period, levels of most water quality parameters analysed in the two treatments were in the optimal range for SSF and mint. After 130 days, all the growth performances and survival rates of fish in the FR treatment were higher than those in the MB treatment, but these differences were not statistically significant (P > 0.05). Fish growth performance was similar to those reported in other RAS and aquaponics studies, whereas FCR was lower. For mint, the plant height and diameter in the MB were significantly higher than those in the FR, but the fresh biomass in the FR was significantly greater than that in the MB (P < 0.05). In general, these results implied that the FR unit is more effective than the MB for culturing SSF (C. striata) with mint (M. arvensis) in aquaponics.
Extraction of anthraquinone and salicylic acid from Aloe barbadensis miller
Authors: Luong T M V , Nguyen T P T , Nguyen L N T , Tran T T T , Nguyen N T P , Mai C H 
Published: March 2023

Abstract
The objective of the research was to identify suitable parameters for extraction of anthraquinone, and salicylic acid from Aloe (Aloe barbadensis Miller). The parameters were evaluated including ethanol concentration (99.5, 80.0, 50.0%), material/solvent ratio (50 g/50 mL, 50 g/100 mL, 50 g/150 mL, 50 g/200 mL), stirring speed (100, 200, 300, 400 rpm), temperature (40, 45, 50, 55°C), extraction time (10, 20, 30, 40 minutes). Optimum conditions for anthraquinone and salicylic acid extraction on a laboratory scale were the ratio of 1/2 (g/mL), 50°C, 20 minutes and 300 rpm for the ratio of material/solvent, extraction temperature, extraction time, stirring speed, respectively using ethanol 99.5% as solvent extraction. The maximum anthraquinone and salicylic acid content are 0.31 mg/mL and 2.03 mg/mL, respectively.
Optimisation of hydrolysis conditions for yellowfin tuna (Thunnus albacares) heads using alcalase enzyme
Authors: Denis M , Pham H D , Nguyen M V 
Published: March 2023

Abstract
Fish protein hydrolysates contained small peptides and amino acids have many applications in food industry. The objective of the present study was to optimise the hydrolysis conditions (i.e., enzyme to substrate level, temperature and time) for preparing protein hydrolysates from yellowfin tuna heads using a complete composite design (CCD) of response surface methodology (RSM). The model equation was proposed with regard to the effects of enzyme to substrate level, temperature and time on the degree of hydrolysis (DH) and protein solubility (PS). The results indicated that all the hydrolysis conditions had a significant effect (P < 0.05) on both the DH and PS. An enzyme to substrate level of 0.82% (v/w), temperature of 55.0 °C and hydrolysing time of 7 h were found to be the optimum conditions to obtain the highest DH (28.0%) and PS (89.1%) using alcalase. The regression coefficients observed during both experimental and validation runs for DH and PS were 0.9381 and 0.9613, respectively, showing the validity of prediction models.
The changes in Gamma-aminobutyric acid and polyphenols in mung beans (Vigna radiata L.) during germination
Authors: Vu T A , Kha C T , Phan T H 
Published: March 2023

Abstract
Gamma-aminobutyric acid (GABA), an inhibitory neurotransmitter, plays a role in regulating neuronal excitability. Polyphenols naturally occur in plants and help to prevent or reverse damage in cells caused by aging, the environment, and lifestyle. Edible sprouts such as mung beans are a valuable source that presents high content of bioactive compounds. These contents in raw mung beans are very low, but they increase significantly during germination. The objectives of this study were to determine the most appropriate germination conditions, including air relative humidity (80%, 90%, and 99%), salt concentrations (0, 0.5%, 1.0%, and 1.5%), and light conditions (dark, LED, and UV-C) during the soaking and incubation processes to maximize the content of GABA and polyphenols. The results showed that all investigated treatments (air relative humidity, salt, and light) increased GABA and polyphenol levels, but LED lighting and air relative humidity of 90% were the most effective. Under those conditions, the content of GABA and polyphenols in the germinated mung beans increased about 12 and 2 times, respectively. Furthermore, the changes in GABA and polyphenol contents were different under different soaking and incubation conditions. In conclusion, the nutritional quality of mung beans, in terms of GABA and polyphenols, could be improved by controlling light and air relative humidity during germination. It is also recommended that the germination conditions, including air relative humidity, soaking in water or salt, soaking time, and incubation time should be selected depending on the desired content of GABA or polyphenols.
The factors affecting milk production of dairy cows in Ho Chi Minh City, Vietnam
Authors: Nguyen T T , Phan T N T , Tran P H , Tran T M T 
Published: March 2023

Abstract
The objective of the study was to evaluate the factors affected the milk production including milk yield and quality on dairy cow farms in Ho Chi Minh City. The milk data were collected from December 2021 to March 2022 at two farms (Farm A in Binh Chanh district and Farm B in Cu Chi district). Farm A, the data were collected from AfiFarm management software and the quality contents of fatness, solids-not-fat (SNF), protein, and lactose of the milk were analyzed in farm lab. The data of Farm B were filtered from Epacific management software. The milk somatic cell count (SCC) was examined by using Coulter Milk Cell Counter analyzer. The results showed the milk yield was seen differently between Farm A and B (P < 0.01). Farm A’s milk yield average from 121 cows was 20.15 kg/day/cow, and the contents evaluated from 422 milk samples were fatness 3.20%, SNF 8.99%, protein 3.49%, lactose 4.84%, and SCC 285,000 cells/mL. The milk yield and contents were seen differently between months on Farm A (P < 0.01), and found the highest quality in December with 21.10 kg/day, 9.10% SNF, 3.53% protein, 4.90% lactose and SCC lowest at 231,000 cells/mL. However, the milk yield of Farm B was 12.55 kg/day/cow of 220 cows. The results indicated the parity, number of milking udders (3, 4 udders), HF crossbreeding of Lai Sind cows and Holstein-Friezian bulls with F1 (1/2 HF), F2 (3/4 HF), F3 (7/8 HF), period of lactation (0 - 60, 61 - 120, > 120 days of milking) and months of year affected the milk yield on Farm B (P < 0.01). Evaluation of the milk quality from 100 milk samples on Farm B showed SCC was seen differently at 3 levels of milk yield (<10, 10 - 15 and > 15 kg/day/cow) (P < 0.05). The interesting finding was the cows having milk yield less than 10 kg/day correlating the risk of the milk SCC and decreasing the milk quality.
Experimental study on self-healing and mechanical properties of sisal fiber-loaded microbial concrete
Authors: Guo Yuanchen , Xiang Kai , Wang Huasong , Liu Xinzhou , Ye Qing , Wang Xue 
Published: March 2023

Abstract
Microbial concrete can make cracks self-healing, but the high alkalinity in concrete is not conducive to the survival and reproduction of microorganisms. In this study, using the porosity of the sisal fiber surface, microorganisms were immobilized on the sisal fiber, and the effects of several other microbial incorporation methods on the performance of self-healing concrete were compared. The fiber-loaded microbial concrete had the best self-healing effect, with a maximum self-healing width of 1.32 mm at 28 days. Splitting tensile strength is 28.7% greater than normal concrete, while compressive strength is 21.8% greater. The water absorption of sisal fiber enhanced the chloride permeability by 25.7%. Via microscopic examination, it was revealed that sisal fibers loaded a significant number of microorganisms and formed a large amount of calcium carbonate precipitation on the surface. Fiber-loaded microbial concrete’s elastic modulus and vickers hardness were 13% and 6% higher than normal concrete, respectively.
Accelerated design of chalcogenide glasses through interpretable machine learning for composition–property relationships
Authors: Singla Sayam , Mannan Sajid , Zaki Mohd , Krishnan N M Anoop 
Published: March 2023

Abstract
Chalcogenide glasses (ChGs) possess various outstanding properties enabling essential applications, such as optical discs, infrared cameras, and thermal imaging systems. Despite their ubiquitous usage, these materials’ composition–property relationships remain poorly understood, impeding the pace of their discovery. Here, we use a large experimental dataset comprising ∼24 000 glass compositions made of 51 distinct elements from the periodic table to develop machine learning (ML) models for predicting 12 properties, namely, annealing point, bulk modulus, density, Vickers hardness, Littleton point, Young’s modulus, shear modulus, softening point, thermal expansion coefficient, glass transition temperature, liquidus temperature, and refractive index. These models are the largest regarding the compositional space and the number of properties covered for ChGs. Further, we use Shapley additive explanations, a game theory-based algorithm, to explain the properties’ compositional control by quantifying each element’s role toward model predictions. This work provides a powerful tool for interpreting the model’s prediction and designing new ChG compositions with targeted properties. Finally, using the trained ML models, we develop several glass-selection charts that can potentially aid in the rational design of novel ChGs for various applications.