bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Study on Mode I Fracture Characteristics of Granite after Low Temperature Cooling with Liquid Nitrogen
Authors: Wang Linchao , Xue Yi , Cao Zhengzheng , Kong Hailing , Han Jianyong , Zhang Zhizhen
Published: October 2023

Liquid nitrogen fracturing has emerged as a promising technique in fluid fracturing, providing significant advantages for the utilization and development of geothermal energy. Similarly to hydraulic fracturing in reservoirs, liquid nitrogen fracturing entails a common challenge of fluid–rock interaction, encompassing the permeation and diffusion processes of fluids within rock pores and fractures. Geomechanical analysis plays a crucial role in evaluating the transfer and diffusion capabilities of fluids within rocks, enabling the prediction of fracturing outcomes and fracture network development. This technique is particularly advantageous for facilitating heat exchange with hot dry rocks and inducing fractures within rock formations. The primary objective of this study is to examine the effects of liquid nitrogen fracturing on hot dry rocks, focusing specifically on granite specimens. The experimental design comprises two sets of granite samples to explore the impact of liquid nitrogen cooling cycles on the mode I fracture characteristics, acoustic emission features, and rock burst tendency of granite. By examining the mechanical properties, acoustic emission features, and rock burst tendencies under different cycling conditions, the effectiveness of liquid nitrogen fracturing technology is revealed. The results indicate that: (1) The ultimate load-bearing capacity of the samples gradually decreases with an increase in the number of cycling times. (2) The analysis of acoustic emission signals reveals a progressive increase in the cumulative energy of the samples with cycling times, indicating that cycling stimulates the release of stored energy within the samples. (3) After undergoing various cycling treatments, the granite surface becomes rougher, exhibiting increased porosity and notable mineral particle detachment. These results suggest that the cyclic application of high-temperature heating and liquid nitrogen cooling promotes the formation of internal fractures in granite. This phenomenon is believed to be influenced by the inherent heterogeneity and expansion–contraction of internal particles. Furthermore, a detailed analysis of the morphological sections provides insights into the structural changes induced by liquid nitrogen fracturing in granite samples.
Formation of Microalgal Hunting Nets in Freshwater Microcosm Food Web: Microscopic Evidence
Authors: Kovačević Goran , Petrinec Daniela , Tramontana Ljubičić Petra , Reipert Siegfried , Sirovina Damir , Špoljar Maria , Peharec Štefanić Petra , Želježić Davor
Published: October 2023

The microcosm is a laboratory method frequently used in ecological studies related to population and food web interactions and environmental dynamics. It simultaneously brings into interaction different species in the same controlled laboratory experimental area and provides an opportunity for modeling and reconstruction of relationships in the natural biocenoses and ecosystems. We applied that approach to determine and improve our understanding of predator–prey interactions in different freshwater environments. The inhabitants of the microcosms were isolated endosymbiotic microalga Desmodesmus subspicatus (Chlorophyceae) (Chodat) Hegewald et Schmidt (CZ), green hydras, freshwater turbellarians, and large water fleas. Experiments were performed in five replicates, at 25 °C and 13.5 °C, with fed and hungry predators, respectively. Herein, we proposed a mechanism for microalgal hunting net formation in the freshwater microcosm. Ultrastructural visualization of the endosymbiotic microalgae revealed rod-like structures on the cell wall surface, structures that could possibly fit together and interconnect, suggesting the possibility of microalgal hunting net formation. Interspecific cooperation between isolated microalgae and turbellarians resulted in stronger hunting net formation in preying upon water fleas. This study contributes to the diversity of species interactions and shows the producers as a top link, as opposed to what is generally considered as a basic link in the food web, and presents the microalgae as triggers of the dynamics in the freshwater microcosm.
Estimation of Reference Evapotranspiration in Semi-Arid Region with Limited Climatic Inputs Using Metaheuristic Regression Methods
Authors: Sammen Saad Sh. , Kisi Ozgur , Al-Janabi Ahmed Mohammed Sami , Elbeltagi Ahmed , Zounemat-Kermani Mohammad
Published: October 2023

Different regression-based machine learning techniques, including support vector machine (SVM), random forest (RF), Bagged trees algorithm (BaT), and Boosting trees algorithm (BoT) were adopted for modeling daily reference evapotranspiration (ET0) in a semi-arid region (Hemren catchment basin in Iraq). An assessment of the methods with various input combinations of climatic parameters, including solar radiation (SR), wind speed (WS), relative humidity (RH), and maximum and minimum air temperatures (Tmax and Tmin), indicated that the RF method, especially with Tmax, Tmin, Tmean, and SR inputs, provided the best accuracy in estimating daily ET0 in all stations, while the SVM had the worst accuracy. This work will help water users, developers, and decision makers in water resource planning and management to achieve sustainability.
Application of a VOF Multiphase Flow Model for Issues concerning Floating Raft Aquaculture
Authors: Wang Kun , Li Nan , Song Lun , Wu Jinhao , Jiang Hengzhi
Published: October 2023

Floating raft aquaculture has gradually become a mainstream aquaculture model in the waters of Changhai County, Dalian. To quantitatively describe the impact of floating raft aquaculture facilities on the hydrodynamic environment of nearby sea areas, in this study, we took a single floating raft aquaculture structure as the research object and built a numerical prediction model for water flows passing through the floating raft aquaculture structure using a six-degree-of-freedom VOF (volume of fluid) multiphase flow simulation method based on an overset moving mesh system. Then, we verified the numerical model by utilizing oblique hydraulic jumps and water flows passing through a submerged bar. As shown by the findings, the simulated values are in good agreement with the theoretical solutions and measured values, indicating that the model features high precision and great stability. The impact of the raft area on the hydrodynamic force was introduced into the source term of an equation for consideration. In order to further determine the hindering effect of the raft body on the water body, transport equations and the tracer method were used to simulate the impact of floating raft aquaculture facilities on the water exchange performance of nearby sea areas. This study shows that the VOF multiphase flow model can be easily and accurately applied to studies on floating raft aquaculture, which can greatly reduce the limitations of experiments that utilize pure hydraulic models, wherein the impacts of floating raft aquaculture facilities on hydrodynamic force are generally considered simply based on observations, water roughness or the secondary drag force coefficient, thereby effectively improving the scientific understanding of the physical mechanism involved in floating raft aquaculture.
Spatiotemporal Urban Waterlogging Risk Assessment Incorporating Human and Vehicle Distribution
Authors: Li Lujing , Zhang Zhiming , Qi Xiaotian , Zhao Xin , Hu Wenhan , Cai Ran
Published: October 2023

Due to the increase in frequency and severity, assessing and predicting urban waterlogging risk is critical. The risk assessment framework is based on three factors: hazard, exposure, and vulnerability. The assessment indicators, previously based solely on static indicators, account for the effects of varying temporal and spatial distributions of people and vehicles on the assessment results. Specifically, two dynamic indicators—the population density and the Traffic Performance Index (TPI)—are added to the mix to dynamically assess the risk of waterlogging in the central urban area of Suqian City of Jiangsu Province, China’s central urban area, over various periods. The findings indicate that four–six times more individuals are affected during peak hours than during other periods, and no important roads are within the scope of waterlogging during other periods, while nearly ten important roads will be affected during peak hours. Additionally, the characteristics of the temporal and spatial distribution of waterlogging risk can be more accurately represented by a combination of static and dynamic indicators. The highest risk areas are significantly more prominent during the weekday peak period than during other times; the morning peak is mainly affected by traffic performance indicators, the evening peak is mainly affected by population density, and the main factors affecting the other periods are the same as the other main factors affecting the peak period. The highest risk areas are mainly located in the eastern part of the central urban area of Suqian City, with the lowest risk in the north and south.
Application of GIS, Multi-Criteria Decision-Making Techniques for Mapping Groundwater Potential Zones: A Case Study of Thalawa Division, Sri Lanka
Authors: Wijesinghe Dilnu Chanuwan , Mishra Prabuddh Kumar , Withanage Neel Chaminda , Abdelrahman Kamal , Mishra Vishal , Tripathi Sumita , Fnais Mohammed S.
Published: October 2023

Groundwater resources are depleting due to phenomena such as significant climate change and overexploitation. Therefore, it is essential to estimate water production and identify potential groundwater zones. An integrated conceptual framework comprising GIS and the analytical hierarchy process (AHP) has been applied for the present study to identify groundwater potential areas in the Thalawa division of Sri Lanka. The criteria, including rainfall, soil types, slope, stream density, lineament density, geology, geomorphology, and land use, were taken into account as the most contributing factors when identifying the groundwater zones. Weights were allocated proportionally to the eight thematic layers according to their importance. Hierarchical ranking and final normalized weighting of these determinants were performed using the pairwise comparison matrix (PCM) available in AHP. Based on the results obtained, the groundwater potential zone (GWPZ) was classified into three regions: low potentiality (33.4%), moderate potentiality (55.8%), and high potentiality (10.6%). Finally, the zoning map was compared to find consistency with field data on groundwater discharge and depth taken from 18 wells in the division. The results revealed that the GIS-multi-criteria decision-making (MCDM) approach brings about noticeably better results, which can support groundwater resource planning and sustainable use in the research area.
Using Self-Organizing Map and Multivariate Statistical Methods for Groundwater Quality Assessment in the Urban Area of Linyi City, China
Authors: Liu Shiqiang , Li Haibo , Yang Jing , Ma Mingqiang , Shang Jiale , Tang Zhonghua , Liu Geng
Published: October 2023

Groundwater holds an important role in the water supply in Linyi city, China. Investigating the hydrochemical characteristics of groundwater, and revealing the factors governing groundwater geochemistry, is a primary step for ensuring the safe and rational exploitation of groundwater resources. This study used a self-organizing map (SOM) and multivariate statistical methods to assess groundwater quality in the urban area of Linyi city. Based on the hydrochemical dataset consisting of nine parameters (i.e., pH, Ca2+, Mg2+, Na+, K+, HCO3−, Cl−, SO42−, and NO3−) from 89 groundwater samples, the SOM was first applied to obtain the weight vectors of the output nodes. Hierarchical cluster analysis (HCA) was used for organizing the nodes into four clusters. The node cluster indices were then remapped to the groundwater samples according to the winner node for each sample. The hydrochemical characteristics and factors controlling the groundwater geochemistry of the four clusters were analyzed using principal component analysis (PCA) and graphical methods including Piper and Gibbs diagrams, as well as binary plots of the major ions in groundwater. Results indicated that groundwater geochemistry in this area is primarily governed by water–rock interactions, such as the dissolution of halite, calcite, and gypsum, along with the influence of municipal sewage and the degradation of organic matter. This study demonstrates that the integration of an SOM and multivariate statistical methods improves the understanding of groundwater geochemistry and hydrochemical evolution in complex groundwater flow systems impacted by utilization.
Bottled Mineral Waters as Unconventional Sampling in Hydro-Geological Research
Authors: Rapti Dimitra , Martinelli Giovanni , Zheng Guodong , Vincenzi Clelia
Published: October 2023

Bottled mineral waters originate from groundwater aquifers, their chemical composition being initially determined by geochemical water-rock interaction processes. The waters used for bottling originate from different parts of the hydrological cycle and have a unique hydro-geochemical fingerprint. As water moves through the water cycle, the isotopic composition of oxygen and hydrogen in the water molecule may change. Determining 18O and 2H can help to characterize the source of bottled water and the natural conditions of the parent water body, of the recharge area, and the influence of various processes during infiltration and water flow within the water body. Usually, the chemical composition is reported on the label of bottled waters, while stable isotopes data are often unreported and are sometimes available from scientific publications. Bottled waters from selected sites of Europe where chemical and stable isotopic composition were available have been considered and accompanying data reinterpreted. The available data have been reinterpreted by obtaining results comparable, within limitations, to traditional sampling and analytical procedures, demonstrating the usefulness of the adopted methodology in emergency cases. Therefore, the utilization of isotopic values of bottled waters should be limited to the observation of general trends in isotopic composition of feeding waters, while more local studies are advised for a better understanding of the hydro-geological circuits.
Groundwater Level Prediction with Machine Learning to Support Sustainable Irrigation in Water Scarcity Regions
Authors: Li Wanru , Finsa Mekuanent Muluneh , Laskey Kathryn Blackmond , Houser Paul , Douglas-Bate Rupert
Published: October 2023

Predicting groundwater levels is challenging, especially in regions of water scarcity where data availability is often limited. However, these regions have substantial water needs and require cost-effective groundwater utilization strategies. This study uses artificial intelligence to predict groundwater levels to provide guidance for drilling shallow boreholes for subsistence irrigation. The Bilate watershed, located 80 km north of Arba Minch in southern Ethiopia and covering just over 5250 km2, was selected as the study area. Bilate is typical of areas in Africa with high demand for water and limited availability of well data. Using a non-time series database of 75 boreholes, machine learning models, including multiple linear regression, multivariate adaptive regression splines, artificial neural networks, random forest regression, and gradient boosting regression (GBR), were constructed to predict the depth to the water table. The study considered 20 independent variables, including elevation, soil type, and seasonal data (spanning three seasons) for precipitation, specific humidity, wind speed, land surface temperature during day and night, and Normalized Difference Vegetation Index (NDVI). GBR performed the best of the approaches, with an average 0.77 R-squared value and a 19 m median absolute error on testing data. Finally, a map of predicted water levels in the Bilate watershed was created based on the best model, with water levels ranging from 1.6 to 245.9 m. With the limited set of borehole data, the results show a clear signal that can provide guidance for borehole drilling decisions for sustainable irrigation with additional implications for drinking water.
Features of assessing the strategic potential of the restaurant business organization in the transition to a process management model
Authors: Serikov K. N. , Anisimov A. Yu.
Published: October 2023

The current state of social and economic processes in Russian restaurant business is the result of several crises of 2019–2022. In the last five years a combination of macroeconomic factors, influencing the development of economic instability in the external environment of Russian restaurant business, was formed, which in turn affected the change in strategic management in this field. The transformation of the strategic management of restaurant business takes place in several directions, one of which is the transition to the process model of management and the formation, in this regard, of new systems of assessment of strategies of management, based on the balance score card. The goal of the study is formation of the methods of assessment of strategic potential, which are adapted to the process model of management and make it possible to create a relevant base for making strategic managerial decisions. The methods of the study are: comparative analysis, statistical analysis, indicative analysis, SWOT analysis, method of ranking score of organization competitiveness. The result of the study is the methods of assessment of strategic potential of the organization of restaurant business, which are adapted to the process model of management and make it possible to create a relevant base for making strategic managerial decisions. The authors draw a conclusion that the system of indicators of efficiency of the strategy of development of the organization of restaurant business in the conditions of the transition to the process model of management should comply with the new requirements imposed by the external environment characterized by a high degree of uncertainty.
Multicriteria classification of public-private partnership forms
Authors: Shor I. M.
Published: October 2023

Public-private partnership, being one of the instruments of economic policy, actively used in the processes of creating and developing the infrastructure of Russian regions, has many forms. This circumstance predetermined the formulation of the purpose of the study, which is to develop a multi-criteria classification of PPPs in relation to regional economic policy. As a result of achieving this goal, the following results were obtained: the classification of PPP forms according to legal, organizational, managerial, functional and financial and economic criteria was carried out; the analysis of the practical application of PPP forms in Russian regions was carried out; measures were developed to ensure high rates of use of PPP forms in the implementation of regional economic policy.
Vacinas para Candidíase: uma revisão de literatura
Authors: Oliveira Isabella Eduarda de Godoy , Prieto Samara Tostes Peixoto , Almeida Luiza Rocha Lima , Cardoso Maria Luiza Santos , Carneiro Bárbara Souto de Gomes , Do Amaral Victor Machado , Martins Letícia Teixeira , Sampaio Marcella Vilela , Borges Maria Eduarda de Almeida
Published: October 2023

A candidíase é uma doença micótica que pode se manifestar em três tipos diferentes: mucocutânea, cutânea e sistêmica. Nesse viés, ela é capaz de causar vulvovaginites nas mulheres, cursando com quadro de prurido, hiperemia e ardor, o que traz muito desconforto e portanto, faz-se necessário meios de tratamento eficazes. Dessa forma, do material pesquisado e lido nas bases de dados, foram selecionados 13  artigos, entre os anos de 2001 a 2023, que  trouxeram conteúdos pertinentes para o cumprimento dos objetivos, da relevância e da atualidade do presente estudo. Assim, a vacina concentra-se na utilização de proteínas recombinantes expressas na superfície fúngica, tais como CWPs ou proteínas de adesão tipo aglutinação (Als), que são frequentemente visadas pelas respostas de memória adaptativas mais fortes. Estes são Als1 e Als3, esta última induziu uma resposta de anticorpos e uma taxa de sobrevivência mais elevada em comparação com a vacina Als1 e foi mais eficaz do que a Als1 em um modelo murino de candidíase orofaríngea e vaginal. Nesse sentido, é crucial o entendimento sobre a doença e como o agente causador se comporta para o desenvolvimento dos sintomas, estabelecendo um diagnóstico mais coerente e juntamente uma maior efetividade do tratamento com consequente diminuição na incidência da CVVR (candidíase vulvovaginal recorrente ) e uma diminuição nas taxas de resistência aos agentes antifúngicos.
Terrestrial Net Ecosystem Productivity in China during 1900–2100
Authors: Liu Jianzhao , Yuan Fenghui , Chen Ning , Wang Nannan , Zuo Yunjiang , Li Kexin , Guo Ziyu , Zhu Xinhao , Sun Ying , Zhang Lihua , Guo Yuedong , Xu Xiaofeng , Song Changchun
Published: October 2023

Terrestrial ecosystems are a critical carbon dioxide (CO
2
) sink for achieving carbon (C) neutrality before 2060 in China. Here, we used the Coupled Model Intercomparison Project phase 6 (CMIP6) model outputs to quantify the spatiotemporal patterns of net ecosystem productivity (NEP) and its major environmental controls, as well as the dominant C pools for NEP during 1900–2100. We found that (a) according to CMIP6 NEP spatiotemporal characteristics, terrestrial ecosystems in China sequestered 0.310 ± 0.058 Pg C·year
–1
during 1980–2014 and will act as a strong C sink [from 0.515 ± 0.075 Pg C·year
–1
under Shared Socioeconomic Pathway 126 (SSP126) to 0.631 ± 0.089 Pg C·year
–1
under SSP585] in the future (2015–2100). Pronounced turning points were found for the temporal trends of NEP during the historical (1984) and under 4 future emissions scenarios (2057 for SSP126, 2053 for SSP245, 2038 for SSP370, and 2044 for SSP585). (b) The positive effect of temperature on NEP appears to weaken after each turning point of future scenarios. (c) The enlarged vegetation C pool size dominates the growing terrestrial ecosystem C storage. The CMIP6 projection shows that the total C storage in Chinese terrestrial ecosystems increases continuously and peaks in the 2040s to 2050s under each scenario. Future afforestation in the northeast, southeast, and southwestern regions, as well as soil C pool management in the northwest and middle north regions, will greatly contribute to achieving C neutrality in China, particularly under low emission scenario (SSP126).
Piezoelectric Drop-on-Demand Inkjet Printing with Ultra-High Droplet Velocity
Authors: Yang Zhengjie , Tian Hongmiao , Wang Chunhui , Li Xiangming , Chen Xiaoliang , Chen Xiaoming , Shao Jinyou
Published: October 2023

Improving droplet velocity as much as possible is considered as the key to improving both printing speed and printing distance of the piezoelectric drop-on-demand inkjet printing technology. There are 3 tough and contradictory issues that need to be addressed simultaneously, namely, the actuation pressure of the piezoelectric printhead, satellite droplets, and the air resistance, which seems almost impossible to achieve with classical methods. Herein, a novel solution is introduced. By modulating the positive crosstalk effect inside and outside the printhead, self-tuning can be achieved, including self-reinforcing of the actuation pressure, self-restraining of satellite droplets, and self-weakening of the air resistance, thereby greatly improving droplet velocity. Based on these mechanisms, waveform design methods for different inks and printheads are investigated. The results demonstrate that monodisperse droplet jetting with a maximum velocity of 27.53 m/s can be achieved, reaching 3 to 5 times that of the classical method (5 to 8 m/s). Correspondingly, the printing speed and distance can be simultaneously increased by almost 10 times, demonstrating an ability of direct printing on irregular surface. Meanwhile, the compatibility of ink materials is expanded, as the Ohnesorge number and the viscosity of printable inks for the printhead used are increased from 0.36–0.72 to 0.03–1.18 and from 10–12 cp to 1–40.3 cp, respectively, even breaking the traditional limitations of the piezoelectric printing technology (Ohnesorge number of 0.1 to 1; viscosity of 1 to 25 cp). All the above provide a new perspective for improving droplet velocity and may even offer a game-changing choice for expanding the boundaries of the piezoelectric drop-on-demand inkjet printing technology.
Proposal for a Participatory Methodology for the Creation of Serious Games
Authors: Pacheco-Velazquez Ernesto , Bester Andre , Rabago-Mayer Lucia , Rodes-Paragarino Virginia
Published: October 2023

We are facing a new generation of students, who are not only looking for theoretical knowledge, but also want learning to be practical, interesting, and fun. They request didactic techniques that allow them to have a more prominent role in their learning, models that are not focused on teaching, but on learning. They are students with different characteristics because they were born in the digital age. Technology has changed the way they relate to the world. They are not comfortable with respect to traditional models and try to incorporate new technologies into all aspects of their lives. Within the educational field, new technologies are seen as a tool that facilitates learning and develops skills in students. From this perspective, the development of simulators and serious games are now used as a strategy to facilitate learning. The advantages of using a serious game seem evident, they help develop critical thinking, encourage creativity, increase problem-solving skills, increase retention, among other benefits. However, when games are not well designed, they lose both their appeal and their playful essence. One reason for these problems is the absence of the application of any design methodology, and that many of these problems come from the requirements definition phase. Specifically, most of the problems occur in the game design phase, where there is a deficiency in the writing of the requirements requested by the teachers. When the requirements are vague, or ambiguous, experts in the development area are unable to interpret the interaction design, the game mechanics, or the way in which users will interact with the software. This article aims to discuss the specifications and requirements that instructional designers and developers should address before migrating to project development, implementation, or evaluation. This article is important because it analyzes the need to establish clear requirements and objectives that will facilitate the creation of serious games in education.
Semantics of the word tutor in modern Russian
Authors: Zalalova Regina R. , Gataullina Alsu G.
Published: October 2023

In the late 20th – the early 21st century, new names of professions that can be called the key words of the epoch entered the terminological vocabulary of the sphere of education. One of these lexemes is the borrowed word tutor, which is currently characterised by a high frequency of use in connection with the active introduction of the tutor profession into the educational system of Russia. This article examines the features of the semantics of the word tutor based on lexicographic sources, the National Corpus of the Russian language, texts of scientific articles on pedagogic topics. During the study, it was found that in modern Russian the lexeme tutor is used to name a wide range of people in the Russian educational system. At the same time, there is no description of the above-mentioned word in lexicographic sources with the definition of its meaning at different stages and forms of the educational system, in connection with which there is a vague understanding of its content. The paper defines the meanings of this name of a person, taking into account the peculiarities of its functioning in different speech spheres. The conclusion is made about the transformation of the semantics of the word tutor, which is associated with the introduction, and later with the expansion of tutor activity in the system of education and upbringing in Russia. As a result of the analysis of examples of the combination of the noun tutor, the spheres of its functioning are determined.
The role of the People's Commissariat of the Textile Industry of the USSR in the placement of Leningrad textile workers, re-evacuation of equipment and restoration of enterprises in 1942
Authors: Belgorodsky Valery S. , Dembitsky Sergey Gennadievich , Okolotin Vladimir Sergeevich
Published: October 2023

This article examines the activities of the People's Commissariat of the Textile Industry of the USSR for the placement of Leningrad textile workers, the re-evacuation of equipment, the restoration of destroyed enterprises and the construction of new facilities in 1942. Great attention is paid to solving organisational issues of increasing production capacity in order to produce finished products necessary for uninterrupted supply of the needs of the front and rear. The content of the article is mainly based on the materials of Moscow, Ivanovo and Yaroslavl regions, since it was their textile enterprises that bore the main burden of fulfilling defence orders during the period under review. To write it, the office materials of the People's Commissariat of the Textile Industry of the USSR, the State Planning Commission under the Council of People’s Commissars of the USSR, the State Defence Committee and the Office of Alexei Kosygin were used. Most of such information obtained in the State Archive of the Russian Federation, the Russian State Archive of Economics, the Russian State Archive of Socio-Political History and the State Archive of Ivanovo Region has been introduced into scientific circulation for the first time. The article is addressed to specialists in the field of the history of Russian textile industry, to graduate students, undergraduates and students of higher educational institutions.
The forgotten legacy of Pavel Katenin: Shayovo noble estate near Kologriv
Authors: Lebedev Aleksandr V.
Published: October 2023

The article is devoted to the history of the Shayovo estate located in Kologriv district of Kostroma Region, which was owned by the Decembrist poet Pavel Aleksandrovich Katenin (1792-1853) in the first half of the 19th century. The features of the planning of the estate complex associated with the natural features of the territory and the personality of the owner, are shown. Shayovo played an important role in the life of Pavel Katenin. Here he served a link in the 1820s, doing housekeeping and literary activities. The core of the estate occupied the highest part of the relief and included a large one-story wooden house, an open parterre and an access spruce alley. Near the manor’s house there was an orchard and a kitchen garden. The estate was one of the main sources of income, so a significant part was occupied by the service and economic zone. After the death of Pavel Katenin’s estate was inherited by his nephews, and later it was sold to V.V. Radziszewski, who became the last owner. In the mid-20th century, the territory of Shayovo fell into disrepair. All manor buildings and most of the planning elements were lost. To preserve the memory of the life and work of Pavel Katenin currently requires the arrangement of the territory of the former estate with the installation of information stands and the development of a tourist excursion route.
Modes of ‟short-story-studies”: the individual community of the historical and literary narrative of Prince Mirsky and Vladimir Nabokov
Authors: Ryaguzova Lyudmila N.
Published: October 2023

The article discusses some aesthetic conclusions and methods of historical and literary generalisations in combination with Dmitry Svyatopolk-Mirsky (hereinafter Prince Mirsky) and Vladimir Nabokov. The topic is contained in a professional methodological study of criticism of the Russian diaspora, in the aspect of their traditions and innovations. In order to clarify the most reliable and textually confirmed arguments, the following research methods are used: comparative-historical, conceptual, structural-semiotic and stylistic. The scientific novelty of the observations is due to the comparison of the scientific mythology of Prince Mirsky and Vadimir Nabokov (as literary personalities) and their categorical apparatus, in particular the parallels drawn in terms of the principles of critical analysis, the problems of speech worldview and the metaphorical style of their scientific thinking, both topical and insufficiently studied aspects of the creative heritage. The reader’s perception and personal assessment underlie their aesthetic verdicts, with methodological principle bringing together the positions of Prince Mirsky and Vladimir Nabokov, who analyse the evolution of aesthetic vision as a way of depicting life forms and reflecting our ideas about it in them. Prince Mirsky, just as well as later Vladimir Nabokov, assert an aesthetic approach, refusing to perceive literature as a sermon or a “photograph of contemporaneity, both appreciate the ontological meaning and ‟individual genius” in literature. As a result, a conclusion is made about the unique individual authors’ vision of the historical topology and conceptology of Russian literature as a semiotic category, the identification of its cultural codes, ‟landmarks”, ‟strokes”, ‟masterpieces”, which form the ‟cultural synthesis” of this unique phenomenon in the reader’s perception, expressed in a unique way, in other words, about the creation of the vice versa history of Russian literature (its modus vivendi).
Physico-chemical properties of the oral fluid and their importance in ensuring dental health
Authors: Kotelban А.V.
Published: October 2023

Background. The incidence of dental caries is high regardless of age and region. In this regard, there is a need to study the risk factors for the development of caries, in particular, the physicochemical properties of oral fluid as one of them.

Aim of the research was to study the physico-chemical properties of oral fluid in children with caries of different levels of intensity and in caries free children.

Materials & Methods. An examination of 6-year-old children living in Bukovina was conducted. The following observation groups were selected: Group I – 69 children suffering from caries, and Group II – 26 caries free children. The rate of saliva secretion, physicochemical properties of oral fluid were studied: pH, viscosity, buffer capacity. The probability of the results was statistically assessed.

Results. In children with different levels of caries intensity, the level of salivation differed: for children with a high level of intensity was characterized by a low level of salivation, and for children with a low level – a high level of salivation. The viscosity of saliva was increased in children with caries of varying intensity. The buffer capacity of saliva was low in children with low levels of caries and very low in children with high levels of caries. PH in children with medium and high intensity was below normal. The analysis of the results of the Test of enamel resistance depending on caries activity showed that in children with a low level of intensity of caries, the enamel was conditionally resistant, and under the conditions of medium and high levels of intensity – the average structural and functional resistance of the enamel and the average acid resistance of the teeth.

Conclusions. Thus, in children suffering from caries with different levels of intensity, there are changes in the quantitative and qualitative parameters of the oral fluid, which lead to disorders of the homeostasis of the oral cavity and deepening of the pathological process in the hard tissues of the teeth.

Keywords: caries, children, buffer capacity, level of salivation, pH.
Nonlinear feedback control based on a coordinate transformation in multi-machine power systems
Authors: Wen Xuecheng , Furtat Igor B.
Published: October 2023

This paper proposes a novel nonlinear feedback control for multi-machine power systems with unknown parameters. There is no need for a state observer and knowledge of the system parameters. The implementation of the control system is therefore more simple. The proposed control algorithm maintains the power angle of each generator within a predetermined restriction for any time and enhances transient stability simultaneously. Simulation results illustrate the effectiveness of the proposed algorithm.
دور الاردن في مؤتمرات القمة العربية
Authors: Al.Sharah Mohammad K. , Barakat Nizam M.
Published: October 2023

الأهداف: تهدف هذه الدراسه بيان مدى مساهمة الأردن في قرارات مؤتمرات القمة العربية وتأثير هذه القرارات عليه.
المنهجية: لتحقيق اهداف الدراسه استخدم الباحث مجموعه من المناهج التاليه: المنهج الوصفي التحليلي من اجل تشخيص مشكله البحث وعمل تقرير خصائص هذه المؤتمرات وتحليل الانتقادات التي وجهت لها، منهج صنع القرار من خلال متابعة الإشكاليات الخاصة باتخاذ القرارات في المؤتمر، منهج تحليل النظم في دراسة مدخلات البيئة العربية على سبب انعقاد المؤتمرات ومخرجاتها كقرارات وسياسات، وأخيرا المنهج التاريخي لمتابعة تطور مؤتمرات القمة زمانيًا لبيان التطورات التي حدثت على مسيرة القمة وتنامي دور الأردن الفعال للالتزام بمقررات القمة العربية وإجراء المصالحات وحل الخلافات العربية والسعي للاستجابة والتفاعل مع المتغيرات العربية والدولية.
النتائج: في النهايه قدمت الدراسة  مجموعة من النتائج المتعلقة بفاعلية مؤتمرات القمة العربية وزيادة أهميتها حيث أبدى الأردن اتجاهاً جلياً نحو الالتزام بحضور مؤتمرات القمة العربية ولعب درواً حاسماً في اتخاذ قراراتها نتيجة الدبلوماسية النشطة للقيادات الأردنية المتعاقبة على الحكم، كما أنه كان دوماً ملتزماً بتنفيذ القرارات الصادرة عن مؤتمرات القمة العربية مغلباَ المصلحة العربية العليا حتى على حساب مصالحه الخاصة في بعض الأحيان.
التوصيات: قدم الباحث مجموعة من التوصيات منها: الاهتمام بانعقاد المؤتمرات بصورة مستمرة وضرورة تغليب المصلحة العامة العربية العليا على حساب المصلحة الخاصة بكل دولة، وأعد ملحق بمؤتمرات القمة في نهاية البحث يبين تسلسل هذه المؤتمرات وسبب انعقادها وأهم القرارات التي اتخذت فيها.
القدرة التنبؤية للاتزان الانفعالي بالإجهاد الذهني لدى طلبة السنة الأولى في الجامعة
Authors: Al-Rawwad Theeb , Al-Adamat Omar , Rbabah Khalid
Published: October 2023

الأهداف: هدفت الدّراسة الحالية إلى تعرُّف مستوى الاتزان الانفعالي، والإجهاد الذهني، ومعرفة فيما إذا كانت هنالك فروق في مستوى الاتزان الانفعالي وفقًا لمتغيريّ الجنس، والتّخصّص الأكاديميّ والتفاعل بينهما. وكذلك هدفت إلى الكشف عن القدرة التنبؤية للاتزان الانفعالي بالإجهاد الذهني. تكوّنت عيّنة الدّراسة من (336) طالبًا وطالبةً من طلبة السنة الأولى في جامعة الحسين بن طلال، جرى اختيارهم بالطريقة المتيسرة.
المهنجية: استخدمت الدّراسة المنهج الوصفي الارتباطي في البحث؛ إذ استُخدم مقياسين، مقياس للاتزان الانفعالي، ومقياس للإجهاد  الذهني.
النتائج: أظهرت نتائج الدّراسة أنّ مستوى الاتزان الانفعالي جاء بمستوى متوسط، وإنّ مستوى الإجهاد الذهني جاء بمستوى متوسط. ووجود فروق دالّة إحصائيًّا في مستوى الاتزان الانفعالي تُعزى لمتغيّر الجنس، ولصالح الذكور، ووجود فروق دالّة إحصائيًّا في مستوى الاتزان الانفعالي تُعزى لمتغيّر التّخصّص الأكاديميّ ولصالح الكليات العلمية. وكذلك أظهرت النتائج وجود فروق دالّة إحصائيًّا في مستوى التفاعل بين متغيري الجنس والكلية في مستوى الاتزان الانفعالي، وكانت الفروق لصالح الكليات العلمية عند الذكور ولصالح الكليات الإنسانية عند الإناث، وكذلك أظهرت النتائج أن الاتزان الانفعالي قد فسر ما نسبته (%5.2) من الاجهاد الذهني.
الاستنتاجات: بناءً على نتائج الدّراسة، توصي الدّراسة بضرورة تضمين وتوظيف جوانب الاتزان الانفعالي، وطرق تحقيقه في المواد الدّراسية، وتشجيع الأنشطة اللامنهجية المختلفة
An Analysis of the Urban System in Daqahlia Governorate, Egypt (1947-2017)
Authors: Taiema Fatma saber
Published: October 2023

Objectives: The present paper deals with the characteristics of the urban system in the Daqahlia Governorate of Egypt across seventy years (1947-2017), through the analysis of the urban growth, the change in cities' sizes, and the hierarchy of the cities and their spatial distribution.
Methods: A set of statistical measures and GIS software were used to perform the analyses. The measures include: The Rank-size rule, The First City Law (Jefferson), the urban primacy index (UPI), an urban concentration index, and the nearest neighbor as performed in GIS.
Results: The results show that, despite a significant change in the size of cities, the urban system does follow a power-law, with an exponent satisfying the rank–size rule. However, Al-Mansurah-Talkha metropolitan area exhibited a highly stable primacy index throughout the 70-years period. The urban concentration index of Mutlu (1989) was steadily declining, meaning more cities and more competition within the urban system.
Conclusions: Overall, the urban system seems to be mature and stable in terms of both rank-size and primacy. However, many research gaps are still to be filled since it is expected that the city sizes in Daqahlia would witness a re-adjustment process to accommodate the migration to the New Mansoura
Stylistic Features in the Translation of George Eliot’s The Lifted Veil into Arabic
Authors: Mudaghmesh Laila , Allawzi Areej
Published: October 2023

Objectives: This study aims at examining the translatability of George Eliot’s employed in The Lifted Veil. Thus, major stylistic features that pose problems in the translation process are discussed along with examples extracted from the source text and the target text. These stylistic features consist of idioms, figurative language and code-switching. The researcher suggests, as well, strategies and approaches to overcome these problems with the aim of delivering, closest possible, the contextual meaning of the aforementioned stylistic features while maintaining their natural flow.
Methods: a number of strategies listed by Baker (1992), Newmark (2001), Pierini (2007), Chesterman (1997), and Venuti (1995) are adopted. The researcher also employs Nida’s (1964) dynamic and formal equivalence approaches.
Results: The results of the study show that the stylistic difficulties stem from several reasons: cultural differences with regard to the use of metaphors and similes, allusive reference that may not function properly if it is not recognized by the target audience, and lastly, the researcher’s lack of comprehensive background of the Latin and French languages used in the novella.
Conclusions: It is found that rendering Eliot’s style into Arabic, while preserving its contextual purpose and natural flow is possible through the utilization of suitable strategies and approaches.
The Legendary Vision in the Novel "The Alchemist" written by Paulo Coelho
Authors: El Aroud Ahmed Yassin
Published: October 2023

Objective: This study aims to analyze Paulo Coelho's novel "The Alchemist" through the lens of a mythical vision dominating the narrative formation. It explores how the writer conveys his vision and ideas about a world shaped by the mythical interpretation of cosmic phenomena, where religions and social values do not hold ultimate authority. Instead, aspirations, dreams, and subjective visions play a significant role in explaining the universe and its manifestations.

Methods: The study employs an analytical methodology, encompassing a comprehensive examination of the novel's text and interconnecting the significance and meanings within the interpretive dimension of the events, characters, time, and location depicted in the story.

Results: The study found that a mythical vision guides the fictional work, leading to the realization of what Coelho refers to as "the personal legend" or "the Language of the Universe." It identifies Coelho's use of mythical dimensions and magical elements as means to achieve the novel's central goal, the pursuit of life's purpose. The study perceives this approach as distinctly mythical in nature.

Conclusion: This novel offers rich content, inspiring readers to explore its deeper meanings and implications carried by the text and its narrative.
Music Education and the COVID-19 Pandemic: Reflections of Teaching Music Theory Online
Authors: Ebbini Noor
Published: October 2023

Objectives: This paper aims to identify the challenges that music theory teachers and students have faced upon the sudden educational shift from traditional face-to-face learning environments to virtual instruction due to the COVID-19 pandemic. The research also investigates the social, cognitive, and learning obstacles that students may have experienced throughout the pandemic.
Methods: Using the author’s own experience in teaching music theory during the pandemic as a primary resource for the study, in addition to existing literature on pedagogy, music theory education, and E-learning as secondary data, the researcher uses a descriptive approach to achieve the main objectives of the study.
Results: The study reveals several interactive, educational, and cognitive-based difficulties that students and teachers have encountered during distance learning. The research highlights the challenges of teaching music theory via online platforms and existing software programs that lack the technical features needed for the effective instruction of this quasi-mathematical, musically-centered subject. 
Conclusion: The researcher suggests a number of pedagogical strategies that can assist online music theory instructors during and after the pandemic. The author concludes by recognizing the urgent need for institutional and technological interference to ensure that future online learning endeavors are effective and successful
Implications of Solipsism in Samuel Coleridge's "Frost at Midnight" and "Dejection: An Ode"
Authors: Aburumman Manal , Majdoubeh Ahmad Y.
Published: October 2023

Objectives: This research aims to examine Samuel Coleridge's "Frost at Midnight" (1798) and "Dejection: An Ode" (1802). It explores the implications of solipsism in these two poems.

Methods: To achieve this purpose, the research reviews some major works in philosophy that dwell on solipsism, briefly traces the evolution of solipsism, how some philosophers and literary critics define and employ the concept in literature, and how solipsism specifically features Coleridge’s thought. Through a critical and an analytical reading of the two chosen poems, the research highlights solipsistic inclinations. Additionally, the research valorizes how Coleridge uses poetry to negotiate his own philosophy and highlight his skeptical view of the world.

Results: This analysis eventually manifests how the existence of the external world becomes merely a reflection of the poet's mind, and surroundings acquire their meanings according to his state of mind.

Conclusions: By examining the relationship between solipsism and Coleridge's two poems, the research suggests a more comprehensive revision of Coleridge’s poetry on the one hand, and introduces new possibilities for exploring the affinity between romantic literature and solipsistic philosophy on the other hand.
Pelatihan Perancangan Semprotan Hama Elektrik Sederhana Kepada Masyarakat Pertanian Desa Lok Baintan Luar
Authors: Triyanto Irfan Rusydi , Yusri  , Sadri Khairul
Published: October 2023

This service aims to enhance the understanding and use of simple technologies by the villagers of Lok Baintan Luar, especially in the design of simple electric sprayers. The implementation approach adopted included a series of workshops and training aimed at the farming community of Lok Baintan Luar village. This dedication has created a significant positive impact. First, there is an increase in the agricultural community's enthusiasm for learning this simple technology. Workshop and training participants were actively engaged in the learning process, showing a keen interest in learning, and implementing this simple electrospray technology in their agricultural practices. Second, this commitment also creates strong momentum within the agricultural community to adopt this simple technology into their daily operations. This reflects their deep desire to increase farm efficiency and productivity using accessible technology. As a result, this service not only succeeds in increasing people's understanding of a simple technology but also encourages them to adopt this technology as a valuable tool in their agricultural practices, has a positive impact on local agricultural development.