bluuebunny/crossref_metadata_2025 huggingface dataset:
High SARS-CoV-2 seroprevalence in children and adults in the Austrian ski resort of Ischgl
Authors: Knabl Ludwig , Mitra Tanmay , Kimpel Janine , Rössler Annika , Volland André , Walser Andreas , Ulmer Hanno , Pipperger Lisa , Binder Sebastian C. , Riepler Lydia , Bates Katie , Bandyopadhyay Arnab , Schips Marta , Ranjan Mrinalini , Falkensammer Barbara , Borena Wegene , Meyer-Hermann Michael , von Laer Dorothee
Published: June 2021

Background

In early March 2020, a SARS-CoV-2 outbreak in the ski resort Ischgl in Austria initiated the spread of SARS-CoV-2 throughout Austria and Northern Europe.

Methods

Between April 21st and 27th 2020, a cross-sectional epidemiologic study targeting the full population of Ischgl (n = 1867), of which 79% could be included (n = 1473, incl. 214 children), was performed. For each individual, the study involved a SARS-CoV-2 PCR, antibody testing and structured questionnaires. A mathematical model was used to help understand the influence of the determined seroprevalence on virus transmission.

Results

The seroprevalence was 42.4% (95% confidence interval (CI) 39.8–44.7). Individuals under 18 showed a significantly lower seroprevalence of 27.1% (95% CI 21.3-33.6) than adults (45%; 95% CI 42.2–47.7; OR of 0.455, 95% CI 0.356–0.682, p < 0.001). Of the seropositive individuals, 83.7% had not been diagnosed to have had SARS-CoV-2 infection previously. The clinical course was generally mild. Over the previous two months, two COVID-19-related deaths had been recorded, corresponding to an infection fatality rate of 0.25% (95% CI 0.03–0.91). Only 8 (0.5 %) individuals were newly diagnosed to be infected with SARS-CoV-2 during this study.

Conclusions

Ischgl was hit early and hard by SARS-CoV-2 leading to a high local seroprevalence of 42.4%, which was lower in individuals below the age of 18 than in adults. Mathematical modeling suggests that a drastic decline of newly infected individuals in Ischgl by the end of April occurred due to the dual impact from the non-pharmacological interventions and a high immunization of the Ischgl population.
Ion mobility mass spectrometry – an efficient tool for the analysis of conformational switch of macrocyclic receptors upon anion binding
Authors: Zimnicka Magdalena , Kalenius Elina , Jurczak Janusz , Danikiewicz Witold
Published: June 2021

Ion mobility mass spectrometry (IM-MS) supported by theoretical calculations allows describing the conformational changes of macrocycle receptors upon anion binding.
The fabrication of a flexible electrode with trace Rh based on polypyrrole for the hydrogen evolution reaction
Authors: Li Tiantian , Li You , Li Wenhao , Jia Shijie , Chen Xijie , Zhang Xin , Yang Fengchun
Published: June 2021

Electrons transfer from Rh to the N atom in PPy when Rh is composited with PPy to form more active sites, and the composite membrane can be used directly as self-supporting electrode whose electrocatalytic performance hardly changes after bending.
Enhanced polysaccharide nanofibers via oxidation over SiliaCat TEMPO
Authors: Ciriminna Rosaria , Scurria Antonino , Pagliaro Mario
Published: June 2021

Drawing on independent work carried out by academic and industrial researchers using the immobilized TEMPO catalyst SiliaCat TEMPO, in this study, we show how shifting the carboxylation process mediated by TEMPO in solution to a process mediated by the above-mentioned hybrid sol–gel catalyst allows the synthesis of insoluble polysaccharide nanofibers of superior quality, eliminating waste.
Micelle enabled C(sp2)–C(sp3) cross-electrophile coupling in water via synergistic nickel and copper catalysis
Authors: Ye Ning , Wu Bin , Zhao Kangming , Ge Xiaobin , Zheng Yu , Shen Xiaodong , Shi Lei , Cortes-Clerget Margery , Regnier Morgan Louis , Parmentier Michael , Gallou Fabrice
Published: June 2021

A robust and sustainable C(sp2)–C(sp3) cross-electrophile coupling was developed via nickel/copper synergistic catalysis under micellar conditions.
Ligand-bridged charge extraction and enhanced quantum efficiency enable efficient n–i–p perovskite/silicon tandem solar cells
Authors: Aydin Erkan , Liu Jiang , Ugur Esma , Azmi Randi , Harrison George T. , Hou Yi , Chen Bin , Zhumagali Shynggys , De Bastiani Michele , Wang Mingcong , Raja Waseem , Allen Thomas G. , Rehman Atteq ur , Subbiah Anand S. , Babics Maxime , Babayigit Aslihan , Isikgor Furkan H. , Wang Kai , Van Kerschaver Emmanuel , Tsetseris Leonidas , Sargent Edward H. , Laquai Frédéric , De Wolf Stefaan
Published: June 2021

27%-efficient perovskite/silicon tandem solar cells are achieved in n–i–p configuration by developing novel electron and hole selective contacts, which combine high broadband transparency with efficient charge extraction.
Associations between the indoor microbiome, environmental characteristics and respiratory infections in junior high school students of Johor Bahru, Malaysia
Authors: Fu Xi , Yuan Qianqian , Zhu Xunhua , Li Yanling , Meng Yi , Hashim Jamal Hisham , Hashim Zailina , Ali Faridah , Zheng Yi-Wu , Lai Xu-Xin , Spangfort Michael Dho , Wen Huarong , Wang Lingling , Deng Fengru , Hu Qiansheng , Norbäck Dan , Sun Yu
Published: June 2021

The first study to explore the association between environmental characteristics, microbiome exposure and respiratory infections in a public indoor environment.
Lattice-strained nickel hydroxide nanosheets for the boosted diluted CO2photoreduction
Authors: Liang Shujie , Han Bin , Ou Xinwen , Ye Xucun , Chen Weiyi , Deng Hong , Tian Chen , Lin Zhang
Published: June 2021

Lattice strain in ultrathin Ni(OH)2NS promotes CO2adsorption and activation, facilitates fast charge separation, which improves diluted CO2photoreduction in 0.05–1.00 atm CO2.
Beneficial impacts of fermented celery (Apium graveolens L.) juice on obesity prevention and gut microbiota modulation in high-fat diet fed mice
Authors: Zhao Dong , Cao Jinhu , Jin Huiqin , Shan Yanke , Fang Jian , Liu Fei
Published: June 2021

Metabolic syndrome caused obesity has long been recognized as a risk of health.
Effects of oral vitamin D supplementation on inflammatory bowel disease: a systematic review and meta-analysis
Authors: Guo Yiwen , Zhang Tao , Wang Yandan , Liu Ruijie , Chang Ming , Wang Xingguo
Published: June 2021

Vitamin D is a fat-soluble micronutrient that plays a critical role in inflammatory bowel disease.
High-efficiency electrochemical nitrite reduction to ammonium using a Cu3P nanowire array under ambient conditions
Authors: Liang Jie , Deng Biao , Liu Qin , Wen Guilai , Liu Qian , Li Tingshuai , Luo Yonglan , Alshehri Abdulmohsen Ali , Alzahrani Khalid Ahmed , Ma Dongwei , Sun Xuping
Published: June 2021

Cu3P enables ambient electrosynthesis of ammonium via selective NO2− reduction, achieving a yield rate of 1626.6 ± 36.1 μg h−1 cm−2 and a Faradaic efficiency of 91.2 ± 2.5%. The catalytic mechanism is investigated by theoretical calculations.
Constructing single Cu–N3 sites for CO2 electrochemical reduction over a wide potential range
Authors: Feng Jiaqi , Zheng Lirong , Jiang Chongyang , Chen Zhipeng , Liu Lei , Zeng Shaojuan , Bai Lu , Zhang Suojiang , Zhang Xiangping
Published: June 2021

A strategy was developed to obtain Cu–N3 sites in a Cu–N-doped carbon-based catalyst by utilizing metal ionic liquid as a precursor. The catalyst showed a high CO faradaic efficiency and a high current density within a wide potential range.
Nd, Am and Cm isotopic measurements after simultaneous separation in transmutation irradiated samples
Authors: Quemet Alexandre , Angenieux Mathilde , Ruas Alexandre
Published: June 2021

Combining HPLC separation, TIMS measurements and revised reference values help in measuring Am, Cm and Nd isotope ratios in irradiated samples.
Progress in mechanistically novel treatments for schizophrenia
Authors: Neef James , Palacios Daniel S.
Published: June 2021

Recent efforts to identify small molecules for schizophrenia with non-D2 mechanisms will be highlighted. The potential for disease modifying treatments for schizophrenia will also be discussed.
Catalytic role of graphitic nitrogen atoms in the CO oxidation reaction over N-containing graphene: a first-principles mechanistic evaluation
Authors: Esrafili Mehdi D. , Mousavian Parisasadat
Published: June 2021

The catalytic role of graphitic nitrogen atoms of a series of nitrogen-doped graphene surfaces is explored for low-temperature oxidation of CO using periodic DFT calculations.
Biocatalytic enantioselective hydroaminations enabling synthesis of N-arylalkyl-substituted l-aspartic acids
Authors: Abidin Mohammad Z. , Saravanan Thangavelu , Bothof Laura , Tepper Pieter G. , Thunnissen Andy-Mark W. H. , Poelarends Gerrit J.
Published: June 2021

EDDS lyase has a broad substrate scope, accepting diverse arylalkylamines in the enantioselective hydroamination of fumarate enabling the facile synthesis of difficult N-arylalkyl-substituted l-aspartic acids with excellent optical purity.
Pd(ii)-Catalyzed oxidative alkenylation of 4-hydroxycoumarin with maleimide via a C–H bond activation strategy
Authors: Sharma Kumud , Neog Kashmiri , Sharma Abhilash , Gogoi Pranjal
Published: June 2021

A Pd(ii)-catalyzed oxidative alkenylation of 4-hydroxycoumarins with maleimides has been developed for the direct synthesis of novel 4-hydroxy-3-maleimidecoumarins without prefunctionalization.
Solid-phase synthesis of coralmycin A/epi-coralmycin A and desmethoxycoralmycin A
Authors: Hawkins Paige M. E. , Liu Dennis Y. , Linington Roger G. , Payne Richard J.
Published: June 2021

A bidirectional solid-phase strategy is described for the total synthesis of coralmycin A and a desmethoxy analogue that possessed potent antibacterial activity.
Indium-mediated annulation of 2-azidoaryl aldehydes with propargyl bromides to [1,2,3]triazolo[1,5-a]quinolines
Authors: Zhang Xiaomin , Yang Jiali , Xiong Ni , Han Zhe , Duan Xinhua , Zeng Rong
Published: June 2021

A highly efficient synthesis of [1,2,3]triazolo[1,5-a]quinolines under mild conditions from the cascade annulation of 2-azidoaryl aldehydes with propargyl bromides.
A comprehensive study on lithium-based reactive hydride composite (Li-RHC) as a reversible solid-state hydrogen storage system toward potential mobile applications
Authors: Karimi Fahim , Pranzas Philipp Klaus , Puszkiel Julián Atillio , Castro Riglos María Victoria , Milanese Chiara , Vainio Ulla , Pistidda Claudio , Gizer Gökhan , Klassen Thomas , Schreyer Andreas , Dornheim Martin
Published: June 2021

Superb dehydrogenation/hydrogenation kinetic enhancement of the LiBH4–MgH2 reactive hydride composite system by addition of NbB2 nano-particles as nucleation agents for MgB2.
Fluorescent nanodiamond – hyaluronate conjugates for target-specific molecular imaging
Authors: Han Hye Hyeon , Kang Homan , Kim Seong-Jong , Pal Rahul , Kumar Anand T. N. , Choi Hak Soo , Hahn Sei Kwang
Published: June 2021

Fluorescent nanodiamond conjugated with hyaluronate is developed as a carbon based photostable and biocompatible material for liver-targeted molecular imaging applications.
Physically inspired deep learning of molecular excitations and photoemission spectra
Authors: Westermayr Julia , Maurer Reinhard J.
Published: June 2021

A physically-inspired machine learning model for orbital energies is developed that can be augmented with delta learning to obtain photoemission spectra, ionization potentials, and electron affinities with experimental accuracy.
Indirect reduction of CO2and recycling of polymers by manganese-catalyzed transfer hydrogenation of amides, carbamates, urea derivatives, and polyurethanes
Authors: Liu Xin , Werner Thomas
Published: June 2021

A Mn–PNP complex proved to be a suitable catalyst for the transfer hydrogenation of amides, carbamates, urea derivatives and even polyurethanes.
Tuning the defects in MoS2/reduced graphene oxide 2D hybrid materials for optimizing battery performance
Authors: Muthukumar Kamalambika , Leban Levon , Sekar Archana , Elangovan Ayyappan , Sarkar Nandini , Li Jun
Published: June 2021

This work reports the Li-ion and Zn-ion storage properties of a set of MoS2/reduced graphene oxide (rGO) hybrid materials whose defect density is tuned by controlling the annealing temperature, which is critical in improving Zn-ion storage.
An enhanced oxygen evolution reaction on 2D CoOOH via strain engineering: an insightful view from spin state transition
Authors: Li Feifei , Ai Haoqiang , Liu Dong , Lo Kin Ho , Pan Hui
Published: June 2021

Spin state of Co3+ ion transfers from low spin (LS: t62ge0g) to high spin (HS: t42ge2g) under strain engineering. HS CoOOH is much active for OER, because of small O2 release energy (0.03 eV) and effective directly O–O bond coupling (1.21 eV).
Rational design of electron/proton transfer mechanisms in the exoelectrogenic bacteria Geobacter sulfurreducens
Authors: Silva Marta A. , Portela Pilar C. , Salgueiro Carlos A.
Published: June 2021

The redox potential values of cytochromes can be modulated by the protonation/deprotonation of neighbor groups (redox-Bohr effect), a mechanism that permits the proteins to couple electron/proton transfer. In the respiratory chains, this effect is particularly relevant if observed in the physiological pH range, as it may contribute to the electrochemical gradient for ATP synthesis. A constitutively produced family of five triheme cytochromes (PpcA−E) from the bacterium Geobacter sulfurreducens plays a crucial role in extracellular electron transfer, a hallmark that permits this bacterium to be explored for several biotechnological applications. Two members of this family (PpcA and PpcD) couple electron/proton transfer in the physiological pH range, a feature not shared with PpcB and PpcE. That ability is crucial for G. sulfurreducens’ growth in Fe(III)-reducing habitats since extra contributors to the electrochemical gradient are needed. It was postulated that the redox-Bohr effect is determined by the nature of residue 6, a leucine in PpcA/PpcD and a phenylalanine in PpcB/PpcE. To confirm this hypothesis, Phe6 was replaced by leucine in PpcB and PpcE. The functional properties of these mutants were investigated by NMR and UV–visible spectroscopy to assess their capability to couple electron/proton transfer in the physiological pH range. The results obtained showed that the mutants have an increased redox-Bohr effect and are now capable of coupling electron/proton transfer. This confirms the determinant role of the nature of residue 6 in the modulation of the redox-Bohr effect in this family of cytochromes, opening routes to engineer Geobacter cells with improved biomass production.
RNA sequencing reveals potential interacting networks between the altered transcriptome and ncRNome in the skeletal muscle of diabetic mice
Authors: Kesharwani Devesh , Kumar Amit , Poojary Mukta , Scaria Vinod , Datta Malabika
Published: June 2021

For a global epidemic like Type 2 diabetes mellitus (T2DM), while impaired gene regulation is identified as a primary cause of aberrant cellular physiology; in the past few years, non-coding RNAs (ncRNAs) have emerged as important regulators of cellular metabolism. However, there are no reports of comprehensive in-depth cross-talk between these regulatory elements and the potential consequences in the skeletal muscle during diabetes. Here, using RNA sequencing, we identified 465 mRNAs and 12 long non-coding RNAs (lncRNAs), to be differentially regulated in the skeletal muscle of diabetic mice and pathway enrichment analysis of these altered transcripts revealed pathways of insulin, FOXO and AMP-activated protein kinase (AMPK) signaling to be majorly over-represented. Construction of networks showed that these pathways significantly interact with each other that might underlie aberrant skeletal muscle metabolism during diabetes. Gene–gene interaction network depicted strong interactions among several differentially expressed genes (DEGs) namely, Prkab2, Irs1, Pfkfb3, Socs2 etc. Seven altered lncRNAs depicted multiple interactions with the altered transcripts, suggesting possible regulatory roles of these lncRNAs. Inverse patterns of expression were observed between several of the deregulated microRNAs (miRNAs) and the differentially expressed transcripts in the tissues. Towards validation, overexpression of miR-381-3p and miR-539-5p in skeletal muscle C2C12 cells significantly decreased the transcript levels of their targets, Nfkbia, Pik3r1 and Pi3kr1, Cdkn2d, respectively. Collectively, the findings provide a comprehensive understanding of the interactions and cross-talk between the ncRNome and transcriptome in the skeletal muscle during diabetes and put forth potential therapeutic options for improving insulin sensitivity.
Probing galactic double-mode RR Lyrae stars against Gaia EDR3
Authors: Kovacs Geza , Karamiqucham Behrooz
Published: June 2021

Context. Classical double-mode pulsators (RR Lyrae stars and δ Cepheids) are important because of their simultaneous pulsation in low-order radial modes. This enables us to place stringent constraints on their physical parameters.

Aims. We use 30 bright galactic double-mode RR Lyrae (RRd) stars to estimate their luminosities and compare these luminosities with those derived from the parallaxes of the recent data release (EDR3) of the Gaia survey.

Methods. We employed pulsation and evolutionary models together with observationally determined effective temperatures to derive the basic stellar parameters.

Results. When we exclude six outlying stars (e.g., those with blending issues), the RRd and Gaia luminosities correlate well. With the adopted temperature zeropoint from one of the works based on the infrared flux method, we find it necessary to increase the Gaia parallaxes by 0.02 mas to bring the RRd and Gaia luminosities into agreement. This value is consonant with those derived from studies on binary stars in the context of Gaia. We also examined the resulting period-luminosity-metallicity (PLZ) relation in the 2MASS K band as follows from the RRd parameters. This leads to the verification of two independently derived other PLZs. No significant zeropoint differences are found. Furthermore, the predicted K absolute magnitudes agree within σ = 0.005 − 0.01 mag.
Our sustainable pandemic future
Authors: Semerikov Serhiy , Chukharev Serhii , Sakhno Serhiy , Striuk Andrii , Iatsyshyn Andrii , Klimov Serhii , Osadchyi Viacheslav , Vakaliuk Tetiana , Nechypurenko Pavlo , Bondarenko Olga , Danylchuk Hanna
Published: June 2021

This is an introductory text to a collection of papers from the ICSF 2021: Second International Conference on Sustainable Futures: Environmental, Technological, Social, and Economic Matters, which held at Kryvyi Rih National University, Kryvyi Rih, Ukraine, on May 19-21, 2021. It consists of an introduction, conference topics review, and some observations about the event and its future.
Research of the properties of quarry tuff-stone for complex processing
Authors: Malanchuk Zinovii , Zaiets Vitalii , Tyhonchuk Lesia , Moshchych Svitlana , Gayabazar Ganbileg , Dang Phuong Thao
Published: June 2021

This article focuses on the complex processing of quarry tuffs-stone to extract metals (iron, titanium, copper, silver, etc.) and obtain raw materials for construction and agriculture. The issue of tuff-stone softening was investigated and the analytical dependence of the regularity of tuff-stone softening at water saturation was established, which indicates that the saturation increases with increasing mass of the sample according to the logarithmic law, and the dehydration process occurs according to the parabolic law. Also in the course of researches the magnetic susceptibility of tuff-stone was defined, which depends on size of induction of a magnetic field. The magnetically sensitive part is up to 50% by weight of the sample, and the remaining silicate part at a magnetic field strength of 1.3 Tesla. Spectral analysis showed a high content of metals in the magnetically sensitive part of tuff-stone, which consists of iron (35-40%), titanium (2.5-4.0%) and copper in the silicate part (0.4-0.7%). It was found that the percentage of content representing commercial interest, and therefore it is appropriate complex processing.
Improving the methods for determining the promising boundaries of iron ore open pits
Authors: Lutsenko Serhii , Hryhoriev Yulian , Peregudov Volodymyr , Kuttybayev Aidar , Shampykova Asel
Published: June 2021

The article considers the determination of the final contours of the open pits. One of the problems of development of iron ore deposits at the present stage of development of opencast mining is described, which consists in the fact that in most open pits their working contours on the surface have reached final position. In these conditions, it is necessary to reevaluate the capabilities of the raw material base for further operation of mining enterprises. The analysis of scientific achievements in the decision of the final definition of the open pits` contours is executed. The well-known principle of determining the boundaries of opencast mining, the principle of which is to determine the boundaries based on a comparison of the allowable cost of ore production with the expected for the designed open pit. On the example of the open pits, which reflect the characteristic features of the development of steep-dipping deposits of Ukraine, the influence of current overburden ratio of the existing open pits on the economic overburden ratio, which serves as the main criterion in determining the boundaries of opencast mining for the designed open pits. A method for determining the boundaries of the open pits has been developed, which provides for the use of the economic overburden ratio of opening as a value not constant but variable over time, and one that depends on the change of current coefficients of opening in open pits-competitors. As a result, the theory in the field of determining the final contours of the open pits is improved. The new method differs from the known ones by taking into account the change in the economic overburden ratio over time, as well as determining the impact of technological indicators of open pits - competitors on the final depth of the designed open pit.
Application of roof bolting to reduce water inflow into mine workings during the crossing of tectonic faults
Authors: Krukovskyi Oleksandr , Krukovska Viktoriia , Vynohradov Yurii , Dyomin Vladimir
Published: June 2021

In this work, the problem of water inflow reduction in Ukrainian coal mines, which are distinguished by difficult hydrogeological conditions, was considered. A numerical study of the change in water inflow into a mine working when it crosses a tectonic fault was carried out. The cases when the permanent working was supported by frame supports and roof bolts were considered. The calculation of stress fields, zones with inelastic deformations and coefficients of permeability, which depend on the stress state and takes into account tectonic and natural permeability of the rocks, was performed. The results of calculating the water pressure and water inflow into the mine working in all considered cases are presented in the article. Analysis of the calculated data showed that a disturbed area, which covered water-bearing ricks, was formed in the roof of the mine working with the frame support. Within this area, water can move towards the contour of the mine working. The filtration permeability of the host rocks increases significantly when the mine face approaches the tectonic disturbance. The flow rate of water reaches critical values. The use of roof bolting restrains the unloading of the boundary rocks from the rock pressure and keeps them in a triaxially compressed stress state. The permeability value decreases by the value of its technological component. In different areas of the intersection of tectonic disturbance, the water inflow into the mine working with roof bolting is 3-8 times less than in the working, supported by frame supports. Therefore, the use of roof bolting allows not only to keep the mine working in a stable state, but also to significantly reduce water inflows at complicated hydrogeological conditions.
The price for sustainable development of renewable energy sector: the case of Ukraine
Authors: Sotnyk Iryna , Kurbatova Tetiana , Kubatko Oleksandr , Baranchenko Yevhen , Li Rui
Published: June 2021

While implementing state support mechanisms for renewable energy deployment, each country faces the problem of assessing and forecasting their consequences and must timely adjust their set to ensure sustainable energy development. The article estimates the price for sustainable development of the renewable energy sector on the example of Ukraine based on evaluating the effectiveness of the key mechanism of state support for the industry advancement - the feed-in tariff. The comparison of feed-in tariff rates with the LCOE indicators for the electricity generated from solar and wind power plants has shown that the current feed-in tariffs for two of the most popular renewable energy technologies are inflated several times and do not meet global trends in reducing the cost price of electricity generated by these technologies. The consequence of applying economically unreasonable tariffs is the annual over-expenditures of the state budget of Ukraine, which recently count hundreds of millions of euros. In the context of the country’s growing green energy generation, the conditions for further use of the feed-in tariff and the transition to other state support mechanisms are substantiated.
Application of fuzzy time series forecasting approach for predicting an enterprise net income level
Authors: Gorbatiuk Kateryna , Hryhoruk Pavlo , Proskurovych Oksana , Rizun Nina , Gargasas Audrius , Raupelienė Asta , Munjishvili Tea
Published: June 2021

To ensure the sustainable development of an enterprise, it is necessary to properly analyze the enterprise development, to ground the plans and management decisions on effective diagnostics and prediction of current and future economic situation at the enterprise. The article presents a study on the application of fuzzy time series forecasting methods. A new approach is applied to forecasting an enterprise's net income using a fuzzy technique. For testing the methodology, there were used statistical data on the enterprise net income level of the Ukrainian enterprise from 2002 to 2017. In the method of Stevenson and Potter, it is proposed to use as the universe of discourse, in the process of applying the method for all defined fuzzy sets, the intervals of variation of such indicator as growth rate. The same background as in Stevenson and Porter’s model is used in this article for forecasting the time series levels using the growth rates of the actual data as the universe of discourse. The forecasting results, obtained by this approach, are supposed to have more accuracy rate than other fuzzy time series models. Some modifications of this technique are proposed to obtain a higher accuracy rate and a point forecast one step forward.
Organizational and economic mechanisms of qualitative modeling of sustainable development of the enterprise
Authors: Maslak Olga , Grishko Natalya , Odintsov Mykhailo , Yakovenko Yaroslava , Buchashvili Khatuna
Published: June 2021

In modern conditions the successful operation of enterprises and maintaining the sustainability of their development depend on the adaptive model of strategic management of the enterprise. The development of such a model using traditional econometric approaches was proposed in the paper. It was suggested by the authors to take into account the prerequisites and specifics of operating activities using the method of PLS (Partial Least Squares), when it is possible to find several important (result) indicators out by the transition from the original set of features to the set of major components of a smaller dimension while maintaining causal relationships allows. The PLS-PM model of sustainable development of the mining enterprise as a complex economic system was done. The essence of latent variables and the relationship between them were identified and substantiated as well as the numerical modelling was performed using the methods of scientific generalization and abstraction.
The intergovernmental relations and their regulation in the context of decentralization of fiscal policy
Authors: Abuselidze George
Published: June 2021

The suspension of economic relations as a result of the global pandemic has severely affected the country’s peripheries. Unequal development of territorial units and overcoming socio-economic problems is the biggest challenge of any country. To address these challenges, the country needs to mobilize large amounts of finance and make optimal allocations. Intergovernmental relations play an important role in the effective implementation of the transformation of the country’s economic and political system. The aim of the paper is to study the characteristics of revenue mobilization and distribution between the levels of the fiscal system. There are developed some recommendations for improving inter-budgetary relations based on the experience of different countries. The recommendations proposed as a result of the research analysis can be used for both theoretical (for lecture) and practical (for legislative) purposes.
Is the hospital-park future of the sustainable hospital architecture?
Authors: Bulakh Irina , Didichenko Margaryta , Kozakova Olena , Chala Olena , Kovalska Gelena
Published: June 2021

The article deals with important issues of the ecological approach to the health care facilities design within the general world's attention to the problem of sustainable development of the urban environment. Taking as the example the innovative foreign experience of implemented projects of medical institutions, as well as design, competitive and conceptual proposals revealed the latest idea of coexistence and harmonization of natural and man-made worlds within the medical environment that meets the challenges and needs of the XXI century. It is the concept of the hospital-park, that synthetically combines the architectural environment, natural environment, as well as man-made oasis and creates the basis for emergent results both in the medical field and in the need for a neat attitude to our planet. The article reveals the possibilities of designing a hospital-park of different stories and in different initial conditions: in a dense urban environment with a minimum size of the construction site, in suburban and peripheral areas of the city.
Population structure and symbiotic relationships of the invasive speciesSinanodonta woodiana(Lea, 1834) in water bodies of Ukraine
Authors: Yermoshyna Tetiana , Pavliuchenko Оlesia
Published: June 2021

Understanding the process of penetration and distribution of the invasive speciesSinanodonta woodianais important for predicting associated changes in biodiversity and the structure of freshwater communities. The biomass, density, age and sex structure of mollusk populations were analyzed. An increase in the size of Chinese pond mussels was noted after the introduction: the shell length of individuals from a pond (Romanivka village, 2017) was 24,2% more than of mollusks from the Velyka Repida river (Matroska village, 2004), and in 2019 it increased by another 14,7% (by 42,5% compared to the shell length of the mollusks from the Velyka Repida river). The body weight ofS. woodianafrom the river was 125,3 g, while in the pond there was a 2,13-fold increase in body weight in 2017, with a further increase in this indicator by another 23,6% in 2019 and another 37,7% in 2020. The relative number ofS. woodianaand native speciesUnio pictorumandAnodonta anatinain 2017 was 26,3%, 47,4% and 26,3%, in 2020 – 64,0%, 16,0% and 20,0% respectively. Ciliates of the genusConchophthirusandTrichodina,Aspidogaster conchicola,Helobdella stagnalis, larvae ofChironomussp. are in a symbiotic relationship withS. woodiana. The most commonConchophthirussp. – in 21,6% of individuals. Further spread ofS. woodianato the cold regions of Ukraine and the formation of new populations in the already developed regions should be expected.
Long-term assessment, modeling and forecast of salinity conditions of reclaimed mine dumps of Western Donbass
Authors: Yevgrashkina Galina , Kharytonov Mykola , Klimkina Iryna , Shikula Elena
Published: June 2021

The neutralization of toxic mine rocks with additional of soil and loess like loam mass leads to a significant decreasing of salts migration at the contact zone. The mathematical model was working out follow general principle where mine rock is pollution source, but soil and loess like loam take place as volumetric filter for water-soluble salts. MathCAD file with commands for solving the problem forecasting the process of vertical salinization of reclaimed minelands was developed. The prospect for the numerical model using up to the most accepted range of values with experimental data shown. The irrigation of reclaimed minelands in the Western Donbass possible in the case of the dilution of the mine waters of aquifers with the Samara river water.
The formation of the leaf surface area and biomass of the miscanthus giganteus plants depending on the sewage sludge rate
Authors: Lopushniak Vasyl , Hrytsuliak Нalyna , Gumentyk Mykhailo , Kharytonov Mykola , Barchak Bazena , Jakubowski Tomasz
Published: June 2021

The case study to determine the peculiarities of Miscanthus giganteus aboveground biomass formation depending on sewage sludge and composts rate carried out in the Precarpathian region of Ivano- Frankivsk province on sod-podzolic soils. The largest area of the leaf surface of miscanthus is formed in the trials where fresh sewage sludge was applied in the rate of 20 - 40 t/ha. The leaf surface area increases from 19 up to 24.0 cm2/plant, and the yield of raw mass of plants at the level of 23.5 - 25.1 t/ha due to increasing rates of sewage sludge application. The highest indicators of net photosynthesis productivity were found in the period of intensive growth, which amounted to 7.78 g/m²/day and in the maturation period of 7.56 g/m²/day in the trial SS - 40 t/ha + N10P14K58. The amount of dry mass of miscanthus plants significantly depends on the height of the shoot and the leaf surface area of the plants. The use of compost based on sewage sludge and straw in a ratio of 3: 1 at a rate of 30 t/ha contributes to the dry weight of miscanthus plants at the level of 15 t/ha.
Cable-stayed coverings for large-span public buildings
Authors: Timchenko Radomir , Popov Stanislav , Krishko Dmitry , Rajeshwar Goodary , Aniskin Aleksej
Published: June 2021

Structural schemes of coverings using lightweight roof structure from modern composite materials are investigated in this paper. A comparison of two options for cable-stayed covering of a circus auditorium, one with an orthogonal mesh of cables (according to a standard design) and another one, with a mesh of cables formed by two groups of stabilizing cables are considered. The possibilities of reinforcement with composite material are analyzed. Calculation and preliminary selection of cable-stayed sections are also carried out and presented. The variations of the conditional volume with the relative sag arrows, for varying values of the coefficient qk have been investigated and shown on graphs. An optimization problem was solved and the optimal result with detailed calculations are proposed and presented in this research which enable the design of the cable-stayed coating with determination of its design characteristics. As a result, the optimum and most economical sections of the cable-stayed covering were obtained. The calculations also show the inexpediency of using a heavy roof structure for saddle cable-stayed coverings due to the exclusion of stabilizing cables from the operation with a large roof weight.
Ways to increase the production efficiency of hardwood blanks
Authors: Mazurchuk Serhiі , Marchenko Nataliya , Tsapko Yuriy , Bondarenko Olga , Buyskikh Nataliya , Andor Tomáš , Forosz Viktor
Published: June 2021

The article presents the main results of experimental studies on the identification of the main grade defects of oak lumber by the thermal non-destructive testing method. Regressional dependences of wood defects temperature display from the main factors for the studied grade defects are proposed. Indicators of infrared radiation (temperature range) of the main visible oak grade defects obtained as a result of experimental studies are presented. A conceptual scheme for the line control methods of identification of the main grade defects in lumber are proposed.
The assessment of the process of drawing a cylindrical workpiece without pressing with alternating strain of the workpiece flange
Authors: Arhat Roman , Shchetynin Viktor , Puzyr Ruslan , Savelov Dmitry , Haikova Tetiana
Published: June 2021

The development of a method for drawing cylindrical parts without pressing the workpiece flange, which allows reducing the cost of production due to the use of dies without a fit ring and single-acting presses. The performed research revealed that this method results in obtaining cylindrical parts with drawing ratios typical for pressing drawing. In this case, the different thickness of the finished product is several times less compared with the same type of semi-finished products obtained by drawing with a fit ring. Steel, aluminum and copper workpieces were researched. The best results were shown by more plastic materials. This method is not applicable for materials with the less than 0.25 mm thickness.
Investigation of resistance and air leakage of auxiliary ventilation ducting in underground mine in Quang ninh
Authors: Dang Phuong Thao , Malanchuk Zinovii , Zaiets Vitalii
Published: June 2021

Ventilation when driving roadways is one of the most important considerations in coal underground mines. Ventilation efficiency depends on fan performance and ventilation ducting system. In recent years in Vietnam, ducts have often been produced domestically. However, parameters of the duct as duct leakage, duct resistance for designing auxiliary ventilation system are referenced from abroad handbook. This lead to inaccurate design results and needs to adjust efficiency of auxiliary ventilation during driving roadways. Determination of duct resistance; air leakage in ducting system have been undertaken. The research result has been used to optimize the auxiliary ventilation system.
Research of the impact on the ecology of the state of cybersecurity of the critical infrastructure objects
Authors: Mokhor Volodymyr , Korchenko Oleksandr , Honchar Serhii , Komarov Maxsim , Onyskova Alla
Published: June 2021

The analysis of the impact on the ecology of the state of cybersecurity of critical infrastructure objects and the factors influencing the state of cybersecurity of the information system of the critical infrastructure object is performed. An explanation is given of why cybersecurity violations in automated process control systems can lead to consequences in the industrial sector and environmental impact. The need to develop effective and adequate proposals and measures for cybersecurity of information systems of the critical infrastructure objects is shown. The classification of assets that are the objects of cyberattacks by attackers and the categories of impact on the critical infrastructure objects are given. Approaches to determining the cyber threat risk factor of the critical infrastructure object and the relevance of threats are presented. The method of assessing the degree of possible damage from the implementation of information security threats is considered. The results of this analysis can be used to develop proposals and measures to avoid the effects of cyberattacks on the critical infrastructure objects. The prospect of further research is to develop a methodology for determining the relationship between specific cyberattacks and possible quantitative damage.
The influence of environmental tax rates on the Levelized cost of heat on the example of organic and biofuels boilers in Ukraine
Authors: Stanytsina Valentyna , Artemchuk Volodymyr , Bogoslavska Olga , Zinovieva Iryna , Ridei Nataliia
Published: June 2021

In December 2019, the European Commission officially presented The European Green Deal, a new EU economic development program aimed at achieving climate neutrality on the European continent by 2050. Many previous global, European, and national programs also aim to reduce emissions of pollutants into the atmosphere. In this context, one of the ways to reduce emissions is the development of alternative energy sources (in particular the wider use of biofuel boilers) and increasing environmental tax rates. When choosing the optimal heating boilers, the practice of using the levelized cost of heating (LCOH) indicator is common. Environmental pollution tax (as a component of LCOH) is calculated for the three most common types of boilers (for Ukrainian boiler houses) with a capacity of 4.65 to 58 MW, burning natural gas, coal, and fuel oil, as well as low-power boilers burning organic and biofuels, for existing environmental tax rates, for projected increasing in 4 times (according to the bill) and subject to the introduction of minimum and maximum rates in EU countries. It is established that at the current environmental tax rates in Ukraine there are almost no economic incentives for the introduction of technologies to reduce the concentration of pollutants in emissions, but increasing environmental tax rates may change this situation. This, in turn, once again suggests that changing environmental tax rates can be an effective tool for achieving sustainable development goals.
The region as an object of projecting of neo-spheric existence in the depth of anthroposphere
Authors: Samodryn Anatoly , Rybalko Lina , Lavrentieva Olena , Zukow Walery , Sarılgan Ali Emre
Published: June 2021

The article deals with the problem of the modern education system perfection and at the same time seeks to reach the limit of the possible in the transformation of the educational space to meet the demand of time, its ability to provide social consciousness in the conditions of the ongoing crisis and those changes that caused the intensification of the dialogue between Man and Nature. The development with the participation of humans becomes of a more targeted nature – noospheric and educational, global one. This is a new way obliges a modern general education institution to look for better approaches to the production of personality and promote the development of modern man – the carrier of new values. The state of society's consciousness should be inclined to act in the direction of its spirituality. The correlation between the social and morphological organization of a human being should not be beyond the problem of profile education. he human world to a large extent begins in a human being itself, therefore, the objective of this article is the search for ways to change the educational system of the region for the sake of further formation and development of the democratic society of the anthropospheric era.
Morphometric parameters based prioritization of a Mid-Himalayan watershed using fuzzy analytic hierarchy process
Authors: Joshi Mallika , Kumar Pankaj , Sarkar Purabi
Published: June 2021

Watershed prioritization has become increasingly crucial for managing natural resources, especially the watersheds. A useful decision support tool to provide appropriate weights to different morphological attributes with lineage with soil erosion is required to identify environmentally stressed areas for the watershed resources. This study examines the Western Nayar watershed delineation and further examination of the watershed’s morphometric parameters. The morphometric parameters were quantified under the linear, areal, and relief heads for the watershed. The prioritization of sub-watersheds was done by the fuzzy analytic hierarchy process (FAHP). The study included nine morphometric parameters for forming a pairwise comparison matrix. The fuzzy analytic hierarchy process was employed for assigning the suitable weights to morphometric parameters, and further, these weights are normalized to assign the final ranks to the sub-watershed. In Western Nayar, SW9 got the highest priority, and SW1 was categorized as the least priority. The results were validated by the consistency ratio index, which depends on the matrix consistency index’s size that should be less than 10%. The consistency index of the present study was found to be 2%.
Surface water quality of small rivers in the Ukrainian regions of right-bank Polissia
Authors: Gopchak Igor , Basiuk Tеtiana , Yatsyk Artem , Yaromenko Oksana
Published: June 2021

The quality of surface waters of small rivers of the Ukrainian regions of right-bank Polissia, belonging to the basin of the river Pripyat, was estimated. The study was conducted via systematic observations based on the ecological classification of surface water quality of land and estuaries of Ukraine, which includes a set of hydrophysical, hydrochemical, hydrobiological and other indicators, which were grouped into three blocks of indicators: salt composition of water; tropho-saprobiological (ecologicalsanitary) block; specific substances of toxic action. The integrated (ecological) index was determined, by which the class and category of surface water quality were established. The results of observations on the quality of surface waters of the rivers of the Ukrainian regions of right-bank Polissia indicate their satisfactory condition. Surface waters, on average, correspond to the II class of water quality, and the worst - to the III class. Water protection measures have been proposed to improve the ecological condition of small river basins in specified region.
Distribution of radionuclides in modern sediments of the rivers flowing into the Dnieper-Bug Estuary
Authors: Alokhina Tetiana , Gudzenko Vadym
Published: June 2021

The article presents the results of large-scale studies of the content and distribution of natural and man-made radionuclides in the sediments of the rivers flowing into the Dnieper-Bug estuary. The article also presents the results of the granulometric analysis of the surveyed water bodies. The data about natural radioactive elements in the sediments rivers flowing into the Dnieper-Bug estuary obtained in this research are demonstrated moderate specific activity, which, however, clearly correlates with the granulometric composition of sediments. The 137Cs determined by us is contained in the sediments of all studied water bodies and the places of it greatest concentration coincide with the areas in which the sediment is represented mainly by the pelitic fraction. The data obtained in this research can serve as a baseline data in natural radionuclides concentration in sediments rivers flowing into the Dnieper-Bug estuary. The obtained data can also be used for further monitoring of the specific activity of man-made radionuclides, in particular 137Cs.