bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparison of the effectiveness of temporomandibular joint osteoarthritis treatment with corticosteroids, hyaluronic acid, and platelet-rich plasma mono-therapy
Authors: Shynchukovskyi I. A. , Tereshchuk O. H. 
Published: July 2024

The prevalence of temporomandibular joint (TMJ) osteoarthritis is 18–85 % of all TMJ dysfunctional conditions. Most patients are elderly, especially women. Today, intra-articular injections are often used for treatment, so it is necessary to study the effectiveness of drug administration on the course of the disease. The number of studies on the effectiveness of certain drugs most commonly used to treat TMJ osteoarthritis is limited, that does not allow correct treatment planning in each individual case.
Aim: to evaluate the effectiveness of TMJ osteoarthritis treatment with monotherapy with hyaluronic acid, corticosteroids, and platelet-rich plasma.
Materials and methods. We included 90 patients who received intra-articular injections. Patients were randomly divided into 3 groups: group I, which received platelet-rich plasma (PRP, n = 30), group II, which received hyaluronic acid (HA, n = 30), group III, which received corticosteroids (CS, n = 30). To objectively evaluate the effectiveness of TMJ osteoarthritis treatment with monotherapy of hyaluronic acid, corticosteroids and platelet-rich plasma, the following indicators were used: filling in the visual analogue pain scale, maximum mouth opening (mm) and cortical plate density of the articular head of the mandible according to the Hounsfield scale using CBCT.
Results. PRP therapy demonstrated the highest efficacy in the form of monotherapy for all study parameters (p < 0.05). The fastest pain reduction was achieved with the use of corticosteroids (p < 0.05). In general, during the treatment period, the reduction of pain according to the visual analogue scale in group I was 85.71 %. In patients of group II (HA) and group III (CS) – by 71.42 %. Maximum mouth opening after treatment in group I increased by 24.32 %, in group II – by 15.79 %, in group III – by 18.92 %. The density of the articular head according to the Hounsfield scale after treatment in group I increased by 12.56 %, in group II – by 6.97 %, in group III – by 4.87 %.
Conclusions. All of the studied drugs demonstrated a positive effect on the treatment of TMJ osteoarthritis, but monotherapy with intra-articular PRP injections demonstrated the highest effectiveness according to the studied parameters (p < 0.05).
Ramification of Hall effects in a non-Newtonian model past an inclined microchannel with slip and convective boundary conditions
Authors: Roja Ajjanna , Saadeh Rania , Kumar Raman , Qazza Ahmad , Khan Umair , Ishak Anuar , Sherif El-Sayed M. , Pop Ioan 
Published: July 2024

Abstract
Many applications, including micro air vehicles, automotive, aerospace, refrigeration, mechanical–electromechanical systems, electronic device cooling, and micro heat exchanger systems, can be used to determine the heat flow in microchannels. Regarding engineering applications, heat flow optimization discusses the role of entropy production minimization. Therefore, this work explores new facets of entropy production in fully developed Carreau fluid heat transport in an inclined microchannel considering exponential space/temperature dependence, radiative heat flux, and Joule heating. The Carreau fluid model’s rheological properties are taken into account. Additionally, the influence of Hall slip velocity and convective boundary conditions is considered. Using appropriate transformation constraints, the governing equations are transformed into a system of ordinary differential equations, which are then numerically solved using the fourth- and fifth-order Runge–Kutta–Fehlberg method. Graphs illustrate a significant discussion of physical parameters on production of entropy, Bejan number, thermal field, and velocity. Our findings established that there is a dual impact of entropy generation for the exponential space/temperature-dependent, radiation parameter, Hall parameter, Weissenberg number, and velocity slip parameter. The Bejan number decreased with the Hall current and the Weissenberg number, and it enhanced with exponential space/temperature dependent. The convection constraint maximizes the entropy at the channel walls. The results are compared with exact solutions, which show excellent agreement.
Green hydrogen production in Uruguay: a techno-economic approach
Authors: Bouzas Betiana , Teliz Erika , Díaz Verónica 
Published: July 2024

Abstract
In 2015, the participants of the Paris Agreement collectively acknowledged the urgent need for immediate actions to decarbonize their national economies, with the aim of mitigating the adverse impacts of climate change. There is a call for policymakers to step up efforts to significantly reduce greenhouse gas (GHG) emissions in all economic sectors, with a focus on prioritizing options that can deliver substantial emission cuts. Some industry and transport subsectors present significant challenges in terms of technical and economic feasibility. Viable solutions for these sectors, known as “hard-to-abate” sectors, are limited. Green hydrogen has emerged as a promising alternative that is gaining increasing attention. It is poised to play a crucial role in transitioning towards a more sustainable future. There is a growing interest in green hydrogen among researchers, institutions, and nations, all committed to advancing its development, improving efficiency, and reducing costs. This paper explores the concept of green hydrogen, particularly its production processes that rely on renewable energy sources in Uruguay. It demonstrates the significant potential for green hydrogen production, facilitating the transition from fossil fuels to clean energy and promoting environmental sustainability through the widely accepted electrolysis process. Uruguay currently boasts a high percentage of renewable electricity generation (reaching 97 % in 2020). To support this further, there is a need to increase renewable energy capacity, which would impact the energy prices. The cost of energy accounts for more than 40 % of the levelized cost of hydrogen (LCOH) in all studied scenarios. Additionally, optimizing the costs associated with electrolysers, which can exceed 30 % of the LCOH in polymer electrolyte membrane (PEM) electrolysis, is crucial. This optimization is essential for positioning the country as a net exporter of green hydrogen. The range of LCOH values calculated in the different scenarios is between 2.11 USD/kg H2 and 4.12 USD/kg H2. According to updated specialized literature, achieving LCOH values under USD 1.4/kg H2 is essential for this goal.
Commodity Price and Indonesian Fiscal Policy: An SVAR Analysis with Non-Gaussian Errors
Authors: Mansur Alfan 
Published: July 2024

Abstract
This study exploits the non-Gaussianity for identification of a Bayesian SVAR model on newly unexplored monthly Indonesian data from 2007M1–2022M12, where we disentangle the commodity-related revenue from the total government revenues. Our main contribution is in labeling the statistically identified structural shocks as economic shocks by conducting a formal assessment of a set of proposed sign constraints. We simultaneously label a commodity price and three fiscal policy shocks, i.e. fiscal income tax, investment-spending, and consumption-spending shocks. Having evaluated their impacts, among the fiscal policy shocks, we find income tax shock the most impactful on output. Moreover, during the Covid crisis 2020–2021, the launched fiscal economic stimulus package (PEN program) positively contributed to the output. The recession of the Covid crisis could have deepened had the fiscal policymaker not responded at all. Albeit so, we should not overlook the contribution of the rising commodity prices to the output recovery. We also evaluate the commodity boom period in 2007–2009, the tax amnesty program in 2016–2017 and 2022, and the infrastructure spending boost in 2015. Our results suggest that output and retail sales would have been lower without the commodity price shock’s contribution during the commodity boom. Then, we find that tax amnesty and infrastructure spending boost policies contribute to higher retail sales.
Request for confirmation sequences in Mandarin Chinese
Authors: Li Xiaoting 
Published: July 2024

Abstract
As a social action, requesting confirmation involves presenting a proposition to be (dis)confirmed and seeking another’s (dis)confirmation of the proposition. This article provides an overview of the lexico-syntactic and prosodic resources used by participants to perform requests for confirmation (RfCs) and to respond to RfCs in Mandarin face-to-face interactions. Drawing on statistical results of the frequencies of a variety of linguistic resources in RfC sequences, this study shows that declaratives are the most frequently used syntactic forms for RfCs in the Mandarin data. Tags, such as shiba ‘right?’, are also frequently used by the speaker to seek (dis)confirmation from the recipient. The RfCs in the data also exhibit one prominent prosodic pattern. That is, a larger number of RfC turns in Mandarin end with falling pitch movement with very moderate slope from mid (M) to low (L). This prosodic pattern stems from the interplay between tones and intonation in Mandarin. In the responses to RfCs, a majority of them are confirmations. Also, response tokens, such as dui ‘right’ and en ‘en’ with falling intonation, are used highly frequently in responses to RfCs in the Mandarin data. Findings in this study afford cross-linguistic research on RfC sequences.
Possibility assessment for using protective coatings and polymer materials on tubing to prevent inorganic scaling on the inner surface of pipes
Authors: Berkov Denis V. , Kostyuk Ivan I. , Yudin Pavel E. , Verevkin Alexander G. 
Published: July 2024

AbstractThe inorganic scaling in wells is a common problem faced by mining companies. At present, the use of protective coatings for tubing as a measure to prevent or reduce the formation of inorganic scale deposits on pipe walls has not been fully studied. To use protective coatings as a measure to counteract the deposition of inorganic salts, it is necessary to develop a method that allows assessing the ability of coatings, as well as polymer and metal materials, to prevent the formation of inorganic scale deposits on the inner surface of pipes.The article proposes a method for assessing the ability of protective coatings to resist the inorganic scaling on the inner surface of tubing. The proposed assessment method allows to make an informed decision on the advisability of using internal protective coatings of tubing to prevent (or reduce) the formation of inorganic scale deposits. The authors consider design features of a test bench for assessing the resistance of coatings to inorganic scale deposits, which allows to simulate the conditions for the formation of scale deposits that are as close as possible to the real conditions of oil production facilities. The article presents the results of bench tests of nine coating samples, two polymer samples and one sample made of St 40G2 steel. To assess the effectiveness of using tubing with an internal anti-corrosion coating as a measure to combat scale deposits, additional research is required to assess the possibility of complex use of coatings in conjunction with other methods of preventing processes of inorganic scaling. Thus, the authors developed the Bench for assessing the resistance of protective coatings of tubing to inorganic scale deposits. A dynamic testing technique is proposed to evaluate the resistance of protective coatings to inorganic scale deposits. Based on the presented results, conclusions were drawn about the possibility of using protective coatings on tubing as a measure to prevent the formation of inorganic scale deposits on the inner surface of the tubing.
Construction of a model for matching user's linguistic structures to a chat-bot language model
Authors: Kryazhych Olha , Vasenko Oleksandr , Isak Liudmyla , Havrylov Ihor , Gren Yevhen 
Published: July 2024

The research object of this work is the linguistic structures of the user when constructing a request to a chatbot with generative artificial intelligence. The study solved the task of improving the communication mediation algorithms of chatbots through the comparison models of linguistic structures by users. Sometimes the user intentionally or due to lack of information forms an inaccurate request. Formally, this is described by logical operations "And" and "And or Not".
As a result of the research, a model was built comparing linguistic structures at the input with the information model of the response at the output. The model was based on an approach with recursive creation of an answer. That has made it possible to determine the basic characteristics of the object of the request and form an answer on this basis. Using this approach improved the accuracy of the chatbot response. It also made it possible to consider the linguistic structure of the user through its formalization. The use of logic algebra made it possible to find typical errors of users during dialogs with generative artificial intelligence.
A feature of the reported advancement is that the comparison of models of linguistic structures of query formation is carried out through a recurrent algorithm. As a result, it makes it possible to compare the query in such a way as to reduce the absolute error of the primary data by 0.02 % and simplify the process of mathematical calculations. At the same time, the received information becomes more accurate – the number of references increases from 2 to 6 sources.
The proposal could be used in practical activities to improve the natural language recognition technologies of users in chatbots with generative artificial intelligence. On this basis, it is possible to devise various applications and services for training and practical activities
Determining the influence of seasonal tilt angle on the efficiency of fixed solar photovoltaic modules
Authors: Golub Gennadii , Tsyvenkova Nataliya , Nadykto Volodymyr , Marus Oleh , Kepko Oleg , Omarov Ivan , Holubenko Anna , Shubenko Vladyslav , Zayets Maksym 
Published: July 2024

The object of this study is photovoltaic modules with different seasonal tilt angles at different geographical latitudes. The average annual efficiency of photovoltaic modules with different seasonal angles set at different geographical latitudes has been determined as the annual weighted average value of the cosine of the angle of incidence of solar rays on the plane of the photovoltaic module. The influence of seasonal tilt angles of photovoltaic modules at different geographical latitudes on their average annual efficiency was analyzed.
Approximate values of the seasonal tilt angles of photovoltaic modules at different geographic latitudes take values that differ from the geographic latitude value by plus 15° for the winter period and minus 15° for the summer period.
Modeling the average annual efficiency of photovoltaic modules depending on the seasonal tilt angles at different geographical latitudes made it possible to obtain refined values of the seasonal tilt angles of photovoltaic modules. Thus, at the latitude of 0°, 10°, 20°, 30°, 40°, 50°, and 60°, the tilt angle of photovoltaic modules for the winter period will be 14.8°, 24.6°, 34.5°. 44.4°, 54.1°, 63.6°, and 73°, respectively, and for summer ‒ minus 14.5°, minus 4.6°, 5°, 15.1°, 25.1°, 34.9°, and 44.7°. Dependences were obtained for determining the seasonal tilt angles of photovoltaic modules depending on the value of geographic latitude.
The difference in the average annual efficiency of photovoltaic modules, which are installed at seasonal angles, and photovoltaic modules, which track the position of the Sun in the vertical plane, is 0.4 %.
The results could be used as a basis for evaluating the efficiency of photovoltaic modules when determining the seasonal tilt angle at different geographic latitudes
Identifying the effect of low-cycle fatigue of reinforced concrete structures on the properties of the reducing coefficient under the action of a seismic type load
Authors: Abakanov Mirken , Dyussembayev Izim , Nigmetov Mermurat 
Published: July 2024

The object of consideration is seismic design, and the subject of the study is the determination of the reduction coefficient. One of the important problems of earthquake-resistant design is to determine the effect of low-cycle fatigue of reinforced concrete on the reduction coefficient and determine its optimal value. This problem is not disclosed and is not specifically taken into account in the standards for earthquake engineering when determining the maximum bearing capacity of types of structures due to the lack of study of the issue. To solve the problem, a series of experimental studies were carried out on low-cycle fatigue of reinforced concrete bending elements and frame units. The range of results of the reduction coefficient values and the degree of influence of monocyclic fatigue on the properties of the reduction coefficient are obtained.
A feature and characteristic of the results obtained is that the reduction coefficient Rμ depends on the nature of the hysteresis deformation pattern and the plastic life of structural elements estimated by the plasticity coefficient μ, which is significantly influenced by low-cycle fatigue manifested at peak accelerations of strong seismic impacts. The above test algorithm, the feature and characteristics of the results obtained made it possible to solve the problem under study.
The results obtained are accepted for practical use in the action of seismic loads: on the calculation of strength taking into account new low-cycle coefficients, reduction coefficients for determining the spectra of design reactions and seismic loads, taking into account energy absorption. New reduction coefficients are proposed for determining the spectra of calculated reactions and seismic loads
A qualitative and quantitative analysis of polyphenolic compounds in five Epilobium spp. with a possible potential to alleviate benign prostatic hyperplasia
Authors: Ain Raal , Kuiv Kristiina , Ilina Tetiana , Kovalyova Alla , Avidzba Yuliia , Koshovyi Oleh , Tõnu Püssa 
Published: July 2024

Benign prostatic hyperplasia (BPH) is a widespread male disease, affecting more than 50 % of men over the age of 60 years. Inhibition of the enzyme 5α-reductase is a common treatment strategy for this condition. Such potential can be found in willow flowers (Epilobium spp.), which are known in folk medicine for treating of prostate ailments, mainly benign prostatitis, hypertrophy and prostatitis. Smallflower hairy willowherb (E. parviflorum), which is rare, is the most recommended for treating BPH.
The aim. The aim of the study was to investigate the qualitative and quantitative content of polyphenols in five Epilobium species (E. adenocaulon Hausskn., E. hirsutum L., E. montanum L., E. parviflorum Schreb. and E. palustre L.) growing in Estonia, to find the most promising species in terms of chemical composition to alleviate BPH.
Materials and Methods. The qualitative and quantitative analyses of polyphenols in herbs of Epilobium spp. were performed using HPLC/MS. All five species were collected from the pond's shore in Pilkuse village (Otepää municipality, Valga county, Estonia) in July 2008.
Research results. It was found that 20 % ethanol was optimal for extracting polyphenolic compounds from the herb Epilobium spp. with subsequent UV chromatogram analysis at 350 nm. In the analyzed Epilobium species, 12 polyphenolic compounds were identified. Oenothein B, myricetin rhamnoside and myricetin glucoside were the principal polyphenolic compounds among other identified constituents in the Epilobium spp. herbs. E. montanum had the highest content of oenothein B. The highest was the total content of myricetin glycosides for all five compared species, the total content of quercetin glycosides was slightly lower, and the total content of kaempferol glycosides was the lowest.
Conclusions. The content of polyphenols is highest in E. adenocaulon and the lowest in E. parviflorum. Thus, E. parviflorum does not offer the best therapeutic potential for the to relief of BPH in terms of the quantitative content of polyphenolic compounds
Analysis of the essential oils in leaves and rhizomes with roots of angelica Archangelica growing in Ukraine
Authors: Slobodianiuk Liudmyla , Budniak Liliia , Marchyshyn Svitlana , Sakhatska Inna , Hlushchenko Olena , Horlachuk Nataliia , Tverdokhlib Ihor 
Published: July 2024

Essential oils, comprised of volatile compounds, have a wide range of biological effects, making them valuable in medicine, industry, and agriculture. They exhibit properties such as antimicrobial, anti-inflammatory, antiviral, antioxidant, anti-obesity, antidiabetic, and smooth muscle relaxation. In this aspect, plants belonging to the genus Angelica show promise. One of these essential oil plants is Angelica archangelica. There is insufficient information in the literature on the essential oils of the leaves and rhizomes with roots of Angelica archangelica.
The aim. The aim of our study was to identify and determine the quantitative content of essential oils by GC/MS method in Angelica archangelica leaves and rhizomes with roots grown in Ukraine.
Materials and methods. The determination of the essential oils composition of Angelica archangelica was conducted using Agilent Technologies 6890 chromatograph with mass spectrometric detector 5973 (Agilent Technologies, USA).
Results. The leaves of Angelica archangelica were found to contain twenty-three components in their essential oil, while the rhizomes and roots of this plant contained fifteen components. Eleven components were common to both parts of the plant, namely cis-Pinane, α-Farnesene, α-Curcumene, α-Caryophyllene, Copaen, β-Bisabolene, δ-Amorphene, α-Muurolene, trans-Chrysanthemal, β-Guaiene, α-Elemene. Twelve components such as α-Pinene, β-Myrcene, 3-p-Menthene, Isoborneol, Anisole, Bornyl acetate, (Z)-β-Elemene, Caryophyllene, (-)-Spathulenol, α-Bergamotene, γ-Muurolene, α-Bisabolol were present only in leaves, and four components namely p-Isopropenylacetophenone, β-Cubebene, α-Zingiberene, Hexahydrofarnesyl acetone were present only in rhizomes with roots.
Conclusions. The component composition of the essential oil in the leaves and the rhizomes with roots of Angelica archangelica growing in Ukraine was investigated using the GS/MC method. We have defined for the first time the chemical composition of the essential oils of the leaves of Angelica archangelica, 23 components of essential oil were identified. In the rhizomes with roots, 15 components of essential oils were identified. The following pharmacologically important components, cis-Pinane and α-Farnesene, were found in both samples of the essential oil of Angelica archangelica in significant quantities. These results have been cross-analyzed and are particularly important for planning and defining the process of cultivation and use of this species plant in traditional and official medicine