bluuebunny/crossref_metadata_2025_split huggingface dataset:
External removable elements of pipes for heat transfer enhancement (Design overview)
Authors: Mikulionok Ihor , Karvatskii Anton , Ivanenko Olena 
Published: December 2023

The subject of research is extrusion heads for forming smooth pipes from polymer materials.
Studies of the state of art and prospects of the development of the structural and technological design of extrusion heads for the formation of smooth polymer pipes is based on a critical analysis of scientific and technical sources of information and, above all, patent information of the leading countries of the world, since it is in the patent documentation that information is given about innovative developments in the relevant field of technology and technologies.
With the help of methods of analysis and synthesis, the designs of extrusion heads for the formation of smooth polymer pipes of various purposes for use in the chemical, petrochemical, oil refining, thermal energy, food and related industries were systematized. A thorough classification has been developed for each type of head, on the basis of which the most interesting designs proposed by scientists, designers and inventors from the leading countries of the world have been examined in detail. A critical assessment of most of the above constructions is provided, their advantages and disadvantages are discussed.
Designs of the heads were analyzed depending on the direction of the entrance of the melt to the head, the method of attaching the head to the extruder, the method of fixing the mandrel in the matrix, the number of possibilities of different flows of melts of different materials, the number of simultaneously extruded pipes, the movement of the elements of the head, the type of distribution channels, the possibility of maintaining the required temperature, the extruded pipes structure, the presence of channels for auxiliary substances, the possibility of adjusting the thickness of the pipe wall.
It is shown that, despite the considerable variety of designs of extrusion heads for forming smooth polymer pipes, the most demanded by the industry are straight pipe heads with a working channel of fixed geometry, which have been tested for a long time and are quite simple to manufacture and operate. However, thanks to the successes of materials science and computer modeling, the search for new designs of tubular extrusion heads continues.
Study of the effectiveness of inhibiting corrosion processes in mineralized water-oil environments
Authors: Kosmyna Mykola , Nosachova Yuliia 
Published: December 2023

Corrosion is a phenomenon that strongly affects many industries. Everything related to metallurgy, shipbuilding, or the oil industry is negatively affected by corrosion processes. This is a big problem, because the number of industrial accidents due to corrosion reaches more than 75%. Therefore, in this work, the effectiveness of inhibition of corrosion processes in mineralized water-oil environments was investigated in detail. The main goal of the article is to study the regularity of corrosion processes in water-oil media of different composition and at different temperature regimes for effective selection of the inhibition mechanism and type of corrosion inhibitor.
An effective method of reducing the impact of corrosion processes today is the use of inhibitors. This is expedient not only from the point of view of the effectiveness of the action, but also from the point of view of economic expediency. Inhibitors are added to corrosive environments in order to stop or reduce corrosion processes. They can be used as protective barriers that form a protective layer, and as absorbers that prevent oxidation processes. In the future, the type of inhibitor is selected depending on the type of metal and the conditions of the reactions responsible for the occurrence and course of corrosion.
Currently, the use of corrosion inhibitors is recognized as the most effective way to reduce the intensity of corrosion destruction of metal structures. At the same time, it is impossible to obtain a universal inhibitor that meets the requirements of high efficiency, manufacturability, toxicological safety, and at the same time is obtained in an economically feasible way. Among various corrosion inhibitors, organic ones have shown their effectiveness in protecting low-alloy steels of oil industry equipment.
Metal samples of St20 steel, the most widely used for the manufacture of oil pipelines and oil production equipment, were used as corroding materials in the study. The pH was changed by adding a solution of acetic acid. The degree of corrosion was determined by the massometric method. The volume of the test solution was 150 cm3, the pH of the solution was adjusted with a 5% acetic acid solution. Alkylimidozoline was used as an inhibitor.
Judging by the research results, the mineral composition of the aqueous solution largely affects the rate of corrosion. The presence of oil significantly reduces the rate of corrosion due to both blocking the access of oxygen to the system by the oil film and due to the corrosion inertness of the chemical components of the oil. However, it was also found that with an increase in the content of carboxylic acids, the presence of oil does not affect the corrosion rate in any way. Arguably, the alkylamidazoline inhibitor showed a high degree of protection at room temperature, in contrast to studies at high temperatures.
Clustering Provinsi di Indonesia Berdasarkan Indeks Pembangunan Teknologi Informasi dan Komunikasi Menggunakan K-Medoids
Authors: Mardhani Dwi Novianto  , Galang Sumantri  , Pusparani Puan Prihastuti  
Published: December 2023

Teknologi, Informasi, dan Komunikasi (TIK), saat ini berkembang pesat, namun dapat menyebabkan kesenjangan perkembangan teknologi antarwilayah. Penelitian ini bertujuan sebagai langkah awal untuk mengatasi permasalahan tersebut dengan mengelompokkan provinsi berdasarkan Indeks Pembangunan TIK menggunakan metode K-Medoids. Data yang digunakan adalah data Indeks Pembangunan TIK tahun 2021 dengan 3 variabel subindeks Pembangunan TIK. Clustering dilakukan pada rentang 2 s.d. 5 cluster dengan validasi menggunakan Davies Bouldin Index. Berdasarkan hasil penelitian, diperoleh 5 cluster optimal yaitu, cluster pertama (1 provinsi), cluster kedua (6 provinsi), cluster ketiga (13 provinsi), cluster keempat (8 provinsi), dan cluster kelima (6 provinsi). Beberapa provinsi di Indonesia tergolong sebagai cluster dengan Indeks Pembangunan TIK rendah dan sangat rendah. Oleh karena itu, pemerintah dapat memaksimalkan pembangunan TIK di seluruh provinsi untuk mengurangi kesenjangan perkembangan teknologi.
ANALYSIS OF THE MAIN APPROACHES TO THE ASSESSMENT OF THE CONDITION OF TPP AND NPP EQUIPMENT
Authors: Efimov Olexander , Tiutiunyk Larysa , Harkusha Tetyana , Sydorkin Igor , Vasyunin Dmytro 
Published: December 2023

The materials of the article analyze the current state of the energy industry in Ukraine and the countries of the world and analyze the ways to increase the efficiency of thermal power plants and nuclear power plants. The elements of the power unit can be affected by aging processes that occur over time or as a result of long-term use. The negative impact of aging can lead to the degradation of the element, namely to the deterioration of its reliability and, as a result, the safety of the power unit as a whole. The development and implementation of measures to mitigate aging processes and to ensure reliable operation of elements during the reassigned resource period is a mandatory type of activity for managing the aging of thermomechanical equipment and pipelines.Monitoring of the technical condition of the elements is performed by monitoring the established parameters and characteristics that determine the technical condition of the elements, during their operation, during tests, measurements, operational control of metal, repairs and maintenance of the elements. Monitoring should be carried out systematically throughout the entire life of the power unit. In turn, technical diagnostics monitors the current state of all elements, detects abnormal conditions, determines the causes of their appearance, which allows you to assess the situation and take measures to eliminate them. The purpose of the article is to analyze the main approaches to assessing the state of energy equipment of thermal and nuclear power plants.
STORAGE AND QUALITY CONTROL OF ALCOHOLIC BEVERAGES
Authors: Kudriavtseva Yuliia , Demydova Anastasiia , Piven Olena 
Published: December 2023

For the modern food industry, the key issues are quality control and product safety, as well as maintaining high quality products during storage. Dessert liqueurs are multicomponent liquids consisting of natural ingredients of various types – carbohydrates, proteins, phenolic compounds, contain minerals, tannins and pectins, organic acids, tannins, polysaccharides. These natural components are susceptible to oxidation, precipitation, and can lead to cloudiness in liqueurs. The problems associated with the storage of dessert liqueurs in Ukraine in order to study the most influential factors on the quality indicators of alcoholic beverages are analysed. The composition of dessert liqueurs plays a critical role in the formation of the finished drink. It is noted how various components influence the sensory characteristics and quality of the product, allowing the formation of an unsurpassed flavor profile of the liqueur. It is equally important to comply with all technological conditions in the production of liqueurs: production of semi-finished products, water preparation, compliance with temperature conditions, sterile containers. The factors influencing the stability of liqueurs are analysed. Thus, an increase in the content of extractive substances and the strength of drinks has a positive effect on the stability of liqueurs, including protection against cloudiness. The process of aging liqueurs is another criterion for obtaining the desired characteristics. It is noted that the duration and conditions of aging are of key importance for the formation of the unique taste and aroma of the drink. The formation of turbidity and sediment during storage of liqueurs was studied. The optimal temperature for storing liqueurs is above 12 ºС, but should not exceed (22–25 ºС); at lower temperatures there is a gradual deterioration in taste and aroma. It is considered that long-term storage of liqueurs is associated with the loss of bioactive substances, primarily antioxidants. The changes that occur in the finished drink during long-term storage are investigated, including the formation of biogenic amines and their impact on the quality of the product. The main factors influencing the quality and shelf life of drinks have been identified to formulate further ways to solve this problem.
The clinical efficacy of combined ESA and Roxadustat treatment for renal anemia in hemodialysis patients with secondary hyperparathyroidism
Authors: Wang Ming-li , Zheng Gao-feng , Li Ming-peng , Chen De-zheng , Zhong Jing-jing 
Published: December 2023

Abstract
Objective: To investigate the efficacy and safety of combined Roxadustat and erythropoiesis stimulator (ESA) treatment of renal anemia in hemodialysis patients with secondary hyperparathyroidism.
Methods: A retrospective analysis was conducted on hemodialysis patients with renal anemia and secondary hyperparathyroidism treated with ESAs alone, who were admitted to our hospital from March 2022 to December 2022. The patients were treated with Roxadustat combined with ESAs for 3 months, and the changes in Hb levels and laboratory related indicators before and after the combined treatment were analyzed.
Results: The results showed that a total of 21 patients received combination therapy, with a significant increase in Hb compared to ESAs alone (t=-5.32, P<0.001). The Hb qualification rate was 33.33%, and the ∆Hb response rate was 71.43%; The parathyroid hormone significantly decreased, with a statistically significant difference (Z=-2.033b, P<0.05); Hemoglobin (RBC) and Total iron binding capacity (TIBC) were significantly increased compared to ESAs alone; Total cholesterol (TC) and Low-density lipoprotein (L-DLC) were significantly lower than ESAs alone, and High-density lipoprotein (H-DLC) was slightly lower than ESAs alone; The differences in the changes in the above indicators were statistically significant (P<0.05). There was no statistically significant difference in changes in other laboratory related indicators (P>0.05). No adverse reactions were observed during the combined treatment of 21 patients.
Conclusion: The combination of Roxadustat and ESAs can effectively improve renal anemia in hemodialysis patients with secondary hyperparathyroidism, as well as improve indicators of hyperparathyroidism and blood lipid levels with high levels of safety. This combined treatment thus provides a new and safe treatment method for these patients.
Heavy metal application of response surface optimized-lipopeptide biosurfactant produced by Pseudomonas aeruginosa strain CGA-02 in low-cost substrate
Authors: Anaukwu Chikodili Gladys , Ekwealor Chito Clare , Anakwenze Vivian Nonyelum , Orji Chinedu Christian , Ogbukagu Chioma Maureen , Anyaoha Victoria Ihedinachi , Isiaka Amarachukwu Bernaldine , Green Stefan , Ekwealor Ikechukwu Amechi 
Published: December 2023

Abstract

Cost-effective methods of biosurfactant production with minimal environmental impact are needed as global demand continues to increase. This study evaluated lipopeptide biosurfactant production in a Pseudomonas aeruginosa strain CGA-02 using a low-cost carbon substrate. Structural properties of the biosurfactant and applicability of the biosurfactant in heavy metal removal were evaluated. Response surface methodology (RSM) involving central composite design (CCD) was used to optimize process parameters to maximize biosurfactant production. The study identified sugar cane molasses and sodium nitrate as carbon and nitrogen sources of choice for bacterial growth and biosurfactant production, with a relatively 2.64-fold increase in biosurfactant yield under optimized conditions. Analysis of the biosurfactant measured a surface tension reduction of water from 72.2 ± 0.26 mN/m to 30.5 ± 0.2 mN/m at 40mg/L critical micelle concentration. GC-MS and FTIR analysis revealed structural properties of the lipopeptide biosurfactant, with fatty acid components predominantly 9-octadecenoic acid (oleic acid), n-hexadecanoic acid, cyclotetrasiloxane and trimyristin, and infrared peaks belonging to amine, carboxyl, nitrile, alkanol, ether and carbonyl groups. Capture of heavy metals using the biosurfactant was evaluated in soil microcosms. Removal rates of 80.47%, 100%, 77.57%, 100%, 97.57% were recorded for As, Pb, Hg, Cd and Cr respectively after 12 weeks incubation. There was no significant difference (p < 0.05) in the removal efficiency of the biosurfactant and an analogous chemical surfactant, sodium dodecyl sulphate. First and second order kinetic models described heavy metal removal rates by the biosurfactant. We demonstrate the production of a useful biosurfactant using low cost waste carbon.
The complete chloroplast genome, DNA barcoding, and taxonomic notes of Swertiabanzragczii and Swertia marginata (Gentianaceae) in Mongolia
Authors: Oyuntsetseg Dashzeveg , Nyamgerel Nudkhuu , Baasanmunkh Shukherdorj , Oyuntsetseg Batlai , Urgamal Magsar , Yoon Jung Won , Bayarmaa Gun-Aajav , CHOI Hyeok Jae 
Published: December 2023

Abstract
Background
Swertia banzragczii and S. marginata are important medicinal species in Mongolia. However, their taxonomic positions and genetic backgrounds remain unknown. In this study, we explored the complete chloroplast genomes and morphological features of these species and compared them with those of closely related species within the subgenus to determine their taxonomic positions and phylogenetic relationships.
Result
The chloroplast genomes of S. banzragczii and S. marginata encoded 114 genes, including 80 protein-coding genes, 30 tRNA genes, and 4 rRNA genes. Among them, 16 genes contained a single intron, and 2 genes had two introns. Closely related species had a conserved genome structure and gene content. Only differences in genome length were noticed, which were caused by the expansion and contraction of the inverted repeat (IR) region and loss of exons in some genes. The trnH-UUU–psbA and trnD-GUC–trnY-GUA intergenic regions had high genetic diversity within Swertia plastomes and could be used as barcoding markers. Overall, S. banzragczii and S. marginata are true species and belong to the subgenus Swertia.
Conclusions
These results provide valuable genetic and morphological information on rare and subendemic Swertia species in Mongolia, which can be used for further advanced studies on the Swertia genus.
A Multi-Edge Jointly Offloading Method Considering Group Cooperation Topology Features in Edge Computing Networks
Authors: Lyu Zengwei , Li Pengfei , Wei Zhenchun , Fan Yuqi , Xu Juan , Shi Lei 
Published: December 2023

Abstract

Mobile Edge Computing (MEC) is a new computing paradigm that has shown great potential. How to extract the cooperative topological relationship between MEC servers to realize joint computing is the key problem to solve the bottleneck of MEC computational capability. In previous studies, multi-MEC servers are often regarded as homogeneous nodes to jointly schedule computing offloading tasks, without considering the hierarchical and clustered topology of the server collaborative work. As a result, in the scenario of unbalanced distribution of computing resources, it is difficult to obtain the optimal joint scheduling strategy for offloading tasks according to the cooperation relationship and resource differences among MEC servers. Therefore, this paper considers introducing the topological relationship of group cooperation among multi-MEC servers to optimize the joint scheduling strategy, and proposes a Multi-Agent Hierarchical Graph Attention Soft Actor-Critic algorithm (MHSAC). Firstly, based on the differences in their own resources and the demands of the tasks they undertake, MEC servers are divided into series clusters. Then, a Hierarchical Graph Attention Network (HGAT) is used to model each agent to extract the physical communication topology information of the MEC server and the group topology information of multi-edge cooperation. The multi-agent soft Actor-Critic algorithm is used to obtain the offloading scheduling decision of multi-edge cooperation. Experiments show that the proposed MHSAC algorithm that considering the topological relationship of multi-edge group cooperation can optimize cluster load distribution under low latency and resource-limited requirements, achieving optimal load balancing values and task drop rates.
Parameterized model for trace-element partitioning between apatite and silicate melt: effect of apatite/melt composition and temperature with implications for lunar basalts
Authors: Jirků Markéta , Špillar Václav , Fabbrizio Alessandro 
Published: December 2023

Abstract

We present new parameterized lattice strain models to predict the apatite/silicate melt partition coefficients of the rare earth elements (REE) and Y in natural magmatic systems as a function of temperature and melt composition with high accuracy and precision. We collected published experimental REE and Y partition coefficients for apatite coexisting with melt ranging from picrobasaltic to rhyolitic and phonolitic composition. Resulting dataset was analysed using the lattice strain model to assess the data quality. The three lattice strain parameters (D0, r0, and E) were subjected to a multivariate nonlinear least-squares analysis as a function of intensive variables, and we attempted to develop two independent models, on the basis of melt and apatite composition. In melt composition-based model, it was found that the D0 parameter increases with increasing melt polymerization as a proxy of which we have chosen the melt CaO. The D0 parameter is thus best expressed as a power law function of melt CaO. Through extensive search of the parameter space, the E and r0 variables were found to correlate strongly with linear combination of melt CaO, P2O5 and of reciprocal temperature, 1/T. Based on the apatite composition, we could not find any dependence of the partitioning parameters on compositional variables that would outperform solely a reciprocal temperature-based fit. The new parameterization was applied to predict REE and Y partition coefficients in lunar basalts and suggests that lunar apatite could only equilibrate with evolved melt at late stages of fractional crystallization.
Anthracnose changes the diversity and composition of rhizosphere soil microbial community in common vetch
Authors: Wang Qiong , Zhu Rui , Li Faxi , Li Yingde , Bai Meiting , Duan Tingyu 
Published: December 2023

Abstract

Anthracnose caused by Colletotrichum is an increasingly severe disease of common vetch that reduces plant yield and quality. In this study, the effects of anthracnose on the rhizosphere soil microbial community of common vetch were studied via high-throughput sequencing. The relationship among the rhizosphere soil microbes and soil properties were analyzed. Lower fungal diversity was observed in rhizosphere soils of diseased plants. Variations in relative abundance were observed in the fungal phyla Mortierellomycota and Glomeromycota and in the bacterial phyla Acidobacteria, Oxyphotobacteria, and Verrucomicrobia. Gammaproteobacteria and Deltaproteobacteria were significantly more abundant in the rhizosphere soil of healthy plant. The bacterial community in the rhizosphere soil of diseased plant was involved in the synthesis of amino acids (glycine, serine, threonine, alanine, aspartate, and glutamate). Results of a redundancy analysis (RDA) showed that Colletotrichum was negatively correlated with soil available potassium (AK) and the content of soil organic matter (SOC), however it was positively correlated with soil pH. The relative abundances of Bacillus showed a negative correlation with soil pH and a positive correlation with AK and SOC content. The present study demonstrated that anthracnose could affect the rhizosphere soil microbial communities in common vetch, and soil properties have a close relationship with the rhizosphere soil microbes of common vetch.
Breast Cancer Comorbidities Network Analysis: Break the Code with Optimum Community Detection Algorithms
Authors: Permana Angga A. , Yaputra Reynard M. 
Published: December 2023

Abstract
Breast cancer is a prominent global health concern, as the data from the International Agency for Research on Cancer (IARC) shows that breast cancer is the leading cancer type with new cases in 2020 and among the Top 5 cancer types with the most deaths. This research aims to discover the breast cancer comorbidity diseases community with community detection algorithms, evaluate them based on modularity and similarity, suggest the best semantic similarity measurement and the optimal threshold value, and validate the data of breast cancer comorbidities with several data from research papers. The Wang algorithm, with a threshold value of 0.5, is chosen to build the network. Leiden, Louvain, RBER Pots, RB Pots, and Walktrap are the best five community detection algorithms. Similarity measurements with the best three fitness functions (edges inside, scaled density, and size) suggest that the Leiden-Louvain algorithm and RBER Pots-RB Pots algorithm are two pairs of algorithms with similar results. Other similarity measurements with the V-measure heatmap suggest that Louvain-Leiden (0.99), RB Pots-Leiden (0.97), and RB Pots-RBER Pots (0.96) results are similar. Comorbidity is then evaluated using the best five community detection algorithms and four centrality algorithms. As a result, fourteen diseases are agreed upon by the best five community detection algorithms, five diseases are agreed upon by four algorithms, two diseases are agreed upon by three algorithms, a disease is agreed upon by two algorithms, and ten diseases are agreed upon by an algorithm.