bluuebunny/crossref_metadata_2025_split huggingface dataset:
Vacuum plasma erosion resistant 2D nanocomposite coating Avinit for compressor blades of gas turbine engines of aircraft engines
Authors: Sagalovych Oleksiy , Popov Viktor , Kononyhin Oleksandr , Sagalovych Vladislav , Dudnik Stanislav , Prokopenko Oleksandr 
Published: September 2023

The work is devoted to the search for new vacuum-plasma coatings with high hardness to increase the durability of the compressor blades of the GTE of aircraft engines
Ti-Al-N-based vacuum-plasma coatings obtained by Avinit technologies, which ensure the application of hard, high-quality coatings with dramatically reduced micro-arc damage, were selected as candidates.
Avinit multilayer coatings have higher functional characteristics than TiN (microhardness, crack resistance, temperature resistance, erosion and corrosion resistance) and may be promising for applying erosion-resistant coatings for compressor blades. Avinit technologies are technologically closest to the vacuum-plasma technologies used in industrial production for applying TiN protective coatings.
New multi-layered 2D nanocomposite wear-resistant ion-plasma hard coatings Avinit (TiN-AlN)n have been developed.
The created software products made it possible to reach a qualitatively new level in terms of further modification and improvement of the designs of Avinit functional coatings, stability of technologies and improvement of their quality control when applying such coatings for use in the production of compressor blades of gas turbine engines of aircraft engines.
Special attention is paid to methods of preliminary ion-plasma treatment of surfaces before coating. Metallographic studies of the chemical and phase composition and structure of Avinit (TiN-AlN)n coatings have been carried out. The thickness of the coatings is 7-9 μm, the microhardness is 34-35 GPa (compared to the serially used TiN coating: 27.4 GPa). The use of three-stage ion-plasma treatment in Avinit technologies using a double vacuum-arc discharge followed by the application of strengthening coatings in a single technological cycle eliminates the formation of cracks and ensures the production of tightly bonded, high-quality coatings of a given composition with the maximally reduced share of the droplet component.
The developed coatings (TiN-AlN)n were applied to experimental batches of working compressor blades of GTE aircraft engines for bench tests.
Study of linear and angular oscillations of the moving platform of the ground robotic complex
Authors: Strutynskyi Sergiy , Semenchuk Roman 
Published: September 2023

Background
Modern ground robotic complexes have a significant speed, which leads to the occurrence of vibrations of the platform and the manipulator. The problem is to develop highly efficient vehicles that take into account dynamic processes, and their impact is minimized by constructive solutions and dampers.

Objective
The purpose of the work is to study the dynamics of the moving platform of the robotic complex and establish its dynamic parameters. At the same time, it is necessary to determine the characteristics of oscillatory processes, in particular, linear and cross-angular movements of the platform.
Methods
A dynamic model of the platform has been developed. It has three degrees of freedom and takes into account the working processes of caterpillars and rollers. The calculation scheme has six points of support on the surface. The method is based on finding the position of the rollers determined by the profile of the road surface.
The elastic-dissipative properties of the track and the surface are taken into account in the model. A research of the platform during its movement on a surface with a complex profile was carried out. Polyharmonic dependencies with random parameters are used to describe it.
Results
The developed model determine the dynamic characteristics of the robotic platform during its interaction with irregularities of arbitrary shape. Based on the found equations of spherical motion, mathematical modeling of work processes was carried out, angular coordinates and angular speeds of platform rotation were determined.
Conclusions
The results of modeling the spherical movement of the platform correspond to the physical essence of work processes. These data are necessary for studying the dynamics of the manipulator of the mobile robotic complex. Minimization of platform oscillations improves the characteristics of ground robotic complexes moving at a high speed.
Ensuring the supply of current to one end of the cable with different wire rope parameters
Authors: Belmas Ivan , Bilous Olena , Tansura Hanna , Shvachka Angelina 
Published: September 2023

Issues. Structural cable monitoring systems are widely used to diagnose the condition of cable-stayed bridges. Known methods of non-destructive control of the stressed state cannot in some cases be fully used, or their use is difficult and economically impractical or inefficient.
The aim of the study. A model is offered that allows you to ensure the reliability of the rope with many degrees of damage.
Method. The most convenient method for monitoring the mechanical parameters of cable ropes is the electrical resistance method.
The results. The results of the dependence of the stress and current distribution on the rope parameters are presented. The researched method will increase the reliability, safety and service life of cable-stayed bridges.
Scientific novelty. Our work consists in studying the impact of breaking the cables that make up cable ropes. For this, a model was created that allows you to combine several parameters (specific resistance and electrical conductivity, length, number of cables). We considered the case for removing the signal from one end of the cable.
Practical significance. It is established that when changing the length of the resistance application and the number of cables, a change in the graph for the undamaged and damaged cable is displayed. The number and row in which the burst occurred were analyzed. In this way, the system that monitors one cable notifies about destruction and makes it possible to prevent it.
Polyhydroxyalkanoates: Biosynthesis Optimization and Design of Antimicrobial Composites
Authors: Koretska Nataliia , Semeniuk Ihor , Pokynbroda Tetyana , Shcheglova Nataliia , Karpenko Olena , Kytsya Andriy , Lubenets Vira , Polish Nataliia 
Published: September 2023

Background. The accumulation of plastic waste negatively affects the environment and human health. Currently, one of the strategies to address this global ecological problem involves the utilization of biodegradable plastics instead in place of synthetic ones. Among them, polyhydroxyalkanoates (PHA) – microbial intracellular polymers – hold a significant position. Their advantages are biodegradability, biocompatibility, and favorable thermomechanical properties. Given these attributes, PHA has significant prospects for use in medicine, agriculture, and the food industry, in particular for packaging food products.
Objective. Enchance the efficiency of bacterial synthesis of polyhydroxyalkanoates through nutrient media modification, obtain antimicrobial composites based on PHA, and determine their antimicrobial properties.
Methods. The optimization of PHA biosynthesis involved selecting appropriate cultivation conditions, including carbon and nitrogen sources, cultivation time, and working volume. The isolation of PHA from bacterial biomass was achieved through chloroform extraction (mixing for 10 h at 35 °C, with a biomass-to-chloroform ratio of 1:50); followed by precipitation with double the volume of isopropanol. The resulting polymer was then dried to a constant weight at 60 °C. The hydrophobicity of the biopolymer was assessed using the water contact angle measurement. Composites of biopolymers with antimicrobials in the form of films were obtained using two methods: 1) solution casting method; and 2) layering the biocides onto the polymer film. The antimicrobial activity of the resulting composites was determined using the agar diffusion method.
Results. Through the optimization of the mineral media and the change of cultivation conditions, it was possible to obtain 0.26–1.45 g/l of polyhydroxyalkanoates (5.1–34.0% PHA from biomass). The R. ruber UCM Ac-288 strain synthesized the maximum amount of biopolymer (34.0% PHA). This study established the ability of Gordonia bacteria to synthesize PHA for the first time. PHA compositions of optimal content were obtained, with hydrophobicity comparable to that of polyethylene packaging films. Antimicrobial pro­perties of biopolymers composites with biocides have been substantiated.
Conclusions. The bacterial synthesis of PHA was increased by modifying nutrient media. Composites based on PHA with biocides were developed. It was determined that these composites exhibit antimicrobial properties and high hydrophobicity. Consequently, they hold promise for use as biofilms for packaging and preser­ving food products.
CONCEPTUAL FOUNDATIONS OF DISCRETE-CONTINUOUS STRENGTHENING OF ENGINE AND TURBO-EXPANDER COMPONENTS
Authors: Tkachuk M. M. , Grabovskiy A. , Tkachuk M. А. , Marchenko А. , Kravchenko S. 
Published: September 2023

The article focuses on design and technological measures aimed at ensuring improved technological characteristics of engines and turboexpander units. In particular, an improved concept of the technology of discrete-continuous strengthening of structural elements has been developed. This concept combines design and technological measures in a single technical solution. This expanded parameter space ensures greater efficiency of the final synthesised solution. For example, by analysing the stress-strain state of a representative fragment of contacting structural parts, the regularities of the influence of design and technological parameters on strength characteristics are determined: sets of parameters that provide increased strength of contacting parts and their durability are substantiated. Friction in the mating of parts is also reduced. In addition, the efficiency of the mechanism, which includes the contacting parts subjected to hardening, increases. The result is an increase in the technological characteristics of engines, turbo-expander units and other machines whose parts are subjected to discrete-continuous hardening. In general, the developed concept is aimed at a major enhancement of the service characteristics of structural elements. This is stated in the objective functions. These objective functions are minimized or maximized in the extended parametric space. A parametric model of the stress-strain state of a fragment of discrete-continuous reinforced bodies is created. This model makes it possible to study the impact of project and technological parameters and tribomechanical properties of contacting bodies. By purposefully varying the properties of materials, the shape and size of the zones of discrete and continuous strengthening, it is possible to achieve increased tribomechanical characteristics of a pair of contacting bodies.
Long-term survival outcomes of drug-eluting bead transarterial chemoembolization in patients with hepatocellular carcinoma in Vietnam
Authors: Binh Mai Thanh , Thai Nguyen Van , Giang Dinh Truong , Manh Nguyen Van , Tuyet Tran Thi Anh , Tuan Nguyen Anh , Trang Nguyen Thi Huyen , Thinh Nguyen Tien , Bang Mai Hong 
Published: September 2023

Abstract
Aim
To evaluate the efficacy of drug-eluting bead transarterial chemoembolization (DEB-TACE) and determined prognostic factors affecting patients with HCC.
Methods
A total of 477 Vietnamese patients diagnosed with HCC underwent DEB-TACE. Patient survival was assessed using the Kaplan–Meier method, and prognostic factors affecting survival were assessed using log-rank tests and Cox proportional hazards regression.
Results
Among the 477 patients (437 males, mean age 61.1 ± 11.7 years) who underwent DEB-TACE, the median clinical follow-up was 25.3 (1–63) months. Treated response according to the Modified RECIST in patients followed up beyond 6 months included a complete response (CR) in 41 patients (8.7%), partial response (PR) in 352 (74.9%), stable disease (SD) and progressive disease (PD) in 77 (16.1%). The median overall survival (OS) was 53 ± 1.1 months. Factors associated with longer OS included ECOG ≤ 1, Child-Pugh A, BCLC stage A/B, ALBI grade I, and tumor response (CR/PR). In multivariate analysis, Child-Pugh A and objective tumor response (CR/PR) were predictors of longer OS.
Conclusion
DEB-TACE was an effective treatment for HCC. Child-Pugh A before TACE and tumor response (CR/PR) were positive prognostic factors.
DNA Images of Codes Over F4t [u]/&lt;uk&gt;
Authors: Sezer Tugce , Yaraneri Ergün 
Published: September 2023

Abstract
The aim of this paper is to study DNA codes using some Gray images of codes over the chain rings S = F4t [u]<uk > and R = F4[v]⁄<vtk>. The special cases t=1 and k=2,3 were studied before. We construct some nice Gray maps from R, S to DNA codewords, whose images satisfy complement and reversibility properties. Studying the general case allows us to construct codes with better parameters. Subsequently, we concentrate on codes over arbitrary commutative rings and cyclic codes over R and obtain some necessary and sufficient conditions equal to the common constraints on DNA codes, like reversibility. Moreover, a variety of sample codes over multiple rings are presented.
MSC Classification: 11T71 , 94B05 , 94B15
Management of Mexican bean beetle, Zabrotes subfasciatus (Boheman) (Coleoptera: Chrysomelidae), with botanical powders and oils in common bean (Phaseolus vulgaris L.)
Authors: Damena Kalkidan , Goftishu Muluken , Fite Tarekegn 
Published: September 2023

Abstract
Common bean (Phaseolus vulgaris L.) is an essential crop for food security and nutrition, mainly for Sub-Saharan African smallholder farmers. However, the production and productivity of common bean is mainly constrained by Mexican bean beetles, Zabrotes subfasciatus (Boheman). Thus, the objectives of this study were to evaluate the effectiveness of plant seed powders of neem, Hochst and wild marigold, leaf powders of sweet fennel and broad-leaved croton, plant essential oils of neem and Hochst and African cabbage edible oil at different rates against Z. subfasciatus. All parameters at all botanical seed and leaf powder rates showed a significant difference over the untreated control, except for seed damage at 5 g leaf powders of sweet fennel and broad-leaved croton. Neem, wild marigold, and Hochst at the rates of 5, 10, and 15 g/150 g, sweet fennel at 10 and 15 g/150 g and broad-leaved croton at 15 g/150 g resulted in 96 – 100% seed protection, reduced emergence of F1 progeny, seed damage, and seed weight loss and were statistically at par with primphos-methyl. All tested botanical powders recorded 87 – 100% germination. The botanical oils and mustard cooking oil at rates of 0.5, 1.5, and 3 mL per 150 g common bean produced adult beetle mortality in the range of 93 – 100% and seed protection of 99 – 100%. Thus, smallholder farmers can use any of the above indicated botanical powders or oils for postharvest storage depending on their availability against Z. subfasciatus. Further research on botanical powders and oils under farmers’ storage conditions is important.
Graves’ orbitopathy development in thyroid cancer patients: A 16-year nationwide cohort study in South Korea
Authors: Lee Jeong Kyu , Kim Minjeong , Lee Jooyoung , Hwang Yu Been , Kang Jinmo , Ahn Hwa Young 
Published: September 2023

Abstract

Background/Objectives:
Thyroid cancer patients, without history of hyperthyroid condition, suffer from Graves’ orbitopathy (GO). We investigated its incidence, possible risk factors and prognosis.
Subjects/Methods:
This study is a retrospective cohort study that analyzes medical records of 1,137,861 South Korean patients from 2002 to 2019. Those whom without hyperthyroidism or GO prior to thyroid cancer diagnosis were included. We investigated 8,499 individuals and compared the type of surgery, dose of radioactive iodine (RAI) and daily average thyroid hormone between GO group and non-GO group. In addition, each GO patient’s medical records were analyzed, and the course of disease and the type of treatment was described.
Results
Among 8,499 cancer patients, 7,836 cases received a thyroidectomy, and 12 were diagnosed with GO after surgery. None of the remaining 663 cases received a GO diagnosis. In addition, the GO group indicated a significantly higher total RAI dose average than the non-GO group (p = 0.036). Within the GO group, the approximate time from thyroid cancer diagnosis to GO occurrence was 460.5 (331.0-984.8) days. Five patients underwent RAI therapy before GO diagnosis. Of these, four expressed GO within a year post-RAI therapy, and the total iodine dose before GO was 168.5 (139.8-203.8) mCi. The average daily thyroid hormone dose before GO was 85 (70–120) µg. One case required intravenous and oral steroids
Conclusions
Although GO rarely develops in thyroid cancer patients without coexisting hyperthyroidism, the total RAI dose may increase its risk. Further study regarding its pathogenesis would help clarify GO’s association with thyroid cancer.
The significance of Mongolian spots for primary screening of Mucopolysaccharidosis
Authors: Mao Shao-Jia , Zu Yu-Mei , Yuan Tian-Ming , Zou Chaochun 
Published: September 2023

Abstract
Background
To explore the significance of Mongolian spots for the primary screening of mucopolysaccharidosis (MPS).
Method
In this study, the incidence, size, number, distribution, and regression of Mongolian spots in 225 patients diagnosed with MPS in China followed between 2020 and 2021 were retrospectively investigated, and compared with those in 209 normal newborns.
Results
The diagnostic age ranged from 0 to 32 years old with a median diagnostic age was 3 years old. Although the total incidence of MPS patients with Mongolian spots (73.78%) was higher than that in normal newborns (66.51%), there was no statistical significance. The incidence of Mongolian spots ≥ 2 or ≥ 5 in MPS group was significantly higher than that in control group (P < 0.001). The average number of Mongolian spots in MPS patients at least greater than or equal to (2.84 ± 2.47) was higher than that in normal newborns (1.09 ± 1.33) with a significant difference (P < 0.001). The age of diagnosis with less than 2 Mongolian spots (median diagnostic age = 4.00) was later than with greater than or equal to 2 Mongolian spots (median diagnostic age = 3.00) in MPS group (z=-3.103, P = 0.002). The age of diagnosis with less than 5 Mongolian spots (median diagnostic age = 4) was later than with greater than or equal to 5 Mongolian spots (median diagnostic age = 3) in MPS group (z=-2.728, P = 0.006). Comparing MPS groups (median maximum length = 7.0cm) and control groups (median maximum length = 3.0cm), the two groups were statistically different (z=-7.801, P < 0.001). In MPS group, Mongolian spots were mainly distributed in the buttocks (81.93%) and back (68.07%), followed by the lower limbs (27.71%), abdomen (22.29%), and upper limbs (19.88%), with fewer distribution in areas such as the head, face, neck, and chest. Among the MPS patients born with Mongolian spots, there were 19.28% of patients had the disappearance of Mongolian spots by the time of investigation.
Conclusions
This study demonstrated Mongolian spots were a common feature in patients with MPS, especially in type 2, 1, and 6. Extensive Mongolian spots might be an indicator for early screening of MPS.
Incremental Health Care Expenditures Associated with Hypertension in South Korea
Authors: Kim Tae Hyun , Hong Minji , Kim Bomgyeol , Chang Hyuk-Jae 
Published: September 2023

Abstract
Hypertension is a significant risk factor for cardiovascular disease and the number of deaths due to hypertension increases annually. The increasing healthcare costs of hypertension are a major societal and personal issue. By estimating the medical expenses incurred by patients with hypertension, this study aimed to provide information on the additional costs of hypertension and emphasize the importance of blood pressure management. Health Panel data from 2014 to 2018 were used to calculate incremental out-of-pocket healthcare costs associated with hypertension. First, we compared the mean annual differences in medical expenditure of people with and without hypertension each year. Second, we analyzed five-year panel data from 2014 to 2018 using random Generalized Least Squares. In a cross-sectional mean difference analysis, we found that as of 2018, individuals with hypertension spent an average of 537,735 won more per year on healthcare than those without hypertension. In a five-year panel data analysis, hypertension was associated with an average of 295,803 won in medical expenses per year for the same sex, age, and income groups. Hypertension incurs incremental costs in treating the condition and its complications. This study aimed to provide information on out-of-pocket healthcare costs associated with hypertension. We highlight the importance of ongoing disease management by discussing the financial burden of chronic diseases on individuals. Managing blood pressure at a young age can reduce healthcare costs throughout an individual’s lifetime.
Memory consolidation drives the enhancement of remote cocaine memory via prefrontal circuit
Authors: Lu Lin , Liu Xiaoxing , Lu Tangsheng , Chen Xuan , Huang Shihao , Zheng Wei , Zhang Wen , Meng Shi-Qiu , Yan Wei , Shi Le , Bao Yanping , Xue Yan-Xue , Shi Jie , Yuan Kai , Han Ying 
Published: September 2023

Abstract
Remote memory usually decreases over time, whereas remote drug-cue associated memory exhibits enhancement, increasing the risk of relapse during abstinence. Memory system consolidation is a prerequisite for remote memory formation, but neurobiological underpinnings of the role of consolidation in the enhancement of remote drug memory are unclear. Here, we found that remote cocaine-cue associated memory was enhanced in rats that underwent self-administration training, together with a progressive increase in the response of prelimbic cortex (PrL) CaMKⅡ neurons to cues. System consolidation was required for the enhancement of remote cocaine memory through PrL CaMKⅡ neurons during the early period post-training. Furthermore, dendritic spine maturation in the PrL relied on the basolateral amygdala (BLA) input during the early period of consolidation, contributing to remote memory enhancement. These findings indicate that memory consolidation drives the enhancement of remote cocaine memory through a time-dependently increase in activity and maturation of PrL CaMKⅡ neurons receiving a sustained BLA input.