bluuebunny/crossref_metadata_2025 huggingface dataset:
Improving Wear Resistance and Corrosive Resistance of Cemented Carbide for Mud Pulser Rotor by Deep Cryogenic Treatment
Authors: Zhang Weiguo , Wu Xiaowei , Tian Jun , Huang Xi , Yu Wentao , Zhu Wenchao , He Jingwen
Published: March 2024

Cemented carbide used in the rotor of a mud pulser is subjected to the scouring action of solid particles and corrosive mud media for a long time, which causes abrasive wear and electrochemical corrosion. To improve the wear and corrosive resistance of cemented carbide, samples with different cobalt content (WC-5Co, WC-8Co, and WC-10Co) receive deep cryogenic treatment (DCT) at −196 °C for 2.5 h. An optical metalloscope (OM) and X-ray diffractometer (XRD) are used to observe the phase changes of cemented carbides, and the XRD is also used to observe the change in residual stress on the cemented carbide’s surface. A scanning electron microscope (SEM) is used to characterize the wear and electrochemical corrosion surface microstructure of cemented carbides (untreated and DCT). The results show that the DCT promotes the precipitation of the η phase, and the diffraction peak of ε-Co tends to intensify. Compared with the untreated, the wear rates of WC-5Co, WC-8Co, and WC-10Co can be reduced by 14.71%, 37.25%, and 41.01% by DCT, respectively. The wear form of the cemented carbides is mainly the extrusion deformation of Co and WC shedding. The precipitation of the η phase and the increase in WC residual compressive stress by DCT are the main reasons for the improvement of wear resistance. The electrochemical corrosion characteristic is the dissolution of the Co phase. DCT causes the corrosion potential of cemented carbide to shift forward and the corrosion current density to decrease. The enhancement of the corrosion resistance of cemented carbide caused by DCT is due to the Co phase transition, η phase precipitation, and the increase in the compressive stress of cemented carbide.
Influences of Composite Electrodeposition Parameters on the Properties of Ni-Doped Co-Mn Composite Spinel Coatings
Authors: Tong Wei , Wang Weiqiang , Leng Xiayu , Song Jianli
Published: March 2024

To enhance the comprehensive performance of solid oxide fuel cells (SOFCs) ferritic stainless steel (FSS) interconnectors, a novel approach involving composite electrodeposition and thermal conversion is proposed to prepare Ni-doped Co-Mn composite spinel protective coatings on FSS surfaces. The process involves the composite electrodeposition of a Ni-doped Co-Mn precursor coating, followed by thermal conversion to obtain the Co-Mn-Ni composite spinel coating. Crofer 22H was used as the substrate and orthogonal experiments were designed to investigate the influences of deposition solution pH, stirring rate, cathode current density, and the element content of Mn and Ni on the surface morphology and properties of the composite coatings, respectively. The characterization of the prepared coatings was conducted through macroscopic and microscopic morphology observations of the component surface, energy dispersive spectroscopy (EDS) analysis, and area specific resistance (ASR) testing, etc. Finally, the optimized composite electrodeposition parameters and the Mn-Ni content ratio in the solution were obtained. Experimental results indicated that the composite spinel coating prepared with the optimized process parameters exhibited excellent adhesion to the substrate, and the diffusion and migration of Cr element has been effectively inhibited. Compared with the substrate, the ASR of the coated components has also been decreased simultaneously, which provided an effective method for the surface modification of SOFC FSS interconnectors.
Do Not Freak Me Out! The Impact of Lip Movement and Appearance on Knowledge Gain and Confidence
Authors: Abdulrahman Amal , Hopman Katherine , Richards Deborah
Published: March 2024

Virtual agents (VAs) have been used effectively for psychoeducation. However, getting the VA’s design right is critical to ensure the user experience does not become a barrier to receiving and responding to the intended message. The study reported in this paper seeks to help first-year psychology students to develop knowledge and confidence to recommend emotion regulation strategies. In previous work, we received negative feedback concerning the VA’s lip-syncing, including creepiness and visual overload, in the case of stroke patients. We seek to test the impact of the removal of lip-syncing on the perception of the VA and its ability to achieve its intended outcomes, also considering the influence of the visual features of the avatar. We conducted a 2 (lip-sync/no lip-sync) × 2 (human-like/cartoon-like) experimental design and measured participants’ perception of the VA in terms of eeriness, user experience, knowledge gain and participants’ confidence to practice their knowledge. While participants showed a tendency to prefer the cartoon look over the human look and the absence of lip-syncing over its presence, all groups reported no significant increase in knowledge but significant increases in confidence in their knowledge and ability to recommend the learnt strategies to others, concluding that realism and lip-syncing did not influence the intended outcomes. Thus, in future designs, we will allow the user to switch off the lip-sync function if they prefer. Further, our findings suggest that lip-syncing should not be a standard animation included with VAs, as is currently the case.
Zingiber Officinale Roscoe: The Antiarthritic Potential of a Popular Spice—Preclinical and Clinical Evidence
Authors: Szymczak Joanna , Grygiel-Górniak Bogna , Cielecka-Piontek Judyta
Published: March 2024

The health benefits of ginger rhizomes (Zingiber officinale Roscoe) have been known for centuries. Recently, ginger root has gained more attention due to its anti-inflammatory and analgesic activities. Many of the bioactive components of ginger may have therapeutic benefits in treating inflammatory arthritis. Their properties seem especially helpful in treating diseases linked to persistent inflammation and pain, symptoms present in the course of the most prevalent rheumatic diseases, such as osteoarthritis (OA) and rheumatoid arthritis (RA). This review analyzes the current knowledge regarding ginger’s beneficial anti-inflammatory effect in both in vitro and in vivo studies as well as clinical trials. The drug delivery systems to improve ginger’s bioavailability and medicinal properties are discussed. Understanding ginger’s beneficial aspects may initiate further studies on improving its bioavailability and therapeutic efficacy and achieving more a comprehensive application in medicine.
Differentiation of Pluripotent Stem Cells for Disease Modeling: Learning from Heart Development
Authors: Chi Congwu , Roland Truman J. , Song Kunhua
Published: March 2024

Heart disease is a pressing public health problem and the leading cause of death worldwide. The heart is the first organ to gain function during embryogenesis in mammals. Heart development involves cell determination, expansion, migration, and crosstalk, which are orchestrated by numerous signaling pathways, such as the Wnt, TGF-β, IGF, and Retinoic acid signaling pathways. Human-induced pluripotent stem cell-based platforms are emerging as promising approaches for modeling heart disease in vitro. Understanding the signaling pathways that are essential for cardiac development has shed light on the molecular mechanisms of congenital heart defects and postnatal heart diseases, significantly advancing stem cell-based platforms to model heart diseases. This review summarizes signaling pathways that are crucial for heart development and discusses how these findings improve the strategies for modeling human heart disease in vitro.
Anti-Inflammatory Effects of Chamaecyparis obtusa (Siebold & Zucc.) Endl. Leaf Extract Fermented by Ganoderma applanatum Mycelia
Authors: Kim Chae-Hyun , Kwon Yong-Jin , Jang Young-Ah
Published: March 2024

Corticosteroids are commonly used anti-inflammatory agents. However, their prolonged use can lead to side effects. Therefore, the development of natural compounds with minimal side effects is necessary. This study was performed to investigate the anti-inflammatory effects and mechanisms of action of Chamaecyparis obtusa (Siebold & Zucc.) Endl. leaf (COL), bioconverted using Ganoderma applanatum (G. applanatum) in lipopolysaccharide (LPS)-induced RAW264.7 cells. The COL 70% EtOH extract fermented by G. applanatum (70COLGA) improved the high cytotoxicity of 70% EtOH extracts (70COL). When RAW264.7 cells were pre-treated with 100 and 200 μg/mL of 70COLGA for 2 h and then treated with LPS for 16 h, LPS induced the production of nitric oxide (NO), and the expressions of inducible nitric oxide synthase (iNOS) and cyclooxygenase 2 (COX-2) were significantly inhibited. When RAW264.7 cells were pre-treated with 100 and 200 μg/mL of 70COLGA for 2 h and then treated with LPS for 4 h, the phosphorylation of signal transducers and activators of transcription (STAT) was markedly decreased. In addition, 70COLGA markedly suppressed the production of the inflammatory cytokines interleukin (IL)-1β and IL-6 in LPS-induced RAW264.7 cells. Analysis of pro-inflammatory molecules using cytokine arrays showed that macrophage inflammatory protein (MIP)-2, granulocyte–macrophage colony-stimulating factor (GM-CSF), granulocyte colony-stimulating factor (G-CSF) and IL-27 expressions were also suppressed by 200 μg/mL of 70COLGA in LPS-induced RAW264.7 cells. These results demonstrate that 70COLGA significantly prevented inflammatory responses by inhibiting the secretion of pro-inflammatory molecules in LPS-induced RAW264.7 cells. When RAW264.7 cells were pre-treated with 100 and 200 μg/mL of 70COLGA for 2 h and then treated with LPS-conditioned medium (LPS-CM) for 30 min, 70COLGA directly inhibited STAT activation. In summary, our findings suggest that 70COLGA has therapeutic potential for the treatment of inflammatory diseases.
Animal Pneuma: Reflections on Environmental Respiratory Phenomenology
Authors: Škof Lenart
Published: March 2024

This essay is an attempt to propose an outline of a new respiratory animal philosophy. Based on an analysis of the forgetting of breath in Western philosophy, it aims to gesture towards a future, breathful and compassionate world of co-sharing and co-breathing. In the first part, the basic features of forgetting of breath are explained based on David Abram’s work in respiratory ecophilosophy. This part also introduces an important contribution to modern philosophy by Ludwig Klages. The second part is dedicated to reflections on what I understand as an unfortunate transition from soul and pneuma to spirit and Geist. Based on these analyses, I proceed towards an idiosyncratic thought on the nocturnal mystery of pneuma, with references to ancient Upanishadic and 20th-century phenomenological Levinasian thought. Based on these teachings, I argue that, at the bottom of her existence, the subject is a lung partaking in an immense external lung (Merleau-Ponty). In the fourth part of the essay, I extend my reflections toward comparative animal respiratory phenomenology and argue for the immense compassion for all our fellow breathing beings. Finally, in the concluding, fifth part of this essay, I am arguing for a future biocentric and breathful environment, signifying and bringing a new compassionate-respiratory alliance into the world.
High-Throughput Additive Manufacturing of Continuous Carbon Fiber-Reinforced Plastic by Multifilament
Authors: Tu Yiwen , Tan Yuegang , Zhang Fan , Zou Shulin , Zhang Jun
Published: March 2024

Additive manufacturing (or 3D printing) of continuous carbon fiber-reinforced plastics with fused deposition modeling is a burgeoning manufacturing method because of its potential as a powerful approach to produce lightweight, high strength and complex parts without the need for a mold. Nevertheless, it cannot manufacture parts rapidly due to low throughput. This paper proposes a high-throughput additive manufacturing of continuous carbon fiber-reinforced plastics by multifilament with reference to fiber tape placement. Three filaments were fed and compaction printed simultaneously by a robotic manufacturing system. The coupled thermal-mechanical model of the filament deformation during printing was developed to eliminate the initial interval between the filaments and improved mechanical properties. Furthermore, the mathematical relationship between filament deformation and printing parameters consisting of printing temperature, printing speed and roller pressure was proposed using response surface methodology with the line width as the response. The tensile tests demonstrate that the tensile properties of printed parts are positively correlated with the line width, but not infinitely improved. The maximum tensile strength and tensile modulus are 503.4 MPa and 83.11 Gpa, respectively, which are better than those obtained by traditional methods. Void fraction and scanning electron microscope images also reveal that the appropriate line width achieved by the reasonable printing parameters contributes to the high-throughput multifilament additive manufacturing of continuous carbon fiber-reinforced plastics. The comparison results indicate that the high-throughput multifilament additive manufacturing proposed in this paper can effectively improve the speed of continuous carbon fiber-reinforced plastics additive manufacturing without degrading the mechanical performance.
Global Sensitivity Analysis of Factors Influencing the Surface Temperature of Mold during Autoclave Processing
Authors: He Jiayang , Zhan Lihua , Yang Youliang , Xu Yongqian
Published: March 2024

During the process of forming carbon fiber reinforced plastics (CFRP) in an autoclave, deeply understanding the global sensitivity of factors influencing mold surface temperature is of paramount importance for optimizing large frame-type mold thermally and enhancing curing quality. In this study, the convective heat transfer coefficient (CHTC), the thickness of composite laminates (TCL), the thickness of mold facesheet (TMF), the mold material type (MMT), and the thickness of the auxiliary materials layer (TAL) have been quantitatively assessed for the effects on the mold surface temperature. This assessment was conducted by building the thermal–chemical curing model of composite laminates and utilizing the Sobol global sensitivity analysis (GSA) method. Additionally, the interactions among these factors were investigated to gain a comprehensive understanding of their combined effects. The results show that the sensitivity order of these factors is as follows: CHTC > MMT > TMF > TCL > TAL. Moreover, CHTC, MMT, and TMF are the main factors influencing mold surface temperature, as the sum of their first-order sensitivity indices accounts for over 97.3%. The influence of a single factor is more significant than that of the interaction between factors since the sum of the first-order sensitivity indices of the factors is more than 78.1%. This study will support the development of science-based guidelines for the thermal design of molds and associated heating equipment design.
Experimental and Numerical Investigation of Polymer-Based 3D-Printed Lattice Structures with Largely Tunable Mechanical Properties Based on Triply Periodic Minimal Surface
Authors: Wang Zhenjie , Xu Menghui , Du Jianke , Jin Yuan
Published: March 2024

Triply periodic minimal surfaces (TPMSs) have demonstrated significant potential in lattice structure design and have been successfully applied across multiple industrial fields. In this work, a novel lattice structure with tunable anisotropic properties is proposed based on two typical TPMS types, and their mechanical performances are studied both experimentally and numerically after being fabricated using a polymer 3D printing process. Initially, adjustments are made to the original TPMS lattice structures to obtain honeycomb lattice structures, which are found to possess significant anisotropy, by utilizing numerical homogenization methods. Based on this, a continuous self-twisting deformation is proposed to change the topology of the honeycomb lattice structures to largely tune the mechanical properties. Quasi-static compression experiments are conducted with different twisting angles, and the results indicate that self-twisting can affect the mechanical properties in specific directions of the structure, and also enhance the energy absorption capacity. Additionally, it mitigates the risk of structural collapse and failure during compression while diminishing structural anisotropy. The proposed self-twisting strategy, based on honeycomb lattice structures, has been proven valuable in advancing the investigation of lattice structures with largely tunable mechanical properties.
Tailoring Pectin-PLA Bilayer Film for Optimal Properties as a Food Pouch Material
Authors: Said Nurul Saadah , Olawuyi Ibukunoluwa Fola , Lee Won Young
Published: March 2024

This study focuses on developing a biodegradable film using a novel hybrid citrus peel pectin. A bilayer approach with PLA was proposed and optimized using Response Surface Methodology (RSM) to complement pectin films’ mechanical and barrier property limitations. The optimized film composition (2.90 g PLA and 1.96 g pectin) showed enhanced mechanical strength with a tensile strength (TS) of 7.04 MPa and an elongation at break (EAB) of 462.63%. In addition, it demonstrated lower water vapor (1.45 × 10−10 g/msPa), oxygen (2.79 × 10−7 g/ms) permeability, and solubility (23.53%). Compared to single-layer pectin films, the optimized bilayer film had a 25% increased thickness, significantly improved water barrier (3806 times lower) and oxygen barrier (3.68 times lower) properties, and 22.38 times higher stretchability, attributed to hydrogen bond formation, as confirmed by FTIR analysis. The bilayer film, effectively protected against UV and visible light, could be a barrier against light-induced lipid oxidation. Moreover, it demonstrated superior seal efficiency, ensuring secure sealing in practical applications. The bilayer pouch containing mustard dressing exhibited stable sealing with no leakage after immersion in hot water and ethanol, making it suitable for secure food pouch packaging.
Identity Status as a Moderator of the Relationship between Belonging to Religious Communities and Religious Coping in a Group of Young Polish Catholic Girls and Boys
Authors: Pilarska Natalia , Liberska Hanna
Published: March 2024

The present study aims to test the importance of belonging to religious communities to the frequency of using religious strategies for coping with stress, taking into account the moderating role of identity status and gender. This study used Polish adaptations of two questionnaires: The Religious Coping Questionnaire and the Dimensions of Identity Development Scale. Participants in this study were adolescent and young adult Polish Catholic girls and boys, belonging and not belonging to religious communities. The survey was carried out using the pencil–paper method on a sample of 407 young people with varying degrees of involvement in religious practice. A multivariate analysis of variance showed that the frequency of using positive religious coping strategies differs significantly between groups of people belonging to and not belonging to a religious community. As a result of the study, the interaction of the variable belonging to a religious community and the variable identity status in deciding on the frequency of using positive religious strategies for coping with stress was recognized (F = 2.448; p = 0.033). However, the interaction of these variables with gender did not reach the level of statistical significance (F = 0.655; p = 0.658). Multiple regression analysis indicates that the identity dimension Identification with Commitment explains 14.7% of the frequency of using the Cooperation with God strategy. Belonging to religious communities is significant for the frequency of use of selected religious coping strategies and the intensity of all dimensions of identity development. The results of the statistical analysis showed that identity status is a moderator of the relationship between belonging to religious communities and the intensity of positive religious coping strategies. It was found that the frequency of use of religious coping strategies and the intensity of identity dimensions differed between Polish Catholic girls and boys.
Indication Variability of the Particulate Matter Sensors Dependent on Their Location
Authors: Wiora Alicja , Wiora Józef , Kasprzyk Jerzy
Published: March 2024

Particulate matter (PM) suspended in the air significantly impacts human health. Those of anthropogenic origin are particularly hazardous. Poland is one of the countries where the air quality during the heating season is the worst in Europe. Air quality in small towns and villages far from state monitoring stations is often much worse than in larger cities where they are located. Their residents inhale the air containing smoke produced mainly by coal-fired stoves. In the frame of this project, an air quality monitoring network was built. It comprises low-cost PMS7003 PM sensors and ESP8266 microcontrollers with integrated Wi-Fi communication modules. This article presents research results on the influence of the PM sensor location on their indications. It has been shown that the indications from sensors several dozen meters away from each other can differ by up to tenfold, depending on weather conditions and the source of smoke. Therefore, measurements performed by a network of sensors, even of worse quality, are much more representative than those conducted in one spot. The results also indicated the method of detecting a sudden increase in air pollutants. In the case of smokiness, the difference between the mean and median indications of the PM sensor increases even up to 400 µg/m3 over a 5 min time window. Information from this comparison suggests a sudden deterioration in air quality and can allow for quick intervention to protect people’s health. This method can be used in protection systems where fast detection of anomalies is necessary.
Challenges and Opportunities for the Development of Inland Waterway Transport in Brazil
Authors: Vilarinho Ademar , Liboni Lara Bartocci , Cezarino Luciana Oranges , Micco Javier Durán , Mommens Koen , Macharis Cathy
Published: March 2024

Despite the presence of numerous navigable rivers in Brazil, they remain underutilized for Inland Waterway Transport (IWT). Given the recent changes in transport systems which aim to reduce reliance on highways due to their high cost and lack of sustainability, it becomes crucial to explore new transport models in Brazil, shifting part of the transport from roads to railways and mainly to waterways. To fill this gap in Brazil’s transport system, it was decided to check why waterways are little used and what challenges cause them to be underutilized and, additionally, what opportunities could leverage their use in the country. In this sense, in this study, we identify the biggest challenges and opportunities faced by IWT in Brazil. To achieve this objective, interviews were conducted using content analysis with managers who work in public and private IWT organizations active in Brazil. Results show that IWT has seen a recovery in interest in recent years due to the need for cheaper and greener logistics. It was also found that the main challenges that IWT faces are a lack of public policies followed by precarious infrastructure of waterways, ports and locks, as well as modest integration with other transport modes. Conversely, the most significant opportunity lies in the potential reduction in transport costs, coupled with the enhanced sustainability of transport activities via the utilization of IWT, thereby fostering greener transport practices. These results can contribute to a better understanding of practical and theoretical approaches related to IWT in Brazil, and they can serve as a reflection for new research focusing on the development of IWT especially in other emerging countries facing similar issues.
Navigating the Path of Least Resistance to Sustainable, Widespread Adoption of Nuclear Power
Authors: Holdsworth Alistair F. , Ireland Edmund
Published: March 2024

With climate change rapidly accelerating, we must seriously reconsider our inconsistent and, at times, disjointed approach to energy grid decarbonisation by applying extant low-carbon technologies rapidly and at scale rather than continuing to rely on fossil fuel generation. In contrast to more transient renewables such as wind and solar energy, nuclear power is capable of reliably generating large quantities of baseload low-carbon energy. Despite this advantage, however, deployment has stagnated due to a combination of high costs, safety concerns, and an unwillingness of political authorities to commit to a large-scale, publicly funded program. The focus on private sector leadership in R&D has resulted in a smorgasbord of under-developed and conceptual reactor and fuel cycle technologies, many of which are a decade or more from commercial viability. Meanwhile, the aforementioned political issues have prevented the necessary long-term funding, incentivisation, or provision of the necessary market structures for the significant construction of actual generating plants. With this in mind, we present a potential path to a long-term sustainable approach to the nuclear fuel cycle, highlighting key reactor and fuel cycle technologies and providing an overview of how these should be implemented. Additionally, we discuss the industrial, political, and societal changes needed to achieve this through the comprehensive management of both waste and resources.
Residential Prosumer Energy Management System with Renewable Integration Considering Multi-Energy Storage and Demand Response
Authors: Ali Asjad , Aftab Abdullah , Akram Muhammad Nadeem , Awan Shoaib , Muqeet Hafiz Abdul , Arfeen Zeeshan Ahmad
Published: March 2024

Rising energy demands, economic challenges, and the urgent need to address climate change have led to the emergence of a market wherein consumers can both purchase and sell electricity to the grid. This market leverages diverse energy sources and energy storage systems to achieve significant cost savings for consumers while providing critical grid support for utilities. In this study, an energy management system has been employed to tackle the optimization problem associated with various energy sources. This approach relies on mixed-integer linear programming (MILP) to optimize energy utilization while adhering to diverse constraints, yielding a feasible energy solution. This model is applied to real-world energy system consumption data and forecasts the most cost-effective day-ahead energy plans for different types of loads engaged in demand response. Furthermore, time-based charging and discharging strategies for electric vehicles and energy storage systems are considered, conducting a comprehensive analysis of energy costs across various storage devices. Our findings demonstrate that implementing this model can lead to an 18.26% reduction in operational costs when using lithium batteries and a remarkable 14.88% reduction with lead–acid batteries, particularly when integrating solar power and an EV into the system, while GHG is reduced by 36,018 grams/day for a load of 25 kW in one particular scenario. However, the analysis reveals that integrating wind power is not economically viable due to its comparatively higher operational costs.
Exploring Business Environment Policy Changes in China Using Quantitative Text Analysis
Authors: Hu Shuigen , Wu Xiaochi , Cang Yilin
Published: March 2024

A conducive business environment is crucial for establishing a sustainable market economy. This paper aims to quantitatively analyze the evolution of China’s business environment policy, offering valuable insights for future optimization. Focusing on 1335 national-level business environment policies from 2006 to 2023, this study employed a social network analysis (SNA) and the latent Dirichlet allocation (LDA) model to investigate policy changes in terms of the issuing rhythm, collaborating departments, and policy attention. The findings reveal: (1) China has established a mature policy system for its business environment, with both an increasing number and improving impact of related policies. (2) A governance network of the business environment has gradually formed, with the participation of differentiated departments and the domination of one central unit, ensuring efficient collaboration and clear instruction. (3) The attention of the business environment policy has shifted from attracting foreign investment and developing the industrial chain to simplifying bureaucratic approval procedures, smoothing trade circulation, and ensuring legal reliability. This paper’s results serve as an empirical contribution to the field of business environment policy research.
A Comprehensive Analysis of China’s Water Resources Tax Reform
Authors: Luo Taolu , Tian Guiliang , Li Jiawen , Han Xiaosheng
Published: March 2024

In response to the growing disparity between the supply and demand of water resources, the Chinese government has piloted a more binding and reformed water resources tax to realize the sustainable utilization of water resources. However, reasonable tax standards and their water-saving effects and economic benefits are important and worthy of attention. Therefore, in this study, we combine the virtual water theory with the price input–output model to discuss the impact of water resources taxation on the economy and its water-saving effects. The results show the following: (1) A water resources tax has a significant water-saving effect, and is predicted to save 33.12 billion cubic meters of virtual water. (2) Consumers’ expected reductions in spending on food and tobacco manufacturing and agriculture are predicted to save more virtual water at a lower economic cost. (3) The collection of water resources taxes can actively and simultaneously guide water savings in terms of consumption and production. The water consumption of the construction industry is worthy of attention. The expected output value reduction accounts for 67.2% of the total output value reduction, and its water savings account for 96% of the total water savings. Other service sectors also have ample room to optimize the utilization of their water resources.
Terrestrial and Aquatic Plastisphere: Formation, Characteristics, and Influencing Factors
Authors: Tang Kuok Ho Daniel
Published: March 2024

The increasing number of plastic particles in the environment gives rise to a unique ecological niche called the plastisphere, which is characterized by a dynamic assemblage of microorganisms comprising autotrophs, heterotrophs, predators, and pathogens. This paper reviews the formation, characteristics, and factors influencing the terrestrial and aquatic plastisphere. The terrestrial and aquatic plastisphere forms when hitchhiking microorganisms, often bacteria, in the environment adhere to the surfaces of plastic particles and alter the surface properties of the particles for subsequent colonization of increasingly tightly clinging microorganisms. The terrestrial plastisphere is not as mobile as the aquatic plastisphere and is defined by the characteristics of the soil anchoring it. The microorganisms on the plastisphere are often defined by the dominant microorganisms in the surroundings, particularly those of the phyla Proteobacteria, Actinobacteria, Bacteroidota, Firmicutes, Chloroflexi, Acidobacteria, Cyanobacteria, Ascomycota, Basidiomycota, Chytridiomycota, Ciliophora, Ochrophyta, and Chlorophyta. However, the compositions and dominant microbial species on different plastic surfaces vary widely as they change with time, plastic properties, and biotic and abiotic environmental factors. Temporal changes in the plastisphere are due to succession. Plastic properties, particularly the type, surface properties, size, color, degree of aging, and chemical leaching, also affect the composition of the plastisphere. Biotic environmental factors comprising the dominant ambient microorganisms and interspecies interactions, together with the abiotic ones, including pH, temperature, nutrient availability, soil properties, salinity, and light, significantly shape the plastisphere. This review provides insight into the biodiversity of the plastisphere, and its roles in spreading pathogens and degrading plastics.
Pinturas parietais, narrativa e imaginação
Authors: Antunes Viviani Ana Elisa , Baitello Junior Norval
Published: March 2024

Neste trabalho investigamos a natureza da imagem tendo como objeto empírico os registros rupestres de tempos pré-coloniais localizados na região da Serra do Cipó, Estado de Minas Gerais, Brasil. Tradicionalmente estudadas pela ciencia arqueológica que interpreta tais imagens com o rigor metodológico e as teorías que lhe embasam, neste trabalho propomos analisá-las como resultante de uma triangulação entre corpo, meio e ambiente, tendo como horizonte teórico a Antropología da Imagem, de Hans Belting, e a Teoria da Cultura, de Ivan Bystrina. Essa triangulação revelou que tais imagens, em sua relação de proximidade e distancia com o observador, possuem um valor de culto. Ou seja, mais que representações, essas pinturas articulavam sonhos e imaginações plasmadas na parede da rocha sob a forma de narrativas.
Teaching students in high school using multimedia technologies
Authors: Mamchych Olena , Rusyn Halyna , Bosa Vita , Nikitina Oksana , Moiseienko Natalia
Published: March 2024

The peculiarities of the training of specialists in higher education using multimedia technologies are clarified and their importance and necessity for modern education are shown. Based on the recorded didactic and technical pedagogical capabilities of multimedia, we will identify potential functions that can be differentially implemented in the educational space. Manipulation, deformation, contamination, toning of images, discrete presentation of audiovisual information is considered; fixation of a selected part of visual information for movement, its further examination "under a magnifying glass", demonstration of processes and events in the real-time, multi-window presentation of audiovisual information, which intensify the educational process and strengthen the motivational effect in the educational field. Research and experimental work were carried out, which made it possible to find out the peculiarities of the training of specialists in higher education using multimedia technologies and to prove their importance and necessity for modern education. We have reasonably identified the stages that are important for the educational space for the qualitative application of knowledge and skills in the training of specialists; advantages of the introduction of multimedia technologies; various aspects of the use of computer software multimedia tools in the process of professional training of a specialist are named.
Historical evolution of civil service in Ukraine
Authors: Morozov Oleh , Аnanin Oleh , Vasylenko Vitalii , Golubchyk Ganna
Published: March 2024

The article investigated the processes of establishment, continuous development, and transformation of the civil service in Ukraine from the period of the establishment of Kyivan Rus to the present-day Ukrainian state. The historiographical components of the formation and institution of the civil service were identified, and the objective principles and significant differences in its developmental periodization were characterized. The methodological framework of this research was based on the institutional and structural methods, normative-legal description of events, the method of communicative support of historical consequences and facts, the functional and structural methods, and the professional and cultural substantiation of historical and state-building results. It was demonstrated that the progressive and complex development of the civil service system accompanied the physical development of the state. The research confirmed that the civil service and governance system received a significant impetus during the period of convergence and subsequent integration with the Russian Empire. The article proves that significant changes in the civil service system were introduced by the Austro-Hungarian Empire. It is determined that the institutional framework of the civil service appeared in Ukraine between 1917 and 1921 due to the activities of Hetman Petro Skoropadskyi. The authors substantiated the pathways and prospective consequences of modernizing and developing the civil service of independent Ukraine.
The Effect of Corporate Governance on Firm Value Mediated by Earnings Quality
Authors: Lukman Lukman , Sambur Sindi Claudia , Mardiana Ana
Published: March 2024

This research aims to analyze the effect of corporate governance on corporate value with earnings quality as mediating variable. The population used in this study is manufacturing companies listed on the Indonesia Stock Exchange within 2019 to 2021. The theories used are agency theory and stakeholder theory. Total population in this study is 157 companies. The sample selected with purposive sampling technique, that 56 sample companies was obtained. The analysis used in this study is path analysis with Sobel testing. Results of this study show that first hypothesis is rejected because the audit committee has a negative and significant effect on earnings quality, the second hypothesis is accepted because the Board of Directors has a positive and significant effect on earnings quality, the third hypothesis is rejected because earnings quality has a negative effect and significant to firm value, the fourth hypothesis is accepted because earnings quality able to mediate the influence of the audit committee on firm value and the fifth hypothesis is accepted because earnings quality is able to mediate the influence of the board of directors on firm value.
OKUL ÖNCESİ ÖĞRETMENLERİNİN DEPREM KAYGISI VE EĞİTİM ÖĞRETİM SÜRECİNE YANSIMALARI
Authors: Özoruç Nuhpelda , Dikici Sığırtmaç Ayperi
Published: March 2024

Ülkemizde 6 Şubat 2023 tarihinde yaşanan Pazarcık merkezli deprem 11 ili etkilemiş olup asrın felaketi olarak adlandırılmıştır. Deprem can kayıpların, maddi ve manevi kayıplara neden olmuştur. Artçı depremlerin devam etmesiyle birlikte başta çocuklar olmak üzere yetişkinlerin psikolojilerini etkilemiş olup kaygı ve stres durumları yaşamalarına sebep olmuştur. Bu çalışma, 6 Şubat 2023 Kahramanmaraş depremlerinin okul öncesi öğretmenleri ve çocukları nasıl etkilediğini belirlemeyi amaçlamaktadır. Karma desen ile yürütülen bu çalışmanın katılımcılarını depremi yaşayan 174 okul öncesi öğretmeni oluşturmaktadır. Çalışmanın ilk aşamasında Bal ve Akgül (2023) tarafından geliştirilen Deprem Kaygı Ölçeği uygulanmıştır. İkinci aşamada kaygı düzeyleri yüksek olan 10 okul öncesi öğretmeniyle görüşme yapılmıştır. Çalışmanın sonucunda okul öncesi öğretmenlerinin depremin etkisiyle kaygı ve stres bozuklukları yaşadığı, okulların açılmasıyla birlikte stres durumlarının azaldığı ve günlük yaşantılarına dönmelerinin hızlandığı belirlenmiştir. Depremin etkilerinin okul öncesi dönemdeki çocukların yaşantılarına, eğitim sürecine ve oyunlarına yansıdığı görülmüştür. Bu süreci öncelikle öğretmenler ve öğretmenler aracılığıyla çocukların sağlıklı bir şekilde atlatabilmesi için öğretmenlere destek hizmetlerin verilmesi önerilebilir.
Evaluating the Effectiveness of the Experimental Use of the Collagen Conduit Filled With Dermal hydrogel to Repair a Peripheral Nerve Defect
Authors: Melkonian K. I. , Rusinova T. V. , Asyakina A. S. , Fomenco A. A. , Solop E. A. , Chuprynin G. P. , Vinogradov R. A. , Antonova O. Y.
Published: March 2024

Background: Current studies show that hollow conduits in combination with various synthetic and biological fillers significantly accelerate functional recovery of peripheral nerves. One of such fillers can be a hydrogel based on the extracellular matrix of the dermis, which contains surface ligands capable of providing topographic and biological signals for nerve regeneration.

Objective: To evaluate the effectiveness of rat sciatic nerve regeneration using a collagen conduit filled with dermal hydrogel in an in vivo experiment.

Materials and methods: We evaluated the effectiveness of the NeuraGen® collagen conduit filled with dermal hydrogel and compared it with that of an autograft and the NeuraGen® hollow collagen conduit in experimental treatment of rat sciatic nerve defects larger than 1 cm. Male Wistar rats underwent sciatic nerve resection. We calculated the Sciatic Functional Index (SFI) and ratio of the calf circumference in an operated limb to that in an intact limb on days 30, 60, and 90 after implantation. We performed electrophysiological tests and explanted samples for hematoxylin-eosin staining on day 90 of the experiment.

Results: When assessing the SFI and electrophysiological parameters, the group of animals with autografts and the group with the NeuraGen® collagen conduits filled with dermal hydrogel demonstrated similar results. We observed muscle atrophy, low SFI scores, and low velocity and short duration of the action potential in the group with the hollow NeuraGen® collagen conduits. Histological analysis of explanted samples of the collagen conduits filled with dermal hydrogel demonstrated areas of glial proliferation and the absence of pronounced degeneration of nerve fibers throughout the implant compared with autografts, indicating functional regeneration of nerve fibers.

Conclusions: Evaluation of the effectiveness of rat sciatic nerve regeneration showed that the NeuraGen® collagen conduit filled with dermal hydrogel provides functional and morphological integration with the nerve compared with an autograft. Our findings can be used for further development and improvement of nerve conduits.
Long-Term Effects of Sacubitril/Valsartan After Chemotherapy for Breast Cancer in Patients With Chronic heart Failure
Authors: Kanorskiy S. G. , Pavlovets V. P.
Published: March 2024

Background: As the survival of patients with malignant neoplasms is improving, the urgent need for cardioprotective agents to counteract toxic effects of chemotherapy is growing.

Objective: To compare the cardioprotective efficacy of sacubitril/valsartan and candesartan in women with chronic heart failure and baseline reduced left ventricular ejection fraction (LVEF) during a 5-year prospective follow-up after chemotherapy for breast cancer.

Materials and methods: In this randomized study, 127 women with chronic heart failure and reduced LVEF after radical surgical treatment of breast cancer received potentially cardiotoxic adjuvant polychemotherapy (fluorouracil+ doxorubicin + cyclophosphamide). In addition, the patients received sacubitril/valsartan at a dose of up to 97/103 mg twice daily (n = 63) or candesartan at a dose of up to 32 mg once daily (n = 65), and this treatment was monitored for 5 years.

Results: The combination of sacubitril/valsartan was significantly superior to candesartan in improving left ventricular function and reducing the burden of ventricular arrhythmias and the risk of cardiovascular death (P = .039) at the long-term follow-up. Sacubitril/valsartan group and candesartan group did not differ in terms of mortality due to breast cancer progression or recurrence (P = .628).

Conclusions: Sacubitril/valsartan can be considered an effective and safe option for protecting the cardiovascular system during potentially cardiotoxic polychemotherapy for breast cancer in patients with chronic heart failure and baseline reduced LVEF.
“Forgotten” Encrusted Ureteral Stents, Combined Endourological Approach
Authors: Sergeev V. V. , Medvedev V. L. , Gabriel S. A. , Durleshter V. M. , Churbakov V. V. , Palaguta G. A. , Aboyan I. G. , Ismailov A. K.
Published: March 2024

Introduction: Ureteral stents have been widely used for drainage of the upper urinary tract during both emergency and elective surgical procedures since 1967. The main pathology in which these stents are used is urolithiasis.

Objective: To present our experience with the surgical treatment of patients with “forgotten” encrusted ureteral stents using a combined endourological approach.

Materials and methods: Patients with encrusted ureteral stents who underwent endourological procedures from 2016 to 2022 were prospectively evaluated. They were grouped based on the degree of stent encrustation according to the FECal classification. The duration of stent placement, number and types of surgical procedures, number of procedures before complete removal of the stent and concrements, surgery duration, hospital stay, complications, concrement analysis, and frequency of complete concrement removal per surgery were compared between the groups. The combined endourological procedure was performed with the patient placed in the Galdakao-modified supine Valdivia position. This position allows simultaneous antegrade and retrograde endourological access.

Results: The study included 46 patients grouped according to the FECal classification. In 38 patients, stents were successfully removed in a single procedure. The mean operative time, concrement-free status, and complication rate were 90.2 ± 19.8 minutes, 78.3%, and 32.6%, respectively. Total encrustation volume was higher for grades IV and V (5.6 ± 1.8 and 7.6 ± 2 cm3) compared with all the other grades. Percutaneous nephrolithotripsy and cystolithotripsy were the most common procedures in grades IV and V. Lithotripsy was commonly used for ureteral stent encrustation, especially in the groups with grades I and III. The operative time was longer in groups IV-V compared with groups I and II because percutaneous nephrolithotripsy was more frequent in these cases. Retrograde intrarenal surgery was performed in 88% of the cases with the combined approach to check whether concrements were present in the renal calyces and pelvis. In 5 cases, a flexible ureterorenoscope was advanced antegradely through a percutaneous access to disintegrate the encrustation of the proximal part of the stent’s ureteral section. Complications occurred in 32.6% of the patients. Most complications (26%) were minor: fever, pain, or gross hematuria. One case required segmental renal artery embolization for bleeding, and antibiotic therapy associated with an attack of pyelonephritis was adjusted in 2 cases.

Conclusions: The endoscopic combined approach in the Galdakao-modified supine Valdivia position is a safe and effective technique that allows removal of “forgotten” encrusted stents, in most cases, in a single procedure. The FECal classification seems to be useful for surgical planning and prognosis.