bluuebunny/crossref_metadata_2025 huggingface dataset:
Use of CBCT in Orthodontics: A Scoping Review
Authors: Polizzi Alessandro , Serra Sara , Leonardi Rosalia
Published: November 2024

Objectives: The present scoping review aims to provide a panoramic view of the current state of knowledge, highlighting the strengths, limitations, and future directions, on the use of CBCT in orthodontic practice. Methods: This study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) guidelines to identify eligible studies from the following databases: PubMed, Scopus, and Web of Science. The research question was formulated as follows: “What is the scientific evidence concerning the preferential use of 3D CBCT over 2D radiography in orthodontics”? Results: Through database searching, 521 records were identified, and ultimately, 37 studies that compared 3D CBCT with 2D conventional radiography were included. Of these, 16 articles regarded the use of CBCT for cephalometric analysis, 5 papers analyzed the evaluation of root resorption, 10 studies evaluated the diagnostic accuracy of root angulation and determining tooth position, and the remaining 6 articles were conducted for miscellaneous applications: determining the size of the nasopharyngeal airway (n = 2), miniscrew positioning (n = 1), estimating cervical vertebrae maturity (n = 1), and evaluating the correctness of the root location when placing digital indirect brackets (n = 1). Conclusions: The choice between 3D CBCT or CBCT-generated radiography and conventional 2D radiography in orthodontics involves careful consideration of the specific clinical context, the complexity of the case, and the balance between the diagnostic advantages and the associated limitations. Future Directions: Future studies with a prospective design and standardized imaging protocols are encouraged to facilitate the development of a consensus on the best practices.
Initial Real-World Experiences of Pulmonary Vein Isolation and Ablation of Non-Pulmonary Vein Sites Using a Novel Circular Array Pulsed Field Ablation Catheter
Authors: Yogarajah Joerg , Hutter Julie , Kahle Patrick , Beaujean Philipp , Tomic Marko , Hain Andreas , Sossalla Samuel , Kuniss Malte , Neumann Thomas
Published: November 2024

Background and Aims: Various pulsed field ablation (PFA) systems are currently being developed. Recently, a novel CE-approved circular array PFA catheter (PulseSelect™ PFA System, Medtronic, Minneapolis, MN, USA) was introduced. Data on this commercially available system are sparse. The aim was to elucidate real-world data assessing the feasibility, safety, and acute efficacy of pulmonary vein isolation (PVI) and ablation beyond PVI with this novel ablation system. Methods: Consecutive patients with paroxysmal and persistent atrial fibrillation (AF) undergoing first-time ablation with the circular PFA catheter were enrolled in this study. In patients with persistent AF and left atrial (LA) enlargement (LA area > 20 cm2), additional left atrial roof ablation (LARA) was performed. Those with concomitant typical atrial flutter received adjunctive cavo-tricuspid isthmus (CTI) ablation. Results: A total of 100 AF patients were included (29% female, 50% persistent AF). Of these, 33 patients (33%) underwent adjunctive LARA, 1 patient (1%) received posterior wall isolation, and 6 patients (6%) required additional CTI ablation. The skin-to-skin procedural time averaged 66.3 ± 13.8 min, while the fluoroscopy time and dose area product were 13.7 ± 4.7 min and 6.8 ± 4.9 Gycm2, respectively. Acute PVI was achieved in 100% of pulmonary veins. A bidirectional conduction block of the LARA and CTI lines was confirmed in all patients, and no major adverse events were reported. Conclusions: These real-world data demonstrate the feasibility, safety, and acute efficacy of PVI and ablation beyond PVI using a novel circular array PFA catheter in patients with atrial fibrillation and flutter. The system can easily be integrated with standard PVI workflows. Further and larger studies are warranted to assess the clinical long-term effectiveness and safety of this PFA system.
Risk Factors for Chronic Kidney Disease in Adult Patients with Congenital Heart Disease and Its Relationship with Cardiovascular Mortality
Authors: Martínez-Quintana Efrén , Rodríguez-González Fayna
Published: November 2024

Background: Patients with congenital heart disease (CHD) show risk factors for chronic kidney disease (CKD) and it is well known that CKD has a large negative impact on survival. Methods: Observational and prospective cohort study. Adult CHD patients and controls were matched for age and sex. Results: A total of 657 CHD adult patients (cases) and 1954 controls were studied. Median age in CHD patients was 30 (17–62) years and 373 (57%) were male. The prevalence of CKD (Glomerular filtration rate (GFR) < 60 mL/min/1.73 m2) was 0.2% and 4.5% in the control and CHD groups, respectively. Binary logistic regression analysis determined as risk factors for CKD in CHD patients: age [1.54 (1.04–1.28), p = 0.009], dyslipidemia [19.8 (1.35–301.1), p = 0.031], low iron concentration [0.96 (0.96–0.93), p = 0.048], cyanosis [25.7 (1.60–411.8), p = 0.022], and Down syndrome [46.8 (8.09–2710), p = 0.003]. During a follow-up time of 6.8 (1.2–10.5) years, cardiovascular mortality occurred in 31 patients with CHD showing, through the Kaplan–Meier test, a worse outcome among patients with CKD (p < 0.05) as was also seen in the univariate Cox regression survival analysis. However, after adjusting for other variables, this significance was lost, with age remaining as the unique independent prognostic factor. Conclusions: The prevalence of CKD was much higher in patients with CHD than in the control group; age, cyanosis, and Down syndrome were the predictors of a higher risk of CKD among CHD patients. Although CKD was associated with worse survival in CHD patients, only age was identified as an independent prognostic factor for cardiovascular mortality.
A Comparative Analysis of Carlevale IOL Versus Artisan IOL Implantation Using a Scleral Tunnel Incision Technique
Authors: Obergassel Justus , Heiduschka Peter , Alten Florian , Eter Nicole , Clemens Christoph R.
Published: November 2024

Background: The aim of this retrospective study was to compare the surgical and refractive outcomes using the Carlevale IOL (FIL SSF; SOLEKO) with those of the retropupillary-fixated Artisan IOL (Aphakia Model 205; OPHTEC), implanted through a 6 mm sclerocorneal tunnel incision in both groups. Methods: This study included 51 consecutive eyes (25 Carlevale and 26 Artisan IOLs). Due to complex preoperative conditions (e.g., dislocated polymethylmethacrylat IOL, luxated Cataracta rubra), all patients underwent lens explantation using a standardized 6 mm sclerocorneal tunnel incision and a 23 G or 25 G pars plana vitrectomy. Visual acuity (VA), spherical equivalent, refractive prediction error (PE), incision-suture time, and complication rates were recorded preoperatively and during the follow-up period. Results: The average follow-up period was 40.9 ± 5.7 days. VA improved by 0.28 ± 0.39 logMAR (p < 0.0001) in the Carlevale group and by 0.36 ± 0.47 logMAR (p < 0.0001) in the Artisan group. The improvement was comparable between both groups (p = 0.921). The deviation of the PE was −0.67 ± 0.56 in the Carlevale group and 0.34 ± 0.71 in the Artisan group (p < 0.0001). The mean incision-suture time was 42.5 ± 5.8 min in the Carlevale group and 28.2 ± 6.4 min in the Artisan group. Anterior chamber and vitreous hemorrhages were the most common complications, occurring in 12% in the Carlevale group and 17.2% in the Artisan group. Conclusions: The use of the Carlevale IOL, implanted using a sclerocorneal tunnel technique, presents a valid option for treating complex lens dislocations. The scleral fixation of the Carlevale IOL minimizes risks associated with iris fixation, such as chronic inflammation and pupil distortion, making it particularly suitable for patients with damaged irises.
Skin Markers of Premature Ageing in Patients with COPD: Results Form COSYCONET
Authors: Melzer Thomas , Graf Veronika , Kronseder Angelika , Karrasch Stefan , Kerschner Martina , Vogelmeier Claus F. , Bals Robert , Alter Peter , Watz Henrik , Fähndrich Sebastian , Behr Jürgen , Waschki Benjamin , Trudzinski Franziska Christina , Jörres Rudolf A. , Kahnert Kathrin
Published: November 2024

Background: Chronic obstructive pulmonary disease (COPD) is commonly associated with ageing, with the prevalence and severity increasing by age. Smoking-induced premature ageing is thought to contribute to COPD, particularly lung emphysema. This study aimed to explore the relationship between lung function impairment and skin texture, as a marker of biological or premature ageing, in COPD patients. Methods: A subcohort from the COSYCONET COPD-study was analyzed, where skin-relief replicas of the eye’s outer corner and mid-lower inner arm were collected, along with semi-quantitative facial photographs. We examined the correlation between skin parameters and lung function, particularly the diffusing capacity (TLCO) as an indicator of emphysema. Results: Among 46 COPD patients (69 ± 8 years, 52% female), skin texture from the inner forearm, but not from the eye corner, was significantly associated with TLCO% predicted, with a higher skin roughness correlating with a lower TLCO (p = 0.015). This relationship persisted after adjusting for age, BMI, sex, pack years, and smoking status. No significant associations were found with facial photographs. Conclusions: These findings suggest that systemic ageing, reflected in inner arm skin texture, is linked to lung emphysema. Skin ageing markers may be valuable in future interventional studies involving anti-ageing treatments.
Chronic Sarcoidosis: Diagnostic Difficulties and Search for New Criteria of Inflammatory Activity (A Case Report and Literature Review)
Authors: Starshinova Anna , Berg Elizaveta , Rubinstein Artem , Kulpina Anastasia , Kudryavtsev Igor , Kudlay Dmitry
Published: November 2024

Sarcoidosis is a systemic inflammatory disease with an unknown etiology and a wide range of clinical manifestations. The incidence of sarcoidosis ranges from approximately 1 to 15 cases per 100,000 individuals per year worldwide. The significant variability in clinical presentations and target organs, as well as concomitant diseases, greatly complicates diagnosis. We analyzed articles in PubMed, Scopus, Cochrane Library, and Embase, where databases were searched using the keywords “chronic sarcoidosis”, “diagnosis of sarcoidosis”, “course of sarcoidosis”, “pulmonary sarcoidosis”, “cardiac sarcoidosis”, “skin sarcoidosis”, “neurosarcoidosis”, “ocular sarcoidosis”, and “autoimmune inflammation”. Studies on the course and diagnosis of sarcoidosis with a deep search of ten years were included. In this review, we present an analysis of publications on the course and diagnosis of chronic sarcoidosis, as well as a clinical case. We have noted that the diagnosis of chronic sarcoidosis is particularly difficult due to the lack of specific biomarkers or their combination. The development and introduction of new diagnostic criteria for this disease will contribute to increasing the level of efficiency, not only of the diagnostic complex, but also the prognosis of the development and course of the pathological process. Conclusion: For the most accurate diagnosis and determination of prognosis, the existence of a single immunological or imaging marker with sufficient sensitivity and specificity is necessary.
Structural and Sustainability Enhancement of Composite Sandwich Slab Panels Using Novel Fibre-Reinforced Geopolymer Concrete
Authors: Sridhar M. , Vinod Kumar M.
Published: November 2024

One of the important findings of the recent decades in the construction industry is composite sandwich panels (CSPs), which have benefits of being lightweight, providing thermal insulation, and aiding the economy; they are transforming continuously through many add-ons as needed by the industry. With the demand for sustainability in the field, CSPs need structural and sustainable enhancement. In the present study, an approach for the same has been attempted with geopolymer concrete (GPC) and novel nylon fibre to improve the sustainability and structural benefits, respectively. With various material combinations including GPC reinforced with fibres, six CSPs were cast and studied. The inherent limitations of GPC have been addressed by the nylon fibre reinforcement instead of using steel fibres, which have a similar strength, considering the aim of maintaining the density of the wythe material. A comparison of the flexural behaviour of the CSPs through the parameters of load–deflection, ductility, and toughness was made using the four-point loading test. The results of the test specify that the fibres enhance the performance of the CSPs under flexural loading.
Mesoscopic Simulation on Centrifugal Melt Electrospinning of Polyetherimide and Polyarylethernitrile
Authors: Guo Han , Huang Yuzhe , Chen Jia , Huo Hongyu , Peng Gongqiu , Zhang Baoyan , Liu Yong
Published: November 2024

Polyetherimide (PEI) and polyarylethernitrile (PEN) are high–performance materials for various applications. By optimizing their fiber morphology, their performance can be further enhanced, leading to an expanded range of applications in carbon fiber composites. However, developing processes for stable and efficient fiber production remains challenging. This research aims to simulate the preparation of high–performance ultrafine PEI or PEN fibers using electrospinning. A mesoscopic simulation model for centrifugal melt electrospinning was constructed to compare and analyze the changes in molecular chain orientation, unfolding, fiber diameter, and fiber yield under high-voltage electrostatic fields. The simulation results showed that temperature and electric field force had a particular impact on the diameter and yield of PEI and PEN fibers. Changes in rotational speed had negligible effects on both PEI and PEN fibers. Additionally, due to their different molecular structures, PEI and PEN, which have different chain lengths, exhibit varied spinning trends. This study established a mesoscopic dynamic foundation for producing high-performance ultrafine fibers and provided theoretical guidance for future electrospinning experiments.
Utilizing Pistachio Shell Biochar to Replace Carbon Black in Natural Rubber Composites
Authors: Peterson Steven C. , Chisholm Bret J.
Published: November 2024

Biochar is a promising source of renewable carbon that potentially can serve the same purpose as carbon black (sourced from fossil fuels) to reinforce rubber composites. Pistachio shells are a prolific agricultural waste product that is a suitable feedstock for biochar. Unlike many other agricultural residues, pistachio shells are a feedstock that yields biochar with a high concentration of carbon (>80%) and low concentration of ash (<5%), which is necessary to replace carbon black without detrimental effects to the final composite. Filler blends of pistachio shell biochar and carbon black were explored to see how much carbon black could be replaced before composite properties were affected. Pistachio shell biochar was able to replace up to 40% of the carbon black while improving the tensile strength, elongation, and toughness of the rubber composites, but a reduction in modulus was observed. Based on the results obtained, pistachio shell biochar would be suitable for partially replacing carbon black in applications like hoses, seals, belts, and gloves, thereby enabling a new application for this sustainable, agricultural waste product that will help reduce dependence on fossil fuels.
Design by Optimization on the Nozzle and the Stator Blades of a Rim-Driven Pumpjet
Authors: Lugaresi Marco , Villa Diego , Gaggero Stefano
Published: November 2024

The design of the stator and nozzle of a rim-driven pumpjet thruster (RDPJ) is addressed through a simulation-based design optimization approach built on a parametric description of the main geometrical characteristics of the system, a RANS solver with actuator disk model, and a genetic algorithm. As the propeller blades’ geometry is fixed, the rotor/stator (RDPJ-R/S) configuration is considered for the optimal design from a multi-objective optimization process aimed at minimizing the resistance keeping the cavitation inception index at the lowest possible value. Steady-state (moving reference frame plus mixing plane interface) and unsteady simulations (sliding meshes) with fully resolved rotor geometry were finally carried out on six selected optimal geometries to validate the optimization process and the performance improvements provided by the RDPJ configuration when compared with the original rim-driven thruster (RDT).
Design and Development of 10,000-Meter Class Autonomous Underwater Vehicle
Authors: Xu Jiali , Du Zhaopeng , Huang Xianqing , Ren Chong , Fa Shuai , Yang Shaoqiong
Published: November 2024

As a significant subset of unmanned underwater vehicles (UUVs), autonomous underwater vehicles (AUVs) possess the capability to autonomously execute tasks. Characterized by its flexibility, cost-effectiveness, extensive operational range, and robust environmental adaptability, AUV has emerged as the primary technological apparatus for deep-sea exploration and research. In this paper, we present the design of a 10,000 m class AUV equipped with capabilities such as fixed-depth navigation, regional autonomous cruising, full-depth video recording, and temperature and salinity profiling. Initially, we outline the comprehensive design of the AUV, detailing its structural configuration, system components, functional module arrangement, and operational principles. Subsequently, we compute the hydrodynamic parameters using a spatial kinematics model. Finally, the AUV designed in this paper is tested for its functions and performance, such as fixed-depth sailing, maximum speed, and maximum diving depth, and its reliability and practicability are verified.
A Submersible Power Station: Part A Helium Power Conversion Unit
Authors: Serna Jon , Anselmi Palma Eduardo , Romero Stefania , Fouflias Dimitrios , Pilidis Pericles
Published: November 2024

Nuclear power continues to hold great promise in the green revolution, however public opinion regarding its deployment is mixed. A submersible nuclear power station concept is presented here that is expected to allay many concerns that are holding back the growth of nuclear power. This submersible can move under its own power during emergencies and routine maintenance. Being stationed at sea it is earthquake proof. In the case of a tsunami it could decouple from the coast and sail to a location several miles to deeper waters in less than 30 min. Furthermore, it could be built, commissioned, maintained, refueled and scrapped in a country like the UK. This makes it proliferation-proof, a key concern with the wider deployment of nuclear power. In the present evaluation the philosophy and the electric power generation capability of the submersible power station are investigated. This includes a pre-feasibility visualization of the design. An evaluation is carried out into fitting it in a submersible of a size similar to the largest existing nuclear submarines. These designs may enable it to deliver 0.6 to 1 GW of electrical power.
Population Structure and Mating Type Distribution of Cercospora sojina from Soybeans in Indiana, United States
Authors: Cai Guohong , Lopes da Silva Leandro , Piñeros-Guerrero Natalia , Telenko Darcy E. P.
Published: November 2024

Frogeye leaf spot on soybeans is traditionally considered as a southern disease in the United States but its impact in North Central USA has been rising in recent years. In this study, we investigated the population structure and mating type distribution in the C. sojina population from Indiana, USA. Based on 27 single nucleotide polymorphism markers, 49 multi-locus genotypes (MLGs) were identified in 234 isolates collected from 29 counties in Indiana in 2020. Bayesian analysis grouped the 49 MLGs into three clusters. This grouping was supported by principal coordinate analysis and, in large part, by the unweighted pair group method with arithmetic mean and minimal spanning tree. Only one mating-type idiomorph was found in each isolate and in each MLG. The MAT1-1 idiomorph was found in 22 MLGs and the MAT1-2 idiomorph was found in 27 MLGs. Based on clone-corrected data, the distribution of mating-type idiomorphs did not deviate significantly from 1:1 ratio in Indiana as a whole and in 22 out of 24 counties where two or more MLGs were found. Thirty MLGs contained QoI-resistant isolates and 22 MLGs contained QoI-sensitive isolates, with three MLGs containing both types of isolates. MLG1, the most common MLG with 90 isolates, contained mostly QoI-resistant isolates. Interestingly, MLG1 was also the dominant genotype in the Tennessee population collected in 2015, suggesting that MLG1 has been a dominant genotype in a wider region for many years. Based on the standard index of association (r¯d), the Indiana population as a whole was in significant linkage disequilibrium. However, in five out of 16 counties where three or more MLGs were found, the null hypothesis of linkage equilibrium was not rejected. Tests of linkage disequilibrium between locus pairs showed that 33.3% of locus pairs on the same contigs were in significant disequilibrium and 17.7% of locus pairs on different contigs were in significant disequilibrium. The possibility of a cryptic sexual stage was discussed.
Assessing the Drivers of Corporate Sustainability Performance Disclosures Using the Global Reporting Initiative (GRI) G4 Framework
Authors: Laskar Najul
Published: November 2024

The primary objective of this study is to analyze the factors influencing the corporate sustainability performance disclosures of companies listed on the Bombay Stock Exchange (BSE) using the Global Reporting Initiative (GRI) G4 framework. This research is based on a sample of 434 firms listed on the BSE from 2017 to 2022. According to the content analysis method, the disclosure score of 434 non-financial companies is 79% (approximately), suggesting that, on an average, the sample companies have revealed 79% of the GRI-specified elements in their sustainability reports. The outcomes of the regression models indicate that profitability, firm size, innovation, board size, gender diversity, sustainability committee, and industry type are major drivers of corporate sustainability performance disclosure. Furthermore, research identified significant differences in the determinants of such practices between high-polluting and low-polluting companies. This research aims to elucidate the intricate dynamics affecting corporate sustainability performance by examining a diverse array of concerns. It employs meticulous data analysis to identify critical elements influencing sustainability disclosure. These findings may assist corporate managers, investors, policymakers, and stakeholders in comprehending the critical aspects to consider when formulating strategies that promote sustainability and enhance long-term value maximization.
Exploring the Intersection of Contemporary Management Accounting Practices and Accounting Information Systems: The Impact on Hotel Performance
Authors: Diavastis Ioannis Ε.
Published: November 2024

Contemporary Management Accounting Practices (MAPs) were developed to address the weaknesses of traditional practices and to meet financial managers’ need for accurate and timely information. Consequently, they contribute to optimal decision-making that enhances firms’ efficiency and competitiveness, leading to improved organizational performance. Simultaneously, the success of Accounting Information Systems (AIS) is essential, as they improve the quality of information and reporting. In information- and competition-intensive environments such as the hotel industry, AIS user satisfaction, as an indicator of AIS success, can play a decisive role in the effective use of contemporary MAPs. The purpose of this paper is to explore the relationship between contemporary MAPs usage and hotel performance, and to investigate the moderating role of AIS user satisfaction. Using hierarchical multiple regression analysis, the findings indicate that the interaction of contemporary MAPs usage and AIS user satisfaction results in improved hotel performance. This study contributes to the current knowledge by developing a framework of the relationship of Management Accounting and Information Technology, through the lens of Contingency Theory and the Information Systems Success Model of DeLone and McLean. Additionally, the findings provide managerial implications for financial managers and IS developers.
The Relationship Between ESG Scores and Value-at-Risk: A Vine Copula–GARCH Based Approach
Authors: Demartis Stefano , Rogo Barbara
Published: November 2024

Recently, the introduction of Environmental, Social, and Governance (ESG) scores has become crucial for investment decisions and in minimizing portfolio risk. This study aims to understand the relationship between ESG scores and Value-at-Risk (VaR), computed by using a Vine copula–GARCH based approach, chosen for its reliability in detecting interdependencies among multiple stocks. In fact, one of the main challenges in estimating VaR for a stock portfolio is capturing the dependence structure among a large number of assets. The dataset consists of 16 companies listed on the FTSE100 index. The corresponding ESG scores were collected over a comprehensive period of five years, from 2018 to 2022, covering both normal and stressed market conditions. Additionally, a focused analysis was conducted for the period from 2020 to 2022 to isolate the specific effects of the COVID crisis. The results indicate that an increase in assets with the highest ESG scores reduces potential losses in the portfolio. This finding underscores the importance of integrating high-level ESG scores into portfolios to mitigate market risk. Additionally, during periods characterized by stressed market conditions, the impact of ESG scores on VaR is even more pronounced, demonstrating that sustainable assets are more resilient in times of crisis.
Oil Price Shocks and the Canadian Stock Market
Authors: Tan Ruiqi , Dai Wei
Published: November 2024

In this paper, we use monthly data from 1992 to 2022 and a structural VAR model to investigate the effects of oil supply shocks, aggregate demand shocks, and oil-specific demand shocks in the global crude oil market on the Canadian stock market. Our analysis reveals that these shocks affect the S&P/TSX Composite Index and various sector-specific indices in different ways. Specifically, the response of the Canadian market to oil-specific demand shocks diverges notably from the U.S. market, highlighting Canada’s unique position as an oil-exporting country. In the long run, oil price shocks account for over 10% of the variation in the composite index and as much as 35% in the Energy sector index.
Returning to Integrated Landscape Management as an Approach to Counteract Land Degradation in Small Mediterranean Islands: The Case Study of Stromboli (Southern Tyrrhenian Sea, Italy)
Authors: Biasi Rita , Collotti Francesco Valerio , Baia Curioni Stefano
Published: November 2024

The small Mediterranean islands, unique geographical places where coastlines and mountains converge due to volcanic genesis, are among the most threatened environments on Earth. Their marginality, which has historically led to their use as places of detention and punishment, coupled with the extreme climate and rugged geomorphology shaped by terracing practices, has resulted in the loss of systematic land management. This loss stems from the abandonment of cropland in favor of alternative activities and migrations, impacting essential ecosystem services such as the water cycle, soil fertility, and the cultural landscape. The need to counteract the land degradation in these vulnerable areas has been acknowledged for some Mediterranean small islands, including the UNESCO heritage site of Stromboli in the Aeolian Islands, Sicily, Italy—an especially captivating location due to its active volcano. The agricultural abandonment on terraces, intensively cultivated with olives groves and vineyards until the mid-20th century, has rendered the area highly fragile and susceptible to risks such as fires and soil erosion, particularly as a consequence of extreme weather events, as proven in 2022, which saw a destructive fire followed by storms. To mitigate the negative effects of hydrogeological disruptions, the implementation of integrated landscape management—managing ecosystems at the landscape level—has been proposed. Specifically, an agroforestry intervention, coupled with the restoration of dry stone walls, the shaping of soil slopes by recovering the traditional ecological knowledge (TEK), and the design of water-collecting devices incorporated with the traditional hydraulic knowledge, may be proposed as a strategic approach to minimize the soil erosion risks, adapt to climate change, and extensively restore the use of traditional agrobiodiversity to support the local economy and tourism. A pilot intervention by local stakeholders based on these principles is described as an emblematic agrobiodiversity-based landscape design project in a vulnerable area, aiming at the preservation of the cultural landscapes of the small Mediterranean islands.
Research on the Construction and Application of a SVM-Based Quantification Model for Streetscape Visual Complexity
Authors: Zhao Jing , Suo Wanyue
Published: November 2024

Visual complexity is a crucial criterion for evaluating the quality of urban environments and a key dimension in arousal theory and visual preference theory. Objectively quantifying visual complexity holds significant importance for decision-making support in urban planning. This study proposes a visual complexity quantification model based on a support vector machine (SVM), incorporating six key indicators, to establish a mapping relationship between objective image features and subjective complexity perception. This model can efficiently and scientifically predict street view complexity on a large scale. The research findings include the following: (1) the introduction of a new quantification dimension for the urban environment complexity—hierarchical complexity– which reflects the richness of street elements based on an in-depth semantic understanding of images; (2) the established complexity quantification model demonstrates high accuracy, with the indicators ranked by contribution for compression ratio, grayscale contrast, hierarchical complexity, fractal dimension, color complexity, and symmetry; and (3) the model was applied to predict and analyze the visual complexity of the Xiaobailou and Wudadao Districts in Tianjin, revealing that the visual complexity of most streets is moderate, and targeted recommendations were proposed based on different levels of visual complexity.
A Tissue-Engineered Construct Based on a Decellularized Scaffold and the Islets of Langerhans: A Streptozotocin-Induced Diabetic Model
Authors: Sevastianov Victor I. , Ponomareva Anna S. , Baranova Natalia V. , Belova Aleksandra D. , Kirsanova Lyudmila A. , Nikolskaya Alla O. , Kuznetsova Eugenia G. , Chuykova Elizaveta O. , Skaletskiy Nikolay N. , Skaletskaya Galina N. , Nemets Evgeniy A. , Basok Yulia B. , Gautier Sergey V.
Published: November 2024

Producing a tissue-engineered pancreas based on a tissue-specific scaffold from a decellularized pancreas, imitating the natural pancreatic tissue microenvironment and the islets of Langerhans, is one of the approaches to treating patients with type 1 diabetes mellitus (T1DM). The aim of this work was to investigate the ability of a fine-dispersed tissue-specific scaffold (DP scaffold) from decellularized human pancreas fragments to support the islets’ survival and insulin-producing function when injected in a streptozotocin-induced diabetic rat model. The developed decellularization protocol allows us to obtain a scaffold with a low DNA content (33 [26; 38] ng/mg of tissue, p < 0.05) and with the preservation of GAGs (0.92 [0.84; 1.16] µg/mg, p < 0.05) and fibrillar collagen (273.7 [241.2; 303.0] µg/mg, p < 0.05). Rat islets of Langerhans were seeded in the obtained scaffolds. The rats with stable T1DM were treated by intraperitoneal injections of rat islets alone and islets seeded on the DP scaffold. The blood glucose level was determined for 10 weeks with a histological examination of experimental animals’ pancreas. A more pronounced decrease in the recipient rats’ glycemia was detected after comparing the islets seeded on the DP scaffold with the control injection (by 71.4% and 51.2%, respectively). It has been shown that the DP scaffold facilitates a longer survival and the efficient function of pancreatic islets in vivo and can be used to engineer a pancreas.
Transformation from D022 to L12 in Al3Ti by Fe Addition for Enhanced Wear Resistance
Authors: Diao Guijiang , Yuan Junfeng , He Anqiang , Zhang Dong , Kumar Aakash , Fang Ranran , Vorobyev Anatoliy , Chen Wengang , Li Dongyang
Published: November 2024

The addition of third elements may help transform brittle D022-structured lightweight Al3Ti to a relatively ductile L12-structured (Al, M)3Ti (where M represents the third elements), thus increasing the ductility at the expense of hardness. Such a transformation could benefit the wear resistance of the alloy due to improved toughness if a proper balance between the hardness and ductility is achieved. In this work, a D022-predominant Al3Ti alloy (S-Al3Ti) and an L12-predominant (Al, Fe)3Ti alloy (S-Al67Ti25Fe8) were fabricated by arc melting. Change in wear resistance, corresponding to a D022-to-L12 transformation, caused by the addition of Fe as a representative third element, was investigated and compared with the wear resistance of a commercial Al-matrix composite reinforced by 30 wt.% SiC particles (S-Al/SiCp) as a reference material. It was observed that wear of the S-Al3Ti resulted from abrasion involving synergistic oxidation, leading to a larger volume loss. In contrast, the softer S-Al67Ti25Fe8 showed enhanced wear resistance, benefiting from improved toughness with reasonable hardness. During the wear testing, both the alloys exhibited better performance than S-Al/SiCp, a well-known lightweight composite. This study highlights that D022-to-L12 transformation enhances wear resistance due to increased toughness which can be adjusted using the addition of a third element.
Development of a Mathematical Model of the Self-Shielded Flux-Cored Arc Surfacing Process for the Determination of Deposition Rate
Authors: Szymura Michał , Czupryński Artur , Ochodek Vladislav
Published: November 2024

The article presents a method of developing a mathematical model of the arc surfacing process performed using the self-shielded flux-cored filler metal wire with the chromium cast iron (Fe15) weld deposit. A three-level design (static, determined, and complete) was used to determine the function of the test object, thus enabling the simulation of deposition rate in relation to wire feed speed and electrode extension. The deposition rate for the specified set of surfacing parameters amounted to between 4.31 kg/h and 11.25 kg/h. The study was also concerned with identifying the effect of the significance level of test factors and interactions between them on the resultant factor, as well as an assessment of the adequacy of the test object function. In relation to significance level α = 0.01, regression coefficients b0, b1, b2, and b11 significantly affected the deposition rate of the surfacing process. Coefficient b22 was significant at a level of 0.40, whereas coefficient b12 was significant at a level of 0.15. The mathematical model presenting the effect of wire feed speed and electrode extension, as well as interactions between them on the deposition rate of the surfacing process, was adequate for the adopted level of significance α = 0.05.
Microstructure and Texture Evolution of X85MnAl29-9 Steel During Aging
Authors: Witkowska Małgorzata , Chronowska-Przywara Kinga , Kowalska Joanna , Zielińska-Lipiec Anna
Published: November 2024

The research presented in this paper is part of a larger project concerning high-manganese alloys with different chemical compositions (mainly in manganese content from 21 to 31 wt.%). The presented examination results concern the analysis of the microstructure and textures in high-manganese X85MnAl29-9 steel, an age-hardenable steel, during aging at 550 °C for various times. X85MnAl29-9 steel was first hot rolled and subsequently cold rolled up to a 30% reduction. The samples were aged after deformation at 550 °C for various times in an argon atmosphere and cooled in air. The studies include X-ray phase analysis, texture measurement and observation of the microstructure by light microscopy, transmission electron microscopy (TEM) and scanning electron microscopy (SEM), as well as microhardness measurement. Research using scanning and transmission electron microscopy identified carbides in the analyzed samples. The results indicate that, when aging takes place, precipitation of κ′-carbide in an austenitic matrix and carbide κ at grain boundaries occurs. The appearance of satellites on diffraction patterns suggests that (Fe, Mn)3AlC nano-carbides are formed within the austenite matrix by a spinodal decomposition mechanism after the alloy is subjected to long-term aging, which is a key element for structure analysis in the design of safety systems. The use of shorter aging times (up to 24 h) leads to an increase in hardness caused by the precipitation of small κ′-carbide particles in the matrix. However, long aging times (100 h) lead to an increase in the precipitation of the carbide phase (κ and κ′), i.e., the steel becomes overage, which results in a decrease in hardness.
Research on the Reusability of Bentonite Waste Materials for Residual Chlorine Removal
Authors: Andriulaityte Ieva , Valentukeviciene Marina , Zurauskiene Ramune
Published: November 2024

Recyclable construction waste can be used as a low-cost material to reduce stormwater pollution caused by various pollutants. In recent years, studies have reported increased water contamination from chlorine and chlorine compounds and its negative impact on aquatic ecosystems. When assessing the need for waste recycling, circularity, and stormwater reuse, it is worth evaluating the capacities of construction waste materials to reduce stormwater pollution from residual chlorine. Laboratory experiments using bentonite waste material (bentonite clay) and sodium hypochlorite solutions were carried out to analyze the potential of bentonite clay to retain residual chlorine in stormwater and evaluate its capacity to be applied as filtration media in green infrastructure. In the first stage, the particle size distribution and texture of bentonite clay were assessed using laboratory sieve analysis and microscopy. The results of the experiments indicated that the optimal grain size to retain pollutants was 0.8–2.0 mm. The microstructure analysis showed the capacity of bentonite to retain residual chlorine. The results of the static and dynamic experiments (leaching and filtration tests) show that the bentonite clay retained up to 44% of the residual chlorine. The obtained results indicate that bentonite clay might be suitable for application as filtration media in green infrastructure to reduce stormwater contamination.
Isoptic Point of the Non-Cyclic Quadrangle in the Isotropic Plane
Authors: Jurkin Ema , Horvath Marija Šimić , Volenec Vladimir
Published: November 2024

We study the non-cyclic quadrangle ABCD in the isotropic plane and its isoptic point. This is a continuation of the research carried out in a few previous papers. There, we put the non-cyclic quadrangle in the standard position, which enables us to prove its properties using a simple analytical method. In the standard position, the special hyperbola xy=1 is circumscribed to the quadrangle. Hereby, we use the same method to obtain several results related to the isoptic point of the non-cyclic quadrangle. The isoptic point T is the inverse image of points A′, B′, C′, D′ with respect to circumcircles of BCD, ACD, ABD, ACD, respectively, where A′, B′, C′, D′ are isogonal points to vertices A, B, C, D with respect to triangles BCD, ACD, ABD, ACD. The circumircles are seen from T under the equal angles. Our analysis is motivated by the Euclidean results already published in the literature.
Optimal Tax Trajectory of a Commercial Organisation: Economic and Mathematical Approach
Authors: Zakharova Kristina Alekseyevna , Muravyev Danil Anatolyevich , Ponkratov Vadim Vitalievich , Degtyaryova Ekaterina Vladimirovna
Published: November 2024

The aim of this study is to form a new concept of tax burden calculation—optimal tax trajectory, which meets the needs of economic entities in view of the optimisation of tax payments and state authorities in terms of budget replenishment and subsequent efficient spending of state resources. The presented concept is developed on the basis of mathematical modelling of related economic processes. The model is based on the differential equation. An attempt is made to analyse the impact of building an optimal tax trajectory on the efficiency of the organisation’s activity. It shows that it is possible to increase the tax burden on economic entities in order to replenish the revenue part of the budget, which does not affect their financial situation. The proposed approach expands the instrumental apparatus for calculating tax payments from the position of taxpayers and fiscal authorities. The construction of the optimal tax trajectory facilitates the adoption of point decisions concerning the increase or decrease of the tax burden of an economic entity in mutual account with the factors of the macroeconomic conjuncture. This approach allows for managing the revenue part of the budget and redistributing it later to solve social problems or overcome business downturns.
Extension of the First-Order Recursive Filters Method to Non-Linear Second-Kind Volterra Integral Equations
Authors: Heyd Rodolphe
Published: November 2024

A new numerical method for solving Volterra non-linear convolution integral equations (NLCVIEs) of the second kind is presented in this work. This new approach, named IIRFM-A, is based on the combined use of the Laplace transformation, a first-order decomposition, a bilinear transformation, and the Adomian decomposition. Unlike most numerical methods based on the Laplace transformation, the IIRFM-A method has the dual advantage of requiring neither the calculation of the Laplace transform of the source function nor that of intermediate inverse Laplace transforms. The application of this new method to the case of non-convolutive multiplicative kernels is also introduced in this work. Several numerical examples are presented to illustrate the great flexibility and efficiency of this new approach. A concrete thermal problem, described by a non-linear convolutive Volterra integral equation, is also solved numerically using the new IIRFM-A method. In addition, this new approach extends for the first time the field of use of first-order recursive filters, usually restricted to the case of linear ordinary differential equations (ODEs) with constant coefficients, to the case of non-linear ODEs with variable coefficients. This extension represents a major step forward in the field of recursive filters.
Fuzzy Coalition Graphs: A Framework for Understanding Cooperative Dominance in Uncertain Networks
Authors: Rao Yongsheng , Ponnusamy Srinath , Raman Sundareswaran , Khan Aysha , Shafi Jana
Published: November 2024

In a fuzzy graph G, a fuzzy coalition is formed by two disjoint vertex sets V1 and V2, neither of which is a strongly dominating set, but the union V1∪V2 forms a strongly dominating set. A fuzzy coalition partition of G is defined as Π={V1,V2,⋯,Vk}, where each set Vi either forms a singleton strongly dominating set or is not a strongly dominating set but forms a fuzzy coalition with another non-strongly dominating set in Π. A fuzzy graph with such a fuzzy coalition partition Π is called a fuzzy coalition graph, denoted as FG(G,Π). The vertex set of the fuzzy coalition graph consists of {V1,V2,⋯,Vk}, corresponding one-to-one with the sets of Π, and the two vertices are adjacent in FG(G,Π) if and only if Vi and Vj are fuzzy coalition partners in Π. This study demonstrates how fuzzy coalition graphs can model and optimize cybersecurity collaborations across critical infrastructures in smart cities, ensuring comprehensive protection against cyber threats. This study concludes that fuzzy coalition graphs offer a robust framework for optimizing collaboration and decision-making in interconnected systems like smart cities.
Assessing the Effectiveness of A-PRF+ for Treating Periodontal Defects: A Prospective Interventional Pilot Study Involving Smokers
Authors: Stefanescu Ada , Cocoș Dorin Ioan , Topor Gabi , Lupu Fabian Cezar , Forna-Agop Doriana , Earar Kamel
Published: November 2024

Background and Objectives: This study aimed to evaluate the effects of advanced platelet-rich fibrin (A-PRF+) tissue regeneration therapy on clinical periodontal parameters in non-smokers and smoker patients. The anticipated biological mechanisms of A-PRF+ include stimulating angiogenesis, thereby promoting the formation of new blood vessels, which is essential for tissue healing. Additionally, A-PRF+ harnesses the regenerative properties of platelet-rich fibrin, contributing to the repair and regeneration of periodontal tissues. Materials and Methods: The study was conducted on 55 patients, divided into two groups: non-smoker patients (n = 29) and smoker patients (n = 26). A single operator conducted the surgical procedure. Following the administration of local anesthesia with articaine 4% with adrenaline 1:100,000 precise intracrevicular incisions were made, extending towards the adjacent teeth, until the interproximal spaces, with meticulous attention to conserving the interdental gingival tissue to the greatest extent possible. Extended, full-thickness vestibular and oral flaps were carefully lifted, and all granulation tissue was meticulously removed from the defect without altering the bone contour. After debridement of the defects, A-PRF+ was applied. BOP (bleeding on probing), PI (plaque index), CAL (clinical attachment loss), and probing depth (PD) were determined at baseline and six months post-surgery. Results: Significant reductions were observed in PD and CAL after six months. In the non-smokers group, PD decreased from 7.0 ± 1.0 mm to 3.1 ± 0.1 mm (p < 0.001), while in the smokers group, PD decreased from 6.9 ± 1.1 mm to 3.9 ± 0.3 mm (p < 0.001). CAL decreased in the non-smokers group from 5.8 ± 0.7 mm to 2.6 ± 0.2 mm and from 5.7 ± 0.9 mm to 3.2 ± 0.2 mm (p < 0.001) in smokers. Notably, the reductions in CAL and PD were statistically more significant in the non-smokers group. Conclusions: Even though the clinical periodontal improvements were considerable in smoker patients, they did not reach the level observed in non-smoker patients.