bluuebunny/crossref_metadata_2025_split huggingface dataset:
An experimental study on the tensile properties of reinforced asphalt pavement
Authors: Menkash Omaima A. , Joni Hasan H. , Nsaif Maha H. 
Published: April 2024

Abstract
Utilizing one of the most effective new technologies is the primary goal of this research, which uses a combination of bituminous surfacing materials with geotextile reinforcement sheets, to improve the behavior of asphalt mixes and fatigue reduction. The aim of this research is to analyze the impact of woven geotextile upon fatigue characteristics of hot mix asphalt mixtures. In order to improve the tensile qualities of the asphalt pavement, the experimental program for this study includes the application of geotextile within the wearing layer. Marshall fatigue and stability tests were carried out. Four-point bending test in a strain-controlled mode was adopted in this study. Three micro strain levels (250, 400, 750) at a frequency of 5 Hz were used. The findings demonstrated that unreinforced mixtures have a shorter fatigue life than wearing layers reinforced with geotextile. Additionally, exposure to different temperatures (5, 20, 30°C) showed that the performance of the geotextile interlayer system in cold environments is inferior to that of those in warm and moderate climates. The analyzed geotextile has a positive impact on the performance of the pavement and a large potential to extend the life of the pavement as a whole, according to the obtained results of fatigue life.
Extraction and characterization of nano-silica particles to enhance mechanical properties of general-purpose unsaturated polyester resin
Authors: Engidaw Angaw Chaklu , Betelie Araya Abera , Redda Daniel Tilahun 
Published: April 2024

Abstract
Unsaturated polyester resin (UPR) is the most versatile liquid polymer with a wide range of applications in every aspect of the industry but it has low impact strength, low elongation at break, and low toughness. Its mechanical properties can be enhanced with the addition of an optimum percentage of nano-silica fillers by using ASTM polymer test standards, which have been followed by various research groups. For this research, enhanced mechanical properties of the resin have been tested for 0.5, 1, 2, 3, and 4% amount by weight fraction of the nano-silica as fiber nanomaterial. The sugar cane bagasse ash was collected from the Wenji Sugar Factory and extracted with the required size of the particle, which is 10 nm. The ability of extraction is used to manipulate the particle size as the researcher needs. The aim is to determine the enhanced mechanical properties of the UPR by the addition of optimum nano-silica particles. Nanoparticles have the effect of filling porous regions, crack path deflection, and crack bridging capability of the material, which provides good adhesion with the matrix to increase the mechanical properties of composite materials. Experimental result dictates that 0.5% nano-silica addition with 10 nm particle size performs best by enhancing the mechanical properties of composite material up to 30.45% for tensile, 33% for compression, 17.8% for flexural, a slightly 10% improvement for impact test and it shows an overall 27% better performance than the pure UPR. Thermal stability and glass transition temperature were not influenced by the addition of nano-silica.
Ba3Mg4Au4 – a ternary auride composed of BaAu2- and BaMg2Au-related slabs
Authors: Reimann Maximilian Kai , Kösters Jutta , Pöttgen Rainer 
Published: April 2024

Abstract
The ternary auride Ba3Mg4Au4 was synthesized from the elements in a sealed tantalum ampoule. The Ba3Mg4Au4 structure was refined from single-crystal X-ray diffractometer data: Gd3Cu4Ge4 type, space group Immm, a = 447.95(10), b = 843.07(18), c = 1564.2(5) pm, wR2 = 0.0935, 680 F
2 values, 23 variables. Ba3Mg4Au4 is a 1:2 intergrowth structure of BaAu2-(AlB2 type) and BaMg2Au-(MgCuAl2 type) related slabs. The two crystallographically independent gold atoms both have tricapped trigonal prismatic coordination, i.e. Au1@Mg6Ba3 and Au2@Mg2Ba6Au. The Au–Mg (284–303 pm) and Ba–Au (331–349 pm) distances cover small ranges that are close to the sums of the covalent radii. The magnesium atoms in the MgCuAl2-related slab show Mg–Mg distances of 320–332 pm. The different coloring variants of the Gd3Cu4Ge4 type are briefly discussed.
ANÁLISIS ESPACIAL DE LA RED VIAL DE LOS MUNICIPIOS DE LA PROVINCIA DEL TEQUENDAMA EN CUNDINAMARCA COLOMBIA
Authors: Muñoz Rojas ohn Harold , Garzón Vanegas Alba Lucía , Vanegas Luis Fernando 
Published: April 2024

El análisis reticular abarca dos tipos de métricas, las estáticas asociadas a la localización se relacionan con el grado de conexión y descripción de los distintos nodos de la red, por su parte las dinámicas hacen referencia a su funcionalidad en términos de la cohesión, accesibilidad y centralidad (Pérez Solá & Casas Roma , 2014) y Arias , Cardozo , & Parras (2016) investigan sobre la red de transporte público en la ciudad de Resistencia, Provincia del Chaco (Argentina), encuentran que una oferta inequitativa de redes de transporte entorno a la plaza central de Resistencia que se ha traducido en importantes desequilibrios de accesibilidad espacial. El presente trabajo analiza la red vial de la provincia del Tequendama en Cundinamarca, Colombia, conjetura que la configuración y estructura de red vial de la provincia del Tequendama ha condicionado los desequilibrios socio-económicos al interior de la provincia. La metodología aplicada a los elementos que conforman el sistema espacial objeto de estudio son los núcleos urbanos y las conexiones entre ellos, es decir, en términos topológicos, los nodos y enlaces del grafo. Mediante la teoría de grafos, se utilizan medidas de conectividad, accesibilidad y densidad, sobre la red vial de la provincia del Tequendama. Del análisis se obtuvo una imagen relativa de la red vial de la provincia que permite estimar los diferentes escenarios de accesibilidad de la red real frente a la ideal, identificando patrones espaciales que ponen de relieve el grado de fragmentación y desigualdad de la red vial de transporte, que se materializan en diferentes niveles de desarrollo de los municipios.
Cytotoxicity differences from roots and leaves ethanol extracts of annona muricata linn. on HSC-3
Authors: Rizki Naftalia M. , Roeslan Moehamad O. 
Published: April 2024

Objective: The aim of this study is to examine cytotoxicity differences between ethanol extract of A. muricata roots and leaves against HSC-3 cell line.
Material and Methods: HSC-3 cell lines were treated with ethanol extracts of A. muricata roots and leaves with 100, 30, 10, and 1 μg/mL concentrations for 24 hours. The percentage of cell viability was measured using MTT assay.
Results: The results showed significant differences (p <0.001) of treatments group compared to negative control. Ethanol extract of A. muricata roots showed the highest cytotoxicity against HSC-3 cell lines.
Conclusion: There is difference in cytotoxicity between ethanol extracts of A. muricata roots and leaves against HSC-3 cell lines where root extracts showed higher cytotoxicity.
Effect of topical ethanolic extract of noni leaf on post-extraction wound by observation of wound diameter and osteoblast cells
Authors: Sabirin Indah PR. , Kristiana Ris , Khristian Erick , Kustiawan Mas KR. , Yuslianti Euis R. 
Published: April 2024

Objective: The aim of this study is to determine the effect of noni leaf ethanol extract gel on post extraction wound of rabbit teeth observed from wound diameter and osteoblasts cell count. Tooth extraction is one of the treatments performed in the oral region that cause wound. Application of substance or medicine might help accelerate and improve wound healing.
Material and Methods: Twenty-four rabbits divided into three groups: negative control, positive control with 10% povidone iodine, and treatment group with 10% ethanol extract gel of noni leaf. The tooth was extracted from the mandibular left incisor. The diameter of the wound area was examined on day 0, 3, 7, and 14 while the osteoblasts cell count was obtained from rabbits’ specimen in each group on 14th day. Measurement of wound diameter was done by using calipers, while the number of osteoblasts were calculated using toluidine blue histochemistry stain and light microscope with 400x magnification.
Results: The ratio of wound diameter were better in treatment group with significant difference (p=0.048) while osteoblasts cell count were not significantly different among all groups.
Conclusion: Topical application of noni leaf had an effect in decreasing mucosal wound diameter but there was not any evidence yet that it was increased osteoblast cells on socket wound healing process.
LAMA-WAVELET: IMAGE IMPAINTING WITH HIGH QUALITY OF FINE DETAILS AND OBJECT EDGES
Authors: Kolodochka D. O. , Polyakova M. V. 
Published: April 2024

Context. The problem of the image impainting in computer graphic and computer vision systems is considered. The subject of the research is deep learning convolutional neural networks for image inpainting.
Objective. The objective of the research is to improve the image inpainting performance in computer vision and computer graphics systems by applying wavelet transform in the LaMa-Fourier network architecture.
Method. The basic LaMa-Fourier network decomposes the image into global and local texture. Then it is proposed to improve the network block, processing the global context of the image, namely, the spectral transform block. To improve the block of spectral transform, instead of Fourier Unit Structure the Simple Wavelet Convolution Block elaborated by the authors is used. In this block, 3D wavelet transform of the image on two levels was initially performed using the Daubechies wavelet db4. The obtained coefficients of 3D wavelet transform are splitted so that each subband represents a separate feature of the image. Convolutional layer, batch normalization and ReLU activation function are sequentially applied to the results of splitting of coefficients on each level of wavelet transform. The obtained subbands of wavelet coefficients are concatenated and the inverse wavelet transform is applied to them, the result of which is the output of the block. Note that the wavelet coefficients at different levels were processed separately. This reduces the computational complexity of calculating the network outputs while preserving the influence of the context of each level on image inpainting. The obtained neural network is named LaMa-Wavelet. The FID, PSNR, SSIM indexes and visual analysis were used to estimate the quality of images inpainted with LaMa-Wavelet network.
Results. The proposed LaMa-Wavelet network has been implemented in software and researched for solving the problem of image inpainting. The PSNR of images inpainted using the LaMa-Wavelet exceeds the results obtained using the LaMa-Fourier network for narrow and medium masks in average by 4.5%, for large masks in average by 6%. The LaMa-Wavelet applying can enhance SSIM by 2–4% depending on a mask size. But it takes 3 times longer to inpaint one image with LaMa-Wavelet than with LaMa-Fourier network. Analysis of specific images demonstrates that both networks show similar results of inpainting of a homogeneous background. On complex backgrounds with repeating elements the LaMa-Wavelet is often more effective in restoring textures.
Conclusions. The obtained LaMa-Wavelet network allows to improve the image inpainting with large masks due to applying wavelet transform in the LaMa network architecture. Namely, the quality of reconstruction of image edges and fine details is increased.
STEWART PLATFORM DYNAMICS MODEL IDENTIFICATION
Authors: Zozulya V. A. , Osadchy S. І. , Nedilko S. N. 
Published: April 2024

Context. At the present stage, with the current demands for the accuracy of motion control processes for a moving object on a specified or programmable trajectory, it is necessary to synthesize the optimal structure and parameters of the stabilization system (controller) of the object, taking into account both real controlled and uncontrolled stochastic disturbing factors. Also, in the process of synthesizing the optimal controller structure, it is necessary to assess and consider multidimensional dynamic models, including those of the object itself, its basic components, controlled and uncontrolled disturbing factors that affect the object in its actual motion.
Objective. The aim of the research, the results of which are presented in this article, is to obtain and assess the accuracy of the Stewart platform dynamic model using a justified algorithm for the multidimensional moving object dynamics identification.
Method. The article employs a frequency-domain identification method for multidimensional stochastic stabilization systems of moving objects with arbitrary dynamics. The proposed algorithm for multidimensional moving object dynamics model identification is constructed using operations of polynomial and fractional-rational matrices addition, multiplication, Wiener factorization, Wiener separation, and determination of dispersion integrals.
Results. As a result of the conducted research, the problem of identifying the dynamic model of a multidimensional moving object is formalized, illustrated by the example of a test stand based on the Stewart platform. The outcomes encompass the identification of the dynamic model of the Stewart platform, its transfer function, and the transfer function of the shaping filter. The verification of the identification results confirms the sufficient accuracy of the obtained models.
Conclusions. The justified identification algorithm allows determining the order and parameters of the linearized system of ordinary differential equations for a multidimensional object and the matrix of spectral densities of disturbances acting on it under operating conditions approximating the real functioning mode of the object prototype. The analysis of the identification results of the dynamic models of the Stewart platform indicates that the primary influence on the displacement of the center of mass of the moving platform is the variation in control inputs. However, neglecting the impact of disturbances reduces the accuracy of platform positioning. Therefore, for the synthesis of the control system, methods should be applied that enable determining the structure and parameters of a multidimensional controller, considering such influences.
COVID-19-associated frontal bone osteomyelitis. Clinical case and literature review
Authors: Evzikov G. Yu. , Neretin D. Yu. 
Published: April 2024

COVID‑19‑associated osteomyelitis is a purulo‑necrotic complication of past coronaviral infection. The majority of described cases of this complication are caused by Mucorales fungi. Mucormycosis is a severe complication of COVID‑19 associated with high mortality rate. Most commonly it affects maxillary sinuses, facial bones, and orbits. Due to quick progression of the disease, it is important to remember the association between COVID‑19 infection and purulo‑necrotic lesions of the skull that can be complicated by brain involvement.The article presents a very rare observation of COVID‑19‑associated osteomyelitis affecting the squamous part of the frontal bone complicated by formation of bilateral symmetrical subgaleal abscesses in the projection of the frontal eminences.
The 1989 earthquake swarm beneath Mammoth Mountain, California: An initial look at the 4 May through 30 September activity
Authors: Hill D. P. , Ellsworth W. L. , Johnston M. J. S. , Langbein J. O. , Oppenheimer D. H. , Pitt A. M. , Reasenberg P. A. , Sorey M. L. , McNutt S. R. 
Published: April 2024

Abstract
Mammoth Mountain is a 50,000- to 200,000-year-old cumulovolcano standing on the southwestern rim of Long Valley in eastern California. On 4 May 1989, two M = 1 earthquakes beneath the south flank of the mountain marked the onset of a swarm that has continued for more than 6 months. In addition to its longevity, noteworthy aspects of this persistent swarm include (1) an exponential-like increase in the rate of activity through the first month; (2) a vertically oriented, planar distribution of hypocenters at depths between 6 and 9 km with a north-northeast strike (roughly perpendicular to the average T-axis orientation for the swarm earthquakes); (3) recurring spasmodic bursts (rapid-fire sequences of similar-sized earthquakes with overlapping coda) and occasional earthquakes with enhanced low-frequency energy; (4) a uniform temporal distribution of the four largest (M ≈ 3) events over the first 4 months of the swarm with a cumulative seismic moment for the entire sequence through 30 September corresponding to a single M ≈ 4 earthquake; (5) a b-value of 1.2; and (6) submicrostrain perturbations on the nearby borehole dilatometer, the first of which led the onset of swarm activity by more than 2 weeks. These aspects of the swarm, together with its location along the southern extension of the youthful Mono-Inyo volcanic chain, which last erupted 500 to 600 years ago, point to a magmatic source for the modest but persistent influx of strain energy into the crust beneath Mammoth Mountain.
Systematic Literature Review (SLR): Implementation of The Project-Based Learning (PJBL) Approach to Improve Students' Speaking Skills
Authors: Hastuti Dwi , Malihah Noor 
Published: April 2024

ABSTRACT
This systematic literature review (SLR) explores the impact of Project Based Learning (PjBL) on students' speaking skills, drawing insights from qualitative studies. The study identified key themes, increased student engagement, motivation, increased self-confidence, increased fluency and accuracy, and development of critical thinking and problem solving skills. The collaborative nature of PjBL fosters authentic communication among students, contributing to overall language proficiency. This research uses the Systematic Literature Review (SLR) method, which examines 15 national journal articles to comprehensively analyze the existing body of research. A thorough search of electronic databases ensured selection of relevant qualitative research articles. These findings highlight the positive influence of PjBL on students' speaking skills, providing valuable implications for educators, policy makers, and researchers seeking effective strategies for language development in educational contexts.
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Keywords: Systemic Literature Review, Project Based Learning, Speaking Skills.
Investigation of the inhibitory activity of extracts, fractions and secondary metabolites of <i>Silene</i> spp. (Caryophylaceae) and <i>Serratula cupuliformis</i> (Asteraceae) on the «entry» of herpes simplex type 2 into sensitive cells of the Vero line
Authors: Каzachinskaia E. I. , Zibareva L. N. , Filonenko E. S. , Ivanova A. V. , Коnonova Yu. V. , Chepurnov А. A. , Shestopalov A. M. 
Published: April 2024

In vitro analysis of the inhibitory activity of extracts, fractions and secondary metabolites of plants of the genus Silene (Caryophylaceae) and Serratula cupuliformis (Asteraceae) to the «entry» of herpes simplex type 2 (HSV‐2) into sensitive cells of the Vero line.Ethanol extracts and butanol fractions of Silene spp. and Serratula cupuliformis were prepared. The flavonoid shaftoside and the ecdysteroid 20‐hydroxyecdysone from Lychnis chalcedonica were isolated. For analysis of biologically active substances (BAS) the HPLC method was used. The samples were dissolved in distilled water or DMSO. The laboratory strain MS HSV‐2 was grown on Vero cell culture. In vitro analysis of the inhibitory activity of the herbal preparations on «entry» of HSV‐2 was performed in Vero cell culture by direct inactivation (neutralisation) of virions with 103 PFU /ml.Effective concentrations (EC50) have been identified in the range of 50 % from 2.12±0.47 to 180.99±49.24 μg/ml when preparations were dissolved in water and from 1.99±0.44 to 57.42±14.74 μg/ml when they were dissolved in DMSO. Such results for some samples is comparable to the EC50 of comparison preparations (dry ethanol extracts of spice of cloves, chaga and licorice root). The results obtained suggest the presence of BAS in the herbal preparations studied that act destructively on HSV‐2 virions and affect one of the main stages of its «life» cycle – the «entry» of the virus into sensitive cells.
Genetic diversity of hepatitis C virus and the prevalence of resistance mutations to NS5A inhibitors in the Krasnoyarsk region
Authors: Ekushov V. E. , Totmenin A. V. , Gotfrid L. G. , Halikov M. R. , Minikhanova V.-V. V. , Skudarnov S. E. , Ostapova T. S. , Gashnikova N. M. 
Published: April 2024

To research the molecular genetic characteristics of the HCV population circulating among HIV‐infected residents of the Krasnoyarsk Territory, including analysis of resistance‐associated mutations to NS5A inhibitors. Total RNA was isolated from 94 blood plasma samples from HIV/HCVinfected residents of the region and the nucleotide sequences of the Core/E1 gene and NS5A gene regions were obtained and deciphered, which were used for genotyping and searching for resistance mutations.In the HCV samples studied, the circulation of five virus subtypes was recorded: 1b (47,9 %), 3a (37,2 %), 1a (10,6 %), 2a (3,2 %) and 2k (1,1 %). Phylogenetic analysis of HCVs revealed partial clustering within subtypes 1a and 3a on a territorial basis. HCV subtypes 1b, 2a and 2k were grouped with other HCVs previously isolated in Russia, Armenia and Kyrgyzstan. Among the HCVs studied, no clusters were found that were common to HIV‐infected individuals with the same route of infection. Among patients who had no experience of taking DAAs, HCV resistance mutations in the NS5A region were found in 42,3 % of cases for those infected with subtype 3a virus and in 75,6 % of cases for those infected with HCV subtype 1b.The analysis of the diversity and occurrence of mutations of HCV drug resistance to direct antiviral drugs is extremely important for the development of tactics for effective treatment of CHC. The high prevalence of polymorphic mutations that affect sensitivity to DAAs indicates the relevance of introducing HCV resistance analysis into clinical practice.
The first find of the pond bat <i>Myotis dasycneme</i> (Boie, 1825) in Stavropol Territory and western Caucasus, Russia
Authors: Maslov A. A. , Ivanitzky A. N. , Alekseev A. Yu. 
Published: April 2024

The aim of the work was to describe the discovery of a pond bat Myotis dasycneme (Boie, 1825) in the vicinity of Zheleznovodsk, Stavropol Territory, Russia in August 2023.We examined the Letnei Merzloti Cave, an artificial tunnel about 400 metres long with small dead‐end caverns. The pond bat was found in a small dead‐end cavern. This is the first find of this species in the Stavropol region and the third find in the Caucasus.The first finds of the pond bat were made in the Western Caucasus in 1999 and 2003. This find provides more data about a small population of pond bats in the Caucasus. It is noteworthy that this species of bat (M. dasycneme), together with M. daubentonii, are the only known natural wild hosts of the Europian bat lissavirus virus type 2 in Europe. Given the fact that bats are considered natural hosts of all types of coronaviruses, and that the pond bat previously evidenced the circulation of both alpha and beta coronaviruses in the European population (Germany, the Netherlands), we must be aware of the potential of this species as a reservoir of pathogenic zoonotic coronaviruses.