bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pineapple fruit residue-based nanofibre composites: Preparation and characterizations
Authors: Jayaprakash Sajithkumar K. , Chellappan Suchith , Prasannan Sruthi A. , Padil Vinod V. T. 
Published: September 2023

Abstract
Natural fibre composites are widespread for being eco-friendly and having unique properties. This study prepared nanocomposites by water evaporation using cellulose nanofibres (CNFs) as fillers and natural rubber (NR) latex as the matrix. Here, CNFs were extracted from the “pineapple fruit residue,” a waste material in juice industries. These fibre-reinforced nanocomposites were prepared under three different weight/volume percentages (5%, 10%, and 15%) and analysed for their mechanical and thermal properties. Furthermore, the morphology and distribution of CNFs in the NR matrix were examined by scanning electron microscopy and Fourier transform-infrared (FT-IR) analysis. The study found that CNFs were randomly oriented and evenly distributed in the nanocomposite. CNFs were detected by FT-IR spectroscopy in the NR matrix, as indicated by absorption peaks at 1,033 and 1,057 cm−1. Thermogravimetric analysis reveals increased thermal stability with more CNFs. Tensile strength and elastic modulus also increase. Pineapple fruit residue-based CNFs enhance mechanical and thermal properties of NR composites and can be considered an ideal natural reinforcing material.
Numerical analysis of various shapes of lozenge pin-fins in microchannel heat sink
Authors: Haque Injamamul , Alam Tabish , Yadav Jagmohan , Gupta Naveen Kumar , Haque Siddiqui Md Irfanul , Siddiqui Tauseef Uddin , Ali Naushad , Srivastava Shivam , Yadav Anil Singh , Sharma Abhishek , Khargotra Rohit , Thakur Amit Kumar 
Published: September 2023

Abstract
Higher density heat flux is the major cause of damage to the electronic component; therefore, cooling such components are of the utmost importance to operate in a safe zone and to increase their life. For this purpose, Microchannel heat sinks (MHSs) are among the most practical methods for dissipating unwanted heat. In this regard, the novel lozenge-shaped pin-fins in the flow passage of the microchannel heat sink (MHS) have been designed and proposed to achieve higher cooling performance. Aspect ratios (λ = 0.30, 0.39, 0.52, 0.69, 1.00) of several lozenge-shaped pin-fins have been used into the design of MHS to investigate their impact on heat transmission and fluid flow characteristics. A three-dimensional model of MHS with a lozenge-shaped has been generated and simulated numerically in the following range of Reynolds numbers, starting from 100 to 900. Heat transmission and flow characteristics have been presented and discussed in detail. It has been found that introducing lozenge-shaped pin-fins in MHS has greatly improved cooling performance. The highest improvement in Nusselt number has been observed when aspect ratio (λ) of lozenge-shaped pin-fins was 1.00. The Nusselt number have been varied in the following ranges of 6.96–12.34, 6.97–12.72, 7.01–13.62, 7.09–14.43, and 7.12–15.26 at λ = 0.30, λ = 0.39, λ = 0.52, λ = 0.69, and λ = 1.0, respectively. In addition, a study of the thermohydraulic performance of the proposed lozenge-shaped pin-fins in the MHS found that this design is an effective means of lowering operating temperature.
A comparative analysis of two cases of language death and maintenance in post-Islam Egypt and Great Khorāsān: reasons and motives
Authors: Dehghan Farzaneh , Dehghan Masoumeh , Farkhondehzadeh Mahboobeh 
Published: September 2023

Abstract
This paper compares two areas of Egypt and Khorāsān in post-Islamic era regarding the loss and maintenance of their mother tongues. While in Egypt, Coptic was gradually removed from both formal and colloquial usages, in Khorāsān, Persian (Farsi or Parsi Dari), though was out of official and governmental services for more than two centuries, was able to finally maintain its status. The most important reason found behind this difference can be attributed to the independence seeking movements in Khorāsān (e.g. Sho’ūbieh), leading to the establishment of the first post-Islamic independent Iranian governments who supported the revival of Iranian culture and the maintenance of Persian language. Secondly, the migration of Arab tribes and the Arabization of the conquered societies were more successful in Egypt compared to Eastern Iran, which changed the demographic composition of Egypt. Moreover, the role of Persian-speaking epic poets, the social class of dihgāns in Iranian society and the fact that Coptic was not as old a language as Persian are other important reasons. It is argued that language maintenance can happen better in cases where top–down governmental and institutional support exists.
Stem cell therapy in sports medicine: current applications, challenges and future perspectives
Authors: Palermi Stefano , Gnasso Rossana , Belviso Immacolata , Iommazzo Irene , Vecchiato Marco , Marchini Andrea , Corsini Alessandro , Vittadini Filippo , Demeco Andrea , De Luca Mariarosaria , Tarantino Domiziano , Romano Veronica , Sacco Annamaria , Sirico Felice 
Published: September 2023

Abstract
Stem cells have demonstrated significant potential for tissue repair and regeneration, making them a promising therapeutic avenue in sports medicine. This review aims to provide a comprehensive overview of the current state of research on the application of stem cells in sports medicine. We will discuss the types of stem cells used, their mechanisms of action, and the clinical outcomes of stem cell therapy in different sports-related injuries. Furthermore, we will delve into the challenges and ethical considerations associated with stem cell therapy, as well as future directions and potential applications of stem cells in sports medicine.
The Systematic Unity of Reason and Empirical Truth in Kant’s

Critique of Pure Reason
Authors: Spagnesi Lorenzo 
Published: September 2023

Abstract
This paper attempts a reconstruction of reason’s contribution to empirical truth in connection with Kant’s definition of truth as the agreement of cognition with its object. I argue that Kant’s treatment of truth in the Transcendental Analytic is completed in the Appendix to the Transcendental Dialectic with an often neglected but compelling argument (what I shall call the Variety Argument). This argument postulates such a variety among appearances as to undermine any attempt to formulate empirical truths. Crucially, I argue that this variety does not depict an extreme scenario, but rather our own epistemic situation in the absence of reason. Reason completes Kant’s theory of truth by allowing the understanding (i) to form empirical concepts and (ii) to approximate empirical truth.
Opening graves and turtles. The pond turtle (Emys orbicularis L.) from the cemetery of the Wielbark Culture in Czarnówko and the question of post-funeral interferences in the past
Authors: Skóra Kalina 
Published: September 2023

Abstract
In 2010, the remains of a pond turtle were discovered at the bottom of a secondary pit (“robbery” trench) in one of the graves (feature 963) in the Wielbark Culture cemetery at Czarnówko (PL). This paper attempts to characterise the find from Czarnówko in the context of two important questions: the opening of graves and the presence of turtle remains in the grave against the background of similar finds from the Central and East European Barbaricum. The problem of post-burial manipulation affects about 90 % of the graves in the cemetery at Czarnówko. The situation from grave 963 finds analogies in the burial grounds of the Masłomęcz Group, the Chernyakhiv culture and the Sarmatian and Longobard sites. The problem of the presence of these reptiles in the graves is related as it turns out to the phenomenon of grave opening, a phenomenon of great territorial and chronological extent observed in the areas where inhumation was practised during the Roman Period and the Migration Period.
Cova Dones: a major Palaeolithic cave art site in eastern Iberia
Authors: Ruiz-Redondo Aitor , Barciela Virginia , Martorell Ximo 
Published: September 2023

ABSTRACTThis article presents details of the recent discovery of Palaeolithic cave art in Cova Dones, Valencia. The preliminary results reveal a rich graphic assemblage with features that are unusual for Mediterranean Upper Palaeolithic art and were previously unknown for the Pleistocene in the eastern Iberian coast.
Time-Saving Versus Time-Efficient Training Terminology, Methods, and Prescription
Authors: Bonder Ian J. , Waller Michael , Shim Andrew L. , Tangeman Marc A. 
Published: September 2023

ABSTRACTA common obstacle to achieving recommended physical activity and desired training goals is time. This is true for recreationally trained adults and athletes, particularly at the collegiate level, where greater restrictions on practice time and training are in place. One possible solution is to implement time-saving and time-efficient training routines and methods that may limit the amount of time needed to attain desired physiological adaptations—by decreasing the time needed to train and/or by increasing the frequency with which brief workouts are completed throughout the week (e.g., “microdosing”). To provide the most optimal training stimulus, the correct method must be used. Unfortunately, numerous terms describe routines and methods discussed in the current body of available literature, many of which may seem similar and lead to confusion. The purpose of this article is to outline the similarities and differences of the numerous time-saving and time-efficient training routines and methods. Ultimately, this article synthesizes the current research into practical recommendations as programming options for strength and conditioning coaches and personal trainers. The information provided may also serve as a foundation for future research opportunities in time-saving and time-efficient training.
A Novel Needle Mouse Model of Vascular Cognitive Impairment and Dementia
Authors: Weng Zhongfang , Cao Catherine , Stepicheva Nadezda A. , Chen Fenghua , Foley Lesley M. , Cao Sarah , Bhuiyan Mohammad Iqbal H. , Wang Qingde , Wang Yuan , Hitchens T. Kevin , Sun Dandan , Cao Guodong 
Published: September 2023

Bilateral common carotid artery (CCA) stenosis (BCAS) is a useful model to mimic vascular cognitive impairment and dementia (VCID). However, current BCAS models have the disadvantages of high cost and incompatibility with magnetic resonance imaging (MRI) scanning because of metal implantation. We have established a new low-cost VCID model that better mimics human VCID and is compatible with live-animal MRI. The right and the left CCAs were temporarily ligated to 32- and 34-gauge needles with three ligations, respectively. After needle removal, CCA blood flow, cerebral blood flow, white matter injury (WMI) and cognitive function were measured. In male mice, needle removal led to ∼49.8% and ∼28.2% blood flow recovery in the right and left CCA, respectively. This model caused persistent and long-term cerebral hypoperfusion in both hemispheres (more severe in the left hemisphere), and WMI and cognitive dysfunction in ∼90% of mice, which is more reliable compared with other models. Importantly, these pathologic changes and cognitive impairments lasted for up to 24 weeks after surgery. The survival rate over 24 weeks was 81.6%. Female mice showed similar cognitive dysfunction, but a higher survival rate (91.6%) and relatively milder white matter injury. A novel, low-cost VCID model compatible with live-animal MRI with long-term outcomes was established.SIGNIFICANCE STATEMENTBilateral common carotid artery (CCA) stenosis (BCAS) is an animal model mimicking carotid artery stenosis to study vascular cognitive impairment and dementia (VCID). However, current BCAS models have the disadvantages of high cost and incompatibility with magnetic resonance imaging (MRI) scanning due to metal implantation. We established a new asymmetric BCAS model by ligating the CCA to various needle gauges followed by an immediate needle removal. Needle removal led to moderate stenosis in the right CCA and severe stenosis in the left CCA. This needle model replicates the hallmarks of VCID well in ∼90% of mice, which is more reliable compared with other models, has ultra-low cost, and is compatible with MRI scanning in live animals. It will provide a new valuable tool and offer new insights for VCID research.
Molecular mechanisms of TWIST1‐regulated transcription in EMT and cancer metastasis
Authors: Yu Xiaobin , He Tao , Tong Zhangwei , Liao Lan , Huang Shixia , Fakhouri Walid D , Edwards Dean P , Xu Jianming 
Published: September 2023

AbstractTWIST1 induces epithelial‐to‐mesenchymal transition (EMT) to drive cancer metastasis. It is yet unclear what determines TWIST1 functions to activate or repress transcription. We found that the TWIST1 N‐terminus antagonizes TWIST1‐regulated gene expression, cancer growth and metastasis. TWIST1 interacts with both the NuRD complex and the NuA4/TIP60 complex (TIP60‐Com) via its N‐terminus. Non‐acetylated TWIST1‐K73/76 selectively interacts with and recruits NuRD to repress epithelial target gene transcription. Diacetylated TWIST1‐acK73/76 binds BRD8, a component of TIP60‐Com that also binds histone H4‐acK5/8, to recruit TIP60‐Com to activate mesenchymal target genes and MYC. Knockdown of BRD8 abolishes TWIST1 and TIP60‐Com interaction and TIP60‐Com recruitment to TWIST1‐activated genes, resulting in decreasing TWIST1‐activated target gene expression and cancer metastasis. Both TWIST1/NuRD and TWIST1/TIP60‐Com complexes are required for TWIST1 to promote EMT, proliferation, and metastasis at full capacity. Therefore, the diacetylation status of TWIST1‐K73/76 dictates whether TWIST1 interacts either with NuRD to repress epithelial genes, or with TIP60‐Com to activate mesenchymal genes and MYC. Since BRD8 is essential for TWIST1‐acK73/76 and TIP60‐Com interaction, targeting BRD8 could be a means to inhibit TWIST1‐activated gene expression.
Analysis of the thermal shock and fouling resistance of the Kalimantan zircon based hybrid composite ceramic coating in boiler environment
Authors: Lestari Yulinda , Zulfia Anne , Ardin Muhammad , Chandra Septian Adi , Widyawati Fauzi , Mabruri Efendi 
Published: September 2023

Power plant boilers operate at relatively high temperatures and pressures. As they are prone to material degradation, fouling and scaling, the materials used must have good thermal and chemical resistance. Coating material is one of the solutions to problems that exist in boilers. In this study, the basic coating material used came from local mineral resources, namely Kalimantan zircon sand and zirconia that had been purified from zircon sand. And there is the addition of filler as a coating reinforcement so that the coating properties become better. The variables of this study are variations of filler materials that have lubricating properties such as hBN, MoS2, graphite and a mixture of the three fillers (hybrid). The coating method used is slurry spray coating and then sintering at 600 °C. The main coating parameter tests carried out were thermal shock and anti-fouling resistance. From the research results, it was found that the purification of Zircon Sand resulted in an increase in Zirconia content from 59 % to 68 %. From the results of the thermal shock resistance and anti-fouling tests, it was found that the coating with purified zircon has better thermal shock resistance while the fouling resistance is not significantly different from unrefined zircon sand, so it is necessary to develop a zircon purification process to obtain a higher ZrO2 content. For filler variations, the hybrid filler produces a coating with better thermal shock and anti-fouling resistance so that it can be used for optimizing ceramic composite coatings
Improving the work process efficiency of a tillage module for pre-sowing tillage
Authors: Aliiev Elchyn , Tesliuk Hennadii , Zolotovska Olena , Puhach Andrii , Boiko Vladyslav , Kobets Oleksandr 
Published: September 2023

The formation of a differentiated structure of the arable horizon during the pre-sowing processing of the grant is a relevant task that can be solved by designing appropriate soil-processing technical means.
A scientific hypothesis has been put forward, according to which increasing the efficiency of the process of forming a differentiated structure of the arable horizon can be achieved by improving the design and substantiating the structural and technological parameters of the tillage module for pre-sowing tillage. Numerical simulation was carried out in the Simcenter STAR-CCM+ software package using the Lagrangian multiphase model employing the discrete element method. Calculation of second-order regression equations and statistical processing of the obtained data was carried out in the Wolfram Cloud software package.
As a result of the simulation of the improved design of the tillage module, which includes one drum, plowshare, casing, and cleaner, it was found that it performs the operation of separation and redistribution of soil aggregates with almost the same efficiency as the basic design with 2 drums and plowshare.
As a result of the simulation of the work process of the improved tillage module, regression equations of the content of the 10–30 mm fraction in the 0–4 cm soil layer and the content of the 0–10 mm fraction in the 4–8 cm soil layer from the research factors were obtained. The chosen factors of influence were a casing outlet clearance, casing inlet clearance angle, cleaner inclination angle, drum rotation frequency, unit movement speed, and processing depth. Solving the problem of multi-criteria optimization, the rational structural and technological parameters of the tillage module for pre-sowing tillage were calculated
Determining the frequency of transverse oscillations of an elastically fixed disk of a circular saw
Authors: Dziuba Lidiia , Chmyr Oksana , Menshykova Olha , Lishchynska Khrystyna 
Published: September 2023

The object of the study is a circular saw blade. An annular plate of constant thickness with a free outer contour and a fixed inner contour was taken as the calculation scheme of the saw blade. The real conditions for fixing the internal circuit correspond to the elastic fixing of the saw blade with clamping flanges on the shaft of the machine. For the accepted calculation scheme of the circular saw, the dynamic model was a fourth-order nonlinear differential equation of the transverse oscillations of the annular plate with the corresponding boundary conditions. The rotation of the circular saw was taken into account in the dynamic model due to the radial force in the middle surface of the ring plate. This force arises as a result of the action of centrifugal forces during the rotation of the saw blade. The solution to the fourth-order nonlinear differential equation was constructed using the Bubnov-Galyorkin numerical method. The boundary conditions for constructing the solution were as follows: the outer contour of the saw disk was considered free; the inner contour of the saw disk – elastically fixed with a certain stiffness coefficient.
The solution was implemented in the Maple 15 mathematical environment in the form of a developed program. According to the obtained frequency equation, the values of cyclic and natural frequencies of transverse oscillations of circular saw disks of different thicknesses with the same radius of the inner contour and three values of the radii of the outer contour were determined: 150 mm, 200 m, and 250 mm. The effect of the rigidity of the internal contour fixing and the angular speed of rotation of the saw blade on the natural frequencies of transverse oscillations was studied. The study was performed for saw disks in the case of oscillations with one, two, and three nodal diameters. It was established that the rigidity of the internal contour of the saw blade has the greatest influence on the natural frequency of transverse oscillations with one nodal diameter
Identifying regularities in the propagation of air ions in rooms with artificial air ionization
Authors: Levchenko Larysa , Burdeina Nataliia , Glyva Valentyn , Kasatkina Natalia , Biliaiev Mykola , Biliaieva Viktoriia , Tykhenko Oksana , Petrunok Tetiana , Biruk Yana , Bogatov Oleg 
Published: September 2023

The object of the study is the dynamics of air ion spread in rooms from the source of artificial air ionization under different starting conditions. There is currently the problem of distribution of air ions in the room with regulatory concentrations in all critical zones. An effective method of ensuring proper air ion concentrations is to model their propagation from ionization sources. Existing approaches to calculating the dynamics of air ions of both polarities have been improved in this study. Unlike known solutions, the impact on their concentration of electrostatic field and the interaction of air ions with suspended particles was taken into account.
A model of air ion propagation in rooms with artificial air ionization and the principles of its numerical modeling was built. The use of Laplace Equation in the aerodynamic model instead of the Navier-Stokes equation for the potential of the flow rate has made it possible to design an "Ion 3D" tool, which reduces the time of implementation of one scenario from several hours to 7 seconds. Modeling of the propagation of air ions of both polarities in the room under different initial conditions was carried out. Two-dimensional and three-dimensional models with their visualization was implemented. The peculiarity of the resulting models is that they make it possible to determine the concentrations of air ions in any section of the room by three coordinates. Given this, the rapid selection of the variants of the source data makes it possible to achieve the normative values of concentrations of air ions in the area of breathing – exceeding 500 cm-3 of each polarity. Simulation makes it possible to design a room in which, under the condition of artificial ionization of air, the concentrations of air ions close to the optimal values of 3000–5000 cm-3 are provided
Improving the efficiency of calcium hydrocarbonate removal and reducing water hardness through discrete pulse energy input
Authors: Obodovych Oleksandr , Sablii Larysa , Sydorenko Vitalii , Tselen Bogdan 
Published: September 2023

For municipal water supply systems, industrial enterprises, and thermal plants, the content of mineral impurities in water is regulated, which necessitates the use of technologies for their removal.
The object of study was water from an artesian well, which was treated on a rotor-pulsation apparatus that implements the principle of discrete-pulse energy input in an aeration-oxidizing setup of rotor type.
The effect of the principle of discrete-pulse energy input on the process of extracting calcium bicarbonate from water to reduce its hardness is studied.
It was determined that when treating water in the rotor-pulsation apparatus without adding ammonium hydroxide solution, it is possible to reduce the calcium ions concentration from 77.1 to 57.1 mg/L, and the total hardness from 13.4 to 7.6 mmol/L. It has been proven that the addition of 0.1 wt.% ammonium hydroxide to the treated water and treatment in the rotor-pulsation apparatus at the flow shear rate of 40·103 s-1 during 10 cycles allows for to reduce in the calcium ions concentration by 99.3 % and to reduce the total hardness to 0.16 mmol/L.
This is explained by the formation of a water-air mixture, which, passing through the rotor-pulsation apparatus, is affected by shock waves, interphase turbulence, microcavitation, and vortices, which leads to an increase in the rate of mass transfer of oxygen from the gas phase to the liquid and its transportation by the liquid. At the same time, the structure of water changes with the formation of free hydrogen bonds, which causes its increased activity and reactive capacity.
Water treatment according to the principle discrete-pulse energy input in the rotor-pulsation apparatus is recommended for use in the implementation of a number of chemical softening methods to reduce the consumption of reagents and increase the degree of purification