bluuebunny/crossref_metadata_2025_split huggingface dataset:
Concept of Learning Evaluastion of Islamic Religious Education Courses in Public Universities From The Perspective of Syed Muhammad Naquib al- Attas
Authors: Emas Mahardika Putera , Ismail Ismail , Nurhilaliati Nurhilaliati 
Published: December 2024

The background of this research is the issue of PAI courses at public university which is still inadequate. It is felt the determination of PAI courses as national compulsary courses is still not sufficient to achieve its objective or national educational goals. Insufficient study hours, material that still tends to be descriptive, and not beng able to answer student’s personal needs ultimately become a scourge when conducting learning evaluations. Milieu of public university, which differ drastically then lower levels, requiere an appropriate evaluation model. Syed Muhammad Naquib al-Attas, as world-class thinker from Malaysia, has a number of unique educational ideas that can be inspiration, incluidng in terms of evaluation. Moreover, he has directly led a higher education institution which has become a reference for many universities to this day. This research aims to elaborate on the concept of al-Attas learning evaluation in the context of PAI courses at public university. This reasearch shows the the evaluation philosophy and practice carried out by al-Attas could become milestone for reforming the principles and practices of PAI courses at public university, especially in terms of learning evaluation. In order to achieve its objectives, this research uses a library research method, by examining the relevant primary and secondary sources.
Application of Learning Media " Tree Chart" to Improve Student Learning Outcomes for Tarikh Islam Lesson class 3 at Darussalam Modern Islamic Boarding School Gontor Ponorogo
Authors: Anwar Heru Saiful , Mufidah Zuhrotul , Arrouf Mustabshirin , Al-Murtadho Ajib 
Published: December 2024

One of the subject matter contained in Islamic education is Tarikh Islam lessons. Tarikh Islam are one of the required lessons for students to be taught at Darussalam Modern Islamic Boarding School, which is lesson learns about Islamic history including the story of Rasulullah, Khulafaur Rashidin, Companions of Rasulullah and others. In teaching and learning activities, media is one of the important factors in learning. In view of the scores obtained by grade 3 H students in Islamic date lessons, there are 20 out of 37 students or 53% of students who get scores below the passing score standard, it is due to the lack of teachers in providing innovation in learning activities so that students become bored and do not pay attention to the lessons taught. And one of the innovations that can be used is with (Tree Chart) media learning. This study aims to, improve student activeness and learning outcomes in Islamic date subjects Class 3 H at at Darussalam Modern Islamic Boarding School by using Tree Chart learning media. This type of research is Classroom Action Research. In this study, researchers as teaching teachers and assisted by an Observer who supervises the condition of students. This research consists of the first cycle and the second cycle which consists of: Planning, Implementation, Observation, and Reflection. Data collection techniques and tools in this study are using descriptive analysis techniques on data in the form of documentation of student learning outcomes, observation sheets and test results The results of this study show that (1) the application of tree chart learning media can increase student activity. With the presentation value of student activeness in the first cycle which reached 61.37% and increased in the second cycle which reached 84.12% with the presntase there was a difference between the first and second cycles which reached 22.75%. (2) The application of tree chart learning media can improve student learning outcomes. The percentage in the first cycle of students who completed learning was 22 students out of 37 students or reached 59.45% with an average score of 5.91 and in the second cycle as many as 37 students or reached 100% with an average score of 7.78. With the explanation above, it can be concluded that tree chart learning media can increase student activeness and learning outcomes.
Keywords: Student Activeness, Learning Outcomes, Tarikh Islam Lessons, Tree Chart Learning Media
Multi-Pathway Targeted Therapy of MASH-HCC Using miR-22
Authors: Hu Ying , Setayesh Tahereh , Wei Dongguang , Testerman Trenton John Edward , Ji Yutong , Wan Yu-Jui Yvonne 
Published: December 2024

Abstract

Background: The treatment options for hepatocellular carcinoma (HCC) are limited, and there is no effective drug that can improve long-term survival rates. Complicated cocktails consisting of multiple medications with toxicities are frequently used to treat cancer. The current study addresses these knowledge gaps.
Methods: The study uses metabolic dysfunction-associated steatohepatitis (MASH)-HCC and HCC mouse models established by transfecting the livers using myr-AKT1, NRasV12, and Sleeping Beauty transposase. AAV8-miR-22 was delivered to MASH-HCC and HCC to study its preventive and therapeutic effects. Spatial transcriptomic profiling revealed the signaling pathways affected by miR-22 according to histological locations.
Results: miR-22 treatment effectively treated MASH-HCC and HCC. Treating mice with miR-22 before tumor initiation prevented oncogenesis. The promising anti-cancer effects were revealed by reduced tumor load, fibrosis, and splenomegaly, extending the survival time. miR-22 treatment generated anti-tumor immunity. The favorable treatment outcomes were accompanied by a reduction in dendritic cells, T and B cells, and plasma cells, which were expanded inside the tumors of MASH-HCC. In all animal trials, miR-22 improved metabolism and reduced glycolysis inside the tumors. Moreover, miR-22 profoundly inhibited extracellular matrix (ECM) and targeted MET, PDGF, tyrosine kinase signaling, and IGF pathways inside the tumors. Furthermore, the roles of miR-22 in blocking collagen formation and cross-assembly of collagen fibrils could be due to miR-22's effects in inhibiting Rho GTPase pathways, revealed at the tumor margin.
Conclusion: miR-22 generates anti-HCC effects by targeting many critical pathways in liver carcinogenesis in cancer and tumorigenic niches, potentially revolutionizing HCC treatment.
Gravitational field and lensing of a circular chiral vorton
Authors: Putra Leonardus B. , Ramadhan H. S. 
Published: December 2024

Abstract

We derive the metric of a circular chiral vorton in the weak field limit. The object is self-supporting by means of its chiral current. A conical singularity with deficit angle, identical to that of straight string with the same linear mass density, is present at the vorton’s core. We find that the metric is akin to the electromagnetic 4-potential of a circular current wire loop, illustrating the concept of gravito-electromagnetism. Surprisingly we find that the solution asymptotically mimics a Kerr-like naked singularity with mass M v = 4πRµ and spin parameter a = R/2. Finally, we also simulate the gravitational lensing images by solving the corresponding null geodesic equations. This reveals interesting properties of the images, such as the simultaneous creation of a minimally distorted source image and its Einstein ring, as well as the formation of double images on the back side of the ring.
Modified with Boron nitride nanoparticles on polyamide fabrics
Authors: Loktionova I. V. , Abakumov P. V. , Kuzmenko A. P. , Kolpakov A. I. , Novikov E. A. , Mamontov V. A. , Petrova L. P. 
Published: December 2024

Purpose. Investigation of the characteristics of polyamide fabric modified with Boron nitride nanoparticles and evaluation of its filtration properties.Methods. The Raman scattering spectra were measured using a scanning Raman microspectrometer OmegaScope AIST-NT in ZXXZ̅ geometry (λ = 532 nm, W = 25mW) with a spectral resolution of 3 cm-1. The crystalline structure was studied using X-ray diffraction on a GBC EMMA diffractometer (Bragg-Brentano scheme, A = 0.154 nm, step size 0.02°). The filtration properties of the polyamide fabric were investigated using an SF-2000 spectrophotometer in the spectral range of 450-750 nm. The modeling of the interaction between the modified polyamide fabric and inorganic solution molecules was carried out using the Materials Studio 2020 software package with the Forcite module.Results. In the spectra of Raman scattering and X-ray diffraction patterns of fabric modified with Boron nitride nano-particles, peaks were identified at 1360-1 cm and 2θ = 27.32. The size of the coherent scattering regions was 0.65 nm, which corresponds to the doubled interlayer spacing of Boron nitride. The change in optical density of the filtrate through the fabric was ΔD = 0.04, corresponding to a 9.6% increase in transparency. Quantum-mechanical modeling showed that van der Waals forces act between the iron hydroxide molecules and the fabric, while chemical bonds exist between the Iron hydroxide and the Boron nitride nanoparticles.Conclusion. Modification of polyamide fabric using the Langmuir-Blodgett method results in a more intense spectral profile for ordered coatings, while the immersion method with ultrasonic dispersion is suitable for bulk coatings, allowing nanoparticles to penetrate the fabric structure. These results are confirmed by X-ray diffractometry. The effectiveness of Boron nitride in improving the adsorption characteristics of polyamide fabric is also demonstrated.
Deposition of Boron nitride nanoparticles on polyamide fabrics
Authors: Loktionova I. V. , Abakumov P. V. , Kuzmenko A. P. , Kolpakov A. I. , Novikov E. A. , Mamontov V. A. , Petrova L. P. 
Published: December 2024

Purpose of research. Fixation of Boron nitride nanoparticles on polyamide fabric.Methods. Colloidal systems were stirred and dispersed in an ultrasonic bath QUICK 218-35 with an emitter power of 50 W and an ultrasonic technological disperser “Volna” UZTA-0.4/22-OM. The activation of the polyamide fabric surface and its cleaning were carried out by plasma treatment in a low-pressure PICO system. Deposition of nanoparticles using the Langmuir-Blodgett method was performed on a KSV Nima 2002 setup. The morphology and elemental composition of the polyamide fabric before and after the application of boron nitride nanoparticles were studied using a JEOL 6610LV scanning electron microscope equipped with an Oxford Instruments X-Max energy-dispersive X-ray analyzer. The research methodology included the use of a low-vacuum mode, which was important for preventing the accumulation of surface electrical charge on dielectric samples.Results. Sediment-resistant colloidal systems were synthesized based on boron nitride nanoparticles stabilized with stearic acid and an aqueous solution of Boron nitride nanoparticle powder with the addition of an oiling agent. Nano-particles from the first colloidal system were deposited on polyamide fabric using the Langmuir-Blodgett method, while nanoparticles from the second system were applied by immersing the fabric in the system with ultrasonic dispersion. SEM images of the polyamide fabric and its energy-dispersive analysis confirm the uniform fixation of boron nitride nanoparticles on the fibers by these methods.Conclusion. In this work, boron nitride nanoparticles were fixed onto polyamide fabric using the Langmuir-Blodgett method and by immersing the fabric in a colloidal system with ultrasonic dispersion. This allowed for uniform deposition of nanoparticles both on the surface of the polyamide fabric and between the fibers, enhancing its performance characteristics.
Selection of optimal conditions for the spectrophotometric determination of phosphorus in archaeological finds made of cast Iron using reducing agents - ascorbic acid and Mohr salt
Authors: Volkova N. V. , Belousova M. I. , Tyurin S. D. , Kupriyanova E. D. 
Published: December 2024

Purpose of research. The aim of the work was to select conditions for the quantitative spectrophotometric determination of phosphorus in archaeological finds made of Iron using reducing agents - ascorbic acid and Mohr salt.Methods. A fragment of a cast-iron object discovered during archaeological excavations in the Salovsky settlement on the territory of the Penza region was chosen as the object of research. Reagent preparation and spectrophotometric analysis of phosphorus content were carried out in accordance with GOST 2604.4-87 Alloyed cast iron. Methods for the determination of phosphorus. To assess the reliability of the results, errors were identified according to the Smirnov criterion, and to assess the accuracy of the results, the variance, standard deviation and relative standard deviation of the determination of phosphorus content were calculated. To identify the effect of the reducing agent on the results of phosphorus determination, a one-factor analysis of variance was performed.Results. In the course of the work, the conditions for dissolving the samples were selected: the weight of the sample, the required volume of nitric acid, dilution of the samples, the volume of reagents for analysis. An experiment aimed at searching for a reducing agent of the yellow phosphorous-molybdenum complex has demonstrated satisfactory results when using the Mohr salt. The adequacy of replacing ascorbic acid with Mohr salt is proved by the close values of the phosphorus content in the studied samples: using the ascorbic acid reducing agent, the phosphorus content was (1.74.0.15)%, and using Mohr salt (1.72.0.24)%.Conclusion. The results obtained during the study allow us to conclude that the Mohr salt can be used as a reducing agent in the determination of phosphorus in the form of blue heteropolycomplex in iron alloys.
Ensuring the quality indicators of the surface layer of parts made of 30KhGSA steel by laser microstructuring
Authors: Kutepov S. N. , Klementyev D. S. , Spiridonova M. M. 
Published: December 2024

The purpose of the work was to study the influence of laser microstructuring modes on the formation of qualitative indicators (the length of the laser exposure zone, microhardness) of the surface layer of parts made of hot-rolled sheet steel grade 30KhGSA.Methods. The structural medium-alloy steel of the 30KhGSA grade in the hot-rolled state (sheet 6 mm thick) was chosen as the object of research. Special samples were produced by laser cutting to study changes in the structure, structure and microhardness of the laser exposure zone. After laser cutting, one of the sides of the sample was subjected to mechanical milling in order to remove a layer with a modified structure of the material obtained during laser cutting. Next, laser microstructuring of the sample surfaces was performed using a continuous fiber laser. Metallographic and durometric studies were carried out to study the effect of laser microstructuring on changes in the structure and quality of the surface layer.Results. The peculiarities of changing the microstructure of the laser exposure zone depending on the type of laser treatment are considered. It is shown that, regardless of the type of laser treatment, a "white layer" is formed on the heat-strengthened surface, the thickness of which depends on the parameters of laser radiation: power, speed, spot diameter, focal length. It has been revealed that when milling operations are used as a preliminary mechanical treatment of the cutting edge surface, in the vast majority of cases a white layer is not formed.Conclusion. The results obtained can be used to create resource-saving material processing processes using highly concentrated energy flows.
Strengthening the cutter body of a road milling machine by applying an electrospark coating based on VK8 hard alloy
Authors: Kuznetsova L P. , Kuznetsov K. Yu. , Kolmykov V. I. , Pereverzev A. S. , Semenikhin B. A. 
Published: December 2024

The purpose of the study. Development of a technological process for strengthening the body of a road milling cutter by applying an electric spark coating based on VK8 alloy.Methods. Modern techniques and equipment were used to achieve the set goal. The coatings were applied to pre-prepared samples made from the cutter of the KZTS A6/20 road milling machine using the UR-121 electric spark alloying unit.Technological parameters: anode - cutter tip (VK8 hard alloy); cathode - cutter body (structural alloy steel); sparking voltage 70 V; operating temperature 18-20°C; NORMA process mode 100 Hz; vibration amplitude of the vibrator VIBRATION 11; electric processing mode MODE 3.To study the elemental composition and microstructure of the hardening coating, images were taken using an EDAX energy-dispersive X-ray analyzer built into a Quanta 600 FEG scanning electron microscope.Vickers microhardness testing of samples before and after hardening was performed using an AFFRI DM-8 microhardness tester.A Revetest scratch tester was used to test strength, scratch resistance, and determine the mechanism of sample failure.Results. As a result of the experiment, electrospark hardening coatings based on VK8 alloy were obtained on the cutter body of a road milling machine. Recycling of cutter tip waste was carried out by applying wear-resistant coatings to the cutter body of the KZTS A6/20 by the electrospark alloying method. It was found that the hardening coating does not have pores, cracks and other defects, its main elements are Fe, W, Mn, Cr, O. The microhardness of the coating is 1.6 times higher than the microhardness of the substrate. When scratched, the coating on the samples wears off, but there are no delaminations, that is, it is destroyed by the cohesive mechanism.Conclusion. The completed study will allow developing recommendations for the practical application of resource-saving technologies for the restoration and strengthening of road milling cutter bodies and implementing the recycling process.
Investigation of the dependence of the electrical resistance of Iron powder on the compressive force
Authors: Razumov M. S. , Chaplygin R. E. , Glazkov P. V. , Maltsev O. N. 
Published: December 2024

The purpose of the study is to establish the dependence of the electrical resistance of iron powder on the compression force.Methods. The electrical iron powder was placed in a sleeve. The sleeve is tightly closed on both sides by metal pistons protected from external sources of electrical resistance by dielectric spacers. A force F̅ is applied to one of the spacers. The strain gauge measures the amount of applied force, and the ohmmeter records the presence of electrical resistance and its amount in the circuit section. Using this setup, a full factorial experiment was conducted, during which the powder samples were changed, a 7-gram sample was taken, as well as a 14-gram sample, and the above parameters were monitored. In this case, the change in electrical resistance was chosen as an optimization criterion when assessing electrical conductivity in a circuit section.The results of the study showed an empirical dependence of the resistance of electrical iron powder on the change in pressure on it, by conducting a full factorial experiment. Thus, for the first time, new dependencies of the electrical resistance of iron powder on the compression force were obtained. This dependence shows that of the three factors under study, the greatest influence is exerted by the compression force, with an increase, the resistance decreases, a decrease in resistance is also observed with an increase in the bushing diameter, which models the diameter of the conductor cross-section. With this increase in the mass of the powder, the resistance increases, from which it can be concluded that with an increase in the length of the conductor, the electrical conductivity decreases.Conclusion. As a result of the experiments, it was found that the electrical iron powder changes its electrical resistance depending on the force applied to it, the diameter of the conductor and the mass of the compressed powder. Based on the results of the experiment, an empirical relationship was compiled between these factors.
Fire resistance of textile materials treated with flame retardant based on electroerosive Aluminum hydroxide powder
Authors: Ageeva A. E. , Ageeva E. V. 
Published: December 2024

The purpose of this work was to study the fire resistance of technical materials treated with flame retardants based on electroerosion powder of Aluminum hydroxide.Methods. Aluminum metal wastes of the AD0E brand were dispersed in distilled water at a loading weight of 250 g at an experimental installation. The resulting electroerosive aluminum powder was studied by various methods. The microanalysis was performed on a QUANTA 600 FEG microscope. The phase composition was studied using a Rigaku Ultima IV diffractometer. The fire resistance of the treated fabric was studied according to the following method: a strip of fabric 5 cm wide and 10 cm long was suspended in an upright position by one end in a tripod clamp (the other end remains hanging freely). The flame of an alcohol burner was placed under the lower end of the sample for 12 seconds (according to a stopwatch). After the specified time, the flame of the burner was removed and the burning and smoldering time of the sample was noted after the flame ceased to act. Gorenje After the end of the experiment, the area of the charred part of the sample was measured.Results. Experimental studies of the fire resistance of textile materials treated with flame retardants have shown high efficiency of using an electroerosive aluminum hydroxide powder for these purposes. Aluminum hydroxide powder was obtained in distilled water from electrical aluminum metal waste. The peculiarity of the use of the obtained aluminum hydroxide is due to the fact that it provides a difficult-to-ignite fabric, reduces the ability of the material to ignite, localizes the flame; provides a long-term flame retardant and at the same time antiseptic effect; treated fabrics are odorless, harmless to humans and animals; consumption for impregnating fabrics: 100-250 g/m2, depending on the density of the fabric.Conclusion. The effectiveness of flame retardants based on electroerosive Aluminum hydroxide powder is confirmed by the fact that cheap metal waste and progressive environmentally friendly (without wastewater and emissions), low- energy technology (up to 5 kWh/kg) are used for its production.