bluuebunny/crossref_metadata_2025_split huggingface dataset:
Identifying the influence of the concentration of surfactants on the technological indicators of aerosol emulsion
Authors: Putyatin Bogdan , Bliznjuk Olga , Masalitina Nataliia , Bezpal'ko Valentyna , Zhukova Liubov , Filenko Olesia , Horiainova Viktoriia , Ponomarova Maryna , Ryabev Anton , Beliuchenko Dmytro 
Published: December 2024

The object of the study is an emulsion system containing emulsifiers (Emulgin B2, Lanett SX), wetting agents (propylene glycol, glyceryl cocoate) and sodium laureth sulfate as a foaming agent. The main problem solved in the study is to ensure rational technological properties of emulsion systems in aerosol form under variable storage and use conditions. The results obtained showed that to ensure maximum emulsion stability during 7 and 30 days of storage, the optimal concentrations of Emulgin B2 are 2.75…3.0 %, and Lanett SX is 2.0…2.5 %. To achieve the desired foaming ability (80…85 %) and foam stability (75…80 %), it is recommended to use sodium laureth sulfate at a concentration of 0.20…0.22 %. It was found that the wetting agents – propylene glycol (7 %) and glyceryl cocoate (1.5 %) – provide optimal system viscosity within 35…40 mPa·s. The stability of the emulsion is ensured by the formation of strong interfacial films using Lanett SX, while Emulgin B2 improves the thermal stability of the system. Foaming properties are provided by the ability of sodium laureth sulfate to reduce interfacial tension, however, too high concentrations can lead to foam oversaturation and deterioration of its stability. The features of the obtained results are that specific concentration limits of the components are justified, at which the necessary stability and functionality of the emulsion system are ensured. This allows solving the problem of achieving optimal characteristics of the emulsion system during storage and use, ensuring comfortable application to the skin and a stable foam structure. The scope of application of the obtained results is the cosmetic industry
Identifying the influence of project delivery system (PDS) characteristics on green construction project performance
Authors: Mas Pertiwi I G A Istri , Zaika Yulvi , Puspa Negara Kartika , Solimun Solimun , Agung Wibowo Mochamad 
Published: December 2024

This study examines the influence of Project Delivery System (PDS) features on green construction project performance by comparing Design-Bid-Build (DBB), Design-Build (DB), and Construction Management (CM) methods. The research problem is to analyze the influence of key characteristics (leadership, communication, mindset, teamwork, team chemistry, experience, competence) of the three PDS methods on achieving green construction project performance. The research objects were 109 respondents (team leader, vice president manager, project manager, site manager, site engineer, general superintendent, and supervisor) in five major cities in Indonesia. The results of the MANOVA analysis showed that leadership was the most influential factor in the three methods. CM excels in time, quality, and green building performance, DB excels in Occupational Health and Safety (OHS), and DBB excels in cost. Experience and competence are less influential factors, thus concluding that soft skills play a significant role in the successful implementation of green construction projects, providing valuable insights for industry practitioners and emphasizing the need to prioritize the development of leadership and interpersonal skills alongside technical expertise when implementing green construction projects through various PDS methods in Indonesia, which ultimately contributes to the advancement of sustainable construction practices in the rapidly growing building sector in the region. These findings provide insights for selecting optimal PDS methods in green construction projects
Implementation of knowledge distillation in developing a prediction model to know the performance of air transportation vocational education using machine learning
Authors: Rumani Daniel D , Nasution Darmeli , Nugroho Okvi 
Published: December 2024

The object of this research is the performance of air transportation vocational education. The problem in this research that must be solved is the complexity of the model in machine learning which requires a long processing time and requires high resources, so the knowledge transfer process in knowledge distillation must be carried out carefully so that the student model can capture and reproduce knowledge from the teacher's model. without loss of accuracy and problems such as Good Corporate Governance, Organizational Flexibility, and Strategic Change Management variables, which are interrelated and difficult to model accurately. The results obtained are in the form of a model that can predict vocational education performance by utilizing machine learning and knowledge distillation. The interpretation of this research is to apply the XGBoost machine learning algorithm and knowledge distillation. The characteristics and characteristics obtained are that the teacher model has the best performance in terms of loss, while the student model with distillation shows a significant reduction in loss compared to training without distillation. Thus, the distillation process is proven to help student models capture knowledge from teacher models, producing prediction accuracy of up to 90 % and being an efficient alternative in predicting the influence of main factors on the performance of air transportation vocational education. These findings are expected to provide a significant contribution to the development of more efficient and effective prediction models in the context of vocational education, especially in the field of air transportation
Devising a technology for manufacturing hollow cast steel structures with composite and reinforced non-metallic functional filler
Authors: Shinsky Oleg , Kvasnytska Iuliia , Shalevska Inna , Kaliuzhnyi Pavlo , Neima Oleksandr 
Published: December 2024

The object of this study is the structure of hollow steel modules filled with various types of functional materials, as well as the technology of their production using lost foam casting.
Computer simulation of hydrodynamic and heat-mass exchange processes and solidification was carried out to establish the laws and prerequisites for designing state-of-the-art hollow cast structures and to devise their production technology. The study investigated the influence of reinforced steel elements and reinforcement directly from the liquid alloy of the shell on the peculiarities of hydrodynamic, heat-mass transfer processes, and solidification during the production of hollow steel structures with functional fillers.
It has been determined that the presence of polystyrene membranes in the functional filler for subsequent reinforcement from the liquid phase of the shell metal affects the hydrodynamics of filling the casting. In the thin channels formed in the filler, the metal flow rate increases from 2 m/s to 8 m/s in the upper channels, and from 3 m/s to 12 m/s in the lower channels, which is associated with an increase in metallostatic pressure.
The presence of metal reinforcement in the functional filler and the reinforcement of the functional material from the liquid phase of the shell metal accelerates the heating of the non-metallic filler by 1.2–1.4 and 1.4–1.8 times, respectively. Reinforcement also helps increase the maximum heating temperature of the functional filler by 200–300 °C, which creates better conditions for its sintering.
The grades of steels for their use as a matrix alloy in the production of hollow cast castings were determined; their structure and physical-mechanical properties were studied. The recommended modes of heat treatment of low-alloy steel to obtain the required properties have been determined.
The study reported here is a theoretical prerequisite for verification in the manufacture of experimental cast hollow structures with metallic and non-metallic reinforcing phase
Structural performance evaluation of mobile solar-powered battery swap station for electric motorcycles
Authors: Prasetya Sonki , Rahman Haolia , Todaro Muhammad , Tullah Muhammad Hidayat , Prasetyono Eka , Fadil Jazuli , Nugroho Mochamad Ari Bagus , Suprianto Teguh , Hayusman Lauhil Mahfudz , Zainuri Fuad 
Published: December 2024

This study introduces a structural design and static analysis of a Mobile Battery Swap Station for electric motorcycles, powered by solar energy, to address the critical need for sustainable and off-grid charging infrastructure. As the adoption of electric motorcycles continues to grow, driven by the demand for eco-friendly transportation alternatives, the lack of widespread and accessible charging infrastructure poses a significant barrier to their widespread use. In many regions, the expansion of traditional grid-connected charging stations is hindered by high installation costs, space limitations in urban environments, and logistical challenges in remote or underserved areas. The design focuses on a robust, mobile frame made from hollow iron of AISI 1010 steel, supporting the integration of photovoltaic (PV) panels to supply renewable energy directly to the battery-swapping system. Using Finite Element Analysis (FEA), the station’s structural integrity was evaluated under a uniformly distributed load of 700 kg, simulating real-world loading conditions for components essential to electric motorcycle operations, including PV mounts and battery racks. Results show a maximum displacement of 4.541 mm, a peak stress of 57.716 MPa, and a Factor of Safety (FOS) of 2.9, confirming the design’s ability to securely and stably support the necessary equipment for battery swapping. This mobile, solar-powered solution advances sustainable infrastructure for electric motorcycles, enabling flexible, grid-independent battery swapping that is particularly beneficial in urban areas and remote locations. This station contributes to greener mobility solutions tailored for electric motorcycles, aligning with broader efforts to support eco-friendly transportation systems
Identifying the effect of varying acid concentration and solid/liquid ratio in the leaching extraction of magnesium from ferronickel slag
Authors: Febriana Eni , Napitupulu Aldo Yansen Tambor , Soedarsono Johny Wahyuadi , Munir Badrul , Siradj Eddy Sumarno , Kaban Agus Paul Setiawan , Mertoprawiro Martina Yttria , Jaya Kadek Ambara 
Published: December 2024

Indonesia is the country with the largest nickel reserves and production levels in the world. Each ton of nickel production can produce eight tons of by-products in the form of ferronickel slag, which continues to increase due to the minimal recycling process of these by-products. This study aimed to determine the impact of changes in acid concentration and solid/liquid ratio on the leaching extraction of magnesium from ferronickel slag and characterize the transformation of ferronickel slag at each stage of the process. The research was conducted using the alkali fusion method and continued with water leaching and acid leaching using Hydrochloric Acid (HCl) as the solvent. The first step in the investigation was milling to get a powder with the particle size ≤127 µm. The sample powder was subsequently mixed with the Na2CO3 additive in a 50:50 (w/w) ratio and roasted for 60 minutes at 1000 °C. The water leaching procedure was then conducted for 60 minutes at 100 °C, a 1:10 (w/v) ratio, and a stirring speed of 400 rpm. The filtrate and residue were then separated using a filtration process. An acid leaching utilizing HCl with concentration variations of 0.5, 1, and 1.5 M, and solid/liquid ratio (s/l) variations of 1:20, 1:30, and 1:40 (w/v) was performed on the residue. The results of acid leaching were then filtrated again. The filtrate was then characterized by ICP-OES testing. Based on the analysis results, it can be stated that the percentage of magnesium extraction increases as the solid/liquid ratio (s/l) increases but decreases with the increase in HCl concentration. The optimum percentage of magnesium extraction is 64.12 %, which was achieved with the leaching conditions of a solid/liquid ratio (s/l) of 1:40 (w/v) and a HCl concentration of 0.5 M
Devising a deorbitation strategy for Kazakhstani’s KazEOSat-1 spacecraft
Authors: Zhumazhanov Berik , Kulakayeva Aigul , Ashurov Abdikul , Baktybekov Kazbek , Zhetpisbayeva Ainur , Uskenbaev Daniyar , Zhumazhanov Bexultan , Zylgara Aigerim , Kargulova Aliya 
Published: December 2024

The object of this study is the process of deorbiting the KazEOSat-1 spacecraft, which has completed its active service life in low Earth orbit. The main problem is the lack of an effective technique to deorbit KazEOSat-1, taking into account its technical characteristics, orbital parameters, and the need to minimize risks to the environment and other objects in orbit.
As part of the work, a software model was built that takes into account the initial orbital parameters of the device, which are essential for planning and performing deorbiting maneuvers. The model is designed to accurately calculate the descent trajectory, taking into account the laws of celestial mechanics and the influence of atmospheric conditions. The optimal deorbiting strategy was selected based on an analysis of various methods for calculating orbital maneuvers aimed at reducing fuel consumption and minimizing environmental risks. This included a comparative analysis of existing approaches and the selection of the most suitable ones under the given mission parameters.
The results of the simulation using precise modeling methods in the MATLAB software environment allowed us to determine the main deorbiting parameters, such as the altitude at which the maneuvers begin, the required velocity impulses, the total fuel consumption, and the expected time before entering the dense layers of the atmosphere. Based on the obtained data, practical recommendations were formulated for the KazEOSat-1 deorbit. The first stage, the active controlled deorbit, is carried out by operating the low-thrust engine and braking by the Earth’s atmosphere, allowing the spacecraft to descend from 758 km to 444 km in 2.5 days. The second stage, the passive uncontrolled deorbit, continues the descent to 103 km in 969 days, using only atmospheric braking. The third stage, the uncontrolled drop, begins after reaching 103 km and ends with a drop to the Earth in 834 seconds
Psychological and Philosophical Problems of Tolerance
Authors: Rubskyi V. M. 
Published: December 2024

Purpose. The purpose of the article is to formulate the uncontroversial principle of tolerance, taking into account the internal philosophical and psychological difficulties associated with its implementation in practice. Theoretical basis. The author proceeds from the insoluble problem of the very concept of "tolerance" and its psychological implementation. Not classical, but post-metaphysical psycho-religious method of promoting the idea of tolerance is proposed. This method was stated in the works by J. Derrida, P. Ricker, J. Caputo, G. Vattimo, R. Kearney, A. Shepherd, E. Newman, M. Moyaert, and others. The historical Christian type of tolerance (implementation of the principle of love for one’s neighbour) retains a significant potential for hidden aggression. This can be traced in the texts of the Holy Scripture and the fathers of the church. The division into friends and strangers based on the principle of confession remains relevant to this day. In addition, the religious component of tolerance tends to present it as self-worth, and not just an important socio-psychological parameter. The author points out that the application of Christian post-metaphysical approaches to this problem is the most philosophically coherent and psychologically effective. Originality. The article examines the internal semantic paradox of the idea of tolerance and methods of its promotion. The promotion of tolerance gives a rise to the suspicion of intolerance, which, being inherently intolerant, turns out to be a necessary component of the spread of the idea of tolerance. Typology of methods of introduction and promotion of tolerance (authoritarian, passive, psychological and religious), their main disadvantages and advantages are given. The main problems arising only at the level of philosophy and psychology are indicated. Conclusions. Historical Christianity is ineffective in achieving tolerance for a number of reasons: it is not sufficiently attentive to the individual, as it preserves the reasoning about the person in the categories of social formations (chosen people, etc.). The reality of God in classical texts was manifested by His violence in the past or in the future. The metaphysical basis of the principle of tolerance and the post-metaphysical understanding of hospitality return tolerance to its natural origin and provide a relevant basis for both interreligious dialogue and the removal of psychological tension between different cultural codes. The former models, which are proposed in the UNESCO Declaration, have a number of internal contradictions and are not effective enough in practice.
InSAR-Based Coseismic Deformation, Fault Slip Distribution, and Coulomb Stress Propagation of the 2023 Herat Earthquake Sequence
Authors: Liang Hongwei , Sun Guangtong , Zhang Guohong , Fan Xiaoran , Chen Han , Wang Jiaqing , Shan Xinjian 
Published: December 2024

Abstract
From 7 to 15 October 2023, four Mw 6.3 earthquakes occurred in northwestern Afghanistan. These earthquakes occurred on the northeastern edge of the Arabia–Eurasia collision zone, within the fault transition zone formed by the Doruneh and Herat fault systems; this area is primarily influenced by compressional stress from northeastern Iran. We used Interferometric Synthetic Aperture Radar to obtain the coseismic deformation of the earthquake sequence. Coseismic surface deformation in both ascending and descending tracks moved toward the satellite, consistent with the characteristics of a thrust fault rupture. Based on the coseismic deformation field and elastic half-space model, we inverted the fault-slip distribution of the earthquake sequence. The results indicate that the earthquakes occurred on a north-dipping, low-angle (27°) reverse fault. The rupture length of the earthquake sequence was approximately 55 km, with the rupture not reaching the surface. Rupture primarily occurred at depths of 5–15 km along the fault plane, with a maximum slip of ∼2 m; the slip direction primarily reflected the fault’s thrust motion. Using the fault kinematics model, we calculated the Coulomb stress changes on the fault plane for this earthquake sequence. The first two earthquakes caused stress loading on the fault planes of the subsequent two earthquakes, with stress reaching approximately 3 bar, indicating that the first two earthquakes had a stress-triggering effect on the latter two earthquakes. The deformation results show that the eastern segment of the fault bends toward the northeast owing to obstruction by mountains to the east.
Karakteristik Fisikokimia Selai Belimbing Wuluh – Nenas menggunakan Response Surface Methodology (RSM)
Authors: Rahmat Ramadhan Muhammad , Hartuti Sri , Agustina Raida 
Published: December 2024

Abstrak. Belimbing wuluh merupakan tanaman yang sangat banyak manfaatnya. Salah satu diversifikasi produk berbahan baku belimbing wuluh adalah selai. Selai belimbing-nanas dibuat melalui proses penghancuran buah belimbing serta nanas, penambahan gula dan pemasakan. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh jumlah nanas dan jumlah gula terhadap karakteristik sifat fisikokimia selai belimbing wuluh. Penelitian ini menggunakan metode Response Surface Methodology (RSM). Variabel yang digunakan yaitu jumlah nanas (X₁) dan jumlah gula (X₂), sehingga diperoleh 13 perlakuan. Analisis sifat fisikokimia selai belimbing wuluh yang diamati yaitu total padatan terlarut (TPT), vitamin C, kadar air, dan pengukuran daya oles. Hasil penelitian menunjukkan bahwa faktor perlakuan X1 dan X2, tidak memberikan pengaruh yang signifikan terhadap total padatan terlarut (TPT), vitamin C, kadar air, dan pengukuran daya oles. TPT tertinggi didapatkan pada perlakuan P4 (100 gr nanas dan 175 gr gula) yaitu 30,12⁰brix. Vitamin C tertinggi di peroleh pada perlakuan P8 (125 gr nanas dan 150 gr gula) sebesar 31,41 mg/100g. Kadar air terendah diperoleh pada perlakuan P3 (100 gr nanas dan 175 gr gula) sebesar 5%. Daya oles terbaik pada selai diperoleh pada perlakuan P2 (135,35 gr nanas dan 175 gr gula) sebesar 10 cm. Abstract. Averrhoa blimbi is a plant that has many benefits. One of the diversified products made from Averrhoa blimbi is jam. Jam is made through the process of crushing blimbi and pineapple, adding sugar and cooking. The purpose of this study was to determine the effect of the amount of pineapple and the amount of sugar on the characteristics of physicochemical properties of Averrhoa blimbi jam. This research used Response Surface Methodology (RSM). The variables used were the amount of pineapple (X₁) and the amount of sugar (X₂), resulting in 13 treatments. Analysis of physicochemical properties of Averrhoa blimbi jam observed were total soluble solids (TPT), vitamin C, moisture content, and spreadability measurement. The results showed that the treatment factors X1 and X2 did not have a significant effect on total soluble solids (TPT), vitamin C, water content, and spreadability measurements. The highest TPT was obtained in treatment P4 (100 gr pineapple and 175 gr sugar) which was 30.12⁰brix. The highest vitamin C was obtained in treatment P8 (125 g pineapple and 150 g sugar) at 31.41 mg/100g. The lowest water content was obtained in treatment P3 (100 g pineapple and 175 g sugar) at 5%. The best spreadability of jam was obtained in treatment P2 (135.35 g pineapple and 175 g sugar) by 10 cm.
Chemical and Sensory Characteristics of Chocolate Mousse with Variations in Chocolate Types and Stabilizers
Authors: Dewi Anastia , Zaidiyah Zaidiyah , Erika Cut 
Published: December 2024

Mousse merupakan jenis cold dessert atau makanan penutup dari Perancis yang dibuat dari krim kocok dengan aneka buah ataupun coklat, yang dikentalkan atau distabilkan dengan penambahan gelatin sebagai bahan penstabil (stabilizer). Penelitian ini bertujuan untuk mengetahui karakteristik kimia dan sensori mousse coklatt dengan variasi jenis coklat dan bahan penstabil. Penelitian ini menggunakan rancangan acak kelompok (RAK) dengan dua faktor, yaitu jenis coklat (M) terdiri dari dua taraf (M1=coklat batang; dan M2=coklat bubuk) dan tiga taraf jenis bahan penstabil (P) yaitu P1=CMC, P2=gelatin dan P3=pati jagung. Data hasil penelitian yang diperoleh selanjutnya dianalisis menggunakan analysis of variance (ANOVA), uji lanjut menggunakan uji Duncan Multiple Range Test (DMRT). Perlakuan jenis coklat dan jenis bahan penstabil berpengaruh nyata (P0,05) terhadap nilai hedonic warna dan aroma mousse coklat. Perlakuan jenis coklat berpengaruh nyata (P0,05) terhadap kadar air kadar lemak, warna, aroma, rasa dan tekstur mousse coklat, Perlakuan jenis bahan penstabil berpengaruh nyata (P0,05) terhadap kadar lemak dan hedonik warna dari mousse coklat. Hasil uji hedonic untuk tingkat kesukaan warna mousse coklat berkisar antara 3,0 (netral) dan 3,9 (suka) dengan rataan 3,6 (suka)tingkat kesukaan aroma adalah berkisar antara 3,3 dan 3,7 (suka) dengan rataan 3,6 (suka) rasa dinilai dengan skor berkisar antara 2,5 (netral) dan 4,1 (suka) dengan rataan 3,3 (suka), dan tekstur dinilai dengan rerata skor hedonic 3,4 (suka).