bluuebunny/crossref_metadata_2025_split huggingface dataset:
Determining the effect of treatment with antimicrobial substances before storage on the preservation of lemons
Authors: Pusik Ludmila , Pusik Vlаdimir , Bondarenko Veronika , Kyriukhina Natalja , Terokhina Liudmyla , Ketskalo Viktoriia , Kondratenko Serhii , Voitsekhivskyi Volodymyr 
Published: March 2024

The problem solved is to determine safer and more effective technologies for post-harvest processing of fruits. To achieve the goal, lemon fruits (of different degrees of wilting) were cut crosswise, each piece was treated with miramistin and deсasan in concentrations of 0.1 %, 0.3 %, and 0.5 %. The samples were placed on agar blocks with pure cultures of pathogens and placed in wet Petri dishes, kept at a temperature of 25 °C in a thermostat for 6–10 days; the experiment was repeated three times. The research aimed to establish the concentration of antimicrobial drugs for treating lemons; determine the weight loss of lemon fruits depending on the storage temperature. The object of the study is the process of preserving the quality of lemon fruits during post-harvest treatment with antiseptics during cold storage.
It is proposed to treat lemon fruits with miramistin and deсasan in concentrations of 0.3 % and 0.5 % in order to inhibit the development of blue and green mold during storage. Damage to turgor fruits is two times less than that of weakly wilted ones. At a storage temperature of 10 °C, fruits are stored for 40–45 days. At the same time, daily losses are 0.49 %. Lowering the storage temperature to 4 °C extends the storage period to 90–100 days, with a daily mass loss of 0.08 %. A curvilinear correlation dependence of the second order of weight loss of lemon fruits on the duration of storage was established (R2=0.9758–0.9903).
Treatment with antiseptics makes it possible to implement environmentally friendly solutions that will make it possible to exclude chemically synthesized fungicides and preserve the natural properties of fresh citrus fruits after harvesting, as well as extend their shelf life. In the development of new, low-cost, environmentally friendly, and affordable technologies, this is an important technique
Effect of variations in concrete quality on the crack width in rigid pavement
Authors: Wisnumurti Wisnumurti , Soehardjono Agoes , Simatupang Roland Martin 
Published: March 2024

Cracks pose a significant issue in rigid pavement, leading to substantial damage. The manual mixing and casting of road pavement concrete underscore the importance of concrete quality as a critical parameter. This study investigates crack behavior by varying concrete quality. Loading is performed statically using line loads, shedding light on the impact of concrete quality on crack development. The concrete to be used has a quality fc' of 15 MPa, 25 MPa, and 35 MPa. The fine aggregate used in this study was Lumajang black sand, while the coarse aggregate used was machine crushed stone, and Portland Composite Cement (PCC) was used in all concrete mixes. The reinforcing steel used had a quality fy of 480 MPa, with a reinforcement ratio of ρ=0.010, which was converted to 5-D16 reinforcement. The subgrade density used to support the specimens had a CBR value of 10 %. Specimen dimensions were 2×0.6×0.2 m for length, width, and thickness. Pavement plates, 30 cm thick, were placed on leveled subgrade soil in a steel box set to achieve a 6 % CBR reading. Hydraulic jacks, monitored by a load cell, applied monotonic static loading with 2 kN intervals, reaching a maximum load of 200 kN. Steel tension and plate settlement were measured using a tension sensor and Linear Variable Differential Transformer (LVDT), respectively. A data logger recorded readings, and crack widths were captured by a digital microscope with 0.01 mm accuracy. Experimental results show that low concrete compressive strength values result in larger crack widths, and vice versa. Cracks also occur at earlier loading of concrete quality fc' 15 MPa. In addition, experiments show that the reinforcement stress value has a significant influence on crack width in specimens with low concrete quality
Enhancing savonius rotor model with additional grooves on hydrokinetic turbine performance
Authors: Sampelawang Petrus , Salam Nasaruddin , Sule Luther , Tarakka Rustan 
Published: March 2024

Hydrokinetic turbines use different rotors for technological and economic reasons. Even though it performs poorly, vertical-axis hydrokinetic turbines use the Savonius rotor. The object of research is a Savonius rotor model with additional grooves. The study addresses the need to improve the efficiency and overall performance of Savonius rotor models in hydrokinetic turbines, which are widely used for harnessing energy from flowing water currents. The problem involves understanding how different groove configurations affect the aerodynamic behavior and energy extraction efficiency of the Savonius rotor in hydrokinetic turbine applications. The test results revealed that incorporating grooves led to notable improvements in efficiency (ɳ) and coefficient of drag (CD). Grooved blades exhibited a maximum efficiency of 30.97 % and a maximum drag coefficient of 2.71. Notably, blades with a groove width of 12.5 mm emerged as the optimal model, demonstrating an efficiency peak of 35.66 % and a drag coefficient 3.08. This indicates a substantial increase in efficiency by 4.69 % and a corresponding rise in the drag coefficient by 0.37 for grooved blades. The grooves on grooved blades increase friction, improving performance. Grooved rotor blades improve turbine performance significantly. Savonius rotor models in hydrokinetic turbines extract more energy by optimizing groove width and arrangement to maximize drag coefficient and efficiency. This research affects hydrokinetic turbine design and optimization for renewable energy generation. Engineers and designers can improve the performance and efficiency of the Savonius rotor model in hydrokinetic turbine applications by applying this study’s findings
Experimental study of water spreading parameters when extinguishing fires using aircraft sprinklers
Authors: Panchenko Serhii , Bychenko Artem , Nizhnyk Vadym 
Published: March 2024

This paper reports results of an experimental study on hydrodynamic processes when water is dropped from a height, as well as their influence on the movement of liquid, in order to optimize the processes of aviation firefighting.
The main parameters of water dispersion were determined based on a series of experiments. It was established that the average diameter of drops when dropped from a height of 10 meters is 2.5 mm, with a maximum spraying distance of up to 15 meters. The size distribution of the droplets showed that 30 % of the droplets have a diameter of less than 2 mm, 50 % are between 2 and 5 mm, and 20 % are more than 5 mm.
During the experiments, it was measured that the time for pouring water from the container is 3 seconds, and the speed of movement of water fractions when dropped from a height of 10 meters is 9.8 m/s. With an increase in the discharge height by 5 meters, the speed of water movement increased by 20 %.
One of the key points of the study is the improvement of the Torricelli equation by introducing the coefficient K (0.85), which takes into account the viscosity and density of water, which improved the accuracy of calculations by 15 % compared to the standard equation.
Python was used to process and interpret the video data, along with libraries such as OpenCV for image processing, NumPy for high-performance mathematical computations, and Matplotlib for data visualization. The resulting data open up new prospects for devising aerial firefighting strategies, providing a 20 % increase in coverage area, and a 25 % reduction in firefighting time.
Torricelli's equation was improved; a new procedure was devised for the experimental determination of water dispersion parameters, which has an important practical application in the field of fire safety.
In the field of fire safety, the data obtained could be used to improve aviation firefighting strategies, which would allow for greater efficiency and safety
Development of method for frequency regulation of output current in high-voltage transformerless resonant chargers of capacitive energy storage devices
Authors: Vinnychenko Dmytro , Nazarova Natalia , Vinnychenko Iryna 
Published: March 2024

The object of research is high-voltage systems of electric discharge installations for various technological purposes. The work reports solving the problem of enabling the rate of charging of a capacitive energy storage, set by the requirements of a certain high-voltage technology.
The quantitative characteristics of the deviation of the output current of the resonant inverter from the set stabilized value when changing the switching frequency of inverter switches in the range of output voltage change from 0 to 20 kV were determined. Using the Fourier transform of the rectangular input voltage, the frequency regulation possibility of the output current of the charger for capacitive energy storage devices was analyzed. Estimation dependences of the output current of resonant inverter on the load resistance and frequency deviation from resonant frequency were derived. These dependences could be used to implement frequency control over the switching inverter transistors, with the help of which the given effective value of the output current of the resonant inverter is obtained.
A method of frequency regulation of the output current in high-voltage transformerless resonant charging devices of capacitive energy storage devices has been developed. Special feature of this method is that it is based on the frequency dependence of reactive resistances of the inductance and capacitance of the resonant circuit connected in series. Owing to that, it makes it possible to adjust the switching frequency of the inverter’s power switches depending on the relative resistance of the load and the specified growth rate of the capacitive energy storage voltage.
The results reported here could be used in the design of benches for testing the electrical strength of high-voltage cables, as well as for the construction of high-voltage transformerless chargers in systems of electric discharge impulse processing of materials
Determining the thermally-stressed state of motor-driven bowls for transporting liquid slag
Authors: Povorotnii Viktor , Shcherbyna Iryna , Zdanevych Serhiі , Diachenko Nina , Kimstach Tetiana , Solonenko Lyudmila , Usenko Ruslan 
Published: March 2024

Slag bowls were chosen as the object of research, as important components of blast furnace, steelmaking, and ferroalloy shops of metallurgical enterprises. The main problem of operation of any slag trucks is their limited durability and frequent destruction of slag bowls. The reason for these problems is changes in the shape of the bowls during operation, manifested in the formation of narrowing places in the area of the support ring – for rail-mounted bowls, destruction of supporting pins – for rail-mounted slag trucks, or cracks in the walls. Those defects appear as a result of cyclic thermal effects of liquid slag on the bowl. Based on the results of computer simulation, it was established that the main role in the destruction of the support pins of motor-driven slag bowls belongs to temperature changes. The temperature stresses arising in the bowl are localized in the area of the slag mirror (200–250 MPa for 25L steel, 280–350 MPa for 30HML steel). The results provide grounds for improving the presented slag bowl to reduce temperature stresses in its walls and structures of the supporting trunnions. The results reported here are explained by the fact that with uneven heating of elastic bodies, temperature stresses appear, which, under certain configurations of temperature loads, lead to the destruction of structures. The findings from these studies are recommended to be used at enterprises for the design and manufacture of slag bowls, as information on the localization of dangerous places of the structure. In addition, the data presented here could be useful for metallurgical enterprises for detailed technical diagnosis of bowls in their dangerous places
Evaluación del estrés académico y sus efectos sobre el rendimiento en estudiantes universitarios
Authors: Lemos Rentería Moira Isabel , Zapata Rueda Carla María , Delgado Arroyo Lubin 
Published: March 2024

Objetivo: Construir un modelo de relacionamiento entre variables de estrés, afrontamiento académico y ansiedad con el rendimiento académico y el posible impacto de variables de control sociodemográficas en estudiantes universitarios de la Universidad Tecnológica del Chocó “Diego Luís Córdoba”.
Metodología: La investigación fue de naturaleza cuantitativa, de corte analítico-transversal, que mediante un modelo de estructura de covarianza se evalúa un modelo causal sobre la influencia del estrés en el rendimiento académico. La muestra se seleccionó mediante muestreo por conveniencia, estuvo conformada por 292 estudiantes (57% mujeres, 42.8% hombre), con edades entre 16 a 48 años, matriculados en programas de pregrado en la Universidad Tecnológica del Chocó Diego Luis Córdoba.
Resultados: Los resultados obtenidos demuestran que las variables de control, edad, semestre cursado y estrato tienen influencia en el rendimiento académico. En cuanto al neuroticismo y el Psicoticismo se afirma que influyen negativamente en el rendimiento académico de los estudiantes a un nivel de confianza del 99.9% y son negativos por su coeficiente negativo (-0,217).
Conclusiones: De acuerdo con los análisis realizados sobre la evaluación del estrés académico y sus efectos sobre el rendimiento en estudiantes universitarios, se evidencio que los estudiantes que dependen económicamente de sus padres presentan mejor rendimiento académico en comparación con los que subsisten con rentas propias. Por su parte, el análisis entre el sexo y el promedio académico, evidencio que estas variables se encuentran correlacionado, por ello las mujeres de este estudio presentan mejores promedios académicos que los hombres con unas desviaciones estándar (0.44, 0.46) mostrando poca dispersión de los datos entre los promedios.
ПРОРОЧЕСТВА Н. Ф. ФЕДОРОВА О ВОЙНЕ В ТРАКТОВКЕ Н. А. БЕРДЯЕВА
Authors: Малахаткин Евгений Олегович 
Published: March 2024

Цель статьи. В статье рассматривается анализ Н. А. Бердяева воззрений Н. Ф. Федорова о войне, которые он назвал пророческими, прежде всего, предсказания неизбежности именно мировой войны, в которой предвидел главную роль Германии.
Методология исследования базируется на традициях русской философской мысли.
Результаты. Делается вывод о том, что Н. А. Бердяев акцентирует внимание на том, что Н. Ф. Федоров хорошо понимает: Германия — носительница милитаристического индустриализма и «мировой пожар» возгорится по ее вине. Отмечается, что Н. А. Бердяев осмысляет воззрения Н. Ф. Федорова на войну, исходя из фундаментальных положений «философии общего дела» последнего. Это дает возможность увидеть такие принципиально важные вещи для федоровского понимания войны, как противопоставление «духа германизма» «духу расы славянской», использование армии для регуляции природных сил, прекращение войны как устранение розни через преодоление смерти и т. д. Рассматривается критическое отношение Н. Ф. Федорова к таким представителям немецкой философии, как Шопенгауэр, Кант, Ницше, которые явились идейным источником «духа германизма». На этом фоне выявляются типологические отличия немецкой «воли к власти» и русской «воли к правде». В заключении делается вывод, что анализ идей Н. Ф. Федорова, осуществленный Н. А. Бердяевым, имеет важно значение для понимания своеобразия философии войны в контексте фундаментальных идей русской философии.
Перспективы исследования заключаются в дальнейшем осмыслении феномена войны в русской философии.
АНАЛИЗ СВОБОДЫ ТВОРЧЕСТВА В КОНТЕКСТЕ СИНЕРГЕТИЧЕСКОЙ ТЕОРИИ
Authors: Шатохина Наталья Петровна 
Published: March 2024

Цель исследования заключается в рассмотрении феномена свободы творчества в контексте синергетического метода как междисциплинарного поля исследования, позволяющего осмыслить данное явление во всей его полноте и противоречиях.
Методологический конструкт. Исследование феномена свободы творчества базируется на синергетическом методе. Синергетическая парадигма позволяет рассмотреть его как бифуркационный механизм, запускающий процесс самоорганизации сложных когерентных систем, задействованных в процессе созидания.
Результаты исследования. Синергетический метод дает возможность наиболее полно отразить процесс созидания, а именно — ситуацию выбора дальнейшего сценария создания творческого продукта. Состояние вдохновения, вынашивания произведения всегда характеризуется нестабильностью, изменчивостью, хаотичностью, тогда как итог творчества гармоничен и целостен. Рассмотрение процесса творчества и феномена свободы творчества как единого, сложносформированного целого, осуществляющего самоорганизацию произвольного структурогенеза, дает возможность обнаруживать скрытые механизмы, задействованные в творческом акте, выводит науку и культуру на новый уровень.
Перспективы исследования определяются тем, что синергетическая парадигма лабильна и применима к анализу самых разных природных и социальных процессов. Синергетика позволяет рассматривать любое явление как комплекс самоорганизующихся систем, способных переходить от хаотичности к упорядоченности.
ИНСТИТУЦИОНАЛЬНО-ПРАВОВОЕ РЕГУЛИРОВАНИЕ ИМУЩЕСТВЕННЫХ ОТНОШЕНИЙ МЕЖДУ БЫВШИМИ СУПРУГАМИ В СОВРЕМЕННОМ РОССИЙСКОМ ОБЩЕСТВЕ
Authors: Реброва Наталья Михайловна 
Published: March 2024

Целью исследования является характеристика некоторых проблем правового регулирования имущественных отношений между супругами (бывшими супругами) и сложившихся в правоприменительной практике подходов к их разрешению, а также разработка предложений по совершенствованию законодательства в указанной сфере.
Методологическую базу составили методы науки семейного права, как общенаучные, так и специальные: анализа и синтеза, формально-логический. С их помощью выявлено содержание и дано толкование правовых норм, обобщены позиции Верховного Суда Российской Федерации по актуальным проблемам правоприменения, выраженные им при разрешении конкретных дел, сформулированы предложения по совершенствованию норм, регулирующих имущественные отношения между супругами (бывшими супругами).
Результаты исследования. Анализ правоприменительной практики свидетельствует о том, что существует насущная потребность в совершенствовании правового регулирования имущественных отношений между супругами (бывшими супругами). Однако следует признать, что такое совершенствование должно происходить эволюционно, а не путем революционного изменения правовых основ имущественных отношений между супругами (бывшими супругами). Прежде всего следует обратить внимание на проблемы, касающиеся раздела общего имущества супругов, и создать правовые условия для реализации супругами права изменить режим совместной собственности уже в момент приобретения имущества. Для этого следует законодательно закрепить право супругов включать в соответствующий договор положения о приобретении имущества в долевую или раздельную собственность и определить форму подобного договора. Поскольку режим совместной собственности как законный режим имущества супругов достаточно распространен, следует закрепить нормы, позволяющие сделать Единый государственный реестр недвижимости более достоверным: отражать в нем право общей совместной собственности супругов на объект во всех случаях, когда таковое возникает. Это позволит снять многие проблемы, связанные с заключением сделок с общим имуществом супругов (бывших супругов), защитить интересы как самих супругов (бывших супругов), так и добросовестных приобретателей.
Перспективы исследования предполагают дальнейший поиск путей совершенствования правового регулирования имущественных отношений между бывшими супругами с учетом меняющейся социально-экономической ситуации как с целью обеспечения интересов самих супругов (бывших супругов), так и с целью обеспечения стабильности гражданского оборота.
Minimasi Biaya Masalah Penjadwalan Awak Pesawat Menggunakan Teknik Penugasan
Authors: Wulan Elis Ratna , Mujtaba Aa , Mutia Rima 
Published: March 2024

In this paper, the problem of airline crew scheduling is studied. The main difficulties are divided into team missions and team mixes based on their sheer size, initial arrangement, and flexible rules and directions of airport locations. In this paper, we propose the problem in which flight schedules and crew schedules for aircraft are optimally fixed through data provision. Then, we construct a mathematical model by determining the transportation cost from all flight schedules for a given time period to not disturb crew members with available crews. The model is solved using the Hungarian method. From the present study undertaken, the optimum solution for the given cost between Bhubaneshwar and Kolkata flight routes was observed as 85 hours.Keywords: Flight Crew Scheduling, Hungarian Method, Minimum Cost. AbstrakPada makalah ini, dikaji permasalahan penjadwalan kru maskapai. Kendala utama dari masalah penjadwalan kru adalah pembagian tugas berkelompok, pencampuran tim berdasarkan ukurannya yang besar, dan penataan awalnya, serta peraturan dan pedoman fleksibel dari posisi bandara. Dalam makalah ini, diusulkan masalah di mana jadwal penerbangan dan jadwal kru pesawat difiksasi secara optimal dengan memberikan data. Kemudian, dibangun model matematika dengan membatasi biaya transportasi dari semua penjadwalan penerbangan dari periode waktu tertentu untuk tidak mengganggu anggota kru dengan kru yang tersedia. Model tersebut diselesaikan dengan metode Hungarian. Dari studi kasus yang diambil, solusi optimal dari biaya maskapai yang diberikan antara rute kru Bhubaneswar dan Kolkata tercatat sebesar 85 jam.
HAK RUANG ZONA EKONOMI EKSKLUSIF INDONESIA DI LAUT NATUNA UTARA DARI SUDUT PANDANG UNCLOS III (1973-1982) DALAM PENYELESAIAN TUMPANG TINDIH BATAS LAUT
Authors: Wisayantono Dwi , Djunarsjah Eka , Putra Briantara Revidinda 
Published: March 2024

The issue of the North Natuna Sea between Indonesia and China has become a crucial issue that has yet to find a bright spot to resolve disputes in the region. The claim of the nine dash line or nine dashes unilaterally by China has caused losses for Indonesia to the full sovereignty and integrity of the country which is included in the Exclusive Economic Zone in the North Natuna Sea. Although each country has ratified UNCLOS (United Nations Convention of the Law of the Sea) or ratified it as the International Law of the Sea, it means that every decision is based on the force of law that has been mutually agreed upon. China considers claims based on historical aspects (historical) at the time of their ancestors in the past. However, according to Law Number 5 of 1983 referring to UNCLOS, it is stated that the Indonesian Exclusive Economic Zone (ZEEI) is a path outside and bordering the Indonesian Territorial Sea as determined based on the applicable law concerning Indonesian Waters which includes the seabed, the land beneath it. , and the water above it with an outer limit of 200 nautical miles measured from the baseline so that the North Natuna Sea is or is included in the full rights of Indonesia. In this case, Indonesia has binding legal force to file a claim against or defense against China which claims arbitrarily and clearly violates the International Law of the Sea (UNCLOS). Through the writing of this paper, it aims to analyze and deliver input from the scientific aspects of geodesy and geomatics through an opinion on the resolution of the North Natuna Sea problem that Indonesia has strong evidence and is in accordance with the law so as to provide opportunities for resolving disputes in the region.Keywords: Exclusive Economic Zone,Dispute, North Natuna Sea, Nine Dash Line, UNCLOS