bluuebunny/crossref_metadata_2025 huggingface dataset:
ACOUSTIC CHARACTERISTICS OF ROCK SAMPLES UNDER NEGATIVE TEMPERATURES
Authors: ВОСТРИКОВ В.И. , ЦОЙ П.А. , УСОЛЬЦЕВА О.М.
Published: October 2024

Исследованы геофизические параметры образцов горных пород в водонасыщенном и замороженном состоянии, проведено их сравнение с образцами в естественном состоянии. При динамическом воздействии на образец регистрировался сигнал ускорения и рассчитывалась спектральная плотность, на основании которых определялись скорость продольных колебаний, логарифмический декремент затухания, коэффициент внутреннего трения, акустическая добротность. В водонасыщенных и замороженных образцах наблюдалось увеличение скорости распространения упругих продольных колебаний. Образцы, имеющие в замороженном состоянии высокие значения акустической добротности, разрушались при более значительных нагрузках. Степень водонасыщенности образцов влияла на их прочность: чем выше степень водонасыщения, тем меньше предел прочности образца. При замораживании образцов генерировались микросейсмические колебания в высокочастотной области сигнала. В экспериментах при одноосном сжатии на прессе до разрушения при критической нагрузке зарождения разрывной трещины фиксировался сигнал высокой частоты, по мере развития трещины спектр сигнала смещался в область низких частот.

The authors investigate geophysical parameters of water-saturated and frozen rock samples, and compare the results with the data of natural rocks. The samples were subjected to dynamic loading, an acceleration signal was recorded and a spectral density was calculated. On this basis, later on, the authors determined the longitudinal vibration velocity, the logarithmic decrement of damping, the internal friction factor and the acoustic Q-factor. The water-saturated and frozen rock samples demonstrated the increased velocities of longitudinal vibrations. The samples, which had the high acoustic Q-factors in the frozen conditions, fractured under much higher loads. The degree of water saturation affected the strength of the test samples: their strength reduced with the higher water saturation. Freezing of the samples generated microseismic vibrations in the region of high frequencies. In the uniaxial compression tests to failure of the samples under critical loading, a high frequency signal was recorded during initiation of an extension fracture, and the signal spectrum shifted toward lower frequencies as the fracture grew.
PHENOMENOLOGICAL MODEL FOR EVALUATION OF SLOPE STABILITY FOR OVERBURDEN ROCK DUMPS
Authors: КУЛИКОВ В.И. , ШАРАФИЕВ З.З.
Published: October 2024

Разработана феноменологическая модель инициирования оползня при многократном сейсмическом воздействии. Получены представления о закономерностях обрушения склонов под действием динамических нагрузок, результаты анализа большого объема натурных данных, инструментальные измерения сейсмического эффекта массовых взрывов, численные расчеты действия сейсмических колебаний на склоны. Сформулированы правила принятий решений при оценке возможности инициирования оползня сейсмическим воздействием. Проведена оценка устойчивости отвалов вскрышных пород карьеров Курской магнитной аномалии. Показано, что массовые взрывы в карьерах радикально не влияют на устойчивость отвалов вскрышных пород, однако нарушение работы дренажной системы, поднятие уровня грунтовых вод в отвалах может привести к накоплению необратимых деформаций.

The authors developed the phenomenological model of landslide initiation under multiple seismic effects. The model uses the lab-scale testing data on mechanisms of slope failure under dynamic impacts, the analysis of a large bulk of field data, the instrumental measurements of seismic effects induced by large-scale blasting and the numerical calculations of influence exerted by seismic vibrations on slopes. The rules are formulated for the decision-making in evaluation of potential landslide initiation under seismic impact. Evaluation of slope stability is performed for overburden rock dumps at open pit mines in the Kursk Magnetic Anomaly. It is shown that large-scale blasts in the test open pit mine have no effect on the stability of the dumps, but the damaged drainage and the rising of underground water can result in accumulation of irreversible deformations.
DESIGN OF HIGH SPEED ROTORS FOR AXIAL MINE FANS
Authors: КРАСЮК А.М. , РУССКИЙ Е.Ю. , ПАНОВА Н.В. , ИРГИБАЕВ Т.И.
Published: October 2024

Приведены результаты оптимального проектирования рабочих колес осевых вентиляторов главного проветривания шахт с использованием критериев: минимум массы и соблюдение требуемого уровня напряжения на узлах. Обоснована конструкция однодискового рабочего колеса. Для высокопроизводительных вентиляторов, имеющих окружную скорость по концам рабочих лопаток 200 - 220 м/с, решена задача топологической оптимизации по распределению материала в однодисковом рабочем колесе. Определены зависимости конструктивных параметров элементов рабочего колеса от частоты вращения ротора вентилятора. Топологическая оптимизация выполнена в программном комплексе ANSYS на основе метода SIMP.

The article presents the optimization design results for impellers of axial fans for main ventilation in mines using the criteria of minimum mass and required stress level in fan assemblies. The design of a single disk impeller is justified. For high-duty fans having the blade tip speed of 200-220 m/s, the topology optimization is performed for the single-disk impeller. The dependence between the design parameters of the impeller components and the speed of the fan rotor is determined. The topology optimization is implemented with SIMP in ANSYS.
INTENSIFICATION OF BASIC PROCESSES IN SEPARATION OF DIFFICULT DIAMOND-BEARING RAW MATERIALS
Authors: ЧАНТУРИЯ В.А. , ДВОЙЧЕНКОВА Г.П. , ЧАНТУРИЯ Е.Л. , ТИМОФЕЕВ А.С.
Published: October 2024

Представлены результаты теоретических и экспериментальных исследований возможности повышения качества конечных концентратов тяжелосредной, рентгенолюминесцентной, липкостной и пенной сепарации. Предложен метод азотирования поверхности ферросилициевых гранул в пределах значений глубины измененного слоя (30 - 60 нм) для снижения скорости коррозии ферросилиция в 2.7 раза при сохранении его технологических свойств. Показана необходимость применения в цикле первичной тяжелосредной двухстадиальной магнитной сепарации для снижения выхода черновых концентратов и повышения их качества за счет удаления сидерита на 29 - 95 %. Выбран оптимальный состав люминофорсодержащего реагента-модификатора, обеспечивающий практически полное извлечение в концентрат ранее не извлекаемых алмазов при выходе кимберлита не более 2.5 %. Стендовыми испытаниями в условиях переработки труднообогатимого алмазосодержащего сырья подтверждена возможность получения прироста алмазов в концентраты липкостной (14 %) и пенной (12.7 %) сепарации, а также в цикле доводочных операций рентгенолюминесцентной сепарации (25.3 %) за счет модифицирования свойств поверхности извлекаемых кристаллов физико-химическими и энергетическими методами.

The article describes the theoretical and experimental research data on possibility to improve the quality of the end concentrates of float-and-sink, X-ray luminescent, adhesive and froth separation. The method of nitride hardening is proposed for ferrosilicium grain surface with the hardened layer depth in the range of 30-60 nm for reducing ferrosilicium corrosion rate by 2.7 times at the preserved process properties. The necessity of adding the primary float-and-sink flotation circuit with two-stage magnetic separation to decrease the yield of rough concentrates and to improve their quality owing to removal of 29-95% of siderite. The optimized composition of luminophore-bearing modifying agent ensures complete recovery of earlier unrecoverable diamonds in concentrate at the maximum kimberlite yield of 2.5%. The workbench test processing of difficult diamond-bearing raw materials proves the possibility of incremental diamond concentration in adhesive and froth separation (by 14.0% and 12.7%, respectively), and in the cycle of finishing operations in X-ray luminescent separation (by 25.3%) owing to modification of surface properties of diamond crystals using physicochemical methods and energy deposition.
PROCESSIBILITY OF FINE-GRAINED MAGNETITE-APATITE ORE MILL TAILINGS AT KOVDOR DEPOSIT
Authors: МИТРОФАНОВА Г.В. , ПОСПЕЛОВА Ю.П. , СЕДИНИН Д.Ф.
Published: October 2024

Представлены результаты лабораторных исследований обогатимости тонкозернистых лежалых хвостов Ковдорского ГОКа. Исследованы действия реагентов-собирателей жирных кислот таллового масла (ЖКТМ). Методом беспенной флотации показана высокая селективность реагента Berol-2015 по отношению к апатиту. По результатам лабораторных флотационных испытаний установлено, что при использовании собирателя ЖКТМ содержание P2O5 в концентрате не превышает 24.4 %, несмотря на высокую степень обесшламливания питания флотации (~ 70.0 %). При работе с собирателем Berol-2015 получен концентрат с содержанием 35.0 - 37.7 % P2O5 без предварительного обесшламливания.

The article presents the laboratory-scale studies on processibility of fine-grained old tailings at Kovdor GOK. Effect of collecting agents represented by fat tall oil acids (FTOA) is investigated. The froth flotation tests show high selectivity of agent Berol-2015 relative to apatite. From the lab-scale tests, it is found that with collector FTOA, the P2o5 content of concentrate is not higher than 24.4% despite a high degree of desliming of flotation feed (~ 70.0%). With collector Berol-2015, the concentrate content of P2O5 reaches 35.0-37.7% without preliminary desliming.
APPLICABILITY OF THE SUSPENSION EFFECT IN ESTIMATION OF INFLUENCE EXERTED BY IONIC COMPOSITION OF FLOTATION PULP ON APATITE SURFACE
Authors: АРТЕМЬЕВ А.В. , МИТРОФАНОВА Г.В.
Published: October 2024

Определением суспензионного эффекта изучено изменение поверхностных свойств апатита под действием реагентов и ионов, присутствующих во флотационной пульпе в процессе переработки апатитсодержащих руд. Показано изменение соотношения кислотно-основных центров на поверхности апатита при взаимодействии с ионами HCO3-, CO32-, HPO42-, катионами Ca2+ и олеат-ионами в дистиллированной воде и в воде деионизированной от углекислого газа. Изменение свойств поверхности апатита в щелочной среде выражается в количественном преобладании на ней основных центров. Такая схема ионизации поверхности минерала обеспечивает благоприятные условия для сорбции катионов, например Ca2+, и создает предпосылки для более эффективного взаимодействия реагентов анионного типа. Полученные с помощью изучения суспензионного эффекта данные коррелируют с результатами ИК-спектроскопии апатита, обработанного соответствующими реагентами.

By means of determining the suspension effect, the authors studied the change in the surface properties of apatite under the action of reagents and ions present in flotation pulp during processing of apatite-bearing ore. It is shown that the ratio of acid-base centers of apatite surface change in interaction with ions HCO3-, CO32-, HPO42-, and oleate ions in distilled water and in water after deionization to remove carbon dioxide. The change in apatite surface properties in alkaline water shows up as quantitative superiority of base centers. Such ionization of mineral surface favors adsorption of cations, for example, Ca2+, and sets background for more efficient interaction between anion-type agents. The data obtained from the studies of the suspension effect, correlate with the results of infrared spectroscopy of apatite treated by the appropriate agents.
SINGLE-CRITERION OPTIMIZATION OF LIMESTONE SUPPLY UNDER THE CONDITIONS OF VARIABLE THERMAL POWER COMPLEX STRUCTURE AND THE DIFFERENCES BETWEEN SOLUTIONS
Authors: ПРАШТАЛО Ж. , ВУЙИЧ С. , КУЗМАНОВИЧ М. , СТЕПАНОВИЧ П. , ШАРАЦ Р.
Published: October 2024

Представлено однокритериальное моделирование поставок известняка в условиях изменяющейся структуры теплоэнергетического комплекса Сербии. Проанализированы различия между многоатрибутным и однокритериальным решениями.

The paper presents the single-criterion modeling of limestone supply under the conditions of the variable structure of the thermal power complex of Serbia. In the end, the paper provides an analysis of the differences between multi-attribute and single-criterion solutions.
IMPROVEMENT OF LOCAL ROCKBURST CONTROL EQUIPMENT IN MINERAL MINING
Authors: РАССКАЗОВ И.Ю. , АНИКИН П.А. , ГРУНИН А.П. , МИГУНОВ Д.С. , ТЕРЕШКИН А.А.
Published: October 2024

В результате модернизации аппаратной части прибора “Prognoz-L” на основе современной электронной базы и накопленного опыта разработан прибор “Prognoz-L2” для экспресс-оценки состояния массива горных пород. Приведены результаты апробации прибора в условиях месторождения опасного по горным ударам.

As a result of hardware updating of Prognoz-L based on the modern electronic engineering and the accumulated experience, rock mass express-evaluator Prognoz-L.2 has been designed. The test data of the evaluator are presented as a case-study of a rockburst-hazardous mineral deposit.
Effectiveness of Short-Term Use Denosumab and Risedronate Using β-Crosslaps and Histopathology as a Parameter in Osteoporotic Rat Model
Authors: Siwendro Afrisya Bimo , Ramdan Ahmad , Ismiarto Yoyos Dias , Yantisetiasti Anglita , Fachri Dliyauddin
Published: October 2024

Osteoporosis is a condition of decreased bone mass density. Pharmacological management uses drugs that decrease bone resorption or increase bone formation. The most commonly used drugs are bisphosphonates. Risedronate is one of these bisphosphonates. It inhibits osteoclasts, resulting in osteoclast apoptosis. Denosumab is a human monoclonal antibody that inhibits receptor activator kappa-B ligand, inhibiting osteoclast activation. Both drugs are widely used. Research on the efficacy of these two mechanisms has yet to obtain conclusive results. β-cross-laps is a parameter that can be used to evaluate the effectiveness of therapy through monitoring the bone resorption process. This experimental study used female rats >9 weeks old and was conducted at the Pharmacology and Therapeutic Laboratory, Universitas Padjadjaran Bandung, Indonesia, from  June to September 2021. This study utilized a simple random sampling to allocate 24 experimental animals into three groups: control, risedronate, and denosumab. β-Crosslaps expression values before ovariectomy, post ovariectomy before receiving medication, and post ovariectomy and receiving medication was recorded and statistically analyzed using the SPSS version 24.0. The analysis of 24 samples revealed a statistically significant decrease in the median value of β-Crosslaps after ovariectomy in the denosumab group (p=0.036) when compared to the control group, whereas the decrease in the risedronate group was not significant (p=0.687). Administration of denosumab in rat models is more effective in reducing bone resorption compared to risedronate.
Management of Stage-4 HIV with Cerebral Toxoplasmosis Coinfection and SIADH Complication
Authors: Laksono Pandu , Oktavia Erlin , Putri Hidayati Adi , Herawati Fauna
Published: October 2024

HIV/AIDS stage 4 is the stage where the HIV/AIDS patients have low immunity protection against infections, which can led to coinfections and complications. This case report presented an evaluation of the diagnosis and treatment of an HIV/AIDS stage 4 patient with cerebral toxoplasmosis coinfection and SIADH complications. A man (47 years, 35 kg), married with two children, complaining of weakness, nausea, vomiting, weight loss, and low appetite. Sodium level were measured, showing a 117 mg/dL level that continued to decrease throughout the patient's treatment. Five days later, the patient lost his consciousness with a GCS score of 224, indicating severe brain injury, and was diagnosed with cerebral toxoplasmosis based on the result of head CT-SCAN with contrast. On day 6, the patient was tested positive for HIV and diagnosed with stage 4 with an absolute CD4 count of 4 cells/μl. Therapy was provided by giving pyrimethamine-clindamycin therapy for cerebral toxoplasmosis, followed by Tenofovir, Lamivudine, and Evafirenz as antiretroviral therapy. Treatment for hyponatremia was done by administration of 3% NaCl and tolvaptan. The patient started experiencing an improvement in consciousness after the 10th day of medication, and sodium levels fluctuated throughout the treatments. Patient was discharged after 15 days with clinical improvements.
Microbial Diversity and Antimicrobial Susceptibility from Wound Dehiscence Isolates in an Indonesian Tertiary Referral Hospital
Authors: Aviana Felicia , Fatmawati Ni Nengah Dwi
Published: October 2024

Healthcare-associated infections (HAIs) remain a critical issue for public health in Indonesia, with wound dehiscence associated with surgical site infections (SSIs) being one of them. Globally, SSIs are known as the most common postoperative complications with a heightened prevalence, particularly in low to middle-income countries. With its retrospective and descriptive design, this study aimed to illustrate the microbial patterns identified in Prof. Dr. I.G.N.G. Ngoerah General Hospital from 12 January 2020 to 12 December 2022. The study includes all patients who underwent surgery and were subsequently diagnosed with wound dehiscence and SSIs. Specimens were collected from patients and submitted to the Microbiology Laboratory at the hospital above. Bacterial identification and susceptibility testing to antimicrobials were performed using the Vitek 2 Compact System (bioMerieux, Marcy l'Etoile, France). Patient information was sourced from medical records. Out of 172 samples, 151 (87.8%) yielded positive cultures. Among these, 151 (87.8%) were found to be positive. Gram-negative bacteria were found to be most prevalent, with Escherichia coli (20.2%) and Pseudomonas aeruginosa (19.6%) being the most frequently isolated bacteria. The bacteria isolated were mostly susceptible to amikacin (72.1%), followed closely by meropenem (71.4%). This information could contribute to the development of an empirical antibiotic therapy protocol for wound dehiscence or SSI cases in this local context.
Wzrost, inflacja, bezrobocie – współzależności na przykładzie wybranych krajów
Authors: Lechwar Małgorzata , Pyrek Radosław
Published: October 2024

W artykule podjęto próbę odpowiedzi na pytanie, jak w występującej złożoności zewnętrznych bodźców, zjawisk, czy procesów, mających wpływ na gospodarki, przedstawia się ich sytuacja gospodarcza, uwzględniająca stan i wzajemne współzależności podstawowych agregatów makroekonomicznych.
Celem głównym badań była diagnoza kierunków oraz współzależności między podstawowymi agregatami makroekonomicznymi wybranych gospodarek, tj. Szwajcarii, Wielkiej Brytanii, Rumunii w latach 2012–2022. Dokonano teoretycznej, analitycznej i empirycznej weryfikacji współzależności wybranych agregatów makroekonomicznych. Przyjęto założenie, iż występujące w literaturze przedmiotu mocno zróżnicowane poglądy na temat kondycji gospodarczej świata są wypadkową indywidualnej sytuacji makroekonomicznej gospodarek i że badane gospodarki nie muszą reprezentować radykalnych i skrajnych poglądów. Do rozwiązania postawionego problemu badawczego i weryfikacji hipotezy badawczej wykorzystano wybrane procedury wyjaśniania naukowego i badań, tj. analiza i ocena przedmiotu badań, analiza i synteza systemowa, uogólnianie wyników badań – i na tej podstawie podano wnioskowanie. Zastosowana analiza makroekonomiczna to badanie obejmujące stan gospodarki oraz przewidywań dotyczących wzrostu gospodarczego, inflacji, bezrobocia i wzajemnych współzależności występujących wewnątrz krajów pomiędzy tymi agregatami. Obejmuje badanie i ocenę wielkości ekonomicznych zagregowanych, a więc ujmowanych głównie dla całej gospodarki narodowej. Analizując przykłady Szwajcarii, Wielkiej Brytanii i Rumunii, można zauważyć, że stabilne i zrównoważone wzrosty gospodarcze sprzyjają niskiej inflacji i niskiej stopie bezrobocia. Niemniej, każdy kraj ma swoje unikalne wyzwania i warunki, które wpływają na wzajemne relacje między tymi wskaźnikami makroekonomicznymi. Zrozumienie tych wzajemnych zależności jest kluczowe dla opracowania skutecznych polityk gospodarczych, które promują zrównoważony wzrost, kontrolują inflację i utrzymują niskie stopy bezrobocia.
Analyzing Passive Design Retrofits using Pareto Front Optimization to Reduce Operational Carbon in Commercial Laboratory Spaces
Authors:   Architecture Department, National Institute of Technology, Tiruchirappalli, India, Vishwanath Lahari , Kannamma D ,   Architecture Department, National Institute of Technology, Tiruchirappalli, India
Published: October 2024

Buildings are one of the leading sources of carbon emissions in the world. Most of the carbon emissions are released during the operation phase of the building. It is essential for buildings to provide thermal and visual comfort for the users. In the case of existing buildings, it is necessary to offer retrofit solutions so that the operational carbon emissions can be reduced without compromising on the other essential factors. In this study a Multi-Objective Optimization (MOO) of passive design strategies was conducted for a commercial laboratory in India situated in a moderate climate zone. The design variables considered for the study are wall and roof insulation, glazing material, window-wall ratio (WWR), depth of shading device and the number of shading devices used. The objective functions are: 1. reduced energy use intensity and operational carbon emissions, 2. increased thermal comfort hours and 3. increased daylight autonomy. Rhinoceros and grasshopper software along with Ladybug and Honeybee plug-ins were used for the study which resulted in 1296 iterations. MOO technique namely Pareto front optimization was used to optimize the objective functions. Out of 1296 solutions (excluding base case), 72 solutions were non-dominated. Two methods are described in the study to identify the recommendations for retrofit. The first method describes a Heuristic method of selection using Design Explorer recommending 5 good solutions. In the second method a factor is evolved to identify the 5 best solutions in sequential order. The overall study recommends the use of EPS insulation for the RCC roof, WWR of 20% on all sides, 3 horizontal shading devices of depth 0.75 m for all window openings. When compared with the base case scenario, this solution minimizes the EUI by 3.7%, maximizes average TCH by 106.6% and maximizes average DA by 66.9%. The overall operational carbon emissions are reduced by 7095.6 kgCO2.
Violation of the Balance of Interests of the Parties as an Objective Necessity of the Procedure for Declaring Bankruptcy
Authors: Osmanova Diana
Published: October 2024

Introduction: currently, the idea of the need to achieve and maintain the balance of interests of the parties within the bankruptcy procedure is actively postulated in judicial practice. However, the author questions the correctness of the approach chosen by law enforcement officers, especially given the lack of the regulatory prerequisites for this. The analysis of the special law makes it possible to identify multiple cases of inequality of the parties to the relevant legal relations, with an unconditional justification of the political and legal reasons for the existence of such differentiated approaches. However, from the perspective of creditors and other interested parties, such regulation is only a manifestation of inequality, which is objectively inevitable, taking into account the specifics of the analyzed institution. Methods: the study was conducted using logical, dialectical techniques and methods of scientific cognition, as well as the legal and legal-grammatical analysis of the texts of normative acts and materials of law enforcement practice. As a result of the study, the position on the objective impossibility of the existence of the balance of interests of the parties to the procedure for declaring bankruptcy, taking into account the plurality of persons involved in the procedure, the scale of the conflict existing between the parties and being the basis of the bankruptcy procedure, as well as other circumstances that determine the need to differentiate the status of the involved persons, is substantiated. As examples of such inequality, the author describes different subjects – the categories of debtors (the bankruptcy of citizens, credit organizations, etc.); the categories of creditors (registered and current, separate queues within the register of claims, the special status of the authorized body, etc.), as well as other provisions of the law that strengthen the “gap” in the legal status of different parties. Based on the results of the conducted research, the author proposes to confirm the idea of the impossibility of achieving the balance of interests of the parties within the bankruptcy procedure and to establish the most important categories of obligations (or parties) that must be satisfied primarily within the procedure for declaring bankruptcy.
Daily reference evapotranspiration prediction using empirical and data-driven approaches: A case study of Adana plain
Authors: Koç Deniz Levent , Topaloğlu Paksoy Semin
Published: October 2024

Precise determination of the reference evapotranspiration (ET0) is vital to studying the hydrological cycle. In addition, it plays a significant role in properly managing and allocating water resources in agriculture. The objective of this research was to examine the effectiveness of five different data-driven techniques, including artificial neural networks "multilayer perceptron" (ANN), gene expression programming (GEP), random forest (RF), support vector machine "radial basis function" (SVM), and multiple linear regression (MLR) to model the daily ET0. These methods were also compared with Hargreaves-Samani (HS), Oudin, Ritchie, Makkink (MAK), and Jensen Haise (JH) empirical models and their calibrated versions. The empirical models JH and MAK performed better than the models HS and Oudin after being calibrated by linear regression. All data-driven methods with four inputs were superior to the original and calibrated empirical models. Generally, data-driven models provided increased accuracy and enhanced generalization in predicting daily reference evapotranspiration compared to empirical models. The RF and ANN methods generally demonstrated better estimation accuracy than other data-driven methods. The performance of the RF and ANN models that utilized Tmax, Tmin, and Rs inputs, as well as those that incorporated Tmax, Tmin, Rs, and U2 inputs, proved to be superior to their corresponding MLR-based and GEP-based models for predicting ET0 in the Adana plain, which is characterized by a Mediterranean climate. Nevertheless, the GEP and MLR methods have the advantage of utilizing explicit algebraic equations, making them more convenient to apply, especially in the context of agricultural irrigation practices.
Evaluating the role of insect pollinators in the viability of true seeds of shallot in tropical agroecosystems
Authors: Endarto Otto , Sunarto Dwi Adi , Nurindah Nurindah , Raharjo Bambang Tri , Tarno Hagus , Afandhi Aminudin , Sujak Sujak , Wuryantini Susi , Ubaidillah Rosichon
Published: October 2024

Pollen transfer in tropical agroecosystems to increase seed production has received limited research, notably on shallot pollination and insect pollinators. This study evaluated how insect pollinators optimize shallot seed production in tropical agroecosystems, i.e. Batu and Malang Districts in Indonesia. This study was conducted from June to October in 2023. We examined pollinator diversity, foraging behavior, and the effectiveness of dominating insect pollinators during umbel flower anthesis, as well as visiting insect foraging and visiting patterns. We assessed pollinator effectiveness by comparing visitation rates under four treatments. A total of 21 insect species belonging to three orders visited the shallot flowers, of which 14 species have the potential to act as pollinators. Apis cerana Fabricius, 1793 (Hymenoptera: Apidae) and Lucilia sericata (Meigen, 1826) (Diptera: Calliphoridae) emerged as potentially effective pollinators. Air temperature significantly influenced pollinator activity in visiting anthesis umbels. Evaluations of pollinator efficiency showed that A. cerana was more efficient than L. sericata in promoting the production of true shallot seed and has a significant role in ensuring high-quality pollination. This highlights the necessity of comprehending the specialized contributions of pollinators for shallot seed production.
Ecologies of Embodiment: Video Essays III
Authors: Hudson Polly , Dupas Ana Luiza Azevedo , Spahn Lea Maria Elisabeth , Magdonova Hana
Published: October 2024

Polly Hudson, “These Hands: an EcoSomatic approach to a woman’s labour - of the body, and on the land” (6:31). This video essay is part of an ongoing practice as a gardener and dancer, a long-term project at an inner city urban allotment, entitled And So we Sow. The work responds to notions of women's labour from an EcoSomatic and eco-feminist perspective, drawing on principles from releasing dance practices particularly Skinner Releasing Technique, from permaculture, and from wider embodied engagement. // Ana Luiza Azevedo Dupas, “Practice of Resting, Reading and Translating the Text: ‘Hapticality, or Love’” (9:52). This video shows fragments of the workshop: “Practice of resting, reading and translating the text: ‘Hapticality or love’,” held online in the context of IV EIRPAC event in September 2021. From the practice of Eutony, participants of the workshop are invited to a somatic reading, and “transcreation” of the text, which is an excerpt from Fred Moten and Stefano Harney’s The Undercommons: Fugitive Planning & Black Study. // Lea Spahn and Hana Magdonova, “‘Within the Memories of a Mountain’: Posthuman Embodying as Techno-material Becoming” (11:00). This video essay is based on footage from performance artist Hana Magdoňová during her 39-day stay in Hády – a renaturating quarry in the post-socialist Czech Republic. Through an immersive layering of (video)images, sounds, and spoken words, the essay depics embodied encounters with this space and reads them through feminist materialist and posthumanist thinkers highlighting the entanglement of bodies, technologies, things, and other beings on a planetary scale.
A priori estimates for derivative solutions of one-dimensional inhomogeneous wave equations with an integral load in the main part
Authors:   Kabardino-Balkarian State University, Boziev Oleg L. ,   Institute of Computer Science and Problems of Regional Management of Kabardino-Balkarian Science Center of the Russian Academy of Sciences
Published: October 2024

In this paper, the second initial-boundary value problem with homogeneous boundary conditions for a one-dimensional modified wave equation is considered. The modification consists in replacing the coefficient at the second spatial derivative with an integral load. In our case, it is a power function of the integral of the squared modulus of the derivative of the equation solution with respect to the spatial variable. Equations with such a load are associated with some practically important hyperbolic equations with a power nonlinearity in the main part. This makes it possible to use previously found solutions of loaded problems to start the process of successive approximation to solutions of nonlinear problems reduced to them. In this case, with respect to the original nonlinear equation, the loaded equation contains a weakened nonlinearity. Linearization of the loaded equation makes it possible to find its approximate solution. The article considers three cases of the integral load. It is the squared norm of the derivative of the solution with respect to x in the space L2 in natural, inverse to natural, and two integer negative powers. The corresponding a priori inequalities are established. Their right-hand side is used to pass to linearized equations. Examples of linearization by this method of wave equations with an integral load in the main part are given.
Mechanical behavior of titanium alloys in a dynamic punch test
Authors:   Tomsk State University, Skripnyak Vladimir V. , Skripnyak Vladimir A. ,   Tomsk State University
Published: October 2024

In this paper, the deformation and fracture of Ti–5Al–2.5Sn alloy in complex stress states under biaxial tension at strain rates of up to several hundred per second are studied. Such loading conditions are provided during high-speed punch tests for thin plates. Samples of titanium alloy plates are punched with a hemispherical indenter, which is 20 mm in diameter, at velocities of 10, 5.0, 1.0, and 0.5 m/s with simultaneous recording of the punching forces and maximum deflection and video recording of the sample surface at a speed of 13.000 frames/s. Numerical simulation of punching tests is performed at punching velocities ranging from 0.5 to 10 m/s to validate the constitutive relationships and damage development kinetics. To describe the plastic flow and fracture of Ti– 5Al–2.5Sn alloy in the range of strain rates from 0.001 to 1000 s-1 , the micromechanical damage model coupled with a model of the viscoplastic mechanical behavior of the material is used. The simulated crack shape and deflections are found to be similar to those obtained experimentally. Thus, dynamic bursting testing allows the validation of models of damage kinetics in complex stress states.
Effective mechanical parameters of bone tissue samples for the selection of individual osteoimplants
Authors:   Tomsk State University, Chaykovskaya Tat’yana V.
Published: October 2024

The results of the stress-strain state of model bone meso-volumes containing cancellous and cortical bone tissue together and micro-volumes of cortical and cancellous bone tissue separately under uniaxial compression are presented. Unconventional effective mechanical parameters, serving as a relative measure of the deformation response manifestation for the considered meso- or micro-volume of bone in three perpendicular directions, and the effective modulus of elasticity under axial compression are determined. It has been revealed that the micro- and meso-volumes of bone tissue with different structures and compositions may differ in the pattern of stress and strain distribution, but have similar elastic moduli, and vice versa. It has been shown that the micro- and meso volumes of bone tissue samples with different structures and compositions, having the same distribution of stresses and strains, are characterized by the same values of the introduced effective mechanical parameters. It is proposed to use effective mechanical characteristics and longitudinal modulus of elasticity during the selection and development of individual osteoimplants. When installing an implant into the bone, it is suggested to coordinate the orthotropic axes of the implant and the replaced bone site to maintain a favorable mechanical state of the bone consistent with that before implant installation.
Pseudo-Riemannian metrics on a variety of applied covectors
Authors:   Tomsk State University, Bukhtyak Mikhail S.
Published: October 2024

Based on the three-dimensional affine space A3, a six-dimensional point-vector space E6 is constructed, where its point is an ordered pair consisting of a point from A3 and a covector, and its vector is an ordered pair consisting of a vector and a covector. There is a pseudo-Euclidean metrics of signature in E6 (3,3). The problem of finding all affine semi-invariant pseudoRiemannian metrics in the tangent fibration of a given space is solved. It is shown that finding semi-invariant metrics leads to finding invariant metrics, and there is a one-parameter family of such metrics (including the pseudo-Euclidean metrics as the trivial case). For the given family of metrics, the Levi-Civita connection is constructed, and a description of geodesic lines of this connection in the general case is given.
Damping of out-of-plane oscillations of a spherical object during contactless transportation by an ion beam
Authors:   Samara National Research University, Ledkov Aleksandr S. , Belov Aleksey A. ,   Samara National Research University
Published: October 2024

This paper is devoted to the problem of space debris removal from near-Earth orbits. The ion–beam shepherd concept is used as the basis for this study. A spherical space debris object is transported by an ion beam generated by an active spacecraft engine. The relative motion of space debris with respect to an active spacecraft is studied. The active spacecraft is supposed to be a material point moving in a circular orbit. The center of mass of space debris can oscillate with respect to the orbit plane during transportation. The purpose of this study is to derive the optimal control law for the thrust force of an active spacecraft engine that provides the fastest damping of out-of-plane oscillations. The Bellman equation is used to develop the optimal control law. The numerical simulation of space debris deorbiting reveals the accuracy of the proposed control law. It is shown that periodic engine shutdown does not significantly increase the deorbiting time.
Principles for implementing servo-constraints in nonholonomic mechanical systems
Authors:   I.N. Ulianov Chuvash State University, Mikishanina Evgeniya A.
Published: October 2024

The problem of implementing servo-constraints in nonholonomic mechanical systems is considered. An attempt is made to outline the theoretical principles for composing equations of motion of nonholonomic mechanical systems with servo-constraints, to set the conditions for implementing servo-constraints, and to indicate the features of the introduction of control forces implementing the motion program from the point of view of their practical realization. In contrast to nonholonomic constraints, the method of implementation is important for servo-constraints. To illustrate the principles outlined in this study, a mathematical algorithm for controlling a wheeled two-link robot (driving trolley and trailer) with a differential drive is constructed using servo-constraints. Nonholonomic constraints are also imposed on the wheels of the system. On the basis of the joint solution of the equations of motion in quasi-velocities and time derivatives of nonholonomic and servo-constraints, the equations of motion of the wheeled robot are obtained. The dynamics of the wheeled robot is studied when a motion program is set that allows pursuing a target. The dynamics of the wheeled robot is studied when a motion program is set that controls the angle of deviation of the trailer from the driving trolley axis. The results are illustrated graphically.
Tatar Academic Theater Opera and Ballet named after M. Jalil: The beginning of the journey
Authors:   Russian opera houses, Shakirova Albina
Published: October 2024

The article describes how the Tatar Academic Opera and Ballet Theater named after A. M. Jalil. The period of time from the end of the 17th to the beginning of the 20th century is covered. Attention is focused on issues of repertoire and names of soloists.
Yaşanan Gerçekliğin Fotoğraflar Aracılığıyla Kodlanması Üzerine Bir İnceleme
Authors: Görgülü Eren
Published: October 2024

Akıllı iletişim teknolojilerinin yaşantımıza girmesi, bu alanda görülen inanılmaz gelişmeler doğrultusunda teknolojinin getirdiği ‘yaşamsal’ kolaylıklar sonrasında hayatımızın görsellik temeli üzerine kurulduğunu söylememiz mümkündür. Nitekim fotoğrafın icadı ile başlayan, görsel temelli teknolojik süreç önce hareketli görüntüler ile sinemayı yaşantımıza dâhil etmiş; ardından sesin de hareketli görüntülere eşlik etmesiyle sinema ve televizyonun kurgulanabilir yaşamsal gerçekliğin sesli/görüntülü bir anlatısal ifadesi haline dönüşmüştür. Günümüzde ise internet üzerinden hızlı ve sınır tanımaz bir üretim-tüketim ilişkisi söz konusudur. Bu süreçte durağan ve devingen görüntüler olarak fotoğraf ve video görüntüleri üretim – tüketim ilişkisi bağlamında toplumsal boyutta görsel bellek inşasında ve ikna sürecinde etkin bir biçimde kurgulanarak gerek iktidarı elinde tutanlar ve/veya yönlendirenler gerekse iktidara muhalif olanlar tarafından kullanılmaktadır. Bu çalışmanın amacı güncel yaşama ilişkin gerçekliğin fotoğraflar aracılığıyla nasıl kodlanarak topluma sunulduğunu ifade etmektir.
Inhibitive Effect of Mangifera Indica Extract on Mild Steel in Hydrochloric Acid Solution
Authors: Olisakwe HC , Osazuwa OK , Chukwuneke JL , Ezeanyanwu CS
Published: October 2024

This research investigated the corrosion inhibition potential of Mangifera Indica Peel Extract (MIPE) for mild steel in a 1 M HCl solution. The study explored the effects of extract concentration, solution temperature, and immersion time on the inhibition potential of MIPE using weight loss measurements at extract concentrations of 0, 1.0, 1.5, and 2.0 g/L, temperatures of 303 K and 323 K, and immersion times of 1, 2, 4, 6, and 8 h. Experimental results showed that MIPE significantly reduced the corrosion rate of mild steel, with maximum inhibition efficiency reaching 97.26% and 94.83% at 2.0 g/L MIPE concentration and solution temperatures of 303 K and 323 K, respectively. The uninhibited mild steel experienced increased corrosion rates with rising temperatures and longer immersion times. The inhibition efficiency of MIPE improved with higher extract concentrations and immersion periods. These findings underscore the potential of MIPE as an effective and environmentally friendly corrosion inhibitor in acidic environments.
Russian philosophy of all-unity as a prototype of integral science
Authors:   Russian University of Medicine, Moiseev V.I.
Published: October 2024

At the moment, Russian and foreign historiography is dominated by the attitude towards the Russian philosophy of unity as one of the schools that is of interest mainly to historians of philosophy. The author's projects “logic of all-unity” and “philosophy of neo-all-unitty” realize a fundamentally different attitude to the phenomenon of Russian philosophy of all-unity as an open project, which was only initiated by V.S. Solovyov and his followers. Within the framework of these projects, it is substantiated that the theoretical foundation of Russian philosophy of all-unity was a system of logical-philosophical concepts, which, as a whole, form a single system of non-classically rational type, the logic of all-unity. This system was isolated in its pure form and applied not only to a new interpretation of the Russian philosophy of all-unity, but also formed the basis of a new philosophical trend, the philosophy of neo-all-unity. The stage of further development of these projects is the formation of a new type of scientific knowledge of integral type, integral science. The article gives examples of construction of some sections of integral science, based on the logical means of the new formal axiomatic system – Projective Modal Ontology (PMO). Such sections as the theory of multi-unity, the logic of self-, other- and full-being, the logic of conditional and unconditional being, and the logic of the Absolute are briefly presented. In conclusion, an understanding of being as participation in the Absolute and a proof of the Absolute's being built on this basis are given. In this view, the ideas and methods of Russian philosophy of all-unity are still relevant and are in a state of constant rethinking and development.
Problems and Prospects of the Solovyov’s Studies
Authors:   Institute of philosophy Russian Academy of Sciences, Sidorin V.V.
Published: October 2024

The article briefly examines the state of the modern history of Russian philosophy, the problems of which are connected, according to the author, on the one hand, with the dominance in the research space, public consciousness and media, historical and memorial strategy and the desire for political and ideological actualization, and on the other – with the dominance of the language of self-description and models of self-interpretation of Russian philosophy of the first half the last century, as well as the gap between the community of historians of Russian philosophy and other segments of the Russian philosophical community. It is proved that the history of Russian philosophy lacks a fundamental historical and philosophical research program, as well as the search for new optics and perspectives of interpretation. It is shown that this general situation also affects the state of Solovyov’s studies, which have lost their previous inherent pace and ambition. At the same time, it is pointed out not only about the general significance of Vladimir Solovyov’s legacy for many lines of the history of the Russian religious and philosophical tradition, but also the possible relevance of certain aspects of his thought in modern discussions related, for example, to the theoesthetic paradigm, post-secularity studies, and discussion of perspectives of (post)metaphysics. The conclusion is made about the impossibility of simple retransmission and mechanical application of Solovyov’s thought to modern philosophical discussions and the need to search for new research strategies, ways of reading, models of its interpretation and creative use compared to those created in the past.
THE MINIMUM ECCENTRIC-DOMINATING ENERGY OF A GRAPH
Authors: Kumar A. Arun , Nandappa D. Soner , Nayaka S. R.
Published: October 2024

Let be a simple graph. A subset of vertices in is said to be an eccentric-dominating set if for each vertex not in , there exists at least one eccentric vertex in and . The cardinality of the minimum eccentric-dominating set is called the eccentric domination number, denoted by . In this article, we define and study the minimum eccentric-dominating energy , and compute the exact value for some standard classes of graphs. Also, we establish some bounds for .
ON SOME PROPERTIES OF THE MOD SEQUENCES OF -TH POWERS
Authors: Yamagami Atsushi , Inaba Youichi
Published: October 2024

We express the prime factorization of a composite number as with distinct prime numbers and positive integers . In this article, we prove that the sequence consists of -copies of . This result is a generalization of Theorem 6.1 (resp. Theorem 6.2) in [1] for the case where is of the form with a prime number and a positive integer (resp. with a prime number ).
Eventos supostamente atribuíveis à vacinação ou imunização preconizadas às gestantes: análise de série temporal
Authors: Silva Thales Philipe Rodrigues da , Pinheiro Bruna Luiza Soares , Silva Tércia Moreira Ribeiro da , Gusmão Josianne Dias , Silva Roberta Barros da , Matozinhos Fernanda Penido
Published: October 2024

Objetivo: Analisar os eventos supostamente atribuíveis à vacinação ou imunização (ESAVI) associados às vacinas Dupla adulto, Tríplice bacteriana acelular adulto, Hepatite B e Influenza e sua gravidade em gestantes de Minas Gerais. Métodos: Estudo epidemiológico, de série temporal sobre ESAVI registrados no Sistema de Informação do Programa Nacional de Imunizações no período de 2015 a 2020. Analisou-se 459 ESAVI em gestantes segundo tipo do evento, necessidade de atendimento médico e evolução do caso. Resultados: A vacina dTpa apresentou maior proporção de ESAVI nesse período (56,86%), seguida da vacina contra Hepatite B (29,41%), vacina contra Influenza (20,04%) e vacina Dupla adulto (16,00%). As manifestações locais foram mais prevalentes, sendo a dor no local da injeção a mais relatada. Destaca-se que gestantes vacinadas com a vacina Tríplice bacteriana acelular adulto e/ou com vacina contra Hepatite B tiveram uma maior proporção de eventos classificados como Erro de Imunização. Observou-se tendência significativa de aumento da taxa de ESAVI em decorrência da vacina Dupla adulto (p=0,024). Conclusão: Evidencia que a taxa de incidência ESAVI durante a gestação do estado foi baixa e que não houve um aumento no risco da gestante de apresentar algum evento adverso grave após a administração das vacinas recomendadas durante a gestação.