bluuebunny/crossref_metadata_2025 huggingface dataset:
Las implicaciones del deporte en Educación Física desde la perspectiva del materialismo filosófico de Gustavo Bueno
Authors: González Berruga Manuel Ángel
Published: March 2024

El objetivo de este artículo es el de señalar las implicaciones del concepto de deporte a través del materialismo filosófico de Gustavo Bueno en su obra Ensayo de una definición filosófica de la Idea de Deporte. Desde esta perspectiva, Bueno llega a la conclusión de que no hay una idea unívoca de deporte, sino que nos encontramos ante un concepto sobre el que se han depositado diversas acepciones según el objetivo físico, político, social o religioso atribuido al deporte. Esta diversidad conceptual habilita al docente de Educación Física a utilizar el deporte como un medio pedagógico encajándolo de diferentes formas en su planificación. La principal conclusión es que el deporte puede ser utilizado no solo desde la perspectiva centrada en la práctica del deporte en sí, con sus reglas y movimientos, o teniendo solo como objetivo la actividad física, sino que puede utilizarse con relación a otros ámbitos de la educación física como la expresión corporal o los deportes populares. Con relación al estado de Ecuador, el currículum de Educación Física genera espacios para pensar en la Educación Física desde la interdisciplinariedad de sus ámbitos y no solo desde lo estrictamente deportivo.
Historia para la liberación crítica a la voluntad (razón-práctica) Global
Authors: Bauer Carlos Francisco
Published: March 2024

La presente comunicación aborda una problemática vigente en la constitución de nuestra época. La misma se refiere a una crítica radical a la voluntad de poder como voluntad global, concebida como razón y práctica que actúa por primera vez en el horizonte histórico empírico del mundo intentado identificarse con el mismo. Este trabajo busca deconstruir la estructura de identidad homogeneizante que se produce y con ello a la voluntad global misma. Para esto procede exponiendo sintéticamente los tres dispositivos fundamentales que han operado en el proceso histórico de la co-modernidad, deteniéndome sobre todo en el tercer dispositivo, y desde aquí, sumergirme, a su vez, en los sub-dispositivos internos de este último y que a la vez se relacionan con los demas dispositivos. El trabajo no solo ronda una dimensión crítica, desde el compromiso con una tarea y militancia realizada, sino y fundamentalmente, intenta proporcionar marcos provisórios, constructivos y alternativos desde donde poder incursionar en dicha temática.
Justicia transicional en Colombia y participación ciudadana
Authors: Rodelo Garcia Margarita Rosa , Ramírez Nárdiz Alfredo
Published: March 2024

Este articulo pretende analizar la relación de la justicia transicional y la participación ciudadana hacia la consecución de una verdadera justicia con verdad, reparación y garantías de no repetición. El artículo se desarrolla en tres capítulos: una primera parte analiza los aspectos relevante de la justicia transicional en el plano internacional (Responsabilidad y obligaciones estales); una segunda parte estudia la importancia del Sistema Integral de Verdad, Justicia, Reparación y No Repetición, viendo aspectos como su implementación en Colombia (novedades de la justicia restaurativa orientadas a mejor el sistema); por último, se lanza una mirada a las garantías de no repetición que se enmarcan en los escenarios de participación ciudadana y la veeduría desarrollado en el marco del acuerdo paz y postconflicto. Se concluye con unas reflexiones frente a la justicia transicional y la participación ciudadana indicando que, aun cuando las víctimas han de ser el centro de la justicia, existen pocas garantías para el ejercicio de los escenarios de participación creados por ley. Este artículo se realiza bajo un método analítico-sistemático donde se revisan fuentes bibliográficos y documentales que permiten dar al lector un panorama más claro sobre el tema.
Democracia en el contexto histórico de principios de siglo XXI: una interpretación teórico-política
Authors: Berrocal Duran Juan Carlos , Villa Villa Sandra Irina
Published: March 2024

La presente investigación tiene como objetivo interpretar la democracia en el contexto histórico de principios de siglo XXI, desde una perspectiva teórico-política. Se organiza como una investigación cualitativa de alcance descriptivo a través del método analítico; las fuentes de recolección de la información son bibliohemerográficas además de criterios jurisprudenciales; asimismo, se indica que las técnicas utilizadas son la observación y el análisis de contenido, con las fichas de carácter mixto como los instrumentos. Se plantean tres acápites, los cuales son: 1. Acontecimientos relevantes de principios del siglo XXI; 2. Concepto de democracia; y, 3. Elementos característicos de la democracia reciente. Se puede concluir que, el paramilitarismo, las constituciones con incorporaciones de normativas internacionales, y el uso de las nuevas tecnologías, representan hechos trascendentales en los Estados catalogados como democráticos, a la par, se asume que la democracia implica que las cuotas de decisión le corresponden al pueblo. En todo caso, la democracia de inicios del siglo XXI está signada por dos particularidades, es decir la interpretación jurídica pro homine y el fomento del pluralismo por medio del uso de redes sociales.
Festividades religiosas en Tunja, una vía hacia la espiritualidad y la reactivación económica. Un análisis cualitativo desde el sector religioso y comercial, en tiempos de pandemia
Authors: Paola Rojas Yuly , Cetina Briceño Gloria María
Published: March 2024

La actividad turística de tipo religioso como hecho social y económico, ha cobrado gran interés, demanda y relevancia dentro del sector. Este trabajo se centra en analizar la percepción de las festividades religiosas en Tunja (Colombia) y su relación con el turismo desde la mirada del sector religioso y del comercial en tiempos de pandemia de Covid-19. La metodología del estudio se sustenta bajo un enfoque cualitativo, tras la aplicación de 19 entrevistas el análisis refleja que, a causa de la pandemia, no solamente la actividad económica se vio afectada sino también la fe de muchos feligreses se ha enfriado. Finalmente, los entrevistados de ambos sectores proponen alternativas para la reactivación comercial durante y post COVID-19 que permitan desarrollar una manera diferente de vivir el turismo religioso en complemento a la manera tradicional.
Roberto Esposito: la biopolítica como dispositivo inmunitario
Authors: Alarcón Consuegra Sara
Published: March 2024

Este escrito se centra en la perspectiva biopolítica de Roberto Esposito, para ello se ahonda en los conceptos de comunidad e inmunidad comprendiendo la semántica que hizo emerger la dinámica de la práctica biopolítica como proceso de inmunización. Esto entendiendo que la inmunización biopolítica radica a partir del vacío semántico que existe en torno al concepto de comunidad, ya que desde la modernidad se piensa por comunidad un grupo cerrado, el cual se conserva en la medida que cauterice aquello que represente un riesgo a la identidad de dicho grupo. En este sentido, la política que subyace del proceso de inmunización que comunica el significado moderno de comunidad, protege la vida de forma violenta, puesto que desde el interior de la comunidad sobrecargan la vida con límites al punto de negar la vida misma que trata de proteger.
Infectious mononucleosis
Authors: Editorial Article
Published: March 2024

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Polarization, Populism, and Bernie Sanders
Authors: Loomis Jenny
Published: March 2024

The rise of Bernie Sanders, populism, and polarization in the United States.
Quo vadis Europe: The EU – Turkey Refugee Deal – visionary blueprint or humanitarian disaster?
Authors: Foerschler Susi
Published: March 2024

Commentary
Being Moved
Authors: Brereton William
Published: March 2024

Focusing on Zimbabwe-born/South Africa-based Dan Halter's Rifugiato Mappa del Mondo (Refugee Map of the World) as my commentary's point of departure, the text demonstrates how an art museum can use works from its permanent collection to mobilize and engage in community-building with refugees and migrants. Embedding historical and contemporary discourses on migration topics, displaying works of refugee and migrant artists becomes vital for upholding values of cultural pluralism – and it proves to be meaningful when the work achieves mass resonance among museum visitors. 
Credits: Dan Halter (Zimbabwean, born 1977). Rifugiato Mappa del Mondo (Refugee Map of the World), 2016. Stitched-together new and used plastic-weave shopping bags. 7 (unique) from a series of 8. Overall: 72 x 150 inches (182.88 x 381 cm). Collection Buffalo AKG Art Museum. By Exchange: Elisabeth H. Gates Fund, James G. Forsyth Fund, Fellows for Life Fund, George Cary Fund and Gift of Mr. and Mrs. Lucien Garo, 2016 (2016:4). © Dan Halter. Image courtesy of the artist and WHATIFTHEWORLD.
Lauren McKee Paintings and Artist Statement
Authors: McKee Lauren
Published: March 2024

Paintings created for issue titled "The Mittens, the Dove and the Dress"
The Bottle
Authors: Gupta Abhay
Published: March 2024

A poem based on a dream, inspired by the Beats.
Why is the Independent Bernie Sanders Chairman of the Budget Committee?
Authors: Phalen Hunter
Published: March 2024

I examine the process of committee appointments and hypothesize why Senator Sanders and the Democratic party submit themselves to this odd relationship.
Book Review
Authors: Garcia Alexis
Published: March 2024

Review of A Hope More Powerful Than the Sea: One Refugee's Incredible Story of Love, Loss, and Survival, by Melissa Fleming (Flatiron Books, 2017), $13.68 (hardcover), 288 pages, ISBN: 978-1250105998
Universal Healthcare in the US
Authors: Coen Jenn
Published: March 2024

This is a draft of a new opinion piece on Universal Healthcare in the US.
Cut Ups
Authors: Smith Jack
Published: March 2024

These poems were constructed by using the “cut-up” method made famous by Beat author William S. Burroughs.
Bernie Sanders and The Welfare State
Authors: Yang Phillip
Published: March 2024

Bernie Sanders's values, from both economic and social justice viewpoints.
American Times
Authors: Liu Crystal Haoyang
Published: March 2024

This poetry is written in respect for Allen Ginsberg's Howl, and it is my own exploration of American pop culture.
Regional poverty as an important characteristic of the quality and standard of living of the population: analysis of trends and prospects for its reduction
Authors: Abramova Olga
Published: March 2024

The article is devoted to the study of the problem of regional poverty as an important component of the quality and standard of living of the population. The well-known regional ratings on the quality of life of the population, compiled by experts from the Agency for Strategic Initiatives and the universal rating agency RIA Rating, are considered. Using a non-parametric multidimensional method, a rating of subjects of the Russian Federation was compiled according to the integrated assessment of measurement of poverty. Five groups of regions have been identified among the subjects of the Russian Federation. The Samara region falls into group 4 with an integrated assessment of measurement of poverty below average, taking 49th position. The article carries out a structural analysis of the problem under study from a regional perspective and calculates poverty risk indices in the Samara region. Significant risks of becoming poor for families with children, small risks of poverty for pensioners, a decrease in economic poverty, and an increase in poverty among the population unemployed in the economy have been identified.
A matrix of SWOT analysis of the problem of regional poverty was compiled, which indicated the strengths and opportunities of the Samara region for the formation of effective poverty reduction policies. At the same time, it is also to highlight the need to develop a number of measures to reduce poverty, namely, the development of surveys of population budgets and awareness of citizens about social support programs, the development of small business infrastructure, especially for enterprises creating places for the disabled and pensioners, promoting the employment of women with children, etc. In general, the effective fight against regional poverty will be facilitated by the implementation of a program to reduce poverty in the region, the active application of the social contract, and the practical application of the above measures.
Teaching of Museological Documentation: A Study at the Federal University of Pará
Authors: Lima Jéssica Tarine Moitinho de , Velloso Mariana Corrêa
Published: March 2024

Teaching museum documentation plays a fundamental role in the sustainable management and preservation of cultural and scientific heritage in the Amazon region. This paper reflects on the importance and practices of teaching documentation of cultural assets in the Bachelor's Degree in Museology at the Federal University of Pará, in Brazil. Through a comprehensive understanding of the principles and practices of this discipline, future museologists become better prepared to assume professional and ethical responsibilities in their field of activity. The challenges and opportunities faced in the context of teaching this discipline at a federal university in the Amazon will be analyzed. To achieve this purpose, three case studies applied at the institution are presented, during the years 2022 and 2023, comparing the results with the literature on teaching, principles and practices of museum documentation. The conclusions highlight the relevance of the course for the training of museology students, displaying some innovative activities for teaching in the classroom.
A TEMPERATURE PRE-RECTIFIER WITH CONTINUOUS HEAT STORAGE AND RELEASE FOR WASTE HEAT RECOVERY FROM PERIODIC FLUE GAS
Authors: Qu Hengyu , Jiang Binfan , Liu Xiangjun , Xia Dehong
Published: March 2024

Flue gas from periodic furnaces with large temperature fluctuation is difficult to be recovered by regular heat exchangers. To recover that unstable waste heat, a temperature pre-rectifier (TPR) with honeycombed structure is developed to smooth down the temperature fluctuation by continuous heat storing and heat releasing. A three-dimensional model of TPR is constructed to analyze the heat transfer process. Temperature rectification rate η is defined to quantify the smoothing-down effect of TPR on temperature fluctuation. The relative size s* as the ratio of hole size to inner wall thickness (i.e., s* = s/δ), can be used to measure the capacity of heat release compared to that of heat storage. The quantity η reaches the highest value when the relative size s* is 1.0, and is increased with dimensionless length l*. When s* = 1.0, η firstly rises and then drops with the increment of s. The peak value of η can be achieved by an optimized hole size sopt. The sopt value increases exponentially with the inlet temperature fluctuation intensity. The TPR with segmented structure can enhance n with relatively short length. The three-segment structure with a proportion of 0.18:0.33:0.49 makes η > 0.947, which is recommended for application. Industrial experiments showed that the temperature fluctuation of flue gas can be rectified from 568-1709 K to 1089-1174 K (η = 0.926) by TPR, which verified that the TPR is an effective method for waste heat recovery from periodic flue gas.
FRACTAL STUDY ON HEAT TRANSFER CHARACTERISTICS OF FRACTURED DUAL POROUS MEDIA WITH ROUGH SURFACE
Authors: Yang Shanshan , Sheng Qiong , Zou Mingqing , Wang Mengying , Cui Ruike , Chen Shuaiyin , Zheng Qian
Published: March 2024

In order to study the influencing factors of heat transport characteristics in the rough fractured dual porous media,
the theoretical model of effective thermal conductivity (TC) in rough fractured dual porous media is established
in this paper. By calculating the thermal resistance and TC of rough cracks, it is found that the heat transport
capacity of the fracture is inversely proportional to the relative roughness and porosity and is proportional to the
solid-liquid TC ratio and the fractal dimension of the fracture. The heat conduction in the fractured dual porous
media is mainly controlled by the matrix. In addition, by comparing with other models and existing experimental
data, it can be seen that the heat transfer capacity of dual media is stronger than that of single porous media. The
predicted TC of rough cracks is lower than the experimental data, which is in line with the actual situation, and
the model is reasonable.
Reducing shallow foundation rotation due to reverse faulting using predefined shear planes
Authors: Baziar Mohammad Hassan , Rashedi Mir Mahdi , Azizkandi Alireza Saeedi
Published: March 2024

Permanent ground displacement due to faulting during strong earthquakes threatens the stability of civil structures. To protect surface foundations from faulting, several mitigation techniques have been developed. Owing to the limitations of earlier mitigation strategies for unidentified reverse faulting conditions, this research presents a novel mitigation system, including the installation of sliders beneath the wings of a V-shaped concrete element, to reduce footing rotation. To evaluate the effectiveness of the suggested mitigation strategy, concrete strength tests, a physical centrifuge test and a comprehensive numerical study for different fault locations and dip angles were conducted for the first time. Results demonstrated that the placement of the sliders beneath the V-shaped wings had a significant effect on dissipating the fault dislocation. Compared to the previous mitigation techniques, the proposed system decreased the foundation rotation from a high value (11°) to a low value (3·2°) for the worst-case scenarios. Furthermore, the friction coefficients among sliders and concrete, the concrete wing inclination angle, length and thickness were critical parameters to design the optimum proposed system. In contrast, soil layer thickness and relative density did not significantly affect the footing rotation.
When a Crisis Hits, Send in the Psychologists? A Latent Transition Analysis of Help-Seeking Behavior Among Swedish Healthcare Workers During the COVID-19 Pandemic
Authors: Appelbom Sophia , Finnes Anna , Wicksell Rikard K. , Bujacz Aleksandra
Published: March 2024

During a crisis, there is limited time to plan support initiatives for healthcare workers and few resources available to ensure that they engage with them. Using the context of the recent COVID-19 pandemic, this study aimed to investigate help-seeking behaviors among healthcare workers in relation to psychological support initiatives offered to them. Data from a Swedish longitudinal survey following healthcare workers from early (N = 681) to mid-pandemic (N = 396) were analyzed using latent class and transition analyses. We found three patterns of healthcare workers’ help-seeking behavior that applied to both time points: (1) engaging with different forms of group-based support, (2) not participating in any kind of offered support, and (3) only having been offered information-based support. The availability of support declined during the mid-pandemic. Group support users were primarily nurses and frontline workers, with higher levels of burnout symptoms. Our findings suggest that healthcare organizations should limit their implementation of psychological support during a crisis to a few key formats based on social support. Promoting participation from all staff groups may enhance the inclusivity, effectiveness, and sustainability of the support.
Preservation conditions of hot work hardening in die steel with regulated austenitic transformation during exploitation
Authors: Kruglyakov A. A. , Rogachev S. O. , Sokolov P. Yu. , Priupolin D. V.
Published: March 2024

Die steels with regulated austenitic transformation during exploitation (RATE steels) are a new class of tungsten-free steels for hot forming at operating temperatures up to 750 – 800 °C. High durability of the pressing tool and its long service life are ensured by the ability of these steels to preservation of hot work hardening. This circumstance distinguishes RATE steels from traditional alloy steels, which are prone to softening at high temperatures. However, the temperature ranges for the preservation of hot hardening in RATE steels was not systematically studied, which makes it difficult to use a pressing tool more efficiently. In this paper, we study the mechanical behavior of RATE die steel during thermo-mechanical treatment in a wide temperature range, including the stage of preliminary deformation at lower temperatures and the stage of main deformation at higher temperatures corresponding to operating temperatures of the pressing tool. The thermo-mechanical treatment was carried out using a hardening-deformation dilatometer DIL 805 A/D according to the compression mode. We obtained the true stress-strain curves and determined the mechanical characteristics and strain hardening index. Size of the former austenite grain in the steel structure after thermo-mechanical treatment was measured. The temperature-force conditions for enhancing hot hardening or stabilizing hot hardening, or softening, were established. It is shown that the hardening achieved at the stage of preliminary deformation at a temperature of 450 °C is enhanced at the stage of main deformation at temperatures in the range from 550 to 800 °C, while in this temperature range the tendency to increase hot hardening is weakened.
Effect of heat treatment on deformation inhomogeneity of carbon steel / stainless steel bimetal
Authors: Buyakova S. P. , Kayurov K. N. , Barannikova S. A.
Published: March 2024

The work is devoted to the study of the effect of annealing on mechanical properties and inhomogeneity of plastic deformation of a bimetallic plate made of stainless / carbon steel with the dimensions of the working part 50×7×2 mm. To develop laser technology for producing bimetals of various compositions, the contact zone of two dissimilar steels is of greatest interest. Since the performance characteristics of the entire product as a whole depend on the structure and properties of this zone, interaction of the components of the bimetal in the process of its manufacture leads to appearance of heterogeneity of various types near the interface and in the volumes adjacent to it. The research material was obtained by laser cladding of wire AISI 304 stainless steel on a plate of low-carbon steel St3. Bimetallic samples were subjected to vacuum heating at a temperature of 700 °C at various times from 2 to 8 h. The use of data on the distributions of local strains by the speckle photography method made it possible to consider the process of plastic flow in the initial section of tension diagram and to establish the effect of annealing temperature on plastic strain localization during mechanical tests. For a quantitative assessment of deformation inhomogeneity in the main and cladding layers, we used spatiotemporal distributions of local elongations and the corresponding values of the variation coefficient. It was established that the level of deformation inhomogeneity of microvolumes at the interface during tension is higher than that of the bimetal main layers. With increase in the annealing time, increase in the variation coefficient in the joint zone is noted, which is more significant on the stainless steel side, and this increases the probability of microcracks initiation. The increased level of deformation inhomogeneity of microvolumes of the cladding layer carburized zone is contingent on the increased localization of deformation in nearby microvolumes due to structural heterogeneity.
Formation of the gradient of structural-phase states of high-speed steel during surfacing. Part 1. Solving the Stefan problem with two movable boundaries
Authors: Nevskii S. A. , Bashchenko L. P. , Peregudov O. A.
Published: March 2024

The article considers theoretical study of solidification of the binary iron–tungsten system at a tungsten content of 18 wt. %. Such tungsten content is typical for heat-resistant alloys used in plasma-arc surfacing on the rolls surface. The axisymmetric Stefan thermal problem is solved for two movable cylindrical boundaries that separate three regions. In region 1, the melt is at the melting point; in region 2, the substance is in a two‒phase state, and in region 3 – a solid. The liquidus temperature was set at the interface of regions 1 and 2, and the solidus temperature – at the interface of regions 2 and 3. At these boundaries, a condition for the heat flows balance was given, from which a system of kinetic equations was obtained. This system was solved by numerical methods, without hypothesizing that the fronts of phase transformations move according to the law R ~ t1/2. Solution of the system of kinetic equations shows that the solidus boundary moves almost linearly. The liquidus boundary moves according to the parabolic law. For regions of the micrometer range in size, the processes of phase transformations take place in a time of about 5 ns, whereas for regions of the order of 10 μm in size – in a time of about 50 ms. Dependences of temperature fields on the radial coordinate at various points in time show that with increasing time, the dimensions of region 2 decrease, and as soon as coordinates of the liquidus and solidus boundaries become close, thecrystallization process stops. Further development of the model consists in taking into account the rotation of one of the media. The results obtained will serve as a material for the study of the Mullins-Sekerka two-front instability.
Effect of hydrogen on nickel oxide reduction on the surface of nozzle blade of a gas turbine unit
Authors: Fomina D. D. , Poilov V. Z. , Gallyamov A. N.
Published: March 2024

Currently, there is a growing interest in the use of hydrogen in the composition of fuel mixtures for turbojet engines and gas turbine units (GTU). The effect of hydrogen on heat-resistant nickel alloys of gas turbine blades has been little studied. In this regard, this work is devoted to studying the effect of hydrogen on nickel oxide reduction on the surface of the nozzle blade of a gas turbine engine. Hydrogen is a good reducing agent. Therefore, this article discusses the effects of hydrogen under various conditions with metal oxides, and methods of metal oxides reduction on the surface of the blades of a gas turbine engine. The thermodynamics of the interaction of aluminum, titanium, nickel and tungsten oxides with hydrogen fluoride and reactions of fluoride with hydrogen was investigated in the temperature range 273 – 1373 K. It was established that the interaction of aluminum oxide with hydrogen fluoride occurs in the temperature range from 273 to 1073 K, titanium oxide with hydrogen fluoride – from 273 to 373 K, nickel oxide with hydrogen fluoride – from 273 to 873 K. In this case, of the resulting fluorides, only nickel fluoride interacts with hydrogen at temperatures above 673 K. Hydrogen interacts with nickel oxide throughout the entire temperature range, and with tungsten oxide at temperatures above 1173 K. We studied the effect of hydrogen on heat-resistant nickel alloys of gas turbine blades subjected to preliminary fluorination and not treated with fluorine compounds. Nickel oxide reduction with hydrogen proceeds better after the preliminary fluorination process. In this case, particles 2 – 5 μm in size containing 90.16 % Ni are formed on the surface of the blade sample. Without fluorination, this process at 1223 K and duration of 1 h does not occur.
Wagner interaction coefficient between nitrogen and cobalt in liquid steel
Authors: Bolʼshov L. A. , Korneichuk S. K. , Bolʼshova E. L.
Published: March 2024

A simple theory of thermodynamic properties of liquid nitrogen solutions in Fe – Co alloys is proposed. This theory is completely analogous to the theory for liquid nitrogen solutions in alloys of the Fe – Cr system proposed previously by the authors in 2019. The theory is based on lattice model of the Fe – Co solutions. The model assumes FCC lattice. In the sites of this lattice are the atoms of Fe and Co. Nitrogen atoms are located in octahedral interstices. The nitrogen atom interacts only with the metal atoms located in the lattice sites neighboring to it. This interaction is pairwise. It is supposed that the liquid solutions of Fe – Co system are perfect. The initial values for the calculation are the Sieverts law constants for nitrogen solubility in liquid iron and in liquid cobalt. Result of the calculation is value of Wagner interaction coefficient in liquid iron-based alloys at 1873 K \(\varepsilon _{\rm{N}}^{{\rm{Co}}}\) = 1.8. This value is in good agreement with the experimental data obtained by Schenck, Frohberg and Graf, 1958; Maekawa and Nakagawa, 1960.
Physicochemical characteristics of new complex niobium-containing alloys
Authors: Zayakin O. V. , Kel’ I. N. , Renev D. S. , Sychev A. V. , Mikhailova L. Yu. , Dolmatov A. V.
Published: March 2024

The authors studied the physicochemical characteristics of new complex alloys containing, %: 11 – 30 Nb, 23 – 28 Si, 3 – 10 Al and 3 – 4 Ti. It was shown that complex alloys have the most favorable values of density and crystallization temperatures compared to standard ferroniobium (60 wt. % Nb). Complex alloys with a low concentration of niobium have acceptable crystallization temperatures and optimal density values (5740 – 6560 kg/m3). This allows the pieces of ferroalloy to be completely in the liquid steel when it is released into the ladle, and to be constantly in motion, which increases absorption of the leading components. When the niobium concentration increases to 30 %, phase composition of the alloy changes: a decrease in the proportion of the low-temperature FeSi phase with low density values and an increase in the proportion of the high-density ternary compound NbFeSi2 with a crystallization temperature of ~1713 °C. An increase in Nb concentration from 11 to 17 % leads to a decrease in the crystallization temperature, and a further increase to 30 % Nb, on the contrary, is accompanied by an increase in the liquidus and solidus temperatures to 1700 and 1610 °C, respectively, which is consistent with liquidus line in phase diagram of the Fe – Nb system with a minimum in Nb concentration range ~18 %. The best characteristics, both from the point of view of obtaining ferroalloys and use for alloying steel, belong to an alloy containing, wt. %: 17.1 Nb, 24.6 Si, 7.6 Al and 3 Ti. This alloy is characterized by the temperature of crystallization onset (1550 °C) below the liquid steel bath temperature and belongs to the category of low-melting alloys. It has optimal density values – 6390 kg/m3, which has a positive effect on the performance characteristics of niobium ferroalloys.
Development of technology for ingots production using electroslag remelting at direct current with consumable electrode rotation
Authors: Alekseev I. A. , Chumanov I. V. , Sergeev D. V.
Published: March 2024

The paper describes the problem of increasing the productivity of electroslag remelting (ESR) furnaces. The remelting technology on direct current is proposed as the most effective method. The description of the technology touches upon positive and negative effects affecting the specific productivity of smelting, energy consumption, and quality of the obtained ingots in terms of their physical and mechanical properties and chemical purity. The authors proposed the electroslag remelting method with rotation of the consumable electrode as a new technology, and realized a brief comparison with the external magnetic field application technology. The schemes that clearly demonstrate the principle of controlling the crystallization front shape and the thermal center localization in the slag bath are considered. A stationary numerical model for the slag bath of the operating semi-industrial furnace ESR A-550 on direct current with polarity reversing ability was developed. The mathematical apparatus consisting of electrothermal, hydrodynamic and convective parts was constructed. The authors designed the mesh domain for a slag bath located between the consumable electrode and the water-cooled crystallizer with diameters of 60 and 90 mm, respectively. The height of the sub-electrode zone is 10 mm. The current limit is 800 A and the voltage is 46 V. Numerical fields of current density and temperature distribution in the slag bath volume are obtained. The range of temperature values is located in the range from 1400 to 2200 °C at the peripheral and subelectrode zones of the slag bath, respectively. The scheme of the ESR furnace modernization is given in terms of mechanical part automation and transferring to direct current.
OXIDATIVE REGENERATION OF METAL COMPLEX CATALYTIC SYSTEM
Authors: Sakhibgareev Samat R. , Badikova Albina D. , Tsadkin Mikhail A. , Borisov Ivan M. , Kulyashova Irina N. , Sultanova Margarita R.
Published: March 2024

When carrying out thermocatalytic destruction of hydrocarbon feedstock, catalysts are deactivated due to the formation of surface coke, which blocks active centers. In order to restore their previous activity and selectivity, as well as extend their service life, a process of catalyst regeneration is carried out. One of the effective methods for restoring the original activity of deactivated catalysts is oxidative regeneration, which is based on the oxidation of coke deposits on the surface of the catalyst.
The article examines the dependences of the formation of surface coke when varying the temperature regime of the process from 450 °C to 550 °C during the thermocatalytic destruction of heavy petroleum feedstock – West Siberian oil fuel oil in the presence of a new metal complex catalytic system, where the active component is a chloroferrate complex (NaFeCl4 or TCFN) in an amount 10 %, deposited on a carrier, which is a deeply decationized Ymmm zeolite of the acidic form (H-form). The patterns of oxidative regeneration of a metal-complex catalytic system were studied by distilling off highly volatile products in a flow of inert gas (helium) and oxygen-containing gas.
During the experiments, it was found that with an increase in the temperature of the thermocatalytic destruction process from 450 °C to 550 °C, a slight increase in coarse deposits on the surface of the catalyst was observed from 2,6 % wt. up to 3,5 % wt. respectively. When carrying out the process of oxidative regeneration of a carbonized catalyst with air oxygen (in a flow of helium) at a temperature of 500 °C for 60 min only volatile components are initially removed, and further calcination takes up to 180 min allows for complete burning of surface coke.
OPTIMIZATION OF THE CONDENSATE PUMPING SYSTEM AT THE GASOLINE SELECTIVE HYDROTREATING PLANT
Authors: Lavrentev Vitaliy S. , Makhmudov Bulat R. , Fomina Vera V. , Kuvaitsev Dmitriy A. , Zatylkin Nikita S. , Anpilogov Sergey V.
Published: March 2024

The article discusses issues related to energy saving of the coolant – high, medium and low pressure water vapor in the condensate pumping system at the gasoline selective hydrotreating plant. The analysis of the current condensate pumping system is carried out and its main disadvantages are indicated. Retrofitting of the pumping system is proposed. A return line has been added and a pair of centrifugal pumps has been included in the technological scheme, a calculation has been made. The replacement of the equipment will optimize the steam consumption inside the gasoline selective hydrotreating plant and will reduce the cost of repair and maintenance of the unit, as well as electricity consumed for technological needs.
PHYSICAL AND CHEMICAL PROPERTIES OF OIL FRACTIONS FROM GAS CONDENSATE OF AL-MASILA FIELDS (REPUBLIC OF YEMEN)
Authors: Saleh Ahmed Taha Abdullah Galeb , Gilmutdinov Amir T. , Lapshin Igor G.
Published: March 2024

The results of physical and chemical studies of gas condensate fractions, including gasoline, kerosene and diesel, are presented. Experiments were carried out on the separation of gasoline, kerosene and diesel fuel from gas condensate into fractions. The analysis showed that the collected gas condensate contains 38.02 % gasoline with a boiling point of 180 °C, 20.87 % kerosene with a boiling point of 140–240 °C and 43.67 % diesel fuel with a boiling point of 180–360 °C. The 140–240 °C fraction was obtained by secondary distillation of the straight-run fraction. The data obtained confirm that these fractions are high-quality raw materials for the production of motor gasoline, diesel fuel and jet fuel that meet modern standards. As a result of physical and chemical studies, the properties of the above mentioned fractions and their potential in the production of commercial petroleum products were determined.
STAGES OF ACCUMULATION OF OIL DROPLETS AND GAS BUBBLES IN THE DOME FOR CASES OF DEEP-SEA SPILLS: PART 2
Authors: Kildibaeva Svetlana R. , Stolpovsky Maxim V.
Published: March 2024

In a previously published article, the problem of mathematical modeling of the operation and installation of a special device – a separator dome designed to collect hydrocarbons for cases of deep-sea leaks was given, three initial stages of modeling the installation of the device were described. This paper describes in detail the remaining stages of installing the dome: the accumulation of a layer of gas, the final stage of installing the dome, when the tubes for pumping oil and gas are connected to the device and the device begins to work in stationary mode. Let's take a closer look at each of the stages. The fourth stage of the dome installation is associated with the achievement of a given height (at which the gas bubbles have not yet passed into the hydrate state) and the beginning of the migration of gas bubbles inside the dome. First, the gas bubbles migrate into layer of liquid immiscible with water, then in the oil layer. During this process, all the gas coming from the jet completely enters the tank. At the fifth stage, gas accumulations inside the tank are considered. At the sixth stage, the study of the accumulation of layers of gas and oil continues, but at the same time the reservoir itself sinks to the bottom of the reservoir at a constant speed. This is necessary to subsequently secure the dome and prevent oil and gas from leaking out of the dome. The seventh stage is the final one. At this stage, we believe that the dome is fixed on the ocean floor, pipes for pumping oil and gas are connected to it. As a result of the created mathematical model of the dome-separator operation, dependences characterizing the process of installation and functioning of the dome, the temperature dependences of gas and oil layers accumulated inside the dome, as well as the dynamics of accumulation of the corresponding layers in the dome are obtained. The characteristic start and end times of each of the stages are described.
One Hundred and Fifty Years of Change on the Great Plains
Authors: Peterson A. Townsend
Published: March 2024

Robert Benecke (1835-1903) was a St. Louis photographer who was hired by the Kansas Pacific Railroad to take promotional photographs along the entire length of the Railroad. Benecke traveled from Kansas City to Denver in the early 1870s, creating a rich legacy of views of the Great Plains at a very early date. In this book, Benecke's landscape photographs are paired with new photographs of the same views. Comparing the old and new photographs, the reader can appreciate how the region has changed over the 150 year time span. This book presents pairs of photographs from across the Great Plains, taken in 1873-1874 and in 2021-2023. The book emphasizes how the Great Plains region has changed in terms of its landscape, vegetation, and human and natural systems. The book is presented as an open-access ebook, and is also available in hard-copy format on a print-on-demand basis.
ПРАВОВОЙ АНАЛИЗ ЛИЦЕНЗИОННЫХ СОГЛАШЕНИЙ К MMORPG
Authors: ЗВЕРЕВ Максим Олегович
Published: March 2024

Статья посвящена отдельным положениям в лицензионных соглашениях различных широко известных массовых многопользовательских ролевых онлайн-игр (MMORPG), таких как Linage 2 (тип игры free-to-play) и World of Warcraft тип игры pay-to-play), а также более поздней Axie Infinity (тип игры play-to- earn). Положения лицензионных соглашений к компью- терным играм являются ярким примером некорректных и зачастую не имеющих законной силы условий. Стре- мясь получить доступ к игре, игроки беспрекословно принимают их и, не зная о своих правах или стремясь избежат дорогостоящих судебных разбирательств, редко оспаривают. В этой связи, а также в связи с цен- ностью игровой индустрии для международной эконо- мики в статье произведен правовой анализ некоторых положений лицензионных соглашений указанных компьютерных игр.
ПРОБЛЕМА СОХРАНЕНИЯ АВТОРСКИХ ПРАВ В МАРКЕТИНГОВЫХ ИССЛЕДОВАНИЯХ: НОВЫЕ ВЫЗОВЫ В ЭПОХУ ИСКУССТВЕННЫХ НЕЙРОННЫХ СЕТЕЙ
Authors: ПЛЕТНЕВА Елизавета Игоревна
Published: March 2024

В статье рассмотрено влияние нейросетей на интеллектуальную собственность в маркетинговых исследованиях. Автор утверждает, что растущее использование искусственного интеллекта и машинного обучения в маркетинговых исследованиях создает новые проблемы для защиты прав интеллектуальной собственности. Статья дает представление о правовых тенденциях, связанных с использованием технологий в маркетинговых исследованиях, которые были проанализированы с помошью количественного контент-анализа и метода кейсов (case studies). Статья представляет собой ценный ресурс для исследователей, практиков и политиков, заинтересованных в проблемах интеллектуальной собственности и искусственного интеллекта.
TIJIRIT GOLD ORES DISTRICT IN MAURITANIA
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, MYKHAILOV Volodymyr , VIRSHYLO Ivan ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, ZAGNITKO Vasyl ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, KRAVCHENKO Dmytro ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, DUBYNA Oleksandr ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, SUKACH Vitaliy ,   Institute of Geochemistry, Petrology and Ore Formation NAS Ukraine, Kyiv, Ukraine, CHULKOV Sergii ,   Institute of Geophysics NAS Ukraine, Kyiv, Ukraine
Published: March 2024

The distribution of a new gold ore district in the Republic of Mauritania – Tijirit, which is associated with the greenstone belt (GSB) of Sebkhet Nich of submeridional extension, is substantiated. It is located 25–30 km to the east of the Reguibat GSB, where the large Tasiast gold deposit is known. The coincidence of the structural position of these two objects and direct signs of gold ore mineralization in the territory of the Tijirit ore district in the form of contrasting lithochemical anomalies of gold, grab sample and trench sample with an increased gold content make it possible to highly evaluate the prospects of its gold ore mineralization. In the ore district, four submeridional to north-northeast trending ore-bearing zones have been identified, within which a number of gold occurrences have been established: Sophie-I, II, III, Lily, Eleonore, Eleonore East, Salma. They coincide with the weakened zones of the same direction, as a rule, they are confined to the contacts of rocks of different composition (metabasalts, metasandstones, banded iron formations, granites), stand out on space image, in geophysical fields, and control the placement of mineralization zones. Of these zones, the most interesting for further geological exploration works is the relatively poorly studied Eastern mineralization zone, which is confined to the contact of the Salma granites and the metabasites of the eastern wing of the Sebkhet Nich GSB. It is associated with the Eleonore East and Salma gold occurrences, numerous lithochemical anomalies, grab, trench and core samples with increased gold content (up to 42–100 g/t). It is recommended to concentrate further geological exploration work within this zone. A number of gold deposits in Ukraine (Sergiivske, Balka Shiroka, Balka Zolota, Surozke) are also associated with the Mesoarchean greenstone structures of the Ukrainian Shield. We hope that the experience of studying gold ore objects in West Africa will help to conduct an objective assessment of gold ore objects in Ukraine.
The Need to Harmonize the Labor Legislation of Pharmaceutical Workers of the Member States of the Eurasian Economic Union (EAEU)
Authors: Batusova E. S.
Published: March 2024

The paper is devoted to topical issues of legal regulation of the work of pharmaceutical workers both at the level of international legal acts of the Eurasian Economic Union (EAEU) and at the level of national legislation of the member states. These problems include the lack of a uniform integrated approach to the regulation of the work of pharmaceutical workers in international legal acts and its fragmentation. This leads to a decrease in the effectiveness of legal regulation of these categories of subjects of labor law. The situation gives rise to two dialectically interrelated trends at the EAEU level. On the one hand, international legal acts on the drug market of this organization contain norms that regulate the work of pharmaceutical workers. On the other hand, these norms do not cover all aspects of the work of pharmaceutical workers. The solution to this problem is seen in changing the international legal acts of the EAEU on the drug market by stipulating the norms regulating the work of pharmaceutical workers, considered in a single system and in close relationship with pharmaceutical activities. This is possible through the analysis, and in the future, the use of positive legal experience in regulating the labor of pharmaceutical workers in the EAEU countries to develop separate sections of the international legal acts of the EAEU in the field of regulation of the pharmaceutical market (in the form of appendices thereto).
Making Phase-Picking Neural Networks More Consistent and Interpretable
Authors: Park Yongsoo , Delbridge Brent G. , Shelly David R.
Published: March 2024

Improving the interpretability of phase-picking neural networks remains an important task to facilitate their deployment to routine, real-time seismic monitoring. The popular phase-picking neural networks published in the literature lack interpretability because their output prediction scores do not necessarily correspond with the reliability of phase picks and can even be highly inconsistent depending on how we window the waveform data. Here, we show that systematically shifting the waveforms during training and using an antialiasing filter within the neural network architecture can substantially improve the consistency of the output prediction scores and can even make them scale with the signal-to-noise ratios of the waveforms. We demonstrate the improvements by applying these approaches to a commonly used phase-picking neural network architecture and using waveform data from the 2019 Ridgecrest earthquake sequence.
The Image of Chinese Law in the Writings of European Missionaries of the 16th Century
Authors: Yan He
Published: March 2024

In the mid-1600s, European missionaries journeyed to China, producing a wealth of travel diaries, scholarly writings, and reports. These missionaries meticulously documented China's political and legal systems. This study delves into the Ming Dynasty missionaries’ interpretations of Chinese law, highlighting the historical context and its mutual influence with European culture. Our findings indicate that, during a certain period, Chinese law was portrayed in European culture as the cultural “other”. This representation not only served as a self-examination and reflection for European culture but also mirrored its understanding of its own cultural identity. While grounded in reality, these descriptions largely represent European cultural projections.