bluuebunny/crossref_metadata_2025 huggingface dataset:
Онлайн-отзывы и поведение потребителей: социологический анализ
Authors: Кочергин Даниил Юрьевич , Кривошеев Владимир Вениаминович
Published: September 2024

The article, based on empirical research, shows the impact of consumer reviews of various goods and services on their behavior. At the same time, it is revealed that Avito is the main platform for the promotion of services by performers. The most effective promotion strategy, as the study showed, is to combine the specified Internet service and social networks. It was found that there are many advantages of Avito in comparison with other sites, which are fame, reliability, a large loyal audience, as well as a significant variety of categories of goods and services put forward. In addition, the high adaptability of this Internet site for service providers was revealed. The study also showed that among the shortcomings, the prevailing opinion was about the slowness and inertia of the site when introducing innovations, frequent technical problems and updates that were carried out without warning users. Cases of high and unfair competition in some niches, as well as cases of fraud, were also of concern. The study made it possible to make some recommendations aimed not only at improving the activities of the Avito Internet service, but in general e-commerce and indicating a variety of services using modern digital platforms, which, as the authors and not only them see it, have a great future.
Занятия физической культурой как средство преодоления эмоционального выгорания учителей общеобразовательных школ
Authors: Гончаров Виктор Иванович , Лехан Лилия Валентиновна
Published: September 2024

In the process of prolonged work, representatives of the teaching profession may develop emotional burnout, manifested in a number of negative reactions: psychological, psychosomatic, behavioral. This negatively affects not only the well-being and self-perceptions of teachers, but also the process and results of their activities. In this regard, the search and development of effective means of preventing and correcting this type of professional deformation is becoming an important task for researchers. One of these means may be physical exercises. The presented study was carried out precisely in line with this possibility.Its purpose was to develop and experimentally evaluate the effectiveness of a special program of physical exercises to overcome emotional burnout among teachers of secondary schools, whose activities are associated with a significant risk of its occurrence. This program provides for the preferential use of dancing and dance movements to music during the school day, compliance with hygienic standards of work and rest, etc. It finds a positive emotional response from those involved, helps to improve their health and improve their level of performance.
Controle de qualidade de gel de ácido salicílico num contexto acadêmico
Authors: Santos Isabela Rigolin Bertussi Alves dos , Martins Adriana Aparecida , Sousa Rafaella Rodrigues de , Morais Jonatas Expedito Manguci de , Fróes Bárbara Milani , Tescarollo Iara Lúcia
Published: September 2024

Aulas práticas permitem aprimorar as competências técnicas dos estudantes e ampliar a correlação entre a teoria e a prática. O controle de qualidade de produtos desenvolvidos em farmácias de manipulação chama atenção devido à relevância do assunto e impacto na saúde dos pacientes. O ácido salicílico é um fármaco de uso tópico que apresenta propriedades queratolíticas, sendo muito empregado no cuidado da acne vulgar. A incorporação do ácido salicílico em géis torna-se um desafio farmacotécnico em virtude de suas características físico-químicas, como baixa solubilidade em meio aquoso. O objetivo deste estudo foi realizar o controle de qualidade de um gel contendo 1,0% de ácido salicílico, desenvolvido em laboratório de ensino farmacêutico. Foram realizados ensaios físico-químicos como identidade, aspecto, densidade, conteúdo, pH, teor e microbiológicos. Embora a amostra tenha sido aprovada nos testes de identidade, aspecto, densidade, conteúdo, pH e teor, apresentou problemas de precipitação durante o ensaio de centrifugação, sugerindo instabilidade física que pode comprometer a eficácia do produto. Os ensaios propostos demonstraram ser simples e fáceis de serem executados na prática, exigindo poucos recursos e apresentando boa reprodutibilidade. No entanto, a precipitação observada no gel ressalta a importância de ajustes na formulação para garantir a qualidade e eficácia. Este estudo contribui para a discussão sobre fatores que podem interferir na qualidade de produtos manipulados, destacando a importância do controle de qualidade rigoroso.
Presentación
Authors: Rivero Ortega Ricardo , Rastrollo Suárez Juan José
Published: September 2024

Introducción del número.
How Imperialism Sabotages African Sovereignty: The Contradictions between Economic Sanctions and Free Trade
Authors: Farnia Navid
Published: September 2024

This paper highlights how sanctions regimes constitute economic warfare and are thus incompatible with free trade. It centres on the efforts of The International People’s Tribunal on US Imperialism, which held a series of virtual hearings in 2023 to assess the impact of sanctions, blockades and economic coercive measures against various countries across Africa, Asia and Latin America. The participants of the Tribunal documented sanctions’ debilitating impact. As an economic weapon that perpetuates imperialist domination under neocolonial terms, sanctions undermine the power of free trade. This paper details the conclusions derived from the Tribunal to argue that the African Continental Free Trade Area (AfCFTA) cannot succeed under conditions of imperialist economic coercion. Instead, the AfCFTA must be undergirded by a Pan-Africanist and internationalist ideological orientation that enables all African countries to operate on equal terms and as genuine trade partners.
An Analysis on the Historical Transformation and Consequences of the Relationship Between Theoria and Techne
Authors: Özalp Ahmet
Published: September 2024

The subject of this study is the historical transformation of the relationship between the concepts of theory/theoria and techne/techne-logie. Methodologically, the meanings of theoria and techne in ancient Greece are taken as reference. Then, it is explained how this relationship, in which theoria is in a privileged position, has changed with the modern period and where the process has evolved. The aim of the study is to explain the risks of techne, whose relationship with theoria has been severed. Theoria is the activity of thinking about and questioning something. Since it was an end in itself, it was considered a divine activity in ancient times. Techne, on the other hand, was the knowledge of making and doing something. The knowledge of the craftsman was such a knowledge and it was instrumental. With the modern period, the transformative effect of technological developments on nature and society ensured that it was perceived in an impartial, irreversible and positive way. Despite the destructive effects it caused, technology became a commodity and a goal. Considering that today, technology has exceeded the dimension of digitalization and we have entered the era of intelligent robots, albeit artificial, it is a necessity to re-establish the connection between techne-logie and theoria.
STATE-OF-THE-ART AND DEVELOPMENT TRENDS OF GEOGRAPHIC INFORMATION SYSTEMS
Authors: Alchinov A.I. , Gorokhovsky I.N. , Akif’eva E. V.
Published: September 2024

When managing complex organizational and technical systems, decision support remains relevant due to the growing role and capabilities of geographic information systems (GISs). This survey is devoted to GISs. We analyze the level of their representation in the world and Russian environment, the peculiarities of their development, and the main related results obtained at the Trapeznikov Institute of Control Sciences, the Russian Academy of Sciences. We highlight the technologies and functionality of GISs that are in high demand in the field of management. A GIS is interpreted as a mechanism to process and support managerial decisions. The main foreign and Russian GISs are reviewed, including their main characteristics, applications, and development trends as well. We describe geoinformation technologies and algorithms implemented in full-fledged GISs and also those providing platforms for creating various-purpose GISs.
STRUCTURAL SHIFTS AND THE PARTICIPATION OF RUSSIAN INDUSTRIES IN GLOBAL VALUE CHAINS: AN ANALYSIS USING WORLD INPUT–OUTPUT TABLES
Authors: Varnavskii V.G.
Published: September 2024

Russia actively participates in the international division of labor, global trade, and cross-border value chains. Foreign trade represents a significant share of its gross domestic product. In recent years, the Russian government has been strengthening its public policy to carry out infrastructure and production projects as well as use tax, credit, budgetary, and other policy measures to stimulate economic growth. Hence, there is a growing demand for economic research using mathematical models for managing the economy and industries based on world input-output models with foreign trade blocks highlighted therein. This paper introduces into scientific circulation the world input-output tables created in recent decades, including their brief overview. We propose a model for the Russian economy based on Leontief’s Input–Output tables in which each industry’s supplies of products to other industries are decomposed into domestic output and import flows. The model is verified using an example of the mining, manufacturing, and transport complexes of Russia. Their output dynamics and structural shifts are estimated for the period 2000–2018 considering the foreign trade component. Special attention is paid to the participation of these complexes in Global Value Chains (GVCs). We present and analyze formulas for determining the participation of industries in GVCs. According to the calculations, Russia’s involvement in mining, manufacturing, and transport GVCs is comparable with other countries having large territories, mineral reserves, and transport communications, such as the United States and Australia. Some promising lines to improve the model are described.
FORECASTING THE IMPACT OF CONTROL ACTIONS ON THE SECTORAL STRUCTURE DYNAMICS OF A LABOR MARKET BASED ON THE BALANCE MATHEMATICAL MODEL
Authors: Nevecherya A.P. , Popova E.V.
Published: September 2024

This paper proposes an approach to considering control actions on the sectoral structure dynamics of a labor market when forecasting sectoral employment indicators. The forecasting scheme is based on the balance mathematical model of inter-sectoral labor resource movements. In the forecasting scheme considered previously, the trends of indicators characterizing inter-sectoral labor force mobility were determined independently of each other. In what follows, this forecasting scheme is modified by introducing a grouping method for the indicators of inter-sectoral labor resource movements and a criterion for determining the general trend of indicators within each group. The modified forecasting scheme is applied to calculate sectoral employment forecasts for the labor market of the Russian Federation in 2011–2016, and the forecasts are compared with the previous results. The expected employment rate is forecasted for the end of 2022 using sectoral employment and unemployment data for 2017–2021 according to the second edition of the All-Russian Classifier of Types of Economic Activity (OKVED). A method for determining the result of control actions is presented on an example of the Russian Federation labor market in 2017–2022: changes in the sectoral employment forecasts are demonstrated in the case of considering control actions on the agricultural and industrial sectors of the market.
ASSESSING THE EFFECTIVENESS OF INTELLECTUAL TECHNOLOGIES FOR IDENTIFYING HAZARDOUS COMBINATIONS OF EVENTS IN CIVIL AVIATION FLIGHT SAFETY MANAGEMENT
Authors: Varyukhina E.V. , Klochkov V.V.
Published: September 2024

This paper proposes an approach to assessing the effectiveness of intellectual technologies (artificial intelligence and machine learning) for identifying hazardous combinations of events in air transport systems. The influence of such technologies on flight safety and the aircraft’s total cost of ownership is formalized. A simple model is developed to assess the effectiveness of implementing intellectual technologies when identifying a single hidden problem. This model is qualitatively analyzed to reveal the role of its parameters (the size and flight hours of the aircraft fleet, the duration and cost of systemic problem elimination, and damage from events of different severity). In addition, we model the identification and elimination of hazardous combinations of events during the life cycle of air transport systems considering the learning effect. According to this effect, the intensity of hidden systemic problems decreases over time with the accumulation of experience in the operation of an air transport system and the gradual elimination of such problems. The relative acceleration in the identification of hidden patterns is the main indicator that characterizes intellectual technologies for identifying such patterns in incidents. Both types of models can be used to estimate the dependence of expected losses on this indicator. It is also important to consider the dependences of model calculation results on other parameters of the models, including the duration and cost of eliminating the identified problems, damage from various events, and the size and flight hours of the aircraft fleet. As is demonstrated below, intellectual technologies are most effective in an air transport system with a small aircraft fleet and a low intensity of aircraft operation.
MODELING OF THE TARGET’S INTERCEPTION DELAY IN AN ADT GAME WITH ONE OR TWO DEFENDERS
Authors: Galyaev A.A. , Samokhin A.S. , Samokhina M.A.
Published: September 2024

This paper considers the Attacker–Defender–Target (ADT) problem with one or two defenders in a 2D statement. By assumption, the target and defenders move in a straight line with a constant velocity whereas the attacker moves along a catch-up trajectory with an unbounded radius of curvature. Compared to the target’s velocity, the defenders move slower whereas the attacker faster. The essence of using defenders is that the attacker first intercepts them and only then switches to pursuing the primary target. As a result, the time of intercepting the primary target increases, and the target may become unattainable for the attacker due to a limited fuel capacity. The angles and times of launching the defenders are optimized, including the case where both defenders are launched on the same side of the target. Different models of the homing system of an autonomous attacking vehicle are studied: moving to the center of mass of all pursued objects and moving to the nearest target by distance or by angular range. Numerical simulations are carried out, showing the importance of choosing the angle of launch of the defenders and the reasonability of using the second defender. Also, scenarios are obtained in which using defenders makes the primary target unattainable for the attacker.
UJI AKTIVITAS ANTIOKSIDAN CESSA STERA WEDANG HERBAL TANPA GULA (ANTIOXIDANT ACTIVITY TEST OF CESSA STERA AS HERBAL DRINK WITHOUT SUGAR)
Authors: Marsandah Marsandah , Musfira Ainun , Agustina Ayu Safitri , Karneng Syahdam
Published: September 2024

This study aims to evaluate the antioxidant content and organoleptic properties of herbal tea using a mixture of secang wood and stevia leaves. The sample preparation method involves separation based on wetness level, washing, drying, and grinding to powder. Phytochemical tests showed the presence of flavonoids, saponins, alkaloids, tannins, terpenoids and steroids in both samples. The water content test shows the value is in accordance with the quality standards for packaged dry tea. Antioxidant activity was tested using the DPPH method, and the herbal wedang formulation with a proportion of 1:1 (FIII) showed the highest antioxidant activity of 76%. Organoleptic tests showed that the panelists really liked the color, aroma and taste of the FIII formulation. The overall results show that the FIII formulation is the best choice with high antioxidant content and good acceptance from consumers.
A combined experimental and computational exploration of heteroleptic cis-Pd2L2L’2 coordination cages through geometric complementarity
Authors: Tarzia Andrew , Shan Wentao , Posligua Victor , Cox Cameron , Male Louise , Egleston Benjamin , Greenaway Rebecca , Jelfs Kim , Lewis James
Published: September 2024

Heteroleptic (mixed-ligand) coordination cages are of interest as host systems with more structurally and functionally complex cavities than homoleptic architectures. The design of heteroleptic cages, however, is far from trivial. In this work, we experimentally probed the self-assembly of Pd(II) ions with binary ligand combinations in a combinatorial fashion to search for new cis-Pd2L2L’2 heteroleptic cages. A hierarchy of computational analyses was then applied to these systems with the aim of elucidating key factors for rationalising self-assembly outcomes. Simple and inexpensive geometric analyses were shown to be effective in identifying complementary ligand pairs. Preliminary results demonstrated the viability of relatively rapid semi-empirical calculations for predicting the topology of thermodynamically favoured assemblies with rigid ligands, whilst more flexible systems proved challenging. Stemming from this, key challenges were identified for future work developing effective computational forecasting tools for self-assembled metallo-supramolecular systems.
Mathur v. Ontario
Authors: Wood Stepan
Published: September 2024

In January 2024, the Court of Appeal for Ontario heard an appeal from a lower court’s dismissal of the first Canadian children’s climate case to be decided on the merits. Mathur v. Ontario alleges that Ontario’s climate change legislation, target and plan violate young people’s rights under sections 7 and 15 of the Canadian Charter of Rights and Freedoms by committing the province to dangerously high levels of greenhouse gas (GHG) emissions. This article argues that there are good grounds to allow the appeal. Some favourable findings will likely be upheld, including the court’s acceptance of climate change science, the global carbon budget, global GHG targets, the inadequacy of Ontario’s new target, the disproportionate impacts of climate change on youth and Indigenous peoples, its rejection of a de minimis defence, and its conclusion that the case as a whole is justiciable. There are, however, grounds to reverse the court’s holdings that Ontario’s share of global GHG emission reductions is not justiciable, the alleged harm is not the result of the impugned state action, the claimed right is positive rather than negative, a positive right is not warranted in this case, any deprivation of section 7 rights accords with principles of fundamental justice, and the impugned state action does not constitute age discrimination. The article also addresses some issues left unresolved by the lower court that may prove important on appeal. Whatever happens, the case will set a key precedent for Canadian environmental rights litigation.
ANÁLISIS DE LA GESTIÓN DE RESIDUOS PARA REDUCIR EL IMPACTO AMBIENTAL EN UNA EMPRESA CONSTRUCTORA
Authors: Morales Suárez Bruno Francisco , More Flores Anderson Alexis , Lozano Silva Nelso Aníbal , Pérez López Lizbeth
Published: September 2024

El análisis del impacto ambiental fue el objetivo de este estudio y, la gestión de residuos en empresas que se dedican a la construcción. Se revisó exhaustivamente de forma bibliográfica incluyendo informes de instituciones del estado, informes académicos y data estadística. Los hallazgos resaltaron lo urgente que resulta la implementación de medidas que mermen el impacto medio ambiental por parte de las actividades de construcción. Sin una política de practicidad sostenible, la forma como el hombre contamina, podría empeorar debido al crecimiento del rubro constructor en el país. El estudio destacó la necesidad de propuestas sostenibles a nivel nacional para evitar un aumento significativo en la contaminación ambiental. Asimismo, El estudio también subrayó qué tan importante es adoptar política de practicidad sostenible en el sector de la construcción. Entre los resultados, se observa gran responsabilidad por parte de las empresas dado que no gestionan sus residuos. En conclusión, se determinó la gestión de residuos para mitigar el impacto ambiental en empresas constructoras. Los hallazgos destacaron la urgencia de implementar medidas sostenibles y la importancia de considerar el impacto directo en la salud y la contribución potencial a los desastres naturales. Las recomendaciones enfatizaron el adoptar una práctica sostenible en el sector y rubro constructor, para mitigar los impactos ambientales negativos
Stratégies de reproduction de Marcusenius ussheri (Pisces, Mormyridae) en fonction des conditions hydrologiques créées par la construction du barrage hydroélectrique d’Ayamé I sur le cours principal de la rivière Bia (Côte d’Ivoire)
Authors: Ouattara M. , Diomande D. , Boussou K.C. , Gourène G.
Published: September 2024

La biologie de la reproduction de Marcusenius ussheri a été étudiée au cours de 12 mois d'échantillonnage dans le bassin de la rivière Bia. Le cours d’eau est divisé en trois zones écologiques différentes nées de la présence d'un barrage hydroélectrique sur son lit principal (amont, lac et aval). Les poissons ont été pêchés essentiellement aux filets maillants. La taille de première maturité sexuelle présente une variation le long du cours d’eau (amont, lac et aval) pour les deux sexes. Elle varie également en fonction du sexe, elle est légèrement plus faible chez les femelles que chez les mâles de l'espèce. Les données relatives à la maturation des gonades, au rapport gonadosomatique révèlent que la période de reproduction varie en fonction des conditions hydrologiques et de la saison. Le diamètre de l'ovocyte à la ponte est de 1.8mm; la fécondité relative atteint 31834 ovocytes par kg de poids corporel. Les conditions environnementales qui prévalent dans l'habitat anthropique (lac) étudié, semblent plus favorables à la reproduction de l'espèce que les parties fluviatiles.
Cell-Int: a cell–cell interaction assay to identify native membrane protein interactions
Authors: Aymoz-Bressot Thibaud , Canis Marie , Meurisse Florian , Wijkhuisen Anne , Favier Benoit , Mousseau Guillaume , Dupressoir Anne , Heidmann Thierry , Bacquin Agathe
Published: September 2024

Intercellular protein–protein interactions (PPIs) have pivotal roles in biological functions and diseases. Membrane proteins are therefore a major class of drug targets. However, studying such intercellular PPIs is challenging because of the properties of membrane proteins. Current methods commonly use purified or modified proteins that are not physiologically relevant and hence might mischaracterize interactions occurring in vivo. Here, we describe Cell-Int: a cell interaction assay for studying plasma membrane PPIs. The interaction signal is measured through conjugate formation between two populations of cells each expressing either a ligand or a receptor. In these settings, membrane proteins are in their native environment thus being physiologically relevant. Cell-Int has been applied to the study of diverse protein partners, and enables to investigate the inhibitory potential of blocking antibodies, as well as the retargeting of fusion proteins for therapeutic development. The assay was also validated for screening applications and could serve as a platform for identifying new protein interactors.
Behaviour of Quark and Strange Quark Matter for Higher Dimensional Bianchi Type -I Universe in f(R,T) Gravity
Authors: Thakre S. , Mapari R.V. , Thakare V.A.
Published: September 2024

This research paper delves into a thorough examination of the behaviour exhibited by higher dimensional Bianchi Type-I universes, incorporating the presence of quark and strange quark matter within the framework of f(R,T) gravity. The solutions derived for the field equations encompass both exponential volumetric expansion and power law scenarios. Under the exponential expansion model, both the pressure (pq) and energy density (pq) associated with quark matter are initially finite at the inception of cosmic time, gradually diminishing to zero as time progresses towards infinity. Conversely, within the power law model, these parameters start off infinitely large at t = 0, subsequently decreasing to zero as time approaches infinity. Furthermore, an exploration of the physical and geometrical attributes of the model is conducted. Notably, in power law expansion models, the behaviour of strange quark matter mirrors that of quark matter concerning pressure (p) and energy density (ρ). But in exponential expansion model quark pressure and strange quark pressure behave differently. The bag constant emerges as a critical factor influencing the universe's expansion, with observations revealing that both pressure and energy density tend towards the bag constant at large time scales (t→∞). Specifically, the pressure p→ -BC and the energy density ρ→ BC as time approach infinity. The negative pressure sign denotes the universe's expansion during later epochs.
Two-Dimensional Hydrodynamics as a Class of Special Hamiltonian Systems
Authors: Kulyk Kostyantyn M. , Yanovsky Vladimir V.
Published: September 2024

The paper defines a class of Hamiltonian systems whose phase flows are exact solutions of the two-dimensional hydrodynamics of an incompressible fluid. The properties of this class are considered. An example of a Lagrangian one-dimensional system is given, which after the transition to the Hamiltonian formalism leads to an unsteady flow, that is, to an exact solution of two-dimensional hydrodynamics. The connection between these formalisms is discussed and the Lagrangians that give rise to Lagrangian hydrodynamics are introduced. The obtained results make it possible to obtain accurate solutions, such as phase flows of special Hamiltonian systems.
Thermal and Mass Stratification Effects on MHD Flow Past an Accelerated Vertical Plate with Variable Temperature and Exponential Mass Diffusion Embedded in a Porous Medium
Authors: Sahu Digbash , Deka Rudra Kanta
Published: September 2024

This study looks at how the impacts of thermal and mass stratification on magnetohydrodynamic (MHD) flow alongside a vertically accelerating plate featuring variable temperature and exponential mass diffusion within a porous medium. The Laplace transform technique is utilized to solve the governing equations related to flow, energy, and mass diffusion. Subsequently, the impact of stratification on the flow field, temperature, and mass diffusion is examined. The study indicates that thermal and mass stratification significantly affects the profiles of velocity, temperature, and mass diffusion. Additionally, it has been discovered that a stable state for the velocity is achieved as both stratification parameters are raised, whereas stable states for the temperature and concentration occur when mass stratification is heightened but thermal stratification is reduced.
Thermal Stratification and Chemical Reaction Effects on MHD Flow Through Oscillatory Vertical Plate in a Porous Medium with Temperature Variation and Exponential Mass Diffusion
Authors: Sahu Digbash , Deka Rudra Kanta
Published: September 2024

This research paper investigates the thermal stratification and chemical reaction effects on MHD Flow through oscillatory vertical plate in a porous medium with temperature variation and exponential mass diffusion. Through the application of the Laplace transform method, the paper derives analytical solutions that precisely depict the physical dynamics of the flow. The investigation utilizes sophisticated mathematical models to scrutinize the complex dynamics between Magnetohydrodynamics (MHD) and convective movements, considering a range of conditions involving temperature fluctuations and exponential rates of mass diffusion. A pivotal finding from this research is the detailed comparison between the outcomes of thermal stratification and those observed in environments lacking such stratification. It is observed that the implementation of stratification within the flow leads to a more rapid achievement of equilibrium or steady-state conditions.
Heat and Mass Transport Aspects of Nanofluid Flow towards a Vertical Flat Surface influenced by Electrified Nanoparticles and Electric Reynolds Number
Authors: Pati Aditya Kumar , Mishra Sujit , Misra Ashok , Mishra Saroj Kumar
Published: September 2024

This study examines the heat and mass transfer aspects of the natural convective flow of a nanofluid along a vertical flat surface, incorporating electrified nanoparticles and electric Reynolds number. While conventional nanofluid models like Buongiorno’s model overlook the nanoparticle electrification and electric Reynolds number mechanisms, this study addresses the nanoparticle electrification and electric Reynolds number mechanisms by justifying its relevance, particularly when tribo-electrification results from Brownian motion. This incorporation of the electric Reynold number and nanoparticle electrification mechanism is a unique aspect of this investigation. Using the similarity method and nondimensionalization, the governing partial differential equations of the flow are transformed into a set of locally similar equations. MATLAB's bvp4c solver is employed to solve this set of equations, along with the boundary conditions. The obtained results are validated by comparison with those from previously published works. Graphical representations are provided for the numerical outcomes of non-dimensional velocity, concentration and temperature concerning the nanoparticle electrification parameter and electric Reynolds number. The combined effects of the nanoparticle electrification parameter and the electric Reynolds number on non-dimensional heat and mass transfer coefficients are examined in tabular form. Furthermore, the impact of the nanoparticle electrification parameter on both heat and mass transfer for varying values of the Brownian motion parameter is explored graphically. The primary finding of this investigation indicates that the electrification mechanism of nanoparticles quickens the transfer of heat and mass from a flat surface to nanofluid, suggesting promising prospects for utilization in cooling systems and biomedical applications.
Morphology of the Surface of Silicon Doped with Lutetium
Authors: Daliev Khodjakbar S. , Utamuradova Sharifa B. , Khamdamov Jonibek J. , Bahronkulov Zavkiddin E.
Published: September 2024

In this paper, using a scanning electron microscope (SEM) and atomic analysis, the location map of microcomposites formed on the surface of n-Si, p-Si, n-Si and p-Si samples was studied. Force microscope (AFM) research devices. The atomic fractions of inclusions of carbon, oxygen and lutetium formed on the surface of the samples were studied. Also, using the ASM device, the sizes, relief and topographic appearance of defects formed on the surface of the samples were determined. In silicon samples doped with Lu, a decrease in the size of surface defects and the formation of nano-sized structures were found, which makes it possible to obtain materials with a more perfect crystal structure. Using a ZEISS GeminiSEM 300 scanning electron microscope, the structural structure, chemical composition and images of their arrangement of n-Si, p-Si, n-Si and p-Si samples were obtained. In this case, the electron accelerating voltage was 20 kV, and the pressure in the sample chamber was (10-3 mmHg). Research results show that the structural structure of micro- and nanocomposites formed in silicon mainly depends on the diffusion time and cooling rate of the samples after diffusion annealing.
Structural Features of Silicon with Tin Impurity
Authors: Utamuradova Sharifa B. , Bokiyev Bakhodir B. , Pulatova Dilorom S.
Published: September 2024

In this work, samples of single-crystalline silicon doped with tin were studied using X-ray diffraction and electron microscopy. It has been established that at a scattering angle of 2θ » 36.6° in the X-ray diffraction patterns of n-Si and Si samples, structural reflections (110) of the corresponding SiO2 nanocrystallites with lattice parameters a = b = 0,4936 нм и c = 0,5212 nm and c = 0.5212 nm, belonging to the hexagonal crystal lattice and space group P321. The formation of tin nanocrystallites with sizes of 9.1 and 8 nm in the near-surface regions of the Si matrix crystal lattice was discovered.
CVC Structure of PtSi - Si-M in a Wide Range of Temperatures
Authors: Mamadalimov Abdugafur T. , Isaev Makhmudkhodja Sh. , Atamirzaev Tokhirjon U. , Ernazarov Shamsiddin N. , Karimov Mukhtor K.
Published: September 2024

In this work the mechanism of current flow during illumination with hν≥Eg in the temperature range of 77÷300 K is considered. It is established that in the PtSi – Si-M structure in the temperature range of 77÷270 K the regime of space charge limited currents (SCLC) is realized. The current-voltage characteristics of the structures show areas of linear and quadratic dependences of current on voltage, as well as areas of a sharp increase in current. These features of the current-voltage characteristic are explained by the presence of deep level structures and sticking levels for charge carriers in the base region. From the temperature dependence of the SCLC, the concentration of adhesion levels was determined to be equal to (1.8÷3) 1015 cm-3 and the adhesion factor to be equal to 6.32·10-2. In the temperature range 77÷115 K at voltages 0.2÷1 V, the current-voltage characteristic obeys the law J ~ Un(n=3÷4), and above U – the law J ~ U6, followed by a transition to the quadratic law.
Study of the Thermoelectric Properties of Chrome Silicides
Authors: Mamadalimov Abdugafur T. , Isaev Makhmudkhodja Sh. , Bozarov Ismoil T. , Rajabov Alisher E. , Vakhabova Sojida K.
Published: September 2024

The temperature dependences of the thermoelectromotive force of chromium mono and disilicides in the temperature range 200℃÷+600℃ have been studied. For chromium disilicide, the dependence of the thermopower coefficient (α) on temperature (T) has three sections. Chromium monosilicide is characterized by a smooth increase in thermopower with increasing temperatures up to 200℃, and then its constancy. It was revealed that silicides rich in chromium atoms have lower thermopower values than silicides rich in silicon. The maximum thermo-EMF values of 110 μV/K and 190 μV/K were observed for chromium mono- and disilicides, respectively. It was revealed that for chromium silicides the dependence of the dimensionless parameter Q = Z∙T on temperature is linear. The possibility of predicting the technology of synthesis of semiconductor material with optimal thermoelectric properties using the dependence of thermopower on conductivity and the parameter Q on temperature is shown.
Study of Silicide Formation in Large Diameter Monocrystalline Silicon
Authors: Mamadalimov Abdugafur T. , Isaev Makhmudkhodja Sh. , Mamatkulov Mukhammadsodik N. , Kodirov Sardor R. , Abdurazzokov Jamshidjon T.
Published: September 2024

To study the formation of silicides, dislocation-free ingots of single-crystalline silicon with a diameter of 65÷110 mm, grown by the Czochralski method, were used. When studying such silicon samples using electron microscopy, small-angle scattering of CO2 laser radiation, three types of defects were identified: swirl defects, impurity micro inclusions and impurity clouds. It has been shown that silicide inclusions with sizes of 8-20 μm are formed in the near-surface layer of doped silicon, and they decrease linearly deeper into the crystal. The electrical parameters of semiconductor chromium silicide were determined: resistivity 1800 μOhm·cm, thermopower coefficient 180 μV/k, Hall constant 1.2·10-2 cm3/Kl, hole concentration 6·1019 cm-3, charge carrier mobility 18.6 cm2/V·s, band gap (0.29±0.02) еV.
Electrodifusion of Manganese Atoms in Silicon
Authors: Iliyev Xalmurat M. , Khudoynazarov Zafar B. , Isakov Bobir O. , Madjitov Mirahmat X. , Ganiyev Abduvokhid A.
Published: September 2024

The paper describes the research and study of the process of electrically induced diffusion of Mn atoms in silicon directly from a Si surface layer that was preliminarily enriched with Mn. To ensure the so-called electrically induced diffusion process, a constant electric field was applied to the investigated samples. It has been revealed that as a result of the diffusion of Mn impurity atoms into samples placed at the negative pole of the electrical diffusion unit, the proportion of Mn atoms was 75.4% (relative to silicon atoms), while in samples placed at the positive pole this indicator tended to be 2.7% (relative to silicon atoms). Besides that, for the first time, an experimental increase in the electro-active concentration of Mn impurity atoms in silicon (at T = 900°C) was detected under the influence of an external constant-value electric field. In this case, the maximum solubility of impurity atoms of Mn at a temperature of T = 900°C was NMn~2.27·1014 cm-3, while the average concentration of electro-active Mn atoms diffused into silicon under the influence of an external constant electric field reached NMn*~2.62·1014 cm-3.
Implications of the Presence of Y As a Reactive Element in Cathodic Vacuum ARC TiAlN Protective Coating for Tribological Applications
Authors: Maksakova О.V. , Beresnev V.M. , Lytovchenko S.V. , Čaplovičova M. , Čaplovič L. , Kusý M. , Doshchechkina I.V.
Published: September 2024

The results of studies of the influence of Y as a reactive element on the properties of TiAlN coatings obtained by the method of vacuum-arc deposition are given. Changes in the structure and properties were analyzed using SEM in combination with EDX, XRD, indentation analysis and wear analysis. It is shown that the presence of Y changes the crystalline phase of the Ti0.6Al0.34Y0.06N coating. It consists of a combination of a cubic NaCl structure (basic phase) and a wurtzite structure (additional phase). In addition, it leads to a small grain size (12 nm) and a nano-columnar structure. The high hardness is partly the result of solution hardening due to the inclusion of larger Y atoms in the TiAlN lattice at the locations of the metal atoms. The reduced grain size of 12 nm also helps to increase the hardness of the coating. The hardness is 31 ± 2.5 GPa, the modulus of elasticity is 394.8 ± 35.8 GPa. The residual stress is approximately three times (−3352 ± 64 MPa) higher than the TiAlN coating (−720 MPa). In addition, a high level of compressive stress contributes to an increase in hardness, since defects responsible for their own compressive stress are an obstacle to dislocation movement. The improved hardness of the experimental coating can be explained by a triple effect: solution strengthening, grain grinding and high residual compressive stress. The addition of Y indicates a slower growth of the oxide layer on the surface of the coating during the wear test. After the addition of Y, Y ions preferentially separate at the grain boundaries and therefore effectively delay the inward diffusion of oxygen. The addition of Y promotes the formation of dense Al2O3, which is effective in restraining diffusion and therefore protects the coating from oxidative wear.
Vibrational Frequencies of Phosphorus Trichloride with the Vibrational Hamiltonian
Authors: Vijayasekhar J. , Lavanya K. , Phani Kumari M.V.
Published: September 2024

This study presents an approach for precisely determining the stretching vibrational frequencies of the P-Cl bond in phosphorus trichloride (PCl3) using a vibrational Hamiltonian framework that maintains the C3v symmetry point group. Our methodology enables the accurate prediction of vibrational frequencies up to the fifth overtone. It identifies related combination bands, marking a significant advancement in vibrational spectroscopy and molecular modelling. By enhancing the accuracy and depth of our understanding of molecular vibrations, this research paves the way for developing more sophisticated computational models, thereby significantly improving the precision of chemical analyses, and contributing to the broader field of chemical physics.
Enhancing Third-Generation Solar Cell Efficiency and Stability Through P-Type Silicon Integration: Process Analysis and Performance Evaluation
Authors: Srivastava Santosh Kumar , Singh Jitendra
Published: September 2024

Third-generation solar cells have emerged as a potential solution to the effectiveness and stability issues encountered in conventional solar technology. This study focuses on the characteristics of copper-zinc-tin-sulfide (CZTS) thin films inside this innovative architectural framework, which is an important step toward improving third-generation solar cells by incorporating a p-type silicon layer. This integrated method provides a versatile and manageable setting for film deposition, underscoring the effort put into creating high-quality CZTS thin films. Using X-ray diffraction (XRD), the study assessed the structural change of CZTS films after annealing, finding that kesterite phases were dominant. Images captured by a scanning electron microscope (SEM) reveal the microstructure and surface morphology of CZTS-coated Silicon nanowires (Si-NWs). A detailed analysis of the current-voltage characteristics provides evidence of the operational potential of the Si-NWs-CZTS coated solar cell. Significant performance parameters observed include a Voc value of 0.45 ± 0.02V, Isc value of 8.25 ± 0.30 mA/cm², FF value of 24 ± 2%, and η value of 1.0 ± 0.1%. The encouraging results indicate the capacity of using P-type silicon to enhance the performance of third-generation solar cells.
Multiband Asymmetric Biconical Dipole Antenna with Distributed Surface Impedance and Arbitrary Excitation
Authors: Nesterenko Mikhail V. , Katrich Victor A. , Pshenichnaya Svetlana V.
Published: September 2024

A numerical-analytical solution of a problem concerning the current distribution and input characteristics of asymmetric biconical dipole with distributed surface impedance and arbitrary excitation and derived in the thin-wire approximation. Solution correctness is confirmed by satisfactory agreement of numerical and experimental results from literary sources. Numerical results are given for the input characteristics of the dipole in the case of its asymmetric excitation by a point source.
THE IMPACT OF ARTIFICIAL INTELLIGENCE IN ENHANCING LEAN MANAGEMENT: AN EXPLORATORY STUDY IN THE GENERAL AUTOMOTIVE AND EQUIPMENT COMPANY
Authors: Majeed Basima Abbood , Frikha Ahmed
Published: September 2024

Objective: The aim of the study is limited to several points, the most important of which is to understand the new concepts related to artificial intelligence and their role in supporting and activating lean management and the extent of their contribution to the success and survival of modern industrial companies.
 
Theoretical Framework: This topic presents the most important concepts and theories on which the research is based. [Artificial Intelligence and Lean] stands out, providing a solid foundation for understanding the context of the investigation.
 
Method: The study population was represented by the factories affiliated with the General Company for Automotive and Equipment Manufacturing. The sample was selected randomly, based on the (simple random sampling) method, where 3 factories were selected (the car and specialized wheel production factory, the body and heavy equipment factory, and the battery factory) out of a total of 6, and the number was Study population (2736) The researcher decided to distribute (300) questionnaires to workers in the factories affiliated with the company, the study sample. (300) questionnaires were distributed to the research sample (10.96%) of them after reviewing previous studies and benefiting from them in the field of research. (289) were recovered at a rate of (96.3%), of which (9) were not suitable for analysis, so the net sample was 278 from the studied population, at a rate of (92.8%) from the research sample.
 
Results and Discussion: The study showed a set of theoretical and field conclusions, the most important of which is that artificial intelligence has gained high acceptance among the staff of the automobile and equipment manufacturing company as a tool for improving administrative work and enhancing the characteristics of lean management.
 
Research Implications: The practical and theoretical implications of this research are discussed, providing insight into how the findings can be applied or impact practices in the field of AI and lean management and these impacts may include companies affiliated with the Ministry of Industry and Minerals and the services they provide.
 
Originality/Value: The importance of this study came from the scarcity of studies that attempted to identify and understand the nature of the relationship between variables (artificial intelligence and lean management), as well as the attempt of the current study to address a realistic problematic problem that directly affects the performance of workers in the general automotive and equipment industry.
Nursing Experience of Early Application of Nasoenteric Tube for Enteral Nutrition in Critically Ill ICU Patients
Authors: Xin Jingjing , Song Jingfei , Wang Jing
Published: September 2024

Objective: To investigate the effective nursing measures of early application of nasoenteric tube for enteral nutrition in critically ill patients in ICU, and to summarize the nursing experience. Methods: The study was carried out in June 2023–November 2023. 62 samples of ICU critically ill patients were selected, all of whom used enteral nutrition by mesenteric tube and were grouped into an observation group (n = 31) and a control group (n = 31) by using the numerical table randomization method. The patients in the control group were basic nursing interventions, and the patients in the observation group were comprehensive quality care, comparing the nutritional indexes, complication rates, and nursing satisfaction between the two groups. Results: All nutritional indicators of the observation group were higher than those of the control group after nursing intervention (P < 0.05); the complication rate of the observation group was lower than that of the control group (P < 0.05); the nursing satisfaction of the observation group was higher than that of the control group (P < 0.05). Conclusion: Comprehensive quality nursing care during the early application of a gastroenteric tube for enteral nutrition in critically ill patients in the ICU can improve nutritional indexes, reduce the incidence of complications and improve nursing satisfaction.
New Media-Based Environmental Campaign: Sekumpul Waste Bank (Sekumpul Bank Sampah) in Empowering the Community’s Ecomony
Authors: Alif Muhammad , Astuty Sri , Hanief Lalita
Published: September 2024

Department of Public Housing, Residential Areas and the Environment (DPRKPLH) Banjar Regency (2022) the amount of waste entering final disposal sites reached 290 tons per day, an increase of 60 tons compared to the previous year. The Sekumpul Waste Bank in Banjar Regency actively carries out environmental campaigns via social media Instagram about Reuse, Reduce and Recycle. The aim of this research is to analyze new media-based environmental campaigns for community economic empowerment at the Sekumpul waste bank. The method used in this research is a descriptive qualitative approach. Data collection techniques were interviews, literature studies and documentation with a total of 2 informants. The data analysis technique uses Manual Data Analysis Procedure (MDAP), namely daily notes, transcripts, coding, categories, themes and memos. The results show that the Sekumpul Waste Bank campaigns for waste management through Instagram posts, holding events and providing material on local radio broadcasts. It is hoped that this environmental campaign can increase community participation in managing waste wisely and with economic value.