bluuebunny/crossref_metadata_2025 huggingface dataset:
Sample preparation and data collection for Serial Block Face Scanning Electron Microscopy of Mammalian Cell Monolayers v1
Authors: Antao Noelle
Published: October 2023

Serial block face scanning electron microscopy (SBF-SEM) is volume EM technique used to study biological samples including tissue and cellular samples. Here we describe detailed protocols for two sample embedding methods for in vitro tissue culture cells intended to be studied using SBF-SEM. The first protocol focuses on cell pellet embedding and the second on en face embedding. En face embedding can be combined with light microscopy, and this CLEM workflow can be used to identify specific biological events in a light microscope, which can then be imaged using SBF-SEM. We systematically outline the steps necessary to fix, stain, embed and image adherent tissue culture cell monolayers by SBF-SEM. Users experienced with electron microscopy sample preparation methodology will be able to complete this protocol in 10-11 days from initial seeding of cells in tissue culture to image acquisition.
Polysomnography v1
Authors: Peñuelas Núria
Published: October 2023

Polysomnography in mice
Comparative analysis of Actinobacteria phage-plasmids and their transduction potential
Authors: Nikulin N.A. , Kiselev S.S. , Panyukov V.V. , Lu Y. , Zimin A.A.
Published: October 2023

The genus Streptomyces is the most extensively studied group within actinobacteria, which are widely used for the production of antibiotics and other metabolites. Streptomyces bacteriophages attract a lot of interest to study phage-host coevolution. One of the probable interactions is a bacteriophage-mediated horizontal transfer of genes encoding bacterial metabolites, which are important for humans. In this study, a search for Streptomyces bacteriophages having capacities necessary for efficient horizontal transfer was performed. Groups of bacteriophages of actinobacteria and their plasmids with relatively long GC-rich sequences containing both genes related to viral morphogenesis and plasmid-associated genes were revealed by comparative genome analysis. In one of these groups, homologs of proteins of DNA packaging into a capsid of Punavirus genus phages, that representatives are capable to perform a horizontal transfer of genes with high frequency were identified. Taking it into account, as well as the peculiarities of their genomic structure, horizontal gene transfer by this group of viruses and plasmids was assumed to occur. Considering the genome length and GC-content, it is thought that these viruses could be useful for producers construction. Moreover, some given examples showing the chimerical origin of phage-plasmids allow suggesting that recombination events between considered phages-plasmids occur at high frequency. New representatives of viruses with low similarity to known phage genomes were also detected among plasmids. A wide diversity of actinobacterial phage-plasmids that is related to their variability and a probable existence of a great number of sequences of this type of viruses in databases were found out.
Women and the Federation of Disability Organizations in Malawi: Experiences of Struggle and Solidarity
Authors: Huque Sarah
Published: October 2023

Women with disabilities are among the most marginalised members of the Federation of Disability Organizations in Malawi (FEDOMA), facing particular challenges related to sexual and gender‐based violence and family/home life; women with disabilities are both abused because of their embodied womanhood and denied many socially‐valued “traditional women’s roles.” However, women within Malawi’s disability rights movement transgress the boundaries of these social restraints. In this article, I share stories of women disability activists, drawn from an interview and participant observation‐based project, co‐designed with FEDOMA to explore the experiences of grassroots activists. In telling their stories, the women of FEDOMA detailed processes of empowerment and change, combatting their own and others’ experiences of violence, abuse, and exclusion. I discuss the ways in which women activists embodied roles that altered their communities and built activist networks, supporting one another in expressing agency, strength, and solidarity. Their work highlights a politics of care that emphasises the “traditional” and the “modern,” incorporating individualised human rights discourse into an ethics of community caring and expanding this collective inclusion to the oppressed and marginalised. In focusing on the experiences of Malawi’s women disability activists, we gain a more complex understanding of mechanisms of marginalisation, resistance, and empowerment.
Qualitative Tests for Preliminary Phytochemical Screening and Antihelmintic Activity of Root Extract of Crossandra infundibuliformis
Authors: Vasantha Galanki , Roy N Sharmila , Yashodha Adari , Bhargavi Danabala , Shaik Sadeah Anjum
Published: October 2023

Crossandra infundibuliformis is native to South India and Srilanka. It is a traditional plant having beneficial activities with fewer side effects. The promising effects of the plant includes Anticancer, Antibacterial, Antifungal, Antihelmintic, insecticidal, wound healing properties etc. The active constituents of the plant are alkaloids, flavonoids, phytosterols, and phenolic compounds. In the present study, the root extract was evaluated for antihelmintic activity and the plant showed promising effect at 200mg/kg. Initial phytochemical screening was also done in ethanol, chloroform and acetone extracts. The major constituents in all the three extracts are alkaloids, flavonoids and tannins.
OCR Using Python and Its Application
Authors: Mukherjee Sumita , Tyagi Hritik , Tyagi Purushautam , Singh Nikita , Bhardwaj Shraddha
Published: October 2023

Optical Character Recognition (OCR) of papers has tremendous practical value given the prevalence of handwritten documents in human exchanges. A discipline known as optical character recognition makes it possible to convert many kinds of texts or photos into editable, searchable, and analysable data. In the past ten years, academics have developed systems that automatically evaluate printed and handwritten documents to convert them to electronic format. In the modern era, as demand for computer systems arose, the demand to convert paper text and computer vision also erose. To interact the computer with capability to read text from images, videos and images have been arose rapidly and many software companies came in role to fulfil this need. One of the active and difficult study areas in the world of pattern recognition and image processing has been handwriting recognition. Among its many uses are bank checks, reading assistance for the blind, and the conversion of any handwritten document into structural text. The main aim of this paper is to create a searchable pdf from the image and bring the application to easy use and deployable on premises and cloud.
Abraham Maslow’s Notion of Self- Actualization in Philip Roth’s American Pastoral
Authors: Verma Manvi , Kaur Sukhvinder
Published: October 2023

This article makes the argument more specifically on the humanistic psychology; a vibrant movement of the late 1950s; emphasizing the qualities, growth, need, creativity, and motivation of an individual. Philip Roth’s American Pastoral was an American classic, a novel of

American culture. It is not only a biography, but an intensive interpretation of the fall of American dream. The author demonstrates the American Pastoral from the humanistic point of view. This paper attempts to analyse the humanistic attitudes and values in the novel American Pastoral. The process from the basic to the being needs in the novel is being critically expressed within the framework of the humanistic psychology.
Primary Ovarian Insufficiency: Current Understanding and Diagnostic Approaches
Authors: R Priya , Bhaskaran K. , A Suresh , Muninathan N , V Gopikrishnan , S Deepthi , RK Aswathi , V Surekha , D Dinesh Roy
Published: October 2023

Primary ovarian insufficiency (POI) is a medical condition where ovarian function stops prematurely, typically before the age of 40. This condition leads to infertility and produces symptoms similar to those experienced during menopause. Although the origins of POIs are diverse, genetic elements substantially influence their emergence. This assessment delves into the genetic facets of POI, covering genetic triggers, detection, and genetic consultation. We scrutinize the genes linked to POI and their function in ovarian activity, as well as the genetic deviations and mutations that foster POI onset. We also examine the challenges and limitations of genetic testing and counseling for POI and suggest ways to address these challenges. This review offers a thorough examination of the existing understanding of the genetic factors linked to Primary Ovarian Insufficiency (POI) emphasizing the critical need for further investigation in this field.
Phytomolecules to Improve Skin Health: A polyherbal Emulgel Formulation
Authors: Singh Adity , Srivastav Nidhi
Published: October 2023

Due to its ability to combine the advantages of several herbal extracts with emulsion-based delivery technologies, polyherbal emulgel compositions have attracted a lot of attention in the cosmetics sector. The creation and assessment of polyherbal emulgels for skincare applications are explored in this work. The effective blending of diverse herbal extracts to combat certain skin issues including acne, inflammation, and ageing is one of the key breakthroughs. The regulated and sustained release of active ingredients by the emulgels suggested possible long-lasting benefits and enhanced skin penetration. The sensory assessment of polyherbal emulgels indicated excellent consumer approval, making them potential candidates for commercialization. The study also emphasised the significance of standardization and quality control to guarantee dependable and consistent product performance. The research advances herbal emulgel compositions and their potential to provide individualized and successful skincare treatments.
Artificial Intelligence-Based Machine and Deep Learning Techniques That Use Brain Waves to Detect Depression
Authors: Jaleel Uruj , Gupta Parbhat , Gupta Parbhat , Gupta Praveen Kumar , Bharti Sandeep , Sehrawat Jyoti , Singh Ajit
Published: October 2023

Electroencephalogram (EEG) lsignal-based lemotion lrecognition lhas lattracted lwide linterests in lrecent lyears land lhas lbeen lbroadly ladopted in lmedical, laffective lcomputing, land lother lrelevant lfields. Depression has lbecome la lleading lmental ldisorder lworldwide. Evidence lhas lshown lthat lsubjects lwith ldepression lexhibit ldifferent lspatial lresponses in lneurophysiologic lsignals lfrom lthe lhealthy lcontrols lwhen lthey lare lexposed lto lpositive land lnegative. Depression isla common lreason lfor an increase in lsuicide lcases lworldwide. EEG lplays an important lrole in lE-healthcare lsystems, lespecially in lthe lmental lhealthcare larea, lwhere lconstant land lunobtrusive lmonitoring lis ldesirable. EEG lsignals lcan lreflect lactivities lof lthe lhuman lbrain land lrepresent different lemotional lstates. Mental lstress lhas lbecome la lsocial lissue land lcould lbecome la lcause lof lfunctional ldisability lduring lroutine lwork. This lResearch presents ldeep llearning ltechnique lfor ldetecting ldepression lusing lEEG. The lalgorithm lfirst lextracts lfeatures lfrom lEEG lsignals land lclassifies lemotions lusing lmachine land ldeep llearning ltechniques, in lwhich ldifferent lparts lof la ltrial lare lused lto ltrain lthe lproposed lmodel land lassess lits limpact lon lemotion lrecognition lresults. The simulation is performed lusing lthe lPython lspyder lsoftware. The lprecision lof lthe lproposed lwork lis l99% lwhile in lthe lprevious lwork lit lis l91.00%. lSimilarly lthe lother lparameters llike lRecall land lF_Measure lis l94% land l97% lby lthe lproposed lwork land l88.00% land l89.00% lby lthe lprevious lwork. The loverall laccuracy lachieved lby lthe lproposed lwork lis l96.48% lwhile lprevious lit lis lachieved l91.00%. The error rate of proposed technique is l3.52% lwhile l9.008% in existing lwork. Therefore, lit lis clear lfrom lthe lsimulation lresults; lthe lproposed lwork lis lachieved significant lbetter lresults lthan lexisting lwork.
Competición de robótica submarina máster MIR: experiencia educacional
Authors: López Barajas Salvador , Fornas Sergio , Solís Alejandro , Marín Raúl , Vincent Hugel , Pedro J. Sanz
Published: October 2023

En este artículo se describe la nueva competición de robótica submarina del Máster Europeo “Erasmus Mundus MIR” (Marine & Maritime Intelligent Robotics), la cual se ha iniciado en el año 2023 en dos fases. La primera fase incluye pruebas de los algoritmos en simulación, utilizando una aproximación a gemelo digital del robot BlueROV, permitiendo adquirir las imágenes del vehículo, así como mover los motores del mismo, a través del protocolo ROS (Robot Operating System). La segunda fase consiste en la adaptación y validación de los algoritmos anteriores al escenario con robots reales en el CIRTESU (Centro de Investigación en Robótica y Tecnología Subacuática) de la Universidad Jaume I de Castellón. Los estudiantes han empezado a programar el simulador durante el primer semestre, en la Universidad de Toulon, recibiendo la asistencia necesaria para el uso y programación del gemelo digital a través de ROS. Las pruebas incluyen la navegación autónoma del robot a una estación base, la navegación, y la búsqueda de objetos específicos en el fondo de un tanque de agua a través de visión por computador.
Aprendizaje en el ámbito de la introducción a la robótica móvil: experiencia en la competición ASTI Robotics Challenge
Authors: Marqués Josep , Marín Josep , de Diego Miguel , Arbona Álvaro , Muñoz Jairo , Rogalskyy Edgar , Monteagut Pau , Martí José Vicente , Marín Raúl , Cervera Enric , Morales Antonio , Sanz Pedro J.
Published: October 2023

En este artículo se presenta el itinerario seguido por un equipo de estudiantes iniciados en competiciones robóticas tales como “First Lego League” y “Robocup Junior”, habiendo competido a nivel nacional desde el punto de vista universitario, en las competiciones CEABOT y ASTI Robotics Challenge. Con esta experiencia, se presenta el robot desarrollado por el equipo en la competición ASTI 2023, habiendo ganado el primer premio, dando detalles del diseño mecatrónico y la organización del equipo. También, el artículo presenta una valoración de las lecciones aprendidas en cuanto a las bondades de estas competiciones de cara a complementar los estudios universitarios del ámbito de las ingenierías. En general, los estudiantes han experimentado una gran mejora en cuanto a habilidades técnicas, sociales y de motivación, siendo positivo para su desarrollo educativo como futuros ingenieros.
Creación de ejercicios con corrección automática con MATLAB Grader para asignaturas de control automático
Authors: Tejado Inés , Nuevo-Gallardo Cristina , Pérez Hernández Emiliano
Published: October 2023

Recientemente, el desarrollo de recursos interactivos está recibiendo gran atención en titulaciones de ingeniería para apoyar la enseñanza, especialmente tras la pandemia derivada por el coronavirus. Entre estos recursos, los que tienen la capacidad de corrección y/o calificación automática son los preferidos tanto por los estudiantes como el profesorado. Asimismo, la implementación de una evaluación formativa eficaz es uno de los principales retos de los docentes para mejorar realmente el proceso de enseñanza aprendizaje. Este trabajo presenta un ejemplo de aplicación de MATLAB® Grader , una herramienta de autor basada en web que permite a los instructores proporcionar una evaluación automática de diferentes tipos de problemas de ingeniería, no solo los clásicos ejercicios de programación, y, en consecuencia, informar a los estudiantes sobre su rendimiento de una manera rápida y eficaz. En concreto, se presentan una serie de problemas de diseño clásicos de control automático con fines ilustrativos.
Método para la mejora de la comprensión basado en el aprendizaje activo. Un caso de estudio en la ingeniería de control
Authors: Velazquez-Medina Sergio , Cabrera Pedro
Published: October 2023

En muchas ocasiones se detectan dificultades en los estudiantes para la adquisición de ciertas competencias específicas en una materia determinada. Una de las estrategias para optimizar la adquisición de los conocimientos y mejorar los resultados de aprendizaje de los estudiantes en una temática específica es utilizar el proceso de aprendizaje activo. En el presente estudio se desarrolla y aplica un método basado en el aprendizaje activo, utilizando para ello el trabajo autónomo y colaborativo. La experiencia se lleva a cabo en una asignatura del área de ingeniería de sistemas y automática en la universidad de las Palmas de Gran Canaria (España). Se seleccionaron diferentes temáticas específicas de la asignatura que históricamente presentaban dificultad para los estudiantes, estas fueron trabajadas de forma activa por los mismos y se valoró la mejora obtenida en el rendimiento de estos. Para ello se utilizó el t-test y el estadístico p-valor. Se comprobó que el 100% de los estudiantes que presentaban en general cierta dificultad con la asignatura obtuvieron, en la temática específica que estos trabajaron de forma activa, unos resultados relativos superiores a sus propios resultados globales en la misma.
Reparto frecuencial de la realimentación en estructuras en cascada: aplicación al control robusto de un servomotor
Authors: Gil-Martínez Montserrat , Rico-Azagra Javier , Nájera S.
Published: October 2023

Una de las principales ventajas de las arquitecturas de control en cascada es dotar al sistema de control de una mayor rapidez de respuesta ante perturbaciones en el lazo interno, lo cual puede desembocar en un ancho de banda de control excesivo. La arquitectura de control y el método de diseño que se presentan en este trabajo ponen el foco en usar la cantidad de realimentación estrictamente necesaria en cada frecuencia para garantizar las especificaciones robustas de seguimiento y/o rechazo que se estipulen. Después, es de vital importancia cómo distribuir dicha realimentación entre los lazos, interno y externo. En el presente trabajo se resuelve un problema concreto, el control de la posición de un servomotor donde es también accesible su velocidad. Se ilustra cómo la frecuencia de conmutación entre lazos afecta notablemente a la amplificación de ruidos de medición, lo que puede evitar una posible saturación del actuador. La arquitectura de control emplea dos controladores de realimentación y uno de prealimentación. Los diseños se realizan de acuerdo a la Teoría de Realimentación Cuantitativa (QFT), siendo por tanto robustos. El entorno de trabajo permite incorporar cualquier tipo de especificación y facilita el diseño iterativo de ambos lazos, así como sopesar la complejidad de los controladores y su ancho de banda.
Some Physical and Physicochemical Characteristics of Local Karakılçık Wheat Varieties Grown in Different Provinces of Türkiye
Authors: Özkan Kübranur , Gül Hülya
Published: October 2023

Türkiye, one of the first places where wheat was cultivated, is the gene source of ancient wheat varieties that have attracted great interest in recent years. In this study, Karakılçık wheat varieties (KWV) grown by local producers in different provinces of Türkiye for the production of "Karakılçık Bread" were collected. Some physical (foreign matter, hectoliter and thousand kernel weight, grain hardness, kernel size distribution and homojenity, and colour) and physicochemical (wet and dry gluten, gluten index, falling number, zeleny sedimentation, and delayed sedimentation) characteristics of these KWV were determined and compared with a modern bread wheat variety (MBWV). The hectoliter and thousand kernel weights of KWV varied between 26.0-44.74 g and 60.43-70.80 kg hl-1, respectively. It was determined that the KWV of İzmir, Çanakkale, and Konya provinces had the largest and most homogeneous grain structure, while the Antalya KWV had the lightest and the Samsun KWV had the darkest grain color. The highest wet and dry gluten values were measured in the KWV of Antalya province, followed by MBWV and Konya province KWV. Significant differences were determined between MBW and KWV in terms of sedimentation and delayed sedimentation values (p
Application of macros for automated performance of the same type operations when simulating SIW-based slotted waveguide antennas in Ansys HFSS CAD
Authors: Migalin M. M. , Koshkid'ko V. G. , Demshevsky V. V.
Published: October 2023

SIW slotted waveguide antennas contain numerous equidistantly spaced vias and many slots distributed following a particular field distribution. Ansys HFSS CAD user must manually repeat the same type of operations when creating slots or vias. Automating these routine operations is advisable to eliminate design errors and speed up model construction. This paper aims at complete automation of SIW resonant slotted waveguide antenna arrays modelling in CAD Ansys HFSS, including model construction, running simulations and displaying simulation results. There are multiple procedures for slotted waveguide antenna synthesis. For small waveguide antenna arrays with a number of elements less than 15, the internal and external slots coupling consideration is beneficial, while for large waveguide antennas, no mutual coupling assumption can be made (so-called “energy method”). The energy method has been used to determine the coordinates of the longitudinal slots on the broad wall of the SIW based on a given side lobe level. The slot resonant length has been determined using substrate permittivity and operating frequency. The number of slots has been obtained based on the required half-power beamwidth. SIW dimensions have been calculated using the given operating frequency and the dimensions of the filled rectangular waveguide. An IronPython script has been developed to automate the antenna's model construction, automatic simulation and determination of its characteristics. All script commands have been taken from the “HFSS Scripting Guide” document integrated into Ansys HFSS. The tangible outcome of this work is the development of the IronPython script for fully automated modelling of SIW resonant slotted waveguide antennas. The script builds an antenna model from scratch based on a given antenna characteristics, assigns excitation port and radiation boundary conditions, and displays the simulation results – a radiation pattern at a fixed frequency. The script significantly reduces the antenna design time by eliminating the need to repeat the object creation operations.
Influence of a saltwater film on a radio-transparent dome on the amplitude-phase distribution of a millimeter-range antenna
Authors: Zvezdina M. Yu. , Shaposhnikova A. M. , Shokova Yu. A.
Published: October 2023

Transition of communication systems installed on naval ships to the millimeter range requires an analysis of the effect of the saltwater film formed on the radio-transparent dome (RTD) on the radiotechnical characteristics of the mirror antenna. The latter are determined by the amplitude-phase distribution in the antenna aperture, so the topic of research is relevant. The objective of the article is to analyze the effect of the salt-water film on the surface of a marine mounted RTD, as well as the effect of millimeter wavelength antenna placement inside the RTD on the distortion of the field generated in the outer region. It has been shown that when installing millimeter-wave range antennas on a naval ship under a radio-transparent dome it is necessary to consider the distortions introduced by the water film on the dome surface into the generated amplitude-phase distribution when calculating the radio technical characteristics. We do so because most of the known methods for calculating the directivity characteristics of mirror antennas are based on the known amplitude-phase distribution in the antenna aperture. In the paper, the influence of the spherical dome wall and the saltwater film on the amplitude-phase distribution is taken into account as follows. Distortions in the amplitude distribution are caused by energy losses of the electromagnetic wave due to the passage of the curved dielectric wall at different angles. Phase distribution losses are due to the phase shift from the original phase as the dome wall is passed through at different angles. The angles of radio wave entry into the dome wall depend on the location of the antenna inside the radio-transparent dome. The electrical parameters of the saltwater film are determined using the well-known ITU methodology, while its thickness is found using the Gibbs formula, assuming that sea spray is similar to the intensity of drizzle rain. The studies have been conducted for the highest stiffness mode. Studies for a single-mirror antenna with a parabolic reflector 5.4 m in diameter and a radio-transparent dome 18 m in diameter showed that the water film influence is manifested in the phase front distortion, as well as a symmetry violation of the generated amplitude distribution. The degree of water salinity is manifested mainly in the distortion of the phase distribution. This is due to the fact that the electrical parameters of salt and fresh water do not differ much. The detected distortions are stronger for the horizontally polarized waves and in the case when the antenna swing center is offset with respect to the dome symmetry line. The detected patterns allow to give a scientific justification for the choice of the amplitude-phase distribution of the mirror antenna when installing it inside the RTD on the naval ship.
Analysis of technological gaps impact on radar cross-section of a collapsible corner reflector
Authors: Chemaev K. P. , Mozharov E. O. , Komissarova E. V. , Lyulyukin K. V.
Published: October 2023

Corner reflectors used for calibration of radar stations, despite their apparent simplicity, have a number of disadvantages that manifest themselves both in the design and in their manufacture and operation. One of the main disadvantages is that in order to achieve high values of the radar cross-section (RCS), corner reflectors must have large linear dimensions. In addition, to ensure reliable electrical contact, their designs are usually non-separable. All of the above together complicates their operation and transportation, due to the large dimensions and weight of the products. The aim of the article is to develop and investigate by strict electrodynamic methods a corner reflector of a collapsible lightweight design, as well as to evaluate the influence of design features on RCS. The paper presents the results of modeling corner reflectors of a prefabricated structure by strict electrodynamic methods and investigates the influence of design features on its RCS. In particular, the influence of gaps at the top and between the edges of the reflector has been analyzed, the limits of the permissible sizes of these defects have been determined. Based on the results of the study, a lightweight collapsible layout of a corner reflector with square faces has been developed and manufactured. The correspondence of the RCS of the manufactured corner reflector layout to the calculated values has been experimentally confirmed. The performed studies have shown the practical feasibility of lightweight corner reflectors of collapsible design and confirmed the possibility of their use in radar system testing. Information about the impact of defects in the manufacture of corner reflectors on their RCS enables developers to use simpler and cheaper technological and design solutions in the development of corner reflectors.
Nonstationary plane wave incidence on the perfectly conducting structures. Part 1. Diffraction of a nonstationary plane wave on the perfectly conducting cylinder
Authors: Kuzikova N. I.
Published: October 2023

The paper considers the incidence of a nonstationary plane wave on a perfectly conducting cylinder. To find the current on the surface of the cylinder, the well-known solution of the problem in the frequency domain has been used and the transition from the real frequency to a complex variable has been performed. Expressions for calculating the current on the sphere have been obtained using the residue formula. Graphs of the current have been plotted, which make it possible to observe its changes during the propagation of the incident wave. You can specify the following time intervals, differing in current distribution. At 0 < t < a/c, the current on the illuminated part of the surface is close to the current determined in the geometrical optics approximation. In this case, there is naturally no current in the shadow region. For a/c < t < a/c + π/2a/c, a diffraction current appears in the shadow region, which turns out to be small compared to the current in the illuminated region. In the a/c + π/2a/c < t < a/c + πa/c, the current distribution on the cylinder surface rapidly approaches the steady-state distribution. In the steady state, the magnitude of the current is equal to the intensity of the magnetic field of the incident wave. At t > a/c + πa/c, the current practically does not change, and the steady-state distribution is preserved.
Coherent information accumulation from virtual MIMO radars with multiple increase of interelement distances in the real MIMO radar
Authors: Slukin G. P. , Chapursky V. V. , Vodolazov A. V. , Loskutov V. Yu.
Published: October 2023

To reduce the number of air carriers when using MIMO radars, it is advisable to reduce the number of transmitting and receiving elements (TLE and RTE) of real MIMO radars, as well as the use of virtual MIMO radars. The reduction in the number of TLE and RTE can be achieved by increasing the distances between them to values significantly exceeding the average radiation wavelength. In this case, it is necessary to theoretically estimate the spatial resolution and accuracy of the measured coordinates in the selected system of virtual MIMO radars corresponding to real MIMO radars with spatially highly rarefied TLE and RTE. For short-range MIMO radars, using theoretical expressions for the generalized uncertainty function (GUF) in the case of a fixed point target, two-dimensional and one-dimensional sections of GUF in the “range–azimuth” plane are determined, which are compared for variants of moderate and highly rarefied two-dimensional arrangements of TLE and RTE of real and virtual MIMO antennas. The proposed mathematical technique allows you to quickly evaluate the resolution in range and azimuth in the development and creation of real and virtual MIMO radars with increased inter-element distances.
Structural carbon fiber plastics as a promising material for radio-absorbing materials creation
Authors: Bakina L. I. , Golubev A. N. , Zefirov V. L.
Published: October 2023

Radio-absorbing materials (RAM) are widely used in the radio industry and instrumentation when creating anechoic chambers, loads, absorbers in waveguide and other microwave devices, to reduce the radar visibility of products and objects of military equipment, to combat “parasitic” connections between blocks and components of RF blocks, to protect personnel from microwave radiation. RAMs based on polymer binder and special fillers have found the most widespread application for solving these problems, but such materials are not capable of carrying structural loads. One of the likely solutions to this problem may be the use of carbon fiber plastics produced in large quantities by the domestic industry.
Nonstationary plane wave incidence on the perfectly conducting structures. Part 2. Diffraction of a nonstationary plane wave on the perfectly conducting sphere
Authors: Kuzikova N. I.
Published: October 2023

The paper considers the incidence of a nonstationary plane wave on a perfectly conducting sphere. To find the current on the surface of the sphere, the well-known solution of the problem in the frequency domain has been used and the transition from the real frequency to the complex variable has been performed. Expressions for calculating the current on the sphere have been obtained using the residue formula. Graphs and vector images of the current have been plotted, which make it possible to observe its changes during the propagation of the incident wave. You can specify the following time intervals, differing in current distribution. At 0 < t < a/c, the current on the illuminated part of the sphere is close to the current determined in the geometrical optics approximation. In this case, there is naturally no current in the shadow region. For a/c < t < a/c + (π/2)a/c, a diffraction current appears in the shadow region, which turns out to be small compared to the current in the illuminated region. In the a/c + (π/2)a/c < t < a/c + πa/c, the current distribution on the sphere surface rapidly approaches the steady-state distribution. In the steady state, the streamlines represent circles obtained by sectioning the sphere with planes orthogonal to the magnetic field of the incident wave. At t > a/c + πa/c, the current practically does not change, and the steady-state distribution is preserved.
General method for ensuring the electromagnetic compatibility of radio-electronic equipment located on the top platforms of towers or masts, when adding new radio-electronic equipment using metamaterial screens
Authors: Buzova M. A. , Shlyakhov A. V.
Published: October 2023

When placing a newly introduced antenna-feeder device (AFD) on the upper platforms of towers or masts, the electromagnetic situation at the facility as a whole changes significantly. At the same time, traditional means of ensuring the electromagnetic compatibility (EMC) of radio electronic equipment (REE) may not be enough. Therefore, an urgent task is to develop methods for providing EMC of REE of such systems. The aim of the article is to develop and numerically implement a methodology for providing EMC of REE located on the upper platforms of towers or masts, when adding a new REE using electromagnetic shields based on a metamaterial. The numerically obtained results of optimizing the placement of the newly introduced AFD and the metamaterial screen on the upper platform of a typical tower showed the effectiveness and efficiency of the proposed technique. The proposed method for providing EMC of REE can be used to select the optimal location of the newly introduced AFD on the upper platforms of towers or masts in terms of providing EMC of REE.
Development features of small-sized phased antenna arrays of millimeter wave band
Authors: Manaenkov E. V.
Published: October 2023

Recently, a need has arisen for small-sized Ka-band phased antenna arrays (PAA) with electric beam scanning. In the development and study of phased arrays with small apertures not exceeding several tens of wavelengths, significant limitations were found on the accuracy of beam setting accuracy when its scanning in a wide angular sector. This leads to an increase in direction finding errors when using such phased arrays as part of small-sized monopulse radars for target tracking. The aim of the article is to investigate the causes of occurrence of various factors that affect the accuracy of the beam setting accuracy in the feedthrough phased arrays with spatial excitation by monopulse feeds, and also to note ways to eliminate or minimize this effect. The analysis of the main factors affecting the accuracy of the beam setting accuracy in the phased arrays, associated with the control algorithms of the phase shifters of the phased arrays, caused by the peculiarities of the circuitry implementation of the beam handling system of the phased arrays, and also having an electrodynamic nature and taking into account the excitation of the receiving antenna array by a monopulse feed, the mutual influence of emitters and edge effects in the antenna array. Recommendations on eliminating or mitigating the influence of these factors are given.
Temporal Context in Serial Order of Short-Term Memory
Authors: Cao Lingfei
Published: October 2023

If temporal contexts contribute to serial order in short-term memory is not well understood. Few studies have shown that the temporal context is related to serial order. However, contradicting results from other studies show that there is no relationship between serial recognition and temporal recognition. There is previous research showed that there indeed existed a relationship between temporal recognition and serial recognition. The current study tries to replicate the results from this study through an alternative analysis pipeline to understand the robustness of these results. Using a drift diffusion model, we try to understand the robustness and replicability of the previous research-- Short-term recognition memory for serial order and timing. In results obtained from both the studies, we see that there is no relationship between temporal and serial recognition.
A Comparison of the Resilience, Anxiety, and Life Satisfaction of Chinese Left-Behind Children and International Students
Authors: Li Zixin
Published: October 2023

The present study compared the resilience level, anxiety level, and life satisfaction level of Chinese left-behind children (LBC) and international students (IS) between 11 and 15 years old and investigated the relationships between these three variables and physical activity (PA). Chinese LBC (n = 86) from Guiyang City, Guizhou Province, China and Chinese IS (n = 60) in Vancouver, Canada filled out a survey that measured their resilience level, anxiety level, life satisfaction level, the duration and frequency of PA of different types and intensities in various domains, PA Enjoyment, and participants’ attitudes toward PA. In addition, 10 participants were randomly chosen to participate in an interview after completing the survey. The survey results showed that IS possessed higher resilience level and life satisfaction level than LBC, and both groups had no significant difference in anxiety level; LBC engaged in more PA than IS. Besides, resilience level was positively related to the amount of light PA in household or yard work domain as well as PA enjoyment; anxiety level was negatively related to PA enjoyment as well as annual household income; life satisfaction was positively related to the total amount of PA across all domains as well as PA enjoyment. Participants also mentioned in the interviews the effectiveness of PA in distracting them from worries and other negative emotions, which in turn helped reduce their anxiety and improve their resilience and life satisfaction. Therefore, participating in more PA could be a promising way to improve resilience level and life satisfaction level or reduce anxiety level for the two groups.
Usia Pertanggungjawaban Pidana Anak dalam Perspektif Neurolaw
Authors: Agustiawan M. Hendri , Pujiyono Pujiyono , Rozah Umi
Published: October 2023

Due to recent discoveries and technological advancements in neuroscience, we can gain a deeper understanding of the human brain that significantly impact juvenile criminal law, particularly concerning children's behavior and ability to regulate impulsive behavior. This study aims to analyze the current age of criminal responsibility in the Indonesian legal system using a neurolaw perspective that considers cognitive neuroscience and legal theory. The research utilizes normative legal research methodology with a statute approach and a neuroscience approach. The data obtained from literature research is then analyzed conceptually. The study results indicate that the age of criminal responsibility for children in Indonesia is 12 years; however, it has not yet reached 18 years. According to the neurolaw perspective, brain development within this age range is not fully matured and continues to undergo behavioral changes. This research implies the urgency of revising regulations regarding the age of criminal responsibility for children in Indonesia, considering the discoveries in neuroscience. Using a neurolaw perspective can encourage changes in legal policies that pay more attention to neurological factors in assessing juvenile criminal responsibility. As far as the law governs human behavior, the brain plays a crucial role in controlling that behavior. Therefore, a better understanding of the brain will lead to better and fairer laws.
PROGRAMA MINHA CASA MINHA VIDA, O SONHO DA CASA PRÓPRIA E A CONSTRUÇÃO DO SUJEITO ENDIVIDADO
Authors: Escosteguy Camila Leite , Guareschi Neuza Maria de Fátima , Dos Reis Carolina
Published: October 2023

Este artigo tem como objetivo discutir de que formas as políticas habitacionais no Brasil, em especial o Programa Minha Casa Minha Vida, a partir de seu imperativo da realização do sonho da casa própria vai produzir modos de subjetivação a partir do endividamento da população beneficiária. Analisamos documentos oficiais que norteiam a implementação e a manutenção do PMCMV, evidenciando discursos que atuam de forma a governar a vida da população beneficiária. Apontamos como que com o uso de tecnologias específicas que visam o assujeitamento da população, a atual política habitacional em curso no país, vai produzir aceitabilidade do Programa, bem como a construção de um sujeito endividado econômica e subjetivamente, que servirá aos interesses do jogo neoliberal em curso, evidenciando dessa forma a inseparabilidade entre o desenho das políticas públicas e a produção de sujeitos.
Public Interest as a Criterion for Making Decisions on Compulsory Sale or Alienation of Residential Property (As Illustrated by the Legislation of the Republic of Belarus)
Authors: Khaletskaya Tatyana M.
Published: October 2023

The author analyzes the correlation of private interest of the residential property owner and public interest when making a decision on compulsory alienation of the residential property or a decision on compulsory sale of the residential property. Having considered and analyzed the legislation of the Republic of Belarus, legislative and regulatory compliance practices, and scientific findings on this issue, the author concludes that the concept of “public interest” is vague and it is necessary to reconsider the concept of “social property relations” to protect the interests of the residential property owner and prevent the violation of the property inviolability principle and the right to housing.
Criminal-legal assessment of cyberextortion
Authors: Prudnikov Ilya D.
Published: October 2023

The article discusses the issues of qualification of cyberextortion. In particular, this act is analyzed as a kind of ordinary extortion, as well as a kind of exclusively informational crime. It is concluded that in addition to the threats characteristic of article 163 of the Criminal Code of the Russian Federation, there are also threats that are not included in the list of methods of committing a crime listed in this article, and, accordingly, the impossibility of bringing a person to criminal responsibility for a number of variations of cyberextortion under article 163 of the Criminal Code of the Russian Federation. Since it also seems problematic to qualify such acts according to the totality of article 163 and the norms of the Criminal Code of the Russian Federation on crimes in the field of computer information, the author believes that it is necessary to modernize the criminal law and proposes to supplement the disposition of article 163 of the Criminal Code of the Russian Federation with new ways of committing this crime.
Criteria for the decision to transfer to the upbringing of a child: historical and legal aspect
Authors: Lekanova Ekaterina E.
Published: October 2023

The relevance of the study of the rights and obligations of parents (persons replacing them) for education using a comparative historical and legal method (by referring to Soviet legal experience) is due to the fact that it was during the Soviet period that criteria were developed that are still used by the courts to resolve cases of placing a child in foster care. The courts of the Soviet period, in the framework of cases on the placement of a child for upbringing in order to comply with the principle of the best interests of the child, were guided by the following factors as decisive: 1) the nature of the relationship between the child and the potential caregiver; 2) housing conditions; 3) moral qualities; 4) marital status; 5) the actual opportunity to engage in the upbringing of the child; 6) the opinion of the child; 7) the attachment of the child to brothers and sisters. The system of criteria for resolving cases on the transfer of a child to foster care in the course of Soviet law enforcement practice began to actively form from 1928 in connection with the participation of guardianship and guardianship authorities in such cases. However, the system of such criteria was not enshrined by the legislator either in the text of the 1926 Code of Civil Procedure of the Year or in the text of the Code of Civil Procedure of 1969. The absence of these factors in the legislation is a kind of omission of the Soviet legislator, which allowed the courts to resolve disputes about the upbringing of children without their analysis and consideration, which was especially widespread in the early years of Soviet power. Only in the post-Soviet period, an approximate system of such criteria was reflected in the Family Code of the Russian Federation.
The content and specifics of the microstructural organization meta-thinking (article two)
Authors: Karpov Anatoly V.
Published: October 2023

The paper presents theoretical and experimental materials aimed at solving one of the main problems of modern metacognitivism: the question of the existence of independent content in the main metacognitive processes, as well as its specificity in relation to cognitive processes. The main result of the considered experimental results is the substantiation of a positive solution to this issue and proof that additional procedural content is generated in the main metacognitive process - meta-thinking. It is shown that the meaning and functional purpose of this content is to expand the resource capabilities of the cognitive subsystem of the psyche. The determinative role of synergetic effects of the organization of basic mental operations in relation to the individual measure of the development of meta-thinking is revealed.
LOS MAMÍFEROS FÓSILES Y LAS EDADES DE LAS SEDIMENTITAS CONTINENTALES DEL NEÓGENO DE LA COSTA CARIBE COLOMBIANA
Authors: Villarroel A Carlos , Clavijo Jairo
Published: October 2023

Se estudian y describen restos de cinco mamíferos fósiles continentales de la Costa Caribe Colombiana: Neoglyptatelus sincelejanus n. sp. (Glyptodontidae, Glyptatelinae), Gyriabrus royoi (Rodentia, Dinomyidae), Mixotoxodon larensis (Toxodontidae, Toxodontinae), un Toxodontidae indet. y Haplomastodon waringi (Gomphotheriidae). Sus ubicaciones geográficas y sus respectivas edades hacen posible considerar y discutir aspectos nomenclaturales y cronoestratigráficos de algunas unidades litoestratigráficas neogénicas aflorantes en la región.
VIEJOS Y NUEVOS RESULTADOS SOBRE INTEGRALES SINGULARES E HIPERSINGULARES
Authors: Horváth J.
Published: October 2023

Exposición de algunos trabajos del autor sobre integrales singulares e hipersingulares, publicados entre 1953 y 1987, completada con resultados nuevos, observaciones sobre contribuciones de otros matemáticos, simplificaciones y algunas correcciones.
Conceptual Grounds of the Human Destructive Activity in Tradition of the Social-Psychological Approach: Social-Philosophical Analysis
Authors:   Saratov State Technical University, Ogonesova N.V.
Published: October 2023

The article is devoted to the analysis of the social and philosophical grounds of the destructive human activity. The brief characteristic of various concepts on the given problem which can be divided into two directions conditionally are also given. On the one hand the nature of destruction is examined as a biological predisposition, and on the other hand − as socially determined.