bluuebunny/crossref_metadata_2025 huggingface dataset:
Men in domestic violence and its prevention
Authors:   , HaileSelasse Jennifer Rachael , Groves Allison K.
Published: February 2025

Intimate partner violence (IPV) or domestic violence (DV) has been a human rightsand public health issue of research and prevention advocacy for more than half a century. Still, most studies and interventions target understanding the needs of victims (typically women) despite men's abuse being in critical need of behavioral modification. This mixed methods dissertation, comprised of one quantitative chapter and two qualitative chapters, addressed men's under-engagement in IPV research and prevention in the following ways: 1. Examined whether men's self-reported perpetration of IPV was prospectively associated with their perceived available social support (n=197). 2. Explored how current U.S. domestic violence prevention policy includes men, and 3. Described the experiences and perspectives of policemen who work in domestic violence response (n=20). Results from each of these three studies were as follows: Men who reported abusing their partners in the last six months showed greater statistically significant odds of asking police for help than men who reported perpetrating no partner abuse. In two U.S. state domestic violence prevention policies, men's abuse and roles in prevention work were scarcely represented particularly in proportion to men's disproportionate abuse of women. Finally, policemen participants described how they suffer physical and mental health risks from responding to domestic violence, and they recognize that men's violent behaviors and breadwinning roles exacerbate domestic violence. Overall findings show linkages between men's abuse, how prevention plans include men, and policemen's first responder perspectives on domestic violence. This dissertation contributes much-needed practice-based evidence from the front line of IPV/DV response to the public health discourse on prevention. The results can be useful to policymakers, funders, domestic violence prevention practitioners, researchers, and first responders.
A phenomenological study of the role human resources development plays in building psychological safety for individuals with cognitive deficits to disclose in the workplace
Authors:   , Chiumento Katherine , Rasmussen Harriette
Published: February 2025

This phenomenological study examines the role of human resource (HR) professionals in fostering a psychologically safe workplace that encourages individuals with cognitive deficits to disclose their diagnoses and seek accommodations. Guided by three key research questions--1) How do HR professionals define and operationalize psychological safety in the workplace? 2) How do HR professionals incorporate the needs of employees with cognitive deficits into their psychological safety practices? 3) How do HR professionals describe the inclusion of employees with cognitive deficits?--the study gathered insights from HR professionals with experience in managing invisible disabilities. The first theme identified was the facilitation of psychological safety for all employees, with many participants emphasizing the importance of progressive leadership to achieve organizational climate and culture goals, a theme highlighted in the second finding. The third theme revealed how participants' personal experiences in HR shape their ability to bridge the gap between leadership and employees, all while upholding their own ethical standards. These findings offer valuable perspectives on how HR professionals navigate the challenges of promoting an inclusive work environment for individuals with cognitive impairments.
Leisure Time in Comparison to Life Satisfaction Level of Adults with Physical Disability
Authors: Wysokińska Dominika , Rutkowska Elżbieta , Tomczyszyn Dorota , Rafałko Mateusz , Szepeluk Adam
Published: February 2025

Introduction: Leisure time is an integral part of people’s lifestyles. Recreation and proactive attitude during free time have an impact on physical development of a person with physical disability, moreover, foster building self-esteem.
Research aim: The aim of this article is to identify the forms, dimensions and determinants of leisure behaviour in selected groups of respondents in correlation with the level of satisfaction with your own life.
Method: The research was carried out in the Lublin Province. Two groups of people aged 30–50 took part in it: A – with disability and B – control (a total of 262 respondents of both sexes). The survey research used a questionnaire by Bergier and Tomczyszyn modified with the authors’consent and the Satisfaction with Life Scale (SWLS) adapted by Juczyński.
Results: In their preferred leisure activities, the majority of respondents of both groups indicated primarily physically passive forms of leisure. Interviewees with a disability participated significantly less frequently in physical recreation and their physical activity was characterised by a shorter average duration compared to able-bodied respondents. Among the respondents of both groups an increase in the level of life satisfaction was noted, as well as the increase in time spent practising various sports and recreational activities.
Conclusion: Despite growing public awareness, people with disabilities still prefer passive leisure activities. Free time spent in an active manner had a positive influence on the sense of life satisfaction for able-bodied people, as well as people with disabilities.
Schools in Circles as a Form of Support for Families of Students with Intellectual Disabilities in the Community – Reflections of Teachers and Therapists
Authors: Żyta Agnieszka Beata
Published: February 2025

Introduction: Schools in Circles is a proposal for informal support activities carried out in the family and school environment, involving students with intellectual disabilities and their families in the local community. It is based on the Circle of Support Model implemented in Poland since 2015 and the Canadian program “F-Words for Child Development” by the CanChild.
Research Aim: The aim of the study was to explore how teachers and therapists of individuals with intellectual disabilities evaluate the actions of Schools in Circles and what experiences, concerns, and methods they have for optimizing activities related to its development.
Method: Interpretative phenomenological analysis was used to examine the opinions and experiences of the participants. A focus interview was conducted with nine people actively participating in the School in the Circles in various institutions from northern and southern Poland.
Results: The analysis allowed for the identification of four main themes: 1) the path to Schools in Circles – teachers’ and therapists’ own experiences in promoting and creating Circles of Support, 2) benefits of implementing the project for the student, family, school, and community, 3) concerns and threats to the project (issues with engagement from some staff and families, organizational problems), 4) methods for improving activities within Circles of Support.
Conclusions: The participants recognize the significant potential and value of activities aimed at building and supporting social relationships in the immediate environment of children with intellectual disabilities, with the goal of creating a safe and friendly future. The results can be utilized by professionals working in educational institutions to improve collaboration with families of students with intellectual disabilities and to further develop the concept of Circles of Support during the school education stage.
Power-Sharing in Formal and Non-Formal Education
Authors: Stek-Łopatka Natalia
Published: February 2025

Introduction: This article addresses the issue of power-sharing in formal and non-formal education, defined as the distribution of power in all matters that occur within the educational relationships in which individuals participate.
Research Aim: This article aimed to identify three categories based on a review of existing research: factors influencing power relations among participants of formal and non-formal education; levels of power-sharing in education; and practices of power-sharing in education. Based on these categories, a comprehensive definition of power-sharing in education will be formulated.
Evidence-based Facts: A total of 18 research reports obtained through a systematic search of the Scopus and Google Scholar databases were analysed. The selection criteria included relevance to the topic, identification of strategies, methods, research goals and questions, the study group and conclusions. The analysis distinguished factors influencing the power relationships between teachers and students, such as socio-cultural context, socioeconomic status, responses to students’ activities and mistakes, methods of formulating messages, educational regulations and school subjects. Nine levels of power-sharing were identified, considering the relationships between educational policy, local government, local environment, management, administration, teachers, students and parents and in various configurations of these groups. Additionally, a catalogue of power-sharing practices in the teacher-student relationship was created, encompassing six areas: content, assignments, rules, the teaching/learning process, evaluation and grading and organisation of space.
Summary: The review identified areas within the field of power-sharing in education that require further research, particularly in preschool and early school education, which have been overlooked in previous studies.
The Role of Internet Public Opinion in Shaping Local Elections: A Case Study of the 2021 Nagoya City Mayoral Election
Authors: Ting Zhao Wan , Tatsuhiro Yamamoto
Published: February 2025

Internet public opinion builds on the concept of public opinion and refers to the multiple small public spheres represented online. This article analyzes internet public opinion on X (formerly Twitter) during Japan’s 2021 Nagoya mayoral election. This local election has been in the spotlight due to a signature fraud scandal involving the incumbent, despite his eventual victory. Therefore, we selected this unique case study to analyze content and user interactions. To achieve this, we employed morphological analysis, word co-occurrence network analysis, and social network analysis on the collected tweets. The results reveal that, compared to policy pledges, political scandals garnered considerable attention from local citizens and high-profile celebrities. This dynamic influenced public discourse, leading to a bias on X favoring the newcomer over the incumbent. Additionally, this analysis underscored the considerable impact of mass media as critical sources.
Mediatization@Logic.com
Authors: Mlađenović Nikola
Published: February 2025

Mediatization scholars promised to connect mediatization research with social theory, describe its interplay with other meta-processes, and create a “common theoretically based roof”. Hepp and Couldry state that the concept of logic is unable to do that, yet do not provide for the alternative. The paper argues there is a wide misunderstanding what the concept of logic actually is and what it is bringing to the table. Hepp considers logic in terms of “narrow and reductionist thinking”. Media logic is questioned in terms of its universal validity compared to mathematical or philosophical logic. There are at least two significant problems with this attitude towards logic. First, there is sociological logic. Even the theorists that provide the conceptual background of cultural or constructivist approach to mediatization use the concept of logic: Bourdieu and Elias. While they use the concept of logic to describe the organizing principle of habitus or figuration formations, it is cultural mediatization theorists that reject that. Second, even if media logic is too static or rigid, in times of digitalization and datafication the concept of logic is not institutionalist at all – it is mathematical and philosophical, embodied by digital technology itself, artifical intelligence (logical reasoning), algorithms (logic in software), social bots and automation. The paper argues media logic can help mediatization to become a roof term for media studies.
Sculpting Dynamic Intelligence in E-Commerce Vendor-Customer Relations with Advanced Big Data Analytics Integration
Authors:   Silicon Valley Bank, Kundavaram RamMohan Reddy , Roberts Charlotte ,   i-Proclaim, Onteddu Abhishake Reddy ,   Pearson, Devarapu Krishna ,   Mission Cloud Services Inc.
Published: February 2025

This study examines how sophisticated big data analytics may improve customization, engagement, and operational efficiency in e-commerce vendor-customer relationships. The study focuses on intelligent e-commerce systems using artificial intelligence, machine learning, and predictive analytics to enhance consumer experiences. The paper synthesizes literature on big data applications, problems, and possibilities in e-commerce using secondary data. Big data offers hyper-personalization, real-time client interaction, and operational improvements, but it also raises data privacy, algorithmic bias, and infrastructure scalability problems. The report also suggests that augmented reality, virtual reality, and blockchain will shape customer interaction. Policy implications call for stronger regulatory frameworks that balance innovation, ethics, privacy, and openness. To maximize big data's potential, firms must invest in IT infrastructure, fill talent gaps, and promote ethical data use. This study concludes that data-driven tactics are crucial to creating intelligent and adaptable e-commerce connections, which affect digital market development, trust, and competitiveness.
Advances in Autonomous Robotics for Environmental Cleanup and Hazardous Waste Management
Authors: Kundavaram RamMohan Reddy , Onteddu Abhishake Reddy , Devarapu Krishna , Narsina Deekshith , Nizamuddin Md.
Published: February 2025

This research investigates the progress made in autonomous robots for environmental cleaning and hazardous waste management. The objective is to evaluate their efficacy, adaptability, and prospective influence on existing methods. The study used a secondary data review process to combine information from several case studies, technical breakthroughs, and upcoming robot trends. Autonomous robots improve cleaning efficiency and safety in soil cleanup, oil spill response, garbage sorting, and disaster recovery. AI, sensors, and multi-modal robots boost performance. However, sensor accuracy, navigation, and energy management issues persist. The paper emphasizes the policy implications, such as the need for uniform rules, more investment in research and development, and the significance of addressing ethical and social concerns. By focusing on these specific areas, the incorporation of autonomous robots may be enhanced, resulting in more efficient and environmentally friendly solutions for handling environmental risks and waste.
Biomarkers in clinical practice: opportunities and challenges
Authors: Rapp Paul , Gilpin Adele
Published: February 2025

Many proposed biomarkers fail to produce clinically actionable results. Simply put, the research problem addressed here is: why do most biomarker projects fail? In this contribution we describe four commonly encountered problems and outline procedures that address these challenges. The specific issues addressed are as follows:

A statistically significant result in a between-group hypothesis test often does not result in classification success.

Cross-validation is commonly used in model validation. The successive steps in cross-validation expose it to multiple sources of failure that may result in erroneous conclusions of success.

Failure to rigorously establish the test-retest reliability of a biomarker panel precludes its use in longitudinal monitoring of treatment response or disease progression. Further, it should be recognized that the minimum detectable difference is not the minimal clinically important difference.

Sample size estimates used in the design of a clinical study must be determined by the objectives of the study. The sample sizes required in reliability studies and in the evaluation of biomarkers as prodromes must be determined with those objectives in mind and are far larger than sample size requirements computed for the purpose of hypothesis testing.

We conclude with suggestions for transparency and collaboration that would facilitate the use of biomarkers in clinical practice.
Precursors Need to be Considered to Promote Recovery from Idiopathic Environmental Intolerance–Attributed to Electromagnetic Fields
Authors: Havas Magda
Published: February 2025

Exposure to radiofrequency radiation has been increasing for decades and a growing population is suffering from what has been called electrohypersensitivity. The concept of electrohypersensitivity is problematic as it implies that only those who are “hypersensitive” respond to electromagnetic fields, which is not the case. The World Health Organization recommended replacing this term with idiopathic environmental intolerance with attribution to electromagnetic fields. However, without knowing the cause of this illness medical help is reduced to alleviating symptoms and this is seldom adequate for full recovery. The aim of this report is to help people recover from electrohypersensitivity by understanding what precursors may be contributing to their symptoms. In this paper, three terms are differentiated: trigger, causal agent, and precursor–with the understanding that electromagnetic fields trigger symptoms and, while it is often difficult to identify causal agents, precursors may predispose individuals to an increased vulnerability to environmental stressors including electromagnetic pollution. Five precursor categories are identified: physical trauma to central nervous system; exposure to toxic chemicals; biological infections; acute or chronic exposure to either ionizing or non-ionizing radiation; and an impaired immune system. Recovering from electromagnetic pollution requires deactivating the trigger(s) and the precursors suggest ways this may be accomplished. The acronym R2ID3 may help physicians decide which treatments are likely to be most effective for their patients. The letters signify the following: (R1) reduce exposure to pollutants; (R2) rebalance limbic system; (I) enhance immune system; (D1) detoxify body; (D2) test DNA for patient-specific detoxification protocol; and (D3) employ dental procedures to remove infections and metals. Helping patients recover and minimizing exposure to electromagnetic pollution is of utmost importance from a public health perspective.
Pharmacogenetics of Lead Toxicity
Authors: Diawara Moussa
Published: February 2025

Despite the phasing out of leaded gasoline, lead-based paint and leaded plumbing, lead (Pb) remains a public health risk. Toxicity of Pb occurs primarily due to its inhibition of key enzymes in biosynthesis of heme, a compound required for oxygen biding in bloodstream. One of these enzymes is δ-aminolevulinic acid dehydratase (ALAD), the main binding ligand for Pb in erythrocytes. The ALAD enzyme is encoded by the ALAD gene. This gene has two co-dominant alleles (ALAD1 and ALAD2), three genotypes (ALAD1-1, ALAD1-2 and ALAD2-2) and dozens of detected single nucleotide polymorphisms. The G to C transversion in nucleotide 177 in ALAD2 is the difference between ALAD1 and ALAD2 genotypes. This mutation changed the enzyme activity and is the reason it is suggested that individuals with the less common ALAD2 allele tend to experience a greater susceptibility to Pb toxicity than individuals with ALAD1. However, the association of ALAD polymorphism with Pb toxicity remained inconclusive when Pb exposure resulted in blood Pb level < 10 μg/dL, though numerous studies showed that blood Pb level > 10 μg/dL compromised heme synthesis, with the ALAD activity inversely correlated with blood Pb. This review suggests that use of specific combinations of ALAD single nucleotide polymorphisms as biomarkers for susceptibility to Pb exposure and toxicity might contribute to a better understanding of Pb association with ALAD polymorphism. Based on evidence reviewed herein, the current blood lead reference value of 3.5 μg/dL should be further reduced to 0 μg/dL.
Method for detecting radio signal boundaries in the time-frequency domain based on a multidimensional matrix window operator
Authors: Artemov M.L. , Slichenko M.P. , Trusin S.P.
Published: February 2025

Formulation of the problem. The use of artificial neural networks to solve the problem of detecting and identifying signal structures as objects in the image is not oriented to work in a real, highly dynamic and saturated radio-electronic environment, characterized by intense fluctuations in radio signal parameters and changes in radio link parameters. The fundamental difficulty in creating an up-to-date, complete and reliable reference description of the radio technical parameters of detected radio links determines the need to create highly universal and adaptive algorithms for identifying radio links, which significantly limits the range of applications of the neural network approach to solving these problems.

Target. Develop and analyze a method for detecting the boundaries of a radio signal in the time-frequency domain.

Results. The paper proposes a new multidimensional matrix window operator and a corresponding statistical rule for adaptive detection of the corner of a rectangular signal region in a time-frequency panorama. An exact analytical expression is obtained for the distribution of the decisive detection statistics, the probabilities of false alarms and missed signals.

Practical significance. The implementation of the proposed approach makes it possible to detect and distinguish radio signals from modern radio communication and data transmission lines in a real complex electromagnetic environment, characterized by mutual overlap of frequency-time domains of signals from different radio lines with a priori uncertainty regarding the noise level.
Application of MUSIC super-resolution technique in the phased antenna array for directions of arrival estimation of random signals
Authors: Shmonin O.A. , Kuptsov V.V. , Trushkov S.N. , Ponur K.A.
Published: February 2025

The article is dedicated to the angle position estimation of multiple signal sources. One of the most effective technique in this field is Multiple Signal Classification that is widely known as MUSIC. However, this technique cannot be applied directly to hybrid analog-digital antenna arrays (including the phased antenna arrays) that have been actively developing recently and widely using in the fifth-generation wireless communication systems and radars. Meanwhile, the existing approaches to MUSIC application in such systems either demand ideal periodic signal or have excessively high computational complexity.

The goal of this work is the development of the effective and computational simple approach to the application of MUSIC technique in the phased antenna array for direction of arrival estimation of the random signals.

The keystone of the MUSIC algorithm is the antenna array covariance matrix that allows one to single out complimentary signal and noise vector subspaces. However, this matrix cannot be estimated directly in the phased antenna array. The proposed method is based on the Toeplitz form of the antenna array covariance matrix in the case of incoherent (uncorrelated) sources. In this case the whole covariance matrix is determined by its first row (covariance vector). It is proved that covariance vector can be calculated from the discrete spatial power spectrum via discrete Fourier transform. Meanwhile, the discrete spatial power spectrum is estimated via power measurements for the finite number of antenna array beams. Thus, this spectrum is evaluated via conventional beam scanning procedure. It is showed that the covariance matrix can be recovered accurately if the number of the discrete spectrum points (the number of used beams) at least twice more than the number of antenna elements.

The performance of the proposed technique is investigated via numerical simulations in comparison with competitors. The results shows that the proposed approach provides super resolution and allows one to effectively estimate angular positions of multiple signal sources. The estimate accuracy provided by the proposed technique is similar to the one of the more complex alternative approach that also does not depend on the waveform. Meanwhile, there is some accuracy loss relatively a periodic-signal-based technique and the digital-array MUSIC that is treated as the cost of waveform independency and phased array application.

The devised technique can be applied in radar and fifth-generation wireless communication system to estimate channel state in the millimeter wave band.
Direct digital synthesizer modeling at frequency images
Authors: Korolev A.V. , Rykov S.G.
Published: February 2025

An attempt to implement AD9912 DDS at first and second image frequency revealed a noticeable discrepancy of calculated phase noise with the measurement results, as particular the output phase noise at 1080 MHz was less then at 840 MHz with clock frequency 1 GHz. To mitigate this mismatch a new reconstruction pulse model was developed in assumption that D/A converter of DDS consists of two interleaved converters active for half a clock time. The results of calculations of frequency response both with phase and amplitude noise spectral density with proposed model are given. The experiment demonstrates a good match with model for phase and amplitude noise up to fifth frequency image. Measurements made with DDS AD9910 show similar results. At the same time, AD9914 has a normal frequency response, and its phase noise changes as f 2 up to 3,5 GHz with clock frequency 1 GHz.
Integrated optoelectronic oscillator frequency tuning based on a variable optical time delay line in a loop-back
Authors: Ivanov V.V. , Stepanov I.V. , Voronkov G.S. , Voronkova A.V. , Grakhova E.P.
Published: February 2025

An optoelectronic oscillator, a simple and cost-effective electro-optical system, is known for its ability to generate ultra-high-frequency signals with an ultra-low phase noise level. This system can produce high-frequency signals up to microwaves, often surpassing their electric analogs in these parameters. Some scientific groups have even developed optoelectronic oscillators based on integrated photonics to enhance size and mass characteristics. However, these generators do have their drawbacks, including long-term frequency instability and a significant frequency step (about tens of kilohertz). The first drawback is due to the high sensitivity of optoelectronic oscillators to environmental parameters, particularly ambient temperature. While the thermal stabilization problem of photonic integrated circuits has been addressed, stabilizing the output frequency and its control in integrated optoelectronic oscillators remains a relevant and ongoing challenge in the field.

The paper explores the potential for controlling the output frequency of an optoelectronic oscillator by adjusting the optical delay line in the feedback loop. We introduce a scheme for an optoelectronic oscillator based on the silicon-on-insulator platform and provide a mathematical model for the oscillator with a tunable optical delay line in the feedback loop. The tuning step for the output frequency is 50 MHz/ps, calculated analytically. We conducted numerical simulations using Ansys Lumerical Interconnect software to verify the mathematical model. The results show that the output frequency can be tuned in the range of 4.28 GHz, with a frequency step ranging from 30 to 60 MHz/ps. The maximum frequency deviation from the simulation is 20 MHz, approximately 0.2% of the output frequency. The obtained results demonstrate the effectiveness of the proposed frequency control method for various applications of the optoelectronic oscillator.

The linear mathematical model we have developed can be used to calculate the output frequency of the optoelectronic oscillator while accounting for nonlinear errors. However, creating a comprehensive mathematical model that considers the nonlinear effects of integrated photonics will require further elaboration and development in future studies.

The frequency tuning approach we have presented can be implemented using discrete optical components. However, in this case, the minimum frequency tuning step is limited by the discrete time delay in the optical delay line. On the other hand, an integrated optical delay line offers similar time delay control. This time delay tuning provides additional flexibility for controlling the output frequency within the optoelectronic oscillator eigenfrequencies, which are constrained by the frequency response of the notch filter.
Method for evaluating electromagnetic compatibility of fixed satellite service earth stations with low-orbit multi-satellite communication systems
Authors: Vorona M. S. , Kopalov Yu. N. , Maslik А. G. , Onufrey A. Yu.
Published: February 2025

Against the background of significant achievements in SpaceX's deployment of the Starlink low-orbit multi-satellite communication system (LOMCS), the number of similar projects is increasing. They are developed both by private companies, for example, Amazon, and through government programs, for example, the Chinese LOMCS GuoWang. There are similar projects in the Russian Federation.

A significant increase in the number of LOMCS spacecraft complicates the task of ensuring their electromagnetic compatibility with the fixed satellite service (FSS) earth stations (ES). In [5], the authors proposed a method for assessing the electromagnetic compatibility of LOMCS user terminals with the FSS ES. At the same time, it is advisable to solve the opposite problem when the source of unintentional interference is not the FSS ES, but the LOMCS spacecraft.

To justify the requirements for FSS ES receivers, as well as the structure of the orbital constellation, the frequency ranges used and the types of signals of promising LOMCS, it is necessary to assess how the signal-to-noise ratio at the input of the FSS ES receiver changes. The corresponding method has been proposed in the article and examples of calculations performed for Starlink LOMCS have been given. It is also necessary to develop a method for assessing the electromagnetic compatibility of FSS ES with LOMCS.

The proposed method allows calculating the signal-to-noise ratio at the input of the receiving devices of the FSS ES in conditions of unintentional interference from the LOMCS spacecraft. Calculations have been made using the proposed method using Starlink LOMCS as an example. The proposed method also allows us to calculate the idea of the effect of LOMCS on the reception of FSS ES signals. The method can be used to form requirements for both the receiving devices of the FSS ES and the promising domestic LOMCS.
Comparative analysis of different types of modulation in satellite communications systems with class AB amplifiers operating in the saturation mode
Authors: Fominykh A. M. , Luferchik P. V. , Komarov A. A. , Arkhipov A. V. , Vorobev N. A. , Smirnov E. V.
Published: February 2025

The article addresses the issue of increasing the autonomy of portable satellite communications stations. One of the ways to enhance the autonomy of portable communication stations is to use a power amplifier in saturation mode instead of linear mode to improve efficiency. However, when using an amplifier in saturation mode, it is necessary to choose an appropriate type of modulation to minimize the level of out-of-band emissions (which leads to a deterioration in demodulation accuracy). In this regard, studies have been conducted to examine the effect of amplifier parameters in saturation mode on the quality of the transmitted signal. A software-hardware platform has been developed to conduct the studies, which investigated both standard modulations and modulations with nonlinear filtering. The studies have revealed that, in saturation mode, the effect of changes in input power on output power is minimal, but the signal spectrum deteriorates due to increased nonlinear distortions, especially in signals with a non-zero peak factor. The studies have also showed that using OQPSK modulation with a Nyquist filter and roll-off factor of 90% provided the best results in terms of both spectral and energy efficiency among the considered types of modulation for the power amplifier under investigation, minimizing distortions and maintaining high signal fidelity.
Experimental study of tropospheric communication station in northern regions
Authors: Chashchin D. V. , Vorobev N. A. , Konev A. N. , Luferchik P. V.
Published: February 2025

In order to provide stable communication in the northern regions of the country tropospheric communication stations can be used. However, it is known that tropospheric stations are subject to the influence of climatic conditions of the environment. Therefore, there is a problem of determining the dependence of the throughput capacity of a tropospheric pair of stations located in the subarctic climate region on external climatic influences. The goal of the paper is to conduct an experimental study of the tropospheric communication station “Groza-1.5” in the conditions of the north, to assess the dependence of the throughput capacity on the climatic parameters of the troposphere. As a result of the experimental study, the dependence of the tropospheric station capacity on the refractive index of the air near the surface of the medium for a day and for two weeks have been obtained. The correlation coefficient between the throughput capacity and the air refractive index was 0,8966. Further studies of the dependence of the station throughput on climatic conditions will make it possible to predict the maximum possible throughput under specific climatic conditions.
Hacia una ontología de factores de desapego en procesos de lectura digital en educación superior
Authors: Merchán-Sánchez-Jara Javier-Félix , Mastrobattista Ludovica , Muñoz-Rico María , González-Gutiérrez Sara , Cordón-García José-Antonio
Published: February 2025

El consumo de información en entornos digitales ha transformado de forma disruptiva los modelos y prácticas lectoras históricamente consolidadas bajo la influencia del libro como dispositivo para la lectura impresa. El ecosistema digital ha difundido un nuevo estilo de lectura, caracterizado principalmente por ser más rápido y selectivo, en el que se anteponen de manera paradigmática cuestiones relacionadas con el pragmatismo y la productividad, frente a las ventajas de lo analógico en el ámbito cognitivo y sensorial. El presente estudio identifica y analiza los factores percibidos de desapego hacia la lectura digital en el contexto específico de la práctica lectora en la comunidad educativa en la Universidad de Salamanca. Para ello se pregunta a una muestra representativa (n=25) de alumnos y profesores seleccionados mediante muestreo aleatorio simple, a través de una entrevista semiestructurada, y se estudian los resultados con la asistencia de la herramienta Atlas.ti. Los resultados permiten identificar y analizar una serie de factores, y sus interrelaciones, que apelan a aspectos como la cognición, la percepción emocional y/o estética, la accesibilidad o la potencialidad pragmática, entre otros, que conforman la realidad ontológica que explica el desapego, y la resistencia de lo impreso, frente al proceso colonizador de las tecnologías digitales.
Los movimientos oculares, un camino para comprender las dificultades en el procesamiento de la lectura
Authors: Rodríguez Karina-Viviana , Fonseca Liliana , Iaconis Francisco-Ramiro , Del-Punta Jessica , Gasaneo Gustavo
Published: February 2025

El objetivo de este estudio consiste en comparar las características de la lectura en español en niños disléxicos y lectores neurotípicos en base a sus movimientos oculares, según las distintas variables que los caracterizan: tiempo de lectura, número y duración de fijaciones, amplitud, duración y velocidad de sacadas, número de regresiones y distancia recorrida. Para esto se estudiaron los movimientos oculares durante la lectura de palabras y textos de 36 niños de 9-10 años, 11 de los cuales fueron diagnosticados con dislexia. El análisis evidenció diferencias significativas en algunas de las variables estudiadas. Los niños disléxicos realizan un mayor número de fijaciones, requieren mayor tiempo para completar la lectura, realizan sacadas más cortas y más regresiones en comparación con lectores neurotípicos. La distancia media recorrida y la duración de las fijaciones es similar en ambos grupos.
Hermann Hesse y el perenne laberinto adolescente en sus obras
Authors: Obiols-Suari Núria
Published: February 2025

En esta investigación se indaga sobre las vivencias adolescentes en una selección de obras de Hermann Hesse (1877-1962). En ellas se halla una miscelánea de cuestiones personales y sociales. Se trata de obras cercanas al concepto de Bildungsroman o novela de formación. El objetivo de este trabajo es el de analizar una recopilación de doce novelas cuyos contenidos resultan relevantes por cómo se relata la experiencia vital adolescente y se hilvana a relaciones humanas de distinta intensidad y naturaleza. Posteriormente se ha procedido a un análisis de contenidos mediante el programa Atas.ti (versión 23). Su interpretación indica que las obras recrean las siguientes temáticas: la concepción de la contradicción o dualidad humana, la muerte y el suicidio, la cultura como compañía vital, el vínculo afectivo, la formación y una renovación que permite retomar el camino perdido. El conjunto conforma el retrato del adolescente en busca de un sentido de la vida. La obra de Hesse goza de una evidente vigencia que permite enriquecer las lecturas de los jóvenes a los que las coyunturas actuales los impregnan a menudo de un grado preocupante de incertidumbre.
National Scientific Conference “Digitization – computerization – cybersecurity. Prospects, opportunities and threats for public administration”, Szczecin–Radom, 4 July 2023
Authors: Skoczylas Dominika , Śwital Paweł
Published: February 2025

Ogólnopolska konferencja naukowa „Cyfryzacja – informatyzacja – cyberbezpieczeństwo. Perspektywy, szanse i zagrożenia dla administracji publicznej” odbyła się 4 lipca 2023 roku w wersji hybrydowej. Organizatorami wydarzenia był Wydział Prawa i Administracji Uniwersytetu Szczecińskiego oraz Wydział Prawa i Administracji Uniwersytetu Technologiczno-Humanistycznego im. Kazimierza Pułaskiego w Radomiu. Z ramienia Wydziału Prawa i Administracji Uniwersytetu Szczecińskiego oraz Wydziału Prawa i Administracji Uniwersytetu Technologiczno-Humanistycznego im. Kazimierza Pułaskiego w Radomiu organizatorami wydarzenia byli odpowiednio dr Dominika Skoczylas i dr Paweł Śwital. Konferencja została zorganizowana w ramach stażu badawczo-dydaktycznego realizowanego przez dr Dominikę Skoczylas na Uniwersytecie Technologiczno-Humanistycznym im. Kazimierza Pułaskiego w Radomiu oraz dra Pawła Świtala na Uniwersytecie Szczecińskim.
Indian Divine Astronomy
Authors: Ravikiran S. , Harichandra B. P. , Sangeetha A. , Nagabhushana B. M.
Published: February 2025

Astronomy is the science of studying the movements of the earth, the planets and the other celestial bodies around the earth like sun, moon, stars etc. It is a field of applied mathematics. Ancient Indian Scientists like Aryabhata, Varahamihira, Vateshwara and others have made huge contributions to the field of astronomy. The present paper, apart from giving a brief overview of contributions in the field of astronomy also highlights the unique features of Indian astronomy over the astronomy elsewhere. The paper deals with explanation of the birth and death of earth and calculation of time and date with earth as reference as against the Gregorian system which is an individual based.
Optimisation of Pre-Engineered Buildings
Authors: Rao B. Suguna , Dodamani Pratiksha U.
Published: February 2025

In traditional building practice, a lot of construction material is wasted, because the structures are often grossly over-dimensioned. Inevitably, optimisation is a fundamental aspect of human life as well as a feature of nature. Although numerical optimisation methods have the potential to minimise the usage of structural materials, their application in routine design practice is limited by the absence of tailored algorithms. Structural optimisation based on mathematical computing is one of the approaches for sustainable and effective design in the field of civil engineering. It includes the formulation of the optimisation problem, defining variables, objective functions and constraints followed by a suitable optimisation method with mathematical programming to achieve structural optimisation resulting in reduced overall weight and cost of the structure. The current study includes an overview of prior research on structural optimisation and provides an analysis of the optimisation objectives, optimisation process and different methods and their limitations. The paper includes a numerical study to suggest an optimal design solution for a structural element which is part of a considered pre-engineered building. Topology optimisation of a conventional steel beam (I- section) is performed by numerical analysis along with the finite element method in ABAQUS. The topology optimisation of the beam in terms of decreasing the profile volume reduces the overall material consumed, thereby reducing the cost of the structure. The current numerical analysis helps in arriving at a cost-effective and efficient design solution for a typical pre-engineered building alternative to experimental tests and conventional trials.
Metal Nanoparticles as Effective Adsorbents to Treat Mining Industry Wastewater
Authors: Kumar G. Vijay , Trilokchandran B.
Published: February 2025

Water containing various toxic contaminants is one of the most severe problems throughout the world. Many technologies have been used to treat such water in the past few decades. Current technologies contain the process of ion exchange, electrochemical methods and flotation. The use of nanotechnology is gaining importance every day in this line. Aluminium titanium, silicon and iron oxides are gaining importance as iron oxide is the cheapest metal available in good quantity in nature which also has suitable magnetic a good property when compared to other oxides. Its properties can be exploited to remove heavy toxic metal pollutants from contaminated water. In the present work, nanoparticles of iron oxide were used to remove the Lead (Pb) (II) ions present in the mining industrial wastewater. The efficiency of adsorption was studied by the Freundlich mathematical model. The results show that the magnetite nanomaterial can be used effectively as a potent adsorbent material in Standard Temperature and Pressure (STP).
Structural and Modal Analysis of Chassis Frame Using Mild Steel
Authors: Kumar S. M. Sanjay , Swamy V. G. Narayana , Nikhilesh S. B. , Prajwal N. M. , Praveen M. J.
Published: February 2025

The frame, suspension, wheels, and brakes make up a two-chassis. wheeler's The two-overall wheeler's design is mostly determined by its chassis. The primary carrying systems of a vehicle are its chassis. The frame acts as a foundation on which components like the engine and transmission are attached. It can be made of alloy, steel, or aluminium. The goal of this effort is to create a chassis that must be tested for jerk motions within the vehicle. By making suggestions to the business, the problem of jerking and brake noise will be resolved. CATIA V5 was used to model the chassis, and ANSYS was used to analyse it in order to check for stress, displacement, and deformation. Results for 5mm and 10mm diameter thickness were obtained after the chassis model was examined using ANSYS.
Impact Analysis and Mechanical Characterization of Sandwich Composites
Authors: Srirampur Pranav S. , Doddabasayyaswamy H. , Sagar K. , Sridhar B. S. , Shashikala A. R.
Published: February 2025

A waterproof roofing laminate comprises an Areca fibre mat with a coconut coir sandwiched layer, the fibre acts as with the fibre laid on top as an insulating layer and a top layer that visibly reflects radiant energy such as light, infrared, sunlight and ultraviolet light. Growing concerns about global warming and the depletion of oil reserves have led scientists to focus more on using natural fibres such as bagasse, coir, sisal, jute, etc. Natural Fibre Reinforcement in composites has recently attracted attention due to its low cost, ready availability, low density1, acceptable specific parameters, easy specifications, enhanced energy, and recyclable nature. There, is an impact of various elements like fibre diameter, fibre content, density, fibre size, the geometry of fibre and coupling agents towards the automatic properties, and thermal properties. Natural fibres and natural fibre composites can be used in engineering applications because of their environmental suitability and economical nature. The combination of fibres is an excellent way to improve the mechanical, and thermal stability of Epoxy Compounds reinforced with Natural Fibre2. Coconut Fibres are environmentally safe, and pellucid with a well-put-in-order structure, towering tensile strength than glass, superior elasticity, and magnificent resilience.
NiGrFeS HVAF Coating for Cold Rolled Steel Substrate: Microstructure Characteristics and Properties
Authors: Naveen G. J. , Kumaran P. Sampath , Sathyanarayanaswamy A. , Bindagi P. T. , Mukunda P. G.
Published: February 2025

Using air as the oxidizing gas, the High Velocity Air Fuel spray technique, often known as HVAF, sprays high velocity flames. The idea behind this novel approach is to use particle temperatures below or near their melting point while maintaining high particle velocities, allowing for plastic deformation at impact and coating development. In spite of research on HVAF coating having been conducted in the past, the issues of coating quality and surface finish are still a work in progress. According to the authors, this represents the first instance that NiGrFeS has been used for producing HVAF coatings on cold rolled SAE1008 steel designated substrate. This paper demonstrates the characterization of HVAF sprayed NiGrFeS coating on ASTM 1008 cold rolled steel as a substrate to improve surface properties for diversity of applications. A combination of characterization techniques, such as XRD and SEM/EDAX procedures, were used to evaluate the samples. According to their mechanical and microstructural characteristics, the as-deposited coatings are described. Additionally, assessed were the porosity, microhardness, coating thicknesses, and coating density. Microhardness readings have indeed been reported to have decreased from the coating to substrate material. In comparison to traditional coating processes, High-Velocity Air Fuel (HVAF) coating methods provide coatings with superior characteristics.
Optimisation of Permanent Magnet Eddy Current Braking System using Aluminum Discs by Taguchi Technique
Authors: Krishna G. L. Anantha
Published: February 2025

In this work, an attempt has been made to understand the suitability of various positions of permanent magnets, the optimum thickness and speed of Aluminum discs, and Taguchi parameter optimisation. L9 orthogonal array was chosen for the analysis. From Signal to Noise (S/N) ratio calculations it was observed that 3000 rpm, 4mm thick disc and solo magnet with swift application situation were optimum values. SS% from ANOVA indicated that the position of magnets has the greatest influence on brake parameters. The permanent magnet used is a Neodymium – Iron – Boron (NdFeB) magnet. The brake parameters recorded are speed reduction percentage, time consumed and negative acceleration. In solo magnet condition and solo magnet with swift application, better brake parameters were observed in a 4mm thick disc. Solo magnet condition with a 4mm thick disc may be suitable for elevated-speed train applications. Solo magnet with swift application situation may be suitable for high-speed automotive applications.