bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the variation of dielectric properties of oil‐paper insulation for power equipment over a wide temperature range
Authors: Zhang Mingze , Yu Muhe , Zhou Wen , Liang Yilin , Lei Shengjie , Shi Yunbo , Qu Limin 
Published: December 2023

AbstractThe main part of oil‐immersed power equipment is oil‐paper insulation. At lower ambient temperatures, transformer oil will become viscous. As a result, compared to those at room temperature or operating temperature, the frequency domain dielectric properties of oil‐paper insulation at low temperatures are drastically different. For evaluating the insulation condition of electrical equipment, it is essential to accurately determine their dielectric properties. This paper described the FDS test, the DC conductivity test, and the transformer oil viscosity test, which was carried out in a laboratory environment for different ageing of oil‐immersed pressboard and transformer oil at 233–373 K. The effects of temperature on the dielectric properties at the competing mechanisms of polarisation and conductivity loss were clarified based on variations of the FDS curves. Considering the viscosity change of ageing transformer oil at low temperatures, the Arrhenius and VFT viscosity equations were used to achieve a fitting calculation in the different temperature zones. Based on the molecular/ion transition model in the force field and electric field, the characterisation relationships between the dynamic viscosity, DC conductivity, and test temperature of transformer oil were established. The limitations of conventional transformer oil equivalent dielectric relaxation models over a wide temperature range were finally clarified by combining the test findings of the DC conductivity over a wide temperature range with observed and simulated calculations. This paper provides an essential theoretical reference when using the FDS test to diagnose the insulation performance of oil‐immersed power equipment in extremely cold regions.
TIR‐YOLO‐ADAS: A thermal infrared object detection framework for advanced driver assistance systems
Authors: Ding Meng , Guan Song , Liu Hao , Yu Kuaikuai 
Published: December 2023

AbstractAn object detection framework using thermal infrared (TIR) cameras is proposed to meet the needs of an advanced driver assistance system (ADAS) operating at night‐time and in low‐visibility conditions. The proposed detection framework, referred to as TIR‐YOLO‐ADAS, is an improvement of YOLOX for TIR object detection in ADAS. First, to address the disadvantages of TIR objects, the part of the attention mechanism is designed to enhance the discriminative ability of feature maps in the spatial and channel dimensions. Second, a focal loss function is used as the confidence loss function to enable the framework to focus on detection tasks of difficult, misclassified targets in the process of network training. The results of the ablation experiment on the Forward‐looking infrared (FLIR) thermal ADAS dataset indicate that the proposed framework significantly improves the performance of TIR object detection. Comparative experimental results further show that TIR‐YOLO‐ADAS performs favourably when compared with three representative detection algorithms. To evaluate the practicality and feasibility of the proposed framework in various applications, a qualitative assessment in real road scenarios was conducted. The experimental results confirm that the proposed framework performs promisingly and could be integrated into vehicle platforms as an ADAS module.
Statistical analysis of the radar cross section of two small fixed‐wing drones using typical flights
Authors: Björklund Svante , Hernnäs Harald 
Published: December 2023

AbstractThe presence and importance of small drones (unmanned aerial vehicles) are increasing. With traditional radar detection the target radar cross section and its statistical properties are needed in order to design the detector and to assess detection performance. The authors make a statistical analysis of the radar cross section of two small fixed‐wing drones using measured data from typical flights. Using data from a typical flight instead of measurements or electromagnetic calculations as a function of aspect angle is a convenient method. Work results of the authors in mean values, medians and standard deviations, in analyses of common target probability distributions and in decorrelation times for the radar cross section, are necessary for design and assessment of the detection performance. The authors suggest a new target probability distribution which agrees better with the measured data than the others tested. The authors also note significant differences between the drones.
Is Diabetes a Contraindication to Lower Extremity Flap Reconstruction? An Analysis of Threatened Lower Extremities in the NSQIP Database (2010–2020)
Authors: Chen Amy , Garvey Shannon R. , Saxena Nimish , Bustos Valeria P. , Jia Emmeline , Morgenstern Monica , Nanda Asha D. , Dowlatshahi Arriyan S. , Cauley Ryan P. 
Published: December 2023

Abstract
Background The impact of diabetes on complication rates following free flap (FF), pedicled flap (PF), and amputation (AMP) procedures on the lower extremity (LE) is examined.
Methods Patients who underwent LE PF, FF, and AMP procedures were identified from the 2010 to 2020 American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP®) database using Current Procedural Terminology and International Classification of Diseases-9/10 codes, excluding cases for non-LE pathologies. The cohort was divided into diabetics and nondiabetics. Univariate and adjusted multivariable logistic regression analyses were performed.
Results Among 38,998 patients undergoing LE procedures, 58% were diabetic. Among diabetics, 95% underwent AMP, 5% underwent PF, and <1% underwent FF. Across all procedure types, noninsulin-dependent (NIDDM) and insulin-dependent diabetes mellitus (IDDM) were associated with significantly greater all-cause complication rates compared with absence of diabetes, and IDDM was generally higher risk than NIDDM. Among diabetics, complication rates were not significantly different across procedure types (IDDM: p = 0.5969; NIDDM: p = 0.1902). On adjusted subgroup analysis by diabetic status, flap procedures were not associated with higher odds of complications compared with amputation for IDDM and NIDDM patients. Length of stay > 30 days was statistically associated with IDDM, particularly those undergoing FF (AMP: 5%, PF: 7%, FF: 14%, p = 0.0004).
Conclusion Our study highlights the importance of preoperative diabetic optimization prior to LE procedures. For diabetic patients, there were few significant differences in complication rates across procedure type, suggesting that diabetic patients are not at higher risk of complications when attempting limb salvage instead of amputation.
Transaneurysmal Access with Suture-Mediated Closure Device to Treat Iatrogenic Common Femoral Artery Pseudoaneurysm under Ultrasound Guidance: A Novel Technique
Authors: Shariq Mohd , Bellam-Premnath Krishna Prasad , Hegab Shady 
Published: December 2023

AbstractWe describe three cases that were complicated by access site-related common femoral artery pseudoaneurysm following therapeutic endovascular procedures. In all the cases, presentation was with painful swelling in the right groin that was tender and pulsatile on palpation; further evaluation with color Doppler ultrasound revealed pseudoaneurysm at the access site in common femoral artery. Ultrasound-guided transaneurysmal access was obtained and ProStyle (Abbott Vascular, Redwood City, California, United States) suture-mediated device was used to treat the pseudoaneurysm safely and successfully.
Globalizing research on global cities and international business
Authors: Fan C. Cindy 
Published: December 2023

AbstractLiving up to the expectations of the JIBS Decade Award, Goerzen, Asmussen, and Nielsen’s 2013 paper not only introduced the literature on global cities to the international business (IB) community but continues to be generative. In their “Retrospective and a Looking Forward” paper 10 years later, the authors highlight megatrends about people, places and things, and new contexts and alternative perspectives, and they encourage further new ways of thinking about global cities and IB. This commentary expands upon their framework of three overlapping circles of global issues, global organizations, and global locations, by drawing especially from recent experiences in the U.S. and research in economic geography and allied fields. Facing global issues of climate change, human rights, health, housing, and the impacts of digital technologies on work, cities offer prospects of responding to these challenges, a context for multinational enterprises (MNEs) to consider. Against the backdrop of large-scale global migrations of unskilled, mostly contract, workers to global cities in developed economies, recruitment agencies and advocacy groups for migrants are global organizations as important as MNEs. Finally, the fluidity of physical boundaries, as illustrated by city-regions, world regions beyond traditional Western-centric perspectives, and intra-national variations, is key to analyzing global locations.
Understanding the paradox of high job quality evaluations among platform workers
Authors: Švagan Barbara 
Published: December 2023

AbstractThis article examines why food delivery platform workers evaluate their job quality as high despite known drawbacks of this type of employment. Using qualitative data obtained from 20 semi-structured interviews conducted with couriers in Slovenia, the study employs a job quality model consisting of four distinct components (psychological well-being, social satisfaction, economic stability, and health and safety) as a conceptual framework used to determine which elements contribute most to the general job quality evaluation. Findings show that couriers often acknowledge the financial challenges and potential health and safety risks associated with their occupation but are willing to overlook some of these drawbacks due to how highly they value the autonomy, freedom and favourable work-life balance platforms offer. This article argues that platform companies, characterised as permissive entities which still hold a significant amount of power over the labour process, take advantage of the workers’ desire for autonomy and the large worker turnover to continue precarious employment practices. This is additionally fuelled by poor management practices and interpersonal relationships in traditional employment, which often push workers into platform work with no human supervisor, where they can “be their own boss”.
IDADA: towards a multimethod methodological framework for PhD by publication underpinned by critical realism
Authors: Adesemowo A. Kayode 
Published: December 2023

AbstractPhD by publication, a route of attaining a ‘doctorate’, is growing in adoption, yet has not gained universal acceptance. Whilst doctoral students are expected to free range, be independent in their study, and contribute to knowledge, there is a tendency to be schooled or mainly assessed along the lines of positivism and interpretivism. This paper, in part the author’s situational reflexivity and noting Liezel Frick’s “PhD by publication – panacea or paralysis?”, carried out a documentary analysis of academic regulations of 101 universities in the UK, South Africa, Ireland, Australia, and examined the literature for demi-regularities supporting or inhibiting critical realism in doctoral studies. It followed a (multimethod) plural approach. The examination revealed that critical realism is sparse in doctoral studies, and universities do not cohere in nomenclature and ‘form’ of PhD by publication. In filling the ‘free range’ gap, this paper contributes to the ongoing discourse on PhD by publication by introducing the IDADA (‘identify’, ‘define’, ‘analyse’, ‘develop’ and ‘apply’) methodological framework. The framework evolved from the demi-regularities understudied. IDADA is a practical solution-centric, methodological approach to PhD by publication. The paper calls on researchers and practitioners to be open to structured and ‘alternate’ approaches to research whilst ensuring ontological, epistemological, and axiomatic rigour. Researchers need not approach research religiously — as that of a particular paradigm sect; but rather embrace ‘practical adequacy’. Doctoral students should be encouraged to produce research output with more significant impact through interrogation and unearthing phenomena rather than just “observing, outlining and discussing findings” or conforming to ‘writing style’.
Attitudes to language and bilingualism in residential care for older persons in Ireland
Authors: Müller Nicole , Medina Angela M. 
Published: December 2023

Abstract
Language as a primary vehicle for communication and cognition is intimately linked to the construction of identities and social relationships, and to social participation and inclusion. By means of appraisal analysis (a tool grounded in Systemic Functional Linguistics) of interview data, we explored attitudes to language(s), speakers and language use in a nursing home for older people in Ireland, where a large proportion of residents and staff are bilingual in Irish and English. We found that in their interviews, participating residents accord high value to their bilingualism and status of native Irish speakers. Participating staff members emphasize the value of Irish for relationship building and positive interactions among residents and staff. Residents’ strong bilingual identities and language preferences set a standard for deliberately bilingual practices, which affirm the local linguistic and cultural identity, while also actively including non-Irish speaking residents by treating both languages as resources for belonging.
Statistic Study of Gaseous Air Contamination in the City of Svishtov, Bulgaria
Authors: Nikolova Mariana , Zheleva Ivanka , Filipova Margaritka 
Published: December 2023

Abstract
Polluted air has a negative impact on human health and plant and animal life. There are two types of sources of air pollution: human activity (transport, heating, industry and others) and natural phenomena such as natural fires, volcanic activity, deforestation and others. Substances that are the most common air pollutants are dust particles, carbon and nitrogen dioxides, carbon and nitrogen oxides, hydrocarbons; aldehydes; radioactive substances, heavy metals, sulfur dioxide, ozone, etc. Gaseous air pollutants of primary concern in urban environments include sulfur dioxide, nitrogen dioxide, and carbon monoxide. Sulfur dioxide is a colorless gas that is a product of volcanic eruptions and various industrial processes. It’s usually released when coal and oil are burned. Nitrogen oxides, especially nitrogen dioxide, are poisonous gases with a pungent, suffocating odor. There are many regulations aimed at air pollution and pollution monitoring for all European countries. Bulgaria, as part of the EU, must comply with all these regulations. There are still many places and periods of time in Bulgaria over the years with air pollution greater than daily norms. The present study is dedicated to the study of air pollution with gaseous substances in the area of Svishtov, Bulgaria. The town of Svishtov is located in Northern Bulgaria, on the banks of the Danube River, where the southernmost point of the river along its entire length is located. A statistical analysis of the level of air pollution in Svishtov based on official data from the monitoring station in the city is presented. The measurements cover the period 2021 - 2023. All research results are presented graphically and commented.
Improving 3-Junction and 2-Junction solar cell efficiency by down-converting solar UV light to visible
Authors: Fedoseyev Alex , Herasimenka Stan , Sarkisov Sergey , Bogner Brandon , Polly Stephen , Hubbard Seth 
Published: December 2023

Abstract
The approach to efficiency improvement of space 3-Junction and 2-Junction solar cells, that involves a layer of down-converting material on the top of the cell, is presented. The layer consists of a polymer nanocomposite coating impregnated with the nanoparticles of inorganic compounds (fluorides or oxides) doped with rare earth ions down-converting solar UV light to visible matching the spectrum of the responsivity of the cell. Computational model of a solar cell is presented and used for processing the experimental data. Experimental results demonstrate an increase of the generated current and photoelectric efficiency.
Raster image processing using 2D Padé-type approximations
Authors: Olevskyi V I , Olevska Yu B , Olevskyi O V , Hnatushenko V V 
Published: December 2023

Abstract
We have developed a method called the two-dimensional Padé-type approximants method, which can be used to reduce the Gibbs phenomenon in the harmonic two-dimensional Fourier series. This method can be applied to both monochrome and color raster images. To do this, we implement the generalized two-dimensional Padé approximation proposed by Chisholm. In this approach, we select the range of frequency values on the integer grid according to the Vavilov method. We propose a definition of a Padé-type functional and provide examples of its application to simple discontinuous templates represented as raster images. Through this study, we are able to draw conclusions about the practical usage and advantages of the Padé-type approximation. We demonstrate that the Padé-type approximant effectively eliminates distortions associated with the Gibbs phenomenon, and it is visually more appropriate than the Fourier approximant. Additionally, the application of the Padé-type approximation reduces the number of parameters without sacrificing precision.
Reconstruction coefficient analysis of honeybee collapse due to pesticide contamination
Authors: Koleva Miglena N. , Vulkov Lubin G. 
Published: December 2023

Abstract
In this paper we consider the inverse problems of identifying space-dependent coefficients of the mortality rate of the bees and the rate of contamination of the forager bees by pesticides. The model is described by a weakly coupled system of two reaction-diffusion equations for the spatial distribution of uncontaminated and contaminated foraging bees. Final time t = T observations of the density of uncontaminant and contaminant forager bees are used. We propose two approaches for studying the problems. The first one uses the overspecified information to transform the problems into non-linear parabolic equations involving the solution values at the final time. This allows us to prove, using fixed-point arguments, existence of solution to the inverse problems. The second study employs the concept of the quasi-solution to establish existence of solution to the inverse problems as minimizers of least-square cost functionals.
Algebraic Geometry and Elliptic Integrals Approach for Calculation of the Propagation Time of a Signal Between GPS Satellites with Account of General Relativity Theory
Authors: Dimitrov Bogdan G. 
Published: December 2023

Abstract
The approach for calculating the propagation time of a signal between GPS satellites will be summarized, based on the proposed new theoretical approach in several previous publications, as well as the perspectives for future development of the theory. Topics include: 1. Basic notions of inter-satellite communications. 2. Shapiro delay formulae in General Relativity Theory - basic formalism and the necessity to extend the formalism by taking into account the satellite motion on a plane elliptic or space-distributed elliptic orbit. 3. Basic facts about the disturbed motion in celestial mechanics and the necessity to incorporate it in the theory of inter-satellite communications, accounting for General Relativity Effects. 4. Propagation time of a signal, emitted by a satellite on a plane and also space-distributed elliptical orbit in terms of zero-order elliptic integrals and respectively of higher order integrals. Proof of the real-valuedness of the propagation time for all cases as one of the criteria for the correctness of the theoretical approach. 5. New analytical algorithms for calculation of zero-order elliptic integrals in the Legendre form. Relation to two representations in the Weierstrass form. 6. The new formalism of intersecting four-dimensional null cones and the resulting physical notions of the (intersecting)) space-time interval (with the property of being positive, negative or equal to zero) and the (intersecting) geodesic distance (being only positive, because is related to the distance, travelled by light or radio signals). Proof of these properties in the general case and in some partial cases. New numerical estimate E
lim > 45.002510943228 [deg], above which the space-time interval is positive and thus inter-satellite communications between satellites on one plane elliptical orbit are possible. The angular distance of 45[ deg] is typical for the disposition of 8 satellites on one orbit in the Russian satellite constellation GLON ASS, so it might be claimed that such a configuration is favourable from the point of view of inter-satellite communications (with account of GRT effects).
Approaches for improvement of reliability of the Prony’s method computation
Authors: Drobakhin O O , Olevskyi O V 
Published: December 2023

Abstract
Parametric spectral analysis methods such as the Prony’s method can estimate the frequencies and amplitudes of a signal, conforming to their model, with great precision. At the same time, the addition of noise to the signal can lead to a complete model breakdown which leads to erroneous parameter values. This is especially true for the impulse noise. The article explores several possible algorithms which can be applied to the Prony’s method in order to refine the results and make them more noise resistant. Such algorithms include signal segmentation methods where the results of each segment processing influence the final estimate as well as the conceptually related method of point skipping. An approach based on the use of non-Euclidean norms as a measure of the linear algebraic equation system’s solution quality is developed and tested. Initially, the methods are applied to model digital signals, comprised of harmonic components with varying complex frequencies and amplitudes. Additive white Gaussian and impulse noise is added to the model signals. The results are then applied to the noisy results of a real-life synthetic aperture synthesis experiment obtained in the intermediate zone of radiation.
MATT’S PATROL: A Generalized framework to track marine litter path, fare and toll
Authors: Jao J R. , Vallar E A. , Jao J R. , Era M , Lañada M J 
Published: December 2023

Abstract
Attention is given to the mapping of marine litter pathways due to their negative impact on the environment, society, and economy. Many models have been created to examine ocean dynamics and particle tracking systems. This study aims to contribute to these existing models by introducing a framework called “MATT’S PATROLL: MArine liTTer’S PATh, faRe, and tOLL.” This framework examines three pillars needed for the management of marine litter, the computational, socio-ecological, and economic arms. The Lagrangian particle tracking model is used to model the spatio-temporal behavior of litters on the surface of the ocean. The “faRe” component describes the direct and indirect effects of meso-particles on sea and land populations while they wait to accumulate on shorelines and other settlements. The “tOLL” component examines the long-term ecological and socio-economic costs on ecosystems in land and water, as well as the damage and loss in gross revenue from the marine sector when marine litters penetrate habitats and livelihoods. To illustrate the framework, artificially generated litter data around Visayas region is used to simulate path, fare, and toll calculations.