bluuebunny/crossref_metadata_2025_split huggingface dataset:
SU(N) fractional instantons and the Fibonacci sequence
Authors: Golán Jorge Dasilva , Pérez Margarita García 
Published: December 2022

Abstract
We study, by means of numerical methods, new SU(N) self-dual instanton solutions on R × T3 with fractional topological charge Q = 1/N. They are obtained on a box with twisted boundary conditions with a very particular choice of twist: both the number of colours and the ’t Hooft ZN fluxes piercing the box are taken within the Fibonacci sequence, i.e. N = Fn (the nth number in the series) and $$ \left|\overrightarrow{m}\right| $$

m
→

= $$ \left|\overrightarrow{k}\right| $$

k
→

= Fn−2. Various arguments based on previous works and in particular on ref. [1], indicate that this choice of twist avoids the breakdown of volume independence in the large N limit. These solutions become relevant on a Hamiltonian formulation of the gauge theory, where they represent vacuum-to-vacuum tunneling events lifting the degeneracy between electric flux sectors present in perturbation theory. We discuss the large N scaling properties of the solutions and evaluate various gauge invariant quantities like the action density or Wilson and Polyakov loop operators.
Dynamical Abelianization and anomalies in chiral gauge theories
Authors: Bolognesi Stefano , Konishi Kenichi , Luzio Andrea 
Published: December 2022

Abstract
We explore the idea that in some class of strongly-coupled chiral SU(N) gauge theories the infrared dynamics might be characterized by a bifermion condensate in the ad- joint representation of the color gauge group. As an illustration, in this work we revisit an SU(N) chiral gauge theory with Weyl fermions in a symmetric (ψ) and anti-antisymmetric (χ) tensor representations, together with eight fermions in the anti-fundamental representations (η), which we called ψχη model in the previous investigations. We study the infrared dynamics of this system more carefully, by assuming dynamical Abelianization, a phenomenon familiar from 𝒩 = 2 supersymmetric gauge theories, and by analyzing the way various continuous and discrete symmetries are realized at low energies. We submit then these ideas to a more stringent test, by taking into account some higher-form symmetries and the consequent mixed anomalies. A detailed analysis of the mixed anomalies involving certain 0-form U(1) symmetries and the color-flavor locked 1-form ℤN symmetry in the ψχη system shows that the proposed infrared dynamics is consistent with it.
Hidden mechanical joints of sheets to rods by axial sheet bending and unbending
Authors: Afonso Rafael M. , Alves Luís M. 
Published: December 2022

AbstractMechanical joints of sheets to rods by plastic deformation produced at room temperature away from the rod ends have been investigated in recent years but new developments are still needed. The process hereby presented relies in the axial bending of a sheet with a pre-drilled hole of smaller diameter than that of the rod, until the diameter of the sheet becomes equal to the initial diameter of the rod. Then, a rod is placed inside this larger hole diameter of the sheet and the sheet is unbent to its original shape, with its material being radially injected to a rectangular cross-section slot previously machined in the rod, thus producing a mechanical interlocking between the two geometries. The major process parameters are identified and their influence in the deformation mechanics is analysed by means of finite element modelling and experimentation. The experiments were carried out in unit cells while the numerical modelling analysed sheets of different lengths and thicknesses, so that to allow a proper understanding of the influence of different specifications on the new joining by forming process. Destructive performance tests were performed in the sheet-rod connections and comparisons with previous joining techniques were made to confirm the success of the new mechanical joint.
Affektive Mentalisierung als wahrgenommene Kontrollierbarkeit und Nützlichkeit von Emotionen
Authors: Biel Hannah Marie , Löwe Bernd , Briken Peer , Hennig Timo , Krott Nora Rebekka , Jungclaußen Ingo , Liebherz Sarah , Weigel Angelika , Reininger Klaus Michael 
Published: December 2022

Zusammenfassung
Hintergrund
Instrumente zur Untersuchung von Mentalisierung sollten die Multidimensionalität dieses Konstrukts berücksichtigen und spezifizieren. Indikativ für den Pol der affektiven Mentalisierung sind einerseits aufgrund des Verständnisses für eigene und fremde Emotionen eine wahrgenommene Kontrollierbarkeit von Emotionen, andererseits aufgrund der attribuierten Bedeutsamkeit eigener und fremder Emotionen eine wahrgenommene Nützlichkeit von Emotionen. Die wahrgenommene Kontrollierbarkeit und Nützlichkeit positiver und negativer Emotionen wird mit den 16 Items des englischsprachigen Emotion Beliefs Questionnaire (EBQ; Becerra et al. 2020) im Selbstbericht erfasst.

Ziel der Studie
Ziele der vorliegenden Studie waren es, eine deutschsprachige Version des EBQ als Erhebungsinstrument für affektive Mentalisierungsfähigkeit zu entwickeln sowie deren Reliabilität und Validität zu ermitteln.

Material und Methoden
Psychotherapeut:innen in Aus- und Weiterbildung sowie Studierende (n = 104) beantworteten den von uns in Anlehnung an die Translation Guidelines des European Social Survey übersetzten deutschsprachigen EBQ als Teil einer anonymen Online-Befragung. Wir führten eine explorative Faktorenanalyse durch und bestimmten interne Konsistenzen sowie konkurrente Validitäten in Bezug auf verwandte Konstrukte.

Ergebnisse
Wie in der Originalvalidierungsstudie zeigen sich eine dreifaktorielle Struktur des EBQ sowie eine gute interne Konsistenz von α = 0,87 in der Gesamtskala. Weiterhin zeigen sich Zusammenhänge zwischen der Wahrnehmung von positiven und negativen Emotionen als unkontrollierbar und nutzlos (hohe EBQ-Werte) und einer geringeren Emotionsregulation sowie höheren psychopathologischen Symptomen (konkurrente Validität).

Schlussfolgerung
Die Befunde decken sich mit den Ergebnissen der originalen Validierungsstudie und legen nahe, dass der EBQ auch in der deutschen Version zu empfehlen ist. Theoretisch begründet und empirisch überprüft (siehe Online-Appendix) erscheint der EBQ als ein geeignetes Verfahren zur Erhebung affektiver Mentalisierung.
System identification of photovoltaic system based on fractional-order model
Authors: Ebead Rabiaa , Abo-Zalam Belal , Nabil Essam 
Published: December 2022

AbstractA fractional-order model of a photovoltaic (PV) system is proposed in this paper. The system identification approach is used to develop an effective dynamical model for a PV system. A real PV module and a boost converter are used to gather the experimental input–output data for the identification process. The black box modeling is applied to the system identification to obtain the transfer function, without the requirement to perform any mathematical analysis. The identification process is based on the least squares criteria for minimizing model output error, and the Levenberg–Marquardt algorithm is used for optimizing the model parameters. The proposed fractional-order model (FOM) is investigated using MATLAB to study the frequency response and the model's stability. Simulation results verify the effectiveness and advantages of the FOM in comparison to identified integer-order model.
The making of sustainability: ideological strategies, the materiality of nature, and biomass use in the bioeconomy
Authors: Boyer Miriam , Kusche Franziska , Hackfort Sarah , Prause Louisa , Engelbrecht-Bock Friederike 
Published: December 2022

AbstractThe bioeconomy, a recent addition to the political project of ecological modernization, is largely premised on the widespread use of biomass. Biomass is presented by bioeconomy proponents as renewable and, therefore, sustainable. However, a large body of academic and non-academic literature questions this sustainability, citing the negative socio-ecological aspects of biomass use. Given this contradiction, we ask how the key institutions of the innovation system (government, science, and industry), construct and uphold the image of sustainability of biomass use in the bioeconomy. Through an analysis based on ideology critique, we look at the broad field of biomass policy in Germany, including official bioeconomy strategies and biomass potential calculations, expert portrayals of biomass use in the bioeconomy-themed Year of Science, and an iconic biomass-based commodity. We identify four central ideological strategies that uphold the image of sustainability and contribute to creating political consent for the political project of the German bioeconomy: seeking managerial solutions, relying on technological innovation, relegating solutions into the future, and obscuring the materiality of nature. We discuss how these strategies are upheld by the wider discourse and institutions of ecological modernization and argue that particular attention should be given to the biophysical materiality of living nature in this context. The materiality of nature represents both an obstacle to the ideological strategies identified, and a starting point for envisioning alternative society–nature relations.
A fixed point theorem and Ulam stability of a general linear functional equation in random normed spaces
Authors: Benzarouala Chaimaa , Brzdęk Janusz , Oubbi Lahbib 
Published: December 2022

AbstractWe prove a very general fixed point theorem in the space of functions taking values in a random normed space (RN-space). Next, we show several of its consequences and, among others, we present applications of it in proving Ulam stability results for the general inhomogeneous linear functional equation with several variables in the class of functions f mapping a vector space X into an RN-space. Particular cases of the equation are for instance the functional equations of Cauchy, Jensen, Jordan–von Neumann, Drygas, Fréchet, Popoviciu, the polynomials, the monomials, the p-Wright affine functions, and several others. We also show how to use the theorem to study the approximate eigenvalues and eigenvectors of some linear operators.
Application of Bio and Nature-Inspired Algorithms in Agricultural Engineering
Authors: Maraveas Chrysanthos , Asteris Panagiotis G. , Arvanitis Konstantinos G. , Bartzanas Thomas , Loukatos Dimitrios 
Published: December 2022

AbstractThe article reviewed the four major Bioinspired intelligent algorithms for agricultural applications, namely ecological, swarm-intelligence-based, ecology-based, and multi-objective algorithms. The key emphasis was placed on the variants of the swarm intelligence algorithms, namely the artificial bee colony (ABC), genetic algorithm, flower pollination algorithm (FPA), particle swarm, the ant colony, firefly algorithm, artificial fish swarm, and Krill herd algorithm because they had been widely employed in the agricultural sector. There was a broad consensus among scholars that certain BIAs' variants were more effective than others. For example, the Ant Colony Optimization Algorithm and genetic algorithm were best suited for farm machinery path optimization and pest detection, among other applications. On the contrary, the particle swarm algorithm was useful in determining the plant evapotranspiration rates, which predicted the water requirements and optimization of the irrigation process. Despite the promising applications, the adoption of hyper-heuristic algorithms in agriculture remained low. No universal algorithm could perform multiple functions in farms; different algorithms were designed to perform specific functions. Secondary concerns relate to data integrity and cyber security, considering the history of cyber-attacks on smart farms. Despite the concerns, the benefits associated with the BIAs outweighed the risks. On average, farmers can save 647–1866 L on fuel which is equivalent to US$734-851, with the use of GPS-guided systems. The accuracy of the BIAs mitigated the risk of errors in applying pesticides, fertilizers, irrigation, and crop monitoring for better yields.
Iodine Deficiency of Breastfeeding Mothers and Infants from 2012 to 2019 in Zhengzhou, China
Authors: Wang Xinyi , Liu Jianghua , Lu Weixia , Jia Weihua , Li Qingzhi , Traoré Stanislav S. , Lyu Quanjun 
Published: December 2022

Abstract
To investigate iodine status and characteristics of breastfeeding women and infants in Zhengzhou after the implementation of the new national standard of iodine in edible salt, so as to provide the basis for formulating prevention and control measures. Urine samples from 28,730 infants aged 0–2 years and 17,977 breastfeeding women who received preventive health care in 12 districts/cities of Zhengzhou from 2012 to 2019 were collected to measure urinary iodine concentration (UIC). A total of 350 pairs of unweaned infants and their mothers were included in this study. After the implementation of the new national standard of iodine in edible salt, the iodine deficiency of infants aged 0–2 years showed a trend of decreasing first and then increasing, but generally the iodine nutrition of infants aged 0–2 years was at the appropriate level in 8 years. There was a gradual decrease in iodine deficiency among breastfeeding women over an 8-year period. And the median UIC of breastfeeding women in 8 years was at iodine nutrition appropriate level. In addition, the UIC of breastfeeding mothers was positively associated with that of infants (r = 0.104, P = 0.004). After the implementation of the new national standard of iodine in edible salt, breastfeeding women and infants in Zhengzhou generally were at an appropriate level of iodine nutrition, and there was a significant positive correlation between the UIC of breastfeeding mothers and infants.
Spatially Varying Intergenerational Changes in the Prevalence of Female Genital Mutilation/Cutting in Nigeria: Lessons Learnt from a Recent Household Survey
Authors: Nnanatu Chibuzor Christopher , Fagbamigbe Adeniyi Francis , Afuecheta Emmanuel , Utazi Chigozie Edson 
Published: December 2022

Abstract
Considering the concerted investments in anti-female genital mutilation/cutting (FGM/C) campaigns championed by the Nigerian government and non-governmental organizations, research findings suggest that reduction in intergenerational (mother-to-daughter) prevalence of FGM/C in Nigeria has been very slow. What can we learn from the 2018 Nigerian Demographic and Health Survey (2018 NDHS) about the roles of the key drivers of mother-to-daughter FGM/C prevalence in Nigeria? Here, drawing upon the 2018 NDHS dataset, we provided a context-specific study on the geographical patterns and the enabling factors of intergenerational trends in FGM/C among Nigerian women aged 15 – 49 years and their daughters aged 0 – 14 years. Using Bayesian semi-parametric geo-additive regression model, we simultaneously controlled for the effects of individual-level, community-level and unobserved geographical factors. We learnt that although there has been an overall decline in mother-to-daughter prevalence of FGM/C, the practice persists in Nigeria largely due to geographical location and social norm related factors – risk was high among daughters of circumcised women and daughters of women who supported the continuation of FGM/C. We identified Kano, Kaduna, Imo and Bauchi states as the hotspots and there was an increased risk of FGM/C among daughters of women who lived in the neigbouring states of Jigawa and Yobe. Daughters of circumcised women were about 2.7 times more likely to be cut. We recommend the development of tailored community-level interventions targeting circumcised women in the hotspot states and their neighbours to ensure a total eradication of female circumcision in Nigeria by the year 2030.
Beneficial and negative factors for the development of students’ well-being in educational context
Authors: Stang-Rabrig Justine , Schwerter Jakob , Witmer Matthew , McElvany Nele 
Published: December 2022

AbstractStudents’ school-related well-being (SWB) is of vital importance. Nevertheless, it is unclear how SWB develops in late adolescence, especially among students in high-achieving environments and which factors are associated with it. Based on a longitudinal dataset (T1: Grade 11, T2: Grade 12), we analyzed how SWB (school satisfaction, academic self-concept, stress experience, exam anxiety, peer satisfaction) develops and whether psychological needs (autonomy, competence, relatedness) and achievement pressure from teachers and parents were related to the development. 1,286 students from high-achieving high schools (46.7% female, MageT1 = 16.40) answered sociodemographic questions and questions about key variables. From T1 to T2, particularly students’ stress experience and peer satisfaction declined. Need fulfilment and perceived achievement pressure was related to changes. Implications for research and practice are discussed.
Future self-imagery of young people in Sweden during the COVID-19 pandemic: an exploratory mixed methods analysis
Authors: Singh Laura , Rathbone Clare J , Moulds Michelle L. , Holmes Emily A. 
Published: December 2022

AbstractGlobal restrictions imposed during the COVID-19 pandemic significantly limited the capacity to plan for the future. Little is known about young people’s future self-images and the impact the COVID-19 pandemic may have had upon them. Given evidence that the ability to imagine a positive future can be protective for mental health, research into the impact of the pandemic on future self-imagery is needed. In two studies, we therefore explored the consequences of the COVID-19 pandemic for future self-imagery in an unselected sample of young people in Sweden, specifically: (a) how content and characteristics of future self-images changed from before to during the pandemic, and (b) how such change was related to trauma history, intrusive memories of COVID-19 media footage, past time perspective and optimism (assessed with questionnaires/intrusive memory diary). Future self-images before and during the pandemic were assessed using the ‘I Will Be’ task (NStudy1=74; NStudy2=99). A mixed methods design, combining quantitative analysis, qualitative content coding and thematic analysis was used. Exploratory results of Study 1 indicated that future images were rated as less positive during than before the pandemic and that this reduction was less pronounced in people with higher optimism. Results were replicated in an independent sample (Study 2, collected later during the pandemic). In conclusion, whilst the findings are preliminary and emerged from an unselected sample, they prompt the suggestion that brief, novel interventions which aim to bolster positive future imagery may hold promise as a scalable means by which to enhance mental health for young people in the context of the COVID-19 pandemic.
Comment on “Screening the Multi-element Content of Pleurotus Mushroom Species Using Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES)”
Authors: Falandysz Jerzy 
Published: December 2022

AbstractLa, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu are lanthanides, also referred to as “rare earth” elements (occurring at ultra-low concentration, i.e. each, at ppb or lower levels) in plant and animal foods including edible wild mushrooms. Could it be that lanthanides when collectively reported as a summed value (widely referred to as REE) are at relatively high concentrations because extremely high contributions from individual elements? REE elements naturally occur in environmental media such as the soil substrate in which plants and fungi grow in a characteristic pattern (Oddo-Harkins rule), with most of the available literature confirming the extension of this pattern in fungi. Abnormalities therefore need to be examined closely and resolved.
Economic policy statements, social media, and stock market uncertainty: An analysis of Donald Trump’s tweets
Authors: Ortiz Daniel Perico 
Published: December 2022

AbstractThis paper investigates the impact of economic policy communication via social media on stock market uncertainty. It uses a sample of Donald Trump’s tweets to identify and cluster policy-related tweets using a double machine learning approach based on natural language processing. The response of uncertainty to these tweets is then estimated using an event-study design. Tweets about foreign policy and trade, monetary policy, and immigration policy significantly increase market uncertainty as measured by the VIX. Independent of their content, also the frequency of tweets and the intensity of tweet sharing matter for stock market uncertainty. Most of the effects are transitory, reaching their peaks around two hours after the publication of tweets.
Sustaining BEST in CLASS: Teacher-Reported Evidence-Based Practice Use with Students at Risk for Emotional and Behavioral Disorders Amidst the COVID-19 Pandemic
Authors: Washington-Nortey Melissa , Granger Kristen , Sutherland Kevin S. , Conroy Maureen , Kaur Navneet , Hetrick Allyse 
Published: December 2022

AbstractThere is growing evidence of the efficacy of evidence-based interventions in improving the academic and social outcomes of children who exhibit challenging behaviors during program implementation periods. However, less is known about the extent to which practices learned as part of these interventions are sustained after these projects end, when funding is paused temporarily, and in less-than-ideal conditions. This study used qualitative methods to investigate whether teachers previously trained in the BEST in CLASS-Elementary intervention continued to use the program’s evidence-based practices with students 1–2 years after completing the program and in the context of the COVID-19 pandemic. It also examined teachers’ perceptions of the impact of practice use on students’ academic and social outcomes. Thirteen BEST in CLASS-Elementary teachers from elementary schools in two southeastern states in the USA where the program was implemented completed semi-structured interviews on the topic. Data were coded thematically, and the results indicated that over 50% of teachers reported using “rules,” “supportive relationships,” and “praise” frequently with their students. However, “precorrection” and “opportunities to respond” were reportedly used less often. Teachers also perceived that their use of these evidence-based practices was linked to increases in their students’ academic engagement and academic performance and knowledge, improvements in students’ behaviors, their relationships with teachers, and general comfort and self-confidence. The discussion highlights modality-specific patterns noted in the results that might influence sustainment and the implication of these findings for interventions and programs aimed at promoting positive behavioral outcomes for early elementary school students.