bluuebunny/crossref_metadata_2025_split huggingface dataset:
Uniform and optimal error estimates of a nested Picard integrator for the nonlinear Schrödinger equation with wave operator
Authors: Cai Yongyong , Feng Yue , Guo Yichen , Xu Zhiguo 
Published: August 2024

AbstractWe propose a second‐order nested Picard iterative integrator sine pseudospectral (NPI‐SP) method for the nonlinear Schrödinger equation with wave operator (NLSW) involving a parameter and carry out rigorous error estimates. Actually, the equation propagates wave with wavelength in time, while the amplitude of the leading oscillation is for well‐prepared initial data, and for ill‐prepared initial data, respectively. Based on the exponential integrator and nested Picard iteration, the uniformly accurate (w.r.t. ) NPI‐SP scheme is proposed with the optimal uniform error bounds at in time and spectral accuracy in space for both well‐prepared and ill‐prepared data in ‐norm. This result significantly improves the error bounds of the finite difference methods and exponential wave integrator for the NLSW. Error estimates are rigorously carried out and numerical examples are provided to confirm the theoretical analysis.
Typical failure modes and corresponding repairing methods of woven lattice sandwich composites
Authors: Li Xiaofei , Shi Hougai , Bai Cuiping , Yan Qu , Wang Ben , Fan Hualin 
Published: August 2024

AbstractThe woven lattice sandwich composites (WLSCs) are susceptible to damage during service, which leads to a decline in their mechanical properties. Therefore, it is crucial to develop repair methods that specifically target the mechanical properties of WLSCs. In this study, repair techniques for the common types of skin and core damage in WLSCs were propose. The repair process begins with identifying the type of structural damage and removing the damaged section. Subsequently, the skin and core layers are repaired accordingly. The mechanical properties before and after repair are then compared through experimental evaluations. The results demonstrate that the carrying capacity of the repaired WLSCs is 85% higher than that of the original, unrepaired structure using the selected repair method.Highlights
Typical damage modes of woven lattice sandwich composites were classified.
Repairing methods are proposed for woven lattice panels based on damage modes.
Core‐foaming and skin patch adhering perfectly rehabilitate the damaged sandwich.
Bearing capacity of the repaired sandwich slightly surpasses its original structure.
Automatic assessment of the fatigue life of cables of cable‐stayed bridges by on‐line monitoring
Authors: Xu Bin , Wu Zirao , Casas Joan R. , Dan Danhui 
Published: August 2024

AbstractTo accurately and timely evaluate the long‐term performance of cables in cable‐stayed bridges, an automatic perception technology scheme by on‐line monitoring of cable vibrations is proposed for the fatigue damage evaluation of in‐service cables. In the fatigue‐stress amplitude of cables, the stress produced by tension changes caused by external actions like traffic, wind, and temperature is the main component. When cables vibrate significantly, the stress caused by changes in cable vibration‐induced additional stress should not be neglected. Besides axial stress, bending stress is also significant in cable fatigue damage analysis. To make cable fatigue life prediction closer to real engineering scenarios, this factor should be considered. First, based on the cable dynamic stiffness theory, a method is proposed for the automatic gathering of the actual full‐stress time history of a cable by on‐line vibration monitoring. Furthermore, based on Miner's linear fatigue damage accumulation theory, an automatic fatigue life assessment method is proposed and applied to the vibration monitoring data of cables on an operational bridge. The results indicate that the proposed technology realizes automatic on‐line monitoring of cable forces and fatigue assessment of cables. Through statistical analysis of cable fatigue stress amplitude, it was determined that in cable‐stayed bridges, compared to long cables, short cables are more sensitive to external variable loads, typically experiencing larger and more frequent tension changes, and are more prone to fatigue. Therefore, short cables should be given more attention when analyzing cable fatigue in cable‐stayed bridges.
Chebyshev–Ritz and Navier's methods for hygro‐magneto vibration of Euler–Bernoulli nanobeam resting on Winkler–Pasternak elastic foundation
Authors: Jena Subrat Kumar , Pradyumna S. , Chakraverty S. , Eltaher Mohamed A. 
Published: August 2024

AbstractThis research employs Chebyshev–Ritz method along with Navier's method to investigate the vibration characteristics of a nanobeam subject to a longitudinal magnetic field and linear hygroscopic environment. The nanobeam is characterized by a Winkler–Pasternak elastic foundation and follows the nonlocal Euler–Bernoulli beam theory. The governing equation of motion is derived using Hamilton's principle, and non‐dimensional frequency parameters are computed for Simply Supported‐Simply Supported (SS), Clamped‐Clamped (CC), and Clamped‐Free (CF) boundary conditions. The motivation behind this study is to provide a comprehensive and efficient analytical framework for understanding the dynamic behavior of nanobeams in complex environments. By investigating the influence of magnetic and hygroscopic factors on the vibration characteristics of nanobeams, this research aims to offer valuable insights for the design and optimization of nanoscale structures. Employing shifted Chebyshev polynomials as shape functions in Chebyshev–Ritz method offers several advantages in the proposed model. Firstly, these polynomials possess orthogonal properties, which can significantly enhance computational efficiency. The orthogonality of shifted Chebyshev polynomials allow for simpler and more streamlined numerical computations compared to non‐orthogonal basis functions. Additionally, the orthogonality ensures that the resulting system of equations is well‐conditioned, even for higher‐order polynomial approximations. A closed‐form solution for SS boundary condition is obtained through Navier's method. Convergence analysis is performed to validate the accuracy and effectiveness of the proposed model against existing models. The non‐dimensional frequency parameters obtained using both Navier's method and Chebyshev–Ritz method demonstrate strong agreement, further validating the proposed nanobeam model. Additionally, a comprehensive parametric study evaluates the impact of various characteristics, including the small‐scale parameter, Winkler modulus, shear modulus, magnetic parameter, and hygroscopic parameter. The findings contribute to a nuanced understanding of nanobeam vibrations under the influence of a magnetic field and hygroscopic environment, providing valuable insights for the design and optimization of nanoscale structures in practical applications.
Influence of heat source/sink on a rotating cone in a rotating nanofluid with magnetic field impact: Application of Hosoya polynomial‐based collocation method
Authors: Sharma Ram Prakash , Srilatha Pudhari , Prakash Om , Kumar R. S. Varun 
Published: August 2024

AbstractThe present analysis considers the angular velocities of the free flow and the arbitrarily fluctuating cone over time, leading to an unsteady stream over a rotating cone in a rotating nanofluid. The effects of heat source/sink and magnetic field on an unsteady flow past a rotating cone in a rotating nanoliquid are considered in this examination. The dimensional governing equations are transformed into nondimensional ordinary differential equations (ODEs) using the similarity variables. The nonlinear system of ODEs has been solved using the Hosoya polynomial‐based collocation method (HPBCM), and the obtained values are compared with the numerical method Runge Kutta Fehlberg's fourth‐fifth order (RKF‐45) scheme. The effects of numerous factors on the momentum and thermal distributions are shown graphically. Results reveal that the ratio of the cone angular velocity to the free stream angular velocity increases the velocity profile but converse trend is seen for the thermal profile. The upsurge in the values of the magnetic parameter intensifies the velocity profile. The rise in the values of the heat source/sink parameter upsurges the thermal profile. As the unsteady parameter increases temperature profile declines.
The Right Kind of Family, the Right Kind of Migrant: Welfare and Immigration in Poland Before and After the Populist Turn
Authors: Safuta Anna 
Published: August 2024

AbstractRight-wing populism in Central and Eastern Europe (CEE) uses welfare and migration policies to legitimize its illiberalism. This chapter examines welfare and immigration policies in Poland since 2005, when populists first came to power. The findings are based on 17 expert interviews and document analysis, and challenge the notion of a radical shift between liberal democracy and illiberal populism. In the welfare and immigration domains, illiberal populism is rather a reactionary intensification of prior ideological orientations. In line with the book’s focus on anti-gender and anti-migrant discourses, the chapter identifies bordering practices involved in illiberal populist welfare and migration policies. Deserving welfare subjects are those who can fulfil ‘nationalist familialist’ ideals establishing the heteropatriarchal family as the foundation of the nation. In the migration domain, illiberal populism distinguishes between desirable inflows from former Soviet countries (‘peripherally white’ migration) and unwanted non-white migrants. These insights are pertinent beyond CEE. They highlight how liberal market-oriented social policy lays the groundwork for populist self-positioning as welfare champions supporting the nation’s ‘real’ families. Additionally, the chapter shows that right-wing populism strategically opposes certain migrations while encouraging others.
The Action Repertoires of the International Organization for the Family—Transnationalizing Far-Right Family Politics
Authors: Koch Timo 
Published: August 2024

AbstractMigration and far-right social movement studies have explored exclusionary politics in different national contexts. These works have explained many of the factors contributing to the hostility against minorities on the grounds of religion, race, gender, and sexual identity. Employing the concept of intersectional bordering (Cassidy K, Yuval-Davis N, Wemyss G, Polit Geogr 66:139–141, 2018), the present analysis dissects how religious, conservative, and far-right organizations employ the concept of the family to promote exclusionary politics. To achieve this, the chapter focuses on the International Organization for the Family (IOF), one of the most prominent representatives of this emerging phenomenon (Kalm S, Meeuwisse A, Global Discourse 10:303–320, 2020). I outline three key discursive and mobilization strategies of the IOF: identity formation, the sharing of resources, and knowledge transfer. Analyzing the organization’s repertoires in Russia, Hungary, Moldova, and Germany, I show how transnational collective action is facilitated through the development of common mobilization strategies, the exchange of organizational resources, and online campaigns. The concept of the family thereby becomes an adaptable repertoire creating new exclusions through contentious politics.
Developable forming of high-strength corrugated sheet metal
Authors: Bhuva Jeet , Weiss Matthias , Rolfe Bernard , Jiao Jingsi , Paulino Mariana 
Published: August 2024

AbstractThe classical theory of folded developables suggests that curved crease folding can be applied to sheet metal of high strength to manufacture parts with complex geometries. However, its application has been limited to sheet metals with low strength and requires grooving or perforation of the material at the fold lines. Applying the geometrical concept otherwise remains unexplored despite its potential in sheet metal-intensive industries like automotive, transportation, and construction. The current study introduces a novel sheet metal forming technique called developable forming. The theory of folded developables is applied to design a die tool for flange drawing a developable-shaped steel sheet. A developable connection is produced from high-strength material without resorting to thickness accommodation techniques. Experimental findings establish that the novel process does not follow the premises of the theory of folded developables. New shape effects are observed and the terms curving and coning are introduced to describe these. Additionally, significant redundant strains are identified in the flange, highlighting the different deformation modes in the developable forming process. A higher formability is achieved for a material with limited uniaxial elongation highlighting the need for further investigation on the mechanisms involved in the novel process.
Hyper-policing the Homeless: Lived Experience and the Perils of Benevolent and Malevolent Policing
Authors: Anthony Thalia , Walsh Tamara , McNamara Luke , Quilter Julia 
Published: August 2024

Abstract
Drawing on interviews with 164 people experiencing homelessness across Australia, this article discusses the concept of hyper-policing to account for excessive police interventions. Hyper-policing is exhibited in the sheer numbers of police apprehensions of people experiencing homelessness (quantitative aspect) and the extreme use of force (qualitative aspect). By deploying Wacquant’s (Daedalus 139(3):74–90, 2010) notion of hyper-incarceration in “ghettos”, we reveal that policing homelessness in Australia creates a panopticon on the streets and a conveyor belt into the panopticon of prisons. The lived experience of homeless participants demonstrates that hyper-policing is characterised by casual and constant encounters that reinforce homeless peoples’ status as ‘urban outcasts’ (Wacquant Int J Urban Reg Res 17:366–383, 1993). With growing pressures on access to housing and the cost of living across Western capitalist societies, policing is likely to play an increasing role in managing the housing crisis fallout. Homeless participants contend that the antidote to hyper-policing is not better policing but the dilution of policing. A common refrain among participants was for the police to ‘leave us alone’—a strategy that does not seek help from community policing but instead seeks peace on the streets. We articulate how the voices of homeless participants furthers ‘defund the police’ and abolitionist thinking by drawing attention to the need for housing justice over policing interventions in either benevolent or malevolent forms.
Are Interactive Exhibits at a Science Center Cognitive Artifacts?
Authors: Trybulec Marcin , Iłowiecka-Tańska Ilona 
Published: August 2024

AbstractThe paper examines the semiotic and cognitive status of interactive exhibits at science centers, taking the Copernicus Science Center in Warsaw (CSC) as an example. Such science centers support bottom-up interactions, encouraging visitors to spontaneously explore the exhibits in various ways. We analyze one distinctive way of interaction, when young visitors ignore an exhibit’s instruction and use it as if it were a kind of a toy or machine to play with (this is particularly common with exhibits that are unfamiliar “open-ended objects”). Drawing on cognitive semiotics we describe this particular way of interacting with exhibits as the reality mode of experience, in which the user ignores an intended exhibit’s representational function. We consider whether such interactive objects can be framed as cognitive artifacts, given that standard conceptualizations of artifacts emphasize their representational function. How can we convincingly describe the process by which the cognitive function of an exhibit experienced in reality mode is constituted? In this paper we apply concept of ecological cognitive artifact and the idea of the enactive signification to these questions. We argue that exhibits experienced in reality mode do indeed perform cognitive functions, even in the absence of a representational relation. Our investigation provides insights into the cognitive functions of exhibits and contributes to the conceptualization of non-representational cognitive artifacts.
Affordances and Constraints to Implementing Project-Based STEM: A Case Study of Systemic School Change
Authors: Giamellaro Michael , Ewing Benjamin , Siegel Deborah 
Published: August 2024

Abstract
School change is difficult and is both leveraged and hindered by interactive influences within complex systems of social practice. Whole-school STEM (science, technology, engineering, and mathematics) is a growing trend with unique aspects of change required of educators. A qualitative case study was used to analyze educator perspectives of the affordances and constraints to implementing a project-based, STEM-focused curriculum across all grades and classes of a rural school district in the United States. Educator journals and interviews informed the case over the first 1.5 years of the initiative. Identified affordances and constraints to implementation were organized into six factors and one element. External, teacher, and curriculum factors were disproportionately described as affordances, while administration and district factors were disproportionately described as constraints to the initiative. Student elements and fixed factors were identified as balanced between affordances and constraints. STEM-specific implications of these findings are discussed.
A method to enhance the nonlinear magnetic plucking for vibration energy harvesters
Authors: Rosso Michele , Cuccurullo Simone , Perli Filippo Pietro , Maspero Federico , Corigliano Alberto , Ardito Raffaele 
Published: August 2024

AbstractIn this work, a technique to improve the magnetic plucking for frequency up-conversion in piezoelectric energy harvesters is presented. The technique involves shielded magnets with Neodymium-iron-boron alloy polarized in the opposite direction on a main magnet. The phenomenon is investigated both at the computational and at the experimental level. Subsequently, simulations on a mesoscale piezoelectric energy harvester are presented which demonstrate a gain of 17 times if the magnets are shielded in comparison with the classical plucking (i.e. without shielding). The technique finds useful applications and benefits in the field of low-speed and low-frequency vibration energy harvesting, as well as in actuation and sensing.
Decoupling social movements from modernity: a critical reappraisal of Charles Tilly’s theory on the origins of social movements
Authors: Ebbinghaus Mathis 
Published: August 2024

AbstractConventional wisdom situates the historical origins of social movements in the eighteenth and nineteenth centuries by attributing their emergence to the rise of democracy, capitalism, and the nation-state. In this article, I challenge this scholarly orthodoxy by presenting primary sources and historical scholarship that demonstrate how the German Peasants’ Revolt of 1524 and 1525 meets Charles Tilly’s criteria for a modern social movement. By challenging the standard narrative of social movements as a product of modernity, this article breaks with the dichotomy between modern and premodern social movements and encourages us to rethink the concept of social movements.
Navigating social debt and its link with technical debt in large-scale agile software development projects
Authors: Saeeda Hina , Ovais Ahmad Muhammad , Gustavsson Tomas 
Published: August 2024

AbstractAgile methodologies have emerged as transformative paradigms in the ever-evolving software development landscape, emphasizing iterative development, customer collaboration, and adaptability. As the scope and complexity of projects and organizations expand, applying agile principles within the context of Large-Scale Agile Development (LSAD) encounters distinctive challenges. The majority of challenges encountered in LSAD, technical and non-technical, are attributed to the accrual of social debt. However, a conspicuous gap remains in understanding and addressing social debt in LSAD. This study aims to fill this void by investigating social debt in LSAD through an in-depth industrial case study with a leading Nordic company specializing in telecommunications software and services and focusing on producing secure 5G network solutions. The study investigates the causes of LSAD’s social debt and examines its impacts on secure 5G telecom software development. By addressing these objectives, this research sheds light on a critical aspect of LSAD’s social debt, caused by 3C challenges(communication, coordination and collaboration), social confines challenges, community smells challenges, and organisational social challenges in the telecom sector that have been underrepresented in the existing literature.
Scientific understanding in biomedical research
Authors: Varga Somogy 
Published: August 2024

AbstractMotivated by a recent trend that advocates a reassessment of the aim of medical science and clinical practice, this paper investigates the epistemic aims of biomedical research. Drawing on contemporary discussions in epistemology and the philosophy of science, along with a recent study on scurvy, this paper (1) explores the concept of understanding as the aim of scientific inquiry and (2) establishes a framework that will guide the examination of its forms in biomedical research. Using the case of Tuberculosis (TB), (3) it is argued that grasping a mechanistic explanation is crucial for reaching a threshold of understanding at which we may speak of an objectual, biomedical understanding of TB.
Nonlinear dynamics in a public good game
Authors: Gori Luca , Sodini Mauro 
Published: August 2024

AbstractThe present work aims to study the problem of individual voluntary anonymous contributions to the financing of public goods in a dynamic setting. To do this, the article departs from a textbook model à la Naimzada and Tramontana (2010) augmented with public goods. The article studies how bounded rationality and dependence on agents’ past decisions combine with the problem of voluntary contributions. This favours the emergence of nonlinear dynamics in individual behaviour as well as in the aggregate contribution to the financing of a public good project. The Nash equilibrium can be destabilised through a flip bifurcation when the agent reactivity increases. In addition, some Neimark–Sacker bifurcations can also occur although not around the steady-state equilibrium. A sufficiently high agent reactivity level can also lead to chaotic dynamics with possible multiple attractors. When the chaotic regime prevails, synchronisation phenomena in agent behaviour may occur but are rare. Thus, usually, even if agents are homogeneous, they behave as if they were heterogeneous by making non-synchronised decisions. The work also explicitly deepens the case of a heterogeneous economy in terms of both consumer preferences and income.