bluuebunny/crossref_metadata_2025_split huggingface dataset:
A novel approach for remaining useful life prediction of high‐reliability equipment based on long short‐term memory and multi‐head self‐attention mechanism
Authors: Al‐Dahidi Sameer , Rashed Mohammad , Abu‐Shams Mohammad , Mellal Mohamed Arezki , Alrbai Mohammad , Ramadan Saleem , Zio Enrico 
Published: September 2023

AbstractAccurate prediction of the Remaining Useful Life (RUL) of components and systems is crucial for avoiding an unscheduled shutdown of production by planning maintenance interventions effectively in advance. For high‐reliability equipment, few complete‐run‐to‐failure trajectories may be available in practice. This constitutes a technical challenge for data‐driven techniques for estimating the RUL. This paper proposes a novel data‐driven approach for fault prognostics using the Long‐Short Term Memory (LSTM) model combined with the Multi‐Head Self‐Attention (MHSA) mechanism. The former is applied to the input signals, whereas the latter is used to extract features from the LSTM hidden states, benefiting from the information from all hidden states rather than utilizing that of the final hidden state only. The proposed approach is characterized by its capability to recognize long‐term dependencies while extracting features in both global and local contexts. This enables the approach to provide accurate RUL estimates in various stages of the equipment's life. The proposed approach is applied to an artificial case study simulated to mimic the realistic degradation behaviour of a heterogeneous fleet of aluminium electrolytic capacitors used in the automotive industry (under variable operating and environmental conditions). Results indicate that the proposed approach can provide accurate RUL estimates for high‐reliability equipment compared to four benchmark models from the literature.
Green and Simple Synthesis of a Nonflammable and Broad‐Spectrum Adsorbent for Uranyl and Other Metal Ions
Authors: Zhang Lijun , Li Yu , Zhao Haitao , Xu Xiang , Cheng Jiannan , He Weiwei , Zhang Lifen , Cheng Zhenping 
Published: September 2023

AbstractAdsorption is an effective technology widely used in the removal of radioactive and other heavy metal ions, the adsorbent plays critical role and development of novel adsorbents is being in urgent demand. In this work, phytic acid (PA)‐modified melamine sponge (MS) adsorbent MS@PDA@PA is prepared conveniently in green solvent water. A wide spectrum of metal ions including radioactive uranyl and transition heavy metal ions can be effectively adsorbed by the MS@PDA@PA due to non‐selectivity of phosphoric acid groups in PA. Different factors including pH of aqueous solution, contact time, and initial concentration of ions on the effect of adsorption of the resultant materials are investigated in detail, and the maximum adsorption capacities for U(VI), Pb(II), Cu(II), Cr(III) are 166.7, 168.5, 114.3, and 101.0 mg g−1 respectively at 298 K. It is notable that the MS@PDA@PA is nonflammable due to employment of MS as frame material, and the thermal stability is even improved after incorporation of PA, greatly reduce the risk of the adsorbent in the processes of storage and usage. The green yet simple synthesis and fire resistance of MS@PDA@PA make it a competitive material for practical treatment of wastewater consisting of toxic metal ions.
Health risk assessment of lead‐zinc mine tailing in Angoran, Zanjan, Iran
Authors: Akhavan Ahmad , Golchin Ahmad 
Published: September 2023

AbstractComprehending the characteristics of heavy metal contamination within mine tailings and its ramifications on ecological and human well‐being holds paramount importance in formulating effective preventive and ameliorative strategies. This investigation evaluates the health hazards posed by the tailings originating from the Angoran lead‐zinc mine situated in Zanjan province, Iran. The mine generates two distinct types of tailings: hot filter cake (referred to as cobalt cake or S2) and cold filter cake (nickel cake or S1). Twenty subsamples were procured from each type of tailing and subjected to analysis at the pollution research laboratory of University of Zanjan. The quantification of lead (Pb), zinc (Zn), arsenic (As), cadmium (Cd), nickel (Ni), copper (Cu), chromium (Cr), mercury (Hg), manganese (Mn), and antimony (Sb) concentrations was accomplished through the utilization of inductively coupled plasma mass spectrometry (ICP‐MS). Carcinogenic and non‐carcinogenic risk assessment indices were computed. Moreover, the limits of detection (LOD) and quantification (LOQ) for the measurements were established using blank solutions prepared as samples for assessment. The Hazard Index (HI) surpassed unity for Pb, Zn, Cd, As, Hg, and Mn in both types of tailings, signifying non‐carcinogenic risk exposure for both children and adults. Furthermore, the HI for Pb and As also exceeded unity for adults. Consequently, both age groups were subject to non‐carcinogenic hazards, with children encountering notably elevated risks. The chief pathways for exposure to heavy metals and the ensuing non‐carcinogenic risks encompassed ingestion, inhalation, and dermal contact. The cumulative risk threshold for carcinogenic outcomes, in accordance with USEPA standards, ranged between 1.00E‐04 and 1.00E‐06. In this inquiry, the overall risk for children associated with tailing S1 and S2 amounted to 2.39E‐03 and 5.00E‐03, respectively, markedly surpassing the acceptable threshold. Furthermore, the cumulative risk for adults pertaining to tailing S1 and S2 stood at 1.27E‐03 and 4.68E‐03, respectively, indicating the presence of carcinogenic perils in the adult demographic.
Bifurcations of streamlines in peristaltic flow without lubrication approximation: A case study
Authors: Rasool Husnain , Ali Nasir , Ullah Kaleem 
Published: September 2023

AbstractBifurcations of streamlines in peristaltic flow through a channel are investigated without lubrication approximation, that is, when the inertial and streamline curvature effects are present. The stream function for the considered flow is first established and then utilized to locate the stagnation/ equilibrium points. The classification of equilibrium points is made by employing the theory of dynamical systems. It is observed that the inertial effects modify the location and number of equilibrium points and hence give rise to additional bifurcations. This research focuses on the alterations in the topology of flow within a pump when there is partial occlusion. The insights gained from this research could be beneficial in guaranteeing the smooth flow of fluids through the pump with no risk of entrapment from entry to exit. Moreover, if trapping does occur, this information can be helpful in identifying the exact region within the pump where the fluid is being trapped.
Critical analysis of generalized Newtonian fluid flow past a non‐linearly stretched curved surface: A numerical solution for Carreau model
Authors: Ali Nasir , Khan Muhammad Waris Saeed , Saleem Shahzad 
Published: September 2023

AbstractThe underlying intention of the present work is to elaborate the boundary layer flow of Carreau fluid over a non‐linear stretching curved surface. Firstly, we derived the equation of motion for a two‐dimensional curved surface using the Carreau constitutive relation. Employing the well‐known approximations of the boundary layer theory (order of magnitude analysis), the terms of higher and next order have been neglected. We developed an appropriate similarity transformation that reduced the considered partial differential equation into an ordinary differential equation (self‐similar formulation). The MATLAB built‐in function usually known as bvp5c is utilized to get the numerical solution of the considered problem. The impact of the power‐law index (n), Weissenberg number and curvature parameter (k) on velocity profile and skin friction are analyzed through several graphs and tables. The obtained results are also verified by employing the shooting method through Maple software. The results reveal that both boundary layer thickness and velocity profile increase by enlarging the dimensionless curvature parameter of the curved surface.
Introduction: Spatializing Language Studies in the Linguistic Landscape
Authors: Malinowski David , Maxim Hiram H. , Dubreil Sébastien 
Published: September 2023

AbstractAs the assemblage of visible, audible, and otherwise textualized languages of public space, the linguistic landscape forms a rich context for understanding how material and environmental affordances affect language learning, and how language teachers can bring their L2 curricula to life. Whether it is within the four walls of a school, in a nearby neighborhood, or in virtual telecollaborative environments, the chapters of this volume illustrate how such diverse configurations of space lend themselves to language and literacy learning, while also contributing to learners’ critical cultural and historical awareness. Before inviting the reader to the volume’s nine chapters, this introduction outlines the history and significance of “space” in language teaching and learning research, a topic of significant interest and innovation in L2 education today. It then offers a framework for the spatialization of language teaching, that is, a pedagogy that is linguistically and culturally complex, geographically situated, historically informed, dialogically realized, and socially engaged. Whether one endeavors to teach in a traditional classroom, or immersed in the sights and sounds of outdoor spaces, or even from one's desktop at home, language teaching with the linguistic landscape is evaluated for its potential to extend the human, symbolic, and critical dimensions of L2 learning.
Exploring Language and Culture in the Novice Chinese Classroom Through the Linguistic Landscape
Authors: Yu Fei , Moeller Aleidine J. , Lu Jia 
Published: September 2023

AbstractIn this chapter, we showcase a field trip project developed and tested in a two-week Chinese immersion summer program to demonstrate how using the theoretical framework of social constructivism in combination with linguistic landscape (LL) offers novice language learners the opportunity to explore the Chinese language and culture in an authentic context. This project was designed to motivate and engage learners actively in acquiring language skills and cultural knowledge and understanding. We examine pedagogical approaches and potential benefits of using technology and LL as pedagogical resources in language education to promote learner engagement in the target language and culture in a community based context.
A Collaborative Asset Mapping Approach to the Linguistic Landscape: Learning from the community’s Linguistic Capital in an L2 College-Writing Course
Authors: Ruvalcaba Christian , Aguilera Michelle 
Published: September 2023

AbstractThe Language Capital Project is a collaborative linguistic asset-mapping project that identifies non-residential locations in Tucson, Arizona, where languages other than English are present. This chapter introduces the project and theoretically situates it as LL research with a sociolinguistic justice approach. Through this approach, LL research is done alongside the language community members themselves, drawing from their knowledge and lived experience. This leads to a more complete understanding of the linguistic landscape, particularly minoritized community spaces, and it challenges homogenous, monolingual narratives of the southwest. After introducing the methods and outcomes of the project, the chapter presents an exploratory pilot case study of two undergraduate L2, first-year writing students who participated in the project as part of an extra credit assignment. This exploratory pilot case study showed that the students who participated in the project reported having had a positive experience as well as shifts in roles and transformational identity experiences.
Multilingual Linguistic Landscapes of New York City as a Pedagogical Tool in a Psychology Classroom
Authors: Sekerina Irina A. , Brooks Patricia J. 
Published: September 2023

AbstractThe chapter describes the utilization of Linguistic Landscapes (LL) as a pedagogical tool in an undergraduate research methods course in psychology and demonstrates how studying urban multilingualism can be harnessed in the service of five comprehensive learning goals of the American Psychological Association Guidelines for the Undergraduate Psychology Major (American Psychological Association, APA guidelines for the undergraduate psychology major. Retrieved from http://www.apa.org/ed/precollege/about/undergraduate-major.aspx, 2013). Fourteen students in their second year of college took a seminar titled Science and Technology in New York City with the theme of urban multilingualism, where they investigated how and why languages other than English are used in public signage in ethnic neighborhoods of New York City. Students were assigned to five groups; three groups had members with prior exposure to a second language (Spanish, Russian, Hebrew) to conduct the project, whereas the other two groups recruited bilingual friends to assist them (Greek, Chinese). The groups visited five ethnic neighborhoods in New York City and took photographs of 267 bilingual public signs. They collected responses to a small-scale survey (6–10 questions) or interviewed local bilingual residents. Students categorized signs, analyzed survey and interview responses, contributed to a class poster, and wrote a group research report in APA-format and an individual reflections essay. This course is an example of how LL can be used to promote an international perspective on psychology by exploring immigration and cultural diversity.
Einleitung
Authors: Lenk Alexander 
Published: September 2023

ZusammenfassungIn wissenssoziologischer Lesart geht es bei der Luhmannschen „Beobachtung zweiter Ordnung“ um eine Kritik des Wissens, die vor den Praktiken der Generierung von wissenschaftlichem Wissen nicht Halt macht. Als Kritik des Wissens wird die soziologische Aufklärung anderer gleichzeitig zu einer kritischen Selbstreflexion. Vor diesem Hintergrund lässt sich die Forschung über akademische Subjektivierung als schmale Gratwanderung zwischen methodischem Voyeurismus und einem selbstreferenziellen Erkenntnisstreben begreifen.
Methodologische Fundierung: Dispositivanalyse
Authors: Lenk Alexander 
Published: September 2023

ZusammenfassungDie Ansätze eines gouvernementalen Dispositivs und der Soziologie des individuellen Widerstands werden nun durch eine methologische Fundierung für die Analyse von akademischer Subjektivierung fruchtbar gemacht, denn bisher wurden nur erkenntnis-theoretische Grundlagen sowie begrifflich-theoretische Bestandteile der Forschungsperspektiven vorgestellt. Die methodologischen Vorgaben sowie die methodisch-praktischen Instrumente der skizzierten Perspektiven blieben bisher weitestgehend offen und werden im Folgenden beleuchtet.
Das Zusammenspiel von Subjektivierungsformen des Managementdiskurses und akademischen Subjektivierungsweisen
Authors: Lenk Alexander 
Published: September 2023

ZusammenfassungDie folgende Befragtenübersicht, die mithilfe einer Onlineumfrage während der Fallstudie an der FU Berlin generiert wurde, dient als Einstieg in die Analyse kollektiver Deutungsmuster und akademischer Subjektivierungsweisen.
Combination Therapy-Based Adaptive Control for Organism Using Medicine Dosage Regulation Mechanism
Authors: Sun Jiayue , Xu Shun , Liu Yang , Zhang Huaguang 
Published: September 2023

AbstractIn this chapter, the optimal control strategy for organism is investigated by using adaptive dynamic programming (ADP) method under the architecture of nonzero-sum games (NZSGs). Firstly, a tumor model is established to formulate the interaction relationships among normal cells, tumor cells, endothelial cells and the concentrations of drugs. Then, the ADP-based method of single-critic network architecture is proposed to approximate the coupled Hamilton-Jacobi equations (HJEs) under the medicine dosage regulation mechanism (MDRM). According to game theory, the approximate MDRM-based optimal strategy can be derived, which is of great practical significance. Owing to the proposed mechanism, the dosages of the chemotherapy and anti-angiogenic drugs can be regulated timely and necessarily. Furthermore, the stability of the closed-loop system with the obtained strategy is analyzed via Lyapunov theory. Finally, a simulation experiment is conducted to verify the effectiveness of the proposed method.
$$ \mathcal{PT} $$ breaking and RG flows between multicritical Yang-Lee fixed points
Authors: Lencsés Máté , Miscioscia Alessio , Mussardo Giuseppe , Takács Gábor 
Published: September 2023

Abstract
We study a novel class of Renormalization Group flows which connect multicritical versions of the two-dimensional Yang-Lee edge singularity described by the conformal minimal models $$ \mathcal{M} $$
M
(2, 2n + 3). The absence in these models of an order parameter implies that the flows towards and between Yang-Lee edge singularities are all related to the spontaneous breaking of $$ \mathcal{PT} $$
PT
symmetry and comprise a pattern of flows in the space of $$ \mathcal{PT} $$
PT
symmetric theories consistent with the c-theorem and the counting of relevant directions. Additionally, we find that while in a part of the phase diagram the domains of unbroken and broken $$ \mathcal{PT} $$
PT
symmetry are separated by critical manifolds of class $$ \mathcal{M} $$
M
(2, 2n + 3), other parts of the boundary between the two domains are not critical.
Non-isometric codes for the black hole interior from fundamental and effective dynamics
Authors: DeWolfe Oliver , Higginbotham Kenneth 
Published: September 2023

Abstract
We introduce a new holographic map for encoding black hole interiors by including both fundamental and effective dynamics. This holographic map is constructed by evolving a state in the effective, semiclassical gravity description of the interior backwards in time to pull the degrees of freedom outside the black hole, before evolving forwards in time in the fundamental description. We show this “backwards-forwards” map is equivalent to a post-selection map of the type introduced by Akers, Engelhardt, Harlow, Penington, and Vardhan, and in the case of trivial effective interactions reduces to their model, while providing a suitable generalization when those interactions are nontrivial. We show the map is equivariant with respect to time evolution, and independent of any interactions outside the black hole. This construction includes interactions with an infaller in a way that preserves the unitarity of black hole evolution exactly and does not allow for superpolynomial computational complexity.
A tale of N cones
Authors: Bourget Antoine , Grimminger Julius F. , Hanany Amihay , Kalveks Rudolph , Sperling Marcus , Zhong Zhenghao 
Published: September 2023

Abstract
We study particular families of bad 3d $$ \mathcal{N} $$
N
= 4 quiver gauge theories, whose Higgs branches consist of many cones. We show the role of a novel brane configuration in realizing the Higgs moduli for each distinct cone. Through brane constructions, magnetic quivers, Hasse diagrams, and Hilbert series computations we study the intricate structure of the classical Higgs branches. These Higgs branches are both non-normal (since they consist of multiple cones) and non-reduced (due to the presence of nilpotent operators in the chiral ring). Applying the principle of inversion to the classical Higgs branch Hasse diagrams, we conjecture the quantum Coulomb branch Hasse diagrams. These Coulomb branches have several most singular loci, corresponding to the several cones in the Higgs branch. We propose the Hasse diagrams of the full quantum moduli spaces of our theories. The quivers we study can be taken to be 5d effective gauge theories living on brane webs. Their infinite coupling theories have Higgs branches which also consist of multiple cones. Some of these cones have decorated magnetic quivers, whose 3d Coulomb branches remain elusive.
Surface defects in the O(N) model
Authors: Trépanier Maxime 
Published: September 2023

Abstract
I study the two-dimensional defects of the d dimensional critical O(N) model and the defect RG flows between them. By combining the ϵ-expansion around d = 4 and d = 6 as well as large N techniques, I find new conformal defects and examine their behavior across dimensions and at various N. I discuss how some of these fixed points relate to the known ordinary, special and extraordinary transitions in the 3d theory, as well as examine the presence of new symmetry breaking fixed points preserving an O(p) × O(N − p) subgroup of O(N) for N ≤ Nc (with the estimate Nc = 6). I characterise these fixed points by obtaining their conformal anomaly coefficients, their 1-point functions and comment on the calculation of their string potential. These results establish surface operators as a viable approach to the characterisation of interface critical phenomena in the 3d critical O(N) model.
Lipschitz-Free Spaces over Cantor Sets and Approximation Properties
Authors: Talimdjioski Filip 
Published: September 2023

AbstractLet $$K=2^\mathbb {N}$$

K
=

2
N

be the Cantor set, let $$\mathcal {M}$$
M
be the set of all metrics d on K that give its usual (product) topology, and equip $$\mathcal {M}$$
M
with the topology of uniform convergence, where the metrics are regarded as functions on $$K^2$$

K
2

. We prove that the set of metrics $$d\in \mathcal {M}$$

d
∈
M

for which the Lipschitz-free space $$\mathcal {F}(K,d)$$

F
(
K
,
d
)

has the metric approximation property is a residual $$F_{\sigma \delta }$$

F

σ
δ

set in $$\mathcal {M}$$
M
, and that the set of metrics $$d\in \mathcal {M}$$

d
∈
M

for which $$\mathcal {F}(K,d)$$

F
(
K
,
d
)

fails the approximation property is a dense meager set in $$\mathcal {M}$$
M
. This answers a question posed by G. Godefroy.