bluuebunny/crossref_metadata_2025_split huggingface dataset:
Exploring the effects of audience and strategies used by beauty vloggers on behavioural intention towards endorsed brands
Authors: Garg Mukta , Bakshi Apurva 
Published: May 2024

AbstractInfluencer marketing has become a potent and dynamic force in the digital age, changing the face of marketing in a variety of sectors. Even though social media influencers are still important in corporate communication strategies, there are still unresolved issues concerning what exactly makes an influencer powerful and how that influence impacts the behaviour of their followers. This research investigates the role of interactional elements used by beauty vloggers on the purchase intentions of consumers. In addition to the influence of beauty vloggers, there are inherent aspects that impact consumer purchasing behaviour. The present study also examines the impact of audience characteristics in forming consumer attitudes towards beauty vloggers that result in shaping favourable consumer behaviour. The study was carried out on individuals aged 16 to 45 years, who use social platforms regularly. Data obtained from 367 respondents from North India was analysed using structural equation modelling with the SmartPLS software. The outcome of the study demonstrates that interactional elements used by beauty vloggers impact the behaviour of consumers. The results also showed that perceived influence serves as a partial mediator in the relationship between interactional elements and consumers’ purchase intention. Moreover, findings indicate that when consumers hold favourable attitudes towards beauty vloggers, the impact of self-concept and personality congruence enhancement on consumer behaviour is amplified, showcasing the mediating role of consumer attitude. The study’s findings offer insights that can assist industrial marketers and cosmetic company practitioners in strategically selecting influencers to boost sales.
Design and experiment of multidimensional and subnanometer stage driven by spatially distributed piezoelectric ceramics
Authors: Zhang Fan , Huang Qiangxian , Zhang Chibin , Cheng Baolin , Cheng Rongjun , Zhang Liansheng , Li Hongli 
Published: May 2024

Multidimensional microdriving stage is one of the key components to realize precision driving and high-precision positioning. To meet nanometer displacement and positioning in the fields of micro-/nano-machining and precision testing, a new six-degree-of-freedom microdriving stage (6-DOF-MDS) of multilayer spatially distributed piezoelectric ceramic actuators (PZTs) is proposed and designed. The interior of the 6-DOF-MDS is a hollow design. The flexure hinge is used as the transmission mechanism, and the series–parallel hybrid driving of the corresponding PZTs achieves the microtranslation in the X, Y, and Z directions and the microrotation around the three axes of the microdriving stage, forming a microdisplacement mechanism with high rigidity and simple structure, which can realize the microfeed of 6-DOF. The force–displacement theory and lug boss structure optimization of the 6-DOF-MDS are analyzed, while the strength checking and natural frequency of the 6-DOF-MDS are also simulated by the finite element method. In addition, the real-time motion control system of the 6-DOF-MDS is designed based on Advanced RISC Machines. Through a series of verification experiments, the stroke and resolution results of the 6-DOF-MDS are obtained, where the displacements in the X, Y, and Z directions are 20.72, 20.02, and 37.60 μm, respectively. The resolution is better than 0.68 nm. The rotation angles around X, Y, and Z are 38.96″, 33.80″, and 27.87″, respectively, with an angular resolution of 0.063″. Relevant coupling experiments were also performed in this paper; in the full stroke linear running of X-axis, the maximum coupling displacements of the Y- and Z-axes are 1.04 and 0.17 μm, respectively, with the corresponding coupling rates of ∼5.0% and 0.8%. The maximum coupling angles for the X-, Y-, and Z-axes are 0.33″, 0.14″, and 2.30″, respectively. Considering the coupling of the 6-DOF-MDS, decoupling measures and specific mathematical models have also been proposed. The proposed multidimensional microdriving stage achieves subnanometer resolution and can be used for the precise positioning and attitude control of precision instruments at the nano-/subnanometer level.
Double harmonic mode-locking in soliton fiber ring laser acquired through the resonant optoacoustic coupling
Authors: Ribenek V. A. , Itrin P. A. , Korobko D. A. , Fotiadi A. A. 
Published: May 2024

Passive harmonic mode-locking of a soliton fiber laser locked to optoacoustic resonance (OAR) in the cavity fiber ensures high-frequency laser operation, high pulse stability, and low timing jitter. However, the pulse repetition rate (PRR) of such lasers is limited to ∼1 GHz for standard fibers due to the available acoustic modes. Here, we address these limitations by demonstrating a soliton fiber laser built from standard fiber components and subjected to double harmonic mode-locking (DHML). As an example, the laser adjusted to operate at the 15th harmonic of its cavity matching the OAR at ∼199 MHz could be driven to operate at a high harmonic of this particular OAR frequency, thus reaching ∼12 GHz. This breakthrough is made possible through controllable optoacoustic interactions in a short, 50 cm segment of unjacketed cavity fiber. We propose that the precise alignment of the laser cavity harmonic and fiber acoustic modes leads to a long-lived narrow-band acoustic vibration. This vibration sets the pace for the pulses circulating in the cavity by suppressing modes that do not conform to the Vernier principle. The surviving modes, equally spaced by the OAR frequency, in cooperation with the gain depletion and recovery mechanism, facilitate the formation of stable high-frequency pulse sequences, enabling DHML. In this process, the OAR rather than the laser cavity defines the elementary step for laser PRR tuning. Throughout the entire PRR tuning range, the soliton fiber laser exhibits enhanced stability, demonstrating supermode suppression levels better than ∼40 dB and picosecond pulse timing jitter.
Quantification of chirality based on electric toroidal monopole
Authors: Inda A. , Oiwa R. , Hayami S. , Yamamoto H. M. , Kusunose H. 
Published: May 2024

Chirality ubiquitously appears in nature; however, its quantification remains obscure owing to the lack of microscopic description at the quantum-mechanical level. We propose a way of evaluating chirality in terms of the electric toroidal monopole, a practical entity of time-reversal even pseudoscalar (parity-odd) objects reflecting relevant electronic wave functions. For this purpose, we analyze a twisted methane molecule at the quantum-mechanical level, showing that the electric toroidal monopoles become a quantitative indicator for chirality. In the twisted methane, we clarify that the handedness of chirality corresponds to the sign of the expectation value of the electric toroidal monopole and that the most important ingredient is the modulation of the spin-dependent imaginary hopping between the hydrogen atoms, while the relativistic spin–orbit coupling within the carbon atom is irrelevant for chirality.
HISOL: High-energy soliton dynamics enable ultrafast far-ultraviolet laser sources
Authors: Brahms Christian , Travers John C. 
Published: May 2024

Ultrafast laser sources in the far ultraviolet (100–300 nm) have been the subject of intense experimental efforts for several decades, driven primarily by the requirements of advanced experiments in ultrafast science. Resonant dispersive wave emission from high-energy laser pulses undergoing soliton self-compression in a gas-filled hollow capillary fiber promises to meet several of these requirements for the first time, most importantly by combining wide-ranging wavelength tuneability with the generation of extremely short pulses. In this Perspective, we give an overview of this approach to ultrafast far-ultraviolet sources, including its historical origin and underlying physical mechanism, the state of the art and current challenges, and our view of potential applications both within and beyond ultrafast science.
Facilitation for non-identical cognates in L3
Authors: Lijewska Agnieszka , de Louw Robertus 
Published: May 2024

AbstractIn the present study we aimed to obtain with trilinguals the cognate inhibitory effects reported earlier for bilingual speakers who performed L2 lexical decision tasks (LDTs) with non-identical cognates and controls. To that end, Polish–English–Dutch trilinguals performed two LDTs in their L3. In Experiment 1, the stimuli included two types of double non-identical cognates Polish–Dutch (e.g.,SMAK–SMAAK), and English–Dutch (e.g.,BUTTER–BOTER) as well as matched non-cognate Dutch controls (e.g.,JASJE). In Experiment 2, we tested triple non-identical cognates shared across Polish, English and Dutch (e.g.,GRUPA–GROUP–GROEP) and Dutch controls (e.g.,BROEK). We failed to find the bilingual inhibitory effects. In contrast, significant facilitation for English–Dutch and for Polish–English–Dutch cognates was found, even though no identical cognates were used. However, Polish–Dutch cognates yielded null results. The current findings emphasize the influence of the levels of form similarity on the observed cognate effects and point to the important role of stimulus list composition in cognate processing.
Introducing regression discontinuity design to applied linguistics
Authors: Sasaki Miyuki , Higuchi Yuki , Nakamuro Makiko , Roever Carsten , Yashima Tomoko 
Published: May 2024

Abstract
This report presents regression discontinuity design (RDD) as a powerful analytical tool for use in applied
linguistics showcased through our study of the impact of Japanese government study-abroad (SA) scholarships. RDD enables the
estimation of causal effects in scenarios where a true experiment is not feasible by exploiting a naturally occurring cutoff point
for treatment assignment. Because RDD may be novel to most readers in applied linguistics, this report provides a detailed
step-by-step explanation of the standard RDD procedures our study exemplifies. The results section is crafted to reflect the
conventional presentation style of RDD findings. Furthermore, the report’s concluding segment suggests scenarios within SA-related
language learning research that could benefit from RDD application by enhancing the nuanced and precise interpretation of data in
applied linguistics contexts.
Signing songs and the openings of semiotic repertoires
Authors: Snoddon Kristin 
Published: May 2024

AbstractThis paper presents an interpretative interview study that explores a song signer’s motivations and language ideologies as they emerge in translanguaging between languages and modalities. In signing songs, the limitations and proficiencies of deaf artists’ and audience members’ particular linguistic and semiotic repertoires come to the fore. The artist mediates between the affordances of the asymmetrically shared visual and auditory channels, as well as across music, song lyrics, and sign language. In so doing, they produce a distinctive text whose appreciation may expose the partial and asymmetric repertoires of audience members, as well as the limitations of the text itself in crossing borders. These limitations and asymmetries render song signing an ethical event because the ethical possibilities of communication emerge in its fallibility.
Asymptotic symmetries of gravity in the gauge PDE approach
Authors: Grigoriev Maxim , Markov Mikhail 
Published: May 2024

Abstract
We propose a framework to study local gauge theories on manifolds with boundaries and their asymptotic symmetries, which is based on representing them as so-called gauge PDEs. These objects extend the conventional BV-AKSZ sigma-models to the case of not necessarily topological and diffeomorphism invariant systems and are known to behave well when restricted to submanifolds and boundaries. We introduce the notion of gauge PDE with boundaries, which takes into account generic boundary conditions, and apply the framework to asymptotically flat gravity. In so doing, we start with a suitable representation of gravity as a gauge PDE with boundaries, which implements the Penrose description of asymptotically simple spacetimes. We then derive the minimal model of the gauge PDE induced on the boundary and observe that it provides the Cartan (frame-like) description of a (curved) conformal Carollian structure on the boundary. Furthermore, imposing a version of the familiar boundary conditions in the induced boundary gauge PDE, leads immediately to the conventional Bondi–Metzner–Sachs algebra of asymptotic symmetries. Finally, we briefly sketch the construction for asymptotically (A)dS gravity.
Deflection of light by a Reissner–Nordström black hole and Painlevé VI equation
Authors: Sasaki Tadashi 
Published: May 2024

Abstract
We consider the bending angle of the trajectory of a photon incident from and deflected to infinity around a Reissner–Nordström black hole. We treat the bending angle as a function of the squared reciprocal of the impact parameter and the squared electric charge of the background normalized by the mass of the black hole. It is shown that the bending angle satisfies a system of two inhomogeneous linear partial differential equations with polynomial coefficients. This system can be understood as an isomonodromic deformation of the inhomogeneous Picard–Fuchs equation satisfied by the bending angle in the Schwarzschild spacetime, where the deformation parameter is identified as the background electric charge. Furthermore, the integrability condition for these equations is found to be a specific type of the Painlevé VI equation that allows an algebraic solution. We solve the differential equations both at the weak and strong deflection limits. In the weak deflection limit, the bending angle is expressed as a power series expansion in terms of the squared reciprocal of the impact parameter and we obtain the explicit full-order expression for the coefficients. In the strong deflection limit, we obtain the asymptotic form of the bending angle that consists of the divergent logarithmic term and the finite O(1) term supplemented by linear recurrence relations which enable us to straightforwardly derive higher order coefficients. In deriving these results, the isomonodromic property of the differential equations plays an important role. Lastly, we briefly discuss the applicability of our method to other types of spacetimes such as a spinning black hole.
Asymptotically safe cosmology with non-canonical scalar field
Authors: Mandal Rituparna , Sanyal Soma 
Published: May 2024

Abstract
We investigate the quantum modified cosmological dynamical equations in a Friedmann–Lemaître–Robertson–Walker universe filled with a barotropic fluid and a general non-canonical scalar field characterized by a Lagrangian similar to k-essence model but with a potential term. Quantum corrections are incorporated by considering the running of the gravitational and potential couplings, employing the functional renormalization group approach. Covariant conservation of the non-canonical scalar field and the background barotropic fluid is considered separately, imposing a constraint resulting from the Bianchi identity. This constraint determines the evolution of the cut-off scale with the scale factor and also reveals the cosmic fixed points, depending on whether the flow ceases or continues to evolve. We explore how the general non-canonical scalar field parameter affects the different types of cosmic fixed points and how it differs from the canonical case. Furthermore, we establish a bound on the ratio of the renormalization group parameters involving the non-canonical parameter for which the universe may exhibit accelerated expansion for mixed fixed points. This bound indicates the non-canonical scalar field includes larger sets of asymptotically safe renormalization group fixed point which may give rise to an accelerated universe.
A mechanical model for polar curves
Authors: Motta L , Dutra R , Pereira L , Faria A , Silveira M V , Santos A C F 
Published: May 2024

Abstract
In this work we discuss the feasibility of the well-known classical polar curves (limaçons, roses and logarithmic spirals), studied in calculus courses, to emerge naturally as trajectories of a mass-spring system, limited to moving along a passing axis that rotates in uniform circular motion with controlled angular velocity. Simulations using the free software Modellus visually show how the appearance of polar curves is closely related to the initial conditions of the problem. A discussion about the physical reality of more general orbits, with multiple return points, is presented considering the attractive and repulsive character of the central force field promoted by the elastic force present in the system considered.
Orbital angular momentum modes in dielectrically chiral-core fibers
Authors: Dirbeba Gebeyehu , Li Junqing , Cao Yusheng , Liu Xingguang , Zhao Rui , Zhang Yingjie , Kalwe Johnston 
Published: May 2024

Abstract
In this paper, we investigate a dielectrically chiral-core fiber for the generation of orbital angular momentum (OAM) modes. We observe that the presence of chirality induces a modal index split between the same order OAM modes with opposite topological charges and arbitrary phase front rotation directions, which are originally degenerate in achiral fibers. This split indicates the existence of circular birefringence (CB) associated with a dielectric chirality. The modal cutoff splitting results in a single polarization property without the possibility of coupling between the same order modes that correspond to a single +l or −l OAM mode guiding. However, neither of the two fundamental modes guided by the chiral fiber exhibits a cutoff, despite having different modal indices due to chirality. Upon fraction of modal power cutoff, the high-order modes in the core region display different cutoff fractions of modal power between the same order modes, while the fundamental mode has no cutoff fraction of modal power. Due to CB and different fractions of modal power in the core for different handed OAM modes, dielectrically chiral fibers have potential applications in chiral sensing, circular polarization-dependent OAM mode filters, and new kinds of OAM mode generators.
Symmetry breaking in 2D materials for optimizing second-harmonic generation
Authors: Tuan Hung Nguyen , Nguyen Thanh , Van Thanh Vuong , Wang Sake , Saito Riichiro , Li Mingda 
Published: May 2024

Abstract
Second-harmonic generation (SHG) is the generation of 2ω (or half wavelength) light from incident light with frequency ω as a nonlinear optical response of the material. Three-dimensional (3D) SHG materials are widely investigated for developing laser technology to obtain shorter wavelengths in photolithography fabrication of semiconductor devices and the medical sciences, such as for imaging techniques that do not use fluorescent materials. However, to obtain the optimized SHG intensity, the 3D material is required to have no spatial-inversion symmetry (or non-centrosymmetry) and special crystal structure (or so-called phase-matched condition). Recently, engineering symmetry breaking of thin two-dimensional (2D) materials whose 3D structure has the inversion symmetry can offer a breakthrough to enhance the SHG intensity without requiring the phase-matched condition. Over the past decade, many 2D SHG materials have been synthesized to have broken inversion symmetry by stacking heterostructures, twisted moiré structures, dislocated nanoplates, spiral nanosheets, antiferromagnetic order, and strain. In this review, we focus on the recent progress in breaking inversion and rotational symmetries in out-of-plane and/or in-plane directions. The theoretical calculations and experimental setup are briefly introduced for the non-linear optical response of the 2D materials. We also present our perspectives on how these can optimize the SHG of the 2D materials.
Magnetic compensation in sputtered ferrimagnetic Mn

4
−
x

Ga
x
N thin films
Authors: Prendeville L , Jiménez-Cavero P , Naden A , He Yangkun , Rode K , Gercsi Z , Coey J M D 
Published: May 2024

Abstract
Fully compensated ferrimagnets are attracting increasing attention for spintronics. Here we report a series of Mn

4
−
x

Ga
x
N ferrimagnetic thin films grown on (100)-oriented MgO by magnetron sputtering. A small tetragonal distortion with

c

/

a

= 0.99 leads to perpendicular magnetic anisotropy with a [001] easy axis. The magnetisation decreases with increasing Ga content up to x = 0.18, where the magnetic moment is close to zero at room temperature. It increases with further increase of x, indicating the magnetic compensation composition has been crossed and the dominant sublattice has switched from Mn on the corner sites, where it is progressively replaced by nonmagnetic Ga, to noncollinear Mn on the face-centered sites. Compensation found at 235 K in a remanent scan of the x = 0.18 film is confirmed by measurements of the anomalous Hall effect and interpolation of the inverse coercivity. This work establishes the conditions for thin film growth of Mn

4
−
x

Ga
x
N that could be used for room-temperature ferrimagnetic spintronics. The behaviour of thin films is compared with that of bulk material.
Formation of an extended defect cluster in cuprous oxide
Authors: Aggarwal Garima , Chawla Sushobhita , Singh Akhilender Jeet , Alampara Nawaf , Monder Dayadeep S , Balasubramaniam K R 
Published: May 2024

Abstract
Intrinsic defects and defect clusters play an important role in the room-temperature transport of cuprous oxide. Neutralization of these defects by doping and/or modifying the synthesis process is essential to improve the room-temperature hole mobility in cuprous oxide. Toward this end, we annealed polycrystalline cuprous oxide under Cu-rich conditions, which led to the neutralization of the intrinsic acceptor defect. The concentration of both the acceptor defects (

V

Cu

and

V

Cu

split

) that are already present, reduces by four to five orders of magnitude. This is in accordance with the amount of possible Cu incorporation under different annealing conditions, indicating the backfilling of a large fraction of the Cu vacancies. Unforeseeably, the experimental conditions lead to the creation of yet another higher-order extended defect (3

V

Cu

+ 2Cu

i

) with a defect level at ≈0.5 eV above the valence band. The formation of such a defect is also indirectly suggested by the analysis of carrier concentration vs. temperature data and first-principles calculations. Such singly ionized higher-order defects with a possibly higher capture cross-section act as more effective traps resulting in reduced hole mobility.
Synergies and applications of polyimides featured low permittivity and high thermal conductivity
Authors: Dong Xiaodi , Zha Jun-Wei 
Published: May 2024

Abstract
The continuous upgrading of electronic technology has facilitated the integration and miniaturization of electronic and electrical equipment, as well as putting great pressure on the multifunctional demand for internal materials. Developing insulating materials with both low permittivity and high thermal conductivity has become imperative. This perspective focuses on polyimide (PI), which is the top material of the polymer material pyramid, discusses the characteristic parameters that affect its dielectric property and thermal conductivity. A series of basic schemes to regulate the dielectric/thermal properties of PI are summarized, revealing the bottlenecks and drawbacks of the current research. Future development trends of PIs featured low permittivity-high thermal conductivity are anticipated, and novel ideas are proposed for the development of new generation of multifunctional PIs.