bluuebunny/crossref_metadata_2025_split huggingface dataset:
Unveiling the energy transfer mechanism between aqueous colloidal NIR-II quantum dots and water
Authors: Yang Hongchao , Li Renfu , Sun Ziqiang , Zhang Yejun , Zhan Hongbing , Chen Xueyuan , Wang Qiangbin 
Published: July 2023

Hydrophilic semiconductor quantum dots (QDs) with emission in the second near-infrared window (NIR-II) have been widely studied in bioimaging applications. In such cases, QDs are usually dispersed in water. As is known, water has strong absorbance in the NIR-II region. However, investigations on the interaction between NIR-II emitters and water molecules are ignored in previous studies. Herein, we synthesized a series of mercaptoundecanoic acid-coated silver sulfide (Ag2S/MUA) QDs with various emissions that partially or completely overlapped with the absorbance of water at 1200 nm. By constructing a hydrophobic interface of cetyltrimethylammonium bromide (CTAB) with MUA on the Ag2S QDs surface via forming an ionic bond, significant enhancement of Ag2S QDs photoluminescence (PL) intensity was observed, as well as a prolonged lifetime. These findings suggest that there is an energy transfer between Ag2S QDs and water in addition to the classical resonance absorption. Transient absorption and fluorescence spectra results revealed that the increased PL intensities and lifetime of Ag2S QDs originated from the suppressed energy transfer from Ag2S QDs to the water due to the CTAB bridged hydrophobic interfaces. This discovery is important for a deeper understanding of the photophysical mechanisms of QDs and their applications.
On the bandgap underestimation of delafossite transparent conductive oxides CuMO2 (M = Al, Ga and In): Role of pseudopotentials
Authors: Shen Jiale , Liu Haitao , Li Yuanchang 
Published: July 2023

We report a first-principles study on the electronic and optical properties of delafossite CuMO2 (M = Al, Ga and In) using the recently developed hybrid functional pseudopotentials. We obtain trends of the fundamental and optical gaps with increasing M-atomic number, in agreement with experiment. In particular, we reproduce the experimental fundamental gap, optical gap, and Cu 3d energy of CuAlO2 almost perfectly, in contrast to the various calculations that have traditionally focused on valence electrons, which are unable to reproduce these key properties simultaneously. Since all that distinguishes our calculations is simply the use of a different Cu pseudopotential with a partially exact exchange interaction, this suggests that an inappropriate description of the electron–ion interaction may play a role in the density functional theory bandgap problem for CuAlO2. Applying Cu hybrid pseudopotentials to CuGaO2 and CuInO2 is also effective, yielding optical gaps that are very close to experiment. However, due to the limited experimental data for these two oxides, a comprehensive comparison as that for CuAlO2 is not possible. Furthermore, our calculations yield large exciton binding energies for delafossite CuMO2, all around 1 eV.
Low-energy argon ion bombardment-induced decomposition of physisorbed hydrofluorocarbons on silicon nitride surfaces: A computational mechanistic study
Authors: Cheng Erik S. , Hwang Gyeong S. 
Published: July 2023

Using a combination of tight binding molecular dynamics and ab initio molecular dynamics simulations, we study the mechanisms of bombardment-induced decomposition of hydrofluorocarbons (HFCs) physisorbed on silicon nitride for ion energies of ≤35 eV. We propose three key mechanisms by which bombardment-driven HFC decomposition can occur, focusing on the two pathways observed at these low ion energies: “direct decomposition” and “collision assisted surface reactions (CASRs).” Our simulation results clearly demonstrate the importance of the presence of favorable reaction coordinates for enabling CASR, which dominates at lower energies (≈11 eV). At higher energies, direct decomposition becomes more favored. Our work also predicts that the primary decomposition pathways for CH3F and CF4 are CH3F → CH3 + F and CF4 → CF2 + 2F, respectively. The fundamental details of these decomposition pathways and the decomposition products formed under ion bombardment have implications for plasma-enhanced atomic layer etching process design that will be discussed.
Millikan’s consistency testers and the cultural evolution of concepts
Authors: Shea Nicholas 
Published: July 2023

Abstract
Ruth Millikan has hypothesised that human cognition contains ‘consistency testers’. Consistency testers check
whether different judgements a thinker makes about the same subject matter agree or conflict. Millikan’s suggestion is that, where
the same concept has been applied to the world via two routes, and the two judgements that result are found to be inconsistent,
that makes the thinker less inclined to apply those concepts in those ways in the future.
If human cognition does indeed include such a capacity, its operation will be an important determinant of how
people use concepts. It will have a major impact on which concepts they deploy and which means of application (conceptions) they
rely on. Since consistency testers are a selection mechanism at the heart of conceptual thinking, they would be crucial to
understanding how concepts are selected – why some are retained and proliferate and others die out. Hence, whether consistency
testers for concepts exist, and how they operate, is an important question for those seeking to understand the cultural evolution
of concepts, and of the words we use to express them.
Zooming in on the notion of metaphoricity
Authors: Julich-Warpakowski Nina , Jensen Thomas Wiben 
Published: July 2023

Abstract
The present contribution addresses the notion of metaphoricity and discusses different positions in relation to this complex and multi-dimensional phenomenon. Generally, the notion of metaphoricity is used when metaphor is not considered a binary category anymore, or when the status of an expression as metaphorical is at stake (e.g. in discussions of metaphor identification). We will focus on the first understanding of metaphoricity as a scalar phenomenon. Despite the fact that the term is used more and more in the metaphor literature, it is often unclear what it actually entails, e.g. how metaphor is gradable. To shed light on this theoretical and methodological problem, in this paper we will discuss different notions of the term metaphoricity by illustrating how metaphoricity is understood and how it can be operationalized and studied.
Semantic distance predicts metaphoricity and creativity judgments in synesthetic metaphors
Authors: Winter Bodo , Strik-Lievers Francesca 
Published: July 2023

Abstract
This paper discusses a way of operationalizing metaphoricity quantitatively using a numerical measure of the semantic distance between two domains. We demonstrate the construct validity of this measure with respect to metaphoricity and creativity judgments in the domain of English synesthetic metaphors – expressions such as sweet melody and loud color that involve combinations of terms from conceptually distinct sensory modalities. In a pre-registered study, we find that a continuous measure of sensory modality difference predicts metaphoricity and creativity judgments. While our results use synesthetic metaphors as a test case, it is possible to extend the application of our measure of semantic distance to other metaphorical expressions. In addition to demonstrating the utility of this measure, this work also demonstrates the utility of rating data in the domain of metaphor research.
The semantics of a parallel reality
Authors: Di Biase-Dyson Camilla 
Published: July 2023

Abstract
This paper considers the use of figurative language when intangible or supernatural phenomena are described in language. The case studies are derived from texts written in Ancient Egyptian, an extinct Afroasiatic language (ca. 3200 bce–1300 ce). It is argued that a MIPVU-based analysis, otherwise very useful for interrogating all kinds of texts, even those from the ancient world, needs to be modified to account for the layers of meaning encountered in texts in which a deity is being described. A more nuanced approach, which considers the scalarity of metaphor and reconsiders the conceptual modelling of metaphorical language in a culturally sensitive way, is proposed. As such, the methods proposed here may be useful for scholars working on metaphor in texts with religious content.
Acquisition of estar + adjective in L2 Spanish by L1 French and Portuguese speakers
Authors: Guijarro-Fuentes Pedro , Amenós-Pons José , Ahern Aoife 
Published: July 2023

Abstract
This paper reports the developmental stages of the acquisition of estar in stage-level predicate
constructions in the L2 Spanish grammar of native speakers of French and Portuguese. Copular verbs exist in the L1s of both
learner groups; however, only in Portuguese is there an aspectual contrast, with copula selection conditions that partially differ
from those of ser and estar in Spanish. The study used data extracted from the Corpus de
Aprendices de Español (CAES), made up of written texts produced by L2 Spanish learners from CEFR A1 to C1 levels. We attempt to
analyse whether, and to what degree, these L2 learners are sensitive to estar copula restrictions in adjective
constructions. Our analysis of the written production of 143 L1 French speakers and 361 L1 Portuguese speakers showed differing
acquisitional patterns depending on the L1. We consider that the estar overextension, found in the learners’
productions, is related to the process of developing the ability to identify the specific features that distinguish the use of
copular verbs in the interlanguage of our learners. Our findings, thus, provide a more fine-grained description of the semantic
representation and access of interpretable features in L2 Spanish with special relevance to current hypotheses on Second Language
Acquisition such as the Feature Reassembly Hypothesis (Lardiere
2009).
Phonic mitigation markers for disagreement in interviews of university learners of Spanish as foreign language
Authors: Medina Soler María Isabel , Ainciburu María Cecilia 
Published: July 2023

Abstract
In previous studies of the mitigators that occur when a speaker wants to show disagreement with his or her interlocutor, morphosyntactic markers occupy the most relevant part. In oral communication, however, phonic markers play a central role. This research presents the analysis of these markers in a corpus of interviews with B1 level university exchange students (CEFR). The aim is to check for the presence of phonic attenuation markers when foreign students express a divergent opinion in Spanish from that expressed by the native speaker. The analysis leads to a categorization of these markers and attempts to provide empirical basis for a better understanding of the phonic markers in the academic interlanguage.
On the flow of perfect energy tensors
Authors: Sáez Juan Antonio , Mengual Salvador , Ferrando Joan Josep 
Published: July 2023

Abstract
The necessary and sufficient conditions are obtained for a unit time-like vector field u to be the unit velocity of a divergence-free perfect fluid energy tensor. This plainly kinematic description of a conservative perfect fluid requires considering eighteen classes defined by differential concomitants of u. For each of these classes, we get the additional constraints that label the flow of a conservative energy tensor, and we obtain the pairs of functions

{
ρ
,
p
}

, energy density and pressure, which complete a solution to the conservation equations.
A minimized electron cyclotron resonance ion thruster for China’s space-borne gravitational wave detection missions
Authors: Meng Sheng-Feng , Zhu Xi-Ming , Yu Da-Ren 
Published: July 2023

Abstract
Space-borne gravitational wave (GW) detection spacecraft works in the state of drag free for which a disturbance reduction system is utilized to offset the non-conservative force. The key actuator of drag-free control loop is a micro-thruster with the performance of a high precision thrust and wide-range operations. Ion thruster, such as electron cyclotron resonance ion thruster (ECRIT), is one of the options because its thrust can be controlled precisely by the method of beam current feedback. However, there is still a barrier for the conventional ECRIT to achieve the low thrust of 1 μN as required in space-borne GWs detection missions due to its radial structure. In this work, a minimized ECR ion thruster (mini-ECRIT) is designed by a new idea that it employs an axial ring-cusped field to exploit the low-pressure adaptability of resonance heating. The mini-ECRIT is tested and results in a dynamic thrust range of 1–100 μN, a resolution of 0.1 μN, a thrust noise of 0.1 μN/Hz1/2, and a response time of about 10 ms. In addition, the specific impulse of this thruster can reach as high as 510 s at low thrust 5 μN, being higher than that of previous ion thrusters by a factor of about 5, which may significantly reduce the propellant consumption. This minimized ECR ion thruster may support China’s space-borne GW detection missions such as TianQin.
Relativistic bulk viscous fluids of Burgers type and their presence in neutron stars
Authors: Gavassino L 
Published: July 2023

Abstract
It is well known that a mixture of two chemical components undergoing one chemical reaction is a bulk viscous fluid, where the bulk stress evolves according to the Israel-Stewart theory. Here, we show that a mixture of three independent chemical components undergoing two distinct chemical reactions can also be viewed as a bulk viscous fluid, whose bulk stress now is governed by a second-order differential equation which reproduces the Burgers model for viscoelasticity. This is a rigorous and physically motivated example of a fluid model where the viscous stress does not undergo simple Maxwell-Cattaneo relaxation, and can actually overshoot the Navier–Stokes stress. We show that, if one accounts for muons, neutron star matter is indeed a bulk viscous fluid of Burgers type.
Quantum causality in κ-Minkowski and related constraints
Authors: Franco Nicolas , Hersent Kilian , Maris Valentine , Wallet Jean-Christophe 
Published: July 2023

Abstract
We study quantum causal structures in

1
+
1

κ-Minkowski space-time described by a Lorentzian Spectral Triple whose Dirac operator is built from a natural set of twisted derivations of the κ-Poincaré algebra. We show that the Lorentzian Spectral Triple must be twisted to accommodate the twisted nature of the derivations. We exhibit various interesting classes of causal functions, including an analog of the light-cone coordinates. We show in particular that the existence of a causal propagation between two pure states, the quantum analogs of points, can exist provided quantum constraints, linking the momentum and the space coordinates, are satisfied. One of these constraints is a quantum analog of the speed of light limit.
Gravity theories with local energy-momentum exchange: a closer look at Rastall-like gravity
Authors: Vanzella Daniel A Turolla 
Published: July 2023

Abstract
Einstein’s famous equivalence principle is certainly one of the most striking features of the gravitational interaction. In a strict reading, it states that the effects of gravity can be made to disappear locally by a convenient choice of reference frame. As a consequence, no covariantly-defined net gravitational (point-wise) force should exist and energy-momentum of all matter and interaction fields combined, with gravity excluded, should be locally conserved. Although elegant, this represents a strong constraint on the dynamics of a gravitating system and it is only logical to question its naturality and observational basis. This is the purpose of the present work. For concreteness sake, we analyze, in the context of metric (torsion-free) theories of gravity, the simplest phenomenological model which allows for local energy-momentum exchange between the spacetime and matter/interaction fields while preserving the seemingly more natural principle of general covariance. This concrete model turns out to be a generalization of the socalled Rastall’s theory, with one important advantage: criticisms made to the latter, which are often used to dismiss it as a viable or interesting model, do not apply to the former in a Universe containing ‘dark’ ingredients, such as ours—a connection which seems to have been overlooked thus far. We conclude by exploring the consequences of our Rastall-like model to standard (astrophysical and cosmological) gravitational scenarios.
Polarization control of RABBITT in noble gas atoms
Authors: Kheifets Anatoli S , Xu Zhongtao 
Published: July 2023

Abstract
The mutual angle formed by the non-collinear polarization axes of two laser pulses is used to control two-photon extreme ultraviolet and infrared ionization of noble gas atoms in the process of reconstruction of attosecond bursts by beating of two-photon transitions (RABBITT). The magnitude and the phase of this beating can be controlled very efficiently by the mutual polarization angle. The mechanism of this control can be understood within the lowest order perturbation theory and the soft photon approximation. We offer a very sensitive test on the polarization control of the angular dependent RABBITT process which validates our numerical simulations. We apply this test to the recent theoretical and experimental results of polarization controlled RABBITT on hydrogen and helium by Boll et al (2023 Phys. Rev. A 107 043113) and heavier noble gases by Jiang et al (2022 Nat. Commun.
13 5072).
Two-dimensional Dirac phonons without/with inversion symmetry
Authors: Wang Chenyang , Yu Wei-Wang , Liu Ying , Zhang Xiaoming , Jin Lei , Liu Cong , Liu Guodong 
Published: July 2023

Abstract
In a recent study, two-dimensional Dirac phonons that are protected by nonsymmorphic symmetries in spinless systems were systematically investigated. However, the focus of this study was on the classification of Dirac phonons. To address the gap in the research on the topological features of 2D Dirac phonons based on their effective models, we classified the 2D Dirac phonons into two classes: without or with inversion symmetry, thereby clarifying the minimal symmetry requirements for enforcing 2D Dirac points. Based on symmetry analysis, we discovered that screw symmetries, together with time-reversal symmetry, play an essential role in the existence of Dirac points. To validate this result, we constructed the k·p model to describe the Dirac phonons and discussed their topological features accordingly. We found that a 2D Dirac point could be considered as a composition of two 2D Weyl points with opposite chirality. Furthermore, we provided two concrete materials to demonstrate our findings. Overall, our work provides a more detailed study of 2D Dirac points in spinless systems and clarifies their topological features.
Metamagnetic transition in the two f orbitals Kondo lattice model
Authors: Thomas Christopher , Burdin Sébastien , Lacroix Claudine 
Published: July 2023

Abstract
In this work, we study the effects of a transverse magnetic field in a Kondo lattice model with two f orbitals interacting with the conduction electrons. The f electrons that are present on the same site interact through Hund’s coupling, while on neighboring sites they interact through intersite exchange. We consider here that part of f electrons are localized (orbital 1) while another part (orbital 2) are delocalized, as it is frequent in uranium systems. Then, only electrons in the localized orbital 1 interact through exchange interaction with the neighboring ones, while electrons in orbital 2 are coupled with conduction electrons through a Kondo interaction. We obtain a solution where ferromagnetism and Kondo effect coexist for small values of an applied transverse magnetic field for

T
→
0

. Increasing the transverse field, two situations can be obtained when Kondo coupling vanishes: first, a metamagnetic transition occurs just before or at the same time of the fully polarized state, and second, a metamagnetic transition occurs when the spins are already pointing out along the magnetic field.
An optical non-contact flow-meter of conveyor belt based on FPGA
Authors: Du Hao , Wang Huifeng , Zhang Xiaowei , Guan Yueyuan , Shi Haonan , Song Shangzhen , Huang He 
Published: July 2023

Abstract
Aiming at the disadvantages of the existing conveyor belt flow monitoring, this research builds a conveyor belt optical dynamic flow-meter based on field programmable gate array (FPGA) by using FPGA image processing technology and the method of measuring material volume to measure the volume of conveyor belt material, which uses the principle of laser triangulation. The flow-meter takes FPGA as the core and drives two complementary metal oxide semiconductor (CMOS) cameras to collect light strips on material surface at the same time. Then, filter, binarization, center extraction and image stitching are performed on the collected light strips. Finally, the material volume is calculated by linear interpolation and Riemann sum. The image acquisition and processing of the flow-meter and the final volume calculation are implemented in the form of hardware in FPGA, the calibration and result display of system parameters is realized in the form of software in advanced RISC machine (ARM). It can be shown that the relative error of the volume measured by the flow-meter is less than 0.05 through experiment, and the material volume flow rate of the conveyor belt can be measured and displayed accurately in real-time, which makes up for the deficiency of the existing flowmeter. This system is of great significance for the informatization transformation of the conveyor belt and the realization of digital production and intelligent manufacturing.
Rolling bearing incipient fault feature extraction using impulse-enhanced sparse time-frequency representation
Authors: Zhu Hongxuan , Jiang Hongkai , Yao Renhe , Yang Qiao 
Published: July 2023

Abstract
Incipient faults features are often extremely weak and susceptible to heavy noise, making it challenging to obtain the concentrated faulty energy ridges in the time-frequency domain. Thus, a novel impulse-enhanced sparse time-frequency representation (IESTFR) method is proposed in this paper. First, the time-rearranged multisynchrosqueezing transform is utilized to produce a time-frequency representation (TFR) with a high energy concentration for faulty impulses. Next, a new non-convex penalty function is constructed by the hyperbolic tangent function, which can enhance the periodic impulsivity of sparse TFR for more obvious fault characteristic frequency. Moreover, the time-frequency transform is evaluated and compared by simulated signals and a selection strategy for the regularization parameter is designed. Simulated signals and two experimental signals are applied to verify the effectiveness of IESTFR, and the results show that IESTFR is effective and superior in bearing incipient fault feature extraction.