bluuebunny/crossref_metadata_2025_split huggingface dataset:
Atomic scale defect formation and phase transformation in Si implanted β-Ga2O3
Authors: Huang Hsien-Lien , Chae Christopher , Johnson Jared M. , Senckowski Alexander , Sharma Shivam , Singisetti Uttam , Wong Man Hoi , Hwang Jinwoo 
Published: June 2023

Atomic scale details of the formation of point defects and their evolution to phase transformation in silicon (Si) implanted β-Ga2O3 were studied using high resolution scanning transmission electron microscopy (STEM). The effect of Si implantation and the formation of defects was studied as a function of the dose of implanted atoms, and the detailed mechanism of lattice recovery was observed using both in situ and ex situ annealing of the implanted β-Ga2O3. The implantation created nanoscale dark spots in STEM images, which we identified as local γ-Ga2O3 inclusions generated by the relaxation of lattice due to ⟨010⟩ screw dislocations created by the implantation. The number and size of γ-Ga2O3 regions increased as the Si dose increased, and eventually the γ-Ga2O3 crystal phase (with stacking defects) took over the entire implanted volume when the peak Si concentration was over ∼1020 cm−3. Annealing above 1100 °C disintegrates the local γ-Ga2O3 phase and returns the structure to defect-free, single crystal β phase, likely indicating that point defects (such as Si interstitials and cation vacancies) are spatially redistributed by the annealing. However, when the structure is completely transformed to γ-Ga2O3 by the implantation, post-annealing leaves a high concentration of dislocations within the β phase, which relates to the inhomogeneous distribution of Si atoms detected by secondary ion mass spectrometry.
Pressure-induced physical properties of alkali metal chlorides Rb2NbCl6: A density functional theory study
Authors: Ali Md. Lokman , Billah Md. Marof , Khan Mithun , Nobin Md. Nadim Mahamud , Rahaman Md. Zahidur 
Published: June 2023

Using density functional theory-based first-principles simulations, detailed physical properties of the tetragonal phase alkali metal halide Rb2NbCl6 under pressure were explored for the first time. The structural, mechanical, and thermodynamic stability were confirmed by the Born stability requirements and the negative values for the formation energy. The analysis of Pugh’s and Poisson’s ratios and Cauchy’s pressure reveals that Rb2NbCl6 is ductile under the pressures in consideration. As the applied pressure rises, the elastic moduli show a rising trend, which indicates that Rb2NbCl6 stiffens up. According to several anisotropy indices, the compound is noticeably anisotropic both in ambient and under pressure. The machinability index suggests that the material under study is highly machinable. Several mechanical features of Rb2NbCl6 are analyzed according to the results of elastic constants and adequately explained. Since the melting temperature rises with applied pressure, Rb2NbCl6 is more suitable for high-temperature applications. The computed total density of states (TDOS) at 0 GPa pressure at EF is ∼5.07 states/eV/f.u., and applied pressure has a negligible effect on the value of DOS. The study of electronic properties provides significant support for interpreting the optical function. As the applied pressure rises, the reflectivity and absorption spectra shift to higher energy regions. High-reflectivity spectra suggest that the material would be an excellent choice for coatings that lower solar heating. The authors of this study expect that the fascinating findings of this investigation will give researchers and engineers a helpful foundation.
Comparing narratives on carnivore management in a dryland ecosystem: a case study of state-backed lethal control
Authors: Taylor Joshua , Núñez Paula , Gáspero Pablo , Pooley Simon , Fernandez-Arhex Valeria 
Published: June 2023

Lethal control of native carnivores as a principal management strategy can have unforseen ecological consequences and is often of questionable efficacy. Using as a case study a region where the lethal control of native puma and culpeo foxes has been incentivised via legislation for over 50 years, we examined how this policy has affected institutional narratives in the region. We conducted four key informant interviews with members of relevant institutions to establish their perspectives on carnivore management. We also examined the informational basis for the current legislative approach to predation, and identified topics for discussion surrounding legislation and its formation for decision-makers in the province. We identified a duality where two branches of gove rnment have contradictory policies regarding livestock production and carnivore management. All institutions involved in predation management in rural landscapes produced narratives supporting sustainable development, and suggested, in varying degrees, that alternatives to lethal control would be positive. Interviewees stated that modification of the existing laws require livestock producers to demand a change from policy-makers, who generally view carnivores poorly. Furthermore, there is evidence that discussions surrounding management strategies suffer from cultural bias, with rural inhabitants finding themselves marginalised from the decision-making process. We identified a need for empathy regarding the adverse situation of rural inhabitants facing the impacts of predation, and an appreciation of the role that carnivores play within their environments, so as to change the negative discourse surrounding human–carnivore interactions.
‘It’s like I have this weird superpower’: experiences of detectable and undetectable viral load among a cohort of recently diagnosed people living with HIV
Authors: Wells Nathanael , Philpot Steven , Murphy Dean , Ellard Jeanne , Howard Chris , Prestage Garrett 
Published: June 2023

Background By reducing HIV viral load to undetectable levels, HIV treatment slows disease progression and eliminates the possibility of sexual transmission. The promotion of undetectable viral load has also been accompanied by expectations of reducing HIV-related stigma, including self-stigma. Drawing on accounts of people recently diagnosed with HIV, we explored experiences of both detectable and undetectable viral load. Methods Between January 2019 and November 2021, semi-structured interviews were conducted with 35 people living with HIV (PLHIV) who had received an HIV diagnosis in Australia from 2016 onward. Of these participants, 24 completed follow-up interviews approximately 12 months later. Interviews were transcribed verbatim, entered into NVivo (software v12), and thematically analysed. Results Reflecting on the period in which their viral load was detectable, some participants described feeling ‘dirty,’ ‘viral,’ and ‘a risk’ to sexual partners. During this period, some participants minimised or ceased having sex, sometimes despite being in ongoing romantic relationships. Reaching undetectable viral load was commonly characterised as an important goal in HIV care and signalled a marker of good health and enabled a return to sexual relationships. However, the psychosocial benefits of undetectable viral load were not universally experienced, with some participants highlighting ongoing challenges of living with HIV long term. Conclusions Increasing awareness of the benefits of undetectable viral load is an important and powerful tool for improving the health and wellbeing of PLHIV; however, the period in which one’s HIV viral load is detectable can be challenging, particularly as feelings of being ‘unclean’ and ‘a risk’ may be internalised. Ensuring PLHIV are appropriately supported during periods of viral detectability is necessary.
Effects of language background and directionality on raters’ assessments of spoken-language interpreting
Authors: Han Chao , Hu Juan , Deng Yi 
Published: June 2023

Abstract
Bilingual raters play an important role in assessing spoken-language interpreting (between X and Y languages). Presumably, raters with X being the dominant language (DL) and Y the less DL can potentially differ, in terms of rating processes, from other raters with Y being the DL and X the less DL, when assessing either X-to-Y or Y-to-X interpreting. As such, raters’ language background and its interaction with interpreting directionality may influence assessment outcomes. However, this complex interaction and its effects on assessment have not been investigated. We therefore conducted the current experiment to explore how raters’ language background and interpreting directionality would affect assessment of English-Chinese, two-way interpreting. Our analyses of the quantitative data indicate that, when assessing interpreting into raters’ mother tongue or DL, they displayed a greater level of self-confidence and self-consistency, but rated performance more harshly. Such statistically significant group-level disparities led to different assessment outcomes, as pass and fail rates varied, depending on the rater group. These quantitative findings, coupled with the raters’ qualitative comments, may have implications for selection and training of bilingual raters for interpreting assessment.
Text as haunt
Authors: Washbourne Kelly , Cruz-Martes Camelly 
Published: June 2023

Abstract
The spectral in translation may be considered an opportunity for opening, and the textual haunting that results, a
way of conceiving of other-inhabitedness. Texts, translations, authors and translators have long been framed in the discourse of
hauntedness as a way of coming to terms with their complex subjectivities. A hauntological approach to translation allows for an
engagement with the presence-in-absence of a ‘source,’ the translational disjunctures of time and space, the return of the
traumatic and the repressed, and the promise of alterity. We posit three potential components of translational spectrality: (1)
translation and trauma; (2) haunted texts and readings, including acts of translation; and (3) the spectral author and translator.
The figure of the ghost confronts that of the autonomous author, at the same time giving voice to the (dis)embodied translator and
attendant invisibilities of their status.
Statistical ensembles and logarithmic corrections to black hole entropy
Authors: Ghosh Aritra 
Published: June 2023

Abstract
In this paper, we consider general statistical ensembles and compute logarithmic corrections to the microcanonical entropy resulting due to thermodynamic fluctuations which are controlled by the boundary conditions, i.e. due to choice of ensemble. The framework is applied to the case of non-extremal black holes to give certain logarithmic corrections to the Bekenstein–Hawking entropy. We argue that within the framework of black hole chemistry, where the cosmological constant is identified with bulk pressure, the isoenthalpic-isobaric entropy rather than microcanonical entropy carries a more natural and consistent thermodynamic interpretation as black hole entropy. Logarithmic corrections to both microcanonical and isoenthalpic-isobaric entropies of black holes are computed, and we show that the latter set of corrections in black hole chemistry are of the same form as corrections to the microcanonical entropy in theories where the cosmological constant is not interpreted as a thermodynamic pressure. Finally, we compute logarithmic corrections to entropy in the framework of holographic black hole chemistry. We emphasize upon the choice of statistical ensemble, both in the bulk and on the boundary, in order to have a consistent comparison between them. The corrections studied in this paper are distinct from those obtained from Euclidean quantum gravity.
Resolution guarantees for the reconstruction of inclusions in linear elasticity based on monotonicity methods
Authors: Eberle-Blick Sarah , Harrach Bastian 
Published: June 2023

Abstract
We deal with the reconstruction of inclusions in elastic bodies based on monotonicity methods and construct conditions under which a resolution for a given partition can be achieved. These conditions take into account the background error as well as the measurement noise. We want to highlight that we consider Lamé parameters that are either both smaller or larger than the background Lamé parameters. Both those cases are investigated for standard and linearized monotonicity tests resulting in four different algorithms and the corresponding resolution guarantees.
Understanding the effect of SiC/epoxy coating on surface flashover under DC voltage: from surface charge accumulation
Authors: Han Pu , Pan Zijun , Mao Shiyi , Ye Yuhan , Tang Ju , Pan Cheng 
Published: June 2023

Abstract
Charge accumulation at the insulator surface significantly alters the electric field distribution under DC voltage and can lead to unpredictable flashover. It is realized that the surface flashover voltage is reliant on the charge distribution approaching flashover occurrence (CDAFO). A method of how to judge the moment approaching flashover was proposed in this study to clarify how surface charges induced flashover, whereby the dynamic distributions of surface charges, including the CDAFO, were obtained from the instant of voltage application to the moment approaching flashover. The resulting flashover was analyzed with regards to insulators coated in SiC/epoxy, including an examination of the dominant charging pathway during voltage rising and a discussion of the relationship between the CDAFO and flashover voltage. Despite voltage polarities and SiC content, a reversal of charge polarity from hetero-polar to homo-polar was observed during voltage rising. Furthermore, it was discovered that the CDAFO was homo-charge accumulation, and an increase in SiC content resulted in greater homo-charges. A theory outlining homo-charge’s enhancement of flashover voltage by weakening the electric field near the high voltage electrode was also proposed. Consequently, because of the improved effect of homo-charges on flashover voltage, the addition of SiC led to the boost of flashover voltage.
Topological invariant of multilayer Haldane models with irregular stackings
Authors: Wu Xi 
Published: June 2023

Abstract
We study multilayer Haldane models with irregular type of stacking. Considering the nearest interlayer hopping, we prove that the value of the topological invariant is equal to the number of layers times the value of the topological invariant of monolayer Haldane model for irregular stacking(except AA), and interlayer hoppings do not induce direct gap closing or phase transitions. However, if the next-to-nearest hopping is taken into account, phase transitions can occur.
End block dynamics in unentangled polymers by dielectric spectroscopy
Authors: Wu Mengchun , Bichler Karin J , Jakobi Bruno , Grzesiowski Alyssa , Schneider Gerald J 
Published: June 2023

Abstract
Dielectric spectroscopy measures the dynamics of polymer melts over a broad frequency range. Developing a theory for the spectral shape can extend the analysis of dielectric spectra beyond determining relaxation times from the peak maxima and adds physical meaning to shape parameters determined with empirical fit functions. Toward this goal, we use the experimental results on unentangled poly(isoprene), and unentangled poly(butylene oxide), polymer melts, to test whether the concept of end blocks could be one reason for the Rouse model deviating from experimental data. These end blocks have been suggested by simulations and neutron spin echo spectroscopy and are a consequence of the monomeric friction coefficient depending on the position of the bead in the chain. The concept of an end block is an approximation which partitions the chain in a middle and two end blocks to avoid overparameterization by a continuous position dependent change of the friction parameter. Analysis of dielectric spectra shows that the deviations of the calculated from the experimental normal mode cannot be related to the end block relaxation. However, the results do not contradict an end block hiding below the segmental relaxation peak. It seems that the results are compatible with an end block being the specific part of the sub-Rouse chain interpretation close to the chain ends.
Laser-induced fluorescence measurements of spatially resolved OH densities in a helium plasma jet interacting with three different targets in the open air
Authors: Cosimi J , Marchal F , Merbahi N , Eichwald O , Gardou J P , Yousfi M 
Published: June 2023

Abstract
The presented research work is devoted to the measurements of the absolute densities of ground state OH radicals in an atmospheric pressure helium plasma jet launched in free air onto three different targets. The OH density is measured by using laser induced fluorescence (LIF). The plasma is generated inside a glass tube by a dielectric barrier discharge powered by a mono-polar pulsed high voltage. Estimation of the absolute density is based on a quantitative analysis of the spectral and temporal component of the LIF signal and does not require any assumption on the densities of colliding species. Based on this analysis, the spatially-resolved density distributions of OH radicals are determined in front of three different targets (metallic, dielectric, and ultra-pure water) placed in the open air at 2 cm from the exit of the glass tube. In order to also investigate the temporal behaviour of the OH densities, and the influence of the gas flow rate and of the amplitude of the voltage-pulse, planar LIF has been performed investigating the fluorescence signal (i) during the intervals of the discharge pulses, (ii) for various gas flow rates, and (iii) as a function of the amplitude of the voltage pulse. In the free jet configuration without a target, the OH densities were determined to be in the order of

10

19

m

−
3

, whereas they increased up to a factor of 10 in contact with a target. The spatial distributions were also influenced by the dielectric properties of the target: in the case of the metallic target, the maximum of the OH density was found to be in the center between the exit of the glass tube and the target, whereas in the case of the dielectric target, the maximum was found to be close to the surface of the target. In the case of ultra-pure water, the densities were equally distributed between the exit of the glass tube and the target. With this work, the influence of a target on the production of OH radicals was demonstrated, which enables the optimisation of the plasma parameters for an efficient production of OH radicals in front of a target with various dielectric properties.
Understanding the nanoscale chemistry of as-received and fast neutron irradiated Nb3Sn RRP® wires using atom probe tomography
Authors: Wheatley L E , Baumgartner T , Eisterer M , Speller S C , Moody M P , Grovenor C R M 
Published: June 2023

Abstract
Atom probe tomography (APT) has been used to study the effect of fast neutron irradiation on the local chemistry of Nb3Sn samples. Two RRP® wires doped with 2 at% Ti were analysed, one in the as-received condition and the other irradiated to a neutron fluence (E > 0.1 MeV) of 2.82 × 1022m−2 in the TRIGA-II reactor. The irradiated sample had a reduced T
c, an increase in F
p, a shift in the peak of the F
p curve suggesting the introduction of secondary point pinning, and an increase in the estimated scaling field B*. APT analysis has shown that polycrystalline Nb3Sn has three distinct regions of composition, near stoichiometry Nb3Sn (low Nb), regions with a higher Nb content than expected in equilibrium Nb3Sn (high Nb) and grain boundaries. The summed composition of these three regions lies within the Nb3Sn phase for both the as-received and irradiated samples. The distinct regions of high Nb Nb3Sn demonstrate incomplete diffusion in the as-received sample, and the reduction in volume of these high Nb regions after irradiation implies significant radiation induced diffusion has occurred. The presence of other features in the atomic-scale chemistry, such as the extent of Cu segregation at grain boundaries, three types of dislocation array, and unreacted Nb nanoparticles, are compared between samples.
Consistent cosmological structure formation on all scales in relativistic extensions of MOND
Authors: Thomas D.B. , Mozaffari A. , Zlosnik T. 
Published: June 2023

Abstract
General relativity manifests very similar equations in different regimes, notably in large scale cosmological perturbation theory, non-linear cosmological structure formation, and in weak field galactic dynamics. The same is not necessarily true in alternative gravity theories, in particular those that possess MONDian behaviour (“relativistic extensions” of MOND). In these theories different regimes are typically studied quite separately, sometimes even with the freedom in the theories chosen differently in different regimes. If we wish to properly and fully test complete cosmologies containing MOND against the ΛCDM paradigm then we need to understand cosmological structure formation on all scales, and do so in a coherent and consistent manner. We propose a method for doing so and apply it to generalised Einstein-Aether theories as a case study. We derive the equations that govern cosmological structure formation on all scales in these theories and show that the same free function (which may contain both Newtonian and MONDian branches) appears in the cosmological background, linear perturbations, and non-linear cosmological structure formation. We show that MONDian behaviour on galactic scales does not necessarily result in MONDian behaviour on cosmological scales, and for MONDian behaviour to arise cosmologically, there will be no modification to the Friedmann equations governing the evolution of the homogeneous cosmological background. We comment on how existing N-body simulations relate to complete and consistent generalised Einstein-Aether cosmologies. The equations derived in this work allow consistent cosmological N-body simulations to be run in these theories whether or not MONDian behaviour manifests on cosmological scales.
Testing the growth rate in homogeneous and inhomogeneous interacting vacuum models
Authors: Borges H.A. , Pigozzo C. , Hepp P. , Baraúna L.O. , Benetti M. 
Published: June 2023

Abstract
In this work we consider a class of interacting vacuum corresponding to a generalised
Chaplygin gas (gCg) cosmology. In particular we analyse two different scenarios at perturbation
level for the same background interaction characterised by the parameter α: (i) matter that
follows geodesics, corresponding to homogeneous vacuum, and (ii) a covariant ansatz for vacuum
density perturbations. In the latter case, we show that the vacuum perturbations are very tiny as
compared to matter perturbations on sub-horizon scales. In spite of that, depending on the value
of the Chaplygin gas parameter α, vacuum perturbations suppress or enhance the matter
growth rate as compared to the case (i). We use Cosmic Microwave Background (CMB), type Ia
supernovae (SNe) and Redshift Space Distortion (RSD) measurements to test the observational
viability of the model. We found that the mean value of our joint analysis clearly favours a
positive interaction, i.e., an energy flux from dark matter to dark energy, with α ≈
0.143 in both cases, while the cosmological standard model, recovered for α = 0, is ruled
out by 3σ confidence level. Noteworthy, the positive value of interaction can alleviate
both the H
0 and S
8 tension for the dataset considered here.