bluuebunny/crossref_metadata_2025_split huggingface dataset:
Carcinogenic dioxane detection using pristine and metal-doped 2D VSe2: Insights from density functional theory simulations
Authors: Pallikkara Chandrasekharan Sreejith , Lakshmy Seetha , Joseph Saju , Kalarikkal Nandakumar 
Published: June 2023

Dioxane (diethylene oxide) is a synthetic organic compound classified as heterocyclic ether, a potentially carcinogenic water toxicant. Prolonged exposure can cause eye irritation, carcinogenic liver reactions, and other severe issues. Therefore, efficient dioxane detectors are needed to be designed and developed. Inspired by the recent developments of 2D materials in biosensing, in this work, the dioxane detection potentiality of pristine and metal-doped (Al, Au, and Ag) 2D VSe2 have been systematically examined using Density Functional Theory (DFT) based simulations. Among all the metallic dopants considered, Al binds energetically on the VSe2 surface with an energy of −2.158 eV. The adsorption of dioxane was studied by considering the electronic properties, adsorption energy, orbital interactions, and charge transfer. Our DFT calculation suggests that dioxane adsorption in Al-doped VSe2 is more promising than the pristine and other metal-doped VSe2 systems, due to the reasonable adsorption energy of −0.80 eV, charge transfer of −0.567e, and strong orbital interaction between Al 3p and O 2p orbitals. Additionally, the room temperature structural solidity of the sensor has also been verified using the ab initio molecular dynamics simulations. The reported theoretical results inspire the fabrication and engineering of efficient dioxane sensors using Al-doped VSe2.
Kerr nonlinearity and group velocity dispersion of InGaAs/InP and GaAsSb/InP waveguides in the mid-infrared
Authors: Zhang Kevin , Böhm Gerhard , Belkin Mikhail A. 
Published: June 2023

We report measurements of Kerr nonlinearity and group velocity dispersion in In0.53Ga0.47As/InP and GaAs0.51Sb0.49/InP ridge waveguides in the mid-infrared using four-wave mixing at λ ≈ 5 µm. Measured values of Kerr nonlinearity are significantly higher compared to those reported for any other materials systems suitable for building dielectric waveguides with low losses and low group velocity dispersion in the mid-infrared (λ ≈ 3–15 μm). Our measurements establish both In0.53Ga0.47As/InP and GaAs0.51Sb0.49/InP materials as promising platforms for the development of on-chip mid-infrared frequency comb generation and supercontinuum light sources.
On the grammaticalization of ideophones
Authors: Andrason Alexander , Heine Bernd 
Published: June 2023

Ideophones, like English bang or
thud, are interactive expressions used as vivid
depictions of sensory imagery of states, events, objects, or
qualities (cf. Dingemanse
2011, 2012,
2018; Dingemanse & Akita 2017;
Andrason 2020, 2021). They are claimed to
represent a universal class of linguistic forms – that is, any given
language can be expected to have a set of them. That set may be
highly limited, as is the case in many European languages, but it
may as well be almost as large as that of lexical categories like
nouns and verbs. There are thousands of ideophones in the spoken
usage of languages like Korean, Japanese and Basque, which have 4500
or more of them (see Dingemanse
2018; Haiman
2018). Ideophones exhibit an ambivalent structural
behavior. On the one hand, they have been described as grammatical
forms that are syntactically unattached and prosodically set off
from surrounding text material. On the other hand, they have also
been described as morphosyntactically integrated adverbials,
adjectivals, verbals, or nominals in a number of languages. Building
on some earlier work (especially Dwyer & Moshi 2003), the goal of the present paper
is to look at ideophones from the perspective of grammaticalization
theory with a view to accounting for this ambivalent behavior. It is
argued in the paper that we are dealing here with a process that
differs from ‘canonical’ grammaticalization in that the end-product
of the process is a lexical rather than a grammatical form.
On swimmer’s strategies in various currents
Authors: Aghamohammadi Amir , Aghamohammadi Cina , Moghimi-Araghi Saman 
Published: June 2023

Abstract
Finding an optimum strategy to reach a certain destination by swimming in a background flow is an interesting question that leads to non-trivial results and swimming paths. Here we consider different strategies for various types of surface currents, including parallel currents, and currents resulting from spring sources, and sinks. Swimmers may instinctively swim toward the destination point. It turns out that this idea may not lead to the desired result in the presence of the background current. We will show in some cases the best strategy is to swim towards a certain point other than the actual destination. A different strategy may be to obtain the path of the least time and then follow the minimized path. We study this alternative strategy, too.
Semi-discrete Tikhonov regularization in RKHS with large randomly distributed noise
Authors: Zhong Min , Hu Yu 
Published: June 2023

Abstract
The concern of this paper is the numerical solution of the moderately ill-posed first kind integral equations in reproducing kernel Hilbert spaces. Different with previous works in (Krebs et al 2009 J. Inverse Ill-Posed Problems
17 845–69; Zhong et al 2012 Inverse Problems
28 065019), the amount of observation data is large, and corrupted by randomly distributed noise with large variance. In this paper, a purely data driven semi-discrete Tikhonov regularization method is proposed, effectively reconstructing the sought solution. The choice rules of parameters are provided and the rigorous upper bound estimation of confidence interval of the error in L
2 norm is established. Some numerical examples are provided to illustrate the appropriateness of the parameter choice and show the computational performances of the method.
Hybrid metrology for nanometric energy harvesting devices
Authors: Siaudinyte Lauryna , Hansen P-E , Koops R , Xu J , Peiner E 
Published: June 2023

Abstract
The parametrization of the nanostructures covering the energy harvesting (EH) devices play an important role in maximizing the exploitation of light and so does the selection of the best suitable fabrication and measurement methods. The fabrication and optical inspection of periodic cylindrical nanostructures for EH devices is a challenging task for both manufacturers and metrologists. In this paper we present the fabrication process of nanowires (NWs) along with optical and non-optical measurement techniques which were used to measure the geometrical parameters of these periodic nanostructures. The paper explains the benefits of hybrid metrology that combine data from different metrology tools to obtain more accurate dimensional information about the measured NW samples than those which can be achieved by using only one metrology instrument and thereby improve the fabrication process. Measurement procedure and the determination of geometrical parameters achieved with uncertainties down to 2 nm are provided in the paper and discussed in detail.
A multimodal natural frequency identification method of long-span bridges using GNSS
Authors: He Linyu , Ju Boxiao , Jiang Weiping , Fan Wenlan , Yuan Peng , Hu Junliang , Chen Qusen 
Published: June 2023

Abstract
Multimodal natural frequency is a crucial factor in determining the structural stability of bridges. Global navigation satellite system (GNSS) has become an increasingly important tool for monitoring the structural health of long-span bridges. This paper proposes a method for accurately determining multimodal natural frequencies in these structures using GNSS monitoring data. The proposed method involves decomposing GNSS displacement data into several signals that correspond to each mode using auto-regressive power spectrum decomposition, extraction of Intrinsic Mode Functions (IMFs) using empirical mode decomposition (EMD), identification of multimodal natural frequencies from the extracted IMFs using random decrement technique and Hilbert transform. The proposed method was validated through a simulation test and was applied to the Yingwuzhou Yangtze River Bridge. Results showed that this method was able to accurately identify the first six modal frequencies with a relative error of less than 8.09% compared to the theoretical values obtained through a finite-element model. This method outperforms other methods such as peak-picking, Complete Ensemble EMD with Adaptive Noise, and empirical wavelet transform, which can only identify the first three modes or fewer. Finally, four fieldwork experiments with different GNSS data show that the maximum range of relative errors of each identification is 3.65%, which fully demonstrates the effectiveness and universality of this method.
Asymptotics of discrete q-Freud
II
orthogonal polynomials from the q-Riemann Hilbert problem
Authors: Joshi Nalini , Lasic Latimer Tomas 
Published: June 2023

Abstract
We investigate a Riemann–Hilbert problem (RHP), whose solution corresponds to a group of q-orthogonal polynomials studied earlier by Ismail et al. Using RHP theory we determine new asymptotic results in the limit as the degree of the polynomials approach infinity. The RHP formulation also enables us to obtain further properties. In particular, we consider how the class of polynomials and their asymptotic behaviours change under translations of the q-discrete lattice and determine the asymptotics of a related q-Painlevé equation.
Using video analysis to study the behaviour of rubber balloons
Authors: Holovko Mykola , Kryzhanovskyi Serhii , Matsyuk Viktor 
Published: June 2023

Abstract
This work demonstrates a simple method for studying the behaviour of rubber balloons. For this purpose, a video analysis was performed using the Tracker software. Compared to other ways, this made it possible to simplify the experimental setup and make it much cheaper.
The Chandrasekhar limit: a simplified approach
Authors: Low Andrew M 
Published: June 2023

Abstract
This article outlines a simplified approach to approximating the Chandrasekhar limit for white dwarf stars at a level appropriate for advanced high school students, beginning undergraduate students, and high school teachers. Using a combination of introductory quantum mechanics and Einstein’s theory of special relativity, the electron degeneracy pressure is calculated in the non-relativistic and ultra-relativistic limits. By combining the electron degeneracy energy with the gravitational energy for a constant density star, an approximation to the Chandrasekhar mass is derived.
High-responsivity silicon p–i–n mesa-photodiode
Authors: Kukurudziak M S , Maistruk E V 
Published: June 2023

Abstract
Silicon p–i–n mesa-photodiodes have been made. Different variants of masking coating during etching of the mesa-profile have been studied. Comparative characteristic of photodetectors manufacture by planar- and mesa-technology have been carried out. Defect formation on the surface of silicon substrates in different options of technology was investigated. Parameters of photodiodes manufactured by planar and meso-technology were investigated. Photodiodes with a meso-structure have higher responsivity and lower capacitance than samples made by conventional planar technology.
Extension of Brauer and Rado perturbation theorems for regular matrix pencils
Authors: González-Pizarro Javier , Salas Mario , Soto Ricardo L 
Published: June 2023

Abstract
In this paper, we propose new results for changing eigenvalues of a regular matrix pencil A − λ
B, which are based on the well-known Brauer’s theorem [A Brauer, Limits for the characteristic roots of a matrix. IV. Applications to stochastic matrices, Duke Math. J., 19, 75-91, 1952] and Rado’s theorem [B N Parlett, Symmetric matrix pencils, J. Comput. Appl. Math., 38, 373-385, 1991.]. These results allow us to change eigenvalues of the original matrix pencil without altering its regularity and in a quite simple way, even allowing to change infinite eigenvalues. We also present an extension of Rado’s theorem that allows changing eigenvalues of a regular symmetric matrix pencil without altering its symmetric structure, and we show how to use these results in order to change the eigenvalues of a quadratic polynomial matrix. Finally, we present numerical examples that confirm the expected results with the new extensions of these theorems.
Investigation on near-field radiative heat transfer between two SiC films with different substrates
Authors: Zhang Jihong , Yang Bing , Yu Kun , Zhang Kaihua , Liu Haotuo , Wu Xiaohu 
Published: June 2023

Abstract
Near-field radiative heat transfer (NFRHT) has drawn significant attention in the past years due to potential applications in energy harvesting, and information storage. In practical applications, the substrate is necessary to make the structure more stable. However, the investigation of substrate influence on the NFRHT in previous works is rarely carried out. In this work, the influence of the substrate on the NFRHT between two SiC films is investigated. For lossless substrates, the NFRHT is enhanced in thick films (h = 7 nm and h = 20 nm), while suppressed in thin films (h = 1 nm). For lossy substrates, the loss of the substrate can effectively promote the NFRHT. The substrates of real materials are also considered. We find the NFRHT between two SiC films is suppressed, when the substrates are Au and SiO2. The underlying physics mechanism can be explained by the antisymmetric and symmetric mode of surface phonon polaritons (SPhPs) in SiC films, which are analyzed by the energy transmission coefficients (ETCs) as a function of angular frequency and wavevector. In addition, we find that the dispersion relations and ETCs exhibit a good agreement. We believe this work is helpful in understanding the effect of substrates on SPhPs and designing near-field radiation devices.
YSE-PZ: A Transient Survey Management Platform that Empowers the Human-in-the-loop
Authors: Coulter D. A. , Jones D. O. , McGill P. , Foley R. J. , Aleo P. D. , Bustamante-Rosell M. J. , Chatterjee D. , Davis K. W. , Dickinson C. , Engel A. , Gagliano A. , Jacobson-Galán W. V. , Kilpatrick C. D. , Kutcka J. , Le Saux X. K. , Malanchev K. , Pan Y.-C. , Quiñonez P. J. , Rojas-Bravo C. , Siebert M. R. , Taggart K. , Tinyanont S. , Wang Q. 
Published: June 2023

Abstract
The modern study of astrophysical transients has been transformed by an exponentially growing volume of data. Within the last decade, the transient discovery rate has increased by a factor of ∼20, with associated survey data, archival data, and metadata also increasing with the number of discoveries. To manage the data at this increased rate, we require new tools. Here we present YSE-PZ, a transient survey management platform that ingests multiple live streams of transient discovery alerts, identifies the host galaxies of those transients, downloads coincident archival data, and retrieves photometry and spectra from ongoing surveys. YSE-PZ also presents a user with a range of tools to make and support timely and informed transient follow-up decisions. Those subsequent observations enhance transient science and can reveal physics only accessible with rapid follow-up observations. Rather than automating out human interaction, YSE-PZ focuses on accelerating and enhancing human decision making, a role we describe as empowering the human-in-the-loop. Finally, YSE-PZ is built to be flexibly used and deployed; YSE-PZ can support multiple, simultaneous, and independent transient collaborations through group-level data permissions, allowing a user to view the data associated with the union of all groups in which they are a member. YSE-PZ can be used as a local instance installed via Docker or deployed as a service hosted in the cloud. We provide YSE-PZ as an open-source tool for the community.
A charged star with geometric Karmarkar condition
Authors: Estevez-Delgado Gabino , Estevez-Delgado Joaquin , Soto-Espitia Rafael , Rendón Romero Antonio , Paulin-Fuentes Jorge Mauricio 
Published: June 2023

Abstract
In this paper, we analyse an analytical solution of the Einstein–Maxwell field equations that considers matter with anisotropic pressures in a static and spherically symmetric geometry. We report the manner in which we obtained the solution, which is by means of the Karmarkar condition. For the model, we assume a state equation that describes the interaction of matter from quarks P = (c
2
ρ − 4B

g
)/3 and we consider the presence of electric charge, which can generate that the radial and tangential pressures are not equal. In a graphic manner, we analyse the physical properties of the model, taking as the observational data those of mass 1M
⊙ and radius 7.69 km which were reported for the star Her X-1. The charge values are found between 5.57 × 1018C ≤ Q ≤ 1.31 × 1020C and the interval of the Bag constant B

g
∈ [118.7, 122.13]MeV/fm3. Also, we show the stability of the configuration by means of the static stability criteria of Harrison–Zeldovich–Novikov

∂
M

∂

ρ

c

>
0

, as well as in regards to infinitesimal radial adiabatic perturbation, since the adiabatic index γ > 3.3 which guarantees the stability of the solution.
Comment on ‘On the dimension of angles and their units’
Authors: Quincey Paul 
Published: June 2023

Abstract
The paper by Mohr et al (2022 Metrologia
59 053001) makes a strong case for angles having their own dimension, so that the radian should be treated as independent of the existing SI base units, and not somehow equivalent to the number 1. The authors also show how current practice effectively simplifies complete (unit-independent) equations by setting the term Θ/2π equal to 1, where Θ is the angle of one revolution, and this is analogous to how theoretical physicists sometimes set the speed of light c equal to 1. However, they make a significant error in their treatment of frequency, which needs to be highlighted. They have, in effect, adopted the standard definition for ‘angular frequency’ as their definition of ‘frequency’. This leads to unnecessary confusion and problems that are entirely separable from the issue of angles having their own dimension.
Waveform distortion of off-axis fishbone instability in the nonlinear magnetohydrodynamic evolution in tokamak plasmas
Authors: Li Hanzheng , Todo Yasushi , Wang Hao , Wang Jialei , Idouakass Malik 
Published: June 2023

Abstract
We have investigated the waveform distortion of energetic particle driven off-axis fishbone mode (OFM) in tokamak plasmas with kinetic magnetohydrodynamic (MHD) hybrid simulations. We extended our previous simulations (Li et al 2022 Nucl. Fusion
62 026013) by considering higher-n harmonics in the MHD fluid, where n is toroidal mode number. The waveform distortion is successfully reproduced in the simulation for both magnetic fluctuations and temperature fluctuations. It is clarified that the waveform distortion arises from the superposition of the n = 2 harmonics on the fundamental n = 1 harmonics of OFM, where the n = 2 harmonics are generated by the MHD nonlinearity from the n = 1 OFM. Two types of waveform distortion can occur depending on the phase relationship between the n = 1 and n = 2 harmonics and the relative amplitude of the n = 2 harmonics to the n = 1 harmonics. Lissajous curve analyses indicate that the wave couplings between the n = 1 and n = 2 harmonics with phase-lock

∼

π

and

∼

0

lead to ‘rising distortion’ and ‘falling distortion’, respectively. The two types of waveform distortion can be attributed to the strong shearing profile of radial MHD velocity with n = 2 around the q = 2 magnetic flux surface. The dependence of waveform distortion on viscosity is investigated. It is found that the viscosity which is needed to reproduce the waveform distortion is larger than that in the experiment.
Comparison among possible design solutions for the Stray Field Shielding System of the DTT Neutral Beam Injector
Authors: Veronese Fabio , Agostinetti Piero , Calabrò Giuseppe , Crisanti Flavio , Fanelli Pierluigi , Lombroni Riccardo , Murari Andrea 
Published: June 2023

Abstract
Within the effort on the conceptual design of the Divertor Test Tokamak (DTT) Neutral Beam
Injector (NBI), the design of the Stray Field Shielding System (SFSS) for DTT NBI is under
development, to suppress the potentially harmful effects of the stray poloidal field from the
tokamak on the accelerated charged beam. Various possible design solutions to solve this problem
are presented and compared, with a particular focus on the stray field minimization procedure and
particle tracing simulations, used during the design validation phase with the objective of
maximizing beamline performances.
Estimating aboveground biomass density using hybrid statistical inference with GEDI lidar data and Paraguay’s national forest inventory
Authors: Bullock Eric L , Healey Sean P , Yang Zhiqiang , Acosta Regino , Villalba Hermelinda , Insfrán Katherin Patricia , Melo Joana B , Wilson Sylvia , Duncanson Laura , Næsset Erik , Armston John , Saarela Svetlana , Ståhl Göran , Patterson Paul L , Dubayah Ralph 
Published: June 2023

Abstract
Forests are widely recognized as critical to combating climate change due to their ability to sequester and store carbon in the form of biomass. In recent years, the combined use of data from ground-based forest inventories and remotely sensed data from light detection and ranging (lidar) has proven useful for large-scale assessment of forest biomass, but airborne lidar is expensive and data acquisition is infeasible for many countries. By contrast, the spaceborne Global Ecosystem Dynamics Investigation (GEDI) lidar instrument has collected freely available data for most of the world’s temperate and tropical forests since 2019. GEDI’s biomass products rely on models calibrated with a global network of field plots paired with GEDI waveforms simulated from airborne lidar to predict biomass. While this calibration strategy minimizes spatial and temporal offsets between field measurements and corresponding lidar returns, calibration data are sparse in many regions. Paraguay’s forests are known to be poorly represented in GEDI’s current calibration dataset, and here we demonstrate that local models calibrated opportunistically with on-orbit GEDI data and field surveys from Paraguay’s national forest inventory can be used with GEDI’s statistical estimators of aboveground biomass density (AGBD). We specify a protocol for opportunistically matching GEDI observations with field plots to calibrate a field-to-GEDI biomass model for use in GEDI’s hybrid statistical framework. Country-specific calibration using on-orbit data resulted in relatively accurate and unbiased predictions of footprint-level biomass, and importantly, supported the assumption underlying model-based inference that the model must ‘apply’ to the area of interest. Using a locally calibrated biomass model, we estimate that the mean AGBD in Paraguay is 65.55 Mg ha−1, which coincides well with the design-based approach employed by the national forest inventory. The GEDI estimates for individual forest strata range from 52.34 Mg ha−1 to 103.88 Mg ha−1. On average, the standard errors are 47% lower for estimates based on GEDI than the forest inventory, representing a significant gain in precision. Our research demonstrates that GEDI can be used by national forest inventories in countries that seek reliable estimates of AGBD, and that local calibration using existing field plots may be more appropriate in some applications than using GEDI global models, especially in regions where those models are sparsely calibrated.