bluuebunny/crossref_metadata_2025_split huggingface dataset:
A machine learning driven automated system for safety data sheet indexing
Authors: Suman Aatish , Khan Misbah , Talreja Veeru , Penfield Julia , Crowell Stephanie 
Published: February 2024

AbstractSafety Data Sheets (SDS) are foundational to chemical management systems and are used in a wide variety of applications such as green chemistry, industrial hygiene, and regulatory compliance, among others within the Environment, Health, and Safety (EHS) and the Environment, Social, and Governance (ESG) domains. Companies usually prefer to have key pieces of information extracted from these datasheets and stored in an easy to access structured repository. This process is referred to as SDS “indexing”. Historically, SDS indexing has always been done manually, which is labor-intensive, time-consuming, and costly. In this paper, we present an automated system to index the composition information of chemical products from SDS documents using a multi-stage ensemble method with a combination of machine learning models and rule-based systems stacked one after the other. The system specifically indexes the ingredient names, their corresponding Chemical Abstracts Service (CAS) numbers, and weight percentages. It takes the SDS document in PDF format as the input and gives the list of ingredient names along with their corresponding CAS numbers and weight percentages in a tabular format as the output. The system achieves a precision of 0.93 at the document level when evaluated on 20,000 SDS documents annotated for this purpose.
Plasmon resonance dynamics and enhancement effects in tris(2,2′-bipyridine)ruthenium(ii) gold nanosphere oligomers
Authors: Yunusa Umar , Warren Natalie , Schauer David , Srivastava Prasenjit , Sprague-Klein Emily 
Published: February 2024

We report a plasmon-mediated resonance energy transfer in an optimized gold nanosphere oligomer system that enhances the photoexcited population of the well known Ru-dye, [Ru(BPY)3]2+ with a defluorescenced Raman signal.
Strategies of Hearing Preservation With Military Personnel: A Scoping Review
Authors: Betes Heupa Adriana , Simões Pierângela Nota , de Araújo Cristiano Miranda , Taveira Karinna Veríssimo Meira , José Maria Renata , de Oliveira Gonçalves Claudia Giglio , Lüders Débora 
Published: February 2024

Purpose:
The purpose of this study was to map the strategies used in hearing health education with military personnel during the Hearing Preservation Program (HPP).

Method:
This study is a scoping review, with electronic searches conducted in online databases and gray literature: Latin American and Caribbean Literature in Health Sciences, PubMed/Medline, Scopus, Web of Science, ASHAWire, Google Scholar, and ProQuest Dissertation & Theses. Only studies describing, analyzing, or evaluating the application of the HPP to active duty or training military personnel were included.

Results:
A total of 3,478 references were retrieved, and 12 studies met the inclusion criteria. The strategies were classified into five categories: focus group aimed at exploring knowledge and perceptions regarding hearing health (five studies), training on the proper fitting of hearing protection devices (four studies), the utilization of audiovisual materials (seven studies), questionnaires administrated before and after educational intervention (five studies), and feedback survey concerning the implemented hearing health education (three studies).

Conclusion:
There are five strategies that aimed at assessing knowledge and attitudes, improving hearing health education, facilitating information access, and evaluating the applied actions.

Supplemental Material:

https://doi.org/10.23641/asha.25219589
DMCVS: Decomposed motion compensation‐based video stabilization
Authors: Huang Qian , Liu Jiwen , Jiang Chuanxu , Wang Yiming 
Published: February 2024

AbstractWith the popularity of handheld devices, video stabilization is becoming increasingly important. In previous studies, many methods have been proposed to stabilize shaky videos. However, these methods fail to balance between image content integrity and stability. Some methods sacrifice image content for better stability. Other methods ignore the subtle jitters, which leads to poor stability. This work innovatively proposes a video stabilization method based on decomposed motion compensation. First, a grid‐based motion statistics method is adopted for motion estimation, which obtains more accurate motion vectors according to matched likelihood estimates. Then, the motion compensation is inherently decomposed into two parts: linear motion compensation and auxiliary motion compensation. Linear motion compensation removes complex jitter by constructing linear path constraints to obtain a more stable camera path. Auxiliary motion compensation uses a moving average filter to remove the high‐frequency jitter as a supplement and preserve more image content. The two components are combined with individual weights to derive the final transform matrix and warp the original frames. Experimental results show that our method outperforms the previous methods on NUS and DeepStab datasets qualitatively and quantitatively.
Ultrahigh-brightness 50 MeV electron beam generation from laser wakefield acceleration in a weakly nonlinear regime
Authors: Xiang Zhongtao , Yu Changhai , Qin Zhiyong , Jiao Xuhui , Cheng Jiahui , Zhou Qiaoxuan , Axi Gatie , Jie Jianghua , Huang Ya , Cai Jintan , Liu Jiansheng 
Published: February 2024

We propose an efficient scheme to produce ultrahigh-brightness tens of MeV electron beams by designing a density-tailored plasma to induce a wakefield in the weakly nonlinear regime with a moderate laser energy of 120 mJ. In this scheme, the second bucket of the wakefield can have a much lower phase velocity at the steep plasma density down-ramp than the first bucket and can be exploited to implement longitudinal electron injection at a lower laser intensity, leading to the generation of bright electron beams with ultralow emittance together with low energy spread. Three-dimensional particle-in-cell simulations are carried out and demonstrate that high-quality electron beams with a peak energy of 50 MeV, ultralow emittance of ∼28 nm rad, energy spread of 1%, charge of 4.4 pC, and short duration less than 5 fs can be obtained within a 1-mm-long tailored plasma density, resulting in an ultrahigh six-dimensional brightness B6D,n of ∼2 × 1017 A/m2/0.1%. By changing the density parameters, tunable bright electron beams with peak energies ranging from 5 to 70 MeV, a small emittance of ≤0.1 mm mrad, and a low energy spread at a few-percent level can be obtained. These bright MeV-class electron beams have a variety of potential applications, for example, as ultrafast electron probes for diffraction and imaging, in laboratory astrophysics, in coherent radiation source generation, and as injectors for GeV particle accelerators.
Overall signature of the metric and the cosmological constant
Authors: Alexandre Bruno , Gielen Steffen , Magueijo João 
Published: February 2024

Abstract
We consider a little known aspect of signature change, where the overall sign of the
metric is allowed to change, with physical implications. We show how, in different formulations
of general relativity, this type of classical signature change across boundaries with a degenerate
metric can be made consistent with a change in sign (and value) of the cosmological constant
Λ. In particular, the separate “mostly plus” and “mostly minus” signature sectors of
Lorentzian gravity are most naturally associated with different signs of Λ. We show how
this general phenomenon allows for classical solutions where the open dS patch can arise from a
portion of AdS space time. These can be interpreted as classical “imaginary space” extensions of
the usual Lorentzian theory, with a
2 < 0.
The spectrally resolved photoluminescence decay in YAG:Er, ZnO and SiO2 crystals
Authors: Remeš Z , Buryi M , Pejchal J , Babčenko O , Remeš Š , Novák R , Mičová J 
Published: February 2024

Abstract
We present an optical setup for measuring spectrally resolved photoluminescence (PL) mean decay time using conventional UV LED with sinusoidal excitation and a phase shift method. The phase sensitive detection was applied on the Er-doped yttrium aluminium garnet single crystal (YAG:Er, grown by the micro-pulling-down method) and hydrothermally grown zinc oxide micro-crystallites (ZnO). Commercial ZnO and silicon oxide (SiO2) microcrystalline powders were measured for comparison. SiO2 powder was annealed in O2 plasma at 500 °C for cleaning. While YAG:Er shows well resolved greenish PL peaks with mean decay time about 15 μs related to the Stark splitting of Er3+ (4f11) states and ZnO micro-powder broad reddish PL with similar PL decay time, the plasma treated SiO2 powder shows weak bluish defect-related PL with significantly faster mean decay times below 100 ns.
Characterization of different types of silica-based materials
Authors: Babčenko O , Remeš Z , Beranová K , Kolářová K , Čermák J , Kromka A , Prošek Z , Tesárek P 
Published: February 2024

AbstractWaste glasses based on silicon dioxide (silica) belong to one of the most demanded secondary raw materials. Besides the glass industry, with strict requirements for source materials, silica-based granular materials from waste glasses are considered suitable for use as fillers in alkali-activated cement-based composites. However, due to variations of ground waste glass powder composition and properties a comprehensive characterization is often needed. This study investigated commercially available silica-based powders by scanning electron microscopy, X-ray photoelectron spectroscopy, attenuated total reflectance Fourier transform infrared spectroscopy and Fourier transform infrared Raman spectroscopy, zeta-potential and pH measurements, etc. The differences found in the non-silica impurities composition and structure of SiO2particles (amorphous vs crystalline) were considered as determinative factors that will affect particles’ interaction with water and cement binder. The observed results provide a fundamental background and will contribute to a better understanding and explanation of the silica-based secondary raw materials interaction reactions in concrete or mortar.
Modification of Ce3+ luminescence in Li+ and Mg2+ codoped GAGG:Ce scintillators: A comparative study using synchrotron radiation
Authors: Bartosiewicz K , Kurosawa S , Yamaji A , Zorenko Y , Yoshikawa A 
Published: February 2024

Abstract
The luminescence characteristics of Gd3Al2Ga3O12:Ce3+ garnet scintillator crystals codoped with Li+ and Mg2+ ions were investigated. The excitation and emission spectra were obtained within the energy range of 3.6-21.6 eV, at both liquid helium and room temperature conditions to examine the effects of Li+ and Mg2+ codoping on cerium valence states, gadolinium-cerium energy transfer, and defect formation. Codoping with Mg2+ was found to efficiently convert Ce3+ to Ce4+, evidenced by significant changes in the shapes of the excitation spectra profile for Ce3+ luminescence in the exciton range, while Li+ had little impact. The presence of the high concentration of Ce4+ ions hampered the Gd3+→Ce4+ energy transfer. Redshifts in Ce3+ emission peaks indicated codopant-induced perturbations to the crystal field environment. The significant changes in the location of the Ce3+ excitation bands of Ce3+ luminescence in the exciton range further suggested alterations in the elemental distributions by the creation of complex defect clusters, particularly with Mg2+ codoping. The results demonstrate that Li+ and Mg2+ uniquely impact cerium valence, energy transfer processes, and structural properties in GAGG:Ce crystals.
Development of cutting force components in high-speed cutting on turning centre
Authors: Vopát T , Straka R 
Published: February 2024

Abstract
The article deals with the investigation of high-speed cutting. The influence of cutting speed on the development of individual cutting force components in turning was determined. Cutting tests were carried out on turning centre during the machining of C45 medium carbon steel material. The cutting tool material was cubic boron nitride. Cutting speed was selected with respect to the high-speed cutting (HSC) based on previous studies. In the experiment, cutting force components were recorded. From the results, a decreasing trend in the cutting force values was observed from the cutting speed higher than 1100 m.min-1. It can be caused by changing of metallurgical and mechanical properties in the cutting zone because the overall cutting resistance during HSC was reduced. Chips changed colour to orange during the machining due to temperature changes. No great benefit was observed when high-speed cutting for turning medium carbon steel material. The inefficiency, in this case, is caused by the high price and low tool life of the CBN cutting inserts as well as the cutting force that decreases slowly after the initial increase with a rapidly increasing cutting speed.
Effect of bias voltage on the structural properties of WN/NbN nanolayer coatings deposited by cathodic-arc evaporation
Authors: Smyrnova K , Sahul M , Haršáni M , Čaplovič Ľ , Beresnev V , Čaplovičová M , Kusy M , Pogrebnjak A 
Published: February 2024

Abstract
In this work, WN/NbN nanolaminate coatings were synthesized by cathodic-arc physical vapor deposition (CA-PVD) technique on a stainless-steel substrate. The paper reports the microstructure, cross-sectional morphology, surface roughness, and adhesion strength changes caused by variations in the absolute values of the negative substrate bias voltage, Us
, in the 50-200 V range. Synthesized coatings were analyzed by Grazing incidence X-ray diffraction (GI-XRD), scanning transmission electron microscopy (STEM), scanning electron microscopy (SEM), laser scanning confocal microscopy (LSCM), and Daimler-Benz test. The phase analysis revealed that multilayer coatings had complex polycrystalline microstructure. They consisted of face-cantered cubic (fcc) β-W2N, fcc δ-NbN, and hexagonal ε-NbN phases. The total thickness and surface roughness had a descending trend with an increase in the absolute value of the negative bias voltage. Moreover, the WN/NbN coating deposited at Us = -50 V demonstrated the best adhesion strength to the substrate, suitable for protective coatings.
Influence the effect of balancing the grinding set on the accuracy and roughness of the machined surface
Authors: Jurina F , Straka R , Buranský I 
Published: February 2024

Abstract
The article examines the effect of balancing the grinding wheel set on the accuracy and roughness of the machined surface during the production of cutting tools. Screw drills with a diameter of 12 mm were manufactured as well as test specimen in the shape of a recess with a width of 20 mm and a diameter of 18 mm. The workpiece material was sintered carbide (WC+Co). Properly balanced and unbalanced sets of cubic boron nitride (CBN) and synthetic diamond grinding wheels were used in the production of the tools and test specimens. A WZS 60 Reinecker tool grinder was used as the machine. The parameters of surface roughness and dimensional accuracy were measured in the experiment. Surface roughness was evaluated on a Zeiss Surfcom 5000 shape and contour measuring machine. Dimensional accuracy measurement was performed on an optical measuring machine Zoller Genius 3. In terms of dimensional accuracy, tools and test specimen s produced by wheel balancing to a lower level of balance quality G show greater dimensional inaccuracy than tools and test specimen s produced by wheel sets that were balanced to a higher quality level of balance G. From the point of view of evaluating the surface roughness, the results were not clear, but the tools and test specimens produced by CBN grinding wheels showed better surface roughness, regardless of the quality level of balance G.
Modification of rotor modal properties based on structural changes in the stiffness of its bearings and shaft
Authors: Bucha P , Rolník L , Lovíšková J , Naď M 
Published: February 2024

Abstract
The rotor structures are fundamental mechanical systems that realize the transfer of rotary motion in technical devices and systems. In some operating regimes, the rotor systems are often subjected to undesirable and damaging phenomena resulting in resonant state. The ability to prevent or reduce the level of unwanted rotor vibrations in the given operating mode is an important task in the process of structural design of rotor structures. In general, the dynamic properties of rotor systems depend on their spatial properties - geometric parameters and material properties, i.e. distribution of mass and stiffness properties of rotor structures. For the structural design of the rotor or its structural modification, which will allow the redistribution of its spatial properties (mass and stiffness), two approaches based on changing the bearing stiffness and also on the shaft stiffness are presented in this paper. The main goal for modifying the spatial properties of the rotor is to get the critical rotor speed out of the operating speed range.
Exploration of microstructural characteristics, mechanical properties, and in vitro biocompatibility of biodegradable porous magnesium scaffolds for orthopaedic implants
Authors: Debbarma Debasish , Anand Nikhil , Pal Kaushik 
Published: February 2024

Abstract
In this study, porous magnesium (Mg) scaffolds were investigated with varying strontium (Sr) and constant zinc (Zn) concentrations through the powder metallurgy process. All samples were examined at room temperature to evaluate their microstructure, mechanical and in-vitro degradation behaviour and biological properties. Results indicated that adding Sr was associated with fine average grain size, increased mechanical strength, and a decreased corrosion rate. All samples show tiny isolated and open interconnected pores (porosities: 18%–30%, pores: 127–279 µm) with a suitable surface roughness of less than 0.5 µm. All the provided samples possess mechanical and hemocompatible properties that closely resemble natural bone. Mg–4Zn–2Sr has the highest hardness (102.61 ± 15.1 HV) and compressive strength (24.80 MPa) than Mg–4Zn–0.5Sr (85 ± 8.5 HV, 22.14 MPa) and Mg–4Zn–1Sr (97.71 ± 11.2 HV, 18.06 MPa). Immersion results revealed that samples in phosphate-buffered saline solutions have excellent degradability properties, which makes them a promising biodegradable material for orthopaedic applications. The scaffold with the highest Sr concentration shows the best optimised mechanical and degradation behaviour out of the three porous scaffolds, with a 2.7% hemolysis rate.
Ecofriendly and scalable production of bioglass using an organic calcium source enhanced bioactivity for tissue repair
Authors: Chen Yun , Hu Fang , Guo Chuangzhou , Dong Xihua , Wang Hai , Qin Yue 
Published: February 2024

Abstract
The eco-friendly and scalable production of bioglass remains a challenging but attractive strategy for advancing its widespread biomedical applications. Although the sol–gel method has been considered a valuable approach for bioglass production, the application of calcium nitrate as a calcium source markedly limits its industrialization owing to environmental pollution, high administration costs, and numerous calcium-rich regions in the as-prepared bioglass. Therefore, organic Ca has been proposed as an alternative to inorganic Ca. In the current study, bioglass was successfully prepared using a novel calcium source (calcium glycerol) and was named regeneration silicon (RegeSi). The biocompatibity of bioglass was examined by performing the methyl thiazolyl tetrazolium (MTT) assay using L929 fibroblasts. The biological and tissue repair properties of RegeSi were better than those of bioglass prepared with calcium nitrate using the sol–gel or traditional melting methods. The applicability of RegeSi was validated using suitable wound healing and dental restoration models. Notably, RegeSi ensured closure of a deep wound (1.6 cm diameter, 2 mm depth) within 11 d. Moreover, RegeSi facilitated tooth repair with a blocking rate of 97.1%. More importantly, large-scale production of RegeSi was achieved at low cost, high bioactivity, and using environmental technology, reaching a capacity of 100 kg/batch.
Connections between low- and high- frequency variabilities of stratospheric northern annular mode and Arctic ozone depletion
Authors: Yu Yueyue , Wu Yufeng , Zhang Jiankai , Cui Zhengfei , Shi Chunhua , Rao Jian , Guo Dong , Xia Xin 
Published: February 2024

Abstract
Previous studies have demonstrated a dynamical linkage between the ozone and stratospheric polar vortex strength, but only a few have mentioned the persistence of the anomalous vortex. This study uses the complete ensemble empirical mode decomposition with adaptive noise to decompose the winter stratospheric northern annular mode (NAM) variabilities into relatively low frequencies (>4 months) and high frequencies (<2 months) (denoted as NAML and NAMH) and investigates their relationship with the Arctic ozone concentration in March. A closer relationship is found between the Arctic ozone and the NAML, i.e. a persistently strong stratospheric polar vortex in winter (especially February–March) is more critical than a short-lasting extremely strong vortex in contributing to Arctic ozone depletion. We find that a negative NAMH or major stratospheric sudden warming event in early winter could be a precursor for the anomalous depletion of Arctic ozone in March. The NAML changes are further related to the warm North Pacific sea surface temperature (SST) anomalies and ‘central-type’ El Niño-like or La Niña-like SST anomalies in early winter months, as well as cold North Atlantic SST anomalies and higher sea ice concentration in the Barents–Kara Sea from late-autumn to early-spring.
Comment on ‘Twisted bialgebroids versus bialgebroids from a Drinfeld twist’
Authors: Škoda Zoran , Stojić Martina 
Published: February 2024

Abstract
A class of left bialgebroids whose underlying algebra

A
♯
H

is a smash product of a bialgebra H with a braided commutative Yetter–Drinfeld H-algebra A has recently been studied in relation to models of field theories on noncommutative spaces. In Borowiec and Pachoł (2017 J. Phys. A: Math. Theor.
50 055205) a proof has been presented that the bialgebroid

A
F

♯

H
F

where HF
and AF
are the twists of H and A by a Drinfeld 2-cocycle

F
=
∑

F
1

⊗

F
2

is isomorphic to the twist of bialgebroid

A
♯
H

by the bialgebroid 2-cocycle

∑
1
♯

F
1

⊗
1
♯

F
2

induced by F. They assume H is quasitriangular, which is reasonable for many physical applications. However the proof and the entire paper take for granted that the coaction and the prebraiding are both given by special formulas involving the R-matrix. There are counterexamples of Yetter–Drinfeld modules over quasitriangular Hopf algebras which are not of this special form. Nevertheless, the main result essentially survives. We present a proof with a general coaction and the correct prebraiding, and even without the assumption of quasitriangularity.