bluuebunny/crossref_metadata_2025_split huggingface dataset:
Challenges, feelings, and attitudes towards writing in ERPP in semi-periphery countries
Authors: Mendoza Arturo , Oropeza Viviana , Rodríguez Daniel , Sobrevilla Zazil , Martínez Joaquín 
Published: January 2022

AbstractThis paper addresses writing in ERPP for graduate students matriculated in a Mexican Public University where the medium of instruction is Spanish. The students who were involved in our study registered for an academic writing course in ERPP, and submitted a draft research article in English as part of the admission requirements. Following a mixed-method approach, through a survey and a semi-structured interview, we aimed to explore the various ways in which students use English for research and publication purposes, the discursive and non-discursive challenges they perceived while drafting the article, and their feelings and attitudes towards writing in ERPP. The findings suggest that the discursive and non-discursive challenges perceived were aggravated by the lack of critical-pragmatic approaches, the poor English writing skills developed for academic purposes, and the lack of support for editing their papers in English, particularly from thesis supervisors. This led them to experience feelings of anxiety, frustration and discomfort about writing in English. We would argue that this additional burden and pressure for graduate students to publish in English in semi-periphery countries translates into a lack of confidence and feeling of disadvantage in comparison with their counterparts located in anglophone research communities in centre countries.
Tagging terms in text
Authors: Rigouts Terryn Ayla , Hoste Véronique , Lefever Els 
Published: January 2022

Abstract
As with many tasks in natural language processing, automatic term extraction (ATE) is increasingly approached as a machine learning problem. So far, most machine learning approaches to ATE broadly follow the traditional hybrid methodology, by first extracting a list of unique candidate terms, and classifying these candidates based on the predicted probability that they are valid terms. However, with the rise of neural networks and word embeddings, the next development in ATE might be towards sequential approaches, i.e., classifying each occurrence of each token within its original context. To test the validity of such approaches for ATE, two sequential methodologies were developed, evaluated, and compared: one feature-based conditional random fields classifier and one embedding-based recurrent neural network. An additional comparison was added with a machine learning interpretation of the traditional approach. All systems were trained and evaluated on identical data in multiple languages and domains to identify their respective strengths and weaknesses. The sequential methodologies were proven to be valid approaches to ATE, and the neural network even outperformed the more traditional approach. Interestingly, a combination of multiple approaches can outperform all of them separately, showing new ways to push the state-of-the-art in ATE.
Different eccentric‐based power training volumes improve glycemic, lipidemic profile and body composition of females in a dose‐dependent manner: Associations with muscle fibres composition adaptations
Authors: Methenitis Spyridon , Nomikos Tzortzis , Mpampoulis Thomas , Kontou Eleni , Kiourelli Kleio‐Maria , Evangelidou Eftychia , Papadopoulos Constantinos , Papadimas George , Terzis Gerasimos 
Published: January 2022

ABSTRACTThe present study aimed to investigate the effect of different volumes of fast eccentric‐based training on body composition and lipidemic–glycemic profiles in females, as well as to explore the relationship between the change in glycemic–lipidemic profiles and the change in muscle fibre composition. Twenty‐nine young females were assigned into three groups and performed 10 weeks (2 training sessions per week) of either 3 (LV), 6 (MV) or 9 (HV) sets/session of four fast velocity eccentric‐only half‐squats against 70% of concentric 1RM, followed by 3 maximum countermovement jumps (CMJ) after each set. Body composition, vastus lateralis fibre‐type composition, and resting blood lipidemic and glycemic indices were evaluated 1 week before and after the training intervention. Significant changes in body composition, fasting glucose, HOMA‐IR and blood lipids were found after training with MV and HV (p < 0.05; η2: 0.135–0.390). Significant correlations were found between muscle fibres’ percentage cross‐sectional areas (%CSA) and resting glycemic–lipid values (r:−0.543to 0.730, p < 0.05). Training‐induced changes of glycemic‐lipid profiles were highly correlated to those of type IIa and IIx %CSAs (r: −0.895 to 0.898, p < 0.05). Partial Correlations revealed a significant impact of the imposed training volumes on these correlations. These results suggest that six but mostly nine sets per training session of the imposed training stimuli are needed for beneficial changes in resting glycemic–lipidemic profiles, changes which are related to the training‐induced changes in muscle fibre composition. However, these relationships are dictated by the imposed training volumes.Highlights
Power training induces beneficial changes in body composition, glycemic and lipidemic profiles.
Greater training volumes are needed for the healthier changes in glycemic–lipidemic profiles.
Higher Type I, IIA and lower IIX percentage cross‐sectional areas are linked with healthier body composition and glycemic‐lipidemic profiles.
Individuals experiencing the greatest increase in Type IIa and decrease in Type IIX muscle fibres cross‐sectional areas after power training are those with the greatest beneficial changes in body composition, glycemic and lipidemic profiles.
Rabi-like splitting and refractive index sensing with hybrid Tamm plasmon-cavity modes
Authors: Jena S , Tokas R B , Thakur S , Udupa D V 
Published: January 2022

Abstract
Rabi-like splitting and self-referenced refractive index sensing in hybrid plasmonic-1D photonic crystal structures have been theoretically demonstrated. The coupling between Tamm plasmon and cavity photon modes are tuned by incorporating a low refractive index spacer layer adjacent to the metallic layer to form their hybrid modes. Anticrossing of the modes observed at different values of spacer layer thickness validates the strong coupling between the two modes and causes Rabi-like splitting with different splitting energy. The modes coupling has been supported by coupled mode theory. Rabi-like splitting energy decreases with increasing number of periods (N) and refractive index contrast (η) of two dielectric materials used to make the 1D photonic crystals, and the observed variation is explained by an analytical model. Angular and polarization dependency of the hybrid modes shows that the polarization splitting of the lower hybrid mode is much stronger than that of the upper hybrid mode. On further investigation, it is seen that one of the hybrid modes remains unchanged while other mode undergoes significant change with varying the cavity medium. This nature of the hybrid modes has been utilized for designing self-referenced refractive index sensors for sensing different analytes. For η= 1.333 and N= 10 in a hybrid structure, the sensitivity increases from 51 to 201 nm RIU−1 with increasing cavity thickness from 170 to 892 nm. For the fixed cavity thickness of 892 nm, the sensitivity increases from 201 to 259 nm RIU−1 by increasing η from 1.333 to 1.605. The sensing parameters such as detection accuracy, quality factor, and figure of merit for two different hybrid structures [(η = 1.333, N = 10) and (η = 1.605, N = 6)] have been evaluated and compared. The value of resonant reflectivity of one of the hybrid modes changes considerably with varying analyte medium which can be used for refractive index sensing.
Study of vacuum arc plasma transport characteristics during the DC interrupting process
Authors: Huang Xiaolong , Sun Tao , Wu Yuezheng , Yang Shangyu , Zhao Lihua , Ning Wenjun , Wang Lijun 
Published: January 2022

Abstract
The mechanical DC vacuum circuit breaker based on forced-over-zero technology will inevitably generate vacuum arc during the actual interrupting process. Since the current drop frequency is usually very high, the vacuum arc usually exhibits obvious transient characteristics, and the excessive transient characteristics may even become a key factor limiting the interruption capacity. In order to improve the mechanical DC vacuum circuit breaker arc interrupting capability, this paper establishes a vacuum arc transient magneto-hydrodynamic simulation model in the DC interrupting process and studies the plasma transport characteristics of the vacuum arc under different DC interrupting conditions. The results show that the ion pressure, ion density and ion temperature decrease with decreasing arc current, while the ion velocity gradually increases during the DC interrupting process. The increase in breaking current and current drop frequency will increase the ion density in the arc column at the moment of current crossing zero, resulting in more difficult vacuum arc interrupting. The results of the study can provide an important theoretical basis for a deeper understanding of the vacuum arc transient process in the DC interrupting process and improve the DC vacuum circuit breaker arc interruption capability.
Topological phase transition associated with structural phase transition in ternary half Heusler compound LiAuBi
Authors: Yadav Anita , Kumar Shailesh , Muruganathan Manoharan , Kumar Rakesh 
Published: January 2022

Abstract
In this article, we report detailed theoretical investigations of topological phases in non-centrosymmetric half Heusler compound LiAuBi up to a pressure of 30 GPa. It is found that the compound forms into a dynamically stable face-centered cubic (FCC) lattice structure of space group

F

4

¯

3
m

(216) at ambient pressure. The compound is topologically non-trivial at ambient pressure, but undergoes a quantum phase transition to trivial topological phase at 23.4 GPa. However, the detailed investigations show a structural phase transition from FCC lattice (space group 216) to a honeycomb lattice (space group 194) at 13 GPa, which is also associated with a non-trivial to trivial topological phase transition. Further investigations show that the compound also carries appreciable thermoelectric properties at ambient pressure. The figure of merit (ZT) increases from 0.21 at room temperature to a maximum value of 0.22 at 500 K. The theoretical findings show its potential for practical applications in spintronics as well as thermoelectricity, therefore LiAuBi needs to be synthesized and investigated experimentally for its applications.
UV-enhanced NO2 sensor using ZnO quantum dots sensitized SnO2 porous nanowires
Authors: Jiang Tianchen , Liu Xin , Sun Jianbo 
Published: January 2022

Abstract
ZnO quantum dots sensitized SnO2 porous nanowires were fabricated and designed for UV excitation gas sensor. The ZnO/SnO2 composite (SZQ1%) with the molar proportion of 1:100 exhibits excellent sensing properties to NO2 gas under UV irradiation at 40 °C. The limits of detection of the SZQ1% sensor is 100 ppb. The humidity stability of SZQ1% was also measured and discussed by DC reversed circuit and complex impedance curves. The gas sensing mechanism is well discussed and illustrated to the ZnO quantum dots sensitized and the increased photo-generated carriers under UV irradiation.
Dielectric engineering enable to lateral anti-ambipolar MoTe
2
heterojunction
Authors: Geng Guangyu , Wu Enxiu , Xu Linyan , Hu Xiaodong , Miao Xiaopu , Zou Jing , Wu Sen , Liu Jing , Liu Yang , He Zhongdu 
Published: January 2022

Abstract
Atomically two-dimensional (2D) materials have generated widespread interest for novel electronics and optoelectronics. Specially, owing to atomically thin 2D structure, the electronic bandgap of 2D semiconductors can be engineered by manipulating the surrounding dielectric environment. In this work, we develop an effective and controllable approach to manipulate dielectric properties of h-BN through gallium ions (Ga+) implantation for the first time. And the maximum surface potential difference between the intrinsic h-BN (h-BN) and the Ga+ implanted h-BN (Ga+-h-BN) is up to 1.3 V, which is characterized by Kelvin probe force microscopy. More importantly, the MoTe2 transistor stacked on Ga+-h-BN exhibits p-type dominated transfer characteristic, while the MoTe2 transistor stacked on the intrinsic h-BN behaves as n-type, which enable to construct MoTe2 heterojunction through dielectric engineering of h-BN. The dielectric engineering also provides good spatial selectivity and allows to build MoTe2 heterojunction based on a single MoTe2 flake. The developed MoTe2 heterojunction shows stable anti-ambipolar behaviour. Furthermore, we preliminarily implemented a ternary inverter based on anti-ambipolar MoTe2 heterojunction. Ga+ implantation assisted dielectric engineering provides an effective and generic approach to modulate electric bandgap for a wide variety of 2D materials. And the implementation of ternary inverter based on anti-ambipolar transistor could lead to new energy-efficient logical circuit and system designs in semiconductors.
Water-assisted controllable growth of atomically thin WTe2 nanoflakes by chemical vapor deposition based on precursor design and substrate engineering strategies
Authors: Zhou Guoliang , Gao Hui , Li Jin , He Xiaoyue , He Yanbing , Li Yan , Hao Guolin 
Published: January 2022

Abstract
WTe2 nanostructures have intrigued much attention due to their unique properties, such as large non-saturating magnetoresistance, quantum spin Hall effect and topological surface state. However, the controllable growth of large-area atomically thin WTe2 nanostructures remains a significant challenge. In the present work, we demonstrate the controllable synthesis of 1T′ atomically thin WTe2 nanoflakes (NFs) by water-assisted ambient pressure chemical vapor deposition method based on precursor design and substrate engineering strategies. The introduction of water during the growth process can generate a new synthesized route by reacting with WO3 to form intermediate volatile metal oxyhydroxide. Using WO3 foil as the growth precursor can drastically enhance the uniformity of as-prepared large-area 1T′ WTe2 NFs compared to WO3 powders. Moreover, highly oriented WTe2 NFs with distinct orientations can be obtained by using a-plane and c-plane sapphire substrates, respectively. Corresponding precursor design and substrate engineering strategies are expected to be applicable to other low dimensional transition metal dichalcogenides, which are crucial for the design of novel electronic and optoelectronic devices.
Using inverse Laplace transform in positronium lifetime imaging
Authors: Shibuya Kengo , Saito Haruo , Tashima Hideaki , Yamaya Taiga 
Published: January 2022

Abstract
Positronium (Ps) lifetime imaging is gaining attention to bring out additional biomedical information from positron emission tomography (PET). The lifetime of Ps in vivo can change depending on the physical and chemical environments related to some diseases. Due to the limited sensitivity, Ps lifetime imaging may require merging some voxels for statistical accuracy. This paper presents a method for separating the lifetime components in the voxel to avoid information loss due to averaging. The mathematics for this separation is the inverse Laplace transform (ILT), and the authors examined an iterative numerical ILT algorithm using Tikhonov regularization, namely CONTIN, to discriminate a small lifetime difference due to oxygen saturation. The separability makes it possible to merge voxels without missing critical information on whether they contain abnormally long or short lifetime components. The authors conclude that ILT can compensate for the weaknesses of Ps lifetime imaging and extract the maximum amount of information.
Motor unit buckling in variable recruitment fluidic artificial muscle bundles: implications and mitigations
Authors: Mazzoleni Nicholas , Kim Jeong Yong , Bryant Matthew 
Published: January 2022

Abstract
Fluidic artificial muscles (FAMs) are a popular actuation choice due to their compliant nature and high force-to-weight ratio. Variable recruitment is a bio-inspired actuation strategy in which multiple FAMs are combined into motor units that can be pressurized sequentially according to load demand. In a traditional ‘fixed-end’ variable recruitment FAM bundle, inactive units and activated units that are past free strain will compress and buckle outward, resulting in resistive forces that reduce overall bundle force output, increase spatial envelope, and reduce operational life. This paper investigates the use of inextensible tendons as a mitigation strategy for preventing resistive forces and outward buckling of inactive and submaximally activated motor units in a variable recruitment FAM bundle. A traditional analytical fixed-end variable recruitment FAM bundle model is modified to account for tendons, and the force–strain spaces of the two configurations are compared while keeping the overall bundle length constant. Actuation efficiency for the two configurations is compared for two different cases: one case in which the radii of all FAMs within the bundle are equivalent, and one case in which the bundles are sized to consume the same amount of working fluid volume at maximum contraction. Efficiency benefits can be found for either configuration for different locations within their shared force–strain space, so depending on the loading requirements, one configuration may be more efficient than the other. Additionally, a study is performed to quantify the increase in spatial envelope caused by the outward buckling of inactive or low-pressure motor units. It was found that at full activation of recruitment states 1, 2, and 3, the tendoned configuration has a significantly higher volumetric energy density than the fixed-end configuration, indicating that the tendoned configuration has more actuation potential for a given spatial envelope. Overall, the results show that using a resistive force mitigation strategy such as tendons can completely eliminate resistive forces, increase volumetric energy density, and increase system efficiency for certain loading cases. Thus, there is a compelling case to be made for the use of tendoned FAMs in variable recruitment bundles.
Singularities in the gravitational capture of dark matter through long-range interactions
Authors: Gaidau Cristian , Shelton Jessie 
Published: January 2022

Abstract
We re-examine the gravitational capture of dark matter (DM) through long-range interactions. We demonstrate that neglecting the thermal motion of target particles, which is often a good approximation for short-range capture, results in parametrically inaccurate results for long-range capture. When the particle mediating the scattering process has a mass that is small in comparison to the momentum transfer in scattering events, correctly incorporating the thermal motion of target particles results in a quadratic, rather than logarithmic, sensitivity to the mediator mass, which substantially enhances the capture rate. We quantitatively assess the impact of this finite temperature effect on the captured DM population in the Sun as a function of mediator mass. We find that capture of DM through light dark photons, as in e.g. mirror DM, can be
powerfully enhanced, with self-capture attaining a geometric limit over much of parameter space.
For visibly-decaying dark photons, thermal corrections are not large in the Sun, but may be important in understanding long-range DM capture in more massive bodies such as Population III stars. We additionally provide the first calculation of the long-range DM self-evaporation rate.
The effect of initial phase on the emission characteristics of forward electron colliding with a tightly focused linearly polarized few-cycle laser pulse
Authors: Li XingKang , Mao Shuwen , Yu Penghang , Chang JianPing , Tian Youwei 
Published: January 2022

Abstract
We have studied the high harmonic radiation property from the scattering of an electron with a focused few-cycle laser pulse by analyzing the distribution of the radiation field and the motion state of the electron. In the time domain, temporal width of the compressed radiation can reach 33 zs (zeptosecond), thus an ultrashort x-ray pulse was generated in the interaction process. The radiation in this process is vastly similar to high harmonic generation in the process of atomic strong-field. The latter depends to a large extent on the phase of carrier-envelope (CE) driving laser pulse. The cutoff of radiation spectrum can reach

1
×

10
5

ω
0

, and whether the high-order harmonic spectrum in the cut-off region can be well resolved depends on the CE phase. We have investigated the relationship between the maximum radiation intensity and the CE phase, and discussed a potential method to characterize the CE phase of an intense few-cycle laser pulse for broader application prospects.
Dynamic characteristics and noise modelling of directly modulated quantum well-dots microdisk lasers on silicon
Authors: Zhukov Alexey E , Moiseev Eduard I , Nadtochiy Alexey M , Makhov Ivan S , Ivanov Konstantin A , Dragunova Anna S , Fominykh Nikita A , Shernyakov Yuri M , Mintairov Sergey A , Kalyuzhnyy Nikolay A , Mikushev Sergey V , Zubov Fedor I , Maximov Mikhail V , Kryzhanovskaya Natalia V 
Published: January 2022

Abstract
The small-signal amplitude modulation, threshold, and spectral characteristics of microdisk lasers with InGaAs/GaAs quantum well-dots active region were studied jointly with the spectral and threshold parameters of edge-emitting lasers made from the same epitaxial heterostructure. Using the obtained material parameters, the relative intensity noise of the microdisk lasers was calculated as a function of the bias current and side-mode suppression ratio. It is shown that the integral noise is low enough for error-free optical data transmission with the maximum possible bitrate limited by the microdisk modulation bandwidth, if the bias current is above 1.7× threshold current (for side mode suppression ratio > 20 dB).
Physics design point of high-field stellarator reactors
Authors: Alonso J.A. , Calvo I. , Carralero D. , Velasco J.L. , García-Regaña J.M. , Palermo I. , Rapisarda D. 
Published: January 2022

Abstract
The ongoing development of electromagnets based on high temperature superconductors has led to the conceptual exploration of high-magnetic-field fusion reactors of the tokamak type, operating at on-axis fields above 10 T. In this work we explore the consequences of the potential future availability of high-field three-dimensional electromagnets on the physics design point of a stellarator reactor. We find that, when an increase in the magnetic field strength B is used to maximally reduce the device linear size R ∼ B
−4/3 (with otherwise fixed magnetic geometry), the physics design point is largely independent of the chosen field strength/device size. A similar degree of optimization is to be imposed on the magnetohydrodynamic, transport and fast ion confinement properties of the magnetic configuration of that family of reactor design points. Additionally, we show that the family shares an invariant operation map of fusion power output as a function of the auxiliary power and relative density variation. The effects of magnetic field over-engineering and the R(B) scaling of design points with constant neutron wall loading are also inspected. In this study we use geometric parameters characteristic of the helical axis advanced stellarator reactor, but most results apply to other stellarator configurations.