bluuebunny/crossref_metadata_2025_split huggingface dataset:
After Words: There Is No Language without Materiality
Authors: Pennycook Alastair 
Published: April 2024

AbstractPosthumanist thought brings a set of ethical and political concerns to the (socio)linguistic table to do with human relations to the planet and its other inhabitants. This opens up a space for reconsideration of language and materiality. In some accounts, language is an immaterial medium whose relation to the material world is only symbolic or representational. New materialist accounts of language, by contrast, view it as embodied, embedded and distributed activity (language is assembled and extended by bodies in physical space). This is to suggest that language, both material and symbolic, is deeply entwined with a world both material and symbolic and that any approach to sociolinguistics that seeks to grasp language in the world needs to work with an understanding of the dynamic entanglements between an animated world of matter and a material world of language. This is to focus on the material foundations of communication, the corporeal, physical, or technological conditions of human and nonhuman communicative interaction and on the relationships between material realities and discourse. This is to ask what and where language is and to suggest that without material relations there is no language.
“From the Side, You Should Look like a Japanese Ham Sandwich, No Gap Anywhere”: Exploring Embodied, Linguistic, and Nonlinguistic Signs in Enregisterment Processes of Bikram Yoga in Online and Offline Spaces
Authors: Gonçalves Kellie 
Published: April 2024

AbstractThis article analyzes the semiotic links between embodied, linguistic, and nonlinguistic signs found in a Bikram yoga studio in Oslo, Norway, and on its website, which are informed by other hegemonic sites of yoga circulation on a more global level, which include the Bikram franchise and Lululemon. Drawing on (digital) ethnographic data, I employ the analytical concepts of enregisterment (Agha 2007) and mediatization (Agha 2011), in order to trace these interlocking processes within three institutional sites that disseminate and transmit a (Bikram) yoga register through the analysis of multimodal images both offline and online. The mediated messages of flexible, embodied, and highly commodified practices that attain high cultural and social value are dialectally embedded in physical, material, and technological environments contributing to posthumanist theorization on how we understand language in relation to people, objects, and place with the aim of broadening our understanding of communication to relocate where social semiotics occurs (Pennycook 2018b).
Introduction: Unthinking Language from a Posthumanist Perspective
Authors: Schneider Britta , Heyd Theresa 
Published: April 2024

AbstractIn this special issue, we inspect material and nonhuman phenomena that contribute to interaction and meaning-making—among them sounds, visual signs, animals, images, digital devices, bodies, and movements—in order to stimulate new thinking surrounding the question of what language is from a posthumanist perspective. The contributors are language-oriented scholars who focus on material and technological environments in language. They interrogate how linguistic and nonlinguistic practices interrelate to produce meaning, concepts of the human, and social relations. The theoretical backgrounds of such posthumanist approaches to the sociomaterial practice of interaction are introduced in this article.
Teaching fluorescence of plants & algae in physics class to address climate change
Authors: Chen Yi Jinn Lillian , Lih Jiann-Shing , Chen Tzu-Chun , Hung Jeng-Fung , Kuo Heng-Miao , Ko Jing-Yuan 
Published: April 2024

Abstract
In physics classes and general education classes, teaching the concept of fluorescence can be challenging, and it may seem too theoretical for some students. A short YouTube video titled ‘Seeing Photosynthesis from Space’ displays a global map of photosynthesis, and this is an excellent, attention-getting way to visually introduce fluorescence to students and also to address climate change. Therefore, three hands-on activities were designed using spinach chlorophyll ethanol extract and olive oil to observe the fluorescence emission; in addition, a smartphone spectrophotometer was employed to observe the spectrum of the emission. The class also addressed the issue of global warming because the absorption of CO2 by plants and algae is decreasing, which may cause serious climate change.
Low-temperature preparation and characteristics of top-gate thin-film transistors with La-ZTO active layers and polymethylmethacrylate dielectric layers
Authors: Yue Lan , Meng Fanxin , Min Su 
Published: April 2024

Abstract
A top-gate coplanar-structure thin-film transistor (TFT) combining the advantages of both a co-sputtered amorphous La-doped ZnSnO (a-La-ZTO) active layer and solution-based polymethylmethacrylate (PMMA) gate dielectric layer has been prepared under low temperature (100 °C) with low cost for the first time. The results indicate that the PMMA thin film demonstrates anti-reflection properties when it combines with a-La-ZTO layer to form a double-layer film, displaying high transparency to visible light of ∼90.3%. Moreover, it was found that the La target power during the deposition of a-La-ZTO film plays an important role in suppressing the formation of oxygen vacancies and adjusting the carrier concentration of a-La-ZTO active layer, thus impacting a-La-ZTO TFT performance. Overall, the optimum a-La-ZTO TFT with a La target power of 13.9 W, working in an n-channel enhancement mode, possesses a large saturated mobility (>10 cm2 (Vs)−1) and an on/off drain current ratio over 105.
An umbrella-shaped flexible mechanism piezoelectric actuator with driving foot trajectory control
Authors: Pang Xiaoyang , She Mingyun , Xing Siyuan , Zhou Liming , Tian Hailong , Gao Jingwen , Li Jianping , Jiang Bingchun 
Published: April 2024

Abstract
Traditional stick-slip piezoelectric actuators generally have problems such as large backward motion and small load capacity, which affect the driving effect. In this study, the effect of no backward motion and large load capacity is realized by controlling two sawtooth wave-driven piezoelectric stacks on the basis of umbrella-shaped flexible mechanism. The trajectory of the driving foot is simulated by transient simulation and verified by experiment. A prototype of actuator is made, and the effects of voltage, symmetry of sawtooth wave, and the phase difference of the two waves on the driving effect are investigated through experiments, and the optimal driving waveform is found. Experiments have shown that no displacement regression and stable driving is achieved when driving with two sets of sawtooth waves with 100 V, 100% symmetry and 20 V, 70% symmetry. With this drive waveform at 1 Hz, the maximum horizontal and vertical loads are 150 g and 1400 g, respectively. And the maximum driving speed is 13 935 μm s−1 when the driving frequency is 7000 Hz. Experimentally, it is proved that the actuator is able to realize smooth driving and large load capacity without backward motion, and has the same forward and reverse working performance, which has greater research value and market application scenarios.
Design, structure analysis and shock control of aircraft landing gear system with MR damper
Authors: Kang Byung-Hyuk , Choi Seung-Bok 
Published: April 2024

Abstract
This study proposes a new magneto-rheological aircraft main landing gear (MRAMLG) system and comprehensively treats from a mathematical modelling to drop testing for the evaluation of the landing efficiency. A mathematical model is formulated based on specifications and requirements of existing small aircraft Oleo type landing gear system. To ensure structural stability of the landing gear components such as main trust, column and trunnion, a transient structural analysis is carried out using the finite element method (FEM) and a fatigue life is analysed based on empirical formulas and the rainflow-counting (RC) algorithm. Subsequently, a novel controller is formulated to enhance the landing efficiency by integrating the time delay model and 3-stage hysteresis regulator. In the synthesis of the controller, a desired force model based on the energy law is added to accurately track the desired yield stress needed for the desired field-dependent force. In this work, the proposed control algorithm is named as the model-based force-tracking (MBFT) controller. To evaluate the landing efficiency or shock struct efficiency (SSE) of the proposed MRAMLG, an experimental apparatus for drop test is designed and manufactured by considering a dummy (sprung) mass of 640–720 kg at the maximum sink speed of 3 m s−1. The sink speed represents the rate of descent of the MRAMLG’s tire just before it touches the ground. It is demonstrated from simulation and experiment that the SSE with the MBFT controller is higher than 83% across various landing conditions with different sprung mass and sink speed, while the conventional controllers, proportional-integral and skyhook, compared to MBFT, do not show consistent performance depending on the sprung mass and sink speed.
Quasi-periodic oscillations and particle motion around charged black hole surrounded by a cloud of strings and quintessence field in Rastall gravity
Authors: Ashraf Asifa , Ditta Allah , Sofuoğlu Değer , Ma Wen-Xiu , Javed Faisal , Atamurotov Farruh , Mahmood Asif 
Published: April 2024

Abstract
This work mainly focuses on unveiling the particle dynamics features of black holes. For this objective, we utilize the charged black hole geometry consisting of the cloud strings and quintessence under the ansatz of Rastall gravity. We have calculated and analyzed the effective potential, angular momentum, particle energy, horizon radius, inner stable circular orbit, photon sphere radius, quasi-periodic oscillations, and effective force to reveal the dynamical features. We in detail discussed the effects of charge in black hole, Rastall parameter, strings of cloud parameter, and quintessential parameter on the calculated results. To ensure the scenario of accelerated expansion, ω

q
lies in the range −1 < ω

q
< −1/3. From this specific range, we choose ω

q
= −2/3.
Optical and photoluminescence properties of trivalent rare earth ions doped LiMgPO4
Authors: Farooq Mudasir , Rafiq Haqnawaz , Rasool Mir Hashim , Nazir Irfan , Rubab Seemin 
Published: April 2024

Abstract
Trivalent rare-earth-activated luminescent materials have attracted a lot of attention due to their fascinating optical properties and broad range of applications. In this study, polycrystalline Sm and Eu-doped LiMgPO4 luminescent materials were synthesized using a solid-state reaction technique. The crystalline structures, morphological features, and optical characteristics of the synthesized materials were thoroughly investigated using x-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Field-Emission Scanning Electron Microscopy (FE-SEM) and UV–vis spectroscopy. The Rietveld refinement analysis confirmed the phase purity of synthesized phosphors. In addition, the strain induced owing to the incorporation of trivalent rare-earth ions and crystallite sizes of each synthesized material was estimated using the Williamsons-Hall (W-H) and modified Debye-Sherrer equations. The estimated results of the microstrain were reported to be 0.0010, 0.0023 and 0.0020. Subsequently, as a consequence of distinct peak profile options, the projected average crystallite size by both approaches was distinct. The UV–vis spectroscopy analysis reveals that Sm and Eu doped materials exhibit absorption bands around 402 nm and 396 nm and depicts the declining band gap values. The Photoluminescence (PL) spectra at 402 nm and 395 nm excitation wavelengths exhibited the distinctive emissions of both Sm3+ (4G5/2 → 6H7/2) and Eu3+ (5D0 → 7F2) ions emanating due to the intra-configurational f - f and 4 f − 4 f transitions. Finally, the CIE diagram explicitly demonstrates that the Sm and Eu-modified materials reveal their exceptional color purity. McCamy’s approach was used to determine various parameters of trivalent rare-earth doped materials. The correlated color temperature (

T

CCT

) and their coordinates

T

CCT

(ζ, β) was found to be 2287 K, 1900 K, 0.281, 0.632, and 0.302, 0.681 respectively. Temperature-dependent emission spectra exhibit excellent color and thermal stability at high temperatures. The obtained results in this study indicate that the synthesized luminescent materials can potentially be used in white light-emitting diode applications.
Prediction of anaerobic digestion performance by quantum convolutional reconstruction gated recurrent neural network*
Authors: Hou Dong , Che Xuanxuan , Li Feifei , Dong Yumin 
Published: April 2024

Abstract
Methane as a renewable energy source has become a hot topic in recent years. Methane is a bioenergy source produced during the anaerobic digestion of organic waste, and the anaerobic digestion process must be monitored and controlled to produce the required amount of methane in a stable manner. Mathematical modeling is used to simulate digester operation to predict the biogas production from anaerobic digestion, to avoid reactor loading or performance degradation, and to ensure efficient operation of the system. In this paper, a Quantum Convolutional Reconstruction Gated Recurrent Neural Network is proposed. The original data features are extracted by convolutional neural network to reduce the dimensionality and retain the information, the parameterized quantum circuit is integrated in the gating recurrent unit, and the quantum reset gate and quantum update gate are constructed. The information extracted by the Convolution Neural networks is input into the quantum gated recurrent neural network, and the quantum storage unit integrates the information into the hidden layer state, thus processing the hidden layer state information more efficiently. The experimental results show that the prediction accuracy of the A Quantum Convolution Reconstructed Gated Recurrent Neural Network is improved from 81.95 to 88.21%, and the MAE value is reduced from 54.53% to 37.38%.
Quantum correlations in a chain-type quantum network
Authors: Qi Xiaofei , Zhai Aihong , Yang Lihua 
Published: April 2024

Abstract
A quantum network concerns several independent entangled resources and can create strong quantum correlations by performing joint measurements on some observers. In this paper, we discuss an n-partite chain network with each of two neighboring observers sharing an arbitrary Bell state and all intermediate observers performing some positive-operator-valued measurements with parameter λ. The expressions of all post-measurement states between any two observers are obtained, and their quantifications of Bell nonlocality, Einstein–Podolsky–Rosen steering and entanglement with different ranges of λ are respectively detected and analyzed.
Effects of triaxial deformation on the fission barrier in the Z = 118 − 120 nuclei*
Authors: Chai 柴 Qing-Zhen 清祯 , Wang 王 Jia-Li 佳利 , Liu 刘 Xing-Han 星汉 
Published: April 2024

Abstract
By using potential energy surface (PES) calculations in the three-dimensional space (β
2, γ, β
4) within the framework of the macroscopic-microscopic model, the fission trajectory and fission barrier for Z = 118(Og), 119, 120 nuclei has been systematically investigated. The calculated PES includes macroscopic liquid-drop energy, microscopic shell correction and pairing correction. Taking the 294Og176 nucleus as an example, we discuss the next closed shell after Z = 82 and N = 126 with the calculated Woods–Saxon single-particle levels. Then, the results of PES in 294Og is illustrated from the (X, Y) scale to the (β
2, γ) scale. The γ degree of freedom reveals the shape evolution clearly during the fission process. The structure near the minimum and saddle point of the PES in the Z = 118, 119, 120 nuclei is demonstrated simultaneously. Based on the potential energy curves, general trends of the evolution of the fission barrier heights and widths are also studied. The triaxial deformation in these superheavy mass regions plays a vital role in the first fission barrier, showing a significant reduction in both triaxial paths. In addition, the model-dependent fission barriers of proton-rich nuclei 295Og, 296119, and 297120 are analyzed briefly. Our studies could be valuable for synthesizing the superheavy new elements in the forthcoming HIAF and other facilities.
Multi-functional metasurface: ultra-wideband/multi-band absorption switching by adjusting guided-mode resonance and local surface plasmon resonance effects
Authors: Li Wenxin , Cheng Shubo , Zhang Huafeng , Yi Zao , Tang Bin , Ma Can , Wu Pinghui , Zeng Qingdong , Raza Rizwan 
Published: April 2024

Abstract
This study introduces an innovative dual-tunable absorption film with the capability to switch between ultra-wideband and narrowband absorption. By manipulating the temperature, the film can achieve multi-band absorption within the 30–45 THz range or ultra-wideband absorption spanning 30–130 THz, with an absorption rate exceeding 0.9. Furthermore, the structural parameters of the absorption film are optimized using the particle swarm optimization (PSO) algorithm to ensure the optimal absorption response. The absorption response of the film is primarily attributed to the coupling of guided-mode resonance and local surface plasmon resonance effects. The film’s symmetric structure enables polarization incoherence and allows for tuning through various means such as doping/voltage, temperature and structural parameters. In the case of a multi-band absorption response, the film exhibits good sensitivity to refractive index changes in multiple absorption modes. Additionally, the absorption spectrum of the film remains effective even at large incidence angles, making it highly promising for applications in fields such as biosensing and infrared stealth.
Development of 400-μW cryogen-free dilution refrigerators for quantum experiments
Authors: Guan 关 Xiang 翔 , Fan 樊 Jie 洁 , Bian 边 Yong-Bo 勇波 , Cheng 程 Zhi-Gang 智刚 , Ji 姬 Zhong-Qing 忠庆 
Published: April 2024

Abstract
We have successfully developed cryogen-free dilution refrigerators with medium cooling power that can be applied to quantum experiments. Breakthroughs have been made in some key technologies and components of heat switches and dilution units. Our prototype has been running continuously and stably for more than 100 hours below 10 mK, with a minimum temperature of 7.6 mK and a cooling power of 450 μW at 100 mK. At the same time, we have also made progress in the application of dilution refrigerators, such as quantum computing, low-temperature detector, and magnet integration. These indicators and test results indicate good prospects for application in physics, astronomy, and quantum information.
Performance enhancement of a viscoelastic bistable energy harvester using time-delayed feedback control
Authors: Huang 黄 Mei-Ling 美玲 , Yang 杨 Yong-Ge 勇歌 , Liu 刘 Yang 洋 
Published: April 2024

Abstract
This paper focuses on the stochastic analysis of a viscoelastic bistable energy harvesting system under colored noise and harmonic excitation, and adopts the time-delayed feedback control to improve its harvesting efficiency. Firstly, to obtain the dimensionless governing equation of the system, the original bistable system is approximated as a system without viscoelastic term by using the stochastic averaging method of energy envelope, and then is further decoupled to derive an equivalent system. The credibility of the proposed method is validated by contrasting the consistency between the numerical and the analytical results of the equivalent system under different noise conditions. The influence of system parameters on average output power is analyzed, and the control effect of the time-delayed feedback control on system performance is compared. The output performance of the system is improved with the occurrence of stochastic resonance (SR). Therefore, the signal-to-noise ratio expression for measuring SR is derived, and the dependence of its SR behavior on different parameters is explored.
A wealth distribution model with a non-Maxwellian collision kernel
Authors: Meng 孟 Jun 俊 , Zhou 周 Xia 霞 , Lai 赖 Shaoyong 绍永 
Published: April 2024

Abstract
A non-Maxwellian collision kernel is employed to study the evolution of wealth distribution in a multi-agent society. The collision kernel divides agents into two different groups under certain conditions. Applying the kinetic theory of rarefied gases, we construct a two-group kinetic model for the evolution of wealth distribution. Under the continuous trading limit, the Fokker–Planck equation is derived and its steady-state solution is obtained. For the non-Maxwellian collision kernel, we find a suitable redistribution operator to match the taxation. Our results illustrate that taxation and redistribution have the property to change the Pareto index.
Proposal for a realtime Einstein-synchronization-defined satellite virtual clock
Authors: Yan 严 Chenhao 晨皓 , Tang 汤 Xueyi 雪逸 , Wang 王 Shiguang 时光 , Meng 孟 Lijiaoyue 李皎悦 , Sun 孙 Haiyuan 海媛 , He 何 Yibin 奕彬 , Wang 王 Lijun 力军 
Published: April 2024

Abstract
Realization of high performance satellite onboard clock is vital for various positioning, navigation, and timing applications. For further improvement of the synchronization-based satellite time and frequency references, we propose a geosynchronous (GEO) satellite virtual clock concept based on ground–satellite synchronization and present a beacon transponder structure for its implementation (scheduled for launch in 2025), which does not require atomic clocks to be mounted on the satellite. Its high performance relies only on minor modifications to the existing transponder structure of GEO satellites. We carefully model the carrier phase link and analyze the factors causing link asymmetry within the special relativity. Considering that performance of such synchronization-based satellite clocks is primarily limited by the link’s random phase noise, which cannot be adequately modeled, we design a closed-loop experiment based on commercial GEO satellites for pre-evaluation. This experiment aims at extracting the zero-means random part of the ground-satellite Ku-band carrier phase via a feedback loop. Ultimately, we obtain a 1σ value of 0.633 ps (two-way link), following the Gaussian distribution. From this result, we conclude that the proposed real-time Einstein-synchronization-defined satellite virtual clock can achieve picosecond-level replication of onboard time and frequency.
Low-energy spin dynamics in a Kitaev material Na3Ni2BiO6 investigated by nuclear magnetic resonance
Authors: Shi 史 Xinyu 昕雨 , Cui 崔 Yi 祎 , Shangguan 上 Yanyan 官艳艳 , Xu 徐 Xiaoyu 霄宇 , Wu 吴 Zhanlong 占龙 , Hu 胡 Ze 泽 , Li 李 Shuo 硕 , Du 杜 Kefan 柯帆 , Chen 陈 Ying 颖 , Ma 马 Long 龙 , Liu 刘 Zhengxin 正鑫 , Wen 温 Jinsheng 锦生 , Zhang 张 Jinshan 金珊 , Yu 于 Weiqiang 伟强 
Published: April 2024

Abstract
We perform 23Na nuclear magnetic resonance (NMR) and magnetization measurements on an S = 1, quasi-2D honeycomb lattice antiferromagnet Na3Ni2BiO6. A large positive Curie–Weiss constant of 22.9 K is observed. The NMR spectra at low fields are consistent with a zigzag magnetic order, indicating a large easy-axis anisotropy. With the field applied along the c
* axis, the NMR spectra confirm the existence of a 1/3-magnetization plateau phase between 5.1 T and 7.1 T. The transition from the zigzag order to the 1/3-magnetization plateau phase is also found to be a first-order type. A monotonic decrease of the spin gap is revealed in the 1/3-magnetization plateau phase, which reaches zero at a quantum critical field H
C ≈ 8.35 T before entering the fully polarized phase. These data suggest the existence of exchange frustration in the system along with strong ferromagnetic interactions, hosting the possibility for Kitaev physics. Besides, well below the ordered phase, the 1/T
1 at high fields shows either a level off or an enhancement upon cooling below 3 K, which suggests the existence of low-energy fluctuations.