bluuebunny/crossref_metadata_2025_split huggingface dataset:
A 6.78-MHz distance-insensitive wireless power transfer system with a dual-coupled L-type matching network
Authors: Han Gao , Liu Yanming , Li Qian , Xing Zikang , Zhang Zheng 
Published: May 2021

A 6.78-MHz wireless power transfer (WPT) system can achieve a long transmission distance, which is based on magnetically coupled resonant technology. Due to its high quality factor coils, the system performance is greatly affected by position displacement. In this paper, a weakly coupled and distance-insensitive WPT system with a dual-coupled L-type matching network was proposed. To improve displacement tolerance, the proposed system used a dual mutual inductance matching network, which did not require feedback to change capacitance or inductance dynamically. To remain lightweight, printed multi-coils without ferrites were used. To obtain a higher efficiency over a weakly coupled distance, a series of parameters were optimized, i.e., the optimal dimension, the matching distance, and the real center. To verify the output performance in X/Y/Z-axis displacements, a prototype with a maximum output power of 50 W was created, and a DC–DC efficiency of 75%–81% was achieved in a Z-axis displacement of ±15 mm and in an X/Y-axis displacement of ±20 mm.
Perspectives
Authors: Okedu Kenneth 
Published: May 2021

Onshore Wind Farms: Dynamic Stability and Applications in Hydrogen Production offers an up-to-date discussion of new technologies and methods for building wind farms and upgrading existing wind turbines. The effective operation of grid-connected wind farms is quite a challenge for grid operators, largely due to the transient nature of wind energy. This book covers improvements in dynamic performance of a grid in combination with other sources including nuclear power, hydropower, and thermal turbines. It investigates the effects of devices and control strategies that potentially improve wind energy capture and stabilize existing fixed-speed wind turbines in grid-connected wind farms.
This timely book:Includes new technology for improved wind turbinesFeatures developments for improving the stability of grids that rely on wind powerCovers applications such as hydrogen fuel production and DC fuel cells
Relevant for researchers and engineers working in wind energy, this book is also suitable for students interested in grid development or other forms of renewable energy. It is also of interest to wind energy policy planners and analysts.
Toll9 fromBombyx morifunctions as a pattern recognition receptor that shares features with Toll-like receptor 4 from mammals
Authors: Zhang Ruonan , Li Xiaofeng , Zhang Jie , Li Yanjun , Wang Yuan , Song Yuhang , Ren Feifei , Yi Huiyu , Deng Xiaojuan , Zhong Yangjin , Cao Yang , Strand Michael R. , Yu Xiao-Qiang , Yang Wanying 
Published: May 2021

SignificanceToll/Toll-like receptors are key regulators of the innate immune system in both invertebrates and vertebrates. However, while mammalian Toll-like receptors function as pattern recognition receptors that directly bind microbe-associated ligands, arthropod Tolls are generally thought to be activated by Spätzle cytokines. Here, we show that Toll9 from the silkmothBombyx morifunctions as a pattern recognition receptor that binds lipopolysaccharide. Our results provide a link for both structural and functional conservation between an insect Toll and a mammalian Toll-like receptor family member.
Zoonotic diseases: a One Health perspective
Authors: Samadi Assadullah , Hailat Nabil 
Published: May 2021

Abstract
The emergence and re-emergence of infectious diseases including zoonoses and persistence of neglected zoonotic diseases threaten the global health and economy of rural societies now more than any time in the history of humanity. Animals are the main reservoirs of zoonotic disease agents, and zoonotic pathogens are transmitted to humans by direct contacts with infected animals or indirectly through animal products and the environment. A range of factors contribute in persistence and emergence of zoonoses, and globalization, climate change, and lack of proper coordination among the governmental organization responsible for human and animal health are the key indicators. Given the shared nature of zoonotic diseases and the spread, emergence, and re-emergence of zoonotic diseases in human and animal populations, integrated One Health is the only effective approach to solve this most important health issue. In this article, different aspects of zoonotic diseases, their role in incremental poverty, and the needs for integrated activities for their control and management are reviewed and discussed in detail.
Geometrically thick tori around compact objects with a quadrupole moment
Authors: Memmen Jan-Menno , Perlick Volker 
Published: May 2021

Abstract
We study geometrically thick perfect-fluid tori with constant specific angular momentum, so-called ‘Polish doughnuts’, orbiting deformed compact objects with a quadrupole moment. More specifically, we consider two different asymptotically flat, static and axisymmetric vacuum solutions to Einstein’s field equation with a non-zero quadrupole moment, the q-metric and the Erez–Rosen spacetime. It is our main goal to find features of Polish doughnuts in these two spacetimes which qualitatively distinguish them from Polish doughnuts in the Schwarzschild spacetime. As a main result we find that, for both metrics, there is a range of positive (Geroch–Hansen) quadrupole moments which allows for the existence of double tori. If these double tori fill their Roche lobes completely, their meridional cross-section has the shape of a fish, with the body of the fish corresponding to the outer torus and the fish-tail corresponding to the inner torus. Such double tori do not exist in the Schwarzschild spacetime.
Thin shell collapse in Kiselev geometry
Authors: Saadati R , Shojai F 
Published: May 2021

Abstract
We present some new aspects of Kiselev black hole and then study the null and timelike thin shell collapse in this space-time. For the latter, we show that Kiselev black hole can be matched to de Sitter core with a thin timelike dust shell to produce a non-singular space-time. It is argued that for timelike hypersurface, the equation of state parameter must be non-negative. Using Barrabès–Israel junction conditions, the equation of motion of the shell is obtained. The stability of stationary solutions of the shell is discussed and some appropriate ranges for the parameters of shell and Kiselev geometry are found for which a stable stationary black hole is constructed.
Stability of small charged anti-de Sitter black holes in the Robin boundary
Authors: Katagiri Takuya , Harada Tomohiro 
Published: May 2021

Abstract
We analytically and numerically study quasinormal frequencies (QNFs) of neutral and charged scalar fields in the charged anti-de Sitter (AdS) black holes and discuss the stability of the black holes in terms of the QNFs. We focus on the range of the mass squared μ
2 of the scalar fields for which the Robin boundary condition parametrized by ζ applies at the conformal infinity. We find that if the black hole of radius r
+ and charge Q is much smaller than the AdS length ℓ, the instability of the charged scalar field can be understood in terms of superradiance in the reflective boundary condition. Noting that the s-wave normal frequency in the AdS spacetime is a decreasing function of ζ, we find that if |eQ|ℓ/r
+ is greater than

(

3
+

9
+
4

μ

2

ℓ

2

)

/
2

, where e is the charge of the scalar field, the black hole is superradiantly unstable irrespectively of ζ. On the other hand, if |eQ|ℓ/r
+ is equal to or smaller than this critical value, the stability crucially depends on ζ and there appears a purely oscillating mode at the onset of the instability. We argue that as a result of the superradiant instability, the scalar field gains charge from the black hole and energy from its ambient electric field, while the black hole gives charge to the scalar field and gains energy from the scalar field but decreases its asymptotic mass parameter.
Temperature stable rare earth magnetic powder Sm-Fe-N based micro magnets with remanence enhanced by easy axis alignment and its application in MEMS actuator
Authors: Wang Huayu , Matsuura Masashi , Yamada Shusuke , Sugimoto Satoshi , Tanaka Shuji 
Published: May 2021

Abstract
In this paper, we report an actuator with a magnet made of novel rare earth magnetic powder Sm-Fe-N with diameter of 2 µm to 5 µm. Micro magnets were fabricated by mixing the magnetic powder with wax at temperature of 90 °C. Alignment of the easy axis process was employed to enhance the remanence of the micro magnets. A 8 T strong pulse magnetic field was utilized to magnetize the micro magnets. The properties of magnetic powder were revealed with vibrating sample magnetometer by measuring micro magnets with various magnetic powder weight loading percentages. In the best condition, the remanence reaches 0.9 T and the energy product reaches 70 kJ m−3. After that, the electromagnetic actuator was fabricated by embedding the magnetic powder in deep-reactive-ion-etched Si cavity with wax binder and parylene capping. The completed microelectromechanical system structure was mounted on a four-layer printed circuit board with embedded coils. Upon the application of a direct current for actuation, a displacement of 180 μm was obtained from a device volume of only 1.5 mm3 with a low actuation power consumption of 11.5 mW.
Quantisation of the elliptical Penning trap
Authors: Crimin Frances , Garraway Barry M , Verdú José L 
Published: May 2021

Abstract
We present the quantum theory of the elliptical Penning trap, i.e. the general case where the cylindrical symmetry of the electrostatic trapping potential around the trapping magnetic field axis is broken. The theory applies to both slightly and highly elliptical traps, where it is shown that the difference between the quantum states of particles in these traps corresponds to a variation of the degree of squeezing of their motional modes in the xy-plane. In a trap with tunable ellipticity, such as the Geonium Ghip planar Penning trap, it follows that control of the ellipticity via the trapping voltages enables squeezing of the quantum states of the particle. We discuss the adiabatic preparation of such squeezed states, which follows naturally from the appearance of an avoided crossing between the diabatic levels of the coupled motional states of the particle.
Gate-tunable chiral phonons in low-buckled group-IVA monolayers
Authors: Wang Hanyu , Zhou Zhichao , Chen Hao , Xia Chongqun , Zhang Lifa , Li Xiao 
Published: May 2021

Abstract
We investigate the electric response of chiral phonons on the low-buckled group-IVA monolayers by performing first-principles calculations. The vertical electric field breaks the degeneracy of phonon modes at high-symmetry ±K points of the phonon Brillouin zone, and the size of the phononic gap is proportional to the strength of the electric field. The gapped phonon modes at ±K possess chiralities with considerable phonon circular polarizations and discrete phonon pseudoangular momenta. The chiralities of phonons are robust against the variation of the field strength, but reversed by changing the field direction. Electric control of chiral phonons adds a new dimension to the study of chiral phonons, which has potential use in the design of phononic and valley devices.
Coarse-grained molecular dynamics simulation of cis-1,4-polyisoprene with silica nanoparticles under extreme uniaxial tension
Authors: Yuan Bin , Zeng Fanlin , Peng Chao , Wang Youshan 
Published: May 2021

Abstract
Coarse-grained (CG) cis-1,4-polyisoprene (PI) models with multiple silica nanoparticles (NPs) are built to study the effect of NPs and crosslinks in the uniaxial tensile simulation. The potential functions of the CG models are obtained mainly via the iterative Boltzmann inversion method. The tensile simulation results show that the grafted silica NPs and the crosslinked structure play reinforcing roles while the smooth silica NPs do the opposite, which have the similar trends with the experiment results. The differences of mechanical properties for these models are studied from different microscopic aspects, such as the network of NPs, the bond lengths, the free molecular chains, the entanglements, the stress and strain distribution and the microvoid evolution. As a result, the main reasons for the weakening of PI models with smooth silica NPs come from the weak interfacial interaction, the inhomogeneity of structural deformation and the reduction of the number of entanglements. However, if there are graft chains, the interfacial interaction can be enhanced by entangling with the matrix molecular chains. The graft chains can make it possible for the aggregated NPs to separate and can hinder the growth of microvoids at the interface. In addition, the inconsistency of the stress and strain distributions at the microscopic level is verified and the nucleation mechanism of microvoids is believed to be caused by the local violent movement of molecular chains.
Tuning critical resolved shear stress ratios for bcc-titanium Ti21S via an automated data analysis approach
Authors: Venkatraman Kaustubh , Ben Haj Slama Meriem , Taupin Vincent , Maloufi Nabila , Guitton Antoine 
Published: May 2021

Abstract
We introduce a novel method for automated slip trace detection and analysis based on the Hough transform algorithm and apply it to electron channeling contrast imaging micrographs. This is further augmented with an automation procedure for the determination of slip-trace crystallography in conjunction with orientation data acquired via electron backscattered diffraction. Automation is required for faster indexation of the slip traces and for more reliable statistical studies. The automation procedure was applied to different regions of interest on a β-Ti21S sample loaded in situ in tension. β-Ti21S is a bcc alloy with 48 slip systems available to accommodate plastic deformation, including all complexities associated with pencil glide. Multiple regions of interest were analyzed using the automation procedure. The acquired slip distribution statistics reveals that the majority of the slip traces belong to the {112} and {123} slip families. The deformation response of the observed regions of interest was also simulated using a full-field crystal plasticity model implemented in DAMASK, based on a phenomenological power law based constitutive formulation, incorporating all potentially active 48 slip systems. The slip system activity distribution from modelling is compared with the slip distribution statistics observed experimentally. The plasticity parameters for β-Ti21S were taken from the literature and the critically resolved shear stress (CRSS) values were adjusted to match the experimentally observed yield stress value. We begin with uniform CRSS ratios for all three potential slip system families and tune the CRSS ratios to match the slip-distribution statistics experimentally, keeping the average CRSS value the same for all cases. Thus, a method has been introduced to tune average CRSS values and ratios by considering both the macroscopic stress–strain response and the locally observed slip-distribution statistics, obtained via automated slip trace detection procedure.
Unique photoluminescence response of MoS2 quantum dots over a wide range of As (III) in aqueous media
Authors: Ansari Jamilur R , Naseh Md Farhan , Singh Neelam , Sarkar Tapan , Datta Anindya 
Published: May 2021

Abstract
We report the solvothermal synthesis of MoS2 based quantum dots (QDs) and the performance evaluation of bare QDs for the detection of aqueous As (III) oxidative state at room temperature and neutral pH over a vast range (0.1−1000 ppb). Concentration-dependent photoluminescence (PL) of the QDs enhances up to 50 ppb and then suppresses till 1000 ppb. It shows two distinctive slopes for enhancement and suppression. The enhancement is possibly due to the passivation of trap states or defects. The formation of tiny glassy As2S3 particles on the QD surface may be the possible reason for suppression. The pattern of optical absorption of QDs follows the similar patterns of PL. Still, it shows an enhanced absorbance in the near UV range below ≤300 nm, which increases with As (III) concentration up to 50 ppb and then decreases following the PL pattern. The MoS2 QDs were characterized by using transmission electron microscopy, x-ray diffraction, UV−Vis, and PL spectroscopy. The enhancement and suppression results were excellently fitted with the modified Stern−Volmer equation. The detection of arsenic is possible using these linear fit equations as calibration curves.
Experimental demonstration of the thermodynamic temperature unit kelvin
Authors: Alper M Patan 
Published: May 2021

Abstract
This study focuses on the experimental demonstration of the definition of kelvin using a triple point of water (TPW) cell and estimates the measurement uncertainty. The first part of this article is to construct the measurement setup and perform the measurements. The second stage is related with the calculation of uncertainty according to guides to the expression of uncertainty in measurement. The experiment in this study can be a practical and convenient method to show the unit as the fraction 1/273.16 of the thermodynamic temperature of the TPW, 273.16 K.
Probing P- and CP-violation in dark matter interactions
Authors: Catena Riccardo , Hagel Joakim , Yaguna Carlos E. 
Published: May 2021

Abstract
Discrete symmetries played a central role in elucidating the
structure of the weak interactions, and they will probably be
equally crucial regarding the interactions of the dark matter (DM)
particle — whose nature remains elusive. In this work we show that
signals in future direct detection experiments can be used to test,
in a model-independent way, for P- and CP-violation in DM-nucleus
interactions. The analysis is performed within the most general
effective theory for non-relativistic spin-0 DM-nucleus interactions
mediated by the exchange of a heavy particle. Assuming an idealised
xenon detector, we calculate the expected number of DM signal events
required to reject P and CP invariant dark matter-nucleus
interactions. For a DM mass of 30 GeV (or higher), this number lies
between about 10 and 300 DM signal events, depending on how P and CP
invariance are modeled. Future direct detection experiments,
therefore, have the potential to reveal P- and CP-violation in DM
interactions, making a decisive step toward the identification of
the DM particle.
Updated constraints on decaying cold dark matter
Authors: Nygaard Andreas , Tram Thomas , Hannestad Steen 
Published: May 2021

Abstract
In this paper we update the constraints on the simple
decaying cold dark matter (DCDM) model with dark radiation (DR) as
decay product. We consider two different regimes of the lifetime,
i.e. short-lived and long-lived, and use the most recent CMB data
from Planck (2018) to infer new constraints on the decay parameters
with which we compare the constraints inferred by the previous
Planck data (2015). We hereby show that the newest CMB data
constrains the fractional amount of DCDM twice as much as the
previous data in the long-lived regime, leading to our current best
2σ upper bound of f
dcdm < 2.44%. In the short-lived
regime, we get a slightly looser 2σ upper bound of
f
dcdm < 13.1% compared to the previous CMB data. If we
include Baryonic Acoustic Oscillations data from BOSS DR-12, the
constraints in both the long-lived and the short-lived regimes relax
to f
dcdm < 2.62% and f
dcdm < 1.49%, respectively. We
also investigate how this model impacts the Hubble and σ8
tensions, and we find that each of the decay regimes can slightly
relieve a different one of the tensions. The model can thus not
accommodate both tensions at once, and the improvements on each are
not significant. We furthermore improve on previous work by
thoroughly analysing the impacts of short-lived DCDM on the
radiation density and deriving a mapping between short-lived DCDM
and a correction, ΔN
eff, to the effective number of
massless neutrino species.
Additive manufacturing of polymer composites with nano-titania inclusions
Authors: Shishkovsky I V , Scherbakov V I 
Published: May 2021

AbstractThis study focuses on the possibility of controlling the morphology, phase-structural transformations, shape and mechanical features of a nano ceramic-polymer matrix by adding nano-titanium dioxide (TiO2) to the polymer during a selective laser sintering process. 3D parts were manufcatured from dissimilar polymers and nano-titania powder compositions with different volume ratios. Evaluations of the microstructural characteristics of the 3D samples were performed using optical and scanning electron microscopy (SEM) and x-ray analysis. SEM indicated a heterogeneous distribution of nano-titania in the polymer matrix. The x-ray patterns confirmed the presence of the original phase (TiO2) with some changes, which is useful for biomedical applications. Heating the 3D parts for approximately 30 additional minutes in the oven in the range of 50 °C–250 °C allowed us to reveal the conditions necessary for changing the porosity of the ceramic–polymer matrix, without requiring a polymer binder or titania framework fixing.
Stretchable gold nanowire-based cuff electrodes for low-voltage peripheral nerve stimulation
Authors: Lienemann Samuel , Zötterman Johan , Farnebo Simon , Tybrandt Klas 
Published: May 2021

Abstract

Objective. Electrical stimulation of the peripheral nervous system (PNS) can treat various diseases and disorders, including the healing process after nerve injury. A major challenge when designing electrodes for PNS stimulation is the mechanical mismatch between the nerve and the device, which can lead to non-conformal contact, tissue damage and inefficient stimulation due to current leakage. Soft and stretchable cuff electrodes promise to tackle these challenges but often have limited performance and rely on unconventional materials. The aim of this study is to develop a high performance soft and stretchable cuff electrode based on inert materials for low-voltage nerve stimulation. Approach. We developed 50 µm thick stretchable cuff electrodes based on silicone rubber, gold nanowire conductors and platinum coated nanowire electrodes. The electrode performance was characterized under strain cycling to assess the durability of the electrodes. The stimulation capability of the cuff electrodes was evaluated in an in vivo sciatic nerve rat model by measuring the electromyography response to various stimulation pulses. Main results. The stretchable cuff electrodes showed excellent stability for 50% strain cycling and one million stimulation pulses. Saturated homogeneous stimulation of the sciatic nerve was achieved at only 200 mV due to the excellent conformability of the electrodes, the low conductor resistance (0.3 Ohm sq−1), and the low electrode impedance. Significance. The developed stretchable cuff electrode combines favourable mechanical properties and good electrode performance with inert and stable materials, making it ideal for low power supply applications within bioelectronic medicine.
Performance of the CMS Zero Degree Calorimeters in pPb collisions at the LHC
Authors: Surányi O. , Al-Bataineh A. , Bowen J. , Cooper S. , Csanád M. , Hagopian V. , Ingram D. , Ferraioli C. , Grassi T. , Kellogg R. , Laird E. , Martinez G. , McBrayer W. , Mestvirishvili A. , Mignerey A. , Murray M. , Nagy M. , Onel Y. , Siklér F. , Toms M. , Veres G. , Wang Q. 
Published: May 2021

Abstract
The two Zero Degree Calorimeters (ZDCs) of the CMS
experiment are located at ± 140 m from the collision point and
detect neutral particles in the |η| > 8.3 pseudorapidity
region. This paper presents a study on the performance of the ZDC in
the 2016 pPb run. The response of the detectors to ultrarelativistic
neutrons is studied using in-depth Monte Carlo simulations. A method
of signal extraction based on template fits is presented, along with
a dedicated calibration procedure. A deconvolution technique for the
correction of overlapping collision events is discussed.