bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pulsed plasma chemical synthesis of Fe2O3@TiO2 core–shell nanocomposites
Authors: Kholodnaya Galina , Sazonov Roman , Ponomarev Denis , Sivkov Alexander , Shanenkov Ivan , Konusov Fedor , Gadirov Ruslan 
Published: June 2020

The Letter presents the results of the experimental investigation on the synthesis of core–shell structured nanocomposites. Iron oxide, which served as a nucleus in the composite, was synthesised using the plasma dynamic method. The composite shell was titanium oxide produced by the pulsed plasma chemical method. Average sizes of nanoparticles were estimated between 50 and 150 nm in the Fe2O3@TiO2 core–shell structured composite nanoparticles using TEM. A distinctive feature of the morphology of the synthesised Fe2O3@TiO2 core–shell is that the core entirely encapsulates clusters of titanium oxide nanoparticles. The wall thickness of the coating is 5–10 nm. The spectral dependence of the absorption coefficient α(hν) was calculated for the Fe2O3@TiO2 composite. The interband absorption parameters are determined in the energy intervals Δ′(hν) upon approximation of the absorption spectra. The bandgap for indirect and direct allowed transitions is 1.36 and 1.97 eV for and , respectively.
Highly stable Au/Ag core–shell nanoparticles prepared via novel green approach for the abatement of nitro pollutants
Authors: Verma Vishal , Singh Maninder , Pal Singh Prit , Singh Jagpreet , Rawat Mohit 
Published: June 2020

The development of a benign, cost‐effective and eco‐friendly system for the removal of pollutants from water is an ongoing challenge. In this regard, the authors first time explored a clean and sustainable mean for the synthesis of Au/Ag core–shell nanoparticles (NPs) using Ananas comosus leaves extract as a reducing and stabilising agent. Spectroscopic and microscopic techniques confirmed the formation of Au/Ag core–shell NPs with an average size range between 5 and 10 nm. The synthesised Au/Ag core–shell NPs showed the excellent catalytic potential for the reduction of 4‐nitrophenol into 4‐aminophemol within 15 min. Kinetic study explicates that the catalytic reaction obeys the pseudo‐first‐order kinetic law with an apparent rate constant (kapp) of 0.03 min−1. Moreover, Au–Ag core–shell NPs showed exceptional stability over a long period (three months). Thus, this study provides a positive step towards the development of novel green catalysts.
Ionization: a possible explanation for the difference of mean disk sizes in star-forming regions
Authors: Kuffmeier M. , Zhao B. , Caselli P. 
Published: June 2020

Context. Surveys of protoplanetary disks in star-forming regions of similar age revealed significant variations in average disk mass in some regions. For instance, disks in the Orion Nebular Cluster (ONC) and Corona Australis (CrA) are on average smaller than disks observed in Lupus, Taurus, Chamaeleon I, or Ophiuchus.
Aims. In contrast to previous models that studied the truncation of disks at a late stage of their evolution, we investigate whether disks may already be born with systematically smaller disk sizes in more massive star-forming regions as a consequence of higher ionization rates.
Methods. Assuming various cosmic-ray ionization rates, we computed the resistivities for ambipolar diffusion and Ohmic dissipation with a chemical network, and performed 2D nonideal magnetohydrodynamical protostellar collapse simulations.
Results. A higher ionization rate leads to stronger magnetic braking, and hence to the formation of smaller disks. Accounting for recent findings that protostars act as forges of cosmic rays and considering only mild attenuation during the collapse phase, we show that a high average cosmic-ray ionization rate in star-forming regions such as the ONC or CrA can explain the detection of smaller disks in these regions.
Conclusions. Our results show that on average, a higher ionization rate leads to the formation of smaller disks. Smaller disks in regions of similar age can therefore be the consequence of different levels of ionization, and may not exclusively be caused by disk truncation through external photoevaporation. We strongly encourage observations that allow measuring the cosmic-ray ionization degrees in different star-forming regions to test our hypothesis.
Longitudinal drift of Tayler instability eigenmodes as a possible explanation for super-slowly rotating Ap stars
Authors: Kitchatinov L. L. , Potravnov I. S. , Nepomnyashchikh A. A. 
Published: June 2020

Context. Rotation periods inferred from the magnetic variability of some Ap stars are incredibly long, exceeding ten years in some cases. An explanation for such slow rotation is lacking.
Aims. This paper attempts to provide an explanation of the super-slow rotation of the magnetic and thermal patterns of Ap stars in terms of the longitudinal drift of the unstable disturbances of the kink-type (Tayler) instability of their internal magnetic field.
Methods. The rates of drift and growth were computed for eigenmodes of Tayler instability using stellar parameters estimated from a structure model of an A star. The computations refer to the toroidal background magnetic field of varied strength.
Results. The non-axisymmetric unstable disturbances drift in a counter-rotational direction in the co-rotating reference frame. The drift rate increases with the strength of the background field. For a field strength exceeding the (equipartition) value of equal Alfven and rotational velocities, the drift rate approaches the proper rotation rate of a star. The eigenmodes in an inertial frame show very slow rotation in this case. Patterns of magnetic and thermal disturbances of the slowly rotating eigenmodes are also computed.
Conclusions. The counter-rotational drift of Tayler instability eigenmodes is a possible explanation for the observed phenomenon of super-slowly rotating Ap stars.
Die Addison-Krise im Notarztdienst oder „der Wolf im Schafspelz“
Authors: Köser Andrea , Gruenewald Matthias , Schulte Dominik , Reifferscheid Florian 
Published: June 2020

ZusammenfassungEndokrinologische Erkrankungen begegnen einem in der Notfallmedizin insgesamt selten, noch seltener kommt es vor, dass man mit einem lebensbedrohlichen endokrinologischen Notfall konfrontiert wird. Da dieser häufig mit unspezifischen Allgemeinsymptomen einhergeht und oft als solcher verkannt wird, soll dieser Beitrag auf dieses Krankheitsbild aufmerksam machen, sensibilisieren und ein Konzept zum präklinischen Umgang vorstellen.
An Uncommon Case of Isolated Superior Rectus Palsy
Authors: Mendonca Teena Mariet , K. Suprasanna , Rodrigues Gladys R. , Pai Shobha G. 
Published: June 2020

Abstract
Head injury associated with orbital trauma is commonly encountered in day-to-day practice. We report a rare case of orbital trauma resulting in isolated orbital “roof blow” in fracture in a 14-year-old child. The patient presented to us with diplopia and limitation of elevation of right eye after orbital trauma. Computed tomography of the orbits (2 mm sections) did not reveal fracture of the orbital floor. However, there was orbital roof “blow in” fracture with fracture fragment impingement on the superior rectus muscle. Patient was treated conservatively and spontaneous recovery of ocular motility was noted after a month.
Bacteria, garbage, insects and pigs
Authors: Simonsen Sandra 
Published: June 2020

AbstractThe present paper focuses on the symbolic meanings of metaphors and their potential social effects. Specifically, it examines the case of the Jewish Ultra-Orthodox “Ḥardakim” poster campaign distributed throughout Ultra-Orthodox communities in Israel in 2013. Following social group theory, the paper interprets the symbolic meanings of the main metaphors in the campaign in order to reconstruct the lifeworld of this religious group. On that basis, it offers a discussion of how metaphors were strategically utilized in order to draw social boundaries, uphold social norms and sanction group members who deviate from those. The paper’s empirical contribution is a case study of how symbolic meanings of metaphors as a part of propagandistic discourse targets and exploits social identities in order to mobilize collective emotions thereby provoking certain actions. It contributes theoretically by arguing that deeming norm-deviant group members internal threats is an efficient propaganda tool for maintaining intragroup behavioral codes.
Modeling of the impedance data of gadolinia doped ceria based actuators: a distribution function of relaxation times and machine learning approach
Authors: Paul Tanmoy 
Published: June 2020

Abstract
Gadolinia-doped ceria is one of the most extensively examined oxide ion conductors to exhibit large nonclassical electrostriction. The electromechanical response depends on the grain and grain boundaries which can be probed using electrochemical impedance spectroscopy. In this study, we have modeled the impedance spectra from buckled and free standing gadolinia doped ceria (Gd0.2Ce0.8O1.9) membrane in Al/Ti/Gd0.2Ce0.8O1.9/Ti/Al electromechanical device, at different AC excitation voltages (2, 4, 6, 8 and 10 V), and starting from room temperature to 100 °C. The analysis of impedance spectrum is commonly done by equivalent circuit modeling to obtain the resistors (

R

) and capacitors (

C

). However, to overcome the inherent problems like non-uniqueness, over fitting, presently different approaches have been chosen such as impedance spectroscopy genetic programming (ISGP) and artificial neural networks (ANNs). ISGP finds an analytic form of the distribution function of relaxation times (DFRTs) using impedance spectra. The DFRT analysis reveals that the grain boundary capacitance for the membrane ∼10−8–10−9 F decreases with increasing temperature and excitation voltages. Besides, neural networks, which are optimized by Bayesian regularization, simulate both the real and imaginary parts of impedance following the pattern of experimental data up to several Hz. The DFRT analysis on this simulated impedance data shows an effect of grain boundaries. Indeed, ANNs as optimized by Levenberg-Marquardt method, can estimate the

R

and

C

’s for present system with maximum relative errors of 24% and 22%, respectively.
Dynamic signatures of mode competition in optically injected high-β lasers
Authors: Lingnau Benjamin , Schicke David , Eichelmann Marcel , Lüdge Kathy 
Published: June 2020

Abstract
In this paper we theoretically investigate the statistical light-emission properties of an optically injected bimodal quantum-dot micropillar laser with high spontaneous emission rates. The nanostructured device is described in terms of a stochastic, semiclassically derived rate equation model. We focus on the stochastic switching dynamics between the two fundamental modes and correlate the results with an in-depth bifurcation analysis of the underlying deterministic dynamics. By analyzing different statistical measures, e.g. average intensity, auto- and cross-correlation functions, as well as dwell-time distributions, we give a road map on how to unravel the different dynamic regimes in the presence of large noise from experimentally accessible quantities.
Theoretical design of mid-infrared interband cascade lasers in SiGeSn system
Authors: Li Yuan , Song Zhigang , Li Zeyu , Sun Greg , Tan Chuan Seng , Fan Weijun , Wang Qi Jie 
Published: June 2020

Abstract
By carefully analyzing the latest composition-dependent parameters of SiGeSn alloys, we come to realize that this system could provide type-II energy band alignment at direct bandgap condition. The discovery inspires us to explore the mid-infrared interband cascade laser (ICL) in SiGeSn system. Based on the eight-band k ⋅ p model, we theoretically design three schemes of ICL, in which the active region and the carrier injectors are optimized simultaneously. Afterward, the properties of TE-mode optical gain spectrums and differential gain are investigated individually for each scheme. Furthermore, the spontaneous emission spectrums and radiative current density are also calculated. Our theoretical results indicate that the active region composed of double-electron and triple-hole quantum wells has the best gain performance, reaching 660 cm−1 for a single period of the ICL under 7.8 × 1018 cm−3 injected electron density. This work opens up another type of infrared lasers that can be developed from the group-IV system, offering a new pathway to achieving the monolithic integration in Si photonics.
Absolute cross sections of ultra-soft x-ray radiation in electron scattering upon atoms
Authors: Kornev A S , Zon B A , Amusia M Ya 
Published: June 2020

Synopsis
The soft-photon approximation (SPA) is shown to give quantitative interpretation of absolute measurement of bremsstrahlung (BrS) cross section, σ, on atomic targets in the region of large wavelengths λ, for which σ∼ 1/λ2.
Towards understanding the electronic structure and ion fragmentation patterns of indole and related compounds
Authors: Sa’adeh H , Plekan O , Ponzi A , Toffoli D , Bolognesi P , Chiarinelli J , Castrovilli M C , Vozzi C , Faccialà D , Devetta M , Ciavardini A , Avaldi L , Coreno M , Callegari C , Richter R , Prince K C 
Published: June 2020

Synopsis
Electronic structure and VUV-induced fragmentation of selected molecules of the indole family have been studied using valence photoemission spectroscopy (PES), core X-ray photoelectron spectroscopy (XPS), near-edge X-ray absorption fine structure (NEXAFS) and Photo-Electron Photo-Ion Coincidence (PEPICO).
Benchmark calculations for photoionization of neutral iron
Authors: Zatsarinny O , Bartschat K , Fernandez-Menchero L , Tayal S S 
Published: June 2020

Synopsis
The B-spline R-matrix method is used to investigate the photoionization of neutral iron from its ground and the lowest 43 excited states in the energy region from the ionization thresholds to 2 Ry. The sensitivity of the predictions is checked by comparing results obtained in different approximations. Including all terms from the 3d64p and 3d54s4p configu-rations considerably changes both the low-energy resonance structure and the background cross sections.
An investigation of photo-double ionization in benzene
Authors: Howard J , Sokell E , Bolognesi P , Avaldi L 
Published: June 2020

Synopsis
A photo-double ionization (PDI) coincidence technique has been used to study electron correlation as a function of photon impact energy on Benzene (C6H6). The simultaneous emission of two photoelectrons from the benzene π orbital has been measured using two sets of hemispherical electron energy analysers. Angle resolved single and coincidence photoelectron spectra are reported, providing new data on the PDI mechanism.
The Small Quantum System (SQS) Instrument at European XFEL: Results of commissioning and first experiments
Authors: Meyer M , Baumann T M , Achner A , Boll R , De Fanis A , Grychtol P , Ilchen M , Mazza T , Montaño J , Music V , Ovcharenko Y , Rennhack N , Rivas D E , Wagner R , Ziołkowski P , Rolles D , Walter P , Erk B , Keitel B , Plönjes E , Mann K , Lange S , Schäfer B , Chalupský J , Burian T , Juranova K , Vyšín L , Hájková V , Juha L 
Published: June 2020

Synopsis
The Small Quantum System (SQS) instrument on the soft X-ray undulator SASE3 of the European XFEL went into operation during 2018. We present first results from the instrument characterizing the focus properties and the time-of-flight as well as velocity map imaging spectrometers of the AQS chamber.
Ultrafast ionization and fragmentation dynamics of polycyclic atomatic hydro-carbons by XUV radiation
Authors: Manschwetus B , Chopra P , Tikhonov D , Köckert H , Gruet S , Lahl J , Maclot S , Peschel J , Steber A L , Lee J W L , Boll R , Bari S , Dörner S , Allum F , Erk B , He Lanhai , Passow C , Rompotis D , Lemmens A , Mason R , Heathcote D , Burt M , Wiese J , Johny M , Müller E , Ziaee F , Kazemi M M , Schirmel N , Olshin P , Cheng X , Ramm D , Trippel S , Mullins T , Rijs A , Küpper J , Vallence C , Brouard M , Rolles D , Johnsson P , Schnell M 
Published: June 2020

Synopsis
In the interstellar medium polycyclic aromatic hydrocarbon molecules (PAH) are exposed to strong ionizing radation leading to complex organic photochemistry. We investigated these ultrafast fragmentation reactions after ionization of the PAHs phenanthrene, fluorene and pyrene at a wavelength of 30.3 nm using pump probe spectroscopy at a free electron laser. We observe double ionization and afterwards hydrogen abstraction and acetylene loss with characteristic time scales for the reaction processes below one hundred femtoseconds.
Rydberg polyatomic molecules: Electronic structure and experimental proposal for their creation
Authors: González-Férez R , Rittenhouse S T , Schmelcher P , Sadeghpour H R 
Published: June 2020

Synopsis
We describe the electronic structure and main features of ultralong range Rydberg molecules formed by a Rydberg atom, either Rb or K, and the heteronuclear diatomic molecule KRb. By analyzing their electronic structure, we propose a protocol to create these molecules experimentally from a mixture of ultracold atoms and ultracold molecules.
Laser-Assisted Self Induced Feshbach Resonance : a new tool for controlling ultracold atomic collisions
Authors: Devolder A , Luc-Koenig E , Atabek O , Desouter-Lecomte M , Dulieu O 
Published: June 2020

Synopsis
We propose a new kind of Feshbach Resonance (FR) : the Laser-Assisted Self-Induced Feshbach Resonance (LASIFR), applicable for all mixtures of ultracold atoms. The interspecies scattering length characterizing elastic collisions, a key property for many applications of ultracold quantum gases, can be controlled by a LASIFR through the laser intensity and the frequency. It can be also used for the formation of ultracold polar molecules.
Quantum phases of biased bosonic ladders subject to a magnetic field
Authors: Qiao X , Zhang X B , Zhang A X , Yu Z F , Xue J K 
Published: June 2020

Synopsis
The quantum phase transition of the Plane Wave I phase, the Plane Wave II phase, and interestingly, a new phase named Moving Biased Vortex phase are revealed in the biased bosonic two-leg ladder system.
Atomic and molecular Auger decay in CHCl3 molecule
Authors: Vasconcelos D N , Santos A C F , Morcelle V , Macdonald M A , Sant’Anna M M , Tenório B N C , Rocha A B , Bonfin V B , Appathurai N , Zuin L 
Published: June 2020

Synopsis
The dissociation following Cl 2p core–shell excitation in CHCl3 molecule is studied. It is observed the presence of atomic Auger lines associated with the decay of dissociated Cl* atoms. Calculations were compared with the corresponding experimental photoexcited and photoionized spectra to study the competition between the atomic and molecular Auger decays.
Solitons in two-leg bosonic ladder subject to an artificial magnetic field
Authors: Cai L X , Zhang A X , Xue J K 
Published: June 2020

Synopsis
The nonlinear dynamics in two-leg ladder system subject to an artificial magnetic field are discussed in detail. The critical conditions for the formation of soliton and for the transition from diffusion to self-trapping are presented, and confirmed by the numerical simulations of the full discrete nonlinear Schrödinger equation.
Hybrid Electrostatic Ion Beam Trap (HEIBT): design and simulation of ion-ion and ion-neutral low-energy collisions and ion-laser photoreactions
Authors: Shahi A , Singh R , Ossia Y , Rappaport M L , Heber O , Zajfman D , Strasser D 
Published: June 2020

Synopsis
A new hybrid electrostatic ion beam trap (HEIBT) is designed and simulated for low-energy ion-ion, ion-neutral merged beam collision studies as well as ion-laser interaction experiments. The HEIBT is made possible by the design of dichroic electrostatic mirrors that reflect or transmit ion beams of different charge and energy. The experimental setup allows fragment imaging detection of the investigated reaction products ejected outside the trap.
Theoretical study of the dielectronic recombination process of Mg-like W62+ ions
Authors: Xie L Y , Nai G W , Jiang J , Zhang D H , Dong C Z 
Published: June 2020

Synopsis
The dielectronic recombination of Mg-like W62+ (3s2) ions was studied using the flexible atomic code based on the relativistic configuration interaction method with considering Breit and QED corrections. Theoretical results are compared with the experimental results from electron beam ion trap, good consistency is obtained.
Ultrafast laser induced structural dynamics probed by time-resolved photoelectron spectroscopy
Authors: Villa M de Anda , Lévy A , Gaudin J , Bouillaud R , Descamps D , Dorado B , Fedorov N , Grisenti R , Hatifi M , Jouin H , Lamour E , Macé S , Martin P , Petit S , Prigent C , Sobierajski R , Steydli S , Trassinelli M , Wawro A , Vernhet D 
Published: June 2020

Synopsis
This work aims to study laser-induced lattice dynamics when there is strong electron-lattice temperature non-equilibrium for which the material properties are poorly known. The proposed experimental technique is time-resolved photoelectron spectroscopy (Tr-PES). The main challenges of such technique are the superposition of pump and probe spectra and the distortion of the probe spectra due to the interaction with pump-induced electrons, called space charge effect (SCE). We strongly reduced this effect by tuning the 100eV XUV beamline we have developed, enabling us to investigate Copper samples.
Theoretical investigation of electron-ion recombination process of Fe14+ ion
Authors: Xie L Y , Pan J P , Zhang D H , Jiang J , Dong C Z 
Published: June 2020

Synopsis
The Δn=1 dielectronic, trielectronic, and quadruelectronic recombinations of Fe14+ ion are systematically studied using the flexible atomic code based on the relativistic configuration interaction method. The theoretical rate coefficients are identified and compared with the experimental measurements at heavy-ion storage ring (TSR), good agreement is obtained.
Autodetachment spectroscopy of the metastable HD− and

D2−

anions
Authors: Marion R , Číźek M , Urbain X 
Published: June 2020

Synopsis
The autodetachment spectrum of decaying HD− and

D
2
−

has been recorded with a velocity-map imaging spectrometer. Coincident detection of the neutral molecule permits the selection of events occuring in the center of the spectrometer. The discrete features of the spectrum are assigned to transitions between well identified ro-vibrational levels. Energies, lifetimes and branching ratios predicted with the non-local potential framework developed for associative detachment satisfactorily reproduce the experimental results.
Spectroscopy and kinetics of IR laser interaction with atmospheric molecules: Effects of cooling and chaos
Authors: Ternovsky E , Glushkov A , Svinarenko A , Bunyakova Yu 
Published: June 2020

SynopsisSpectroscopy and kinetics of energy and heat exchange in the mixture CO2-N2-H2O under passing the CO2laser pulses is studied. To describe the energy exchange and relaxation processes in the CO2.- N2- H2O mixture, which interacts with a laser pulse, we use the modified 3-mode model of the kinetic processes New data on the resonant absorption relative coefficient α(CO2) for the European mid-latitude atmospheric model are presented. It is also studied a chaotic behaviour of the carbon and nitrogen dioxide concentration time series (Munich & Gdansk reg.) and the low-D chaos effect is found.
Double-continuum R-matrix theory and codes for many-electron atoms: ionizing electron collisions and time-dependent laser-induced double-ionization
Authors: Plummer M , Noble C J 
Published: June 2020

Synopsis
An extension of ab initio many-electron R-matrix theory is described which is relevant both to the time-dependent description of excitation and single and double ionization of atoms in laser pulses, and to time-independent calculation of intermediate energy electron collisions where ionized states of the target atom can be excited. Corresponding general many-electron ‘inner region’ code modules have been developed for use in combination with existing R-matrix method codes for diverse applications with up to two electrons explicitly described by a continuum orbital basis.