bluuebunny/crossref_metadata_2025_split huggingface dataset:
Elliptic generalisation of integrable q-deformed anisotropic Haldane–Shastry long-range spin chain
Authors: Matushko M , Zotov A 
Published: December 2022

AbstractWe describe integrable elliptic q-deformed anisotropic long-range spin chain. The derivation is based on our recent construction for commuting anisotropic elliptic spin Ruijsenaars–Macdonald operators. We prove that the Polychronakos freezing trick can be applied to these operators, thus providing the commuting set of Hamiltonians for long-range spin chain constructed by means of the elliptic Baxter-BelavinGLMR-matrix. Namely, we show that the freezing trick is reduced to a set of elliptic function identities, which are then proved. These identities can be treated as conditions for equilibrium position in the underlying classical spinless Ruijsenaars–Schneider model. Trigonometric degenerations are studied as well. For example, inM = 2 case our construction provides q-deformation for anisotropic XXZ Haldane–Shastry model. The standard Haldane–Shastry model and its Uglov’s q-deformation based onUq(glˆM)XXZR-matrix are included into consideration by separate verification.
The shear Alfvén continuum with a magnetic island chain in tokamak plasmas
Authors: Qu Z S , Hole M J 
Published: December 2022

Abstract
The shear Alfvén continuum spectrum is studied for a tokamak with a single island chain using the ideal magnetohydrodynamics theory. We have taken into account the toroidal geometry and toroidal mode coupling with the island considered as a highly-shaped stellarator. Various new frequency gaps open up inside the island due to its asymmetry both poloidally and toroidally, such as the mirror-induced Alfvén eigenmode (MAE) gap and the helicity-induced Alfvén eigenmode (HAE) gap. We have shown that the MAE gap acts as the continuation of the outside toroidal Alfvén eigenmode (TAE) gap into the island. However, the combined TAE/MAE gap is getting narrower as the island grows, leaving only half of its original width with a moderate island size as much as 3.2% of the minor radius. In addition, the two-dimensional eigenfunction of the continuum mode on the lower tip of the MAE gap now has highly localised structures around the island’s long axis, contrary to the usual oscillatory global solutions found with no or a low level of toroidal asymmetry—an indication of the continuous spectrum becoming discrete and dense. These results have implications for the frequency, mode structure and continuum damping of global TAEs residing in the gap.
Electric charge build-up and dissipation at pulsed streamer corona by EFISH and probe measurements
Authors: Elliott Skye , Dogariu Arthur , Coates Celia , Leonov Sergey B 
Published: December 2022

Abstract
This work examines the dynamics of volumetric electric charge deposited by a single pin electrode streamer corona in atmospheric air at ambient conditions. Recent studies show that, at pulse-periodic operation, electric charge remains in surrounding air after the first discharge. This residual charge significantly affects the electric field distribution and morphology of discharges at subsequent pulses. In this study, the residual electrical potential/field was measured during and after dissipation of a pulsed 80 kV streamer corona of alternating polarity. This was accomplished using electrostatic probes and the electric field induced second harmonic method (EFISH generation). The residual volumetric charge of a positive pulse polarity streamer corona occupies a zone of up to 80 mm from the electrode. The subsequent application of a negative polarity pulse leads to partial neutralization of the previous charge and the generation of a region with a high-amplitude electric field. The propagation of following positive polarity pulses is limited by the residual positive volumetric charge. The EFISH method reveals the magnitude of the electric field at discharge propagation and electrostatic probes inform the polarity. Intensified imaging acquisition was used to evaluate the spatial distribution and dynamics of corona discharge during the alternating polarity waveform.
Unsteady Falkner-Skan flow of fractional Maxwell fluid towards a stretched wedge with buoyancy effects
Authors: Bai Yu , Wan Sa , Zhang Yan , Wang Xin 
Published: December 2022

Abstract
The majority of researches for Falkner-Skan flow are dependent on the classical constitutive relations of viscoelastic fluids. Fractional Maxwell fluid model is introduced to depict Falkner-Skan flow innovatively in the paper. Moreover, the momentum equation studying the effects of buoyancy force is established. Analogy to constitutive relevance for fractional Maxwell fluid, fractional derivative is brought in Fourier’s law and Fick’s law. It is worth mentioning that heat source and chemical reaction are discussed. Finite difference method integrated with L1-algorithm is utilized to address the fractional governing equations, whose convergence is verified by constructing an example with accurate solution. Furthermore, the influences of pertinent physical parameters are analyzed diagrammatically. A fascinating phenomenon is discovered that all the velocity profiles initially rise to a maximal value due to the impact of buoyancy force and then decrease to the free flow velocity. Besides, the temperature and concentration distributions first increase slightly while decline significantly, which indicates the thermal relaxation and mass relaxation characteristic of Maxwell fluid.
The Schott energy and the reactive energy in electromagnetic radiation and mutual coupling
Authors: Xiao Gaobiao 
Published: December 2022

Abstract
In the proposed theory for analyzing the electromagnetic radiation and mutual couplings in vacuum, the electromagnetic energy associated with a source is separated into three parts: a Coulomb-velocity energy, a radiative energy and a macroscopic Schott energy. When the sources disappear, the Coulomb-velocity energy disappears simultaneously; a short time later, the total macroscopic Schott energy becomes zero, while the radiative energy keeps propagating and the total radiative energy becomes constant. By applying the Liénard-Wiechert potentials to a moving charge, this paper illustrates that the macroscopic Schott energy corresponds to the Schott energy in the charged particle theory.
Energy conditions in extended f(R, G, T) gravity
Authors: Ilyas M , Ahmad Aftab , Khan Fawad , Wasif M 
Published: December 2022

Abstract
In this paper, we consider the flat FriedmannLematreRobertson-Walker metric in the presence of perfect fluid models and extended f(R, G, T) gravity (where R is the Ricci scalar, G is the Gauss Bonnet invariant and T stands for trace of energy momentum tensor). In this context, we assume some specific realistic f(R, G, T) models configuration that could be used to explore the finite-time future singularities that arise in late-time cosmic accelerating phases. In this scenario, we choose the most recent estimated values for the Hubble, deceleration, snap and jerk parameters to develop the viability and bounds on the models parameters induced by different energy conditions.
Parameter dependencies of the separatrix density in low triangularity L-mode and H-mode JET-ILW plasmas
Authors: Lomanowski B. , Rubino G. , Uccello A. , Dunne M. , Vianello N. , Aleiferis S. , Canik J. , Carvalho I. , Corrigan G. , Frassinetti L. , Frigione D. , Garzotti L. , Groth M. , Meigs A. , Maslov M. , von Thun C. Perez , Rimini F. , Schneider P.A. , Sergienko G. , Simpson J. , Van Eester D. 
Published: December 2022

Abstract
The midplane electron separatrix density, n
e,sep, in JET-ILW L-mode and H-mode low triangularity deuterium fuelled plasmas exhibits a strong explicit dependence on the averaged outer divertor target electron temperature, n
e,sep ∼ T
e,ot
−1/2. This dependence is reproduced by analytic reversed two point model (rev-2PM), and arises from parallel pressure balance, as well as the ratio of the power and momentum volumetric loss factors, (1 − f
cooling)/(1 − f
mom-loss). Quantifying the influence of the (1 − f
cooling) and (1 − f
mom-loss) loss factors on n
e,sep has been enabled by measurement estimates of these quantities from L-mode density (fueling) ramps in the outer horizontal, VH(C), and vertical target, VV, divertor configurations. Rev-2PM n
e,sep estimates from the extended H-mode and more limited L-mode datasets are recovered to within ±25% of the measurements, with a scaling factor applied to account for use of

T

e,ot

, an averaged quantity, rather than flux tube resolved target values. Both the (1 − f
cooling) and (1 − f
mom-loss) trends and recovery of n
e,sep using the rev-2PM formatting are reproduced in EDGE2D-EIRENE L-mode-like and H-mode-like density scan simulations. The general lack of a divertor configuration effect in the JET-ILW n
e,sep trends can be attributed to a significant influence of main chamber recycling, which has been shown in the EDGE2D-EIRENE results to moderate n
e,sep with respect to changes in divertor neutral leakage imposed by changes in the divertor configuration. The unified n
e,sep vs

T

e,ot

trends can, however, be broken if large modifications to the divertor geometry (e.g. complete removal of the outer divertor baffle structure) are introduced in the model. The more pronounced high-field side high density region formation in the VH(C) configuration with reduced clearance to the separatrix does not appear to have a significant influence on the outer midplane separatrix and pedestal parameters when mapped to

T

e,ot

, although conditions at the inner midplane could not be assessed.
Characteristics of Impact on the Atmosphere of Perfluorisohexenes - Promising Components of Gas Extinguishing Compositions
Authors: Kopylov S N , Kopylov P S , Eltyshev I P , Begishev I R 
Published: December 2022

Abstract
Ecological properties of perfluorohexenes are studied in the paper. C6F12 atmospheric lifetime of 17.4 days was obtained using one-dimensional photochemical model. It was shown that the substance disappears in the atmosphere due to its reactions mostly with OH radicals. Absorption spectra of C6F12 in the short-wavelength ultraviolet region of 110-200 nm and in the infrared region were calculated using the Gaussian 09 quantum mechanical calculation program. Calculations revealed that C6F12 has significant absorption in the infrared region but due to short atmospheric lifetime of this substance its global warming potential GWP is as low as 28.64. Ozone depleting potential (ODP) of perfluoroisohexenes is equal to zero due to short chain length for the chain processes of ozone destruction involving fluorine atoms. Thus, perfluoroisohexenes with their zero ODP, short atmospheric lifetime and low GWP meet all modern environmental requirements and can be considered as effective substitutes for high-GWP HFCs in fire suppression.
Experimental methods for studying heat transfer in cable penetrations in case of fire
Authors: Khasanov I R , Varlamkin A A 
Published: December 2022

Abstract
An experimental technique for studying the processes of heat transfer in cable penetrations under the thermal effects of fire is proposed. To study the influence of the design of cable penetrations on cable heating processes, three most common types of penetrations were selected. New experimental data on the dependence of the temperature of the structural elements of the cable and the penetration on time have been obtained. It is shown that the conductive core of the cable is the main element involved in the propagation of heat. The presence of an air space or a material that promotes intensive heat exchange in the cable penetration design leads to an increase in its fire resistance limit. It is determined that the cable penetration with the filling of the internal space with fire-fighting foam based on polyurethane foam is most susceptible to rapid heating and loss of fire resistance. Studies have shown that when assessing the fire resistance limits of cable penetrations, it is necessary to take into account the thermophysical characteristics of cables, their number, as well as the design features of cable penetrations.
Modeling of thermal impact on the building facade structures in case of flame ejection through a window
Authors: Lobova S F , Petrova N V , Gaidukevich A E 
Published: December 2022

Abstract
The results of experimental studies to determine the thermal impact on the facade of a building when a flame is ejected through a window opening are analyzed. The dependence of the change in the shape and power of the external torch on the geometric parameters of the opening and the room of the hearth, the type of fire load and the climatic features of the area has been established. An example of the application of field modeling of the thermal effect of an external torch on the structure of the facade of a building in the event of a glazing failure in a fire seat is given. The main problems of setting a physical problem in the computational environment and ways of solving them during field modeling in the framework of assessing the influence of the type of construction of the interfloor belt on the level of thermal exposure in case of fire are formulated.
Parameters of surface standing waves in fluidized bed apparat with different diameter
Authors: Ershov M I , Tuponogov V G , Abaimov N A , Ryzhkov A F 
Published: December 2022

Abstract
Regarding medium- and low-temperature processes of heterogeneous heterophase interaction in the units for cleaning from pollutants and trapping CO2, the analogy of the behavior of standing surface waves of an ideal liquid with oscillations of the surface of a fluidized bed is considered. Waves on the surface of a fluidized bed are formed when gas bubbles leave it and are one of the elements of the mechanism of self-sustained fluctuations of the entire mass of the bed. The frequency modes of the surface waves correspond to the main modes in the spectra of pressure fluctuations in the bed and depend on its geometry. The fluctuations of a bubble three-dimensional fluidized bed in apparatuses of different sizes are numerically simulated in a high-performance parallel computing mode using the Ansys Fluent program. Comparison of analytical calculations for fluid oscillations in a vessel with the results of numerical simulation of a fluidized bed and experimental data on the frequency of the emergence of bubbles and modes of surface waves is carried out.
Spark transfer in forest fires and their localization using aviation
Authors: Kopylov N P , Khasanov I R , Kuznetsov A E , Yu Sushkina E 
Published: December 2022

Abstract
The results of modelling of spark transfer as one of the most powerful factors influencing forest fire propagation are discussed in the paper. It is shown that this process depends on many factors such as the type and intensity of the fire, characteristics of forest vegetation, wind speed, size, mass and shape of burning particles, duration of their burning and terrain. The accuracy of the description of this process by mathematical methods depends on the degree of consideration of various factors affecting the transfer of burning particles. The developed mathematical models and the techniques created on their basis make it possible to assess the range of transport of burning particles and predict the risks of the occurrence and spread of fire including affecting settlements and objects. In particular, the obtained numerical values of the casting range of burning elements in forest fires allow correct determination of the size of the barrier strips near settlements and objects located in forests.
The organization and field experimentation studies of wildfires. Experience and practice
Authors: Loboda E L , Kasymov D P , Agafontsev M V , Reyno V V 
Published: December 2022

Abstract
The paper gives an overview of experiments on the study of natural fires, carried out by the staff of the Department of Physical and Computational Mechanics of the Faculty of Mechanics and Mathematics of TSU. A number of recommendations for safe conduct of experiments are given, the requirements for measuring equipment and its use in conducting firefighting activities are indicated. It is noted that for the early detection of fires, it is best to use measuring equipment that allows you to estimate the number and size of aerosol particles in the air. To register meteorological parameters should be used ultrasonic weather stations, allowing to register the various components of flow velocity and some characteristics of turbulence.
European heatwave tracks: using causal discovery to detect recurring pathways in a single-regional climate model large ensemble
Authors: Böhnisch A , Felsche E , Ludwig R 
Published: December 2022

Abstract
Summer heatwaves repeatedly affect extended regions in Europe, resulting in adverse economic, social, and ecological impacts. Recent events, e.g. the 2022 heatwave, also attract interest regarding the spatial shifts of their impact centers. Evaluations so far either investigated heatwave passages at pre-defined locations or employed algorithms to spatio-temporally track their core regions. Usually, the latter focus on single events, and thus often fail to generalize spatial heatwave tracks or ignore track characteristics. Here, we use a data-driven approach employing causal discovery to robustly characterize European heatwave tracks in single-model initial condition large ensemble (SMILE) climate simulations to overcome sampling uncertainties of observational records. This enables us to identify specific recurrent heatwave tracks, evaluate their preferential seasonal occurrence, and associate them with moving high pressure centers. Additionally, the evaluation of heatwave track representation in the SMILE extends standard model evaluation, which is mostly based on static statistics. We provide the first comprehensive analysis on heatwave tracks considering internal climate variability conducted within a SMILE, promoting the latter as a methodological testbed in climate extremes research.
Amplification and storage of light carrying orbital angular momentum via magnetically assisted gain in cold atoms
Authors: Moreira R S N , de Aquino Carvalho J C , Tabosa J W R 
Published: December 2022

Abstract
We report on the amplification and the storage of a light vortex beam carrying orbital angular momentum (OAM) in an ensemble of cold cesium atoms in the presence of an external transverse magnetic field. This magnetically assisted optical gain was previously reported in a recent publication and originates from the manipulation of the induced dark state by the external magnetic field. Single pass optical gain exceeding

100

% was measured for beams with different topological charges. Furthermore, we also demonstrate the storage and retrieval of the vortex beams, showing that the amplification and the storage processes preserve the coherent nature of the optical vortex. A simple theoretical model based on density matrix numeric calculation and which accounts for the presence of the external magnetic field was developed and present qualitative agreement with the observed results. Owing to the recent proposal of using light carrying OAM for efficient data transmission systems, we believe our results could find application in communications protocols involving distant nodes.
Relationship Between White-Coat Effect and Blood Pressure Variability in Essential Hypertension
Authors: Xu Jin-hong , Lin Jin-xiu , Zheng Xiao-rong 
Published: December 2022

Abstract

Background
To investigate the incidence of white-coat effect (WCE) and to analyze the relationship between WCE and blood pressure (BP) variability in essential hypertension (EH).

Methods
A total of 410 patients with grade 1 and 2 EH voluntarily participated in this study. BP was self-measured at home for 1 week. Based on home and office BP, the untreated subjects were divided into white-coat hypertension (WCH, n = 38) and sustained hypertension (SHT, n = 66). The treated subjects were grouped into sustained controlled hypertension (SCH, n = 131), white-coat uncontrolled hypertension (WCUH, n = 95), masked uncontrolled hypertension (MUCH, n = 16), and sustained uncontrolled hypertension (SUCH, n = 64). A subgroup analysis was performed in the treatment hypertensives whose diagnosis based on BP inside and outside the clinic.

Results
WCH and WCUH patients accounted for 36.5% (95% confidence interval [CI] 27.2%–45.8%) and 31.0% (95% CI 25.8%–36.2%), respectively, in this population while only accounted for 21.7% (95% CI 14.5%–28.9%) in hypertensives whose diagnosis based on office BP and out-of-office BP, which was significantly lower than that based on office BP alone (34.5%). The WCE, that was, the difference between office and home BP, in the WCH patients was significantly higher than SHT patients (P &lt; 0.05), and stronger in the WUCH group compared with SCH and SUCH groups (P &lt; 0.05). Home systolic BP variability exhibited decreasing trends in the WCH and WUCH patients compared with SHT and SUCH patients.

Conclusions
The incidences of WCH and WUCH are high in grade 1 and 2 hypertensive patients. However, the incidence of WUCH decreases in treated patients diagnosed with office and out-of-office BP. Relative to other patients, WCH and WUCH patients exhibit stronger WCE and a decreasing trend of BP variability.
A Rapid Review of Reflective Supervision in Social Work
Authors: Ravalier Jermaine M , Wegrzynek Paulina , Mitchell Annabel , McGowan John , Mcfadden Paula , Bald Caroline 
Published: December 2022

Abstract
Reflective supervision (RS) is a crucial component of social work practice but little is known about how RS works within the UK context and what the outcomes of RS are for social workers and their service users. A rapid literature review comprised searching four databases for academic and grey literature on the topic of social work RS. The Mixed Methods Appraisal Tool and the University College London’s literature assessment method were employed in an expedited quality appraisal for all included papers. Twenty-seven papers were included. Findings suggest that a supportive, available manager or a peer-group enables reflective practice. Regularity of supervisory sessions and acknowledgement of a social worker’s autonomy are seen as enablers of reflexivity. In contrast, task-oriented approach that is overly focused on accountability and hindered by the sparsity of resources proves problematic for both social workers and service users. Whilst theoretical papers were available, RS was not defined in a uniform fashion and there was limited evidence pertaining to supervisory practice. More research focusing on what works and what improvements are needed in RS, including adopting a participatory approach would help to bridge this gap and further inform policy and practice.