bluuebunny/crossref_metadata_2025_split huggingface dataset:
RAQ: a novel surrogate for the craniospinal pressure–volume relationship
Authors: Spiegelberg Andreas , Krause Matthias , Meixensberger Juergen , Kurtcuoglu Vartan 
Published: August 2020

Abstract

Objective: The intracranial pressure–volume relation contains information relevant for diagnostics of hydrocephalus and other space-occupying pathologies. We aimed to design a noise-resilient surrogate for this relationship that can be calculated from intracranial pressure (ICP) signals. Approach: The new surrogate, termed respiratory amplitude quotient (RAQ), characterizes the modulation of the cardiac pulse wave amplitude by the respiratory wave in the ICP time course. RAQ is defined as the ratio of the amplitude of the respiratory wave in the ICP signal to the amplitude of the respiration-induced variation in the course of the cardiac pulse wave amplitude. We validated the calculation of RAQ on synthetically generated ICP waveforms. We further extracted RAQ retrospectively from overnight ICP recordings in a cohort of hydrocephalus patients with aqueductal stenosis, age 55.8 ± 18.0 years, and a comparison group with hydrocephalus diagnosed by morphology in MRI, but not responsive to either external lumbar drainage or ventriculo-peritoneal shunting, age 72.5 ± 6.1 years. RAQ was determined for the full recordings, and separately for periods containing B-waves. Main results: We found a mean difference of less than 2% between the calculated values of RAQ and the theoretically determined equivalent descriptors of the synthetic ICP waveforms. In the overnight recordings, we found significantly different RAQ values during B-waves in the aqueductal stenosis (0.86 ± 0.11) and non-responsive hydrocephalus patient groups (1.07 ± 0.20), p = 0.027. In contrast, there was no significant difference in other tested parameters, namely pressure–volume index, elastance coefficient, and resistance to outflow. Neither did we find significant difference when considering RAQ over the full recordings. Significance: Our results indicate that RAQ may function as a potential surrogate for the intracranial pressure–volume relation.
Experimental validation of solar-panel-tied three-port switched-inductor-based dual-boost DC–DC-converter-fed three-phase micro-inverter
Authors: Kamalathiyagarajan S , Chitra Selvi S 
Published: August 2020

Abstract
This paper proposes a solar-panel-integrated modified high-gain three-port dual-boost switched-inductor-based DC–DC-converter-operated micro-inverter for grid-connected applications. Solar-panel-integrated grid-connected micro-inverters need a high-gain front-end DC–DC converter to regulate and step up the output voltage of the solar panels. The proposed three-port dual-boost DC–DC converter offers high voltage gain at low duty ratio and efficiently transfers the power produced by the solar panel to the utility grid. The power losses and steady-state analysis of the proposed converter working in continuous conduction mode are examined. Examinations among the conventional boost converter are presented, and it is discovered that the proposed converter has the largest voltage transformation. Finally, the results obtained from simulated and experimental prototype models are presented to confirm the power conversion capability of the proposed converter.
Theoretical analysis of carrier heating effect in quantum-dot semiconductor lasers based on a multi-level energy balance equations model
Authors: Yousefvand Hossein Reza 
Published: August 2020

Abstract
In this paper, we develop a self-consistent numerical approach for quantum-dot (QD) semiconductor lasers which enables us to dynamically describe the charge-carrier temperature in the wetting layer (WL) and within the QDs during the laser operation. The self-consistent analysis of the WL-QD system is performed using an asymmetric multi-population rate-equation model with a multi-level energy balance equations approach. An important aspect of the model is that the carrier scattering dynamics in the combined WL-QD system is described by Coulomb scattering rates, and these rates are incorporated into the laser dynamical equations as nonlinear functions of the electron and hole densities in the WL. Using the presented model, the impact of carrier heating on the steady-state, turn-on dynamics and small-signal modulation response of QD lasers is investigated. As a main result it is shown that the carrier temperature in the WL is sufficiently higher than the carrier temperature inside the QDs, because the WL is the main origin of all carrier–carrier collisions in the system and, it not only acts as a carrier reservoir for QDs but can also inhibit the carrier heating inside the QDs.
Finite-key analysis for memory-assisted decoy-state quantum key distribution
Authors: Lorenzo Guillermo Currás , Razavi Mohsen 
Published: August 2020

Abstract
Memory-assisted quantum key distribution (MA-QKD) systems are among novel promising solutions that can improve the key-rate scaling with channel loss. By using a middle node with quantum storage and measurement functionalities, they offer the same key-rate scaling with distance as a single-node quantum repeater. However, the distance at which they can surpass the nominal key rate of repeaterless systems, in terms of bits per second, is typically long, owing to the efficiency and/or interaction time issues when one deals with quantum memories. This crossover distance can be a few hundred kilometres, for instance, when one relies on the exchange of infinitely many key bits for the key-rate analysis. In a realistic setup, however, we should account for the finite-key effects in our analysis. Here, we show that accounting for such effects would actually favour MA-QKD setups, by reducing the crossover distance to the regime where realistic implementations can take place. We demonstrate this by rigorously analysing a decoy-state version of MA-QKD, in the finite-key regime, using memory parameters already achievable experimentally. This provides us with a better understanding of the advantages and challenges of working with memory-based systems.
Role of crystalline and damping anisotropy to the angular dependences of spin rectification effect in single crystal CoFe film
Authors: Zeng Fanlong , Shen Xi , Li Yi , Yuan Zhe , Zhang Wei , Wu Yizheng 
Published: August 2020

Abstract
The angular dependence of the microwave-driven spin rectification (SR) effect in single crystalline Co0.5Fe0.5 alloy film is systematically investigated. Due to the strong current-orientation dependent anisotropic magnetoresistance (AMR), the SR effects in CoFe film strongly deviate from the ordinary sin 2φ
M cos φ
M relation with φ
M defined as the magnetization angle away from the current. A giant Gilbert damping anisotropy in the CoFe film with a maximum–minimum ratio of 520% is observed, which can impose a strong anisotropy onto magnetic susceptibility. The observed unusual angular dependence can be well explained by the theory including current-orientation dependent AMR and anisotropic magnetic susceptibility. Our work also suggests that the strong current-orientation dependent AMR in single crystalline CoFe film could exist up to the gigahertz frequency range.
Photometric investigation of eight ultra-short period eclipsing binaries from OGLE
Authors: Shanti Priya D. , Ravi Raja P. , Rukmini J. , Raghu Prasad M. , Thomas Vineet S. 
Published: August 2020

Abstract
We performed a detailed photometric analysis of eight ultra-short period eclipsing binaries (USPEBs) using the Wilson-Devinney method. We present the modeled light curves and derived photometric solutions. The USPEBs with period (P)≤0.21 d considered in our study belong to W-subtype having shallow contact factor (f) <∼20%, high mass ratio (q) >∼0.7 and later spectral types. The absolute parameters for these short-period binaries were derived applying empirical relations. We discuss the evolutionary stage of these USPEBs using the mass-radius, color-density and period-color diagrams. The objects showed poor metallicities, and some objects were even found to be existing around fully convective limits. The period distribution of USPEBs exhibited a sharp cut-off at 0.22 d; however, we observed significant deficits for our objects in the literature. We examined the statistics of USPEBs studied to date (in terms of the distribution of period, mass ratio and component temperatures of USPEBs) and observed that a dominant distribution of component temperatures for these USPEBs was towards lower temperatures.
Conditions for galaxy quenching at 0.5 < z < 2.5 from CANDELS: compact cores and environment
Authors: Ge Xue , Liu Feng-Shan , Gu Qiu-Sheng , Contini Emanuele , Gu Yi-Zhou 
Published: August 2020

Abstract
We investigate two classes of conditions for galaxy quenching at 0.5 < z < 2.5 based on the structural scaling relations of galaxies in the five Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) fields: the formation of a compact core and the environment. We confirm that in the entire redshift range, massive quiescent galaxies (M
* > 1010
M
⊙) have much higher stellar mass surface densities within the central 1 kpc (Σ1) and smaller sizes than star-forming galaxies in the same stellar mass range. In addition, the quiescent fractions significantly increase with the increase of Σ1 regardless of whether galaxies are centrals or satellites. In contrast, we find that the overall lower-mass quiescent galaxies (M
* <∼ 1010
M
⊙) have slightly higher Σ1 and comparable sizes compared to star-forming galaxies of the same mass and at the same redshift. At z < 1.5, satellites have higher halo masses and larger quiescent fractions than those of centrals at a given Σ1 (stellar mass). Our findings indicate that the significant growth of the galaxy cores is closely related to the quenching of massive galaxies since z ∼ 2.5, while the environmental effect plays an important role in the quenching of low-mass galaxies at z ≲ 1.5.
Propagating slow sausage waves in a sunspot observed by the New Vacuum Solar Telescope
Authors: Feng Song , Deng Zheng , Yuan Ding , Xu Zhi , Yang Xiao 
Published: August 2020

Abstract
A sunspot is an ideal waveguide for a variety of magnetohydrodynamic waves, which carry a significant amount of energy to the upper atmosphere and could be used as a tool to probe the magnetic and thermal structure of a sunspot. In this study, we used the New Vacuum Solar Telescope and took high-resolution image sequences simultaneously in both TiO (7058±10 Å) and H
α
(6562±2.5 Å) bandpasses. We extracted the area and total emission intensity variations of sunspot umbra and analyzed the signals with synchrosqueezing transform. We found that the area and emission intensity varied with both three and five minute periodicity. Moreover, the area and intensity oscillated in phase with each other, this fact hold in both TiO and H
α
data. We interpret this oscillatory signal as a propagating slow sausage wave. The propagation speed is estimated at about 8 km s−1. We infer that this sunspot’s umbra could have temperature as low as 2800–3500 K.
The dying accretion and jet in a powerful radio galaxy of Hercules A
Authors: Wu Lin-Hui , Wu Qing-Wen , Feng Jian-Chao , Lu Ru-Sen , Fan Xu-Liang 
Published: August 2020

Abstract
Hercules A (Her A) is one of a rare class of dying and transition-type objects, which has a pair of giant, powerful radio lobes and a weak radio core. We reduce and analyze the radio data of Her A that were observed by the Expanded Very Large Array (EVLA) during 2010-2011 at C band. The intensity distribution is very smooth along the edge of the lobe front and the intensity also sharply decreases at the edge, which supports that magnetic fields may play an important role in radio lobes. The spectrum of the weak core is very steep and the core flux becomes weaker by about ten percent when compared to what was observed twenty years ago, which suggest that the central engine is still dying quickly. Her A deviates a lot from the relation between [O III] luminosity and low-frequency 178 MHz luminosity (L
O III – L
178MHz) as defined by other FR I/II sources. However, when only radio core emission is considered, it roughly follows an L
O III – L
178 MHz correlation. This result supports that the black-hole accretion and large-scale jet in Her A did not evolve simultaneously, and indicates that although the large-scale jet is still powerful, the accretion and inner jet have changed into an inactive state. Based on the estimated Bondi accretion rate, we model the spectrum of Her A with a radiatively inefficient accretion flow and jet model.
A pilot study of catching high-z GRBs and exploring circumburst environment in the forthcoming SVOM era
Authors: Wang Jing , Qiu Yu-Lei , Wei Jian-Yan 
Published: August 2020

Abstract
Rapid spectroscopy of GRB afterglows is an important and hard task. Based on the archival XS-GRB spectral database, we here perform a pilot study on the afterglow’s spectroscopy in the forthcoming SVOM era in two aspects. First, our simulation indicates that the color acquired from the SVOM/VT blue and red channels is effective in discriminating between low-z (z ≲ 3) and distant GRB candidates until z ∼ 6. Second, by doubling the sample size, we find that the previously proposed global photoionization response of the circumburst gas to the prompt emission (i.e., the CIV/CII-

L

iso

/

E

peak

2

relationship) is roughly confirmed, although the confirmation is dissatisfactory at the large

L

iso

/

E

peak

2

end. We believe that this issue can be further addressed in the SVOM era by a larger spectroscopy sample, thanks to its capability of rapid identification of optical candidates of afterglow and its anti-solar pointing strategy.
Milky Way globular cluster dynamics: are they preferentially co-rotating?
Authors: Das Saikat , Roy Nirupam 
Published: August 2020

Abstract
The motion of baryonic components of the Milky Way is governed by both luminous and dark matter content of the Galaxy. Thus, the dynamics of Milky Way globular clusters (GCs) can be used as tracers to infer the mass model of the Galaxy up to a large radius. In this work, we apply the directly observable line-of-sight velocities to test if the dynamics of the GC population are consistent with an assumed axisymmetric gravitational potential of the Milky Way. For this, we numerically compute the phase space distribution of the GC population where the orbits are either oriented randomly or co-/counter- rotating with respect to the stellar disk. Then we compare the observed position and line-of-sight velocity distribution of ∼150 GCs with those of the models. We found that, for the adopted mass model, the co-rotating scenario is the favored model based on various statistical tests. We do the analysis with and without the GCs associated with the progenitors of early merger events. This analysis can be extended in the near future to include precise and copious data to better constrain the Galactic potential up to a large radius.
Mid-infrared atmospheric transmittance at 5100m-altitude Ali Observatory
Authors: Wang Fei-Xiang , Xu Fang-Yu , Guo Jie , Zhao Zhi-Jun , Hao Rui-Ting , Xiao Jian-Guo , Jia Yu-Chao , Huang Shan-Jie 
Published: August 2020

Abstract
Ali in Tibet, 5100 m above sea level, is one of the most suitable locations in the world for infrared spectral observations. The atmospheric transmittances at Ali Observatory and Mauna Kea Observatory were calculated by MODTRAN using radiosonde data. The results were 0.848 and 0.789 respectively which indicated better conditions at Ali Observatory. A self-made instrument with a 320×256-pixel HgCdTe infrared focal plane array and a 7.5-cm diameter telescope was utilized for the actual measurements. Without the help of standard stars, the on-site and real-time atmospheric transmittance can be obtained as 0.831 by fitting the relation between the measured atmospheric radiation intensity and the zenith angle based on radiation transfer equations. This paper firstly reports the atmospheric transmittance in the M’ band (4.605–4.755 μm) at the 5100 m-altitude Ali observatory by actual measurement. It shows that the high-altitude Ali observatory with sufficiently low water vapor content is suitable for observation in the mid-infrared bands.
Feasibility study of greater occipital nerve blocks by focused ultrasound – an animal study
Authors: Chiou Jiun-Yi , Abd-Elrehim Tamer , Lin Chou-Ching , Chen Gin-Shin 
Published: August 2020

Abstract

Objective. Greater occipital nerve (GON) block may provide substantial relief for headache in the occipital location. This study tested the feasibility of focused ultrasound (FUS) to induce the conduction block of GONs in rats. Approach. For in vitro experiments, the nerve was dissected and cut from C2 to the site near the ear of the rats and preserved in Ringer’s solution. Pulsed FUS was used for the block, and sensory action potentials were recorded in the GON. For in vivo experiments, the GONs of the rats were surgically exposed for precise ultrasonic treatment. All data are expressed as the mean ± the standard deviation. Main results. A single ultrasonic treatment temporarily suppressed the amplitude of action potentials of the in vitro nerves to 42 ± 14% of the baseline values, and the time to recovery was 55 min. The in vivo results showed that FUS acutely inhibited the amplitude of action potentials to 41 ± 8% of the baseline value in rat GONs, and the time to recovery was 67 min. Histological examination revealed no appreciable changes in the nerve morphology caused by FUS. Therefore, FUS reversibly blocked the conduction of the rat GON when the sonication parameters were appropriate. Significance. Noninvasive FUS may be a novel treatment paradigm for occipital headache by blocking the occipital nerve, and the procedure is repeatable if indicated.
MHD bioconvective flow of a thermally radiative nanoliquid in a stratified medium considering gyrotactic microorganisms
Authors: Eswaramoorthi S , Jagan K , Sivasankaran S 
Published: August 2020

Abstract
The impact of gyrotactic microorganisms of a stratified flow of a thermally radiative NL with heat absorption is highlighted. In addition, magneto NL with an inclined magnetic field is included. Suitable transformations are adopted to convert the governing PDEs into an nonlinear ODEs. Homotopy analysis method (HAM) is employed to solve these ODEs analytically. The impact of sundry parameters on VP, TP, NPVFP, MMDP, SFC, LNN and LDMM are graphically explained. We compare our results to available results in literature survey.
Bifurcation analysis in a discrete time square root response function of predator-prey system with fractional order
Authors: George Maria Selvam A , Janagaraj R 
Published: August 2020

Abstract
Stability and bifurcation analysis for a two spices discrete fractional order system by introducing square root response function of the form

x
(
j
+
1
)
=
x
(
j
)
+

h
α

Γ
(
1
+
α
)

[

μ
x
(
j
)
−
μ

x
2

(
j
)
−
σ

x
(
j
)
y
(
j
)

]

y
(
j
+
1
)
=
y
(
j
)
+

h
α

Γ
(
1
+
α
)

[

η

x
(
j
)
y
(
j
)

−
β
y
(
j
)

]

is examined in the closed first quadrant

ℝ
+
2

. The model parameters h, α, β, μ, σ, η are biologically feasible positive real numbers. Piecewise constant arguments method is applied to obtain the discrete fractional order system, particularly to study the rich dynamical behavior of the proposed system. Because the system has square root response function, the variation matrix of trivial and axial equilibrium states are in-determinant. In order to study the stability of the trivial and semi trivial equilibrium states, the change of variables x(j) = X
2(j) and y(j) = Y
2 (j) is considered. Moreover, we determine the criteria for stability of the interior equilibrium state using jury conditions. The numerical performance is shown for various parameter values and the time series and phase line diagrams are obtained. Bifurcation theory is applied to check whether the system undergoes periodic doubling bifurcations at its semi trivial and interior equilibrium states. Also we explore the periodic halving bifurcation which occurs for the fractional order as a bifurcation parameter. Numerical examples are presented to show the validity and feasibility of the obtained stability criterion in both species, including periodic doubling, periodic - 2, 4, 8, 16, periodic windows and Non periodic orbit (i.e., chaos).
Two dimensional second order Fibonacci summation formula with extorial functions
Authors: Sathinathan T , Britto Antony Xavier G , Vignesh K 
Published: August 2020

Abstract
This paper aims to obtain the extorial type solutions for Fibonacci difference equations on real valued function defined in two dimensional space having shift value ℓ. Using two dimensional second order Fibonacci nabla difference operator and its inverse, we derived Second order fibonacci summation formula of product of real valued polynomial. A function obtained by replacing polynomial into polynomial factorials in the expansion of exponential function is called extorial function. Using extorial functions defined in ℝ2, we obtain solution of certain type of two dimensional second order difference equations. Suitable examples and numerical verifications are given to validate the findings.
Ohmic dissipation effect of Walter’s-B fluids over a porous stretching sheet in the presence of inclined magnetic field
Authors: Munirathinam S , Ragavan C , Kalaivanan R , Ganga B 
Published: August 2020

AbstractPresent article intends to analyze the Ohmic dissipation effect on Walter’s-B fluid flow through porous medium over a stretching sheet with elastic deformation. Inclined magnetic field effects also considered. With the help of similarity transformations, the nonlinear ODEs are obtained from system of PDEs, and then solved analytically by using the confluent hypergeometric function. Results delineating the flow characteristics are presented through graphs and tables for the effect of various parameters. It is observed that thermal boundary layer enaches with increasing values of magnetic and angle parameters and opposite effect observed from elastic deformation parameter.
Prime cordial labeling of n-chain vertex merged staircase graphs
Authors: Antony Arockiasamy M , Manivasagam A 
Published: August 2020

Abstract
A prime cordial labeling of a graph G with vertex set V is a bijection h:V → {1,2,..|V|} such that, for each edgeuv, the label 1 is assigned, if g.c.d[h(u), h(y)] = 1, otherwise 0, and the total number of edges labeled as 0, and the total number of edges labeled as 1, differ atmost by 1. In this paper, we prove that n-chain vertex merged staircase graphs are prime cordial.
Exact and Asymptotic solution of a steady two dimensional boundary layer of a Micropolar fluid flow past a moving wedge
Authors: Kudenatti Ramesh B. , Vanitha V. R. 
Published: August 2020

Abstract
In this paper, we propose an analytic solution of a boundary value problem which models a steady, laminar, two dimensional, boundary layer flow of an incompressible and viscous micropolar fluid over a moving wedge. The governing non-linear partial differential equations are converted into highly non-linear ordinary differential equations using similarity transformations. An analytical exact solution obtained for particular values of parameters are then extended to obtain an exact solution for more general values of the parameters involved. We also propose asymptotic solution of the Micropolar boundary layer flow. The results thus obtained are compared with those of direct numerical solutions, which show a good agreement. The results are discussed in terms of velocity profiles and wall shear stresses for various physical parameters.
NS(WπG) closed sets in Neutrosophic topological spaces
Authors: Suresh R , Palaniammal S 
Published: August 2020

Abstract
Smarandache presented and built up the new idea of Neutrosophic concepts from Neutrosophic sets. Salama presented Neutrosophic topologicalspaces by utilizing the Neutrosophic sets. Point of this paper is we present and concentrate in NS(WπG)CS, NS(WπG)OS in NSTS. and its Properties are talked about subtleties