bluuebunny/crossref_metadata_2025_split huggingface dataset:
Severe Preeclampsia is Associated with Functional and Structural Cardiac Alterations: A Case-control Study
Authors: Kilic Derya , Guler Tolga , Sevgican Cihan Ilyas , Atigan Ayhan , Kilic Oguz , Kaya Derya , Kilic Ismail Dogu 
Published: April 2021

AbstractBackground The aim of the current study is to compare electrocardiographic and echocardiographic changes in patients with severe preeclampsia (PE) and those with uncomplicated pregnancies.Methods This is a case-controlled prospective study consisting of 21 pregnant women with severe preeclampsia and a control group consisting of age- and gestational age-matched 24 healthy pregnant women. All patients underwent electrocardiographic and echocardiographic investigation.Results QRS intervals were shorter and PR intervals were longer in the PE group (QRS duration: 80 (60–120) ms and 80 (40–110) ms, p=0.035; PR duration: 160 (100–240) ms and 120 (80–200) ms, respectively; p=0.046). The left ventricular end-systolic diameters of the patients with severe PE group were significantly larger than the control group (31 (24–36) mm and 30 (24–33) mm, respectively; p=0.05). Similarly, posterior wall thickness values of the PE group were significantly higher compared to the control group (9 (7–11) mm vs. 8 (6–10) mm, respectively; p=0.020). Left ventricular mass (146.63±27.73 g and 128.69±23.25 g, respectively; p=0.033) and relative wall thickness values (0.385±0.054 and 0.349±0.046, respectively; p=0.030) were also higher in the PE group. In addition, patients with early-onset severe PE had significantly a higher left ventricular end-diastolic diameter and volume compared with late-onset PE patients.Conclusions The structural changes detected in the severe PE group suggest a chronic process rather than an acute effect. In addition, diastolic dysfunction and left ventricular remodeling are most marked in patients with severe early-onset PE.
Eine prolongierte Reanimation nach häuslichem Kollaps
Authors: Floerchinger Bernhard , Philipp Alois , Kieninger Martin 
Published: April 2021

ZusammenfassungDiese Kasuistik schildert eine prolongierte Reanimation eines 34-jährigen Mannes nach Herz-Kreislauf-Stillstand im häuslichen Umfeld (out-of-hospital cardiac arrest, OHCA). Nach Kontaktaufnahme zu einem überregionalen Krankenhaus der Maximalversorgung in 100 km Entfernung und Anforderung eines ECMO-Teams per RTH konnte bei dem Patienten nach 88-minütiger Reanimation eine venoarterielle Kreislaufunterstützung etabliert werden. Nach Verlegung des Patienten mit RTH konnte ein akuter Verschluss der rechten Koronararterie interventionell wieder eröffnet werden.
Spontaneous Left Main Coronary Artery Dissection: Case Report
Authors: Mani Krishna S. V. V. , Chakravarthy D. P. Kalyan , Kakroo Shahood Ajaz , Kumar M. Naveen 
Published: April 2021

Abstract
Left main coronary artery (LMCA) dissections may be iatrogenic or spontaneous. Spontaneous coronary artery dissections (SCADs) are common in pregnant women, with predominantly left anterior descending artery (LAD) involvement. In males, coronary artery dissections may happen in alcoholics. Spontaneous LMCA dissection as the cause of myocardial infarction is very rare. We are reporting a case of spontaneous LMCA dissection in a 45-year-old male alcoholic with the involvement of LAD ostium, which resolved spontaneously with conservative management.
ECG—An Axis Dilemma with Tachycardia
Authors: Kale Seema , sekhar Soma , Munjal Amit , Datta S. K. , K. Sharada Sivaram , Chennapragada Sridevi 
Published: April 2021

Abstract
Cardiac arrhythmias are common in acute myocardial infarction (MI), especially in ST elevation MI. Almost 90% of patients develop some form of cardiac arrhythmia in acute MI. Mostly they are benign and transient. Incidence of atrial tachycardia is fairly uncommon in such setting. Most of the arrhythmias disappear after reperfusion. Interpretation of electrocardiograms (ECGs) in emergency becomes even more difficult if there is unusual QRS axis and possibility of arm lead reversal.
Mapping discrimination in Europe through a field experiment in amateur sport
Authors: Gomez-Gonzalez Carlos , Nesseler Cornel , Dietl Helmut M. 
Published: April 2021

AbstractSocieties are increasingly multicultural and diverse, consisting of members who migrated from various other countries. However, immigrants and ethnic minorities often face discrimination in the form of fewer opportunities for labor and housing, as well as limitations on interactions in other social domains. Using mock email accounts with typical native-sounding and foreign-sounding names, we contacted 23,020 amateur football clubs in 22 European countries, asking to participate in a training session. Response rates differed across countries and were, on average, about 10% lower for foreign-sounding names. The present field experiment reveals discrimination against ethnic minority groups, uncovering organizational deficiencies in a system trusted to foster social interactions.
Psidium guajava (guava).
Authors: Rojas-Sandoval Julissa , Acevedo-Rodríguez Pedro 
Published: April 2021

Abstract

P. guajava is indigenous to the American tropics, and is now naturalized throughout the tropics and subtropics. It is grown mainly for its fruit, which is usually eaten raw, both green and when ripe, or is also cooked for preserves, jams, juice and guava paste (or 'guava cheese'). P. guajava is an ideal home garden fruit tree due to its hardiness, high yield, long supply season and high nutritive value. It is grown in orchards or incorporated into agroforestry systems in India, and is widely planted (or has spread) in Africa. The potential for developing guava for a larger and wider commercial market appears to be limited, mainly by its short shelf life and its susceptibility to fruit flies. One disadvantage is that P. guajava is an important weed in pastures, where it is difficult to eradicate and leads to land degradation in some Pacific Islands and Central America.
Enhancing the performance of dielectric elastomer actuators through the approach of distributed electrode array with fractal interconnects architecture
Authors: Burugupally Sindhu Preetham , Koppolu Bhargav , Danesh Negar , Lee Yongkuk , Indeewari Vidisha , Li Bin 
Published: April 2021

Abstract
Dielectric elastomer actuators fabricated from thin and miniaturized metal electrodes integrated with highly soft and stretchable elastomers offer the promise of opening new possibilities in the field of microrobotics. To achieve large displacements O(10−4) m at actuation voltages O(103) V in actuators with thin metal electrodes, the approach of distributed electrode array with fractal interconnects is proposed, where a single large electrode is replaced with an array of N small individual electrodes physically linked together with fractal interconnects. To investigate the effect of distributed electrode array with fractal interconnects on the static and dynamic response of the actuators, elastomer actuators with different electrode arrays—comprised of N ∈ {1,5,13,25} individual electrodes in the shape of circles—are fabricated and characterized. This study shows that the approach of distributed electrode array with fractal interconnects results in achieving large actuator displacements O(10−4) m at high speeds O(100) mm s−1, making these actuators suitable for driving microrobots.
An anti-biofilm material: polysaccharides prevent the precipitation reaction of silver ions and chloride ions and lead to the synthesis of nano silver chloride
Authors: Li Kun , Liu Zhaoxi , Liu Xiaoyu , Wang Lei , Zhao Jiayu , Zhang Xunlian , Kong Yun , Chen Min 
Published: April 2021

Abstract
The formation of biofilm is one of the causes of bacterial pathogenicity and drug resistance. Recent studies have reported a variety of anti-biofilm materials and achieved good results. However, it is still very important to develop some materials with wider application scenarios or higher biofilm resistance. In this study, a new method to rapidly synthesize nano silver chloride with anti-biofilm activity is proposed. It is a generalizable method in which bacterial extracellular polysaccharides are used to adsorb silver ions, thereby inhibiting the formation of white large-size silver chloride precipitates, and then ultraviolet light is used to induce the synthesis of small-sized nano silver chloride. A variety of polysaccharides can be utilized in the synthesis of nano silver chloride particles. The generated complex was characterized by XRD, UV–vis, EDX, FTIR and TEM methods. Further, the novel complex was found to show highly effective anti-biofilm and bactericidal activity within the biosafety concentration. In view of the high stability of nano sliver chloride, we propose that the novel nano material has the potential as a long-term antibacterial material.
The effects of laser pulse length and collisional ionization on the acceleration of titanium ions
Authors: Strehlow J , Kawahito D , Bailly-Grandvaux M , Beg F N , Petrov G M 
Published: April 2021

Abstract
The interaction of a relativistic laser pulse (

>

1018 W cm−2
µm2) with foil targets can accelerate ions to energies of tens of MeV u−1 with optimized laser and target parameters. We report the results on simulations of the interaction of a 6.0 × 1020 W cm−2 laser pulse incident on ultrathin (10–500 nm) titanium foils to investigate the roles of laser pulse duration and ionization mechanisms in the acceleration of titanium ions. While holding peak intensity constant, two laser pulse durations were investigated, 140 and 650 fs. The optimum thickness is dependent on pulse duration, as it requires the concurrence of target transparency with the incidence of the peak laser intensity. The collisional processes do not play a significant role in Ti ion beam generation from the 140 fs laser pulse duration at the optimum thickness (30 nm). However, for the 650 fs laser optimum, collisions improve the conversion efficiency of highly energetic (

>

10 MeV u−1), high charge titanium (Ti21 − 22 +) by a factor of 20, and the titanium ion cutoff energy by ∼15%. This improvement is due to the fact that collisional ionization increases the electron density of the plasma, which delays the time of relativistic transparency, causing collisions to decrease the optimum foil thickness from 150 to 100 nm. Additionally, collisional ionization increases the charge-to-mass ratio of the titanium, and injects more electrons into the accelerating sheath field. At the optimum thickness, target normal sheath acceleration is the dominant mechanism of acceleration, with additional contributions from radiation pressure and shock wave acceleration.
Heisenberg scaling precision in multi-mode distributed quantum metrology
Authors: Gramegna Giovanni , Triggiani Danilo , Facchi Paolo , Narducci Frank A , Tamma Vincenzo 
Published: April 2021

Abstract
We consider the estimation of an arbitrary parameter φ, such as the temperature or a magnetic field, affecting in a distributed manner the components of an arbitrary linear optical passive network, such as an integrated chip. We demonstrate that Heisenberg scaling precision (i.e. of the order of 1/N, where N is the number of probe photons) can be achieved without any iterative adaptation of the interferometer hardware and by using only a simple, single, squeezed light source and well-established homodyne measurements techniques. Furthermore, no constraint on the possible values of the parameter is needed but only a preliminary shot-noise estimation (i.e. with a precision of

N

) easily achievable without any quantum resources. Indeed, such a classical knowledge of the parameter is enough to prepare a single, suitable optical stage either at the input or the output of the network to monitor with Heisenberg-limited precision any variation of the parameter to the order of

1
/

N

without the need to iteratively modify such a stage.
Analysis of biomagnetic blood flow in a stenosed bifurcation artery amidst elastic walls
Authors: Anwar M A , Iqbal K , Razzaq M 
Published: April 2021

Abstract
In recent years, fluid-structure interaction (FSI) analysis has generated remarkable interest of researchers in interdisciplinary sciences problems, for instance, mechanical engineering, biomedical engineering, i.e., incorporating elastic wall behaviour in human arteries. Here, in this paper, we considered incompressible Newtonian blood flow and the elastic bifurcated artery wall in a non-uniform magnetic field. The considered model of Biomagnetic Fluid Dynamics (BFD) describes both magnetization and electrical conductivity of blood. Moreover, an Arbitrary Lagrangian-Eulerian (ALE) formulation is used by two-way fluid-structure interaction coupling of the problem. Finally, for discretization, a stable

P

2

P

1

finite element pair is employed to approximate the displacement, velocity and pressure spaces independently and the resulting nonlinear algebraic system is linearized by implementing the Newtons procedure. A quantitative analysis is made against Reynolds number Re and Hartmann number Ha on the bifurcated artery amidst elastic walls showing noticeable effects on recirculation. Also, the displacement field is plotted against Ha for different values of Re and their converse behaviour is observed. The decreasing behaviour for the wall shear stresses of the bifurcated artery are also drawn in context of Ha and Re. Finally, the conclusion is drawn at the end showing the significance of the elastic behaviour of artery walls.
Exact Christoffel-Darboux expansions: A new, multidimensional, algebraic, eigenenergy bounding method
Authors: Handy Carlos R 
Published: April 2021

Abstract
Although the Christoffel-Darboux representation (CDR) plays an important role within the theory of orthogonal polynomials, and many important bosonic and fermionic, multidimensional, Hermitian and Non-Hermitian, systems can be transformed into a moment equation representation (MER), the union of the two into an effective, algebraic, eigenenergy bounding method has been overlooked. This particular fusion of the two representations (CDR and MER), defines the Orthonormal Polynomial Projection Quantization—Bounding Method (OPPQ-BM), as developed here. We use it to analyze several one dimensional and two dimensional systems, including the quadratic Zeeman effect for strong-superstrong magnetic fields. For this problem, we match or surpass the excellent, but intricate, results of Kravchenko et al (1996 Phys. Rev. A
54 287) for a broad range of magnetic fields, without the need for any truncations or approximations. The methods developed here apply to any linear, partial differential equation eigen-parameter problem, hermitian or non-hermitian.
Neutrino mass constraints beyond linear order: cosmology dependence and systematic biases
Authors: Boyle Aoife , Schmidt Fabian 
Published: April 2021

Abstract
We demonstrate the impact on forecasted neutrino mass constraints of improving galaxy clustering and CMB lensing predictions from linear to next-to-leading-order power spectra. The redshift-space 1-loop power spectrum model we adopt requires an additional four free bias parameters, a velocity bias parameter and two new stochastic parameters. These additional nuisance parameters appreciably weaken the constraints on M

ν
. CMB lensing plays a significant role in helping to alleviate these degeneracies and tighten the final constraints. The constraint on the optical depth to reionisation τ has a strong effect on the constraint on M

ν
, but only when CMB lensing is included in the analysis to keep the degeneracies with the nuisance parameters under control. We also extract constraints when 1) using the BAO signature only as a distance probe, and 2) isolating the scale-dependence of the power spectrum, which, as shown in previous work, provides a cosmology-independent probe of M

ν
. All constraints except the latter remain strongly sensitive to the assumption of a flat ΛCDM universe. We perform an analysis of the magnitude of the shift introduced in the inferred M

ν
value when neglecting nonlinear corrections, and show that, for a Euclid-like survey, this shift becomes roughly equal to the 1σ constraint itself even with a conservative cut-off scale of k
max = 0.1 h Mpc-1. We also perform a calculation of the approximate expected bias in neutrino mass caused by not including the next, 2-loop order and expect a shift of only about 20% of the 1σ error for k
max = 0.2 h Mpc-1 in a Euclid-like survey.
Density dependence of ion cyclotron emission from deuterium plasmas in the large helical device
Authors: Reman B.C.G. , Dendy R.O. , Akiyama T. , Chapman S.C. , Cook J.W.S. , Igami H. , Inagaki S. , Saito K. , Seki R. , Kim M.H. , Thatipamula S.G. , Yun G.S. 
Published: April 2021

Abstract
Ion cyclotron emission (ICE) driven by perpendicular neutral beam-injected (NBI) deuterons, together with the distinctive ICE driven by tangential NBI, have been observed from heliotron–stellarator plasmas in the large helical device (LHD). Radio frequency radiation in the lower hybrid range has also been observed Saito K. et al (2018 Plasma Fusion Res.
13 3402043), with frequency dependent on plasma density. Here we focus on recent measurements of ICE from deuterium plasmas in LHD, which show substantial variation in spectral character, between otherwise similar plasmas that have different local density in the emitting region. We analyse this variation by means of first principles simulations, carried out using a particle-in-cell (PIC) kinetic approach. We show, first, that this ICE is driven by perpendicular NBI deuterons, freshly ionised near their injection point in the outer midplane edge of LHD. We find that these NBI deuterons undergo collective sub-Alfvénic relaxation, which we follow deep into the nonlinear phase of the magnetoacoustic cyclotron instability (MCI). The frequency and wavenumber dependence of the saturated amplitudes of the excited fields determine our simulated ICE spectra, and these spectra are obtained for different local densities corresponding to the different LHD ICE-emitting plasmas. The variation with density of the spectral character of the simulated ICE corresponds well with that of the observed ICE from LHD. These results from heliotron–stellarator plasmas complement recent studies of density-dependent ICE from tokamak plasmas in KSTAR Thatipamula S.G. et al (2016 Plasma Phys. Control. Fusion
58 065003); Chapman B. et al (2017 Nucl. Fusion
57 124004), where the spectra vary on sub-microsecond timescales after an ELM crash. Taken together, these results confirm the strongly spatially localised character of ICE physics, and reinforce the potential of ICE as a diagnostic of energetic ion populations and of the ambient plasma.
Studying and applying magnetic dressing with a Bell and Bloom magnetometer
Authors: Bevilacqua G , Biancalana V , Dancheva Y , Vigilante A 
Published: April 2021

Abstract
The magnetic dressing phenomenon occurs when spins precessing in a static field (holding field) are subjected to an additional strong alternating field. It is usually studied when such extra field is homogeneous and oscillates in one direction. We study the dynamics of spins under dressing condition in two unusual configurations. In the first instance, an inhomogeneous dressing field produces a space-dependent dressing phenomenon, which helps to operate the magnetometer in a strongly inhomogeneous static field. In the second instance, besides the usual configuration with a static and a strong orthogonal oscillating magnetic fields, we add a secondary oscillating field, which is perpendicular to both. The system shows novel and interesting features that are accurately explained and modelled theoretically. Possible applications of these novel features are briefly discussed.
Competitive light beam splitters based on complex interference wedged structures that use low-reflectivity components (Fresnel reflection)
Authors: Nenchev M , Deneva M , Marinova M 
Published: April 2021

Abstract
We demonstrate that interference wedge structures suitably composed of wedged purely glass elements using Fresnel reflection only can be effectively employed for realization of competitive light beam splitters and filters (especially for high-power laser beams). The theoretical analysis, simulation and experimental testing show that for appropriately chosen parameters and for a suitably composed interference complex such structures can achieve a controlled variable transmission in a wide range (99% – ∼30%) and reflection from ∼2% to ∼70%. The traditional realization of purely glass splitters ensures no more than ∼20% reflectivity. The splitters proposed are very compact sheet-like elements (e.g., 5×3×0.2 cm) and the splitting is implemented by sliding in the splitter’s plane. Thus, the propagation direction of the formed beams is preserved. The incident beam on the purely glass splitter (no dielectric or metallic mirrors) can be of high power and the influence of the air humidity is strongly reduced; also, cleaning the filter surfaces presents no difficulties. A single splitter can work in a wide range of wavelengths (IR, visible) without polarization dependence for incident angles up to ∼20°.
Quantitative determination of antimony in archaeological bronze artefacts by laser-induced breakdown spectroscopy
Authors: Tankova V , Mihailov V , Malcheva G , Penkova P , Leshtakov L 
Published: April 2021

Abstract
Laser-induced breakdown spectroscopy (LIBS) is a reliable, fast and micro-destructive diagnostic method for qualitative and quantitative analysis of a variety of materials. In this paper, we report the results of quantitative determination of antimony in four archaeological bronze artefacts analyzed by means of LIBS. For the purpose of this study, an approach of multi-elemental quantitative LIBS analysis is proposed, based on the use of an element with known concentration as an internal standard and measurement of the spectral lines intensities of the internal standard and the element with unknown concentration. An important plasma parameter which is included in the quantitative analysis is the excitation temperature as determined by the Boltzmann plot method. The quantity of antimony in the bronze artefacts obtained by means of the proposed LIBS approach is between 1.49% and 3.13%.
Optical filter based on metal-insulator-metal plasmonic coupled cavities
Authors: Lounis A , Hocini A , Ben salah H 
Published: April 2021

Abstract
In this study, an optical filter based on a plasmonic metal-insulator-metal (MIM) coupled waveguide resonator is simulated and investigated. Using the proposed structure leads to realizing a filter function between targeted wavelengths by manipulating the appropriate geometrical parameters of the resonators. Two-dimensional FDTD-based simulation is implemented to analyze the filter properties. The filter proposed proves to be a potential candidate for highly integrated optical circuit applications.