Miracle-dz/UniFAR-FTUs huggingface dataset:
Superconducting quantum criticality of topological surface states at three loops

First proposed in the context of elementary particle physics, supersymmetry is an exotic symmetry that relates bosons and fermions but has not yet been observed in nature. While the traditional expectation is that supersymmetry would be first observed in a high-energy physics experiment, an alternative possibility stressed recently is that supersymmetry could be realized as an emergent symmetry at long wavelengths and low energies in interacting many-particle systems. More specifically, it was suggested that supersymmetry emerges at the quantum phase transition between the gapless Dirac semimetal and a gapped superconductor on the surface of a 3D topological insulator. The authors of this paper provide additional support for the conjecture by performing a three-loop renormalization group calculation and showing that the supersymmetric fixed point in 2+1 dimensions remains stable to that order in perturbation theory.
The Effect of Aflatoxin B1 on Tumor-Related Genes and Phenotypic Characters of MCF7 and MCF10A Cells

The fungal toxin aflatoxin B1 (AB1) and its reactive intermediate, aflatoxin B1-8, 9 epoxide, could cause liver cancer by inducing DNA adducts. AB1 exposure can induce changes in the expression of several cancer-related genes. In this study, the effect of AB1 exposure on breast cancer MCF7 and normal breast MCF10A cell lines at the phenotypic and epigenetic levels was investigated to evaluate its potential in increasing the risk of breast cancer development. We hypothesized that, even at low concentrations, AB1 can cause changes in the expression of important genes involved in four pathways, i.e., p53, cancer, cell cycle, and apoptosis. The transcriptomic levels of BRCA1, BRCA2, p53, HER1, HER2, cMyc, BCL2, MCL1, CCND1, WNT3A, MAPK1, MAPK3, DAPK1, Casp8, and Casp9 were determined in MCF7 and MCF10A cells. Our results illustrate that treating both cells with AB1 induced cytotoxicity and apoptosis with reduction in cell viability in a concentration-dependent manner. Additionally, AB1 reduced reactive oxygen species levels. Phenotypically, AB1 caused cell-cycle arrest at G1, hypertrophy, and increased cell migration rates. There were changes in the expression levels of several tumor-related genes, which are known to contribute to activating cancer pathways. The effects of AB1 on the phenotype and epigenetics of both MCF7 and MCF10A cells associated with cancer development observed in this study suggest that AB1 is a potential risk factor for developing breast cancer.
Shear Horizontal Surface Waves in a Layered Piezoelectric Nanostructure with Surface Effects

This work aims to provide a fundamental understanding on the dispersive behaviors of shear horizontal (SH) surface waves propagating in a layered piezoelectric nanostructure consisting of an elastic substrate and a piezoelectric nanofilm by considering the surface effects. Theoretical derivation based on the surface piezoelectricity model was conducted for this purpose, and analytic expressions of the dispersion equation under the nonclassical mechanical and electrical boundary conditions were obtained. Numerical solutions were given to investigate the influencing mechanism of surface elasticity, surface piezoelectricity, surface dielectricity, as well as the surface density upon the propagation characteristics of SH surface waves, respectively. The results also reveal the size-dependence of dispersive behaviors, which indicates that the surface effects make a difference only when the thickness of the piezoelectric nanofilm stays in a certain range.
The exact solution of the Riemann problem in relativistic magnetohydrodynamics

We discuss the procedure for the exact solution of the Riemann problem in special relativistic magnetohydrodynamics (MHD). We consider both initial states leading to a set of only three waves analogous to the ones in relativistic hydrodynamics, as well as generic initial states leading to the full set of seven MHD waves. Because of its generality, the solution presented here could serve as an important test for those numerical codes solving the MHD equations in relativistic regimes.
The ROSAT Wide Field Camera all-sky survey of extreme-ultraviolet sources – I. The Bright Source Catalogue

The first all-sky survey for cosmic sources of extreme-ultraviolet radiation has been carried out with the UK Wide Field Camera on ROSAT. A first reduction of the survey data has yielded a catalogue of 383 relatively bright EUV sources, forming the WFC Bright Source Catalogue. This represents a 30-fold increase in the number of astrophysical objects detected in the ∼ 60-200 eV energy band and covers a flux range, in each of the two survey bands, of more than 2000. A search of the (typically ∼ 1-arcmin) error circles of the WFC sources, using a variety of catalogues and the SIMBAD data base, has identified probable optical counterparts of ∼73 per cent, including many active stars, white dwarf stars and a variety of other galactic and extragalactic objects
Principles and Applications of Loop-Mediated Isothermal Amplification to Point-of-Care Tests

For the identification of nucleic acids, which are important biomarkers of pathogen-mediated diseases and viruses, the gold standard for NA-based diagnostic applications is polymerase chain reaction (PCR). However, the requirements of PCR limit its application as a rapid point-of-care diagnostic technique. To address the challenges associated with regular PCR, many isothermal amplification methods have been developed to accurately detect NAs. Isothermal amplification methods enable NA amplification without changes in temperature with simple devices, as well as faster amplification times compared with regular PCR. Of the isothermal amplifications, loop-mediated isothermal amplification (LAMP) is the most studied because it amplifies NAs rapidly and specifically. This review describes the principles of LAMP, the methods used to monitor the process of LAMP, and examples of biosensors that detect the amplicons of LAMP. In addition, current trends in the application of LAMP to smartphones and self-diagnosis systems for point-of-care tests are also discussed.
Galaxy And Mass Assembly (GAMA): The M-Z relation for galaxy groups

The stellar mass and metallicity are among the fundamental parameters of galaxies. An understanding of the interplay between those properties as well as their environmental dependence will give us a general picture of the physics and feedback processes ongoing in groups of galaxies. We study the relationships and environmental dependencies between the stellar mass, and gas metallicity for more than 1900 galaxies in groups up to redshift 0.35 using the Galaxy And Mass Assembly (GAMA) survey. Using a control sample of more than 28000 star-forming field galaxies, we find evidence for a decrement of the gas metallicity for galaxies in groups. (© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Masques Photométriques et Détection des transits planétaires Dans le cadre de la mission CoRoT

Le mini-satellite Corot lance en 2006 utilisera la methode des transits : Une exoplanete signe son passage devant l'etoile par une breve baisse de flux inferieure au millieme. La stabilite et continuite de mesure seront assurees sur 150 jours pour 60. 000 etoiles afin d'augmenter le nombre de configurations favorables. La photometrie d'ouverture integre chaque flux dans un masque de lecture adapte aux multiples bruits, limite a 250 formes differentes pour 12. 000 cibles. J'ai etudie des methodes autorisant cette reduction sans perte notable de signal a bruit. Le tri efficace de masques aleatoires s'avere la plus satisfaisante. Pour la detection, j'ai developpe une methode qui rehausse le contraste des transits en eliminant les composantes des effets collectifs et de certains artefacts. Apres detection temporelle les systematiques sont identifiees, meme celles d'origine et de poids inconnus. On fait emerger de nouvelles detections en jaugeant la dispersion autour de ces composantes.
Disk entanglement entropy for a Maxwell field

In three dimensions, the pure Maxwell theory with compact U(1) gauge group is dual to a free compact scalar, and flows from the Maxwell theory with non-compact gauge group in the ultraviolet to a non-compact free massless scalar theory in the infrared. We com- pute the vacuum disk entanglement entropy all along this flow, and show that the renormalized entropy F (r) decreases monotonically with the radius r as predicted by the F-theorem, in- terpolating between a logarithmic growth for small r (matching the behavior of the S 3 free energy) and a constant at large r (equal to the free energy of the conformal scalar). The calculation is carried out by the replica trick, employing the scalar formulation of the theory. The Renyi entropies for n > 1 are given by a sum over winding sectors, leading to a Riemann- Siegel theta function. The extrapolation to n = 1, to obtain the von Neumann entropy, is done by analytic continuation in the large- and small-r limits and by a numerical extrapolation method at intermediate values. We also compute the leading contribution to the renormalized entanglement entropy of the compact free scalar in higher dimensions. Finally, we point out some interesting features of the reduced density matrix for the compact scalar, and its relation to that for the non-compact theory.
Wavelets for the Analysis of Microstrip Lines

Wavelets as basis functions in moment methods are known to lead to extremely sparse generalized impedance matrices. Thus, they are believed to be advantageous for the analysis of large microwave structures. In this paper different implementations and orders of spline based wavelets are compared. They are applied to a microstrip line, which exhibits singularities in the current distribution at the edges of the strip. We will show how infinitelysupported wavelets can be used for problems on such boundedintervals and how one can benefitfrom translation symmetriesof the underlyingB-splines.
Insight into fiber Bragg sensor response at 100-MHz interrogation rates under various dynamic loading conditions

A 100 MHz fiber Bragg grating (FBG) interrogation system is described and applied to strain, pressure, and shock position sensing. The approach relies on coherent pulse illumination of the FBG sensor with a broadband short pulse from a femtosecond modelocked erbium fiber laser. After interrogation of the FBG sensor, a long multi-kilometer run of single mode fiber was used for chromatic dispersion to temporally stretch the spectral components of the reflected pulse from the FBG sensor. Dynamic strain or pressure induced spectral shifts in the FBG sensor were detected as a pulsed time domain waveform shift after encoding by the chromatic dispersive line. Signals were recorded using a single 35 GHz photodetector and a 25 GHz bandwidth digitizing oscilloscope. Application of this approach to high-speed strain sensing of magnetic materials in pulsed magnetic fields to ~150 T is demonstrated. The FBG wavelength shifts were used to study magnetic field driven magnetostriction effects in LaCoO3. A sub-microsecond temporal shift in the FBG sensor wavelength attached to the sample under first order phase change appears as a fractional length change (strain: ΔL/L<10-4) in the material. A second application to FBG sensing of pressure dynamics to nearly 2 GPa in the thermal ignition of the high explosive PBX-9501 is also demonstrated. Then, as final demonstration, we use a chirped FBG (CFBG) to resolve shock propagation dynamics in 1-D from an explosive detonation that produces fragmentation in an inert confinement vessel. These applications demonstrate the use of this FBG interrogation system in dynamical extreme conditions that would otherwise not be possible using traditional FBG interrogation approaches that are deemed too slow to resolve such events.
Developing an Effective Online Based Training Questionnaire for Higher Education Training Provider: A Pilot Analysis

Over close to two decades, many organizations have gradually paved ways for employees to undertake more online training as means of obtaining and renewing knowledge deemed necessary to perform their tasks. The recent Covid-19 pandemic has resulted in many employees having to upskill and reskill not only their IT-related abilities but also on how to communicate, work collaboratively and engage in business differently from usual. Because work must continue, employees need to be continuously educated and trained to ensure they can be effective at work. However, not much is known about online-based training determinants that influence training effectiveness. This study therefore attempts to investigate determinants for effective online-based training (OBT) and develop a questionnaire for effective OBT in higher education setting. The study was conducted in three phases: (i) Phase I – Identification of determinants, (ii) Phase II – Development of questionnaire, and (iii) Phase III – Pilot study. Phase I involved literature analysis using thematic analysis to identify determinants, Phase II involved experts (n=3) and Higher Learning Institution (HLI) staff (n=30) to develop the questionnaire, and Phase III involved a pilot study to test the reliability of the questionnaire. The Cronbach’s Alpha results showed all proposed determinants are consistent and acceptable except Personality Traits and Attitude with only 0.515 and 0.295, respectively. Several steps have been put forward as mechanisms to enhance the overall quality and integrity of the OBT questionnaire. The questionnaire is also expected to provide useful feedback on how OBT sessions can be continuously improved in the future © 2022, Asian Journal of University Education.All Rights Reserved.
Helical Magnetic Fields from Inflation

We analyze the generation of seed magnetic fields during de Sitter inflation considering a noninvariant conformal term in the electromagnetic Lagrangian of the form , where I(ϕ) is a pseudoscalar function of a nontrivial background field ϕ. In particular, we consider a toy model that could be realized owing to the coupling between the photon and either a (tachyonic) massive pseudoscalar field or a massless pseudoscalar field nonminimally coupled to gravity, where I follows a simple power law behavior I(k,η) = g/(-kη)β during inflation, while it is negligibly small subsequently. Here, g is a positive dimensionless constant, k the wave number, η the conformal time, and β a real positive number. We find that only when β = 1 and 0.1 ≲ g ≲ 2 can astrophysically interesting fields be produced as excitation of the vacuum, and that they are maximally helical.
Comparative evaluation of midline versus parasagittal interlaminar epidural steroid injection for management of symptomatic lumbar intervertebral disc herniation

Background and Aims: Epidural steroid injections (ESIs) with or without local anaesthetics have been used for the past several years for the treatment of back pain, especially for radicular symptoms. The aim of this prospective study was to compare the efficacy of midline with parasagittal approach for interlaminar ESI in the management of symptomatic lumbar intervertebral disc herniation. Methods: Sixty patients (aged 20–60 years) with pain pattern consistent with lumbar radiculopathy caused by lumbar intervertebral disc herniation and who did not respond to conservative treatment were included in the study. They were randomly divided in two groups of 30 each: group I (MILESI, n = 30) consisting of midline interlaminar ESI, and group II (PSILESI, n = 30) consisting of parasagittal interlaminar ESI. They were administered a combination of 80 mg of methylprednisolone acetate (40 mg/ml) and 6 ml of 0.25% bupivacaine (total volume of 8 ml). Pain, patient satisfaction, and the Oswestry Disability Index (ODI) were assessed at different time intervals before and after the procedure for up to six months. Results: The improvement in pain score after ESI was statistically significant in both the groups at all intervals of time, with no significant difference between the two groups. The mean pain score was <3 from two weeks onwards after the injection. The pain score decreased by more than five points and it was around two points at the end of the six-month study period. Around 50% of patients in both groups had excellent satisfaction. Conclusion: Both techniques were effective in providing good analgesia. Pain relief and improvement in disability were clinically better with the parasagittal interlaminar approach.
ENVIRONMENTAL DEPENDENCE OF THE KENNICUTT–SCHMIDT RELATION IN GALAXIES

We present a detailed description of a phenomenological H2 formation model and local star formation prescription based on the density of molecular (rather than total) gas. Such an approach allows us to avoid the arbitrary density and temperature thresholds typically used in star formation recipes in galaxy formation simulations. We present results of the model based on realistic cosmological simulations of high-z galaxy formation for a grid of numerical models with varied dust-to-gas ratios and interstellar far-UV (FUV) fluxes. Our results show that both the atomic-to-molecular transition on small, tens-of-parsec scales and the Kennicutt–Schmidt (K-S) relation on large, kiloparsec scales are sensitive to the dust-to-gas ratio and the FUV flux. The atomic-to-molecular transition as a function of gas density or column density has a large scatter but is rather sharp and shifts to higher densities with decreasing dust-to-gas ratio and/or increasing FUV flux. Consequently, star formation is concentrated to higher gas surface density regions, resulting in steeper slope and lower amplitude of the K-S relation at a given ΣH, in less dusty and/or higher FUV flux environments. We parameterize the dependences observed in our simulations in convenient fitting formulae, which can be used to model the dependence of the K-S relation on the dust-to-gas ratio and FUV flux in semi-analytic models and in cosmological simulations that do not include radiative transfer and H2 formation. Finally, we show that ionized gas can contribute a significant fraction of the total gas surface density in environments typical for high-redshift galaxies.
Predictors of postpartum hemorrhage in vaginal deliveries: Retrospective observational study

--- In this study we aimed to identify the risk factors for acute postpartum hemorrhage in pregnant women. We investigated a number of potential risk factors, including the maternal age, gestational age, parity, birth weight, single or multiple pregnancies, episiotomy, tears requiring vaginal or perineal suturing, and placental retention. Data from 1628 deliveries performed from 2019 to 2020 were included. The maternal age ranged between 18 to 41 years, with a mean age of 26.6±3.2 years. The average blood loss postpartum was 234.4±229.7 ml. Among traditionally delivered patients, 309 (18.9%) experienced standard postpartum hemorrhage while of 27 (1.65%) had severe postpartum blood loss. Retained placenta was the major risk factor for both standard and severe postpartum hemorrhage (OR=4.31, 95% CI 1.85-10.04, p<0.001 vs OR=10.25, 95% CI 2.13-49.2, p<0.01). Similarly multiple pregnancy, macrosomia as well as episiotomy was associated with any postpartum hemorrhage. Women with previous history of deliveries and low weight neonates were less likely to experience postpartum hemorrhage (OR=0.69, 95% CI 0.54-0.90, p=0.006 and OR=0.54, 95% CI 0.29-0.97, p=0.04). Risk variables for postpartum hemorrhage were macrosomia, retained placenta, episiotomy, multiple pregnancy, and the necessity for perineal suture. Low birth weight and multiparity have been identified as protective factors for standard postpartum hemorrhage.
Vertical wind observation in the tropical upper troposphere by VHF wind profiler: A case study

Features of upper tropospheric vertical wind (W) over Sumatra, Indonesia, are presented using data observed by a VHF wind profiler installed at West Sumatra (0.2°S, 100.32°E). During 5–9 May 2004, W from the middle to upper troposphere (8–14 km) changed in accordance with the cumulus activity over Sumatra. During 5–6 May, 3‐hourly averaged W continuously showed upward motions up to 0.09 m s−1. The upward motions were observed in the vicinity of deep convective events, which were continuously seen over Sumatra within a synoptic‐scale convectively active envelope. After 7 May, when cumulus activity was suppressed over Sumatra, 3‐hourly averaged upward motions of greater than 0.05 m s−1 almost disappeared. During 5–6 May, downward motions up to ∼0.11 m s−1 were observed above 14 km, while upward motions were observed below 14 km. Estimation of W by the European Centre for Medium‐Range Weather Forecasts operational analysis have revealed that a major part of observed downward motions above 14 km is explained by the leeward (southwestward) wind and leeward downward tilt of isentropes that existed over western Sumatra. The observed downward motions above 14 km during 5–6 May suggest that downward motions caused by leeward downward tilt of isentropes can be produced in the vicinity of the convectively active region, and leeward downward tilt of isentropes can suppress an upward transport of air mass into the tropical tropopause layer (TTL) by producing downward motions in the TTL.
A Model for the Superoutburst Phenomenon of SU Ursae Majoris Stars

Un modele d'etoiles de type SU UMa, naines blanches presentant un cycle d'eruptions constitue de plusieurs petites eruptions et d'une longue supereruption, est developpe. Ce modele considere les instabilites thermiques et tidales du disque d'accretion. Une application aux etoiles VW Hyi et Z Cha est realisee.
The magnetic field and spectral variability of the He-weak star HR 2949

We analyze a high resolution spectropolarimetric dataset collected for the He-weak B3p IV star HR 2949. The Zeeman effect is visible in the circularly polarized component of numerous spectral lines. The longitudinal magnetic field varies between approximately $-650$ and $+150$ G. The polar strength of the surface magnetic dipole is calculated to be 2.4$^{+0.3}_{-0.2}$ kG. The star has strong overabundances of Fe-peak elements, along with extremely strong overabundances of rare-earth elements; however, He, Al, and S are underabundant. This implies that HR 2949 is a chemically peculiar star. Variability is seen in all photospheric lines, likely due to abundance patches as seen in many Ap/Bp stars. Longitudinal magnetic field variations measured from different spectral lines yield different results, likely a consequence of uneven sampling of the photospheric magnetic field by the abundance patches. Analysis of photometric and spectroscopic data for both HR 2949 and its companion star, HR 2948, suggests a revision of HR 2949's fundamental parameters: in particular, it is somewhat larger, hotter, and more luminous than previously believed. There is no evidence of optical or ultraviolet emission originating in HR 2949's magnetosphere, despite its moderately strong magnetic field and relatively rapid rotation; however, when calculated using theoretical and empirical boundaries on the initial rotational velocity, the spindown age is compatible with the stellar age. With the extensive phase coverage presented here, HR 2949 will make an excellent subject for Zeeman Doppler Imaging.