Miracle-dz/UniFAR-FTUs huggingface dataset:
STRUCTURE AND EVOLUTION OF CIRCUMBINARY DISKS AROUND SUPERMASSIVE BLACK HOLE BINARIES

We explore properties of circumbinary disks around supermassive black hole (SMBH) binaries in centers of galaxies by reformulating standard viscous disk evolution in terms of the viscous angular momentum flux FJ. If the binary stops gas inflow and opens a cavity in the disk, then the inner disk evolves toward a constant-FJ (rather than a constant ) state. We compute disk properties in different physical regimes relevant for SMBH binaries, focusing on the gas-assisted evolution of systems starting at separations 10−4 − 10−2 pc, and find the following. (1) Mass pileup at the inner disk edge caused by the tidal barrier accelerates binary inspiral. (2) Binaries can be forced to merge even by a disk with a mass below that of the secondary. (3) Torque on the binary is set non-locally, at radii far larger than the binary semi-major axis; its magnitude does not reflect disk properties in the vicinity of the binary. (4) Binary inspiral exhibits hysteresis—it depends on the past evolution of the disk. (5) The Eddington limit can be important for circumbinary disks even if they accrete at sub-Eddington rates, but only at late stages of the inspiral. (6) Gas overflow across the orbit of the secondary can be important for low secondary mass, high- systems, but mainly during the inspiral phase dominated by the gravitational wave emission. (7) Circumbinary disks emit more power and have harder spectra than constant disks; their spectra are very sensitive to the amount of overflow across the secondary orbit.
Determinants of farmland degradation among farming households in West Guji Zone, Ethiopia

Abstract This paper aimed to examine the determinants of farmland degradation in the West Guji Zone. The study employed data collected in 2020 from a sample of 385 farm households selected using a simple random sampling technique. An ordered probit model was run to examine the association of explanatory variables with the severity of farmland degradation. Farm plot assessment results indicate that most farm plots were categorized as slightly degraded, followed by moderate, non-degraded, and severe degradation statuses. The study indicated that the main causes of farmland degradation were intensive cultivation without fallow, deforestation, high precipitation, overgrazing, steep slopes, and wind. The ordered probit results revealed that age of household heads, number of plots, and slope of the farmland positively and significantly influenced the severity of farmland degradation, while sex of household heads, soil conservation status, family size, education, land-to-labor ratio, and extension contact were negatively and significantly associated with the severity of farmland degradation. Therefore, the study suggests the provision of training to farming households, promotion of cost-effective modern feed resources and homemade biogas, implementation of a participatory management approach, scaling-up existing land management practices, ensuring the sustainability of natural resource use, and a close linkage between farmers and extension agents to minimize farmland degradation.
Theory of real supersolids

We review the main properties of a supersolid. We describe first the macroscopic equation that satisfies a supersolid based on general arguments and symmetries and show that such solids might exhibit simultaneously or independently both elastic behavior and superfluidity. We then explain why a supersolid state should exist for solids at very low temperature but with a very small superfluid fraction. Finally, we propose a mean-field model, based on the Gross-Pitaevski\u{\i} equation, which presents the general properties expected for a supersolid and should therefore provide a consistent framework to study its dynamical properties.
Long-term Spot Stability in the Post-common-envelope Binary QS Vir

We observed the post-common-envelope eclipsing binary with a white dwarf component, QS Vir, using the 1.88 m telescope of Kotammia Observatory in Egypt. The new observations were analyzed together with all multicolor light curves available online (sampling a period of 25 yr), using a full-feature binary system modeling software based on Roche geometry. This is the first time complete photometric modeling was done with most of these data. QS Vir is a detached system, with the red dwarf component underfilling its Roche lobe by a small margin. All light curves feature out-of-eclipse variability that is associated with ellipsoidal variation, mutual irradiation and irregularities in surface brightness of the tidally distorted and magnetically active red dwarf. We tested models with one, two, and three dark spots and found that one spot is sufficient to account for the light curve asymmetry in all data sets, although this does not rule out the presence of multiple spots. We also found that a single spotted model cannot fit light curves observed simultaneously in different filters. Instead, each filter requires a different spot configuration. To thoroughly explore the parameter space of spot locations, we devised a grid-search procedure and used it to find consistent solutions. Based on this, we conclude that the dark spot responsible for light curve distortions has been stable for the past 15 yr, after a major migration that happened between 1993 and 2002, possibly due to a flip-flop event.
Development of a New Colorimetric, Kinetic and Automated Ceruloplasmin Ferroxidase Activity Measurement Method

Background: Ceruloplasmin plays an important role in the regulation of iron metabolism. Ceruloplasmin is an acute-phase protein known to have many metabolic effects. Its activity increases during infection, inflammation, and compensation of oxidation. In the current study, our aim is to develop a new method for the measurement of ferroxidase activity without requiring any chromogen. Methods: Venous blood samples were collected into serum separator tubes. Ferric iron ions formed by the enzyme ferroxidase were measured, both manually and fully automatically, at the 415 nm wavelength without using chromogen. These results were compared to conventional ferroxidase measurement methods and to the immunoturbidimetric ceruloplasmin measurement method. Results: The detection limit of the new assay was 14.8 U/L. The upper limit of the linearity was 1380 U/L. Precision values were calculated for high, medium, and low levels of ferroxidase activity in serum pool. The coefficient of variation was <5% for each level. Conclusion: In the present method, chromogens are not used. With its considerably low cost and short reaction time, this method is able to provide fast results, can be performed easily, and makes accurate measurements.
The high resolution X-ray spectrum of SNR 0506-68 using XMM-Newton

Aims. We study the supernova remnant 0506-68 in order to obtain detailed information about, among other things, the ionisation state and age of the ionised plasma. Methods. Using the Reflection Grating Spectrometer (RGS) onboard the XMM-Newton satellite we are able to take detailed spectra of the remnant. In addition, we use the MOS data to obtain spectral information at higher energies. Results. The spectrum shows signs of recombination and we derive the conditions for which the remnant and SNR in general are able to cool rapidly enough to become over-ionised. The elemental abundances found are mostly in agreement with the mean LMC abundances. Our models and calculations favour the lower age estimate mentioned in the literature of ∼4000 year.
The asymmetry of the dimension 2 gluon condensate: the finite temperature case

In this paper, we continue the work begun in a previous article. We compute, in the formalism of local composite operators, the value of the asymmetry in the dimension two condensate for finite temperatures. We find a positive value for the asymmetry, which disappears when the temperature is increased. We also compute the value of the full dimension two condensate for higher temperatures, and we find that it decreases in absolute value, finally disappearing for sufficiently high temperature. We also comment on the temperature dependence of the electric and magnetic components of the condensate separately. We compare our results with the corresponding lattice date found by Chernodub and Ilgenfritz.
Discrete-time Implementation of Adaptive Estimation in the Transverse Dynamic Force Microscope

In this paper, we investigate an estimation problem in a Transverse Dynamic Force Microscope (TDFM). The dynamics of its cantilever is considered for which an approximate finite dimensional model is obtained by using a truncated method. With this model, discrete-time estimators are proposed to estimate the parameters of the shear force between the cantilever and the specimen. Numerical simulations were conducted to show the effectiveness of the proposed methods.
Attractive Dipolar Coupling between Stacked Exciton Fluids

The interaction between aligned dipoles is long-ranged and highly anisotropic: it changes from repulsive to attractive depending on the relative positions of the dipoles. We report on the observation of the attractive component of the dipolar coupling between excitonic dipoles in stacked semiconductor bilayers. We show that the presence of a dipolar exciton fluid in one bilayer modifies the spatial distribution and increases the binding energy of excitonic dipoles in a vertically remote layer. The binding energy changes are explained by a many-body polaron model describing the deformation of the exciton cloud due to its interaction with a remote dipolar exciton. The results open the way for the observation of theoretically predicted new and exotic collective phases, the realization of interacting dipolar lattices in semiconductor systems as well as for engineering and sensing their collective excitations.
Synthesis and physical properties of FeSe1/2Te1/2 superconductor

One of the most important properties of very recently reported FeSe based superconductors is the robustness of their superconductivity under applied magnetic field. The synthesis and control of superconductivity in FeSe based compounds is rather a difficult task. Synthesis and physical property characterization for optimized superconductivity of FeSe1/2Te1/2 at 13 K is reported here. The compound crystallized in a tetragonal structure with lattice parameters a=3.8015(2) and c=6.0280(4) A. Magnetization measurements indicated bulk superconductivity with lower critical field (Hc1) of around 180 Oe. By applying Ginzburg–Landau theory, the Hc2(0) value is estimated to be ∼1840 kOe for the 90% of resistive transition. A heat capacity measurement revealed bulk superconductivity by a hump at Tc near 13 K and an expected decrease in the same was observed under an applied magnetic field.
Blood Urea Nitrogen to Albumin Ratio is a Predictor of Mortality among Hospitalized Geriatric Patients with COVID-19.

: Aim : This study aims to determine predictors of mortality among hospitalized geriatric patients with COVID-19 with a particular concern about the predictive value of blood urea nitrogen to albumin ratio (BAR). Methods : A retrospective cohort study included 114 geriatric patients (aged ≥ 60 years) admitted to a geriatrics hospital for isolation. A review of the medical files of participants was conducted to extract data regarding age, sex, comorbidities, clinical manifestations of COVID-19 and laboratory data including haematology, biochemistry and inflammatory markers on admission. BAR and Charlson comorbidity index (CCI) were calculated. The primary outcome was in-hospital mortality. Appropriate statistical analyses were operated. RESULTS : 59 (51.8%) patients died at the hospital. Comorbidities associated with mortality included diabetes mellitus, old stroke, hypertension, and cardiac disease besides higher CCI. Reporting of fever, fatigue, sore throat and delirium /altered mental status were also associated with mortality. Significant biomarkers included lower hemoglobin and serum albumin, higher total leukocyte count, serum creatinine, blood urea nitrogen, lactate dehydrogenase, D-dimer, c-reactive protein (CRP) and BAR. BAR at a cutoff of 12.92 mg/gm had the best predictive performance for mortality. Serum BAR > 12.92 mg/gm, albumin < 3.05 g/dl and CRP > 108 mg/l were independent predictors of in-hospital mortality CONCLUSION : Serum BAR > 12.92 mg/gm, albumin < 3.05 g/dl and CRP > 108 mg/l are independent predictors of mortality among hospitalized geriatric patients with COVID-19. BAR is a convenient biomarker and has the best predictive performance to early pick up COVID-19 geriatric patients at high risk of mortality.
Diallel Analysis of Grain Yield and Some Other Traits in Yellow Maize (Zea mays L.) Inbred Lines

: Eight advanced inbred lines derived from different yellow maize populations were crossed in a half diallel mating scheme in 2010 season at Gemmeiza Agric. Res. Station. The resultant 28 crosses along with two commercial check hybrids i.e. SC 166 and SC 173 were evaluated at two locations i.e. Gemmeiza and Mallawy Agric. Res. Stations in 2011 season. Mean squares due to crosses, G.C. A. and S.C. A. were highly significant for all studied traits. The ratio of Ʃg2i/ ƩS2ij indicated that the non-additive gene effects played the major role in the inhertance of all the studied traits. For grain yield, one parental inbred line P3 had significant positive GCA effects and six crosses P1xP2, P1xP6, P2xP4, P3xP8, P5xP7 and P6xP7 had significant or highly significant positive SCA effects. One cross P3xP8 gave similar productivity to that of SC 166. Also two crosses P3xP5 and P5xP7 exhibited similar yield performance to that of the check hybrid SC 173, since no significant difference. These promising crosses may be released as commercial hybrids by maize research program after further testing.
FIRST MAGNETIC FIELD MODELS FOR RECENTLY DISCOVERED MAGNETIC β CEPHEI AND SLOWLY PULSATING B STARS

In spite of recent detections of magnetic fields in a number of β Cephei and slowly pulsating B (SPB) stars, their impact on stellar rotation, pulsations, and element diffusion has not yet been sufficiently studied. The reason for this is the lack of knowledge of rotation periods, the magnetic field strength distribution and temporal variability, and the field geometry. New longitudinal field measurements of four β Cephei and candidate β Cephei stars, and two SPB stars were acquired with FORS 2 at the Very Large Telescope. These measurements allowed us to carry out a search for rotation periods and to constrain the magnetic field geometry for four stars in our sample.
First detection of H$_2$S in a protoplanetary disk. The dense GG Tau A ring.

Studying molecular species in protoplanetary disks is very useful to characterize the properties of these objects, which are the site of planet formation. We attempt to constrain the chemistry of S-bearing molecules in the cold parts of circumstellar disk of GG Tau A. We searched for H$_2$S, CS, SO, and SO$_2$ in the dense disk around GG Tau A with the NOrthem Extended Millimeter Array (NOEMA) interferometer. We detected H$_2$S emission from the dense and cold ring orbiting around GG Tau A. This is the first detection of H$_2$S in a protoplanetary disk. We also detected HCO$^+$, H$^{13}$CO$^+$, and DCO$^+$ in the disk. Upper limits for other molecules, CCS, SO$_2$, SO, HC$_3$N, and $c$-C$_3$H$_2$ are also obtained. The observed DCO$^+$/HCO$^+$ ratio is similar to those in other disks. The observed column densities, derived using our radiative transfer code DiskFit, are then compared with those from our chemical code Nautilus. The column densities are in reasonable agreement for DCO$^{+}$, CS, CCS, and SO$_2$. For H$_2$S and SO, our predicted vertical integrated column densities are more than a factor of 10 higher than the measured values. Our results reinforce the hypothesis that only a strong sulfur depletion may explain the low observed H$_2$S column density in the disk. The H$_2$S detection in GG Tau A is most likely linked to the much larger mass of this disk compared to that in other T Tauri systems.
Charge Dependence and Scaling Properties of Dynamical $K/\pi$, $p/\pi$, and $K/p$ Fluctuations from the STAR Experiment

Dynamical fluctuations in global conserved quantities such as baryon number, strangeness, or charge may be enhanced near a QCD critical point. Charge dependent results from new measurements of dynamical $K/\pi$, $p/\pi$, and $K/p$ ratio fluctuations are presented. The STAR experiment has performed a comprehensive study of the energy dependence of these dynamical fluctuations in Au+Au collisions at the energies $\sqrt{s_{NN}}$ = 7.7-200 GeV using the observable, $\nu_{\rm dyn}$. These results are compared to previous measurements and to theoretical predictions. Various proposed scaling scenarios that attempt to remove the intrinsic volume dependence of $\nu_{\rm dyn}$ and to simplify comparisons between experimental measurements are also considered. Constructing an intensive quantity allows for a direct connection to thermodynamic predictions.
Recent advances in 2D organic−inorganic heterostructures for electronics and optoelectronics

Two‐dimensional (2D) materials show outstanding properties such as dangling bond‐free surfaces, strong in‐plane while weak out‐of‐plane bonding, layer‐dependent electronic structures, and tunable electronic and optoelectronic properties, making them promising for numerous applications. Integrating 2D inorganics with organic materials to make van der Waals heterostructures at the 2D thickness limit has created new platforms for fabricating on‐demand multifunctional devices. To further broaden the limited choices of 2D inorganic‐based heterostructures, a wide range of available 2D organic materials with tunable properties have opened new opportunities for designing large numbers of heterostructures with 2D inorganic materials. This review aims to attract the attention of researchers toward this emerging 2D organic−inorganic field. We first highlight recent progress in organic−inorganic heterostructures and their synthesis and then discuss their potential applications, such as field‐effect transistors, photodetectors, solar cells, and neuromorphic computing devices. In the end, we present a summary of challenges and opportunities in this field.
MULTI-WAVELENGTH STUDIES OF SPECTACULAR RAM-PRESSURE STRIPPING OF A GALAXY. II. STAR FORMATION IN THE TAIL

With multiband photometric data in public archives, we detected four intracluster star-forming regions in the Virgo Cluster. Two of them were at a projected distance of 35 kpc from NGC 4388 and the other two were 66 kpc away. Our new spectroscopic observations revealed that their recessional velocities were comparable to the ram-pressure-stripped tail of NGC 4388 and confirmed the association. The stellar mass of the star-forming regions ranged from 104 to 104.5 M☉ except for that of the faintest one, which was <103 M☉. The metallicity was comparable to a solar abundance and the age of the stars was ∼106.8 yr. Their young stellar age meant that the star formation should have started after the gas was stripped from NGC 4388. This implied in situ condensation of the stripped gas. We also found that two star-forming regions were located near the leading edge of a filamentary dark cloud. The extinction of the filament was smaller than that derived from the Balmer decrement of the star-forming regions, implying that the dust in the filament would be locally dense around the star-forming regions.
HOYLE–LYTTLETON ACCRETION IN THREE DIMENSIONS

We investigate the stability of gravitational accretion of an ideal gas onto a compact object moving through a uniform medium at Mach 3. Previous three-dimensional simulations have shown that such accretion is not stable, and that strong rotational “disk-like” flows are generated and accreted on short timescales. We re-address this problem using overset spherical grids that provide a factor of seven improvement in spatial resolution over previous simulations. With our higher spatial resolution we found these three-dimensional accretion flows remained remarkably axisymmetric. We examined two cases of accretion with different sized accretors. The larger accretor produced very steady flow, with the mass accretion rate varying by less than 0.02% over 30 flow times. The smaller accretor exhibited an axisymmetric breathing mode that modulated the mass accretion rate by a constant 20%. Nonetheless, the flow remained highly axisymmetric with only negligible accretion of angular momentum in both cases.
E-WALLET: MAKE USERS MORE CONSUMPTIVE?

This study aims to determine the differences in consumer behaviour before and after having an e-wallet. The unit of analysis is students by taking a sample of STIE Bank BPD Jateng students. The analytical method used is the Paired Sample T-Test to prove whether there are significant differences. The results of this study indicate that there are differences in consumptive behaviour before and after having an e-wallet.
Gaseous Galaxy Halos

Galactic halo gas traces inflowing star-formation fuel and feedback from a galaxy's disk and is therefore crucial to our understanding of galaxy evolution. In this review, we summarize the multiwavelength observational properties and origin models of Galactic and low-redshift spiral galaxy halo gas. Galactic halos contain multiphase gas flows that are dominated in mass by the ionized component and extend to large radii. The densest, coldest halo gas observed in neutral hydrogen (Hi) is generally closest to the disk (<20 kpc), and absorption line results indicate warm and warm-hot diffuse halo gas is present throughout a galaxy's halo. The hot halo gas detected is not a significant fraction of a galaxy's baryons. The disk-halo interface is where the multiphase flows are integrated into the star-forming disk, and there is evidence for both feedback and fueling at this interface from its temperature and kinematic gradients, and Hi structures. The origin and fate of halo gas are considered in the context of c.
Stellar Velocity Dispersion: Linking Quiescent Galaxies to Their Dark Matter Halos

We analyze the Illustris-1 hydrodynamical cosmological simulation to explore the stellar velocity dispersion of quiescent galaxies as an observational probe of dark matter halo velocity dispersion and mass. Stellar velocity dispersion is proportional to dark matter halo velocity dispersion for both central and satellite galaxies. The dark matter halos of central galaxies are in virial equilibrium and thus the stellar velocity dispersion is also proportional to dark matter halo mass. This proportionality holds even when a line-of-sight aperture dispersion is calculated in analogy to observations. In contrast, at a given stellar velocity dispersion, the dark matter halo mass of satellite galaxies is smaller than virial equilibrium expectations. This deviation from virial equilibrium probably results from tidal stripping of the outer dark matter halo. Stellar velocity dispersion appears insensitive to tidal effects and thus reflects the correlation between stellar velocity dispersion and dark matter halo mass prior to infall. There is a tight relation (≲0.2 dex scatter) between line-of-sight aperture stellar velocity dispersion and dark matter halo mass suggesting that the dark matter halo mass may be estimated from the measured stellar velocity dispersion for both central and satellite galaxies. We evaluate the impact of treating all objects as central galaxies if the relation we derive is applied to a statistical ensemble. A large fraction (≳2/3) of massive quiescent galaxies are central galaxies and systematic uncertainty in the inferred dark matter halo mass is ≲0.1 dex thus simplifying application of the simulation results to currently available observations.