Miracle-dz/UniFAR-FTUs huggingface dataset:
Morphologies introduced by bistability in barred-spiral galactic potentials

We investigate the orbital dynamics of a barred-spiral model when the system is rotating slowly and corotation is located beyond the end of the spiral arms. In the characteristic of the central family of periodic orbits we find a “bistable region” . In the response model we observe a ring surrounding the bar and spiral arms starting tangenti al to the ring. This is a morphology resembling barred-spiral systems with inner rings. However, the dynamics associated with this structure in the case we study is different from that of a typical bar ending close to corotation. The ring of our model is round, or rather elongated perpendicular to the bar. It is associated with a folding (an “S” shaped feature) of the characteristic of the central family, which is typical in bistable bifurcations. Along the “S” part of the c haracteristic we have a change in the orientation of the periodic orbits from a x1-type to a x 2-type morphology. The orbits populated in the response model change rather abruptly their orientation when reaching the lowest energy of the “S”. The spirals of the model follow a standard “precessing ellipses flow” and the orbits building them have energies beyond the “S” region. The bar is structured mainly by sticky orbits from regions around the stability islands o f the central family. This leads to the appearance of X-features in the bars on the galactic plane. Such a bar morphology appears in the unsharp-masked images of some moderately inclined galaxies.
Highly Speciﬁc Silver Ion Detection by Fluorescent Carbon Quantum Dots

: Nitrogen-doped carbon quantum dots are easily obtainable nanomaterials endowed with remarkable ﬂuorescence properties for the detection of contaminations by heavy metals. In this report, we show that nanometric particles with high speciﬁcity for silver cations can be prepared by hydrothermal synthesis starting from citric and folic acid solutions. Solutions of these N-CQDs give a strong ﬂuorescence emission in the violet region (385 nm) when excited at 330 nm, which can be quenched selectively by silver (I) cations at sub-nanomolar concentrations, while other cations do not give any effect. This remarkable feature was tentatively correlated with the stronger interactions between silver ion and small portions of the nanomaterial surface by comparing Ag + and the isoelectronic Cd 2+ .
Ultra-weak protein-protein interactions can modulate proteome-wide searching and binding

Research on protein-protein interaction (PPIs) tends to focus on high affinity interactions. Weaker interactions (Kd >1μM) recently understood as contributing to intracellular phase separation suggest that even-weaker PPIs might also matter in as-yet unknown ways. However, ultra-weak PPIs (Kd >1mM) are not readily accessible by in vivo techniques. Here we use protein electrostatics to estimate PPI strengths and spatially-resolved dynamic simulations to investigate the potential impacts of ultra-weak PPIs within dense protein suspensions. We find that ultra-weak PPIs can drive formation of transient clusters that last long enough to enable enzyme-catalyzed reactions and accelerate the sampling of protein associations. We apply our method to Mycoplasma genitalium, finding that ultra-weak PPIs should be ubiquitous among cytoplasmic proteins. We also predict that the proteome-wide interactome can be shifted to favor ‘binding-dominant’ ultra-weak PPIs via the introduction of a few charged protein complexes. We speculate that ultra-weak PPIs could contribute to cellular fitness by facilitating sampling and colloidal-scale transport of proteins involved in biological processes, including protein synthesis.
KINEMATICS OF CLASSICAL CEPHEIDS IN THE NUCLEAR STELLAR DISK

Classical Cepheids are useful tracers of the Galactic young stellar population because their distances and ages can be determined from their period–luminosity and period–age relations. In addition, the radial velocities and chemical abundance of the Cepheids can be derived from spectroscopic observations, providing further insights into the structure and evolution of the Galaxy. Here, we report the radial velocities of classical Cepheids near the Galactic center, three of which were reported in 2011 and a fourth being reported for the first time. The velocities of these Cepheids suggest that the stars orbit within the nuclear stellar disk, a group of stars and interstellar matter occupying a region of ∼200 pc around the center, although the three-dimensional velocities cannot be determined until the proper motions are known. According to our simulation, these four Cepheids formed within the nuclear stellar disk like younger stars and stellar clusters therein.
Business Performance Measurement

Business Performance Measurement (BPM) systems have grown in use and popularity over the past twenty years. Firms adopt BPM systems for a variety of reasons, but chiefly to improve control over the firm in ways that traditional accounting systems have not allowed. Several approaches, or frameworks, for building and managing BPM systems have evolved with the balanced scorecard as the dominant framework in use today. Despite the growing use of BPM systems in organizations of all kinds, significant problems cause firms to experience difficulty in implementing BPM systems. The problems range across a variety of topics: excessive diversity in the field of study, data quality and information system integration problems, lack of linkage to strategy, fundamental differences in how a strategy is formulated and executed in the firm, ill-defined metrics identification processes, high levels of change in BPM systems, analytical skills challenges, knowledge as a social and non-deterministic phenomenon, judgment and decision biases (from prospect theory literature) and organizational defenses that can undermine successful BPM systems use. To help address these problems, a set of critical success factors for BPM projects, derived from the literature, are identified. A minimal set of four criteria for designing successful BPM systems along with 12 BPM system factors to be considered when building BPM systems are discussed. Forty (40) software vendors with BPM related solutions are listed and the role of data visualization and metaphor is discussed as a potential means for addressing cognitive problems with BPM systems. Given the continual information processing and computing power improvements coupled with the advances in business strategy theory, analysis of decision-making, organizational learning and BPM systems overall, BPM systems are at a crossroads of difficult problems and interesting opportunities.
Probing the behaviour of the X‐ray binary Cygnus X‐3 with very long baseline radio interferometry

In order to test the recently proposed classification of the radio/X-ray states of the X-ray binary Cygnus X-3 (Cyg X-3), we present an analysis of the radio data available for the system at much higher spatial resolutions than used for defining the states. The radio data set consists of archival Very Long Baseline Array data at 5 or 15 GHz and new electronic European Very Long Baseline Interferometry Network data at 5 GHz. We also present 5-GHz Multi-Element Radio Linked Interferometer Network observations of an outburst of Cyg X-3. In the X-ray regime, we use quasi-simultaneous with radio, monitoring and pointed Rossi X-ray Timing Explorer observations. We find that when the radio emission from both jet and core is globally considered, the behaviour of Cyg X-3 at mas scales is consistent with that described at arcsec-scales. However, when the radio emission is disentangled in a core component and a jet component, the situation changes. It becomes clear that in active states the radio emission from the jet is dominating that from the core. This shows that in these states the overall radio flux cannot be used as a direct tracer of the accretion state.
The Combinations of White, Blue, and UV-A Light Provided by Supplementary Light-Emitting Diodes Promoted the Quality of Greenhouse-Grown Cucumber Seedlings

Insufficient solar light in winter inside the greenhouse may lead to a lower quality of vegetable seedlings, and supplemental light is an effective technique to solve this problem. This study evaluated the impacts of supplementary white (W)-light-emitting diodes (LEDs), ultraviolet A LEDs (UV-A), white and blue LEDs (WB), the combinations of white and UV-A LEDs (W-UVA), and white, blue, and UV-A LEDs (WB-UVA) on the leaf morphology, photosynthetic traits, biomass accumulation, root architecture, and hormone content of cucumber (Cucumis sativus L. cv. Tianjiao No. 5) seedlings grown in the greenhouse. The results indicated that supplementary LED lighting led to a decreased plant height, shorter hypocotyl length, bigger leaf area, and thicker leaf compared with those grown with solar light only, regardless of light quality. The shoot fresh weight, root fresh weight, and seedling quality index of cucumber seedlings grown under the combinations of white, blue, and UVA radiations increased by 30.8%, 3.2-fold, and 1.8-fold, respectively, compared with those grown with natural light only. However, no significant differences were exhibited in the biomass accumulation of greenhouse-grown cucumber seedlings between the control and the UVA treatment. The cellulose content and stem firmness of greenhouse-grown cucumber seedlings grown under the combinations of white, blue, and UVA radiations increased by 49.9% and 13.1%, respectively, compared with those grown under white light only. Additionally, the cytokinin content of cucumber seedlings was promoted by over 36.7% by applying supplementary light. In summary, the combinations of white, blue, and UVA radiations led to compact morphological characteristics, superior mechanical properties, and preferable growth performance, which could be applied as an available lighting strategy to obtain the desired morphological and quality properties of vegetable seedlings.
Platelet-Lymphocyte Ratio (PLR) in Post Renal Transplant Patients, Khartoum State, 2021

Background: Inflammation is important components of renal transplantation that responsible to cardiovascular mortality and morbidity. Platelet to lymphocyte ratio (PLR) was reported as inflammatory markers in various cardiac and non-cardiac diseases. We aimed to evaluate the value of PLR as inflammatory markers among renal transplant patients and. Methods: A comparative case-control study enrolled 100 subjects (50 renal transplant subjects and 50 normal individuals ) . Data on patient demographics and laboratory findings (lymphocyte, platelet, creatinine and eGFR) were recorded. Results: The mean ± SD of platelet-to-lymphocyte ratio (PLR) was higher in case group more than control group (128.4±66.5 vs 63.6±16.4; P. value= 0.000). Moreover, among renal transplant patients group, PLR showed significant positive correlation with creatinine levels (r= 0.370; P. value= 0.008) and negative correlation with GFR levels (r= - 0.678; P. value= 0.000). Conclusion: Kidney transplant patients had a higher PLR than healthy subjects, and PLR values and the development of graft function loss.
Direct-injection high-Tc dc-SQUID with an upper YBa2Cu3O7−x ground plane

We have fabricated direct-injection high-Tc superconducting quantum interference devices (SQUIDs) with integrated YBa2Cu3O7−x (YBCO) ground planes in the upper part of structure. The YBCO/PrBa2Cu3O7−x(PBCO)/YBCO edge junctions with 10-nm-thick PBCO barriers showed RSJ-like current-voltage (I–V) characteristics before and after the ground plane formation. We measured the voltage modulations of these SQUIDs with two different hole sizes to evaluate the line inductance. At a temperature of 30 K, the estimated line inductance under the ground plane was about 1.0 pH/□, while the estimated line inductance without the ground plane was 2.8 pH/□.
Polarizing Bubble Collisions

We predict the polarization of cosmic microwave background (CMB) photons that results from a cosmic bubble collision. The polarization is purely E-mode, symmetric around the axis pointing towards the collision bubble, and has several salient features in its radial dependence that can help distinguish it from a more conventional explanation for unusually cold or hot features in the CMB sky. The anomalous "cold spot" detected by the Wilkinson Microwave Anisotropy Probe (WMAP) satellite is a candidate for a feature produced by such a collision, and the Planck satellite and other proposed surveys will measure the polarization on it in the near future. The detection of such a collision would provide compelling evidence for the string theory landscape.
Magellan/MMIRS near-infrared multi-object spectroscopy of nebular emission from star-forming galaxies at 2 < z < 3

Aims. To investigate the ingredients, which allow star-forming galaxies to present Ly alpha line in emission, we studied the kinematics and gas phase metallicity of the interstellar medium. Methods. We used multi-object near-infrared spectroscopy with Magellan/MMIRS to study nebular emission from z similar or equal to 2-3 star-forming galaxies discovered in three MUSYC fields. Results. We detected emission lines from four active galactic nuclei and 13 high-redshift star-forming galaxies, including H alpha lines down to a flux of (4 +/- 1)E-17 erg s(-1) cm(-2). This yielded seven new redshifts. The most common emission line detected is [OIII]5007, which is sensitive to metallicity. We were able to measure metallicity (Z) for two galaxies and to set upper (lower) limits for another two (two). The metallicity values are consistent with 0.3 < Z/Z(circle dot) < 1.2, 12 + log (O/H) similar to 8.2-8.8. Comparing the Ly alpha central wavelength with the systemic redshift, we find Delta(vLy alpha-[OIII]5007) = 70 270 km s(-1). Conclusions. High-redshift star-forming galaxies, Ly alpha emitting (LAE) galaxies, and H alpha emitters appear to be located in the low mass, high star-formation rate (SFR) region of the SFR versus stellar mass diagram, confirming that they are experiencing burst episodes of star formation, which are building up their stellar mass. Their metallicities are consistent with the relation found for z <= 2.2 galaxies in the Z versus stellar mass plane. The measured Delta(vLy alpha[OIII]5007) values imply that outflows of material, driven by star formation, could be present in the z similar to 2 3 LAEs of our sample. Comparing with the literature, we note that galaxies with lower metallicity than ours are also characterized by similar Delta(vLy alpha[OIII]5007) velocity off sets. Strong F([OIII]5007) is detected in many Ly alpha emitters. Therefore, we propose the F(Ly alpha)/F([OIII]5007) flux ratio as a tool for the study of high-redshift galaxies; while influenced by metallicity, ionization, and Ly alpha radiative transfer in the ISM, it may be possible to calibrate this ratio to primarily trace one of these effects.
Prevalence and Pathogenicity of Aeromonas Species in Poultry

5(1): Abstract In this study 60 broiler chicken, 7 layer and 11 duck farms of different ages suffering from diarrhea and stunted growth were investigated for Aeromonas species, 9 broiler chicken farms yielded 14 Aeromonas isolates (7 A. caviae , 2 A. hydrophila , 3 A. schubertii and 2 A. trota ), 1 layer farm yielded only one A. trota isolate and 2 duck farms produced 2 A. hydrophila isolates. Bacteriological examination of ration and water samples of 50 poultry farms revealed A. caviae (3 isolates), A. hydrophila (8 isolates) from ration and A caviae (4 isolates), A. hydrophila (2 isolates) from water. The previ ous Aeromonas isolates from poultry farms were compared with standard A. hydrophila and A. hydrophila , A. schubertii of fish source when sensitivity, PCR identification and RFLP. Sensitivity test of poultry A. hydrophila was similar to that of standard but differed from that of the fish isolates, A. hydrophila isolates were more resistant to antibiotics than the other Aeromonas species
Response: Commentary: Strontium Is Released Rapidly From Agricultural Lime-Implications for Provenance and Migration Studies

Frei’s comment Frei (2021) argues that we selected an inappropriate mass balancing method in our paper (Andreasen and Thomsen, 2021), and that our conclusions therefore are unsupported. We maintain that our mass balance and our conclusions are sound. Our mass balance is based on well-constrained time series measurements of soil strontium content in 2014, measured just after the liming experiment in 2012–2013 and 5 years later in 2019. The field was fallow in the interim, with no anthropogenic addition of strontium and no removal through crop yield, providing an excellent opportunity to see how much of the strontium was left after 5 years. The results show that a significant amount of strontium (>3.9 g/m2) was lost from the soil, compared with the amount of strontium added during the liming experiment (3.6-4.8 g/m2) (Jessen et al., 2014), such that 80–100% of the strontium added during the liming experiment was leached from the soil over the next 5 years. By contrast, Frei’s comment Frei (2021) and Frei et al. (2020) present mass balances of the strontium inventory of the soil vs. the estimated total of added strontium over the period the soil has been farmed—∼100 years. The drawbacks of this approach are that accurate records of the timing and amount of added lime and fertilizer do not go back that far, and the amount of bioavailable strontium in the soil at the onset of farming is unknown.
STELLAR CLUSTERINGS AROUND “ISOLATED” MASSIVE YSOs IN THE LMC

Observations suggest that there is a significant fraction of O stars in the field of the Milky Way that appear to have formed in isolation or in low-mass clusters (<100 ). The existence of these high-mass stars that apparently formed in the field challenges the generally accepted paradigm, which requires star formation to occur in clustered environments. In order to understand the physical conditions for the formation of these stars, it is necessary to observe isolated high-mass stars while they are still forming. With the Hubble Space Telescope, we observe the seven most isolated massive (>8 ) young stellar objects (MYSOs) in the Large Magellanic Cloud. The observations show that while these MYSOs are remote from other MYSOs, OB associations, and even known giant molecular clouds, they are actually not isolated at all. Imaging reveals ∼100 to several hundred pre-main-sequence (PMS) stars in the vicinity of each MYSO. These previously undetected PMS stars form prominent compact clusters around the MYSOs, and in most cases they are also distributed sparsely across the observed regions. Contrary to what previous high-mass field star studies show, these observations suggest that high-mass stars may not be able to form in clusters with masses less than 100 . If these MYSOs are indeed the best candidates for isolated high-mass star formation, then the lack of isolation is at odds with random sampling of the initial mass function. Moreover, while isolated MYSOs may not exist, we find evidence that isolated clusters containing O stars can exist, which in itself is rare.
Influence of Acculturation in Yunnan’s Ethnic Minority College Students on Their Academic Achievement: The Moderating Role of Learning Motivation

: This study examined the effect of Yunnan’s ethnic minority college students’ acculturation on their academic achievement under the risk of the Matthew effect. Additionally, the role played by learning motivation in the relationship between ethnic minority college students’ acculturation and academic achievement was explored. A total of 403 valid questionnaires were collected from four areas in Yunnan province, China. Consequently, the Acculturation Scale, Academic Achievement Scale, and Learning Motivation Scale were used for measurement materials. These items of scales were evaluated on a five-point Likert scale ranging from 1 (strongly disagree) to 5 (strongly agree). SPSS (statistical package for the social sciences) and AMOS (analysis of a moment structures) softwares were used for data analyses. In addition, items were analyzed through item analysis, confirmatory factor analysis, reliability analysis and regression analysis. These results indicated that ethnic minority college students with low acculturation and learning motivation or high acculturation and low learning motivation can become objects of the Matthew effect. However, this study also observed that in certain students, high acculturation and high learning motivation can prevent the Matthew effect. Thus, high acculturation is crucial for improving academic achievement in ethnic minority college students. A level of high learning motivation is a powerful moderator promoting the academic achievement of students with high acculturation.
Cosmological implications from the full shape of the large-scale power spectrum of the SDSS DR7 luminous red galaxies

We obtain cosmological constraints from a measurement of the spherically averaged power spectrum of the distribution of about 90 000 luminous red galaxies (LRGs) across 7646 deg2 in the Northern Galactic Cap from the seventh data release (DR7) of the Sloan Digital Sky Survey. The errors and mode correlations are estimated thanks to the 160 LasDamas mock catalogues, created in order to simulate the same galaxies and to have the same selection as the data. We apply a model that can accurately describe the full shape of the power spectrum with the use of a small number of free parameters. Using the LRG power spectrum, in combination with the latest measurement of the temperature and polarization anisotropy in the cosmic microwave background (CMB), the luminosity–distance relation from the largest available Type 1a supernovae (SNIa) data set and a precise determination of the local Hubble parameter, we obtain cosmological constraints for five different parameter spaces. When all the four experiments are combined, the flat ΛCDM model is characterized by , Ωb= 0.045 ± 0.001, ns= 0.963 ± 0.011, σ8= 0.802 ± 0.021 and H0= 71.2 ± 1.4 km s−1 Mpc−1. When we consider curvature as a free parameter, we do not detect deviations from flatness: Ωk= (1.6 ± 5.4) × 10−3, when only CMB and the LRG power spectrum are used; the inclusion of the other two experiments does not improve this result substantially. We also test for possible deviations from the cosmological constant paradigm. Considering the dark energy equation of state parameter wDE as time independent, we measure , if the geometry is assumed to be flat, otherwise. When describing wDE through a simple linear function of the scale factor, our results do not evidence any time evolution. In the next few years new experiments will allow us to measure the clustering of galaxies with a precision much higher than achievable today. Models like the one used here will be a valuable tool in order to achieve the full potentials of the observations and obtain unbiased constraints on the cosmological parameters.
Recent Solar Magnetograph Results

This paper is a brief review of recent developments in magnetograph instrumentation, the problems of interpreting magnetograph measurements, and observations of the fine structure of the solar magnetic field. The improved spatial resolution of modern magnetographs has revealed that the magnetic field consists almost entirely of a fine structure which cannot yet be fully resolved. The measurements are as yet hard to interpret because of uncertain line profile changes in the small magnetic elements. Observations of the fine structure show slow changes which are not clearly associated with other forms of solar activity; the changes seem to be evolutionary. There is, at present, no observational support for the existence of a weak, global, solar magnetic field.