Miracle-dz/UniFAR-FTUs huggingface dataset:
The X-Ray Position and Infrared Counterpart of the Eclipsing X-Ray Pulsar OAO 1657–415

We have measured the precise position of the 38 s eclipsing X-ray pulsar OAO 1657-415 with the Chandra X-Ray Observatory: α (J2000) = 17h00m48. ˢ90, δ (J2000) = -41°39′21. ″6, error radius = 0. ″5. Based on the previously measured pulsar mass function and X-ray eclipse duration, this 10.4 day high-mass X-ray binary is believed to contain a B supergiant companion. Deep optical imaging of the field did not detect any stars at the Chandra source position, setting a limit of V > 23. However, near-infrared imaging revealed a relatively bright star (J = 14.1, H = 11.9, Ks = 10.7) coincident with the Chandra position, and we identify this star as the infrared counterpart of OAO 1657-415. The infrared colors and magnitudes and the optical nondetections for this star are all consistent with a highly reddened B supergiant (AV = 20.4 ± 1.3) at a distance of 6.4 ± 1.5 kpc. This implies an X-ray luminosity of 3 × 1036 ergs s-1 (2-10 keV). Infrared spectroscopy can verify the spectral type of the companion and measure its radial velocity curve, yielding a neutron star mass measurement.
A Large-scale Plume in an X-class Solar Flare

Ever-increasing multi-frequency imaging of solar observations suggests that solar flares often involve more than one magnetic fluxtube. Some of the fluxtubes are closed, while others can contain open fields. The relative proportion of nonthermal electrons among those distinct loops is highly important for understanding energy release, particle acceleration, and transport. The access of nonthermal electrons to the open field is also important because the open field facilitates the solar energetic particle (SEP) escape from the flaring site, and thus controls the SEP fluxes in the solar system, both directly and as seed particles for further acceleration. The large-scale fluxtubes are often filled with a tenuous plasma, which is difficult to detect in either EUV or X-ray wavelengths; however, they can dominate at low radio frequencies, where a modest component of nonthermal electrons can render the source optically thick and, thus, bright enough to be observed. Here we report the detection of a large-scale “plume” at the impulsive phase of an X-class solar flare, SOL2001-08-25T16:23, using multi-frequency radio data from Owens Valley Solar Array. To quantify the flare’s spatial structure, we employ 3D modeling utilizing force-free-field extrapolations from the line of sight SOHO/MDI magnetograms with our modeling tool GX_Simulator. We found that a significant fraction of the nonthermal electrons that accelerated at the flare site low in the corona escapes to the plume, which contains both closed and open fields. We propose that the proportion between the closed and open fields at the plume is what determines the SEP population escaping into interplanetary space.
Biodistribution and Toxicological Effects of Ultra-Small Pt Nanoparticles Deposited on Au Nanorods (Au@Pt NRs) in Mice with Intravenous Injection

Purpose Pt-based nanostructures are one of the promising nanomaterials for being used in catalysts, sensors, and therapeutics. However, their impacts on the health and biological systems are not adequately understood yet. Methods In this work, nanorods composed of ultrasmall platinum (Pt) nanoparticles deposited on the surface and gold nanorod as the core (Au@Pt NRs) were synthesized, and the distribution and toxic effects of Au@Pt NRs were investigated in C57BL/6 mice with intravenous injection by using atomic absorption spectroscopy (AAS), transmission electron microscope (TEM), hematoxylin-eosin (HE) staining and blood cell analyzer. Results At the time point of Day 1, Day 8 and Day 16 post injection of Au@Pt NRs (6 mg/kg of Pt atom), Au@Pt NRs were mainly accumulated in the liver and spleen. The energy dispersive spectrometer mapping images showed Au@Pt NRs experienced quick corrosion and Au released faster than Pt in the physiological environments. The catalase (CAT) activity in tissues increased slightly in the early stage of the Au@Pt NRs exposure and went down to the normal level. With HE staining, inflammatory cells infiltration could be seen in the tissues, while no significant influences were detected on the blood biochemistry and the function of liver and kidney. Conclusion In conclusion, intravenously injected Au@Pt NRs mainly distributed in the liver and spleen with comparable levels, and did not exert any significant toxic effects on the organs’ function within two weeks; meanwhile, Au@Pt NRs were able to degrade, which indicated acceptable safety to the mice and potentials of biomedical application.
BREEDING BEHAVIOUR, INDUCED BREEDING AND LARVAL REARING OF ILISH BATA, LABEO BATA (HAM.)

Breeding behaviour, induced breeding and larval rearing of a threatened species Labeo bata were conducted at the Government Fish Seed Multiplication Farm, Khulna Sadar, Khulna in July 2003. A number of distinctive measures viz., following, nudging, circling, pressing and breeding run were used to release gametes within four chambered nylon hapa placed in a concrete cistern. Breeding activity started 5:45-6:45 hrs after the second injection of PG to the females at 26-27 °C water temperature. The relatively sudden increase in female responsiveness and attractiveness to males appear to coincide with the occurrence of ovulation. Females participate in a number of breeding runs over a period of 1 hr, thereafter female activity decreases rapidly. To optimize the effective dose of breeding, the females were first injected at the rate of 0.5, 1.0, 1.5, 2.0 and 2.5 mg PG-kg body weight and the second injection at the rate of 3.0, 4.0, 5.0, 6.0 and 7.0 mg PG-kg body weight. Dose interval between first and second injection was 6 hrs. At the time of first dose to female, males were administered single constant dose of 1.5 mg PG-kg body weight. A total of five experiments were conducted in triplicates and each replication consisted of three males and two females. The best result in terms of breeding was observed at first dose of 1.5 mg PG-kg and second dose of 5.0 mg PG-kg body weight for the females. The fertilization and hatching rates with spawn production of the same dose (1.5+5.0 mg PG-kg body weight) were the best of 83.88±1.6 %, 80.67±7.8 % and 120 g respectively. All spawns were maintained in nursery ponds of 0.004 ha each with a suitable water condition. After 14 days of feeding only mustard oil cake at the rate of 250 g/0.004 ha, the obtained best result was an average length of 24.2 mm and weight of 87 mg with 63% survival for 35 g spawn. The growth and survival rates were inverse in relation to different stocking densities.
Association between Dietary Total Antioxidant Capacity of Antioxidant Vitamins and the Risk of Stroke among US Adults

The intake of antioxidant vitamins can scavenge free radicals and reduce oxidative stress, which may be beneficial for stroke. However, the relationship between total antioxidant capacity (TAC) of antioxidant vitamins and stroke is controversial. This study aims to investigate the association between dietary TAC and the risk of stroke in US adults. This study included participants over 20 years old from the 2001–2018 National Health and Nutrition Examination Survey (NHANES). Data from two 24 h dietary recalls were used to estimate the usual intake of antioxidant vitamins. TAC was calculated by the vitamin C equivalent antioxidant capacity reference values of individual antioxidant vitamins. Survey-weighted generalized linear models were performed to evaluate the relationship between TAC and the risk of stroke. A restricted cubic spline regression model was used to investigate the dose–response association. A total of 37,045 participants was involved, of whom 1391 suffered a stroke. Compared with the first tertile, the participants in the second tertile of TAC showed a lower risk of stroke (OR = 0.788, 95% CI: 0.662, 0.936) after adjusting for potential risk factors. The dose–response analysis showed a gradual increase in the risk of stroke as TAC decreases. Subgroups analyses indicated that this association was primarily in the population of those aged over 60 years old, who were female, consumed alcohol, were a former smoker and inactive. The sensitivity analysis presented consistent results. These results suggest that deficiency of dietary TAC was associated with an increased risk of stroke, particularly in populations with underlying oxidative stress injury.
A Machine Learning Approach for Detecting Rescue Requests from Social Media

Hurricane Harvey in 2017 marked an important transition where many disaster victims used social media rather than the overloaded 911 system to seek rescue. This article presents a machine-learning-based detector of rescue requests from Harvey-related Twitter messages, which differentiates itself from existing ones by accounting for the potential impacts of ZIP codes on both the preparation of training samples and the performance of different machine learning models. We investigate how the outcomes of our ZIP code filtering differ from those of a recent, comparable study in terms of generating training data for machine learning models. Following this, experiments are conducted to test how the existence of ZIP codes would affect the performance of machine learning models by simulating different percentages of ZIP-code-tagged positive samples. The findings show that (1) all machine learning classifiers except K-nearest neighbors and Naïve Bayes achieve state-of-the-art performance in detecting rescue requests from social media; (2) using ZIP code filtering could increase the effectiveness of gathering rescue requests for training machine learning models; (3) machine learning models are better able to identify rescue requests that are associated with ZIP codes. We thereby encourage every rescue-seeking victim to include ZIP codes when posting messages on social media. This study is a useful addition to the literature and can be helpful for first responders to rescue disaster victims more efficiently.
HST/WFC3 grism observations ofz∼ 1 clusters: the cluster versus field stellar mass–size relation and evidence for size growth of quiescent galaxies from minor mergers

Minor mergers are thought to be responsible for the size growth of quiescent field galaxies with decreasing redshift. We test this hypothesis using the cluster environment as a laboratory. Satellite galaxies in clusters move at high velocities, making mergers between them rare. The stellar mass-size relation in 10 clusters and in the field is measured and compared at z similar to 1. Our cluster sample contains 344 spectroscopically confirmed cluster members with Gemini/Gemini Multi-Object Spectrographs and 182 confirmed with Hubble Space Telescope/Wide Field Camera 3 G141 grism spectroscopy. On average, quiescent and star-forming cluster galaxies are smaller than their field counterparts by (0.08 +/- 0.04) and (0.07 +/- 0.01) dex, respectively. These size offsets are consistent with the average sizes of quiescent and star-forming field galaxies between 1.2 <= z <= 1.5, implying the cluster environment has inhibited size growth between this period and z similar to 1. The negligible differences measured between the z similar to 0 field and cluster quiescent mass-size relations in other works imply that the average size of quiescent cluster galaxies must rise with decreasing redshift. Using a toy model, we show that the disappearance of the compact cluster galaxies might be explained if, on average, similar to 40 per cent of them merge with their brightest cluster galaxies (BCGs) and similar to 60 per cent are tidally destroyed into the intracluster light (ICL) between 0 <= z <= 1. This is in agreement with the observed stellar mass growth of BCGs between 0 <= z <= 1 and the observed ICL stellar mass fraction at z similar to 0. Our results support minor mergers as the cause for the size growth in quiescent field galaxies, with cluster-specific processes responsible for the similarity between the field and cluster quiescent mass-size relations at low redshift.
Strong coupling analysis of QED$_3$ for excitation spectrum broadening in undoped high-temperature superconductor

Theory of quantum electrodynamics in three spatial-time dimension is applied to the two-dimensional $S=1/2$ quantum Heisenberg antiferromagnet in order to investigate a doped hole in high-temperature superconductors. Strong coupling analysis of the U(1) gauge field interaction is carried out to describe spectral broadening observed in the undoped compounds. It is found that the fermionic quasiparticle spectrum is of Gaussian form with the width about 3J, with J being the superexchange interaction energy. The energy shift of the spectrum is on the order of the quasiparticle band width, which suggests that the system is in the strong coupling regime with respect to the gauge field interaction describing the phase fluctuations about the staggered flux state.
Galaxy structure with strong gravitational lensing: decomposing the internal mass distribution of massive elliptical galaxies

We investigate how strong gravitational lensing can test contemporary models of massive elliptical (ME) galaxy formation, by combining a traditional decomposition of their visible stellar distribution with a lensing analysis of their mass distribution. As a proof of concept, we study a sample of three ME lenses, observing that all are composed of two distinct baryonic structures, a ‘red’ central bulge surrounded by an extended envelope of stellar material. Whilst these two components look photometrically similar, their distinct lensing effects permit a clean decomposition of their mass structure. This allows us to infer two key pieces of information about each lens galaxy: (i) the stellar mass distribution (without invoking stellar populations models) and (ii) the inner dark matter halo mass. We argue that these two measurements are crucial to testing models of ME formation, as the stellar mass profile provides a diagnostic of baryonic accretion and feedback whilst the dark matter mass places each galaxy in the context of LCDM large scale structure formation. We also detect large rotational offsets between the two stellar components and a lopsidedness in their outer mass distributions, which hold further information on the evolution of each ME. Finally, we discuss how this approach can be extended to galaxies of all Hubble types and what implication our results have for studies of strong gravitational lensing.
The fourth Uhuru catalog of X-ray sources.

Positions and intensities are presented for 339 X-ray sources observed by the Uhuru (SAS A) X-ray satellite observatory. We find good agreement between the sources in this catalog and those in the 3U and 2A catalogs. Optical and radio counterparts are suggested based on positional coincidence. The major classes of identified objects include binary stellar systems, supernova remnants, Seyfert galaxies, clusters of galaxies, and posibly the new class of superclusters of galaxies.
Experimental Study of the Particles Influence on the Pyramid Wake within the Turbulent Boundary Layer

Particle imaging velocimetry (PIV) was used to study the near-field variation of a pyramid rough element in clear water and a liquid–solid boundary layer (thickness: 60 mm). Particles with an average diameter of 355 µm and Stokes number of 4.3 were injected into a 1:1000 mass ratio (solid particles: water) liquid–solid two-phase solution. Experiments were conducted to collect instantaneous velocity field information in the streamwise–normal direction and streamwise–spanwise direction at a Reynolds number of 8350. Then, the average velocity field and turbulence intensity of the rough element wake under single-phase and two-phase conditions were compared, and the morphology and periodicity of the shedding structure were analyzed by using proper orthogonal decomposition (POD) combined with the power spectral density function (PSD). Particles were shown to have no significant impact on the recirculation area in the streamwise–spanwise plane but did result in a reduction of the recirculation zone in the streamwise–normal plane and a 0.2h closer location of the streamline's origin to the obstacle. Along with the weakening of the upwash structure, the particle phase diminishes the velocity gradient along the span direction and turbulence intensity. Structural shedding at the top of the pyramid and near the wall occurred simultaneously, and the same shedding period was maintained. Particularly, in the first two POD modes, the energy of the shedding structure near the wall was higher than that at the obstacle tip, with a maximum energy differential of approximately 6%. The Strouhal number of the shedding structure decreased by particles from 0.217 to 0.209. The concentration distribution and degree of dispersion in the particle-laden flow illustrate different results, with lower statistics in the wake flow field.
Maximal qubit violation of n-locality inequalities in a star-shaped quantum network

Bell's theorem was a cornerstone for our understanding of quantum theory and the establishment of Bell non-locality played a crucial role in the development of quantum information. Recently, its extension to complex networks has been attracting growing attention, but a deep characterization of quantum behavior is still missing for this novel context. In this work we analyze quantum correlations arising in the bilocality scenario, that is a tripartite quantum network where the correlations between the parties are mediated by two independent sources of states. First, we prove that non-bilocal correlations witnessed through a Bell-state measurement in the central node of the network form a subset of those obtainable by means of a local projective measurement. This leads us to derive the maximal violation of the bilocality inequality that can be achieved by arbitrary two-qubit quantum states and arbitrary local projective measurements. We then analyze in details the relation between the violation of the bilocality inequality and the CHSH inequality. Finally, we show how our method can be extended to the n-locality scenario consisting of n two-qubit quantum states distributed among n + 1 nodes of a star-shaped network.
Goal clarity on the relationship between government ownership and financial performance of the listed companies in Kenya and Tanzania

Abstract This study investigates the moderating effect of company goal clarity on the relationship between government ownership and financial performance of the listed companies in Kenya and Tanzania. The results show that government ownership holds an average of 6% of the ownership stakes and a maximum of 74% in the selected listed companies. Furthermore, it is found that, listed companies that engage in goal-setting, pursue an average of 5 company goals concurrently, and a maximum of 13. Moreover, government ownership is found to be negatively related to financial performance, while a decrease in company goal clarity is both positively and negatively related to financial performance, for the Tobin’s q and the risk-adjusted ROA models, respectively. The implication is that, as government ownership in emerging economies is endowed with relatively more skills and resources compared to other owners in listed companies, it can effectively pursue a relatively higher number of company goals. The results also suggest that a decrease in goal clarity has a negative moderating effect on the relationship between government ownership and financial performance, whereby the moderating effect reduces the magnitude of the negative effects of government ownership on financial performance, up to an optimal point of seven company goals. The decrease of company goal clarity, which mainly emanates from the concurrent pursuit of all company goals plus the social welfare ones, reduces the negative effects of the ownership on financial performances, contrary to the assertions made in the goal-setting theory.
Antitumor Activity of Simvastatin in Preclinical Models of Mantle Cell Lymphoma

Simple Summary Mantle cell lymphoma (MCL) is an aggressive subtype of B-cell non-Hodgkin lymphoma that remains incurable with standard therapy. A promising approach to overcome the low life expectancy of patients with MCL is drug repurposing, a strategy focused on finding novel therapeutic weapons in approved drugs. Statins are well-tolerated, inexpensive, and widely prescribed as cholesterol-lowering agents that have also shown anti-cancer activity. The present study aimed to elucidate the effect of simvastatin on MCL cells. Our preclinical data demonstrate for the first time that simvastatin treatment impairs MCL proliferation and triggers a caspase-independent, ROS-mediated death of MCL cultures. Furthermore, we show that simvastatin significantly inhibits MCL migration and invasion ability, thereby impairing the growth of MCL tumors, suggesting that the use of statins might be considered for repurpose as a precise MCL therapy. Abstract Background: Mantle cell lymphoma (MCL) is a rare and aggressive subtype of B-cell non-Hodgkin lymphoma that remains incurable with standard therapy. Statins are well-tolerated, inexpensive, and widely prescribed as cholesterol-lowering agents to treat hyperlipidemia and to prevent cardiovascular diseases through the blockage of the mevalonate metabolic pathway. These drugs have also shown promising anti-cancer activity through pleiotropic effects including the induction of lymphoma cell death. However, their potential use as anti-MCL agents has not been evaluated so far. Aim: The present study aimed to investigate the activity of simvastatin on MCL cells. Methods: We evaluated the cytotoxicity of simvastatin in MCL cell lines by CellTiter-Glo and lactate dehydrogenase (LDH) release assays. Cell proliferation and mitotic index were assessed by direct cell recounting and histone H3-pSer10 immunostaining. Apoptosis induction and reactive oxygen species (ROS) generation were evaluated by flow cytometry. Cell migration and invasion properties were determined by transwell assay. The antitumoral effect of simvastatin in vivo was evaluated in a chick embryo chorioallantoic membrane (CAM) MCL xenograft model. Results: We show that treatment with simvastatin induced a 2 to 6-fold LDH release, inhibited more than 50% of cell proliferation, and enhanced the caspase-independent ROS-mediated death of MCL cells. The effective impairment of MCL cell survival was accompanied by the inhibition of AKT and mTOR phosphorylation. Moreover, simvastatin strongly decreased MCL cell migration and invasion ability, leading to a 55% tumor growth inhibition and a consistent diminution of bone marrow and spleen metastasis in vivo. Conclusion: Altogether, these data provide the first preclinical insight into the effect of simvastatin against MCL cells, suggesting that this agent might be considered for repurpose as a precise MCL therapy.
Extinction risk of Chinese angiosperms varies between woody and herbaceous species

Understanding how species' traits and environmental contexts relate to extinction risk is a critical priority for ecology and conservation biology. This study aims to identify and explore factors related to extinction risk between herbaceous and woody angiosperms to facilitate more effective conservation and management strategies and understand the interactions between environmental threats and species' traits.