Miracle-dz/UniFAR-FTUs huggingface dataset:
Teaching Vietnamese Writing to Foreigners With Interactive Viewpoints

Interactive communication is a key feature of the information age. Forms of communication that were thought to be one-way, such as television and book, becoming interactive along with the growth of digital, mobile devices, Internet, computers. Developed technology and updated media have created more chances for interactive communication throughout social classes, media, disciplines, cultures, places and also times. Pedagogically, writing has been increasingly perceived as inherently social and interactive. It involves more than just creating, organizing, translating ideas into texts. Basically, each act of writing is an interactive phase, ideally manifesting as intertextuality, with a particular academic establishment or discipline represented by its specific foundations, problems, and precursors. For those motivations, we have researched the application of interactive viewpoints into teaching Vietnamese writing for foreign students. Within this, we clarify the concept of interactive writing, propose techniques for teaching, criteria for assessing the interactive Vietnamese writing skills of foreign students, to apply in the teaching process and in testing and assessing activities. The results also have the prospects for developing interactive Vietnamese writing textbooks for foreigners as well as criteria for assessing the interactive Vietnamese writing competency tests.
Exploring University Students' Engagement with Online Video Lectures in a Blended Introductory Mechanics Course

The advent of MOOCs has stimulated interest in using online videos to deliver content in university courses. We examined student engagement with 78 online videos that we created and were incorporated into a one-semester blended introductory mechanics course at the Georgia Institute of Technology. We found that students were more engaged with videos that supported laboratory activities than with videos that presented lecture content. In particular, the percentage of students accessing laboratory videos was consistently greater than 80 percent throughout the semester while the percentage of students accessing lecture videos dropped to less than 40 percent by the end of the term. Moreover, students were more likely to access the entirety of a laboratory video than a lecture video. Our results suggest that students may access videos based on perceived value: students appear to consider the laboratory videos as essential for successfully completing the laboratories while students appear to consider the lecture videos as something more akin to supplementary material. We found there was little correlation between student engagement with the videos and the performance in the course. In addition, an examination of the in-video content suggests that students focus more on concrete information that is explicitly required for assignment completion (e.g., actions required to complete laboratory work, or formulas/mathematical expressions needed to solve particular problems) and less on content that is considered more conceptual in nature. The results of the study suggest ways in which instructors may revise courses to better support student learning.
The planetary nebula nature and properties of IRAS 18197−1118

IRAS18197-1118 is a stellar-like object that has been classified as a planetary nebula from its radio continuum emission and high [SIII]9532 to Paschen9 line intensity ratio, as derived from direct images. We present intermediate- and high-resolution, optical spectroscopy, VLA 8.46 GHz radio continuum data, and narrow-band optical images of IRAS18197-1118 aimed at confirming its planetary nebula nature, and analyzing its properties. The optical spectrum shows that IRAS18197-1118 is a medium-excitation planetary nebula suffering a high extinction (c(H_beta) ~3.37). The optical images do not resolve the object but the 8.46 GHz image reveals an elliptical shell of ~2.7x1. 6 arcsec^2 in size, a compact central nebular region, and possible bipolar jet-like features, indicating several ejection events. The existence of a compact central nebula makes IRAS18197-1118 singular because this kind of structure is observed in a few PNe only. An expansion velocity ~20 km/s and a systemic velocity (LSR) ~+95 km/s are obtained for the object. An electron density of ~3.4x10^4 cm-3 and an ionized mass of ~2.1x10^-2 M_sun are deduced from the 8.46 GHz radio continuum data for an estimated statistical distance of 6 kpc. Helium abundance is high but nitrogen is not enriched, which is not consistently reproduced by evolutionary models, suggesting different abundances in the elliptical shell and central region. The properties of IRAS18197-1118 indicate a relatively young planetary nebula, favor a distance of >~6 kpc, and strongly suggest that it is an inner-disc planetary nebula.
High Dimensional Low Rank and Sparse Covariance Matrix Estimation via Convex Minimization

This paper introduces a general framework of covariance structures that can be verified in many popular statistical models, such as factor and random effect models. The new structure is a summation of low rank and sparse matrices. We propose a LOw Rank and sparsE Covariance estimator (LOREC) to exploit this general structure in the high-dimensional setting. Analysis of this estimator shows that it recovers exactly the rank and support of the two components respectively. Convergence rates under various norms are also presented. The estimator is computed efficiently using convex optimization. We propose an iterative algorithm, based on Nesterov’s method, to solve the optimization criterion. The algorithm is shown to produce a solution within O(t −2 ) of the optimal, after any finite t iterations. Numerical performance is illustrated using simulated data and stock portfolio selection on S&P 100.
BENCHMARKING FAST-TO-ALFVÉN MODE CONVERSION IN A COLD MAGNETOHYDRODYNAMIC PLASMA

Alfvén waves may be generated via mode conversion from fast magnetoacoustic waves near their reflection level in the solar atmosphere, with implications both for coronal oscillations and for active region helioseismology. In active regions this reflection typically occurs high enough that the Alfvén speed a greatly exceeds the sound speed c, well above the a = c level where the fast and slow modes interact. In order to focus on the fundamental characteristics of fast/Alfvén conversion, stripped of unnecessary detail, it is therefore useful to freeze out the slow mode by adopting the gravitationally stratified cold magnetohydrodynamic model c → 0. This provides a benchmark for fast-to-Alfvén mode conversion in more complex atmospheres. Assuming a uniform inclined magnetic field and an exponential Alfvén speed profile with density scale height h, the Alfvén conversion coefficient depends on three variables only: the dimensionless transverse-to-the-stratification wavenumber κ = kh, the magnetic field inclination from the stratification direction θ, and the polarization angle ϕ of the wavevector relative to the plane containing the stratification and magnetic field directions. We present an extensive exploration of mode conversion in this parameter space and conclude that near-total conversion to outward-propagating Alfvén waves typically occurs for small θ and large ϕ (80°–90°), though it is absent entirely when θ is exactly zero (vertical field). For wavenumbers of helioseismic interest, the conversion region is broad enough to encompass the whole chromosphere.
Microscopic and ELISA Based Detection of Toxoplasma and its Associated Risk Factors in Pregnant Women of District Mardan

Toxoplasmosis caused by the protozoan parasite Toxoplasma gondii, the most prevalent disease worldwide. The infections in human are extremely dangerous if they happen during pregnancy because they may lead to miscarriage or congenital abnormalities, which predominantly affect the central nervous system. The main objective of current study was to identify the risk factors for toxoplasmosis and its prevalence among pregnant women in Mardan. The blood serum was tested using the ELISA and the latex agglutination test. Through interviews, sociodemographic and prospective risk factor data were gathered using a standardized questionnaire. Our findings, obtained from ELISA and latex agglutination tests, showed considerably higher toxoplasmosis rates of 23% and 11%, respectively. The geographic distribution of toxoplasma infection in district Mardan revealed a high prevalence in Shah Baig village through ELISA (28%) and latex test (12%) followed by Ibrahim Khan Killi (24%) and (16%), while lower cases were recorded through ELISA (20%) in Sheikh Yousaf Killi and Saleem Khan Killi. Compared to working women in the community (5.85 percent), the infection was more prevalent (18%) in non-occupational women/house wives. Moreover, it was also observed that abortion occurred to the woman who have been clinically diagnosed positive by ELISA and it reported 20% by ELISA and 11.4% by latex agglutination test. It was concluded that T. gondii infection were more prevalent in pregnant women of rural areas of Mardan as compared to the urban centers. Women and children were more vulnerable if they frequently interact with domestic animals and play in contaminated environment.
Hamiltonian form of topologically massive supergravity

We construct a “Chern-Simons-like” action for N = 1 Topologically Massive Supergravity from the Chern-Simons actions of N = 1 Supergravity and Conformal Supergravity. We convert this action into Hamiltonian form and use this to demonstrate that the theory propagates a single massive 2, 3 � supermultiplet.
Challenges and Solutions of Syrian Refugee Children in the Process of Acquiring Basic Language Skills

The aim of this study is to determine the problems experienced by Syrian refugee children in the 1st grade primary school in the process of acquiring basic Turkish language skills (listening, speaking, reading and writing) and the solutions to these problems according to the views of teachers, parents and students. Since the most Syrian refugees in the world are in Turkey, this study was based on basic language skills in Turkish. This research was designed as a survey model. The study group of the research consists of 126 classroom teachers, 15 parents and 15 students. In the research, criterion sampling method was used to determine the participants to be surveyed, and snowball sampling method was used to determine the participants to be interviewed. The research data were collected with the data collection tool titled "Teachers' Opinions on Basic Language Skills" developed by the researcher and a semi-structured interview form. Frequency (f) and percentages (%) were used in the analysis of quantitative data, and descriptive analysis technique was used in the analysis of qualitative data. It has been concluded that Syrian refugee children have problems in describing the text they listen to determining the subject of what they listen, and answering questions about what they listen. In the study, it was determined that Syrian refugee children had severe problems related to the acquisition and use of basic Turkish language skills. It has been concluded that these children can be solved by providing basic Turkish language skills with contemporary approaches, methods and techniques enriched with appropriate materials and supported by technology and cultural elements.
Reliability of the Pediatric Specific Musculoskeletal Ultrasound Scoring Systems for the Elbow, Wrist, and Finger Joints

Objective Musculoskeletal ultrasound (MSUS) is increasingly being used in the evaluation of pediatric musculoskeletal diseases. In order to provide objective assessments of arthritis, reliable MSUS scoring systems are needed. Recently, joint-specific scoring systems for arthritis of the pediatric elbow, wrist, and finger joints were proposed by the Childhood Arthritis and Rheumatology Research Alliance (CARRA) MSUS workgroup. This study aimed to assess the reliability of these scoring systems when used by sonographers with different levels of expertise. Methods Members of the CARRA MSUS workgroup attended training sessions for scoring the elbow, wrist, and finger. Subsequently, scoring exercises of B mode and power Doppler (PD) mode still images for each joint were performed. Interreader reliability was determined using 2-way single-score intraclass correlation coefficients (ICCs) for synovitis and Cohen for tenosynovitis. Results Seventeen pediatric rheumatologists with different levels of MSUS expertise (1-15 yrs) completed a 2-hour training session and calibration exercise for each joint. Excellent reliability (ICC > 0.75) was found after the first scoring exercise for all the finger and elbow views evaluated on B mode and PD mode, and for all of the wrist views on B mode. After a second training session and a scoring exercise, the wrist PD mode views reached excellent reliability as well. Conclusion The preliminary CARRA MSUS scoring systems for assessing arthritis of the pediatric elbow, wrist, and finger joints demonstrate excellent reliability among pediatric MSUS sonographers with different levels of expertise. With further validation, this reliable joint-specific scoring system could serve as a clinical tool and scientific outcome measure.
OPTICAL POLARIMETRY OF THE BLAZAR CGRaBS J0211+1051 FROM MOUNT ABU INFRARED OBSERVATORY

We report the detection of high polarization in the first detailed optical linear polarization measurements on the BL Lac object CGRaBS J0211+1051, which flared in γ-rays on 2011 January 23 as reported by Fermi. The observations were made during 2011 January 30–February 3 using a photo-polarimeter mounted at the 1.2 m telescope of Mount Abu Infrared Observatory. CGRaBS J0211+1051 was detected to have a ∼21.05% ± 0.41% degree of polarization (DP) with a steady position angle (P.A.) at 43° on 2011 January 30. During January 31 and February 1, while polarization shows some variation, the P.A. remained steady through the night. Several polarization flashes occurred during February 2 and 3 resulting in changes in the DP by more than 4% at short timescales (∼17–45 minutes). The intra-night variability shown by the source appears to be related to the turbulence in the relativistic jet. A mild wavelength dependence of polarization is not ruled out during the nights of February 2 and 3. The source exhibited significant inter-night variations in the DP (changing by about 2%–9%) and P.A. (changing by 2°–22°) during the five nights of observations. A sudden change in the P.A. accompanied by a rise in the DP could be indicative of the fresh injection of plasma in the jet. The detection of a high and variable DP suggests that the source is a low-energy peaked blazar.
Quenching nitrogen–vacancy center photoluminescence with an infrared pulsed laser

Diamond nanocrystals containing nitrogen–vacancy (NV) color centers have been used in recent years as fluorescent probes for near-field and cellular imaging. In this work, we report that an infrared (IR) pulsed excitation beam can quench the photoluminescence of a NV color center in a diamond nanocrystal (size <50 nm) with an extinction ratio as high as ≈90%. We attribute this effect to the heating of the nanocrystal consecutive to multi-photon absorption by the diamond matrix. This quenching is reversible: the photoluminescence intensity goes back to its original value when the IR laser beam is turned off, with a typical response time of 100 ps, allowing for fast control of NV color center photoluminescence. We used this effect to achieve the sub-diffraction-limited imaging of fluorescent diamond nanocrystals on a coverglass. For that, as in the ground state depletion super-resolution technique, we combined the green excitation laser beam with the control IR depleting one after shaping its intensity profile in a doughnut form, so that the emission comes only from the sub-wavelength size central part.
Modeling statistical properties of the X-ray emission from aged pulsar wind nebulae

The number of known pulsar wind nebulae (PWNe) has recently increased considerably, and the majority of them are now middle-age objects. Recent studies have shown a clear correlation of both X-ray luminosity and size with the PWN age, but fail in providing a thorough explanation of the observed trends. Here I propose a different approach to these effects, based on the hypothesis that the observed trends do not simply reproduce the evolution of a “typical” PWN, but are a combined effect of PWNe evolving under different ambient conditions, the leading parameter being the ambient medium density. Using a simple analytic approach, I show that most middle-aged PWNe are more likely observable during the reverberation phase, and I succeed in reproducing trends consistent with those observed, provided that the evolution of the X-ray emitting electrons remains adiabatic over the whole reverberation phase. As a direct consequence, I show that the X-ray spectra of older PWNe should be harder, also consistent with observations. (© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Quintom scalar field : Varying dark energy equation of state obtained from recent SNe Ia, BAO and OHD data

From the analysis of Supernova Ia data alongwith Observational Hubble Data (OHD) and Baryon Acoustic Oscillation (BAO) data, we attempt to find out the nature of a scalar potential that may be responsible for the Dark Energy of the universe. We demonstrate that in order to explain the varying dark energy equation of state ($\omega_X(z)$) as obtained in a model independent way from the analyses of observational data, we need to invoke a quintom scalar field having a "quintessence" part for $\omega_X(z) > -1$ and a "phantom" part for $\omega_X(z) < -1$. We consider a Gaussian type potential for these scalar fields and compare the dark energy equation of state derived from such potential with the one computed from the data analysis.
Dispersal without drivers: Intrinsic and extrinsic variables have no impact on movement distances in a terrestrial amphibian

Abstract Dispersive movements are often thought to be multicausal and driven by individual body size, sex, conspecific density, environmental variation, personality, and/or other variables. Yet such variables often do not account for most of the variation among dispersive movements in nature, leaving open the possibility that dispersion may be indeterministic. We assessed the amount of variation in 24 h movement distances that could be accounted for by potential drivers of displacement with a large empirical dataset of movement distances performed by Fowler's Toads (Anaxyrus fowleri) on the northern shore of Lake Erie at Long Point, Ontario (2002–2021, incl.). These toads are easy to sample repeatedly, can be identified individually and move parallel to the shoreline as they forage at night, potentially dispersing to new refuge sites. Using a linear mixed‐effect model that incorporated random effect terms to account for sampling variance and inter‐annual variation, we found that all potential intrinsic and extrinsic drivers of movement accounted for virtually none of the variation observed among 24 h distances moved by these animals, whether over short or large spatial scales. We examined the idea of movement personality by testing variance per individual toad and found no evidence of individuality in movement distances. We conclude that deterministic variables, whether intrinsic or extrinsic, neither can be shown to nor are necessary to drive movements in this population over all spatial scales. Stochastic, short time‐scale movements, such as daily foraging movements, can instead accumulate over time to produce large spatial‐scale movements that are dispersive in nature.
Construction of the Conserved Non-linear Zeta via the Effective Action for Perfect Fluids

We consider the problem of how to construct the curvature perturbation $\zeta$ to nonlinear levels, which is expected to evolve time independently on super-horizon scales; in particular we concentrate on the situation where the universe is dominated by a perfect fluid. We have used a low energy/long wavelength effective action to model the fluid sector. Different from previous work, our approach assumes neither the absence of vector and tensor perturbations nor ``local homogeneity and isotropy''. As a corollary, we also show that the nonlinearly defined graviton field $\gamma_{ij}$ is conserved outside the horizon in the same manner as $\zeta$ is.
Left Atrial Remodeling and short-Term Outcome in Patients Presenting with Non- ST Segment Elevation Myocardial Infarction

Background: Non–ST elevation myocardial infarction (NSTEMI) is an acute ischemic event causing cardiomyocyte death by necrosis in a clinical setting consistent with acute myocardial ischemia. Objective: The aim of the current study was to clarify relationship between left atrial remodeling especially LAVI and short term clinical outcome in patients with acute NSTEMI. Patients and methods : We conducted this study on 110 non-STEMI patients who were referred to Cardiology Department, Faculty of Medicine, Zagazig University. Echo was performed within 48 hours of non-STEMI and 3 months later. Data were collected and analyzed and patients were divided into 2 groups according to left atrial volume index (LAVI) after 3 months of non-STEMI using cut-off point 34 mL/m 2 . Results: Ejection fraction after 3 months was lower among malone ante grade continence enema (MACE) group with statistically significant difference (p=0.023). Left atrial volume and left atrial volume index were higher among MACE group with statistically significant differences (p=0.0001; 0.0001). Percent of patients with LAVI>34 was higher among MACE group with statistically significant difference (p= 0.0008). Conclusion: left atrial volume index is a good predictor for incidence of major adverse cardiac events after non-STEMI especially heart failure and angina. At cutoff value equal to 34.2, LAVI exhibited 95.2% sensitivity and 83.2% specificity in predicting incidence of MACE. Determinants of LAVI was baseline left atrial volume, E/A ratio, lesions in left anterior descending and left circumflex artery and ejection fraction after 3 months of non STEMI.
Therapeutic Potential of Adipose-Derived Mesenchymal Stem Cells (ADMSCs) with/without Taurine in Aluminum Chloride-Induced Alzheimer's Disease Rat Model

Alzheimer's (AD) of characterized by its progression, neurobehavioral and neuro-pathological characteristics. Adipose-derived mesenchymal stem cells (ADMSCs) have previously proved a potential role in preventing the pathogenesis of several neurodegenerative disorders, so it is regarded as a promising new approach for AD regenerative therapy. Taurine was found to enhance stem cell activation and propagation, yielding a higher concentration of neural progenitors and stem cells, and reducing the number of activated microglia leading to down-regulated inflammation in vitro . The present study aimed to investigate the possible therapeutic potential of ADMSCs with/without taurine in treating the AD rat model. It was planned to include three successive phases: induction, withdrawal, and therapeutic phases. Fifty male Wistar rats were divided into two main groups: control (C) and AD model. Behavioral changes, as manifested by the T-maze experiment, had been recorded. β - amyloid levels had been measured in brain homogenate and serum by ELISA. Oxidative stress marker (MDA), brain and serum antioxidant enzyme activities (SOD, GSH, and CAT) as well serum acetylcholine esterase activity were spectrophotometrically determined. Pro-apoptotic (p53 and Bax) and anti-apoptotic (Bcl2) gene expression in the brain were evaluated using RT-qPCR. The histopathological alterations in brain tissues were also observed.