Miracle-dz/UniFAR-FTUs huggingface dataset:
Determinants of Foreign Investors’ Home Bias in the Vietnamese Stock Market

This paper studies the determinants of foreign investors’ home bias in the Vietnamese stock market. The research used a database on foreign ownership and the characteristics of 4698 enterprises listed on the Ho Chi Minh Stock Exchange (HOSE) and Hanoi Stock Exchange (HNX) over a 10-year period. A multivariate regression model was constructed using two methods: (i) cross-sectional regressions by year, and (ii) panel data regressions to evaluate the relationship between firm characteristics representing barriers to foreign portfolio investment (FPI) and foreign investors’ home bias in the Vietnamese stock market. The results revealed the impact of firm characteristics representing FPI barriers on the home bias of foreign investors in the Vietnamese stock market – i.e., which business characteristics are preferred by foreign investors when choosing investment portfolios – as well as the impact of FPI barriers on the portfolio selection of foreign investors on the Vietnamese stock market. The research results can be used to identify why foreign investors prefer certain firms in their investment portfolios in order to enhance the attraction of FPI capital, for which the most radical solution is to solve the problem of the investment barriers hidden behind firm characteristics.
Quantitative Estimation: One, Two, or Three Abilities?

The mathematics education literature refers to 3 types of quantitative estimation skill: numerosity, measurement, and computational estimation. The psychometric literature includes a confusing array of tests intended to define quantitative estimation. This study examined relations among tests for numerosity, measurement, and computational estimation, and recognized tests for numerical facility and quantitative reasoning using principal components analysis. 2 components were identified. The first component aligned computational estimation with numerical facility and general quantitative reasoning. The second component included the tests of numerosity and measurement estimation. It was suggested that this second component might be related to spatial ability. Implications for mathematics education and assessment are discussed.
Fermi Surface of LaSb and LaBi

The de Haas-van Alphen effect of the semimetallic lanthanum pnictides LaSb and LaBi, which have attracted interest as a proper reference material for a study of anomalous physical properties observed in the Ce pnictides, is explained by the Fermi surface which is calculated by a relativistic APW method with the local-density approximation. The Fermi surface of both pnictides consists of two small hole sheets centred at \(\varGamma\) and three equivalent electron pockets centred at X. Calculated extremal cross-sectional area and cyclotron mass agree reasonably well with experimental results.
BACH1 regulates erythrophagocytosis and iron‐recycling in β‐thalassemia

Macrophages play essential roles in erythrophagocytosis and iron recycling. β‐thalassemia is characterized by a genetic defect in hemoglobin synthesis, which increases the rate of iron recycling. We previously showed that reduced expression of the BTB and CNC homolog 1 (BACH1) gene leads to increased phagocytosis of abnormal RBCs by activated monocytes. However, the mechanisms underlying this abnormal RBC clearance remained unclear. Herein, the spleen and bone marrow cells of β‐thalassemic mice were examined for erythrophagocytosis CD markers and iron‐recycling genes. Higher expression levels of CD47 and CD163 on RBCs and macrophages, respectively, were observed in β‐thalassemic mice than in wild‐type cells. The decreased expression of BACH1 caused an increase in Nrf2, Spic, Slc40a1, and HMOX1 expression in splenic red pulp macrophages of thalassemic mice. To investigate BACH1 regulation, a macrophage cell line was transfected with BACH1‐siRNA. Decreased BACH1 expression caused an increase in CD163 expression; however, the expression levels were lower when the cells were cultured in media supplemented with β‐thalassemia/HbE patient plasma. Additionally, the iron recycling‐related genes SPIC, SLC40A1, and HMOX1 were significantly upregulated in BACH1‐suppressed macrophages. Our findings provide insights into BACH1 regulation, which plays an important role in erythrophagocytosis and iron recycling in thalassemic macrophages.
Development of chondrocyte‐laden alginate hydrogels with modulated microstructure and properties for cartilage regeneration

Alginate hydrogel is an attractive biomaterial for cell microencapsulation. The microarchitecture of hydrogels can regulate cellular functions. This study aims to investigate the applicability of sodium citrate buffer (SCB) as a culture medium supplement for modulating the microstructure of alginate microbeads to provide a favorable microenvironment for chondrogenic induction. The chondrocyte‐laden microbeads, with and without TGF‐β3 incorporation, were produced through an encapsulator. The obtained small‐sized microbeads (~300 μm) were exposed to a treatment medium containing SCB, composed of varied concentrations of sodium citrate (1.10–1.57 mM), sodium chloride (3.00–4.29 mM), and ethylenediaminetetraacetic acid (0.60–0.86 mM) to partially degrade their crosslinked structure for 3 days, followed by culture in a normal medium until day 21. Scanning electron microscope micrographs demonstrated a loose hydrogel network with an enhanced pore size in the SCB‐treated microbeads. Increasing the concentration of SCB in the treatment medium reduced the calcium content of the microbeads via a Na+/Ca2+ exchange process and improved the water absorption of the microbeads, resulting in a higher swelling ratio. All the tested SCB concentrations were non‐cytotoxic. Increases in aggrecan and type II collagen gene expression and their corresponding extracellular matrix accumulation, glycosaminoglycans, and type II collagen were vividly detected in the TGF‐β3‐containing microbeads with increasing SCB concentrations in the treatment medium. Our findings highlighted that the combination of SCB treatment and TGF‐β3 incorporation in the chondrocyte‐laden microbeads is a promising strategy for enhancing cartilage regeneration, which may contribute to a versatile application in cell delivery and tissue engineering.
The Effectiveness of Educational Videos on Knowledge, Perception, and Anxiety About COVID-19 Vaccination

Background: The vaccination program is the main focus of handling COVID-19 at this time. Insufficient knowledge, poor perceptions, and high levels of anxiety can affect the success of the COVID-19 vaccination program. Health education is an option for overcoming these problems. Aims: This study was to find out the effect of health education through videos on knowledge, perception and anxiety in the community in the selected area In Indonesia. Method: Research used a quasi-experimental with a pretest-posttest control group. The sample consisted of the control and intervention groups, with 221 samples each taken by accidental sampling. This research was conducted in July-September 2021. The intervention provided was a health education video about COVID-19 vaccination for 13.27 minutes. The instrument consists of a self-reported questionnaire. Bivariate data test used Wilcoxon Signed Ranks Test and Mann Whitney. Result: The control group showed decreasing knowledge score of 1.0, an increased perception score of 0.4, and an anxiety score of 0.1. The group showed increased knowledge and perception scores (6.0 and 4.0), while the Anxiety score also decreased by 13.8. The pretest and posttest tests of the control group showed knowledge (p=0.0060), perception (p=0.202), and anxiety (p=0.659). The pretest and posttest of the intervention group for all variables showed p<0.001. The posttest difference test for all variables between the control and intervention groups was p<0.001. Conclusions: Health education through video effectively increases knowledge and perception and reduces anxiety about COVID-19 vaccination
Regime shift increase in East Asia's summer extreme hot day frequency across the late 1990s

Here we analysed the long‐term change in extreme hot days (EHDs) in East Asia during boreal summer (June–July–August) since 1979, where EHDs was defined as days exceeding or equalling the 90th percentile threshold of the climatological (1991–2020) daily Tmax and Tmin . EHDs frequency occurrence in East Asia during summer showed not only an increasing trend but also a distinct regime shift increase since the late 1990s. Based on this regime shift, we divided these years into two periods, P1 (1979–1998) and P2 (1999–2021), and found that different physical processes operated for each period's EHDs variability. P2's EHDs was related to the stationary wave originating from both the North Atlantic Ocean and the Indo‐Pacific warm pool, but these influences did not appear in P1. To investigate whether the observed regime shift increase was caused by natural variability or greenhouse gas concentration increases, we conducted a CO2 quadrupling experiment as well as a present‐day experiment with a fixed CO2 concentration using the Community Earth System Model with 28 ensemble members. We demonstrated that the regime shift increase of East Asian EHDs occurrences was due to increasing greenhouse gas concentrations. We further discussed the influence of Arctic sea ice reduction due to global warming on EHDs occurrences in East Asia.
Clinical efficacy and safety of trimonthly administration of goserelin acetate 10.8 mg in premenopausal Chinese females with symptomatic adenomyosis: a prospective cohort study

Abstract Objective This prospective cohort study aimed to compare the clinical efficacy and safety of goserelin 10.8 mg administered trimonthly with goserelin 3.6 mg administered monthly in premenopausal females with symptomatic adenomyosis. Methods We recruited 139 premenopausal females with adenomyosis who complained of dysmenorrhea and/or menorrhagia. The first group (n = 70) received a single subcutaneous injection of goserelin 10.8 mg, and the second group (n = 69) received monthly subcutaneous goserelin 3.6 mg administered for 3 months. Follow-up was performed at the outpatient department after 12 weeks. Results Ultimately, 130 patients completed the study, including 68 and 62 patients in the goserelin 10.8 mg (n = 70) and 3.6 mg (n = 69) groups, respectively. We observed a significant decrease in the dysmenorrhea (NRS) score, uterine volume, and cancer antigen 125 (CA125) levels, and a significant increase in hemoglobin (HGB) levels in both treatment groups. There was no significant difference between the two groups. The sum of the adverse event scores was slightly higher in the goserelin 3.6 mg than in the 10.8 mg group. Conclusions The clinical efficacy of trimonthly administration of goserelin 10.8 mg was equivalent to monthly 3.6 mg dosing and was non-inferior regarding safety and tolerability. Hence, it can be a more cost-effective and convenient alternative treatment option in premenopausal females with symptomatic adenomyosis. Trial registration ChiCTR2200059548
Nanostructuring surfaces by ion sputtering

Surface etching by ion sputtering can be used to pattern surfaces. Recent studies using the high-spatial-resolution capability of the scanning tunnelling microscope revealed in fact that ion bombardment produces repetitive structures at nanometre scale, creating peculiar surface morphologies ranging from self-affine patterns to `fingerprint'-like and even regular structures, for instance waves (ripples), chequerboards or pyramids. The phenomenon is related to the interplay between ion erosion and diffusion of adatoms (vacancies), which induces surface re-organization. The paper reviews the use of sputter etching to modify `in situ' surfaces and thin films, producing substrates with well defined vertical roughness, lateral periodicity and controlled step size and orientation.
Relationship between learners' mathematics-related belief systems and their approaches to non-routine mathematical problem solving : a case study of three high schools in Tshwane North district (D3), South Africa

This study aims to determine if there is a relationship between High School learners’ mathematics-related belief systems and their approach to mathematical non-routine problemsolving. Data was collected, firstly, from 425 high school learners using survey questionnaires and mathematics non-routine problem test and, lastly, from six cases selected from the 425 learners using interview schedules, open-ended and retrospective questionnaires. The basic methods used to analyze the data were factor analysis, thematic analysis and methodological triangulation. Learners’ mathematics-related beliefs were classified into three categories, according to Daskalogianni and Simpson’s (2001) macro-belief systems: utilitarian, systematic and exploratory. A number of learners’ problem solving strategies that reflected their general behaviour in non-routine mathematical problem solving were identified, that include unsystematic guess, check and revise; systematic guess, check and revise; trial-and-error; systematic listing; looking for a pattern; making a model; and considering a simple case. A weak positive linear relationship between learners’ mathematics-related belief systems and their approaches to non-routine problem solving was discovered.
The Central European and Russian Heat Event of July–August 2010

©2011 American Meteorological Society of the heat wave on grain production was known. This caused fears in Egypt, the world’s top wheat importer. These data were compiled from reports in the Associated Press and the Daily Telegraph related to the Russian heat wave. Moscow set a new all-time record high of 37.7°C (100°F) on 26 July 2010 (Table 1). This broke the previous record of 36.8°C (98.2°F) set back in 1920. The record was tied on 28 July but fell on 29 July 2010 when a new all-time record-high temperature of 38.3°C (101°F) was achieved. July 2010 was the hottest month on record for the city of Moscow. Many locations across western Russia topped 35°C (95°F) over the course of July and August. Moscow set 12 and 13 daily high temperature records, respectively, in July and August 2010 (Table 1). An impressive string of 11 consecutive high-temperature records was set during 2–12 August 2010. The heat event along with the drought conditions had huge impacts on lakes, rivers, and fish production. The blocking ridge continued into August (Fig. 3) along with the heat and record-high temperatures. Temperatures exceeded 34°C (94°F) during 2–8 August 2010, setting new daily high temperature records originally set back in 1920 and 1932. Moscow set new monthly highs on 4 and 6 August when the temperatures peaked at over 37°C (99°F) on both days. Previous research (by Galarneau et al., Kunkel, and others) has shown the importance of subtropical ridges in producing heat waves. Namias (in a 1982 Monthly Weather Review article) and Robinson (in a 2001 Journal of Applied Meteorology article) showed the patterns associated with protracted heat waves over North America. In a 2004 Nature article, Schar and Jendritzky examined the meteorological conditions associated with the European heat wave of 2003. This event primarily impacted central and western Europe. In a 1991 Weather paper, Brugge showed the importance of a blocking anticyclone during the record heat of August 1990 in the British Isles. In a 1995 Weather article, Thwaytes completed a study of The Central European and Russian Heat Event of July–August 2010
On the aerodynamics and performance of active vortex generators

As a building block in the development of smart lift-enhancement devices, a new concept for flow control using active vortex generators (AVGs) is presented. Ramp, wedge, and doublet wedge (Wheeler) VG configurations are investigated. The AVGs are designed to conform to the surface of the wing section at low alpha. As the section approaches the stall, they are deployed and accordingly, alpha(stall) and C(lmax) are increased. A qualitative analysis of the flow around the various VG configurations was conducted in a low speed wind tunnel at 1.6 ft/s and a Reynolds number of approximately 3400. The results demonstrate that ramp VGs produce vortices that have the longest distance at breakdown. The VGs were also applied to a 25-in. span, 8-in. chord NACA 4415 wing section. Optimization studies were conducted on the spanwise spacing, chordwise position, and size of statically deployed VGs. The test results demonstrate a 14-percent increase in C(lmax) while increasing alpha (stall) by up to 3.
Characterization of Alginate with Natural Polymers Combination for Drug Encapsulation

Alginate is one of the natural biopolymers that is widely used for drug formulations, combination of alginate with other polymers, such as gum acacia, pectin, and carrageenan can increase mechanical strength, therefore, can reduce leakage of the encapsulated active pharmaceutical ingredient from the polymer matrix. Interaction of alginate and these polymers can occur via intermolecular hydrogen bonds causing synergism, which is determined from the viscosity of polymer mixture. Alginate was combined with gum acacia/pectin/carrageenan in different blending ratios (100:0, 75:25, 50:50, 25:75, and 0:100) with and without addition of CaCl2. The synergism effect is obtained from the design of experimental (DoE), and calculation the percentage value of viscosity deviation viscosity synergism index, then the strength of gel was analyzed. The interaction between two polymers was observed using FTIR spectroscopy. In distilled water, the synergistic effect was found in the combination of alginate-carrageenan at ratios 25:75 and 50:50. Otherwise, in CaCl2 solution, synergistic effect appears in alginate-gum acacia (75:25), alginate-pectin (50:50 and 75:25), and alginate-carrageenan (50:50 and 75:25). The synergistic effect and strength of gel polymers increased, with the addition of CaCl2.
Velocity fluctuation analysis via dynamic programming

A new method of calculating one-dimensional velocity fluctuations from spatially resolved density fluctuation measurements is presented. The algorithm uses vector-matching methods of dynamic programming that match structures, such as turbulent fluctuations, in two data sets. The associated time delay between data sets is estimated by determining an optimal path to transform one vector to another. This time-delay-estimation (TDE) method establishes a new benchmark for velocity analysis by achieving higher sensitivity and frequency response than previously developed methods, such as time-resolved cross correlations and wavelets. TDE has been successfully applied to beam emission spectroscopy measurements of density fluctuations to obtain poloidal flow fluctuations associated with such phenomena as the geodesic acoustic mode. The dynamic programming algorithm should allow extension to high frequency velocity fluctuations associated with underlying electrostatic potential and resulting E×B fluctuations.
Dust‐acoustic‐drift wave instability in a space dusty plasma

[1] A dust-acoustic-drift wave instability is investigated in a nonuniform collisional dusty magnetoplasma. The plasma parameters are such that the electrons are magnetized, while the ions and dust grains are collisional and nonmagnetized, which may be characteristics of dusty plasmas in the E region of the Earth's ionosphere. The instability is driven by electron E × B and diamagnetic drifts. Possible application to the edges of dusty meteor trails at altitudes >95 km is considered. It is shown that this instability could be driven by an electron cross-field drift smaller than the ion thermal speed in a meteor trail containing a sufficient charge density of positively charged dust.
Magnetic properties of FeCuNbSiB nanocrystallized by flash annealing under high tensile stress

We have investigated the creep induced anisotropy, magnetostriction, domain structure and coercivity of nanocrystalline Fe73.5Cu1Nb3Si15. 5B7 crystallized by flash annealing under high tensile stress up to 800 MPa. The samples reveal a magnetic easy plane perpendicular to the stress axis with anisotropy constants up to Ku ≈ 12 kJ/m3 which even exceed the local magneto‐crystalline anisotropy (K1 ≈ 8 kJ/m3) of the crystalline Fe–Si phase. Although coercivity increases with Ku, it remains reasonably small even for huge induced anisotropy constants. The coercivity mechanism can be understood from the interplay of the induced anisotropy and the random fluctuations of the local magneto‐crystalline anisotropy of the crystallites. The tensile stress applied during annealing also affects the saturation magnetostriction constant λs. Thus, λs decreases with increasing magnitude of the annealing stress. This behaviour is compared to the elastic stress dependence of magnetostriction. The latter is well‐known for amorphous Co‐base alloys, but can also be observed in nanocrystalline alloys. The experimental results will be discussed theoretically in terms of the strain dependence of the magnetic anisotropy energy which ultimately provides the physical origin of magnetostrictive phenomena.
A Phase-Averaged Analysis of Droplet Dispersion in the Wake of a Square Cylinder in a Uniform Stream

Time-averaged and phase-averaged size and velocity distributions of water droplets in the turbulent wake of a square cross-section cylinder, measured with a phase-Doppler anemometer, are presented for a Reynolds number Re D =18,500, based on the free stream velocity, U∞, and cylinder side dimension, D
The stability of a slowly diverging swirling jet

The spatial evolution of small-amplitude unsteady disturbances of an axisymmetric swirling jet is examined theoretically. The slow axial divergence of the jet mean flow is accounted for by using the method of multiple scales and a consistent solution for both the mean flow and unsteady disturbance is derived. Previous work by Lu & Lele (1999) has considered the leading-order analysis, in which the modal eigenvalues are determined from locally parallel theory, but the key feature of our analysis is the solution of the next-order secularity condition for the axial variation of the wave-envelope amplitude. The swirling jet profile sustains two types of instability waves: the Kelvin–Helmholtz instability associated with axial shear, and a centrifugal instability which arises due to a decrease in circulation with radial distance. The evolution of the disturbance axial wavenumber and envelope amplitude with downstream distance is calculated. Numerical results show that the growth of the centrifugal mode is significantly curtailed as a result of a rapidly decaying envelope amplitude. The shear instability is significantly more amplified by the addition of swirl. The general solution for the disturbance envelope amplitude breaks down at so-called turning points. This is found to occur for a series of neutral propagating modes. A rescaling in the vicinity of the turning point shows that the amplitude in this region is governed by a parabolic cylinder equation. The modal amplitude is seen to decay very significantly through this turning point, even though the mode is neutral to leading order.
Pengaruh lingkungan kerja dimasa pandemik covid 19 terhadap produktivitas kerja di hotel hilton garden inn bali ngurah rai airport

Abstrak merupakan gambaran singkat dari keseluruhan artikel atau karya tulis ilmiah, yang isinya memuat empat komponen, yaitu: (1) Masalah dan tujuan; (2) Metoda yang digunakan; (3) Hasil dan Pembahasan; dan (4) Simpulan dan Saran. abstrak ditulis dalam satu paragraf tanpa catatan kaki atau kutipan pustaka, satu spasi, dan paling banyak memuat 250 kata dalam bahasa Indonesia. Abstrak dalam bahasa Inggris menyesuaikan.