Miracle-dz/UniFAR-FTUs huggingface dataset:
International Journal of Evaluation and Research in Education (IJERE)

Received Aug 9, 2021 Revised Jul 4, 2022 Accepted Aug 5, 2022 Vietnam education has been directed into a learner-centered approach and fostering competencies for students, especially self-directed learning. Thus, understanding how students’ learning styles impact self-directed learning are crucial for the new direction of Vietnam education. This research employed the survey method by questionnaire and presents the results of practical research on the correlation between styles of learning and self–directed learning of fifth-grade students at elementary schools in District 10, Ho Chi Minh City, Vietnam. The sample was 364 fifth graders voluntarily participating in the survey with the consent of parents. The results indicated that learning styles are strongly correlated with self–directed learning competency of fifth graders. The data revealed that students at District 10 not only attained high self-directed learning levels but also their learning styles attributing impactfully on their self-directed learning competency.
The Neo-Weberian contingency theory of innovation

Scholars in the discipline of strategic management are revisiting the widely accepted notion of the necessity of an organic structure to facilitate innovation. By highlighting a brief history of the phenomenal scientific advancements which has occurred under mechanistic structures in the former socialistic countries, the authors develop a new positive theory entitled the “neo-Weberian contingency theory of innovation. ” This paper demonstrates that innovation can occur in both organic and mechanistic organizational structures and that national culture has a significant impact on the desired organizational structure that is conducive to innovation across the globe. The authors find empirical evidence for the suggested hypotheses and therefore, further propose a three-dimensional isometric Culture-Structure typology. Finally, they hope that scholars will refine this theory and typology by further empirical validation.
Dynamics Of Unemployment Duration Among African Migrants In Sweden

Abstract This study uses Cox proportional hazard models to examine the likelihood of transition to first employment among specific groups of African migrants compared to the general population and other immigrants, respectively, in Sweden. Our findings demonstrate that the likelihood of employment upon arrival is strictly linked to country of origin after taking socio-demographic characteristics into account. When compared with the general population, lower employment likelihood was found among immigrant men and women from most African countries, especially from Somalia. In general, African men experienced better employment chances when compared with women. A gender gap on transition to first employment was found among immigrants from Tunisia, Algeria and Egypt indicating that it is particularly difficult for women from these countries to find employment.
Tacit collusion and capacity withholding in repeated uniform price auctions

This paper contributes to the study of tacit collusion by analyzing infinitely repeated multiunit uniform price auctions in a symmetric oligopoly with capacity constrained firms. Under both the Market Clearing and Maximum Accepted Price rules of determining the uniform price, we show that when each firm sets a price-quantity pair specifying the firm’s minimum acceptable price and the maximum quantity the firm is willing to sell at this price, there exists a range of discount factors for which the monopoly outcome with equal sharing is sustainable in the uniform price auction, but not in the corresponding discriminatory auction. Moreover, capacity withholding may be necessary to sustain this outcome. We extend these results to the case where firms may set bids that are arbitrary step functions of price-quantity pairs with any finite number of price steps. Surprisingly, under the Maximum Accepted Price rule, firms need employ no more than two price steps to minimize the value of the discount factor above which the perfectly collusive outcome with equal sharing is sustainable on a stationary path. Under the Market Clearing Price rule, only one step is required. That is, within the class of step bidding functions with a finite number of steps, maximal collusion is attained with simple price-quantity strategies exhibiting capacity withholding.
A Sensitivity Analysis of the Winter-Kennedy Method

The Winter Kennedy (WK) method is a popular way to measure the relative discharge and thus efficiency in Swedish hydropower plants. This is largely motivated by the numerous low head turbines and low cost of the method. The WK method is an index testing method that provides relative values of hydraulic efficiency by measuring differential pressures in one or two pairs of pressure taps in radial planes of the spiral casing. The method is described in IEC 60041 standard. Despite several limitations, it is generally used to verify the increment in efficiency for refurbishment projects and sometimes for the continuous flow rate monitoring. Uncertainties in the results reaching up to 5% have been reported in different studies. Those are often attributed to a change in flow conditions after the refurbishment or in the course of time. However, a proper error analysis has not been performed yet. This paper includes a review of the available literature related to the topic to understand its problems and possible ways to investigate its limitations systematically.
Towards a Comparative Theory of Locality in Migration Studies: Migrant Incorporation and City Scale

Building on the scholarship that theorises the restructuring of cities within neoliberal globalisation, this article calls for a comparative scalar approach to migrant settlement and transnational connection. Deploying a concept of city scale, the article posits a relationship between the differing outcomes of the restructuring of post-industrial cities and varying pathways of migrant incorporation. Committed to the use of nation-states and ethnic groups as primary units of analysis, migration scholars have lacked a comparative theory of locality; scholars of urban restructuring have not engaged in migration studies. Yet migrant pathways are both shaped by and contribute to the differential repositioning of cities. Migrants are viewed as urban scale-makers with roles that vary in relationship to the different positioning of cities within global fields of power.
Secondary organic aerosol formation from the laboratory oxidation of biomass burning emissions

Abstract. Biomass burning is an important source of aerosol and trace gases to the atmosphere, but how these emissions change chemically during their lifetimes is not fully understood. As part of the Fire Influence on Regional and Global Environments Experiment (FIREX 2016), we investigated the effect of photochemical aging on biomass burning organic aerosol (BBOA) with a focus on fuels from the western United States. Emissions were sampled into a small (150 L) environmental chamber and photochemically aged via the addition of ozone and irradiation by 254 nm light. While some fraction of species undergoes photolysis, the vast majority of aging occurs via reaction with OH radicals, with total OH exposures corresponding to the equivalent of up to 10 d of atmospheric oxidation. For all fuels burned, large and rapid changes are seen in the ensemble chemical composition of BBOA, as measured by an aerosol mass spectrometer (AMS). Secondary organic aerosol (SOA) formation is seen for all aging experiments and continues to grow with increasing OH exposure, but the magnitude of the SOA formation is highly variable between experiments. This variability can be explained well by a combination of differences in OH exposure and the total concentration of non-methane organic gases (NMOGs) in the chamber before oxidation, as measured by PTR-ToF-MS (r2 values from 0.64 to 0.83). From this relationship, we calculate the fraction of carbon from biomass burning NMOGs that is converted to SOA as a function of equivalent atmospheric aging time, with carbon yields ranging from 24±4 % after 6 h to 56±9 % after 4 d.
Trade and Minimum Wages in General Equilibrium: Theory and Evidence

Do minimum wages affect economic outcomes beyond low-skill employment? This paper develops a new model with heterogeneous firms under perfect competition in a Heckscher-Ohlin setting to show that a binding minimum wage raises product prices, encourages substitution away from labor, and creates unemployment. It reduces output and exports of the labor intensive good, despite higher prices and, less obviously, selection in the labor (capital) intensive sector becomes stricter (weaker). Exploiting rich regional variation in minimum wages across Chinese prefectures and using Chinese Customs data matched with firm level production data, we find robust evidence in support of causal effects of minimum wage consistent with our theoretical predictions.
PROTECTIVE EFFECTS OF NARINGENIN ON STREPTOZOTOCIN-INDUCED DIABETIC NEPHROPATHY IN RATS

INTRODUCTION Diabetic nephropathy (DN) is one of the alarming worldwide health problems at present leading to micro vascular (retinopathy, neuropathy and nephropathy) and macro vascular (heart attack, stroke and peripheral vascular disease) complications in many countries of the world . DN affects approximately one-third of all diabetic ABSTRACT Diabetic nephropathy is one of the serious diabetic complications and has been a major cause of end-st age renal disease which requires dialysis or transplant ation. The role of oxygen radicals are known for th e pathogenesis of kidney damage. There are several re cent studies focusing positively on therapeutics of diabetic nephropathy using traditional herbal medic ines. This study adopted oral administration of naringenin to determine the protective effects of i t n improving antilipid perxidative and antioxidan ts. Total of 24 male Wistar rats were divided into 4 groups a s follows: control, diabetic nephropathy (DN), DN+naringenin and naringenin alone. The altered bod y weight and kidney weight of DN induced animals were normalized in naringenin treated rats. There i s no significant difference in naringenin alone tre a ed groups. The increased lipid peroxidation and decrea sed antioxidants (GSH, GPx, SOD, CAT, and GST) levels were found in group II DN rats. The altered oxidative stress markers were normalized in naringe nin administered groups. The changes suggestive of dilation of tubules necrosis and swelling of the epithelial cells with slight loss in brush border integrity we re found in the kidney tissue of DN induced animals . The naringenin treated animals were normalized histopat hological changes. We conclude that naringenin have protective effects against DN due to its antilipid eroxidative effects.
Description and validation of a new automated surveillance system for Clostridium dif fi cile in Denmark

M. CHAINE*, S. GUBBELS, M. VOLDSTEDLUND, B. KRISTENSEN, J. NIELSEN, L. P. ANDERSEN, S. ELLERMANN-ERIKSEN, J. ENGBERG, A. HOLM, B. OLESEN, H.C. SCHØNHEYDER, C. ØSTERGAARD, S. ETHELBERG AND K. MØLBAK Department of Infectious Disease Epidemiology and Prevention, Statens Serum Institut, Copenhagen, Denmark Department of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark Department of Clinical Microbiology, Aarhus University Hospital, Aarhus, Denmark Department of Clinical Microbiology, Slagelse Hospital, Slagelse, Denmark Department of Clinical Microbiology, Odense University Hospital, Odense, Denmark Department of Clinical Microbiology, Herlev and Gentofte Hospital, Copenhagen, Denmark Department of Clinical Microbiology, Aalborg University Hospital, Aalborg, Denmark Department of Clinical Medicine, Aalborg University Hospital, Aalborg, Denmark Department of Clinical Microbiology, Hvidovre Hospital, Hvidovre, Denmark Division of Infectious Disease Preparedness, Statens Serum Institut, Copenhagen, Denmark
CASA on the fringe: VLBI data processing in the CASA software package

In recent years new functionality for VLBI data processing has been added to the CASA package. This paper presents the new CASA tasks 'fringefit' and 'accor', which are closely matched to their AIPS counterparts FRING and ACCOR. Several CASA tasks received upgrades to handle VLBI specific metadata. With the current CASA release VLBI data processing is possible, and functionality will be expanded in the upcoming release. Longer term developments include fringe fitting of broad, non-continuous frequency bands and dispersive delays, which will ensure that the number of use cases for VLBI calibration will increase in future CASA releases.
Human adipose-derived mesenchymal stem cells laden in gellan gum spongy-like hydrogels for volumetric muscle loss treatment

Background: volumetric muscle loss (VML) is a traumatic massive loss of muscular tissue which frequently leads to amputation, limb loss, or lifetime disability. The current medical intervention is limited to autologous tissue transfer, which usually leads to non-functional tissue recovery. Tissue engineering holds a huge promise for functional recovery. Methods: in this work, we evaluated the potential of human adipose-derived mesenchymal stem cells (hASCs) pre-cultured in gellan gum based spongy-like hydrogels (SLHs). Results: in vitro, hASCs were spreading, proliferating, and releasing growth factors and cytokines (i.e. fibroblast growth factor, hepatocyte growth factor, insulin-like growth factor 1, interleukin-6 (IL-6), IL-8, IL-10, vascular endothelial growth factor) important for muscular regeneration. After implantation into a volumetric muscle loss (VML) mouse model, implants were degrading overtime, entirely integrating into the host between 4 and 8 weeks. In both SLH and SLH + hASCs defects, infiltrated cells were observed inside constructs associated with matrix deposition. Also, minimal collagen deposition was marginally observed around the constructs along both time-points. Neovascularization (CD31+ vessels) and neoinnervation (β-III tubulin+ bundles) were significantly detected in the SLH + hASCs group, in relation to the SHAM (empty lesion). A higher density of α-SA+ and MYH7+ cells were found in the injury site among all different experimental groups, at both time-points, in relation to the SHAM. The levels of α-SA, MyoD1, and myosin heavy chain proteins were moderately increased in the SLH + hASCs group after 4 weeks, and in the hASCs group after 8 weeks, in relation to the SHAM. Conclusions: taken together, defects treated with hASCs-laden SLH promoted angiogenesis, neoinnervation, and the expression of myogenic proteins.
Boundary Layer Flow of a Nanofluid Past a Stretching Sheet with a Convective Boundary Condition in the Presence of Magnetic Field and Thermal Radiation

Boundary layer flow induced in a nanofluid due to a linearly stretching sheet in the presence of thermal radiation and induced magnetic field is studied numerically, following a similarity analysis of the transport equations. The transport model employed includes the effect of Brownian motion and thermophoresis. The analysis shows that temperature and concentration profiles in the respective boundary layers depend, besides the Prandtl and Lewis numbers, on five additional dimensionless parameters, namely a Brownian motion parameter Nb, a thermophoresis parameter Nt, a thermal radiation parameter Ra, a local magnetic field parameter Mx and a convection Biot number Bi. The thermal boundary thickens with a rise in the local temperature as the radiation parameter, Brownian motion, thermophoresis and convective heating each intensify. The Lewis number has no effect on the temperature distribution in this case. Fixing the other parameters, the local concentration of nanoparticles increases as the convection Biot number increases but decreases as the Lewis number increases. For fixed Ra, Mx, Pr, Le and Bi, the reduced Nusselt number decreases but the reduced Sherwood number increases as the Brownian motion and thermophoresis effects increases.
P Revisited: Money-Based In ation Forecasts with a Changing Equilibrium Velocity

This paper implements recursive techniques to estimate the equilibrium level of M2 velocity and to forecast in ation using the P model. The recursive estimates of equilibrium velocity are obtained by applying regression trees and least squares methods to a standard representation of M2 demand, namely a model in which the velocity of M2 depends on the opportunity cost of holding M2 instruments. Equilibrium velocity is de ned as the level of velocity that would be expected to obtain if deposit rates were at their long-run average (equilibrium) value. We simulate the alternative models to obtain real-time forecasts of in ation and evaluate the performance of the forecasts obtained from the alternative models. We nd that, while a P model assuming a constant equilibrium velocity does not provide accurate in ation forecasts in the 1990s, a model based on our time-varying equilibrium velocity estimates does quite well.
Relational Knowledge Distillation

Knowledge distillation aims at transferring knowledge acquired in one model (a teacher) to another model (a student) that is typically smaller. Previous approaches can be expressed as a form of training the student to mimic output activations of individual data examples represented by the teacher. We introduce a novel approach, dubbed relational knowledge distillation (RKD), that transfers mutual relations of data examples instead. For concrete realizations of RKD, we propose distance-wise and angle-wise distillation losses that penalize structural differences in relations. Experiments conducted on different tasks show that the proposed method improves educated student models with a significant margin. In particular for metric learning, it allows students to outperform their teachers' performance, achieving the state of the arts on standard benchmark datasets.
Tracking students in secondary education : consequences for student performance and inequality

This dissertation examined whether the classification of secondary school pupils into different academic levels (e.g. VMBO (preparatory secondary vocational education), HAVO (senior general secondary education), VWO (pre-university education)) improves academic performance and whether it influences the academic opportunities. For instance, we found that pupils who are about to transition to HAVO or VWO perform better at VWO level and that pupils with highly educated parents receive better academic advice from their teacher in group 8 than their academic performance warrants. We also found that early learners are often categorised at a lower academic level than late learners, and even more so in countries with early selection criteria. This additional misallocation in countries with early selection has little impact on the long-term outcomes like final academic level or salary scale.
Splicing factor SRSF 1 negatively regulates alternative splicing of MDM 2 under damage

Genotoxic stress induces alternative splicing of the oncogene MDM2 generating MDM2-ALT1, an isoform attributed with tumorigenic properties. However, the mechanisms underlying this event remain unclear. Here we explore MDM2 splicing regulation by utilizing a novel minigene that mimics endogenous MDM2 splicing in response to UV and cisplatinum-induced DNA damage. We report that exon 11 is necessary and sufficient for the damage-specific alternative splicing of the MDM2 minigene and that the splicing factor SRSF1 binds exon 11 at evolutionarily conserved sites. Interestingly, mutations disrupting this interaction proved sufficient to abolish the stressinduced alternative splicing of the MDM2 minigene. Furthermore, SRSF1 overexpression promoted exclusion of exon 11, while its siRNA-mediated knockdown prevented the stress-induced alternative splicing of endogenous MDM2. Additionally, we observed elevated SRSF1 levels under stress and in tumors correlating with the expression of MDM2-ALT1. Notably, we demonstrate that MDM2-ALT1 splicing can be blocked by targeting SRSF1 sites on exon 11 using antisense oligonucleotides. These results present conclusive evidence supporting a negative role for SRSF1 in MDM2 alternative splicing. Importantly, we define for the first time, a clear-cut mechanism for the regulation of damage-induced MDM2 splicing and present potential strategies for manipulating MDM2 expression via splicing modulation.
Pi1B pulsations at the South American equatorial zone during the 29 October 1994 magnetic storm

The effects of the great magnetic storm of 29 October 1994 on the daytime equatorial ionosphere have been studied by a ground-based array of fluxgate magnetometers in South America. The array covers around 2 h in magnetic local time and spans dip angles from 6.7N to 10.8S, with additional very-low latitude and nightside dip equator stations as reference. Following an abrupt increase in the AE index during the storm main phase, intense Pi1B activity is seen over a wide region around the prenoon dip equator. The pulsations are strongly attenuated not propagating outside the equatorial zone and have differences in time onset at different longitudes. It is proposed that they are associated with gradient-drift plasma instabilities triggered by prompt penetration of high latitude electric fields. Local ionospheric properties appear to control instability onset and growth rate along the dip equator.
Efficient Trading Strategies in the Presence of Market Frictions

In this paper we provide a price characterization of efficient consumption bundles in multiperiod economies with market frictions. Efficient consumption bundles are those that are chosen by at least one rational agent with monotonic state-independent and risk-averse preferences and a given future endowment. Frictions include dynamic market incompleteness, proportional transaction costs, short selling costs, borrowing costs, taxes, and others. We characterize the inefficiency cost of a trading strategy -the difference between the investment it requires and the largest amount required by any rational agent to obtain the same utility level - and we propose a measure of portfolio performance based on it. We also show that the arbitrage bounds on a contingent claim to consumption cannot be tightened based on efficiency arguments without restricting preferences or endowments. We examine the efficiency of common investment strategies in economies with borrowing costs due to asymmetric information, short selling costs, or bid-ask spreads. We find that market frictions generally change and typically shrink the set of efficient investment strategies, shifting investors away from well-diversified strategies into low cost ones, and for large frictions into no trading at all. Hence we observe strategies that become inefficient with market frictions, as well as strategies that are rationalized by market frictions.