Miracle-dz/UniFAR-FTUs huggingface dataset:
Developing, testing and interpreting a cross age peer tutoring intervention for mathematics : social interdependence, systematic reviews and an empirical study

Abstract Cross-age peer tutoring is a peer learning strategy which has been shown to improve both socio and academic process of learning factors as well improve attainment in various subjects. There is, however, still room for the intervention to be developed: which was the aim of this work. This was done by applying important socio interdependent aspects such as resource, interpersonal and goal interdependence to a cross-age-peer tutoring intervention in mathematics. Prior to developing the method, the researcher engaged with the theoretical literature as well as provides two forms of systematic reviews. The newly informed cross-age peer tutoring method was then tested on three schools, two of which adopted a pre-post-test quasi-experimental design and one took a single group pre-post-test design. All the schools applied an Interdependent Cross-Age Tutoring (ICAT) format for a period of 6 weeks, on the basis of a 30 minute session once a week. Mathematics head-teachers, facilitators, teachers and students were all trained in various aspects of ICAT. To capture and interpret the impact of the intervention, performance instruments were innovated for each school, together with various previously established attitude sub-scales. In order to measure implementation fidelity ICAT lesson materials were collected for most of the topics and each school received general as well as structured pair observations from the researcher. Also, in order to explore how different groups learned under ICAT the lesson materials of the higher performing tutees were compared to those of the lower performing tutees on various aspects. The findings were mixed, with one of the quasi-experimental design schools showing a highest effect size of 0.81 favoring the ICAT group. The impact of ICAT on important and broader processes of learning attitude variables, social as well as academic, are also discussed. Comparisons of lesson materials between higher performing tutees and lower performing tutees revealed that the highest performing tutees showed better implementation of an essential socio-interdependent aspect: setting a shared academic goal.
Health aspects associated with wind turbine noise—Results from three field studies

Wind farms are a new source of environmental noise. The impact of wind turbine noise on health and well-being has not yet been well-established and remains under debate. Long-term effects, especially, are not known, because of the short time wind turbines have been operating and the relatively few people who have so far been exposed to wind turbine noise. As the rate of new installations increases, so does the number of people being exposed to wind turbine noise and the importance of identifying possible adverse health effects. Data from three cross-sectional studies comprising A-weighted sound pressure levels of wind turbine noise, and subjectively measured responses from 1,755 people, were used to systematically explore the relationships between sound levels and aspects of health and well-being. Consistent findings, that is, where all three studies showed the same result, are presented, and possible associations between wind turbine noise and human health are discussed. © 2011 Institute of Noise Control Engineering.
Paving the way towards complex blood-brain barrier models using pluripotent stem cells

A tissue with great need to be modeled in vitro is the blood-brain barrier (BBB). The BBB is a tight barrier that covers all blood vessels in the brain and separates the brain microenvironment from the blood system. It consists of three cell types [neurovascular unit (NVU)] that contribute to the unique tightness and selective permeability of the BBB and has been shown to be disrupted in many diseases and brain disorders, such as vascular dementia, stroke, multiple sclerosis, and Alzheimer’s disease. Given the progress that pluripotent stem cells (PSCs) have made in the past two decades, it is now possible to produce many cell types from the BBB and even partially recapitulate this complex tissue in vitro. In this review, we summarize the most recent developments in PSC differentiation and modeling of the BBB. We also suggest how patient-speciﬁc human-induced PSCs could be used to model BBB dysfunction in the future. Lastly, we provide perspectives on how to improve production of the BBB in vitro, for example by improving pericyte differentiation protocols and by better modeling the NVU in the dish.
Le Front national français dans l’espace des droites radicales européennes

En depit de ses evolutions recentes, le Front national francais conserve les traits distinctifs de la droite radicale populiste europeenne, au regard de la perennite de sa strategie de « niche » sur les enjeux culturels tels que l’immigration ou l’islam et de la permanence de son populisme ethno-nationaliste autoritaire. Le FN se trouve en outre a la pointe du combat contre l’Union europeenne et son programme dessine les contours d’un social-populisme de crise(s). En termes systemiques, enfin, le parti de Marine Le Pen se situe aujourd’hui au « barycentre » strategique de la droite radicale en Europe, entre tentative de normalisation et radicalite.
Remote Sensing Image Fusion Using Ripplet Transform and Compressed Sensing

In this letter, we propose a novel remote sensing image fusion method based on the ripplet transform and the compressed sensing (CS) theory. The ripplet transform generalizes the curvelet transform by adding two parameters, namely, support c and degree d. These parameters provide the ripplet transform with anisotropy capability of representing singularities along arbitrarily shaped curves, and the curvelet transform is just a special case of the ripplet transform with c=1 and d=2. In the proposed method, the spatial details are first extracted from the PAN image by means of ripplets, and then, they are injected into the MS bands by the proposed injection model named CS-based injection. The aim of this model, which is based on the CS theory, is to minimize the spectral distortion in the pan-sharpened MS bands with respect to the original ones. The experimental results carried out on IKONOS and QuickBird data sets demonstrate that the proposed method provides better fused images in terms of the visual and quantitative evaluations.
Gay men and drag: Dialogical resistance to hegemonic masculinity

Hegemonic masculinity has been a valuable theoretical approach to understanding ways in which cultures coax members to conform to the requisites of dominant masculinity. However, it has difficulty explaining individual resistances to hegemonic pressures. This paper is one in a series of projects which have identified communities that explicitly defy traditional masculinity norms in order to understand the psychosocial methodologies employed to accomplish resistance within the systemic pressures of hegemonic masculinity. We utilized dialogical self theory as a model to investigate how a gay male drag theater troupe negotiates masculinity in order to understand how that negotiation can help resist dominant discourses of masculinity and form community.
3D Channel Simulations Including Scattering from Non-Gaussian Rough Surfaces

An original approach to characterize radio channel in indoor environments composed of rough surfaces is presented. It is based on algorithms developed for the image rendering field that are extended to the radio wave propagation. To simulate rough surfaces scattering, these algorithms need information about roughness. A possible solution consists of quantifying roughness by using statistical distributions of surface parameters, such as heights, slopes and local normals. In this paper, different theoretical statistical laws are presented and a fitting is realized with corresponding distributions of three real samples of wall roughcasts. For these cases, the best parameter to quantify the roughness is presented. Next, two algorithms which take roughness into account are detailed and compared with first results of channel simulations in indoor environments at 60 GHz.
Blood Pressure Regulation in Humans: Calculation of an “Error Signal” in Control of Sympathetic Nerve Activity

Within an individual, diastolic blood pressure (DBP) is negatively related to sympathetic burst incidence, such that lower pressure is associated with high burst incidence. Our goal was to explore the use of a calculation of a DBP “error signal” in the control of muscle sympathetic nerve activity in men and women. Baseline muscle sympathetic nerve activity was measured in healthy young men (n=22) and women (n=28). Women had significantly lower muscle sympathetic nerve activity than men (29±3 versus 43±2 bursts per 100 heartbeats; P<0.05). For each individual, the DBP at which there is a 50% likelihood of a muscle sympathetic nerve activity burst, the “T50” value, was calculated. Mean DBP was subtracted from the T50 blood pressure as an approximate error signal for burst activation. Error signal was negative in both sexes, indicating that DBP in both sexes was higher than the DBP value associated with a 50% burst likelihood. However, average error signal was significantly larger in women (−4±2 mm Hg) than in men (−1±0 mm Hg; P<0.05 versus women). We conclude that women operate at a mean DBP greater than their T50 compared with men, and this may be a contributing factor to low basal muscle sympathetic nerve activity in women. The relationship between error signal and burst incidence may provide important insight into the control of muscle sympathetic nerve activity across sexes and in various populations.
Epidemiological similarities between appendicitis and diverticulitis suggesting a common underlying pathogenesis.

BACKGROUND Nonperforating appendicitis is primarily a disease of children, and nonperforating diverticulitis affects mostly older adults. Apart from these age differences, the diseases share many epidemiological features, such as association with better hygiene and low-fiber diets. HYPOTHESIS Nonperforating appendicitis and nonperforating diverticulitis are different manifestations of the same underlying colonic process and, if so, should be temporally related. DESIGN Data from the National Hospital Discharge Survey were analyzed to investigate the incidence of admissions for appendicitis in children and diverticulitis in adults between 1979 and 2006. SETTING Statistical sampling of all US hospitals. PATIENTS Children admitted for appendicitis and adults with diverticulitis. MAIN OUTCOME MEASURES Time trends were assessed for stationarity using unit root analysis, and similarities between time trends were tested using cointegration analysis. RESULTS The incidence rates of nonperforating appendicitis and nonperforating diverticulitis exhibited U-shaped secular trends. The rates of perforating appendicitis and perforating diverticulitis rose slowly across all the study years. Cointegration analysis demonstrated that the rates of nonperforating and perforating diverticulitis did not cointegrate significantly over time. The rates of nonperforating and perforating appendicitis did not vary together. Nonperforating appendicitis and nonperforating diverticulitis rates were significantly cointegrated over time. CONCLUSIONS Childhood appendicitis and adult diverticulitis seem to be similar diseases, suggesting a common underlying pathogenesis. Secular trends for their nonperforating and perforating forms are strikingly different. At least for appendicitis, perforating disease may not be an inevitable outcome from delayed treatment of nonperforating disease. If appendicitis represents the same pathophysiologic process as diverticulitis, it may be amenable to antibiotic rather than surgical treatment.
Social Hierarchy and the Death Penalty: A Social Dominance Perspective

This study examines the social factors related to use of the death penalty. In Study 1, the number of executions in each of the 50 states of the United States since 1976 was predicted from: (1) degree of social hierarchy, (2) Old Confederacy status, (3) political conservatism, (4) degree of violent crime, (5) income, (6) population size, (7) population density, (8) degree of education, (9) proportion of population which is white, and (10) proportion of whites murdered. Social hierarchy and conservatism were consistently and significantly related to use of executions. Study 2 predicted execution use in 147 countries from: (1) degree of social hierarchy, (2) number of murders, (3) size of government, (4) area, (5) education, (6) gross national product, and (7) population size. The degree of social hierarchy and number of murders were significantly related to execution use. While some of these results were predicted by the symbolic motives model or the deterrence model, it is argued that social dominance theory offers a more comprehensive explanation of the results as a whole.
An evolutionary algorithm to discover numeric association rules

Association rules are one of the most used tools to discover relationships among attributes in a database. Nowadays, there are many efficient techniques to obtain these rules, although most of them require that the values of the attributes be discrete. To solve this problem, these techniques discretize the numeric attributes, but this implies a loss of information. In a general way, these techniques work in two phases: in the first one they try to find the sets of attributes that are, with a determined frequency, within the database (frequent itemsets), and in the second one, they extract the association rules departing from these sets. In this paper we present a technique to find the frequent itemsets in numeric databases without needing to discretize the attributes. We use an evolutionary algorithm to find the intervals of each attribute that conforms a frequent itemset. The evaluation function itself will be the one that decide the amplitude of these intervals. Finally, we evaluate the tool with synthetic and real databases to check the efficiency of our algorithm.
A Spitzer View of Protoplanetary Disks in the γ Velorum Cluster

We present new Spitzer Space Telescope observations of stars in the young (~5 Myr) γ Velorum stellar cluster. Combining optical and 2MASS photometry, we have selected 579 stars as candidate members of the cluster. With the addition of the Spitzer mid-infrared data, we have identified five debris disks around A-type stars and five to six debris disks around solar-type stars, indicating that the strong radiation field in the cluster does not completely suppress the production of planetesimals in the disks of cluster members. However, we find some evidence that the frequency of circumstellar primordial disks is lower, and the infrared flux excesses are smaller than for disks around stellar populations with similar ages. This could be evidence for a relatively fast dissipation of circumstellar dust by the strong radiation field from the highest mass star(s) in the cluster. Another possibility is that γ Velorum stellar cluster is slightly older than reported ages and the low frequency of primordial disks reflects the fast disk dissipation observed at ~5 Myr.
A Comparison of American and Indian Consumers' Perceptions of Electronic Commerce

Electronic commerce is often touted as a global phenomenon. However, most studies of e-commerce have focused on more developed countries. While it is important to understand e-commerce in the context of richer, more developed countries, it also impacts developing countries. Using diffusion of innovation theory, and literature on trustworthiness in e-commerce and dimensions of national culture as theoretical bases, this research investigates how consumers perceive e-commerce differently in India and the United States. Results indicate that Indian and American consumers perceive the relative advantage, ease of use, compatibility, and the demonstrability of results of e-commerce differently. Post hoc analyses reveal there is an association between perceptions of e-commerce and use intentions. This result holds across nationalities, although the pattern of influence differs according to country.
Russia and its supporters in Europe: trans-ideology à la carte?

Abstract The impact of crisis in Ukraine on EU–Russia relations appears twofold. On the one hand, it revealed the high degree of disdain all across Europe to Moscow's neo-imperial approach. On the other hand, it unveiled a great deal of affection and sympathy to Kremlin's policy among a number of non-mainstream but significant groups within the EU. In this article, we mirror the major troubles of today’s Europe, as seen from Moscow’s perspective, with four nodal points of the Kremlin’s hegemonic discourse: social conservatism, nation state-based policies, independence from the US influence and the glorification of Russia’s self-inflicted mission of fighting contemporary neo-fascism. Our analysis of non-mainstream political parties in EU member states, sensitive and responsive to the Kremlin’s agenda, suggests that Putin's regime and Russia sympathizers in Europe pragmatically use each other, thereby challenging the classical ideological paradigms. This translates Russia’s policies into a trans-ideological repertoire of different discourses that differently resonate among the groups of Russia sympathizers.
Professionalism and Ethical Standards Among Salespeople in a Deregulated Environment: A Case Study of the Trucking Industry

Passage of the 1980 Motor Carrier Act signaled a significant change in the direction of government regulation in the trucking industry, resulting in a substantially more competitive industry. Not surprisingly, the Act led to significant changes within the trucking industry, some positive and others negative. The purpose of this article is to examine the extent to which deregulation led to an increase or decrease in professionalism and ethical conduct among trucking company salespeople. Using results from a survey of domestic shippers, it is concluded that deregulation heightened professionalism and ethical standards among carrier sales representatives.
Employment Adjustment and Labor Utilization

Standard models of labor adjustment assume that firms can change only the size of their workforce (the extensive margin) and not the number of hours of their existing employees (the intensive margin) in response to shocks. I propose a general equilibrium search model that allows for adjustment on both of these margins. The model includes on‐the‐job search that generates different vacancy filling and attrition rates across firms. I calibrate the model to a unique matched employer–employee panel of Danish firms and simulate two labor market policies aimed at promoting job creation: hiring subsidies and a reduction in the official workweek.
Ancestrality and evolution of trait syndromes in finches (Fringillidae)

Abstract Species traits have been hypothesized by one of us (Ponge, 2013) to evolve in a correlated manner as species colonize stable, undisturbed habitats, shifting from “ancestral” to “derived” strategies. We predicted that generalism, r‐selection, sexual monomorphism, and migration/gregariousness are the ancestral states (collectively called strategy A) and evolved correlatively toward specialism, K‐selection, sexual dimorphism, and residence/territoriality as habitat stabilized (collectively called B strategy). We analyzed the correlated evolution of four syndromes, summarizing the covariation between 53 traits, respectively, involved in ecological specialization, r‐K gradient, sexual selection, and dispersal/social behaviors in 81 species representative of Fringillidae, a bird family with available natural history information and that shows variability for all these traits. The ancestrality of strategy A was supported for three of the four syndromes, the ancestrality of generalism having a weaker support, except for the core group Carduelinae (69 species). It appeared that two different B‐strategies evolved from the ancestral state A, both associated with highly predictable environments: one in poorly seasonal environments, called B1, with species living permanently in lowland tropics, with “slow pace of life” and weak sexual dimorphism, and one in highly seasonal environments, called B2, with species breeding out‐of‐the‐tropics, migratory, with a “fast pace of life” and high sexual dimorphism.
Cell-Surface Marker Signatures for the Isolation of Neural Stem Cells, Glia and Neurons Derived from Human Pluripotent Stem Cells

Background Neural induction of human pluripotent stem cells often yields heterogeneous cell populations that can hamper quantitative and comparative analyses. There is a need for improved differentiation and enrichment procedures that generate highly pure populations of neural stem cells (NSC), glia and neurons. One way to address this problem is to identify cell-surface signatures that enable the isolation of these cell types from heterogeneous cell populations by fluorescence activated cell sorting (FACS). Methodology/Principal Findings We performed an unbiased FACS- and image-based immunophenotyping analysis using 190 antibodies to cell surface markers on naïve human embryonic stem cells (hESC) and cell derivatives from neural differentiation cultures. From this analysis we identified prospective cell surface signatures for the isolation of NSC, glia and neurons. We isolated a population of NSC that was CD184+/CD271−/CD44−/CD24+ from neural induction cultures of hESC and human induced pluripotent stem cells (hiPSC). Sorted NSC could be propagated for many passages and could differentiate to mixed cultures of neurons and glia in vitro and in vivo. A population of neurons that was CD184−/CD44−/CD15LOW/CD24+ and a population of glia that was CD184+/CD44+ were subsequently purified from cultures of differentiating NSC. Purified neurons were viable, expressed mature and subtype-specific neuronal markers, and could fire action potentials. Purified glia were mitotic and could mature to GFAP-expressing astrocytes in vitro and in vivo. Conclusions/Significance These findings illustrate the utility of immunophenotyping screens for the identification of cell surface signatures of neural cells derived from human pluripotent stem cells. These signatures can be used for isolating highly pure populations of viable NSC, glia and neurons by FACS. The methods described here will enable downstream studies that require consistent and defined neural cell populations.
Functional and conserved domains of the Drosophila transcription factor encoded by the segmentation gene knirps

The Drosophila gap gene knirps (kni) is required for abdominal segmentation. It encodes a steroid/thyroid orphan receptor-type transcription factor which is distributed in a broad band of nuclei in the posterior region of the blastoderm. To identify essential domains of the kni protein (KNI), we cloned and sequenced the DNA encompassing the coding region of nine kni mutant alleles of different strength and kni-homologous genes of related insect species. We also examined in vitro-modified versions of KNI in various assay systems both in vitro and in tissue culture. The results show that KNI contains several functional domains which are arranged in a modular fashion. The N-terminal 185-amino-acid region which includes the DNA-binding domain and a functional nuclear location signal fails to provide kni activity to the embryo. However, a truncated KNI protein that contains additional 47 amino acids exerts rather strong kni activity which is functionally defined by a weak kni mutant phenotype of the embryo. The additional 47-amino-acid stretch includes a transcriptional repressor domain which acts in the context of a heterologous DNA-binding domain of the yeast transcriptional activator GAL4. The different domains of KNI as defined by functional studies are conserved during insect evolution.