Miracle-dz/UniFAR-FTUs huggingface dataset:
Taking Full Advantage of Multiuser Diversity in Mobile Ad Hoc Networks

Multiuser diversity has been shown to increase the throughput of mobile ad hoc wireless networks (MANETs) when compared to fixed wireless networks. This paper addresses a multiuser diversity strategy that permits one of multiple one-time relays to deliver a packet to its destination. We show that the throughput of the original single one-time relay strategy is preserved by our multi-copy technique. The reason behind achieving the same asymptotic throughput is the fact that, as we demonstrate in this paper, interference for communicating among closest neighbors is bounded for different channel path losses, even when goes to infinity. We show that a significant delay reduction is possible by multi-copy relaying when is finite. Furthermore, we find that the average delay and delay variance for both the one and multi-copy relay strategies scale like and , respectively. We derive an approximation of the delay for multi-copy forwarding scheme and demonstrate that this approximation is very close to simulation results in MANET systems.
Leaves at low versus high rainfall: coordination of structure, lifespan and physiology.

• Across species, leaf lifespan (LL) tends to be correlated with leaf mass per area (LMA). Previously we found that Australian perennial species from low-rainfall sites had c . 40% shorter LL at a given LMA than high-rainfall species. • Here we relate indices of leaf strength (work to shear, W shear , and tissue toughness) to LL and LMA across the same suite of species. W shear is the work required to cut a leaf with a blade; W shear divided by leaf thickness gives tissue toughness. • Low- and high-rainfall species did not differ in their LL at a given W shear , but dry-site species had lower W shear at a given LMA, leading to the observed LL - LMA shift with rainfall. These patterns were driven by 50% lower tissue toughness in dry-site species. • The lower toughness was linked with high leaf N concentration, which is known to enhance water conservation during photosynthesis in low-rainfall species. Our results suggest that a significant cost of this strategy is reduced LL for a given investment in leaf tissue (LMA).
Mercantilism as Strategic Trade Policy: The Anglo-Dutch Rivalry for the East India Trade

This paper interprets seventeenth-century mercantilism in light of recent theories of strategic trade policy. Long-distance international commerce during the mercantilist period was undertaken chiefly by state-chartered monopoly trading companies and was therefore conducted under conditions of imperfect competition. The economic structure of the Anglo-Dutch rivalry for the East India trade provides an excellent illustration of an environment in which the profit-sharting motive for strategic trade policies exists. Dutch supremacy in the early East India trade was facilitated by a managerial incentive scheme in the monopoly charter that enabled it to achieve a Stackelberg leadership position against the English. Using data from the East India trade around 1620 in a Cournot duopoly model, I find that the managerial incentives yielded greater Dutch profits than would have been obtained from a standard profit-maximizing objective and that the scope for other strategic trade policies was clearly present.
May “Mitochondrial Eve” and Mitochondrial Haplogroups Play a Role in Neurodegeneration and Alzheimer's Disease?

Mitochondria, the powerhouse of the cell, play a critical role in several metabolic processes and apoptotic pathways. Multiple evidences suggest that mitochondria may be crucial in ageing-related neurodegenerative diseases. Moreover, mitochondrial haplogroups have been linked to multiple area of medicine, from normal ageing to diseases, including neurodegeneration. Polymorphisms within the mitochondrial genome might lead to impaired energy generation and to increased amount of reactive oxygen species, having either susceptibility or protective role in several diseases. Here, we highlight the role of the mitochondrial haplogroups in the pathogenetic cascade leading to diseases, with special attention to Alzheimer's disease.
Exercise Effect on Oxidative Stress Is Independent of Change in Estrogen Metabolism

Purpose: The effect of exercise training on lipid peroxidation and endogenous estrogens is not well understood in premenopausal women. Exercise effects on these variables could mediate observed associations of exercise with hormonally related cancers, including breast cancer. The purpose of the study is to determine the effect of 15 weeks of aerobic exercise on lipid peroxidation, endogenous estrogens, and body composition in young, healthy eumenorrheic women. Methods: Fifteen sedentary premenopausal women (18-25 years) participated. Pre- and post-exercise training urine collection (three 24-h samples) started 48 h after most recent exercise session for analysis of a marker of lipid peroxidation (F2-isoprostane) and endogenous estrogens, including 2-hydroxyestrogens, 4-hydroxyestrogens, 16-α-hydroxyestrone, and ratios of these metabolites (2:16, 2:4). Body composition was measured by dual-energy X-ray absorptiometry, and F2-isoprostanes and estrogens were measured by gas chromatography-mass spectrometry. Results: Aerobic exercise resulted in a 34% decrease in F2-isoprostane (P = 0.02), a 10% increase in fitness (P = 0.004), a 1.2 kg decrease in body mass (P = 0.007), and a 1.8 kg decrease in fat mass (P = 0.04). No significant changes were noted in estrogens. Conclusions: The effect of exercise training on oxidative stress may be relevant to risk for hormonally related cancers. (Cancer Epidemiol Biomarkers Prev 2008;17(1):220–3)
Latent Variable Modelling with Non-Ignorable Item Nonresponse: A General Framework and Multigroup Models for Cross-National Analysis

When missing data are produced by a non-ignorable nonresponse mechanism, analysis of the observed data should include a model for the probabilities of responding. In this paper we propose such models for nonresponse in survey questions which are treated as multiple-item measures of latent constructs and analysed using latent variable models. The nonresponse models that we describe include additional latent variables (latent response propensities) which determine the response probabilities. We argue that this model should be specified as flexibly as possible, and propose models where the response propensity is a categorical variable (a latent response class). This can be combined with any latent variable model for the survey items themselves, and an association between the latent variables measured by the items and the latent response propensities implies a model with non-ignorable nonresponse. We consider in particular the analysis of data from cross-national surveys, where the nonresponse model may also vary across the countries. The models are applied to analyse data on welfare attitudes in 29 countries in the European Social Survey.
Building theory about theory building: What constitutes a theoretical contribution? Academy of Management Review, , .

We distill existing literature on theoretical contribution into two dimensions, originality (incremental or revelatory) and utility (scientific or practical). We argue for a revision in the way scholars approach the utility dimension by calling for a view of theorizing that would enable theories with more “scope” (both scientific and practical utility). We also argue for an orientation toward “prescience” as a way of achieving scope and fulfilling our scholarly role of facilitating organizational and societal adaptiveness.
Indoor versus outdoor running: understanding how recreational exercise comes to inhabit environments through practitioner talk

Starting with a series of perspectives on why and where humans run, this paper considers how running comes to happen in some environments instead of others and how it is experienced thereafter. More specifically, we are interested in the processes by which contemporary recreational running has come to take place either indoors on treadmills or outside on pavements and paths. Running has been recently positioned as an obvious target for those hoping to encourage public health amongst increasingly time pressured populations and running outdoors can often lead to additional benefits. Yet how it is that runners and environments come to coalesce has yet to be examined in any great detail. This paper responds by drawing on theories of how embodied practices spread through society to further an emergent geographical interest in the speech patterns of everyday life. With reference to a project involving accompanied runs and interviews with groups of both indoor and outdoor recreational runners in London, we ask what the subtleties of their running talk tells us about how exercisers become attached to the environments they currently occupy and how they might feasibly be encouraged elsewhere.
The Vitreoretinal Interface in Retinal Vein Occlusions – A Clue for Surgery?

Retinal vein occlusions are still one of the leading retinal vasculopathies with a strong impact on the quality of life. Despite the success in symptomatic treatment with anti-vascular endothelial growth factor (VEGF) medication, no real causal therapy has been developed so far. As most of the pathogenetic changes have been observed in the vitreoretinal interface, actual therapeutic strategies are being focused on this area. Modern surgical techniques may help to release vitreovascular traction, stop cytokine activation and improve retinal oxygenation.
Moving beyond fan typologies: The impact of social integration on team loyalty in football

Abstract The purpose of this paper is to develop detailed insight into loyalty among football fans of Hibernian FC, moving beyond typologies to a more socially grounded approach. Issues explored include patterns of consumption, distinctions between fan groups, and antecedents of loyalty. The origins and development of the club are evaluated, and consumer fanaticism, football fan loyalty, consumption behaviour, and the sociological impact of fan communities are discussed. Data were collected using a variety of methods, including participant observation, in-depth interviews, and analysis of websites and fan forums. Key findings relate to the impact of family and community influences on loyalty, initial experiences of developing associations with the club, through to the impact of socialisation, and the lived experience of being a supporter. A supporter matrix is constructed as a portrayal of the loyalty found at the club. A range of theoretical implications is considered, and the matrix promoted as a tool for understanding loyalty in clubs with similar social structures and community connections.
Toward a Knowledge-Based Theory of the Firm,” Strategic Management Journal (17), pp.

Given assumptions about the characteristics of knowledge and the knowledge requirements of production, the firm is conceptualized as an institution for integrating knowledge. The primary contribution of the paper is in exploring the coordination mechanisms through which firms integrate the specialist knowledge of their members. In contrast to earlier literature, knowledge is viewed as residing within the individual, and the primary role of the organization is knowledge application rather than knowledge creation. The resulting theory has implications for the basis of organizational capability, the principles of organization design (in particular, the analysis of hierarchy and the distribution of decision-making authority), and the determinants of the horizontal and vertical boundaries of the firm. More generally, the knowledge-based approach sheds new light upon current organizational innovations and trends and has far-reaching implications for management practice.
Quantitation of left ventricular volumes and ejection fraction in post-infarction patients from biplane and single plane two-dimensional echocardiograms. A prospective longitudinal study of 371 patients.

AIMS To determine whether left ventricular volumes and ejection fractions calculated from single plane two-dimensional echocardiograms using the algorithm (0.85A2L) correlate with those calculated using the biplane Simpson's method, and whether small changes in volumes and ejection fraction occurring post-infarction could be detected from single-plane as well as from biplane two-dimensional echocardiograms. METHODS AND RESULTS Serial two-dimensional echocardiograms were obtained in 371 patients from the DEFIANT II trial a mean of 2 days, 1 week and 6 months post-infarction. Single plane volumes from the apical four chamber and apical long axis correlated closely with biplane Simpson's left ventricular volumes. Both single-plane left ventricular volumes significantly over-estimated biplane Simpson's volumes. Biplane Simpson's ejection fractions were consistently slightly under-estimated from the single-plane images. Differences between biplane Simpson's and single-plane volumes increased independently with increasing left ventricular size and distortion. The small changes in left ventricular volumes and ejection fraction over time were as reliably detected from single plane as from biplane images. CONCLUSION Single-plane left ventricular volumes over-estimate biplane Simpson's volumes and under-estimate ejection fraction, and these discrepancies are amplified in dilated hearts with abnormal shape.
The relationship between psychological factors and inquiry-based working by primary school teachers

Abstract Inquiry-based working by teachers includes working with an inquiry habit of mind, being data literate, contributing to a culture of inquiry at the school level, and creating a culture of inquiry at the classroom level. Inquiry-based working has been found to contribute to educational improvements and the professionalisation of teachers. This study investigates the relationship between psychological factors – attitude, experienced social pressure, self-efficacy and collective efficacy – and inquiry-based working by teachers. Questionnaire data were collected from a representative sample of 249 Dutch teachers. The results show a significant relationship between self-efficacy and all aspects of inquiry-based working. In addition, collective efficacy, attitude and experienced social pressure are all related to aspects of inquiry-based working. School leaders and teacher educators who aim to stimulate inquiry-based working should not only focus on increasing teachers’ inquiry skills, but also on psychological factors related to inquiry-based working.
The Core Density of Dark Matter Halos: A Critical Challenge to the ΛCDM Paradigm?

We compare the central mass concentration of cold dark matter (CDM) halos found in cosmological N-body simulations with constraints derived from the Milky Way disk dynamics and from the Tully-Fisher relation. For currently favored values of the cosmological parameters (Ω0 ~ 0.3; Λ0 = 1 - Ω0 ~ 0.7; h ~ 0.7; COBE- and cluster abundance-normalized σ8; big bang nucleosynthesis Ωb), we find that halos with circular velocities comparable to the rotation speed of the Galaxy have typically 3 times more dark matter inside the solar circle than inferred from observations of Galactic dynamics. Such high central concentrations of dark matter on the scale of galaxy disks also imply that stellar mass-to-light ratios much lower than expected from population synthesis models must be assumed in order to reproduce the zero point of the Tully-Fisher relation. Indeed, even under the extreme assumption that all baryons in a dark halo are turned into stars, disks with conventional I-band stellar mass-to-light ratios [M/LI ~ 2 ± 1(M/LI)☉] are about 2 mag fainter than observed at a given rotation speed. We examine several modifications to the ΛCDM model that may account for these discrepancies and conclude that agreement can only be accomplished at the expense of renouncing other major successes of the model. Reproducing the observed properties of disk galaxies thus appears to demand substantial revision to the currently most successful model of structure formation.
Impact of dose intensity on outcome of fludarabine, cyclophosphamide, and rituximab regimen given in the first-line therapy for chronic lymphocytic leukemia

Fludarabine-cyclophosphamide-rituximab is the most efficient first-line treatment for chronic lymphocytic leukemia patients. Many dose adjustments of the original MD Anderson Cancer Center regimen have been proposed. However, whether fludarabine-cyclophosphamide-rituximab relative dose intensity may have an impact on outcome has not yet been investigated. We retrospectively assessed relative dose intensity in 106 community-based patients included in our regional healthcare network from 2004-11, all receiving fludarabine-cyclophosphamide-rituximab as first-line treatment outside clinical trials. Dose reductions were observed in 51.4% of patients, mainly decided by the individual physician and not based on recommendations (52.7%), while there were fewer reports of toxicity or dose reduction because of impaired renal function. Progression-free survival was significantly reduced in patients who had a reduction in dose intensity of more than 20% in fludarabine-cyclophosphamide and/or rituximab. Multivariate analysis showed dose of rituximab had a significant impact on minimal residual disease and progression-free survival. Although prophylactic granulocyte-colony stimulating factor significantly reduced the rate of grade 3-4 neutropenia and febrile neutropenia, it had no impact on relative dose intensity and outcome. This study shows that, in routine clinical practice, there is low adherence to the original MD Anderson Cancer Center fludarabine-cyclophosphamide-rituximab schedule, and that the decision to modify dosage was mostly taken by the individual physician and was based on anticipated toxicity. This study shows that reduction of fludarabine-cyclophosphamide and, more importantly, of rituximab doses seriously interferes with progression-free survival.
Why did Sudicky [1986] find an exponential‐like spatial correlation structure for hydraulic conductivity at the Borden research site?

The exponential‐like spatial correlation structure for hydraulic conductivity that Sudicky (1986) found at the Borden research site arises from hierarchical sedimentary architecture. The sediments can be described in terms of a hierarchy of stratal unit types wherein larger‐scale unit types (hierarchical level II) are composed of smaller‐scale unit types (hierarchical level I). There is a hierarchy of permeability populations corresponding to this stratal hierarchy. The shape and effective range of the composite semivariogram is mostly defined by how the proportion of lag transitions crossing these unit types grows as a function of lag distance. Lag transitions across level I units but within the same level II unit type and transitions across level II unit types contribute about equally in defining the composite sample semivariogram in the vertical direction. These two types of cross transitions have shorter and longer length scales, respectively. The composite semivariogram reflects additive contributions from the two length scales. The proportion of cross‐transition lags grows with an exponential‐like curve because the unit types at either level reoccur with a relatively high variability in length. The shape and range of the semivariogram are modeled from knowing only the univariate statistics for length among the unit types, and the sill is modeled from knowing univariate statistics for hydraulic conductivity populations among the unit types. Understanding the relationship between the semivariogram structure and these quantifiable attributes of the hierarchical stratal architecture helps in reducing the equivocal aspects of choosing a semivariogram model. It also helps in identifying bias in sample semivariograms and in assessing stationarity of second‐order spatial bivariate statistics.
Internet Addiction Based on Personality Characteristics of High School Students in Kerman, Iran

Background The new phenomenon of Internet addiction among teenagers and young adults is one of the modern addictions in industrial and post-industrial societies. The purpose of this research was to predict the Internet addiction based on the personality characteristics of high school students in Kerman. Methods This research was a descriptive correlational study. The statistical population included 538 male and female students in the second grade of high school in Kerman during 2010. The subjects were randomly selected by multistage clustering. Data was collected by two questionnaires including the five-factor Revised NEO Personality Inventory and the Internet dependency questionnaire. The data was analyzed using ANOVA test and multivariable regression analysis. Findings The findings showed a significant relationship between the personality trait of emotional stability and academic fields, i.e. students with higher emotional stability experience less negative emotions when confronting with problems. Therefore, it is less likely for them to alleviate the negative emotions by the extreme and obsessed usage of the Internet. In addition, it appears that the students with high extroversion scores prefer social, face to face interactions with other people to interaction with the virtual world. Conversely, more introvert students avoid interactions with other people due to their shyness. Thus, they communicate with the virtual world more. Conclusion Three personality traits of loyalty, emotional stability, and extroversion are the most significant predictors of Internet addiction in high school students.
Benchmarking machine learning techniques for the extraction of protein-protein interactions from text

Accurately extracting information from text is a challenging discipline because of the complexity of natural language. We have studied state-of-the art systems that extract biological relations from research articles. It has become clear that this field is still struggling with a heterogeneous collection of data sets, data formats and evaluation methods. While recent developments look promising, there is still plenty of room for improvement.
‘It’s a man’s man’s man’s world’: Music groupies and the othering of women in the world of rock

Groupies are understood as a particular type of fan that are most commonly associated with rock music. The ‘groupie’ identity is almost exclusively applied to female fans but sometimes also to female music producers and is largely used in a derogatory manner both by the popular media and by fans themselves. This article argues that the ‘groupie’ identity is used to ‘other’ and exclude women from creative production in rock music. This study draws on a rhetorical analysis of five published biographical accounts of groupies to examine how the labeling of certain people as ‘groupies’ works as an othering practice that serves to support and maintain the gendered norms of rock and identifies three underlying discursive processes. First, popular and music media played a significant role in stereotyping groupie as female right from the emergence of the label. Second, the notions of ‘credibility’ and ‘authenticity’, which are central to serious music journalism, are constructed in such a way as to stigmatize and therefore exclude women from rock, primarily by reframing ‘groupies’ as inauthentic consumers rather than proper fans. Finally, the intertwining of femininity with fandom, as occurs in groupiedom, serves to magnify cultural assumptions about women as sex objects and as passive consumers of mass culture. In elucidating both the gender and marketplace role politics at play in the ‘groupie’ identity and the mechanisms involved in othering women, space is opened in which alternative possibilities for understanding and enacting the role of women in rock can be imagined.