Miracle-dz/UniFAR-FTUs huggingface dataset:
Multiband magnetism and superconductivity in Fe-based compounds

Recent discovery of superconductivity in Fe-based layered compounds may have opened a new pathway to the room temperature superconductivity. A model Hamiltonian describing FeAs layers is introduced, highlighting the crucial role of puckering of As atoms in promoting d electron itinerancy and warding off large local-moment magnetism of Fe ions, the main enemy of superconductivity. Quantum many-particle effects in charge, spin and multiband channels are explored and a nesting-induced spin density-wave order is found in the parent compund. We argue that this largely itinerant antiferromagnetism and high Tc itself are essentially tied to the multiband nature of the Fermi surface.
Chemical abundances of late-type pre-main sequence stars in the σ Orionis cluster

Context. The young σ Orionis cluster is an important location for studying the formation and evolution of stars, brown dwarfs, and planetary-mass objects. Its metallicity, although it is a fundamental parameter, has not been well determined yet. Aims. We present the first determination of the metallicity of nine young late-type stars in σ Orionis. Methods. Using the optical and near-infrared broadband photometry available in the literature we derive the effective temperatures for these nine cluster stars, which lie in the interval 4300–6500 K (1–3 M� ). These parameters are employed to compute a grid of synthetic spectra based on the code MOOG and Kurucz model atmospheres. We employ a χ 2 -minimization procedure to derive the stellar surface gravity and atmospheric abundances of Al, Ca, Si, Fe, Ni and Li, using multi-object optical spectroscopy taken with WYFFOS+AF2 at the William Herschel Telescope (λ/δλ ∼ 7500). Results. The average metallicity of the σ Orionis cluster is [Fe/H] = −0.02 ± 0.09 ± 0.13 (random and systematic errors). The abundances of the other elements, except lithium, seem to be consistent with solar values. Lithium abundances are in agreement with the “cosmic” 7 Li abundance, except for two stars which show a log � (Li) in the range 3.6–3.7 (although almost consistent within the error bars). There are also other two stars with log � (Li) ∼ 2.75. We derived an average radial velocity of the σ Orionis cluster of 28 ± 4k m s −1 . Conclusions. The σ Orionis metallicity is roughly solar.
How social software supports cooperative practices in a globally distributed software project

In Global Software Development (GSD), the lack of face- to-face communication is a major challenge and effective computer-mediated practices are necessary. This paper analyzes cooperative practices supported by Social Software (SoSo) in a GSD student project. The empirical results show that the role of SoSo is to support informal communication, enabling social talks and metawork, both necessary for establishing and for maintaining effective coordination mechanisms, thus successful cooperation.
FROM TOY AND TOOL TO PARTNER AND PERSON: PHENOMENAL CONVERGENCE/DIVERGENCE AMONG GAME AVATAR METAPHORS

Although avatars broadly include textual screen names or social network profiles, we specifically discuss here the two- or three-dimensional graphic bodies representing players in online games. Emerging perspectives on player-avatar relations suggest that avatar metaphors may be integrated into a comprehensive framework to foster synthesis of avatar characterizations (Authors, 2014). In particular, the notion of player-avatar sociality (Authors, 2015a) suggests that players variably relate to their avatars along a continuum, from a) non-social relations (avatars are mere objects) to b) parasocial relationships (avatars are player extensions; see Authors, 2008), to c) fully social relationships (avatars are autonomous partners in play). The notion of sociality – the degree to which players relate to avatars as they would relate to other people – ostensibly subsumes a range of more discrete avatar metaphors.
Relationship between fluid loss variation and physical activity during official games in elite soccer players. [Relaciones entre la variación de pérdida de líquidos y la actividad física durante partidos oficiales en jugadores de fútbol de élite].

espanolEl objetivo del presente estudio consistio en analizar las relaciones entre la ingesta de liquidos, cambios en la composicion corporal y en la actividad fisica en jugadores de elite. La muestra estaba compuesta por 32 jugadores franceses de elite divididos en seis posiciones de juego: porteros (P), defensas centrales (DC), laterales (L), mediocentros (M), Extremos (E) y delanteros (D). Se registraron en dos partidos amistosos jugados en la pretemporada. Los cambios en composicion corporal y la ingesta de liquidos se realizaron antes, durante y despues de los partidos. Los datos sobre rendimiento fisico tambien fueron registrados. Los jugadores tomaron 1.4±0.6 L de liquidos durante los partidos y perdieron 1.4±0.6 L al terminar los mismos. Los E perdieron mas peso que los P, L y D (p EnglishThe aim of the present study was to analyse the relationships between fluid ingestion, changes in body mass and physical activity amongst elite soccer players. 32 elite French soccer players were divided into six playing positions: goalkeepers (GK), central defenders (CD), full backs (FB), central midfielders (CM), wide midfielders (WM) and forwards (FW) and participated in official friendly matches within two consecutive pre-season periods. Body mass changes and fluid ingestion were recorded before, during and just after the matches. Time-motion characteristics were also analysed. Players ingested 1.4±0.6 L of fluids during matches and lost 1.4±0.6 kg at the end of the games. WM lost more weight than GK, FB and FW (p As a result, sweat lost may be more influenced by HI activity during a game than other physical activity within game scenarios. Therefore, players with the highest amount of HI activities during a match should even more pay attention to their rehydration.
Transformational Leadership, Transactional Leadership, and Employee Creativity in Entrepreneurial Firms

Drawing on organismic integration theory, we propose that transformational leadership and transactional leadership are most likely to predict outcomes, under uncertain social contexts, when accompanied by organizational financial and nonfinancial rewards. Using survey data from professional employees and their supervisors, from 260 Chinese enterprises, with less than 5 years of entrepreneurial experience, we found that (1) transformational leadership is not significantly related to employee creativity, while transactional leadership is positively related to followers’ creative behaviors, (2) synergy between transformational leadership and financial rewards and between transactional leadership and nonfinancial rewards accentuate the effect on employee creativity respectively, (3) psychological empowerment fully mediates the aforementioned relationship. These findings offer a new theoretical framework for future theory development of leadership.
Trust-Based Recommendation: An Empirical Analysis

The use of trust in recommender systems has been shown to im- prove the accuracy of rating predictions, especially in the case where a user’s rating significantly differs from the average. Different techniques have been used to incorporate trust into recommender systems, each showing encouraging results. However, the lack of trust information available in public datasets has limited the empir- ical analysis of these techniques and trust-based recommendation in general, with most analysis limited a single dataset. In this paper, we provide a more complete empirical analysis of trust-based recommendation. By making use of a method that infers trust between users in a social graph, we are able to apply trust-based recommendation techniques to three separate datasets. From this, we measure the overall accuracy of each technique in terms of the Mean Absolute Error (MAE), the Root Mean Square Error (RMSE) as well as measuring the prediction coverage of each technique. We thus provide a comparison and analysis of each tech- nique on all three datasets.
Cysteine Catabolism: A Novel Metabolic Pathway Contributing to Glioblastoma Growth

The relevance of cysteine metabolism in cancer has gained considerable interest in recent years, largely focusing on its role in generating the antioxidant glutathione. Through metabolomic profiling using a combination of high-throughput liquid and gas chromatography–based mass spectrometry on a total of 69 patient-derived glioma specimens, this report documents the discovery of a parallel pathway involving cysteine catabolism that results in the accumulation of cysteine sulfinic acid (CSA) in glioblastoma. These studies identified CSA to rank as one of the top metabolites differentiating glioblastoma from low-grade glioma. There was strong intratumoral concordance of CSA levels with expression of its biosynthetic enzyme cysteine dioxygenase 1 (CDO1). Studies designed to determine the biologic consequence of this metabolic pathway identified its capacity to inhibit oxidative phosphorylation in glioblastoma cells, which was determined by decreased cellular respiration, decreased ATP production, and increased mitochondrial membrane potential following pathway activation. CSA-induced attenuation of oxidative phosphorylation was attributed to inhibition of the regulatory enzyme pyruvate dehydrogenase. Studies performed in vivo abrogating the CDO1/CSA axis using a lentiviral-mediated short hairpin RNA approach resulted in significant tumor growth inhibition in a glioblastoma mouse model, supporting the potential for this metabolic pathway to serve as a therapeutic target. Collectively, we identified a novel, targetable metabolic pathway involving cysteine catabolism contributing to the growth of aggressive high-grade gliomas. These findings serve as a framework for future investigations designed to more comprehensively determine the clinical application of this metabolic pathway and its contributory role in tumorigenesis.
Electromagnetic Scattering in a Discrete Basis

Accurate and efficient solutions to scattering problems are essential to many areas of electromagnetic research. In this volume, the mode-matching technique is used to solve scattering problems in eddy-current nondestructive evaluation, thin-film deposition, and nanophotonics. In addition to being fast and accurate, the discrete eigenfunction solutions provide insight into the physics of each problem. After establishing the validity of discrete eigenfunction expansions for geometries of finite extent, the author derives an expression for the impedance of a tangential eddy-current coil in the presence of an infinite conducting wedge of arbitrary angle. The solution herein obviates the difficulties associated with continuous eigenfunction expansions by solving the problem in a truncated domain. A modal approximation to the fields inside an electrically small plasma reactor is presented. The author describes how the uniformity of the film deposition could be improved by coating the walls of the reactor with a lossy material. The book concludes with a modal solution to plane-wave scattering by a thin silver film perforated by a square array of circular holes.
The underlying dimensionality of people's implicit job theories across cognitive sets : implications for comparable worth /

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On the stability of Broadwell shocks

Introduction We study the asymptotic behavior of perturbations of traveling shock waves of the Broadwell model, Gamma @ @t + @ @x Delta f + = f 2 0 Gamma f + f Gamma ; x 2 R I 1 ; t ? 0; @ @t f 0 = Gamma 1 2 (f 2 0 Gamma f + f Gamma ); (1:1a) Gamma @ @t Gamma @ @x Delta f Gamma = f 2 0 Gamma f + f Gamma ; with initial data (1:1b) (f + ; f 0 ; f Gamma )(Delta; 0) = f I (Delta) ;
The transcription factor NRSF contributes to epileptogenesis by selective repression of a subset of target genes

The mechanisms generating epileptic neuronal networks following insults such as severe seizures are unknown. We have previously shown that interfering with the function of the neuron-restrictive silencer factor (NRSF/REST), an important transcription factor that influences neuronal phenotype, attenuated development of this disorder. In this study, we found that epilepsy-provoking seizures increased the low NRSF levels in mature hippocampus several fold yet surprisingly, provoked repression of only a subset (∼10%) of potential NRSF target genes. Accordingly, the repressed gene-set was rescued when NRSF binding to chromatin was blocked. Unexpectedly, genes selectively repressed by NRSF had mid-range binding frequencies to the repressor, a property that rendered them sensitive to moderate fluctuations of NRSF levels. Genes selectively regulated by NRSF during epileptogenesis coded for ion channels, receptors, and other crucial contributors to neuronal function. Thus, dynamic, selective regulation of NRSF target genes may play a role in influencing neuronal properties in pathological and physiological contexts. DOI: http://dx.doi. org/10.7554/eLife.01267. 001
Fourier meets möbius: fast subset convolution

We present a fast algorithm for the subset convolution problem:given functions <i>f</i> and <i>g</i> defined on the lattice of subsets of an<i>n</i>-element set <i>n</i>, compute their subset convolution f*g, defined for S⊆ N by [ (f * g)(S) = [T ⊆ S] f(T) g(S/T),,]where addition and multiplication is carried out in an arbitrary ring. Via Möbius transform and inversion, our algorithm evaluates the subset convolution in O(n<sup>2</sup> 2<sup>n</sup>) additions and multiplications, substanti y improving upon the straightforward O(3<sup>n</sup>) algorithm. Specifically, if the input functions have aninteger range [-M,-M+1,. ,M], their subset convolution over the ordinary sum--product ring can be computed in Õ(2<sup>n</sup> log M) time; the notation Õ suppresses polylogarithmic factors.Furthermore, using a standard embedding technique we can compute the subset convolution over the max--sum or min--sum semiring in Õ(2<sup>n</sup> M) time. To demonstrate the applicability of fast subset convolution, wepresent the first Õ(2<sup>k</sup> n<sup>2</sup> + n m) algorithm for the Steiner tree problem in graphs with <i>n</i> vertices, <i>k</i> terminals, and <i>m</i> edges with bounded integer weights, improving upon the Õ(3<sup>k</sup>n + 2<sup>k</sup> n<sup>2</sup> + n m) time bound of the classical Dreyfus-Wagner algorithm. We also discuss extensions to recent Õ(2<sup>n</sup>)-time algorithms for covering and partitioning problems (Björklund and Husfeldt, FOCS 2006; Koivisto, FOCS 2006).
Trajectory Tracking and Consensus of Networks of Euler-Lagrange Systems

Abstract This paper addresses the problem of synchronizing networks of nonidentical, nonlinear dynamical systems described by Euler–Lagrange equations. It is assumed that the communication graph is simply connected and that the systems are fully actuated, with their states available for measurement. The communications can be subject to constant time-delays. The main result of the paper is a controller for each system in the network, capable of tracking a desired trajectory and, if such trajectory does not exist, capable of reaching a network consensus. Moreover, it is proved that, if there are no time-delays and the graph is balanced each system reaches a consensus arbitrarily near the average of the initial conditions of all the systems in the network. Simulations using a ten robot manipulator network with different time-delays are provided.
The Hasford Score May Predict Molecular Response in Chronic Myeloid Leukemia Patients: A Single Institution Experience

The Sokal, Hasford, and EUTOS scores were established in different treatment eras of chronic myeloid leukemia (CML). None of them was reported to predict molecular response. In this single center study we tried to reevaluate the usefulness of three main scores in TKI era. The study group included 88 CML patients in first chronic phase treated initially with standard imatinib dose. All of them achieved major molecular response (MMR) in time points defined by European LeukemiaNet (ELN). 42 patients lost MMR in a median time of 47 months and we found a significant difference in MMR maintenance between intermediate-risk (IR) and low-risk (LR) patients assessed by Hasford score. All 42 patients were switched to second-generation TKI (2G-TKI) treatment. At 18 months of 2G-TKI therapy we have still found a significant difference in BCR-ABL transcript levels and MMR rate between IR and LR groups. We did not find any of the described differences discriminating patients by Sokal or EUTOS score. In this retrospective single center analysis we found Hasford score to be useful in predicting molecular response in first chronic phase of CML patients.
Impact of supplementing newborn infants with vitamin A on early infant mortality: community based randomised trial in southern India

Abstract Objective To assess the impact of supplementing newborn infants with vitamin A on mortality at age 6 months. Design Community based, randomised, double blind, placebo controlled trial. Setting Two rural districts of Tamil Nadu, southern India. Participants 11 619 newborn infants allocated 24 000 IU oral vitamin A or placebo on days 1 and 2 after delivery. Main outcome measure Primary outcome measure was mortality at age 6 months. Results Infants in the vitamin A group had a 22% reduction in total mortality (95%confidence interval 4% to 37%) compared with those in the placebo group. Vitamin A had an impact on mortality between two weeks and three months after treatment, with no additional impact after three months. Conclusion Supplementing newborn infants with vitamin A can significantly reduce early infant mortality.
Deficiency of Myeloperoxidase Increases Infarct Volume and Nitrotyrosine Formation in Mouse Brain

Peroxynitrite is responsible for nitration in vivo, whereas myeloperoxidase can also catalyze protein nitration in the presence of high NO2− levels. Recent reports of myeloperoxidase-mediated enzyme inactivation or lipid peroxidation have suggested a role of myeloperoxidase in various pathological conditions. To clarify the role of myeloperoxidase in ischemic brain injury, the authors measured nitrotyrosine formation and infarct volume in myeloperoxidase-deficient or wild-type mice subjected to 2-hour focal cerebral ischemia-reperfusion. Twenty-four hours after reperfusion, infarct volume was significantly larger in myeloperoxidase-deficient mice than in wild-type mice (81 ± 20 mm3 vs. 52 ± 13 mm3, P < 0.01), and nitrotyrosine levels in the infarct region were higher in myeloperoxidase-deficient mice than in wild-type mice (13.4 ± 6.1 μg/mg vs. 9.8 ± 4.4 μg/mg, P = 0.13). Fourteen hours after reperfusion, the nitrotyrosine level was significantly higher in myeloperoxidase-deficient mice than in wild-type mice (3.3 ± 2.9 μg/mg vs. 1.4 ± 0.4 μg/mg, P < 0.05). The authors conclude that the absence of myeloperoxidase increases ischemic neuronal damage in vivo, and that the myeloperoxidase-mediated pathway is not responsible for the nitration reaction in cerebral ischemia-reperfusion.
High-resolution analysis of genetic stability of human adipose tissue stem cells cultured to senescence

The potential use of human mesenchymal stem cells for therapeutic applications implies large scale in vitro culture, increasing the probability of genetic instability and transformation. We examine here the incidence of unbalanced and balanced chromosome rearrangements in polyclonal and single cell‐derived cultures of human adipose stem cells to senescence. G‐banding karyotyping of the polyclonal cultures shows a normal karyotype. In addition, high‐resolution microarray‐based comparative genomic hybridization analyses relative to uncultured adipose stem cells from the same donors reveal overall genomic stability in long‐term (∼6 months) polyclonal and clonal culture. One adipose stem cell clone displayed minor deletions in gene‐rich telomeric and sub‐telomeric regions on three chromosomes in early passage. This however, was detected only in a sub‐population of cells that was subsequently spontaneously eliminated from the culture. Apparent pericentromeric instabilities are also occasionally detected in specific chromosomes. Our results indicate that clonal chromosomal aberrations may arise transiently in early passage adipose stem cells (ASC) cultures. Nonetheless, incidence of these aberrations seems to be negligible in the majority of long‐term ASC cultures, at least under the culture conditions used here.
Differential analysis of nonlinear systems: Revisiting the pendulum example

Differential analysis aims at inferring global properties of nonlinear behaviors from the local analysis of the linearized dynamics. The paper motivates and illustrates the use of differential analysis on the nonlinear pendulum model, an archetype example of nonlinear behavior. Special emphasis is put on recent work by the authors in this area, which includes a differential Lyapunov framework for contraction analysis [24], and the concept of differential positivity [25].
Diabetic Complications in Obese Type 2 Diabetic Rat Models

We overviewed the pathophysiological features of diabetes and its complications in obese type 2 diabetic rat models: Otsuka Long-Evans Tokushima fatty (OLETF) rat, Wistar fatty rat, Zucker diabetic fatty (ZDF) rat and Spontaneously diabetic Torii (SDT) fatty rat. Pancreatic changes with progression of diabetes were classified into early changes, such as islet hypertrophy and degranulation of β cells, and degenerative changes, such as islet atrophy and fibrosis of islet with infiltration of inflammatory cells. Renal lesions in tubuli and glomeruli were observed, and nodular lesions in glomeruli were notable changes in OLETF and SDT fatty rats. Among retinal changes, folding and thickening were interesting findings in SDT fatty rats. A decrease of motor nerve conduction velocity with progression of diabetes was presented in obese diabetic rats. Other diabetic complications, osteoporosis and sexual dysfunction, were also observed. Observation of bone metabolic abnormalities, including decrease of osteogenesis and bone mineral density, and sexual dysfunction, including hypotestosteronemia and erectile dysfunction, in obese type 2 diabetic rats have been reported.