Miracle-dz/UniFAR-FTUs huggingface dataset:
Gentle algebras arising from surface triangulations

In this paper, we associate an algebra A(T) to a triangulation T of a surface S with a set of boundary marking points. This algebra A(T) is gentle and Gorenstein of dimension one. We also prove that A(T) is cluster-tilted if and only if it is cluster-tilted of type A or A tilde, or if and only if the surface S is a disc or an annulus. Moreover all cluster-tilted algebras of type A or A tilde are obtained in this way.
An automatic topic ranking approach for event detection on microblogging messages

Microblog is a social network service which is able to aggregate messages to explore new knowledge. Nowadays, more and more users contribute what they found and what they thought by posting short messages. This phenomenon makes people spend lots of time monitoring text streams of microblogging messages, in order for acquisition of information regarding real-time events and news. In this work, we adopted several algorithms for mining topics on microblogs, and developed a novel algorithm for ranking topics and messages on microblogs. The developed ranking solution is expected to assist people to quickly identify emerging topics and events which might yield the most recently trending topics, with the hope to effectively resolve the information overload.
Increase in the Number of Tuberculosis Cases Treated following Tuberculin Skin Testing in First-Year Schoolchildren in Madagascar

Background Tuberculosis continues to cause unacceptably high levels of disease and death worldwide. Active preventive strategies are required to improve tuberculosis control and to increase the number of cases treated in developing countries. The aim of this study was to evaluate the utility of the tuberculin skin test (TST) in first-year schoolchildren as a means of increasing the number of tuberculosis cases detected through the screening of close contacts. Methods All members of the households of 90 schoolchildren assigned to three groups on the basis of TST category (≤5 mm, [5–15)mm, ≥15 mm) were screened for sputum smear-positive pulmonary tuberculosis. The percentage detection of tuberculosis in close contacts was compared between TST categories. Results We identified 433 close contacts of the 90 schoolchildren, who were then evaluated for tuberculosis. We identified 11 cases of pulmonary tuberculosis among the close contacts (7 already on treatment and 4 previously undiagnosed): 0 in TST category ≤5 mm, 3 in TST category [5–15) mm and 8 in TST category ≥15 mm). This approach increased the detection of tuberculosis cases by a factor of 1.6 in first-year schoolchildren of the TST ≥5 mm group. Conclusion TST in first-year schoolchildren is a potentially effective method for improving the detection of tuberculosis in close contacts.
IgG 4-related Sclerosing Disease of the Lung without Pancreas Involvement : Presentation on 18 F-FDG PET / CT

IgG4-related sclerosing disease is a rare disease which received attention only recently. We present a case of IgG4-related sclerosing disease of lung without signs of pancreas involvement and report the unusual image findings that have not been reported. It presented as a pulmonary nodule having low 18Fluorinefluorodeoxyglucose (FDG)
A System for Capturing High Resolution Images

In this paper an Automatic System for Image Digital Capturing (ASIDC) is described. The aim of ASIDC is to create high resolution digital images depicting paintings of large size. The system creates a set of N digital images presenting sequential frames of the total picture. By using software we proceed to the mosaicing (pasting) of the images producing the complete detailed digital image.
Allergic Fungal Sinusitis in Children

Described first in 1980s, allergic fungal sinusitis that is a chronic noninvasive fungal sinusitis is a relatively uncommon disease in adults. Nasal polyposis, peculiar imaging features, and allergic mucin are its main characteristics. Although case report and/or series about this disease have been reported, its occurrence in pediatric population remains rare. Pathogenesis of this illness is the same in both children and adults, but some clinical characteristics are different, especially at presentation. The clinical picture and treatment of this disorder in children are analyzed.
Plank problems, polarization and Chebyshev constants

In this work we discuss "plank problems" for complex Banach spaces and in particular for the classical spaces. In the case we obtain optimal results and for finite dimensional complex Banach spaces, in a special case, we have improved an early result by K. Ball [3]. By using these results, in some cases we are able to find best possible lower bounds for the norms of homogeneous polynomials which are products of linear forms. In particular, we give an estimate in the case of a real Hilbert space which seems to be a difficult problem. We have also obtained some results on the so-called n-th (linear) polarization constant of a Banach space which is an isometric property of the space. Finally, known polynomial inequalities have been derived as simple consequences of various results related to plank problems.
Maintenance and Manipulation in Working Memory : Differential Ventral and Dorsal Frontal Cortex fMRI Activity

A verbal working memory protocol was designed and evaluated on a group of healthy younger adults in preparation for a large-scale functional magnetic resonance (fMRI) study on aging and memory. Letters were presented in two critical conditions: (i) maintenance, in which letters were to be memorized and kept in mind over a four second interval, and (ii) manipulation, in which letters were shifted forward in alphabetical order, and the new order was kept in mind. Analyses of fMRI data showed that the protocol elicited reliable activation in the frontal cortex, with manipulation producing more extensive activation patterns, both in whole-brain analyses and in predefined regions of interest (ROIs). There was also a distinction between dorsal and ventral lateral prefrontal regions, such that manipulation elicited more dorsolateral prefrontal activation. The protocol also elicited activation in various subcortical areas, previously associated with working-memory tasks. It was concluded that this working memory protocol is appropriate for investigating age-related changes in frontal-cortex functioning.
Aprender a pesquisar : desafios da construção de um saber informacional na educação a distância

O artigo discute o papel do ambiente de aprendizagem virtual, constituido de informacoes e espaco de trocas de experiencias, destinado a apropriacao de processos e praticas de pesquisa, por educadores que atuam em contextos de educacao nao formal. Analisa novas abordagens acerca da pratica da pesquisa na construcao de conhecimento e diferentes dispositivos nao presenciais voltados ao Aprender a Pesquisar, categoria que integra questoes tratadas pela Infoeducacao. O objeto empirico da investigacao foi desenvolvido no âmbito das acoes da Estacao do Conhecimento Einstein, dispositivo cultural, implantado sob a orientacao do Colaboratorio de Infoeducacao – ColaborI -, da Escola de Comunicacoes e Artes, da Universidade de Sao Paulo. Conclui que a concomitância entre a realizacao de oficinas presenciais de aprendizagem da pesquisa e os dispositivos virtuais de aprender a pesquisar e um caminho a ser conquistado para a criacao de condicoes favoraveis a autonomia e participacao dos educadores nesse campo.
Assessing activity participation in the ACL injured population: a systematic review of activity rating scale measurement properties

Abstract Background: Participation is an important factor in assessing both the requirement for and outcome from anterior cruciate ligament reconstruction. Many patient-reported rating scales exist; however, measurement properties have not been well established. Objective: To provide a systematic review to identify currently available activity rating scales for anterior cruciate ligament injured subjects and to evaluate current knowledge of their measurement properties. Methods: Systematic searches of four databases (Medline, AMED, EMBASE, and CINAHL) without date or language restriction, using terms structured around the PICOS system were completed on 1st March 2011. Citation tracking, reference screening and contact with lead authors of key papers completed the search strategy. Studies using participation rating scales were identified to assess frequency of reporting and cited validation. Studies assessing one or more psychometric properties of the identified rating scales were subject to independent data extraction and critical appraisal by two independent authors using published tools. Results: Thirty-one rating scales were identified from 241 outcome studies. Most scales were inadequately developed or validated prior to use. Only three scales (Tegner, CSAS, and Marx) had psychometric analysis in eight studies of mixed quality. Only the Tegner scale has adequate assessment of reliability, validity, and responsiveness. The use of type, intensity, and frequency variables in the identified scales is discussed. Conclusions: The Tegner scale has been adequately validated; however, other rating scales require further validation. A comprehensive comparative analysis of clinical applicability and psychometric testing of existing scales, including clinically useful statistics, is required.
Enhancing SURF Feature Matching Using Colour Histograms

A strategy is proposed that enhances the local feature matching capabilities of the SURF descriptor by utilising colour histograms. The results compare variations of the RGB, HSV and Opponent colour spaces on a dataset of image pairs that undergo illumination, viewpoint and translational changes. This study finds the most appropriate colour space that enhances the distinctiveness of a descriptor when applied to the matching of corresponding features in arbitrary image sets.
Iron Acquisition and Metabolism by Mycobacteria

Iron is a prerequisite for in vitro growth of mycobacteria.Iron is an obligate cofactor for at least 40 different enzymes encoded in the Mycobacterium tuberculosis genome ([8][1]). It is required for the cytochromes involved in electron transport and other hemoproteins involved in oxygen metabolism
Homeostatic Synapse-Driven Membrane Plasticity in Nucleus Accumbens Neurons

Stable brain function relies on homeostatic maintenance of the functional output of individual neurons. In general, neurons function by converting synaptic input to output as action potential firing. To determine homeostatic mechanisms that balance this input–output/synapse–membrane interaction, we focused on nucleus accumbens (NAc) neurons and demonstrated a novel form of synapse-to-membrane homeostatic regulation, homeostatic synapse-driven membrane plasticity (hSMP). Through hSMP, NAc neurons adjusted their membrane excitability to functionally compensate for basal shifts in excitatory synaptic input. Furthermore, hSMP was triggered by synaptic NMDA receptors (NMDARs) and expressed by the modification of SK-type Ca2+-activated potassium channels. Moreover, hSMP in NAc neurons was abolished in rats during a short- (2 d) or long- (21 d) term withdrawal from repeated intraperitoneal injections of cocaine (15 mg/kg/d, 5 d). These results suggest that hSMP is a novel form of synapse-to-membrane homeostatic plasticity and dysregulation of hSMP may contribute to cocaine-induced cellular alterations in the NAc.
Monocular SLAM with locally planar landmarks via geometric rao-blackwellized particle filtering on Lie groups

We propose a novel geometric Rao-Blackwellized particle filtering framework for monocular SLAM with locally planar landmarks. We represent the states for the camera pose and the landmark plane normal as SE(3) and SO(3), respectively, which are both Lie groups. The measurement error is also represented as another Lie group SL(3) corresponding to the space of homography matrices. We then formulate the unscented transformation on Lie groups for optimal importance sampling and landmark estimation via unscented Kalman filter. The feasibility of our framework is demonstrated via various experiments.
Combination of Microfluidic Loop-Mediated Isothermal Amplification with Gold Nanoparticles for Rapid Detection of Salmonella spp. in Food Samples

Foodborne diseases are an important cause of morbidity and mortality. According to the World Health Organization, there are 31 main global hazards, which caused in 2010 600 million foodborne illnesses and 420000 deaths. Among them, Salmonella spp. is one of the most important human pathogens, accounting for more than 90000 cases in Europe and even more in the United States per year. In the current study we report the development, and thorough evaluation in food samples, of a microfluidic system combining loop-mediated isothermal amplification with gold nanoparticles (AuNPs). This system is intended for low-cost, in situ, detection of different pathogens, as the proposed methodology can be extrapolated to different microorganisms. A very low limit of detection (10 cfu/25 g) was obtained. Furthermore, the evaluation of spiked food samples (chicken, turkey, egg products), completely matched the expected results, as denoted by the index kappa of concordance (value of 1.00). The results obtained for the relative sensitivity, specificity and accuracy were of 100% as well as the positive and negative predictive values.
Oscillation Damping Enhancement via Coordinated Design of PSS and FACTS-Based Stabilizers in a Multi-Machine Power System Using PSO

This paper investigates the enhancement of power system stability via coordinated design of Power System Stabilizers PSSs, Thyristor Controlled Series Capacitor TCSC-based stabilizer, and Static Var Compensator SVC-based stabilizer in a multi-machine power system. The design problem of the proposed stabilizers is formulated as an optimization problem. Using the developed linearized power system model, the particle swarm optimization PSO algorithm is employed to search for optimal stabilizer settings that maximize the minimum damping ratio of all system oscillating modes. The proposed stabilizers are evaluated on a two-area weakly-connected multi-machine power system with unstable interarea oscillation mode. The nonlinear simulation results and eigenvalue analysis show the effectiveness of the proposed coordinated stabilizers in damping low frequency power system oscillations and enhancing the system stability.
Effect of Staining Procedures on the Results of Micronucleus Assays with Exfoliated Oral Mucosa Cells

Micronuclei in exfoliated epithelial cells are widely used as biomarkers of cancer risk in humans. To elucidate the effect of different staining procedures on the outcome of such investigation, we conducted a study in which the micronuclei frequencies in oral mucosa cells of heavy smokers (n = 20) and nonsmokers (n = 10) were evaluated with nonspecific (Giemsa, May-Grünwald-Giemsa) and DNA-specific (4′,6-diamidino-2-phenylindole, Feulgen, acridine orange) stains, whereas with Giemsa-based stains, the frequencies of micronuclei in smokers were significantly (4- to 5-fold) higher in the smokers group, no significant increase was observed with any of the DNA-specific stains. Furthermore, the evaluation of cells of the two study groups with Feulgen stain showed that oral mucosa cells from smokers had significantly increased levels of nuclear anomalies other than micronuclei. These anomalies are consequences of cell injury found in epithelial cells and are paralleled by formation of keratin bodies in the cytoplasm that resemble micronuclei. Correlation analyses showed that micronuclei frequencies scored in Giemsa-stained slides correlated significantly with karyorrhexis, karyolysis, condensed chromatin, and binucleates, whereas no such correlations were found with DNA-specific stains. These findings indicate that nuclear anomalies (and possibly keratin bodies) may be misinterpreted as micronuclei with nonspecific DNA stains and lead to false-positive results in studies with cells of epithelial origin. Furthermore, our results show that exposure of oral mucosa cells to genotoxic carcinogens contained in tobacco smoke does not lead to induction of micronuclei in these cells. (Cancer Epidemiol Biomarkers Prev 2006;15(10):1835–40)
Energy-efficient power allocation for secure communications in wireless powered massive MIMO relaying systems

In this paper, we address the problem of energy-efficient power allocation for secure communications in wireless powered relaying systems. The advantages of a massive multiple-input multiple-output (M-MIMO) relay are explored to improve the energy efficiency of both wireless information and power transfer. We first give a detailed performance analysis, and obtain a closed-form expression of the secrecy outage capacity. Then, by maximizing the secrecy energy efficiency (SEE), defined as the ratio of the secrecy outage capacity and the total power consumption, we derive an energy-efficient power allocation scheme. Finally, simulation results validate the effectiveness of the proposed scheme.
The McGurk effect affected by the right ear advantage

The McGurk effect affected by the right ear advantage was investigated. The most common demonstration of the REA was the dichotic listening test. Subjects were simultaneously played two different syllables, one to each ear, and must report the syllable they perceive. WADA tests showed that about 90-95% of right-handers were left-hemisphere dominant for language but only 80-85% show an REA in dichotic studies. The McGurk effect was dependent on the audio component being ambiguous. Subjects viewed audiovisual clips on a continuous loop. The clips consisted of a voice pronouncing /aba/ dubbed over video of a face saying /aga/. The experiment was conducted in a quite room, with subjects wearing 'Extreme Isolation' [registered trademark] headphones. It was observed that REA is significant for right-handers as a group.
Gap Amplification for Small-Set Expansion via Random Walks

In this work, we achieve gap amplification for the Small-Set Expansion problem. Specifically, we show that an instance of the Small-Set Expansion Problem with completeness $\epsilon$ and soundness $\frac{1}{2}$ is at least as difficult as Small-Set Expansion with completeness $\epsilon$ and soundness $f(\epsilon)$, for any function $f(\epsilon)$ which grows faster than $\sqrt{\epsilon}$. We achieve this amplification via random walks -- our gadget is the graph with adjacency matrix corresponding to a random walk on the original graph. An interesting feature of our reduction is that unlike gap amplification via parallel repetition, the size of the instances (number of vertices) produced by the reduction remains the same.
Bovine tuberculosis trends in the UK and the Republic of Ireland, 1995–2010

Selected demographic features and trends in bovine tuberculosis (BTB) from 1995 to 2010 are described for the countries of the UK and the Republic of Ireland, using standardised definitions and measures. All countries experienced a reduction in the number of cattle and herds and in the proportion of dairy herds, while average herd size increased. In general, the trends indicate a stable situation of very low BTB prevalence in Scotland and, over most of the period, a rising prevalence in England and Wales. The prevalence in the Republic of Ireland declined while Northern Ireland experienced both a rise and fall. Differences in demography, BTB programme structure and test results were noted, particularly between the island of Ireland and Great Britain. Further investigation of these differences may provide valuable insights into risk factors for BTB and optimisation of existing BTB programmes.
A note on the Bruhat decomposition of semisimple Lie groups

Let a split element of a connected semisimple Lie group act on one of its flag manifolds. We prove that each connected set of fixed points of this action is itself a flag manifold. With this we can obtain the generalized Bruhat decomposition of a semisimple Lie group by entirely dynamical arguments.
Predicting the effects of optical defocus on human contrast sensitivity.

We used diffraction modulation transfer functions and model eyes to predict the effect of defocus on the contrast sensitivity function (CSF) and compared these predictions with previously published experimental data. Using the principle that optically induced changes in the modulation transfer function should be paralleled by identical changes in the CSF, we used the modulation transfer function calculations with the best-focus CSF measurements to predict the defocused CSF. An aberration-free model predicted the effects of defocus well when the CSF was measured with small pupils (e.g., 2 mm) but not with larger pupils (6-8 mm). When the model included average aberrations, prediction of the defocused CSF with large pupils was better but remained inaccurate, failing, in particular, to reflect differences between individual subjects. Inclusion of measured aberrations for individual subjects provided accurate predictions in the shape of the monochromatic CSF of two of three subjects with hyperopic defocus and good predictions of the polychromatic CSF of two subjects with hyperopic defocus. Prediction of the effects of myopic defocus by use of measured individual aberrations of one subject were less successful. Hence a diffraction optics model can provide good predictions of the effects of defocus on the human CSF, given that one has knowledge of the individual ocular aberrations. These predictions are dependent on the quality of the aberration measurements.
CODE-RADE - Community Infrastructure for the Delivery of Physics Applications

Scientific computing can in some sense be distilled to the execution of an application - or rather sets of applications which are combined into complex workflows. Due to the complexity and number both of scientific packages as well as computing platforms, delivering these applications to end users has always been a significant challenge through the grid era, and remains so in the cloud era. In this contribution we describe a platform for user-driven, continuous integration and delivery of research applications in a distributed environment - project CODE-RADE. Starting with 6 hypotheses describing the problem at hand, we put forward technical and social solutions to these. Combining widely-used and thoroughly-tested tools, we show how it is possible to manage the dependencies and configurations of a wide range of scientific applications, in an almost fully-automated way. The CODE-RADE platform is a means for developing trust between public computing and data infrastructures on the one hand and various developer and scientific communities on the other hand. Predefined integration tests are specified for any new application, allowing the system to be user-driven. This greatly accelerates time-to-production for scientific applications, while reducing the workload for administrators of HPC, grid and cloud installations. Finally, we will give some insight into how this platform could be extended to address issues of reproducibility and collaboration in scientific research in Africa.