Miracle-dz/UniFAR-FTUs huggingface dataset:
Mieux comprendre les causes du présentéisme: une analyse systématique à partir des facteurs du modèle exigences-ressources

Presenteeism is attending work while ill. Recent researches on the subject highlights that presenteeism is associated with mental and physical health problems. Nevertheless, it also appears that only a few theoretical frameworks and models have been presented in order to better understand this phenomenon. In light of Bakker and Demerouti (2017) job demands-resources model, this paper aims to present an explaining up-to-date knowledge on presenteeism, especially concerning the factors which can lead to presenteeism. Based on the most recent knowledge on presenteeism, this article leads to conceptualize presenteeism as an intervening mechanism between these factors (organizational, physical, psychological, social factors) and the outcomes presented by this model (psychological strain, performance, motivation). This systematic review of past work on the subject emphasizes several explanatory hypotheses concerning specific incongruities observed in the literature. Particularly, this leads to emphasize the coexistence of two forms of presenteeism (voluntary/involuntary), each one motivated by the evaluation made by an employee of the demands and resources regarding his or her specific work situation. Possible research avenues are discussed in conclusion. Le présentéisme renvoie au fait d’aller travailler malgré un problème de santé pouvant justifier une absence. Les travaux sur le sujet reconnaissent bien maintenant que le présentéisme peut entraîner des effets délétères sur la santé des travailleurs. Au même moment, force est d’admettre que peu de cadres ou de modèles théoriques ont été proposés afin d’accroître notre compréhension de ce phénomène. Le modèle exigences-ressources mis en évidence par les travaux de Bakker et Demerouti (2017) semble une avenue intéressante et permet de jeter un regard nouveau sur les facteurs qui peuvent conditionner l’acte de présentéisme. Sur la base des plus récentes connaissances scientifiques, cet article positionne le présentéisme comme un mécanisme intermédiaire (voire médiateur) entre les facteurs organisationnels, physiques, psychologiques et sociaux, et les principales conséquences reconnues relativement à ce modèle (tension psychologique, rendement, motivation). Cette recension systématique permet d’émettre certaines hypothèses explicatives quant aux incongruités relevées dans les études parues jusqu’à ce jour, notamment, de mettre en relief l’existence possible de deux formes de présentéisme (volontaire ou involontaire), chacune motivée par l’évaluation que fait le travailleur des exigences et des ressources liées à sa situation de travail. Des pistes de recherche sont proposées en guise de conclusion.
Optimal Successive Group Decoding to Mitigate Interference in Wireless Systems

In this paper we aim to assess the performance of the optimal successive group decoder (OSGD) in the wireless interference channel (IC) for different scenarios using wide range of testing metrics. Therefore, we inspect the capability of OSGD to mitigate interference, also, we evaluate its minimum required energy per bit under specific quality of service (QoS) constraints. This paper explores the performance of the OSGD in different SNR environments, using several transmit-receive multiple-input multiple-output (MIMO) antenna configurations. The obtained numerical results of this paper show that OSGD technique exhibits very efficient performance to cope with interference in the investigated scenarios, proving its competency comparing to the most developed interference cancellation approaches.
Bayesian Modeling of External Corrosion in Underground Pipelines Based on the Integration of Markov Chain Monte Carlo Techniques and Clustered Inspection Data

In this study, a model is developed to assess external corrosion in buried pipelines based on the unification of Bayesian inferential structure derived from Markov chain Monte Carlo techniques using clustered inspection data. This proposed stochastic model combines clustering algorithms that can ascertain the similarity of corrosion defects and Monte Carlo simulation that can give an accurate probability density function estimation of the corrosion rate. The metal loss rate is chosen as the indicator of corrosion damage propagation, obeying a generalized extreme value (GEV) distribution. Bayesian theory was employed to update the probability distribution of metal loss rate as well as the GEV parameters in order to account for the model uncertainty. The proposed model was validated with direct and indirect inspection data extracted from a 110‐km buried pipeline system.
VR-Defender: Self-Defense Against Vehicular Rogue APs for Drive-Thru Internet

This paper considers the problem of vehicular rogue access points (APs) for drive-thru Internet. Vehicular rogue APs are set up in moving vehicles to mimic legitimate roadside APs so as to lure users into associating with them. Due to the mobility, a vehicular rogue AP is able to maintain a long connection with users, which gives the adversary more time to launch various attacks and steal users' sensitive data. We propose a practical user-side detection scheme to prevent users from connecting to vehicular rogue APs without the help of a network administrator. In our solution, each AP broadcasts its GPS location; thus, a vehicular rogue AP has to forge its location to evade detection. A lie detector algorithm based on information collected and exchanged by clients is then used to validate whether the reported location is fake, aiming to detect the rogue AP. We have implemented the prototype and evaluated it on commercial off-the-shelf devices. We observed that our scheme can achieve more than 90% accuracy in real-world experiments.
Modulation of Wnt signaling by the nuclear localization of cellular FLIP-L

Cellular FLIP (cFLIP) inhibits the apoptosis signaling initiated by death receptor ligation. We previously reported that a long form of cFLIP (cFLIP-L) enhances Wnt signaling via inhibition of β-catenin ubiquitylation. In this report, we present evidence that cFLIP-L translocates into the nucleus, which could have a role in modulation of Wnt signaling. cFLIP-L has a functional bipartite nuclear localization signal (NLS) at the C-terminus. Wild-type cFLIP-L (wt-FLIP-L) localizes in both the nucleus and cytoplasm, whereas NLS-mutated cFLIP-L localizes predominantly in the cytoplasm. cFLIP-L also has a nuclear export signal (NES) near the NLS, and leptomycin B, an inhibitor of CRM1-dependent nuclear export, increases the nuclear accumulation of cFLIP-L, suggesting that it shuttles between the nucleus and cytoplasm. Expression of mutant cFLIP-L proteins with a deletion or mutations in the NLS and NES confers resistance to Fas-mediated apoptosis, as does wt-FLIP-L, but they do not enhance Wnt signaling, which suggests an important role of the C-terminus of cFLIP-L in Wnt-signaling modulation. When wt-FLIP-L is expressed in the cytoplasm by conjugation with exogenous NES (NES-FLIP-L), Wnt signaling is not enhanced, whereas the NES-FLIP-L increases cytoplasmic β-catenin as efficiently as wt-FLIP-L. cFLIP-L physically interacts with the reporter plasmid for Wnt signaling, but not with the control plasmid. These results suggest a role for nuclear cFLIP-L in the modulation of Wnt signaling.
Viral antigen and extensive division maintain virus-specific CD8 T cells during chronic infection

Efficient maintenance of memory CD8 T cells is central to long-term protective immunity. IL-7– and IL-15–driven homeostatic proliferation is essential for long-term memory CD8 T cell persistence after acute infections. During chronic infections, however, virus-specific CD8 T cells respond poorly to these cytokines. Yet, virus-specific CD8 T cells often persist for long periods of time during chronic infections. We have addressed this apparent paradox by examining the mechanism for maintaining virus-specific CD8 T cells during chronic infection. We find that homeostatic cytokines (e.g., IL-7/15), inflammatory signals, and priming of recent thymic emigrants are not sufficient to maintain virus-specific CD8 T cells over time during chronic infection. Rather, our results demonstrate that viral peptide is required for virus-specific CD8 T cell persistence during chronic infection. Moreover, this viral antigen-dependent maintenance results in a dramatically different type of T cell division than is normally observed during memory T cell homeostasis. Rather than undergoing slow, steady homeostatic turnover during chronic viral infection, CD8 T cells undergo extensive peptide-dependent division, yet cell numbers remain relatively stable. These results indicate that antigen-specific CD8 T cell responses during persisting infection are maintained by a mechanism distinct from that after acute infection.
cclib: A library for package‐independent computational chemistry algorithms

There are now a wide variety of packages for electronic structure calculations, each of which differs in the algorithms implemented and the output format. Many computational chemistry algorithms are only available to users of a particular package despite being generally applicable to the results of calculations by any package. Here we present cclib, a platform for the development of package‐independent computational chemistry algorithms. Files from several versions of multiple electronic structure packages are automatically detected, parsed, and the extracted information converted to a standard internal representation. A number of population analysis algorithms have been implemented as a proof of principle. In addition, cclib is currently used as an input filter for two GUI applications that analyze output files: PyMOlyze and GaussSum. © 2007 Wiley Periodicals, Inc. J Comput Chem, 2008
New real-time resampling algorithm for particle filters

Two kinds of real-time resampling algorithms, local selection (LS) and Markov Chain Monte Carlo (MCMC), are briefly reviewed, and a new resampling algorithm suitable for real-time implementation of particle filters is proposed. The new resampling algorithm incorporates the concept of interleaving to overcome the drawback that when particles with large weights gather together, the performance will be degraded. The proposed resampling algorithm allows pipelined processing and parallelization implementation, which makes the particle filters more efficient. Simulations of a 2D target tracking application are conducted and the results indicate that the tracking accuracy of the proposed algorithm is superior to LS and MCMC. The hardware architecture of the algorithm is given. The hardware complexity including execution time and parallelization is analyzed, and it proves that the proposed method is efficient for real-time application.
Regulation of Energy Balance by the Hypothalamic Lipoprotein Lipase Regulator Angptl3

Hypothalamic lipid sensing is important for the maintenance of energy balance. Angiopoietin-like protein 3 (Angptl3) critically regulates the clearance of circulating lipids by inhibiting lipoprotein lipase (LPL). The current study demonstrated that Angptl3 is highly expressed in the neurons of the mediobasal hypothalamus, an important area in brain lipid sensing. Suppression of hypothalamic Angptl3 increased food intake but reduced energy expenditure and fat oxidation, thereby promoting weight gain. Consistently, intracerebroventricular (ICV) administration of Angptl3 caused the opposite metabolic changes, supporting an important role for hypothalamic Angptl3 in the control of energy balance. Notably, ICV Angptl3 significantly stimulated hypothalamic LPL activity. Moreover, coadministration of the LPL inhibitor apolipoprotein C3 antagonized the effects of Angptl3 on energy metabolism, indicating that LPL activation is critical for the central metabolic actions of Angptl3. Increased LPL activity is expected to promote lipid uptake by hypothalamic neurons, leading to enhanced brain lipid sensing. Indeed, ICV injection of Angptl3 increased long-chain fatty acid (LCFA) and LCFA-CoA levels in the hypothalamus. Furthermore, inhibitors of hypothalamic lipid-sensing pathways prevented Angptl3-induced anorexia and weight loss. These findings identify Angptl3 as a novel regulator of the hypothalamic lipid-sensing pathway.
Simulations of constrained domain switching in ferroelectric ceramics based on an optimization model

An optimization-based computational model is proposed to study the constrained domain switching in polycrystalline ferroelectrics. Charge screening effect is taken into account thus the depolarization field induced by polarization switching vanishes. The stress field induced by non-180° switching cannot be compensated and is considered in an Eshelby inclusion manner. Domain switching is realized by an optimization process to minimize the free energy of each grain using fractions of each domain as the optimization variables. This model does not impose any priori domain switching criterion, thus having the similar superiority as the phase field model. Besides the polarization and strain, the domain textures can also be calculated using this model. Simulation results show that very little 90° domain switching can occur in tetragonal PZT ceramics, while in rhombohedral PZT ceramics, about half of non-180° switching can be accomplished under moderate electric poling. The large difference in poling difficulties between the tetragonal and rhombohedral PZT ceramics is partial due to the crystal symmetry differences, and also due to the large difference in lattice deformation during P-F phase transitions.
Ocitocina sérica e comportamento afetivo de cães na interação com crianças e adultos

Oxytocin has been used to measure social bonds in animals. Recently it has been shown that oxytocin concentration increases in dogs and owners when interacting positively. It is expected that during interaction with children and adults, female dogs are more affective than male dogs, resulting and the augmentation of serum oxytocin levels. Objective: To determine if there is a difference in serum oxytocin levels and affiliative behavior in male and female dogs when interacting with children and adults. Methods: an experimental study was done, with 12 Beagles, 6 males and 6 females, belonging to the Laboratory of Animal Education (LEZO) of the Faculty of Agronomy, Federal University of Rio Grande do Sul (UFRGS). Prior to the interaction, blood was collected for determination of basal oxytocin in dogs. The test was filmed for 3 minutes for further analysis of canine behavior, while the animals were in contact with a girl, closed in a room, one after the other, intercalating males and females, successively. After this period, they returned their stalls, and 10 minutes later, the blood was drawned again. For determination of serum oxytocin values the Oxytocin ELISA kit ADI-900153A-0001 from Assay Designs will be used. Serum oxytocin dosages will be tested for normality and equality of variance and, if normal distributed, evaluated by the Student t test. Interactions between dogs and participants were recorded over 180 seconds by a video camera placed in the center of the test room ceiling. From an ethogram previously determined by the researchers, an analysis of the recordings was made. Latency, frequency and total duration of behaviors were measured using a timebased measurement system. Results: after 15 behaviors analyses, only latency for intention of contact (p=0.03) and escape behavior (p=0.003) were significantly different between males and females. Other behaviors did not show significant statistical differences. According to the researchers' subjective analysis, females were more docile with children than males. Serum oxytocin assays could not be performed. Conclusion: Behavioral analysis showed that in two parameters females had a more pleasant interaction with the child. After the dosage of oxytocin, this conclusion can be corroborated.
Ontogeny of Stromal Organizer Cells during Lymph Node Development

The development of secondary lymphoid organs, such as lymph nodes (LNs), in the embryo results from the reciprocal action between lymphoid tissue inducer (LTi) cells and stromal cells. However, the initial events inducing LN anlagen formation before the LTi stromal cells cross-talk interactions take place are not fully elucidated. In this study, we show that the inguinal LN anlagen in mouse embryos developed from mesenchymal cells surrounding the lymph sacs, spherical structures of endothelial cells that bud from veins. Using inguinal and mesenteric LNs (mLNs), we provide evidence supporting a two-step maturation model for stromal cells: first, ICAM-1−VCAM-1− mesenchymal precursor cells become ICAM-1intVCAM-1int cells, in a process independent of LTi cells and lymphotoxin β receptor (LTβR) signaling. The second step involves the maturation of ICAM-1intVCAM-1int cells to ICAM-1highVCAM-1high mucosal addressin cell adhesion molecule-1+ organizer cells and depends on both LTi cells and LTβR. Addition of αLTβR agonist to LN organ cultures was sufficient to induce ICAM-1intVCAM-1int cells to mature. In LtβR−/− embryos, both inguinal and mLN stromal cells showed a block at the ICAM-1intVCAM-1int stage, and, contrary to inguinal LNs, mLNs persist longer and contained LTi cells, which correlated with the sustained gene expression of Il-7, Cxcl13, and, to a lesser degree, Ccl21. Taken together, these results highlight the importance of the signals and cellular interactions that induce the maturation of stromal cells and ultimately lead to the formation of lymphoid tissues.
Run-Time Error Detection in Polynomial Basis Multiplication Using Linear Codes

In this article we consider detection of errors in polynomial basis multipliers, which have applications in channel coding, VLSI testing, and cryptography. Error detection is performed by applying a class of linear codes while the multiplier is in use. In this article, two error detection schemes are presented. Results show that the probability of error detection of our single-input encoding (SIE) scheme using eight redundant bits is approximately 0.996. Additionally, the time and area overheads of the schemes for our bit-serial implementations are in a reasonable range, e.g., for the SIE scheme with eight redundant bits, the area overhead is 39.71% and the time overhead has been observed to be negligible.
Inflation Persistence and Price-Setting Behaviour in the Euro Area - a Summary of the Ipn Evidence

This paper provides a summary of current knowledge on inflation persistence and price stickiness in the euro area, based on research findings that have been produced in the context of the Inflation Persistence Network. The main findings are - i) Under the current monetary policy regime, the estimated degree of inflation persistence in the euro area is moderate; ii) Retail prices in the euro area are more sticky than in the US; iii) There is significant sectoral heterogeneity in the degree of price stickiness; iv) Price decreases are not uncommon. The paper also investigates some of the policy implications of these findings. JEL Classification: E31, E42, E52.
NeuroBlocks – Visual Tracking of Segmentation and Proofreading for Large Connectomics Projects

In the field of connectomics, neuroscientists acquire electron microscopy volumes at nanometer resolution in order to reconstruct a detailed wiring diagram of the neurons in the brain. The resulting image volumes, which often are hundreds of terabytes in size, need to be segmented to identify cell boundaries, synapses, and important cell organelles. However, the segmentation process of a single volume is very complex, time-intensive, and usually performed using a diverse set of tools and many users. To tackle the associated challenges, this paper presents NeuroBlocks, which is a novel visualization system for tracking the state, progress, and evolution of very large volumetric segmentation data in neuroscience. NeuroBlocks is a multi-user web-based application that seamlessly integrates the diverse set of tools that neuroscientists currently use for manual and semi-automatic segmentation, proofreading, visualization, and analysis. NeuroBlocks is the first system that integrates this heterogeneous tool set, providing crucial support for the management, provenance, accountability, and auditing of large-scale segmentations. We describe the design of NeuroBlocks, starting with an analysis of the domain-specific tasks, their inherent challenges, and our subsequent task abstraction and visual representation. We demonstrate the utility of our design based on two case studies that focus on different user roles and their respective requirements for performing and tracking the progress of segmentation and proofreading in a large real-world connectomics project.
The effect of preterm birth on white matter tracts and infant cognition

A latent measure of white matter microstructure (gWM) provides a neural basis for information processing speed and intelligence in adults, but the temporal emergence of gWM during human development is unknown. We provide evidence that substantial variance in white matter microstructure is shared across a range of major tracts in the newborn brain. Based on diffusion MRI scans from 145 neonates (gestational age [GA] at birth range 23 to 41 weeks), the microstructural properties of eight major white matter tracts were calculated using probabilistic neighborhood tractography. Principal component analyses (PCAs) were carried out on the correlations between the eight tracts, separately for four tract-averaged water diffusion parameters: fractional anisotropy, and mean, radial and axial diffusivities. For all four parameters, PCAs revealed a single latent variable that explained around half of the variance across all eight tracts, and all tracts showed positive loadings. We considered the impact of early
On the number of crossing-free matchings, (cycles, and partitions)

We show that a set of <i>n</i> points in the plane has at most <i>O</i>(10.05<sup><i>n</i></sup>) perfect matchings with crossing-free straight-line embedding. The expected number of perfect crossing-free matchings of a set of <i>n</i> points drawn i.i. d. from an arbitrary distribution in the plane is at most <i>O</i>(9.24<sup><i>n</i></sup>). Several related bounds are derived: (a) The number of all (not necessarily perfect) crossing-free matchings is at most <i>O</i>(10.43<sup><i>n</i></sup>). (b) The number of <i>left-right</i> perfect crossing-free matchings (where the points are designated as left or as right endpoints of the matching edges) is at most <i>O</i>(5.38<sup><i>n</i></sup>). (c) The number of perfect crossing-free matchings across a line (where all the matching edges must cross a fixed halving line of the set) is at most 4<sup><i>n</i></sup>. These bounds are employed to infer that a set of <i>n</i> points in the plane has at most <i>O</i>(86.81<sup><i>n</i></sup>) crossing-free spanning cycles (simple polygonizations), and at most <i>O</i>(12.24<sup><i>n</i></sup>) crossing-free partitions (partitions of the point set, so that the convex hulls of the individual parts are pairwise disjoint).
Performance of Multicast MISO-OFDM Systems

In this paper, we evaluate the performance of multicast OFDM systems with single and multiple transmit antennas. We have shown that it is possible to increase the data rate of multicast OFDM systems by selecting the users with good channel for each subcarrier. For the single transmit antenna case, the resource allocation has been applied using the two-step algorithm where subcarrier allocation and bit loading are performed separately. For the multiple transmit antennas case, we have proposed a suboptimal algorithm using a set of precoding vectors. In this study, we present the simulation results of the complete transmission chain where we have associated the resource allocation algorithms with a powerful erasure code. The results show that the proposed algorithms outperform the classical worst case algorithm for both single and multiple transmit antennas. 1 keywords : Multicast OFDM, multiple transmit antennas, precoding vector optimization, adaptive subcarrier allocation, erasure code.