Miracle-dz/UniFAR-FTUs huggingface dataset:
La dépression post-accident vasculaire cérébral au Burkina Faso

Introduction Lourde de conséquences sur la récupération motrice du patient, la dépression post-accident vasculaire cérébral (DPAVC) est souvent méconnue et sous-diagnostiquée. Notre objectif était d'en étudier les aspects épidémiologiques, cliniques, thérapeutiques en milieu hospitalier au Burkina Faso. Méthodes Il s'agissait d'une étude transversale de 21 mois. Elle a concerné tous les cas d'AVC hospitalisés durant la période d’étude dont le délai de survenue de l'ictus était supérieur ou égal à 2 semaines. Une fois le diagnostic de DPAVC posé par les critères du DSM IV, sa sévérité était évaluée par l’échelle MADRS (Montgomery and Asberg Depression Rating Scale). Les patients DPAVC étaient revus 2 mois pour réévaluer leur dépression. Résultats Sur 167 hospitalisations pour AVC, 65 patients avaient une DPAVC (38,9%). L’âge moyen était de 56,9 ans avec des extrêmes de 29 et 84 ans. Le sex ratio était de 0,9. Les AVC ischémiques étaient majoritaires (53,8%). Quarante-trois patients (66,15%) présentaient une DPAVC mineure et 22 patients (33,85%), une DPAVC majeure. La DPAVC a été précoce dans 73,8% des cas (délai inférieur ou égal à 30 jours). Un traitement antidépresseur a concerné 28 patients (43,1%). L’évolution à deux mois chez 31 patients était favorable dans 29% des cas. Conclusion La DPAVC est fréquente dans notre contexte. Elle compromet le pronostic fonctionnel et augmente le risque de morbidité et de mortalité Elle devrait être recherchée systématiquement chez tout hémiplégique, en particulier à la phase précoce, lors des entretiens réguliers avec la famille, et devant toute modification du psychisme du patient.
Critical Mass and Network Size with Application to the Us Fax Market

We analyze the equilibrium size of networks under alternative market structures. Networks are characterized by positive size externalities (commonly called "network externalities"). That is, the benefits of the addition of an extra node (or an extra customer) exceed the private benefits accruing to the particular node (or customer). A direct consequence of this demand structure is that perfect competition does not implement the optimal outcome. Because of the externality, there exists a range of prices within which three different network sizes can be supported as equilibria: a zero size network, an intermediate size that is unstable, and a large stable and Pareto optimal one. We expect that the market will select the largest of the three equilibrium networks. As a result, small networks will not observed. We call critical mass the size of the smallest network that can be supported in equilibrium. Alternative allocation systems internalize the network externality to different degrees, and therefore result in a variety of sizes of critical masses and price-network size paths. A welfare-maximizing planner supports a larger network than results in perfect competition. Surprisingly, a monopolist, even if allowed to influence consumers' expectations, always chooses a network of smaller size than in perfect competition. Oligopolists of compatible network goods support networks of smaller size than perfect competition and larger than monopoly. We extend our results to durable goods in a dynamic setting. In the presence of a downward time trend for industry marginal cost, the presence of network externalities increases the speed at which market demand grows. We use this prediction to calibrate the model and obtain estimates of the parameter measuring a consumer's valuation of the installed base (i.e., the network effect) using aggregate time series data on prices and quantities in the US fax market.
Study of a 3DMLUV-FIA method for EM scattering from dielectric object and rough surface

The electromagnetic scattering from the composite model of a three-dimensional (3-D) dielectric object located above a two-dimensional (2-D) dielectric rough surface is analyzed in this work. The 3DMLUV has been successfully applied in the scattering of PEC targets, however, when the object or rough surface become dielectric, the coupling between dielectric object and dielectric rough surface will lead to slow constriction. The FIA is applied to further speed up the constricted speed of the matrix required in 3DMLUV. The efficiency, stability and accuracy of the proposed method are demonstrated in a variety of scattering problems.
Internalized Homophobia and Psychosexual Adjustment among Gay Men

The present study examined links between internalized homophobia and psychosexual tendencies among 261 homosexual men. Analysis indicated that men who accept their homosexuality less rate themselves higher on sexual anxiety, sexual depression, fear of sexuality, and concern about sexual image and lower on internal sexual control, sexual esteem, and sexual satisfaction. Although no significant differences were found between HIV-seropositive and HIV-seronegative subjects, the associations between internalized homophobia and certain psychosexual tendencies seemed more pronounced in the seropositive respondents. We believe it would be beneficial for homosexual men who are very homophobic to seek psychoeducative or therapeutic consultation to develop more positive attitudes toward their homosexuality and thereby better the quality of their lives.
Quantitative tracking of grain structure evolution in a nanocrystalline metal during cyclic loading

Molecular dynamics simulations were used to quantify mechanically induced structural evolution in nanocrystalline Al with an average grain size of 5 nm. A polycrystalline sample was cyclically strained at different temperatures, while a recently developed grain tracking algorithm was used to measure the relative contributions of novel deformation mechanisms such as grain rotation and grain sliding. Sample texture and grain size were also tracked during cycling, to show how nanocrystalline plasticity rearranges overall grain structure and alters the grain boundary network. While no obvious texture is developing during cycling, the processes responsible for plasticity act collectively to alter the interfacial network. Cyclic loading led to the formation of many twin boundaries throughout the sample as well as the occasional coalescence of neighboring grains, with higher temperatures causing more evolution. A temperature-dependent cyclic strengthening effect was observed, demonstrating that both the structure and properties of nanocrystalline metals can be dynamic during loading.
Role of permanent pacing to prevent atrial fibrillation: science advisory from the American Heart Association Council on Clinical Cardiology (Subcommittee on Electrocardiography and Arrhythmias) and the Quality of Care and Outcomes Research Interdisciplinary Working Group, in collaboration with the 

This advisory summarizes the current database on pacing modalities and algorithms used to prevent and terminate atrial fibrillation (AF). On the basis of the evidence indicating that ventricular pacing is associated with a higher incidence of AF in patients with sinus node dysfunction, a patient who has a history of AF and needs a pacemaker for bradycardia should receive a physiological pacemaker (dual chamber or atrial) rather than a single-chamber ventricular pacemaker. For patients who need a dual-chamber pacemaker, efforts should be made to program the device to minimize the amount of ventricular pacing when atrioventricular conduction is intact. Many pacemakers and implantable defibrillators have features designed to prevent AF and to terminate AF with rapid atrial pacing. The evidence to support their use is limited, although these algorithms appear to be safe and usually add little additional cost. For patients who have a bradycardia indication for pacing and also have AF, no consistent data from large randomized trials support the use of alternative single-site atrial pacing, multisite right atrial pacing, biatrial pacing, overdrive pacing, or antitachycardia atrial pacing. Even fewer data support the use of atrial pacing in the management of AF in patients without symptomatic bradycardia. At present, permanent pacing to prevent AF is not indicated; however, additional studies are ongoing, which will help to clarify the role of permanent pacing for AF.
Multi view image surveillance and tracking

The paper presents a set of methods for multi view image tracking using a set of calibrated cameras. We demonstrate how effective the approach is for resolving occlusions and tracking objects between overlapping and non-overlapping camera views. Moving objects are initially detected using background subtraction. Temporal alignment is then performed between each video sequence in order to compensate for the different processing rates of each camera. A Kalman filter is used to track each object in 3D world coordinates and 2D image coordinates. Information is shared between the 2D/3D trackers of each camera view in order to improve the performance of object tracking and trajectory prediction. The system is shown to be robust in resolving dynamic and static object occlusions. Results are presented from a variety of outdoor surveillance video sequences.
Work in progress - game mechanics and social networking for co-production of course materials

Peer review has long been used in classroom settings, especially for teaching writing skills. In the last fifteen years, peer review has increasingly migrated online. Our Expertiza system has used online peer review of team projects to get students involved in the creation of reusable learning objects, such as homework problems, exam questions, and active- learning exercises. These activities support higher-order thinking skills and mimic workplace tasks. This paper reports on our efforts to integrate game mechanics into Expertiza. We hypothesize that by being able to share their achievements with the class, as well as attempting useful “microtasks” for extra credit, students will become more engaged with the class material and their fellow students. In addition, the course will be improved by the contributions that students will be motivated to create.
Energy-Efficient Data Gathering Techniques Using Multiple Paths for Providing Resilience to Node Failures in Wireless Sensor Networks

Multiple paths have been used to provide loadbalancing of traffic and resilience to node failures in mobile ad-hoc networks or sensor networks. In addition, the energy expenditure can be distributed among nodes over the multiple paths. However, most existing multi-path routing protocols require their complex procedures such as local repair or periodic reconstruction of the multiple paths, during which much loss of packet is even experienced. In this paper, we therefore propose two versions of an Energy efficient Data Gathering technique using Multiple paths (EDGM), which are more suitable for highly populated wireless sensor networks in terms of having more simple and resilient features than other existing techniques. One of them is to make use of the multiple shortest paths strictly. The other is to use a neighbor node’s path towards the sink node at the expense of using much longer paths to provide more resilience to node failures. By simulation using ns-2simulator, we prove that EDGM versions achieve two goals satisfactorily: energy-saving and resilience to node failure.
Model-Based Imaging of Cardiac Apparent Conductivity and Local Conduction Velocity for Diagnosis and Planning of Therapy

We present an adaptive algorithm which uses a fast electrophysiological (EP) model to estimate apparent electrical conductivity and local conduction velocity from noncontact mapping of the endocardial surface potential. Development of such functional imaging revealing hidden parameters of the heart can be instrumental for improved diagnosis and planning of therapy for cardiac arrhythmia and heart failure, for example during procedures such as radio-frequency ablation and cardiac resynchronisation therapy. The proposed model is validated on synthetic data and applied to clinical data derived using hybrid X-ray/magnetic resonance imaging. We demonstrate a qualitative match between the estimated conductivity parameter and pathology locations in the human left ventricle. We also present a proof of concept for an electrophysiological model which utilizes the estimated apparent conductivity parameter to simulate the effect of pacing different ventricular sites. This approach opens up possibilities to directly integrate modelling in the cardiac EP laboratory.
Prescribed Velocity Gradients for Highly Viscous SPH Fluids with Vorticity Diffusion

Working with prescribed velocity gradients is a promising approach to efficiently and robustly simulate highly viscous SPH fluids. Such approaches allow to explicitly and independently process shear rate, spin, and expansion rate. This can be used to, e.g., avoid interferences between pressure and viscosity solvers. Another interesting aspect is the possibility to explicitly process the vorticity, e.g., to preserve the vorticity. In this context, this paper proposes a novel variant of the prescribed-gradient idea that handles vorticity in a physically motivated way. In contrast to a less appropriate vorticity preservation that has been used in a previous approach, vorticity is diffused. The paper illustrates the utility of the vorticity diffusion. Therefore, comparisons of the proposed vorticity diffusion with vorticity preservation and additionally with vorticity damping are presented. The paper further discusses the relation between prescribed velocity gradients and prescribed velocity Laplacians which improves the intuition behind the prescribed-gradient method for highly viscous SPH fluids. Finally, the paper discusses the relation of the proposed method to a physically correct implicit viscosity formulation.
Analysis of manufacturing strategy on the basis of resource-based view of the firm

This paper examines manufacturing strategy from the respective of the resource-based view of the firm. It explores the key carrier which can show the uniqueness of resources in manufacturing is manufacturing capability. A model of manufacturing strategy is given on the basis of the three hypotheses. On the databases of IMSS, this paper empirically demonstrates that manufacturing performance is improved by manufacturing capability, which is driven by internal organizational learning and external organizational learning. Keywords resource-based view of the firm, manufacturing capability, internal organizational learning, external organizational learning I. INTRODUCTION Resourced-Based View of the firm (RBV) (1), has brought about a new research prospect for manufacturing strategy in recent years. It emphasizes that what makes an enterprise successful and unique from others is those resources and ability which are not easily be duplicated and learned by other competitors. As this theory is taken into account in the manufacturing strategy (2), the resources and ability are those which can make the manufacturing process different and distinguished from others'. This paper is to investigate what can protect it not to be imitated by others, with similar manufacturing materials and equipments available in the market?
Genetic Variant BDNF (Val66Met) Polymorphism Alters Anxiety-Related Behavior

A common single-nucleotide polymorphism in the brain-derived neurotrophic factor (BDNF) gene, a methionine (Met) substitution for valine (Val) at codon 66 (Val66Met), is associated with alterations in brain anatomy and memory, but its relevance to clinical disorders is unclear. We generated a variant BDNF mouse (BDNFMet/Met) that reproduces the phenotypic hallmarks in humans with the variant allele. BDNFMet was expressed in brain at normal levels, but its secretion from neurons was defective. When placed in stressful settings, BDNFMet/Met mice exhibited increased anxiety-related behaviors that were not normalized by the antidepressant, fluoxetine. A variant BDNF may thus play a key role in genetic predispositions to anxiety and depressive disorders.
Regional stabilization of rational discrete-time systems with magnitude control constraints

This work addresses the problem of local stabilization of rational systems considering magnitude control constraints. Based on a Recursive Algebraic Representation (RAR) of the system and on a generalized sector condition, stabilizing conditions in the form of linear matrix inequalities (LMIs) are proposed to compute a saturating state feedback control law that ensures the local asymptotic stability in a certain region of the state space. In this sense, a convex optimization problem is proposed to determine a control law aiming at maximizing an estimate of the region of attraction of the closed-loop system. An extension of the method to consider a quadratic performance criterion is also presented.
Differential axonal transport of isotubulins in the motor axons of the rat sciatic nerve

The axonal transport of the diverse isotubulins in the motor axons of the rat sciatic nerve was studied by two-dimensional polyacrylamide gel electrophoresis after intraspinal injection of [35S]methionine. 3 wk after injection, the nerve segments carrying the labeled axonal proteins of the slow components a (SCa) and b (SCb) of axonal transport were homogenized in a cytoskeleton-stabilizing buffer and two distinct fractions, cytoskeletal (pellet, insoluble) and soluble (supernatant), were obtained by centrifugation. About two-thirds of the transported- labeled tubulin moved with SCa, the remainder with SCb. In both waves, tubulin was found to be associated mainly with the cytoskeletal fraction. The same isoforms of tubulin were transported with SCa and SCb; however, the level of a neuron-specific beta-tubulin subcomponent, termed beta', composed of two related isotubulins beta'1 and beta'2, was significantly greater in SCb than in SCa, relative to the other tubulin isoforms. In addition, certain specific isotubulins were unequally distributed between the cytoskeletal and the soluble fractions. In SCa as well as in SCb, alpha''-isotubulins were completely soluble in the motor axons. By contrast, alpha''' and beta'2- isotubulins, both posttranslationally modified isoforms, were always recovered in the cytoskeletal fraction and thus may represent isotubulins restricted to microtubule polymers. The different distribution of isotubulins suggests that a recruitment of tubulin isoforms, including specific posttranslational modifications of defined isoforms (such as, at least, phosphorylation of beta' and acetylation of alpha'), might be involved in the assembly of distinct subsets of axonal microtubules displaying differential properties of stability, velocity and perhaps of function.
Toward retail product recognition on grocery shelves

This paper addresses the problem of retail product recognition on grocery shelf images. We present a technique for accomplishing this task with a low time complexity. We decompose the problem into detection and recognition. The former is achieved by a generic product detection module which is trained on a specific class of products (e.g. tobacco packages). Cascade object detection framework of Viola and Jones [1] is used for this purpose. We further make use of Support Vector Machines (SVMs) to recognize the brand inside each detected region. We extract both shape and color information; and apply feature-level fusion from two separate descriptors computed with the bag of words approach. Furthermore, we introduce a dataset (available on request) that we have collected for similar research purposes. Results are presented on this dataset of more than 5,000 images consisting of 10 tobacco brands. We show that satisfactory detection and classification can be achieved on devices with cheap computational power. Potential applications of the proposed approach include planogram compliance control, inventory management and assisting visually impaired people during shopping.
Characterization of micro-invasive trabecular bypass stents by ex vivo perfusion and computational flow modeling

Micro-invasive glaucoma surgery with the Glaukos iStent® or iStent inject® (Glaukos Corporation, Laguna Hills, CA, USA) is intended to create a bypass through the trabecular meshwork to Schlemm’s canal to improve aqueous outflow through the natural physiologic pathway. While the iStent devices have been evaluated in ex vivo anterior segment models, they have not previously been evaluated in whole eye perfusion models nor characterized by computational fluid dynamics. Intraocular pressure (IOP) reduction with the iStent was evaluated in an ex vivo whole human eye perfusion model. Numerical modeling, including computational fluid dynamics, was used to evaluate the flow through the stents over physiologically relevant boundary conditions. In the ex vivo model, a single iStent reduced IOP by 6.0 mmHg from baseline, and addition of a second iStent further lowered IOP by 2.9 mmHg, for a total IOP reduction of 8.9 mmHg. Computational modeling showed that simulated flow through the iStent or iStent inject is smooth and laminar at physiological flow rates. Each stent was computed to have a negligible flow resistance consistent with an expected significant decrease in IOP. The present perfusion results agree with prior clinical and laboratory studies to show that both iStent and iStent inject therapies are potentially titratable, providing clinicians with the opportunity to achieve lower target IOPs by implanting additional stents.
VISUAL PATTERN IMAGE CODING BY A MORPHOLOGICAL APPROACH (RESEARCH NOTE)

This paper presents an improvement of the Visual Pattern image coding (VPIC) scheme presented by Chen and Bovik in [2] and [3]. The patterns in this improved scheme are defined by morphological operations and classified by absolute error minimization. The improved scheme identifies more uniform blocks and reduces the noise effect. Therefore, it improves the compression ratio and image quality is steel preserved. To achieve a better compression ratio, a hierarchical approach based on the merging of uniform blocks is also described. Experimental results show that the improved scheme provides higher compression ratios compared to ordinary VPIC.
Effect of specimen anticoagulant and storage on measurement of serum and plasma fatty acid ethyl ester concentrations.

Fatty acid ethyl esters (FAEEs) are cytotoxic nonoxidative metabolites of ethanol that are produced by esterification of alcohol and fatty acids (1)(2)(3). After ethanol intake, FAEEs are found mainly in the liver, pancreas, heart, and brain, which are the major organs adversely affected by ethanol intake (4)(5). FAEEs are detectable in the blood for up to 24 h after consumption of ethanol to at least 600 mg/L (6)(7)(8), making the presence of FAEEs in blood a useful marker for ethanol intake. This investigation presents the results of studies on the effects of collection tube, storage time, and storage temperature on FAEE concentrations in blood, with the goal of creating a reliable clinical assay for serum and plasma FAEE quantification. Four volunteers participated in this study. Each subject was given a weight-adjusted amount of 100-proof vodka mixed with fruit juice in a 1:3 ratio (8). The vodka-juice beverage was divided into nine equal aliquots, which were administered every 10 min over a 90-min time period. After the last aliquot was drunk, blood samples were collected in four different 5-mL Vacutainer Tubes from each subject to assess the influence of the collection tube …
Socialization, personality, and social development

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