Quantification and Modeling of Broken Links Prevalence in Hyper Traffic Websites Homepages

Broken links in websites external resources pose a serious threat to cybersecurity and the credibility of websites. They can be hijacked to eavesdrop user traffic or to inject malicious software. In this paper, we present the first result of an ongoing research. We focus on the prevalence of broken links in external resources on home pages of the most visited websites in the world. The analysis was conducted on the top 88 000 homepages extracted from the Majestic Million rankings. 35,2% of them have at least one broken link. We also identify the common causes of these broken links and highlight improper implementation of testing phases to prevent such errors. We provide a formal model for the distribution of external links. At the next research step, we are exploring the potential impact on privacy of broken links by analyzing inherited traffic of purchasable expired domains.Comment: 4 pages, 3 tables, 1 figur

A three-dimensional experimental investigation of the structure of the spanwise vortex formed by a shallow vortex dipole

The three-dimensional dynamics of shallow vortex dipoles is investigated by means of an innovative 3D-3C (three dimensions, three components) scanning PIV technique. In particular, the three-dimensional structure of a frontal spanwise vortex is characterized. The technique also allows the computation of the pressure field, which is not available using standard 2D PIV measurement. The influence of such complex vortex structures on the mass transport is discussed in light of the available pressure field

A three-dimensional experimental investigation of the structure of the spanwise vortex generated by a shallow vortex dipole

The three-dimensional dynamics of shallow vortex dipoles is investigated by means of an innovative three-dimensional, three-component (3D-3C) scanning PIV technique. In particular, the three-dimensional structure of a frontal spanwise vortex is characterized. The technique allows the computation of the three-dimensional pressure field and the planar (x, y) distribution of the wall shear stress, which are not available using standard 2D PIV measurements. The influence of such a complex vortex structure on mass transport is discussed in the context of the available pressure and wall shear stress fields

Unusual Sensory Disturbances Revealing Posterior Spinal Artery Infarct

Spinal cord infarctions are rare, especially at the cervical level and in the posterior spinal artery territory. Moreover, this diagnosis is difficult to establish as the clinical picture varies. Even if sensory patterns appear as cardinal signs, their distribution can be very variable. We report a rare case of posterior cervical cord infarction revealed by an unusual pure sensory clinical picture

Integrate, yes, but what and how? A computational approach of perceptuo-motor fusion in speech perception

International audienceWe consider a computational model comparing the possible roles of "association" and "simulation" in phonetic decoding, demonstrating that these two routes can contain similar information in some "perfect" communication situations and highlighting situations where their decoding performance differs. We conclude that optimal decoding should involve some sort of fusion of association and simulation in the human brain

Adverse conditions improve distinguishability of auditory, motor and perceptuo-motor theories of speech perception: an exploratory Bayesian modeling study

Special Issue: Speech Recognition in Adverse ConditionsInternational audienceIn this paper, we put forward a computational framework for the comparison between motor, auditory, and perceptuo-motor theories of speech communication. We first recall the basic arguments of these three sets of theories, either applied to speech perception or to speech production. Then we expose a unifying Bayesian model able to express each theory in a probabilistic way. Focusing on speech perception, we demonstrate that under two hypotheses, regarding communication noise and inter-speaker variability, providing perfect conditions for speech communication, motor, and auditory theories are indistinguishable. We then degrade successively each hypothesis to study the distinguish- ability of the different theories in ''adverse'' conditions. We first present simulations on a simplified implementation of the model with mono-dimensional sensory and motor variables, and secondly we consider a simulation of the human vocal tract providing more realistic auditory and articulatory variables. Simulation results allow us to emphasise the respective roles of motor and auditory knowledge in various conditions of speech perception in adverse conditions, and to suggest some guidelines for future studies aiming at assessing the role of motor knowledge in speech perception

Dynamique d'un dipole tourbillonnaire en eau peu profonde

Nous présentons des résultats expérimentaux préliminaires obtenus lors de l'étude d'un dipôle tourbillonnaire en eau peu profonde. En particulier, la formation d'un tourbillon transverse secondaire se positionnant à l'avant de la structure dipolaire est mise en évidence. Enfin, nous identifions le processus de formation de ce tourbillon secondaire lié à l'étirement de la vorticité contenue dans la couche limite développée lors du déplacement du dipôle

Quality of roof harvested rainwater from houses in Île-de-France area, France

International audienceBacteriological and physico-chemical water quality parameters were measured in rainwater from 10 harvesting tanks, belonging to two types of rainwater harvesting systems (outside tanks for garden watering and underground tanks for both outdoor and indoor uses) in Île-de-France area (France). The presence of fecal coliforms, enterococci, Pseudomonas spp., coliforms, total flora at 22°C and 36°C and total DAPI direct counts showed a microbiological contamination in water and sediment samples for both tank types. However, the harvested rainwater quality suited some existing water quality guidelines for different non-potable purposes (bathing water or reused wastewater). To our knowledge, the presence of microorganisms in sediment compartment in rainwater harvesting tank has been studied for the first time here. Results showed that the sediment could be a reservoir of re-contamination for some microbial species, which would survive in the sediment and may be resuspended in the water column. In parallel, physical-chemical parameters (temperature, turbidity, conductivity, pH and dissolved organic carbon) of collected rainwater were found in the ranges reported in the literature. Algal blooms, principally green algae, occurred in the outside tanks during spring and summer as shown by the high chlorophyll levels (the highest chlorophyll content reached 209.8 µg/L with a water pH of 9.37). Nitrate and phosphate concentrations in water samples were low (respectively less than 5 mg/L and 0.5 mg/L) but high enough to support the development of microorganisms and especially photosynthetic microorganisms in the outside tanks. The difficulty to evaluate the microbial quality of roof-harvested rainwater due to the lack of suitable quality standards is underlined. Depending on the usage of the harvested rainwater, some treatments may be needed to get a better microbial quality and direct measurements for pathogens may be also needed to establish whether or not such harvested rainwater is safe for different types of uses