The Serrasalmidae (Pisces, Characoidei) from the Serra do Roncador, Mato Grosso, Brasil

Systematic account of the Fishes of the family Serrasalmidae (Characoidei, Cypriniformes) from the upper drainages of the Rios Araguaia and Xingu in Brazil, collected in 1968 by R.H. LOWE-McCONNELL, R. MILLS and J. GREEN. Eight species of the subfamily Myleinae are described, namely Myleus rubripinnis, M. schomburgki and a third unnamed species (that might be new to science), the rare Utiaritichthys sennaebragae and Acnodon normani (first collecting since the description of the types) and 3 Metynnis-species. Four species of the subfamily Serrasalminae are described: Serrasalmus striolatus ssp. (that has been compared with topotypical specimens of S. striolatus), S. humeralis (represented by topotypical individuals, which permitted an extended definition of the species), a geographic form of the common S. rhombeus and S. gibbus, an almost forgotten species that is tentatively restored

The influence of semantic context on initial eye landing sites in words

To determine the role of ongoing processing on eye guidance in reading, two studies examined the effects of semantic context on the eyes' initial landing position in words of different levels of processing diffculty. Results from both studies clearly indicate a shift of the initial fixation location towards the end of the words for words that can be predicted from a prior semantic context. However, shifts occur only in high-frequency words and with prior fixations close to the beginning of the target word. These results suggest that ongoing perceptual and linguistic processes can affect the decision of where to send the eyes next in reading. They are explained in terms of the easiness of processing associated with the target words when located in parafoveal vision. It is concluded that two critical factors might help observing effects of linguistic variables on initial landing sites, namely, the frequency of the target word and the position where the eyes are launched from as regards to the beginning of the target word. Results also provide evidence for an early locus of semantic context effects in reading

Indexing of Reading Paths for a Structured Information Retrieval on the Web

International audienceIn this paper, we present a hyperdocument model taking into account the essential aspects of information on the Web: content, composition (logical structure) and nonlinear reading (hypertext structure). We have developed a Structured Information Retrieval System (SIRS) based on this model. Its phases of indexing and querying are based on a “reading paths” point of view of the Web: a Web site is considered as a set of potential reading paths, instead of a set of atomic and flat pages. We have developed an specific algorithm to index the reading paths. We present some experiments aiming at evaluating the interest of our indexing process of reading paths

La Relativité Générale, un cadre cohérent pour la mécanique classique des milieux continus

S’inspirant des travaux de Jean-Marie Souriau, on se propose de revisiter la mécanique classique —pour laquelle la vitesse de la lumière est infinie— avec les outils de la Relativité Générale, en considérant le groupe de Galilée comme groupe de symétrie à la place de celui de Poincaré. L’objectif est d’énoncer les lois de la mécanique classique sous forme covariante, c’est-à-dire qu’elles conservent leur forme lors de changements quelconques de coordonnées spatio-temporelles. La géométrie de l’espace-temps n’est alors plus riemannienne, ce qui a pour conséquence majeure de ne plus pouvoir descendre ni monter les indices tensoriels. Le torseur de la dynamique se généralise sous la forme d’un tenseur affine deux fois contravariant antisymétrique de divergence nulle. La thermodynamique covariante des milieux continus s’obtient en adjoignant à l’espace-temps une cinquième coordonnée. Inspired by Jean-Marie Souriau’s works, we intend to revisit the classical mechanics —for which one the velocity of the light is infinite — with the tools of the General Relativity, considering Galileo’s group as symmetry group instead of Poincaré’s one. The aim is to state the laws of the classical mechanics in a covariant form, i.e. they preserve their form under any space-time coordinate change. Hence the geometry of the space-time is not Riemannian, with a major consequence that tensorial indices may be neither lowered nor raised. The mechanics’ torsor is generalized as a divergence free 2-rank contravariant skew-symmetric affine tensor. The covariant thermodynamics of continua is obtained by adding an extra fifth dimension to the space-time

How does Employment Growth in Wisconsin Compare to Other States Over the Past Decade?

Does the way in which a scene is viewed influence the interpretation of the role of the characters that appear in it, and does narrative context influence sensitivity to camera angle? In the linear conditions of the present study, each of 3 stories consisted of a sequence of 5 pictures. Pictures 2 and 3 introduced the 2 characters with either a high-angle, an eye-level, or a low-angle shot. In the random conditions, the S pictures were rearranged into a random order. Immediately after viewing each story, the 2 characters were rated on the 3 factors of Osgood's semantic differential (Evaluation, Potency, & Activation). Thereafter, an acceptable end to each of the 3 stories was to be chosen on a multiple-choice questionnaire. The results show a significant effect of the camera angle on the factor "Potency" under the linear condition: A low-angle shot elicited more potency. In addition, for one of the 3 stories in which the 2 characters were engaged in a common activity (chess playing), there was a significant difference on the choice of the probable ends as a function of camera position: The character, presented with a low-angle shot, was perceived as the winning player.Laboratorium voor Experimentele psychologie.status: publishe

BM25t: a BM25 extension for focused information retrieval

25 pagesInternational audienceThis paper addresses the integration of XML tags into a term-weighting function for focused XML Information Retrieval (IR). Our model allows us to consider a certain kind of structural information: tags that represent a logical structure (e.g. title, section, paragraph, etc.) as well as other tags (e.g. bold, italic, center, etc.). We take into account the influence of a tag by estimating the probability for this tag to distinguish relevant terms from the others. Then, these weights are integrated in a term-weighting function. Experiments on a large collection from the INEX 2008 XML IR evaluation campaign showed improvements on focused XML retrieval

Hand Occlusion on a Multi-Touch Tabletop

International audienceWe examine the shape of hand and forearm occlusion on a multi-touch table for different touch contact types and tasks. Individuals have characteristic occlusion shapes, but with commonalities across tasks, postures, and handedness. Based on this, we create templates for designers to justify occlusion-related decisions and we propose geometric models capturing the shape of occlusion. A model using diffused illumination captures performed well when augmented with a forearm rectangle, as did a modified circle and rectangle model with ellipse "fingers" suitable when only X-Y contact positions are available. Finally, we describe the corpus of detailed multi-touch input data we generated which is available to the community

LaHC at CLEF 2015 SBS Lab

International audienceThis paper describes the work of the LaHC lab of Saint-´ Etienne for the Social Book Search lab at CLEF 2015. Our goals were i) to study a field-based retrieval model (BM25F), exploiting various topics and documents fields, in order to build a strong baseline for further experiments, ii) to compare it with a Log logistic (LGD) retrieval model, and iii) to exploit some documents related to each topic (i.e. the documents given as negative or positive examples for a topic). The official results show that LGD outperforms BM25F, and that our approaches exploiting documents related to the topic requesters are based on a different interpretation of this additional information than the interpretation of the Social Book Search organizers

UJM at INEX 2009 XML Mining Track

8 pagesInternational audienceThis paper reports our experiments carried out for the INEX XML Mining track 2009, consisting in developing categorization methods for multi-labeled XML documents. We represent XML documents as vectors of indexed terms. The purpose of our experiments is twofold: firstly we aim to compare strategies that reduce the index size using an improved feature selection criteria CCD. Secondly, we compare a thresholding strategy (MCut) we proposed with common RCut, PCut strategies. The index size was reduced in such a way that the results were less good than expected. However, we obtained good improvements with the MCut thresholding strategy