131,037 research outputs found
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Grilles de perception évidentielles pour la navigation robotique en milieu urbain
No full textLes travaux de recherche présentés dans cette thèse portent sur le problème de la perception de l environnement en milieu urbain, complexe et dynamique et ce en présence de mesures extéroceptives bruitées et incomplètes obtenues à partir decapteurs embarqués. Le problème est formalisé sous l angle de la fusion de données capteurs à l aide d une représentation spatiale de l environnement. Ces travaux ont été réalisés pour la navigation autonome de véhicules intelligents dans le cadre du projet national ANR CityVIP. Après avoir considéré les principaux formalismes de modélisation de l incertitude, un système de fusion de grilles spatio-référencées gérant l incertitude avec des fonctions de croyances est étudié. Ce système est notamment capable de fusionner les mesures d un lidar multi-nappes et multi-échos, obtenues à différents instants pour construire une carte locale dynamique sous la forme discrète d une grille d occupation évidentielle.Le principal avantage des fonctions de croyance est de représenter de manière explicite l ignorance et ne nécessite donc pas d introduire d information à priori non fondée. De plus, ce formalisme permet d utiliser facilement l information conflictuelle pour déterminer la dynamique de la scène comme par exemple les cellules en mouvement. Le formalisme de grilles d occupation évidentielles est présenté en détails et un modèle de capteur lidar multi-nappes et multi-echos est ensuite proposé. Deux approches de fusion séquentielle multi-grilles sont étudiées selon les paradigmes halocentréet égo-centré. Enfin, l implémentation et les tests expérimentaux des approches sont décrits et l injection d informations géographiques connues a priori est étudiée. La plupart des travaux présentés ont été implémentés en temps réel sur un véhicule du laboratoire et de nombreux tests en conditions réelles ont été réalisés avec une interface d analyse de résultat utilisant une rétro-projection dans une image grand angle. Les résultats ont été présentés dans 5 conférences internationales [Moras et al., 2010, Moras et al., 2011a, Moras et al., 2011b, Moras et al., 2012, Kurdej et al., 2012] etle système expérimental a servi à la réalisation de démonstrations officielles dans le cadre du projet CityVIP à Paris et lors de la conférence IEEE Intelligent Vehicles Symposium 2011 en Allemagne.The research presented in this thesis focuses on the problem of the perception of the urban environment which is complex and dynamic in the presence of noisy and incomplete exteroceptive measurements obtained from on-board sensors. The problem is formalized in terms of sensor data fusion with a spatial representation of the environment. This work has been carried out for the autonomous navigation of intelligent vehicles within the national project ANR CityVIP. After having considered various formalisms to represent uncertainty, a fusion of spatio-referenced grids managing uncertainty with belief functions is studied. This system is capable of merging multi-layers and multi-echoes lidar measurements, obtainedat different time indexes to build a dynamic local map as a discrete evidential occupancy grid. The main advantages of belief functions are, firstly, to represent explicitly ignorance, which reduces the assumptions and therefore avoid introducing wrong a priori information and, secondly, to easily use conflicting information to determine the dynamics of the scene such as movements of the cells. The formalism of evidential occupancy grids is then presented in details and two multi-layers and multi-echos lidar sensor models are proposed. The propagation of the information through geometrical transformations is formalized in a similar way of image transformation framework. Then, the implementation of the approach is described and the injection of prior geographic information is finally investigated. Most of the works presented have been implemented in real time on a vehicle and many tests in real conditions have been realized. The results of these researches were presented through five international conferences [Moras et al., 2010, Moras et al., 2011a, Moras et al., 2011b, Moras et al., 2012], [Kurdej et al., 2012] and the experimental vehicle was presented at the official demonstration project CityVIP in Paris and at the IEEE Intelligent Vehicles Symposium 2011, in Germany.COMPIEGNE-BU (601592101) / SudocSudocFranceF
Mémoires d'Anne Marie de Moras Comtesse de Corbon
No full textSign.: []\p1\s, A-D\p12\s, E\p8\s, F\p2\sAntepPort. con grab. xilPort. con grav. xi
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Electronic properties and photoelectron circular dichroism of adsorbed chiral molecules
No full textWe report on an angle-resolved photoemission investigation of the valence states and chiral properties of a nonchirally oriented phase of tartaric acid deposited on a Cu(110) surface, observed with circularly polarized light. The two optical enantiomers R,R and S,S of tartaric acid, separately deposited, produce (40,23) overlayers which show a large dichroic effect and enantiomeric behavior all over the valence energies. The dichroic effects are displayed by native chiral molecular states and molecule-copper interface states. Density-functional theory calculations of the site-resolved density of states analyze the formation of hybrid states at the tartaric acid-copper interface and suggest that an observed interface state acquires chirality on binding.Fil: Ferrari, L.. Consiglio Nazionale delle Ricerche; ItaliaFil: Moras, P.. Consiglio Nazionale delle Ricerche; ItaliaFil: Gori, P.. Consiglio Nazionale delle Ricerche; Italia. Università di Roma; ItaliaFil: Turchini, S.. Consiglio Nazionale delle Ricerche; ItaliaFil: Zema, N.. Consiglio Nazionale delle Ricerche; ItaliaFil: Palma, A.. Consiglio Nazionale delle Ricerche; ItaliaFil: Fujii, J.. Consiglio Nazionale delle Ricerche; ItaliaFil: Vobornik, I.. Consiglio Nazionale delle Ricerche; ItaliaFil: Alejandro, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. The Abdus Salam. International Centre For Theoretical Physics; ItaliaFil: Catone, D.. Consiglio Nazionale delle Ricerche; ItaliaFil: Prosperi, T.. Consiglio Nazionale delle Ricerche; ItaliaFil: Carbone, C.. Consiglio Nazionale delle Ricerche; Itali
Camp, Las Moras C.S.A. : near Fort Clark, Texas, March 1861
No full textDetailed study of Confederate troops and Mexicans opening supply boxes taken from a Union covered wagon, drinking and changing clothes.Signed lower left: C.J. Iwonski fel. 1861.Title inscribed in brown ink above image.Inscribed in pencil upper right: This was the first war sketch recd by Harpers. Inscribed in pencil below title: Following the surrender of Genl. Twiggs.Inscribed on supply boxes: Q[uarter] M[aster] D[epot].Former U.S. Troops enroute to occupy forts as Confederate soldiers, according to Harper's.Published in: Harper's Weekly, 15 June 1861, p. 375, as: Bivouac of Confederate Troops on the Las Moras, Texas with Stolen U.S. Wagons, Etc.-Sketched by a Member of the Corps.Source unknown
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Scholarly Communication and Publishing Lunch and Learn Talk #11: The ULS Open Access Author Fee Fund
No full textAt the May 2014 talk, you will learn about the ULS Open Access Author Fee Fund--what it is, why we do it, how it works, and how the program is going so far
- …
