178,363 research outputs found
R. M. Ogilvie, A Commentary on Livy. Books I-V., 1965
No full textLaugier Jean-Louis. R. M. Ogilvie, A Commentary on Livy. Books I-V., 1965. In: Revue des Études Anciennes. Tome 71, 1969, n°1-2. pp. 197-199
Quantitative Ultrasound of Cortical Bone in the Femoral Neck Predicts Femur Strength: Results of a Pilot Study
No full textArticle first published online: 15 JAN 2013 Pour consulter la version éditeur DOI: 10.1002/jbmr.1742A significant risk of femoral neck (FN) fracture exists for men and women with an areal bone mineral density (aBMD) higher than the osteoporotic range, as measured with dual-energy X-ray absorptiometry (DXA). Separately measuring the cortical and trabecular FN compartments and combining the results would likely be a critical aspect of enhancing the diagnostic capabilities of a new technique. Because the cortical shell determines a large part of FN strength a novel quantitative ultrasound (QUS) technique that probes the FN cortical compartment was implemented, aimed at testing the sensitivity of the method to variations of FN cortical properties and FN strength. Nine femurs (women, mean age 83 years) were subjected to QUS to measure the through transmission time-of-flight (TOF) at the FN and mechanical tests to assess strength. Quantitative computed tomography (QCT) scans were performed to enable analysis of the dependence of TOF on bone parameters. DXA was also performed for reference. An ultrasound wave propagating circumferentially in the cortical shell, which TOF was not influenced by the properties of the trabecular compartment Q3, was measured in all specimens. Averaged TOF for nine FN measurement positions/orientations was significantly correlated to strength (R² = 0.79) and FN cortical QCT variables: total BMD (R² = 0.54); regional BMD in the inferoanterior (R² = 0.90) and superoanterior (R² = 0.57) quadrants; and moment of inertia (R² = 0.71). The results of this study demonstrate that QUS can perform a targeted measurement of the FN cortical compartment. Because the method involves mechanical guided waves, the QUS variable is related to the geometric and material properties of the cortical shell (cortical thickness, tissue elasticity, and porosity). This work opens the way to a multimodal QUS assessment of the proximal femur, combining our approach targeting the cortical shell with the existing modality sensitive to the trabecular compartment. In vivo feasibility of our approach has to be confirmed with experimental data in patients
Henri Laugier (dir.), La promotion humaine dans les pays sous-développés
No full textB. R. Henri Laugier (dir.), La promotion humaine dans les pays sous-développés. In: Tiers-Monde, tome 2, n°5, 1961. pp. 127-128
Henri Laugier (dir.), La promotion humaine dans les pays sous-développés
No full textB. R. Henri Laugier (dir.), La promotion humaine dans les pays sous-développés. In: Tiers-Monde, tome 2, n°5, 1961. pp. 127-128
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
"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.
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
Quali competenze del FLE nell'ambito del progetto didattico Tableau blanc inter-actif/inter-culturel
No full textCon un'idea di progettualità metodologica riguardo alla didattica del Français Langue Étrangère l'obiettivo è di coniugare le nuove esigenze sociali caratterizzate dall'intercultura a quelle didattiche che da un ventennio si sottopongono all'attenzione di studiosi e si presentano nella realtà scolastico-universitaria europea. Si tratta di un panorama di utenze sempre più multietniche nei confronti delle quali si rende necessario, in una società fortemente informatizzata, offrire competenze nuove tramite i più avanzati strumenti di applicazione didattica. Il Tableau blanc interactif – Lavagna Interattiva Multimediale – è uno strumento dinamico e interattivo, prezioso per una pratica didattica che vede la possibile realizzazione dell'apprendimento del FLE in contesto interculturale in cui sia previsto un numero di studenti abbastanza ampio. Queste variabili sono le due costanti su cui si basa la nostra analisi. Riteniamo che l'uso di questa lavagna interattiva possa agevolare e migliorare le difficoltà sorte dalle differenze non solo di tipo acquisizionale, ma anche e, soprattutto, culturale. Pertanto, delineeremo gli aspetti peculiari di questo supporto a una innovativa metodologia didattica, ne illustreremo obiettivi e metodi per favorire da un lato l'integrazione che si misura in apprendimento e, dall'altro, l'interazione, ossia le competenze che si possono acquisire in FLE attraverso la cooperazione
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