1,721,315 research outputs found
Left ventricular venting for extracorporeal life support in pheochromocytoma: Letter to the Editor – response
No full textMesh-based camera pairs selection and occlusion-aware masking for mesh refinement
Full text linkMany Multi-View-Stereo algorithms extract a 3D mesh model of a scene, after fusing depth maps into a volumetric representation of the space. Due to the limited scalability of such representations, the estimated model does not capture fine details of the scene. Therefore a mesh refinement algorithm is usually applied; it improves the mesh resolution and accuracy by minimizing the photometric error induced by the 3D model into pairs of cameras. The choice of these pairs significantly affects the quality of the refinement and usually relies on sparse 3D points belonging to the surface. Instead, in this paper, to increase the quality of pairs selection, we exploit the 3D model (before the refinement) to compute five metrics: scene coverage, mutual image overlap, image resolution, camera parallax, and a new symmetry term. To improve the refinement robustness, we also propose an explicit method to manage occlusions, which may negatively affect the computation of the photometric error. The proposed method takes into account the depth of the model while computing the similarity measure and its gradient. We quantitatively and qualitatively validated our approach on publicly available datasets against state of the art reconstruction methods
Attributional retraining and achievement goals: An exploratory study on theoretical and empirical relationship/Reconversion attributionnelle et buts d'accomplissement: une contribution exploratoire de leurs liens theoriques et empiriques
No full textIntroduction Achievement goals and attribution theory are theoretically and empirically linked, but existing literature lacks to explore the link between achievement goals and attributional retraining (AR), a motivational intervention based on the causal attribution theory. Objective(s) The aims of this field study were to determine the effectiveness of an AR treatment aimed to restructure college studentsâ dysfunctional causal explanations of poor performance and to explore whether achievement goals are predictive of the use of adaptive causal attributions. Methods Studentsâ achievement goals orientation and causal attributions were assessed and AR treatment was provided to a sample of second-year college students with maladaptive attributional schemas. Results Findings confirmed the effectiveness of AR treatment in restructuring self-defeating stable attributional explanations and suggested that achievement goals are implicated in the adoption of adaptive causal dimensions. Conclusion The importance of integrating the two discussed theoretical models in order to provide efficacious AR interventions with students at risk is discussed
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Pander Society Newsletter 2015
No full textWelcome to the 2015 edition of the Pander Society Newsletter, my sixth attempt at providing news
and a list of conodont publications for the past year!
I apologize for the tardy release of this issue due to several concurrent causes that, I hope, will
be neutralized by the early publication of the 2016 Newsletter.
Our community has suffered profound losses in conodont studies with the passing of great
figures.
Dick Aldridge (whose memorial appeared in the previous newsletter) was Chief Panderer and a
Pander medallist. He had been one of the foremost palaeontologists globally, having been chairman of
the International Palaeontological Association.
Anita Harris, ‘inventor’ of the Colour Alteration Index (CAI), has been one of the brightest
minds in the world of conodonts. Her generosity in sending CAI standards to those who requested one,
allowed the application of her method to the collections of all of us.
Glen Merrill, a renowned specialist mainly on multielement taxonomy of Carboniferous
conodonts, was one of the first to propose that conodont distributions were environmentally
controlled.
We learned only recently about the premature passing of Vladimir Prokopievich Tarabukin in
July 2013. His early studies were on biostratigraphy and Devonian conodonts of eastern Yakutia; his
later studies focused on Ordovician biostratigraphy and conodonts of northeast Asia. His Ordovician
conodonts enabled him to hypothesise reconstructions of the complicated fold systems of the eastern
Siberian Platform.
The year 2014 saw proliferation of research on conodonts in all perspectives of biostratigraphy,
palaeoecology, palaeogeography, ontogeny and taxonomy, the last fruitfully on apparatus
reconstructions and geochemistry, all aired in formal and informal meetings of the Pander Society.
The first formal meeting of the year was the Pander Society Workshop foreshadowed in the
2014 Newsletter, was held in Bologna in February 2014. It was professionally organized by Claudia
(Spalletta) for proposing, inter alia, planning for the next International Conodont Symposium (ICOS-
4) to be held in Valencia, Spain, in 2017. During that event Maria Corriga was awarded a Hinde
medal.
The second formal Pander Society meeting was held in Vancouver, British Columbia (Canada)
in October 2014 in association with the Geological Society of America. The session, sponsored by the
Paleontological Society and the Pander Society and organized by Charles Henderson, focused on
conodonts as stratigraphic and palaeoclimatic tools.
The 4th annual meeting of the IGCP 591, hosted in Estonia in June 2014, was organized jointly
with the Department of Geology of the University of Tartu, the Institute of Geology of the
Tallinn University of Technology, and with support from the Geological Society of Estonia. It
targeted evolutionary palaeoecology and palaeobiogeography. The event brought together a large
number of conodont specialists as did the 2014 Field Workshop of IGCP 591 in Kunming (China) in
August 2014 jointly with ISOS and ISCS, whose formal theme was ‘Global Events and their
relationships in the Early to Middle Paleozoic’.
No dedicated Pander Society meeting was organized during the 4th International
Palaeontological Congress in Mendoza, Argentina, between the end September and early October
2014. Nevertheless much research dealing with conodonts was presented in several sessions.
In Provo, Utah, in the presence of family and friends, David Clark was awarded the Pander
Society medal by Ray Scott. David “was one of the international leaders in modern conodont research
and played an outstanding role as researcher and teacher” as written in one of the letters supporting his
nomination. The ceremony took place on 13 September at David’s home and was given a re-run in the
3
field close to an Ordovician section. I thank Ray Scott for bestowing the Pander medal on my behalf.
Because I could not attend all meetings, I am grateful to each of you who provided information
that I could insert in the newsletter. I thank those who urged partners in work as well as masters and
PhD students to join the Pander Society. I also thank all those who sent changes of addresses and emails
of colleagues.
Thank you for sending in your contributions! Thanks also to Susana Garcia-Lopez, John
Repetski and Wang Cheng-Yuan for deliberating on nominations for the Society's medals.
I am always grateful to Claudia Spalletta and Myriam Matteucci for helping me generate this
newsletter. Special thanks go to Myriam for her enormous help in assembling the entire bibliography
and providing the version in EndNote of this year’s entries. Thanks also to John Talent for cleaning up
my ‘Italish’
AUTOEFFICACIA E BENESSERE PSICOLOGICO E LAVORATIVO DEGLI INSEGNANTI IN TEMPO DI COVID-19
No full textSpatial Temporal Transformer Network for Skeleton-Based Action Recognition
Full text linkSkeleton-based human action recognition has achieved a great interest in recent years, as skeleton data has been demonstrated to be robust to illumination changes, body scales, dynamic camera views, and complex background. Nevertheless, an effective encoding of the latent information underlying the 3D skeleton is still an open problem. In this work, we propose a novel Spatial-Temporal Transformer network (ST-TR) which models dependencies between joints using the Transformer self-attention operator. In our ST-TR model, a Spatial Self-Attention module (SSA) is used to understand intra-frame interactions between different body parts, and a Temporal Self-Attention module (TSA) to model inter-frame correlations. The two are combined in a two-stream network which outperforms state-of-the-art models using the same input data on both NTU-RGB+D 60 and NTU-RGB+D 120
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