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1. Stability of attractor local dimension estimates in non-Axiom A dynamical systems

Author

Pons, Flavio, Messori, Gabriele, Faranda, Davide, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Extrèmes : Statistiques, Impacts et Régionalisation (ESTIMR), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Uppsala Universitet [Uppsala], Stockton University (Stockton), London Mathematical Laboratory, European Project: 948309,CENAE - EXCELLENT SCIENCE - European Research Council (ERC), European Project: 101003469,XAIDA, and European Project: 956396,EDIPI

Subjects
[STAT]Statistics [stat], statistical estimation, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, Extreme value theory, [NLIN.NLIN-CD]Nonlinear Sciences [physics]/Chaotic Dynamics [nlin.CD], Hausdorff dimension, [NLIN]Nonlinear Sciences [physics], local attractor dimension
Abstract

We study different extreme value theory (EVT)-based estimators for the local Hausdorff dimension (also known as local attractor dimension) of dynamical systems. The attractor dimension is an important quantity related to the number of effective degrees of freedom of the underlying dynamical system, and its estimation has been a central topic in the dynamical systems literature since the 80s. The framework considered here combines the analysis of recurrences in phase space with EVT to estimate the local attractor dimension in the neighborhood of a state of interest. While the EVT framework enables the analysis of highdimensional complex systems, such as the Earth's climate, its applicability relies on robust statistical parameter estimation for the assumed extreme value distribution. In this study

Published
2023

2. A journey towards the forbidden zone: a new, cold, UHP unit in the Dora-Maira Massif(Western Alps)

Author

Manzotti, Paola, Schiavi, F., Nosenzo, Francesco, Pitra, Pavel, Ballèvre, Michel, Stockton University (Stockton), Université Clermont Auvergne (UCA), Stockholm University, Géosciences Rennes (GR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), Czech Geological Survey [Praha], Società Geologica Italiana, and Dubigeon, Isabelle

Subjects
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics, [SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics, chloritoid, [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography, [SDU.STU.PE] Sciences of the Universe [physics]/Earth Sciences/Petrography, Dora-Maira, coesite
Abstract

International audience; The distribution of ultrahigh-pressure metamorphism (UHP) at the scale of a mountain belt is of primeimportance for deciphering its past subduction history. In the Western Alps, coesite has been recognized in thesouthern Dora-Maira massif, in the lens-shaped Brossasco-Isasca Unit, but has not been found up to now inthe other parts of the massif. We report the discovery of a new UHP unit in the northern Dora-Maira Massif(Western Alps), named Chasteiran Unit. It is only a few tens of metres thick and consists of garnet-chloritoidmicaschists. Garnet inclusions (chloritoid, rutile) and its growth zoning allow to precisely model the P-Tevolution. Coesite crystals, which are pristine or partially transformed to palisade quartz occur as inclusionsin the garnet outer cores. According to thermodynamic modelling, garnet displays a continuous record ofgrowth during the prograde increase in P and T (25-27 kbar 470-500°C) (stage 1), up to the coesite stabilityfield (27-28 kbar 520-530°C) (stage 2), as well as sub-isothermal decompression of about 10 kbar (down to15 kbar 500-515°C) (stage 3). The main regional, composite, foliation, marked by chloritoid and rutile, beganto develop during this stage, and was then overprinted by chlorite-ilmenite (stage 4). The Chasteiran Unit isdiscontinuously exposed in the immediate hangingwall of the Pinerolo Unit, and it is located far away from,and without physical links to the classic UHP Brossasco-Isasca Unit. Moreover, it records a different, muchcolder, P-T evolution, showing that different slices were detached from the downgoing subduction slab. TheChasteiran Unit is the fourth and the coldest Alpine UHP unit known so far in the entire Alpine belt. Its P-Tconditions are comparable to the ones of the Tian Shan coesite-chloritoid-bearing rocks.

Published
2022
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3. The mighty force: statistical inference and high-dimensional statistics

Author

Aurell, Erik, Barbier, Jean, Decelle, Aurélien, Mulet, Roberto, Stockton University (Stockton), Abdus Salam International Centre for Theoretical Physics [Trieste] (ICTP), Laboratoire de Recherche en Informatique (LRI), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire des Sciences du Numérique (LISN), Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), TAckling the Underspecified (TAU), Inria Saclay - Ile de France, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Interdisciplinaire des Sciences du Numérique (LISN), Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Universidad Complutense de Madrid = Complutense University of Madrid [Madrid] (UCM), University of Havana (Universidad de la Habana) (UH), and A.D. was supported by the Comunidad de Madrid and the Complutense University of Madrid (Spain) through the Atracción de Talento program (Ref. 2019-T1/TIC-13298).

Subjects
[PHYS.COND.CM-DS-NN]Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn], [PHYS.COND.CM-SM]Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech]
Abstract

International audience; This is a review to appear as a contribution to the edited volume "Spin Glass Theory & Far Beyond - Replica Symmetry Breaking after 40 Years", World Scientific. It showcases a selection of contributions from the spin glass community at large to high-dimensional statistics, by focusing on three important graph-based models and methodologies having deeply impacted the field: inference of graphs (a.k.a. direct coupling analysis), inference from graphs (the community detection problem), and the dynamic cavity method, which in particular allows for inference from graphs encoding causal relations.

Published
2022
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4. Suspended sediment fluxes in a shallow macrotidal estuary

Author

Susanne Moskalski, France Floc'h, Romaric Verney, Stockton University (Stockton), Laboratoire Géosciences Océan (LGO), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), IFREMER - Laboratoire Provence Azur Corse, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), and Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010504 meteorology & atmospheric sciences, Forcing (mathematics), 010502 geochemistry & geophysics, Oceanography, Atmospheric sciences, Residual, 01 natural sciences, Physics::Geophysics, Physics::Fluid Dynamics, symbols.namesake, Flux (metallurgy), Geochemistry and Petrology, Brittany, 14. Life underwater, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, Physics::Atmospheric and Oceanic Physics, 0105 earth and related environmental sciences, Stokes drift, geography, geography.geographical_feature_category, sediment flux decomposition, Lead (sea ice), Sediment, Geology, Estuary, Estuarine processes, 6. Clean water, estuaries, Water level, Europe, estuarine processes, symbols, Sediment flux decomposition, Estuaries
Abstract

Residual suspended sediment flux in estuaries is dependent on water level, velocity, and suspended sediment concentration (SSC), but complex interactions between these variables and other forcing mechanisms can lead to drastic differences in the magnitude and direction of sediment flux. The goal of this study was to quantify residual suspended sediment flux in a shallow, macrotidal estuary, and to determine its most important forcing mechanisms, using the Dyer flux decomposition equation and a simplified analytical model. Water level, velocity, and acoustic backscatter were measured in the Aulne River estuary in Brittany, France, and acoustic backscatter converted to SSC. The vertical tide was slightly flood dominant near the mouth, but strongly flood dominant upstream. Velocity was ebb dominant throughout the estuary. The magnitude and direction of total residual suspended sediment flux changed with position in the estuary and seasonally. The Eulerian flux was dominant at the mouth, but the tidal pumping and Stokes drift components increased in importance landward. Residual suspended sediment flux in the Aulne is dependent on several processes in addition to those included in the simplified model. The strong spring-neap control and tidal resuspension of sediments in the Aulne and the presence of higher-order tidal velocity terms contribute in a non-negligible way to residual suspended sediment flux. Finally, all of the first five components of the Dyer flux decomposition equation are needed to accurately represent residual suspended sediment flux in the Aulne.

Published
2020
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5. Buried Paleosols as Reference Objects for Assessing the Current Level of Soil Pollution with Lead in the Lower Volga Steppes

Author

Frédéric Candaudap, Anne Probst, Tatiana Pampura, Markus Meili, K. Holm, Russian Academy of Science, Institute of physicochemical and biological Problems of Soil Science, Stockholm University, Stockton University (Stockton), Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France, Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD), Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Centre National d'Études Spatiales - CNES (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Institut de Recherche pour le Développement - IRD (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Météo France (FRANCE), Russian academy of sciences (RUSSIA), Stockholm University (SWEDEN), and Observatoire Midi-Pyrénées - OMP (Toulouse, France)

Subjects
Steppe, [SDE.MCG]Environmental Sciences/Global Changes, Paleoenvironmental reconstruction, Soil Science, Soil lead, 010501 environmental sciences, 01 natural sciences, Anthropogenic lead, Soil lead forms, Lead of atmospheric deposition, Lead (geology), [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, Stable lead isotopes, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, 0105 earth and related environmental sciences, Earth-Surface Processes, geography, geography.geographical_feature_category, Significant difference, Géochimie, 04 agricultural and veterinary sciences, Paleosol, Soil contamination, [SDE.ES]Environmental Sciences/Environmental and Society, Current (stream), 13. Climate action, Environmental chemistry, Paleosol lead, Soil water, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Environmental science, Environnement et Société
Abstract

International audience; The estimation of soil contamination with anthropogenic lead requires uncontaminated analogues of the recent soils for comparison. For this purpose, a paleosol buried under a 2-m high burial mound of the Bronze Age and protected by it from atmospheric deposition during 4500 years was studied. The content and isotopic composition of mobile and total lead in the buried and recent soils (roadside and remote from lead sources) were compared. Obvious signs of anthropogenic contamination were revealed in only the upper layer of the roadside soil within 10 m from a highway. These were an increase in the absolute content of all lead forms; a high relative content of mobile forms; high ratios of Pb relative to Ti, Zr, and Y; and the similarity between isotopic compositions of the soil lead and the lead from modern atmospheric aerosols and Russian gasoline. Interestingly, no significant difference was found in the total lead contents or in the isotopic compositions between the recent soil remote from roads and the buried soil. However, some signs of anthropogenic impact could be revealed by the analysis of mobile lead forms, which make up a small portion of the total content.

Published
2019
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6. Suicide among Italian adolescents: 1970–2002

Author

Marco Innamorati, Maurizio Pompili, Monica Vichi, Roberto Tatarelli, Nicola Vanacore, David Lester, Maria Masocco, Department of Psychiatry, Sant'Andrea Hospital, Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], McLean Hospital [Belmont, Ma.], National Centre for Epidemiology, Surveillance and Health Promotion (CNESPS), Italian National Institute of Health (ISS), The Richard Stockton College of New Jersey, Stockton University (Stockton), and Università Europea di Roma

Subjects
Male, medicine.medical_specialty, Adolescent, Poison control, Adolescents, Suicide prevention, Occupational safety and health, 03 medical and health sciences, Sex Factors, 0302 clinical medicine, ddc:150, Residence Characteristics, Cause of Death, Epidemiology, Injury prevention, Developmental and Educational Psychology, Child and adolescent psychiatry, Psychology, Humans, Medicine, 030212 general & internal medicine, Sex Distribution, Suicide, Italy, Psychological Disorders, Mental Health Treatment and Prevention, business.industry, Age Factors, Human factors and ergonomics, General Medicine, 16. Peace & justice, 030227 psychiatry, 3. Good health, Psychiatry and Mental health, Psychologie, Socioeconomic Factors, psychische Störungen, Behandlung und Prävention, Adolescent Behavior, Pediatrics, Perinatology and Child Health, Female, Residence, business, Demography
Abstract

International audience; The purpose of the present study was to analyze sex and regional differences in the suicide rate of adolescents and the methods they used for suicide in Italy during the period 1970–2002. Temporal trends and regional variations in suicide for Italian adolescents were retrieved from the Italian database on mortality for the period 1970–2002, collected by the Italian Census Bureau and processed by the Italian National Institute of Health-Statistics Unit. In the period 1970–2002, 3,069 adolescent suicides were monitored in Italy. Analyses of these suicides identified significant differences by region of residence and sex. Males were 2.1 times more likely than females to kill themselves. Male and female suicides had inverse trends in the years analyzed, so that the sex difference at the present time is the result of a continuous increase in male suicides and a decrease in female suicides since 1970. The dramatic peaks observed over the time period studied cannot be attributed to a single cause, indicating that further studies are needed to better understand the phenomenon.

Published
2009
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7. Greening The Ocean Economy: A Progress Report

Author

Pendleton, Linwood H., Jungwiwattanaporn, Megan, Beaudoin, Yannick, Neumann, Christian, Solgaard, Anne, Cavaliere, Christina, Baker, Elaine, Aménagement des Usages des Ressources et des Espaces marins et littoraux - Centre de droit et d'économie de la mer (AMURE), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Nicholas School of the Environment, Duke University [Durham], Stockton University (Stockton), Hance D. Smith, Juan Luis Suárez de Vivero, Tundi S. Agardy, Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS), and Julien, Séverine

Subjects
Global ocean economy, Economic development, People, IMO, Sustainable, [SHS.ECO]Humanities and Social Sciences/Economics and Finance, [SDE.ES]Environmental Sciences/Environmental and Society, FAO, Marine management, IUCN, World Fish Center, Blue World, Impacts, Ocean ecosystems, UNDP, [SDE.ES] Environmental Sciences/Environmental and Society, Human welfare, GRID-Arendal, [SHS.ECO] Humanities and Social Sciences/Economics and Finance, UNDESA
Abstract

International audience; The way we manage our global ocean economy continues to evolve. While new research clearly shows the importance of ocean ecosystems to people (Barbier et al., 2011), other evidence clearly depicts an ocean in decline (Pandolfi et al., 2003; Pauly et al., 2005; Worm et al., 2006). In response, the United Nations Environment Program along with organizations including UNDESA, UNDP, IMO, FAO, IUCN, GRID-Arendal and World Fish Center have promoted a new effort in relation to marine management and economic development that applies a green economy approach to the Blue World (UNEP et al., 2012). This approach seeks to change economic and industrial behavior to reduce impacts on the marine environment and in turn increase human welfare by carefully balancing the environmental, economic, and social capital that are required to support a sustainable, ecosystem-based approach to marine economic activity.

Published
2015

9. The lithostratigraphy of the Les Echets basin, France: tentative correlation between cores

Author

Veres, Daniel, Wohlfarth, Barbara, Andrieu-Ponel, Valérie, Björck, Svante, de Beaulieu, Jacques-Louis, Digerfeldt, Gunnar, Ponel, Philippe, Ampel, Linda, Gandouin, Emmanuel, Belmecheri, Soumaya, Stockton University (Stockton), Institut Méditerranéen d'Ecologie et de Paléoécologie (IMEP), Université Paul Cézanne - Aix-Marseille 3-Centre National de la Recherche Scientifique (CNRS)-Avignon Université (AU)-Université de Provence - Aix-Marseille 1, Lund University [Lund], Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université Paul Cézanne - Aix-Marseille 3-Université de Provence - Aix-Marseille 1-Avignon Université (AU)-Centre National de la Recherche Scientifique (CNRS), and Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDE]Environmental Sciences
Abstract

International audience; Two new long sediment cores (EC1 and EC3), recovered from different locations within the infilled basin at Les Echets, France, provide a new high‐resolution record of terrestrial and lacustrine responses to climatic changes during Marine Isotope Stages (MIS) 3 and 2. The lithologies of the cores are described in detail and correlated with each other by stratigraphic marker horizons, fluctuations in organic matter and AMS radiocarbon ages. The tentative correlation of the new cores to those described and analysed by de Beaulieu et al. (1980) and de Beaulieu & Reille (1984a) provides a preliminary chronostratigraphic framework. Sedimentation during MIS3 started with accumulation of sands and silts and was followed by alternating gyttja and clayey gyttja silts. Exceptionally high sedimentation rates during MIS2 led to the infilling of the basin. Alternating organic‐rich and minerogenicrich sediments appear to coincide with changes in pollen assemblages (de Beaulieu & Reille 1984a) and suggest that millennial‐scale climatic changes controlled lake productivity and catchment stability during most of MIS3.

Published
2007
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10. Leveraging the Power of a Twitter Network for Library Promotion

Author

Jason Shulman, Daniel Tomé, Jewelry Yep, Office of Service Learning, and Stockton University (Stockton)

Subjects
Computer science, media_common.quotation_subject, [SDV]Life Sciences [q-bio], 05 social sciences, Twitter, Information Dissemination, Library and Information Sciences, 050905 science studies, Education, Follower, World Wide Web, Outreach, Social media, Promotion (rank), Ranking, Influence, Institution, Key (cryptography), Position (finance), Metrics, 0509 other social sciences, Networks, 050904 information & library sciences, media_common
Abstract

WOS:000352176200008; International audience; The Twitter network of two academic libraries was analyzed to determine the influential accounts that connect to them. Such information can be exploited by libraries to create tailored social media outreach and information dissemination programs. Three network metrics, measuring different definitions of importance, were calculated for each account in the network. This allowed for the quantification and ranking of the accounts by influence/importance, normally considered to be qualitative and subjective. By all measures, accounts associated with the institutions, and not faculty, staff, or students, were found to be the most influential players in the networks of both libraries, suggesting that this is a general feature of academic library Twitter networks. Furthermore, the library, as an institutional account itself, is also influential to the broader Twitter community of its home institution. This demonstrates that the library is in a key position to propagate information from sister accounts at the institution. (C) 2014 The Authors. Published by Elsevier Inc.

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11. Early evolution of small body size in Homo floresiensis.

Author

Kaifu Y, Kurniawan I, Mizushima S, Sawada J, Lague M, Setiawan R, Sutisna I, Wibowo UP, Suwa G, Kono RT, Sasaki T, Brumm A, and van den Bergh GD

Subjects
Animals, Indonesia, Humerus anatomy & histology, Phylogeny, Body Size, Fossils, Hominidae anatomy & histology, Biological Evolution, Tooth anatomy & histology
Abstract

Recent discoveries of Homo floresiensis and H. luzonensis raise questions regarding how extreme body size reduction occurred in some extinct Homo species in insular environments. Previous investigations at Mata Menge, Flores Island, Indonesia, suggested that the early Middle Pleistocene ancestors of H. floresiensis had even smaller jaws and teeth. Here, we report additional hominin fossils from the same deposits at Mata Menge. An adult humerus is estimated to be 9 - 16% shorter and thinner than the type specimen of H. floresiensis dated to ~60,000 years ago, and is smaller than any other Plio-Pleistocene adult hominin humeri hitherto reported. The newly recovered teeth are both exceptionally small; one of them bears closer morphological similarities to early Javanese H. erectus. The H. floresiensis lineage most likely evolved from early Asian H. erectus and was a long-lasting lineage on Flores with markedly diminutive body size since at least ~700,000 years ago., (© 2024. The Author(s).)

Published
2024
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12. Orthorexia nervosa in gay men-the result of a spanish-polish eating disorders study.

Author

Karniej P, Pérez J, Juárez-Vela R, Santolalla-Arnedo I, Gea-Caballero V, Del Pozo-Herce P, Dissen A, and Czapla M

Subjects
Male, Humans, Orthorexia Nervosa, Poland, Health Behavior, Feeding Behavior, Surveys and Questionnaires, Feeding and Eating Disorders epidemiology, Sexual and Gender Minorities
Abstract

Background: The purpose of this exploratory study was to identifying demographic factors and unique predictors of ON e.g., the use of pre-exposure prophylaxis (PrEP), the use of social media and the Grindr ® dating application among a sample group of Spanish and Polish identifying gay men., Methods: The study was conducted in Poland and Spain between March and June 2021 using questionary: ORTO-15. Data was collected using a three-section self-administered questionnaire. The first section contained demographic data, the second part was the Polish and Spanish version of the Orto-15, and the third part was the Polish and Spanish version of the EAT-26., Results: Total enrollment was 394 gay men. In regression proportional hazards single model, significant predictors of ON were: age (OR = 0.964, 95% CI, 0.944-0.984), BMI (OR = 0.895, 95% CI, 0.848-0.944), staying in an informal relationship compared to being single (OR = 2.138, 95%CI, 1.225-3.732), occasional use of Pre-exposure Prophylaxis (OR = 4.667, 95%CI, 1.186-18.362) and use of the Grindr application (OR = 5.312, 95%CI, 3.373-8.365). Instagram users had lower risk of ON (OR = 0.479, 95%CI, 0.279-0.822). The multivariate analysis showed that Grindr usages (OR = 4.72; 95%CI, 2.89-7.72) correlated with higher risk of ON. Higher BMI (OR = 0.913, 95%CI, 0.861-0.98) and daily use of Pre-exposure Prophylaxis (OR = 0.142, 95%CI, 0.03-0.674) is associated with lower risk of ON., Conclusions: The most important predictors of orthorexia nervosa in gay men are: low BMI and the use of Grindr. The effect of daily usage of PrEP is associated with lower risk, and occasional use is associated with increased risk, of orthorexia nervosa., (© 2023. The Author(s).)

Published
2023
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13. The effect of dietary nitrate on exercise capacity in chronic kidney disease: a randomized controlled pilot study.

Author

Ramick MG, Kirkman DL, Stock JM, Muth BJ, Farquhar WB, Chirinos JA, Doulias PT, Ischiropoulos H, and Edwards DG

Subjects
Adult, Aged, Beta vulgaris chemistry, Cross-Over Studies, Dietary Supplements, Double-Blind Method, Exercise Test drug effects, Female, Fruit and Vegetable Juices, Humans, Male, Middle Aged, Muscle, Skeletal drug effects, Pilot Projects, Exercise Tolerance drug effects, Nitrates therapeutic use, Renal Insufficiency, Chronic diet therapy
Abstract

Background: Chronic Kidney Disease (CKD) patients exhibit a reduced exercise capacity that impacts quality of life. Dietary nitrate supplementation has been shown to have favorable effects on exercise capacity in disease populations by reducing the oxygen cost of exercise. This study investigated whether dietary nitrates would acutely improve exercise capacity in CKD patients., Methods and Results: In this randomized, double-blinded crossover study, 12 Stage 3-4 CKD patients (Mean ± SEM: Age, 60 ± 5yrs; eGFR, 50.3 ± 4.6 ml/min/1.73 m 2 ) received an acute dose of 12.6 mmol of dietary nitrate in the form of concentrated beetroot juice (BRJ) and a nitrate depleted placebo (PLA). Skeletal muscle mitochondrial oxidative function was assessed using near-infrared spectroscopy. Cardiopulmonary exercise testing was performed on a cycle ergometer, with intensity increased by 25 W every 3 min until volitional fatigue. Plasma nitric oxide (NO) metabolites (NOm; nitrate, nitrite, low molecular weight S-nitrosothiols, and metal bound NO) were determined by gas-phase chemiluminescence. Plasma NOm values were significantly increased following BRJ (BRJ vs. PLA: 1074.4 ± 120.4 μM vs. 28.4 ± 6.6 μM, p < 0.001). Total work performed (44.4 ± 10.6 vs 39.6 ± 9.9 kJ, p = 0.03) and total exercise time (674 ± 85 vs 627 ± 86s, p = 0.04) were significantly greater following BRJ. Oxygen consumption at the ventilatory threshold was also improved by BRJ (0.90 ± 0.08 vs. 0.74 ± 0.06 L/min, p = 0.04). These changes occurred in the absence of improved skeletal muscle mitochondrial oxidative capacity (p = 0.52) and VO 2peak (p = 0.35)., Conclusions: Our findings demonstrate that inorganic nitrate can acutely improve exercise capacity in CKD patients. The effects of chronic nitrate supplementation on CKD related exercise intolerance should be investigated in future studies., (Copyright © 2020 Elsevier Inc. All rights reserved.)

Published
2021
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14. Death depression in Egyptian clinical and non-clinical groups.

Author

Abdel-Khalek AM, Dadfar M, and Lester D

Subjects
Anxiety epidemiology, Cross-Sectional Studies, Egypt epidemiology, Female, Humans, Male, Anxiety Disorders, Depression epidemiology
Abstract

Aim: The main aims of this study were to explore the differences between seven Egyptian clinical and non-clinical samples in death depression, as well as to estimate gender-related differences., Design: A cross-sectional study., Methods: The Death Depression Scale (DDS) was administered to seven groups ( N  = 765) of Egyptian normal (non-clinical) patients, anxiety outpatients, schizophrenic inpatients (men and women) and addicts (men only) in individual sessions., Results: Anxiety outpatients of both sexes obtained significantly and greatly higher death depression scores than did the other five groups, whereas the male schizophrenics, the male addicts, and the male and female non-clinical groups had the lowest death depression scores. Female schizophrenics obtained a significantly higher death depression scores than did male schizophrenics, addicts and non-clinical participants. Female anxiety outpatients and schizophrenics had higher death depression mean scores than did their male counterparts., Discussion: The present finding is consistent, in general, with previous studies on death anxiety and death obsession. What applied to death anxiety was consistent also with death depression and death obsession. That is, the death distress concept., Competing Interests: The authors declare that there is no funding source, and they have no conflict of interest regarding the publication of this paper., (© 2020 The Authors. Nursing Open published by John Wiley & Sons Ltd.)

Published
2020
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