showing 36 of ~574560 from 574555 documents
Pregnancy-associated breast cancer as a screening and diagnostic challenge
2021
C−C Cross-Couplings from a Cyclometalated Au(III) C∧ N Complex: Mechanistic Insights and Synthetic Developments
2021
Abstract In recent years, the reactivity of gold complexes was shown to extend well beyond π‐activation and to hold promises to achieve selective cross‐couplings in several C−C and C−E (E=heteroatom) bond forming reactions. Here, with the aim of exploiting new organometallic species for cross‐coupling reactions, we report on the Au(III)‐mediated C(sp2)−C(sp) occurring upon reaction of the cyclometalated complex [Au(CCH2N)Cl2] (1, CCH2N=2‐benzylpyridine) with AgPhCC. The reaction progress has been monitored by NMR spectroscopy, demonstrating the involvement of a number of key intermediates, whose structures have been unambiguously ascertained through 1D and 2D NMR analyses (1H, 13C, 1H‐1H CO…
Industry Emergence between Technology and Zeitgeist
2021
Abstract This chapter examines the dynamics of industry emergence using the case of the blockchain and crypto (BC) industry. The BC industry is a rapidly developing field that has—in less than a decade—transformed from initially being a volunteer project of a small group of cypherpunks to a global industry with a plethora of actors involving vivid entrepreneurial and corporate activity. Importantly, the review of the extant literature and evidence reveals that ideological driving forces, which have been neglected in prior industry emergence research, constitute a major catalyst of this rapid industry development. In this vein, the chapter shows that the ideological notion of ‘decentralizati…
Le bureau-chambre de Jacques Copeau, une hétérotopie patrimoniale
2021
International audience
‘We hugged each other during the cold nights’: the role of affect in an anti-deportation protest network in Finland
2021
This article analyses the role of affect and emotions in Finland’s first large-scale anti-deportation protest, the 2017 Right to Live protest in Helsinki. Despite deportation protests having recently gained scholarly attention, their emotional dimensions have not been sufficiently studied, especially as concerns the emotions of protestors with vulnerable legal status. This article is based on in-depth interviews with key activists in the anti-deportation protest network in Finland, including asylum seekers, refugees and Finnish citizens. The article argues that in order for the protest of asylum seekers facing the threat of deportation to become public and visible, it was important that cit…
false
2021
BackgroundExecutive functions underlie self-regulation and are thus important for physical activity and adaptation to new situations. The aim was to investigate, if yearlong physical and cognitive training (PTCT) had greater effects on physical activity among older adults than physical training (PT) alone, and if executive functions predicted physical activity at baseline, after six (6m) and twelve months (12m) of the interventions, one-year post-intervention follow-up and an extended follow-up during COVID-19 lockdown.MethodsData from a single-blinded, parallel-group randomized controlled trial (PASSWORD-study, ISRCTN52388040) were utilized. Participants were 70–85 years old community-dwel…
Sea Wave Energy. A Review of the Current Technologies and Perspectives
2021
The proposal of new technologies capable of producing electrical energy from renewable sources has driven research into seas and oceans. Research finds this field very promising in the future of renewable energies, especially in areas where there are specific climatic and morphological characteristics to exploit large amounts of energy from the sea. In general, this kind of energy is referred to as six energy resources: waves, tidal range, tidal current, ocean current, ocean thermal energy conversion, and saline gradient. This review has the aim to list several wave-energy converter power plants and to analyze their years of operation. In this way, a focus is created to understand how many …
Reduction in Acute Limb Ischemia With Rivaroxaban Versus Placebo in Peripheral Artery Disease After Lower Extremity Revascularization: Insights From …
2021
Background: Patients with peripheral artery disease (PAD) are at heightened risk of acute limb ischemia (ALI), a thrombotic event associated with amputation, disability, and mortality. Previous lower extremity revascularization (LER) is associated with increased ALI risk in chronic PAD. However, the pattern of risk, clinical correlates, and outcomes after ALI early after LER are not well-studied, and effective therapies to reduce ALI post-LER are lacking. Methods: The VOYAGER PAD trial (Vascular Outcomes Study of ASA [Acetylsalicylic Acid] Along With Rivaroxaban in Endovascular or Surgical Limb Revascularization for PAD; rNCT02504216) randomized patients with PAD undergoing LER to rivaroxa…
« En difficulté » : lieu-dit de la complexité à enseigner la natation pour des professeurs des écoles
2021
International audience
Dinosaurian survivorship schedules revisited: new insights from an age‐structured population model
2021
Little is known of dinosaur population biology due to insufficient information on age‐dependent fecundities and mortalities. So far, survivorship curves (SC) of only six dinosaurs (four tyrannosaurs, one ceratopsian, one hadrosaur) have been erected from bone assemblages of aged specimens. They indicate high survival throughout most of their life with presumably higher mortalities after hatching and increasing mortalities towards its end. However, none of these studies recognized that to infer a reliable SC for a taxon, the assemblage must preserve a stationary age distribution (i.e. one which is stable, with constant population size over time as overall fecundities match mortalities, herea…
Effective strategies for promoting physical activity through the use of digital media among school-age children: A systematic review
2021
Digital media are widespread among school-age children, and their incorrect use may lead to an increase in sedentary levels and the consequences associated with it. There are still few studies that have investigated whether physical activity levels could be increased through their use. The aim of this study was to systematically review the scientific literature in order to identify whether digital strategies and technologies are capable of increasing the level of physical activity. A literature search was performed using the following databases: Pubmed, Scopus, and Web of Science. The main outcomes evaluated the increase in physical activity levels, the number of steps, and the reduction of…
Novel Isolated Multiple-Input Buck-Boost DC-DC Converter for Renewable Energy Sources
2021
An isolated multiple input dc-dc converter (MIC) with unidirectional buck-boost characteristics and simultaneous power transfer is proposed for multi-sources in renewable energy systems in this paper. When compared to existing isolated MICs, the proposed MIC significantly reduces the component count and control complexity since it requires a fixed coupled inductor with only one primary and secondary winding each for any number of inputs and does not require any phase-shifted pulse-width modulation. The operation of the proposed converter for simultaneous power transfer from multiple sources with varying voltages is numerically verified in simulation and validated on OPAL-RT’s OP5700 hardwar…
Experimental Comparative Analysis of Efficiency and THD for a Three-phase Five-level Cascaded H-Bridge Inverter Controlled by Several MC-PWM Schemes
2021
Cascaded H-Bridges Multilevel Inverters are an innovative and promising solution in different application fields. This topology allows obtaining an improvement in the performance (e.g. reduced harmonic content, the low voltage stress on power components, and high efficiency) in respect to the traditional two-level inverters. In this context, the Multicarrier-PWM strategies play an important role thanks to their features. This paper presents an experimental investigation on the performance of a three-phase five-level Cascaded H-Bridge inverter by using different PWM modulation strategies. In particular, the paper is focused on the experimental validation of the main features of Multicarrier …
Pourquoi trouve-t-on des entrepreneurs d'opportunités dans des secteurs associés à l'entrepreneur de nécessité
2021
International audience
Touriste classique versus touriste durable, les nouvelles figures du touriste de demain
2021
National audience
El terco oficio de lucidez en los ecopoemas: breves apuntes acerca del poemarioCon los ojos abiertos de Jorge Riechmann
2021
La obra del poeta español Jorge Riechmann (Madrid, 1962) impone considerar y enfrentar con lucidez la cuestión imperiosa del “Nuevo Régimen Climático” (Bruno Latour). Ante la urgencia ecológica los poemarios de Riechmann exigen una toma de conciencia. Su escritura se abre camino entre las rocas de las certezas y la ceguera que gobiernan nuestro arrogante siglo XXI. Ante los retos socio ecológicos y las nuevas formas de violencia que asolan nuestro mundo contemporáneo, el poeta “cumple con su parte”: “La poesía y el arte no pueden casi nada: pero ese casi nada es esencial no dejar de intentarlo” (Tuits para el siglo de la Gran Prueba). El poemario Con los ojos abiertos (ecopoemas 1985-2006),…
Protein, creatine and dieting supplements among adolescents: Use and associations with eating disorder risk factors, exercise- and sports participati…
2021
Objective: This study aimed to estimate the number of weekly users of protein, creatine, and dieting supplements and to explore whether weekly use was related to eating disorder (ED) risk factors, exercise, sports participation, and immigrant status.Methods: In total, 629 and 1,060 high school boys and girls, respectively, self-reported weekly frequency of protein, creatine, and dieting supplement use, and weight and shape concerns, appearance internalization and pressure, self-esteem, mental distress, physical activity level, exercise context, and the type and weekly frequency of sport played. Multiple hierarchical regression analyses were performed to investigate explanatory factors for s…
Comparative Hybrid Hartree-Fock-DFT Calculations of ReO3, SrTiO3, BaTiO3, PbTiO3 and CaTiO3 (001) Surfaces
2021
A Hybrid Energy Storage Sizing for a Vertical Take-off and Landing Electric Aircraft
2021
The energy storage sizing procedure for an all-electric aircraft, characterised by vertical take-off and landing (VTOL), is presented in the paper. In order to define the energy consumption, the propulsion system model has been developed and simulated, referring to a specific configuration of VOLT obtained by the transformation of a very light twin-propeller aircraft named Tecnam P2012 T. Specifically, a flight mission-oriented to air city taxing has been considered. The simulation results highlight the presence of significant peak power during take-off and landing. At the aim of optimising the weight and the volume of the energy storage systems (ESSs), considered a critical issue in all-el…
Les épées nord-alpines au Ha A : typologie et chronologie
2021
International audience; Alors que les épées à poignée métallique du Hallstatt A, essentiellement représentées par les épées dites à fusée à trois bourrelets (« Dreiwulstschwerter »), se comptent par centaines entre l’arc alpin et le Danube ainsi que le bassin des Carpates, à peine plus d’une vingtaine sont connues dans la partie occidentale du continent (France, Belgique et Pays-Bas). Ce contraste explique en partie les différences constatées entre l’état des recherches sur ce type d’arme en Europe centrale et centre-orientale, région relativement bien étudiée, et en Europe occidentale où aucune synthèse n’a à ce jour été produite. Nous nous proposons ici de combler cette lacune en présenta…
Chapter 7. Pronunciation learning strategies
2021
Dynamiques spatio-temporelles de la vigne (Vitis vinifera) au cours de l’Holocène en France d’après les enregistrements archéobotaniques (graines et …
2021
International audience; Le vin joue un rôle économique et culturel capital depuis l’âge du Fer en France. Dès cette époque, la viticulture s’implante dans le Midi méditerranéen puis va progressivement se diffuser dans la zone tempérée. L’archéologie a bien montré à quel point le Haut-Empire romain représente une étape clé dans cette diffusion (Poux et al. 2011). Cependant, les différents marqueurs à disposition de l’archéologie culturelle et spatiale (aménagements, structures, mobiliers) sont généralement limités à des fenêtres chrono-géographiques particulières. Changeant en fonction du contexte technique, culturel et environnemental, aucun ne permet véritablement de suivre l’expansion de …
Franquismo 3.0: las ilustraciones de Miguel Brieva en el Diccionario del franquismo de Manuel Vázquez Montalbán
2021
International audience; Quien no haya visto nunca al Caudillo androide o un parque temático en honor al Generalísimo ─“Franquilandia”─ lo podrá hacer en la nueva edición del Diccionario del franquismo de Manuel Vázquez Montalbán ilustrado por Miguel Brieva (Sevilla, 1974) que publicó Anagrama en colaboración con el Ayuntamiento de Barcelona. Quien no lo haya hecho y no lo tema… pues esta esperpéntica experiencia resulta hondamente incómoda y espeluznante quizás por lo certera que es. Esta edición tiene como primer punto de articulación la colisión de dos temporalidades: la de la redacción del texto en 1977, en plena Transición, y el contrapunto del momento político actual (cuarenta años des…
Nurses’ strategies for dealing with stress during the COVID-19 pandemic
2021
Background: In view of the SARS-CoV-2 coronavirus pandemic, it is important to study the activities undertaken by nurses to cope with stress. Aim of the study: The study’s main objective was to analyze strategies of coping with stress among nurses working in public and non-public medical institutions in Opolskie and Lubelskie provinces, Poland, during the COVID-19 pandemic. Material and methods: The study group included a total of 155 nurses. The Mini-COPE questionnaire and the author’s original questionnaire were used in the study. Results: With increasing age, nurses coped with stress by using their sense of humor less often, seeking instrumental support, discharge of emotions, using psyc…
Optimization Strategies for the Anodic Phenol‐Arene Cross‐Coupling Reaction
2021
Optical Fiber Based Dosimeter Data From RADEF Pulsed Electron Beams - Oscilloscope Traces
2021
These data are from tests of fiber optic based dosimetry systems. The purpose of the collected data is to use it for characterizing the different tested samples responses against pulsed electron radiation, for different electron bunch sizes. The tested samples are sol-gel silica glass rods doped with Ce, Cu, or Gd ions, making the rods radioluminescent. The samples were connected to a multimode pure-silica core optical fiber, which transported the radiation induced luminescence (RIL) to a photomultiplier tube (PMT) with an optical band pass filter in front of it. The samples were subject to a pulsed 20 MeV electron beam. The resulting output pulses from the PMT from the induced RIL light we…
Microscopic interactions between ivermectin and key human and viral proteins involved in SARS-CoV-2 infection
2021
The identification of chemical compounds able to bind specific sites of the human/viral proteins involved in the SARS-CoV-2 infection cycle is a prerequisite to design effective antiviral drugs. Here we conduct a molecular dynamics study with the aim to assess the interactions of ivermectin, an antiparasitic drug with broad-spectrum antiviral activity, with the human Angiotensin-Converting Enzyme 2 (ACE2), the viral 3CLpro and PLpro proteases, and the viral SARS Unique Domain (SUD). The drug/target interactions have been characterized in silico by describing the nature of the non-covalent interactions found and by measuring the extent of their time duration along the MD simulation. Results …
Prediction of Disease–lncRNA Associations via Machine Learning and Big Data Approaches
2021
This chapter introduces long non-coding RNAs and their role in the occurrence and progress of diseases. The discovery of novel lncRNA-disease associations may provide valuable input to the understanding of disease mechanisms at the lncRNA level, as well as to the detection of biomarkers for disease diagnosis, treatment, prognosis, and prevention. Unfortunately, due to costs and time complexity, the number of possible disease-related lncRNAs verified by traditional biological experiments is very limited. Computational approaches for the prediction of potential disease-lncRNA associations can effectively decrease the time and cost of biological experiments. We first review the main computatio…
Présentation de l'UMR Agroécologie et du pôle GEAPSI
2021
National audience
Potential of Automated Digital Hemispherical Photography and Wireless Quantum Sensors for Routine Canopy Monitoring and Satellite Product Validation
2021
To better characterize the temporal dynamics of vegetation biophysical variables, a variety of automated in situ measurement techniques have been developed in recent years. In this study, we investigated automated digital hemispherical photography (DHP) and wireless quantum sensors, which were installed at two sites under the Copernicus Ground Based Observations for Validation (GBOV) project. Daily estimates of plant area index (PAI) and the fraction of absorbed photosynthetically active radiation (FAPAR) were obtained, which realistically described expected vegetation dynamics. Good correspondence with manual DHP and LAI-2000 data (RMSE = 0.39 to 0.90 for PAI, RMSE = 0.07 for FAPAR) provid…
Repeatability and sensitivity of passive mechanical stiffness measurements in the triceps surae muscle‐tendon complex
2021
Measurements of muscle-tendon unit passive mechanical properties are often used to illustrate acute and chronic responses to a training stimulus. The purpose of this study was to quantify the inter-session repeatability of triceps surae passive stiffness measurements in athletic and non-athletic populations, with the view to discussing its usefulness both as a muscle-tendon profiling tool and a control measure for studies with multiple data collection sessions. The study also aimed to observe the effects of quiet standing on passive stiffness parameters. Twenty-nine men (10 cyclists, nine triathletes, 10 controls) visited the laboratory on three separate occasions, where passive stiffness t…
Illegitimate tasks, job crafting and their longitudinal relationships with meaning of work
2021
The aims of this study were twofold: first, to investigate whether illegitimate tasks and job crafting are associated longitudinally with meaning of work, and, second, to explore whether job crafti...
Linking Microstructural Integrity and Motor Cortex Excitability in Multiple Sclerosis
2021
Motor skills are frequently impaired in multiple sclerosis (MS) patients following grey and white matter damage with cortical excitability abnormalities. We applied advanced diffusion imaging with 3T magnetic resonance tomography for neurite orientation dispersion and density imaging (NODDI), as well as diffusion tensor imaging (DTI) in 50 MS patients and 49 age-matched healthy controls to quantify microstructural integrity of the motor system. To assess excitability, we determined resting motor thresholds using non-invasive transcranial magnetic stimulation. As measures of cognitive-motor performance, we conducted neuropsychological assessments including the Nine-Hole Peg Test, Trail Makin…
Tendencies in ABO3 Perovskite and SrF2, BaF2 and CaF2 Bulk and Surface F-Center Ab Initio Computations at High Symmetry Cubic Structure
2021
This research was partly funded by the Latvian Council of Science project No. LZP‐ 2020/2‐0009 (for R. Eglitis), as well as the ERAF Project No. 1.1.1.1/18/A/073. We express our gratitude for the financial support from Latvian–Ukraine cooperation Project No. Latvia–Ukraine LV‐ UA/2021/5. The Institute of Solid State Physics, University of Latvia (Latvia), as the Centre of Excellence has received funding from the European Unions Horizon 2020 Framework Pro‐ gramme H2020‐WIDESPREAD01‐2016‐2017‐Teaming Phase2 under Grant Agreement No. 739508, project CAMART2.
Prises de décisions et dilemmes en situation d'interaction évaluative orale dans trois classes de CP
2021
International audience
Opening a Conversation on Open Communication Research
2021
Abstract Many disciplines have been debating and enacting a range of policies, procedures, and practices that fall under the umbrella term “open research” or “open science.” Following the publication of “An Agenda for Open Science in Communication”, we invited communication scholars to continue the conversation on what open research practices broadly might mean for our diverse field. Specifically, we sought work that: looked empirically at the need for and impact of open research practices; considered the unintended consequences of calls for open research practices broadly; and that reflected on what such a move would mean for qualitative and humanistic communication research. We hope the c…