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 Last 7 days     Results 41-60 of 1243.   1 2 3 4 5 6 7 8   « De l’uso frequentato si fan norme ». L’Italie au XVIe siècle, entre normalité et normativitéValenti, Gianluca in Valenti, Gianluca; Miesse, Hélène (Eds.) « Modello, regola, ordine ». Parcours normatifs dans l’Italie du Cinquecento (in press)Detailed reference viewed: 19 (0 ULiège) Evidence for Auroral Emissions from Callisto's Footprint in HST UV ImagesBhattacharyya, Dolon; Clarke, John T.; Montgomery, Jordan et alin Journal of Geophysical Research. Space Physics (in press)Auroral emissions are expected from the footprint of Callisto in Jupiter's upper atmosphere owing to the known interaction of its atmosphere with Jupiter's magnetosphere, and from the observed auroral ... [more ▼]Auroral emissions are expected from the footprint of Callisto in Jupiter's upper atmosphere owing to the known interaction of its atmosphere with Jupiter's magnetosphere, and from the observed auroral emissions from the footprints of the other three Galilean satellites. The mapping of Callisto along modeled magnetic field lines at Jupiter, however, places the expected footprint at the same latitude as the main auroral emissions, making it difficult to detect. We analyzed ultraviolet images of Jupiter taken using the HST/ACS instrument during a large observing campaign in 2007. Using a co-addition method similar to one used for Enceladus, we have identified a strong candidate for the footprint of Callisto on May 24, 2007. We tested this finding by applying the same co-addition technique to a nearly identical auroral configuration on May 30, 2007 when Callisto was behind Jupiter, not visible from Earth (CML = 22°; sub-Callisto system III longitude = 327°). By comparing the two co-added images, we can clearly see the presence of a strongly sub-corotating spot close to the expected Callisto footprint location on 24th May and its absence on 30th May. On the 24th Callisto was located in the current sheet. We also found a probable candidate on 26th May 2007 during which time Callisto was positioned below the current sheet. The measured location and intensity of the auroral emission provides important information about the interaction of Callisto with Jupiter's magnetic field, the corotating plasma, and the neutral and ionized state of the thin atmosphere of Callisto. [less ▲]Detailed reference viewed: 15 (1 ULiège) Incunabula Namurcensia. Catalogue des incunables conservés à la Bibliothèque universitaire Moretus Plantin de l’Université de Namur et à la Bibliothèque du Centre de Documentation et de Recherche Religieuses (Namur)Adam, Renaud Book published by Presses universitaires Namur (in press)Detailed reference viewed: 10 (0 ULiège) Was ist der Platz des Menschen im Kosmos? Darwinismus und angelsächsischer NeuhegelianismusLejeune, Guillaume in Hegel-Jahrbuch (in press)Detailed reference viewed: 6 (0 ULiège) Indice dei nomiMiesse, Hélène in F. Guicciardini, Le lettere, vol. XI (in press)Detailed reference viewed: 20 (0 ULiège) El personaje transficcional en el mundo hispánicoFrancois, Jeromine ; Ceballos Viro, Alvaro Book published by Presses Universitaires de Liège (in press)Detailed reference viewed: 11 (0 ULiège) Random size-assortative mating despite size-dependent fecundity in a Neotropical amphibian with explosive reproductionSzékely, Diana ; Székely, Paul; Denoël, Mathieu et alin Ethology (in press)Sexual selection theory predicts that, when body size is correlated with fecundity, there should be fitness advantages for mate choice of the largest females. Moreover, because larger males are expected ... [more ▼]Sexual selection theory predicts that, when body size is correlated with fecundity, there should be fitness advantages for mate choice of the largest females. Moreover, because larger males are expected to monopolize the largest females, this should result in an assortative mating based on body size. Although such patterns could be expected in both explosive and prolonged breeders, non-assortative mating should be more widespread in species under time constraints. However, patterns of sexual selection are largely unexplored in explosive breeding species, and contrasting patterns have been found previously. We expect that the active choice of partners may be particularly risky when the time period during which sexual partners are available is severely limited. Therefore, to avoid missing an entire reproductive act, males and females should pair irrespective of traits, such as body size. We tested this hypothesis by investigating the mating patterns of the Pacific horned toad, Ceratophrys stolzmanni, a short-lived fossorial species inhabiting Neotropical dry forests. This species is particularly adequate to test our prediction because it reproduces explosively over the course of a single night per year. Although the number of eggs laid was proportional to the size of females, and individuals of both sexes showed variation in body size, there was no assortative mating based either on size, body condition or age of mates. Egg size was not influenced by either female size or clutch size. The larger body size of females compared to males is likely due to fecundity selection, i.e. the selective pressure that enhances reproductive output. Although we cannot dismiss the possibility that individuals could select their partners based on other criteria than those related to size or age, the results fit well our prediction, showing that the explosive breeding makes improbable an active choice of partners in both sexes and therefore favours a random mating pattern. [less ▲]Detailed reference viewed: 40 (2 ULiège) CelestinaFrancois, Jeromine in Durán López, Fernando; Romero Ferrer, Alberto; Amann, Elizabeth (Eds.) et al La mitificación del pasado español. Reescrituras de figuras y leyendas en la literatura del siglo XIX (in press)Detailed reference viewed: 4 (0 ULiège) IntroducciónFrancois, Jeromine ; Ceballos Viro, Alvaro in Francois, Jeromine; Ceballos Viro, Alvaro (Eds.) El personaje transficcional en el mundo hispánico (in press)Detailed reference viewed: 10 (0 ULiège) A recent history of science cases for interferometryDefrere, Denis ; Aerts, C.; Kishimoto, M. et alin Experimental Astronomy: Astrophysical Instrumentation and Methods (in press), 1801Optical long-baseline interferometry is a unique and powerful technique for astronomical research. Since 2004, optical interferometers have produced an increasing number of scientific papers covering ... [more ▼]Optical long-baseline interferometry is a unique and powerful technique for astronomical research. Since 2004, optical interferometers have produced an increasing number of scientific papers covering various fields of astrophysics. As current interferometric facilities are reaching their maturity, we take the opportunity in this paper to summarize the conclusions of a few key meetings, workshops, and conferences dedicated to interferometry. We present the most persistent recommendations related to science cases and discuss some key technological developments required to address them. In the era of extremely large telescopes, optical long-baseline interferometers will remain crucial to probe the smallest spatial scales and make breakthrough discoveries. [less ▲]Detailed reference viewed: 9 (4 ULiège) Les incrustations en coquille de Mari. Nouvelles données sur les panneaux figuratifs incrustés au Proche-Orient à l’âge du Bronze ancienCouturaud, Barbara Book published by Brepols (in press)Detailed reference viewed: 15 (0 ULiège) Engineering RNA-binding proteins by modular assembly of RanBP2-type Zinc FingersDe Franco, Simona; O'Connell, Mitchell; Vandevenne, Marylène in Liu, Jia (Ed.) Methods in Molecular Biology: Engineered Zinc Finger Proteins: Methods and Protocols. (in press)Detailed reference viewed: 14 (0 ULiège) Agroforestry for ruminants: a review of trees and shrubs as fodder in silvopastoral temperate and tropical production systemsVandermeulen, Sophie; Ramirez Restrepo, Carlos; Beckers, Yves et alin Animal production science (in press)Among the oldest agroforestry systems, silvopastoralism uses shrubs and trees to feed ruminants. The practice is common in extensive livestock production systems, while the intensification of grass-based ... [more ▼]Among the oldest agroforestry systems, silvopastoralism uses shrubs and trees to feed ruminants. The practice is common in extensive livestock production systems, while the intensification of grass-based systems in the past century has led to the removal of woody species from agricultural temperate landscapes. In Europe however, woody species are promoted again on grasslands through environment-friendly policies due to the ecosystem services they provide such as carbon sequestration, control of soil erosion, limitation of air-borne pollutants and biodiversity conservation. Positive effects of browse on rumen digestion and parasite control have also been documented across different plant species and regions. Under optimal conditions, feeding ruminants from woody fodder sustains animal production. Nonetheless, limitations can restrict the use of woody forage into animal diets, such as the presence of anti-nutritive and toxic compounds. The incorporation of this resource in ruminant feeding systems raises the question of the management of the interface between the plant and the animal. Various management systems are practiced. Temperate species such as Salix spp. and Populus spp. are fed to sheep and cattle in fodder blocks or by pruning trees in New Zealand, and Fraxinus spp. or Corylus avellana in hedgerows supply forage to livestock in Belgium, while Leucaena leucocepahala and Desmanthus spp. browsing is common in Australia. Nowadays, ensiling and pelleting techniques are being developed as a way to store browse forage. As the renewed interest in using shrubs and trees to feed ruminants is recent, especially in temperate regions, additional research about introducing optimally this resource within systems is needed. [less ▲]Detailed reference viewed: 11 (0 ULiège) Validated assessment of gait sub-phase durations in older adults using an accelerometer-based ambulatory systemBoutaayamou, Mohamed ; GILLAIN, Sophie ; Schwartz, Cédric et alin Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2018) (in press)Validated extraction of gait sub-phase durations using an ambulatory accelerometer-based system is a current unmet need to quantify subtle changes during the walking of older adults. In this paper, we ... [more ▼]Validated extraction of gait sub-phase durations using an ambulatory accelerometer-based system is a current unmet need to quantify subtle changes during the walking of older adults. In this paper, we describe (1) a signal processing algorithm to automatically extract not only durations of stride, stance, swing, and double support phases, but also durations of sub-phases that refine the stance and swing phases from foot-worn accelerometer signals in comfortable walking of older adults, and (2) the validation of this extraction using reference data provided by a gold standard system. The results show that we achieve a high agreement between our method and the reference method in the extraction of (1) the temporal gait events involved in the estimation of the phase/sub-phase durations, namely heel strike (HS), toe strike (TS), toe-off (TO), maximum of heel clearance (MHC), and maximum of toe clearance (MTC), with an accuracy and precision that range from ‒3.6 ms to 4.0 ms, and 6.5 ms to 12.0 ms, respectively, and (2) the gait phase/sub-phase durations, namely stride, stance, swing, double support phases, and HS to TS, TO to MHC, MHC to MTC, and MTC to HS sub-phases, with an accuracy and precision that range from ‒4 ms to 5 ms, and 9 ms to 15 ms, respectively, in comfortable walking of a thirty-eight older adults ( (mean ± standard deviation) 71.0 ± 4.1 years old). This demonstrates that the developed accelerometer-based algorithm can extract validated temporal gait events and phase/sub-phase durations, in comfortable walking of older adults, with a promising degree of accuracy/precision compared to reference data, warranting further studies. [less ▲]Detailed reference viewed: 17 (2 ULiège) The use of a β-lactamase – based conductimetric biosensor assay to detect biomolecular interactionsVandevenne, Marylène ; Dondelinger, Mathieu; Yunus, Sami et alin Journal of visualized experiments (in press)Detailed reference viewed: 15 (1 ULiège) The path towards high-contrast imaging with the VLTI: the Hi-5 projectDefrere, Denis ; Absil, Olivier ; Berger, J.-P. et alin Experimental Astronomy: Astrophysical Instrumentation and Methods (in press), 1801The development of high-contrast capabilities has long been recognized as one of the top priorities for the VLTI. As of today, the VLTI routinely achieves contrasts of a few 10$^{-3}$ in the near-infrared ... [more ▼]The development of high-contrast capabilities has long been recognized as one of the top priorities for the VLTI. As of today, the VLTI routinely achieves contrasts of a few 10$^{-3}$ in the near-infrared with PIONIER (H band) and GRAVITY (K band). Nulling interferometers in the northern hemisphere and non-redundant aperture masking experiments have, however, demonstrated that contrasts of at least a few 10$^{-4}$ are within reach using specific beam combination and data acquisition techniques. In this paper, we explore the possibility to reach similar or higher contrasts on the VLTI. After reviewing the state-of-the-art in high-contrast infrared interferometry, we discuss key features that made the success of other high-contrast interferometric instruments (e.g., integrated optics, nulling, closure phase, and statistical data reduction) and address possible avenues to improve the contrast of the VLTI by at least one order of magnitude. In particular, we discuss the possibility to use integrated optics, proven in the near-infrared, in the thermal near-infrared (L and M bands, 3-5 $\mu$m), a sweet spot to image and characterize young extra-solar planetary systems. Finally, we address the science cases of a high-contrast VLTI imaging instrument and focus particularly on exoplanet science (young exoplanets, planet formation, and exozodiacal disks), stellar physics (fundamental parameters and multiplicity), and extragalactic astrophysics (active galactic nuclei and fundamental constants). Synergies and scientific preparation for other potential future instruments such as the Planet Formation Imager are also briefly discussed. [less ▲]Detailed reference viewed: 6 (0 ULiège) Aux frontières de la fiction : l’avatar comme opérateur de réflexivitéDelbouille, Julie ; Barnabé, Fanny in Sciences du jeu (in press), 9Whether considered as an activity (play) or as a system of rules (game), video games are marked by reflexivity : playing requires the adoption of a distanciated (Henriot, 1969) and metacommunicative ... [more ▼]Whether considered as an activity (play) or as a system of rules (game), video games are marked by reflexivity : playing requires the adoption of a distanciated (Henriot, 1969) and metacommunicative attitude (Bateson, 1977), and video games use a plethora of metadiscursive processes (metalepsis, mise en abyme and mirror effect). This connexion between reflexivity and game is particularly clear when considering the avatar : by bringing together an empirical player and a fictional character, this « enveloppe pilotable » (controllable shell ; Amato et Perény, 2013) works as a deixis. As a natural entry point to the fictional world, the avatar continually signifies the loss and the recovery of our control over the game, thus interrogating the player’s posture. The frequency of reflexive figures in video games and the avatar’s pivotal role in these processes question the way video games can build a narration. Because they can interrupt the construction of the fictional world in order to generate a discourse on the game itself, these figures could indeed be seen as disrupting the figurative power of the game. In order to shed some light on the mechanisms behind the transgression of the boundaries of the fictional world and their function in articulating the game and the fiction, this paper will analyze these formal mechanisms through three distinct games : Portal (Valve Corporation, 2007), The Stanley Parable (Galactic Cafe, 2013) and INSIDE (Playdead, 2016). They have in common a mise en abyme of the player’s relationship to the machine through their avatar (and their respective relationship with GlaDOS in Portal, the Narrator in The Stanley Parable and with the second avatar in INSIDE). In these three games, the playable characters are the operators of a metadiscourse that – while constantly breaking the fourth wall to speak to the empirical player – actually constitutes the foundation of the narration itself. [less ▲]Detailed reference viewed: 12 (1 ULiège) Le Sublime Enclos. Parcs nationaux américains et paratopies d’écrivainsDi Gregorio, Luca Book published by Quodlibet (in press)Detailed reference viewed: 17 (0 ULiège) The Fight against Atomism and Pluralism. A Note on the Hegelian Legacy in BradleyLejeune, Guillaume in Rosaye, JEan-Paul; Marshall, C. (Eds.) L'idéalisme britannique (in press)Detailed reference viewed: 10 (0 ULiège) Instinkt oder Entschluss? Anfang des Philosophierens bei Kant, Descartes und BradleyLejeune, Guillaume in Asmuth, Christoph; Rasmussen, Jespers (Eds.) Anfang der Philosophie (in press)Detailed reference viewed: 12 (0 ULiège)