Relevant bibliographies by topics / Baleines à bec – Observations

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Baleines à bec – Observations'

Author: Grafiati
Published: 31 January 2023
Last updated: 31 July 2025

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Journal articles on the topic "Baleines à bec – Observations"

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Gérard, Odile, Craig Carthel, and Stefano Coraluppi. "Détection et classification automatique de signaux acoustiques de baleines à bec." Traitement du signal 33, no. 1 (2016): 73–94. http://dx.doi.org/10.3166/ts.33.73-94.

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Kun, E., Z. Keresztes, and L. Á. Gergely. "Slowly rotating Bose–Einstein condensate compared with the rotation curves of 12 dwarf galaxies." Astronomy & Astrophysics 633 (January 2020): A75. http://dx.doi.org/10.1051/0004-6361/201936504.

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Context. The high plateaus of the rotation curves of spiral galaxies suggest either that there is a dark component or that the Newtonian gravity requires modifications on galactic scales to explain the observations. We assemble a database of 12 dwarf galaxies, for which optical (R-band) and near-infrared (3.6 μm) surface brightness density together with spectroscopic rotation curve data are available, in order to test the slowly rotating Bose–Einstein condensate (BEC) dark matter model. Aims. We aim to establish the angular velocity range compatible with observations, bounded from above by the
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Kim, Sung-Min, and Hyun Mee Kim. "Forecast Sensitivity Observation Impact in the 4DVAR and Hybrid-4DVAR Data Assimilation Systems." Journal of Atmospheric and Oceanic Technology 36, no. 8 (2019): 1563–75. http://dx.doi.org/10.1175/jtech-d-18-0240.1.

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AbstractIn this study, the observation impacts on 24-h forecast error reduction (FER), based on the adjoint method in the four-dimensional variational (4DVAR) data assimilation (DA) and hybrid-4DVAR DA systems coupled with the Unified Model, were evaluated from 0000 UTC 5 August to 1800 UTC 26 August 2014. The nonlinear FER in hybrid-4DVAR was 12.2% greater than that in 4DVAR due to the use of flow-dependent background error covariance (BEC), which was a weighted combination of the static BEC and the ensemble BEC based on ensemble forecasts. In hybrid-4DVAR, the observation impacts (i.e., the
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Dutta, Koushik, Deep Ghosh, and Biswarup Mukhopadhyaya. "Improved treatment of bosonic dark matter dynamics in neutron stars: consequences and constraints." Journal of Cosmology and Astroparticle Physics 2024, no. 12 (2024): 053. https://doi.org/10.1088/1475-7516/2024/12/053.

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Abstract It is conceivable that a bosonic dark matter (DM) with non-gravitational interactions with SM particles will be accumulated at the center of a neutron star (NS) and can lead to black hole formation. In contrast to previous works with a fixed NS temperature, we dynamically determine the formation of Bose-Einstein condensate (BEC) for a given set of DM parameters, namely the DM-neutron scattering cross-section (σχn), the thermal average of DM annihilation cross-section (⟨σv⟩) and the DM mass (mχ). For both non-annihilating and annihilating DM with ⟨σv⟩ ≲ 10-26 cm3 s-1, the BEC forms for
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Castellanos, Elías, Celia Escamilla-Rivera, and Jorge Mastache. "Is a Bose–Einstein condensate a good candidate for dark matter? A test with galaxy rotation curves." International Journal of Modern Physics D 29, no. 09 (2020): 2050063. http://dx.doi.org/10.1142/s0218271820500637.

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We analyze the rotation curves that correspond to a Bose–Einstein Condensate (BEC)-type halo surrounding a Schwarzschild-type black hole to confront predictions of the model upon observations of galaxy rotation curves. We model the halo as a BEC in terms of a massive scalar field that satisfies a Klein–Gordon equation with a self-interaction term. We also assume that the bosonic cloud is not self-gravitating. To model the halo, we apply a simple form of the Thomas–Fermi approximation that allows us to extract relevant results with a simple and concise procedure. Using galaxy data from a subsam
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Davis, Benjamin, Xuguang Wang, and Xu Lu. "A Comparison of HWRF Six-Hourly 4DEnVar and Hourly 3DEnVar Assimilation of Inner Core Tail Dopper Radar Observations for the Prediction of Hurricane Edouard (2014)." Atmosphere 12, no. 8 (2021): 942. http://dx.doi.org/10.3390/atmos12080942.

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Six-hourly three-dimensional ensemble variational (3DEnVar) (6H-3DEnVar) data assimilation (DA) assumes constant background error covariance (BEC) during a six-hour DA window and is, therefore, unable to account for temporal evolution of the BEC. This study evaluates the one-hourly 3DEnVar (1H-3DEnVar) and six-hourly 4DEnVar (6H-4DEnVar) DA methods for the analyses and forecasts of hurricanes with rapidly evolving BEC. Both methods account for evolving BEC in a hybrid EnVar DA system. In order to compare these methods, experiments are conducted by assimilating inner core Tail Doppler Radar (TD
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Kay, Junkyung, and Xuguang Wang. "A Multiresolution Ensemble Hybrid 4DEnVar for Global Numerical Prediction." Monthly Weather Review 148, no. 2 (2020): 825–47. http://dx.doi.org/10.1175/mwr-d-19-0002.1.

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Abstract A multiresolution ensemble (MR-ENS) method is developed to resolve a wider range of scales of the background error covariance (BEC) in the hybrid four-dimensional ensemble–variational (4DEnVar) while saving computational costs. MR-ENS is implemented in the NCEP Global Forecast System (GFS) gridpoint statistical interpolation (GSI) hybrid 4DEnVar. MR-ENS generates analysis increment by incorporating high-resolution static BEC and flow-dependent ensemble BECs from both high and low resolutions. MR-ENS is compared with three 4DEnVar update approaches: 1) the single-resolution (SR)-Low ap
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Morawska, Alina, Michelle Adamson, and Joanne Ferriol Especkerman. "Mealtime Observations and Parent-Report: Correspondence Across Measurement and Implications for Intervention." Behaviour Change 32, no. 3 (2015): 175–89. http://dx.doi.org/10.1017/bec.2015.9.

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This study explored the relationship between self-reported and observed mealtime behaviour and examined concurrent predictors of observed child and parent mealtime behaviour. The sample consisted of 67 parents of 1.5- to 6-year-old children experiencing difficulties with their child's mealtime, and 33 parents who were not concerned with their child's mealtime behaviour. Parent-reported and observed mealtime data, and parent-reported mealtime cognitions were collected. Regression analyses indicated that consistent with hypotheses, observed and parent-reported mealtime behaviour were related. Ob
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Xie, Jiping, Roshin P. Raj, Laurent Bertino, Annette Samuelsen, and Tsuyoshi Wakamatsu. "Evaluation of Arctic Ocean surface salinities from the Soil Moisture and Ocean Salinity (SMOS) mission against a regional reanalysis and in situ data." Ocean Science 15, no. 5 (2019): 1191–206. http://dx.doi.org/10.5194/os-15-1191-2019.

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Abstract. Recently two gridded sea surface salinity (SSS) products that cover the Arctic Ocean have been derived from the European Space Agency (ESA)'s Soil Moisture and Ocean Salinity (SMOS) mission: one developed by the Barcelona Expert Centre (BEC) and the other developed by the Ocean Salinity Expertise Center of the Centre Aval de Traitement des Données SMOS at IFREMER (The French Research Institute for Exploitation of the Sea) (CEC). The uncertainties of these two SSS products are quantified during the period of 2011–2013 against other SSS products: one data assimilative regional reanalys
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Barthelemy, Dominique. "Une crise de l’écrit ? Observations sur des actes de Saint-Aubin d’Angers (XIe siècle)." Bibliothèque de l'école des chartes 155, no. 1 (1997): 95–117. http://dx.doi.org/10.3406/bec.1997.450860.

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Dissertations / Theses on the topic "Baleines à bec – Observations"

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Tournier, Martin. "Caractérisation et modélisation de l’habitat physique et biologique vertical des mammifères marins grands plongeurs." Thesis, La Rochelle, 2022. http://www.theses.fr/2022LAROS018.

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Les mammifères marins grands plongeurs évoluent dans un environnement tridimensionnel dans lequel les conditions physiques et biologiques varient. Les variations de ces conditions peuvent influencer leur utilisation de la dimension verticale. Les travaux de cette thèse s’appuient dans un premier temps sur le traitement du signal acoustique échantillonné par un échosondeur miniaturisé déployé sur des éléphants de mer austraux, pour apporter une caractérisation biologique inédite de la colonne d’eau. A travers ce signal acoustique ont pu être observés des organismes des niveaux trophiques interm
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Virgili, Auriane. "Modelling distributions of rare marine species : the deep-diving cetaceans." Thesis, La Rochelle, 2018. http://www.theses.fr/2018LAROS003/document.

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Les cétacés grands plongeurs, cachalots Physeteridae et Kogiidae, et baleines à bec Zipiidae, sont des espèces marines rares. Leur faible densité, aire de distribution étendue et faible disponibilité en surface génèrent de faibles taux d’observations. Cette particularité constitue un défi pour la modélisation d’habitat de ces espèces, préalable à leur conservation. Les modèles doivent gérer l’abondance de zéros qui limitent leur capacité à inférer des résultats écologiquement cohérents. Cette thèse vise donc à trouver une méthodologie adaptée aux jeux de données abondants en zéros, à détermine
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Patris, Julie. "Contributions en méthodes pour le suivi de mysticètes par acoustique passive." Electronic Thesis or Diss., Toulon, 2019. http://www.theses.fr/2019TOUL0016.

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La surveillance par acoustique passive est un outil d'importance croissante pour l'étude des mammifères marins. Cette thèse pose des nouveaux modèles pour l'étude du plus grand d'entre eux, la baleine bleue (Balaenoptera musculus), qui émet de très basses fréquences. Pour ce faire, nous avons enregistré un corpus inédit dans l'archipel de Humboldt au nord du Chili. Nos données révèlent un chant caractéristique de la baleine bleue 'chilienne', dont nous étudions la structure pulsée et l'évolution au cours des dernières décennies. Le classement en signal tonal ou non-tonal nous permet, en nous f
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Martins, Cristiane C. A. "Study of baleen whales’ ecology and interaction with maritime traffic activities to support management of a complex socio-ecological system." Thèse, 2012. http://hdl.handle.net/1866/10799.

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La gestion du milieu marin pour de multiples usages est une problématique de plus en plus en complexe. La création d’aires marines protégées (AMP) a été désignée comme étant une stratégie efficace afin de concilier la conservation avec les autres usages. Cependant, pour atteindre les objectifs de conservation, un plan de gestion bien défini de même qu’un programme de suivi efficace doivent être instaurés. En 1998, le parc marin du Saguenay–Saint-Laurent (PMSSL) a été créé afin de protéger plusieurs écosystèmes important de l’Estuaire du Saint-Laurent. Une industrie d’observation en mer de bale
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Book chapters on the topic "Baleines à bec – Observations"

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Leggett, A. J., and S. Zhang. "The BEC–BCS Crossover: Some History and Some General Observations." In The BCS-BEC Crossover and the Unitary Fermi Gas. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21978-8_2.

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Conference papers on the topic "Baleines à bec – Observations"

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Ainomae, Ahti, Tonu Trump, and Yannick Le Moullec. "Distributed Adaptive Largest Eigenvalue Detection with SNR Weighted Observations." In 2018 16th Biennial Baltic Electronics Conference (BEC). IEEE, 2018. http://dx.doi.org/10.1109/bec.2018.8600974.

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