1,720,993 research outputs found

    Stima acustica della crescita di un capodoglio (Physeter macrocephalus Linneaus, 1758) ricatturato in Mar Ligure

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    stima delle dimensioni di un capodoglio ricatturato tramite fotoidentificazione in Mar Ligure a distanza di un anno e stima della crescita attraverso l'analisi della struttura dei segnali emessi (misura dell'Inter Pulse Interval

    Freely faceted classification for the BioAcoustic Reference Database.

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    The Integrative Level Classification (ILC) research project is experimenting with a knowledge organization system based on phenomena rather than disciplines. Each phenomenon has a constant notation, which can be combined with that of any other phenomenon in a freely faceted structure. Citation order can express differential focality of the facets. Very specific subjects can have long classmarks, although their complexity is reduced by various devices. Freely faceted classification is being tested by indexing a corpus of about 3300 papers in the interdisciplinary domain of bioacoustics. The subjects of these papers often include phenomena from a wide variety of integrative levels (mechanical waves, animals, behaviour, vessels, fishing, law...) as well as information about the methods of study, as predicted in the León Manifesto. The archive is recorded in a MySQL database, and can be fed and searched through PHP Web interfaces

    Rilievi acustici sul capodoglio (Physeter macrocephalus) nel Mar Mediterraneo Centrale

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    Sintesi dei rilievi acustici effettuati per studiare il capodogli nel Mediterraneo Centrale

    Software tools for real-time IPI measurements on sperm whale sounds.

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    description of a software tool to measure the Inter-Pulse-Interval in sperm whale clicks to estimate the size of the emitting animal. A real-time cepstrum based technique is described and demonstrated

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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

    Diel occurrence of characteristic acoustic emission in feeding striped dolphins (Stenella coeruleoalba).

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    The paper describes and acoustic behavior of striped dolphin that is made mainly at night in relation with feeding activities. It has been discovered by analyzing recordings made 24/34h with towed arrays of hydrophones

    Interactive Digital Sound Library on cetaceans of the Mediterranean Sea.

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    description of an interactive digital sound library to manage sound and ultrasound recordings of marine mammal
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