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See detailMorphological echocardiographic measurements: reference values as a function of body size in equids
Al Haidar, A; Sandersen, Charlotte ULg; Van Erck, Emmanuelle et al

Poster (2008)

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See detailMorphological erosions and openings: fast algorithms based on anchors
Van Droogenbroeck, Marc ULg; Buckley, Michael

in Journal of Mathematical Imaging and Vision (2005), 22(2-3), 121-142

Several efficient algorithms for computing erosions and openings have been proposed recently. They improve on VAN HERK's algorithm in terms of number of comparisons for large structuring elements. In this ... [more ▼]

Several efficient algorithms for computing erosions and openings have been proposed recently. They improve on VAN HERK's algorithm in terms of number of comparisons for large structuring elements. In this paper we introduce a theoretical framework of anchors that aims at a better understanding of the process involved in the computation of erosions and openings. It is shown that the knowledge of opening anchors of a signal f is sufficient to perform both the erosion and the opening of f. Then we propose an algorithm for one-dimensional erosions and openings which exploits opening anchors. This algorithm improves on the fastest algorithms available in literature by approximately 30% in terms of computation speed, for a range of structuring element sizes and image contents [less ▲]

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See detailMorphological image sketch coding
Simon, Benoît; Macq, Benoît; Van Droogenbroeck, Marc ULg

in Workshop on Circuits, Systems and Signal Processing, Proceedings (1993, March)

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See detailMorphological models of complex ordered materials based on inhomogeneously clipped Gaussian fields
Gommes, Cédric ULg; Pirard, Jean-Paul ULg

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2009), 80

Clipping a Gaussian random field at a level that is position-dependent yields statistically non-homogeneous morphologies, relevant to many ordered nanostructured materials. The 1-point and 2-point ... [more ▼]

Clipping a Gaussian random field at a level that is position-dependent yields statistically non-homogeneous morphologies, relevant to many ordered nanostructured materials. The 1-point and 2-point probability functions of the morphology are derived, as well as a general relation between the specific surface area and the gradient of the clipping function. The general results are particularized for the comprehensive analysis of small-angle x-ray scattering and nitrogen adsorption of SBA-15 ordered mesoporous silica. [less ▲]

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See detailA morphological novelty for feeding and sound production in the yellowtail clownfish
Olivier, Damien ULg; Frederich, Bruno ULg; Herrel, Anthony et al

in Journal of Experimental Zoology. Part A, Comparative Experimental Biology (2015), 323A

The yellowtail clownfish Amphiprion clarkii is able to close its mouth very quickly by means of the cerato-mandibular (c-md) ligament, a synapomorphic trait of Pomacentridae joining the hyoid bar to the ... [more ▼]

The yellowtail clownfish Amphiprion clarkii is able to close its mouth very quickly by means of the cerato-mandibular (c-md) ligament, a synapomorphic trait of Pomacentridae joining the hyoid bar to the medial part of the lower jaw. This fast closure induces tooth collision, thus producing sounds that the clownfish uses during agonistic behaviors. To investigate whether this rapid jaw movement is also used during feeding, we analyzed the kinematics of sound production and feeding. Sound production, feeding on live planktonic prey, and feeding on food attached to tweezers were filmed with a high-speed camera. Three kinds of kinematic patterns were detected and were associated with the two different types of food presented: one performed to catch planktonic prey (PP), and two (called B-1 and B-2) to bite attached food items. The kinematic pattern of B-2 is similar to that observed during sound production (SP) and the transection of the c-md ligament highlights that sound production and biting-2 motions are dependent on this morphological trait. Our data show that the c-md ligament in addition to its role in sound production allows duplication of the mouth closing mechanism during feeding. This highlights the key role played by the c-md ligament in sound production and feeding on attached prey. [less ▲]

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See detailMorphological particularities of the head in four Carapidae (Ophidiiformes)
Parmentier, Eric ULg; Chardon, Michel ULg; Poulicek, Mathieu ULg et al

in Séret, Bernard; Sire, Jean-Yves (Eds.) 5th Indo-Pacific Fish Conference, Noumea - New Caledonia, 3-8 November 1997: Proceedings (1999)

A study of the skull and the musculature of the oral and pharyngeal region of four adult Carapidae species (Encheliophis boraborensis, Encheliophis homei, Encheliophis gracilis and Carapus acus) has ... [more ▼]

A study of the skull and the musculature of the oral and pharyngeal region of four adult Carapidae species (Encheliophis boraborensis, Encheliophis homei, Encheliophis gracilis and Carapus acus) has undertaken to compare it with the diet related characters. The cephalic organization of E. boraborensis and E. gracilis seems related to diet (mainly fishes and shrimps for the first one and holothurian tissues for the other) : these fishes are respectively commensal and parasitic. Although the feeding characters of E. homei and C. acus are closely similar to those of E. boraborensis, there are sparse observations of holothurian tissues in their stomach contents. It is suggested that these fishes are commensal when they are adults and have parasitic tendency when they are juvenile. [less ▲]

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See detailMorphological priming in developing readers: Effects of semantic and formal transparency
Quemart, Pauline ULg

Scientific conference (2010, April)

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See detailMorphological processing in developing readers: a visual word recognition study in French
Quemart, Pauline ULg; Casalis, Séverine

Conference (2008, August)

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See detailMorphological properties of isolated galaxies vs. isolation criteria
Vavilova, I. B.; Melnyk, Olga ULg; Elyiv, Andrii ULg

in Astronomische Nachrichten (2009), 330

We studied the morphological properties of isolated galaxies samples in dependence on the isolation parameter and properties of primary catalogs. With this aim we identified the samples of single and ... [more ▼]

We studied the morphological properties of isolated galaxies samples in dependence on the isolation parameter and properties of primary catalogs. With this aim we identified the samples of single and isolated galaxies from SDSS DR5 (Single and QIsol) with the 3D Voronoi tessellation method (Elyiv et al. 2009). We found that in comparison with other samples of isolated galaxies, the QIsol sample contains an excess of late-type galaxies, especially with a low luminosity and BCG/Im/Irr morphology. We also showed that the fractions of early type galaxies in QIsol SDSS DR5 sample and samples 2MIG (Karachentseva et al. 2010) and CIG (Karachentseva et al. 1973; Hernandez-Toledo et al. 2008) are in a good agreement (16-19 %), but Allam's (Allam et al. 2005) and Prada's (Prada et al. 2003) SDSS DR1 samples show a higher excess of the early type galaxies that can be explained by the selection criteria and morphology definition method. We found a weak relation between isolation parameter and color index for the Single sample that may indicate that even in the low dense environment the morphology density relation is observed. We conclude that morphological properties of the resulting sample of isolated galaxies are highly dependent on the primary catalogue from which the galaxies were selected. Moreover, the selection criterion is also important but plays a secondary role in the resulting morphological content, color indices distribution and other parameters of the isolated galaxy samples. Only four galaxies are common in the 2MIG, QIsol, and CIG samples, namely UGC5184, UGC6121, UGC8495, and UGC9598, that allows to consider them as really most isolated galaxies. [less ▲]

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See detailMorphological quantification of bone scaffolds with µCT
Kerckhofs, Greet ULg; Schrooten, Jan; Van Cleynenbreugel, T. et al

Conference (2006)

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See detailMorphological recognition of artificial F1 hybrids between three common European cyprinid species: Rutilus rutilus, Blicca bjoerkna and Abramis brama.
Matondo, B. N.; Ovidio, Michaël ULg; Poncin, Pascal ULg et al

in Dong Wu Xue Bao = Acta Zoologica Sinica (2008), 54(1),

The F1 hybrids of roach Rutilus rutilus, silver bream Blicca bjoerkna, and common bream Abramis brama from experimental reciprocal cross-breedings were identified at 18 months of age in relation to the ... [more ▼]

The F1 hybrids of roach Rutilus rutilus, silver bream Blicca bjoerkna, and common bream Abramis brama from experimental reciprocal cross-breedings were identified at 18 months of age in relation to the parental species. The morphological analysis, including quantitative (plastic and meristic) and nonmetric features differing in the roach, the silver bream and the common bream, revealed that roach * common bream and roach * silver bream hybrids were easier to distinguish from their parents than silver bream * common bream hybrids. These roach hybrids had many morphological similarities such as the upper iris coloured in red as in the roach, and they were morphologically intermediate to the two parents. This contrasted with the silver bream * common bream hybrids, in which intermediate characteristics were also observed, but with some parental variants. Roach * silver bream hybrids were distinguishable from roach * common bream hybrids by its large eye, its lower scale numbers along the lateral line and its two rows of pharyngeal teeth. Silver bream * common bream hybrids, compared to the two other types of hybrids studied, had higher anal fin soft ray numbers and a clear eye iris with a median black line. In all interspecific crosses of these three cyprinid species fish, the reciprocal hybrids were generally indistinguishable. [less ▲]

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See detailMorphological segmentation-based coding of image sequences
Salembier, P.; Casas, J.R.; Gasull, A. et al

Scientific conference (1993, December)

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See detailMorphological study of magnesium hydroxide nanoparticles precipitated in dilute aqueous solution
Henrist, Catherine ULg; Mathieu, J. P.; Vogels, C. et al

in Journal of Crystal Growth (2003), 249(1-2), 321-330

Among other applications, magnesium hydroxide is commonly used as a flame-retardant filler in composite materials, as well as a precursor for magnesium oxide refractory ceramic. The microstructure of the ... [more ▼]

Among other applications, magnesium hydroxide is commonly used as a flame-retardant filler in composite materials, as well as a precursor for magnesium oxide refractory ceramic. The microstructure of the powder is of prime importance in both technical applications. The influence of synthesis parameters on the morphological characteristics of magnesium hydroxide nanoparticles precipitated in dilute aqueous medium was studied. Several parameters were envisaged such as chemical nature of the base precipitant, type of counter-ion, temperature and hydrothermal treatment. Special attention was given to the obtaining of platelet-shaped, nanometric and de-agglomerated powders. The powders were characterized in terms of particle size distribution, crystal habits, morphology and ability to be redispersed in water. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption and laser diffusion analyses were used for this purpose. (C) 2002 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailMorphological variability of some Devonian miospores
Breuer, P.; Filatoff, J.; Steemans, Philippe ULg

in Palaeozoic palynology in space and time. CIMP general meting (2006)

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See detailThe morphological variation of fossil remains and the problematic notion of palaeontological species: the case of the Atlas bear resolved by ancient DNA analyses
Pagès, Marie ULg; Calvignac, Sébastien; Michaux, Jacques et al

Poster (2006, June)

Because of the morphological variation of the fossil remains, fossil species is a very difficult notion to define in palaeontology. This definition is effectively confronted to numerous problems such as ... [more ▼]

Because of the morphological variation of the fossil remains, fossil species is a very difficult notion to define in palaeontology. This definition is effectively confronted to numerous problems such as body size polymorphism inside a natural population, co-existence of lineages with different morphotypes in a same species. Interestingly, paleogenetics can clarify such ambiguous situations. Size polymorphism and sexual dimorphism were particularly highly pronounced in Ursid populations. Taking as an illustration the extinct populations of brown bear in North Africa, we succeed in addressing the mitochondrial genetic diversity of these Atlas bears and the sexual dimorphism of these samples using molecular typing We are confident that these results will give useful information to palaeontologists in order to revisit the Atlas bears taxonomy and that this approach should be extended to other complex cases of palaeontological species. [less ▲]

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See detailMorphological, chromosomal, and genic differences between sympatric Rattus rattus and Rattus satarae in South India
Pagès, Marie ULg; Corbet, Gordon; Orth, Annie et al

in Journal of Mammalogy (2011), 92(3), 659670

Two morphological forms of black rats (Rattus cf. rattus) were found living in sympatry in high-altitude dense forests of the Nilgiri Mountains, South India. The 1st one, often brown- or gray-bellied ... [more ▼]

Two morphological forms of black rats (Rattus cf. rattus) were found living in sympatry in high-altitude dense forests of the Nilgiri Mountains, South India. The 1st one, often brown- or gray-bellied, also is found commensal in lowland settlements and represents Rattus rattus cf. rufescens (Gray 1837), with a diploid number (2N) of 38 chromosomes. The 2nd form, which has most often a pure white belly, has 2N 5 42 chromosomes and is referable to Rattus r. satarae Hinton, 1918, based on morphological comparison with the holotype. A multidisciplinary study indicates that these 2 forms are characterized by clear-cut differences in biochemistry (electrophoresis of homologous isozymes), molecular sequences (mitochondrial and nuclear DNA), and chromosomes (detailed banding analysis). All these data, coupled to diagnostic morphological characteristics, support the hypothesis that Rattus satarae and Rattus rattus are separate, sympatric species, with no gene flow between them. Their similar external morphology is interpreted as the result of convergence through occupying the same ecological niche. [less ▲]

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