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Dimensionality influence of the passive scalar transport observed through experiments on the turbulence shearless mixing
No full textDimorphomicropora Ducasse & Vigneaux 1960
No full textGenus <i>Dimorphomicropora</i> Ducasse & Vigneaux, 1960 <p> TYPE SPECIES. — <i>Dimorphomicropora voigti</i> Ducasse & Vigneaux, 1960, by original designation.</p> <p> OTHER SPECIES. — <i>Dimorphomicropora crestulata</i> (Ducasse, 1958) (described below); <i>Dimorphomicropora rugica</i> (Marsson, 1887), Lower Maastrichtian, Rügen, Germany, and Upper Maastrichtian of Maastricht, Netherlands (Voigt 1975); <i>Dimorphomicropora transversa</i> (d’Orbigny, 1851), Lower Maastrichtian, Néhou, Contentin, France.</p> <p>REVISED DIAGNOSIS. — Microporid with erect colonies, narrow cylindrical branches lacking complete bifurcations, colonies probably articulated; autozooids lacking a gymnocyst, cryptocyst depressed centrally, pierced by 2 large opesiules; orifice subcircular to dummy shaped with a raised rim; no spines or tubercles; ovicells clustered resulting in branch dilation, ooecia helmet-shaped, continuous with cryptocysts of the distal zooids, orifices of fertile zooids enlarged; mandibulate polymorphs in some species, infrequent, larger than autozooids but with similar frontal wall and opesiules, orifice semielliptical, longer than wide.</p> <p>REMARKS</p> <p> The name <i>Dimorphomicropora</i> refers to the zooidal dimorphism evident in the type species of this genus. In addition to normal autozooids (“Cellules A” of Ducasse & Vigneaux 1960), there are occasional polymorphic zooids (“Cellules B” of Ducasse & Vigneaux 1960) with an enlarged orifice and presumably an enlarged operculum or mandible. These mandibulate polymorphs resemble the B-zooids found in <i>Steginoporella</i>. Like the B-zooids of <i>Steginoporella</i>, it seems possible that they had the capacity to feed.</p> <p> The existence of mandibulate polymorphs in <i>Dimorphomicropora</i> has led to the suggestion that this Cretaceous genus belongs to the Cenozoic family Steginoporellidae. However, Ostrovsky (2013: 329) believed <i>Dimorphomicropora</i> to be probably an unrelated homeomorph of <i>Steginoporella</i> and excluded it from his superorder Thalamoporellina to which <i>Steginoporella</i> is assigned. Ducasse & Vigneaux (1960) hypothesised that <i>D. voigti</i> might be an evolutionary link between <i>Micropora rugica</i> [since assigned to <i>Dimorphomicropora</i> by Voigt 1975] and Steginoporellidae. At the time of their publication, this was consistent with the stratigraphy because the type locality (Meschers, Charente-Maritime) of <i>D. voigti</i> was considered to be of middle Maastrichtian age, whereas <i>D. rugica</i> was known only from the early Maastrichtian. However, the re-dating of Meschers as Campanian makes the order of occurrence of these two species incongruent with this evolutionary hypothesis.</p> <p> Voigt (1975) misunderstood the nature of the dimorphism described in <i>Dimorphomicropora</i> by Ducasse & Vigneaux (1960), interpreting it to refer to the contrast between nonbrooding and brooding ovicellate autozooids. However, the original description of <i>Dimorphomicropora</i> makes no mention of brooding zooids or ovicells. The type specimen of <i>D. crustulenta</i> (Ducasse, 1958) is ovicellate (Fig. 4A), as is a poorly preserved specimen of <i>D. voigti</i> (Fig. 3H).</p>Published as part of <i>Taylor, Paul D. & Villier, Loïc, 2022, Cretaceous microporid cheilostome bryozoans from the Campanian historical stratotype of southwest France, pp. 515-525 in Geodiversitas 44 (18)</i> on page 521, DOI: 10.5252/geodiversitas2022v44a18, <a href="http://zenodo.org/record/6564669">http://zenodo.org/record/6564669</a>
I. Ducasse : Les Chants de Maldoror, éd. D. Oster
No full textFizaine Jean-Claude. I. Ducasse : Les Chants de Maldoror, éd. D. Oster. In: Romantisme, 1978, n°19. L'ombre de l'histoire. p. 120
Dimensionality influence on passive scalar transport
No full textWe numerically investigate the advection of a passive scalar through an interface placed inside a decaying shearless turbulent mixing layer. We consider the system in both two and three dimensions. The dimensionality produces a different time scaling of the diffusion, which is faster in the two-dimensional case. Two intermittent fronts are generated at the margins of the mixing layer. During the decay these fronts present a sort of propagation in both the direction of the scalar flow and the opposite direction. In two dimensions, the propagation of the fronts exhibits a significant asymmetry with respect to the initial position of the interface and is deeper for the front merged in the high energy side of the mixing. In three dimensions, the two fronts remain nearly symmetrically placed. Results concerning the scalar spectra exponents are also presente
Dimorphomicropora voigti Ducasse & Vigneaux 1960
No full textDimorphomicropora voigti Ducasse & Vigneaux, 1960 (Fig. 3) MATERIAL. — Lectotype. UB C.B.993 (Ducasse & Vigneaux 1960: fig. 1), probably Aubeterre Fm, Meschers, Charente-Maritime (France). — Paralectotype. UB C.B.994 (Ducasse & Vigneaux 1960: fig. 2), probably Aubeterre Fm, Meschers, Charente-Maritime (France). — Other material: NHMUK PI BZ 8767, 8768, 8769, Aubeterre Fm, Pointe de Suzac, Meschers, Charente-Maritime (France). OCCURRENCE. — Upper Campanian, Aubeterre Formation. DESCRIPTION Colony erect, consisting of cylindrical branches, complete bifurcations not observed, probably articulated during life. Branches 8- to 10-serial, up to 2 mm in preserved length, normally 0.61-0.66 mm wide increasing to about 1 mm in diameter where fertile zooids are present. Colony base unknown. Autozooids longer than wide, ZL 444-489 μm (N colonies 1; N zooids 5; mean 458 μm; SD 20 μm), ZW 178-200 μm (N colonies 1; N zooids 5; mean 182 μm; SD 20 μm), elongate hexagonal. Frontal wall cryptocystal, margins raised, centre depressed, smooth textured; cryptocystal pores lacking; single pair of opesiules located proximolaterally of orifice within depressed central part of cryptocyst, longitudinally elliptical. Orifice dummy shaped, longer than wide, OL 118-141 μm (N colonies 2; N zooids 8; mean 132 μm; SD 8 μm), OW 70-94 μm (N colonies 2; N zooids 8; mean 87μm; SD 10 μm), divided into a broad, rounded quadrate distal part and a narrow, long, tonguelike proximal prolongation, each with a salient rim. Fertile autozooids clustered, ooecia helmet shaped, slightly wider than long, about 200-220 µm long by 240-300 µm wide, calcification smooth, continuous with the cryptocyst of the distal zooid, orifice of ovicellate zooids round, larger than those of non-ovicellate zooids, about 200 µm in diameter. Mandibulate polymorphs sporadically distributed, larger than autozooids, 550-590 µm long by 260-290 µm wide, frontal wall and opesiules similar to those of the autozooids, orifice semielliptical with a slight proximal lip, longer than wide, about 290 µm long by 210-240 µm wide. REMARKS The presence of mandibulate polymorphs and the dummy shaped orifices serve to distinguish D. voigti from D. crestulata (described below) and also from the Maastrichtian species D. rugica.Published as part of Taylor, Paul D. & Villier, Loïc, 2022, Cretaceous microporid cheilostome bryozoans from the Campanian historical stratotype of southwest France, pp. 515-525 in Geodiversitas 44 (18) on pages 521-522, DOI: 10.5252/geodiversitas2022v44a18, http://zenodo.org/record/656466
Isidore Ducasse précurseur d\u27Odilon Redon. L\u27hypotypose en noir et blanc.
No full textLes chants de Maldoror sont un texte visuel. Les images présenté es, souvent violentes, frappent le lecteur pris dans son conformisme. A l\u27heure oùles rayons X et la psychanalyse avancent sur la scène médicale, à l\u27heure oùles théories de l\u27évolution de Darwin transforment les idées reçues, l\u27on perçoit chez Redon comme chez Ducasse avant lui, une volonté d\u27exposer ce qui était au préalable enfoui, invisible. Larves et microbes se côtoient dans les tableaux de Redon, comme Ducasse se plaît à décrire en détails les divers organes que Maldoror, lénigmatique protagoniste des Chants, sort avec soin du vagin de la fillette fraîchement violée et dépecée (Ducasse 1953, 230). L\u27intérieur est exposé à l\u27extérieur. L\u27hypoptypose que Michel Fointanier (1968) définit comme suit constituerait ainsi la figure de style dominante des Chants: \u3c\u3e (Fontanier 1968, 390). Outre cette dimension visuelle chez Lautréamont, la violence est rapide, instantanée Elle découle d\u27une pulsion agressive, pour reprendre les mots de Gaston Bachelard (1939). L\u27utilisation du présent et du passé simple dans la majeure partie de la narration renforce l\u27idée d\u27instantanéité: l\u27attaque sitôt perpétrée est sitôt disparue
Physician-made fenestrated endografts versus chimney grafts
No full text• Both techniques are off label and are indicated for patients unfit for open surgery and where other therapeutic options are not available. The techniques require excellent experience in standard EVAR and renal/visceral vessel catheterisation and grafting. • Chimney graft technique can be used for more proximal thoracoabdominal aneurysms. This technique seems to be easier and faster to perform. it is safer because of the possibility of retrieving all devices in case of access failure to target vessels. With this technique, there is less exposure to X-rays. • A physician-made fenestrated graft is more suitable anatomically and has the possible advantages of long-term durability of the technique in terms of graft patency and visceral perfusion. • Combination of the two techniques can reduce the complexity of multiple fenestrations as well as the risk of the gutters' endoleaks from multiple chimney grafts
The value of the below-the-ankle level loop technique of foot artery reconstruction
No full text• The pedal-plantar loop technique has been successfully applied in specialised vascular centers, showing its feasibility and safety. • However, this technique is not always feasible (15-20% of cases) due to anatomic variation of foot circulation of very challenging lesions in very tortuous arteries. • The technical key point is to advance step-by-step into thoses very narrow and tortuous arteries. • Progression with short injection througth the support catheter is mandatory. • The use of dedicated material is crucial
Combination of Chimneys and Fenestrated Endografts in the Treatment of Complex Aortic Aneurysms
No full textPurpose: To present early results of fenestrated endovascular aneurysm repair (FEVAR) combined with chimney grafts in a high-volume center. Methods: From July 2011 to July 2016, 45 patients (mean age 73.0±8.8 years; 39 men) with complex aneurysms who were poor candidates for open repair and anatomically ineligible for standard or custom-made FEVAR were treated with chimney FEVAR (chFEVAR). Eight (18%) cases were treated in emergency. In all, 130 target vessels (2.9/patient) were addressed using 21 scallops, 42 open/18 covered chimneys, and 27 custom-made/22 homemade fenestrations. Results: Successful aneurysm exclusion, successful reconstruction, and technical success rates were 97.8% (44/45), 98.2% (107/109 vessels excluding the scallops), and 93.3% (42/45). Six (13.3%) patients died within 30 days (5 in hospital). Estimated overall survival, freedom from aneurysm-related death, and freedom from aneurysm-related reintervention were 85.9%, 88.5%, and 59.2%, respectively, at 12 months. The target vessel patency rate was 96.0%. At latest follow-up, 1 type Ia and 3 type II endoleaks were present. Sac shrinkage occurred in 18 (54%) patients. Conclusion: Combined chFEVAR showed good technical feasibility and could be an effective approach in emergent settings and highly selective cases when FEVAR is not feasible. Thirty-day mortality, target vessel patency, and type Ia endoleak rates were acceptable
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
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