1,723,397 research outputs found
<i>Nemesignis</i>, a Replacement Name for <i>Nemesis</i> Furfaro & Mariottini, 2021 (Mollusca, Gastropoda, Myrrhinidae), Preoccupied by <i>Nemesis</i> Risso, 1826 (Crustacea, Copepoda)
No full textThe genus Nemesis Furfaro & Mariottini, 2021, was recently introduced for an independent lineage of aeolid nudibranchs, and Dondice banyulensis Portmann & Sandmeier, 1960, established as its type species. Anyway, the presence of a senior homonym, Nemesis Risso, 1826, was evidently missed. In fact, in 1826, Risso established this genus for a group of Copepoda (Arthropoda, Crustacea) and according to the Principle of Priority (ICZN) only the senior homonym may be used as a valid name. Therefore, a new replacement name is here proposed. Furthermore, the genus name Nanuca Er. Marcus, 1957, has priority over Dondice Er. Marcus, 1958 and consequently, the species in this clade should be classified under Nanuca, mostly as new combinations
Ecology and distribution of the Mediterranean Dondice trainitoi Furfaro and Mariottini, 2020 (Mollusca: Nudibranchia)
No full textDuring scientific technical dives in a marine animal forest (MAF) environment, the nudibranch Dondice trainitoi Furfaro & Mariottini 2020 was recorded on a rocky bottom at 50 m depth in the Salento Peninsula, Southern Italy, Eastern Mediterranean Sea. Further in situ explorations and broad bibliographic research within both the scientific and grey literature revealed that D. trainitoi is widely distributed across the Mediterranean Sea, despite what was previously known. Herein are the first records for the Adriatic Sea and the Apulia region of Italy, together with the deepest record of this species. An analysis of collected samples and both in situ and laboratory photographs of the hydrozoan colonies associated with D. trainitoi revealed its ecology and trophic behaviour; we conclude that the hydrozoan Obelia bidentata Clark, 1875 is its preferred prey, but that it also feeds on the athecate hydroid Eudendrium glomeratum Picard, 1952. These findings shed some light on the little-known ecology and distribution, on both a geographical and a bathymetric scale, of this species, which are fundamental to increasing knowledge on Mediterranean biodiversity and its ecosystem functions
Other institutionalization and everyday life : analytical possibilities from a pragmatic conception
Get PDFFil: Furfaro, Cristian. Universidad Nacional de La Plata; Argentin
As cabeças indígenas de Franco Furfaro
Get PDFFour sculptural heads by the artist Franco Furfaro are on display in the upper rotunda of the Museo de La Plata. These pieces share the space with ten other similar works sculpted by Ernesto Soto Avendaño, which at first glance would seem to all belong to the same author. However, a closer look allows distinquishing between them and even finding interesting differences, when we delve deeper into the knowledge of this heritage. This work, despite the scarcity of data and sources of information, focuses on the history of how these sculptures were acquired, the institutional goals of the museum when purchasing them and the possible motivations that led the artist to make them.En la rotonda superior del Museo de La Plata se exponen cuatro cabezas escultóricas del artista Franco Furfaro. Las piezas comparten el espacio con otras diez obras similares, las esculturas de Ernesto Soto Avendaño, que en una vista general parecen pertenecer todas a un mismo autor. Sin embargo, una mirada más aguda permite distinguirlas y aún encontrar interesantes diferencias cuando se profundiza en el conocimiento sobre este patrimonio. Este trabajo, a pesar de contar con escasos datos y fuentes de información, se detiene en la historia de la adquisición de la esculturas, los objetivos institucionales del museo al comprarlas y las posibles motivaciones que llevaron al artista a realizarlas.Na rotunda superior do Museu de La Plata estão expostas quatro cabeças escultóricas do artista Franco Furfaro. As peças compartilham o espaço com outras dez obras semelhantes, as esculturas de Ernesto Soto Avendaño, que numa visão geral parecem pertencer todas ao mesmo autor. No entanto, um olhar mais atento permite distingui-las e até encontrar diferenças interessantes quando se aprofunda no conhecimento deste patrimônio. Este trabalho, apesar de contar com poucos dados e fontes de informação, centra-se na história da aquisição das esculturas, nos objetivos institucionais do museu ao adquiri-las e nas possíveis motivações que levaram o artista a realizá-las
The indigenous heads by Franco Furfaro
Get PDFEn la rotonda superior del Museo de La Plata se exponen cuatro cabezas escultóricas del artista Franco Furfaro. Las piezas comparten el espacio con otras diez obras similares, las esculturas de Ernesto Soto Avendaño, que en una vista general parecen pertenecer todas a un mismo autor. Sin embargo, una mirada más aguda permite distinguirlas y aún encontrar interesantes diferencias cuando se profundiza en el conocimiento sobre este patrimonio. Este trabajo, a pesar de contar con escasos datos y fuentes de información, se detiene en la historia de la adquisición de la esculturas, los objetivos institucionales del museo al comprarlas y las posibles motivaciones que llevaron al artista a realizarlas.Four sculptural heads by the artist Franco Furfaro are on display in the upper rotunda of the Museo de La Plata. These pieces share the space with ten other similar works sculpted by Ernesto Soto Avendaño, which at first glance would seem to all belong to the same author. However, a closer look allows distinquishing between them and even finding interesting differences, when we delve deeper into the knowledge of this heritage. This work, despite the scarcity of data and sources of information, focuses on the history of how these sculptures were acquired, the institutional goals of the museum when purchasing them and the possible motivations that led the artist to make them.Facultad de Ciencias Naturales y Muse
Verso la codificazione del diritto marittimo mediterraneo: nel cantiere dell’Alto Adriatico di fine Settecento
No full textAt the end of the 18th century, different drafts of complete and independent maritime codes were elaborated within the Italian Mediterranean area: in the Kingdom of Naples (1781), the Habsburg free port of Trieste (1785), the Republic of Venice (1786) and the Kingdom of Sardinia (1791), respectively. This paper reconstructs especially the features of the Habsburg project, paying particular attention both to the insurance regulations and the original scientific contribution of their author, the jurist G. Gabbiati, unpublished up to now
Analysis and Performance Evaluation of ZEM/ZEV Guidance and Its Sliding Robustification for Autonomous Rendezvous in Relative Motion
No full textDevising closed-loop guidance algorithms for autonomous relative motion is an important problem within the field of orbital dynamics. However, very few closed-loop algorithms have been devised that can autonomously generate feedback trajectories to execute rendezvous in relative motion (e.g. Lopez and McInnes, 1995, JGCD). In this paper, we explore the application of the generalized Zero-Effort-Miss/Zero-Effort-Velocity (ZEM/ZEV) feedback guidance (Guo et al., 2013, JGCD) and its robustified version known as Optimal Sliding Guidance (OSG, Wibben and Furfaro, 2016, ASR) to the problem of closed-loop spacecraft rendezvous guidance. The ZEM/ZEV feedback guidance has been studied extensively and can be found in the literature for intercept, rendezvous, terminal guidance and landing applications. Such analytical closed-loop guidance has been originally conceived by Battin who devised an energy optimal, feedback acceleration command for powered planetary descent. Ebrahimi et al. (2008, AA) introduced the ZEV concept, as a partner for the well-known ZEM and integrated it with a sliding surface for missile guidance with fixed-time propulsive maneuvers. Furfaro et al. (2011, Advances in Astronautical Sciences) extended the idea to the problem of lunar landing guidance and set the basis for the theoretical development of a robust closed-loop algorithm for precision landing. ZEM/ZEM feedback guidance is attractive because of its analytical simplicity as well as potential for quasi-optimal fuel performance. When robustified by a time-dependent sliding term, the resulting OSG can be proven to be Globally Finite-Time Stable (GFTS) in spite of perturbation with known upper bound. Here, we study the guided relative motion of two spacecraft for which one of them is executing an autonomous rendezvous via the ZEM/ZEV feedback guidance and its robustifed OSG counterpart. When augmented via time-dependent sliding, the application of Lyapunov stability theory for non-autonomous systems provides the sufficient conditions for GFTS. Indeed, the OSG can be demonstrated to be GFTS for any linear and non-linear relative motion model (e.g. rendezvous in circular orbit or in highly eccentric orbit). Starting from the classical Clohessy-Wiltshire (CW) model, we systematically analyze the ability of the ZEM/ZEV feedback guidance to execute quasi-optimal closed-loop maneuvers and its ability to correct disturbances for precision guidance. Comparison with the OSG counterpart will provide an assessment of the need for robustification as function of different rendezvous conditions (e.g. rendezvous in highly elliptical orbit) and different thrusting constraints (e.g. limited thrust)
Derecho a la resistencia en la Filosofía práctica contemporánea
No full textResumen temporalmente no disponible. La presente obra no cuenta con resumen provisto por el autor.Fil: Furfaro, María Alejandra. Universidad de Buenos Aires. Facultad de Filosofía y Letras
Dondice trainitoi Furfaro & Mariottini 2020, sp. nov.
No full text<i>Dondice trainitoi</i> sp. nov. (Figures 1 A - F) <p>Zoobank: urn:lsid:zoobank.org:act: 5072B304-A2F2-4AB0-A0EF-6DF26EC0242B</p> <p> <b>Holotype:</b> MNHN IM-2000-33722, 10 mm in length, Riva di Traiano, Civitavecchia, Latium, Italy, Mediterranean Sea, August 03 2017, 28 m depth, 42°03’15’’N, 11°47’45’’E.</p> <p> <b>Paratypes:</b> paratype MNHN IM-2000-33723, 5 mm in length, Riva di Traiano, Civitavecchia, Latium, Italy, Mediterranean Sea, June 11 2016, 30 m depth; paratype MNHN IM-2000-33724, 5 mm long, Riva di Traiano, Civitavecchia, Latium, Italy, Mediterranean, June 04 2016, 32 m depth; paratype RM3 _1101, 8 mm in length; paratype RM3 _1102, 11 mm in length, Riva di Traiano, Civitavecchia, Latium, Italy, Mediterranean Sea, August 03 2017, 30 m depth; paratype RM3 _621, 16 mm in length, Riva di Traiano, Civitavecchia, Latium, Italy, Mediterranean Sea, August 25 2016, 30 m depth. All type material sampled at the “Asia” wreck on hydroids.</p> <p> <b>Etymology:</b> The species name is after Egidio Trainito, expert in nudibranch biology and Mediterranean marine biodiversity, underwater photographer and good friend of the authors.</p> <p> <b>Holotype morphological description:</b> The body is slender, with a narrow foot. The anterior part of the foot is bilabiate and extended into well-defined propodial tentacles. The elongate body is translucent cream, with bright white spots along the border of the foot, oral foot corners and tail. A characteristic iridescent light blue band is present on the tail, along the dorsum and the head where it bifurcates into two lines ending at the half part of the oral tentacles. Two other lateral lines of the same iridescent color are present dorsally, starting from the lateral part of the head below the rhinophores, becoming narrower and lighter through the body and terminating in the tail joining the dorsal band. A typical black pigment covering the mandibles is clearly visible through the epithelium. The cerata are translucent cream with a digestive gland that is yellowish in the basal portion but becoming gradually orange in the sub terminal part. The upper part of the cerata has a brightly yellowish ring larger in the anterior part than in the back where it is tapered. At the base of the rhinophores, the head is diaphanous, allowing the dark eyes to be seen (Figs 1A, C-E).</p> <p>The rhinophores are lamellate with ten dish-shaped annulations and end with a cylindrical tip (Fig. 1D). The basal portion and the narrow posterior furrow of the rhinophores are smooth. In their upper portion, there is a brightly white/yellowish stripe that is wider in the anterior than in the posterior part. The oral tentacles are longer than the rhinophores, cylindrical and slender with a bright band in the same color of the apical portion of the rhinophores. The notum showed four clusters of cerata composed by two rows, with the exception of the last group that has only one row of small cerata. There is one precardiac cluster with 22 cerata, two median groups with 16 and 14 cerata respectively, and the posterior one with a single row of 5 cerata. The cerata are slender and cylindrical, light orange, and with a yellow ring which is expanded in the front part and jointed in the rear (Fig. 1). The head is slender. The anus is cleioproct, located within the first post-hepatic arch.</p> <p> <b>Internal anatomy:</b> Three specimens, including the paratype MNHN IM- 2000-33724 (Fig. 1D), were examined. The masticatory jaws are covered with a typical black epithelium (Fig. 1E). The underlying chitinous jaws are visible from the muscular lips (Fig. 3A). These structures are pale yellowish and characterized by 16 well-developed, triangular denticles per each side (Figs 3 B-D). The radular formula is 8-12 x (0.1.0) (Figs 4 A-D). The rachidian tooth has a median cusp, bearing one denticle for each side, and it has 4-5 triangular denticles on each side of the cusp (Figs 4E, F). The reproductive system (Fig. 5) is diaulic. The genital openings are on the right side of the body, between the first and the second group of cerata (Fig. 5B). The long tubular ampulla runs the length of the female gland mass and the hermaphroditic duct then bifurcates into the oviduct and the vas deferens (Figs 5 D-F). The male gland terminates into the globular and unarmed penis (Fig. 5F). The penial bulb is smooth and muscular externally. The vagina is connected to an ovoidal receptaculum seminis and to the convoluted duct of the female gland mass. The female gland mass is white and complex, with a central rounded and a lateral tortuous mass (Fig. 5F).</p> <p> <b>Distribution:</b> Currently, this species is known from the Latium coast (Civitavecchia), type locality, and from Portofino Marine Protected Area (MPA) (Gulf of Genoa, Liguria) and Procida island (Naples, Campania) which are to date respectively the northernmost and the southernmost distribution sites. In particular, most of the findings took place on the ‘Asia’ and the near ‘Liburna’ wrecks, located near the harbour of Civitavecchia where this sea slug is really abundant (with a total of 15-20 individuals observed per each dive). Four years after the first finding in Civitavecchia, about seven individuals were observed from Portofino MPA, while only two specimens were photographed and collected from Procida Island. The specimens were found feeding on colonies of hydroids covering the artificial substrate, made of torn nets from fishing trawlers, wrapping both wrecks, or on colonies of hydroids in a Coralligenous rocky bottom, from June to early September. The geographic distributions of the species is reported in Figure 6.</p> <p> <b>Remarks:</b> The morphological variability shown by living animals (Fig. 1) consisted in the body length of the specimens (ranging from 8 to 15 mm), rhinophores with usually 10 or 12 (range 6-17) dish-shaped annulations and the notum with 4 or 5 clusters of cerata. The precardiac cluster of cerata could have up to 24 cerata, the two median clusters up to 18 cerata each one and the posterior one with a single row of maximum 6 cerata. The new species shows 15% mean <i>p</i> -distance at the COI with <i>D. occidentalis</i> and 18% with the Mediterranean <i>D. banyulensis</i>. It also differs morphologically from the three formerly known congeners (Table 3). <i>Dondice trainitoi</i> <b>sp. nov.</b> can be distinguished from <i>D. banyulensis</i> by the presence of the black pigment covering the jaws and forming two black patches clearly visible at the cephalic portion. The only other species which shares this very typical character is the <i>D. occidentalis</i> ‘ <i>sensu</i> Marcus Er. ’ (1958), who described a specimen from Cananèia (San Paolo, Brazil) which ‘ <i>…differs from the Jamaican specimens in some details. The black pigmented epithelium covering the jaws of our species is very striking, even in living slugs, but apparently is wanting in the Jamaican material as Engel does not mention it.</i> ’ (Marcus Er. 1958). <i>Dondice occidentalis</i> ‘ <i>sensu</i> Marcus’ however, has <i>‘…a median red stripe along the head and a stripe along each side</i> ’ (see the Brazilian specimen photographed by Lindner A. 2014, page 48) that clearly differs from the white ones characterizing <i>D. trainitoi</i> <b>sp. nov.</b> <i>Dondice galaxiana</i> is morphologically entirely different from <i>D. trainitoi</i> <b>sp. nov.</b>, in fact it has rhinophores with large dish-shaped annulations, the cerata are clustered on raised cushions and its body has rhomboid-shaped patches on the dorsum between the cerata. These features are completely lacking in the new species. <i>Dondice parguerensis</i> is morphologically similar to <i>D. occidentalis</i> but differing from it for its particular diet which consists of <i>Cassiopea</i> sp. and by the epithelium covering the jaws that is brown amber (Brandon & Cutress 1985) and not dark or black as in <i>D. occidentalis</i>.</p> <p> Specimens of the new species were observed and photographed <i>in situ</i> feeding on a reddish/orange hydroid belonging to the family Campanulariidae Johnston, 1836. The egg mass is a white lace coiled around the hydroid (Fig. 1F). Interestingly, as known for other facelinid species, <i>D. trainitoi</i> <b>sp. nov.</b>, when disturbed, autotomized its cerata to distract potential predators.</p>Published as part of <i>Furfaro, Giulia & Mariottini, Paolo, 2020, A new Dondice Marcus Er. 1958 (Gastropoda: Nudibranchia) from the Mediterranean Sea reveals interesting insights into the phylogenetic history of a group of Facelinidae taxa, pp. 1-22 in Zootaxa 4731 (1)</i> on pages 8-14, DOI: 10.11646/zootaxa.4731.1.1, <a href="http://zenodo.org/record/3635551">http://zenodo.org/record/3635551</a>
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