1,672 research outputs found
Acryptolaria laertesi Peña Cantero & Vervoort 2010, n. sp.
No full textAcryptolaria laertesi n. sp. (Figs 14; 30; 31K; Table 15) TYPE MATERIAL. — Loyalty Islands. MUSORSTOM 6, stn DW 425, 20°24.30’S, 166°24.80’E, 594 m, 17.II.1989, 1 stem c. 75 mm high, holotype (MNHN-Hy.2009-0165); 1 stem fragment c. 20 mm high, paratype (RMNH-Coel. no. 35137, slide 699). ETYMOLOGY. — The specific name “ laertesi ” is a dedication to Laertes Peña Sancho, son of the first author; it is a noun in genitive singular. ECOLOGY AND DISTRIBUTION. — Acryptolaria laertesi n. sp. was collected at a depth of 594 m in the Loyalty Islands area. DESCRIPTION Stem c. 75 mm high. Branching irregular and scarce (Fig. 31K); only seven, very short (up to 8 mm long) primary branches present. Branches roughly straight, with an almost unnoticeable zigzag (Fig. 14A). Hydrothecae alternately arranged in two planes forming an obtuse angle (Fig. 14A); approximately cylindrical, but with a clear decrease of diameter at basal adnate part (Fig. 14); minimum diameter at base. Distal part of hydrotheca practically straight. Hydrotheca strongly curved outwards, adnate for about half of its adcauline length (adnate/free ratio 1.1). Adcauline wall convex, straight at distal part; abcauline wall broadly concave, straight at distal part. Hydrothecal aperture circular, oblique and directed upwards, forming an angle of c. 30° with long axis of branch. Rim even, with numerous renovations (up to 12). Large nematocysts relatively very large and fusiform (Fig. 30). Coppinia not observed. REMARKS Acryptolaria laertesi n. sp. is easily recognizable by the colony structure, with just a few short primary branches and by shape and size of both hydrothecae and nematocysts. Acryptolaria laertesi n. sp. has extremely long and thin nematocysts (ratio 4.1). It has in fact the longest nematocysts in the genus Acryptolaria, together with A. tortugasensis, though in this species they are wider (29.3 × 9.9 µm). Acryptolaria laertesi n. sp. resembles A. encarnae n. sp. in the shape of the hydrothecae, but in the latter the hydrothecae are broadly cylindrical, slightly smaller, more strongly directed outwards and free for a smaller proportion. Moreover, in A. encarnae n. sp. the branches are straight and the large type of nematocysts is much smaller (19.9 × 7.5 µm). In the shape of the hydrothecae, A. laertesi n. sp. approaches A. corniformis, but in the latter the hydrothecae are much larger and less curved outwards. Moreover, it has much smaller nematocysts (12.3 × 4.3 µm in the holotype).Published as part of Peña Cantero, Álvaro L. & Vervoort, Willem, 2010, Species of Acryptolaria Norman, 1875 (Cnidaria, Hydrozoa, Lafoeidae) collected in the Western Pacific by various French expeditions, with the description of nineteen new species, pp. 267-332 in Zoosystema 32 (2) on pages 294-297, DOI: 10.5252/z2010n2a5, http://zenodo.org/record/452100
Beam Instrumentation
No full textThe Isotope mass Separator On-Line facility (ISOLDE) at CERN occupies a leading position in the field of radioactive ion beams research, as it can produce the largest range of isotopes worldwide —over 1000 isotopes of more than 70 elements. HIE-ISOLDE (High Energy and Intensity – ISOLDE) is an upgrade that aims to increase the facility’s energy and intensity reach, opening the way to new opportunities in multiple fields of physics: nuclear and atomic physics, astrophysics and fundamental interactions. This technical design report presents the HIE-ISOLDE energy upgrade as built. The report is divided in six parts. The first details the motivation behind the project, as well as previous experiences with post-accelerated beams at the facility. The second part presents the design of the new linear accelerator and its components, including cryomodules, superconducting cavities and solenoids, while the third focuses on beam dynamics. General services and systems are presented in the fourth part, while the fifth and sixth concern safety procedures and commissioning respectively.Fil: Bravin, E.. Cern - European Organization For Nuclear Research; SuizaFil: Cantero, Esteban Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnol.conicet - Patagonia Norte. Unidad de Adm.territorial; Argentin
Acryptolaria encarnae Peña Cantero & Vervoort 2010, n. sp.
No full text<i>Acryptolaria encarnae</i> n. sp. (Figs 8; 30; 31E; Table 9) <p> TYPE MATERIAL. — <b>Loyalty Islands.</b> MUSORSTOM 6, stn CP 464, 21°02.30’S, 167°31.60’E, 430 m, 21.II.1989, 1 stem <i>c.</i> 70 mm high, holotype (MNHN-Hy.2009- 0160); 1 stem 50 mm high, paratype (RMNH-Coel. no. 31506).</p> <p> OTHER MATERIAL EXAMINED. — <b>Norfolk Ridge.</b> BIOCAL 1, stn DW 66, 24°55.435’- 24°54.849’S, 168°21.678’- 168°21.995’E, 515- 505 m, 3.IX.1985, 1 unbranched fragment <i>c.</i> 13 mm long in slide (MNCN 2.03/393).</p> <p> ETYMOLOGY. — The species name <i>encarnae</i> is a dedication to Encarna Sancho Aguilar, wife of the first author. The name is a noun in female genitive.</p> <p> ECOLOGY AND DISTRIBUTION. — <i>Acryptolaria encarnae</i> n. sp. was collected at depths between 430 and 515 m in both the Loyalty Islands area and at the Norfolk Ridge.</p> <p>DESCRIPTION</p> <p>Stems up to 70 mm high, strongly polysiphonic and with dish-shaped hydrorhiza (Fig. 31E). Branching scarce and irregular; primary branches originating at basal part of stem, long, straight, upward directed and usually unbranched. 70 mm high stem of holotype with first 9 mm unbranched and tortuous, then with a primary branch of stronger development than main stem. The other stem in the sample (paratype) could actually be a detached primary branch of the main stem. The primary branch of the holotype gives rise to three secondary branches; of these, one forms two third-order branches, whereas the other two are unbranched, one is even 45 mm long. Main stem giving rise to two extra primary branches, the basal one forming two secondary branches. Branches straight (Fig. 8A, B).</p> <p>Hydrothecae alternately arranged in approximately one plane (Fig. 8A, B), cylindrical (Fig. 8), diameter decreasing only slightly at basal part. Hydrothecae gently curved outwards, adcauline wall convex throughout, abcauline wall concave. They are adnate for almost two-thirds of their adcauline length (adnate/free ratio 1.8). Hydrothecal aperture circular and directed outwards, almost parallel to long axis of branch (Fig. 8); rim even. Some hydrothecae with dish-shaped operculum.</p> <p>Large nematocysts relatively large and fusiform (Fig. 30).</p> <p>Coppinia not found.</p> <p>REMARKS</p> <p> <i>Acryptolaria encarnae</i> n. sp. is clearly recognizable by the colony structure, with long, straight and little branched primary branches, and by the shape of the hydrothecae which are almost cylindrical throughout and gently curved outwards.</p> <p>The material from BIOCAL 1 stn DW 66 has slightly larger nematocysts (cf. Table 9) and the hydrothecae are less strongly directed outwards (Fig. 8E).</p> <p> <i>Acryptolaria encarnae</i> n. sp. resembles <i>A. abies</i> in the straight branches and general shape of the hydrotheca but the two species are easily distinguishable because in <i>A. abies</i> the hydrothecae are much smaller (cf. Peña Cantero <i>et al.</i> 2007: table I) as also applies to the nematocysts (11.2 × 4.6 µm in the lectotype).</p>Published as part of <i>Peña Cantero, Álvaro L. & Vervoort, Willem, 2010, Species of Acryptolaria Norman, 1875 (Cnidaria, Hydrozoa, Lafoeidae) collected in the Western Pacific by various French expeditions, with the description of nineteen new species, pp. 267-332 in Zoosystema 32 (2)</i> on pages 284-286, DOI: 10.5252/z2010n2a5, <a href="http://zenodo.org/record/4521008">http://zenodo.org/record/4521008</a>
Vehicle-assisted bridge damage assessment using deep learning
No full textThis thesis introduces innovative methodologies for vehicle-assisted bridge health monitoring, aiming to improve maintenance procedures of ageing infrastructure, a critical concern for transport network owners. By taking advantage of advancements in sensing technology and the increasing interconnectivity between vehicles and infrastructure, these methodologies focus on developing an automated bridge assessment method that efficiently evaluates the current condition of bridge structures. This approach enables more accurate and timely maintenance decisions.
The primary objective of this thesis is to create an automated bridge assessment framework for existing bridges by harnessing the synergy between sensors installed on structures and signals transmitted by passing vehicles. By gathering comprehensive information from various sources, including vehicles and the bridge itself, and fusing this data using deep learning techniques, the framework efficiently evaluates the current condition of bridge structures, facilitating more precise and prompt maintenance decisions.
The thesis comprises several studies investigating deep learning techniques, such as deep autoencoders (DAE) and probabilistic temporal autoencoders (PTAE), for extracting features and capturing temporal relationships in the data. This enables accurate identification and quantification of potential damage in bridge structures.
The first study (Paper IA IB) examines an indirect bridge monitoring system using vertical acceleration responses from a fleet of vehicles passing over a healthy bridge. This study’s findings reveal that the error in signal reconstruction from the trained DAE is sensitive to damage, considering the distribution of results from multiple separate vehicle-crossing events. The proposed method proves effective in detecting damage under operational conditions and demonstrates potential as a new tool for cost-effective bridge health monitoring.
The second study introduces a methodology for assessing bridge conditions using a PTAE and multi-sensor data from a fixed sensing framework, collected during train crossings. The study’s results indicate that the proposed method can detect damage with a limited number of sensors, making it a valuable approach to enhance bridge safety. An Exponentially Weighted Moving Average (EWMA) filter and a control chartbased threshold mechanism are applied to further refine the damage assessment process, distinguishing between healthy and progressively deteriorating damage cases.
The third study proposes a Probabilistic Deep Neural Network framework for damage assessment, combining vehicle and bridge responses to extract damage-sensitive features for classifying different damage states. The findings of this study demonstrate that incorporating multiple sensor information reduces uncertainties in damage detection and localisation. The results also suggest that the proposed method is robust in handling measurement noise and varying environmental conditions.
In conclusion, this thesis advances knowledge in the field of structural assessment through structural health monitoring by providing insights and improvements in techniques and methodologies. By taking advantage of the combined strengths of sensors mounted on structures and signals transmitted by moving vehicles, the developed methodologies provide reliable and precise damage evaluation capabilities. These valuable insights enhance bridge safety, improve resource allocation, and contribute to the overall performance of transport networks. Ultimately, this approach leads to more sustainable and resilient infrastructure, better equipped to handle modern society’s growing demands
Autonomy and emancipation : the meanings of independence during the process of emergence of the provinces-state from the Littoral region (1811-1816)
No full textFil: Cantero, Oscar Daniel. Universidad Nacional de Misiones. Facultad de Humanidades y Ciencias Sociales; Argentina.Sostener que el 9 de julio de 1816 se declaró la independencia que terminó de configurar la Nación Argentina inconscientemente implica reproducir una operación cultural que niega los múltiples proyectos de organización que se dieron en el ámbito rioplatense en la segunda década del siglo XIX. Esta percepción excluye a las provincias del Litoral, que por entonces formaban parte de la Liga Federal, por lo que no enviaron diputados a Tucumán. En este ámbito la palabra “independencia” no remitía solamente a la emancipación respecto a España, sino también a la autonomía de las provincias y a su separación de la Intendencia de Buenos Aires, a la que estaban subordinadas hasta entonces. Muchas de estas ideas estuvieron influenciadas por la experiencia revolucionaria paraguaya, a la cual hasta ahora le dio poca importancia la historiografía argentina. Es válido, entonces, hablar de “independencias” para poner en evidencia esta multiplicidad de sentidos posibles.Supporting that on 9th July 1816 independence was declared, meaning that this was the end of the Argentinian Nation’s configuration, unconsciously leads to reproduce a cultural operation which denies multiple organization projects taken place in the Rio de la Plata field during the second decade of the XIX Century. This perception excludes the Littoral provinces, which were part of the “Federal League” by then, and consequently they did not send their representatives to Tucumán. In this sense, “independence” did not mean only the emancipation from Spain, but also the autonomy of provinces and their separation from the Intendancy of Buenos Aires to which they had been subordinated until then. Many of these ideas were influenced by the Paraguayan revolutionary experience, which has not been attached much importance by the Argentinian historiography until now. It is acceptable though, to talk about “independencies” to demonstrate this multiplicity of possible meanings
Oswaldella antarctica ? (Jaderholm 1904
No full textOswaldella antarctica? (Jäderholm, 1904) (*) Oswaldella antarctica — Briggs, 1938: 38 –40. Remarks. It is not possible to determine if the material studied by Briggs (1938) belongs to this species. This author indicated that his specimens were much larger than those described by Jäderholm (1904). We believe that Briggs’s (1938) material could belong to Oswaldella stepanjantsae Peña Cantero, Svoboda & Vervoort, 1997b, but it would be necessary to revise his material to resolve this issue. Ecology and distribution. Briggs (1938) reported this species from Commonwealth Bay, at depths between 630 and 720 m.Published as part of Peña Cantero, Álvaro L. & Marzal, Marina Fresneda, 2018, Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica), pp. 121-136 in Zootaxa 4441 (1) on page 133, DOI: 10.11646/zootaxa.4441.1.7, http://zenodo.org/record/130192
cola de gato
No full textLa información de esta miniguía se basa en los trabajos de los investigadores Ricardo Bueno Paul Gendrop y Ángeles Cantero A.Este asentamiento ha sido arquitectónicamente designado para los años 600 a 830 d.C., Clásico Tardío; periodo en que se construyen la mayor parte de sus estructuras. Las características de sus construcciones parecen indicar que la mayor parte de ellas fueron habitadas por la élite local, que para el periodo Posclásico las abandonaron, tal y como sucedió en gran parte de las ciudades de esta región. El área de distribución de sus estructuras mayores abarca aproximadamente 3 km.</p
Acryptolaria niobae Peña Cantero & Vervoort 2010, n. sp.
No full text<i>Acryptolaria niobae</i> n. sp. (Figs 19; 30; 32C; Table 20) <p> TYPE MATERIAL. — <b>Loyalty Islands.</b> BIOCAL 1, stn DW 08, 20°34.351’- 20°35.092’S, 166°53.904’- 166°54.051’E, 435 m, 12.VIII.1985, 1 stem <i>c.</i> 23 mm high, holotype (MNHN-Hy.2009-0167).</p> <p> <b>Norfolk Ridge.</b> CHALCAL 2, stn DW 76, 23°40.50’S- 167°45.20’E, 470 m, 30.X.1986, 1 stem 25 mm high, paratype (MNHN-Hy.2009-0156, slide); 1 stem 35 mm high, paratype (RMNH-Coel. no. 35020, slides 448).</p> <p> OTHER MATERIAL EXAMINED. — <b>Loyalty Islands.</b> BIOGEOCAL, stn CP 290, 20°36.01’- 20°37.26’S, 167°03.34’- 167°03.60’E, 920- 760 m, 27.IV.1987, 1 basally broken, unbranched stem <i>c.</i> 15 mm high (MNHN-Hy.2009-0155, slide).</p> <p> <b>Norfolk Ridge.</b> BIOCAL 1, stn DW 66, 24°55.435’- 24°54.849’S, 168°21.678’- 168°21.995’E, 515- 505 m, 3.IX.1985, 1 stem <i>c.</i> 16 mm high in slide (MNCN 2.03/398).</p> <p> ETYMOLOGY. — The specific name <i>niobae</i> is a dedication to Níobe Peña Sancho, daughter of the first author. It is a noun in female genitive.</p> <p> ECOLOGY AND DISTRIBUTION. — <i>Acryptolaria niobae</i> n. sp. originates from the Loyalty Islands and the Norfolk Ridge areas where it was collected at depths between 435 and 920 m.</p> <p>DESCRIPTION</p> <p>Stems up to 23 mm high, very scarcely branched (Fig. 32C); the largest stem with just a primary branch giving rise to a secondary one. Branches with an inconspicuous zigzag arrangement (Fig. 19A).</p> <p> Hydrothecae alternately arranged in approximately one plane (Fig. 19A), tubular (Fig. 19), cylindrical in distal fourth, diameter slightly decreasing basally and reaching minimum diameter a little above the point where the hydrotheca becomes adnate. At that point the hydrotheca widens slightly and contributes to the formation of an expanded part of the branch (Fig. 19C); the diameter at adnate part remains roughly uniform (Fig. 19). Free part of hydrotheca basically straight, strongly directed outwards due to sharp inflection at the point where the hydrotheca becomes free. Hydrotheca adnate for approximately one-fifth of its adcauline wall (adnate/free ratio 0.2); that wall straight at adnate part and straight or slightly convex at its free portion; abcauline wall slightly concave, straight at distal part. Hydrothecal aperture circular, oblique and directed upwards, forming an angle of <i>c.</i> 45° with long axis of internode. Rim even, frequently with a few short renovations (Fig. 19A).</p> <p>Large nematocysts relatively large and bananashaped (Fig. 30).</p> <p>Coppinia not found.</p> <p>REMARKS</p> <p> <i>Acryptolaria niobae</i> n. sp. is a very peculiar species.It resembles <i>A. infinita</i> n. sp. in the long hydrothecae and in the colony structure, having only few ramifications and branches with a slight zigzag disposition. Nevertheless, they are distinguishable by several features.First of all the hydrotheca in <i>A. infinita</i> n. sp. is smoothly curved outwards,lacking the characteristic widening at the point where hydrotheca and branch meet observed in <i>A. niobae</i> n. sp. Moreover, in <i>A. infinita</i> n. sp. the hydrotheca is approximately cylindrical at the free portion and much larger. They also differ in the size of the nematocysts, which are much smaller in <i>A. infinita</i> n. sp. (14.8 × 8.1 Μm), and in the extremely small adnate portion of the hydrotheca in <i>A. niobae</i> n. sp.</p>Published as part of <i>Peña Cantero, Álvaro L. & Vervoort, Willem, 2010, Species of Acryptolaria Norman, 1875 (Cnidaria, Hydrozoa, Lafoeidae) collected in the Western Pacific by various French expeditions, with the description of nineteen new species, pp. 267-332 in Zoosystema 32 (2)</i> on pages 304-305, DOI: 10.5252/z2010n2a5, <a href="http://zenodo.org/record/4521008">http://zenodo.org/record/4521008</a>
Acryptolaria medeae Peña Cantero & Vervoort 2010, n. sp.
No full text<i>Acryptolaria medeae</i> n. sp. (Figs 16; 30; 32B; Table 17) <p> TYPE MATERIAL. — <b>NW New Caledonia.</b> MUSORSTOM 4, stn CP 195, 18°54.8’S, 163°22.2’E, 465 m, 19.IX.1985, 1 stem 70 mm high, with coppinia, holotype (MNHN- Hy.2009-0166); 1 stem <i>c.</i> 23 mm high, paratype (RMNH- Coel. no. 31518).</p> <p>OTHER MATERIAL EXAMINED. — Stn DW 197, 18°51.3’S, 163°21.0’E, 560 m, 20.IX.1985, 2 stems up to 80 mm high (MNCN 2.03/424).</p> <p> ETYMOLOGY. — The specific name <i>medeae</i> is a dedication to Medea Peña Sancho, daughter of the first author; “medeae” is a noun in genitive singular.</p> <p> ECOLOGY AND DISTRIBUTION. — <i>Acryptolaria medeae</i> n. sp. was collected at depths between 465 and 560 m off NW New Caledonia.</p> <p>DESCRIPTION</p> <p>Palm-shaped stems up to 80 mm high (Fig. 32B), with the appearance of gorgonids and a disc-shaped hydrorhiza for attachment to hard substratum. Branching extremely abundant (up to sixth-order branches observed) and irregular, but strictly in one plane. Stem deprived of branches for the first few millimetres and then with continuous branching with numerous anastomoses, giving stems the aspect of a mesh. Branches slightly sinuous (Fig. 16A).</p> <p> Hydrothecae alternately arranged in approximately one plane (Fig. 16A, B), almost cylindrical, but imperceptibly widening basally (Fig. 16A, B); later diameter sharply decreasing at hydrothecal base. Hydrotheca gently curved outwards; adcauline wall adnate to internode for over two-thirds of its length (adnate/free ratio 2.6), convex. Abcauline wall straight or convex at basal half, concave at distal half, with a strong development of the perisarc which is strongly reduced just over hydrotheca underneath (Fig. 16A, B). Hydrothecal aperture circular, oblique and directed upwards, forming an angle of <i>c.</i> 40° with long axis of branches. Rim even, sometimes with short renovations (up to 13 observed).</p> <p>Large nematocysts relatively large and ovoid (Fig. 30).</p> <p>Coppinia fusiform, 22 mm long and 3 mm in diameter, consisting of closely set (Fig. 16C), flaskshaped gonothecae provided with a long distal neck ending in a circular aperture with even rim (Fig. 16C, D). Gonothecal walls coalesced with strong development of the perisarc (Fig. 16D); defensive tubes absent.</p> <p>REMARKS</p> <p> <i>Acryptolaria medeae</i> n. sp. is characterized by the gorgonian-like appearance of the stems, much branched in one plane and with many anastomoses which give them a compact aspect, the strong development of perisarc at the abcauline wall of the hydrotheca, and the fairly wide gonothecae. The large nematocysts are abundant.</p> <p> This new species is close to <i>A. disordinata</i> n. sp. in stem structure, being much branched in one plane, and by the presence of a strong perisarc development in the abcauline hydrothecal wall. Nevertheless they distinctly differ in the nematocysts which in <i>A. disordinata</i> n. sp. are larger (25.6 × 9.4 µm). Furthermore in the latter the branches strongly widen where the hydrothecae become free, the strong development of perisarc of the abcauline wall reaches the hydrotheca situated below, the cylindrical hydrothecae are larger and, finally, the gonothecae are in a chaotic disposition in the coppinia.</p>Published as part of <i>Peña Cantero, Álvaro L. & Vervoort, Willem, 2010, Species of Acryptolaria Norman, 1875 (Cnidaria, Hydrozoa, Lafoeidae) collected in the Western Pacific by various French expeditions, with the description of nineteen new species, pp. 267-332 in Zoosystema 32 (2)</i> on pages 299-300, DOI: 10.5252/z2010n2a5, <a href="http://zenodo.org/record/4521008">http://zenodo.org/record/4521008</a>
Maximum dynamic stress on bridges traversed by moving loads
No full textMost current research on dynamic effects due to traffic load on simply supported bridges focuses on the mid-span section of the bridge, since this location corresponds to the worst static bending moment. However, the maximum total moment allowing for dynamics, may differ considerably from the maximum moment at mid-span. This paper shows how the maximum can occur in a section relatively far from mid-span with a significant difference in magnitude.Other funderJournal websitewww.bridgesjournal.comEuropean 6th Framework Programme ARCHES (Assessment and Rehabilitation of Central European Highway Structures)Publisher requires the journal URL to appear on the record: www.bridgesjournal.com. Could use Description web link: Journal website as in http://hdl.handle.net/10197/2437? - AV 1/11/2010 au ke SB. 15/11/'1
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