7,829 research outputs found
Pacifigorgia sculpta Breedy & Guzman, 2004, new species
No full textPacifigorgia sculpta, new species (Figs. 1 G–H, 5 A–C) Material examined. Holotype: UCR 1497, Islote Frailes, Península de Azuero, 10–30 m, H.M. Guzman, 9 December 2001. Paratypes: MCZ 57053, Islote Frailes, 10–30 m, H.M. Guzman, 9 December 2001; STRI 389–390, Isla Jicarita, Gulf of Chiriquí, 20 m, H.M. Guzman, 8 August 2002; STRI 410–412, Isla Seca Grande, Gulf of Chiriquí, 20 m, H.M. Guzman and O. Breedy, 26 August 2002; STRI 454, Isla Roncadores, Gulf of Chiriquí, 10–20 m, H.M. Guzman and O. Breedy, 30 August 2002; STRI 476, 482, 497, Bajo Foul, Península de Azuero, 15 m, H.M. Guzman, 11 April 2003; STRI 602, Islote Frailes, 20 m, H.M. Guzman, 1 May 2003; STRI 628, Roca Catedral, 5–15 m, H.M. Guzman, 3 May 2003; STRI 650, Bajo Brincanco, Gulf of Chiriquí, 10–30 m, H.M. Guzman, 5 May 2003; STRI 718, 721–722, 729 – 731, 734, Bajo Trollope, Gulf of Panama, 10–20 m, H.M. Guzman, 6 August 2003; UCR 1037, 1042, Islote Frailes, 10–20 m, H.M. Guzman, 6 August 2003; UCR 1171, 1173, 1175, 1177, 1179, 1181, 1183, 1505, Roca Niagara, Gulf of Panama, 10–20 m, H.M. Guzman, 13 December 2001; UCR 1361 –1365, 1506, Piedra Hacha, 20–30 m, H.M. Guzman, 22 April 2002; UCR 1498, Isla Jicarita, Gulf of Chiriquí, 20–30 m, H.M. Guzman, 19 April 2002; UCR 1499, 1501, 1508, Islote Frailes, 10–30 m, H.M. Guzman, 12 December 2001. Description. Colonies wider than high, up to 120 mm in height and 200 mm in width. Most of the colonies are composed of a single fan, but some have two or three secondary fans that radiate from different parts of the main fan and grow parallel. Colour when preserved or alive is dark orange or reddish brown with lighter hues at the tips, and light ochre when dry. Colonies have a large holdfasts, and fans grow directly from this or sprout from short stems (up to 7 mm in diameter). Network is irregular. Meshes are very open (about 2–3 meshes/cm ²), mostly elongate, up to 45 mm in length, and 25 mm in width. Mesh branches are squarish in section, from 3 mm thick at their base to 1 mm at their tips. No midribs cross the fans, just some thick branches (up to 6 mm in diameter) at the base that diminish and merge with the fan. Endbranchlets are long; up to 25 mm in length. Freetwigs are abundant, up to 15 mm in length; they stick out from the fans, twist and grow parallel as free branches. The polyps are retracted within domeshaped coenenchymal mounds, which are prominent and arranged mostly in pairs along the sides of the branches. In dry specimens, the lateral distribution of the calices is more evident, and bands of coenenchyme are clear between them. The polyps are yellowish with rods arranged in strong, thick points, with some untidily arranged intermediate rods. The anthocodial rods are long, colourless or pale yellow (up to 0.18 mm in length and 0.02 mm in width). The coenenchymal sclerites are very ornamented, and are mostly large spindles (up to 0.22 mm in length, and 0.06 mm in width) with up to 8 complete whorls of tubercles, and warty ends. They are redorange to pale yellow and bicoloured, and together with P. s e n t a, include the longest spindles found in the genus. Capstans are less abundant in the slide samples; they are scarcely ornate, with only short tubercles. Holotype. The holotype (Fig. 1 G) is a single fan, 100 mm in height and 135 mm in width. Part of the holdfast was left behind when the specimen was collected. The preserved colony is reddish brown colony. Mesh branches are thick, about 2 mm in diameter. Numerous free twigs radiate from the fan as free branchlets. Endbranchlets reach 12 mm. Coenenchymal sclerites are redorange, pale yellow and bicoloured. They are mostly large spindles (up to 0.18 mm in length, and 0.06 mm in width) with 4–8 complete whorls of delicately sculpted tubercles, and with elongated warty ends, blunt, or acute (Fig. 5 A). There are also small, pale yellow capstans (up to 0.05 mm in length and 0.03 mm in width), and larger ones (up to 0.08 mm in length by 0.04 mm in width) with short, moderately warty tubercles (Fig. 5 B). Anthocodial sclerites are pale yellow. They are thin, long rods (up to 0.17 mm in length and 0.02 mm in width) with dentate margins and have acute, small warts, concentrated at the ends (Fig. 5 C). Remarks. This species is very similar to P. s e n t a, however, P. senta attains a larger size, the mesh branches are thinner, the meshwork finer (up to 23 mm long), and the colony has a more delicate appearance in comparison to the more robust P. sculpta. Dry specimens of P. s e n t a are brittle and the sclerites fall off easily, which is not the case in dry specimens of P. sculpta. Sclerites in both species are the largest recorded for the genus. Spindles in P. s e n t a and in P. sculpta reach the same size (up to 0.22 mm in length, and 0.06 mm in width), however, in P. s e n t a, the spindles have more whorls of tubercles (up to 10) than in P. sculpta (up to 8); thus sclerites of the latter have larger spaces between the whorls (and very warty tubercles). Capstans of both species are of similar shapes, but smaller sizes are reported for P. s e n t a (up to 0.06 mm in length) (Breedy & Guzman 2003 b). The colour of coenenchymal sclerites is definitely different. In all of the specimens of P. sculpta examined, two layers of differently coloured sclerites are clearly defined: reddishorange sclerites in the inner coenenchyme and pale yellow on the surface. In P. s e n t a, on the other hand, all sclerites are of the same colour; brownish pink to colourless. Anthocodial rods are also different, being shorter (up to 0.14 mm in length) and less spiny in P. s e n t a. We have found P. s c u l p t a at several localities in the Gulf of Chiriquí, and also from two sites in the Gulf of Panama, down to 30 m in depth. Breedy & Guzman (2003 b) pointed out that Stiasny (1943) dealt with a species from Isla del Rey, Gulf of Panama, sent to him by Hickson, which agrees with P. senta. Therefore, it was expected that P. s e n t a would be found to occur in Panama. Pacifigorgia senta has been collected from deeper waters, down to 40 m in Costa Rica. In recent collections made by dredging 35–60 m in depth, in Panamá, specimens of P. senta were indeed found, thus the occurrence of P. s e n t a is herein reported and confirmed. Curiously, both P. senta and P. sculpta, were collected together in the same dredge, what indicates that they may occur together. Habitat. Found from 10–40 m in depth, on vertical basaltic walls, living together with large P. e x i m i a colonies and many other octocorals. Though abundant in some places, this species is never the dominant species. Etymology. An adjective (L), sculptus = carved, in allusion to the ornamentation of the spindles. Distribution. Found widely distributed along Gulf of Panama, Gulf of Chiriquí, and Península de Azuero.Published as part of Breedy, Odalisca & Guzman, Hector M., 2004, New species of the gorgoniian genus Pacifigorgia (Coelenterata: Octocorallia: Gorgoniidae) from Pacific Panama, pp. 1-15 in Zootaxa 541 on pages 12-14, DOI: 10.5281/zenodo.15770
Leptogorgia cofrini Breedy & Guzman 2005
No full text<i>Leptogorgia cofrini</i> Breedy & Guzman, 2005 <p>(Fig. 36A, 65)</p> <p> <i>Leptogorgia cofrini</i>. Breedy & Guzman, 2005: 3–9.</p> <p> <b>Material examined.</b> Holotype: UCR 398A, preserved, Islas Tortugas, Golfo de Nicoya, Costa Rica, 1.5 m, J. Cortés, 18 July 1985.</p> <p>Other material examined: PANAMA: ZMUC-ANT 129 q, s, u, v, Taboguilla Island, 5 m, T. Mortensen, 2 November 1915.</p> <p> <b>Diagnosis</b> (according to Breedy & Guzman 2005). Small, white colonies, up to 7 cm in length, and 5 cm in width. Axis cylindrical. Growth form upright, branching abundant, and in multiple planes with a single stem, reaching up to 3 mm in height before branching, or multiple stems (up to 4). Polyps sparsely placed all around branches, fully retractile. Sclerites colourless, and mostly capstans, up to 0.09 mm in length, and spindles, up to 0.12 mm in length, and long anthocodial rods up to 0.14 mm in length. The illustrated specimen is a colony 7.0 cm in length, and 6.0 cm in width.</p> <p> <b>Description.</b> Full description in Breedy & Guzman 2005.</p> <p> <b>Distribution.</b> Islas Tortugas, Golfo de Nicoya: type locality. Commonly found along the Pacific coasts of Costa Rica, and Panama (Table 2, Fig. 65).</p>Published as part of <i>Published, First, 2007, A revision of the genus Leptogorgia Milne Edwards & Haime, 1857 (Coelenterata: Octocorallia: Gorgoniidae) in the eastern Pacific, pp. 1-90 in Zootaxa 1419</i> on page 2
Experimental application of a dynamic observer to capture and predict the dynamics of a flat-plate boundary layer
No full textThe recent approach, proposed by Guzman-Inigo et al. \cite{GuzmanInigo2014}, using System Identification to derive a Reduced Order Model from snapshots of a flow is applied to a transitional boundary layer growing over a flat-plate. It is shown that such an approach can indeed be applied to experimental PIV snapshots. Using a proper learning dataset and a proper local sensor, it is shown that the evolution of boundary layer can be properly estimated from the time evolution of the local probe and with no more than ten POD modes for the Reduced Order Model. The influence of the various parameters on the efficiency of the system identification technique is discussed
Pacifigorgia catedralensis Breedy & Guzman, 2004, new species
No full text<i>Pacifigorgia catedralensis</i>, new species <p>(Figs. 1A–B, 2 A–E)</p> <p> <b>Material examined</b>. <b> <i>Holotype</i>:</b> UCR 1514, Roca Catedral, Gulf of Chiriquí, 5–15 m, H.M. Guzman, 3 May 2003.</p> <p> <b> <i>Paratypes</i>:</b> MCZ 57050, same data as holotype; UCR 1515, STRI 616A, same data, but 2 May 2003.</p> <p> <b>Description</b>. Colonies wider than high, up to 150 mm in height, and 200 mm in width, composed of multiple fans. New fans radiate from the base of the main axis or from different parts of the colony at different levels, and extend in various directions to produce complex arrangements. Colour when preserved or alive is purple, which fades when dry. Under a dissecting microscope, the surface of the branches show a layer of dark purple sclerites on a white, more densely packed layer of sclerites. Colonies develop a strong, elongate holdfast, and the fans grow directly from this, or are elevated above the substrate on short, thick stems. Network is regular and of closed meshes (about 6–7 meshes/cm²), with sizes up to 10 mm in length and 3 mm in width (Fig. 1B). Mesh branches are squarish in section, up to 2.0 mm thick. No distinct midribs were observed, but some thick branches at the base, up to 5 mm in width, extend for a short distance, up to 15 mm, into the fans. Endbranchlets are short, less than 2 mm in length. A few free­twigs project perpendicular to the fans, and reach up to 3 mm in length. The polyps are retracted within dome­shaped coenenchymal mounds which are slightly raised, and closely packed. They are arranged in pairs in longitudinal rows along the branches. Polyps are white with pink, and light purple rods arranged in points. Coenenchymal sclerites are mainly dark purple, white or colourless, and some partially tinted (up to half or up to three quarters of the sclerite). They are mostly wide, strongly tuberculated capstans and spindles. A combination of wide, dark purple capstans and spindles, and small colourless capstans (half the size of the large ones) was always observed in microscopic preparations. The occurrence of large, wide, anthocodial rods with smooth margins is very characteristic in this species.</p> <p> <b>Holotype</b>. The holotype (Fig. 1A) is 110 mm in height, and 150 mm in width. It is formed by two main fans joined at a 90° angle, and two small secondary fans that radiate perpendicularly to one of the main fans. The colony is attached to a small basalt rock by the holdfast. The main fan rises directly from the substrate with a thick branch (5 mm in diameter) which divides in two (about 3 mm in diameter), and extends a short distance into each fan. The preserved colony is purple, with polyps partially expanded showing the anthocodial rods arranged in clearly marked points. Coenenchymal sclerites are mostly wide spindles (up to 0.12 mm in length and 0.05 mm in width) with 4–6 complete whorls of tubercles or a complex arrangement of warts, and oval forms (up to 0.10 mm in length and 0.05 mm in width) (Fig. 2 A). Most of these sclerites have both ends rounded and blunt, but others have one or both ends more pointed. Capstans are also wide (up to 0.10 mm in length and 0.05 mm in width) with warty tubercles, some with elongated, warty ends, or asymmetric, with one blunt end and the other acute (Fig. 2 B). Four­radiates (up to 0.06 mm by 0.06 mm) with warty tips (Fig. 2 C), and various immature types of sclerites are commonly found when sampling (Fig. 2 D). Anthocodial sclerites are large rods (up to 0.13 mm in length and up to 0.03 mm in width) with smooth or lobed margins (Fig. 2 E).</p> <p> <b>Habitat</b>. This species was the shallow dominant species at Roca Catedral, growing on basaltic rocks in strong currents, together with less abundant colonies of <i>Pacifigorgia</i> s <i>mithsoniana</i> new species.</p> <p> <b>Etymology</b>. The species is named after the type locality, Roca Catedral.</p> <p> <b>Remarks.</b> This species has some similarity to <i>Pacifigorgia tabogae</i> (Hickson, 1928) with respect to the colour of the anthocodial sclerites (pink) and their points arrangement, but the morphology of both the colony and the sclerites is different.</p> <p> <b>Distribution</b>. Only reported for the type locality..</p>Published as part of <i>Breedy, Odalisca & Guzman, Hector M., 2004, New species of the gorgoniian genus Pacifigorgia (Coelenterata: Octocorallia: Gorgoniidae) from Pacific Panama, pp. 1-15 in Zootaxa 541</i> on pages 3-4, DOI: <a href="http://zenodo.org/record/157702">10.5281/zenodo.157702</a>
Initiation of electrographic seizures by neuronal networks in entorhinal and perirhinal cortices in vitro
No full textThe hippocampus is often considered to play a major role in the pathophysiology of mesial temporal lobe epilepsy. However, emerging clinical and experimental evidence suggests that parahippocampal areas may contribute to a greater extent to limbic seizure initiation, and perhaps epileptogenesis. To date, little is known about the participation of entorhinal and perirhinal networks to epileptiform synchronization. Here, we addressed this issue by using simultaneous field potential recordings in horizontal rat brain slices containing interconnected limbic structures that included the hippocampus proper. Epileptiform discharges were disclosed by bath applying the convulsant drug 4-aminopyridine (50 muM) or by superfusing Mg(2+)-free medium. In the presence of 4-aminopyridine, slow interictal- (duration=2.34+/-0.29 s; interval of occurrence=25.75+/-2.11 s, n=16) and ictal-like (duration=31.25+/-3.34 s; interval of occurrence=196.96+/-21.56 s, n=17) discharges were recorded in entorhinal and perirhinal cortices after abating the propagation of CA3-driven interictal activity to these areas following extended hippocampal knife cuts. Simultaneous recordings obtained from the medial and lateral entorhinal cortex, and from the perirhinal cortex revealed that interictal and ictal discharges could initiate from any of these areas and propagate to the neighboring structure with delays of 8-66 ms. However, slow interictal- and ictal-like events more often originated in the medial entorhinal cortex and perirhinal cortex, respectively. Cutting the connections between entorhinal and perirhinal cortices (n=10), or functional inactivation of cortical areas by local application of a glutamatergic receptor antagonist (n=11) made independent epileptiform activity occur in all areas. These procedures also shortened ictal discharge duration in the entorhinal cortices, but not in the perirhinal area. Similar results could be obtained by applying Mg(2+)-free medium (n=7). These findings indicate that parahippocampal networks provide independent epileptiform synchronization sufficient to sustain limbic seizures as well as that the perirhinal cortex plays a preferential role in in vitro ictogenesis. (C) 2004 IBRO. Published by Elsevier Ltd. All rights reserved
Are you sitting comfortably? The political economy of the body
No full textThe aim of this paper is to examine the relationship between the mass production of furniture in modern industrial societies and lower back pain (LBP). The latter has proven to be a major cost to health services and private industry throughout the industrialised world and now represents a global health issue as recent WHO reports on obesity and LBP reveal. Thus far there have been few co-ordinated attempts to deal with the causes of the problem through public policy. Drawing upon a range of sources in anthropology, health studies, politics and economics, the paper argues that this a modern social problem rooted in the contingent conjuncture of natural and social causal mechanisms. The key question it raises is: what are the appropriate mechanisms for addressing this problem? This paper develops an analysis rooted in libertarian social theory and argues that both the state and the capitalist market are flawed mechanisms for resolving this problem. There remains a fundamental dilemma for libertarians, however. Whilst the state and the market may well be flawed mechanisms, they are the dominant ones shaping global political economy. To what extent can libertarians work within these structures and remain committed to libertarian goals
Human pose estimation in presence of occlusion using depth camera sensors, in human-robot coexistence scenarios
No full textR. P. De Guzman et M. A. Reforma. Government and Politics of the Philippines J. S. T. Quah, C. H. Chan et C. M. Seah. Government and Politics of Singapour Somsakdi Xuto. Government and politics of Thailand
No full textLechervy. R. P. De Guzman et M. A. Reforma. Government and Politics of the Philippines J. S. T. Quah, C. H. Chan et C. M. Seah. Government and Politics of Singapour Somsakdi Xuto. Government and politics of Thailand. In: Politique étrangère, n°2 - 1989 - 54ᵉannée. p. 355
R. P. De Guzman et M. A. Reforma. Government and Politics of the Philippines J. S. T. Quah, C. H. Chan et C. M. Seah. Government and Politics of Singapour Somsakdi Xuto. Government and politics of Thailand
No full textLechervy. R. P. De Guzman et M. A. Reforma. Government and Politics of the Philippines J. S. T. Quah, C. H. Chan et C. M. Seah. Government and Politics of Singapour Somsakdi Xuto. Government and politics of Thailand. In: Politique étrangère, n°2 - 1989 - 54ᵉannée. p. 355
Compendio de las obligaciones, excelencias, privilegios, è indulgencias del V. Orden Tercero de Penitencia de N.P.S. Francisco : con la novissima Constitucion de N. Smo. P. Benedicto XIII ...
No full textLicencia fechada en Sevilla en 1726Sign.: *\p8\s, 2[flor]\p6\s, A-Z\p8\s, 2A\p8\s, 2B\p10\sLa h. de grab. calc. es un retrato de S. Francisc
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