57 research outputs found
Relativizando as identidades: Vitor Ramil e a estética do frio
No full textThis article presents the questions raised in the essay A estética do frio (The aesthetics of the cold) (2004), written and published by the musician and composer from Rio Grande do Sul, Vitor Ramil. In the essay, the author exposes some cultural differences existing in Brazil, showing that southern cultural production has more affinity with neighboring countries, Uruguay and Argentina, than with other Brazilian regions. For Ramil, this happens due a symbolic division of the country between hot Brazil and cold Brazil, in which cultural products that are not related to the representation of a warm and tropical aesthetic tend to be restricted to regional consumption. In parallel, throughout the text, we seek to analyze how this cold aesthetic defended by Ramil is dependent of the hot aesthetic to exist as a cultural representation. Although there are divergences and contrasts (of climate, landscape, territory, identity), this apparent antagonism is complementary regarding of the construction of artistic identity for the pampas musicians, functioning as a game of mirrors among the actors involved.Este artigo apresenta os questionamentos levantados no ensaio A estética do frio (2004), escrito e publicado pelo músico e compositor gaúcho Vitor Ramil. No ensaio, o autor expõe algumas diferenças culturais existentes no Brasil, mostrando que a produção cultural sulista tem mais afinidade com os países vizinhos, Uruguai e Argentina, do que com as demais regiões brasileiras. Para Ramil, isso ocorre devido a uma divisão simbólica do país entre Brasil quente e Brasil frio, na qual os produtos culturais que fogem da representação de uma estética quente e tropical, tendem a ficar restritos ao consumo regional. Em paralelo, no decorrer do texto, buscamos analisar como essa estética fria defendida por Ramil é dependente da estética quente para existir enquanto representação cultural. Ainda que havendo divergências e contrastes (de clima, paisagem, território, identidade), esse aparente antagonismo é complementar no que se refere à construção de identidade artística para os músicos dos pampas, funcionando como um jogo de espelhos entre os atores envolvidos.
Double yolk eggs detection using fuzzy logic.
No full textChicken egg products increased by 60% worldwide resulting in the farmers or traders egg industry. The double yolk (DY) eggs are priced higher than single yolk (SY) eggs around 35% at the same size. Although, separating DY from SY will increase more revenue but it has to be replaced at the higher cost from skilled labor for sorting. Normally, the separation of double yolk eggs required the expertise person by weigh and shape of egg but it is still high error. The purpose of this research is to detect double-yolked (DY) chicken eggs with weight and ratio of the egg's size using fuzzy logic and developing a low cost prototype to reduce the cost of separation. The K-means clustering is used for separating DY and SY, firstly. However, the error from this technique is still high as 15.05% because of its hard clustering. Therefore, the intersection zone scattering from using the weight and ratio of the egg's size to input of DY and SY is taken into consider with fuzzy logic algorithm, to improve the error. The results of errors from fuzzy logic are depended with input membership functions (MF). This research selects triangular MF of weight as low = 65 g, medium = 75 g and high = 85 g, while ratio of the egg is triangular MF as low = 1.30, medium = 1.40 and high = 1.50. This algorithm is not provide the minimum total error but it gives the low error to detect a double yolk while the real egg is SY as 1.43% of total eggs. This algorithm is applied to develop a double yolk egg detection prototype with Mbed platform by a load cell and OpenMV CAM, to measure the weight and ratio of the egg respectively
Design of Observation Class Remotely Operated Vehicles (OCROV) for an Exploration Operation in Restricted Underwater Channel
No full textUnmanned underwater vehicles (UUVs) are currently one of the practical instruments to complete some human unreachable tasks such as deep-sea exploration, hazardous chemical-contaminated underwater areas, and very tight or narrow underwater channels. A remotely operated vehicle (ROV), one of the UUV categories, plays an important role in several missions and has been an active field of engineering research since its introduction. In this work, the new observation class ROV (OCROV) hull designs are introduced to provide more understanding of drag prediction, improve power management, and prolong the endurance. To represent the restricted underwater channel, the fluid domain duplicated the size of the underground water trunk main in Northern Bangkok with a diameter of 1000 mm is focused. The OCROV hull designs are based on a streamlined torpedo-like shape OCROV. Computational fluid dynamics (CFD) code with Reynolds-averaged Navier–Stokes (RANS) equations is used to calculate total resistance (RT), frictional resistance (RF), and pressure resistance (RP). The results for restricted areas are also compared against free stream (unbounded) conditions to introduce the blockage and its effects
Astrodendrum juancarlosi Calero & Ramil 2023, sp. nov.
No full textAstrodendrum juancarlosi sp. nov. urn:lsid:zoobank.org:act: ECD0622E-6FAF-4C72-B102-F1B94D8ECBFB Figs 3E–F, 7–9 Diagnosis Species with small granule-like external ossicles, ending in a crystalline point, covering the dorsal and lateral interradial areas of the disc. Ventral disc areas and arms covered by domed granule-like external ossicles without any crystalline point. Two or three terminal projections on each arm spine; one secondary teeth on each valve. Etymology The specific epithet ‘ juancarlosi ’ was chosen as a tribute to Mr Juan Carlos Calero, father of the first author. Material examined Holotype GUINEA BISSAU • 2 specs, 40.43–56.81 mm dd; 10°18′55″ N, 16°25′07″ W; depth 79 m; 4 Nov. 2008; Bissau-0810 exped.; stn BS200; Bissau-0810-06403; MNCN 29.02/1534. Paratypes GUINEA BISSAU • 2 specs, 28.20–51.16 mm dd; 11°08′07″– 11°09′33″ N, 17°15′20″– 17°15′44″ W; depth 109 m; 29 Oct. 2011; CCLME-1110 exped.; CCLME-1110 exped.; stn BT53; MHN USC-10132 -1 and 2 • 1 spec., 40.43 mm dd; 10°18′55″ N, 16°25′07″ W; depth 79 m; 4 Nov. 2008; Bissau-0810 exped.; Bissau-0810 exped.; stn BS200; MNCN 29.02/1535. WESTERN SAHARA • 1 spec., 44.62 mm dd; 26°26′23″– 26°25′06″ N, 14°25′30″– 14°26′23″ W; depth 67– 58 m; 29 Nov. 2011; CCLME-1110 exped.; CCLME-1110 exped.; stn BT215; CFM-IEOMA-7776. • 1 spec., 46.70 mm dd; 14°57′00″– 14°58′09″ N, 17°39′08″– 17°38′13″ W; depth 797 m; 25 May 2012; CCLME-1205 exped.; CCLME-1205 exped.; stn BT368; CCLME-1205-03248; LZM-UV. Additional material GUINEA BISSAU • 1 spec., 10.07 mm dd; 11°05′09″– 17°03′15″ N, 11°04′15″– 17°03′10″ W; depth 46–47 m; 26 Oct. 2008; Bissau-0810 exped.; stn BS151; Bissau-0810-06146; LZM-UV. Description (holotype) DISC. Five-lobed in shape, slightly excavated inter-radially (Fig. 8A), with no peripheral calcareous plates on rim. Radial shields tumid, long (almost raising the centre of disc) and narrow, which is deeply sunken (Fig. 8C). Radial shields completely concealed by external ossicles, bar-shaped, as wide proximally as distally, but more separated distally, converging towards centre of disc. Distally, radial shields end on enlarged, slightly concave and oval-shaped plate covered by minute granules (Fig. 8C–D). Dorsal disc covered by small granule-like external ossicles (Fig. 8A, C–D), each one ending in terminal crystalline point. At edge of disc, ossicles more densely packed and without crystalline point (Fig. 8C), and bigger in size between radial shields (Fig. 8C–D). Ossicles concealing radial shields similar to those from dorsal disc but more densely packed.Ventral inter-radial areas densely covered by mosaic of small irregular flat plates with granule-like external ossicles without terminal point. Oral shield, adoral shield, oral plates, along edge of mouth frame and ventral arm plates more densely covered by similar external ossicles. Mouth frame sunken (Fig. 8E). Interradial surface of lateral disc covered by external ossicles similar but smaller than those covering dorsal disc. Two large genital slits on each interradius running almost vertically along first five or six brachial segments after first fork (Fig. 8F). Conical external ossicles with terminal crystalline point more developed on adradial edge of genital slits. One oval-shaped and well-developed madreporite located just outside mouth frame (Fig. 8E). Both, tooth and oral papillae spiniform, especially larger apical ones. Mouth and infradental papillae form continuous series along mouth frame (Fig. 8E). Teeth varying in position and size, being irregular in outline and more or less irregularly disposed. ARMS. Arms branching, with first fork before disc margin and second one located at margin. Nevertheless, in smaller specimens (juvenile), first fork located on margin of disc. Arms tapering gradually towards tips, completely covered, both, dorsally and ventrally, by domed granule-like external ossicles (Fig. 9A); these granules somewhat bigger than disc ones and without any crystalline point. Dorsal side of arms carry pedicellarial bands along whole arms. Valves with one secondary tooth downwardly curved (Fig. 9C). Some sunken transverse furrow between segments, giving arms an annulated appearance. Indication observed of median furrow along arm (Fig. 8G). Ventral side of arms with noticeable transverse naked furrows between segments until second fork; afterwards, furrows become smaller, disappearing after third fork. First two pores without arm spine. Arm spines beginning at third pair of pores with only one small spine at third and fourth pair of pores, two arm spines (sometimes one) afterwards and three arm spines (sometimes two) after second fork. Arm spines short and wide, ending in two or three hyaline points (Fig. 9F). Vertebrae streptospondylous (Fig. 9G–K). COLOUR. Living specimens showing varying colours, from creamish-pink to dark orange and brown to gray (Fig. 3E–F) with clear ventral part; preserved specimens are white. OSSICLE MORPHOLOGY. External ossicles on dorsal surface of disc, including radial shields, are granule-shaped and ending in a crystalline point (Fig. 9A). Baseplates oval-shaped with three to five tubercleshaped articulations for pedicellarial (Fig. 9D). External ossicles on baseplates granule-like shaped, approximately 200 µm in length and 100 µm in height (Fig. 9B). Valves with single inner tooth downwardly directed, and reticular structure (Fig. 9C). Lateral arm plates long, bar-like, with tuberculous stereom, spines placed in external lobe of plate (Fig. 9E). Arm spines ovoid-shaped with two or three small projections, not transforming into hook-shaped spines on distal portion (Fig. 9F). Vertebrae with hourglass-shaped streptospondylous articulations (Fig. 9G–K). Branching vertebra wider and with two surfaces for articulation. Distribution This species has been recorded in the Northwest African coast, from the Western Sahara to Guinea-Bissau waters. Its bathymetric distribution ranges between 47 and 797 m. Remarks The genus Astrodendrum was established by Döderlein (1911) for Gornocephalus sagaminus Döderlein, 1902. He realised that all species that belong to Gorgonocephalus Leach 1815 are characterised by the presence of a well-developed belt of calcareous plates at the margins of the disc. However, species of Astrodendrum have no ring of calcareous plates at the rim. Additionally, the arm spines appear before the first fork, as in Gorgonocephalus; however, in Astrodendrum Döderlein, 1911, these arm spines are much smaller, hardly reaching ⅓ of the segment length, and their number is reduced: with three (or rarely four) on each side. Taxonomic studies dealing with this genus are scarce, and we have only found a revision of the genus recently published by Okanishi & Fujita (2018). According to these authors, the genus is characterised by having five branching arms, with less than six segments before the first fork; lack of calcareous plates on the edge of the disc margin; variously shaped external ossicles or no ossicles on the disc; a madreporite placed on the innermost part of the interradial lateral disc; and valves from the dorsal arms with one secondary tooth. Currently, only six species have been assigned to this genus. Among them, only Astrodendrum capense (Mortensen, 1933), described from Durban, South Africa (Mortensen 1933; Clark & Courtman-Stock 1976), has been found in the Atlantic Ocean – Namibia (Alva & Vadon 1989). Astrodendrum elingamita Baker, 1974 has been reported in New Zealand and Philippines (Baker 1974; Okanishi & Fujita 2018); Astrodendrum galapagense A.H. Clark, 1916 from Galapagos Islands; Astrodendrum laevigatum (Koehler, 1897) from Colombo (Sri Lanka); and Astrodendrum sagaminum (Döderlein, 1902) from Japan, East China Sea and Sri Lanka (Döderlein 1902, 1911; Clark 1911; Bomford 1913; Matsumoto 1917; Irimura & Kubodera 1998); and the recently described Astrodendrum spinulosum Okanashi & Fujita, 2018 also from Japan. In addition to the shape, size and arrangement of external ossicles – widely used as an important specific taxonomic character (Baker 1974, 1980; McKnight 2000) – Okanishi and Fujita (2018) included the possibility of the lack of external ossicles (as in the case of A. laevigatum), and they also proposed three new taxonomic characters to distinguish species of Astrodendrum: • absence/ presence of bulges on lateral ridges of proximal portion of arm • number of terminal projections of arm spines on proximal portion of arm • number of secondary teeth of hook-shaped arm spines on distal portion of the arm The main morphological features of all known species of Astrodendrum, including A. juancarlosi sp. nov., are summarized in Table 2. Astrodendrum spinulosum differs from the rest of species by the presence of bulges on lateral ridges of proximal portion of the arm. The new species here described, also differs from A. spinulosum by the number of terminal projections of arm spines on the proximal portion of the arm (three in the case of the new species and one in A. spinulosum). In addition, A. spinulosun has cone-shaped external ossicles, while A. juancarlosi sp. nov. has granule like ossicles ending in a crystalline point at the dorsal surface of the disc. Astrodendrum juancarlosi sp. nov. is more similar to A. elingamita in the shape of the ventral coverage and the lack of a scale in the first tentacle pore. Nevertheless, A. elingamita has the first fork in the margin of the disc, while it is located before the margin in our species. The polygonal plates of the ventral covering are closer in the A. elingamita than in our specimen. Our specimens also differ from A. elingamita by having one type of dome-shaped granules with 1–2 hyaline terminal points rather than two smooth types. Astrodendrum sagaminum differs from Astrodendrum juancarlosi sp. nov. in also having two types of granules and naked arms and ventral disk. Astrodendrum capense has several medium-sized conical tubercles along the radial shields; it also has some smaller conical tubercles along the inter-radial disc margin, both ending in small thorns. Moreover, the disc is closely covered with minute and smooth plates. Astrodendrum galapagense has a dorsal coarse armament on the disc and arms. The external ossicles on the aboral disc are plate-shaped at periphery and conical at center, both slightly in contact, while on the oral surface has a few small widely scattered granules, except in the ventral interbrachial areas. Astrodendrum laevigatum is covered by a thin, transparent, soft and perfectly smooth tegument without any granules or spines. According to the description of this species in the literature, there are some doubts about the inclusion of this species in the genus Astrodendrum. We consider necessary to review the type material before we can reach a conclusion on this issue. Therefore, in this paper we follow Okanishi & Fujita (2018) and keep the species within the genus Astrodendrum. Finally, our specimen has marked rectangular furrows that are absent in the rest of the species of Astrodendrum. Even though Mortensen (1933) described the underside of the arms of A. capense as flat and without any grooves, he pointed out that this “may be an indication of a transverse furrow between the segments from the first forking onwards” (Mortensen 1933: 286). See Table 2 for comparison of main morphological characteristics among species.Published as part of Calero, Belén & Ramil, Fran, 2023, Euryalida (Echinodermata, Ophiuroidea) from Northwest Africa, pp. 46-75 in European Journal of Taxonomy 870 on pages 59-67, DOI: 10.5852/ejt.2023.870.2117, http://zenodo.org/record/793861
O nascer depois do tempo : percorrendo a identidade migrante de Selbor em Satolep, de Vitor Ramil
Get PDFEste trabalho tem por objetivo analisar a trajetória do personagem Selbor, protagonista do romance Satolep, de Vitor Ramil. Nessa intenção, será explorada a construção identitária de Selbor visando ao pertencimento nos locais que atravessa antes de chegar à Satolep, bem como seus movimentos dentro da cidade ficcional. Inicialmente, busca-se investigar sua migrância pelas cidades do norte, em que o personagem é um deslocado; em seguida, faz-se um estudo sobre o retorno do protagonista à cidade de origem no encalço de sua identidade. Para tanto, serão utilizados alguns teóricos como Pierre Ouellet, Janet Paterson, Julia Kristeva e Zygmunt Bauman.This work intents to analyze the trajectory of the character Selbor, protagonist of the Novel Satolep, from the author Vitor Ramil. With this intention, it will be explored the identity construction of Selbor aiming the sense of belonging in the places he pass before returning to Satolep, such as his movements inside the fictional city. Firstly, it is sought to investigate its migration by the cities of the north, in which the personage is a displaced person; afterward, a study is made on the return of the protagonist to the city of origin in the pursuit of his identity. To do so, we will use some theories such as Pierre Ouellet, Janet Paterson, Julia Kristeva and Zygmunt Bauman
Paguristes candelae Matos-Pita & Ramil, 2015, n. sp.
No full textPaguristes candelae n. sp. (Fig. 7–12) Material examined. Holotype: Stn. MU 140 (17 ° 39 ' 25 "N, 16 ° 38 ' 11 "W to 17 ° 42 ' 28 "N, 16 ° 38 '00"W), 376–377 m, 4 November 2008 (MNCN 20.04 / 9822), male, sl 9.54 mm, entire, part of the anterior right branchiostegite is missing, inhabiting a shell of Euthriostoma saharicum (Locard, 1897) attached with two specimens of an unidentified actinia. Paratypes: Stn. MUBV 18 (18 ° 28 ' 27 " N, 16 ° 42 ' 43 "W to 18 ° 28 ' 14 "N, 16 ° 42 ' 40 "W), 559–574 m, 11 December 2009 (MNCN 20.04 / 9823), 1 female, sl 5.10 mm, entire, lacking right pereiopod 4 dactylus and half propodus, without a shell; Stn MUDR 12 (19 ° 52 ' 38 "N, 17 ° 22 ' 23 "W), 485 m, 26 November 2010 (UVIGOBA 3 –02500), 1 female, sl 3.91 mm, entire, right P 3 and left P 2 detached, inhabiting a shell of Nassarius wolffi (Knudsen, 1956) (specimen added posteriorly, collected in the same area with a rock dredge). Description. Shield slightly longer than broad (1.04 times); anterolateral margins weakly sloping, one spine on anterolateral angle; anterior margin between rostrum and lateral projections concave; posterior margin truncated; dorsal surface rugose with low, irregular elevations on gastric region on either side of the midline and scattered tufts of long simple setae laterally (Fig. 8 A). Rostrum short, broadly triangular, with a terminal thin spine weakly curved ventrally, falling short in relation to the lateral projections; dorsal surface with a median elevation; lateral margins smooth and furnished with long plumose setae. Lateral projections subtriangular, with small and weakly developed marginal blunt spines on the left, not developed on the right (Fig. 8 B). Branchiostegites strongly calcified (Figs. 7 A, B), anterior margin smooth and furnished with long plumose setae on the left (right is missing); covering 13 pairs of biserial phyllobranchiae; pleurobranchiae above pereiopods 2–4. Ocular peduncles moderately slender (5.85 times longer than the width of cornea), about 0.54 times as long as shield, cylindrical, weakly inflated basally, cornea not dilated; both dorsal surfaces with dorsolateral tufts of long simple setae proximally and a longitudinal dorsomesial row of long simple setae (Fig. 8 B). Ocular acicles subtriangular, ending in a simple spine on the left and with an additional small spine behind the main one (Fig. 8 B); mesial and lateral margins unarmed; mesial margin furnished with short plumose setae; separated by 0.3 basal width of one acicle. Antennular peduncles, when fully extended, overreach distal margins of corneas by 0.8 length of ultimate segment. Ultimate segment with a dorsal longitudinal row of scattered long, simple setae; penultimate segment without setae. Basal segment with spine on dorsolateral margin of statocyst lobe, laterodistal margin with spinule, ventromesial distal angle produced, ending in acute spine. Antennal peduncles, when fully extended, overreach cornea by 1 / 3 the length of the fifth segment; fifth segment unarmed; fourth segment with a small spine at dorsodistal margin; third segment with ventromesial distal angle strongly produced, ending in a strong spine; second segment with dorsolateral distal margin produced, ending in three spines almost concealed by a tuft of long simple setae, lateral margin with a small spine on the left antenna and smooth on the right one, dorsomesial angle with two distal spines, mesial row of short plumose setae; first segment with a very small laterodistal marginal spine on the left antenna, unarmed on the right one. Antennal acicles moderately long, slightly falling short of the distal margin of the ultimate peduncular segment, with numerous long simple setae; ending in a strong bifid spine; inflated basally; mesial margin with eight (left) or seven (right) strong spines, lateral margin armed distally with two (right) or three (left) strong spines (Fig. 8 B). Antennal flagella three times the length of the shield, slightly exceeding the tips of chelipeds, composed of about 50 articles, each with simple setae on their distal margin; setae up to six articles long. Third maxilliped ischium with well-developed crista dentata composed of moderately sized corneous teeth, without accessory tooth, ventrodistal margin and dorsolateral corner with one spine; merus with three moderate and separated ventral spines, one spine on dorsodistal margin; carpus with one spine on dorsodistal margin; dactylus shorter than propodus (Fig. 10 D). Chelipeds subequal and with similar armature, left slightly large and longer than right (Fig. 7 C). Dactylus 1.5 times longer than palm, cutting edge with a row of small calcareous teeth in proximal 0.7 and a row of strong corneous teeth in distal 0.3, ending in a strong corneous claw, overlapped by a fixed finger; dorsomesial margin with an irregular row of moderately small, conical, corneous-tipped spines, decreasing in size distally, dorsal surface with scattered tufts of long stiff setae and a couple of spinulose tubercles proximally; mesial face protuberant ventrally (Fig. 10 B) with scattered tufts of short setae and corneous, or only corneous-tipped, spinules; ventral surface unarmed, with tufts of stiff setae. Palm slightly shorter than carpus (Fig. 10 A); dorsomesial margin with three strong, corneous-tipped spines, dorsal surface convex, without delineation of dorsolateral margin, with several irregular rows of moderately strong, corneous-tipped spines, decreasing in size on the fixed finger, and with a tuft of stiff setae; mesial surface with a couple of low protuberances distally, with tufts of long setae, mesiodistal margin unarmed; ventral surface well inflated, with row of spinulose tubercles with tufts of long setae along midline, extending onto the fixed finger, and few protuberances or tubercles laterally and mesially. Fixed finger not noticeably deflexed (Fig. 10 B); dorsal surface with irregular rows of moderately strong corneous-tipped spines, decreasing in size distally; lateral margin not clearly delineated; cutting edge with row of small calcareous teeth in proximal 0.7 and row of strong corneous teeth in distal 0.3, ending in a strong corneous claw; a narrow hiatus when the claw is closed. Carpus about 0.6 times as long as merus (Fig. 10 B); dorsomesial margin with an irregular row of four or five strong, conical, corneous-tipped spines, increasing in size distally; dorsal surface with single or double row of moderately strong, corneous-tipped spines at both sides of the midline and scattered tufts of long single setae; dorsodistal margin produced, with moderately small corneus-tipped spine laterally; dorsolateral margin not clearly delineated; mesial surface with tufts of setae along dorsal and distal margins; lateral surface with some scattered and moderately small tubercles, with tufts of setae; laterodistal margin with few small spines dorsally; ventral face unarmed. Merus moderately deep; dorsal surface with a row of small spinulose tubercles with tufts of long simple setae; dorsodistal margin weakly spinulose, with a spinulose transverse ridge running subdistally from lateral to mesial faces; mesial surface smooth; ventromesial margin with a row of moderately strong, corneoustipped spines and sparse simple setae; lateral surface with scattered small tubercles and few short setae (Fig. 10 B); ventral face unarmed and with a row of plumose setae distally following the ventrolateral margin; ventrolateral margin with small spine near distal corner. Ischium with a row of small spinulose tubercles, increasing in size distally, furnished with plumose setae on ventromesial margin, ventrolateral distal angle with a couple of small spines. Coxa unarmed. Second pereiopods overreaching chelipeds by about the total length of the dactylus (Figs. 7 A, 9 A). Dactylus about 0.6 times longer than propodus; weakly curved in lateral view, nearly straight or slightly twisted in dorsal view; ending in a strong, curved, corneous claw; each dorsal surface with a row of small to moderately small corneous-tipped spines, becoming smaller distally, partially obscured by numerous tufts of long setae; each mesial face with two rows of tufts of setae dorsally and ventrally (Fig. 10 C); lateral faces with two rows of sparse tufts of setae subdorsally and subventrally; each ventral margin with a row of about 30 small corneous spines anteriorly directed, increasing in size distally. Propodus distinctly longer than carpus; dorsal surfaces each with a more or less irregular row of strong, corneous-tipped spines mesially, less numerous on left pereiopod, partially obscured by tufts of long setae; dorsodistal margins with a spine; mesial surfaces with two entire rows of tufts of long setae dorsally and ventrally and one short row of scattered tufts of long setae on the proximal midline; lateral surfaces unarmed, each one with a row of tufts of long setae near the dorsal and ventral margins and also on the midline; ventral surfaces unarmed, each with an irregular row of tufts of long setae. Carpus dorsal surface with a row of strong, corneous-tipped spines mesially and tufts of long setae (Fig. 10 C), dorsodistal margin with a strong corneus-tipped spine; mesial surfaces smooth; lateral faces convex, each one with shallow longitudinal sulcus irregularly lined with scattered tufts of long simple setae, median scattered tufts of long simple setae and one row of lateroventral tufts of long simple setae; smooth ventral surfaces with a couple of tufts of short simple setae; ventrodistal margins with some long simple setae and a few short plumose setae. Merus strongly compressed laterally; each dorsal surface with a row of tufts of long simple setae; mesial and lateral surfaces smooth; each ventral surface with a mesial row of small spines or spinules and numerous long simple setae with some short plumose setae, ventrolateral angle furnished with two short plumose setae. Ischium dorsal surfaces with a row of spinules and some short plumose setae, dorsodistal margins with a short spine; ventral margins with a distal row of long plumose setae. Coxa unarmed other than with small spines on ventrolateral and ventromesial distal angles. Third pereiopods mostly similar to second in setation (Figs. 7 A, 9 A). Dactylus with a proximal single row of small corneous-tipped spines and small corneous spines distally on dorsomesial margin; each mesial surface with a single or a double row of small corneous spines ventral to midline (Fig. 10 C); each ventral surface with a row of about 30 small corneous spines anteriorly directed, flanked by two rows of tufts of long setae. Propodus unarmed. Carpus with a dorsal row of 2 or 3 spines proximally and a subdistal dorsal spine; mesial faces with one mediodistal tuft of setae (Fig. 10 C). Merus unarmed apart from a few spinules proximally on dorsal surfaces. Ischium with some barely noticeable spinules on dorsal surface and a very small subdistal spinous low tubercle. Coxa unarmed on dorsal and ventral margins. Fourth pereiopods setose on dorsal and ventral margins. Dactylus weakly curved, ending in a strong corneous claw, without preungal process (Fig. 10 E); dorsal surface unarmed; ventral surface with a lateral row extending to 0.7–0.8 length of ventral margin and composed of 6 or 7 corneous teeth. Propodal rasp formed by 5–6 rows of ovate scales (Fig. 10 E). Carpus and merus unarmed. Fifth pereiopods chelate, setose. Dactylus covered with ovate scales (Fig. 10 F). Propodus with a welldeveloped rasp (Fig. 10 F). Each coxa with a gonopore. Pleopods. First and second pleopods paired and modified (Figs. 11 A, 11 B). First pleopod robust, inferior lamella with the distal rounded margin furnished with 2–3 rows of hook-like spines (Fig. 11 C); external lobe with a curved tip and separated from the internal lobe by a wide rounded notch (Fig. 11 C); broad internal lobe with long setae distally (Figs. 11 A, 11 C). Second pleopod uniramous (Fig. 11 D). Third to fifth pleopods unpaired, exopods very well developed, endopods rudimentary. Abdominal tergites. Second and third abdominal tergites moderately calcified on their left (Fig. 7 B), with long plumose setae on the left margins; fourth abdominal tergite widely separated from the third tergite, with moderately long plumose setae. Uropods strongly asymmetrical (Fig. 9 D); each protopod with a few small corneous-tipped spines on its posteroventral margin. Telson with posterior lobes somewhat asymmetrical, left lobe larger than the right; broadly rounded; separated by a wide median cleft; terminal margins with short broad spines, 7 (left) and 6 (right) (Fig. 11 E); deep transverse indentations (as in Fig. 9 D); anterior lobes unarmed on their lateral margins. Females. Differences other than those attributed to sex: relative length of the antennal penduncle that falls short of distal cornea; absence of subterminal spine in the ocular acicles (Fig. 9 B); spines on ventrolateral and ventromesial distal angles on pereiopod 2, coxae almost inconspicuous; pereiopods 2 and 3 with the dactylus ventral margin furnished with fewer anteriorly directed corneus spines (about 20); pereiopod 4 with only five corneus teeth in the dactylus ventrolateral row; and telson with nine thinner marginal teeth on each lobe (Fig. 9 D). Females show paired gonopores (Fig. 12 A); first pleopods paired, uniramous; second to fifth pleopods unpaired, second to fourth with both rami well developed, exopods much longer than endopods and fifth pleopod shorter, with the exopod well developed and a vestigial endopod. Brood pouch moderately large, subtriangular, with smooth margins furnished with long plumose setae (Fig. 12 B). Etymology. Devoted to Candela, the daughter of the first author. Remarks. To date 18 species have been assigned to Paguristes in West Africa, seven of which were transferred to Areopaguristes (Rahayu 2005, present work) and one to Pseudopaguristes (present work). The type material of the other ten species must be checked in order to clarify their taxonomic status, as suggested by McLaughlin (2002) and Rahayu (2005). There are no indications of the gill number in the other ten Paguristes species in the literature, but P. candelae n. sp can be clearly differentiated by other features, including the multidentate ocular acicles (more than 3 spines) of Paguristes fagei Forest, 1952, Paguristes insularis Forest, 1966, Paguristes microphthalmus Forest, 1952, Paguristes oxyacanthus Forest, 1952 and Paguristes skoogi Odhner, 1923; the relative length of the rostrum, the antennal acicle and the antennal peduncle, as well as the morphology of chelipeds, and pereiopods 2 and 3 of the species Paguristes agulhasensis Forest, 1954 a, Paguristes barnardi Forest, 1954 a, Paguristes gamianus (H. Milne-Edwards, 1836), Paguristes macrotrichus Forest, 1954 a and Paguristes rubropictus A. Milne-Edwards & Bouvier, 1892. Moreover, the presence of two gonopods in females was only described for P. gamianus and P. rubropictus, although this detail is unknown for P. agulhasensis (only one male was ever reported) and for P. barnardi, P. macrotrichus and P. skoogi because this feature was never specified; in the other species, females have only one gonopore on left third pereiopod. Paguristes eremita (Linnaeus, 1767), Paguristes streaensis Pastore, 1984 and Paguristes syrtensis de Saint Laurent, 1971, also reported from E Atlantic and the Mediterranean Sea, have a rostrum that exceeds the lateral projections and granular chelipeds, whereas in Paguristes candelae n. sp. the rostrum falls short of the lateral projections and the chelipeds have strong corneus-tipped spines. We also checked the descriptions of the 31 species currently referred to as Paguristes sensu lato from the western Atlantic Ocean (A. Milne-Edwards 1880; A. Milne-Edwards & Bouvier 1893; Benedict 1901; Schmitt 1933; Forest 1954 b; Holthuis 1959; Provenzano 1965; McLaughlin & Provenzano Jr. 1974, 1975; Campos & Sánchez 1995; Sandberg, 1996; Manjón-Cabeza et al. 2002); none of them concurred with the above-mentioned combination of features observed in our specimen, related to the rostrum, antennal acicles, cheliped morphology and telson armature.Published as part of De Matos-Pita, Susana S. & Ramil, Fran, 2015, Hermit crabs (Decapoda: Crustacea) from deep Mauritanian waters (NW Africa) with the description of a new species, pp. 151-190 in Zootaxa 3926 (2) on pages 164-170, DOI: 10.11646/zootaxa.3926.2.1, http://zenodo.org/record/24219
Applying 2<sup>k</sup> Factorial Design to Study on Parameters Affecting Springback of Forming of Advanced High Strength Steel Sheets (AHSS)
No full textAdvanced high strength steels (AHSS) are widely used in the automotive industry due to their appropriate strength to weight ratio. This alloy has unique hardening behavior and variable unloading elastic modulus; however, the unavoidable obstacle of AHSS sheet metal forming is springback. The springback is a result of elastic recovery and residual stress. The aim of this study is to determine the proper process parameters enabling the reduction of the springback defects in AHSS forming process. This work was divided into two parts, regarding to the effects of numerical parameters and process parameter on forming AHSS. In this paper, a U-shape forming was used to examine the springback behaviors, such as springback angle, sidewall curl, and thickness, through an experiment. To achieve this purpose, 2k factorial statistical experimental design has been employed to investigate the parameters affecting the springback of forming in AHSS to find out the main effect in the springback reduction focusing on using as a guideline for die design. It showed that the blank holder force is the most influential parameter. The second is the punch radius. However, the blank holder force and punch radius is not simple to adjust in die design, the die radius becomes the important parameter to be used to reduce the springback angle.</jats:p
The impact of cable length on the mobility performance of a remotely operated underwater vehicle (ROV)
No full textThis study examines the impact of tether length on the mobility performance of a Remotely Operated Vehicle (ROV) in calm-water conditions. Field studies were executed at Laem Chabang Port, during which the ROV was utilized to navigate a 300-m trajectory while consistently documenting velocity and power usage. Results show that as the tether length increases, vehicle speed consistently decreases while power usage increases, indicating the effect of tether-induced hydrodynamic drag. Specifically, the velocity declined from 0.6706 m/s at the start to approximately 0.5500 m/s at 300 m, while power consumption rose from 0.7414 kW to around 0.778 kW. Linear regression was utilized to quantify these patterns, yielding two empirical models: V(x) = 0.6706−0.0003x and P(x) = 0.7414+(8 × 10−5)x, with x representing the tether length in meters. The models gave coefficients of determination of R2 = 0.5834 and R2 = 0.5965, respectively. This research presents one of the first empirical frameworks derived from in-field experimental trials to quantify performance degradation due to tether drag, thereby providing practical tools for energy budgeting and motion forecasting of stationary underwater vehicles in real-time operational planning. Unlike prior works relying mainly on simulations or analytical models, our study delivers regression-based predictive equations validated across different test sites. This contribution not only enhances operational readiness but also establishes a solid foundation for future investigations into nonlinear modeling and the development of adaptive control systems that incorporate tether dynamics to further improve predictive accuracy
Em uma esquina do sul: fragmentações e construções identitárias na música platina a partir da análise da obra de Vitor Ramil
No full textTendo como objeto de análise a obra do compositor e escritor gaúcho Vitor Ramil, a pesquisa busca apontar, a partir do conceito de construção de identidade e das perspectivas contemporâneas do multiculturalismo, a produção musical de Ramil como produto cultural representativo da geração dos anos 90. Identificamos nessa década o surgimento de alguns importantes movimentos musicais (organizados ou não). Dois desses movimentos são: o Mangue Beat, em Recife, liderado por Chico Science; e A estética do frio, no Rio Grande do Sul, liderado por Vitor Ramil. A estética do frio, assim como os demais movimentos musicais surgidos na década de 90, apresentam algumas propostas em comum, a saber: o interesse e o resgate pela memória da cultura local/regional; a necessidade de afirmação cultural e geográfica na produção musical; o resgate da produção musical local/regional com a qual se afiliavam; a busca e a tradução do passado cultural local/regional com os quais se sentiam conectados para a atualidade; a intencionalidade de colocar em contato propostas musicais e temporalidades diferentes. Nota-se, portanto, uma necessidade dessa geração em fortalecer seus laços locais/regionais e em conectar a tradição com o mundo contemporâneo. Essas necessidades de afirmação estão vinculadas especialmente a dois momentos históricos: o início da redemocratização do país na segunda metade dos anos 80; e o medo da homogeneização cultural representada pela maior entrada de produtos culturais massivos no período pós-ditadura, geralmente oriundo dos Estados Unidos. Lançado em 1993, A estética do frio (2004) é um ensaio reflexivo de Ramil, no qual o autor tenta reformular sua produção musical e sua inserção enquanto músico gaúcho dentro da MPB. Além disso, também busca analisar as relações de afiliação da música gaúcha com as músicas argentina e uruguaia, e os possíveis vínculos culturais entre os três paísesCoordenação de Aperfeiçoamento de Pessoal de Nível SuperiorAnalysing the work of Vitor Ramil, composer and writer from Rio Grande do Sul/Brazil, the research aims to identify, from the concept of identity construction and contemporary perspectives of multiculturalism, Ramil’s music production as a representative cultural product of the generation of the 90s. We identify in this decade the emergence of some important musical movements (organized or not). Both of these movements are: Mangue Beat, in Recife, led by Chico Science, and A estética do frio (The aesthetics of the cold), in Rio Grande do Sul, led by Vitor Ramil. A estética do frio (The aesthetics of the cold), as others musical movements that emerged in the 90s, have some proposals in common, namely: the interest and the rescue by the memory of local / regional culture; the need for cultural and geographical affirmation in music production; the rescue of local / regional musical production with which they were affiliated; the search and the translation of local / regional cultural past with which they felt connected to the present; the intention of establishing contacts between musical proposals and different times. Note, therefore, a need for this generation to strengthen their local / regional ties and connect the tradition with the contemporary world. Those needs of affirmation are linked especially to two historical moments: the beginning of Brazil’s democratization in the second half of the 80s; and the fear of cultural homogenization represented by a higher input of massive cultural products in the post-dictatorship period, usually coming from the United States. Released in 1993, A estética do frio (The aesthetics of the cold) is a Ramil’s reflective essay, in which the author tries to reshape his musical production and his role as a gaúcho (born in Rio Grande do Sul) musician within the Brazilian Popular Music (MPB). It also seeks to analyze the relations of affiliation with the Argentine and Uruguayan music, and possible cultural ties between the three countrie
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