30,204 research outputs found
Influência da flexibilidade de vigas de apoio no projeto de lajes maciças de concreto armado
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Civil, Florianópolis, 2013.Nesta pesquisa realizou-se um estudo numérico sobre a influência da flexibilidade de vigas de apoio na resposta estática e dinâmica de tabuleiros formados por lajes maciças e vigas de concreto armado, em regime elástico-linear. Na resposta estática, é realizada a avaliação da variação de momentos fletores, da área de aço, do detalhamento das armaduras e das flechas das lajes e vigas, em função da relação entre a flexibilidade da laje e da viga. A avaliação da resposta dinâmica é realizada em vibração livre não amortecida, pela qual se obtêm os modos de vibração e os valores das frequências naturais que são comparados com os limites da NBR 6118:2007. Para a análise integrada de pisos de concreto armado constituídos por lajes maciças apoiadas em vigas flexíveis, utilizaram-se o método numérico de Analogia de Grelha (AG) e o Método dos Elementos Finitos (MEF). O procedimento manual de cálculo de lajes, através de tabelas, é utilizado como um procedimento inicial para determinação de flechas e momentos fletores das lajes e também serve de base para a verificação dos modelos mais complexos. Os resultados desta pesquisa mostram que tanto a resposta estática, quanto a resposta dinâmica, do tabuleiro podem apresentar grande variação devido à alteração da relação entre rigidez à flexão das lajes e vigas de bordo. Abstract: In this research was realized a numerical study about influence of the flexibility of support beams in static and dynamic response of floors made of solid slabs and beams of reinforced concrete, in linear elastic regime. In static response is evaluated the variation of bending moments, area of steel, reinforcement detailing, and arrows of slabs and beams, depending on the relationship between the flexibility of the slab and beam. The evaluation of dynamic response is performed in free undamped vibration, which obtains the vibration modes and the values of natural frequencies, which are compared with the limits of NBR 6118:2007. For the integrated analysis of concrete floors, made of solid slabs supported on flexible beams, was used the numerical method of Analogy of plane Grids (AG) and the Finite Element Method (FEM). The manual procedure for calculating of slabs, through tables, is used as an initial procedure for determining arrows and bending moments of the slabs, and also provides the basis for the verification of models more complex. The research results show that both the static response as the dynamic response of the pavement, may show large variation due to the change in the relationship between bending stiffness of slabs and beams aboard
Anacanthorus circumspatulatus Santos Neto & Muriel-Cunha & Domingues 2019, sp. n.
No full textAnacanthorus circumspatulatus sp. n. (Figs. 26–28) Type-host: Erythrinus erythrinus (Bloch & Schneider), Erythrinidae. Site of infection: Gills. Type-locality: Igarapé Cururutuia—Caeté River, municipality of Bragança, Pará State, Brazil (1°4’44.55”S 46°44’18.54”W). Prevalence: 100% of one host examined. Mean intensity: 2 parasites per host infected. Other localities: Erythrinus erythrinus (Prevalence: 14% of seven hosts examined; Mean intensity: two parasites per host infected), Igarapé Maratininga—Moju River, Tailândia, Pará State (02º27’55.7”S 048º53’27.6”W). Specimens deposited: Holotype: CHIOC no. 40028 a. 1 paratype: CHIOC no. 40028 b. 2 vouchers: CHIOC nos. 40029 a–b. ZooBank registration: The Life Science Identifier (LSID) urn: lsid:zoobank.org:act: 37327D29-D790-4145- 8086-35543E65EE71. Etymology: The specific epithet derives from the Latin (circum = around + spatula = small blades), and refers to the ornament in the form of small blades distributed around the MCO. Comparative measurements: Table 6. Description: (Based on two specimens, mounted in Hoyer’s). Body fusiform 314 (283–346; n=2) long, excluding the haptor, 108 (100–116; n=2) wide at the height of germarium. Cephalic lobes developed; three groups of developed head organs; cephalic glands not observed. Two pairs of ocelli; anterior pair smaller than posterior pair; accessory granules ellipsoids, present or absent. Pharynx spherical 30 (28–32; n=2) long, 34 (32–36; n=2) wide. Esophagus not observed. Two intestinal caeca, confluent, posteriorly. Genital pore not observed. MCO 104 (101– 107; n=2) long, sclerotized, tubular, moderately long, with ornaments in the form of pointed and small interleaved blades distributed helically around the MCO, extending from the medial region to the distal region of the MCO (Fig. 26); accessory piece absent (Fig. 26). Seminal vesicle, prostatic reservoir, and gonads not observed. Peduncle short. Haptor sub-hexagonal 42 (30–54; n=2) long, 74 (56–93; n=2) wide. Similar 4A hooks 9 (n=1) long, with proximal portion dilated, comprising 1/3 of the hook length (Fig. 27). Seven pairs of similar hooks, blade slightly curved and robust 28 (n=1) long; shank with proximal dilatation comprising approximately ½ of its length; point short and curved; thumb slightly depressed and robust (Fig. 28). Hook filament delicate, extending proximally to the shank dilatation (Fig. 28). Remarks: Based on the MCO morphology, Anacanthorus circumspatulatus sp. n. is similar to Anacanthorus ataidei sp. n., since both species share the presence of a tubular and elongated MCO, with ornaments around it. However, they differ from each other by the hook morphology. Anacanthorus circumspatulatus sp. n. has the shank of hooks with a proximal dilatation comprising approximately ½ of the total shank length, a characteristic that is not observed in Anacanthorus ataidei sp. n., which has the shank of the hook without a proximal dilatation.Published as part of Santos Neto, João F., Muriel-Cunha, Janice & Domingues, Marcus V., 2019, New species of Anacanthorus (Dactylogyridae: Anacanthorinae) from the gills of Hoplerythrinus unitaeniatus and Erythrinus erythrinus (Characiformes: Erythrinidae) of the coastal drainage in the Eastern Amazon, Brazil, pp. 303-320 in Zootaxa 4615 (2) on pages 315-317, DOI: 10.11646/zootaxa.4615.2.4, http://zenodo.org/record/324470
Whittingtonocotyle Neto, Rodrigues & Domingues, 2015, n. gen.
No full textWhittingtonocotyle n. gen. Type species. Whittingtonocotyle caetei n. gen. n. sp. from Hoplerythrinus unitaeniatus (Agassiz). Site. Gills. Type locality. Caeté River (North/Northeast Atlantic Basin; Caeté, Gurupi, Turiaçu sub-basin), municipality of Augusto Corrêa, Pará State, Brazil (1 ° 3 ’ 58.21 ” S 46 ° 40 ’ 3.65 ”W) collected in October 2013. Other species. Whittingtonocotyle jeju n. gen. n. sp. Other localities. Whittingtonocotyle caetei n. gen. n. sp. from Hoplerythrinus unitaeniatus from Guamá River (North/Northeast Atlantic Basin; Meruu, Acará, Guamá sub-basin), municipality of Irituia, Pará State, Brazil (01° 51 ’ 59.8 ” S, 47 ° 24 ’ 17.2 ”W) collected in July 2014, Whittingtonocotyle jeju n. gen. n. sp. from Hoplerythrinus unitaeniatus from Caeté River, municipality of Augusto Corrêa, Pará State, Brazil (1 ° 3 ’ 58.21 ” S 46 ° 40 ’ 3.65 ”W) collected in October 2013; and Guamá River, municipality of Irituia, Pará State, Brazil (01° 51 ’ 59.8 ” S, 47 ° 24 ’ 17.2 ”W) collected in July 2014. Etymology. The genus name is in honor of the late Dr. Ian D. Whittington, the South Australian Museum, in recognition of his valuable work on the Monogenoidea. Dr. Whittington passed away prematurely on 26 th October, 2014, after a long battle with cancer. Diagnosis. Body divisible into cephalic region, trunk, haptor. Tegument thin, smooth. Cephalic region with terminal ventral cephalic lobe poorly developed or absent. Bilateral pair of head organs opening subterminal to tip of cephalic lobes; cephalic glands lateral or postero-lateral to pharynx. Eyes present (2 pairs); granules elongate. Mouth subterminal, midventral; pharynx muscular, glandular; oesophagus short. Intestinal caeca 2, confluent posteriorly to gonads, lacking diverticula. Genital pore mid-ventral near level of cecal bifurcation. Genital atrium muscular. Gonads tandem or testis post-germarial; testis dorsal to germarium. Vas deferens looping left intestinal cecum; seminal vesicle sigmoid, looping dorso-ventrally before entering into the male copulatory organ. One prostatic reservoir, saccate; separated into two or three zones; one or two terminal areas densely stained. Copulatory complex comprising male copulatory organ, accessory piece; male copulatory organ sclerotized, spiral, clockwise; accessory piece sclerotized, non-articulated with the male copulatory organ. Vagina single; vaginal aperture dextro-dorsal, marginal, opening anteriorly or at mid-level of the trunk; vaginal vestibule muscular; vaginal canal heavily sclerotized, sigmoid or coiled. Seminal receptacle present, anterior to germarium. Egg ovate with short filament. Vitellaria well developed, coextensive with caeca. Haptor armed with, 14 hooks (7 pairs) with ancyrocephaline distribution (Mizelle 1936). Pair of ventral and dorsal anchors; anchors without well-defined roots. Ventral and dorsal bar; dorsal bar with anteromedial process. Parasites of gills of erythrinid fishes. Remarks. Whittingtonocotyle n. gen. is characterized by species possessing: (1) male copulatory organ sclerotized, spiral, clockwise, non-articulated with accessory piece; (2) prostatic reservoir separated into two/three zones with one or two terminal areas densely stained with Gomori’s trichrome; (3) vaginal aperture dextrodorsal; (4) anchors without well-defined roots; and (5) dorsal bar with anteromedial protuberance. Whittingtonocotyle n. gen. resembles Unilatus Mizelle & Kritsky, 1967, by having species with a male copulatory organ spiral, corkscrew like, non-articulated with accessory piece. The new genus differs from Unilatus by lacking small bulb on the distal medial portion of the male copulatory organ, by having dorsal and ventral anchor/bar complexes (anchor/bar complexes in the dorsal area of the haptor in Unilatus), and by the vagina opening dorsally on the right side (ventral, medial in Unilatus).Published as part of Santos Neto, João F., Rodrigues, Allan R. O. & Domingues, Marcus V., 2015, Proposal of Whittingtonocotyle n. gen. (Dactylogyroidea: Dactylogyridae), with the description of two new species from the gills of Hoplerythrinus unitaeniatus (Characiformes: Erythrinidae) in Brazil, pp. 191-200 in Zootaxa 3937 (1) on pages 192-193, DOI: 10.11646/zootaxa.3937.1.10, http://zenodo.org/record/23409
Anacanthorus acrophallus Santos Neto & Muriel-Cunha & Domingues 2019, sp. n.
No full textAnacanthorus acrophallus sp. n. (Figs. 23–25) Type-host: Hoplerythrinus unitaeniatus (Spix & Agassiz), Erythrinidae. Site of infection: Gills. Type-locality: Igarapé Arinandeua—Guamá River, municipality of São Miguel do Guamá, State of Pará, Brazil (1°37’42.50”S 47°29’45.06”W). Prevalence: 66% of three hosts examined. Mean intensity: 1,5 parasites per host examined. Specimens deposited: Holotype: CHIOC no. 40024. 2 paratypes: CHIOC nos. 40025 a–b. ZooBank registration: The Life Science Identifier (LSID) urn: lsid:zoobank.org:act: DFCCF79B-0944-4AC9- A9DB-4391828B8C1B. Etymology: The specific epithet derives from the Greek (acro = point + phallus = penis) and refers to the MCO morphology, based on the presence of a pointed flap in its distal portion. Description: (Based on three specimens mounted in Hoyer’s). Body fusiform 468 (425–512; n=2) long, excluding the haptor, 117 (115–120; n=2) wide at the height of germarium. Four cephalic lobes developed; three groups of head organs; cephalic glands not observed. Two pairs of ocelli, posterior pair slightly bigger than the anterior pair; accessory granules not observed. Pharynx oval 45 (36–60; n=3) long; 34 (27–47; n=3) wide; oesophagus moderately elongated. Two intestinal caeca confluent and posterior to the gonads. Genital pore not observed. MCO 27 (26–29; n=3) long, 10 (9–11; n=3) wide, sclerotized and short, with a small pointed sinistral flap (ventral view) (Fig. 23); accessory piece absent (Fig. 23). Seminal vesicle, germarium, prostatic reservoir and testicles not observed. Uterus with anterior portion slightly sclerotized. Haptor 57 (50–65; n=3) long, 74 (47–95; n=3) wide. Peduncle short or elongated. Similar 4A hooks with portion posterior slightly dilated 14 (n=1) long (Fig. 24). Seven pairs of similar hooks 23 (22–24; n=3) long; blade relatively long and recurved, point short and curved, shank with proximal dilatation 6 (6–7; n=3) long, comprising 1/3 of the total shank length, thumb robust and depressed (Fig. 25). Hook filament delicate, extending until the half of the shank, proximal to the dilatation (Fig. 25). Remarks: Anacanthorus acrophallus sp. n. is similar to Anacanthorus scyphophallus sp. n. and A. brevicirrus due to the presence of a short and tubular MCO. However, Anacanthorus acrophallus sp. n. differs from Anacanthorus scyphophallus sp. n. mainly by the hook morphology since Anacanthorus acrophallus sp. n. has hooks with shank showing a proximal and robust dilatation, comprising 1/3 of the shank length, and a short, extended and slightly depressed thumb. On the other hand, Anacanthorus scyphophallus sp. n. has hooks shank with shank showing a proximal dilatation comprising ½ of the shank length, and a rounded and short thumb. Anacanthorus brevicirrus differs from Anacanthorus acrophallus sp. n. also by the hook morphology since it has a small bulb with a translucid spot in the proximal portion of the shank, which is not found in Anacanthorus acrophallus sp. n.Published as part of Santos Neto, João F., Muriel-Cunha, Janice & Domingues, Marcus V., 2019, New species of Anacanthorus (Dactylogyridae: Anacanthorinae) from the gills of Hoplerythrinus unitaeniatus and Erythrinus erythrinus (Characiformes: Erythrinidae) of the coastal drainage in the Eastern Amazon, Brazil, pp. 303-320 in Zootaxa 4615 (2) on page 315, DOI: 10.11646/zootaxa.4615.2.4, http://zenodo.org/record/324470
Anacanthorus siphonocommus Santos Neto & Muriel-Cunha & Domingues 2019, sp. n.
No full textAnacanthorus siphonocommus sp. n. (Figs. 8–11) Type-host: Hoplerythrinus unitaeniatus (Spix & Agassiz), Erythrinidae. Site of infection: Gills. Type-locality: Igarapé Cururutuia—Caeté River, municipality of Bragança, State of Pará, Brazil (1°4’44.55”S 46°44’18.54”W). Other localities: Hoplerythrinus unitaeniatus (Prevalence: 100% of four hosts examined; Mean intensity: 1,5 parasites per host infected), Igarapé Arinandeua—Guamá River, municipality of São Miguel do Guamá, Pará State (1°37’42.50”S 47°29’45.06”W). Prevalence: 100% of one host examined. Mean intensity: 7 parasites per host infected. Specimens deposited: Holotype: CHIOC no. 40038 a. 3 paratypes: CHIOC nos. 40038 b–d. 9 vouchers: CHIOC nos. 40039 a–b; INPA no. 805; MPEG nos. 159–161. ZooBank registration: The Life Science Identifier (LSID) urn: lsid:zoobank.org:act: F348B068-1E19-4729- 94A3-18EFBAB15872. Etymology: The specific epithet derives from the Greek (siphono = tube + commus = ornament) and refers to the MCO morphology, tubular with ornaments, observed in the new species. Comparative measurements: Table 2. *Type locality / S.M.G = São Miguel do Guamá Description: (Based on seven specimens, four mounted in Gomori trichrome, three mounted in Hoyer’s). Body fusiform 427 (301–597; n=5) long, elongated, excluding the haptor, 125 (97–171; n=6) wide at the height of germarium (Fig. 8). Four cephalic lobes moderately developed; four groups of head organs; cephalic glands not observed (Fig. 8). Two pairs of ocelli, anterior pair smaller than posterior pair; posterior pair of ocelli more distant than the anterior pair; accessory granules present, little scattered in the cephalic area (Fig. 8). Pharynx oval 34 (30–38; n=3) long, 26 (20–33; n=3) wide; short esophagus (Fig. 8). Two intestinal caeca confluent and posterior to the gonads (Fig. 8). Genital pore not observed. MCO 86 (67–98; n=7) long, sclerotized, tubular, elongated, having a dilatation in the medial portion with aculeiform ornaments in the distal region (Fig. 11); accessory piece absent (Fig. 11). Seminal vesicle sigmoid. Uterus with sclerotized distal region. Gonads overlapping, germarium fusiform 67 (60–75; n=2) long, 27 (22–32; n=2) wide; testis elongated 42 (33–59; n=4) long, 28 (20–31; n=4) wide, dorsal to germarium (Fig. 8). Prostatic reservoir not observed. Peduncle long. Haptor sub-hexagonal 61 (51–93; n=5) long, 88 (64–108; n=4) wide (Fig. 8). Similar 4A hooks 14 (n=1) long (Fig. 10). Seven pairs of similar hooks 41 (39–43; n=2) long; blade robust and slightly curved; shank elongated with proximal dilatation comprising more than ½ of the shank length; proximal shank dilatation 21 (20–22; n=2) long; short and softly curved point; thumb developed and rounded (Fig. 9). Hook filament delicate, extending until near the shank dilatation (Fig. 9). Remarks: Anacanthorus siphonocommus sp. n. differs from the remaining congeneric species mainly based on the MCO morphology, due to the presence of dilatation in the medial portion and aculeiform ornaments in the distal region of the MCO; Anacanthorus siphonocommus sp. n. also has hooks with proximal dilatation in the shank, comprising more than ½ of the shank length.Published as part of Santos Neto, João F., Muriel-Cunha, Janice & Domingues, Marcus V., 2019, New species of Anacanthorus (Dactylogyridae: Anacanthorinae) from the gills of Hoplerythrinus unitaeniatus and Erythrinus erythrinus (Characiformes: Erythrinidae) of the coastal drainage in the Eastern Amazon, Brazil, pp. 303-320 in Zootaxa 4615 (2) on pages 306-308, DOI: 10.11646/zootaxa.4615.2.4, http://zenodo.org/record/324470
Getting Started as a Medical Teacher in Times of Change
No full textMedical school teaching is a skill that is very often learned on the job. The faculty comprised of researchers and clinicians are expert in many biomedical disciplines, but familiarity with learning theories and pedagogy are usually not included in their knowledge and skill sets. The pressure to see patients and acquire extramural funding leaves little time for faculty to learn how to teach. When coupled with the natural attrition of senior faculty it is necessary to start junior faculty on the correct path to being effective medical educators who are capable of lecturing and facilitating. Institutions cannot afford to have medical educators learn through trial and error. The standards set by the Liaison Committee on Medical Education (LCME) are also creating an urgency to produce competent teachers as quickly as possible. Novice teachers need to be able to use these standards to align their teaching with goals, objectives and the appropriate pedagogy. This article is designed to be a self-directed guide describing some essentials that a newly hired faculty member can quickly use to get started. An institutional faculty development program can then serve to build upon and enrich the experience for the new faculty member.This is the authors' accepted manuscript of the article. The final publication is available at Springer via http://dx.doi.org/doi:10.1007/s40670-014-0098-y.Peer reviewe
Whittingtonocotyle caetei Neto, Rodrigues & Domingues, 2015, n. sp.
No full textWhittingtonocotyle caetei n. sp. (Figs. 1–9) Type host. Hoplerythrinus unitaeniatus Site. Gills Type locality. Caeté River, municipality of Augusto Corrêa, Pará State, Brazil (1 ° 3 ’ 58.21 ” S 46 ° 40 ’ 3.65 ”W) collected in October 2013. Other records. Guamá River, municipality of Irituia, Pará State, Brazil (01° 51 ’ 59.8 ” S, 47 ° 24 ’ 17.2 ”W) collected in July 2014. Prevalence. 66 % of 3 hosts examined. Mean intensity. 13 parasites per infected host. Specimens deposited. Holotype, CHIOC 38012 a; 5 paratypes, CHIOC 38012 b–d, INPA 657, MPEG 00038; 12 vouchers, CHIOC 38013 a–f, INPA 658, MPEG 00039–00041. Etymology. The specific name is derived from the type locality. Comparative measurements. Table 1. Description (based on 6 specimens; 4 mounted in Gomori’s trichrome, 2 mounted in Hoyer’ medium): Body fusiform. Cephalic margin tapered; cephalic lobes poorly developed, 2 pairs; 4–5 pairs of head organs with rodshaped secretion; cephalic glands not observed. Eyes 4, posterior pair slightly larger and farther apart than anterior pair; accessory granules distributed in cephalic and anterior trunk regions. Pharynx spherical to subovate. Male copulatory organ with approximately 29 rings (Fig. 2). Accessory piece, a variable sheath, enclosing some distal rings of MCO. Testis spherical; vas deferens conspicuous; seminal vesicle fusiform; prostatic reservoir large, bacilliform separated into two zones with one terminal area densely stained. Germarium fusiform; oviduct, ootype, Mehlis’ glands, uterus not observed. Vagina comprising vaginal vestibule with soft tissue, vaginal canal heavily sclerotized, coiled, dilated in the distal portion before entering into the seminal receptacle. Seminal receptacle spherical. Peduncle short; pair of haptor glands starting at level of peduncle with long narrow ducts ending at level of the anchor/bar complexes (Fig. 1). Haptor subhexagonal. Anchors dissimilar, with poorly developed roots. Ventral anchor (Fig. 8) with superficial root short, tapered, deep root truncate, broad base, evenly curved shaft, point. Dorsal anchor (Fig. 9) with superficial root depressed, deep root short, evenly curved shaft, point. Ventral bar, broadly V-shaped, ends enlarged. Dorsal bar (Fig. 4), broadly V-shaped, with elongate anteromedial process, ½ dorsal bar length. Hooks similar (Figs. 6–7); each with delicate point and shaft, slightly depressed thumb, elongate straight shank; FH loop ½ shank length; hook pair 1 smaller than hook pairs 2–7. Remarks. Whittingtonocotyle caetei n. gen. n. sp. is the type species of the genus. The new species is characterized by having: (1) ventral anchor with deep root truncate; (2) prostatic reservoir separated into two zones with one terminal area densely stained; and (3) vaginal canal heavily sclerotized, coiled and dilate distally. * Type locality; **Dorsal bar length measurement at level of anteromedial process.Published as part of Santos Neto, João F., Rodrigues, Allan R. O. & Domingues, Marcus V., 2015, Proposal of Whittingtonocotyle n. gen. (Dactylogyroidea: Dactylogyridae), with the description of two new species from the gills of Hoplerythrinus unitaeniatus (Characiformes: Erythrinidae) in Brazil, pp. 191-200 in Zootaxa 3937 (1) on pages 193-194, DOI: 10.11646/zootaxa.3937.1.10, http://zenodo.org/record/23409
Darwinoplectanum figueiredoi Domingues, Diamanka & Pariselle, 2011, n. sp.
No full textDarwinoplectanum figueiredoi n. sp. (Figs. 17–25) Type host. Eucinostomus argenteus Baird & Girard. Site. Gills. Type locality. Municipality of Pontal do Paraná, State of Paraná, Brazil (25 ° 35 ’ 28.27 ’’S, 48 ° 21 ’ 10.70 ’’W) on 16 July 2001. Specimens studied. Holotype, CHIOC 37545 a; 14 paratypes, CHIOC 37545 b–f, INPA 593 a–c, MPEG 000016–000019, USNPC 104825. Etymology. This species is named for Dr. José Lima de Figueiredo, Museu de Zoologia da Universidade de São Paulo (MZUSP), São Paulo, São Paulo, Brazil in recognition of his research on taxonomy and systematic of marine fishes from Brazil. Description (based on 12 adult specimens): Body slender, fusiform, total length excluding haptor 386 (350– 450; n = 7) long, 73 (60–80; n = 7) wide at the level of germarium. Tegument smooth or scaled; scales plate-like with round anterior margins, lightly sclerotised, directed anteriorly, not easily observed in preserved specimens. Cephalic margin tapered; poorly developed terminal lobes; three bilateral pairs of head organs with rod-shaped secretion; cephalic glands not observed. Eyes 4, equidistant; posterior pair larger than anterior pair; eye granules ovate, elongate, numerous accessory granules at cephalic region (Fig. 17). Pharynx ovate to subspherical, 34 (28– 38; n = 6) in diameter; oesophagus short; intestinal caeca, broadly curved. Genital pore opening anterior to copulatory complex. Male copulatory organ slightly straight or arcuate originating from ring-like sclerotised base, marginal flap originating mid-length, 53 (50–55; n = 7) long (figs. 18–19). Accessory piece comprising variable sheath involving male copulatory organ, articulation process attached to base of male copulatory organ; expanded distal portion, 40 (39–42; n = 7) (figs. 18–19). Testis spherical to subspherical. Germarium tubular, elongate, unbranched, distal end transversal or diagonal to body, 40 long; oötype, Mehlis’ glands not observed; vaginal aperture marginal; vaginal atrium funnel-shape, slightly muscular, narrowing to short descendent tube; seminal receptacle not observed. Vitellarium extending throughout trunk, absent in regions of major reproductive organs. Egg not observed. Peduncle short to elongate. Haptor bilaterally lobed, 49 (38–68; n = 6) long, 130 (93–163; n = 6) wide (Fig. 17). Squamodiscs similar, subcircular to subtrapezoidal, 18 (n = 4) concentric rows of dumbbell-shaped rodlets becoming progressively more delicate in posterior row, difficult to observe in preserved specimens, 64 (63–68; n = 5) long, 73 (68–75; n = 4) wide. Ventral anchor with elongate roots (deep root longest), straight shaft and recurved point; point reaching level of tip of superficial root, outer 31 (28–32; n = 6) long, inner 18 (16–20; n = 6), base 8 (7–8; n = 6). Dorsal anchor with elongate deep root, inconspicuous superficial root, straight shaft and recurved short point, outer 28 (24–30; n = 6), inner 17 (14–18; n = 6), base 5 (4–6; n = 6). Ventral bar, elongate, with delicate tapered ends, 12 (10–14; n = 5) long, 128 (123–134; n = 5) wide. Paired dorsal bar, spatulate, 14 (13–15; n = 5) long, 76 (70–80; n = 4) long. Hooks similar with protruding thumb with slightly depressed tip, delicate slightly curved point, slender shank, 10 (9–10; n = 22) long; hook pairs 1–5, ventral, hook pairs 6–7, dorsal; hook pair 1 nearly to ventral bar end; hook pair 5 at level of distal ventral anchor shaft, others sub-marginal in lateral haptoral lobes; filamentous hook loop not observed. Remarks. Darwinoplectanum figueiredoi n. gen. n. sp. is the type species of the genus. It can be distinguished from its congeners by the position of the genital pore (i.e., anterior the copulatory complex) and the morphology of the copulatory complex. Also, the male copulatory complex of D. figueiredoi is larger than that of its congeners (male copulatory organ: 53 vs. 23 in D. pillitae n. gen. n. sp., and 28 in D. amphiatlanticus n. gen. n. sp.; accessory piece: 40 vs. 20 in D. pillitae n. gen. n. sp., and 26 in D. amphiatlanticus n. gen. n. sp.).Published as part of Domingues, Marcus V., Diamanka, Arfang & Pariselle, Antoine, 2011, Monogenoids (Diplectanidae, Polyonchoinea) from the gills of mojarras (Perciformes, Gerreidae) with the resurrection of Neodiplectanum Mizelle & Blatz, 1941 and the proposal of Darwinoplectanum n. gen., pp. 1-19 in Zootaxa 3010 on pages 9-11, DOI: 10.5281/zenodo.20673
Sous-facteurs de L(F∞) d'indice 4cos2π/n,n≥3
No full textLet Q be a factor of type II1, λ a number in the Jones discrete series {4cosπ/m:m≥3}, and {ei} the Jones projections associated with λ. Denote by A2n and A1n the finite-dimensional von Neumann algebras generated, respectively, by {1,e2,⋯,en} and {1,e1,⋯,en}, with the corresponding traces. The author shows that, for n sufficiently large, the index of the inclusion An=(Q⊗A2n)∗A2nA1n⊂(Q⊗A2n+1)∗A2n+1A1n+1=An+1 is equal to λ (here ∗ denotes the reduced, amalgamated free product of the algebras in question). Using the random matrix model of Voiculescu, he proves that if Q is the von Neumann algebra L(F∞) of the free group with infinitely many generators, then An is isomorphic to L(F∞).
The two facts together imply the existence, for any λ in the Jones discrete series, of an irreducible subfactor of L(F∞) of index λ. This constitutes the first example of a nonhyperfinite, non-Γ II1 factor such that its Jones invariant is fully computable (the existence of nonirreducible subfactors of L(F∞) for any index ≥4 is a simple consequence of known results)
Contribuições à análise de lajes nervuradas por analogia de grelha
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Civil.Este trabalho aborda aspectos da análise elástico-linear de lajes nervuradas de concreto armado através do modelo de analogia de grelha, o qual apresenta algumas vantagens em relação a outros métodos numéricos. São abordados alguns parâmetros que podem influenciar os resultados das análises, dando ênfase ao estudo do coeficiente de rigidez à torção, no modelo de analogia de grelha, e ao espaçamento entre nervuras da laje nervurada. Os resultados obtidos pelo modelo de analogia de grelha são comparados com os resultados obtidos calculando a laje nervurada como placa pela teoria da elasticidade, conforme permite a NBR-6118/78, e com o modelo tridimensional em elementos finitos. São apresentados exemplos de lajes quadradas e retangulares, com diferentes espaçamentos entre nervuras e diversas condições de apoio, inclusive considerações das lajes apoiadas em bordos indeslocáveis ou em vigas
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