49,628 research outputs found
Robinione overstreeti Boyko & Williams & Shields 2017
No full textRobinione overstreeti (Adkison & Heard, 1995) n. comb. Figs 9, 10 Pseudioniinae [sic] sp. A. Rakocinski et al., 1993: 102 (list). Pseudione overstreeti Adkison & Heard, 1995: 105 –109, figs. 1, 2 (type locality: west end of Horn Island, Mississippi, U.S. A, infesting Callichirus islagrande (Schmitt, 1935)).— Rakocinski et al., 1996: 351 (list).— Camp, 1998: 134 (list).— Schotte et al., 2009: 980 (list).— Vogt, 2016: 1409, 1410 (mention), fig. 7A (color photo of male and female). Material examined. United States: Immature female (5.5 mm), ex right branchial chamber of female Callichirus islagrande (10.9 mm CL), Gulf Beach, Isle Dernière, Louisiana, coll. R. B. Griffis & T. Zimmerman, 27 Jul 1993 (ULLZ 10206); immature female (5.5 mm, on SEM stub, USNM 1459847 ex ULLZ 10205), mature male (3.0 mm), ex right branchial chamber of female C. islagrande (8.0 mm CL), mid-intertidal pool and low intertidal, bay side, Isle Dernièrs, Louisiana, coll. R. B. Griffis, D. L. Felder & T. McTigue, 19 Oct 1993 (ULLZ 10205); ovigerous female (11.0 mm), mature male (4.0 mm), ex left branchial chamber of female C. islagrande (11.4 mm CL), Gulf side, Isle Dernièrs, Louisiana, coll. D. L. Felder, P. Klerks & D. Griffis, 22 Jan 1995 (ULLZ 10207); immature female (11.0 mm), mature male (4.0 mm), ex left branchial chamber of female C. islagrande (10.8 mm CL), Gulf side of beach, Isla Dernièrs, Louisiana, coll. R. B. Griffis & T. Zimmerman, 27 Jul 1993 (ULLZ 10199); female (11.0 mm), ex left branchial chamber female C. islagrande (10.1 mm CL), Gulf side of beach, Isle Dernièrs, Louisiana, coll. R. B. Griffis, D. L. Felder & T. McTigue, 19 Oct 1993 (ULLZ 10209); immature female (3.0 mm), ex left branchial chamber of immature C. islagrande (5.0 mm CL), immature female (3.7 mm), mature male (2.3 mm, on SEM stub, USNM 1459848 ex ULLZ 10198), ex left branchial chamber of immature C. islagrande (5.0 mm CL), immature female (3.5 mm), mature male (2.0 mm), ex right branchial chamber of female C. islagrande (6.5 mm CL), immature female (3.5 mm), mature male (2.2 mm, on SEM stub, USNM 145 9848 ex ULLZ 10198), ex right branchial chamber of female C. islagrande (5.0 mm CL), access road #3, near Fish Pass, low tide, morning, Mustang Island, Texas, coll. D. L. Felder & L. Bilodeau, 1 Mar 2000 (ULLZ 10198); ovigerous female (12.0 mm), mature male (4.5 mm), ex C. islagrande (host not in vial with parasites), Gulf side, Isle Dernièrs, Louisiana, coll. D. L. Felder & R. B. Griffis, 24 Jul 1992 (ULLZ 10210); ovigerous female (11.0 mm), mature male (4.5 mm), ex left branchial chamber of female C. santarosaensis Sakai and Türkay, 2012 (11.4 mm CL), bay side, Isle Dernièrs, Louisiana, coll. A. Christian, D. Badgwill, R. B. Griffis & I. A. Griffis, 22 Jan 1993 (ULLZ 10204). Distribution. Gulf of Mexico from west coast of Florida to Texas, U.S.A., and Tabasco, Mexico. Hosts. Callichirus islagrande (Schmitt, 1935) (type species) and C. santarosaensis Sakai & Türkay, 2012. Remarks. The present material of R. overstreeti n. comb. (Figs. 9, 10) matches that of Adkison & Heard (1995), who provided a detailed description of the species. Although they did not show the ventral view of the male, Adkison & Heard (1995) indicated that the pleopods were “vestigial or absent, represented by low mounds mesal to lateral processes of pleomeres” as we found in our samples (Fig. 10D). The male pleomeres documented in Adkison & Heard (1995; Fig. 2A) are slightly more elongate and acute than in the present specimens, but this variation is typical for pleopodal morphology in bopyrids. Each male pereopod of R. overstreeti n. comb. has a recurved dactylus, the distal end of which touches the base of the propodus and is surrounded by a low ridge of tooth-like projections (Fig. 10B, C). The female R. overstreeti n. comb. examined with SEM (Fig. 9) is not fully mature, thus has reduced oostegites and, proportionally, somewhat longer and thinner pleopods and uropods than the holotype (Adkison & Heard, 1995; Fig. 1B). Female and male antennae (Figs. 9B, 10B) have the same numbers of articles as in the original description (3 and 4 for females; 3 and 5 for males). Female R. overstreeti n. comb. have pereopods with elongate carpi and a large irregular, infolded mass on the dorsal surface of each of the bases (Fig. 9C, D), all pereopodal segments covered with scales (Fig. 9C–F). Felder & Dworschak (2015) discussed in detail the nomenclatural issues surrounding the name C. santarosaensis, which is now used for Gulf of Mexico populations of the Callichirus species formerly called C. major (Say, 1818), but which is distinct from that Atlantic coastal species. This is the first record of “ Pseudione ” overstreeti from C. santarosaensis (either under that name or as C. major). Adkison & Heard (1995) examined several hundred C. santarosaensis (as C. major) and found no bopyrids on them; it is not clear where their specimens were collected from, but based on the material examined list for P. overstreeti, they probably came from Alabama or Mississippi.Published as part of Boyko, Christopher B., Williams, Jason D. & Shields, Jeffrey D., 2017, Parasites (Isopoda: Epicaridea and Nematoda) from ghost and mud shrimp (Decapoda: Axiidea and Gebiidea) with descriptions of a new genus and a new species of bopyrid isopod and clarification of Pseudione Kossmann, 1881, pp. 251-301 in Zootaxa 4365 (3) on pages 279-282, DOI: 10.11646/zootaxa.4365.3.1, http://zenodo.org/record/111798
Representative bopyroid and cryptoniscoid isopods, a selection of body forms.
No full text<p>A) <i>Pseudione quasimodo</i> Boyko & Williams, 2004 (Bopyridae: Pseudioninae), female dorsal view; B) <i>Pseudione quasimodo</i>, male dorsal view; C) <i>Dactylokepon semipennatus</i> Bourdon, 1983 (Bopyridae: Ioninae), female dorsal view; D) <i>Minimathelges nanus</i> Boyko & Williams, 2003 (Bopyridae: Athelginae), female dorsal view; E) <i>Minimathelges nanus</i>, male dorsal view; F) <i>Hemiarthrus surculus</i> Boyko & Williams, 2004 (Bopyridae: Hemiarthrinae), female dorsal view; G) <i>Entophilus mirabiledictu</i> Markham & Dworschak, 2005 (Bopyridae: Entophilinae), female dorsal view; H) <i>Entophilus mirabiledictu</i>, male dorsal view; I, <i>Heterophryxus appendiculatus</i> G. O. Sars, 1885 (Dajidae), female dorsal view, with male attached; J) <i>Heterophryxus appendiculatus</i>, male dorsal view; K) <i>Paguritherium alatum</i> Reinhard, 1945 (Entoniscidae), female lateral view, with enclosing sheath removed. L) <i>Paguritherium alatum</i>, male lateral view; M) <i>Cabirops bombyliophila</i> Williams & Boyko, 2004 (Cabiropidae), female lateral view; N) <i>Cabirops bombyliophila</i>, male dorsal view; O) <i>Crinoniscus politosummus</i> Hosie, 2008 (Crinoniscidae), female lateral view; P) <i>Danalia curvata</i> (Fraisse, 1878) (Cryptoniscidae), female lateral view; Q) <i>Hemioniscus balani</i> Buchholz, 1866 (Hemioniscidae), juvenile female dorsal view; R) <i>Hemioniscus pagurophilus</i> Williams & Boyko, 2006 (Hemioniscidae), male dorsal view. (A, B, F, from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035350#pone.0035350-Boyko4" target="_blank">[83]</a>; C from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035350#pone.0035350-Bourdon2" target="_blank">[84]</a>; D, E from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035350#pone.0035350-Boyko5" target="_blank">[85]</a>; G, H from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035350#pone.0035350-Markham2" target="_blank">[37]</a>; I, J from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035350#pone.0035350-Shimomura1" target="_blank">[86]</a>; K, L from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035350#pone.0035350-Reinhard2" target="_blank">[87]</a>; M, N from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035350#pone.0035350-Williams5" target="_blank">[88]</a>; O from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035350#pone.0035350-Hosie1" target="_blank">[21]</a>; P, Q from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035350#pone.0035350-Trilles1" target="_blank">[8]</a>; R from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035350#pone.0035350-Williams1" target="_blank">[28]</a>). Scale bars: A, C, F = 1 mm; B, O, M = 0.5 mm; D, H, R = 0.25 mm; E = 0.075 mm; G = 2 mm; I, J = 0.3 mm; N = 0.15 mm; rest not to scale.</p
Albunea speciosa Dana 1852
No full text<i>Albunea speciosa</i> Dana, 1852 <p> <i>Albunea speciosa</i>. — Davie, 2002: 27. — Boyko, 2002: 230 –238, figs. 75, 76 (full synonymy). — Eldredge and Evenhuis, 2003: 16. — McLaughlin <i>et al.</i> 2005: 240 (list). — Poupin, 2005: 21 (list).</p> <p> <b>Material examined. Mariana Islands, Guam</b>: northwest coast, Ritidian channel, right in front of channel at the beach, rubble area in sand, 13°39.153’N, 144°51.164’E, 20 m depth, coll. L. Kirkendale, 21 Jun 2002: 1 female, 5.9 mm cl (FLMNH UF 3117). <b>U.S.A., Hawaii:</b> sand, Oahu, coll. Unknown, Oct 2006 (FLMNH UF 11993).</p> <p> <b>Distribution.</b> Mascarene Island (Réunion), Seychelles, Maldives, Australia (Western Australia), Loyalty Islands, Japan, Society Islands, Mariana Islands (Guam), Marquesas Islands, U.S.A. (Hawaii), in 3.0– 34 m depth (Boyko 2002, Paulay <i>et al.</i> 2003).</p> <p> <b>Remarks.</b> The Guam specimen was first reported by Paulay <i>et al.</i> (2003).</p>Published as part of <i>Boyko, Christopher B., 2010, New records and taxonomic data for 14 species of sand crabs (Crustacea: Anomura: Albuneidae) from localities worldwide, pp. 49-61 in Zootaxa 2555</i> on page 52, DOI: <a href="http://zenodo.org/record/196904">10.5281/zenodo.196904</a>
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Pleurocryptella altalis Williams & Boyko & Marin 2020, sp. nov.
No full textPleurocryptella altalis sp. nov. urn:lsid:zoobank.org:act: 65006984-C3F1-4C31-ABEF-8225A15F921E Figs 1–3 “C параЗИтИческой ИЗоподой под карапаксом” – Birstein & Zarenkov 1970: 423, fig. 1. “parasitic isopod” – Birstein & Zarenkov 1972: 442, fig. 1. “bopyrid parasite” – Boyko et al. 2012: 25, table 1. — Marin 2020: 2, figs 1a, 17f. Etymology Combination of Latin words ‘ altum ’ (‘deep’) and ‘ alis ’ (‘pertaining to’) in reference to its occurrence at the greatest depth known for any bopyrid species. Type material Holotype KURIL-KAMCHATKA TRENCH • ♀ (10.4 mm TL) from right branchial chamber of ♂ Munidopsis petalorhyncha Baba, 2005 (21.0 mm CL, 15 mm CW, ZMMU Ma 3504); 39 th cruise of R/V ‘ Vityaz ’, stn 5621, Sigsbee trawl; 45°18′ N, 156°00′ E; depth 5060–5130 m; 17 Aug. 1966; ZMMU Mс 1420. Allotype KURIL-KAMCHATKA TRENCH • 1 ♂ (4.3 mm TL); same collection data as for holotype; ZMMU Mс 1421. Description Female (Figs 1B, 2) Body length 10.4 mm, maximum width 6.8 mm across pereomere 3, head length 1.9 mm, head width 3.0 mm. Body ovoid, pereon very slightly deflexed dextrally (Figs 1B, 2A), all body regions and pereomeres distinctly segmented. Head subrectangular, broader than long, with frontal lamina extending beyond pereomere 1 and rounded extensions laterally (Fig. 2A), eyes lacking. Barbula with two long, thin, tapering lateral lobes, subequal in length (Fig. 2C).Antennules of three articles each, terminal article minute, setose; antennae of five articles each, terminal article setose (Fig. 2D). Maxilliped (Fig. 2E) with minute setae, most prominent on distal margin, short subacute spur; segmented subcylindrical palp present, with stout setae. Oostegite 1 (Fig. 2 F–G) proximal lobe ovate, distal lobe approximately 50% narrower than proximal lobe, internal ridge smooth (Fig. 2G). Pereon of seven pereomeres (Fig. 2A), broadest across pereomere 3, gradually tapering anteriorly and posteriorly; pereomere 1 with convex posterior margin corresponding with posterior margin of head; pereomeres 2–4 straight, pereomeres 5–7 wavy, with progressively greater median concavity and crenulate margins (Fig. 2A). Coxal plates and dorsolateral bosses on pereomeres 1–5 (Fig. 2A), pereomeres 2–3 with weakly produced tergal projections on right side (Fig. 2A). Oostegites incompletely enclosing marsupium (Fig. 2B), last two pairs of oostegites reduced, plate-like, with setae on margins (Fig. 2L). Pereopods subequal (Fig. 2 F–K), with small dactyli and broad bases, setae on all articles except bases; first pair at sides of head, others evenly spaced. Pleon with six pleomeres including pleotelson (Fig. 2B, M). Pleomeres 1–4 with biramous, digitiform pleopods, appearing as two stacked articles; pleomere 5 with uniramous, irregularly shaped pleopods; uropods (Fig. 2M) uniramous, tapering distally, directed distolaterally, extending just beyond anal cone. Male (Figs 1 B–C, 3) Length 4.3 mm, maximum width 1.7 mm, head length 0.5 mm, head width 1.3 mm, pleon length 1.2 mm. Head hemispherical, widest at posterior margin, distinct from pereomere 1 (Figs 1 B–C, 3A–B), eyes lacking. Antennules of three articles each, terminal article setose (Fig. 3C); antennae of five articles each, basal three articles with rounded extensions, distal three articles setose (Fig. 3D). Maxilliped bisegmented (Fig. 3E), basal segments small, subrectangular, distal segment elongate with two short, stout setae and four longer, thinner setae on distal end. Pereomere 4 broadest, others tapering slightly anteriorly and posteriorly (Figs 1 B–C, 3A–B). Pereomeres 1–4 approximately straight, pereomeres 5–7 directed posterolaterally, distolateral margins of all pereomeres rounded. Pereopods 1 and 2 (Fig. 3A, F) each with long, curved dactylus extending to carpus; propodus large, broad; carpus and merus small, rounded; ischium and basis elongate; all articles, except dactylus and basis, with small setae. Pereopods 3–7 (Fig. 3A, G–H) subequal, all with shorter dactyli than pereopods 1 and 2, other articles similar to pereopods 1 and 2, bases with slight distal bulge. Pleon (Figs 1C, 3A, I) of six pleomeres, pleomeres 5–6 curved anteriorly, sides of all pereomeres curled ventrally and overlapping. Broad midventral tubercles on pleomeres 1–4, reduced one on pleomere 5 (Fig. 3A, I), small, low, rounded pleopods on pleomeres 1–5, mostly obscured by curled lateral margins of pleomeres (Fig. 3I). Pleotelson bearing articulated, triangular-shaped uropods (Fig. 3A, I) extending beyond anal cone. Note on host identification The host was originally identified as the holotype of Munidopsis subsquamosa latimana Birstein & Zarenkov, 1970, but, because that name is a junior homonym of M. latimana Miyake & Baba, 1966, Baba (2005) proposed the replacement name M. petalorhyncha Baba, 2005. Remarks The new species appears most closely related to Pleurocryptella formosa and P. wolffi. Males of these three species all have low, broad midventral tubercles on pleomeres 1–4 that cover nearly all of the space between the pleopods, whereas males of all other species in the genus have small, semispherical tubercles on the pleomeres that do not cover the space between the pleopods. Both sexes of Pleurocryptella altalis sp. nov. are distinguishable from those of P. formosa and P. wolffi. Males of P. altalis sp. nov. have the lateral margins of the pleomeres curled laterally and covering the pleopods in ventral view (also curled in P. wolffi, but splayed laterally and pleopods visible in ventral view in P. formosa), the head nearly as broad as pleomere 1 (also as broad in P. wolffi but much narrower than pleomere 1 in P. formosa), and the uropods larger than pleopod 5 (uropods smaller than pleopod 5 in P. wolffi and the same size as pleopod 5 in P. formosa). Females of P. altalis sp. nov. have the barbula with two acute, slender lobes of approximately the same length (barbula with outer lobe tapered but much broader, inner lobe much shorter than outer and rounded in P. wolffi and P. formosa), pleopod 5 less than half as large as pleopod 4 and uniramous (pleopod 5 more than half as large as pleopod 4 and biramous in P. wolffi and P. formosa), and pleomeres smoothly curved with pleomere 5 not surrounding pleotelson (pleomeres smoothly curved, but surrounding pleotelson in P. wolffi and not smoothly curved (angular middle portion) and not surrounding pleotelson in P. formosa).Published as part of Williams, Jason D., Boyko, Christopher B. & Marin, Ivan N., 2020, A new species and depth record of bopyrid (Crustacea, Isopoda) from a squat lobster in the Kuril-Kamchatka Trench, pp. 122-133 in European Journal of Taxonomy 724 on pages 124-127, DOI: 10.5852/ejt.2020.724.1165, http://zenodo.org/record/562758
Nuclis temàtics per a una geografia crítica: les propostes de D.R. Stoddart i D. Harvey
No full textL�autor introdueix el concepte de geografia crítica i comenta dues reflexions sobre la geografia.
Les aportacions de D. R. Stoddart a Berkeley el 1986 i D. Harvey a Heidelberg el 2004. Llurs
propostes propugnen una geografia crítica compromesa amb el coneixement i amb la solució dels
problemes ambientals i socials del seu temps.The author introduces the concept of critical geography and discusses two reflections on geography.
The contributions of D. R. Stoddart at Berkeley in 1986 and D. Harvey at Heidelberg in
2004. Their proposals advocate a critical geography committed with the knowledge and the solution
of environmental and social problems of his time
R-4.2.0 with all libraries necessary for caMeL
No full textThis is a zipped file with R 4.2.0 and all libraries that are necessary for for caMeL interface operation. Simply follow the guidelines to prepare your environment.Disclaimer: this is a full environment for the software operations. I am not an author of it. You should cite the developers accordingly (https://ropensci.org/blog/2021/11/16/how-to-cite-r-and-r-packages/).</p
Bianchi type-I universe in f(R, T) modified gravity with quark matter and Λ
No full text32nd International Physics Congress of Turkish-Physical-Society (TPS) -- SEP 06-09, 2016 -- Bodrum, TURKEYIn this study, we investigate homogeneous and anisotropic Bianchi type I universe in the presence of quark matter source in f (R, T) gravity (Harko et al. in Phys. Rev. D 84:024020, 2011) with cosmological constant A (where R is the Ricci scalar and T is the trace of the energy momentum tensor). For this aim we have used the anisotropy feature of Bianchi type I universe and equation of states (EoS) of quark matter. We explore the exact solution f(R, T)=R + 2f(T) model for Bianchi type I universe model. When t -> infinity, we get very small cosmological constant value, this result agrees with recent observations.Turkish Phys So
Detecting intestinal ischemia using near infrared spectroscopy
No full textBlood supply to the intestine can suddenly be interrupted. Acute mesenteric intestinal ischemia often requires invasive surgery to restore blood supply to the intestine. Early correction of vascular insufficiency is the most important factor in improving patient survival when confronted with acute mesenteric intestinal ischemia. A prolonged loss of blood flow results in irreversible damage to the intestine that can lead to death. It is also imperative that dead segments of the intestines be removed. Several subjective criteria are relied upon to differentiate viable from non-viable tissue, unfortunately, these criteria can lead to an inaccurate assessment. A porcine model of intestinal ischemia was used to determine the efficacy of using near infrared (NIR) spectroscopy to find ischemic segments of the intestine and detect the onset of reperfusion following resolution of vascular occlusion. Nine segments of intestine were identified and six were assigned to three treatment groups; (1) segments undergoing no vascular manipulations, (2) segments undergoing arterial/venous occlusion and (3) segments undergoing arterial/venous occlusion followed by reperfusion. The remaining segments were used as spacers and interposed between each of the ischemia segments. A classification model, using partial least square discriminant analysis, was built on the spectra collected from the segments with no vascular manipulations and the segments that were solely subjected to arterial/venous occlusion. The spectra collected from the intestinal segments that experienced both occlusion and reperfusion were used to test the classification model. The model was able to detect and distinguish ischemic intestinal tissue with a specificity and sensitivity exceeding 80% with an overall classification accuracy of 89%. The method appears to be well suited as an intra-operative assessment method when intestinal ischemia is a concern.Michael G. Sowa, Elicia Kohlenberg, Jeri R. Payette, Lorenzo Leonardi, Michelle A. Levasseur and Christopher B. Rile
- …
