221 research outputs found
Antipathozoanthus hickmani Reimer & Fujii 2010, sp. n.
No full textAntipathozoanthus hickmani sp. n. urn:lsid:zoobank.org:act: BC6BFB57-105C-4EC4-AEF4-87CC8B33DBDE Figures 1, 5, 7, 9, Tables 1, 2, 3 Etymology. Named after Dr. Cleveland Hickman, Jr., who graciously invited the first author to the Galápagos, and collected the first specimens of this new species. Noun in the genitive case. Material examined. Type locality: Ecuador, Galapagos: Floreana I., La Batielle, 1.2904°S 90.4989°W. Holotype: Specimen number MHNG-INVE-67495. Colony of approximately 40 polyps connected by well-developed coenenchyme on two branches of Antipathes galapagensis Diechmann, 1941 branches. Both branches approximately 7 cm long. Polyps approximately 1.5–4.0 mm in diameter, and approximately 1.0–6.0 mm in height from coenenchyme. Coenenchyme covers branches of antipatharian. Polyps and coenenchyme sand encrusted, cream-yellow in color. Collected from La Batielle, Floreana I., Galapagos, Ecuador, at 31.4 m by A. Chiriboga (AC), March 13, 2007. Preserved in 99.5% ethanol. Paratypes (all from Galapagos, Ecuador): Paratype 1. Specimen number CMNH-ZG 05883. Collected from Roca Onan, Pinzon I., at 27 m by AC, March 14, 2007. Figure ļ. Antipathozoanthus hickmani sp. n. in situ in the Galapagos. a holotype MHNG-INVE-67495 showing the entire colony covering an Antipathes galapagensis, with living antipatharians visible in the background. Image by Angel Chiriboga (AC) b specimen MISE 441 at Don Ferdi, Bainbridge Rocks, Santiago I., at 23 m by JDR, March 9, 2007 c and d specimen MISE 474, Roca Onan. Pinzon I., at 35 m by AC. All scale bars: 1 cm except in a (10 cm). Paratype 2. Specimen number USNM 1134064. Collected from Cousins Rock, at 28 m by James D. Reimer (JDR), March 10, 2007. Other material (all from Galapagos, Ecuador): MISE 03-221, Cousins Rock, at 12 m by AC on October 9, 2003; MISE 03-539, Cousins Rock, at 20 m by CH on November 11, 2003; MISE 03-549, Cousins Rock, at 23 m by CH on November 11, 2003; MISE 04-341, Elizabeth Bay, Isabela I., at 25 m by G. Edgar (GE) on December 2, 2003; MISE 440, Don Ferdi, Bainbridge Rocks, at 22 m by JDR, March 9, 2007; MISE 441, Don Ferdi, Bainbridge Rocks, at 23 m by JDR, March 9, 2007; MISE 444, Cousins Rock, Galapagos, Ecuador, at 21 m JDR, March 10, 2007; MISE 474, La Batielle, Floreana I., at 35 m by AC, March 14, 2007. Sequences. See Table 1. Description. Size: Polyps in situ approximately 4–12 mm in diameter when open, and approximately 4–15 mm in height. Morphology: Antipathozoanthus hickmani has approximately 40 bright yellow and/ or red tentacles, with long red, yellow, or cream-colored polyps that extend well clear of the coenenchyme (Figure 1). Tentacles are almost always longer than the expanded oral disk diameter. Cnidae: Basitrichs and microbasic p-mastigophores (often difficult to distinguish), holotrichs (large and medium), spirocysts (see Table 2, Figure 9). Table ļ. Examined zoanthid specimens for new species from the Galapagos Islands, and GenBank Accession Numbers. NA = not available or data not acquired. aSpecimens with the designations such as 03-560 are from 2001-2004 surveys (see Reimer et al. 2008b). Other specimens are from 2007 and have either specimen numbers (e.g. 471) in JDR’s collection, or museum type specimen numbers as given. Abbreviations: USNM: National Museum of Natural History, Smithsonian Institution, Washington, D.C., USA, CMNH: Chiba Prefectural Natural History Museum, Japan, MHNG: Natural History Museum of Geneva, Switzerland, MISE: Molecular Invertebrate Systematics and Ecology Laboratory, University of the Ryukyus, Nishihara, Okinawa, Japan. bLatitude and longitude values that are negative represent South and West values respectively, while positive values (latitude only) represent North values. cCollector abbreviations: CH = C. Hickman, Jr., LV = L. Vinueza, AC = A. Chiriboga, GE = G. Edgar, JDR = JD Reimer, RP = R. Pepolas, FL = F. Liss, BR = B. Riegl, DR = D. Ruiz, FR = F. Riveiria, OB = O. Breedy, MV = M. Vera. Differential diagnosis. Differs from Antipathozoanthus macaronesicus (Ocaña & Brito, 2004) (with regards to distribution; Galapagos as opposed to Cape Verde), coloration (no red or cream colors observed in A. macaronesicus), substrate (Antipathes galapagensis as opposed to Tanacetipathes cavernicola Opresko, 2001). Other morphologically similar and undescribed zoanthids (epizoic on antipatharians, similar sizes, yellowish in color) have been recorded from Madagascar and Japan (specimens in JDR’s collection), although these other specimens were found on different antipatharian species than Antipathozoanthus hickmani, and were never red or cream in color. Antipathozoanthus hickmani is the only zoanthid in the Galápagos found on living Antipathes galapagensis (Table 3). Habitat and distribution. All collected samples from Galapagos were on the black coral Antipathes galapagensis, at depths of 12 m to 35 m. Although A. galapagensis is found throughout the archipelago, Antipathozoanthus hickmani colonies were observed only at Santiago, Floreana, Isabela and Pinzon Islands, and it may be that this genus has a patchy distribution in the Galápagos. A. hickmani is potentially also found at Isla del Coco (Costa Rica) on the same antipatharian species, based on Museo de Zoologia, University of Costa Rica specimen UCR 827, although this has yet to be confirmed with detailed examinations. Biology and associated species. Antipathozoanthus hickmani may cover only a portion of a living Antipathes galapagensis black coral colony, or cover the entire colony, suggesting this species may be parasitic. Some A. hickmani specimens were found on completely dead A. galapagensis colonies or branches. Notes. Previously mentioned in Reimer et al. (2008b, 2010) and Hickman (2008) as Parazoanthus sp. G1.Published as part of Reimer, James & Fujii, Takuma, 2010, Four new species and one new genus of zoanthids (Cnidaria, Hexacorallia) from the Galapagos Islands, pp. 1-36 in ZooKeys 42 (42) on pages 6-14, DOI: 10.3897/zookeys.42.378, http://zenodo.org/record/57665
Terrazoanthus onoi Reimer & Fujii 2010, sp. n.
No full text<i>Terrazoanthus onoi</i> sp. n. <p>urn:lsid:zoobank.org:act: 429212C7-BC17-4ECC-BC66-85465AFE7C83</p> <p>Figures 3, 5, 6, 8, 9, Tables 1, 2, 3</p> <p> <b>Etymology.</b> This species is named in honor of Dr. Shusuke Ono, who introduced the first author to zoanthids and has played a major role in zoanthid research in Japan. Noun in the genitive case.</p> <p> <b>Material examined.</b> <i>Type locality</i>: Ecuador, Galapagos: Espanola I., Anchorage, 1.3646°S 90.2953°W.</p> <p> <i>Holotype</i>: MHNG-INVE-67496. Colony on rock, approximately 3.0 × 6.0 cm. Total of approximately 130 polyps connected by well-developed coenenchyme. Polyps approximately 1.0–3.0 mm in diameter, and approximately 0.5–2.0 mm in height from coenenchyme. Polyps and coenenchyme encrusted with sand, tissue of polyps and coenenchyme dark brown in color. Collected from Anchorage, Espanola I., Galapagos, Ecuador, at low tide line, collected by AC, March 12, 2007. Preserved in 99.5% ethanol.</p> <p> <i>Paratypes</i> (all from Galapagos, Ecuador):</p> <p>Paratype 1. Specimen number CMNH-ZG 05885. Glynn’s Reef, Darwin I., at 13 m, collected by FL and AC, March 8, 2007.</p> <p>Paratype 2. Specimen number USNM 1134066. Whale Rock, San Cristobel I., at 21 m, collected by JDR, March 12, 2007.</p> <p> <b>Other material</b> (all from Galapagos, Ecuador): MISE 02-59, Punta Vincente Roca, Isabela I., at 9 m, collected by CH, May 20, 2002; MISE 03-46, Punta Vincente Roca, Isabela I., at 2 m, collected by CH, January 16, 2003; MISE 03-135, Roca Onan, Pinzon I., depth not available, collected by L. Vinueza (LV), January 20, 2003; MISE 03-566, Punta Espejo, Marchena I., at 9 m, collected by CH, November 12, 2003; MISE 03-641, Punta Vincente Roca, Isabela I., depth not available, collected by CH, November 15, 2003; MISE 04-140, La Botella, Floreana I., at 8 m, collected by AC, February 8, 2004; MISE 04-343, Caleta Iguana, Isabela I., depth not available, collected by GE, December 3, 2004; MISE 04-345, Caleta Iguana, Isabela I., at 8 m, collected by CH, December 3, 2004; MISE 04-346, Elizabeth Bay, Isabela I., at 25 m, collected by GE, December 2, 2004; MISE 04-347, Elizabeth Bay, Isabela I., at 13 m, collected by CH, December 2, 2004; MISE 467, Gardner, Floreana I., 14 m, collected by JDR and CH, March 13, 2007; MISE 469, Devil’s Crown, Floreana I., 12 m, collected by JDR and MV, March 13, 2007; MISE 473, La Botella, Floreana I., at 12–15 m, collected by AC, March 13, 2007; MISE 475, Roca Onan, Pinzon I., 8 m, collected by AC, March 14, 2007</p> <p> <b>Sequences.</b> See Table 1.</p> <p> <b>Description.</b> <i>Size</i>:</p> <p>Polyps are approximately 4–12 mm in diameter when open, and rarely more than 20 mm in height. Colonies may reach sizes of over a meter in diameter.</p> <p> <i>Morphology</i>: <i>Terrazoanthus onoi</i> has bright red or red-brown oral disks and the outer surface of polyps is tan to dark brown, with polyps relatively clear of the coenenchyme. <i>T. onoi</i> has 32 to 40 tentacles that are almost as long as the diameter of the expanded oral disk (Figure 3).</p> <p> <i>Cnidae</i>: Basitrichs and microbasic p-mastigophores (often difficult to distinguish), holotrichs (large, medium, and small), spirocysts (see Table 2, Figure 9).</p> <p> <b>Differential diagnosis.</b> In the Galápagos, <i>Terrazoanthus onoi</i> differs from <i>Parazoanthus darwini</i> and <i>Antipathozoanthus hickmani</i> by substrate preference (rock as opposed to sponges and anthipatharians, respectively), as well as from <i>Terrazoanthus sinnigeri</i> sp. n. (below) by both color (bright red as opposed to brown, white or transparent) and habitat ecology (exposed rock surfaces as opposed to under rocks and rubble). In addition, <i>T. onoi</i> is bigger (oral disk diameter and polyp height) than <i>T. sinnigeri</i>, and forms much larger colonies (Table 3). <i>T. onoi</i> commonly has only basitrichs and microbasic p-mastigophores in its pharynx, and no large or small holotrichs at all, unlike <i>T. sinnigeri</i> (Table 2).</p> <p>Phylogenetically, <i>Terrazoanthus onoi</i> is very closely related to <i>T. sinnigeri</i>, with identical COI and mt 16S rDNA sequences, but consistently differs by four base pairs in ITS-rDNA, and forms a clade separate from <i>T. sinnigeri</i>.</p> <p>An extensive literature search revealed no other described Parazoanthidae species from the Pacific that are non-epizoic and bright red in color. An undescribed zoanthid species inhabiting rock and coral reef substrata from Indonesia often referred to as “yellow polyps” (<i>sensu</i> Sinniger et al. 2005) is likely also a <i>Terrazoanthus</i> sp., but is distinct from <i>T. onoi</i> in terms of color and distribution, and is phylogenetically different.</p> <p> <b>Habitat and distribution.</b> Specimens of <i>Terrazoanthus onoi</i> were found on rock substrate in areas of high current (i.e., the base of large rocks, rock walls, etc.). Colonies were found at Darwin, Marchena, Genovesa, Isabela, Pinzon, Española, and Floreana Islands, and it is likely <i>T. onoi</i> is found throughout the archipelago. This species has been found from the low infra-littoral to depths of over 35 m, and is likely to be at even deeper depths.</p> <p> <b>Biology and associated species.</b> Found on the top surfaces of rocks and biogenic non-living substrate, <i>Terrazoanthus onoi</i> is often found close to sponges, seaweed, and oth- er benthos, but is not epizoic and does not have an association with any particular species.</p> <p> <b>Notes.</b> Previously mentioned in Reimer et al. (2008b, 2010) and Hickman (2008) as <i>Parazoanthus</i> sp. G3, except for specimen MISE 02-27 mentioned below.</p> <p>It should be noted that specimen MISE 02-27 was found to have an ITS-rDNA sequence inconsistent with other <i>Terrazoanthus onoi</i> specimens (Figure 6), although other data (morphology, mt 16S rDNA and COI data) fit well with <i>T. onoi</i>. For these reasons, this specimen has not been conclusively assigned to <i>T. onoi</i> or to the other new <i>Terrazoanthus</i> species below. These results indicate there may be other <i>Terrazoanthus</i> species in the Galápagos that await discovery and description.</p>Published as part of <i>Reimer, James & Fujii, Takuma, 2010, Four new species and one new genus of zoanthids (Cnidaria, Hexacorallia) from the Galapagos Islands, pp. 1-36 in ZooKeys 42 (42)</i> on pages 20-23, DOI: 10.3897/zookeys.42.378, <a href="http://zenodo.org/record/576650">http://zenodo.org/record/576650</a>
Software for qualitative research: 2. Some thoughts on ‘aiding’ analysis
No full textIn this paper the author examines how Korea's export-oriented economy has laid its new foundation for global competitiveness by deepening interfirm linkages. Korea's interfirm linkages refer mainly to the relationship between large and small firms. Recent corporate restructuring in the large and small firm sectors has caused denser and highly dynamic intercorporate networks to arise. The author argues that the globalizing of economy in Korea is encouraged by efficacious global - local transactions via large - small firm networks, a matter ignored by most analysts. Major foci are on analyzing the forms, structures, governing mechanisms, and function of large - small firm networks
Uncoverings: The Research Papers of the American Quilt Study Group, Volume 18 (1997), Includes Cumulative Author Index, Volumes 1-17
No full textPreface by Virginia Gunn
Research Papers
The Quilting Records of Rachel Adella Jewett and Lucyle Jewett by Sara Reimer Farley and Nancy Hornback
Art Quilt Makers and Their Critique Groups by Barbara Carow
The Sunday Friends: The Group and Their Quilts by Lorre M. Weidlich
Quilt Ownership and Sentimental Attachments: The Structure of Memory by Catherine A. Cerny
Feed Sacks in Georgia: Their Manufacture, Marketing, and Consumer Use by Ruth Rhoades
Hawaiian Outline-Embroidered Quilts by Loretta B. Hammonds Woodard
Waccamaw-Siouan Quilts: A Model for Studying Native American Quilting by Jill Hemming
Seminar Keynote Address
Women\u27s Quilts and Diaries: Creative Expression and Personal Resource by Gayle R. Davis
Authors and editor
Index
Cumulative author index, volumes 1-17 (1980-1996
Water Vapour Distribution in HT-PEFC - A Pragmatical Approach for CFD Simulations
No full textAbstract for poster presentationWater vapour distribution in HT-PEFC a pragmatical approach for CFD simulationsUwe Reimer*1, Dieter Froning1, Werner Lehnert1,21 Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Electrochemical Process Engineering, 52425 Jülich, Germany2 Modeling in Electrochemical Process Engineering, RWTH Aachen University, Aachen, Germany*Presenting author, email: [email protected], Tel.: +49 2461-3537In polymer electrolyte fuel cells water is produced within the cathode catalyst layer. This water is leaving the fuel cell both through anode and cathode gas channel. The distribution of water to anode and cathode side is difficult to predict. It depends on material properties of membrane, catalyst layers, microporous layers and gas diffusion layers [1,2]. Additionally, the dynamics of evaporation and condensation which in turn are strongly influenced by flow configuration, local current density and local temperature have to be taken into account in order to obtain correct values for mass flow and local gas concentration in CFD simulations [1].For HT-PEFCs operated at 160 °C the produced water is in the gas state. Recently, a detailed model for vapour distribution was published [3]. In order to obtain a model with little computational demand a model for water distribution is developed. The basic assumption is that water evaporation is very fast and the final distribution between cathode and anode depends mainly on the mass flow in the gas channels. In order to reach the anode water has to pass through the membrane. This process is captured by including a resistance term in the model. This resistance term is fitted to experimental data. The fitted value for the resistance term is rather small at ‘normal’ operation conditions and leads to a difference of 10 % compared to the model which only considers the mass flow on anode and cathode. Therefore, the presented model might be a practical approach to include the effect of water vapour distribution to cathode and anode as a rough estimation. This is important because local current density and voltage are depending on correct values for local concentrations. The experiment was carried out with a HT-PEFC single cell with PBI/ phosphoric acid membrane operated at 160 °C and ambient pressure with air and hydrogen. The CFD model is based on a previously published one [4] with the extension of water distribution [5]. The flow field geometry is a threefold meander with an active area of 17 cm2.[1] A. Z. Weber, R. L. Borup, R. M. Darling, P. K. Das, T. J. Dursch, W. Gu, D. Harvey, A. Kusoglu, S. Litster, M. M. Mench, R. Mukundan, J. P. Owejan, J. G. Pharoah, M. Secanell and I. V. Zenyuk, J. Electrochem. Soc., 161 (2014), F1254 [2] A. Thomas, G. Maranzana, S. Didierjean, J. Dillet, O. Lottin, Int. J. Hydrogen Energy, 39 (2014), 2649[3] T. J. Kazdal, S. Lang, F. Kühl, M. J. Hampe, J. Power Sources, 249 (2014), 446[4] M. Kvesić, U. Reimer, W. Lehnert, D. Froning, L. Lüke, D. Stolten, Int. J. Hydrogen Energy, 37 (2012), 2430[5] A. Kind, Masterthesis, FH Aachen, Jülich/ Aachen, Germany (2014
Observation of strongly entangled photon pairs from a nanowire quantum dot
No full textA bright photon source that combines high-fidelity entanglement, on-demand generation, high extraction efficiency, directional and coherent emission, as well as position control at the nanoscale is required for implementing ambitious schemes in quantum information processing, such as that of a quantum repeater. Still, all of these properties have not yet been achieved in a single device. Semiconductor quantum dots embedded in nanowire waveguides potentially satisfy all of these requirements; however, although theoretically predicted, entanglement has not yet been demonstrated for a nanowire quantum dot. Here, we demonstrate a bright and coherent source of strongly entangled photon pairs from a position-controlled nanowire quantum dot with a fidelity as high as 0.859±0.006 and concurrence of 0.80±0.02. The two-photon quantum state is modified via the nanowire shape. Our new nanoscale entangled photon source can be integrated at desired positions in a quantum photonic circuit, single-electron devices and light-emitting diodes.QN/Quantum NanoscienceApplied Science
Bright nanoscale source of deterministic entangled photon pairs violating Bell’s inequality
No full textGlobal, secure quantum channels will require efficient distribution of entangled photons. Long distance, low-loss interconnects can only be realized using photons as quantum information carriers. However, a quantum light source combining both high qubit fidelity and on-demand bright emission has proven elusive. Here, we show a bright photonic nanostructure generating polarization-entangled photon pairs that strongly violates Bell’s inequality. A highly symmetric InAsP quantum dot generating entangled photons is encapsulated in a tapered nanowire waveguide to ensure directional emission and efficient light extraction. We collect ~200 kHz entangled photon pairs at the first lens under 80 MHz pulsed excitation, which is a 20 times enhancement as compared to a bare quantum dot without a photonic nanostructure. The performed Bell test using the Clauser-Horne-Shimony-Holt inequality reveals a clear violation (SCHSH > 2) by up to 9.3 standard deviations. By using a novel quasi-resonant excitation scheme at the wurtzite InP nanowire resonance to reduce multi-photon emission, the entanglement fidelity (F = 0.817 ± 0.002) is further enhanced without temporal post-selection, allowing for the violation of Bell’s inequality in the rectilinear-circular basis by 25 standard deviations. Our results on nanowire-based quantum light sources highlight their potential application in secure data communication utilizing measurement-device-independent quantum key distribution and quantum repeater protocols
Chondrolectin mediates growth cone interactions of motor axons with an intermediate target
No full textThe C-type lectin chondrolectin (chodl) represents one of the major gene products dysregulated in spinal muscular atrophy models in mice. However, to date, no function has been determined for the gene. We have identified chodl and other novel genes potentially involved in motor axon differentiation, by expression profiling of transgenically labeled motor neurons in embryonic zebrafish. To enrich the profile for genes involved in differentiation of peripheral motor axons, we inhibited the function of LIM-HDs (LIM homeodomain factors) by overexpression of a dominant-negative cofactor, thereby rendering labeled axons unable to grow out of the spinal cord. Importantly, labeled cells still exhibited axon growth and most cells retained markers of motor neuron identity. Functional tests of chodl, by overexpression and knockdown, confirm crucial functions of this gene for motor axon growth in vivo. Indeed, knockdown of chodl induces arrest or stalling of motor axon growth at the horizontal myoseptum, an intermediate target and navigational choice point, and reduced muscle innervation at later developmental stages. This phenotype is rescued by chodl overexpression, suggesting that correct expression levels of chodl are important for interactions of growth cones of motor axons with the horizontal myoseptum. Combined, these results identify upstream regulators and downstream functions of chodl during motor axon growth
Miracle-workers and magicians in the Acts of the Apostles and Philostratus' Life of Apollonius of Tyana.
No full textThe miracle-workers and magicians we meet in the Greco-Roman world and on the pages of Greco-Roman narratives are among the most difficult characters for modem scholars to understand. While Greco-Roman writers presume their readers will share their socio-cultural script and understand how one distinguishes between a legitimate miracle-worker and an illegitimate magician, this script is lost on modem scholars. Hindered first by absolute definitions for miracle and magic from social anthropology and then by relative definitions from the sociology of knowledge, this thesis calls for a re-engagement of the "historic imagination" with respect to these sorts of characters. In particular, this thesis suggests that a detailed investigation into the operation of characters labelled as performers of miracles or magic can reveal the criteria which distinguished the two in the minds of Greco-Roman Mediterraneans as well as revealing the practical outworking of the criteria themselves. Two narratives are chosen for this task-the canonical Acts of the Apostles, representing a Jewish- Christian angle, and Philostratus' Life of Apollonius of Tyana, representing a pagan angle. Methodologically the study proceeds by converting these narratives into "narrative worlds" and then subjecting the narrative worlds to a social investigation using models suggested by the work of Mary Douglas and Peter Brown. Under the rubric of "gaining power, " "intersecting power, " and "defending power" the two narrative worlds projected by these texts are compared and contrasted with respect to the criteria being used to distinguish miracle-worker from magician. The conclusion reached is that in both texts legitimacy for a mediator of divine power is found especially in demonstrating power without appearing desirous of personal gains. A miracle-worker is successful in this regard; a magician is one who fails in this regard
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