140,299 research outputs found
Lamellisphecia champaensis Kallies & Arita 2004
No full textLamellisphecia champaensis Kallies & Arita, 2004 Figs 3, 4, 10 Material examined. Holotype: ♂, Vietnam, Lam Dong Prov., Bao Loc, Dambri, ca. 850 m, 7.viii.2001, Y. Arita leg. (Fig. 3, NSMT). Additional material: 2♂, same locality, 3.v.2003, Y. Arita leg. (Fig. 4, NSMT); 2 ♂, Laos, Houapan Prov., Xamneua Distr., Ban Saleui, 1350 m, 24.vi.2003, S. Nagai leg. (NSMT) (1 ♂, genitalia examined, prep. AK871, Fig. 10). This species was known only from the holotype (Fig. 3). We can now report two additional specimens from Vietnam, collected at the type locality, and two specimens from Laos. The two additional specimen from Vietnam differ from the holotype by the more extensive yellow-orange marking of the abdomen, with tergite 3 being reddish orange and tergite 4 yellow-orange. The two specimens from Laos differ from the ones from Vietnam by having tergite 5 completely yellow-orange in addition to tergites 3 and 4 (Fig. 4). Although this gives them a quite different appearance, they do not show additional distinctive features. We therefore believe that these specimens belong to L. champaensis as and suggest that the extent of yellow-orange markings on the abdomen alone is not suitable to separate different species.Published as part of Arita, Yutaka, Kallies, Axel & Yata, Naoki, 2019, A large hornet mimic clearwing moth of the genus Lamellisphecia Kallies & Arita 2004 (Lepidoptera, Sesiidae) from Nanling, Guangdong, southern China, pp. 477-482 in Zootaxa 4706 (3) on page 480, DOI: 10.11646/zootaxa.4706.3.8, http://zenodo.org/record/356893
Áreas de distribución y riqueza de taxa, el campo de diversidad en diferentes niveles taxónomicos /
No full text\ua0tesis que para obtener el grado de Doctor en Ciencias Biológicas, presenta Crisóforo Fabricio Villalobos Camacho ; asesor Héctor Takeshi Arita Watanabe, Mark Earl Olson Zúnica, Carlos Martorell Delgado. 119 páginas :\ua0ilustraciones. Doctorado en Ciencias Biológicas\ua0UNAM, Instituto de Ecología,\ua0201
Verification of Focusing System for Time-of-Propagation Counter
No full textAbstractThe results of verifying focusing system for Time Of Propagation (TOP) counter is presented. The TOP counter have been developed as a new detector for particle identification at Belle-II experiment, which is a Ring Imaging Cherenkov counter with precise timing information. Performance of the TOP counter is directly depended on the time resolution for single photon detection. Propagated Cherenkov photons have group velocity related to wavelength. It generates fluctuation of propagation time approximately 53 ps/m. Chromatic dispersion provides serious deterioration of time resolution. Against this problem, the focusing mirror is planed to introduce. It focuses Cherenkov light to different channels of MCP-PMT by different wavelength, and so that the deterioration of time resolution is suppressed. We verified focusing mechanism using 120GeV/c π beam at CERN. Using a prototype TOP counter with the focusing mirror, we could confirm a work of focusing mechanism. The time resolution improved from 147 ps to 95 ps by using focusing mirror
Diversidad y distribución de la mastofauna marina en el Océano Pacífico mexicano y aguas adyacentes /
No full text\ua0tesis que para obtener el grado de Doctor en Ciencias Biológicas, presenta Hiram Rosales Nanduca ; asesor Luis Medrano González, María Ana Fernández Álamo, Enrique Martínez Meyer, Héctor Takeshi Arita Watanabe. 122 páginas :\ua0ilustraciones, diagramas, mapas
New and old species of Glyphipterigidae and a new species of Acrolepiidae from Japan and the Far East (Lepidoptera)
No full textThe often so gaudy coloured Palaearctic representatives of the family Glyphipterigidae are receiving renewed attention after a neglect of many years. In the USSR several genera of the Choreutinae have been revised (the late A. S. Danilevsky, 1964; A. S. Danilevsky & V. I. Kuznetsov, 1973) and a survey of the family in Japan has been initiated by revisions and descriptions of species of Glyphipterix Hübner, Brenthia Clemens, Tebenna Billberg, Choreutis Hübner, etc. (S. Moriuti & T. Saito, 1964; Y. Arita, 1971, 1971a, 1975, 1976). The first author of the present paper is preparing a revision of the Palaearctic Glyphipterigidae, while J. B. Heppner (University of Florida), is working on the Nearctic fauna of these insects.
Descriptions of four new species of Hilarographa Zeller and of seven new species of Glyphipterix Hübner from Japan and the Far East, and of a new Digitivalva species from Japan are presented below. The greater part of the material at hand has been collected by the second author, who is the specialist of the group in Japan. The first author studied the important Issiki Collection in the Washington Museum, made the descriptions and is responsible for the figures which were made by the artist and amateur entomologist, Mr, A. C. M. van Dijk of The Hague, Netherlands, and a few by himself.
The types will be deposited in the collections of the following institutions, as indicated in the text: Zoological Institute of the Academy of Sciences, Leningrad, USSR (ZIAS); National Museum of Natural History, Smithsonian Institution, Washington D.C., USA (NMNH); Zoological Laboratory, Faculty of Agriculture, Meijo University, Nagoya, Japan (ZLMU); Zoological Laboratory, Hokkaido University, Hokkaido, Japan (ZLHU); and Rijksmuseum van Natuurlijke Historie, Leiden, the Netherlands (RMNH)
Unified understanding of superconductivity and Mott transition in alkali-doped fullerides from first principles
No full textAlkali-doped fullerides A3C60 (A = K, Rb, Cs) are surprising materials where conventional phonon-mediated superconductivity and unconventional Mott physics meet, leading to a remarkable phase diagram as a function of volume per C60 molecule. We address these materials with a state-of-the-art calculation, where we construct a realistic low-energy model from first principles without using a priori information other than the crystal structure and solve it with an accurate many-body theory. Remarkably, our scheme comprehensively reproduces the experimental phase diagram including the low-spin Mott-insulating phase next to the superconducting phase. More remarkably, the critical temperatures Tc’s calculated from first principles quantitatively reproduce the experimental values. The driving force behind the surprising phase diagram of A3C60 is a subtle competition between Hund’s coupling and Jahn-Teller phonons, which leads to an effectively inverted Hund’s coupling. Our results establish that the fullerides are the first members of a novel class of molecular superconductors in which the multiorbital electronic correlations and phonons cooperate to reach high Tc s-wave superconductivity
Exotic s-wave superconductivity in alkali-doped fullerides
No full textAlkali-doped fullerides (A3C60 with A = K, Rb, Cs) show a surprising phase diagram, in which a high transition-temperature (Tc) s-wave superconducting state emerges next to a Mott insulating phase as a function of the lattice spacing. This is in contrast with the common belief that Mott physics and phonon-driven s-wave superconductivity are incompatible, raising a fundamental question on the mechanism of the high-Tc superconductivity. This article reviews recent ab initio calculations, which have succeeded in reproducing comprehensively the experimental phase diagram with high accuracy and elucidated an unusual cooperation between the electron-phonon coupling and the electron-electron interactions leading to Mott localization to realize an unconventional s-wave superconductivity in the alkali-doped fullerides. A driving force behind the exotic physics is unusual intramolecular interactions, characterized by the coexistence of a strongly repulsive Coulomb interaction and a small effectively negative exchange interaction. This is realized by a subtle energy balance between the coupling with the Jahn-Teller phonons and Hund's coupling within the C60 molecule. The unusual form of the interaction leads to a formation of pairs of up- and down-spin electrons on the molecules, which enables the s-wave pairing. The emergent superconductivity crucially relies on the presence of the Jahn-Teller phonons, but surprisingly benefits from the strong correlations because the correlations suppress the kinetic energy of the electrons and help the formation of the electron pairs, in agreement with previous model calculations. This confirms that the alkali-doped fullerides are a new type of unconventional superconductors, where the unusual synergy between the phonons and Coulomb interactions drives the high-Tc superconductivity
DS_10.1177_0022034520913250 – Supplemental material for Effects of Sulfonylureas on Periodontopathic Bacteria-Induced Inflammation
No full textSupplemental material, DS_10.1177_0022034520913250 for Effects of Sulfonylureas on Periodontopathic Bacteria-Induced Inflammation by Y. Kawahara, T. Kaneko, Y. Yoshinaga, Y. Arita, K. Nakamura, C. Koga, A. Yoshimura and R. Sakagami in Journal of Dental Research</p
Chamaesphecia montis Yata & Gorbunov & Arita & Aoki 2018, comb. nov.
No full text<i>Chamaesphecia montis</i> (Leech, 1889), comb. nov. <p>Figs 1–9</p> <p> “ <i>Aegeria montis</i>, sp. n. ” — Leech 1889: 592, pl. 30, fig. 4.</p> <p>Type locality: “A single male … taken at Oiwake, June, 1887.” [= Japan, Honshu, Nagano-ken, Oiwake, Karuizawa-cho, Kitasaku-gun].</p> <p>Holotype: male (Figs 1, 2) (BMNH).</p> <p> = <i>Chamaesphecia montis</i>: Bartel 1912: 407, pl. 51, row i.</p> <p> = <i>Dipsosphecia montis</i>: Hampson 1919: 63; Dalla Torre & Strand 1925: 67.</p> <p> = <i>Bembecia montis</i>: Heppner & Duckworth 1981: 39; Inoue 1981a: 234, Inoue 1981b: pl. 296, fig. 19; Pühringer & Kallies 2004: 37.</p> <p> = <i>Scalarignathia montis</i>: Spatenka <i>et al</i>. 1993: 101; Arita 1994: 78, fig. 39; Arita <i>et al</i>. 1994: 16, fig. 17; Gorbunov & Arita 1995: 257, fig. 1; Špatenka <i>et al</i>. 1996: 10; Špatenka <i>et al</i>. 1999: 248, pl. 36, fig. 286; Arita & Ikeda 2000: 172, fig. 39; Yano 2011: 6; Fukuzumi 2012: 355; Arita 2013: 341, pl. 3–54–24; Kudo 2017: 58.</p> <p> <b>Description. Male</b> (Figs 3, 4, 7). Alar expanse 20.5 mm; body length 12.2 mm; forewing 10.4 mm; antenna 6.1 mm. Head with antenna black with dark blue sheen; frons dark brown to black with bronze-violet sheen; labial palpus yellow mixed with blackish hairs; vertex black with dark bronze-purple sheen; occipital fringe orange dorsally and black mixed with orange laterally.</p> <p>Thorax with patagia black with dark green-bronze sheen; tegula dark brown to black with dark violet-bronze sheen, with a narrow yellow margin internally; both meso- and metathorax dark brown to black with violet-bronze sheen; thorax laterally grey-brown with violet sheen and a large yellow spot. Legs with fore coxa dark brown to black with bronze-violet sheen, covered with dense scales yellow with golden sheen on exterior half; fore tibia dark brown to black with bronze-violet sheen; fore femur dark brown to black with bronze-violet sheen dorsally and yellow with golden sheen ventrally; fore tarsus black dorsally and pale yellow with golden sheen ventrally; hind leg dark brown to black with individual pale yellow scales externally. Forewing dorsally dark brown to black with individual yellow scales between veins R3–R4+5; anterior and external transparent areas well-developed, but covered with dense semi-transparent scales with yellowish hue; posterior transparent area virtually absent; external transparent area rounded, divided into four cells between veins R4+5–CuA1, level to vein M2 about 1/3 broader than discal spot and about 1/4 narrower than apical area; cilia brown with bronze sheen; ventrally costal and anal margins, as well as CuA-stem pale yellow, other surface covered with scales, dark brown to black (discal spot somewhat darker) with an admixture of individual scales between veins R5–M3 distally; cilia brown with bronze sheen. Hindwing transparent; discal spot cuneiform, reaching to base of vein M3–CuA1; outer margin dark brown to black with bronze sheen, narrow, about twice as narrow as cilia; cilia brown with bronze sheen, yellow to pale yellow basally.</p> <p>Abdomen dorsally black with violet-blue sheen; tergite 4 with a narrow pale yellow to white distal margin, tergite 7 with a few pale yellow scales distally; laterally tergites 1+2, 4 and 5 proximally pale yellow to white with golden sheen; ventrally entirely dark brown to black with violet-blue sheen; tuft black with blue sheen and narrow yellow to pale yellow margins.</p> <p> <b>Male genitalia</b> (Figs 5, 6) (genital preparation No. 0 47 NY, 2017). Tegumen -uncus complex (Fig. 5) broad with individual setae apically; scopula androconialis undeveloped; gnathos with crista gnathi lateralis large and ovoid, crista gnathi medialis shorter and more narrow; valva trapeziform, crista sacculi short with strong bifurcate setae, crista centralis long and broad; aedeagus (Fig. 6) narrow, about 1.5 times as long as valva; vesica with two small cornuti.</p> <p> <b>Female.</b> Unknown.</p> <p> <b>Differential diagnosis.</b> Due to both the external characters and the structure of the male genitalia, <i>C. montis</i> seems to be especially close to <i>C. guriensis</i> (von Emich, 1872) and <i>C. kistenjovi</i> Gorbunov, 1991.</p> <p> <i>C. montis</i> is clearly distinguishable from <i>C. guriensis</i> by (i) the coloration of the thorax laterally (entirely dark grey to black in <i>C. guriensis</i> and grey-brown with violet sheen and with a large yellow spot in <i>C. montis</i>), (ii) fore coxa (without yellow scales in <i>C. guriensis</i> and dark brown to black with bronze-violet sheen, covered with dense scales yellow with golden sheen on exterior half in <i>C. montis</i>), (iii) forewing pattern (with more yellow scales between veins in apical area in <i>C. guriensis</i> and completely dark brown to black apical area in <i>C. montis</i>), (iv) the external transparent area of the forewing is larger and divided into five cells between veins R3–CuA 1 in <i>C. guriensis,</i> it is divided into four cells between veins R4+5–CuA 1 in <i>C. montis</i>), (v) abdomen (dorsally tergites 4, 6 and 7 with a very narrow, whitish, posterior margin, tergite 4 covered with dense pale yellow scales throughout in <i>C. guriensis</i> and dorsally tergite 4 with a narrow pale yellow to white distal margin, but tergite 7 with a few pale yellow scales distally in <i>C. montis</i>).</p> <p> <i>Chamaesphecia montis</i> differs from <i>C. kistenjovi</i> by (i) the coloration of the abdomen (dorsally tergite 4 covered with dense yellow scales in <i>C. kistenjovi</i>, dorsally tergite 4 with a narrow pale yellow to white distal margin in <i>C. montis</i>) and (ii) the smaller external transparent area of the forewing (divided into five cells between veins R3–CuA 1 in <i>C. kistenjovi</i>, it is divided into four cells between veins R4+5–CuA 1 in <i>C. montis</i>).</p> <p> <i>Chamaesphecia montis</i> can also be distinguished from the latter species by male genitalia: crista gnathi medialis absent while crista sacculi longer than what in <i>C. guriensis</i> and <i>C. kistenjovi</i> (cp. Fig. 5 with figs 210 and 211 in Špatenka <i>et al</i>. 1999: 501).</p> <p> From the East Palaearctic <i>C. zhuoxiana</i> (Yang, 1977), <b>comb. nov</b>., and <i>C. schroederi</i> Toševski, 1993, <i>C. montis</i> differs in (i) the coloration of abdomen (all tergites of abdomen with a small ocherous spot medially forming a medial line in <i>C. zhuoxiana</i> and <i>C. schroederi</i>, all tergites of abdomen without a medial spot in <i>C. montis</i>) and (ii) the narrow outer margin of the hindwing (broad, about 2–3 times as broad as cilia in <i>C. zhuoxiana</i> and <i>C. schroederi</i>, but narrow, about twice as narrow as cilia in <i>C. montis</i>; cp. Figs 1, 3 with figs 357 in: Špatenka <i>et al</i>. 1999; 457 and pl. 4, fig. 3 in: Yang 1977).</p> <p> <b>Biology.</b> The host-plant of the species is not known exactly, but its systematic position allows us to suggest it to be a species of <i>Euphorbia</i> sp. (Euphorbiaceae). All specimens of the species known to us were collected from mid-June to early July using artificial sex pheromone lures. All of them were attracted at about noon of the local time.</p> <p> <b>Habitat</b> (Figs 8, 9). This species lives both near the upper line of the forest belt (Fig. 8) and in the rhododendron belt (<i>Rhododendron molle</i> subsp. <i>japonicum</i> (A. Gray) Kron) (Fig. 9) at altitudes of about 1600 m in the highlands of central Honshu. It seems appropriate to indicate in connection with occurrence and habitats of <i>C. montis</i> that similar habitats are populated by <i>C. guriensis</i> in high mountains of the Caucasus.</p> <p> <b>Distribution.</b> This species is currently known only from a few localities in the highlands of Iwate and Nagano prefectures, Honshu, Japan. We assume it is endemic to Honshu Island.</p> <p> <b>Material examined:</b> 1 male (Figs 3, 4, 7): Japan, Honshu, Nagano-ken, Shiojiri-shi, Takabocchi, 1650 m, 23.VI.2013, Y. Aoki leg. (NSMT); 1 male, same locality, 16.VI.2013, Y. Aoki leg. (CYAS).</p>Published as part of <i>Yata, Naoki, Gorbunov, Oleg G., Arita, Yutaka & Aoki, Yoshichika, 2018, On the taxonomy and biology of the clearwing moth Aegeria montis (Lepidoptera, Sesiidae), pp. 443-450 in Zootaxa 4369 (3)</i> on pages 444-448, DOI: 10.11646/zootaxa.4369.3.9, <a href="http://zenodo.org/record/1135864">http://zenodo.org/record/1135864</a>
Desarrollo de un centro virtual de comercialización para la pyme calzado “Arita”
No full text1. Introducción. --2. Planteamiento de la Propuesta de Trabajo. --3. Marco Teórico. --4. Metodología. --5. Resultados. --6. Conclusiones y Recomendaciones.El presente proyecto de investigación y desarrollo tiene como objetivo aprovechar de la presencia física que dispone la PYME calzado Arita, para desarrollar un centro virtual de comercialización para dicha PYME, con la finalidad de integrar las TIC a sus procesos de comercialización. El trabajo investigativo evidencia como problema más representativo la no integración de las TIC en los procesos de comercialización que llevan la gran mayoría de socios de la Asociación de calzado 5 de Junio. El estudio conceptual analiza la evolución del comercio electrónico (CE), los diferentes enfoques en las definiciones, los elementos básicos de una tienda virtual así como el mercado digital, aspectos que permiten establecer parámetros a valorar en cuanto a los conocimientos de comercialización mediante el diseño de instrumentos empíricos como la encuesta y a través de la entrevista se identifica los requerimientos para el desarrollo del centro virtual de comercialización para la PYME calzado Arita (CVCCA). Entre los resultados relevantes en la fase diagnostico se muestra como pese al poco conocimiento sobre el funcionamiento del CE por parte de los agremiados de la Asociación de calzado 5 de Junio existe entre ellos una notable aceptación por expandir sus negocios a medios digitales como el internet. La revisión del estado del arte y los resultados obtenidos, plantean como producto final el desarrollo del CVCCA a partir de la selección de un CMS que permita diseñar los elementos básicos que una tienda virtual debe poseer.Pontificia Universidad Católica del Ecuador, Dirección de Investigación y PosgradosMagíster en Gerencia Informátic
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