16,114 research outputs found
The micro-vertex-detector of the PANDA experiment at Darmstadt
No full textThe "AntiProton ANnihilations at DArmstadt"-experiment, short PANDA, is one of the main experiments of the "Facility for Antiproton and Ion Research" (FAIR) which replaces and extends the existing GSI-facility at Darmstadt.The main physics goals at the beginning of the experiment in 2012 will be precision spectroscopy of charmonium states, an establishment of gluonic excitations, the search for modifications of meson properties in the nuclear medium and precision gamma-ray spectroscopy of single and double hypernuclei.For many of these physics goals an identification of D-mesons via the detection of a secondary vertex with a decay length in the order of 100 mu m is essential. Therefore, a special micro-vertex-detector (MVD) is foreseen which allows a precise tracking of all charged particles.Several different technology options from monolithic active pixels to hybrid pixel detectors are on the market. Unfortunately, none of these techniques fully meets the requirements of the PANDA experiment. Different technologies are compared with respect to the requirements of PANDA. In addition, a possible design of the MVD will be shown, which features a combination of hybrid pixel modules, whose layout might be adopted from ATLAS or other LHC experiments, for the inner layers and silicon strip detectors for the outer layers. (c) 2006 Elsevier B.V. All rights reserved
The micro-vertex-detector of the PANDA experiment at FAIR
No full textThe "AntiProton ANnihilations at DArmstadt"-experiment, PANDA, is one of the main experiments of the "Facility for Antiproton and Ion Research" (FAIR) which replaces and extends the existing GSI-facility at Darmstadt.The primary physics goals include precision spectroscopy of charmonium states, establishment of gluonic excitations, the study of modifications of meson properties in the nuclear medium, and precision gamma-ray spectroscopy of single and double hypernuclei.For many of these physics' goals an identification of D-mesons via the detection of a secondary vertex with a decay length in the order of 100 mu m is essential. Therefore, a special micro-vertex-detector (MVD) is foreseen which allows precise tracking of all charged particles.A hybrid pixel solution was chosen as a baseline concept for the Panda MVD to accommodate the high radiation dose and the required time resolution. To clarify the requirements for the hybrid pixel detector, a Geant4 based simulation was performed using a detector geometry optimized for low radiation length. The design of the detector and the simulation results will be presented in this paper. (c) 2006 Elsevier B.V. All rights reserved
Dancing made easy,
No full textThis is an expanded version of Coll's book that was originally published c. 1919. Beginning with an account of dance history ranging from the ancient Greeks to late nineteenth-century dance, Coll declares that some of "most up to the minute dances" include the Carter Waltz and the Schottisch Espagnole. The author also discusses foxtrot variations and the Virginia Reel, and provides some cotillon figures (also known as the German). The dances described by Coll were long out of fashion by 1922
Simulationsergebnisse der Anforderungen an den Micro-Vertex-Detektor des PANDA-Experimentes
No full text
Araragi panda subsp. sichuanensis Hsu & Li 2019, subsp. nov.
No full textAraragi panda sichuanensis Hsu & Li, subsp. nov. Type materials. Holotype. ♂: CHINA: SICHUAN Prov., Yaan Shi, Baoxing Xian, 1400 m, reared from Cyclocarya paliurus, emgd. 9. V. 2019, Coll. A. Li & Y. F. Hsu (IOZ). Paratypes. 2♂ 6♀, same locality as for holotype, reared from Cyclocarya paliurus, emgd. 9. V/ 12. VI. 2019, Coll. A. Li & Y. F. Hsu; 2♂ 1♀, VII. 26. 2018, Coll. Y. F. Hsu, 7♂ 7♀, 3–31. VIII. 2018, Coll. A. Li. (IOZ, FNNR, NTNU). Male (Figs. 1–2): FL 16.5–21.3 mm (mean 19.5± 1.2 mm, n=12); female (Figs. 3–4): FL: 17.5–21.3 (mean 19.9±1.0 mm, n=14). Diagnosis. The distinction between subspecies sichuanensis Hsu & Li, subsp. nov. and nominotypical A. panda is mainly on markings of wing undersides: 1) M1 and M2 spots of the distal band of central symmetry system on forewing underside are detached from R5 spot in the nominotypical subspecies, whereas they are conjoined with R5 spot in ssp. sichuanensis; 2) proximal band of central symmetry system is large, with width much broader than cell bar in the nominotypical subspecies, whereas that is small, narrower or as wide as cell bar in ssp. sichuanensis; 3) three spots of the proximal band of central symmetry system near wing base on hindwing underside are conjoined into a bar in the nominotypical subspecies, whereas they are separated, notably the posterior spot, in ssp. sichuanensis; 4) ground color of wing undersides is overlaid with prominent gray scalings in ssp. sichuanensis, whereas it is paler with gray scalings poorly developed in the nominotypical subspecies. Ssp. yunnanensis is different from ssp. sichuanensis and the nominotypical subspecies by the greatly reduced proximal band of central symmetry system on forewing underside. Hostplant. Cyclocarya paliurus (Juglandaceae). Bionomics. Adults were observed staying on foliage of the hostplants, descending to understory vegetation when sunshine was intensive with high temperature in fair weather. Ova (Figs. 5–6) were mostly found on naked leaflet in dormancy, but occasionally on small twig. Green larva (Fig. 7) devours young tissue of the hostplant such as new buds and soft leaves. Brown pupa (Fig. 8) is girdled. Distribution. Araragi panda sichuanensis Hsu & Li, subsp. nov. has been so far found in a few canyons in Baoxing area in Sichuan Province, belonging to north-south oriented Qionglai Mountain Range. This mountain range is approximately 400 kilometers distant from east-west oriented Qingling Mountain Range in Gansu and Shaanxi Province, where the nominotypical subspecies of A. panda inhabits.Published as part of Hsu, Yu-Feng & Li, Ai-Min, 2019, A new subspecies of Araragi panda Hsu & Chou (Lepidoptera, Lycaenidae, Theclini) from Sichuan, western China, pp. 296-300 in Zootaxa 4701 (3) on pages 297-298, DOI: 10.11646/zootaxa.4701.3.6, http://zenodo.org/record/355806
Ornebius panda He 2019
No full textOrnebius panda He, 2019 Fig. 10 Ornebius panda He, 2019: 544–550. Holotype. China: Male, Guangxi, Baise, Jingxi, Wuling, 19th April 2019, He Zhuqing coll. Materials examined. China: 2 males, Guangxi, Jingxi, Longbang, 2nd May 2019, Ma Libin and Zhang Tao coll. (SNNU). Description. Male. Body form typical of the genus. Body flat with scales, pubescent on legs and cerci. Frontal rostrum swollen, little broader than antennal scape, maxillary palpus with distal three segments elongate and fifth segment somewhat widened. Pronotum longer than width with lateral margin broadening posteriorly; posterior margin convex, covering a portion of the base of mirror. Fore tibia internal tympanum minute, rounded; without external tympanum. Dorsal margin of hind tibia is serrate with two rows of denticles with about 24–26 teeth each. Cerci elongate. Male genitalia not visible externally. Genitalia: Male phallic complex with the medial valve curved to a spiral in basal part with its base forming an axis in the centre of the spiral (Fig. 10C). In ventral view, internal sclerite of medial valve with two elongated and straight narrow rods (Fig. 10B), gently curved dorsally at the base in lateral view (Fig. 10C). Ventral median lobe little shorter than epiphallus and surpass the apex of ejaculatory duct (Figs 10D & E). Colouration. Antennae yellow, head and pronotum brown, legs brown with white at the base. Tegmen faint yellow with apical part and lateral field black. Four small black spots on each dorsum of abdominal tergite, cercus yellowish. Ovipositor yellowish. Remarks. This colour pattern is similar to O. citrus, O. peniculatus, O. pullus and O. tuberculatus from Thailand and Kalimantan, but it is different from the former in male genitalia distinctly.Published as part of He, Zhixin, Ma, Ge, Long, Jifeng, Wang, Yan, Zhang, Tao & Ma, Libin, 2021, Taxonomy of scaly crickets (Orthoptera: Mogoplistidae: Mogoplistinae) from China: five new species groups and three new species of the genus Ornebius Guérin-Méneville, 1844, pp. 72-94 in Zootaxa 4942 (1) on pages 83-84, DOI: 10.11646/zootaxa.4942.1.3, http://zenodo.org/record/459613
Quantifying the evidence for co-benefits between species conservation and climate change mitigation in giant panda habitats
No full textConservationists strive for practical, cost-effective management solutions to forest-based species conservation and climate change mitigation. However, this is compromised by insufficient information about the effectiveness of protected areas in increasing carbon storage, and the co-benefits of species and carbon conservation remain poorly understood. Here, we present the first rigorous quantitative assessment of the roles of giant panda nature reserves (NRs) in carbon sequestration, and explore the co-benefits of habitat conservation and climate change mitigation. Results show that more than 90% of the studied panda NRs are effective in increasing carbon storage, with the mean biomass carbon density of the whole NRs exhibiting a 4.2% higher growth rate compared with lands not declared as NRs over the period 1988-2012, while this effectiveness in carbon storage masks important patterns of spatial heterogeneity across the giant panda habitats. Moreover, the significant associations have been identified between biomass carbon density and panda's habitat suitability in similar to 85% NRs and at the NR level. These findings suggest that the planning for carbon and species conservation co-benefits would enhance the greatest return on limited conservation investments, which is a critical need for the giant panda after its conservation status has been downgraded from "endangered" to "vulnerable".Forestry Department of Sichuan Province; The Nature Conservancy (TNC)SCI(E)ARTICLE
- …
