2,525 research outputs found
Comb-making in medieval Novgard (950-1450). An industry in transition
No full textThis is a descriptive and analytical study of combs used for the hygienic and aestheticpurposes of cleaning, disentangling and arranging hair. Hundreds of these
products of professional artisans made out of skeletal materials and wood forming the basis of this research, derive from major excavation sites investigated during
1951-2000 in the medieval town of Novgorod (NW Russia). The site covers the extensive overall area of over 23,000sq.m bearing stratified waterlogged deposits
and structures dating from ca 950 to ca 1450. The objects in the assemblage are analysed typologically (survey of comb morphological traits) and contextually (chronological and spatial distributional analyses).As a result, chronological trends and stylistic changes are outlined with regard to combs themselves and their relationship to the immediate environment of the propertiesthey originate from, as well as to broader contexts of the town quarters(Ends), Novgorod as a whole and, to a certain extent, to the complex of Northern European urban communities. The combs are used for gaining insights into the
character and status of artisans through the analysis of aspects concerning the use of raw materials and application of specific techniques,and into the characterand status of consumers.It is demonstratedthat behind distribution patterns of particular comb
types lie such important spheres as craft specialization, trade, the movement of commodities and shifts of fashion, reflecting the changing demands of the consumer's market.
The comb study draws out some fundamental changesin the comb repertoire and the comb-making industry in its transition from the late Viking Age through the Middle
Ages. It can also be seen against the background of the developmentof urban society and, as'such, becomes a valuable source for further comprehensiveanalysis of the
character of life in medieval Novgorod, which involves assembling and correlating of relevant data
Lordomyrma bhutanensis Baroni Urbani, comb. n.
No full textLordomyrma bhutanensis (Baroni Urbani) comb. n. (Figures 25–27)Published as part of Branstetter, Michael G., 2009, The ant genus Stenamma Westwood (Hymenoptera: Formicidae) redefined, with a description of a new genus Propodilobus, pp. 41-57 in Zootaxa 2221 on page 48, DOI: 10.5281/zenodo.19006
On-chip quantum optical frequency comb sources
No full textIntegrated optical frequency comb sources, based on nonlinear microring resonators, can be used to generate complex quantum states. In particular, we achieved multi-photon and high-dimensional entangled quantum states, as well as their coherent control. © 2018 OSA
Maiestas vetus Webb & Viraktamath 2009, Comb. nov.
No full textMaiestas vetus (Knight) Comb. nov. (Fig. 35). Deltocephalus vetus Knight, 1975: 203–204, figs 20, 21, New Zealand. Recilia (Togacephalus) vetus (Knight), Day & Fletcher, 1994: 1204, Australia.Published as part of Webb, Michael D. & Viraktamath, Chandra A., 2009, 2163, pp. 1-64 in Zootaxa 2163 on page 1
Sticherus cubensis J. Gonzales, comb. nov.
No full textSticherus cubensis (Underw.) J.Gonzales, comb. nov. Dicranopteris cubensis Underwood (1907: 253). Type: — CUBA. Barbacoa: El Yunque, March 1903, Underwood & Earle 1416 (holotype NY!). Distribution and ecology: —Cuba, known only from the type. Ecology unknown.Published as part of Gonzales, Jasivia & Kessler, Michael, 2011, A synopsis of the Neotropical species of Sticherus (Gleicheniaceae), with descriptions of nine new species, pp. 1-54 in Phytotaxa 31 on page 23, DOI: 10.11646/phytotaxa.31.1.1, http://zenodo.org/record/489464
Frequency comb generation in the green using silicon nitride microresonators
No full textOptical frequency combs enable precision measurements in fundamental physics and have been applied to a growing number of applications, such as molecular spectroscopy, LIDAR and atmospheric trace-gas sensing. In recent years, the generation of frequency combs has been demonstrated in integrated microresonators. Extending their spectral range to the visible is generally hindered by strong normal material dispersion and scattering losses. In this paper, we report the first realization of a green-light frequency comb in integrated high-Q silicon nitride (SiN) ring microresonators. Third-order optical non-linearities are utilized to convert a near-infrared Kerr frequency comb to a broadband green light comb. The 1-THz frequency spacing infrared comb covers up to 2/3 of an octave, from 144 to 226 THz (or 1327-2082 nm), and the simultaneously generated green-light comb is centered around 570-580 THz (or 517-526 nm), with comb lines emitted down to 517 THz (or 580 nm) and up to 597 THz (or 502 nm). The green comb power is estimated to be as high as -9.1 dBm in the bus waveguide, with an on-chip conversion efficiency of -34 dB. The proposed approach substantiates the feasibility of on-chip optical frequency comb generation expanding to the green spectral region or even shorter wavelengths
(Powrie, 1870) n. comb. from the Midland Valley of Scotland
No full textFIG. 8. — Uraniacanthus curtus (Powrie, 1870) n. comb., NMS G.1891.92.249, holotype from Farnell: Magnified impressions of the body scales. Scale bar: 1 mm.Published as part of Newman, Michael J., Davidson, Robert G., Blaauwen, Jan L. Den & Burrow, Carole J., 2012, The Early Devonian Acanthodian Uraniacanthus curtus (Powrie, 1870) n. comb. from the Midland Valley of Scotland, pp. 739-759 in Geodiversitas 34 (4) on page 750, DOI: 10.5252/g2012n4a2, http://zenodo.org/record/538128
Maiestas coronata Webb & Viraktamath 2009, Comb. nov.
No full textMaiestas coronata (Melichar) Comb. nov. (Fig. 43) Deltocephalus coronatus Melichar, 1904: 45, Ethiopia. Type material examined. Syntypes: 1♂, 1♀, Ethiopia: Gonale, 12.iv.1901 (MMB). Remarks. The male genitalia of this species are illustrated for the first time. The aedeagus is very similar to angustisecta and lobata.Published as part of Webb, Michael D. & Viraktamath, Chandra A., 2009, 2163, pp. 1-64 in Zootaxa 2163 on page 4
Non 3-choosable bipartite graphs and the Fano plane
No full textIt is known that the smallest complete bipartite graph which is not 3-choosable has 14 vertices. We show that the extremal configuration is unique.PT: J; CR: BROWN E, 2002, MATH MAG, V75, P83 ERDOS P, 1979, CONGRESSUS NUMERANTI, V26, P155 FITZPATRICK SL, DMS854IR U VICT DEP HAUSON D, 1996, ARS COMBINATORIA, V44, P183 VIZING VG, 1976, DISKRET ANAL, V29, P3 WOODALL DR, 2001, LONDON MATH SOC LECT, V288, P269; NR: 6; TC: 0; J9: ARS COMB; PG: 15; GA: 948CQSource type: Electronic(1
Opsius smaragdinus Distant, comb. nov.
No full textOpsius smaragdinus (Distant) comb. nov. Cestius triradiatus Ahmed & Sultana. Syn. nov. Material examined. Pakistan: holotype 3 and 4 paratypes, Jhok, grass, 15.vi. 1987, Zahida; 13, paratype? (mislabeled as Scaphoideus triradiatus), Jhok, grass, 2.i. 1987, Zahida. Remarks. There is considerable confusion with respect to the original description of C. triradiatus (see remarks under O. versicolor).Published as part of Khatri, Imran & Webb, Michael D., 2010, The Deltocephalinae leafhoppers of Pakistan (Hemiptera, Cicadellidae), pp. 1-47 in Zootaxa 2365 on page 15, DOI: 10.5281/zenodo.19365
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