109,978 research outputs found
Automorphism groups of Wada dessins and Wilson operations
No full textDessins d'enfants (children's drawings) may be defined as hypermaps, i.e. as bipartite graphs embedded in compact Riemann surfaces. They are very important objects in order to describe the surface of the embedding as an algebraic curve. Knowing the combinatorial properties of the dessin may, in fact, help us determining defining equations or the field of definition of the surface. This task is easier if the automorphism group of the dessin is "large". In this thesis we consider a special type of dessins, so-called Wada dessins, for which the underlying graph illustrates the incidence structure of points and of hyperplanes of projective spaces. We determine under which conditions they have a large orientation-preserving automorphism group. We show that applying algebraic operations called "mock" Wilson operations to the underlying graph we may obtain new dessins. We study the automorphism group of the new dessins and we show that the dessins we started with are coverings of the new ones.Dessins d'enfants (Kinderzeichnungen) wurden zuerst von Grothendieck (1984) als Objekte eingeführt, die sehr einfach, aber sehr wichtig sind, um kompakte Riemannsche Flächen als glatte algebraische Kurven über einem Zahlenkörper zu beschreiben. Dessins d'enfants können durch ihre Walsh-Darstellung definiert werden und entsprechen bipartiten Graphen, die in Riemannschen Flächen eingebettet sind. Ein grundlegendes Problem ist es, wie man aus den kombinatorischen Eigenschaften des Dessins auf die algebraischen Eigenschaften der Fläche, wie z.B. auf definierende Gleichungen und auf den Definitionskörper, schließen kann. Die Aufgabe ist normalerweise sehr schwierig, aber sie ist einfacher, wenn die Automorphismengruppe des Dessins besonders "groß" ist. In dieser Arbeit beschäftigen wir uns mit einem speziellen Typ von Dessins, mit sogenannten Wada-Dessins. Der zugrundeliegende Graph stellt die Inzidenzstruktur von Punkten und von Hyperebenen projektiver Räume dar. Wir bestimmen, unter welchen Bedingungen die orientierungserhaltende Automorphismengruppe "groß" ist. Wir zeigen, daß sich neue Dessins aus den ursprünglichen konstruieren lassen, wenn wir auf dem zugrundeliegenden Graphen sogenannte "mock" Wilson-Operationen anwenden. Wir analysieren die Automorphismengruppe der neuen Dessins und zeigen, daß die ursprünglichen Dessins Überlagerungen der neuen Dessins sind
Giappone e Italia: le arti del dialogo
No full textUno sguardo ampio e interdisciplinare su due universi culturali da lungo tempo profondamente interessati l'uno dell'altro: Italia e Giappone e, in senso più ampio, Oriente e Occidente. Le arti, e i linguaggi specifici attraverso i quali si producono e offrono, hanno fornito il terreno comune per il confronto e per constatare l'impossibilità di tracciare confini netti e impermeabili tra gli universi culturali indagati o, ancora, di stabilire precedenze e gerarchie di indagine e decodifica
I teatri puri impazziscono: scene di sconfinamento teatrale dal Giappone e ritorno
No full textIl titolo del contributo cita apertamente, nella sua parte iniziale, quello della versione italiana del fortunato libro di James Clifford "I frutti puri impazziscono. Etnografia, letteratura e arte nel XX secolo". Tra le più raffinate e acute critiche all’antropologia classica e alla sua retorica narrativa, l’ossatura portante dell’opera cliffordiana si snoda –semplificando alquanto – lungo la disamina dell’asse identità-autenticità-autorità applicate al concetto di cultura.
Nel convulso frangente di mutamento socio-culturale avvenuto con la restaurazione Meiji (1868) anche il Giappone, apertosi all’Occidente e lanciato nella costruzione di un moderno stato nazionale, sentì l’esigenza di dotarsi di simboli e linguaggi capaci di incarnare e comunicare – tanto ai giapponesi quanto agli stranieri, ossia l’Altro – i nuovi valori fissando, al contempo, un’immagine distillata e istituzionale della cultura autoctona che ricalcasse il profilo ideale e fisico dei confini dell’arcipelago.
I teatri di tradizione – nō, kabuki, bunraku e kyōgen – in tempi e modi diversi furono parte integrante di tale meccanismo di costruzione identitaria, un’identità sentita tanto più autentica quanto più capace di raccontare all’Altro il ‘vero’ Giappone: la natura composita e al tempo stesso sintetica dei teatri classici, unitamente alla loro antica tradizione, li resero linguaggi assai adatti allo scopo.
La sempre maggiore frequenza dei contatti con l’Altro, però, creò anche i presupposti per forme di negoziazione culturale in senso bilaterale. Tali presupposti portarono alla nascita, nell’ambito dei teatri giapponesi classici, ‘puri’, di creazioni sceniche ibride, ‘impazzite’ se confrontate col modello tradizionale. Rispetto alla più ampia scena teatrale mondiale, invece, condussero all’emersione di infinite ipotesi e realizzazioni creative volte a tradurre la lezione giapponese secondo paradigmi e orizzonti estetici altri. Un esempio, credo, che può ben testimoniare la sublimazione di un preteso confine culturale in un più ampio e poroso orizzonte interculturale
ON A RESULT OF KIYOTA, OKUYAMA AND WADA
No full textM. Kiyota, T. Okuyama and T. Wada recently proved that each 2-block of a symmetric group Σ_n contains a unique irreducible Brauer character of height 0. We present a more conceptual proof of this result
ASCIDIANS COLLECTED BY MESSRS. RENZI WADA AND SEIZI WADA FROM THE PEARL-OYSTER BED IN THE ARAFURA SEA IN 1940
No full textThe present material consists of 27 species collected by Mr. RENZI WADA of the former Nan'yo Pearl Company and Mr. SEIZI WADA, an associate of the former Palao Tropical Biological Station, from the pearl-oyster bed off Melville in the Arafura Sea during the period from September to November of 1940. I express here my hearty thanks to Messrs. R. W ADA and S. W ADA for their kindness in offerring me the present precious material. I am also very grateful to Prof. T. KOMAI for his kind guidance and incessant encouragement. The present work is a part of the study progressed by the financial aid from the Ministry of Education
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Language lateralization using fRM: Preliminary report and correlation with the Wada test
No full textFunctional magnetic resonance (fMR) is an acknowledged tool for studying cortical areas involved in motorial, sensitive, sensorial as well cognitive functions. This is possible on account of signal changes arising in the cerebral cortex where modification in blood flow and oxygenation take place passing from activated to the resting state (BOLDc). Wada test represent, up to now, the gold standard for measuring language lateralization. Purpose of this study was to evaluate the reliability of fMR as an alternative tool to the Wada test for correctly assess language lateralization
Proceedings of the Ninth Annual Joint Research Meeting CCNT / CSIRO / DPIF / WADA
No full textAbstracts
Overview of WADA involvement in cropping the Kimberley - McGhie, D.A. WADA
Overview CSIRO Division Tropical Crpos and Pastures - Winter, W.H. CSIRO
An overview of a program for developing a comprehensive crop yield simulation in the tropics - McCown, R. CSIRO
Developing a family of crop models for SA using the CERES framwork - Carberry, P.S. CSIRO
Development of a model of the N cyle of crop-pasture rotations in the semi-arid tropic. - Dimes, J.P., McCowan, R.L. , Saffinga*, P.G. and Myers, R.J. CSIRO
Visual/Interactive CERES Models. - Hargreaves, J. and Carberry, P. CSIRO
The applicability of a Cercospora leaf spot simulation model to control of Cercospora in irrigated peanut crops. - Riley, I.T. WADA
Preliminary results from the Croplands Erosion Research Project (CERP) - Dilshad, M. CCNT
Preliminary results from the Croplands Erosion Research Project, Douglas-Daly - van Cuylenburg, M. CCNT
Progress in reducing the risk of poor emergence. - Abrecht, D.G. CSIRO
The effects of tillage system on soil physical characteristics and crop yield on a Fenton soil in the NT - Dalgliesh, N.P CSIRO
Effect of Tillage, Rotation and Nitrogen on the Growth and Nutrient Uptake of Maize and Soybeans. - Thiagalingam, K., Gould, N. and Watson, P. DPIF
Problems and Potential of Peanut Production in the Northern Territory - Flint, C. DPIF
The Effect of Surface Management on Growth and Yield of Soybean. - Bateman, R., and Berthelsen, J. DPIF
The Effect of Tillage, Rotation and Nitrogen on the Emergence and Establishment of Soybeans from 1984-88 - Gould, N., Thiagalingam,K. and Watson, P. DPIF
Overview of Entomology in the Ord River Irrigation Area - McFadden, P. WADA
Forage Sorghum - Irrigation Scheduling Requirements. - Shackles, R., Ellett, S., and Sherrard, J.H. WADA
Water management of Maize in the ORIA - Sherrard, J.H, Shackles, R. and Ellett, S. WADA
Cropping in the Douglas Daly - 6 years on. - Bateman, R. DPIF
Progress in the Development of Late Maturing Photoperiod Sensitive Mungbeans for the Northern Territory. - Yeates, S. DPIF
Summary - Kenaf/Fibre Crop Investigations in the NT. Sturtz, J. DPIF
Preliminary Investigation of the Presence of Vesicular Arbuscular Mycorrhizae (VAM) in a heavy and a light Tippera Soil. - Thiagalingam, K., and Watson, P. DPIF
Development of new crops for irrigated cropping in northern Western Australia. Bonnardeaux, J. WADA
Plantaqo ovata research and commercial developments. Riley, I.T. WADA
Banana Yield Estimation - Dealing with management scale research. Gardiner, H.G.
Evaluation of table grape production in the tropics. - Toohill, B. WADA
Recent developments in grain sorghum breeding. - Done, A. CSIRO
Maize Production in the ORIA. Sherrard, J., Shackles, R., and Ellett, S. WAD
Peltonotus adelphosimilis Jameson and Wada 2004, n. sp.
No full text<i>Peltonotus adelphosimilis</i> Jameson and Wada, n. sp. <p>(Figs. 36, 37a–c, 67)</p> <p>Type Material. Holotype male housed at WADA with following label data and male genitalia mounted beneath specimen: a) " Mt. Bawang, West Kalimantan, BORNEO, X 1990 " (type face), b) "Kaoru WADA Col. No. 028­b" (typeface and handwritten, yellow label), c) our holotype label. Allotype female housed at FUJI with following label data: a) " Mt. Bawang, BORNEO INDONESIA 1993. AUG. N. Nishikawa­leg. " (type face), b) "Fujioka­Collection Peltonotus­T­1" (typeface and handwritten, yellow label), c) our allotype label.</p> <p>Description. Holotype male. Length 20.3 mm. Widest width 9.4 mm. Color: Clypeus, pronotum, scutellum, elytra, propygidium, pygidium, and venter dark brown; frons black or castaneous; elytra with or without iridescent bloom. Head: Surface of frons impunctate to sparsely punctate (base to mid­disc), densely punctate (mid­disc to apex); punctures simple, multisetigerous; setae short (1–20+ per puncture) and moderately long (1–2 per puncture). Surface of clypeus densely punctate; punctures simple, multisetigerous; setae short (1–20+ per puncture) and moderately long (1–2 per puncture). Clypeus laterally weakly bowed, apex truncate, corners square, beaded; bead weakly arcuate posteriorly. Labrum deeply, narrowly emarginate at middle. Mandibles rounded laterally, inner apex with 2 teeth. Mentum with apical half rounded, notched at middle; palpomere 2 not obviously flattened dorsoventrally, 1.5 times width of palpomere 1, sparsely setose; setae moderately long, rufous, not curled at apex, not flattened. Maxilla: mala lacking lamellate setal brush; stipes with setae sparse, long, not flattened, not curled at apex; palpomere 2 with weak internomedial bump. Antennal club subequal to segments 2–7. Pronotum: Bead lacking anterior to scutellum. Surface moderately densely punctate; punctures simple, multisetigerous laterally; setae minute (1–7 per puncture) and short (1 per puncture). Lateral margin lacking long setae. Elytral sutural length: About 4.0 times length of scutellum. Elytron: Surface with 5 poorly developed, punctate, longitudinal striae between suture and humerus; punctures moderate in size, moderately dense, some multisetigerous; setae minute (1–5 per puncture). Intervals with similar sculpturing. Propygidium: Surface moderately densely punctate with a row of setose punctures at apex; punctures simple, unisetigerous; setae short, rufous. Pygidium: Surface densely punctate and shagreened; punctures ocellate, mixed small and moderately large, multisetigerous; setae minute (1–7 per puncture) and short (1 per puncture). Venter: Prosternal keel subtriangular; apex projecting anteriorly at about 90° with respect to ventral plane; apex produced to middle of protrochanter, rounded. Legs: Foretibia of male bidentate; lateral margin with foretarsomeres 1–4 with apices expanded, dorsal and ventral apices clothed with dense, short setae; protarsomere 5 in male with apical protuberance (Fig. 36). Foreclaws with inner claw sickle­shaped, about 4 times thicker than outer claw; outer claw simply arcuate, about 1/3 the length of inner claw; empodium bulbous at base. Meso­ and metatibial claws of male with 2 setae, claws angled toward venter, about 2/3 length of metatarsomere 5. Metatibia of male with apical spurs nearly straight; ventral spur produced to middle of metatarsomere 1, dorsal spur produced to middle of metatarsomere 2. Parameres: Fig. 37a–c.</p> <p>Allotype Female. Differs from the holotype in the following respects. Length 18.9 mm. Widest width 8.9 mm. Color: Head, pronotum, scutellum, propygidium, pygidium, and venter castaneous; elytra castaneous with iridescent bloom. Head: Surface of frons moderately densely punctate (base) to densely punctate (mid­disc to apex); punctures simple, multisetigerous; setae short (1–12 per puncture) and moderately long (1 per puncture). Pronotum: Surface moderately densely punctate, punctures simple, lacking setae laterally. Elytron: Epipleuron of female in ventral view expanded, deeply incised at sternite 3; in dorsal view, expansion well­developed (similar to Fig. 61). Legs: Foreclaws 1/2 length of foretarsomere 5, angled toward venter.</p> <p> Diagnosis. Based on shared characters, <i>P. adelphosimilis</i> most closely resembles <i>P. similis</i>. The two species are separated based on the form of the labrum (deeply, narrowly emarginate in <i>P. adelphosimilis</i> [e.g., Fig. 14]; broadly emarginate in <i>P. similis</i>), form of foretarsomere 5 in males (with apical protuberance in <i>P. adelphosimilis</i> [Fig. 36]; with median protuberance in <i>P. similis</i> [Fig. 35]), and form of the female epipleuron (incised area round in <i>P. adelphosimilis</i>; ovate in <i>P. similis</i> [Fig. 61]). The following characters will separate <i>P. adelphosimilis</i> from other <i>Peltonotus</i> species: mandibles of male and female rounded laterally, inner apex with 2 teeth; mentum with apical half rounded, palpomere 2 not obviously flattened or greatly enlarged and lacking curled setae; mala lacking lamellate setal brush; stipes with setae sparse and not curled at apex; form of female epipleuron (dorsal and ventral views); elytra with multisetigerous punctures; foretarsomere 5 of male subequal in length to tarsomere 5 with medial protuberance; foretarsomeres 1–4 with apices expanded, dorsal and ventral apices clothed with dense, short setae; dorsal metatibial spur produced to middle of metatarsomere 2, nearly straight in males.</p> <p> Etymology. The species epithet, <i>adelphosimilis</i>, is derived from the Greek word for near kinship, twin, or brother (<i>adelphos</i>). The combination, <i>adephosimilis</i>, refers to the near kinship of this species with <i>P. similis</i>.</p> <p>Distribution (Fig. 67). West Kalimantan Province, Bornean Indonesia.</p> <p>Locality records (2 specimens) from FUJI, WADA.</p> <p>BORNEAN INDONESIA. West Kalimantan Province (2): Mt Bawang.</p> <p>Temporal Data. August (1), October (1).</p> <p> Remarks. Based on shared characters, <i>P. similis</i> and P. <i>adelphosimilis</i> are sister species. They differ in only three character states (form of the male foretarsomere 5, form of the labrum, and form of the female epipleuron). We considered that the character states observed in <i>P. adelphosimilis</i> may be intraspecific variation, but the two species also appear to be geographically isolated: <i>P. similis</i> occurs in the Crocker Range in Sabah while <i>P. adelphosimilis</i> occurs in Boven Kapuas Mountains in West Kalimantan. Geographic isolation in addition to the character state differences led us to the conclusion that these are two distinct taxa. Additional specimens of both <i>P. similis</i> and <i>P. adelphosimilis</i> will corroborate or refute this hypothesis.</p>Published as part of <i>Jameson, Mary Liz & Wada, Kaoru, 2004, Revision of the genus Peltonotus Burmeister (Coleoptera: Scarabaeidae: Dynastinae) from Southeastern Asia, pp. 1-66 in Zootaxa 502 (1)</i> on pages 14-16, DOI: 10.11646/zootaxa.502.1.1, <a href="http://zenodo.org/record/5030148">http://zenodo.org/record/5030148</a>
Batch-Online Semi-Blind Source Separation Applied to Multi-Channel Acoustic Echo Cancellation
No full textSemi-blind source separation (SBSS) is a special case of the well-known blind source separation (BSS) when some partial knowledge of the source signals is available to the system. In particular, a batch adaptation in the frequency domain based on independent component analysis (ICA) can be effectively used to jointly perform source separation and multi-channel acoustic echo cancellation (MCAEC) through SBSS without double-talk detection. Many issues related to the implementation of an SBSS system are discussed in this paper. After a deep analysis of the structure of the SBSS adaptation, we propose a constrained batch-online implementation that stabilizes the convergence behavior even in the worst-case scenario of a single far-end talker along with the non-uniqueness condition on the far-end mixing system. Specifically, a matrix constraint is proposed to reduce the effect of the non-uniqueness problem caused by highly correlated far-end reference signals during MCAEC. Experimental results show that high echo cancellation can be achieved just as the misalignment remains relatively low without any pre-processing procedure to decorrelate the far-end signals even for the single far-end talker case
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