21,526 research outputs found
Age-dependent health status and song characteristics in the barn swallow
No full textBird song has been hypothesized to evolve, partly, to signal health status of males, and song features should therefore correlate with parasite load. Immune function, parasitism, and secondary sexual characters can, however, differ between age classes, and any apparent relationship between song and parasite loads can be the result of systematic age effects. We tested for an age-dependent relationship between sexually selected characters and measures of parasitism in a Spanish population of the barn swallow Hirundo rustica. A comparison across age classes revealed that chewing lice load, song duration, mean peak amplitude frequency of songs, and tail length differed significantly between yearlings and adults. In a longitudinal analysis, we found significant evidence for mean peak amplitude frequency of songs, tail length and chewing louse parasitism, and a nonsignificant tendency for song duration to change with age of an individual. We found a significant association between song duration and chewing louse load and between hematocrit and peak amplitude frequency of the rattle, the typical harsh terminal syllable. In tests for associations between song traits and health status, while controlling for age, age and chewing louse load were independently related to song duration. We found a significant relationship between pairing success and song duration, implying that females may use this song trait in their choice of parasite-free males. Although the song of the barn swallow may provide information about both male age and parasite resistance, signaling of health status appears to be independent of age effects, in accordance with the theory of parasite-mediated sexual selection, suggesting that male signals can be used as reliable indicators of parasitism. Copyright 2005.age; barn swallow; bird song; chewing louse; hematocrit; sedimentation rate
Author Identification from Song Lyrics
No full textMachine Learning (ML) tools have been used extensively in a wide variety of domains
recently. Due the enormous amount of data being produced, machine learning techniques
are being heavily used to make sense of data & derive meaningful results. Using machine
learning tools, we can turn the data into knowledge.
Music is one of the truest forms of art. Bangladesh has a great history of music with a
great tradition of song writing over centuries. Authorship attribution is the way of
identifying the author from a linguistic corpus.
This paper demonstrates a guideline to identify the author of a Bengali song from the
lyrics of that song using machine learning. This research work presents the first work on
machine learning approach for author attribution from the lyrics of a song. Here six
methods of machine learning are used for the author identification and high accuracies
have been achieved from these methods. It is observed that Naïve Bayes method provides
higher accuracy in comparison with the other methods
Song Chunfang lun ju er ji.
No full text宋春舫著譯.附: 漢譯歐美劇單行本目錄.Song Chunfang zhu yi.Fu: Han yi Ou Mei ju dan xing ben mu lu
Song
No full textAuthor attribution from Rudolph, 240. Printed on yellow paper with black ink. Set to the tune of "Happy land of Canaan". First line "You Rebels come along and listen to my song"
1.5 mu m vertical-cavity surface-emitting lasers utilising low loss AlxOy/GaAs mirrors
No full textLow threshold power vertical-cavity surface-emitting lasers are fabricated by using low loss AlxOy/GaAs mirrors as output couplers. A 5 mu m-aperture laser with a low threshold CW pump power of 1.4 mW at room temperature and a 16 mu m-aperture laser operating in CW mode up to 64 degrees C are produced
Xi ju chun qiu: wu mu qi chang.
No full text作者夏衍, 宋之的, 于伶.五幕劇zuo zhe Xia Yan, Song Zhide, Yu Ling.Wu mu ju
Recommended from our members
Expression of GABAA receptor subunit genes in the avian song system and their role in learning and memory
No full textγ-aminobutyric acid type A (GABAA) receptors are the primary mediators of inhibitory neurotransmission in the brain. In avian systems, 14 GABAA receptor subunits (α1-6; β2-β4; γ1, 2 and 4, δ and π) have been identified. These assemble into pentameric transmembrane structures with an intrinsic chloride-selective pore and are involved in the modulation of learning and memory. Following imprinting training in the one-day old chicken, mRNA encoding the GABAA receptor γ4 subunit is significantly reduced in learning-relevant brain regions indicating a role for receptors comprising this subunit in learning and memory. The zebra finch (Taenopygia guttata) song system has long since been used as a paradigm for studying the underlying molecular mechanisms of learning and memory due to the discrete nature of song, the song system and established stages in song development. The avian brain displays many comparable structures and pathways to mammalian systems and there are striking parallels between birdsong and speech production in humans hence the fundamental neuronal mechanisms are similar. Despite major developments towards understanding the anatomical and electrophysiological properties of various song-system nuclei, the nature of the underlying molecular and biochemical/genetic architecture remains largely unknown. Electrophysiological and pharmacological techniques have localised GABAA receptors in the song system and more recently the spatial distribution of γ4-subunit mRNA has been mapped, producing striking results
Reaction of CpWOs3(CO)(11)(mu(3)-CTol) with H2S: mu-alkylidene and mu(3)-alkylidyne WOs3 cluster complexes containing a sulfido ligand
No full textInitial decarbonylation of CpWOs3(CO)(11)(mu(3)-CTol) (1; Cp = eta(5)-C5H5, Tol=p-C6H4Me) with Me3NO/MeCN followed by a reaction with H2S produces a sulfido-alkylidyne complex as a major product, CpWOs3(CO)(10)(mu(3)-CTol)(mu(3)-S) (2, 48%), and two hydrido-sulfido -alkylidene complexes as minor products, CpWOs3(CO)(10)(mu-CHTol)(mu(3)-S)(mu-H) (3, 12%) and CpWOs3(CO)(9)(mu- CHTol)(mu-S)(mu-H) (4, 14%) by S-H bond activations of H2S. Decarbonylation of 3 with Me3NO/CH2Cl2 affords complex 4 in 67% yield. Compounds 2, 3 and 4 have been isolated as crystalline solids and have been characterized by spectroscopic (IR, MS, H-1 and C-13-NMR) and analytical data. The structures of 2, 3 and 4 have been determined by single-crystal X-ray diffraction studies. Complexes 2 and 3 are based upon a 'butterfly' WOs3 metal core of a 62 valence electron (VE) with a respective dihedral angle of 100.60(7) and 83.82(8)degrees between the W-Os(3)-Os(1) and W-Os(3)-Os(2) planes. Each molecule consists of three Os(CO)(3) units, a CpW(CO) fragment and a triply bridging sulfide ligand across the open Os(1)-W-Os(2) triangular face. The mu(3)-alkylidyne in 2 caps unsymmetrically the outer face of the W-Os(1)-Os(3) 'wing' triangle. For 3, the mu-alkylidene ligand bridges the 'hinge' W-Os(3) bond and the mu-hydride ligand is supposed to span the W-Os(1) linkage. Complex 4 contains a tetrahedral WOs3 core associated with a 60 VE. The mu-sulfido and mu-alkylidene ligands bridge the W-Os(2) and W-Os(1) edges, respectively. The mu-sulfido ligand is involved in a W=S: --> Os bridge (W-S = 2.21(2) and Os(2)-S = 2.47(2) Angstrom). The mu-hydride ligand is believed to span the elongated Os(2)-Os(3) edge. The tolyl substituent on the alkylidene C is oriented away from the mu-sulfido ligand. (C) 1998 Elsevier Science S.A. All rights reserved.We are grateful to the Korea Science and Engineering Foundation (KOSEF) for financial support of this research. Prof J.R. Shapley at the University of Illinois, Urbana is thanked for help in obtaining mass spectra
The Singer or the Song? Developments in Performers' Rights from the Perspective of a Cultural Economist
No full textOver the last century, performers gradually acquired statutory protection of their economic and moral
rights. These rights are not copyright in the legal sense but neighboring rights and until recently, they
were mainly remuneration rights that are collectively administered. With the WPPT (WIPO
Performers and Phonograms Treaty), performers now have individual exclusive rights for digital
performances; this leads to the question: what has motivated this change – is it a change in the
perception of the value of performer or a change brought about by the changing technology of copying or,
indeed, a change that reflects different economic costs and benefits? The paper discusses the role of
copyright law as an incentive to performers and asks if the economic role of the performer is so different
from that of the author. The conclusion is that a complex interaction of the legal regulations, economic
conditions and institutional arrangements for administering these new rights will determine the outcome
Chrysodema Qi & Ai & Song 2022
No full textKey to Chrysodema species from China 1. Pronotal principal impressions small to moderately large, not reaching lateral margin of pronotum, sometimes only linear or nearly absent......................................................................................... 2 - Pronotal principal impressions large and rounded, reaching to lateral margin of pronotum, which forms a sharp carina......6 2. Elytra with strongly convex narrow and sharp costae....................... C. (C.) eximia berliozi Descarpentries, 1948 - Elytra nearly flat or slightly convex and without sharply delimited costae......................................... 3 3. Each elytron without transverse impressions............................................................... 4 - Each elytron with 1 or 2 transverse large but shallow impressions................................................ 5 4. Punctation on each elytron always regular, forms 4 wide longitudinal intercostal intervals; a large elliptical principal impression protrudes from lateral impression to 3 rd intercostal interval at apical third of each elytron..... C. (C.) hainanensis sp. nov. - Punctation on each elytron generally irregular or weakly regular; elytral lateral impression without any transverse extended impression........................................................ C. (C.) lewisii nakatai Frank & Sekerka, 2020 5. Labrum, maxillae and labium including palpi pale brown........................... C. (C.) aurostriata Saunders, 1866 - Labrum, maxillae and labium including palpi yellow............................... C. (C.) tonkinea Kerremans, 1909 6. Legs with a strong reddish tinge, dorsal surface dark blue with golden green punctures.... C. (P.) yasumatsui Kurosawa, 1954 - Legs golden green with a slight reddish tinge or simply greenish tinges on green of basal coloration, dorsal surface nearly black with golden green punctures............................................................................. 7 7. Legs golden green with a slight reddish tinge.......................... C. (P.) dalmanni dalmanni (Mannerheim, 1837) - Legs simply greenish tinges on green of basal coloration................ C. (P.) dalmanni penghuensis Hattori & Ong, 202Published as part of Qi, Zhi-Hao, Ai, Hong-Mu & Song, Hai-Tian, 2022, Notes on the genus Chrysodema from China (Coleoptera: Buprestidae: Chrysochroinae), with one new species and one new record, pp. 355-368 in Zootaxa 5099 (3) on pages 366-367, DOI: 10.11646/zootaxa.5099.3.4, http://zenodo.org/record/607894
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