2,789 research outputs found
Narayanella, a new name for Narayana Subba Rao (hymenoptera : mymaridae)
No full textThe name Narayana was applied (Subba Rao, 1976) to a genus erected for the new species N. pilipes reared from the gaUs of Lagerstoemia flos reginae. Unfortunately the author overlooked the vulid and prior use of Narayana by Distant (1908). Narayana Distant was erected with rusticitatus as type-species (Issidae: Homoptera). Hence Narayana Subba Rao is a junior homonym which has to be replaced according to the rules of the International Zoological Nomenclature
Sensor Selection for Angle of Arrival Estimation Based on the Two-Target Cramér-Rao Bound
No full textSensor selection is a useful method to help reduce data throughput, as well as computational, power, and hardware requirements, while still maintaining acceptable performance. Although minimizing the Cramér-Rao bound has been adopted previously for sparse sensing, it did not consider multiple targets and unknown source models. In this work, we propose to tackle the sensor selection problem for angle of arrival estimation using the worst-case Cramér-Rao bound of two uncorrelated sources. To do so, we cast the problem as a convex semi-definite program and retrieve the binary selection by randomized rounding. Through numerical examples related to a linear array, we illustrate the proposed method and show that it leads to the natural selection of elements at the edges plus the center of the linear array. This contrasts with the typical solutions obtained from minimizing the single-target Cramér-Rao bound.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Signal Processing System
Sketch Studies and Lu Yen’s Harmony
No full textThis paper introduces the various types of music manuscripts and current issues in music sketch studies. It argues that the study of musical manuscripts is not simply the direct conversion of composition processes into music analysis. Nor is it limited to the function of providing a basis for choosing performance editions. Rather, it allows the researchers to weigh and ponder on many entangled issues, such as the composer's intentions, musical influences and music trends, composition habits, manuscripts chronology order, revisions to the draft, and traces of pre-composition plans. In addition, manuscripts could be situated in the network of various cultural or historical moments, and of a variety of musical styles and trends. It can be linked to a large web of associations contributing in different ways to the production of the manuscripts. Manuscripts are deeply rooted in historical processes and are essentially open text. The diversity of the twentieth century music manuscript, both in terms of musical language and medium, also raise new issues for sketch studies. Borrowing from Philip Gossett, this paper examines three areas of manuscript studies—confirmatory, suggestive, and conceptual—to ponder on the analysis of 20th century music. From this angle, the paper analyzes the manuscripts of Taiwanese composer Lu Yan. It focuses on several diagrams of integers in the composer’s sketches. In particular the paper examines how these diagrams reflect abstract conceptualization of pitch structure and harmony language, and how they are connected to his composition, “Woodwind Quintet.” These sketches of “pitch material” illustrate the profound thinking encompassing his harmony, melody and tone row and balanced relationship of sound world.Peer reviewedPrimarily in Chinese; abstract, annotations, notes, and some references in English
A Comparison of Trichordal Relations in Milton Babbitt's String Quartet No. 2 and Elliott Carter's A Symphony for Three Orchestras
No full textPeer reviewe
The Color of Music Heritage: Chinese America in American Ultra-Modern Music
No full textThis essay considers American ultra-modern music from the vantage point of Chinese America. It argues that the interiority of this racial terrain was molded by the negotiation, mimicry, and transformation necessarily attended musical activities across racial boundaries. Cowell‘s ultra-modern composition bears witness to Asian confluence in the American musical landscape at the beginning of the century, and raises the question of musical heritage. Rejecting the typical orientalist analysis and its self-other framework, this essay explores the significance of Chinatown music, and how a sonic idea that was engendered from it found expression in the dialogical space of American ultra-modern music.Peer reviewe
Cultural Boundary and National Border: Recent Works of Tan Dun, Chen Yi, and Bright Sheng
No full textPeer reviewe
Hearing Pentatonicism Through Serialism: Integrating Different Traditions in Chinese Contemporary Music
No full textCopyright 2002, Perspectives of New Music. Used by permission. This article first appeared in Perspectives of New Music vol 40 number 2, 2002.Peer reviewed
Author interview: q and a with Dr Aliya Hamid Rao on crunch time: how married couples confront unemployment
No full textWe speak to Dr Aliya Hamid Rao about her new book Crunch Time: How Married Couples Confront Unemployment, which draws on interviews with college-educated unemployed individuals and their spouses, alongside family observations with some of the participants, to explore how men and women have starkly different experiences of unemployment. This interview discusses how gender is ... Continue
Cramer-Rao bounds for deterministic modal analysis
No full textHow accurately can deterministic modes be identified from a finite record of noisy data? In this paper we answer this question by computing the Cramer-Rao bound on the error covariance matrix of any unbiased estimator of mode parameters. The bound is computed for many of the standard parametric descriptions of a mode, including autoregressive and moving average parameters, poles and residues, and poles and zeros. Asymptotic, frequency domain versions of the Cramer-Rao bound bring insight into the role played by poles and zeros. Application of the bound to second- and fourth-order systems illustrates the coupling between estimator errors and illuminates the influence of mode locations on our ability to identify them. Application of the bound to the estimation of an energy spectrum illuminates the accuracy of estimators that presume to resolve spectral peaks.This work was supported by Bonneville Power Administration under Contract DEB17990BP07346 and by the Office of Naval Research under Contract N00014-89-J-1070
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