6,052 research outputs found
Audiomobiles, Sculptures and Conundrums
No full textRoberto Gerhard was a pioneer of electronic music in England creating a number of substantial concert, theatre and radio works from as early as 1954. Gerhard’s electronic music is one of the richest repositories for understanding the development of the composer’s late compositional technique. Apart from the Symphony no.3, ‘Collages’, none of Gerhard’s electronic music is published. This paper will discuss aspects of Gerhard’s electronic music, focusing on Audiomobiles (1958-59) and Sculptures (1963)
Roberto Gerhard’s Sound Compositions: A Historical-Philological Perspective. Archive, Process, Intent and reenactment
No full textThis research advances the current state of knowledge in the field of early tape music both empirically and methodologically. The purpose of this study is to evaluate the impact that the electronic medium exerted in the musical thinking of Roberto Gerhard, one of the most outspoken, prolific and influential composers in the Spanish diaspora whose musical legacy, for the most part unknown, is a major landmark in the early history of electroacoustic music. Gerhard’s personal tape collection, one of the largest historical archives of its kind reported in the literature, is exceptional for both its antiquity (50+-year-old tapes) and its abundance of production materials. Through the digitisation and analysis of the composer’s tape collection this research argues that the empirical study of audio documents sets out a basis for a broader understanding of textual processes. More specifically, the research demonstrates that the reconstruction of works based on magnetic tape sketches is a powerful method to advance the understanding of early tape music. This research also examines Gerhard’s sound compositions in relation to the post-war context in which they were composed. Finally, this research presents performance documentation that proposes an approach to the electroacoustic music repertoire in which creativity is not at odds with rigor and critical discernment demonstrating that archival study can be closely aligned to the concept of re-enactment
Filologia editoriale, Roberto Calasso in dialogo con Paola Italia e Francisco Rico
No full textPaola Italia e Francisco Rico intervengono sul libro di Roberto Calasso, presidente e fondatore di Adelphi Edizioni, L'impronta dell'editore, e discutono di problemi di filologia delle forme editoriali, dal punto di vista dell'autore, del lettore e dell'editore.Paola Italia and Francisco Ricos interview Roberto Calasso, Publisher, Writer, and Founder of Adelphi Edizioni, about his book: L'impronta dell'editore, talking about philology, publishing and editing, from the author, the reader and the publisher's point of view
A Metamodel for the Management of Large Databases: Toward Industry 4.0 in Metal Forming
No full textMetal forming machines can be servo-controlled and their numerical control can easily record and monitor several on-line process signals and loading curves, as a function of time, with a given sampling frequency. If these signals are collected and stored inside a designed database, any single forming process can generate a large amount of information that can be preciously used for process improvement and optimization. The database can be generated and stored locally at the machine, but it becomes more useful if it is transferred to a centralized big database. In both cases, if sampling frequencies are selected in order to follow the actual process dynamics, the amount of data stored can very easily and rapidly reach unpractical and unfeasible dimensions, in the order of magnitude of terabytes. A smart, designed and comprehensive strategy is therefore required for large data collecting and processing. Such a comprehensive strategy is difficult to be generalized for any forming process, but it must be specifically designed for each type of operation. In this paper, a framework for the management of large databases in the rotary draw tube bending process is proposed. A metamodeling technique for data compression is described and tested with actual process data, obtained during several rotary-draw bending of round stainless-steel tubes. Tube bending tests have been performed with CN controlled benders, where 12 axes can be actuated and 16 simultaneous output signals or loading curves have been recorded. The proposed method is able, for some of the selected signals, to reduce the amount of required data with a 75:1 ratio, with no significant loss of technological information
Roberto Tibau and the process of making architecture
No full textEste estudo documenta a vida e a obra de Roberto José Goulart Tibau (1924-2003), arquiteto brasileiro. O objetivo fundamental - e mais importante - é reunir informações sobre os projetos e obras mais significativos desenvolvidos durante sua atividade profissional, tornando-os acessíveis através dessa pesquisa. O trabalho baseou-se em pesquisa bibliográfica, levantamento e registro das obras e projetos realizados, currículo profissional, e depoimento de Tibau, concedido ao autor, em 1998. Em Roberto Tibau e o fazer arquitetura são descritos os caminhos percorridos pelo arquiteto; o contexto histórico de sua formação e atuação profissional; a relação de sua produção arquitetônica com outras obras da época; e eventuais referências projetuais utilizadas na criação dos seus projetos. Este trabalho vem preencher uma lacuna bibliográfica considerável, trazendo à luz, a obra deste significativo arquiteto, que dedicou sua vida ao trabalho na prancheta, na qual deixou sua marca de humanista.This study documents the life and work of Roberto José Goulart Tibau (1924-2003), a Brazilian architect. It aims to collect information about the most significant projects developed during the years of his professional career, which will become available through this research. The present study based on bibliographical research, examination and registration of the projects executed by the architect, his resumé, and his testimonial to the author of this research, in 1998. In Roberto Tibau and the process of making architecture there is a description of the ways in which his projects were conceived; the historical context through his professional activity since graduation, the relation between his own production and the production of other architects of the same period, and the projecting references used for his creations. This research is also an attempt to fill a signicant bibliographical gap of architecture history in Brazil by bringing to light the work of this relevant architect, who dedicated his life to working on his drawing table, leaving to us his humanistic style
Compression of unitary rank--structured matrices to CMV-like shape with an application to polynomial rootfinding
No full textThis paper is concerned with the reduction of a unitary matrix U to CMV-like shape. A Lanczos-type algorithm is presented which carries out the reduction by computing the block tridiagonal form of the Hermitian part of U, i.e., of the matrix U+UH. By elaborating on the Lanczos approach we also propose an alternative algorithm using elementary matrices which is numerically stable. If U is rank-structured then the same property holds for its Hermitian part and, therefore, the block tridiagonalization process can be performed using the rank-structured matrix technology with reduced complexity. Our interest in the CMV-like reduction is motivated by the unitary and almost unitary eigenvalue problem. In this respect, finally, we discuss the application of the CMV-like reduction for the design of fast companion eigensolvers based on the customary QR iteration. © 2014 Elsevier Inc. All rights reserved
Effect of surgical approach on complications, progression-free survival and disease-specific survival in cats with mammary adenocarcinoma
No full textMore than 80% of all mammary gland masses in cats are malignant and the behavior of these tumors is characterized by local invasion into the vasculature and surrounding tissues and by metastasis to distant locations, including the draining lymph nodes, lungs, pleura and liver. Due to this aggressive biological behavior, feline mammary adenocarcinoma (FMA) requires aggressive treatment: surgical excision, chemotherapy, immunotherapy and radiation therapy or combinations of these treatments. Surgical approach has been shown to affect progression-free interval (PFSI) when radical mastectomy is compared to regional mastectomy. Based on these data performing radical mastectomy of the affected mammary chain is a well-established recommendation regardless of tumor size. A more challenging question that has received little attention in the veterinary literature is whether to perform unilateral (URM) versus bilateral radical mastectomy (BRM) because of possible contact between individual glands, connections between the left and right mammary chains or the de novo development of mammary adenocarcinoma in the contralateral chain. The objectives of this multi-institutional retrospective study were to compare outcome among cats with mammary adenocarcinoma following excision with or without various systemic adjuvant therapies, and to evaluate the effect of surgical approach on PFSI (Progression Free Survival) ,and Disease-Specific Survival (DSS).
In the Preliminary Study chapter, We conducted a preliminary analysis on clinical records (116 cats) from 9 Veterinary Institutions in Europe and North America that underwent surgical excision of FMA by URM or BRM (staged or single-session) between 1991 and 2014. Adjuvant chemotherapy was administered to some cats; type and dose of chemotherapy drugs were recorded. PFSI as well the nature of the recurrence and OS (Overall Survival Time) were also recorded.
In this study, Median OS was not significantly longer for cats treated with BRM compared with URM, so no significant effect of surgical approach on OS was found.
In the Main project chapter, We reviewed all the data, the statistical analysis, and the inclusion criteria: We excluded cats that underwent local or regional mastectomy, that underwent URM but had bilateral disease, or that had distant metastasis at the time of surgery. However, cats with locoregional disease alone and no distant metastases were included. Outcome data obtained from 107 remaining cats included post-operative complications, progression-free survival (PFSI), and disease-specific survival (DSS).
Post-operative complications were significantly more likely to occur in cats undergoing BRM compared with URM.
The overall median PFSI was significantly longer for cats treated with BRM compared to URM. The overall median DSS was significantly longer for cats treated with BRM compared with URM.
In conclusion, the findings of this Main project support the use of the BRM for treatment of FMA in order to improve the PFSI and DSS. Performing BRM in a staged fashion may help to reduce complications
Approaching Qualitative Spatial Reasoning About Distances and Directions in Robotics
No full textOne of the long-term goals of our society is to build robots able to live side by side with humans. In order to do so, robots need to be able to reason in a qualitative way. To this end, over the last years, the Artificial Intelligence research community has developed a considerable amount of qualitative reasoners. The majority of such approaches, however, has been developed under the assumption that suitable representations of the world were available. In this paper, we propose a method for performing qualitative spatial reasoning in robotics on abstract representations of environments, automatically extracted from metric maps. Both the representation and the reasoner are used to perform the grounding of commands vocally given by the user. The approach has been verified on a real robot interacting with several non-expert users
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