198,341 research outputs found
First record of the southeast European species Cerinthe retorta Sibth. & Sm. (Boraginaceae) in Italy and considerations on its distribution and conservation status
No full textCerinthe retorta Sibth. and Sm. has been detected in calcareous rocky slopes in Valle dellInferno on the Gargano promontory (Apulia, southeastern Italy). It is the first record of the species in Italy and the westernmost site of the distribution of this mostly Aegean species. This disjunction may provide evidence for past amphi-Adriatic/amphi-Ionic terrestrial connections. The IUCN assessment of the species in Italy and in Europe and the global assessment are briefly discussed. © 2014 Société botanique de France
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Possible Frohlich superconductivity in strong magnetic fields.
No full textA brief review of some of the arguments pointing towards the possibility of organic conductors of the form {alpha}-(BEDT-TTF)&J3g(SCN)4 (where M=K, T1 and Rb) being candidates for Frohlich superconductivity is given
Acoustic voice analysis by means of the hoarseness diagram
No full textThe hoarseness diagram (Michaelis, Frohlich, & Strube, 1998a) has been proposed as a new approach to describe different acoustic properties of voices. To test its performance in the analysis of pathologically disturbed and normal voices five requirements are suggested that should be met by any acoustic voice-analysis protocol to be used in voice research and clinical practice. The hoarseness diagram is then tested with regard to these requirements. Individual voices are Found to show a satisfactory localization in the diagram. Aspects of stationarity are discussed in the context of four case studies. The different cases illustrate that changes in the acoustic analysis results are observed if the voice-generation conditions change, whereas results are stationary if phonation conditions do not change. Different pathological voice groups defined on grounds of the specific phonation mechanism are found to map to specific regions of the hoarseness diagram, with differences between group locations being significant. All results can be interpreted without exceptions if the two hoarseness diagram coordinates are taken to reflect the vibrational irregularity of the voice-generation mechanisms on the one side and the degree of closure of the vibrating structures on the other side. The hoarseness diagram and its underlying algorithms are thus shown to constitute a useful approach to acoustic voice analysis in research and clinical practice. The tests themselves demonstrate several application possibilities, including the quantitative monitoring of individual voices
Acoustic voice analysis by means of the hoarseness diagram
No full textThe hoarseness diagram (Michaelis, Frohlich, & Strube, 1998a) has been proposed as a new approach to describe different acoustic properties of voices. To test its performance in the analysis of pathologically disturbed and normal voices five requirements are suggested that should be met by any acoustic voice-analysis protocol to be used in voice research and clinical practice. The hoarseness diagram is then tested with regard to these requirements. Individual voices are Found to show a satisfactory localization in the diagram. Aspects of stationarity are discussed in the context of four case studies. The different cases illustrate that changes in the acoustic analysis results are observed if the voice-generation conditions change, whereas results are stationary if phonation conditions do not change. Different pathological voice groups defined on grounds of the specific phonation mechanism are found to map to specific regions of the hoarseness diagram, with differences between group locations being significant. All results can be interpreted without exceptions if the two hoarseness diagram coordinates are taken to reflect the vibrational irregularity of the voice-generation mechanisms on the one side and the degree of closure of the vibrating structures on the other side. The hoarseness diagram and its underlying algorithms are thus shown to constitute a useful approach to acoustic voice analysis in research and clinical practice. The tests themselves demonstrate several application possibilities, including the quantitative monitoring of individual voices
Stability of Holstein and Frohlich bipolarons
No full textWe have investigated bipolaron formation in the Holstein-Hubbard and the Frohlich-Hubbard model on a discrete one-dimensional lattice. Phonon enriched basis has been generated by exploiting the idea of the Lang-Firsov transformation, which results in better convergence in the strong coupling regime. The incorporation of the finite-range electron-phonon (e-ph) interaction reduces the bipolaron effective mass. We systematically increase the spatial extent of the e-ph interaction to study the effect of the long-range tail of the Frohlich model. The electron-electron (e-e) interaction also plays a crucial role in lowering the effective mass for both the Holstein and the Frohlich bipolarons. In the presence of the extended e-e interaction, the intersite S1 Holstein bipolaron becomes unstable, while the effective mass of the Frohlich bipolaron becomes significantly reduced for both the spin singlet and triplet cases.open1166sciescopu
Possible Frohlich superconductivity in strong magnetic fields
No full textA brief review of some of the arguments pointing towards the possibility of organic conductors of the form alpha-(BEDT-TTF)(2)MHg(SCN)(4) (where M = K, Tl and Rb) being candidates for Frohlich superconductivity is given. (C) 2002 Published by Elsevier Science B.V
Mobile ethics
No full textMatt Jones and David Frohlich describe the innovative StoryBank project in a rural Indian Village
The gayest sculpture in history: Obscured male same-sex desire in the descriptions of the Antinous statues in eighteenth-century art history and nineteenth-century German fiction
No full textEmbargo set by: Seth Robbins for item 121063
Lift date: 2024-01-12T22:35:30Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemAuthor requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I OnlyRarely has an ancient marble figure received as much attention in both art history and historical fiction as Antinous (c. AD 111-130). Antinous was emperor Hadrian’s (AD 76-138) companion, favorite, and beloved. Following his untimely and mysterious death in the Nile, the emperor deified Antinous, named a star after him, built him a city, and commissioned statues that were dispersed throughout the Roman Empire and praised for their exceptional beauty.
Although scholarship has analyzed the historical figure, art history’s and literature’s obsession with Antinous remains in the margins of scholarly interest. Today Antinous remains popular in gay subcultures as can be seen in a number of homoerotic fan fiction novels. Representing Antinous and his enigmatic relationship with the Roman emperor in popular culture is grounded in art as much as it is in history. The emphasis of this interdisciplinary dissertation is not the exploration of the historical figure’s sexual orientation, whether Antinous was gay, but how eighteenth-century art history and nineteenth-century German fiction imagined the relationship between Hadrian and Antinous. The first chapter explores the origin of the Antinous reception in late eighteenth-century art history, the second chapter outlines the emergence of Antinous as a marker for a homosexual identity in the middle of the nineteenth century, and the last two chapters analyze the literary devices that allowed his appearance in two popular historical novels in the late nineteenth century.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-08-01The student, Johannes Frohlich, accepted the attached license on 2021-07-02 at 08:54.The student, Johannes Frohlich, submitted this Dissertation for approval on 2021-07-02 at 09:06.This Dissertation was approved for publication on 2021-07-06 at 15:27.DSpace SAF Submission Ingestion Package generated from Vireo submission #16748 on 2022-01-12 at 12:52:49Made available in DSpace on 2022-01-12T22:34:50Z (GMT). No. of bitstreams: 2
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Previous issue date: 2021-07-0
Uma Proposta de framework para a geração de protocolos MAC para RSSF
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Ciência da Computação, Florianópolis, 2013.Redes de sensores sem fio são altamente dependentes de protocolos de controle de acesso ao meio para fazer uso efetivo dos poucos recursos disponíveis em seus nós sensores. Entretanto a maioria das otimizações propostas nos protocolos existentes focam em segmentos específicos do espaço de projeto. O que é considerado como uma otimização por uma classe de aplicações pode representar uma forte limitação para outras. Um protocolo com o objetivo de cobrir uma ampla fração do universo de aplicações de redes sensores deve apresentar algum mecanismo de configurabilidade ou adaptabilidade. Nesse sentido surgiu o Configurable Medium Access Control (C-MAC) (WANNER; OLIVEIRA; FROHLICH, 2007). O C-MAC funciona como um framework de estratégias de controle de acesso ao meio, as quais podem ser combinadas para produzir protocolos específicos de aplicação. Através desse paradigma, programadores de aplicações podem criar novos serviços de comunicação sob demanda e experimentar diferentes parâmetros de comunicação, coletando métricas para identificar e ajustar o protocolo às suas necessidades. Contudo, a arquitetura original do C-MAC fornece um baixo reuso de seus componentes em software, dificultando e reduzindo sua configurabilidade. Esta dissertação apresenta a proposta, implementação e avaliação de uma nova arquitetura para o framework C-MAC. Através de uma análise das diferentes categorias de protocolos MAC para redes de sensores, foram identificadas características comuns e especificidades desses protocolos que foram consideradas no desenvolvimento do novo C-MAC. Além disso, o que era um único grande componente na arquitetura original, foi separado em diferentes microcomponentes e novos microcomponentes foram incluídos de forma a suportar mais funcionalidades. Dessa forma, a arquitetura proposta possibilita um maior reuso de seus componentes em software, fornecendo maior configurabilidade e, consequentemente, suportando mais aplicações.Abstract : Wireless sensor networks are highly dependent on medium access controlprotocols to make effective use of the few resources available on sensor nodes.Nevertheless, most of the optimizations proposed by existing protocols focuson specific segments of the design space. What is considered an optimizationby one class of applications can represent a strong limitation for others.A protocol aiming at covering a large fraction of the application universefor sensor networks must feature configuration or adaptation mechanisms.Therefore, the Configurable Medium Access Control (C-MAC) wascreated (WANNER; OLIVEIRA; FROHLICH, 2007). C-MAC is realized asa framework of medium access control strategies that can be combined toproduce application-specific protocols. Through this paradigm, applicationprogrammers can create new communication services on demand and experimentwith different communication parameters, collecting metrics to identifyand adjust the protocol to match their applications? requirements. Nonetheless,C-MAC original architecture provides low reuse of software components,hindering its configurability.This dissertation presents the proposal, implementation, and evaluation ofa new architecture for the framework C-MAC. Through the analysis of thedifferent categories of MAC protocols for sensor networks, common characteristicsand specificities of these protocols were identified and used in thedevelopment of the new C-MAC. Thus, the proposed architecture enables agreater reuse of its software components, providing greater configurabilityand, consequently, supporting a wider range of applications
SIM - simultaneous inverse filtering and matching of a glottal flow model for acoustic speech signals
No full textA new method "simultaneous inverse filtering and model matching" (SIM) is proposed that allows one to calculate voice source measures without any user interaction. It is based on the discrete all-pole modeling (DAP) technique for inverse filtering (IF), which is modified to include a model of the glottal flow as integral part [LF model, Fant ct al., STL-QPSR (Stockholm) 4/1985, 1-13 (1986)]. As the correct LF parameters are initially unknown, they are estimated in an iterative procedure using multi-dimensional optimization techniques that are initialized according to the results of an exhaustive search. The error criteria applied reflect how well the IF is performed after the spectral contribution of the glottal flow has been removed. The resulting optimal LF parameter constellation serves as the basis to calculate 11 voice source measures. The performance was evaluated using synthesized signals and recordings of natural utterances. For the synthesized signals, the accuracy to reproduce the original parameters was high (correlations exceeding 0.88) for measures where the starting point of the glottal cycle did not enter explicitly. Errors were smaller compared to conventional estimation methods where the measures were estimated from the IF signal. The analysis of natural utterances indicates that problems still exist with regard to robustness, but that under advantageous conditions the open quotient, the speed quotient, the closing quotient, the parabolic spectral parameter, and the negative peak amplitude of the glottal flow derivative can indeed be determined automatically by the SIM method. (C) 2001 Acoustical Society of America
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