946 resultados para Voice synthesization


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Translation is a regular phenomenon for news production, even if this is not always explicitly indicated. It is quite common that journalists themselves perform translations in their text production processes. Online media have added new possibilties to these processes. This paper looks at the transfer between print and online media texts from the point of view of translation. On the basis of case studies of English translations made available online by Spiegel International, the text production practice and its reflection in the linguistic structure of the translations is illustrated. The declared aim of putting English translations on the Spiegel website is to bring its 'unique voice' to English-speaking readers. This paper argues that this 'unique voice' will not be seen by the readers in the actual linguistic make-up of the texts, but that it is as a result of the text selection process that English-speaking readers can get access to a different point of view.

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A local area network that can support both voice and data packets offers economic advantages due to the use of only a single network for both types of traffic, greater flexibility to changing user demands, and it also enables efficient use to be made of the transmission capacity. The latter aspect is very important in local broadcast networks where the capacity is a scarce resource, for example mobile radio. This research has examined two types of local broadcast network, these being the Ethernet-type bus local area network and a mobile radio network with a central base station. With such contention networks, medium access control (MAC) protocols are required to gain access to the channel. MAC protocols must provide efficient scheduling on the channel between the distributed population of stations who want to transmit. No access scheme can exceed the performance of a single server queue, due to the spatial distribution of the stations. Stations cannot in general form a queue without using part of the channel capacity to exchange protocol information. In this research, several medium access protocols have been examined and developed in order to increase the channel throughput compared to existing protocols. However, the established performance measures of average packet time delay and throughput cannot adequately characterise protocol performance for packet voice. Rather, the percentage of bits delivered within a given time bound becomes the relevant performance measure. Performance evaluation of the protocols has been examined using discrete event simulation and in some cases also by mathematical modelling. All the protocols use either implicit or explicit reservation schemes, with their efficiency dependent on the fact that many voice packets are generated periodically within a talkspurt. Two of the protocols are based on the existing 'Reservation Virtual Time CSMA/CD' protocol, which forms a distributed queue through implicit reservations. This protocol has been improved firstly by utilising two channels, a packet transmission channel and a packet contention channel. Packet contention is then performed in parallel with a packet transmission to increase throughput. The second protocol uses variable length packets to reduce the contention time between transmissions on a single channel. A third protocol developed, is based on contention for explicit reservations. Once a station has achieved a reservation, it maintains this effective queue position for the remainder of the talkspurt and transmits after it has sensed the transmission from the preceeding station within the queue. In the mobile radio environment, adaptions to the protocols were necessary in order that their operation was robust to signal fading. This was achieved through centralised control at a base station, unlike the local area network versions where the control was distributed at the stations. The results show an improvement in throughput compared to some previous protocols. Further work includes subjective testing to validate the protocols' effectiveness.

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Common approaches to IP-traffic modelling have featured the use of stochastic models, based on the Markov property, which can be classified into black box and white box models based on the approach used for modelling traffic. White box models, are simple to understand, transparent and have a physical meaning attributed to each of the associated parameters. To exploit this key advantage, this thesis explores the use of simple classic continuous-time Markov models based on a white box approach, to model, not only the network traffic statistics but also the source behaviour with respect to the network and application. The thesis is divided into two parts: The first part focuses on the use of simple Markov and Semi-Markov traffic models, starting from the simplest two-state model moving upwards to n-state models with Poisson and non-Poisson statistics. The thesis then introduces the convenient to use, mathematically derived, Gaussian Markov models which are used to model the measured network IP traffic statistics. As one of the most significant contributions, the thesis establishes the significance of the second-order density statistics as it reveals that, in contrast to first-order density, they carry much more unique information on traffic sources and behaviour. The thesis then exploits the use of Gaussian Markov models to model these unique features and finally shows how the use of simple classic Markov models coupled with use of second-order density statistics provides an excellent tool for capturing maximum traffic detail, which in itself is the essence of good traffic modelling. The second part of the thesis, studies the ON-OFF characteristics of VoIP traffic with reference to accurate measurements of the ON and OFF periods, made from a large multi-lingual database of over 100 hours worth of VoIP call recordings. The impact of the language, prosodic structure and speech rate of the speaker on the statistics of the ON-OFF periods is analysed and relevant conclusions are presented. Finally, an ON-OFF VoIP source model with log-normal transitions is contributed as an ideal candidate to model VoIP traffic and the results of this model are compared with those of previously published work.

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Drawing on exit, voice, loyalty and neglect (EVLN) literature, this study examines direct and interactive associations between organizational-level commitment and team-level commitment and the use of EVLN by managers in India. The study is based on a survey of 200 managers and supervisors from seven Indian firms. The findings on the use of voice are consistent with the past research in Western countries, but challenge the prevailing assumption about the use of voice in high power distance societies. The results also indicate that team-level commitment moderates the association between organizational-level commitment and the use of EVLN.

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Community unionism has emerged in the past decade as a growing strand of industrial relations research and is influencing trade union strategies for renewal. This article seeks to further develop the concept, while exploring the potential roles for unions in communities subject to projects of urban regeneration.

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The recent explosive growth of voice over IP (VoIP) solutions calls for accurate modelling of VoIP traffic. This study presents measurements of ON and OFF periods of VoIP activity from a significantly large database of VoIP call recordings consisting of native speakers speaking in some of the world's most widely spoken languages. The impact of the languages and the varying dynamics of caller interaction on the ON and OFF period statistics are assessed. It is observed that speaker interactions dominate over language dependence which makes monologue-based data unreliable for traffic modelling. The authors derive a semi-Markov model which accurately reproduces the statistics of composite dialogue measurements. © The Institution of Engineering and Technology 2013.

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This article draws upon the use of photography to research the lives of children living in Accra, Ghana. Its aim is to consider method in visual research, and to reflect upon those modes of explanation and understanding that any consideration of method must require. It suggests a role for photography as a 'vector', as something capable of connecting our knowledge and understanding of the everyday with the everyday experiences and reality of others. Drawing upon the photographs and spoken testimonies of children who live and work on the street, and of children who live in a large informal settlement, the article advances an intimate connection between photography and knowledge of the everyday reality of children's lives, most evident in the capacity of children's photographs to surprise and highlight the fallibility of our understandings. © 2010 International Visual Sociology Association.

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Due to the dynamic and mutihop nature of the Mobile Ad-hoc Network (MANET), voice communication over MANET may encounter many challenges. We set up a subjective quality evaluation model using ITU-T E-model with extension. And through simulation in NS-2, we evaluate how the following factors impact voice quality in MANET: the number of hops, the number of route breakages, the number of communication pairs and the background traffic. Using AODV as the underlying routing protocol, and with the MAC layer changed from 802.11 DCF to 802.11e EDCF, we observe that 802.11e is more suitable for implementating voice communication over MANET. © 2005 IEEE.

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The popular technologies Wi-Fi and WiMAX for realization of WLAN and WMAN respectively are much different, but they could compliment each other providing competitive wireless access for voice traffic. The article develops the idea of WLAN/WMAN (Wi-Fi/WiMAX) integration. WiMAX is offering a backup for the traffic overflowing from Wi-Fi cells located into the WiMAX cell. Overflow process is improved by proposed rearrangement control algorithm applied to the Wi-Fi voice calls. There are also proposed analytical models for system throughput evaluation and verification of the effectiveness using WMAN as a backup for WLAN overflow traffic and the proposed call rearrangement algorithm as well.

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A dolgozat a politikatudomány és közgazdaság-tudomány határán álló kivonulás-tiltakozás-hűség modell lényegét járja körbe. Az Albert O. Hirschman által felépített gondolati keret szemléleti frissessége és sajátos megközelítési módja rendkívül termékenyítően hatott az elmúlt évtizedekben a társadalomtudományok fejlődésére. Mégis viszonylag periferikus helyet foglal el a közgazdaság-tudományon belül, miközben például a rendszerváltás és az azt követő társadalmi feszültségek megjelenése szempontjából is sokoldalúan használható fogalmi keretről van szó. A válság indukálta turbulens környezet még inkább rávilágít arra, hogy ma is időszerű perspektívát kínál a hanyatlás politikai gazdaságtana, azaz hasznos elemzési kapaszkodó nyújt az úgynevezett Hirschman-trilemma a társadalmi és gazdasági folyamatok értelmezéséhez. ________ The article concerns the "exit, voice, and loyalty" concept, which straddles the border of political science and economics. This theoretical framework, invented by Albert O. Hirschman, has exercised a fruitful influence in the social sciences in the last few decades, through its fresh features and original approach. However, it holds a peripheral position in economics and plays an undervalued role in eco-nomic education in Hungary, even though it can be flexibly applied in analyses of such phenomena as the economic transition and the ensuing social tensions. Moreover the very turbulence of the conditions brought about by the crisis show that the political economy of decline offers a relevant perspective, so that the Hirschman trilemma is a practical analytical tool for understanding social and economic processes.

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Tanulmányunkban az Albert 0. Hirschman által kialakított „kivonulás, tiltakozás, hűség” koncepció metaelméleti felhasználásával a „kapitalizmus változatai” elméletet vesszük bírálat alá. Egyrészt arra mutatunk rá, hogy már a különböző piacgazdasági modellek tipologizálásához használt vállalatelméleti dimenziójú elemzések is építkeznek a Hirschman-trilemmából, másrészt arra hívjuk fel a figyelmet, hogy olyan sajátos eszközről van szó, amely a tőke- és munkaerő-piaci folyamatok elemzésére támaszkodva új perspektívát is kínál a kapitalista gazdaságok komparatív vizsgálatához. A dolgozat terjedelmi okokból az empirikus kutatásokat megalapozó elméleti alapozásra szorítkozik. ____ In our study we deal with the critical analysis of the “varieties of capitalism” theory by using the “exit, voice, and loyalty” meta-theory invented by Albert O. Hirschman. The paper emphasizes that on the one hand the analyses of the theory of the firm and business used for the classification of distinct market models are also building upon the “Hirschman trilemma”, and on the other hand, it draws attention to the fact that the Hirschmanian method based on labor market and capital market offers a new perspective for the comparative analysis of capitalist economies. The focus of the article is only the theoretical foundation of empirical studies as a result of limitation of scope.

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Republican John Sherman, United States Congressman, Senator, Treasury Secretary, and Secretary of State had a political career of major importance from 1855 to 1898, yet there have been only casual references by historians and only two biographies of him, with the most recent published in 1902. From a strong Whig Party background, he was first elected to the United States House of Representatives in 1854; switching to the Republicans that same year. Then elevated to the Senate in 1861, he served in that body throughout the Civil War and Reconstruction when he was the most important voice of party unity and moderation. In 1877, the new President Rutherford Hayes appointed Sherman Secretary of the Treasury. He returned to the Senate after the Hayes administration where he sat for the following 15 years. In this particularly notable period, he not only led the upper house, but he engineered more bills in Congress which bore his name than any other member of either house. These included the critically important Sherman Silver Purchase Act, the Sherman Anti-Trust Act and Sherman Inter-State Commerce Act. In 1897 he left the Senate finally when William McKinley appointed him Secretary of State. ^ Through this long, distinguished career, Sherman was involved in all the important legislation that brought the country through the Civil War and Reconstruction and into the post-war world of the Gilded Age of rapid industrialization, and urban growth, Politically, he never strayed far from the nationalistic and economic principles of the Whig Party, and brought both these values to bear in the Republican Party that dominated American political life from 1860 to 1900. Similarly, party loyalty and loyalty to the President always characterized his service. He was indeed, an exemplar of political and statesmanship. ^ While research for this dissertation included review of both journal and monographic literature, its basis lies more critically in primary research in unpublished archival material in repositories from Maine to Ohio, in particular the Library of Congress. ^