Alcatel-Lucent

About: Alcatel-Lucent is a based out in Stuttgart, Germany. It is known for research contribution in the topics: Signal & Network packet. The organization has 37003 authors who have published 53332 publications receiving 1430547 citations. The organization is also known as: Alcatel-Lucent S.A. & Alcatel.

Method and apparatus for performing text-to-speech conversion in a client/server environment

Abstract: A method and apparatus for performing text-to-speech conversion in a client/server environment partitions an otherwise conventional text-to-speech conversion algorithm into two portions: a first “text analysis” portion, which generates from an original input text an intermediate representation thereof; and a second “speech synthesis” portion, which synthesizes speech waveforms from the intermediate representation generated by the first portion (ie, the text analysis portion) The text analysis portion of the algorithm is executed exclusively on a server while the speech synthesis portion is executed exclusively on a client which may be associated therewith The client may comprise a hand-held device such as, for example, a cell phone, and the intermediate representation of the input text advantageously comprises at least a sequence of phonemes representative of the input text Certain audio segment information which is to be used by the speech synthesis portion of the text-to-speech process may be advantageously transmitted by the server to the client, and a cache of such audio segments may then be advantageously maintained at the client (eg, in the cell phone) for use by the speech synthesis process in order to obtain improved quality of the synthesized speech

Salt-dependent conformational transitions in the self-complementary deoxydodecanucleotide d(CGCAATTCGCG): evidence for hairpin formation.

Abstract: Differential scanning calorimetry (DSC), temperature-dependent uv-absorption spectroscopy, and temperature-dependent CD were used to monitor and characterize the salt-dependent, thermally induced structural transitions in the deoxydodecanucleotide d(CGCGAATTCGCG). At the high oligomer concentrations required for DSC, the calorimetric scans revealed a single, monophasic transition curve at all salt concentrations. Based on previous nmr melting studies under similar conditions, we conclude that these monophasic transitions correspond to the cooperative duplex-to-single-strand conversion of the dodecamer. By contrast, at the lower oligomer concentrations used for the spectroscopic studies, the shapes of the uv and CD melting curves were found to depend on the concentration of the added salt. At high salt (≥0.1M Na+), a single, monophasic transition curve was observed. At lower salt (⩽0.01M Na+), the CD and uv melting curves exhibit biphasic behavior. Based on the concentration dependence, the enthalpy, and the cooperativity of each transition in the biphasic curve, we conclude that at low salt and low oligomer concentrations, the dodecamer melts in a sequential manner involving initial disruption of a duplex structure and subsequent disruption of a hairpin structure.

Measurement of the conduction‐band discontinuity of molecular beam epitaxial grown In0.52Al0.48As/In0.53Ga0.47As, N‐n heterojunction by C‐V profiling

Abstract: We report the first measurement of the conduction‐band discontinuity ΔEc for molecular beam epitaxial grown N‐n In0.52Al0.48As/In0.53Ga0.47As heterojunction using the C‐V profiling technique outlined by Kroemer et al. We find ΔEc=(0.50±0.05) eV @297 K corresponding to (71±7)% ΔEg. An interface charge density σi of (4.0±0.8)×1011 cm−2 was also obtained. A knowledge of ΔEc is of importance for quantifying carrier confinement in double heterostructure lasers fabricated from these ternary compounds.

Content-centric networking

Abstract: Methods of content-centric networking, a client, a server and computer program products are disclosed. A method of establishing a secure session for transfer of a stream of data packets between a client and a server of a content-centric network comprises the steps of: exchanging a first namespace portion indication between the server and the client; deriving a first namespace portion from the first namespace portion indication; incorporating the first namespace portion into a first namespace of a first request from the client to the server for a first data packet of the stream of data packets; deriving a subsequent namespace portion, the subsequent namespace portion being based on transfer of the first data packet, the subsequent namespace portion differing from the first namespace portion; and incorporating the subsequent namespace portion into a subsequent namespace of a subsequent request from the client to the server for a subsequent data packet of the stream of data packets. In this way, the namespace of each data packet changes and is related to the previous data packets such that the namespaces daisy-chain from one to the other, without the need for any additional authentication needing to take place between the two nodes when transferring a subsequent data packet. As long as both the client and the server derives the correct namespace for each subsequent data packet, it can be assumed that the session between the client and the server is still secure, which significantly improves performance whilst maintaining security.

Dynamic load balancing and scaling of allocated cloud resources in an enterprise network

Abstract: Various exemplary embodiments relate to a workload distribution system for an enterprise network (101) extended in to a cloud network (102) and a related method. The enterprise network (101) may include a series of servers in a private enterprise network and a scalable series of servers in a cloud network (102). The enterprise network (101) may employ one or more load balancers (103) in both a private enterprise network (101) and cloud network (102) that are connected to each series of servers to distribute work amongst the servers in both networks based on criteria such as overall system performance and costs. The enterprise network (101) may also employ one or more controllers (107) to scale the number of cloud servers (114a,..., 114e) allocated to the enterprise network (101) based on the system workload and other user- defined criteria, such as revenue generated per work request.