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Institution

Alcatel-Lucent

Stuttgart, Germany
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.


Papers
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Patent
28 Nov 1997
TL;DR: In this article, a non-bottleneck solution is provided to share load among servers by migrating or replicating objects over from highly loaded servers to less highly load servers, while avoiding directing access requests to servers from which replicas of requested objects have been deleted.
Abstract: A system an method for efficiently providing access by a large number of clients to objects located at a large number of information servers. A non-bottleneck solution is provided to sharing load among servers by migrating or replicating objects over from highly loaded servers to less highly loaded servers. Objects that experience low loading are deleted to make room for more highly used objects and to permit make space for new objects. A naming service is provided to provide rapid access to a replica of a requested objects, while avoiding directing access requests to servers from which replicas of requested objects have been deleted. Hierarchical ordering of replication and naming functions permits a variety of particular access methods to be realized.

192 citations

PatentDOI
TL;DR: In this paper, a method and apparatus for synthesizing speech from text whereby the speech may be generated in a manner so as to effectively convey a particular, selectable style is presented.
Abstract: A method and apparatus for synthesizing speech from text whereby the speech may be generated in a manner so as to effectively convey a particular, selectable style. Repeated patterns of one or more prosodic features—such as, for example, pitch, amplitude, spectral tilt, and/or duration—occurring at characteristic locations in the synthesized speech, are advantageously used to convey a particular chosen style. For example, one or more of such feature patterns may be used to define a particular speaking style, and an illustrative text-to-speech system then makes use of such a defined style to adjust the specified parameter or parameters of the synthesized speech in a non-uniform manner (i.e., in accordance with the defined feature pattern or patterns).

192 citations

Journal ArticleDOI
TL;DR: Although specific measures differed between the professional and student populations, the outcomes of almost all statistical tests were identical, suggesting that the graduate students provided an adequate model of the professional population and that the much greater expense of conducting studies with professionals may not always be required.
Abstract: Software requirements specifications (SRS) are often validated manually. One such process is inspection, in which several reviewers independently analyze all or part of the specification and search for faults. These faults are then collected at a meeting of the reviewers and author(s). Usually, reviewers use Ad Hoc or Checklist methods to uncover faults. These methods force all reviewers to rely on nonsystematic techniques to search for a wide variety of faults. We hypothesize that a Scenario-based method, in which each reviewer uses different, systematic techniques to search for different, specific classes of faults, will have a significantly higher success rate. In previous work we evaluated this hypothesis using 48 graduate students in computer science as subjects. We now have replicated this experiment using 18 professional developers from Lucent Technologies as subjects. Our goals were to (1) extend the external credibility of our results by studying professional developers, and to (2) compare the performances of professionals with that of the graduate students to better understand how generalizable the results of the less expensive student experiments were. For each inspection we performed four measurements: (1) individual fault detection rate, (2) team fault detection rate, (3) percentage of faults first identified at the collection meeting (meeting gain rate), and (4) percentage of faults first identified by an individual, but never reported at the collection meeting (meeting loss rate). For both the professionals and the students the experimental results are that (1) the Scenario method had a higher fault detection rate than either Ad Hoc or Checklist methods, (2) Checklist reviewers were no more effective than Ad Hoc reviewers, (3) Collection meetings produced no net improvement in the fault, and detection rate—meeting gains were offset by meeting losses, Finally, although specific measures differed between the professional and student populations, the outcomes of almost all statistical tests were identical. This suggests that the graduate students provided an adequate model of the professional population and that the much greater expense of conducting studies with professionals may not always be required.

192 citations

Journal ArticleDOI
TL;DR: In this paper, the design of a directive antenna using the electromagnetic resonances of a Fabry-Perot cavity was reported. But the design was based on a patch antenna placed in the cavity at the vicinity of the ground plane and only one excitation point is needed.
Abstract: We report the design of a directive antenna using the electromagnetic resonances of a Fabry-Perot cavity The Fabry-Perot cavity is made of a ground plane and a single metallic grid The resonance is excited by a patch antenna placed in the cavity at the vicinity of the ground plane The two remarkable features of Fabry-Perot cavity antennas are, first, that they are very thin and second that only one excitation point is needed A directivity of about 600 is measured at f=1480 GHz which is to our knowledge one of the highest directivities reported for an antenna using Fabry-Perot resonances

191 citations

Journal ArticleDOI
TL;DR: There has been dramatic progress in the development of electron correlation techniques for the accurate treatment of the structures and energies of molecules as mentioned in this paper, and the range of applicability as well as the limitations of the methods with a few selected examples.
Abstract: There has been dramatic progress in the development of electron correlation techniques for the accurate treatment of the structures and energies of molecules. In this review, we give brief and somewhat qualitative descriptions of the different methods that have been developed in recent years. We also discuss the range of applicability as well as the limitations of the methods with a few selected examples. We focus particular attention on electron correlation methods which start from a Hartree-Fock wave function since such singleconfiguration-based approaches are most easily extended to larger molecules. Multiconfiguration-based correlation techniques are considered briefly. We also present a fairly thorough account of the recent developments and applications using novel quantum Monte Carlo approaches.

191 citations


Authors

Showing all 37011 results

NameH-indexPapersCitations
George M. Whitesides2401739269833
Yoshua Bengio2021033420313
John A. Rogers1771341127390
Zhenan Bao169865106571
Thomas S. Huang1461299101564
Federico Capasso134118976957
Robert S. Brown130124365822
Christos Faloutsos12778977746
Robert J. Cava125104271819
Ramamoorthy Ramesh12264967418
Yann LeCun121369171211
Kamil Ugurbil12053659053
Don Towsley11988356671
Steven P. DenBaars118136660343
Robert E. Tarjan11440067305
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20231
202212
202130
202050
201983
2018215