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Institution

Deutsche Telekom

CompanyWelwyn Garden City, United Kingdom
About: Deutsche Telekom is a company organization based out in Welwyn Garden City, United Kingdom. It is known for research contribution in the topics: Telecommunications network & Terminal (electronics). The organization has 3473 authors who have published 5208 publications receiving 65429 citations. The organization is also known as: DTAG & German Telecom.


Papers
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Journal ArticleDOI
TL;DR: The goal of modeling is to establish a generalization from the set of observed data such that accurate inference can be made about the data yet to be observed, which is referred to as unseen data.
Abstract: Solving real-world classification and recognition problems requires a principled way of modeling the physical phenomena generating the observed data and the uncertainty in it. The uncertainty originates from the fact that many data generation aspects are influenced by nondirectly measurable variables or are too complex to model and hence are treated as random fluctuations. For example, in speech production, uncertainty could arise from vocal tract variations among different people or corruption by noise. The goal of modeling is to establish a generalization from the set of observed data such that accurate inference (classification, decision, recognition) can be made about the data yet to be observed, which we refer to as unseen data.

54 citations

Book ChapterDOI
16 Sep 1998
TL;DR: The paper presents a novel approach to Java byte code verification: the verification process is performed “offline” on a network server, instead of incorporating it in the client.
Abstract: The paper presents a novel approach to Java byte code verification: The verification process is performed “offline” on a network server, instead of incorporating it in the client. Furthermore, the most critical part of the verification process is based upon a formal model and uses a model checker for checking the verification conditions. The result of the verification process can be securely communicated to the runtime platform with cryptographic means.

54 citations

Journal ArticleDOI
TL;DR: In this article, the rotation of the polarization plane of a light wave traveling in an optical fiber that lies on a space curve based on parallel transport is described and an estimation of the effect due to winding the fiber is presented.
Abstract: The rotation of the polarization plane of a light wave traveling in an optical fiber that lies on a space curve based on parallel transport is described. An estimation of the effect due to winding the fiber is presented.

54 citations

Patent
06 Feb 2009

54 citations

Proceedings ArticleDOI
13 Apr 2008
TL;DR: It is shown that the widely observed unfairness of the protocol in small network topologies does not always persist in large topologies, and in situations where the protocol is long-term fair, a characterization of its short-term fairness is provided.
Abstract: We characterize the fairness of decentralized medium access control protocols based on CSMA/CA, such as IEEE 802.11, in large multi-hop wireless networks. In particular, we show that the widely observed unfairness of the protocol in small network topologies does not always persist in large topologies. This unfairness is essentially due to the unfair advantage of nodes at the border of the network, which have a restricted neighborhood and thus a higher probability to access the communication channel. In large one-dimensional networks these border effects do not propagate inside the network, and nodes sufficiently far away from the border have equal access to the channel; as a result the protocol is long-term fair. In two-dimensional networks, we observe a phase transition. If the access intensity of the protocol is small, the border effects remain local and the protocol behaves similarly as in one- dimensional networks. However, if the access intensity of the protocol is large enough, the border effects persist independently of the size of the network and the protocol is strongly unfair. Finally, in situations where the protocol is long-term fair, we provide a characterization of its short-term fairness.

54 citations


Authors

Showing all 3475 results

NameH-indexPapersCitations
Jörg Müller6740715282
Anja Feldmann6734017422
Yuval Elovici6254414451
Lior Rokach5535719989
Pan Hui5246817724
Hartmut G. Roskos504349643
Wolfgang Haase5062411634
Shlomi Dolev4851610435
Jean-Pierre Seifert452987516
Stefan Schmid455619088
Fabian Schneider441647437
Karsten Buse433947774
Tansu Alpcan432937840
Florian Metze423187148
Christian Bauckhage422858313
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20232
20227
202139
202061
201984
201897