scispace - formally typeset
Search or ask a question
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
More filters
Book ChapterDOI
21 Apr 2009
TL;DR: This paper proposes the use of Enterprise Architecture models coupled with Bayesian Belief Networks to facilitate Failure Impact Analysis and uses the Diagnosis algorithm implemented in the Bayesian belief Network tool GeNIe to use the network as a Decision Support System and rank architectural components with their respect to criticality for the functioning of a business process.
Abstract: The increasing complexity of enterprise information systems makes it very difficult to prevent local failures from causing ripple effects with serious repercussions to other systems. This paper proposes the use of Enterprise Architecture models coupled with Bayesian Belief Networks to facilitate Failure Impact Analysis. By extending the Enterprise Architecture models with the Bayesian Belief Networks we are able to show not only the architectural components and their interconnections but also the causal influence the availabilities of the architectural elements have on each other. Furthermore, by using the Diagnosis algorithm implemented in the Bayesian Belief Network tool GeNIe, we are able to use the network as a Decision Support System and rank architectural components with their respect to criticality for the functioning of a business process. An example featuring a car rental agency demonstrates the approach.

19 citations

Patent
16 Jul 1998
TL;DR: In this paper, a transcoder provided with a control unit and intended for decoding encoded TV programs is described, which is characterized in that the interface for the identification or key component is located in said control unit.
Abstract: The invention pertains to a transcoder provided with a control unit and intended for decoding encoded TV programs Said transcoder has an input for entering an encoded TV program, a decoding device for decoding an encoded TV program into a format which can be played on a television set, an output which can be connected to said television set and is designed to enter the encoded TV program into the television set for play, an interface for an identification or key component, to be used for validation of the decoding device, as well as an interface for a control unit in the transcoder The transcoder according to the invention is characterized in that the interface for the identification or key component is located in said control unit

19 citations

Patent
Gerhard Fleck1
28 Mar 1995
TL;DR: In this article, a system zur Sicherung eines Fahrzeugs (4) gegen unberechtigte Benutzung is vorgesehen, das im vehicle (4), eine Uberwachungseinrichtung (5) with einem Sende/Empfangsgerat (7) fur ein Mobilfunknetz with mindestens einer fur den Betrieb des FahRzeugs, insbesondere Zundung (11), Kraftstoffpumpe (13), An
Abstract: Bei einem System zur Sicherung eines Fahrzeugs (4) gegen unberechtigte Benutzung ist vorgesehen, das im Fahrzeug (4) eine Uberwachungseinrichtung (5) mit einem Sende/Empfangsgerat (7) fur ein Mobilfunknetz mit mindestens einer fur den Betrieb des Fahrzeugs (4) erforderlichen Fahrzeugeinrichtung, insbesondere Zundung (11), Kraftstoffpumpe (13), Anlasser, derart verbunden ist, das die Funktion der Fahrzeugeinrichtung durch die Uberwachungseinrichtung (5) blockierbar ist, das die Uberwachungseinrichtung (5) von Zeit zu Zeit eine Meldung uber das Mobilfunknetz an eine Zentralstelle (3) sendet und das die Uberwachungseinrichtung (5) die Funktion der Fahrzengeinrichtung blockiert, wenn keine Ruckmeldung empfangen wird.

19 citations

Journal ArticleDOI
TL;DR: In this paper, the femtosecond pulses of a collinearly pumped optical parametric oscillator (OPO) are applied for investigations of the carrier dynamics in ternary and quaternary semiconductor quantum wells.
Abstract: Femtosecond pulses of a collinearly pumped Optical Parametric Oscillator (OPO) are applied for investigations of the carrier dynamics in ternary and quaternary semiconductor quantum wells. The design and the specifications of the OPO are given in detail. We show that no measurable jitter exists between the pump pulses and the output pulses of the OPO. Therefore, it is possible to use the OPO and its pump laser for two-color experiments with a time resolution limited by the pulse lengths. We present and discuss results of transient four-wave mixing experiments on (InGa) As/InP quantum wells, and find a new kind of polarization-dependent quantum beat phenomenon. In addition, non-degenerate experiments on quantum wells from the quaternary (InGaAl) As material system, using two pulses at different wavelengths (one from the OPO and one from the pump laser), are discussed as a novel experimental technique to study carrier trapping into quantum wells.

19 citations

Patent
Uwe K H Korst1
06 Feb 1997
TL;DR: In this article, a distinction between on-line terminals at all times have access to a data connection and stand-alone terminals that have no data connection is made, and the use of smart cards to be improved so that a data exchange is enabled with a low data rate without data connection.
Abstract: At current terminal, a distinction between on-line terminals at all times have access to a data connection and off-line terminals or stand-alone terminals that have no data connection. On-Line Terminals can exchange at any time via a temporary or permanent data connection information and / or data. The off-line or stand-alone terminals do not have this immediate opportunity or ability. It is specified here as the off-line terminals with minor modifications and the use of smart cards to be improved so that a data exchange is enabled with a low data rate without a data connection. This is done in that the customer smart card to the mobile data carrier (4). Every time you use a smart card to an off-line terminal data between the smart card and the terminal to be replaced. These smart cards now acts as a transport medium to and from a central computer (2), a database or a client-server system in a way that is now on-line enabled devices replaced the non-time-critical data in the use of smart card to another become. Examples of advantageous applications are: Use of paycards as a payment medium to service machines (such as ticket vending machines), and settlement with the card issuer. Exchange of telemetry data from devices in the road network (off-line) with a system control center (on-line) by means of a car (mobile data carrier (4)), for example, for the collection of tolls. Access control systems that do not require complex wiring. The access medium is the mobile data carrier (4), the access control point is the off-line station (5) and an appropriately equipped main door represents, for example, the on-line station (1).

19 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
Network Information
Related Institutions (5)
Nokia
28.3K papers, 695.7K citations

90% related

Ericsson
35.3K papers, 584.5K citations

89% related

Alcatel-Lucent
53.3K papers, 1.4M citations

87% related

Fujitsu
75K papers, 827.5K citations

85% related

Bell Labs
59.8K papers, 3.1M citations

84% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20232
20227
202139
202061
201984
201897