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Institution

Nokia

CompanyEspoo, Finland
About: Nokia is a company organization based out in Espoo, Finland. It is known for research contribution in the topics: Signal & Mobile station. The organization has 16625 authors who have published 28347 publications receiving 695725 citations. The organization is also known as: Nokia Oyj & Oy Nokia Ab.


Papers
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Journal ArticleDOI
TL;DR: In this framework, attention is focused on the most prominent research efforts in this field with the aim of identifying the causes of such relentless progression through an insightful and critical evaluation of the lithium-ion storage performances.
Abstract: Used as a bare active material or component in hybrids, graphene has been the subject of numerous studies in recent years. Indeed, from the first report that appeared in late July 2008, almost 1600 papers were published as of the end 2015 that investigated the properties of graphene as an anode material for lithium-ion batteries. Although an impressive amount of data has been collected, a real advance in the field still seems to be missing. In this framework, attention is focused on the most prominent research efforts in this field with the aim of identifying the causes of such relentless progression through an insightful and critical evaluation of the lithium-ion storage performances (i.e., 1st cycle irreversible capacity, specific gravimetric and volumetric capacities, average delithiation voltage profile, rate capability and stability upon cycling). The "graphene fever" has certainly provided a number of fundamental studies unveiling the electrochemical properties of this "wonder" material. However, analysis of the published literature also highlights a loss of focus from the final application. Hype-driven claims, not fully appropriate metrics, and negligence of key parameters are probably some of the factors still hindering the application of graphene in commercial batteries.

126 citations

Patent
15 Aug 2012
TL;DR: In this article, a method, apparatus and computer program product are provided to facilitate the use of a multi-segment wearable accessory, such as determining an angle of each of the plurality of segments relative to the axis through the wearable accessory.
Abstract: A method, apparatus and computer program product are provided to facilitate the use of a multi-segment wearable accessory. In this regard, methods, apparatus and computer program products are provided for controlling and, in some instances, interacting with a multi-segment wearable accessory. In the context of a method, an orientation of each of a plurality of segments of a multi-segment wearable accessory is determined relative to an axis through the multi-segment wearable accessory, such as by determining an angle of each of the plurality of segments relative to the axis through the multi-segment wearable accessory. A relative ordering of the plurality of segments of the multi-segment wearable accessory may then be determined based upon the orientation of each of the plurality of segments relative to the axis.

126 citations

Journal ArticleDOI
TL;DR: The results of both simulations and measurements for a dual-band balun are presented, proving the usefulness of the proposed balun and its advantages over alternative means to decrease the cable-related effects.
Abstract: Measurements of the free-space radiation characteristics of small antennas, such as in mobile communications handsets, typically suffer from the influence of the attached radio frequency (RF) feed. A sleeve-like balun choke placed on the feed cable close to the antenna under test (AUT) prevents surface currents of the AUT from propagating onto the outer shield of the RF feed cable. Therefore, measurement results with the balun correspond well to those of an isolated AUT, much better than without any measures against cable effects. The balun can typically be used at a 10% relative bandwidth. A dual-frequency balun minimizes the cable-related effects at two separate frequency bands. This is useful in the measurements of dual-frequency antennas. The results of both simulations and measurements for a dual-band balun are presented in this paper, proving the usefulness of the proposed balun and its advantages over alternative means to decrease the cable-related effects.

126 citations

Patent
10 Sep 1997
TL;DR: The scope of the present invention is an information transfer system and a mobile station (10) connected to it as discussed by the authors, where the radio parts of the mobile station are switched off through either a cable or an infrared connection.
Abstract: The scope of the present invention is an information transfer system and a mobile station (10) connected to it In a system according to the invention a mobile station (10) is connected to a terminal device (40) eg through either a cable or an infrared connection, and the radio parts of the mobile station (10) are switched off Through the terminal device (40), a local network, ATM-network (70, 81, 80, 82) and a network server (90) the mobile station (10) is connected over a wired network to a mobile communication switching center (100) or to a telephone network exchange (110, 130) When the connection from the mobile station (10) to a mobile communication switching center (100) or to a telephone network exchange (110, 130) is broken, the mobile station (10) establishes a connection to a mobile communication switching center (100) by radio in the normal way through a base station (105) and a base station controller (104)

125 citations

Proceedings ArticleDOI
O. Viikki1, D.K. Bye, K. Laurila
12 May 1998
TL;DR: This work proposes a more efficient implementation approach for feature vector normalization where the normalization coefficients are computed in a recursive way and achieves performance gain over 60%, the segmental method approximately 50%, and parallel model combination a 14% overall error rate reduction, respectively.
Abstract: The acoustic mismatch between testing and training conditions is known to severely degrade the performance of speech recognition systems. Segmental feature vector normalization was found to improve the noise robustness of mel-frequency cepstral coefficients (MFCC) feature vectors and to outperform other state-of-the-art noise compensation techniques in speaker-dependent recognition. The objective of feature vector normalization is to provide environment-independent parameter statistics in all noise conditions. We propose a more efficient implementation approach for feature vector normalization where the normalization coefficients are computed in a recursive way. Speaker-dependent recognition experiments show that the recursive normalization approach obtains over 60%, the segmental method approximately 50%, and parallel model combination a 14% overall error rate reduction, respectively. Moreover, in the recursive case, this performance gain is obtained with the smallest implementation costs. Also in speaker-independent connected digit recognition, over a 16% error rate reduction is obtained with the proposed feature vector normalization approach.

125 citations


Authors

Showing all 16635 results

NameH-indexPapersCitations
Federico Capasso134118976957
Andreas Richter11076948262
Shunpei Yamazaki109347666579
Jinsong Huang10529049042
Marc Pollefeys9860136463
Merouane Debbah9665241140
Benjamin J. Eggleton92119534486
Jérôme Faist9197037221
Jean-Pierre Hubaux9041535837
Bernd Girod8760432298
Howard E. Katz8747527991
J.J. Garcia-Luna-Aceves8660225151
Ramesh Raskar8667030675
Ananth Dodabalapur8539427246
Stephen A. Spector8542441705
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20231
202223
2021225
2020465
2019547
2018477