Results 271 to 280 of about 856,367 (318)

Printed Integrated Logic Circuits Based on Chitosan‐Gated Organic Transistors for Future Edible Systems

Advanced Functional Materials, EarlyView.
Edible electronics needs integrated logic circuits for computation and control. This work presents a potentially edible printed chitosan‐gated transistor with a design optimized for integration in circuits. Its implementation in integrated logic gates and circuits operating at low voltage (0.7 V) is demonstrated, as well as the compatibility with an ...
Giulia Coco, Valerio Francesco Annese, Valerio Galli, Ilaria Penna, Debora Russo, Marina Veronesi, Rita Scarpelli, Stefania Sabella, Mario Caironi   +8 more
wiley   +1 more source

Quantifying Electron and Ion Transfers in Contact Electrification with Ionomers

Advanced Functional Materials, EarlyView.
The concurrent existence of both electron and ion transfers in solid‐ionomer contact electrification is reported. The ion transfer contributes significantly to the process of contact electrification, especially at high humidity, although only less than 2% of ions participate in the ion transfer, suggesting that there is room for further performance ...
Xiaoting Ma, Jiaming Zhou, Eunjong Kim, Jingyi Gao, Wenyi Hu, Dong‐Myeong Shin   +5 more
wiley   +1 more source

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

Advanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner, Julian Burkhart, Kateryna Borysova, Chiara Mazzariol, Klaus Müller‐Buschbaum   +4 more
wiley   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

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Channel and capacity estimation errors

IEEE Communications Letters, 2002
Systems with multiple element transmitter and receiver arrays have been shown to achieve very high spectral efficiencies. The theoretically achievable Shannon capacity is a function of the channel between the transmitters and the receivers. On the simulation level, one assumes certain statistical characteristics for the channel, but on a practical ...
Kyritsi, Persefoni, Cox, D.C., Valenzuela, R.A.   +2 more
openaire   +2 more sources

MIMO Broadcast Channels with Channel Estimation

2007 IEEE International Conference on Communications, 2007
We consider a multi-user MIMO downlink where the transmitter has only estimates of the channel while the receivers have perfect channel information. The impact of channel estimation error on the sum rate is studied. It is shown that the sum rate saturates due to the inaccurate channel information.
Jun Shi, Minnie Ho
openaire   +2 more sources

Channel estimation in fast fading channels

2008 Third International Conference on Communications and Networking in China, 2008
Accurate radio channel estimation is necessary for efficient wireless communications. This paper proposes a novel Kalman filter algorithm using basis expansion models (BEMs) of the channel gains to accurately estimate fast fading channels. The channel state for finite duration blocks is summarized in terms of BEM coefficients.
Michael McGuire, Ping Wan
openaire   +2 more sources

Estimation of Queues at the Channel Tunnel [PDF]

Journal of the Operational Research Society, 1991
The Channel Tunnel, due to open in 1993, will provide a high-speed rail link between Britain and France. In this paper various scenarios are considered relating to the volume of freight which may be transported during the initial years following the opening of the tunnel.
J. D. Griffiths, J. E. Williams, W. Holland   +2 more
openaire   +1 more source

Channel reliability estimation for turbo decoding in rayleigh fading channels with imperfect channel estimates [PDF]

IEEE Communications Letters, 2002
In this letter we propose a simple estimation scheme of the channel reliability factor for turbo decoding in Rayleigh fading channels with imperfect channel estimates. The channel reliability factor is required for iterative MAP decoding of turbo codes and depends on the error variance of the channel estimate as well as the signal-to-noise ratio (SNR ...
Jae Hong Lee, Hyundong Shin
openaire   +1 more source

Channel estimation of DMB-T

IEEE 2002 International Conference on Communications, Circuits and Systems and West Sino Expositions, 2003
A proposed new standard for Chinese DTV is called digital terrestrial multimedia broadcasting (DMB-T). The paper investigates the channel estimation technique of DMB-T. The channel impulse response is obtained by measuring the correlation between the received PN sequence and the locally generated PN sequence.
Zhixing Yang, Lin Yang, Jun Wang, Changyong Pan, Meng Han, Zhouan Han   +5 more
openaire   +2 more sources