Results 111 to 120 of about 555,563 (301)

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

Advanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong, Changfan Xu, Huaping Zhao, Yong Lei   +3 more
wiley   +1 more source

New VR magnification ratios of QSO 0957+561

, 2004
We present VR magnification ratios of QSO 0957+561, which are inferred from the GLITP light curves of Q0957+561A and new frames taken with the 2.56m Nordic Optical Telescope about 14 months after the GLITP monitoring.
A. Oscoz, A. Ullan, E. Mediavilla, Garrett M. A., J. A. Munoz, J. Gonzalez‐Cadelo, L. J. Goicoechea, M. Serra‐Ricart, Pelt J., R. Gil‐Merino, Refsdal S., Schmidt R., Wambsganss J.   +12 more
core   +1 more source

Micropatterned Biphasic Printed Electrodes for High‐Fidelity on‐Skin Bioelectronics

Advanced Functional Materials, EarlyView.
Micropatterned biphasic printed electrodes achieve unprecedented skin conformity and low impedance by combining liquid‐metal droplets with microstructured 3D lattices. This scalable approach enables high‐fidelity detection of ECG, EMG, and EEG signals, including alpha rhythms from the forehead, with long‐term comfort and stability.
Manuel Reis Carneiro, Telmo Lopes, André F. Silva, Carmel Majidi, Mahmoud Tavakoli   +4 more
wiley   +1 more source

An empirical study of ISAC channel characteristics with human target impact at 105 GHz

Electronics Letters
Leveraging the ultra‐wideband advantages of the terahertz band, Integrated sensing and communication (ISAC) facilitates high‐precision sensing demands in human smart home applications.
Wenjun Chen, Yuxiang Zhang, Yameng Liu, Jianhua Zhang, Huiwen Gong, Tao Jiang, Liang Xia   +6 more
doaj   +1 more source

Performance comparison of power delay profile Estimation for MIMO OFDM

IOSR Journal of Engineering, 2014
A multiple-input multiple-output (MIMO) communication system combined with the orthogonal frequency division multiplexing (OFDM) modulation technique can achieve reliable high data rate transmission over broadband wireless channels. In linear minimum mean square error channel (MSE) estimation for multicarrier system, it is necessary to know channel ...
openaire   +1 more source

Characteristics of profiles of gamma-ray burst pulses associated with the Doppler effect of fireballs

, 2004
In this paper, we derive in a much detail the formula of count rates, in terms of the integral of time, of gamma-ray bursts in the framework of fireballs, where the Doppler effect of the expanding fireball surface is the key factor to be concerned ...
Fenimore E. E., Fu‐Wen Zhang, Xiao‐Hong Cui, Yi‐Ping Qin, Zhi‐Bin Zhang   +4 more
core   +1 more source

Prospects of Electric Field Control in Perpendicular Magnetic Tunnel Junctions and Emerging 2D Spintronics for Ultralow Energy Memory and Logic Devices

Advanced Functional Materials, EarlyView.
Electric control of magnetic tunnel junctions offers a path to drastically reduce the energy requirements of the device. Electric field control of magnetization can be realized in a multitude of ways. These mechanisms can be integrated into existing spintronic devices to further reduce the operational energy.
Will Echtenkamp, Brahmdutta Dixit, Yifei Yang, Deyuan Lyu, Thomas Peterson, Qi Jia, Yu‐Chia Chen, Jian‐Ping Wang   +7 more
wiley   +1 more source

Potential Accuracy of Echo-Signal Delay Measurement by Space-Based Radar Altimeter

Известия высших учебных заведений России: Радиоэлектроника, 2017
Satellite radar altimetry is a universal tool for global all-weather monitoring of the surface of the Earth. Substantial contribution to the satellite altimeter error is made by a component associated with noise and random nature of the echo-signal ...
D. S. Borovitsky, A. E. Zhesterev, V. P. Ipatov, R. M. Mamchur   +3 more
doaj  

Controlled Aggregation of Pyrene‐Based Supramolecular Nanostructures for Light‐Driven Switchable H2 or H2O2 Production

Advanced Functional Materials, EarlyView.
This work reports the self‐assembly of a pyrene derivative into two distinct nanostructures and their application in visible‐light photocatalysis. The two nanostructures exhibit completely different yet complementary photocatalytic activities, promoting either H2 or H2O2 evolution.
Marianna Barbieri, Matilde Doardo, Ilaria Fortunati, Anna Fortunato, Elisabetta Collini, Francesca Arcudi, Luka Ðorđević   +6 more
wiley   +1 more source

Characteristic Analysis and Modeling of Train-to-Train Wireless Channel in Station Scenario

International Journal of Antennas and Propagation
In this paper, ray tracing (RT) is used to analyze the characteristics of train-to-train (T2T) wireless channel in 2.1 GHz frequency band, including path loss, multipath clustering, delay spread, Rice factor, angular spread, and channel nonstationarity ...
Yingfei Liu, Lei Xiong, Dan Fei, Rui Liu, Endale Legesse Habte   +4 more
doaj   +1 more source