Results 71 to 80 of about 60,917 (264)

An Epigenetic Fate Converter Based on Nuclei‐Targeting Lipid Nanoparticles Drives Neuronal Programming of Stem Cells for Spinal Cord Repair

Advanced Functional Materials, EarlyView.
Schematic illustration of LNP‐MPG nuclei‐targeting delivery of HMW‐FGF2 promoting histone acetylation to regulate the fate of DPSCs and treat spinal cord injury. LNPs components include pHMW‐FGF2 plasmid, DSPC, Dlin‐MC3‐DMA, cholesterol, and PEG2000, and are modified with MPG to form HMW‐FGF2@LNP‐MPG (HLM). HLM nuclei‐targets DPSCs to deliver HMW‐FGF2,
Heng Zhou, Qiang Qin, Xiqin Li, Hanyu Ding, Chun Xu, Yan He, Qingsong Ye   +6 more
wiley   +1 more source

Ultra-Wideband Multidomain Modulation for Pulse LFM Radar Deception

International Journal of Antennas and Propagation
An ultrawideband multidomain modulation method for pulse linear frequency modulation (LFM) radar deception, leveraging a dynamic Mach–Zehnder modulator (MZM) and fiber delay links, is proposed.
Shixin Long, Hao Ding, Xinglin Qin, Baichi Chen, Xiaoyu Liu, Boqiu Yuan, Song Zha, Mingtuan Lin   +7 more
doaj   +1 more source

Simplified SHE pulse‐amplitude modulation for multilevel inverters

IET Power Electronics, 2018
In this study, a selective harmonic elimination (SHE)‐pulse‐amplitude modulation method is suggested for the cascaded multilevel inverters. This method is based on the balancing of the voltage‐second area under the output voltage waveform and reference sinusoidal signal.
Piyush L. Kamani, Mahmadasraf A. Mulla
openaire   +1 more source

Architecture‐Driven Functional Coupling in Vertically Aligned Nanocomposites

Advanced Functional Materials, EarlyView.
Vertically aligned nanocomposites define a growth‐engineered architecture in which vertical interfaces, strain fields, defect pathways, and phase connectivity are created simultaneously. This review shows how these architectural features couple ferroic, optical, ionic, electrochemical, and device responses, establishing design rules and open challenges
Md Shatil Islam‐Shanto, Javier Zamudio‐García, Abraham Sánchez‐Caballero, David Marrero‐López, Vincenzo Esposito   +4 more
wiley   +1 more source

Covalent Functionalization of 2D Semiconductors: A Roadmap to Advanced Electronic Devices

Advanced Functional Materials, EarlyView.
This Review presents recent advances in the covalent functionalization strategies for two‐dimensional semiconductors and their implementation in modern technologies. Layered materials are modified through diverse molecular chemistries (e.g., thiols, diazonium salts, alkyl halides, and electron‐deficient species) to tailor their surface properties ...
Ramiro Quirós‐Ovies, Bin Han, Paolo Samorì   +2 more
wiley   +1 more source

Capacity of Time-Hopping PPM and PAM UWB Multiple Access Communications over Indoor Fading Channels

EURASIP Journal on Wireless Communications and Networking, 2008
The capacity of time-hopping pulse position modulation (PPM) and pulse amplitude modulation (PAM) for an ultra-wideband (UWB) communication system is investigated based on the multipath fading statistics of UWB indoor wireless channels.
T. Aaron Gulliver, Hao Zhang
doaj   +1 more source

Step-Pulse Modulation of Gain-Switched Semiconductor Pulsed Laser

Applied Sciences, 2019
To improve the peak power and extinction ratio and produce ultra-short pulses, a novel approach is presented in this paper offers a highly effective modulated method for a gain-switched semiconductor laser by using step-pulse signal modulation.
Bin Li, Changyan Sun, Yun Ling, Heng Zhou, Kun Qiu   +4 more
doaj   +1 more source

An Adaptive Inhibitory WSe2 Transistor for Retinomorphic In‐Sensor Image Processing

Advanced Functional Materials, EarlyView.
Conventional retinomorphic devices typically require deliberate gate‐bias tuning for each illumination condition. In this paper, we demonstrate an adaptive inhibitory WSe2 transistor that uses photo‐induced regime shift between the subthreshold and accumulation modes to achieve decision‐free, intensity‐adaptive image processing within a single pixel ...
Juhwan Baek, Junhwa Oh, Hyeonjung Kim, Minsik Park, Haein Cho, Jin Young Park, Hyeonchang Son, Taeyun Kim, Sung‐Un An, Yamin Zhang, Hyeon‐Jin Shin, Seyong Oh, Dong‐Ho Kang   +12 more
wiley   +1 more source

Spectral Efficiency Improved 2D-PAM8 Trellis Coded Modulation for Short Reach Optical System

IEEE Photonics Journal, 2017
This paper proposes and demonstrates a 31.25 Gbps two-dimensional eight level pulse amplitude modulation with trellis coded modulation (2D-PAM8-TCM) transmission in intensity modulation and direct detection based short reach system. In this system,
Yan Fu, Meihua Bi, Da Feng, Xin Miao, Hao He, Weisheng Hu   +5 more
doaj   +1 more source

Multiuser Detection for Pulse Amplitude Modulated Signals

, 2021
Multiuser Detection (MUD) receiver techniques leverage the signal structure of overlapping transmissions to reduce inter-user interference and improve system performance. One main application for MUD research has been reducing inter-user interference in Code-Division Multiple Access (CDMA) channels with performance degradation caused by the near-far ...
openaire   +1 more source