Results 61 to 70 of about 940,971 (329)

Binary phase-shift keying by coupling modulation of microrings

Optics Express, 2014
We propose a coupling-modulated microring in an add-drop configuration for binary phase-shift keying (BPSK), where data is encoded as 0 and π radian phase-shifts on the optical carrier. The device uses the π radian phase-flip across the zero coupling point in a 2 × 2 Mach-Zehnder interferometer coupler to produce the modulation.
Wesley D, Sacher, William M J, Green, Douglas M, Gill, Solomon, Assefa, Tymon, Barwicz, Marwan, Khater, Edward, Kiewra, Carol, Reinholm, Steven M, Shank, Yurii A, Vlasov, Joyce K S, Poon   +10 more
openaire   +2 more sources

Interplay between circadian and other transcription factors—Implications for cycling transcriptome reprogramming

FEBS Letters, EarlyView.
This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley   +1 more source

Effects of phase noise on subcarrier modulation performance over Malaga turbulence channel

Tongxin xuebao, 2018
The performance of wireless optical system employing subcarrier phase-shift keying modulation was researched,which was influenced by phase noise of system demodulator under on Malaga atmospheric turbulence channel.Combined Fourier series and MeijerG ...
Xizheng KE, Chenhao WANG, Dan CHEN
doaj   +2 more sources

A Multichannel Phase Tunable Microwave Photonic Mixer With High Conversion Gain and Elimination of Dispersion-Induced Power Fading

IEEE Photonics Journal, 2018
A microwave photonic system that can realize frequency up- and down-conversion, multichannel phase shift, high conversion gain, and elimination of dispersion-induced power fading is proposed and experimentally demonstrated.
Weile Zhai, Aijun Wen, Wu Zhang, Zhaoyang Tu, Huixing Zhang, Zhongguo Xiu   +5 more
doaj   +1 more source

Reproducing single-carrier digital modulation schemes for VLC by controlling the first switching harmonic of the dc-dc power converter output voltage ripple [PDF]

, 2018
A DC-DC power converter based on a two-phase synchronous buck converter that reproduces single-carrier digital modulation schemes by controlling the first switching harmonic of the output voltage ripple is presented in this work.
Fernández Miaja, Pablo, González Lamar, Diego, Rodríguez Méndez, Juan, Sebastián Zúñiga, Francisco Javier   +3 more
core   +2 more sources

The role of histone modifications in transcription regulation upon DNA damage

FEBS Letters, EarlyView.
This review discusses the critical role of histone modifications in regulating gene expression during the DNA damage response (DDR). By modulating chromatin structure and recruiting repair factors, these post‐translational modifications fine‐tune transcriptional programmes to maintain genomic stability.
Angelina Job Kolady, Siyao Wang
wiley   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Comprehensive Analysis and Gain Derivation of Phase-Shifted Dual-Input LLC Converter

IEEE Access, 2022
This paper presents a comprehensive time-domain analysis of the dual-input LLC converter. By utilizing PSM and FSM, the converter power stage interfaces two photovoltaic (PV) panels to achieve maximum power point tracking (MPPT).
Abdullah Alhatlani, Sumana Ghosh, Issa Batarseh   +2 more
doaj   +1 more source

Accurate control of a liquid-crystal display to produce a homogenized Fourier transform for holographic memories [PDF]

, 2007
We show an accurate procedure to obtain a Fourier transform (FT) with no dc term using a commercial twisted-nematic liquid-crystal display. We focus on the application to holographic storage of binary data pages, where a drastic decrease of the dc term ...
Alvarez, Mariela L., Beléndez, Augusto, Fernandez-Varo, Helena, Gallego, Sergi, Márquez, Andrés, Méndez Alcaraz, David Israel, Neipp, Cristian, Ortuño, Manuel, Pascual, Inmaculada   +8 more
core   +2 more sources

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

FEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman, Anna E. Lester, Brian D. Zoltowski   +2 more
wiley   +1 more source