Results 41 to 50 of about 29,052 (301)

Reconfigurable Meta-Coupler Employing Hybrid Metal-Graphene Metasurfaces [PDF]

Scientific Reports, 2020
AbstractEfficient excitation of surface wave (SW) remains one of the most challenging considerations in the photonics and plasmonics areas. Inspired by recent investigations of metasurfaces, we propose a hybrid metal-graphene transmitarray converting incident propagating wave (PW) to SW, as a solution for SW excitations–a meta-coupler.
Tavakol, Mohammad Reza, Khavasi, Amin
openaire   +2 more sources

Coupling characteristics between cylindrical hybrid plasmon waveguide and cylindrical silicon nanowire waveguide

AIP Advances, 2021
Cylindrical waveguides have a wide range of applications in photonic integrated circuits because of lower transmission losses. This paper proposes a directional coupler composed of a cylindrical silicon nanowire waveguide and a metal-based cylindrical ...
Jian-Ping Liu, Wei-Lin Wang, Fang Xie, Chen Li, Xia Zhou, Ji-Hai Yu, Si-Qi Li, Ling-Ling Wang   +7 more
doaj   +1 more source

UDWDM-PON using low-cost coherent transceivers with limited tunability and heuristic DWA [PDF]

, 2016
A new Passive Optical Network (PON) for access, making use of Ultra Dense Wavelength Division Multiplexing (UDWDM) by densely spacing channels at few GHz, and introducing the “wavelength-to-the-user” concept, is proposed.
Polo Querol, Víctor, Prat Gomà, Josep Joan, Sales Zaragozá, Vicente, Segarra Mullerat, Josep, Velásquez Micolta, Juan Camilo   +4 more
core   +2 more sources

Compact Optical 90° Hybrid on a Thin-Film Lithium Niobate Platform Used for Integrated Coherent Transceivers

Photonics
A 90° optical hybrid employing an MMI coupler was fabricated on a thin-film lithium niobate (TFLN) platform that can be used for integrated coherent transceivers. The fabricated 90° optical hybrid exhibited a CMRR greater than 20 dB, a phase error below ±
Haolei Feng, Yuqiong Chen, Zheyuan Shen, Man Chen, Hanyu Wang, Jianguo Liu, Suo Wang, Zeping Zhao   +7 more
doaj   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Distribution of lifetimes of kinetochore-microtubule attachments: interplay of energy landscape, molecular motors and microtubule (de-)polymerization

, 2014
Before a cell divides into two daughter cells, chromosomes are replicated resulting in two sister chromosomes embracing each other. Each sister chromosome is bound to a separate proteinous structure, called kinetochore (kt), that captures the tip of a ...
Chowdhury, Debashish, Sharma, Ajeet K., Shtylla, Blerta   +2 more
core   +1 more source

Hybrid Analog-Digital Precoding Revisited under Realistic RF Modeling [PDF]

, 2016
In this paper we revisit hybrid analog-digital precoding systems with emphasis on their modelling and radio-frequency (RF) losses, to realistically evaluate their benefits in 5G system implementations.
Garcia-Rodriguez, Adrian, Masouros, Christos, Rulikowski, Pawel, Venkateswaran, Vijay   +3 more
core   +2 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Design of a miniaturized 90-degree quadrature hybrid coupler with harmonic suppression ability using π-shaped lumped elements

Scientific Reports
This research presents a new design and fabrication of a quadrature hybrid coupler using π-shaped lumped elements. The proposed π-shaped elements have resulted in ultra-size reduction and harmonic suppression ability simultaneously.
Saeid MahdiAbadi, Saeed Roshani, Fariborz Parandin, Sobhan Roshani   +3 more
doaj   +1 more source

Design of Miniaturized 90-Degree Hybrid Coupler with Wide Rejection Band Using Neural Network

Micromachines
In this paper, a 3 dB 90-degree hybrid coupler with size reduction and harmonics rejection was designed. In the proposed coupler structure, four simple low-pass filters (LPFs) were applied.
Golshan Mohamadpour, Salman Karimi, Saeed Roshani   +2 more
doaj   +1 more source