Results 101 to 110 of about 6,760 (299)
Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source
Compact, Wideband, Low-dispersion, Multi-bit MEMS Phase Shifters [PDF]
, 2017 Low-dispersion phase shifters are key components for electrically large phased-array radar and communication systems. Unlike true-time-delay phase shifters with linear dispersion, low-dispersion phase shifters can be designed by switching between right ...
core
Low Resolution Phase Shifters Suffice for Full-Duplex mmWave Communications [PDF]
, 2019 Full-duplex base-stations with half-duplex nodes, allowing simultaneous uplink and downlink from different nodes, have the potential to double the spectrum efficiency without adding additional complexity at mobile nodes.
Barros da Silva Jr., José Mairton, +7 more
core +1 more source
Differential RF-MEMS Enabled Power Divider-Based Phase Shifters
IEEE AccessNew types of co-designed differential RF-MEMS enabled power divider-based phase shifters (PDPSs) are reported. They are based on T-junction power dividers co-integrated with single-pole $N$ -throw (SPNT) RF-MEMS switches that simultaneously control the ...
Zehan Guo +2 more
doaj +1 more source
FEBS Letters, EarlyView.Cancer progression is regulated by the dynamic matrix code of the tumor microenvironment, which influences cellular behavior and disease development. Importantly, matrix remodeling in three‐dimensional cancer models more accurately reflects in vivo conditions compared to conventional two‐dimensional systems.
Sylvia Mangani +3 more
wiley +1 more source
Electronically Scanned Rotman Lens Antenna with Liquid Crystal Phase Shifters [PDF]
, 2013 The performance of a Rotman lens, which forms fixed beams at 0°, ±15° and ±30°, is augmented using liquid crystal phase shifters to simultaneously steer each beam by up to ±7.5°.
Mitchell, Neil +4 more
core +1 more source
Toward the information-theoretic limit of programmable photonics [PDF]
APL PhotonicsThe scalability of many programmable photonic circuits is limited by the 2π tuning range needed for the constituent phase shifters. To address this problem, we introduce the concept of a phase-efficient circuit architecture, where the average phase shift
Ryan Hamerly +4 more
doaj +1 more source
Identification of the plant mitochondrial OrfX protein: A mass spectrometry approach
FEBS Letters, EarlyView.The mitochondrial genome of plants contains an open reading frame, orfx, which encodes a rare protein that has so far escaped mass spectrometric detection. The protein resembles the c‐subunit of bacterial twin‐arginine‐motif‐dependent protein translocases (TatC).
Matthias Döring +3 more
wiley +1 more source
RF MEMS Phase Shifters and their Application in Phase Array Antennas [PDF]
, 2005 Electronically scanned arrays are required for space based radars that are capable of tracking multiple robots, rovers, or other assets simultaneously and for beam-hopping communication systems between the various assets.
Ponchak, George E. +3 more
core +1 more source
Beam Scanning Antenna with Photonically Tuned EBG Phase Shifters [PDF]
, 2006 The rapidly growing communication market demands for powerful and low cost antenna systems operating at micro/mm-wave frequencies. Tunable phase shifters are the key components of steerable antennas.
Chinthana Panagamuwa (1258632) +5 more
core +1 more source