Results 51 to 60 of about 1,677,217 (347)
Pattern Synthesizing of the Concentric Ring Arrays Using Recursive Least Square Method [PDF]
arXiv, 2023 This letter presents a recursive technique to synthesize the array factor (AF) of a concentric ring array. In this method, first, the problem is modeled using the traditional least square method (LSM). In the second step, a recursive technique is applied to the defined problem.
arxiv
Sparse Array Beamforming Design for Wideband Signal Models [PDF]
, 2020 We develop sparse array receive beamformer design methods achieving maximum signal-to-interference plus noise ratio (MaxSINR) for wideband sources and jammers. Both tapped delay line (TDL) filtering and the DFT realizations to wideband array processing are considered.
arxiv +1 more source
Image formation in synthetic aperture radio telescopes
, 2010 Next generation radio telescopes will be much larger, more sensitive, have much larger observation bandwidth and will be capable of pointing multiple beams simultaneously. Obtaining the sensitivity, resolution and dynamic range supported by the receivers
Leshem, Amir, Levanda, Ronny
core +1 more source
Robust symmetric multiplication for programmable analog VLSI array processing [PDF]
, 2006 This paper presents an electrically programmable analog multiplier. The circuit performs the multiplication between an input variable and an electrically selectable scaling factor. The multiplier is divided in several blocks: a linearized transconductor,
Carmona Galán, Ricardo +3 more
core +1 more source
Human colon organoid differentiation from induced pluripotent stem cells using an improved method
FEBS Letters, Volume 599, Issue 6, Page 912-924, March 2025.We compared established protocols to differentiate induced pluripotent stem cells into colon organoids and found that activation of bone morphogenetic protein 2 signaling induced gene expression of colon‐specific markers. Adenovirus‐mediated transduction of the transcription factors HOXD13 or SATB2 further enhanced colonic gene expression, suggesting ...
I‐Ting Lee +4 more
wiley +1 more source
FEBS Letters, Volume 599, Issue 6, Page 876-891, March 2025.We explore 5HT2A receptor activation, a key target for psychedelic drugs, using molecular dynamics simulations. Without Gqα, the active receptor collapses to an inactive conformation, underscoring the G‐protein's role. Discovery of an intermediate “partially‐open” state and the higher affinity of ligands to the orthosteric binding site provides ...
Niklas Viohl +2 more
wiley +1 more source
Sparse Sensing with Semi-Coprime Arrays [PDF]
, 2018 A semi-coprime array (SCA) interleaves two undersampled uniform linear arrays (ULAs) and a $Q$ element standard ULA. The undersampling factors of the first two arrays are $QM$ and $QN$ respectively where $M$ and $N$ are coprime. The resulting non-uniform linear array is highly sparse.
arxiv +1 more source
FEBS Letters, Volume 599, Issue 8, Page 1159-1168, April 2025.In modular polyketide synthases, the dehydratase (DH) domain catalyzes the dehydration reaction of the β‐hydroxyacyl unit attached to the cognate acyl carrier protein (ACP) domain. However, it is unclear how DH interacts with ACP during the reaction. In this study, we identified DH–ACP interface residues, providing the first detailed insights into DH ...
Kaede Kotagiri +8 more
wiley +1 more source
IEEE Access, 2020 Many positioning and tracking applications use spatially distributed sensor stations, each equipped with coherent measurement channels. The coherent data set of each node is incoherently measured to the data sets of all other nodes, avoiding expensive ...
Markus Hehn, Erik Sippel, Martin Vossiek
doaj +1 more source
A mixed-signal early vision chip with embedded image and programming memories and digital I/O [PDF]
, 2003 From a system level perspective, this paper presents a 128 × 128 flexible and reconfigurable Focal-Plane Analog Programmable Array Processor, which has been designed as a single chip in a 0.35μm standard digital 1P-5M CMOS technology. The core processing
Domínguez Castro, Rafael +3 more
core +1 more source