Results 121 to 130 of about 606,927 (312)

GNSS Signal Design Approach Considering Receiver Performance [PDF]

open access: yes, 2008
In this work we establish a systematic approach to design optimum chip pulse shapes for DS-CDMA systems which are absolutely band-limited, whose energy is mainly concentrated in one chip duration, and that minimize the Cramer-Rao lower bound for the ...
Antreich, Felix   +2 more
core  

Adaptive minimum symbol error rate beamforming assisted detection for quadrature amplitude modulation [PDF]

open access: yes, 2008
—We consider beamforming assisted detection for multiple antenna aided multiuser systems that employ the bandwidth efficient quadrature amplitude modulation scheme.
Chen, Sheng   +3 more
core   +1 more source

Modulation of STAT6 signaling for hepatoprotection

open access: yesFrontiers in Pharmacology
Signal transducer and activator of transcription (STAT) proteins are a family of seven transcription factors mediating various biological processes. STAT6 is classically known to regulate immune cell biology by transmitting signals from interleukin (IL)-4 and IL-13 into transcriptional activation of genes driving type 2 immunity.
Somm, Emmanuel   +4 more
openaire   +2 more sources

Differential Space-Time Spreading using Four Transmit Antennas and Iteratively Detected Sphere Packing Modulation [PDF]

open access: yes, 2006
This paper presents a novel Differentially encoded Space-Time Spreading (DSTS) scheme using four transmit antennas that can be readily combined with PSK, QAM, as well as Sphere Packing (SP) modulation schemes.
Alamri, O.   +5 more
core   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

open access: yesFEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

The dinucleotide CG as a genomic signalling module [PDF]

open access: yesEpigenetics & Chromatin, 2011
The operon model proposed the existence of a category of proteins that control gene expression by interacting with specific DNA sequences. Since then, a large number of transcription factors recognizing a diversity of sequence motifs have been discovered.
openaire   +4 more sources

Free-space optical communication employing subcarrier modulation and spatial diversity in atmospheric turbulence channel [PDF]

open access: yes, 2008
An expression for the bit error rate of a multiple subcarrier intensity-modulated atmospheric optical communication system employing spatial diversity is derived. Spatial diversity is used to mitigate scintillation caused by atmospheric turbulence, which
Ghassemlooy, Zabih   +9 more
core   +1 more source

Three-to-one analog signal modulation with a single back-bias-controlled reconfigurable transistor. [PDF]

open access: yesNat Commun, 2022
Simon M   +8 more
europepmc   +1 more source

Modelling stem cell differentiation related processes—A practical overview for biologists

open access: yesFEBS Letters, EarlyView.
Stem cell differentiation is complex and difficult to control experimentally. This review introduces suitable computational modelling approaches that can support stem cell research, from mechanistic ODE and abstract models to multiscale and deep learning methods.
Ricco Zeegelaar   +4 more
wiley   +1 more source

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