Results 51 to 60 of about 305,381 (270)

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Experiment and Simulation Effects of Cyclic Pitch Control on Performance of Horizontal Axis Wind Turbine

International Journal of Renewable Energy Development, 2017
Offshore wind is generally stronger and more consistent than wind on land. A large part of the offshore wind resource is however located in deep water, where floating wind turbines can harvest more energy. This paper describes a systematic experiment and
Le Quang Sang, Takao Maeda, Yasunari Kamada, Qing'an Li   +3 more
doaj   +1 more source

Codes over Matrix Rings for Space-Time Coded Modulations

, 2010
It is known that, for transmission over quasi-static MIMO fading channels with n transmit antennas, diversity can be obtained by using an inner fully diverse space-time block code while coding gain, derived from the determinant criterion, comes from an ...
Belfiore, Jean-Claude, Oggier, Frederique, Sole, Patrick   +2 more
core   +1 more source

Cyclic LRC codes, binary LRC codes, and upper bounds on the distance of cyclic codes [PDF]

International Journal of Information and Coding Theory, 2016
We consider linear cyclic codes with the locality property, or locally recoverable codes (LRC codes). A family of LRC codes that generalize the classical construction of Reed-Solomon codes was constructed in a recent paper by I. Tamo and A. Barg (IEEE Trans. Inform. Theory, no. 8, 2014).
Itzhak Tamo, Alexander Barg, Sreechakra Goparaju, A. Robert Calderbank   +3 more
openaire   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Structures, Ranks and Minimal Distances of Cyclic Codes over ${\mathbb{Z}}_{p^2}+u{\mathbb{Z}}_{p^2}$

Mathematics
Let p be a prime and Fp a finite field of order p. This paper investigates cyclic codes over the ring Rp2,u=Zp2+uZp2 of order p4, where the nilpotent element u satisfies u2=0 and pu≠0.
Sami H. Saif
doaj   +1 more source

Decoding of Repeated-Root Cyclic Codes up to New Bounds on Their Minimum Distance

, 2015
The well-known approach of Bose, Ray-Chaudhuri and Hocquenghem and its generalization by Hartmann and Tzeng are lower bounds on the minimum distance of simple-root cyclic codes. We generalize these two bounds to the case of repeated-root cyclic codes and
Ulmschneider, Markus, Zeh, Alexander
core   +2 more sources

Transcriptional network analysis of PTEN‐protein‐deficient prostate tumors reveals robust stromal reprogramming and signs of senescent paracrine communication

Molecular Oncology, EarlyView.
Combining PTEN protein assessment and transcriptomic profiling of prostate tumors, we uncovered a network enriched in senescence and extracellular matrix (ECM) programs associated with PTEN loss and conserved in a mouse model. We show that PTEN‐deficient cells trigger paracrine remodeling of the surrounding stroma and this information could help ...
Ivana Rondon‐Lorefice, Jose I. Lopez, Aitziber Ugalde‐Olano, Maite Zufiaurre, Ianire Astobiza, Natalia Martin‐Martin, Laura Bozal‐Basterra, Saioa Garcia‐Longarte, Amaia Zabala‐Letona, Sofia Rey, Aida Santos‐Martin, Miguel Unda, Ana Loizaga‐Iriarte, Mariona Graupera, Paolo Nuciforo, Arkaitz Carracedo, Isabel Mendizabal   +16 more
wiley   +1 more source

Low-complexity quantum codes designed via codeword-stabilized framework

, 2011
We consider design of the quantum stabilizer codes via a two-step, low-complexity approach based on the framework of codeword-stabilized (CWS) codes. In this framework, each quantum CWS code can be specified by a graph and a binary code.
A. G. Fowler, Alexey A. Kovalev, D. Schlingemann, E. M. Rains, F. J. MacWilliams, Ilya Dumer, Leonid P. Pryadko, M. A. Nielsen, M. Grassl, M. Grassl, M. Grassl, M. Hein   +11 more
core   +1 more source

On the decomposition of cyclic codes into cyclic classes

Information and Control, 1971
The problem of finding the cycle representatives of a cyclic code is examined. For an (n, k) cyclic code whose parity check polynomial h(x) consists entirely of factors with exponent n, a complete set of representatives is obtained. Further, if the exponents of the factors of h(x) are relatively prime to each other, a complete set can also be generated.
Stafford E. Tavares, Paul E. Allard, Saligram G. S. Shiva   +2 more
openaire   +1 more source