Results 151 to 160 of about 279 (207)

Mixed Super‐Circles

Computer Graphics Forum, EarlyView.
Abstract We introduce mixed super‐circles, a position‐curvature formulation of the original dynamic 2D super‐helix model. Compared to the latter, purely curvature‐based model – the so‐called chained formulation –, the mixed formulation that we propose here drastically reduces the algorithmic complexity of the solving scheme – from quadratic to quasi ...
Emile Hohnadel, Thibaut Métivet, Florence Bertails‐Descoubes   +2 more
wiley   +1 more source

Dynamic Wave Trains: A Procedural Approach to Spatially Varying Ocean Synthesis

Computer Graphics Forum, EarlyView.
In this paper, we present a high performance procedural model capable of synthesizing and rendering a virtually infinite ocean. Our method exhibits spatial variations as the orientations, speed and choppiness of the waves is parametrized for each frequencies and each point in space. The provided visual abstract exhibits a sunset rendering of a large 40 
Romain Fournier, Arthur Laurain, Pierre Kraemer, Guillaume Gilet, Basile Sauvage   +4 more
wiley   +1 more source

Genetic dissection reveals distinct contributions of the eS31 N‐terminal domain to translational accuracy in Saccharomyces cerevisiae

The FEBS Journal, EarlyView.
The eukaryote‐specific N‐terminal domain (NTD) of eS31 uses two distinct strategies to maintain translation fidelity. During elongation, a positively charged “hotspot” fine‐tunes the selection of incoming aa‐tRNA. During termination, the entire NTD acts as a structural scaffold to ensure the correct positioning of the release factor eRF1.
Qingxuan Gao, Hiroshi Otsuka, Kei Endo, Koichi Ito   +3 more
wiley   +1 more source

PEG400 regulates Falcipain 2 activity through an allosteric mechanism

The FEBS Journal, EarlyView.
Falcipain‐2 can potentially be leveraged as a drug target due to its critical role as a haemoglobinase during the intra‐erythrocytic stage of Plasmodium falciparum. Here, we investigate the regulation of the proteolytic and haemoglobinase activity of falcipain‐2 in the presence of polyethylene glycol.
Bikram Nath, Subhoja Chakraborty, Sampa Biswas   +2 more
wiley   +1 more source

Cryo‐EM structure of GH43 β‐Xylosidase from Enterobacter cloacae provides insights into substrate specificity and the role of an auxiliary domain in enzymatic activity

The FEBS Journal, EarlyView.
Xylan, the second most abundant plant cell wall polysaccharide, is degraded by β‐xylanases and β‐xylosidases. Here, we present the 2.65 Å cryo‐EM structure of Enterobacter cloacae β‐xylosidase (EcXyl43, GH43) and the 2.4 Å X‐ray structure of its inactive F507A mutant.
Lorenzo Briganti, Andre Schutzer Godoy, Caio Cesar Mello Capetti, Rafaela Sachetto Fernandes, Vanessa O. A. Pellegrini, Ornella M. Ontañon, Eleonora Campos, Rodrigo V. Portugal, Igor Polikarpov   +8 more
wiley   +1 more source

Structural insights into tyrosine sulfation of CCR5 by human tyrosylprotein sulfotransferase‐1

The FEBS Journal, EarlyView.
Structural analysis of human tyrosylprotein sulfotransferase‐1 (hTPST1) bound to a CCR5 N‐terminal peptide reveals how hTPST1 recognizes the Tyr3 sulfation site. Structure‐guided models of additional CCR5 sulfation states and full‐length assemblies provide a framework for understanding CCR5 tyrosine sulfation, a post‐translational modification relevant
Shinnosuke Tanaka, Hirai Asano, Kota Toyoda, Toshiaki Nishiyori, Hidetaka Kojo, Kazuto Kiyomatsu, Katsuhisa Kurogi, Yoichi Sakakibara, Etsuko Nishimoto, Takamasa Teramoto, Yoshimitsu Kakuta   +10 more
wiley   +1 more source

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Superposition codes for mismatched decoding

2013 IEEE International Symposium on Information Theory, 2013
An achievable rate is given for discrete memoryless channels with a given (possibly suboptimal) decoding rule. The result is obtained using a refinement of the superposition coding ensemble. The rate is tight with respect to the ensemble average, and can be weakened to the LM rate of Hui and Csiszar-Korner, and to Lapidoth's rate based on parallel ...
Jonathan Scarlett, Alfonso Martinez, Albert Guillen i Fabregas   +2 more
openaire   +1 more source

Superposition coding in the combination network

2016 IEEE International Symposium on Information Theory (ISIT), 2016
We present an inner bound for the combination network based on superposition coding and partial interference decoding. This inner bound is tight in the three-user and K-user symmetric cases, where capacity has been previously characterized. However, unlike previous achievability schemes, the scheme presented herein does not require network coding.
Henry P. Romero, Mahesh Kumar Varanasi
openaire   +1 more source

Implementation of Sparse Superposition Codes

IEEE Transactions on Signal Processing, 2017
Sparse superposition codes (SSCs) are capacity achieving codes whose decoding process is a linear sensing problem. Decoding approaches thus exploit the approximate message passing algorithm, which has been proven to be effective in compressing sensing.
Carlo Condo, Warren J. Gross
openaire   +1 more source

Superposition coding in rewritable channels

2010 Information Theory and Applications Workshop (ITA), 2010
We introduce the notions of superposition coding and sequential decoding in the context of rewritable channels. Using these concepts we will show that for k 1 > k 0 , C(k 1 ) ≥ C(k 0 )+log(k1/k0), where C(·) is the capacity of the rewritable channel for a given cost. A consequence of this result is that C(k) ≥ C(1) + log k, where C(1) is the classical
L. A. Lastras-Montao, Thomas Mittelholzer, Michele Franceschini   +2 more
openaire   +1 more source