Results 61 to 70 of about 764,924 (322)

Joint measurements through quantum broadcasting [PDF]

arXiv, 2022
We study generating joint measurements by operating on the input quantum state with a broadcasting channel followed by local measurements on the two outputs of the broadcasting channel. Although, due to perfect broadcasting or cloning being impossible, this scheme cannot generate perfect joint observables for all pairs of quantum observables, we study ...
arxiv  

Insertion of the FeB cofactor in cNORs lacking metal inserting chaperones

FEBS Letters, EarlyView.
Nitric oxide reductase is an enzyme found in the bacterial denitrification pathway. The NOR active site contains a non‐heme iron, often, but not always inserted with the assistance of chaperones. Here, we study the insertion of FeB in the subfamily of cNORs lacking chaperones and found a putative channel, conserved in the family, perhaps enabling the ...
Sofia Appelgren, Pia Ädelroth
wiley   +1 more source

Observability and observers in a food web

Applied Mathematics Letters, 2007
The problem of the possibility to recover the time-dependent state of a whole population system out of the observation of certain components has been studied in earlier publications, in terms of the observability concept of mathematical systems theory. In the present note a method is proposed to effectively calculate the state process.
López García, María Inmaculada, Gámez Cámara, Manuel Angel, Molnár, S.   +2 more
openaire   +3 more sources

Structural and mechanistic basis for the regulation of the chloroplast signal recognition particle by (p)ppGpp

FEBS Letters, EarlyView.
LHCPs are transported to the thylakoid membrane via the (cp)SRP pathway. This process involves a transit complex of (cp)SRP43, (cp)SRP54 and LHCP, which interacts with (cp)FtsY and Alb3 at the membrane. GTP hydrolysis by (cp)SRP54 and (cp)FtsY triggers complex dissociation.
Victor Zegarra, Paul Weiland, Pauline Anka Plitzko, Julia Thiery, Laura Czech, Felix Willmund, Patricia Bedrunka, Gert Bange   +7 more
wiley   +1 more source

The Influence of Attitude Dilution of Precision on the Observable Degree and Observability Analysis With Different Numbers of Visible Satellites in a Multi-Antenna GNSS/INS Attitude Determination System

IEEE Access, 2018
The observability and observable degree of attitude errors in tightly coupled global navigation satellite system/inertial navigation system attitude determination system are studied in this paper.
Yong Wang, Xiubin Zhao, Chunlei Pang, Bo Feng, Liang Zhang   +4 more
doaj   +1 more source

Towards a minimal order distributed observer for linear systems [PDF]

arXiv, 2017
In this paper we consider the distributed estimation problem for continuous-time linear time-invariant (LTI) systems. A single linear plant is observed by a network of local observers. Each local observer in the network has access to only part of the output of the observed system, but can also receive information on the state estimates of its neigbours.
arxiv  

Observations for Reanalyses [PDF]

Bulletin of the American Meteorological Society, 2018
AbstractGlobal dynamical reanalyses of the atmosphere and ocean fundamentally rely on observations, not just for the assimilation (i.e., for the definition of the state of the Earth system components) but also in many other steps along the production chain.
Brönnimann, Stefan, Allan, Rob, Atkinson, Christopher, Buizza, Roberto, Bulygina, Olga, Dahlgren, Per, Dee, Dick, Dunn, Robert, Gomes, Pedro, John, Viju O., Jourdain, Sylvie, Haimberger, Leopold, Hersbach, Hans, Kennedy, John, Poli, Paul, Pulliainen, Jouni, Rayner, Nick, Saunders, Roger, Schulz, Jörg, Sterin, Alexander, Stickler, Alexander, Titchner, Holly, Valente, Maria Antonia, Ventura, Clara, Wilkinson, Clive   +24 more
openaire   +3 more sources

Taurine promotes glucagon‐like peptide‐1 secretion in enteroendocrine L cells

FEBS Letters, EarlyView.
Taurine, a sulfur‐containing amino acid, is likely taken up by enteroendocrine L cells via the taurine transporter. This process increases the levels of cytosolic ATP. The increase in intracellular Ca2+ concentrations and glucagon‐like peptide‐1 secretion through membrane depolarization is caused by the closure of ATP‐sensitive potassium channels ...
Yuri Osuga, Kazuki Harada, Takuya Yamauchi, Tetsuya Kitaguchi, Masami Yokota Hirai, Mitsuharu Matsumoto, Takashi Tsuboi   +6 more
wiley   +1 more source

Molecular quantum mechanical observers, symmetry, and string theory [PDF]

arXiv, 2010
The paper \cite{Dance0601} tentatively suggested a physical picture that might underlie string theories. The string parameters $\tau $ and $\sigma_i $ were interpreted as spacetime dimensions which a simple quantum mechanical observer can observe, while symmetries of the relevant observer states could limit the observability of other dimensions.
arxiv  

The multiple roles of the NlpC_P60 peptidase family in mycobacteria – an underexplored target for antimicrobial drug discovery

FEBS Letters, EarlyView.
The NlpC_P60 superfamily of peptidases is recognised by its key role in bacterial cell wall homeostasis. Recently, studies have also described the involvement of NlpC_P60‐like enzymes in bacterial competitive mechanisms and pathogenesis across several lineages.
Catharina dos Santos Silva, Marcio Vinicius Bertacine Dias   +1 more
wiley   +1 more source