Results 61 to 70 of about 22,986,797 (251)
Dynamic identification of moumental and historical minaret of the Sehadet
, 2015 Modal analysis has been used in three decades in the civil engineering disciplines in order to solve complex structural dynamic problems. In this study, dynamic parameter such as fundamental frequency, mode shapes and damping ratios of minaret of Sehadet
Livaoǧlu, Ramazan +2 more
core
, 2019 The assessing of the numerical model of a structure to improve its design is of great importance. When referring to the aircraft dynamic properties, a high accuracy numerical model could be achieved if the modal parameters are compared with those ...
Groth C. +5 more
core +1 more source
‘Guide and Prejudice’— How Argonautes recognize targets across domains of life
FEBS Letters, EarlyView.Argonaute proteins use short nucleic‐acid guides to locate and regulate specific targets across all domains of life. Despite striking diversity—from human gene silencing to bacterial immune defence—all Argonautes share a conserved three‐stage recognition logic: guide‐directed sampling, progressive target pairing with a conformational checkpoint and ...
Jack P. K. Bravo
wiley +1 more source
Bayesian oma of offshore rock lighthouses: Surprises with close modes, symmetry and alignment
, 2019 A set of seven rock lighthouses around the British Isles was studied by a combination of forced and ambient vibration tests executed with some extreme logistical constraints.
Au, Siu Kui (author) +5 more
core
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
Operational modal analysis from flight test data
, 2013 In the framework of the operational modal analysis (OMA), several approaches have been developed for estimating the modal parameters, i.e., natural frequencies, damping ratios, and mode shapes.
COPPOTELLI, Giuliano +2 more
core
Operational Modal Analysis Tutorial
, 2007 In this paper the basic principles in operational modal testing and analysis are presented and discussed. A brief review of the techniques for operational modal testing and identification is presented, and it is argued, that there is now a wide range of techniques for effective identification of modal parameters of practical interest - including the ...
Brincker, Rune, Andersen, Palle
openaire +1 more source
FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
Ambient and forced vibration tests of a box girder concrete bridge model
, 2011 4th International Operational Modal Analysis Conference, IOMAC 2011 -- 9 May 2011 through 11 May 2011 -- -- 110155In this paper, ambient and forced vibration tests of a box girder laboratory con-crete bridge model are described to obtain experimental ...
Bayraktar, A. +2 more
core
FEBS Letters, EarlyView.How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley +1 more source