Results 51 to 60 of about 169,669 (288)

Medium-Wave Infrared Static Fourier Transform Spectrometer Based on Micro-Optical Elements

IEEE Access, 2021
In recent years, various fields have established an urgent need for real-time online measurement of infrared spectra. To this end, reducing the weight and size of infrared spectrometers is particularly important.
Yupeng Chen, Jinguang Lv, Baixuan Zhao, Jin Tao, Yuxin Qin, Weibiao Wang, Jingqiu Liang   +6 more
doaj   +1 more source

Image sharpening metrics and search strategies for indirect adaptive optics [PDF]

, 2000
Adaptive optics is concerned with the correction of turbulence induced aberrations and mis-alignments in optical systems. It is an expensive and complicated technology which has been developed for astronomy and defence applications.
Doble, N., Doble, Nathan
core  

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Joint Dense 3D Reconstruction Method for Endoscopic Images of Weak Texture Scenes

IEEE Access, 2021
Endoscopic inspection is an important non-destructive testing method. Traditional 3D endoscopic reconstruction methods, such as polarization reconstruction and shading reconstruction, have the drawbacks of not determining the object’s actual size ...
Yunting Gu, Jinguang Lv, Jian Bo, Baixuan Zhao, Yupeng Chen, Jin Tao, Yuxin Qin, Weibiao Wang, Jingqiu Liang   +8 more
doaj   +1 more source

Interferometric nulling of four channels with integrated optics

, 2022
S.7449-7454Nulling interferometry has been identified as a competitive technique for the detection of extrasolar planets. In its basic form, the technique consists of combining out-of-phase a single pair of telescopes to effectively null the light of a ...
Pertsch, Thomas, Errmann, Ronny, Minardi, Stefano, Muthusubramanian, Balaji, Nolte, Stefan, Dreisow, Felix, Labadie, Lucas   +6 more
core   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Imaging arbitrary incoherent source distributions with near quantum-limited resolution

Scientific Reports, 2022
We demonstrate an approach to obtaining near quantum-limited far-field imaging resolution of incoherent sources with arbitrary distributions. Our method assumes no prior knowledge of the source distribution, but rather uses an adaptive approach to ...
Erik F. Matlin, Lucas J. Zipp
doaj   +1 more source

Micro-machined membrane deformable mirrors for cryogenic adaptive optics [PDF]

, 2002
In this Thesis, the suitability of 37 actuator Micro-machined membrane deformable mirrors (MMDM) for adaptive optics at cryogenic temperatures is evaluated. A method is described to safely cool MMDMs to 78K. The initial surface figures of three MMDMs are
Dyson, H.M., Dyson, Harold Michael
core  

Roadmap on transformation optics [PDF]

, 2018
Transformation Optics asks Maxwell’s equations what kind of electromagnetic medium recreate some smooth deformation of space. The guiding principle is Einstein’s principle of covariance: that any physical theory must take the same form in any ...
John B Pendry, Horsley, SAR, Philippe Tassin, Horsley, Simon, Martini, Enrica, Smolyaninova, Vera N., Ginis, Vincent, Andrew M Weiner, Quevedo-Teruel, O, Minatti, Gabriele, Paul Kinsler, Galdi, Vincenzo, Quevedo-Teruel, Oscar, Thompson, Robert T., Smolyaninova, Vera N.,, Pendry, John, Hao, Yang, Gratus, J, Martin McCall, McCall, M, Ebrahimpouri, Mahsa, Smolyaninova, Vera, Ulf Leonhardt, Hao, Yang,, Cummer, SA, Igor I Smolyaninov, Muamer Kadic, Leonhardt, U, Kadic, Muamer, Yang Hao, Mitchell-Thomas, Rhiannon, Li, Jensen,, Lai, Y, Vincenzo Galdi, Hao, Y, McCall, Martin,, Gratus, Jonathan, Minatti, G, Rhiannon C Mitchell-Thomas, Pendry, JB, Kinsler, Paul,, Robert T Thompson, Mahsa Ebrahimpouri, Zhu, Jian, Lukens, JM, Ginis, V, Smolyaninov, II, Oscar Quevedo-Teruel, Ginis, Vincent,, Pendry, John B., Zhu, Jain, Martini, E, Maci, S, Kinsler, Paul, Smolyaninov, Igor I, Stefano Maci, Lai, Yun, Horsley, S. A. R., Li, Jensen, Mitchell-Thomas, Rhiannon C., Steven A Cummer, Tassin, Philippe,, Maci, Stefano, Cummer, Steven, Lukens, Joseph M, Martin Wegener, Lukens, Joseph, Cummer, Steven A.,, Weiner, Andrew M.,, Thompson, Robert T.,, Zhu, J, McCall, Martin, Wegener, Martin,, Cummer, Steven A., Pendry, John B.,, Gratus, Jonathan,, Enrica Martini, S A R Horsley, Lukens, Joseph M.,, Joseph M Lukens, Manatti, Gabriele, Jonathan Gratus, Tassin, Philippe, Jensen Li, Leonhardt, Ulf,, Horsely, Simon, Smolyaninova, VN, Lai, Yun,, Leonhardt, Ulf, Lukens, Joseph M., Jian Zhu, Weiner, Andrew M., Li, J, Weiner, Andrew, Yun Lai, Mitchell-Thomas, RC, Smolyaninov, Igor I.,, Vincent Ginis, Horsley, S. A. R.,, Galdi, Vincenzo,, Weiner, AM, Weiner, Andrew M, Wegener, Martin, Vera N Smolyaninova, Horsley, S. A.R., Mitchell-Thomas, Rhiannon C.,, Minatti, Gabriele,, Zhu, Jian,, Ebrahimpouri, M, Kadic, M, Smolyaninov, Igor I., Tassin, P, Thompson, RT, Gabriele Minatti, Ebrahimpouri, Mahsa,, Martini, Enrica,, Galdi, V, Quevedo-Teruel, Oscar,, Thompson, Robert, Pendy, John, Kinsler, P, Wegener, M, Smolyaninov, Igor, Maci, Stefano,, Kadic, Muamer,   +124 more
core   +1 more source

Organizing the interface—Plasma membrane architecture and receptor dynamics in virus‐cell interactions

FEBS Letters, EarlyView.
Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley   +1 more source