Results 81 to 90 of about 234,282 (231)

Continuous blood flow visualization with laser speckle contrast imaging during neurovascular surgery

Neurophotonics, 2022
. Significance: Laser speckle contrast imaging (LSCI) has emerged as a promising tool for intraoperative cerebral blood flow (CBF) monitoring because it produces real-time full-field blood flow maps noninvasively and label free.
David R. Miller, R. Ashour, C. Sullender, A. Dunn   +3 more
semanticscholar   +1 more source

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source

Imaging of transient phenomena with low coherence lasers comprising arrays of independent microbeams: A laser version of Harold Edgerton’s stroboscope

APL Photonics, 2022
A longstanding barrier to laser imaging with high spatial and temporal resolution is speckle, the granular interference pattern arising from the coherent interaction of laser radiation with the topography of an illuminated surface.
Austin W. Steinforth, José A. Rivera, J. Gary Eden   +2 more
doaj   +1 more source

Polarization Imperfections of Light in Interferometry [PDF]

, 2009
Disertační práce pojednává o polarizačních nedokonalostech optických komponentů, které jsou využívány ke kontrole a k transformaci polarizačního stavu světla.
Kučera, Petr
core  

Can Ti‐Based MXenes Serve as Solid Lubricants for Brake Applications? A Tribological Study

Advanced Engineering Materials, EarlyView.
This study explores the first implementation of Ti‐based MXenes materials in brake pad friction composite material. The resulting composite material exhibits a 48% reduction in the wear rate; alongside significant improvements are observed for thermal and mechanical properties.
Eslam Mahmoud, Jakob Gruber, Hakan Göçerler, Pierluigi Bilotto, Christian Gierl‐Mayer, Elham Loni, Michael Naguib, Carsten Gachot   +7 more
wiley   +1 more source

Laser Speckle Contrast Imaging of Hepatic Microcirculation [PDF]

Biomedical Optics Express
AbstractThe liver controls blood homeostasis and depends critically on adequate blood supply. While the global regulation of liver blood flow via the hepatic arterial buffer response is well established, the mechanisms governing hepatic sinusoidal hemodynamics remain elusive.
Oleg Zhukov, Dmitry D. Postnov, Kamilla H. Hejn, Kim Ravnskjær, Olga Sosnovtseva   +4 more
openaire   +2 more sources

Imaging obscured subsurface inhomogeneity using laser speckle

Optics Express, 2005
We have developed a laser speckle imaging method to reveal obscured subsurface inhomogeneities that cannot be seen under incoherent illumination. Speckle images of a scattering object were generated under coherent illumination using a laser. A sequence of speckle images was acquired with fixed exposure time and acquisition interval.
Nothdurft, Ralph, Yao, Gang, Ph. D.
openaire   +2 more sources

Vessel packaging effect in laser speckle contrast imaging and laser Doppler imaging [PDF]

Journal of Biomedical Optics, 2017
Laser speckle-based techniques are frequently used to assess microcirculatory blood flow. Perfusion estimates are calculated either by analyzing the speckle fluctuations over time as in laser Doppler flowmetry (LDF), or by analyzing the speckle contrast as in laser speckle contrast imaging (LSCI).
Ingemar, Fredriksson, Marcus, Larsson
openaire   +2 more sources

Engineering Deformation and Failure in Diamond Triply Periodic Minimal Surface Lattices via 3D Wall‐Thickness Grading

Advanced Engineering Materials, EarlyView.
The work demonstrates that strategic wall‐thickness grading in diamond triply periodic minimal surface lattices enables precise tuning of deformation and failure behavior under compression. Different gradation patterns guide how and where the structure collapses, improving energy absorption or promoting controlled brittle failure.
Giovanni Rizza, Danilo Bruson, Manuela Galati, Luca Iuliano   +3 more
wiley   +1 more source

Simultaneous measurement of the microscopic dynamics and the mesoscopic displacement field in soft systems by speckle imaging

, 2013
The constituents of soft matter systems such as colloidal suspensions, emulsions, polymers, and biological tissues undergo microscopic random motion, due to thermal energy.
Brambilla, Giovanni, Caroff, Sami, Cipelletti, Luca, Maccarrone, Simona   +3 more
core   +3 more sources