scholarly journals Multilayer silicone phantoms for the evaluation of quantitative optical techniques in skin imaging

2010 ◽  
Author(s):  
Rolf B. Saager ◽  
Clement Kondru ◽  
Kendrew Au ◽  
Kelly Sry ◽  
Frederick Ayers ◽  
...  
Keyword(s):  
Optical Techniques ◽  
Skin Imaging ◽  
Silicone Phantoms

Comparison between the tilted SmC?* and SmC?* phases of MHPOBC studied by optical techniques

1994 ◽  
Vol 4 (12) ◽  
pp. 2149-2159 ◽  
Author(s):  
John Philip ◽  
Jean-Ren� Lalanne ◽  
Jean-Paul Marcerou ◽  
Gilles Sigaud
Keyword(s):  
Optical Techniques

scholarly journals An Improved Lagrangian-Inverse Method for Evaluating the Dynamic Constitutive Parameters of Concrete

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1871
Author(s):  
Xinlu Yu ◽  
Yingqian Fu ◽  
Xinlong Dong ◽  
Fenghua Zhou ◽  
Jianguo Ning
Keyword(s):  
High Speed ◽  
Inverse Method ◽  
Image Correlation ◽  
Analysis Method ◽  
Stress Strain ◽  
Optical Techniques ◽  
Element Simulation ◽  
Non Linear ◽  
Constitutive Parameters ◽  
Inverse Analysis Method

The dynamic constitutive behaviors of concrete-like materials are of vital importance for structure designing under impact loading conditions. This study proposes a new method to evaluate the constitutive behaviors of ordinary concrete at high strain rates. The proposed method combines the Lagrangian-inverse analysis method with optical techniques (ultra-high-speed camera and digital image correlation techniques). The proposed method is validated against finite-element simulation. Spalling tests were conducted on concretes where optical techniques were employed to obtain the high-frequency spatial and temporal displacement data. We then obtained stress–strain curves of concrete by applying the proposed method on the results of spalling tests. The results show non-linear constitutive behaviors in these stress–strain curves. These non-linear constitutive behaviors can be possibly explained by local heterogeneity of concrete. The proposed method provides an alternative mean to access the dynamic constitutive behaviors which can help future structure designing of concrete-like materials.

scholarly journals Determination of non-linear refractive index of laser crystals and ceramics via different optical techniques

2020 ◽  
Vol 8 ◽  
pp. 100065
Author(s):  
Laurent Lamaignère ◽  
Guido Toci ◽  
Barbara Patrizi ◽  
Matteo Vannini ◽  
Angela Pirri ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Techniques ◽  
Linear Refractive Index ◽  
Non Linear ◽  
Laser Crystals

Novel electro-optical techniques in metrology

1976 ◽  
Vol 22 (1) ◽  
pp. 27 ◽  
Author(s):  
L. Balmer ◽  
A.H. Falkner ◽  
W.N. Taberner
Keyword(s):  
Optical Techniques

scholarly journals The Aftermath of a Hepatic Artery Aneurysm—A Rare Etiology of Biliary Obstruction!

2017 ◽  
Vol 10 ◽  
pp. 117955221771143 ◽  
Author(s):  
Catherine Linzay ◽  
Abhishek Seth ◽  
Kunal Suryawala ◽  
Ankur Sheth ◽  
Moheb Boktor ◽  
...  
Keyword(s):  
Obstructive Jaundice ◽  
Hepatic Artery ◽  
Significant Risk ◽  
Artery Aneurysm ◽  
Biliary Tree ◽  
Visceral Artery ◽  
Biliary Stenting ◽  
Hepatic Artery Aneurysm ◽  
Skin Imaging ◽  
Visceral Artery Aneurysms

Background: Hepatic artery aneurysms (HAAs) constitute 14% to 20% of visceral artery aneurysms. Most HAAs are asymptomatic. Although rare, obstructive jaundice due to external bile duct compression or rupture of the HAA into the biliary tree with occlusion of the lumen from blood clots has been reported. Case presentation: A 56-year-old white man presented to an outside hospital with symptoms of obstructive jaundice, including abdominal pain and yellowing of the skin. Imaging showed a large HAA. Patient was transferred to our hospital where an endoscopic retrograde cholangiopancreatography with biliary stenting was performed. This was followed by coil embolization of the HAA with improvement in symptoms and liver chemistries. Conclusions: Most clinicians agree that management of HAA is highly variable and depends on clinical presentation and anatomic location. Biliary stenting provides temporary relief for patients with obstructive jaundice. Definitive options include open aneurysmal repair versus endovascular therapy. Hepatic artery aneurysms represent a significant risk for hemorrhage and therefore must be addressed promptly once discovered.

New optical techniques to improve the visibility of graphene on multiple substrates

2011 ◽  
Author(s):  
Hugo Gonçalves ◽  
Peter Schellenberg ◽  
Michael Belsley ◽  
Luís Alves ◽  
Cacilda Moura ◽  
...  
Keyword(s):  
Optical Techniques ◽  
Multiple Substrates

Optical techniques for perfusion monitoring of the gastric tube after esophagectomy: a review of technologies and thresholds

2018 ◽  
Vol 31 (6) ◽  
Author(s):  
S M Jansen ◽  
D M de Bruin ◽  
M I van Berge Henegouwen ◽  
S D Strackee ◽  
D P Veelo ◽  
...  
Keyword(s):  
Gastric Tube ◽  
Optical Techniques
Sign in / Sign up

Export Citation Format

Share Document