Results 51 to 60 of about 658,110 (323)

ABCD matrix for reflection and refraction of laser beam at tilted concave and convex elliptic paraboloid interfaces and studying laser beam reflection from a tilted concave parabola of revolution [PDF]

Journal of Electrical and Computer Engineering Innovations, 2015
Studying Gaussian beam is a method to investigate laser beam propagation and ABCD matrix is a fast and simple method to simulate Gaussian beam propagation in different mediums.
M. Mansour Abadi, Z. Ghassemlooy, D. Smith, W. Pang Ng   +3 more
doaj   +1 more source

Free Space Optical Polarization De-multiplexing and Multiplexing by means of Conical Refraction [PDF]

, 2012
Polarization de-multiplexing and multiplexing by means of conical refraction is proposed to increase the channel capacity for free space optical communication applications.
Kalkandjiev, Todor K., Loiko, Yurii, Mompart, Jordi, Turpin, Alex   +3 more
core   +3 more sources

Mental Representations and Cognitive Schemata of Ninth Grade Students for the Refraction of Light

Education Sciences, 2023
The current research study deals with students’ mental representations and cognitive schemata of light refraction. In the study, 213 ninth grade students participated who had taken basic Geometric Optics courses on refraction and Snell’s law.
George Fyttas, Vassilis Komis, George Kaliampos, Konstantinos Ravanis   +3 more
doaj   +1 more source

Non-traumatic bilateral corneal flap dislocation 20 years after LASIK

BMC Ophthalmology
Backgroud This report describes a case of late non-traumatic dislocation of bilateral corneal flaps, occurring 20 years after LASIK surgery. Case presentation A 52-year-old woman underwent LASIK surgery on both eyes 20 years ago.
Dakun Ren, Xiangrong Xie, Xingtong Wang, Xuming Guo   +3 more
doaj   +1 more source

Refraction of dispersive shock waves [PDF]

, 2012
We study a dispersive counterpart of the classical gas dynamics problem of the interaction of a shock wave with a counter-propagating simple rarefaction wave often referred to as the shock wave refraction.
A.M. Leszczyszyn, Ablowitz, Abramowitz, Amo, Arsenin, Assanto, Biondini, Chang, Christodoulides, Courant, El, El, El, El, El, El, El, Engels, Forest, G.A. El, Gatz, Ghofraniha, Grava, Grava, Gurevich, Gurevich, Gurevich, Gurevich, Hasimoto, Hoefer, Hoefer, Hoefer, Hoefer, Hoefer, Jin, Kamchatnov, Kamchatnov, Kamchatnov, Kivshar, Kodama, Kodama, Kudashev, Landau, Lax, Moses, Ovsyannikov, Pavlov, Pitaevskii, Rosciszewski, Rozhdestvenskii, Sasaki, Tian, Tian, Tricomi, Tsarev, V.V. Khodorovskii, Wan, Wan, Weideman, Whitham   +59 more
core   +5 more sources

Lessons Learned: Quality Analysis of Optical Coherence Tomography in Neuromyelitis Optica

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction Optical coherence tomography (OCT)‐derived retina measurements are markers for neuroaxonal visual pathway status. High‐quality OCT scans are essential for reliable measurements, but their acquisition is particularly challenging in eyes with severe visual impairment, as often observed in neuromyelitis optica spectrum disorders ...
Hadi Salih, Sara Samadzadeh, Charlotte Bereuter, Seyedamirhosein Motamedi, Claudia Chien, Pablo Villoslada, Hadas Stiebel‐Kalish, Nasrin Asgari, Yang Mao‐Draayer, Marius Ringelstein, Joachim Havla, Marco Aurélio Lana Peixoto, Ho Jin Kim, Jacqueline Palace, Maria Isabel Leite, Srilakshmi M. Sharma, Fereshteh Ashtari, Rahele Kafieh, Lekha Pandit, Orhan Aktas, Philipp Albrecht, Letizia Leocani, Itay Lotan, Sasitorn Siritho, Jérôme de Seze, Romain Marignier, Caroline Froment Tilikete, Denis Bernardi Bichuetti, Ivan Maynart Tavares, Ayse Altintas, Anu Jacob, Saif Huda, Ibis Soto de Castillo, Lawrence J. Cook, Michael R. Yeaman, Axel Petzold, Alexander U. Brandt, Friedemann Paul, Frederike C. Oertel, Hanna G. Zimmermann, with the Guthy Jackson Charitable Foundation—International Clinical Consortium and CROCTINO Collaborators   +40 more
wiley   +1 more source

Cooperative role of MDSCs and Tregs in alum-induced alloimmune tolerance in corneal transplantation

Scientific Reports
Alum, a widely used adjuvant, has recently been recognized for its capacity to modulate immune responses beyond classical activation. In this study, we investigated whether alum-induced expansion of myeloid-derived suppressor cells (MDSCs) and their ...
Lifang Li, Yuping Han, Xiangrong Xie, Dakun Ren, Ying Zhang, Shaofeng Hao, Xuming Guo   +6 more
doaj   +1 more source

Attenuation of seismic refraction waves in sedimentary layers [PDF]

Kirkuk Journal of Science, 2008
A study of attenuation of seismic refraction waves in sedimentary layers is carried out at two sites near Al-Riyadh and Baiji towns, Kirkuk Governorate in order to determine the attenuation coefficients of the two sites.
Abboud S.Ishag, Fitian R. Al-Rawi, Salman Z. Khorshid   +2 more
doaj   +1 more source

Physical and Methodological Perspectives on the Optical Properties of Biological Samples: A Review

Photonics, 2021
The optical properties of biological systems can be measured by imaging and microscopy methodologies. The use of X-rays, γ-radiation and electron microscopy provides information about the contents and functions of the systems. The need to develop imaging
George I. Lambrou, Anna Tagka, Athanasios Kotoulas, Argyro Chatziioannou, George K. Matsopoulos   +4 more
doaj   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source