Results 101 to 110 of about 330,519 (320)

The perspective of optometry students of the Phelophepa train regarding its role in developing experiential skills

African Vision and Eye Health, 2009
Purpose: The optometry degree programme in South Africa currently includes a combination of both theoretical and clinical modules.  The optometric skills required by graduates are often achieved by students’ involvement in clinical training at both in ...
R. Hansraj
doaj   +1 more source

Trapping of Bose-Einstein condensates in a three-dimensional dark focus generated by conical refraction

, 2017
We present a novel type of three-dimensional dark focus optical trapping potential for ultra-cold atoms and Bose-Einstein condensates. This 'optical bottle' is created with blue-detuned laser light exploiting the phenomenon of conical refraction ...
Ahufinger, V., Birkl, G., Küber, J., Lind, L., Mompart, J., Pfeiffer, D., Schmaltz, F., Turpin, A.   +7 more
core   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Refractive surgery. [PDF]

BMJ, 1987
  +10 more sources

A new optical method for control in visible light of volatile hydrocarbon media and their mixtures using data from light-shadow boundary images

Компьютерная оптика
We substantiate a need for developing an optical method for the rapid analysis of mixtures of volatile hydrocarbon media. Problems that arise during the express-evaluation of the state of mixtures composed of volatile hydrocarbon media using refraction ...
V.V. Davydov , D.V. Vakorina, G.V. Stepanenkov   +2 more
doaj   +1 more source

Super Gelatin [PDF]

Introduction: Can gelatin (like Jell-O) change the speed of light? Students investigate the refraction properties of gelatin to calculate its index of refraction and discover that as the light travels through the gelatin, its speed and wavelength also ...
McDonald Observatory, University of Texas at Austin   +1 more
core  

Integration of Seismic Refraction Tomography (SRT) and Electrical Resistivity Tomography (ERT) to Investigate the Effects of Landslide in Itu L. G. A., Akwa Ibom State, Southern Nigeria [PDF]

, 2020
Ibuot Johnson C., Aka Mfoniso U., Okechukwu Ebuka Agbasi   +2 more
openalex   +1 more source

Double Helical Plasmonic Antennas

Advanced Functional Materials, EarlyView.
Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin, Luka Zurak, Krzysztof Maćkosz, Lorenz Löffler, Victor Deinhart, Ivo Utke, Thorsten Feichtner, Katja Höflich   +7 more
wiley   +1 more source

Entering the Strong Coupling Regime in Conventional Organic Solar Cells

Advanced Functional Materials, EarlyView.
Organic solar cells convert light into fossil‐free energy, yet they still cannot compete with their silicon counterparts. Strong exciton‐photon coupling can ameliorate some properties of organic solar cells, but it requires additional mirrors that diminish light absorbance. Here, mirror‐free strong exciton‐photon coupling is implemented in conventional
Nicola Peruffo, Runwan Chen, Dongyan Li, Qinghe Wu, Karl Börjesson   +4 more
wiley   +1 more source