Results 61 to 70 of about 47,639 (261)

Advances in Design-Based Research

Frontline Learning Research, 2014
Design-based research is a core methodology of the Learning Sciences. Historically rooted as a movement away from the methods of experimental psychology, it is a means to develop “humble” theory that takes into account numerous contextual effects for ...
Vanessa Svihla
doaj   +1 more source

High-Q distributed-Bragg-grating laser cavities [PDF]

, 2011
Applying Bragg gratings in Al2O3 channel waveguides, we demonstrate distributed Bragg reflectors with Q-factors of 1.02x10e6. An integrated Al2O3:Yb3+ waveguide laser with 67% slope efficiency and 47 mW output power is achieved with such ...
Bernhardi, E.H., Pollnau, M., Ridder, R.M. de, Wolferen, H.A.G.M. van, Wörhoff, K.   +4 more
core   +2 more sources

Dynamic properties of silicon-integrated short-wavelength hybrid-cavity VCSEL [PDF]

, 2016
We present a vertical-cavity surface-emitting laser (VCSEL) where a GaAs-based "half-VCSEL" is attached to a dielectric distributed Bragg reflector on silicon using ultra-thin divinylsiloxane-bis-benzocyclobutene (DVS-BCB) adhesive bonding, creating a ...
Baets, Roel, Gustavsson, JS, Haglund, EP, Kumari, Sulakshna, Larsson, A, Roelkens, Günther, Westbergh, P   +6 more
core   +1 more source

A Broad Continuous Temperature Tunable DBR Single-Frequency Fiber Laser at 1064 nm

IEEE Photonics Journal, 2016
Based on a temperature-dependent longitudinal-mode-selection model, a broad temperature range for single-longitudinal-mode (SLM) operation of a short DBR phosphate fiber laser has been demonstrated.
Yuning Zhang, Can Li, Shanhui Xu, Huaqiu Deng, Zhouming Feng, C. Yang, Xiang Huang, Yuanfei Zhang, J. Gan, Zhongmin Yang   +9 more
semanticscholar   +1 more source

High‐Transmission Mid‐Infrared Bandpass Filters using Hybrid Metal‐Dielectric Metasurfaces for CO2 Sensing

Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.
This article presents a hybrid metal‐dielectric metasurface in transmission mode for mid‐infrared (MIR) spectroscopy. Composed of germanium on aluminium cylinders atop a calcium fluoride substrate, the metasurface achieves 80% transmission efficiency at λ = 2.6 µm with a narrow full‐width‐half‐maximum of 0.4 µm.
Amr Soliman, C Williams, Richard Hopper, Florin Udrea, Haider Butt, Timothy D. Wilkinson   +5 more
wiley   +1 more source

Anti-Doping Monitoring Web-Based Android for Athletes Disabilities

Journal of Coaching and Sports Science
The usage of doping has been banned in the world of sports. This ban is regulated by law and must be adhered to by all athletes. This research aimed to identify the need for efforts to prevent doping use and develop a monitoring tool for doping ...
Fadilah Umar, Dina Listiani, Slamet Riyadi, Misbah Misbah   +3 more
doaj   +1 more source

High-absorbance resonant-cavity-enhanced free-standing Ge photodetector for infrared detection at 1550 nm wavelength

AIP Advances, 2023
A novel free-standing resonant-cavity-enhanced (RCE) Ge thin-film absorber is designed with a bottom distributed Bragg reflector (DBR) for infrared photodetection at 1550 nm wavelength based on a Si substrate.
Ching-Yu Hsu, Zingway Pei, Jia-Ming Liu
doaj   +1 more source

Experimental flow boiling study in a 0.52 mm diameter vertical tube using R134a [PDF]

, 2008
This article is also available online from the link below.Experimental results for R134a boiling on a vertical stainless steel tube of internal diameter 0.52 mm are presented in this paper.
Karayiannis, TG, Kenning, DBR, Mahmoud, MM, Shiferaw, J   +3 more
core  

Distributed Bragg Reflector Based on Plasmonic Ag: Plasma Polymer Nanocomposites

Advanced Optical Materials, EarlyView.
This paper presents a comprehensive approach for the optical design and validation of silver nanocomposite‐based Distributed Bragg Reflectors (DBRs). It describes deriving material properties (n, k) and using them to predict the performance of the deposited optical stack, as well as to characterize imperfections in the DBR deposition, or even to ...
Zdeněk Krtouš, Pavel Pleskunov, Tereza Košutová, Milan Dopita, Ondřej Kylián, Bill Baloukas, Ludvík Martinu, Jaroslav Kousal   +7 more
wiley   +1 more source

California's Proposition 8: What Happened, and What Does the Future Hold? [PDF]

, 2009
Analyzes the characteristics of voters most likely to have supported or opposed Proposition 8 in 2008, including party affiliation, religiosity, and age.
Kenneth Sherrill, Patrick J. Egan
core