Results 101 to 110 of about 14,701 (247)

Treatment of moderate-to-high hyperopia with the WaveLight Allegretto 400 and EX500 excimer laser systems

open access: yesClinical Ophthalmology, 2017
Manoj Motwani,1 Ronald Pei1,21Motwani LASIK Institute, San Diego, 2Precision Outcome Consultants, Fresno, CA, USAPurpose: To evaluate the efficacy of treating patients with +3.00 diopters (D) to +6.00 D of hyperopia via laser-assisted in situ ...
Motwani M, Pei R
doaj  

Microwave pumped excimer lasers

open access: yesConference on Lasers and Electro-Optics, 1981
Microwave excitation is a simple practical method of pumping high-pressure rare-gas-halide laser systems which avoids the discharge instabilities of typical avalanche discharges. Thus long pulse high-repetition rate operation is possible. In addition, the device can be easily constructed with high-vacuum halogen compatible materials and is free from ...
A. Mendelsohn   +3 more
openaire   +2 more sources

First 20 Years of Orbitrap Mass Spectrometry as the Mainstream Analytical Technique

open access: yesMass Spectrometry Reviews, EarlyView.
ABSTRACT This review traces the first 20 years of Orbitrap mass spectrometry as a mainstream high‑resolution and accurate‑mass (HR/AM) technology. It outlines the historical development of the Orbitrap analyzer, the evolution of major instrument families, and the key technological innovations that enabled its widespread adoption. Particular emphasis is
Alexander Makarov
wiley   +1 more source

A PLP‐SEC Investigation of Di(Ethylene Glycol) Methyl Ether Methacrylate Radical Polymerization Propagation Kinetics in Solution

open access: yesMacromolecular Reaction Engineering, EarlyView.
The propagation rate coefficient of di(ethylene glycol) methyl ether methacrylate exhibits the same temperature dependency but is a factor of 12 higher in aqueous solution compared to bulk. Smaller increases are observed in ethanol and ethanol/water mixtures, with the value of the rate coefficient decreasing as the monomer concentration in solution is ...
Fatemeh Salarhosseini   +1 more
wiley   +1 more source

Vacancy‐Induced Z‐Contrast Anomaly in Self‐Assembled (Ti,V)O2 Heterostructure

open access: yesSmall, EarlyView.
This study investigates the unexpectedly high contrast observed in ADF‐STEM imaging of spinodal decomposed (Ti,V)O2 heterostructure. In situ heating, GPA, and EELS analyses reveal that oxygen vacancies accumulate in V‐rich layers due to facilitated vacancy migration along [001]R pathways during phase separation by spontaneous ionic diffusion.
Hyeji Sim   +6 more
wiley   +1 more source

Giant Bulk Photovoltaic Effect in Crystal Orientation Restructured Quasi‐Epitaxial BaTiO3 Films on Silicon Substrates

open access: yesSmall, EarlyView.
ABSTRACT The bulk photovoltaic (BPV) effect in ferroelectric (FE) materials enables the direct conversion and exchange of information between the optical and electrical domains in applications such as photonic computing and photodetection. Although the above‐bandgap open‐circuit voltage in the FE BPV effect permits a much higher photovoltage in ...
Wenzhong Ji   +11 more
wiley   +1 more source

Combinatorial Synthesis of BaCu2Se2 Thin Films: Effect of Composition on Crystal Structure and Optoelectronic Properties

open access: yesSmall, EarlyView.
The emerging BaCu2Se2 semiconductor compound is synthesized in combinatorial thin film libraries for fast screening of its fundamental properties related to the application in sustainable energy sources. Ba‐rich and Cu‐rich compositions are explored.
Marin Rusu   +16 more
wiley   +1 more source

Non-Liouvillean ion injection via resonantly enhanced two-photon ionization

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2004
The charge-exchange method is now one of the main techniques for ion injection into accelerators and storage rings. The disadvantages of conventional methods, based on the atom or ion stripping in a material target, are emittance growth, energy ...
B. A. Knyazev
doaj   +1 more source

Quantum State‐Resolved Photodissociation Dynamics Study of Transition‐Metal Carbonyl and Nitrosyl

open access: yesThe Chemical Record, EarlyView.
State‐resolved scattering measurements provide experimental visualization of nuclear motions in reacting molecules. Carbonyls and nitrosyls are typical ligands in most of the transition‐metal complexes, which undergo dissociation upon visible and ultraviolet photoexcitation.
Keigo Nagamori   +2 more
wiley   +1 more source

Comparison of electrically driven lasers for space power transmission [PDF]

open access: yes
High-power lasers in space could provide power for a variety of future missions such as spacecraft electric power requirements and laser propulsion. This study investigates four electrically pumped laser systems, all scaled to 1-MW laser output, that ...
Conway, E. J.   +4 more
core   +1 more source

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