Search results for "wells"

MR3063436 Reviewed Znojil, Miloslav; Wu, Junde A generalized family of discrete PT-symmetric square wells. Internat. J. Theoret. Phys. 52 (2013), no.…

2014

Consequences of the spatial localization on the exciton recombination dynamics in InGaP/GaAs heterostructures

2002

5 páginas, 4 figuras.

Study of the photocatalytic activity of Keggin and Wells Dawson heteropolyacids: role of the acidity and of the pseudo-liquid phase regime

2017

Study of the photocatalytic activity of Keggin and Wells Dawson heteropolyacids: role of the acidity and of the pseudo-liquid phase regime

Blue lasing at room temperature in high quality factor GaN/AlInN microdisks with InGaN quantum wells

2007

The authors report on the achievement of optically pumped III-V nitride blue microdisk lasers operating at room temperature. Controlled wet chemical etching of an AlInN interlayer lattice matched to GaN allows forming inverted cone pedestals. Whispering gallery modes are observed in the photoluminescence spectra of InGaN/GaN quantum wells embedded in the GaN microdisks. Typical quality factors of several thousands are found (Q>4000). Laser action at similar to 420 nm is achieved under pulsed excitation at room temperature for a peak power density of 400 kW/cm(2). The lasing emission linewidth is down to 0.033 nm.

Wells futurologo

2021

Una lettura critica del saggio di H.G Wells "La scoperta del futuro" con cui l'autore di letteratura di fantascienza definisce i caratteri di una nuova disciplina che alcuni decenni più tardi si sarebbe chiamata Futurologia. A critical reading of the essay by H.G Wells "The discovery of the future" with which the author of science fiction literature defines the characteristics of a new discipline that a few decades later would be called Futurology.

Event-Triggered Nonlinear Control of OWC Ocean Wave Energy Plant

2018

This paper presents event-triggered nonlinear controllers for oscillating water column (OWC) ocean wave energy plant. The study is based on event-triggered backstepping controller (ET-BSC) and event-triggered sliding mode controller (ET-SMC) to control the rotational speed of an OWC turbine coupled to a generator. The designed controllers are capable to avoid the stalling of the Wells turbine so as to maximize its output power. The aim of event-triggered control is to minimize the control updates, thus providing efficient utilization of resources without compromising the OWC performance. In this regard, aperiodic sampling has been applied using an event-triggering rule derived from Lyapunov…

Benedict Wells: Yksinäisyyden jälkeen

2021

Kirja-arvostelu teoksesta Benedict Wells: Yksinäisyyden jälkeen (Vom Ende der Einsamkeit). Suom. Raimo Salminen. Aula & Co 2021. 320 s. nonPeerReviewed

Nasium : les fouilles du "Cul de Breuil" à Saint-Amand-sur-Ornain (Meuse) : Fouille triennale 2012-2014. Rapport intermédiaire 2012

2011

This report presents the results of a second series of excavations carried out between the oppidum of Boviolles and the ancient city of Nasium. It affects an occupation dated between La Tène D2 and the beginning of the augustean period, characterized by a causeway linking the two entities, a level delivering traces of artisanal activities, wells and a cooking kiln. This occupation is also characterized by the presence of the Roman army embodied in many militaria. This presence is central to the issue of the development of the ancient settlement of Nasium.

Indium surfactant effect on AlN/GaN heterostructures grown by metal-organic vapor-phase epitaxy: Applications to intersubband transitions

2006

We report on a dramatic improvement of the optical and structural properties of AlN/GaN multiple quantum wells (MQWs) grown by metal-organic vapor-phase epitaxy using indium as a surfactant. This improvement is observed using photoluminescence as well as x-ray diffraction. Atomic force microscopy shows different surface morphologies between samples grown with and without In. This is ascribed to a modified relaxation mechanism induced by different surface kinetics. These improved MQWs exhibit intersubband absorption at short wavelength (2 mu m). The absorption linewidth is as low as 65 meV and the absorption coefficient is increased by 85%.

Intense laser effects on donor impurity in a cylindrical single and vertically coupled quantum dots under combined effects of hydrostatic pressure an…

2010

WOS: 000280235800010