Search results for "FOT"
showing 10 items of 1161 documents
Un’esperienza di rilevamento architettonico con tecniche integrate
2004
Lo studio esposto riguarda la sperimentazione sulle tecniche per il rilevamento e la rappresentazione di manufatti architettonici caratterizzati dalla presenza di una ricca decorazione scultorea. In particolare, è stata condotta una applicazione sulla parete di ingresso dell’Oratorio del SS. Rosario presso la chiesa di Santa Cita, nel centro storico di Palermo. Nel corso dello studio sono stati messi a confronto ed integrati i dati provenienti dal rilevamento diretto, topografico, fotogrammetrico, e da acquisizioni eseguite con laser a scansione. This paper is addressed to test suitable techniques for surveying and restitution of architectural surfaces decorated with free-form masses (i.e. …
Un'autoetnografia per immagini
2020
Lo studio propone una riflessione geografica sulla fotografia (sui suoi usi e sui suoi sviluppi) in relazione a varie forme di spazialità. Attraverso l'analisi di alcune immagini sul Social Network Instagram viene presentata un'etnografia di tipo riflessivo utile a definire e discutere alcuni aspetti espistemologici della disciplina geografica, quali la metodologia da utilizzare, il posizionamento del ricercatore sul campo e i suoi oggetti di conoscenza e d'indagine scientifica. The study proposes a geographical reflection on photography (on its uses and its developments) in relation to various forms of spatiality. Through the analysis of some images on the Instagram Social Network, a refle…
Il fotografo bracconiere
2021
L’opera di Maurizio Galimberti ci ha abituato a vedere nella fotografia del Novecento, e anche in quella dei primi decenni del nuovo secolo, un repertorio inesauribile di mosse teoriche che egli – senza intellettualismi – ha saputo ripensare attraverso la sua peculiare prassi artistica. Maurizio Galimberti's work has accustomed us to seeing in the photography of the twentieth century, and also in that of the first decades of the new century, an inexhaustible repertoire of theoretical moves that he - without intellectualism - was able to rethink through his peculiar artistic practice.
Nonluoghi
2019
the Non-Places photographed by Michele Di Donato during his travels in different cities of the world. Metropolis that the author decides specifically for depersonalize to ensure that the shots fully reveal the anthropological and iconological suggestion that there is distinguishes
Radiative and non-radiative losses by voltage-dependent in-situ photoluminescence in perovskite solar cell current-voltage curves
2020
Abstract The rapid development of perovskite solar cells has been based on improvements in materials and device architectures, yet further progress towards their theoretical limit will require a detailed study of the main physical processes determining the photovoltaic performance. Luminescence can be a key parameter for this purpose, as it directly assesses radiative recombination. We present steady-state absolute photoluminescence of an operating device at varying voltages as a tool to study the loss mechanisms in perovskite devices. The calibration to absolute photon numbers gives access to the variation of the relative radiative/non-radiative recombination weighted along the measured po…
Tunable luminescent lead bromide complexes
2020
Lead halides are used extensively to prepare perovskite-based devices but it is less known that lead halides can also form luminescent complexes in solvents. Using polyethylene glycol as a solvent, a lead bromide complex with a photoluminescence quantum yield over 20% is obtained and the photoluminescence peak can be shifted around 50 nm with different alkylammonium bromides.
Pirmie Latvijas gaismas klimata pētījumi.
1935
Atsevišķs novilkums no Ģeogrāfiskiem rakstiem, V.
Accelerated stabilization of coherent photon states
2018
| openaire: EC/H2020/681311/EU//QUESS Control and utilization of coherent states of microwave photons is a ubiquitous requirement for the present and near-future implementations of solid-state quantum computers. The rate at which the photon state responds to external driving is limited by the relaxation rate of the storage resonator, which poses a trade-off between fast control and long storage time. Here, we present a control scheme that is designed to drive an unknown photon state to a desired coherent state much faster than the resonator decay rate. Our method utilizes a tunable environment which acts on an ancillary qubit coupled to the resonator. By periodically resetting the qubit and…
Upper limit on the cosmic-ray photon flux above 1019 eV using the surface detector of the Pierre Auger Observatory
2008
A method is developed to search for air showers initiated by photons using data recorded by the surface detector of the Auger Observatory. The approach is based on observables sensitive to the longitudinal shower development, the signal risetime and the curvature of the shower front. Applying this method to the data, upper limits on the flux of photons of 3.8 x 10-3, 2.5 x 10-3; and 2.2 x 10-3 km-2 sr-1 yr-1 above 1019 eV, 2 x 1019 eV; and 4 x 1019 eV are derived, with corresponding limits on the fraction of photons being 2.0%, 5.1%, and 31% (all limits at 95% c.l.). These photon limits disfavor certain exotic models of sources of cosmic rays. The results also show that the approach adopted…
Spinovo rozlisena time-of-flight k-reozlisena fotoemissia Ir-- Kompletny fotoemissny experiment.
2017
Ultramicroscopy 183, 19 - 29 (2017). doi:10.1016/j.ultramic.2017.06.025