Search results for " digital CA"
showing 5 items of 5 documents
Dalla participatory culture all’utente riproduttivo. Partecipazione, informazione e valore nei processi di produzione capitalistica del Web (Prima pa…
2015
Il presente contributo costituisce la prima parte di un articolo più esteso che verrà pubblicato integralmente nei prossimi numeri di “EmergingSeries Journal”. In questa prima sezione, a partire da una breve panoramica sulle principali direzioni che orientano i cambiamenti dei grandi player del Web, si tenterà di avviare una riflessione sul ruolo dell‟utente partecipativo all‟interno dei processi di produzione capitalistica che animano le piattaforme online. In questa sede, ripercorrendo i tratti essenziali del consumo partecipativo così come definiti nell‟ambito della participatory culture, se ne metteranno in evidenza alcuni tratti problematici e si sosterrà che l‟analisi del rapporto tra…
Posting for Consensus, Sharing Consensus. The Case of Migrants on Facebook, Ideological Views and Echo Chambers
2018
This study analyses posts and comments on a popular social network (Facebook) in order to investigate how web-users take advantage of participative platforms to post ideologically-driven comments, and how the exchanges create echo chambers. In particular, the study addresses populism expressed in online debates concerning migrants and used as a pretext to show group identities and ideologies. Facebook is thus taken as an example and considered a participatory platform (Boyd 2014) of political (populist) activism and the milieu for consensus-finding. The dialogic structure of comments is studied within Conversation Analysis adapted to online written texts (Antaki et al. 2005; Giles et al. 20…
Protocolo técnico para la fotografía de fuentes filológicas primarias
2014
con fines documentales, proyectado para garantizar la máxima fidelidad posible al motivo original representado. Tras una descripción detallada del material necesario, seleccionado específicamente en función de las necesidades particulares de la fotografía de textos manuscritos o impresos, se desarrolla un procedimiento adaptado a las nuevas circunstancias de la fotografía digital, concebido en dos fases: la captación de la imagen en formato RAW, y su posterior edición. En este estudio se trata la primera parte, describiendo sistemáticamente, paso a paso, las decisiones técnicas relativas a los ajustes fotográficos de la toma en diferentes situaciones lumínicas, encaminadas a maximizar la ca…
Camera-based measurement of relative image contrast in projection displays
2013
International audience; This research investigated the measured contrast of projection displays based on pictures taken by un-calibrated digital cameras under typical viewing conditions. A high-end radiometer was employed as a reference to the physical response of projection luminance. Checkerboard, gray scale and color complex test images with a range of the projector's brightness and contrast settings were projected. Two local and two global contrast metrics were evaluated on the acquired pictures. We used contrast surface plots and Pearson correlation to investigate the measured contrast versus the projector's brightness and contrast settings. The results suggested, as expected, the proj…
EXPERIMENTAL INVESTIGATION OF DILUTE SOLID-LIQUID SUSPENSION IN AN UNBAFFLED STIRRED VESSELS BY A NOVEL PULSED LASER BASED IMAGE ANALYSIS TECHNIQUE
2009
The availability of experimental information on solid distribution inside stirred tanks is a topic of great importance in several industrial applications. The measurement of solid particle distribution in turbulent multiphase flow is not simple and the development of suitable measurement techniques is still in progress. In this work a novel non-intrusive technique for measuring particle concentration fields in solid-liquid systems is employed. The technique makes use of a laser sheet, a high sensitivity digital camera for image acquisition and a Matlab procedure for post-processing the acquired images. Experimental data are here obtained for the case of an unbaffled stirred tank. Stable tor…