Search results for " Ser"
showing 10 items of 5437 documents
Oltre l'illusionismo pittorico: i teatrini prospettici nell'architettura siciliana tra Seicento e Settecento
2015
Durante i primi trentanni del XVI secolo l'uso in Sicilia di composizioni scultoree in prospettiva subì un significativo sviluppo grazie all'opera di Antonello Gagini (1478ca-1536) che conferì un vero e proprio effetto tridimensionale alle immagini scolpite nel marmo dando luogo ai cosiddetti "teatrini prospettici". L'inizio artistico di Giacomo Serpotta (1656-1732) diede il via ad una nuova, breve ma significativa fase orientata verso nuovi effetti prospettici. During the first thirty of the 16th century the use in Sicily of perspective compositions in sculptural reliefs underwent significanti development thanks to the work of Antonello Gagini (1478ca-1536) who passed previous models and l…
Service Design and Urban Policies
2016
The urban environment has been facing multiple challenges, considering the social, political and economical forces which act within this realm. Indeed, various stakeholders have been debating over problems spread within the cites. The international community is aware about the needs to rethink the urbanisation model. Indeed, there is an high number of examples which show the necessity to bring new approaches, methods and processes in the cites’ strategies and policies. In this paper we will briefly show experimentations, methods and solutions deployed according to the different realities. The digital revolution has a role in facing these challenges, since it is possible to exploit its new m…
Ietvaru salīdzināšana tīmekļa lietotnes ģenerēšanai no datu modeļa
2018
Tīmekļa vietņu apjoms visā pasaulē arvien palielinās, tāpēc ir nepieciešams pēc dažādu sarežģītību veidu tīmekļa vietnēm. Lai ātri un ērti izveidotu tīmekļa vietni, ar vai bez noteiktām biznesa prasībām, nepieciešams ņemt vērā dažādi faktori kā tiks veidota tīmekļa vietne. Darba mērķis ir salīdzināt programmu ietvarus tīmekļa vietņu ģenerēšanai, balstoties uz iepriekš izveidotas datu bāzes. Tiks izpētīts ietvaru rīku funkcionālās iespējas un pielāgošana noteiktām vajadzībām. Svarīgs vērtēšanas kritērijs ir ietvaru piedāvātie palīgrīki izstrādes gaitas paātrināšanai. Pēc šiem kritērijiem izvēlētie ietvari tiks salīdzināti un iegūti secinājumi.
Aktīvā kataloga migrēšanas rīks
2016
Šī kvalifikācijas darba mērķis ir izstrādāt programmu “Aktīvā kataloga migrēšanas rīks”. Programmas uzdevums būs veikt uz Windows Server operētājsistēmas bāzēta servera Aktīvā kataloga lietotāju un lietotāju grupu informācijas eksportēšanu jeb dublēšanu, kā arī šīs informācijas importēšanu uz jaunizveidota servera. Programma izstrādāta programmēšanas valodā C#, balstoties uz .Net ietvaru.
Motivations, engagement and adoption of e-WOM in restaurants.
2022
Resumen El objetivo del presente trabajo fue estudiar el efecto que tienen las motivaciones para consultar y escribir e-WOM sobre el compromiso con el e-WOM y la influencia de dicho compromiso en la adopción del e-WOM consultado. Para analizar estas relaciones, se realizó una investigación empírica aplicada en el contexto de los restaurantes. El ámbito geográfico fue Ecuador, con una muestra de 461 consumidores. Se utilizó un modelo de ecuaciones estructurales y se validó la cadena de relaciones. Los resultados confirmaron las relaciones entre estas variables; además, se presentaron implicaciones académicas interesantes para profundizar en el estudio sobre el compromiso con el e-WOM, así co…
On the Coefficients of Multiple Series with Respect to Vilenkin System
2017
Abstract We give a sufficient condition for coefficients of double series Σ Σ n,m an,m χ n,m with respect to Vilenkin system to be convergent to zero when n + m → ∞. This result can be applied to the problem of recovering coefficients of a Vilenkin series from its sum.
A quartz amplifier for high-sensitivity Fourier-transform ion-cyclotron-resonance measurements with trapped ions
2019
Single-ion sensitivity is obtained in precision Penning-trap experiments devoted to light (anti)particles or ions with low mass-to-charge ratios, by adding an inductance coil to an amplifier connected to the trap, both operated at 4 K. However, single-ion sensitivity has not been reached on heavy singly or doubly charged ions. In this publication, we present a new system to reach this point, based on the use of a quartz crystal as an inductance, together with a newly developed broad-band (BB) amplifier. We detect the reduced-cyclotron frequency of 40Ca+ ions stored in a 7-tesla open-ring Penning trap. By comparing the detected electric signal obtained with the BB amplifier and the fluoresce…
Photoelectron Emission from Metal Surfaces Induced by VUV-emission of Filament Driven Hydrogen Arc Discharge Plasma
2015
Photoelectron emission measurements have been performed using a filament-driven multi-cusp arc discharge volume production H^- ion source (LIISA). It has been found that photoelectron currents obtained with Al, Cu, Mo, Ta and stainless steel (SAE 304) are on the same order of magnitude. The photoelectron currents depend linearly on the discharge power. It is shown experimentally that photoelectron emission is significant only in the short wavelength range of hydrogen spectrum due to the energy dependence of the quantum efficiency. It is estimated from the measured data that the maximum photoelectron flux from plasma chamber walls is on the order of 1 A per kW of discharge power.
Description of intermodulation generation of nonlinear responses beyond the validity of the power series expansion
2021
Weakly nonlinear responses are commonly described by a power series expansion. However, intermodulation distortion products that cannot be described by a power series have been observed in a variety of physical systems. As the power series description is only applicable within its radius of convergence, we choose an alternative approach based on Fourier coefficients to describe intermodulation levels beyond the convergence of the power series. The description over a wide power range allows us to make a decision about models and to determine previously inaccessible model parameters. We apply the approach to data obtained from the characterization of the nonlinear dielectric susceptibility of…
Analytical solution for the diffusion of a capacitor discharge generated magnetic field pulse in a conductor
2016
Powerful forces arise when a pulse of a magnetic field in the order of a few tesla diffuses into a conductor. Such pulses are used in electromagnetic forming, impact welding of dissimilar materials and grain refinement of solidifying alloys. Strong magnetic field pulses are generated by the discharge current of a capacitor bank. We consider analytically the penetration of such pulse into a conducting half-space. Besides the exact solution we obtain two simple self-similar approximate solutions for two sequential stages of the initial transient. Furthermore, a general solution is provided for the external field given as a power series of time. Each term of this solution represents a self-sim…