Hotel Architecture in Portugal

Abstract

The demand for unprecedented performance in the upcoming 6G wireless networks is fomenting the research on THz communications empowered by Reconfigurable Inteligent Surfaces (RISs). A wide range of use cases have been proposed, most of them, assuming high-level RIS models that overlook some of the hardware impairments that this technology faces. The expectation is that the emergent reconfigurable THz technologies will eventually overcome its current limitations. This disassociation from the hardware may mask nonphysical assumptions, perceived as hardware limitations. In this paper, a top-down approach bounded by physical constraints is presented, distilling from system-level specifications, hardware requirements, and upper bounds for the RIS-aided system performance. We consider D-band indoor and outdoor scenarios where a more realistic assessment of the state-of-the-art solution can be made. The goal is to highlight the intricacies of the design procedure based on sound assumptions for the RIS performance. For a given signal range and angular coverage, we quantify the required RIS size, number of switching elements, and maximum achievable bandwidth and capacity.

Structural, Magnetic, and Electrical Characterization of New Polycrystalline Phases of Nickel- and Platinum-Doped [(DT-TTF)n][Au(mnt)2] (n = 1, 2)

“…The electrical conductivity behavior of the semiconducting Pt-doped ladder ( 1 Au(Pt) ) structure (σ RT = 13 S/cm) is similar to that reported for the pure gold spin-ladder and indeed parallels that of the copper spin-ladder, with a sharp transition at 223 K. These results are therefore the evidence of the first synthesis of a magnetically doped spin-ladder compound. However, they contrast with the (perylene) 2 [Au 1 - x Pt x (mnt) 2 ] system, where solid solutions could be obtained in the more extended range 0 < x ≤ 0.40 and x ≥ 0.98. , The main structural details and physical properties of all compounds are summarized in Table .…”

Study of Natural Ventilation Strategies in the São Cristóvão Church in Lisbon Using a Multizone Airflow Model

“…The church of São Cristóvão has been the focus of other studies [1,[25][26][27][28][29][30][31][32][33][34][35][36]. In 2012, Silva [37] described the evolution of the interior climate of the São Cristóvão church, studying the stratification of temperatures and the thermal lag with respect to the external temperatures, in order to estimate the probability of surface condensation.…”

Construction and Maintenance Planning Supported on Virtual Environments

“…A first prototype for the lighting system had already been completed (Sampaio et al, 2009). A second prototype concerning construction planning is now complete (Santos, 2010) and two Virtual Reality (VR) models concerning maintenance of the closure of interior (Rosário, 2011) and exterior (Gomes, 2010) walls are also finished. This chapter describes these three later models created as part of the overall research project.…”