Search results for " parametric"
showing 10 items of 122 documents
LaDy: Software for assessing local landscape diversity profiles of raster land cover maps using geographic windows
2003
Landscape ecology starts from the assumption that diversity and spatial arrangement of ecosystem mosaics have ecological implications and tries to understand the interactions between diversity and structure of large spatially heterogeneous areas and their ecological functions. These assumptions imply effective use of earth observation techniques and geographic information systems, enabling a global view of the landscape mosaics. In this paper, a software, LaDy (Landscape Diversity Software), for computing Re´nyi’s local landscape diversity profile on raster land cover maps is presented. LaDy is based on the use of Merchant’s adaptive geographic window, which is designed to operate on a neig…
Exploiting the optical quadratic nonlinearity of zinc-blende semiconductors for guided-wave terahertz generation: A material comparison
2010
We present a detailed analysis and comparison of dielectric waveguides made of CdTe, GaP, GaAs and InP for modal phase matched optical difference frequency generation (DFG) in the terahertz domain. From the form of the DFG equations, we derived the definition of a very general figure of merit (FOM). In turn, this FOM enabled us to compare different configurations, by taking into account linear and nonlinear susceptibility dispersion, terahertz absorption, and a rigorous evaluation of the waveguide modes properties. The most efficient waveguides found with this procedure are predicted to approach the quantum efficiency limit with input optical power in the order of kWs.
Parametric Experiments in Architecture : a Connection Joint Design for Sustainable Structures in Bamboo
2023
This book offers a comprehensive overview of the use of bamboo in the building industry. It systematically demonstrates bamboo’s utility in terms of its properties, describing the material properties of typical industrial bamboo products, and discussing their performance evaluation and optimization as building components and in the creation of building envelopes. The book presents the recent developments regarding the innovative ways to design and represent architecture through parametric survey tools, and describes the experimental geometrical-generative design process of a connection joint for free-form lightweight structures employing beams made of bamboo culms. It examines algorithmic-g…
Analisi parametrica della torsione non uniforme dei ponti in curva con sezione a parete sottile.
2013
Il mattone cuneiforme maiolicato. Procedure algoritmico-parametriche digitali come strumento di indagine e progettazione: dall'architettura storica a…
2020
The study focuses on the cuneiform in majolica brick that has been widespread in Sicily since the 16th century for the construction of spires and domes. A unifying element that has constituted a particular identity contribution to the island’s brick tradition; an original solution able to combine aesthetics with structural and durability. On the basis of more than a hundred examined cases, the different geometrical-formal peculiarities detected in relation to the characteristics of the shell are described. Some analyses and checks of the traditional geometrical composition patterns of the wall facade are reported. Through the definition of digital tools of algorithmic-parametric design, new…
Architects as tool consumers: discovering trends in software and programming languages for Architecture with Google Trends
2019
Architect professional figure and skills have undergone innumerable evolutions throughout human history, and although the architect's task is always substantially to design buildings and spaces, the use of digital tools has undoubtedly marked the greatest change in architectural design since the Renaissance, if not since the time of Vitruvius (Sacchi 2018). However, when we talk about the relationship between architecture and digital tools, we immediately think about projects of some contemporary architects and researches of some important academics come to mind. Digital tools are now everywhere within the fragmented world of architecture: from multinationals firm with offices in the major …
The evolution of the digital curve: from shipbuilding spline to the diffusion of NURBS, subdivision surface and t-splines as tools for architectural …
2020
In this article, we will follow the history of splines, digital methods that have characterized the architectural design process since the last decade of the twentieth century. We will describe their evolutions since the beginning as analogical tools for boat construction in the eighteenth century, to its passage to digital within the automotive industry. Then the relationship with the aerospace industry, and the evolution which from digital animation, have led nurbs, subdivision surfaces and t-splines to become everyday computational tools within architecture workflow. Recent developments on t-splines, following their acquisition by Autodesk, will lead us to a reflection on the relationshi…
Digital & Documentation - The new boundaries of digital &documentation - Vol. 4
2022
Methodological aspects for the use of surfaces parametric modelers in architectural design. A study case
2017
Il presente studio affronta le implicazioni metodologiche determinate nello svolgimento di un iter progettuale tramite utilizzo di un modellatore parametrico algoritmico. L’obiettivo è quello di dimostrare come la parametrizzazione degli elementi morfologici debba generare un rapporto biunivoco con le logiche progettuali, ma senza dettarne le direttive o stravolgerle. Oggetto dell’intervento progettuale è un centro polifunzionale a vocazione turistica di servizio all’area del Parco Archeologico di Agrigento, che instauri con la Valle dei Templi un rapporto contestuale di dialogo morfologico e visivo. The present study addresses the methodological implications determined in the carrying out …
Backward second-harmonic generation of near infrared picosecond pulses
2014
We report on backward second-harmonic generation using picosecond laser pulses in congruent lithium niobate with 3.2 µm periodic poling. By tuning both the pump wavelength and the sample temperature, we observed three resonant peaks in the range 1530-1730 nm, corresponding to 16th, 17th and 18th quasi-phase-matching orders, respectively. A maximum conversion efficiency of 0.475% was achieved at the 16th order with a 10 kW peak pump power. The latter is the highest conversion reported in bulk to date, for the backward configuration, with an improvement greater than 50% with respect to those previously achieved with nanosecond pulses for the same order of resonance.