Search results for "construct"

Scanning from heating: 3D shape estimation of transparent objects from local surface heating.

2009

Today, with quality becoming increasingly important, each product requires three-dimensional in-line quality control. On the other hand, the 3D reconstruction of transparent objects is a very difficult problem in computer vision due to transparency and specularity of the surface. This paper proposes a new method, called Scanning From Heating (SFH), to determine the surface shape of transparent objects using laser surface heating and thermal imaging. Furthermore, the application to transparent glass is discussed and results on different surface shapes are presented.

Boolean operations with implicit and parametric representation of primitives using R-functions

2005

We present a new and efficient algorithm to accurately polygonize an implicit surface generated by multiple Boolean operations with globally deformed primitives. Our algorithm is special in the sense that it can be applied to objects with both an implicit and a parametric representation, such as superquadrics, supershapes, and Dupin cyclides. The input is a constructive solid geometry tree (CSG tree) that contains the Boolean operations, the parameters of the primitives, and the global deformations. At each node of the CSG tree, the implicit formulations of the subtrees are used to quickly determine the parts to be transmitted to the parent node, while the primitives' parametric definition …

A modified surgical approach for hard and soft tissue reconstruction of severe periimplantitis defects – Laser‐assisted periimplant defect regenerati…

2019

Dural splitting reconstruction in retethering after lipomeningocele repair: Technical note

2021

Background: Tethered spinal cord syndrome (TCS) can occur after the surgical repair of lipomeningoceles (LMCs). In these cases, the tethering results from postoperative adhesions between the spinal cord and the overlying repaired dura. A watertight dural closure using the residual dura and/or the surrounding tissues does not always provide enough space for the spinal cord and risks retethering. Here, we report a 16-year-old patient with secondary TCS following lipomeningocele repair who successfully underwent release of the tethered filum terminale utilizing a novel dural splitting reconstructive technique to attain a water-tight closure without the need for a duroplasty. Methods: A 16-yea…

Results of isolated posterolateral corner reconstruction

2010

Abstract Background Isolated posterolateral corner (PLC) tears are relatively rare events. Various surgical techniques to treat posterolateral knee instability have been described; because surgical results are linked to cruciate reconstructions it has been difficult to date to define whether one surgical procedure has better prognosis than another. The goal of this study is to determine the clinical outcome of PLC reconstruction following fibular-based technique. Materials and methods We retrospectively evaluated a case series of patients who received isolated PLC reconstruction between March 2005 and January 2007. Ten patients were surgically treated for isolated injuries and were availabl…

La cornice Ionica del tempio G di Selinunte. Rilievo e interpretazione per la ricostruzione virtuale.

2013

This research is focused on the virtual reconstruction of the Ionic cornice of temple G of Selinunte, as a case study for the definition of a virtual reconstruction method of collapsed walls elements in archaeological contexts. The complexity of the ruins of the temple suggested a thorough archaeological analysis of the fragments of the Ionic cornice that made it possible to identify traces of the construction process left by stonecutters during the worksite such as unfinished surfaces. The study of these surfaces, together with the dimensional data surveyed, provided the information to reposition the fragments in their supposed original position, and thus develop a virtual reconstruction o…

Sustainability in executive remuneration : A missing link towards more sustainable firms?

2021

This paper contributes by showing simultaneously the interlinked challenges of sustainability-based (based on long-term economic, social and environmental targets) executive remuneration and the problems of transparency in remuneration reporting. Our empirical data, analyzed using qualitative content analysis, consists of the published remuneration statements and sustainability reports of 43 Finnish companies reporting according to the Global Reporting Initiative (GRI) framework. Our results indicate that comprehensive sustainability remuneration is still rare in Finnish large companies: long-term financial targets are implemented at most companies, but social or environmental targets were …

The Press as a Resource for Promoting Sustainability Competencies in Teacher Training: The Case of SDG 7

2022

Given the seriousness of the socio-environmental situation we are facing, this study aims to contribute to the involvement of teachers in education for sustainability through the use of non-formal education, particularly the press. The main objectives of the present study are to analyse the use of the press in science education, as well as the design, implementation and evaluation of tools aimed at teachers and trainee researchers in order to encourage and promote attention to the Sustainable Development Goals (SDGs) and more specifically SDG 7 (clean and affordable energy for all) in science education. The proposals are carried out using a constructivist methodology in sessions structured …

Hemp: past, present, future for a Sustainable Architecture

2020

Cannabis, so classified by the botanist Linnaeus in 1753, is a plant with a long and tormented history. It has been a source of subsistence for many peoples who, since the dawn of time, have exploited its enormous and almost infinite potential. Hemp has survived eighty years of prohibition and the fierce attacks of the chemical, pharmaceutical, textile and other industries, which over the years have monopolized the world economy, contributing significantly to the process of ecosystem degeneration of the planet. Today, in the light of the compelling and urgent intervention actions, aimed at contrasting environmental emergencies, hemp returns to peep globally to help create a sustainable mode…

SUSTAINABLE ARCHITECTURE: THE ECO-EFFICIENCY EARTH CONSTRUCTION

2017

The appropriate choice of building materials can contribute decisively to reduce the energy consumption of the building sector. The increasing worries for the environmental impact of construction materials is witnessed by a lot of studies The mentioned worries has brought again the attention towards natural materials. The use of more sustainable construction materials and construction techniques represent a major contribution to the eco-efficiency of the construction industry and thus to a more sustainable development. Within this frame the renewed interest for a natural material such as the rammed earth is included; the interest has been in continuous growth from the 80s till today. The ra…