1,004 research outputs found
Innovative technologies for restoration in Pompeii. The 3D morphometric survey in via dellâAbbondanza
The project had as primary objectives the safeguarding of architectural remains and the experimentation with restoration methodologies and materials. The restoration works addressed a number of facades along the stretch of the Decumanus Maximus known today as via dell'Abbondanza. After the collection of numerous notes from previous archaeological investigations and from visual inspections about architectural morphology, materials and state of conservation, surveys of ancient facades were carried out and measurement data were collected. The survey by means of 3D laser scanner of the varied and complex architectures have been characterized by an attempt to focus efforts on contributing representational knowledge of the existing site elements
Monitoring and conservation of archaeological wooden elements from ship wrecks using 3D digital imaging
In marine archaeology, many artifacts made of
metallic or organic material are found in different state of
conservation depending of the environment in which they are
discovered. Once brought to the surface for study or display
purposes, the artifacts need to be treated properly otherwise they
deteriorate in a short lapse of time. The fragility of organic
artifacts and the volumetric variation caused by the marine life
on or surrounding them and water lead to the need for
measuring the physical dimensions soon after an artifact is
extracted from the sea. In an ideal context, it would be
appropriate to preserve and restore the archaeological elements
rapidly and with the latest methods but due to the large number
of artifacts, the cost of complete restoration activities becomes
prohibitive for the funding available in public institutions. For
this reason, many public laboratories are resorting to digital
technologies for documentation, restoration, display and
conservation. In this paper, we illustrate the experience of the
University of Salento in this area of archaeology using 3D
imaging technology. The interest sprang from the need to develop
a protocol for documentation and digital restoration of
archaeological finds discovered along the coast of Torre S. Sabina (BR) Italy
Robust surface segmentation and edge feature lines extraction from fractured fragments of relics
AbstractSurface segmentation and edge feature lines extraction from fractured fragments of relics are essential steps for computer assisted restoration of fragmented relics. As these fragments were heavily eroded, it is a challenging work to segment surface and extract edge feature lines. This paper presents a novel method to segment surface and extract edge feature lines from triangular meshes of irregular fractured fragments. Firstly, a rough surface segmentation is accomplished by using a clustering algorithm based on the vertex normal vector. Secondly, in order to differentiate between original and fracture faces, a novel integral invariant is introduced to compute the surface roughness. Thirdly, an accurate surface segmentation is implemented by merging faces based on face normal vector and roughness. Finally, edge feature lines are extracted based on the surface segmentation. Some experiments are made and analyzed, and the results show that our method can achieve surface segmentation and edge extraction effectively
Status of the Standard Model at the LHC Start
I present a concise review of where we stand in particle physics today.
First, I will discuss QCD, then the electroweak sector and finally the
motivations and the avenues for new physics beyond the Standard Model.Comment: Plenary Talk at the 5th Italian Workshop on p-p Physics at the LHC.
13 pages, no figure
Role of Computer Technology in Changing Smile
In the ever changing complex society, where success has become a mantra for both young and old, facial appearance that includes smile, plays a pivotal role. Among many attractive components in a personâs face, smile reflects the persona of an individual. In the present day next gen age, science in unison with technology and techniques which are rapidly getting ingrained into day to day dental practice, has changed the perception of healthy smile by more effective and less invasive approach. In this scenario, the onus lies on the dentist to give that perfectionist touch to a customised smile using computer aided software and hardware apparatus, and to avail the best state of the art material, equipment and techniques. Hence, it is imperative for us to understand and inculcate the role of modern cutting edge computer-aided technologies used in designing and changing the smile of an individual
The Interdisciplinary Research of Virtual Recovery and Simulation of Heritage Buildings. Take Lingzhao Xuan in the Palace Museum as an Example
Due to natural disasters, economic development, tourism development and other factors, many precious heritage buildings have been in endangered situation. How to protect, research and develop these heritage resources effectively has become very urgent and important. Three-dimensional (3D) digital technology plays a more and more important role in protecting and using cultural heritage. The article will take the synthetic study on the mode of virtual construction, recovery, simulation and exhibition of Lingzhao Xuan (a heritage building which stopped construction for some reason in the Palace Museum) as an example to explore and summary an effective interdisciplinary cooperation mode. Besides, we broaden and deepen the concept of âvirtual recoveryâ, and add the concept âvirtual simulationâ by means of virtual design and the new achievements which are created by such mode for the first time. This research is aimed to provide reference for the standard application of 3D digital technology and perfect the protection work of heritage buildings
Digital sculpting for historical representation: Neville tomb case study
Despite digital 3-D polygon modelling applications providing a common and powerful tool-set for archaeological, architectural and historical visualisation over recent years, the relatively recent developments in high-resolution sculpting software allow for the possibility to create digital outcomes with a degree of surface fidelity not previously obtainable from the more widely used poly-modelling software packages. Such digital sculpting applications are more commonly applied within the video games and TV/motion picture industries, the intention of this paper is to show how such tools and methodologies together with existing scanned data and some historical knowledge can remediate and re-imagine lost sculptural form. The intended research will focus on an examination and partial re-construction of the tomb of Sir John Neville, 3rd Baron Raby located at Durham Cathedral, County Durham UK
Tevatron-for-LHC Report: Preparations for Discoveries
This is the "TeV4LHC" report of the "Physics Landscapes" Working Group,
focused on facilitating the start-up of physics explorations at the LHC by
using the experience gained at the Tevatron. We present experimental and
theoretical results that can be employed to probe various scenarios for physics
beyond the Standard Model.Comment: 222 pp., additional contribution added, typos/layout correcte
Chiral Restoration in Hot and/or Dense Matter
Chiral restoration phase transition in hot and/or dense hadronic matter is
discussed in terms of the BR scaling based on chiral symmetry and scale anomaly
of QCD. The precise connection between the scalar field that figures in the
trace anomaly and the sigma field that figures in the linear model is
established. It is suggested that in hot and/or dense medium, the nonlinear
model linearizes with the help of a dilaton to a linear model
with medium-renormalized constants. The relevance of Georgi's vector symmetry
and/or Weinberg's ``mended symmetry" in chiral restoration is pointed out. Some
striking consequences for relativistic heavy-ion collisions and dense matter in
compact stars following stellar collapse are discussed.Comment: 66 pages, Latex, 19 figures (not included, available on request),
Prepared for Physics Report
International Linear Collider Reference Design Report : Volume 2: Physics at the ICL
This article reviews the physics case for the ILC. Baseline running at 500 GeV as well as possible upgrades and options are discussed. The opportunities on Standard Model physics, Higgs physics, Supersymmetry and alternative theories beyond the Standard Model are described
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