50 research outputs found
Achieving interoperability between the CARARE schema for monuments and sites and the Europeana Data Model
Mapping between different data models in a data aggregation context always
presents significant interoperability challenges. In this paper, we describe
the challenges faced and solutions developed when mapping the CARARE schema
designed for archaeological and architectural monuments and sites to the
Europeana Data Model (EDM), a model based on Linked Data principles, for the
purpose of integrating more than two million metadata records from national
monument collections and databases across Europe into the Europeana digital
library.Comment: The final version of this paper is openly published in the
proceedings of the Dublin Core 2013 conference, see
http://dcevents.dublincore.org/IntConf/dc-2013/paper/view/17
Progressive tearing and cutting of soft-bodies in high-performance virtual reality
We present an algorithm that allows a user within a virtual environment to
perform real-time unconstrained cuts or consecutive tears, i.e., progressive,
continuous fractures on a deformable rigged and soft-body mesh model in
high-performance 10ms. In order to recreate realistic results for different
physically-principled materials such as sponges, hard or soft tissues, we
incorporate a novel soft-body deformation, via a particle system layered on-top
of a linear-blend skinning model. Our framework allows the simulation of
realistic, surgical-grade cuts and continuous tears, especially valuable in the
context of medical VR training. In order to achieve high performance in VR, our
algorithms are based on Euclidean geometric predicates on the rigged mesh,
without requiring any specific model pre-processing. The contribution of this
work lies on the fact that current frameworks supporting similar kinds of model
tearing, either do not operate in high-performance real-time or only apply to
predefined tears. The framework presented allows the user to freely cut or tear
a 3D mesh model in a consecutive way, under 10ms, while preserving its
soft-body behaviour and/or allowing further animation.Comment: 9 pages, 11 figures, 3 tables, submitted to "International Conference
on Artificial Reality and Telexistence, Eurographics Symposium on Virtual
Environments 2022
Project Elements: A computational entity-component-system in a scene-graph pythonic framework, for a neural, geometric computer graphics curriculum
We present the Elements project, a computational science and computer
graphics (CG) framework, that offers for the first time the advantages of an
Entity-Component-System (ECS) along with the rapid prototyping convenience of a
Scenegraph-based pythonic framework. This novelty allows advances in the
teaching of CG: from heterogeneous directed acyclic graphs and depth-first
traversals, to animation, skinning, geometric algebra and shader-based
components rendered via unique systems all the way to their representation as
graph neural networks for 3D scientific visualization. Taking advantage of the
unique ECS in a a Scenegraph underlying system, this project aims to bridge CG
curricula and modern game engines, that are based on the same approach but
often present these notions in a black-box approach. It is designed to actively
utilize software design patterns, under an extensible open-source approach.
Although Elements provides a modern, simple to program pythonic approach with
Jupyter notebooks and unit-tests, its CG pipeline is not black-box, exposing
for teaching for the first time unique challenging scientific, visual and
neural computing concepts.Comment: 8 pages, 8 figures, 2 listings, submitted to EuroGraphics 2023
education trac
Monitoring Fracture of Steel Corroded Reinforced Concrete Members under Flexure by Acoustic Emission Technique
Acoustic emission (AE) technique is used for monitoring and evaluating the influence of corrosion on the structural behaviour of steel reinforced concrete (RC) beams under three-point flexure test. In this study, steel corrosion was accelerated by electro-chemical method utilising a direct current (DC) power supply and 5% sodium chloride (NaCl) solution. The steel corrosion that was induced into beam specimens casting were estimated at 0%, 4.55% and 32.37%, respectively, according to mass loss of steel reinforcement. Based on observations during static load test, the damage developed in the specimens could be classified into four different stages, namely, micro-cracking, first visible cracks, cracks distribution, as well as damage localization and yielding. Analysis of the AE data reveals distinguishable trends for RA value and average frequency (AF) registered for different corrosion levels, respectively. Moreover, the index of damage (ID) derived from the AE energy parameters obtained during the first stage of damage was found to be useful as an indicator for evaluating the extent of corrosion damage of RC beam specimens at initial loadings. In addition, to provide a practical application of AE toward life span estimation of corroded beam specimen, a Weibull damage function was introduced to estimate the remaining flexural capacity of the beam specimens. Based on analysis as well, it is noted that tensile fracture became more dominant with an increase in corrosion level
MAGES 4.0: Accelerating the world's transition to medical VR training
In this work, we propose MAGES 4.0, a novel Software Development Kit (SDK) to
accelerate the creation of collaborative medical training scenarios in VR/AR.
Our solution offers a versatile authoring platform for developers to create
medical simulations in a future-proof, low-code environment. MAGES breaks the
boundaries between realities since students can collaborate using virtual and
augmented reality devices at the same medical scene. With MAGES we provide a
solution to the 150-year-old training model which is unable to meet the level
of healthcare professionals needed. Our platform incorporates, among others,
the following novel advancements: a) 5G edge-cloud remote rendering and physics
dissection, b) realistic real-time simulation of organic tissues as
soft-bodies, c) a highly realistic cutting and tearing algorithm, d) neural
network assessment for user profiling and, e) a VR recorder to record and
replay or resume the training simulation from any perspective
European Survey on Scholarly Practices and Digital Needs in the Arts and Humanities
This report summarizes the statistical analysis of the findings of a web-based survey conducted by the Digital Methods and Practices Observatory (DiMPO), a working group under VCC2 of the DARIAH research infrastructure (Digital Research Infrastructure for the Arts and Humanities).
In order to provide an evidence-based, up-to-date, and meaningful account of the emerging information practices, needs and attitudes of arts and humanities researchers in the evolving European digital scholarly environment, the web survey involved a transnational team of researchers from more than a dozen countries, and addressed digitally-enabled research practices, attitudes and needs in all areas of Europe and across different arts and humanities disciplines and contexts
DCC&U: An Extended Digital Curation Lifecycle Model
The proliferation of Web, database and social networking technologies has enabled us to produce, publish and exchange digital assets at an enormous rate. This vast amount of information that is either digitized or born-digital needs to be collected, organized and preserved in a way that ensures that our digital assets and the information they carry remain available for future use. Digital curation has emerged as a new inter-disciplinary practice that seeks to set guidelines for disciplined management of information. In this paper we review two recent models for digital curation introduced by the Digital Curation Centre (DCC) and the Digital Curation Unit (DCU) of the Athena Research Centre. We then propose a fusion of the two models that highlights the need to extend the digital curation lifecycle by adding (a) provisions for the registration of usage experience, (b) a stage for knowledge enhancement and (c) controlled vocabularies used by convention to denote concepts, properties and relations. The objective of the proposed extensions is twofold: (i) to provide a more complete lifecycle model for the digital curation domain; and (ii) to provide a stimulus for a broader discussion on the research agenda
WSES/GAIS/SIS-E/WSIS/AAST global clinical pathways for patients with intra-abdominal infections
Intra-abdominal infections (IAIs) are common surgical emergencies and have been reported as major contributors to non-trauma deaths in hospitals worldwide. The cornerstones of effective treatment of IAIs include early recognition, adequate source control, appropriate antimicrobial therapy, and prompt physiologic stabilization using a critical care environment, combined with an optimal surgical approach. Together, the World Society of Emergency Surgery (WSES), the Global Alliance for Infections in Surgery (GAIS), the Surgical Infection Society-Europe (SIS-E), the World Surgical Infection Society (WSIS), and the American Association for the Surgery of Trauma (AAST) have jointly completed an international multi-society document in order to facilitate clinical management of patients with IAIs worldwide building evidence-based clinical pathways for the most common IAIs. An extensive non-systematic review was conducted using the PubMed and MEDLINE databases, limited to the English language. The resulting information was shared by an international task force from 46 countries with different clinical backgrounds. The aim of the document is to promote global standards of care in IAIs providing guidance to clinicians by describing reasonable approaches to the management of IAIs.Peer reviewe