BIM semantic-enrichment for built heritage representation

In the built heritage context, BIM has shown difficulties in representing and managing the large and complex knowledge related to non-geometrical aspects of the heritage. Within this scope, this paper focuses on a domain-specific semantic-enrichment of BIM methodology, aimed at fulfilling semantic representation requirements of built heritage through Semantic Web technologies. To develop this semantic-enriched BIM approach, this research relies on the integration of a BIM environment with a knowledge base created through information ontologies. The result is knowledge base system - and a prototypal platform - that enhances semantic representation capabilities of BIM application to architectural heritage processes. It solves the issue of knowledge formalization in cultural heritage informative models, favouring a deeper comprehension and interpretation of all the building aspects. Its open structure allows future research to customize, scale and adapt the knowledge base different typologies of artefacts and heritage activities

BIM and Behavioural Simulation for existing buildings re-use design

This paper presents the development of a modelling and simulation approach oriented to the prediction of possible re-use phenomena in the field of existing buildings and built heritage. Its scope is to support the complex balancing of conservation and functional requirements. The approach is based on an Agent-Based Modeling approach that includes entities belonging to the three macro areas - building, use process and users – considered

The role of semantic enrichment in Building Information Modelling

In current application of Building Information Modelling to building design processes, two main limits have emerged: 1) restricted representation spectrum and 2) inefficiency in supporting collaboration because of the low-level semantics shared among the actors. The objective of this paper is to provide a conceptual framework about these two relevant aspects of collaboration in BIM methodology, as well as to demonstrate the necessity of moving from modelling approaches based on information to innovative representation systems based on knowledge

An ontology-based system to support agent-based simulation of building use

The prediction and evaluation of future building response to its intended use and users is a complex task that designers have to face during the design process. As matter of fact, few methods exist that can help designers in such task, despite its importance in the definition of the building quality; norms and regulations, personal designer's experience, post-occupancy evaluation have shown their limit to provide predictive models of the complex phenomenon of human behaviour in built environments. With the increasing of computing power, virtual simulation techniques have been introduced in building design to control, manage and predict complex systems of building performances such as its energy or structural behaviour, but not to representation of buildings while-in-use. The Agent-Based Modelling and Simulation (ABMS) paradigm has been applied in building design to simulation of specific aspects of human behaviour and in specific occurrences (for instance in fire egress simulations), while a more extensive representation of users actions, behaviours, and activities is still missing. In order to overcome this lack, in this paper we propose to support agent-based simulation with a knowledge base, developed by means of ontologies and able to provide a structured system of data about human-building interaction, useful as start hypotheses for Agent-based Simulation. For its development, we rely on the general template of building knowledge management already proposed by the research group (Carrara et al., 2009), extending it to representation of the whole system users-built environment. The proposed general template, configured by the meaning - properties - rules structure, allows the formalization of users/agents entities, whose parameter, attributes and behavioural rules can encode several 'aspects' of real users and their interactions with the other entities (building components, furniture, other people) in a built environment. Currently, a first application has been developed dealing with the virtually testing of a small hospital ward, in order to evaluate the reliability and the potentiality of such approach. COPYRIGHT: © 2012 The authors

A Simulation Model for Logical and Operative Clash Detection

The introduction of the Building Information Modeling (BIM) approach has facilitated the management process of documents produced by different kinds of professionals involved in the design and/or renovation of a building, through identification and subsequent management of geometrical interferences (Clash Detection). The methodology of this research proposes a tool to support Clash Detection, introducing the logical-operative dimension, that may occur with the presence of a construction site within a hospital structure, through the integration of a BIM model within a Game Engine environment, to preserve the continuity of daily hospital activities and trying to reduce negative impacts, times and costs due to construction activities

Reasoning in Common Data Environments. Re-thinking CDEs to enhance collaboration in BIM processes

In BIM processes, the concept of Common Data Environment - CDE - has often been depicted as a key element for successful collaboration and information sharing among different actors but, in current practice, acts as a mere documentation repository ineffective for true collaborative purposes. Therefore, the idea of CDE seems to be overrated on the one hand and unexploited on the other, while effective collaboration is still far from being decisively supported. To overcome this lack, the present research focuses on the definition of a new generation of CDEs, enhanced with an information level for knowledge integration provided by different information carriers such as models and datasets. The paper discusses its development through a graph database platform and dedicated methodologies for data retrieval and query, to verify coherence and consistency of information among different models

Signal Processing-Assisted Protocols and Algorithms for Cooperating Objects and Wireless Sensor Networks

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Play&Tune: user-feedback in the development of a serious game for optimising hearing aid orientation

Many hearing aid (HA) users are dissatisfied with HA performance in social situations. One way to improve HA outcomes is training users to understand how HAs work. Play&Tune was designed to provide this training, and to foster autonomy in hearing rehabilitation. We carried out two prototype evaluations and a pre-release evaluation of Play&Tune with 71 HA users, using an interview or online survey. Users gave detailed feedback on their experiences with the app. Most participants enjoyed learning about HAs and expressed a desire for autonomy over their HA settings. Our case study reinforces the importance of user-feedback during app development

Pediatric males receiving hematopoietic stem cell transplant lose their male disadvantage in disease risk after the procedure: A retrospective observational study

Sex differences play a relevant role in cancer susceptibility, incidence and survival. Exploring such differences is difficult because of the close interplay of genetic, epigenetic and hormonal factors. However, a better understanding of the role of such disparities in cancer mechanisms could improve its prevention and therapy. Our study explores how sex differences in pediatric outcomes vary after undergoing first and advanced-line therapy for hematological malignancies. The primary goal was to evaluate if sex differences in pediatric outcomes after first-line therapy persist after allogeneic hematopoietic stem cell transplantation (HSCT). The secondary goal was to analyze sex differences in disease risk at onset and pediatric outcomes after first-line therapy to compare our results with the literature's reported results. Among a total of 485 patients (280 males, 205 females) admitted for hematological malignancies, disease risk at the onset was significantly higher in males (P < .05). One hundred and seventy-four patients (111 males and 63 females) had a high-risk disease requiring HSCT. Before HSCT, all patients underwent myeloablative conditioning, which substantially impaired gonadal function. Although the number of boys undergoing HSCT was almost double that of girls, there were no sex-related differences in overall survival, cancer relapse and complications after HSCT exposure (P > .05). These findings suggest that the existing sex differences in cancer risk ab initio can be somehow flattened by a conditioning regimen, shedding new light on the role of hormonal factors in cancer mechanism and management

Temperature Profiles Along the Root with Gutta-percha Warmed through Different Heat Sources

To evaluate temperature profiles developing in the root during warm compaction of gutta-percha with the heat sources System B and System MB Obtura (Analityc Technology, Redmond, WA, USA). Thirty extracted human incisor teeth were used. Root canals were cleaned and shaped by means of Protaper rotary files (Dentsply-Maillefer, Belgium), and imaging was performed by micro-CT (Skyscan 1072, Aartselaar, Belgium)