2,732 research outputs found

    New dynamic bandwidth allocation algorithm analysis: DDSPON for ethernet passive optical networks

    Get PDF
    This project aims to present the state of the art in Dynamic Bandwidth Allocation (DBA) solutions, as well as the study and evaluation of one proposal of DBA algorithm: the Distributed Dynamic Scheduling for EPON (DDSPON), which is the UPC contribution to the research in scheduling algorithms for EPON

    Application of association rules to determine building typological classes for seismic damage predictions at regional scale. The case study of Basel

    Get PDF
    Assessing seismic vulnerability at large scales requires accurate attribution of individual buildings to more general typological classes that are representative of the seismic behavior of the buildings sharing same attributes. One-by-one evaluation of all buildings is a time-and-money demanding process. Detailed individual evaluations are only suitable for strategic buildings, such as hospitals and other buildings with a central role in the emergency post-earthquake phase. For other buildings simplified approaches are needed. The definition of a taxonomy that contains the most widespread typological classes as well as performing the attribution of the appropriate class to each building are central issues for reliable seismic assessment at large scales. A fast, yet accurate, survey process is needed to attribute a correct class to each building composing the urban system. Even surveying buildings with the goal to determine classes is not as time demanding as detailed evaluations of each building, this process still requires large amounts of time and qualified personnel. However, nowadays several databases are available and provide useful information. In this paper, attributes that are available in such public databases are used to perform class attribution at large scales based on previous data-mining on a small subset of an entire city. The association-rule learning (ARL) is used to find links between building attributes and typological classes. Accuracy of wide spreading these links learned on <250 buildings of a specific district is evaluated in terms of class attribution and seismic vulnerability prediction. By considering only three attributes available on public databases (i.e., period of construction, number of floors, and shape of the roof) the time needed to provide seismic vulnerability scenarios at city scale is significantly reduced, while accuracy is reduced by <5%

    A Virtual Representation of the Egyptian Cultural Heritage

    Full text link
    [EN] In Egypt, the Center for Documentation of Cultural and Natural Heritage (CULTNAT) is treating cultural heritage in a holistic approach whether regarding the diversity of themes of cultural heritage or in the case of museums, the presence of objects in the different museums both within the country or abroad (a sort of global virtual museum). The establishment of CULTNAT marks a unique experience in the application of the latest innovations in the world of telecommunications and information technology towards heritage issues. CULTNAT’s main mandate is to document the various aspects of Egypt's tangible and intangible cultural heritage as well as its natural heritage.Saleh, F. (2011). A Virtual Representation of the Egyptian Cultural Heritage. Virtual Archaeology Review. 2(4):45-48. https://doi.org/10.4995/var.2011.4549OJS45482

    January-March 2005

    Get PDF
    • …
    corecore