3 resultados para Pequenas e médias empresas - Aveiro (Portugal)

em Queensland University of Technology - ePrints Archive


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The IEEE Wireless LAN standard has been a true success story by enabling convenient, efficient and low-cost access to broadband networks for both private and professional use. However, the increasing density and uncoordinated operation of wireless access points, combined with constantly growing traffic demands have started hurting the users' quality of experience. On the other hand, the emerging ubiquity of wireless access has placed it at the center of attention for network attacks, which not only raises users' concerns on security but also indirectly affects connection quality due to proactive measures against security attacks. In this work, we introduce an integrated solution to congestion avoidance and attack mitigation problems through cooperation among wireless access points. The proposed solution implements a Partially Observable Markov Decision Process (POMDP) as an intelligent distributed control system. By successfully differentiating resource hampering attacks from overload cases, the control system takes an appropriate action in each detected anomaly case without disturbing the quality of service for end users. The proposed solution is fully implemented on a small-scale testbed, on which we present our observations and demonstrate the effectiveness of the system to detect and alleviate both attack and congestion situations.

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Historic house museums form a significant component of the built heritage and social history of a country. They vary from the elaborate mansions of the wealthy to modest dwellings of the working class. Regardless of the original owner's status in society these house museums are vital to an understanding of architecture, culture and society from a bygone era. The Newstead House, the oldest surviving residence, in Brisbane, is the first house to be designated a 'Historic House Museum' in Queensland. It is a representative example of a house that demonstrates the British colonial heritage of 19th century Australia. Originally a modest cottage, on 34 acres of land, the Newstead house was built by a Scottish migrant. The ownership of the house and land changed many times, during the period from 1847 to 1939. During this period a series of prominent residents of Brisbane either owned or rented this residence. They included, an officer of the Royal Navy, politicians, magistrates, merchant ship owners, and a Consul General of the United States of America. As a result, the house went through a series of renovations and extensions to accommodate the needs of its owners and their position in society. This paper aims to investigate the significance of historic museum houses in educating the community on aspects of social history, culture and architecture of 19th century Australia. It will focus on the heritage listed Newstead House as a case study to demonstrate the significance of the house as an artefact and an educational tool.

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Tanzania has a rich and diverse cultural history based on community cultural life. However, at present, young people have limited opportunity to exploit this richness of creative expressions and engage in creative jobs as their future career. Hence, the significant challenge remains: how to integrate Intangible cultural heritage elements and learning strategy as a means of promoting creative jobs for youth. This paper presents a case study on 'Strategies for youth employment in Tanzania: A creative industries approach'. The case study employed mixed methods incorporating questionnaires, interviews and focus groups and was held in Dar-Es-Salaam, Mwanza, Dodoma, Lindi and Morogoro from July to October, 2012. This paper discusses some of the issues and argues that there is no virtual utilization of the intangible cultural heritage knowledge and skills in 'putting education to work' (UNESCO, 2012) for the better prospects of youth. Although the discussion is specific to Tanzania, the case may also apply to other developing countries.