Abstract-Several service-based systems quality assurance proposals 147 that aggregate monitoring and analysis facilities can be found 148 in the literature. To conduct the search of the related work, we 149 have revised the most relevant conferences and journals in the 150 area, selecting those papers that were scoped in the field of 151 SLA monitoring and analysis. Furthermore, we have increased 152 the results by adding relevant papers obtained from experts in 153 the field. Table I summarizes the results of this study. 154We have examined the selected papers under the four factors 155 described in the introduction. The first three factors fall into 156 the functionality of the proposed solution, whereas the fourth 157 factor falls into its architecture. 158Functionality. Considering the three factors for functionality 159 identified in the introduction, we focus on the following issues: 160 (1) Which SLAs are supported, (2a) How the information 161 to configure the monitor is specified, (2b) How the QoS 162 monitoring result is specified and (3) How the violations are 163 explained. 164Architecture. The issues arising from this factor are: (4a) 165 Which architectural elements are needed and (4b) How the 166 architectural elements are structured. 167We analyse these issues below:
Cloud Computing enables the construction and the provisioning of virtualized service-based applications in a simple and cost effective outsourcing to dynamic service environments. Cloud Federations envisage a distributed, heterogeneous environment consisting of various cloud infrastructures by aggregating different IaaS provider capabilities coming from both the commercial and the academic area. In this paper, we introduce a federated cloud management solution that operates the federation through utilizing cloudbrokers for various IaaS providers. In order to enable an enhanced provider selection and inter-cloud service executions, an integrated monitoring approach is proposed which is capable of measuring the availability and reliability of the provisioned services in different providers. To this end, a minimal metric monitoring service has been designed and used together with a service monitoring solution to measure cloud performance. The transparent and cost effective operation on commercial clouds and the capability to simultaneously monitor both private and public clouds were the major design goals of this integrated cloud monitoring approach. Finally, the evaluation of our proposed solution is pre-
a b s t r a c tThe project ''Brick-topia'' was based on a combination of the latest structural analysis and form-finding computational tools with traditional, cheap and effective construction techniques. It is the result of innovation to fight against budget and time. The initial budget was 3000 euros and only seven weeks was the time to look for sponsors, design the pavilion, plan the construction phases and build it.The whole process of designing, decision on the materials, structural analysis and construction is presented in the paper, including exploration on new form-finding methods to redesign a project in situ and research on a new formwork system using scaffolding, cardboard, wire and steel rods and having a cutter as main tool.
Summary Personal Cloud (PC) storage services such as Dropbox or Google Drive have become increasingly popular in the last few years. Unfortunately, these services are still not secure. Even assuming “perfect” data confidentiality, securely sharing a folder in these services is still an issue, and this without mentioning the fact that the existing sharing mechanisms are typically too coarse‐grained by operating at the folder level. This is insufficient in many real situations where it is more natural to grant or deny access to files based on arbitrary user attributes and selected attributes of the file. In this research, we explore these issues and show that fine‐grained access control with strong privacy guarantees is practical in the PC. To investigate the potential practicality, we took our fully fledged open source implementation of a PC system and extended it to support fine‐grained private data sharing through attribute‐based encryption. The result was the first design and implementation of a file synchronization service, called StackSync, where the user retains complete control over his or her own data when sharing it. Never before, attribute‐based encryption had been implemented and tested on a real PC service. Our results show that StackSync is both secure and efficient for the PC.
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Cities face the challenge of transforming existing buildings to be reused, particularly those that are underused or not used at all. Tackling this issue, the European Commission approved in 2014 a package of measures to promote a circular economy. According to this agreement, our cities can be more sustainable and resilient by transforming these underused existing buildings with proposals for their adaptive temporary reuse, favoring the citizens' well-being and quality of life and promoting social inclusion and economic growth with respect for the environment. This paper studies the role of heritage education in adaptive urban reuse, exploring the possibilities and methodologies for the reprogramming of existing buildings for different types of activities to offer citizens and communities the opportunity to participate in the life of the city, favouring their social inclusion. In contrast to the common new-builds or refurbishment commissions, reuse offers a greater possibility of disseminating, transforming, and reinventing architectural methodologies and approaches to integrate in the design process forms of citizen participation, favouring the transition towards a model of a circular economy and more sustainable consumption. The paper analyses the possibilities of urban reuse applied to five major public heritage buildings in Barcelona: the Post Office Building, the Old Customs House, the France Train Station, the Martorell Museum and the Castle of the Three Dragons. Each of them has a particular condition regarding current uses and its public owning institution and presents specific characteristics regarding building typology, heritage protection, conservation and construction materials and techniques. The buildings date either from the late 19th century or the early 20th century and are grouped along a 1 km axis on the threshold between the historic center and the port of the city. This unique location represents a great strategic potential for the regeneration and urban reactivation of the city.
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