Towards Deployments Contracts in Large Scale Clusters & Desktop Grids

While many dream and talk about Service Level Agreement (SLA) and Quality of Service (QoS) for Service Oriented Architectures (SOA), the practical reality of Grid computing is still far from providing effective techniques enabling such contractual agreements. Towards this goal, this paper provides an overview of the techniques offered by ProActive to set and use contractual agreements. Based on the identification of roles, application developer, infrastructure manager, application user, the actors of a Grid environment can specify what is required or what is provided at various levels. The results are both flexibility and adaptability, matching the application constraints and the environment characteristics with various techniques

The EU still waiting for a seamless electricity transmission system : missing pillars and roadblocks

The EU does not have a truly seamless electricity transmission system in place yet. Borders still matter when system planning, expansion and operation are at stake. This fact has a negative consequence on the achievement of the European goals in the field of electricity. Three core pillars, currently missing, must be addressed by national and European policy-makers to move forward: coordination of actions and decisions, sharing of benefits and costs, and solidarity beyond costs and benefits. The importance of this pillars is apparent when considering two issues that have become particularly critical in the last few years: redispatching actions and electricity crisis management. If the three missing pillars are not taken seriously, issues like those of redispatching and crisis management can transform in insurmountable roadblocks on the path towards the establishment of a single market for electricity with high levels of security of supply and a low carbon generation mix

A formal architecture-centric and model driven approach for the engineering of science gateways

From n-Tier client/server applications, to more complex academic Grids, or even the most recent and promising industrial Clouds, the last decade has witnessed significant developments in distributed computing. In spite of this conceptual heterogeneity, Service-Oriented Architecture (SOA) seems to have emerged as the common and underlying abstraction paradigm, even though different standards and technologies are applied across application domains. Suitable access to data and algorithms resident in SOAs via so-called ‘Science Gateways’ has thus become a pressing need in order to realize the benefits of distributed computing infrastructures.In an attempt to inform service-oriented systems design and developments in Grid-based biomedical research infrastructures, the applicant has consolidated work from three complementary experiences in European projects, which have developed and deployed large-scale production quality infrastructures and more recently Science Gateways to support research in breast cancer, pediatric diseases and neurodegenerative pathologies respectively. In analyzing the requirements from these biomedical applications the applicant was able to elaborate on commonly faced issues in Grid development and deployment, while proposing an adapted and extensible engineering framework. Grids implement a number of protocols, applications, standards and attempt to virtualize and harmonize accesses to them. Most Grid implementations therefore are instantiated as superposed software layers, often resulting in a low quality of services and quality of applications, thus making design and development increasingly complex, and rendering classical software engineering approaches unsuitable for Grid developments.The applicant proposes the application of a formal Model-Driven Engineering (MDE) approach to service-oriented developments, making it possible to define Grid-based architectures and Science Gateways that satisfy quality of service requirements, execution platform and distribution criteria at design time. An novel investigation is thus presented on the applicability of the resulting grid MDE (gMDE) to specific examples and conclusions are drawn on the benefits of this approach and its possible application to other areas, in particular that of Distributed Computing Infrastructures (DCI) interoperability, Science Gateways and Cloud architectures developments

A new EU energy technology policy towards 2050 : which way to go?

Each semester the THINK project publishes two research reports based on topics proposed by the European Commission.Topic 9QM-31-12-303-EN-CQM-31-12-303-EN-NChallenges for policy makers are huge if the EU climate policy goal of reducing greenhouse gas emissions to 80-95% below 1990 levels by 2050 shall be reached. There is no doubt that a new energy technology policy design for the post-2020 period is needed, not only because the current policy framework is running out in 2020, but also because of increasing global competitive pressure in the low-carbon technology sectors. Moreover, as market actors are calling for new, transparent and lasting policy commitments now, the policy will likely be negotiated in times of financial crisis and institutional frictions in the EU, of which no one can predict its duration. To contribute to this debate and assist DG ENER in preparing a new Communication on ‘Energy Technologies in a future European Energy Policy’, this THINK report develops and discusses possible paths for a renewed EU energy technology policy towards 2050. We give recommendations for a renewed post-2020 SET Plan and European technology push taking into account that the policy context is uncertain and that not all possible futures are recognized in the EU Energy Roadmap 2050 yet.The THINK project (2010-2013) is funded by the European Commission under the Seventh Framework Programme, Strategic Energy Technology Plan. (Call FP7-ENERGY-2009-2, Grant Agreement no: 249736). Coordinator: Prof. Jean-Michel Glachant and Dr. Leonardo Meeus, Florence School of Regulation, Robert Schuman Centre for Advanced Studies, European University Institute

Governing Irregular Migration: Logics and Practices in Spanish Immigration Policy

Since the first substantive changes to Spanish immigration laws in the 1980s, immigration to Spain and the policies designed to govern it have changed greatly. The pace of this continuous transformation has recently slowed down, offering a good opportunity to reflect on the ways in which irregular migration has been governed over time. Taking stock of more than three decades of debates in the Spanish Congress, laws, policy documents, interview findings and practices, this dissertation offers a sociological analysis of the messy process of immigration governance in a border country of the European Union. The dissertation starts by analyzing the early problematizations of irregular migration in Spain, understood as the result of discursive and non-discursive practices that provide specific ways of thinking about and acting upon objects. Complicating the assumption that policy shifts are a straightforward result of changes in the political orientation of ruling parties, the dissertation traces the existence of three intersecting sets of logics and practices that have shaped Spanish immigration policy over time: (1) culturalization: a set of logics and practices intimately tied to the history of Spanish colonialism and governing migrants as cultural subjects; (2) labouralization: a set of logics and practices that attempt to manage labour migration flows and frame irregular migrants as workers who contribute to the national labour market; and (3) securitization: a set of logics and practices focused on the defence of state sovereignty, the prevention of irregular entry and the framing of irregular migrants as potential threats. The organization of heterogeneous practices into three broad categories acts as a heuristic device to show how various complementary and at times contradictory logics and practices work together to create a practical regime of migration governance based on a long probationary period during which irregular migrants are scrutinized and policed. Ultimately, this dissertation posits the existence in Spain of a regime governing immigration through probation. This regime entails the rescaling of bordering practices across space and time, the deployment of a space of legal liminality in which irregular migrants are kept, and the use of conditionality and discretion in the assessment of desirability

Satellite communications: the political determination of technological development, 1961-1975

The thesis sets forth a model relating political contention to technological development. The selective realisation of a technical potentiality is shown to have been determined by conflict and negotiation among shifting alliances of state and private-industrial entities, each attempting to impose its requirements upon an emergent technology and thereby to dictate the precise form and pace of technical development. The 'course of communications satellite development is examined during the technology's formative period from 1961 to 1975--as the product of struggles over technological control. Negotiation centered upon control, and contending modes of technical development were promoted and opposed on the basis of their perceived consequences upon the distribution of effective control over the technology. The initial mode of satellite development lasted from 1961 to 1971 and is characterised as pre-emptive underdevelopment; urgency and haste were combined with tight constraints on the qualitative breadth allowed to technological articulation. Pre-emptive underdevelopment derived from an uneasy political accommodation struck among constituencies dominant during this phases the U.S. government, American communications carrier industry and a Western European intergovernmental bloc. The reigning compromise was directed toward expediting satellite development sufficiently to forestall rival deployments without endangering existing and anticipated interests in both satellite and competitive technologies. Technical development beneath a minimum level risked undermining the regime of control by leaving open the possibility of rival satellite systems; but development beyond a maximum level would have harmed the outstanding industrial and political interests in whose defence control was sought, while subverting the control regime by widening the legitimate scope for multinational participation in authority over the technology. Pre-emptive underdevelopment, it is argued, was succeeded largely by the products of its own success in meeting the policy requirements of initially dominant entities and in thus reducing the continued importance of satellite technology as a political arena and instrumentality. Restraints upon development could therefore, in the post-1971 period, be relaxed, while the growing demand for a wider array of satellite services encouraged emergence of a more intensive mode of technological development under the auspices of a de-cartelised, quasi-federal and multinational political regime

Machine Learning-based Orchestration Solutions for Future Slicing-Enabled Mobile Networks

The fifth generation mobile networks (5G) will incorporate novel technologies such as network programmability and virtualization enabled by Software-Defined Networking (SDN) and Network Function Virtualization (NFV) paradigms, which have recently attracted major interest from both academic and industrial stakeholders. Building on these concepts, Network Slicing raised as the main driver of a novel business model where mobile operators may open, i.e., “slice”, their infrastructure to new business players and offer independent, isolated and self-contained sets of network functions and physical/virtual resources tailored to specific services requirements. While Network Slicing has the potential to increase the revenue sources of service providers, it involves a number of technical challenges that must be carefully addressed. End-to-end (E2E) network slices encompass time and spectrum resources in the radio access network (RAN), transport resources on the fronthauling/backhauling links, and computing and storage resources at core and edge data centers. Additionally, the vertical service requirements’ heterogeneity (e.g., high throughput, low latency, high reliability) exacerbates the need for novel orchestration solutions able to manage end-to-end network slice resources across different domains, while satisfying stringent service level agreements and specific traffic requirements. An end-to-end network slicing orchestration solution shall i) admit network slice requests such that the overall system revenues are maximized, ii) provide the required resources across different network domains to fulfill the Service Level Agreements (SLAs) iii) dynamically adapt the resource allocation based on the real-time traffic load, endusers’ mobility and instantaneous wireless channel statistics. Certainly, a mobile network represents a fast-changing scenario characterized by complex spatio-temporal relationship connecting end-users’ traffic demand with social activities and economy. Legacy models that aim at providing dynamic resource allocation based on traditional traffic demand forecasting techniques fail to capture these important aspects. To close this gap, machine learning-aided solutions are quickly arising as promising technologies to sustain, in a scalable manner, the set of operations required by the network slicing context. How to implement such resource allocation schemes among slices, while trying to make the most efficient use of the networking resources composing the mobile infrastructure, are key problems underlying the network slicing paradigm, which will be addressed in this thesis

Technology for large space systems: A special bibliography with indexes

This bibliography lists 460 reports, articles, and other documents introduced into the NASA scientific and technical information system between January 1, 1968 and December 31, 1978. Its purpose is to provide helpful information to the researcher, manager, and designer in technology development and mission design in the area of the Large Space Systems Technology (LSST) Program. Subject matter is grouped according to systems, interactive analysis and design, structural concepts, control systems, electronics, advanced materials, assembly concepts, propulsion, and flight experiments

Harnessing Knowledge, Innovation and Competence in Engineering of Mission Critical Systems

This book explores the critical role of acquisition, application, enhancement, and management of knowledge and human competence in the context of the largely digital and data/information dominated modern world. Whilst humanity owes much of its achievements to the distinct capability to learn from observation, analyse data, gain insights, and perceive beyond original realities, the systematic treatment of knowledge as a core capability and driver of success has largely remained the forte of pedagogy. In an increasingly intertwined global community faced with existential challenges and risks, the significance of knowledge creation, innovation, and systematic understanding and treatment of human competence is likely to be humanity's greatest weapon against adversity. This book was conceived to inform the decision makers and practitioners about the best practice pertinent to many disciplines and sectors. The chapters fall into three broad categories to guide the readers to gain insight from generic fundamentals to discipline-specific case studies and of the latest practice in knowledge and competence management