A conceptual architecture for semantic web services development and deployment

Several extensions of the Web Services Framework (WSF) have been proposed. The combination with Semantic Web technologies introduces a notion of semantics, which can enhance scalability through automation. Service composition to processes is an equally important issue. Ontology technology – the core of the Semantic Web – can be the central building block of an extension endeavour. We present a conceptual architecture for ontology-based Web service development and deployment. The development of service-based software systems within the WSF is gaining increasing importance. We show how ontologies can integrate models, languages, infrastructure, and activities within this architecture to support reuse and composition of semantic Web services

Design and numerical modeling of a pressurized airframe bulkhead joint

The structural loading on a conceptual lap joint in the empennage of a civil aircraft has been investigated. The lap joint interfaces the end-pressure part-hemispherical bulkhead to the cylindrical fuselage. The pressure bulkhead is made of carbon fiber reinforced plastic materials. The aim of the study is to present numerical results of the induced structural loading from the fuselage positive internal pressure differential and the localized high stress intensity field at the lap joint location. A methodology for the appropriate numerical approach to analyze the domed pressure bulkhead is presented. The results of the numerical investigation showed that the laminate loading levels calculated by the use of either initial sizing analytical formulas for pressurized domes or by the use of equilibrium nodal loading from finite element models of low fidelity compared to refined finite element analysis can be significantly underestimated. Some of the implications on carbon fiber reinforced plastic structural sizing at the specified location are developed

Political settlements: the history of an idea in policy and theory

This paper explores how the concept of ‘political settlement’ in statebuilding arose, identifies its essential elements, the level of consensus around them, and tests out some of its normative content. Abstract Over the past five years, several major international development policy statements and declarations have adopted ‘political settlement’ as a framing concept to guide statebuilding practice in fragile and conflict-affected states, and encouraged efforts towards achieving an inclusive, or inclusive enough, political settlement in order to underpin stability. Despite the policy enthusiasm, the concept itself remains elusive. This discussion paper explores how the concept ‘political settlement’ arose and where it came from, identifies its essential elements and the level of consensus around them and tests out some of its normative content. Finally it considers where the concept might go from here

Semantic model-driven development of web service architectures.

Building service-based architectures has become a major area of interest since the advent of Web services. Modelling these architectures is a central activity. Model-driven development is a recent approach to developing software systems based on the idea of making models the central artefacts for design representation, analysis, and code generation. We propose an ontology-based engineering methodology for semantic model-driven composition and transformation of Web service architectures. Ontology technology as a logic-based knowledge representation and reasoning framework can provide answers to the needs of sharable and reusable semantic models and descriptions needed for service engineering. Based on modelling, composition and code generation techniques for service architectures, our approach provides a methodological framework for ontology-based semantic service architecture

Modelling and analyzing adaptive self-assembling strategies with Maude

Building adaptive systems with predictable emergent behavior is a challenging task and it is becoming a critical need. The research community has accepted the challenge by introducing approaches of various nature: from software architectures, to programming paradigms, to analysis techniques. We recently proposed a conceptual framework for adaptation centered around the role of control data. In this paper we show that it can be naturally realized in a reflective logical language like Maude by using the Reflective Russian Dolls model. Moreover, we exploit this model to specify, validate and analyse a prominent example of adaptive system: robot swarms equipped with self-assembly strategies. The analysis exploits the statistical model checker PVeStA

Feasibility study of a 200 watt per kilogram lightweight solar array system

Progress in an investigation of the feasibility of designing a lightweight solar array with a power-to-weight ratio of 200 watts per kilogram is described. This solar array will produce 10,000 watts of electrical power at 1 A.U. at its beginning of life (BOL), and degrade less than 20% over a three year period in interplanetary flight. A review of existing lightweight solar array system concepts is presented along with discussion pertaining to their applicable technology as it relates to a 200 watt/kilogram array. Also presented is a discussion of the candidate development solar cells being considered, and various deployable boom concepts under investigation

Democracy: Concepts, Measures and Relationships

This briefing paper reviews the existing research and debates on the causes and consequences of democracy to provide guidance on the key conceptual and methodological issues surrounding democracy promotion and aid conditionality. It provides three working definitions of democracy; a review of the different strategies and efforts to measure democracy; an examination of the empirical findings on the causes and consequences of democracy; and concludes with a discussion of the dimensions of aid conditionality by examining the efforts by the USAID, the World Bank, and UK Department for International Development (DfID) in linking measures and assessments of governance to the allocation of aid

A laser-induced heat flux technique for convective heat transfer measurements in high speed flows

A technique is developed to measure the local convective heat transfer coefficient on a model surface in a supersonic flow field. The technique uses a laser to apply a discrete local heat flux at the model test surface, and an infrared camera system determines the local temperature distribution due to the heating. From this temperature distribution and an analysis of the heating process, a local convective heat transfer coefficient is determined. The technique was used to measure the local surface convective heat transfer coefficient distribution on a flat plate at nominal Mach numbers of 2.5, 3.0, 3.5, and 4.0. The flat plate boundary layer initially was laminar and became transitional in the measurement region. The experimentally determined convective heat transfer coefficients were generally higher than the theoretical predictions for flat plate laminar boundary layers. However, the results indicate that this nonintrusive optical measurement technique has the potential to measure surface convective heat transfer coefficients in high speed flow fields

International governance and local resistance in Kosovo: The thin line between ethical, emancipatory and exclusionary politics

This paper examines the emergence and implications of local resistance against the practice of liberal peace-building in post-conflict Kosovo, as pursued by the international community and local authorities. Exploring the prospects and limitations of local resistance, as articulated through social movements and institutionalised forms of politics, enables us to examine the applicability and potential implications of post-liberal and emancipatory peace, approaches recently propogated by critical approaches to peace-building. Drawing on an original analysis of the discourse and affirmative action of local resistance against the international governance of Kosovo, this paper will argue that different types of local resistance articulate a thin line between ethical, emancipatory and exclusionary practices. Due to the inherent contradictions of resistance movements, the challenges associated with local ownership, grassroots democratisation, and the emancipation and empowerment of local agency cannot be resolved entirely. Indeed, there is a persistent danger that subalterns articulate their needs and interests not only according to an acceptable public transcript for the group’s inner dynamics, but also in relation to the dominant authority, whether it is local or international. This paper illustrates that where there is power there will be resistance, and where there is resistance there will be exclusion and further subordination