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Towards a methodology for the development of integrated IT infrastructures
In this paper, the authors propose and validate
a methodology for the development of integrated
Information Technology (IT) infrastructures. The
motivation for putting forward a new methodology is
grounded on the limitations of the various software
engineering methodologies (traditional) that exist
today. Despite that the traditional methodologies result
in the development of Information Systems (IS) from
scratch, Enterprise Application Integration (EAI)
builds integrated IT infrastructures using existing
applications. This significant difference is associated
with many issues needed to be realised and addressed
like: (a) the changes that such an infrastructure brings
to organisations, (b) the resistance to change and (c)
the extension of IS lifecycle’s. The proposed
methodology consist of eight stages and aims at
supporting software engineers, organisations and
researchers to build integrated IT infrastructures. As a
result the methodology seeks to contribute to the body
of knowledge
Wind Energy and Atmospheric Physics Department annual progress report 1999
The report describes the work of the Wind Energy and Atmospheric Physics Department at Risø National Laboratory in 1999. The research of the department aims to develop new opportunities in the exploitation of wind energy and to map and alleviateatmospheric aspects of environmental problems. The expertise of the department is utilised in commercial activities such as wind turbine testing and certification, training programmes, courses and consultancy services to industry, authorities and Danishand international organisations on wind energy and atmospheric environmental impact. A sum-mary of the department's activities in 1999 is presented, including lists of publications, lectures, committees and staff members
Wind turbine simulation: structural mechanics, fsi and computational steering
A fluid-structure interaction (FSI) validation study of Micon 65/13M wind turbine
with Sandia CX-100 composite blades is presented. KirchhoffLove shell theory is used for
blade structures, while the aerodynamics formulation is performed using a moving-domain
finite-element-based ALE-VMS technique. The structural mechanics formulation is validated
through the eigenfrequency analysis of the CX-100 blade. For coupling between two domains a
nonmatching discretization of the fluid-structure interface is adopted. This adds flexibility and
relaxes the requirements placed on geometry modeling and meshing tools employed. The simulations
are done at realistic wind conditions and rotor speeds. The rotor-tower interaction that
influences the aerodynamic torque is captured. The computed aerodynamic torque generated
by the Micon 65/13M wind turbine compares well with that obtained from on-land field tests.
We conclude by illustrating the application of the Dynamic Data-Driven Applications System
(DDDAS) to investigate the fiber waviness defects embedded in the CX-100 wind turbine blade
Satellite-enabled educational services specification and requirements analysis based on user feedback
Advanced tele-education services provision in remote geographically dispersed user communities (such as agriculture and maritime), based on the specific needs and requirements of such communities, implies significant infrastructural and broadband connectivity requirements for rich media, timely and quality-assured content delivery and interactivity. The solution to broadband access anywhere is provided by satellite-enabled communication infrastructures. This paper aims to present such satellite-based infrastructures that are capable of addressing the core requirements of rich media educational services in remote areas. The paper proceeds to examine a set of services that will realise such satellite-based distance learning systems and to assess the targeted users’ interest in such services. The presented work is undertaken within the framework of the EU-funded Broadband Access Satellite Enabled Education (BASE2) project. Furthermore, requirements analysis, based on the Volere template (Robertson) and on user feedback, is undertaken
Systemic Innovation in a Distributed Network Paradox or Pinnacle?
Previous research has suggested that there is a dichotomy of organisational practices: companies involved in autonomous or modularised innovations, it is argued, benefit from decentralised approaches where coordination primarily takes place through the marketplace, whereas the benefits of systemic innovation are said to be appropriated best by centralised organisations. However, case studies of subcontractors to the Danish wind turbine industry suggest that the ability to meet heterogeneous demands plays an important role for the success of different forms of organisational practices in relation to innovation. The modularised versus systemic architecture approach therefore appears to be a too sweeping dichotomy for describing what can better be perceived as an array of different practices for balancing innovation contribution with the ability of individual firms to appropriate innovation benefits – and a heterogeneous market perception is a core element in building and sustaining this ability.Organisational Forms, Innovation System, Knowledge Complementarities, Value Appropriation
Modular Feature Specification
CRESS (CHISEL Representation Employing Systematic Specification) is a notation and set of tools for graphical specification and analysis of features. It is applicable wherever a system consists of base functionality to which are added optionally selected features. The CRESS notation is introduced for basic diagrams, feature diagrams, and rules governing their behaviour. Although telephony is used to illustrate the approach, CRESS is not limited to this domain. The structure and use of the portable CRESS toolset is explained. CRESS can generate code for a variety of target languages. The strategy for translation to LOTOS is presented, along with some techniques for analysing the generated specifications
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