Human Values as the Basis for Sustainable Information System Design

Information systems (IS) play an increasing role for individual well-being [3], for the environment [4], and for society at large [5]. Considering sustainability in IS development is therefore becoming paramount. However, companies today associate sustainability with extra cost and burden on their operations. As a result, many view sustainability more as a demand and a challenge rather than an opportunity. In this article, we argue that companies should rethink this attitude, as both sustainability and a business model can be understood as deeply rooted in human values

Automatic Differentiation Tools in Optimization Software

We discuss the role of automatic differentiation tools in optimization software. We emphasize issues that are important to large-scale optimization and that have proved useful in the installation of nonlinear solvers in the NEOS Server. Our discussion centers on the computation of the gradient and Hessian matrix for partially separable functions and shows that the gradient and Hessian matrix can be computed with guaranteed bounds in time and memory requirementsComment: 11 page

Expressing business rules : a fact based approach : a thesis presented in partial fulfilment of the requirements for the degree of Master of Philosophy in Information Systems at Massey University, Palmerston North, New Zealand

Numerous industry surveys have suggested that many IT projects still end in failure. Incomplete, ambiguous and inaccurate specifications are cited as a major causal factor. Traditional techniques for specifying data requirements often lack the expressiveness with which to model subtle but common features within organisations. As a consequence, categories of business rules that determine the structure and behaviour of organisations may not be captured until the latter stages of the systems development lifecycle. A fact-based technique called Object Role Modelling (ORM) has been investigated as an altemative approach for specifying data requirements. The technique's ability to capture and represent a wide range of data requirements rigorously, but still in a form comprehensible to business people, could provide a powerful tool for analysts. In this report, ORM constructs have been synthesised with the concepts and definitions provided by the Business Rules Group (BRG), who have produced a detailed taxonomy of business rule categories. In doing so, business rules discovered in an organisation can be expressed in a form that is meaningful to both analysts and business people. Exploiting the expressive simplicity of a conceptual modelling technique to articulate an organisation's business rules could help to fill a significant requirements gap

An Empirical Investigation of the Utility of ‘pre-CIM’ models

that, by allowing a variety of stakeholders to take part in modelling, projects will be both more efficient than traditional approaches and will produce software that meets the needs of those stakeholders. This will be facilitated by transforming initial (CIM), models to design (PIM) and implementation (PSM). However, it follows that to gain fully from this strategy the initial models, which are the major driver for communication and validation of requirements and business needs, must be appropriate to this usage. The VIDE project was an EC funded project which produced a successful model driven development tool-set, incorporating a variety of modelling capabilities, at each stage of the MDA process. Aside from support for model transformations, one of the motivations for VIDE was to provide accessible models for those stakeholders representing the client (or business) who may not share the modelling perspective and experience of software engineers. This paper reports upon an empirical study which attempts to assess whether our proposed ‘pre-CIM’ models provide a more palatable starting point for users. In brief, our results suggest that the pre-CIM notation provides an accessible starting point for modelling, and enhance the modeller’s experience whilst also suggesting that the use of the notation may have a positive impact on the quality of subsequent models

Initial thoughts on rapid prototyping techniques

This paper sets some context, raises issues, and provides our initial thinking on the characteristics of effective rapid prototyping techniques.After discussing the role rapid prototyping techniques can play in the software lifecycle, the paper looks at possible technical approaches including: heavily parameterized models, reusable software, rapid prototyping languages, prefabrication techniques for system generation, and reconfigurable test harnesses.The paper concludes that a multi-faceted approach to rapid prototyping techniques is needed if we are to address a broad range of applications successfully -- no single technical approach suffices for all potentially desirable applications

The current state of accessibility of MOOCs: What are the next steps?

Accessibility focuses on supporting people with disabilities – such as those related to auditory, cognitive, neurological, physical, speech, and vision requirements. Massive Open Online Courses (MOOCs) are no longer a novelty and the technologies associated with them should cater to all users irrespective of their accessibility requirements. In this paper, we will discuss the current state of research related to accessibility of MOOCs. We will then outline a research plan towards developing recommendations for the effective design of accessible MOOCs. The plan includes stages such as developing an evaluation instrument, evaluation of existing MOOCs and conducting empirical research with design teams of MOOCs and learners (MOOC-users)

Design of a Low-Cost Microstrip Directional Coupler with High Coupling for a Motion Detection Sensor

A coupled-line coupler based on the asymmetric cascade connection of two coupled line sections is used to achieve a high coupling factor using low-cost material and technology in the X frequency band, and its performance is compared with a standard quarter-wave, coupled-line coupler, showing an increase in the coupling factor of about 3 dB. The proposed coupler can be effectively used in a Doppler motion detection sensor, due to its strong coupling and relatively high isolation. The coupler is designed through a simple, yet rigorous, equivalent circuital model. Then,anoptimizationprocedurewasperformedusingthecommercialsoftwareAnsysHFSSinorder to compensate for losses and second order effects. A prototype of the designed coupler was realized, and the measured data show very good agreement with simulations