Layered evaluation of interactive adaptive systems : framework and formative methods

Peer reviewedPostprin

Impact of model fidelity in factory layout assessment using immersive discrete event simulation

Discrete Event Simulation (DES) can help speed up the layout design process. It offers further benefits when combined with Virtual Reality (VR). The latest technology, Immersive Virtual Reality (IVR), immerses users in virtual prototypes of their manufacturing plants to-be, potentially helping decision-making. This work seeks to evaluate the impact of visual fidelity, which refers to the degree to which objects in VR conforms to the real world, using an IVR visualisation of the DES model of an actual shop floor. User studies are performed using scenarios populated with low- and high-fidelity models. Study participant carried out four tasks representative of layout decision-making. Limitations of existing IVR technology was found to cause motion sickness. The results indicate with the particular group of naïve modellers used that there is no significant difference in benefits between low and high fidelity, suggesting that low fidelity VR models may be more cost-effective for this group

Providing scientific visualisation for spatial data analysis: criteria and an assessment of SAGE

A consistent theme in recent work on developing exploratory spatial data analysis (ESDA) has been the importance attached to visualization techniques, particularly following the pioneering development of packages such as REGARD by Haslett et al (1990). The focus on visual techniques is often justified in two ways: (a) the power of modern graphical interfaces means that graphics is no longer a way of simply presenting results in the form of maps or graphs, but a tool for the extraction of information from data; (b)graphical, exploratory methods are felt to be more intuitive for non-specialists to use than methods of numerical spatial statistics enabling wider participation in the process of getting data insights. Despite the importance attached to visualisation techniques, very little work has been done to assess the effectiveness of techniques, either in the wider scientific visualisation community, or among those working with spatial data. This paper will describe a theoretical framework for developing visualisation tools for ESDA that incorporates a data model of what the analyst is looking for based on the concepts of "rough" and "smooth" elements of a data set and a theoretical scheme for assessing visual tools. The paper will include examples of appropriate tools and a commentary on the effectiveness of some existing packages

Patient Perceptions of Patient-Empowering Nurse Behaviours, Patient Activation and Functional Health Status in Postsurgical Patients with Life-Threatening Long-Term Illnesses

Aim To explore the trajectory of associations between the nursing care process of patient empowerment during postsurgical hospitalization and postdischarge patient self-management outcomes, specifically patient activation and functional health status. Background Patient-centred care models advocate for patient empowerment in long-term illness care. Postsurgical patients with life-threatening long-term illnesses frequently feel powerless, have unmet needs, decreased functional health status and high readmission rates; however, previous studies of patient empowerment have conceptualized empowerment as an outcome primarily in outpatient settings, with little attention paid to provider processes used to empower patients during hospitalizations. Design A non-experimental, prospective, correlational study. Methods This sample consisted of 113 postsurgical cancer and cardiac patients enrolled between August 2012–February 2013. Patient perceptions of patient-empowering nurse behaviours and baseline patient activation were measured prior to discharge. Patient activation and functional health status were measured 6 weeks following discharge. Data were analysed with multiple linear regression using a simultaneous equation approach. Results Patients reported high perceptions of patient-empowering nurse behaviours and patient activation levels. Functional health status scores were below population norms. Patient perceptions of empowering nurse behaviours were positively associated with postdischarge patient activation, which was positively associated with mental functional health status. Length of stay was the only significant predictor of physical functional health status. Conclusion This study provides further quantitative evidence supporting the relationship between quality nursing care and postdischarge patient outcomes. Intentional use of patient-empowering nurse behaviours could lead to improved patient activation and functional health status in postsurgical patients with life-threatening long-term illnesses

Next steps in implementing Kaput's research programme

We explore some key constructs and research themes initiated by Jim Kaput, and attempt to illuminate them further with reference to our own research. These 'design principles' focus on the evolution of digital representations since the early nineties, and we attempt to take forward our collective understanding of the cognitive and cultural affordances they offer. There are two main organising ideas for the paper. The first centres around Kaput's notion of outsourcing of processing power, and explores the implications of this for mathematical learning. We argue that a key component for design is to create visible, transparent views of outsourcing, a transparency without which there may be as many pitfalls as opportunities for mathematical learning. The second organising idea is that of communication, a key notion for Kaput, and the importance of designing for communication in ways that recognise the mutual influence of tools for communication and for mathematical expression

Design and technology GCE AS and A Level subject content

The AS and A level subject content sets out the knowledge, understanding and skills common to all AS and A level specifications in design and technology. It provides the framework within which awarding organisations create the detail of the subject specification. AS and A Level specifications in design and technology must reflect the subject aims and objectives. Aims and objectives Design and technology is an inspiring, rigorous and practical subject. Specifications in design and technology should encourage students to use creativity and imagination when applying iterative design processes to develop and modify designs, and to design and make prototypes/products1 that solve real world problems, considering their own and others’ needs, wants, aspirations and values. Specifications should enable students to identify market needs and opportunities for new products, initiate and develop design solutions, and make and test prototypes/products. Students should acquire subject knowledge in design and technology, including how a product can be developed through the stages of prototyping, realisation and commercial manufacture. Students should take every opportunity to integrate and apply their understanding and knowledge from other subject areas studied during Key Stage 4, with a particular focus on science and mathematics, and those subjects they are studying alongside AS and A level design and technology

A collaborative platform for integrating and optimising Computational Fluid Dynamics analysis requests

A Virtual Integration Platform (VIP) is described which provides support for the integration of Computer-Aided Design (CAD) and Computational Fluid Dynamics (CFD) analysis tools into an environment that supports the use of these tools in a distributed collaborative manner. The VIP has evolved through previous EU research conducted within the VRShips-ROPAX 2000 (VRShips) project and the current version discussed here was developed predominantly within the VIRTUE project but also within the SAFEDOR project. The VIP is described with respect to the support it provides to designers and analysts in coordinating and optimising CFD analysis requests. Two case studies are provided that illustrate the application of the VIP within HSVA: the use of a panel code for the evaluation of geometry variations in order to improve propeller efficiency; and, the use of a dedicated maritime RANS code (FreSCo) to improve the wake distribution for the VIRTUE tanker. A discussion is included detailing the background, application and results from the use of the VIP within these two case studies as well as how the platform was of benefit during the development and a consideration of how it can benefit HSVA in the future