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Extended Galilean symmetries of non-relativistic strings

We consider two non-relativistic strings and their Galilean symmetries. These strings are obtained as the two possible non-relativistic (NR) limits of a relativistic string. One of them is non-vibrating and represents a continuum of non-relativistic massless particles, and the other one is a non-relativistic vibrating string. For both cases we write the generator of the most general point transformation and impose the condition of Noether symmetry. As a result we obtain two sets of non-relativistic Killing equations for the vector fields that generate the symmetry transformations. Solving these equations shows that NR strings exhibit two extended, infinite dimensional space-time symmetries which contain, as a subset, the Galilean symmetries. For each case, we compute the associated conserved charges and discuss the existence of non-central extensions.Postprint (author's final draft

Charity compliance report December 2012 – December 2014 and beyond

This report provides a thorough analysis of compliance activity that has taken place by the Australian Charities and Not-for-profits Commission from December 2012 until December 2014. Foreword This report uses aggregated data and de-identified information to give readers an insight into the compliance work of the Australian Charities and Not-for-profits Commission. It provides examples of common problems identified and provides practical advice to assist charities to avoid these types of issues occurring. This report also highlights the key areas of concern and the Australian Charities and Not-for-profits Commission\u27s compliance focus for the year ahead

Blending customisation, context-awareness and adaptivity for personalised tangible interaction in cultural heritage

Shaping personalization in a scenario of tangible, embedded and embodied interaction for cultural heritage involves challenges that go well beyond the requirements of implementing content personalization for portable mobile guides. Content is coupled with the physical experience of the objects, the space, and the facets of the context – being those personal or social – acquire a more prominent role. This paper presents a personalization framework to support complex scenarios that combine the physical, the digital, and the social dimensions of a visit. It is based on our experience in collaborating with curators and museum experts to understand and shape personalization in a way that is meaningful to them and to visitors alike, that is sustainable to implement and effective in managing the complexity of context-awareness. The pro posed approach features a decomposition of personalization into multiple layers of complexity that involve a blend of customization on the visitor’s initiative or according to the visitor’s profile, system context-awareness, and automatic adaptivity computed by the system based on the visitor’s behaviour model. We use a number of case studies of implemented exhibitions where this approach was used to illustrate its many facets and how adaptive techniques can be effectively complemented with interaction design, rich narratives and visitors’ choice to create deeply personal experiences. Overarching reflections spanning case studies and prototypes provide evidence of the viability of the proposed frame work, and illustrate the final effect of the user experience

Principales colaboradores

Esta sección ofrece un currículum resumido de los principales colaboradores de esta obra.

Empowering cultural heritage professionals with tools for authoring and deploying personalised visitor experiences

This paper presents an authoring environment, which supports cultural heritage professionals in the process of creating and deploying a wide range of different personalised interactive experiences that combine the physical (objects, collection and spaces) and the digital (multimedia content). It is based on a novel flexible formalism that represents the content and the context as independent from one another and allows recombining them in multiple ways thus generating many different interactions from the same elements. The authoring environment was developed in a co-design process with heritage stakeholders and addresses the composition of the content, the definition of the personalisation, and the deployment on a physical configuration of bespoke devices. To simplify the editing while maintaining a powerful representation, the complex creation process is deconstructed into a limited number of elements and phases, including aspects to control personalisation both in content and in interaction. The user interface also includes examples of installations for inspiration and as a means for learning what is possible and how to do it. Throughout the paper, installations in public exhibitions are used to illustrate our points and what our authoring environment can produce. The expressiveness of the formalism and the variety of interactive experiences that could be created was assessed via a range of laboratory tests, while a user-centred evaluation with over 40 cultural heritage professionals assessed whether they feel confident in directly controlling personalisation

El estatuto del co-sujeto en las situaciones pedagógicas

En el presente estudio el autor analiza los métodos pedagógicos que tratan al alumno, respectivamente, como "objeto" o como "sujeto" de la educación. Se mantiene la tesis de que ambos modelos educativos no son ni rechazables ni aceptables en su plenitud y se opta, en definitiva, por el denominado estatuto de "co-sujeto" donde el maestro y el alumno aparecen como polos sintéticos que se condicionan mutuamente.In this present study the author has analysed the pedagogical methods that dea1 with the pupil, as "object" or "subject" of education. The thesis is maintained that both educational models are neither totally acceptable nor totally acceptable. Finally the statute named "co-subject" is chosen, where teacher and pupil emerge as synthetic poles that condition each other