1,101 research outputs found
Dynamical aspects of fragmentation
In this short communication we address the problem of reducibility in a
highly excited Lennard-Jones system. We show that the probability of emitting
fragments can be described in terms of a single probability through the
binomial expression. However, the Arrhenius law does not hold and the process
can be viewed as a mixture of sequential and simultaneous fragmentation events.Comment: Proceedings for VI Latin American Symposium on Nuclear Physics and
Applications, Iguazu, Argentina (2005). To be published in Acta Phys. Hung.
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The SLIM (Social learning for the integrated management and sustainable use of water at catchment scale) Final Report
Background: SLIM stands for 'Socuak Learning for the Integrated Management and Sustainable Use of Water at Catchment Scale'. It is a multi-country research project funded by the European Commission (DG RESEARCH - 5th Framework Programme for research and technological development, 1998-2002). Its main theme is the investigation of the socio-economic aspects of the sustainable use of water. Within this theme, its main focus of interest lies in understanding the application of social learning as a conceptual framework, an operational principle, a policy instrument and a process of systemic change
Mediating boundaries between knowledge and knowing: ICT and R4D praxis
Research for development (R4D) praxis (theory-informed practical action) can be underpinned by the use of Information and Communication Technologies (ICTs) which, it is claimed, provide opportunities for knowledge working and sharing. Such a framing implicitly or explicitly constructs a boundary around knowledge as reified, or commodified – or at least able to be stabilized for a period of time (first order knowledge). In contrast ‘third-generation knowledge’ emphasizes the social nature of learning and knowledge-making; this reframes knowledge as a negotiated social practice, thus constructing a different system boundary. This paper offers critical reflections on the use of a wiki as a data repository and mediating technical platform as part of innovating in R4D praxis. A sustainable social learning process was sought that fostered an emergent community of practice among biophysical and social researchers acting for the first time as R4D co-researchers. Over time the technologically mediated element of the learning system was judged to have failed. This inquiry asks: How can learning system design cultivate learning opportunities and respond to learning challenges in an online environment to support R4D practice? Confining critical reflection to the online learning experience alone ignores the wider context in which knowledge work took place; therefore the institutional setting is also considered
Expansion dynamics of Lennard-Jones systems
The dynamics of the expansion of a Lennard-Jones system, initially confined
at high density and subsequently expanding freely in the vacuum, is confronted
to an expanding statistical ensemble, derived in the diluted quasi-ideal
Boltzmann approximation. The description proves to be fairly accurate at
predicting average one-body global observables, but important deviations are
observed in the configuration-space structure of the events. Possible
implications for finite expanding physical systems are outlined
Large Area Crop Inventory Experiment (LACIE). User requirements
There are no author-identified significant results in this report
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