We discuss issues arising from the design, implementation and first use of a prototype infrastructure for distributed collective practice (IDCP), and reflect upon their intersection with some of the themes emerging from the Paris 2000 IDCP workshop. The problem of maintaining coherence in a distributed system is of central interest to us. We focus on the notion of representational coherence, an...

This paper provides an overview of emerging activity patterns on Cloudworks, a specialised site for sharing and debating ideas as well as resources on teaching, learning and scholarship in education. It provides an overview of activities such as ‘flash debates’, ‘blended workshops’ and ‘open reviews’ and seeks to situate dialogic interchanges and structures of involvement within the following t...

What can happen if we combine the best ideas from the Social Web and Semantic Web? The Social Web is an ecosystem of participation, where value is created by the aggregation of many individual user contributions. The Semantic Web is an ecosystem of data, where value is created by the integration of structured data from many sources. What applications can best synthesize the strengths of these t...

In this report we briefly discuss about two aspects related to the understanding of complex networks’ structure and dynamics. First of all, is shown how we can use an Information theory approach to describe networks’ characteristics such as heterogeneity and assortativeness; in addition, some network models like “Random Graphs“ and “Lattice Networks“ are classified following that approach. Afte...

We investigate the nuclear collective excitations of Wigner-Seitz cells containing nuclear clusters immersed in a gas of neutrons. This baryonic non-uniform system is specific to the structure of inner crust matter of neutron stars. The collective excitations are studied in the framework of a spherical HartreeFock-Bogoliubov + Quasiparticle Random Phase Approximation, formulated in coordinate r...

This paper raises the question of collective decision making under possibilistic uncertainty. We study several egalitarian decision rules and show that in the context of a possibilistic representation of uncertainty, the use of an egalitarian collective utility function allows us to get rid of the Timing Effect. Making a step further, we prove that if both the agents’ preferences and the collec...

Andrea Cavagna, Lorenzo Del Castello, Irene Giardina, Tomas Grigera, Asja Jelic, Stefania Melillo, Thierry Mora , Leonardo Parisi, Edmondo Silvestri, Massimiliano Viale, and Aleksandra M. Walczak Istituto Sistemi Complessi (ISC–CNR), Via dei Taurini 19, 00185 Roma, Italy Dipartimento di Fisica, “Sapienza” Universitá di Roma, P.le Aldo Moro 2, 00185 Roma, Italy Initiative for the Theoretical Sci...

Hair is one of the crucial elements in representing believable digital humans. It is one of the most challenging elements, too, due to the large number of hairs on a human head, their length, and their complex interactions. Hair appearance, in rendering and simulation, is dominated by collective properties, yet most of the current approaches model individual hairs. In this paper we build on the...

Exact side eeects of subroutine calls are essential for exact interprocedural dependence analysis. To summarize the side eeect of multiple array references, a collective representation of all the array elements accessed is needed. So far all existing forms of collective summary of side eeects of multiple array references are approximate. In this paper, we propose an approach for exact in-terpro...