38,259 research outputs found
Network analysis of complex biological systems : boundedness of weakly reversible chemical reaction networks and conditions for synchronisation of coupled oscillators
Imperial Users onl
Paved with Good Intentions: The Failure of Passive Disability Policy in Canada
It is common in the disability community to speak of unfulfilled aspirations for full citizenship and participation in the mainstream of Canadian society. In Canada, as in much of the developed world, many adults with disabilities remain outside the mainstream, especially in regard to economic opportunities. Unfortunately, many of the disability policies currently pursued by Canadian governments are unlikely to improve this situation, and may in fact make it worse. This paper offers a critical analysis of a common instrument of current disability policy, the passive cash benefit. I will focus, in particular, on the effects of passive transfers on prospects for adults with disabilities to reach their full income potential through employment. I will attempt to establish that passive income support strategies â for adults with disabilities and for low-income people in general â force their intended beneficiaries to sacrifice employment prospects for help with short-term income needs, a trade-off that reinforces poverty and dependency over the longer term
A view on the iconic turn from a semiotic perspective
Media are not only a means of communication. From a cognitive perspective, they may be viewed as components of an external, auxiliary memory system (Schönpflug 1997), and contemporary cognitive science âconstrues cognition as a complex system in which cognitive processes are âembodied, situatedâ in environments, and âdistributedâ across people and artifactsâ (Nersessian 2007: 2). In man-machine communication, man-man-communication via digital machinery and especially in the World Wide Web (Heintz 2006, Steels 2006) the âexternalâ components of this system have taken on more and more of the characteristics of our individual, âinternalâ, living and active memory with its richness of sensual and symbolic formats. The intellectual challenge in the drafts of the âmastermindsâ of hypertext (Eisenstein) and multimedia (Lintsbakh) was the detection of temporal/spatial, mathematical and linguistic correspondences between such different sensual and symbolic representations (Bulgakova 2007, Tsivian 2007). The so called âiconicâ or âpictorial turnâ was pulled along by the digital turn, and it may in turn have stimulated and accelerated the digital turn
The Tilting Theory of Contraction Algebras
To every minimal model of a complete local isolated cDV singularity
Donovan--Wemyss associate a finite dimensional symmetric algebra known as the
contraction algebra. We construct the first known standard derived equivalences
between these algebras and then use the structure of an associated hyperplane
arrangement to control the compositions, obtaining a faithful group action on
the bounded derived category. Further, we determine precisely those standard
equivalences which are induced by two-term tilting complexes and show that any
standard equivalence between contraction algebras (up to algebra isomorphism)
can be viewed as the composition of our constructed functors. Thus, for a
contraction algebra, we obtain a complete picture of its derived equivalence
class and, in particular, of its derived autoequivalence group.Comment: 36 pages, proof of Lemma 4.11 corrected and other minor change
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