317 research outputs found
True Cost of Water: monetization of water risks, shared value creation, and local acceptability of extractive projects
Among industrial sectors, water-related risks are undoubtedly most closely associated with the extractive industries. To date, the response by the sector has been limited to funding philanthropic projects and implementing  Corporate Social Responsibility. However, Veolia has developed a decision-making tool that monetizes water risks, with a view to not only reducing costs and preventing risks, but also creating new business and social opportunities
Mathematical Foundations for a Compositional Account of the Bayesian Brain
This dissertation reports some first steps towards a compositional account of
active inference and the Bayesian brain. Specifically, we use the tools of
contemporary applied category theory to supply functorial semantics for
approximate inference. To do so, we define on the `syntactic' side the new
notion of Bayesian lens and show that Bayesian updating composes according to
the compositional lens pattern. Using Bayesian lenses, and inspired by
compositional game theory, we define fibrations of statistical games and
classify various problems of statistical inference as corresponding sections:
the chain rule of the relative entropy is formalized as a strict section, while
maximum likelihood estimation and the free energy give lax sections. In the
process, we introduce a new notion of `copy-composition'.
On the `semantic' side, we present a new formalization of general open
dynamical systems (particularly: deterministic, stochastic, and random; and
discrete- and continuous-time) as certain coalgebras of polynomial functors,
which we show collect into monoidal opindexed categories (or, alternatively,
into algebras for multicategories of generalized polynomial functors). We use
these opindexed categories to define monoidal bicategories of cilia: dynamical
systems which control lenses, and which supply the target for our functorial
semantics. Accordingly, we construct functors which explain the bidirectional
compositional structure of predictive coding neural circuits under the free
energy principle, thereby giving a formal mathematical underpinning to the
bidirectionality observed in the cortex. Along the way, we explain how to
compose rate-coded neural circuits using an algebra for a multicategory of
linear circuit diagrams, showing subsequently that this is subsumed by lenses
and polynomial functors.Comment: DPhil thesis; as submitted. Main change from v1: improved treatment
of statistical games. A number of errors also fixed, and some presentation
improved. Comments most welcom
Open Dynamical Systems as Coalgebras for Polynomial Functors, with Application to Predictive Processing
We present categories of open dynamical systems with general time evolution
as categories of coalgebras opindexed by polynomial interfaces, and show how
this extends the coalgebraic framework to capture common scientific
applications such as ordinary differential equations, open Markov processes,
and random dynamical systems. We then extend Spivak's operad Org to this
setting, and construct associated monoidal categories whose morphisms represent
hierarchical open systems; when their interfaces are simple, these categories
supply canonical comonoid structures. We exemplify these constructions using
the 'Laplace doctrine', which provides dynamical semantics for active
inference, and indicate some connections to Bayesian inversion and coalgebraic
logic.Comment: In Proceedings ACT 2022, arXiv:2307.1551
Approximate Inference via Fibrations of Statistical Games
We characterize a number of well known systems of approximate inference as
loss models: lax sections of 2-fibrations of statistical games, constructed by
attaching internally-defined loss functions to Bayesian lenses. Our examples
include the relative entropy, which constitutes a strict section, and whose
chain rule is formalized by the horizontal composition of the 2-fibration. In
order to capture this compositional structure, we first introduce the notion of
`copy-composition', alongside corresponding bicategories through which the
composition of copy-discard categories factorizes. These bicategories are a
variant of the construction, and so we additionally introduce
coparameterized Bayesian lenses, proving that coparameterized Bayesian updates
compose optically, as in the non-coparameterized case.Comment: Accepted as a proceedings paper at ACT 202
Typescript of Harriet Emma (Booth) Le Clere\u27s Remembrances of Father (Edmund Booth Deaf Pioneer and California Gold Miner)
https://scholarlycommons.pacific.edu/grcc/1046/thumbnail.jp
Composition pour retarder l'initiation tumorale de cellules cancereuses chez un mammifère à risque
La présente invention concerne une composition préventive antitumorale comprenant une quantité pharmaceutiquement efficace d\u27au moins un antagoniste du récepteur AT2 de l\u27angiotensine II pour son application comme médicament afin de prévenir le développement de cancers chez un mammifère à risque. La présente invention concerne également un procédé de prévention du développement de cancer chez un mammifère à risque, ainsi qu\u27un kit de prévention du développement de cancers
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