4 research outputs found
Statistical Epistemic Logic
We introduce a modal logic for describing statistical knowledge, which we
call statistical epistemic logic. We propose a Kripke model dealing with
probability distributions and stochastic assignments, and show a stochastic
semantics for the logic. To our knowledge, this is the first semantics for
modal logic that can express the statistical knowledge dependent on
non-deterministic inputs and the statistical significance of observed results.
By using statistical epistemic logic, we express a notion of statistical
secrecy with a confidence level. We also show that this logic is useful to
formalize statistical hypothesis testing and differential privacy in a simple
and abstract manner
Towards Logical Specification of Statistical Machine Learning
We introduce a logical approach to formalizing statistical properties of
machine learning. Specifically, we propose a formal model for statistical
classification based on a Kripke model, and formalize various notions of
classification performance, robustness, and fairness of classifiers by using
epistemic logic. Then we show some relationships among properties of
classifiers and those between classification performance and robustness, which
suggests robustness-related properties that have not been formalized in the
literature as far as we know. To formalize fairness properties, we define a
notion of counterfactual knowledge and show techniques to formalize conditional
indistinguishability by using counterfactual epistemic operators. As far as we
know, this is the first work that uses logical formulas to express statistical
properties of machine learning, and that provides epistemic (resp.
counterfactually epistemic) views on robustness (resp. fairness) of
classifiers.Comment: SEFM'19 conference paper (full version with errors corrected
The sound effect: a study in radical sound design
This research project combines a theoretical intervention into sound ontology, with an empirical investigation into listening experience, in parallel with two technologically focused, research-led creative practice projects. The design follows an iterative cycle of research and creative practice that integrates theory, practice and empirical approaches. The research makes an initial contribution to the field of sound studies by re-appraising the work of pioneers in the fieldâPierre Schaeffer and R. Murray Schaferâin light of the concept of the sonic effect. This concept is developed as an effective tool for both sound studies and sound design. This theoretical work attempts to critically and creatively examine the ontology or mode of existence of sonic phenomena and is informed by the post-structural theory of the effect. The theory of the sonic effect is empirically investigated by examining verbal accounts of listening experience elicited by semi-structured interview. Finally, having deconstructed sonic phenomena in terms of their potential to be actualised in diverse contexts, sonic effects are interrogated as a creative strategy in the field of sound design for performance and installed sonic art. Two projects are documented. One is a hybrid live performance installation utilising a novel software design for sound composition and projection. The other is a sound installation work demonstrating a novel loudspeaker design for the creation of very dense sound fields. In this context, design occurs as an effect at the intersection of new technologies of sound production and the production of audible sense. This approach enacts a radical pragmatism that underlies the radical sound design strategy outlined in the thesis