(Kiparsky 1971, 1973) draws attention to cases of historical change that suggest that at least some opaque phonological process interactions are difficult to learn. In his work on Stratal Optimality Theory (Stratal OT), he further claims that independent evidence about the stratal affiliation of a process is helpful in learning an opaque interaction (Kiparsky 2000). In this paper, we develop a ...

Opacity is a security property formalizing the absence of secret information leakage and we address in this paper the problem of synthesizing opaque systems. A secret predicate S over the runs of a system G is opaque to an external user having partial observability over G, if s/he can never infer from the observation of a run of G that the run belongs to S. We choose to control the observabilit...

One of the objectives of patent systems is to disclose information which other agents can build on in further inventions and in their decision-making. While some observers take it as given that real-world patent systems serve this objective, we argue in this article that patent systems are highly opaque and likely to be of limited value as a source of information. We use data from a natural exp...

Opaque traffic, i.e., traffic that is compressed or encrypted, incurs particularly high overhead for deep packet inspection engines and often yields little or no useful information. Our experiments indicate that an astonishing 89% of payload-carrying TCP packets — and 86% of bytes transmitted — are opaque, forcing us to consider the challenges this class of traffic presents for network security...

An opaque mutation was identified that reduces gamma-zein synthesis in maize endosperm. The mutation, opaque-15, causes a 2- to 3-fold reduction in gamma-zein mRNA and protein synthesis and reduces the proportion of the 27-kDa gamma-zein A gene transcript. Although the protein bodies in opaque-15 are similar in size and morphology compared to wild type, there are fewer of them in developing end...

This paper reports that the opaque and white phenotypes of Candida albicans constitute a true high-frequency reversible transition system. The rDNA restriction fragment and orthogonal field alternating gel electrophoresis profiles of opaque and white phenotypes are indistinguishable, and a genetic marker introduced into a white strain is present in all opaque derivatives of this strain. Opaque ...

Every year, fee awards enable millions of people to obtain access to justice and strengthen the deterrent effect of the law by motivating lawyers to handle class actions. But little research exists on why judges award the amounts they do or whether they size fee awards correctly. The process remains a black box. Through a detailed study of 431 securities class actions that settled in federal di...