In this study, our objective was to explore the impact of hearing loss on the conceptual system underlying word meaning. We collected perceptual strength norms for 200 Italian words from early deaf individuals with limited or no access to auditory information and compared them to existing norms from hearing individuals. For each word, participants provided perceptual strength ratings for each perceptual modality. Our results revealed a significant reduction of the auditory modality in the norms provided by deaf individuals compared to the hearing population. However, we did not observe an overall decrease in reported perceptual strength. Interestingly, we found a heightened involvement of other sensory modalities accompanied by reduced modality exclusivity in the conceptualization of words, indicating that deaf individuals heavily rely on information coming from the other perceptual modalities to form concepts. These findings suggest that hearing loss leads to a reorganisation of word conceptualization, characterised by increased multisensoriality. Importantly, although diminished, the auditory modality remains present, suggesting that deaf individuals can still infer auditory-associated knowledge about words to some extent.

We consider De Finetti’s control problem for absolutely continuous strategies with control rates bounded by a concave function and prove that a generalized mean-reverting strategy is optimal in a Brownian model. In order to solve this problem, we need to deal with a nonlinear Ornstein–Uhlenbeck process. Despite the level of generality of the bound imposed on the rate, an explicit expression for the value function is obtained up to the evaluation of two functions. This optimal control problem has, as special cases, those solved in Jeanblanc-Picqué and Shiryaev (1995) and Renaud and Simard (2021) when the control rate is bounded by a constant and a linear function, respectively.

Salmonella is a leading cause of bacterial foodborne illness. We report the collaborative investigative efforts of US and Canadian public health officials during the 2013–2014 international outbreak of multiple Salmonella serotype infections linked to sprouted chia seed powder. The investigation included open-ended interviews of ill persons, traceback, product testing, facility inspections, and trace forward. Ninety-four persons infected with outbreak strains from 16 states and four provinces were identified; 21% were hospitalized and none died. Fifty-four (96%) of 56 persons who consumed chia seed powder, reported 13 different brands that traced back to a single Canadian firm, distributed by four US and eight Canadian companies. Laboratory testing yielded outbreak strains from leftover and intact product. Contaminated product was recalled. Although chia seed powder is a novel outbreak vehicle, sprouted seeds are recognized as an important cause of foodborne illness; firms should follow available guidance to reduce the risk of bacterial contamination during sprouting.

Sporadic community-acquired legionellosis (SCAL) can be acquired through contaminated aerosols from residential potable water. Electricity-dependent hot-water tanks are widely used in the province of Quebec (Canada) and have been shown to be frequently contaminated with Legionella spp. We prospectively investigated the homes of culture-proven SCAL patients from Quebec in order to establish the proportion of patients whose domestic potable hot-water system was contaminated with the same Legionella isolate that caused their pneumonia. Water samples were collected in each patient's home. Environmental and clinical isolates were compared using pulsed-field gel electrophoresis. Thirty-six patients were enrolled into the study. Legionella was recovered in 12/36 (33%) homes. The residential and clinical isolates were found to be microbiologically related in 5/36 (14%) patients. Contaminated electricity-heated domestic hot-water systems contribute to the acquisition of SCAL. The proportion is similar to previous reports, but may be underestimated.

This bibliographical listing of Christopher Dawson's works was compiled as the preliminary step to a doctoral dissertation which dealt with his representation of the Middle Ages and was presented at the Institut d'études médiévales of the Université de Montréal. One of the last representatives of a school of thought that has enjoyed a very wide audience, especially because of its interpretation of the Middle Ages and of its attitude towards the modern world, Dawson not only deserves an effort such as this but in fact calls for it if, indeed, the intricate workings of this very typical mind are ever to be delved into.