BACKGROUND Online tools can be used by people with dementia and their caregivers to self-identify and track troubling symptoms, such as verbal repetition. We aimed to explore verbal repetition behaviors in people with dementia. METHODS Participants were recruited via an online resource for people with dementia and their caregivers. Respondents were instructed to complete information about sym...

We demonstrate optical frequency combs using the fluorite whispering gallery mode resonator as a nonlinear Kerr medium. Two regimes of generation are observed, giving the record low repetition rate of 13 GHz, equal to the cavity's free spectral range (FSR) or high repetition rates of multiples of cavity FSR. An intermediate regime was also observed. Raman lasing spectrum similar to modulation i...

There is considerable interest in fear appeal arguments in both the normative (logical) and the empirical (psychological) literature on argumentation. However, these two streams are, so far, relatively independent of each other. In this paper, an attempt is made to join them together, or at least to open up a canal between them.1 Fear appeal arguments are studied in logic under the category of ...

How does a background conversation affect a foreground conversation? In this scenario, and unlike traditional studies of noise-induced speech modification (Lombard speech), listeners have to cope with the additional challenge of competing speech material. In the current study, pairs of talkers engaged in natural dialogs in the absence or presence of another talker pair. Changes in speech level ...

This study examines modifications to the acoustic and affective qualities of infant-direct speech (IDS) from birth to 12 months. The acoustic analysis of fundamental frequency shows that IDS has the highest level of mean fundamental frequency (F0) in speech to infants at 6 months, and the highest level of pitch range in speech to infants at 12 months. Sex-based differences were evident with mot...

This report describes an ongoing investigation of 4-6 year-old children’s perception of synthetically modified versions of their own recorded speech. Recordings of the children’s speech production are automatically modified so that the initial consonant is replaced by a different consonant. The task for the children is to judge the phonological accuracy (correct vs. incorrect) and the speaker i...

Objective(s): The present study aimed to evaluate the capability of synthesized and modified superparamagnetic iron oxide nanoparticles (SPIONs) as the positive contrast agent in magnetic resonance imaging (MRI) by investigating the effect of repetition time (TR) on the MRI signal intensity. Materials and Methods: SPIONs were synthesized using the co-precipitation method, and their surfac...

We discuss our ongoing work with an agent-based password simulation which models how site-enforced password requirements affect aggregate security when people interact with multiple authentication systems. We model two password memorization techniques: passphrase generation and spaced repetition. Our simulation suggests system-generated passphrases lead to lower aggregate security across servic...