Traditionally, psychiatry has been defined and practiced as a branch of medicine focused on the diagnosis and treatment of mental illnesses. Based on growing empirical evidence, we believe that this definition warrants expansion to include the concept of positive psychiatry. In the present article, we provide a critical overview of this emerging field and a select review of relevant scientific ...

In this issue of Neuron, Kraus et al. (2013) show that a population of "time cells" in the hippocampus responds to the passage of time rather than simply reflecting path integration. This study advances our understanding of how time is represented in the hippocampus.

This paper introduces and explores the new concept of Time-Specific Encryption (TSE). In (Plain) TSE, a Time Server broadcasts a key at the beginning of each time unit, a Time Instant Key (TIK). The sender of a message can specify any time interval during the encryption process; the receiver can decrypt to recover the message only if it has a TIK that corresponds to a time in that interval. We ...

Association of deep white matter infarction with chronic communicating hydrocephalus: implications regarding the possible origin of normal pressure hydrocephalus. Idiopathic normal pressure hydroceph-alus may be a " two hit " disease: benign external hydrocephalus in infancy followed by deep white matter ischemia in late adulthood. T he article in this month's American Journal of Neuroradi-olog...

Reflecting lung cancer screening’s potential for complexity, the article in this issue by Drs. Brawley and Flenaugh points out that there are so many different solitary nodules found on the low-dose helical computerized tomography (LDCT) used for lung cancer screening that algorithms are being developed to more effectively and accurately distinguish benign lesions from malignant ones. The major...