Mr. Buck on Night Watching

Nightmares and Starscapes: Nightmare Frequency and Night-Sky Watching

N have been defined as “very disturbing dreams involving any unpleasant emotion” (1). Although often considered a childhood condition, a substantial percentage of participants in nonclinical adult samples have reported nightmares. For example, the number of nonclinical, adult participants who have reported experiencing nightmares at least once a month ranged from 8.3% (2) to 52.2% (3). Nightmar...

Integrated Buck-Buck-Boost AC/DC Converter

Single-Stage transformerless AC/DC converter received much attention in the universal line application. Unlike the existing converters a new high step-down transformerless single-stage single-switch AC/DC converter is proposed. The topology integrates a buck-buck-boost converter with low intermediate bus and output voltage. The converter utilizes a buck converter as a PFC cell and buck-boost co...

On Divali Night

On the robust linear control of the "buck-buck" converter: An active disturbance rejection approach

In this article, the cascade connection of two “buck” converters is examined from the perspective of differential flatness and Generalized Proportional Integral (GPI) observer–based control. The multi-variable nonlinear “buckbuck” converter is subject to unknown, time-varying, load current demands, at each one of the outputs of the two constitutive stages. The linear output feedback controllers...

Night sweats

Although night sweating is a common outpatient complaint medical, literature on this subject is scarce. Tuberculosis, brucellosis and lymphoma are diseases in which night sweating is a dominant symptom, but these are infrequently found to be the cause of night sweats in modern practice. While these diseases remain important diagnostic considerations in patients with night sweats, other diagnosi...