alertness

n.

警戒，机敏；戒心；

1. The other half of the brain stays awake at a low level of alertness.
   另一半大脑在低水平警戒状态下保持清醒。
2. They also increase alertness and energy.
   它们也能提高机敏性和精力。
3. Without Alertness I'll be stupid.
   没有机敏那是愚蠢。

Estimating alertness from the EEG power spectrum
Lapses in alertness: coherence of fluctuations in performance and EEG spectrum
Interactive mathematical models of subjective alertness and cognitive throughput in humans
High sensitivity of human melatonin, alertness, thermoregulation, and heart rate to short wavelength light.
The Psychological Basis of Opportunity Identification: Entrepreneurial Alertness
Validity and reliability of the Observer's Assessment of Alertness/Sedation Scale: study with intravenous midazolam
Neural basis of alertness and cognitive performance impairments during sleepiness II. Effects of 48 and 72 h of sleep deprivation on...
Neural basis of alertness and cognitive performance impairments during sleepiness. I. Effects of 24 h of sleep deprivation on waking...
Characteristics of opportunities search of entrepreneurs versus executives: Sources, interests, general alertness ☆
Dose-response relationship for light intensity and ocular and electroencephalographic correlates of human alertness.