The phrase "alert observers" is correct and usable in written English.
It can be used to describe individuals who are attentive and watchful, often in contexts related to monitoring or vigilance.
Example: "The alert observers quickly noticed the unusual behavior of the animals in the park."
Alternatives: "vigilant watchers" or "attentive spectators".
Alert observers were struck less by the criticism than by the implicit acknowledgment that, even in China, the economy has gone cold.
Alert observers were quick to note that the first minister was among the first to congratulate the Weirs, from Largs in Ayrshire, on their record win: he has reportedly called them several times since their win became public in July.
For example, patients with insidious-onset, deficit symptom ridden illnesses (with generally poorer prognoses) may be quietly psychotic for years before coming to therapeutic attention whereas good prognosis patients with sudden and visible positive symptom related alterations in behavior may alert observers and come to the attention of health providers and preferentially enter STEP.
During these exchanges the hunched, sobbing Mr Pistorius of the first day was replaced by an upright, alert observer.
However, for the quiet, alert observer, one of the treats that Big Morongo offers is the prospect of encountering a bobcat, especially at dusk or dawn.
Even after three-quarters of a century of breakneck re-development, the alert observer need not travel far to spot the tell-tale signs of bomb and rocket strikes.
He himself set up procedures for alerting observers, including amateurs, for whom he had a great respect and affection, to the discovery of anything in a vaguely worrying orbit, so that follow-up observations could rule out a collision as, thus far, they always have.Mr Marsden's other somewhat controversial stand was on Pluto, calling on the IAU to downgrade its planetary status.
Ultimately, the security operator's ability to act as an alert, motivated observer determines the effectiveness of the video system.
Historically, the process of transient luminous event (TLE) detection has required an alert human observer on a low light level television (LLTV) monitor, either in real time or playback.
Exactly how this will happen cannot be predicted, but 'securitization' and 'hegemony' are important sensitising concepts that can alert the observer to mechanisms of power re-distribution in other situations and settings.
Symptoms and signs are important as they alert the observer to the possibility that heart failure exists.
