On the alert

Definitions

  • Webster's Revised Unabridged Dictionary
    • On the alert on the lookout or watch against attack or danger; ready to act.
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Usage

In literature:

So they walked along in detached groups, many eyes were on the alert, and listening ears bent to catch some sign of a lurking foe.
"The Banner Boy Scouts" by George A. Warren
Here he found all on the alert.
"The Lion of Saint Mark" by G. A. Henty
Satan is ever on the alert, to observe the bent of the mind, and carry it to extremes.
"A Practical Directory for Young Christian Females" by Harvey Newcomb
He had kept his eyes ever on the alert, and yet he had not found her.
"Phineas Finn" by Anthony Trollope
No other garrison, when once on the alert, was needed for such an enemy.
"Tales of Destiny" by Edmund Mitchell
In an instant Jack was on the alert.
"Jack Haydon's Quest" by John Finnemore
He was on the alert for the fellow, or for his ally, Bill Tozer.
"Two Boys in Wyoming" by Edward S. Ellis
They are always on the alert to take the ideas of other concerns.
"The Moving Picture Girls at Rocky Ranch" by Laura Lee Hope
Cynthia was alert at once, but the light that shone on the old face revealed an expression which had not rested there for many a day.
"A Son of the Hills" by Harriet T. Comstock
When the nerve centers of his shrewdness were stimulated his indolence lapsed and he was very much on the alert.
"Campfire Girls at Twin Lakes" by Stella M. Francis
Max was on the alert.
"Afloat on the Flood" by Lawrence J. Leslie
Kept on the alert by Mr Tidey's warnings, I continued racing up and down the portion of the camp which had been allotted to me to guard.
"With Axe and Rifle" by W.H.G. Kingston
They also had heard the sounds, and were on the alert.
"The Frontier Fort" by W. H. G. Kingston
The enemy were ever on the alert, endeavouring to find some means of destroying us.
"Hurricane Hurry" by W.H.G. Kingston
Alick and I were continually going our rounds, to see that all the men were on the alert.
"Snow Shoes and Canoes" by William H. G. Kingston
The garrison was kept constantly on the alert.
"The Trapper's Son" by W.H.G. Kingston
I shall sleep and rest, and yet be always on the alert to keep up the fire and hear any sound that comes near.
"The Man of the Desert" by Grace Livingston Hill
Suspecting, however, they were close behind him, the boys held their places, the foremost still on the alert for the criminals.
"Klondike Nuggets" by E. S. Ellis
As a result, the Indian murderers on reaching there found the gates closed and the inhabitants on the alert.
"Historical Tales, Vol. 2 (of 15)" by Charles Morris
Evidently the guerillas were on the alert.
"An Undivided Union" by Oliver Optic
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In poetry:

Onward be stepp'd, the boy alert,
Calling his courage forth,
Hung like a log on Andrew's skirt,
And down he brought them both.
"The Drunken Father" by Robert Bloomfield
Our people one! Nor they with strength
Dependent on a single arm:
Alert, and braced the whole land's length,
Rejoicing in their manhood's charm
For friend or foe; to succour, not to harm.
"The Call" by George Meredith
The heroes return’d from the well-foughten field,
And bore home Sir Frovin’s corse, laid on a shield;
Sad sight for the maid! but she still was alert,
And sew’d round the body the funeral shirt:
"May Asda (From The Danish Of Oehlenslaeger)" by George Borrow
but would not charge, being willing not to die.
The rabbit's case, a little different,
consisted in alert
& wily looks down the lawn, where nobody was,
with prickt ears, while rapt but chatting on the porch
we sat in view nearby.
"Dream Song 62: That dark brown rabbit, lightness in his ears" by John Berryman
A young man goes skipping and bounding along a street in the capital. His
movements are gay and alert; there is a sparkle in his eyes, a smirk on his
lips, a pleasing flush on his beaming face…. He is all contentment and
delight.
"A Contented Man" by Ivan Turgenev
For, as on the alert, O steersman, you mind the bell's admonition,
The bows turn,—the freighted ship, tacking, speeds away under her
gray sails,
The beautiful and noble ship, with all her precious wealth, speeds
away gaily and safe.
"Aboard At A Ship's Helm" by Walt Whitman

In news:

Wyoming County Sheriffs were called to the Betrand Chaffee Hospital in Springville, NY after they were alerted about a 13-year-old girl being treated for alcohol poisoning on October 5th, 2012.
According to officials on scene, one of the garage owners, Krystal Renken, was alerted by a neighbor that the garage was on fire.
Smog alerts are in effect all over Ohio because of the kind of hot, stifling air that holds on to pollution.
ASHLAND — Today is American Diabetes Association Alert Day, a day on which the ADA asks people to become aware of the signs of diabetes and the risk factors.
Alert HoopIdea to super flops with the Twitter hashtag #FlopOfTheNight (follow us on Twitter here).
Members of the community are on alert after a drive-by shooting on 60th Avenue on Wednesday night.
What should a member of the public do when he or she receives one of those new Wireless Emergency Alerts on a cellphone.
Marshall residents have been on high alert the last couple of months thanks to a spike in a burglaries - in a small town, it doesn't take much to reach "crime spree" level.
Soldiers of the Pakistan army are on alert in the troubled Pakistani tribal area of Miran Shah in North Waziristan along the Afghanistan border, in 2007.
Consider the direct response industry on alert.
Firefighters remain on alert throughout the South Coast, as Santa Ana winds conditions continue to buffet the region.
He was later found behind Shoe Carnival, and employees of the store say the amount of patrol cars had them on alert.
Women are on alert and police are on the lookout on and near the N.C.
The Chinatown community is on alert after a new scam has swindled thousands of dollars worth of cash and jewelry from elderly women.
STORES Weekly e-newsletter is designed to alert readers to new stories available on STORES.org, the latest breaking retail news and interesting trends on STORESnews.org, product and service provider news and upcoming STORES and NRF events.
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In science:

One essential ingredient of this solution would be to alert subscribers to the various registration deadlines and to provide updates on the remaining number of available slots.
Challenges facing young astrophysicists
On completion of the application of one of the operations we again fetch the current time after which we calculate elapsed time in milliseconds and using a JavaScript’s Alert method we display it onto the screen.
Analysis of Using Browser-native Technology to Build Rich Internet Applications for Image Manipulation
The alert reader will also notice that coefficients appearing in the series of eq.(3) represent the Molien series for the finite group Z3 , acting on a three dimensional vector space with the generators (1, ω , ω 2), where ω = e2iπ/3 is a third root of unity.
Directed Random Walks on Colored, Periodic Lattices: A Gauge Theoretic Approach
Due to the bright limit of Gaia at V∼6 mag, only few Cepheids will be missed (in the Hipparcos catalogue we found 22 stars for which the maximum light is brighter than 6). A word on Supernovae: Gaia will have an alert system that will detect supernovae and other transient events.
Standard candles from the Gaia perspective
We review some tools that should be developed and also what can be gained from these missions on the sub ject of binaries and exoplanets from the astrometry, photometry, radial velocity and their alert systems.
The impact of Gaia and LSST on binary stars and exo-planets
LSST will issue alerts based on photometric and astrometric changes, and any transient event will be posted in less than 60 seconds (with a goal of 30 seconds) via web portals including the Virtual Observatory.
The impact of Gaia and LSST on binary stars and exo-planets
In 1930, Eddington, who was working with McVittie on possible dynamical solutions of the cosmological Einstein equations (following a discussion that he had with de Sitter during a meeting of the Royal Astronomical Society ), was alerted by Lemaˆıtre about his own results.
Models of universe with a polytropic equation of state: I. The early universe
The alert reader might wonder why these operators L and R are actually defined on H(Γ).
On a theorem of Livsic
Compared to a few years ago, a much larger role is being played by ground-based robotic optical follow-ups, due to the increased rate of several arc-second X-ray alerts from XRT, and the larger number of robotic telescopes brought on-line in the last years.
Gamma-Ray Bursts
Particularly, Consolvo and Walker describe how the alerts might be triggered using three modalities: randomly, on specified schedule, and triggered by the participants when a self-reported event of interest occurs.
A Refined Experience Sampling Method to Capture Mobile User Experience
The detection of these photometric alerts will be performed on near-real-time Gaia broad-filter photometry.
From Hipparcos to Gaia
But, because the light curves will tend to exhibit structure on short time scales, more frequent observations after the alert would be fruitful.
Searching for Planets During Predicted Mesolensing Events: II. PLAN-IT: An Observing Program and its Application to VB 10
Mid-infrared spectroscopic measurements from the Infrared Spectrometer on S pitzer (IRS) are given for 125 hard X-ray AGN (14-195 keV) from the Sw if t Burst Alert Telescope sample and for 32 AGN with black hole masses from reverberation mapping.
Infrared Classification and Luminosities For Dusty AGN and the Most Luminous Quasars
The uniform sample of AGN in Tueller et al. (2010) discovered because of high energy X-rays in the all sky sample from the Burst Alert Telescope (BAT) on the Sw if t Small Explorer (Gehrels et al. 2004); 125 of these have IRS low resolution spectra.
Infrared Classification and Luminosities For Dusty AGN and the Most Luminous Quasars
In response to the alert from the Beppo-SAX Team, we observed the field containing the (then) ∼ 3 arcmin accurate position of GRB970228 with the Rome Astronomical Observatory’s 0.60 m Schmidt telescope at Campo Imperatore on Feb 28.8, Mar 4.8 and Mar 12.8 UT.
The Optical Transient of GRB970228, 16 hours after the burst
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