The phrase "active at one time" is correct and usable in written English.
It can be used to describe a state or condition where something was functioning or in effect during a specific period.
Example: "The software was active at one time, but it has since been replaced by a newer version."
Alternatives: "operational at a certain time" or "functioning during a specific period".
Staff at the research companies Nielsen and Frost & Sullivan told me that "smartphone penetration" refers to the share of mobile phone owners who own a smartphone--not the share of total mobile phone subscriptions active at one time.
"You maybe have 50,000 SKUs active at one time, for example; it's probably 1,000 or 2,000 that do most of your business — and probably 100 or 200 that do the vast amount of your business," Mauchline said.
In an appropriate buffer, organic fluorophores can bleach reversibly ("blinking"), which allows a small, random proportion of the fluors in a field to be active at one time.
Trypanosomes possess several hundreds of VSG genes scattered throughout their genome but these can only be expressed from one of ~20 expression sites, with only a single site being active at one time [ 19].
On the one hand, considering that there might be fewer than 30,000 human genes [ 25], and assuming that 50% of all genes are transcriptionally active at one time in a given tissue [ 26], it is possible that around 20% of the genes that are expressed in skeletal muscle are found on our microarray [ 25, 27].
Although only a small percentage of neurons were active at one time, every odor stimulated a unique subset of receptors.
Though most pianists tackle at least a good number of Beethoven's 32 sonatas, not many have all these diverse, challenging and extraordinary works in their active repertory at one time.
Currently, it has about 120 employees and has, since its inception, helped develop thousands of public service announcements, maintaining 35 to 40 active campaigns at one time, Ms. Sherman said.
Since the making of each documentary program involves the filming of dozens or scores of scenes, at spots that may be far apart — and are sometimes continents apart — the sheer logistic work necessary to keep half a dozen documentaries in active production at one time is something like the job of keeping a small but perpetual Berlin airlift going.
A new technology for peat production, called biomass dryer, has been developed by Vapo Ltd. and VTT Technical Research Centre of Finland, in which only a small part of the peatland area is in active production at one time (Kirkinen and others 2007a).
*These are the numbers of real time active users on site at one time!
