"by a specific time" is correct and can be used in written English.
It is typically used to indicate a deadline or time limit by which something needs to be completed or achieved. Example: Please submit your report by 5 pm on Friday.
These include saving money by a specific time or learn more on another channel like online, mobile, or print.
The public transport here is appalling, with buses late or even cancelled & extortionately expensive fares put people off using them, especially if they need to be in a place by a specific time.
The Semester at Sea program allows students to enjoy "in-port" time, giving them the opportunity to explore the country as long as they return by a specific time.
Know that you are moving unwaveringly in one clear direction and that this direction is right for you, but never get wrapped up in a particular result or achieving a certain goal by a specific time.
In such early larvae the Op usually has the form of a small linear 'spur' (Figure 1A), and at this stage we can recognize it only by its early time of formation and by its location, for neighboring craniofacial dermal bones also arise as linear spurs, each characterized by a specific time of appearance, location, and orientation (data not shown).
Autocorrelation describes the similarity of observations separated by a specific time span (the lag) in terms of a standard Pearson product moment correlation coefficient.
TIGRA ensures that no interference occurs and spatial channel reuse is maximized by assigning a specific time slot for each node.
Research has suggested that the key to making a habit stick may be to make it automatic, which you can easily do by creating a specific time slot for the activity every day or however often you plan to do it.
By targeting a specific time frame, the intervention can be tailored to needs and stressors associated with this particular initial time period after diagnosis.
(CSP56, Rural non-Aboriginal participant) CSPs operated by allocating a specific time for each patient in advance, and "that doesn't always meet people's needs" (CSP14, rural non-Aboriginal participant).
In essence, amyloid PET scans can be acquired by monitoring the time course of the radiotracer distribution during the entire scan after injection into the camera (that is, dynamic scanning) or by selecting a specific time interval (for example, between 60 and 90 minutes) after injection (that is, static scanning).
