The phrase "observation day" is correctly formed and usable in written English.
It can be used to refer to a designated day in which something is observed, such as a special event or certain behaviors. For example, "The school has declared May 22nd as an observation day to celebrate the graduating seniors."
During 8 observation days (with time delay of 10 14 days between each observation day), all adult patients hospitalized at an internal medicine ward of 4 Belgian participating hospitals were screened for AB use.
Each park identified using the GIS was assigned a unique identification number and indicated on maps provided to observers on the observation day.
The QDCs are calculated every 1 s as the 70th percentile of the 1984 (= 64 Hz × 31 days) data points of the riometer output voltages (Vout) for ± 15 days of the observation day.
Note that all of the results for the external covariate should be interpreted conditionally on what happened two days before the observation day.
A local supervisor randomly visited the observers several times per observation day to make sure that the observations were accurate and standardized.
All the goats appeared to have a regular use of the enclosure and all goats were observed to be outside every observation day.
PCT and CRP plasma concentrations, the SOFA score [ 12] and the APACHE II score [ 13] were determined daily on observation day 1 to 5, and on days 8 and 15 after onset of symptoms of SIRS or sepsis.
Each observation day includes a half hour break for the observer, meaning that residents are observed for four hours each observation day.
Every 20 min a maximum of eight residents are observed in a random order leading to 12 observations per resident each observation day.
Solid circles show average SO2 flux of the observation day.
Fig. 3 The auroral electrojet (AE) index for each observation day of the campaign period.
