The phrase "focused subject" is correct and usable in written English.
It can be used to refer to the subject or topic that one is currently focusing on. For example, "The professor spent the beginning of the lecture discussing the focused subject of early 20th century American literature."
I also encourage upper level students to start earlier with tertiary sources, especially good, focused subject encyclopedias.
Justice Department regulations call for subpoenas for journalists' phone records to be undertaken as a last resort and narrowly focused, subject to the attorney general's personal signoff.
Other than descriptions of range and nesting records, only Stevenson et al. (1983) have made the Antillean Nighthawk a focused subject of research to date.
Specialized programs of study offer focused subject concentrations that allow you to develop a skill set within a specific area or discipline.
Expanded knowledge of the American experience and exposure to focused subject areas, such as the poetry of Emily Dickinson, the twentieth-century century American novel, and the literary works of the Civil War.
Leverage your knowledge of focused subject areas such as environmental economics, greenhouse emissions management, sustainable building design, sustainable supply chain management, environmental toxicology, or risk management to achieve a specific objective.
In addition, they tend to develop extensive knowledge of narrowly focused subjects.
This is not the same camera as on the iPhone XR which offers portrait effects with sharply focused subjects and delightfully blurred backgrounds.
Presenting target objects on contextual landscape scenes, we introduced a cueing technique designed to focus subjects' attention on target processing.
This task was designed to focus subjects' attention on the surrounding Gabors.
Our study focused on subjects with a single episode of moderate to severe bTBI.
