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low riskAn estimate, separate from the seat reading.
Read October 16, 2026 at 1:12 PM PDT. Seat counts can change before you enroll.
BIOENGR M209 / RUAN, DAN
Signal and Image Processing for Biomedicine
How BIOENGR M209 grades when RUAN, DAN teaches it. BIOENGR M209, every instructor RUAN, DAN, every course
Grades, this instructor
3.93adjusted historical GPA, this instructor
77 letter grades across 4 terms, Fall 2022 to Fall 2025. The course pools every instructor at 3.94 over 77 letter grades.
- Raw average
- 3.94
- The mean of this instructor's recorded letter grades in this course.
- In the A range
- 97.4%
- A+, A and A minus out of 77 letter grades.
- D, F or W
- 0%
- D-range and F grades plus withdrawals, divided by letter grades plus withdrawals.
- Taken pass/no pass
- 0%
- No pass/no-pass outcomes are recorded.
Grade distribution
- A+25 / 32.5%
- A40 / 51.9%
- A-10 / 13%
- B+2 / 2.6%
- B0 / 0%
- B-0 / 0%
- C+0 / 0%
- C0 / 0%
- C-0 / 0%
- D+0 / 0%
- D0 / 0%
- D-0 / 0%
- F0 / 0%
Percentages are of the 77 letter grades. Grey bars are non-letter outcomes. They are excluded from GPA.
Term by term
Raw averages for the terms in this record. A missing term does not establish that this instructor did not teach it. Summer sessions are included when present.
Dashed line: course average across all instructors, 3.94.
One recorded instructorCo-taught, grades shared
Fall 20223.9426 letter grades.
Fall 20234.0016 letter grades.
Fall 20243.9518 letter grades.
Fall 20253.8917 letter grades.
Is one term a guide to the next?
Across the measured corpus, the same course and instructor's term averages were strongly correlated, including terms several years apart. That is why the adjustment does not weight recent terms more heavily. This is a dataset-wide pattern, not a promise about this instructor's next class.
Teaching it in Fall 2026
Reading these figures
Raw is the mean of the recorded letter grades. The adjusted historical GPA pulls an instructor's average toward the course's adjusted average, which itself uses a department prior. It is a comparison aid, not a calibrated prediction or a student rating. Small samples carry more uncertainty. All recorded instructor roles are included, and a section is counted only once for this instructor. Grades cannot establish workload or explain why outcomes differed.
What students say
dibs measures outcomes. For students' experiences of the class, BruinWalk has reviews.
Reviews for RUAN, DAN in BIOENGR M209