TEACHING EXAMPLE · NOT A STUDENT OUTCOME
This case illustrates how Dr. Li develops project-design judgment. It is a teaching example, not a real student record, experimental result, or competition outcome.
FOUR ROUNDS OF REFINEMENT
STARTING IDEA
The direction is meaningful but too broad. The material, mechanism, and evaluation criteria are undefined, and the work could quickly require cell or animal studies beyond the student's current resources.
ROUND 1 · NARROW
The question is now researchable but remains close to a routine formulation comparison. The next step is to identify a more meaningful observation window and explain why it matters.
ROUND 2 · STRENGTHEN
An original angle has emerged, but the material system, frequency rationale, controls, and decision criteria must still be defined.
FINAL DESIGN BLUEPRINT
The question, material, variable, observation window, and potential original contribution are now aligned for feasibility testing. This remains a project-design outcome, not an experimental result.
THE FINAL OUTPUT
The elements below describe the research plan, not data already obtained.
An injectable hydrogel formed from 4-arm PEG-aldehyde and carboxymethyl chitosan
Vary crosslinking ratio while holding total concentration, temperature, volume, and electrode geometry constant
Use impedance as a non-destructive observation window for the gelation process rather than only comparing endpoints
A no-crosslinker condition, fixed ionic strength, standardized timing, and a replication plan
Electrode polarization, temperature drift, ionic strength, and geometry may be mistaken for crosslinking effects
Screen a limited frequency range to validate the observation window before fixing 1 kHz
WHAT FAMILIES AND COUNSELORS CAN OBSERVE
EXISTING PROJECT DIAGNOSTIC