PRELIMINARY DESIGN OF A KNEE EXTERNAL FIXATOR BASED ON PLANAR GEOMETRIC SYNTHESIS
Bibliographic record
Abstract
The paper presents the validation of a methodology for the optimal synthesis of a planar mechanical system able to reproduce knee kinematics in a limited range of motion. Such a mechanism could be effectively used in the design and placement of a moving external fixator for the knee joint articulation in either post-traumatic and pathological treatment or rehabilitation. The purpose is to help patient’s recovery through a limited and occasional movement of the articulation without loading the injured area. In order to validate the actual method, knee kinematics is estimated by means of plane radiographs of the articular joint of an healthy volunteer at different flexion angles. Each of the lateral radiographs shows the relative tibia-femur motion in different configurations. The whole movement is reconstructed by interpolation, assuming a relative gliding law. Geometric synthesis, based on Burmester’s theory, is thus used to identify a set of compatible four-bar-linkages (f.b.l.), which reproduce the estimated rigid body motion.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".