{"closest_prior_art":[{"name":"World Rowing seat-racing guidance","overlap":"Switches athletes between crew boats for direct comparison, recommends controlled starts and stroke rates, comparable equipment, repeat races, and fatigue limits.","remaining_difference":"It prohibits rigging changes during comparison, relies mainly on boat-level results, serves crew selection, and does not cross stroke occupant with rigging while tracing individual force, synchronization, and hull acceleration.","source_ids":["SRC1"]},{"name":"Peach PowerLine rowing telemetry","overlap":"Provides calibrated replacement oarlocks measuring individual force and angle, boat speed and motion, with optional seat-position sensors; it supports technique comparison and rig optimization in crew boats.","remaining_difference":"The product establishes measurement capability but not a counterbalanced occupant-by-rigging attribution protocol, blinded mechanism analysis, or a boundary against selection use.","source_ids":["SRC2"]},{"name":"Cuijpers et al. crew-synchronization study","overlap":"Directly measured crew oar-angle coordination and three-axis boat movement at multiple stroke rates, confirming that synchronization and hull motion are jointly measurable and not reducible to an aggregate split.","remaining_difference":"It studied double-scull coordination without individual oarlock-force attribution, stroke-occupant substitution, rigging crossover, or first-100-metre starts.","source_ids":["SRC3"]},{"name":"Held et al. randomized oarlock-axis crossover","overlap":"Randomized standard and modified oarlock configurations and measured technique and performance in indoor and in-field rowing, showing a bounded physical rigging intervention and athlete–configuration sensitivity.","remaining_difference":"It involved para-rowers rather than a fixed coxed-four crew and did not cross qualified stroke-seat occupants, measure distributed crew forces, or separate person, position, synchronization, and rigging effects.","source_ids":["SRC4"]}],"contrastive_claim_falsifier":"The claim would be falsified by a prior public protocol that already crosses focal and substitute stroke occupants with mechanically verified rigging packages in the same fixed coxed four, synchronizes individual force and seat phase with hull motion and 100-metre timing, and reports bounded non-selection attribution; it would also fail empirically if calibrated, counterbalanced trials cannot reproduce or discriminate occupant, coordination, or rigging pathways.","contrastive_claim_remaining":"Relative to seat racing, telemetry-based technique assessment, coordination studies, and single-athlete rigging crossovers, the proposal distinctly tests whether a directly measured stroke-occupant force-to-acceleration pathway persists across both qualified occupant substitution and a physical rigging crossover while retaining the continuing crew's synchronization as an explicit mediator and excluding selection judgments.","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","gates":{"adequate_source_search":{"rationale":"The bounded search covered the named intervention, seat-racing and historical gate/rowlock terminology, commercial telemetry and official practice, and combinations of substitution, synchronization, rigging, force, and acceleration. Four opened sources span four publishers and include official guidance, first-party product evidence, and primary research.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PASS"},"bounded_next_test":{"rationale":"Bench calibration followed by one counterbalanced pass through four occupant-by-rigging conditions is a finite feasibility test. Replacement instrumentation is commercially implemented, randomized rigging crossover is experimentally feasible, and official seat-racing guidance supports controlled starts, repeatability checks, and fatigue limits.","source_ids":["SRC1","SRC2","SRC4"],"status":"PASS"},"distinct_testable_claim":{"rationale":"The retained art separately establishes occupant switching, synchronized crew-motion measurement, comprehensive telemetry, and physical rigging crossover, but none reports their proposed 2-by-2 combination in a fixed coxed four with mechanism-level, non-selection attribution.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PASS"},"no_obvious_safety_or_authority_stop":{"rationale":"The authorized first step is athlete-free calibration. Later trials are voluntary, medically cleared, within certified rigging limits, and subject to water, equipment, pain, synchronization, and fatigue stops. Official guidance itself warns against fatigue and compromised equipment, while drop-in instrumentation and bounded rigging crossover have precedents. No retained source identifies a categorical stop, though local water-safety and equipment approval remain necessary.","source_ids":["SRC1","SRC2","SRC4"],"status":"PASS"},"supported_problem":{"rationale":"Official seat racing shows that occupant contribution is conventionally tested by swaps while holding rigging fixed; telemetry demonstrates that individual force, seat motion, boat motion, and rig optimization are relevant; primary studies show crew coordination affects measurable boat movement and that equipment configuration can alter technique or performance. These support the confounding structure, but not the proposal's particular hero-centered review episode.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PASS"}},"prior_art_disposition":"ADJACENT_PRIOR_ART","problem_evidence":{"finding":"The general attribution problem is visible: athlete substitution, crew synchronization, individual force production, hull motion, and rigging effects are established but usually evaluated in separate practices or studies. Evidence does not independently verify the proposal's specific focal-athlete narrative, so support is partial.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PARTLY_SUPPORTED"},"research_id":"eoa_inverse_innovation_exp13_light_screen_20260806","schema_version":1,"screen_id":"E13P144","screen_survival":true,"search_lanes":{"component_combination":{"no_result_note":"No retained source combined qualified stroke-seat substitution, a rigging crossover, synchronized individual force/seat/hull measurements, and bounded non-selection attribution; this bounded miss is not evidence of novelty.","queries":["rowing crew coordination stroke seat synchronization instrumented oarlock force acceleration study","rowing rigging crossover different inboard span same rowers on water experiment force oarlock","rowing occupant swap rigging crossover crew instrumentation force acceleration","rowing athlete substitution force curves crew boat study"],"source_ids":["SRC3","SRC4"]},"direct_problem_and_intervention":{"no_result_note":"Direct searches found the component methods but no retained exact 2-by-2 instrumented crew–rigging crossover in a fixed coxed four.","queries":["rowing stroke seat occupant substitution rigging crossover strain gauged oarlocks hull acceleration","rowing seat racing substitute rower same crew performance test stroke seat","rowing \"seat racing\" \"PowerLine\" instrumented oarlock","rowing \"crew selection\" instrumented oarlock force seat racing"],"source_ids":["SRC1","SRC2","SRC3","SRC4"]},"products_practices_and_standards":{"no_result_note":null,"queries":["site:peachinnovations.com rowing PowerLine oarlock force seat position boat acceleration crew","BioRowTel instrumented oarlock force boat acceleration crew rowing first party","World Rowing rules equipment oarlock instrumentation safety rowing boat","rowing crew selection instrumented oarlock force seat racing"],"source_ids":["SRC1","SRC2"]},"synonyms_and_historical_terms":{"no_result_note":null,"queries":["rowing \"rigging\" \"instrumented oarlock\" rowing experiment","rowing gearing ratio inboard oar length on-water performance experimental study instrumented oarlock","rowing seat racing substitute rower same crew performance test stroke seat","rowing crew rigging optimization span inboard force measurement on water study"],"source_ids":["SRC1","SRC2","SRC4"]}},"sources":[{"claims_supported":["Seat racing directly compares athletes by switching them between crews.","Guidance calls for comparable, properly rigged equipment, no rigging changes, controlled starts and rates, repeat checks, and limits on fatigue.","Seat racing can miss fast combinations and is conventionally framed as a selection tool."],"publisher":"World Rowing (FISA)","source_id":"SRC1","source_type":"OFFICIAL_GUIDANCE","title":"Section 9 – Crew Selection","url":"https://worldrowing.com/wp-content/uploads/2020/12/3Chapter9_English-1.pdf"},{"claims_supported":["PowerLine measures oarlock force and angle plus boat speed and motion.","Optional sensors include seat position and stretcher force, and systems scale to crew boats.","The system is marketed for individual power, matched technique, rig and equipment optimization, and selection support."],"publisher":"Peach Innovations Limited","source_id":"SRC2","source_type":"FIRST_PARTY_PRODUCT","title":"PowerLine Rowing Instrumentation and Telemetry","url":"https://www.peachinnovations.com/"},{"claims_supported":["Crew coordination and boat movements were measured synchronously using oar-angle sensors and a three-axis accelerometer-gyroscope.","Synchronization consistency and detrimental boat-motion assumptions cannot be inferred simply from stroke rate or aggregate performance."],"publisher":"Wiley","source_id":"SRC3","source_type":"PRIMARY_RESEARCH","title":"Rocking the boat: does perfect rowing crew synchronization reduce detrimental boat movements?","url":"https://pubmed.ncbi.nlm.nih.gov/27882632/"},{"claims_supported":["A randomized crossover compared standard and modified oarlock-axis configurations.","The study tested equipment-induced technique and performance changes in both controlled and in-field rowing conditions.","Configuration effects differed across measured outcomes and settings, supporting bounded rather than universal rigging claims."],"publisher":"Frontiers Media S.A.","source_id":"SRC4","source_type":"PRIMARY_RESEARCH","title":"Changing Oar Rotation Axis Position Increases Catch Angle During Indoor and In-Field Para-Rowing: A Randomized Crossover Trial Verified by a Repeated Measurement Trial","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC8904152/"}],"world_novelty_boundary":"This coarse public-web screen found adjacent prior art for every major component but no retained exact combination. It cannot establish world novelty, patentability, freedom to operate, market size, expert acceptance, ecological validity at championship intensity, or realized coaching value."}