{"closest_prior_art":[{"name":"Field Health Systems turf testing and analytics service","overlap":"Commercial service combines rotational-resistance measurements at multiple field locations, traction-uniformity and high-risk-zone identification, grid-based infill-depth measurements, maintenance flags for grooming or top-dressing, longitudinal trending, and inspection of seams and drainage.","remaining_difference":"The page does not disclose a predeclared fixed-cell traction-tail rule based on direction-balanced repeats, retention of an area-weighted conforming mean, or mandatory treated-cell and adjacent-cell mechanical retesting before reopening.","source_ids":["SRC4"]},{"name":"Fleming, Watts, and Forrester 3G-turf degradation and maintenance studies","overlap":"Research uses repeated rotational-traction measurements at several pitch locations, quantifies pre/post grooming and decompaction effects, documents dense spatial infill sampling, and describes top-up targeted to areas identified by infill-depth measurements.","remaining_difference":"The reported interventions are generally pitch-level maintenance studies or infill-depth-directed treatment, not a cellwise workflow in which confirmed traction tails beneath a valid fieldwide mean trigger the least-extensive local repair and neighboring-cell retesting.","source_ids":["SRC3"]},{"name":"Veith et al. within-field surface-variability study","overlap":"Primary research directly states that fieldwide averages may not represent localized conditions and measures within-field hardness, rotational resistance, and infill-depth variation on synthetic fields alongside athlete mechanical loading.","remaining_difference":"It characterizes variability and athlete response rather than testing whether repeated traction-tail confirmation followed by cell-targeted treatment corrects outliers without degrading adjacent cells or the fieldwide indicator.","source_ids":["SRC2"]}],"contrastive_claim_falsifier":"The contrastive claim would be falsified if a reproducible search or field audit shows that current certification or maintenance practice already uses fixed-cell, direction-balanced repeated traction thresholds to trigger cell-specific approved repair and treated-plus-adjacent-cell retesting while retaining a fieldwide weighted mean, or if the proposed pilot finds no persistent traction tails or no repeatable local-treatment effect beyond tester uncertainty.","contrastive_claim_remaining":"Beyond existing multi-location testing, spatial characterization, and maintenance practice, a predeclared fixed-cell workflow may distinguish persistent rotational-traction tails from measurement scatter, direct the least-extensive approved physical repair only to confirmed cells, and verify the cell, its neighbors, and the still-valid fieldwide mean before reopening.","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","gates":{"adequate_source_search":{"rationale":"The bounded search covered direct intervention language, spatial-variability and historical terminology, current testing and maintenance services, governing-body methods, and combinations of traction measurement, infill migration, decompaction, mapping, and local repair. Four opened sources span four publishers and include official guidance, two primary studies, and a first-party service.","source_ids":["SRC1","SRC2","SRC3","SRC4"],"status":"PASS"},"bounded_next_test":{"rationale":"A closed 24-cell randomized repeated-measurement pilot is operationally bounded. Published work demonstrates repeated location-level traction testing and measurable pre/post decompaction changes, while the commercial service demonstrates that multi-location traction and grid-based infill measurements are practicable. The pilot can estimate repeatability, tail persistence, treatment response, and adjacent-cell effects without athlete exposure.","source_ids":["SRC3","SRC4"],"status":"PASS"},"distinct_testable_claim":{"rationale":"Although all major components have adjacent precedents, the retained sources do not disclose the complete contrast: preserve a valid fieldwide mean while repeated direction-balanced cell-level traction tails—not isolated readings or infill depth alone—trigger local treatment followed by cell, neighbor, and fieldwide retesting. That incremental workflow has explicit empirical falsifiers.","source_ids":["SRC2","SRC3","SRC4"],"status":"PASS"},"no_obvious_safety_or_authority_stop":{"rationale":"The authorized step is confined to calibrated mechanical testing and approved maintenance on a closed, unoccupied field. Governing-body guidance recognizes mechanical surface-performance testing, and the maintenance literature documents grooming, decompaction, redistribution, and infill top-up. Manufacturer approval, facilities control, safety-official reopening authority, inspection, and rollback remain required.","source_ids":["SRC1","SRC3"],"status":"PASS"},"supported_problem":{"rationale":"Primary evidence shows spatial variation in synthetic-field hardness, infill depth, and rotational resistance; explicitly warns that fieldwide averages may not represent local conditions; and associates localized surface differences with athlete mechanical loading. Dense infill surveys and observed maintenance effects further support heterogeneous degradation. The exact conjunction of a conforming traction mean with consequential persistent traction-tail cells is not directly demonstrated, so support is partial.","source_ids":["SRC2","SRC3"],"status":"PASS"}},"prior_art_disposition":"ADJACENT_PRIOR_ART","problem_evidence":{"finding":"Within-field mechanical heterogeneity on synthetic turf is visible: measured hardness, infill depth, and rotational resistance vary by location, traffic and maintenance affect infill state, and localized surface differences can correspond to different athlete loading. Existing evidence does not directly establish that a field passing on its area-weighted mean contains persistent safety-relevant rotational-traction tails, so the proposal's exact problem remains only partly supported.","source_ids":["SRC2","SRC3","SRC4"],"status":"PARTLY_SUPPORTED"},"research_id":"eoa_inverse_innovation_exp13_light_screen_20260806","schema_version":1,"screen_id":"E13P010","screen_survival":true,"search_lanes":{"component_combination":{"no_result_note":null,"queries":["synthetic turf spatial variation rotational traction grid maintenance local infill compaction","artificial turf spatial variability rotational traction maintenance locations study","\"rotational traction\" \"heat map\" artificial turf"],"source_ids":["SRC2","SRC3","SRC4"]},"direct_problem_and_intervention":{"no_result_note":null,"queries":["synthetic turf spatial variation rotational traction grid maintenance local infill compaction","synthetic sports surface traction mapping local repair portable rotational traction tester","artificial turf \"traction uniformity\" local maintenance testing heatmap"],"source_ids":["SRC2","SRC4"]},"products_practices_and_standards":{"no_result_note":null,"queries":["artificial turf rotational resistance test multiple locations maintenance decompaction infill FIFA","ASTM synthetic turf rotational traction test field locations uniformity","site:fifa.com football turf test manual field test positions rotational resistance 2026 PDF"],"source_ids":["SRC1","SRC3","SRC4"]},"synonyms_and_historical_terms":{"no_result_note":null,"queries":["artificial turf spatial variability rotational traction maintenance locations study","synthetic turf \"traction uniformity\" local maintenance testing heatmap","synthetic sports surface rotational resistance infill top-up decompaction spatial characterisation"],"source_ids":["SRC2","SRC3"]}},"sources":[{"claims_supported":["FIFA uses mechanical testing to evaluate artificial playing surfaces and has introduced a rotational traction athlete apparatus measuring shear stiffness, torque at 10 degrees, and peak torque.","FIFA certification evaluates safety and performance but does not itself disclose the proposal's dense cell-targeted repair workflow."],"publisher":"FIFA","source_id":"SRC1","source_type":"OFFICIAL_GUIDANCE","title":"New edition of FIFA Test Manual for Football Turf released","url":"https://football-technology.fifa.com/innovation/standards/football-turf/new-edition-of-fifa-test-manual"},{"claims_supported":["Synthetic fields exhibited within-field differences in hardness, rotational resistance, and infill depth.","The authors state that fieldwide averages may not represent localized conditions and report associations between localized surface hardness and lower-limb mechanical loading.","The study does not establish injury thresholds or causal injury relationships."],"publisher":"Frontiers Media","source_id":"SRC2","source_type":"PRIMARY_RESEARCH","title":"Within- and between-field variability in natural turfgrass and synthetic turf is associated with differences in athlete mechanical loading and perception","url":"https://www.frontiersin.org/journals/sports-and-active-living/articles/10.3389/fspor.2026.1876412/full"},{"claims_supported":["Research tested rotational traction repeatedly at five or six pitch locations and compared performance before and after maintenance.","Powerbrushing with decompaction reduced rotational resistance by about 10 percent on average in the reported study.","Infill depth was measured at 79–119 locations, and added infill could target specific areas identified from depth measurements.","The paper documents grooming, decompaction, redistribution, and infill top-up as existing maintenance practices."],"publisher":"SAGE Publications","source_id":"SRC3","source_type":"PRIMARY_RESEARCH","title":"A new model of third generation artificial turf degradation, maintenance interventions and benefits","url":"https://journals.sagepub.com/doi/10.1177/1754337120961602"},{"claims_supported":["The first-party service advertises rotational-resistance testing at multiple locations, traction-uniformity assessment, and identification of high-risk zones.","It advertises grid-based infill-depth measurement and identification of low-fill zones requiring grooming or top-dressing.","It also tracks results over time and inspects seams and drainage."],"publisher":"Field Health Systems","source_id":"SRC4","source_type":"FIRST_PARTY_PRODUCT","title":"Artificial Turf Field Maintenance & Testing | Professional Sports Field Analytics","url":"https://www.fieldhealthsystems.com/services/turf-testing"}],"world_novelty_boundary":"This bounded four-source public-web screen found adjacent research, official testing infrastructure, maintenance practices, and a commercial service covering most components, but no opened source disclosed the complete claimed workflow. That phrase-level absence cannot establish world novelty, patentability, market size, expert acceptance, or realized safety or operational value."}