{"abstention_reason":null,"arm":"SUBSTRATE_DIVERSE_P2","candidate_id":"deterioration_monitoring__library_information_science__SUBSTRATE_DIVERSE_P2","cell_id":"deterioration_monitoring__library_information_science","decision":"PROPOSAL","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","proposal":{"actors":["Audiovisual archivist responsible for identifying cellulose-acetate holdings","Collection conservator serving as accountable condition owner","Preservation manager responsible for storage priorities","Facilities staff responsible for cold-storage capacity and environmental safety","Occupational-safety officer consulted about concentrated off-gassing","Researchers and community users who depend on playable audiovisual records"],"affected_objective":"Preserve the physical playability and reformattability of cellulose-acetate audiovisual holdings by detecting autocatalytic chemical decay before severe shrinkage, brittleness, channeling, or emulsion loss occurs.","arm":"SUBSTRATE_DIVERSE_P2","authority_safety":{"authorized_first_step":"The collection conservator may bench-calibrate noncontact acid-reactive coupons in sealed surrogate chambers and place validated coupons in inert, vented holders inside 20 curator-confirmed cellulose-acetate enclosures already scheduled for inspection. Staff may compare and record coupon color under standardized illumination, but may not treat, discard, reformat, or relocate collection objects during the pilot.","decision_authority":"The conservator validates measurements and decides whether an item requires confirmatory examination; the preservation manager approves rehousing or movement; facilities staff approve cold-storage placement; hazardous or unidentified film is referred to the occupational-safety officer and appropriate specialist.","excluded_actions":["Do not place reactive material in direct contact with film, magnetic coatings, labels, photographs, or paper documentation.","Do not open nitrate film, unidentified film, visibly pressurized containers, or enclosures presenting an unknown chemical hazard under this pilot.","Do not use odor sniffing as an inspection method.","Do not infer intellectual, cultural, or retention value from chemical condition.","Do not discard, chemically treat, duplicate, freeze, or relocate an item automatically after a coupon changes color.","Do not expose restricted audiovisual content or alter descriptive metadata while recording physical condition."],"halt_rollback":"Halt if coupons shed material, stain enclosures, produce inconsistent readings against controls, require unsafe container opening, or reveal concentrated vapors beyond approved handling conditions. Remove coupon holders where safe, isolate affected pilot materials under conservator direction, suspend threshold decisions, and retain the prior storage and treatment status until specialist review."},"baseline":"Business as usual relies on periodic visual inspection, room-level temperature and humidity readings, or conspicuous odor and deformation. These practices can miss enclosure-specific acid accumulation and do not preserve a comparable time-integrated chemical signal showing which acetate objects are deteriorating or accelerating.","candidate_id":"deterioration_monitoring__library_information_science__SUBSTRATE_DIVERSE_P2","causal_chain":["Hydrolysis of cellulose acetate releases acetic acid within a film can, reel box, or other enclosure.","Retained acid promotes further hydrolysis, creating an autocatalytic deterioration cycle that can accelerate while the object still appears usable.","A noncontact coupon containing an acid-reactive colorant undergoes a persistent optical change proportional to cumulative acidic-vapor exposure in that enclosure.","Lot-matched blanks and standardized optical comparison distinguish enclosure exposure from coupon aging, illumination variation, and handling noise.","Coupon replacement and inspection at a cadence matched to observed change preserve direction, persistence, and acceleration for each monitored object.","Validated warning bands trigger confirmatory physical examination; unacceptable or rapidly accelerating readings trigger conservator review for isolation, cold storage, rehousing, duplication, or other approved preservation action.","Earlier separation or cooler storage reduces the chemical reaction rate and cross-exposure while the recording remains more likely to be safely handled and reformatted.","Post-response coupons test whether enclosure acidity stabilizes, while false alarms and missed physical damage recalibrate coupon chemistry, bands, and cadence."],"cell_id":"deterioration_monitoring__library_information_science","consequence":"Undetected acetate decay can progress from modest off-gassing to irreversible shrinkage, brittleness, distortion, image or sound-layer damage, unsafe handling, loss of playback, and more expensive emergency duplication. Acid released by one object may also worsen conditions within a shared enclosure.","diversity_from_prior_proposals":"The sealed P1 monitors metadata-mediated retrievability through repeated digital query tests and routes failures to metadata or indexing repair. This proposal instead monitors molecular deterioration of physical audiovisual carriers through chemical-to-optical transduction and routes threshold crossings to conservation, isolation, cold-storage, rehousing, or reformatting decisions. The affected condition, sensing intervention, response pathway, and causal chain are materially independent of P1.","experiment_id":"eoa_inverse_innovation_exp13_second_slot_policy60_20260806","intervention":"Install a noncontact Acid-Off-Gassing Sentinel for selected cellulose-acetate audiovisual holdings. Each monitored enclosure receives a replaceable acid-reactive colorimetric coupon held in an inert, vented sleeve that prevents contact with the object. A lot-matched unexposed coupon serves as a control. At a conservator-set cadence, staff compare each coupon with a physically calibrated color scale under standardized illumination and, where ambiguity matters, measure reflectance with a handheld colorimeter. A paper or electronic condition record retains coupon lot, exposure duration, optical band, enclosure temperature and humidity, visible physical signs, and prior readings. Stable low exposure is acceptable; a confirmed upward band shift or accelerating change is a warning requiring examination; a validated high band, rapid acceleration, or chemical signal accompanied by deformation is unacceptable and requires preservation-manager review. Approved responses may include separation from shared enclosures, ventilated rehousing, colder storage, prioritized duplication, or specialist treatment. Fresh coupons then test whether the response reduced continuing acid exposure.","mechanism_mapping":[{"counterfactual_removal":"Without the acid-reactive coupon, enclosure-level chemical deterioration remains invisible until odor, deformation, or playback damage becomes conspicuous.","mechanism_slug":"condition_monitoring_sensor","role":"Chemically transduces cumulative acidic-vapor exposure into a persistent optical condition signal."},{"counterfactual_removal":"Without recurring coupon replacement and comparison, the intervention becomes a one-time test and cannot reveal persistence or acceleration.","mechanism_slug":"preventive_inspection","role":"Samples enclosure condition while conservation and duplication remain feasible."},{"counterfactual_removal":"Without periodic comparison of chemical readings with direct physical examination, thresholds could drift away from actual carrier condition.","mechanism_slug":"infrastructure_condition_assessment","role":"Pairs the leading chemical signal with conservator examination of shrinkage, brittleness, deformation, adhesion, and handling condition."},{"counterfactual_removal":"Without review of flagged objects and available preservation capacity, measurements could accumulate without isolation, cooling, rehousing, or duplication.","mechanism_slug":"maintenance_backlog_review","role":"Prioritizes confirmed chemical deterioration by severity, acceleration, uniqueness, shared-enclosure risk, and response lead time."}],"nearest_rivals":["Room-level temperature and humidity logging: measures environmental stress but not object-specific acid production or accumulation inside individual enclosures.","Calendar-based film inspection: schedules examination regardless of condition and may inspect too late or repeatedly inspect stable objects.","Odor-based vinegar-syndrome detection: is subjective, exposes staff to vapors, and usually detects deterioration only after substantial off-gassing.","One-time physical condition survey: identifies present damage but lacks recurring chemical trend memory and post-response verification.","Immediate mass digitization: may preserve content but does not reveal which carriers are becoming unsafe or prioritize limited handling and duplication capacity by deterioration rate."],"negative_tests":{"intervention_falsifier":"The intervention is falsified if blinded conservator examinations and independent chemical measurements show that coupon-band changes do not reproducibly distinguish increasing acidic exposure from control aging and environmental variation, or if readings do not change after interventions known to reduce enclosure exposure.","problem_falsifier":"The inferred problem is falsified if material identification finds no cellulose-acetate carriers in scope, or if longitudinal chemical and physical examinations show no gradual or accelerating deterioration for which earlier conservation action would preserve options.","risks":["Opening enclosures may expose staff to concentrated vapors or disturb fragile carriers.","Misidentified nitrate or otherwise hazardous film may enter the sample.","Coupon dyes, binders, or holders may contaminate collection materials if compatibility and containment fail.","Humidity, temperature, illumination, coupon aging, and manufacturing-lot variation may cause false readings.","A low reading may create false reassurance where deterioration products escape through a highly ventilated enclosure.","Cold-storage transfer can cause condensation or handling damage if acclimatization procedures are inadequate.","Warnings may exceed available cold-storage, conservation, or duplication capacity.","Condition prioritization may inadvertently disadvantage culturally important but poorly described materials unless significance decisions remain separate."],"strongest_counterevidence":"The strongest counterevidence would be poor correspondence between rising coupon exposure and independently confirmed acetate deterioration, especially if enclosure ventilation or ambient acids dominate readings and prevent the sensor from identifying which carriers are actually degrading."},"next_evidence_step":"Conduct a twelve-week bounded validation using sealed surrogate chambers spanning conservator-approved acetic-acid exposure bands, followed by noncontact monitoring of 20 confirmed acetate objects already scheduled for examination and 10 non-acetate enclosure controls. Use lot-matched blanks, standardized illumination, duplicate blinded readers, handheld colorimetry, and baseline/end-point conservator examinations. Draft response recommendations without moving or treating objects. Continue only if coupon changes are repeatable, distinguish controls, precede or correspond to physical condition evidence, and can be collected without contamination or unsafe exposure.","observable_state":"For each monitored enclosure, retain the carrier identification confidence, coupon lot, installation and removal times, control-corrected color or reflectance band, temperature and humidity range, visible shrinkage or deformation, handling restriction, trend direction, response decision, and post-response reading. Healthy means no control-corrected shift and no physical deterioration signal; acceptable means a stable low exposure band; warning means a reproducible upward shift or persistent moderate band; unacceptable means a validated high band, rapid acceleration, or chemical warning accompanied by physical deformation or unsafe handling condition.","prior_art_status":"UNSEARCHED","problem":"Cellulose-acetate film, tape, and related audiovisual carriers can undergo slow hydrolysis inside their enclosures. Early acid release may be locally invisible, while retained acetic acid accelerates further polymer breakdown. Visual surveys and room-level environmental monitors can therefore report acceptable conditions even as particular cans or boxes approach irreversible shrinkage, brittleness, distortion, and loss of playability.","proposal_index":2,"remaining_contrastive_claim":"Unlike ambient environmental logging, odor detection, calendar inspections, or one-time surveys, the sentinel directly samples cumulative acidic-vapor exposure inside individual enclosures, preserves repeated condition history, applies validated warning bands, and verifies whether conservation responses reduce continuing chemical deterioration.","revision_record":{"claim_changes":["Initial version; no claims of novelty, prevalence, calibrated clinical-equivalent thresholds, or effect size are made.","Threshold validity is explicitly contingent on controlled calibration and comparison with independent physical examination."],"conceptual_changes":["Maps deterioration monitoring to autocatalytic chemical decay of physical audiovisual carriers rather than decay of metadata-mediated discovery access.","Makes chemical-to-optical transduction the essential intervention substrate and keeps records, authority, and prioritization as supporting wrappers."],"evidence_changes":["No external evidence or prior proposals beyond the supplied sealed P1 were inspected; prior art remains unsearched.","Adds controlled chambers, non-acetate controls, blinded readers, colorimetry, and conservator examination as validation evidence."],"operational_changes":["Bounds the initial deployment to compatible noncontact coupons and objects already scheduled for inspection.","Separates measurement authority from authority to relocate, treat, duplicate, freeze, or discard objects."],"parent_version":null,"progress_targets_addressed":["Material independence from the sealed P1","Physical and measurement substrate eligibility","Complete deterioration-to-response causal loop","Explicit contamination and staff-safety controls","Problem and intervention falsifiers","Bounded validation step"]},"schema_version":1,"structural_mapping":[{"archetype_element":"Condition to preserve","domain_realization":"Physical stability, safe handleability, playability, and reformattability of cellulose-acetate audiovisual carriers."},{"archetype_element":"Baseline condition and bands","domain_realization":"Control-corrected acid-coupon readings and conservator examination establish healthy, acceptable, warning, and unacceptable enclosure conditions."},{"archetype_element":"Leading and lagging deterioration indicators","domain_realization":"Leading signals are cumulative acidic-vapor exposure and its rate of increase; lagging signals include shrinkage, brittleness, distortion, adhesion, and playback impairment."},{"archetype_element":"Inspection cadence","domain_realization":"Coupons are replaced and read at intervals set from observed acid-accumulation speed, enclosure type, storage temperature, and preservation-response lead time."},{"archetype_element":"Trend interpretation","domain_realization":"Sequential control-corrected coupon readings reveal direction, persistence, and acceleration rather than treating one color observation as decisive."},{"archetype_element":"Thresholds and escalation","domain_realization":"Confirmed upward shifts trigger examination, while validated high or rapidly accelerating readings escalate to the conservator and preservation manager."},{"archetype_element":"Response pathway","domain_realization":"Approved findings can lead to isolation, ventilated rehousing, colder storage, handling restrictions, prioritized duplication, or specialist treatment."},{"archetype_element":"Monitoring recalibration","domain_realization":"Control behavior, reader disagreement, independent examination, enclosure ventilation, post-response readings, and missed damage inform revisions to coupon chemistry, bands, and cadence."}],"substrate_contract":{"counterfactual_independence":"If databases, software, algorithms, dashboards, notifications, and workflow rules are removed, the acid-reactive coupon still undergoes a chemically caused optical change inside the enclosure, a person can compare it with a physical reference scale, successive coupons retain trend evidence, and conservators can act on the result. These wrappers improve recordkeeping but do not create the deterioration signal.","forbidden_channel_audit":"Governance assigns authority, a ledger preserves history, and optional software may copy readings or issue reminders; none senses acetate decay. Training supports safe handling but does not supply detection. No incentive, information-routing, model, algorithm, database, or digital-control channel substitutes for the coupon's chemical reaction and optical measurement.","primary_allowed_process":"MEASUREMENT_INSTRUMENTATION"},"title":"Acid-Off-Gassing Sentinels for Cellulose-Acetate Audiovisual Holdings","version":0},"schema_version":1}