{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp12_substrate_denial72_20260805","cell_id":"objective_weighting_governance__computer_science","arm":"CONSTRAINED_HIGH","candidate_id":"objective_weighting_governance__computer_science__CONSTRAINED_HIGH","decision":"PROPOSAL","abstention_reason":null,"proposal":{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp12_substrate_denial72_20260805","cell_id":"objective_weighting_governance__computer_science","arm":"CONSTRAINED_HIGH","candidate_id":"objective_weighting_governance__computer_science__CONSTRAINED_HIGH","proposal_index":1,"version":0,"title":"Cartridge-Weighted Passive Coolant Allocator for Compute Modules","problem":"In a liquid-cooled edge-compute cabinet with limited shared pump capacity, parallel branches compete for coolant. Fixed restrictions can send excess flow through low-resistance branches while a hotter or operationally critical module approaches its thermal trip point. A software valve controller can balance thermal protection, pumping burden, and service-continuity priorities, but it may be unavailable during controller, network, or power-domain faults.","actors":["Liquid-cooled compute modules","Shared coolant pump and manifold","Module cold plates","Thermal expansion capsules","Differential-pressure bellows","Mechanical summing levers","Replaceable weight cartridges","Branch metering valves","Independent thermal-override latches","Facilities thermal engineer","Laboratory safety lead"],"observable_state":"For each branch, directly observable states are coolant inlet and outlet temperature, differential pressure, valve position, and volumetric flow. The system state of concern is unequal flow during constrained pump operation, especially when a branch temperature rises toward a protected hardware limit.","consequence":"A starved branch can reach a hardware thermal trip, forcing abrupt compute interruption; an overly favored branch can consume scarce pump head without equivalent thermal need. The proposal changes physical coolant allocation rather than scheduling or classifying software workloads.","affected_objective":"Allocate limited coolant among compute modules while balancing local thermal demand, branch hydraulic burden, and a physically declared continuity priority, without allowing any weighted tradeoff to defeat a noncompensable thermal limit.","intervention":"Install a passive valve assembly on each coolant branch. A wax expansion capsule produces force from local coolant temperature, a bellows produces opposing force from branch differential pressure, and a keyed spring cartridge supplies a declared continuity-priority bias. A mechanical summing lever combines these forces; labeled lever-arm detents set their relative weights, and the resulting displacement meters the branch valve. A separate bimetallic latch bypasses the weighted balance and drives the valve fully open when the protected temperature is reached. Weight changes require swapping calibrated, visibly coded cartridges or moving keyed lever arms. Software may record settings, but neither software nor a human instruction is required for temperature, pressure, cartridge force, lever motion, threshold override, or coolant redirection.","structural_mapping":[{"archetype_element":"Objective Set","domain_realization":"Three physically distinct terms govern valve motion: thermal demand, hydraulic burden, and declared continuity bias."},{"archetype_element":"Objective Weight","domain_realization":"Lever-arm geometry and calibrated cartridge force physically scale each term before the forces are summed."},{"archetype_element":"Weight-Setting Process","domain_realization":"Keyed cartridges and discrete lever detents bound the realizable weight combinations and make a change a concrete hardware substitution rather than a hidden coefficient edit."},{"archetype_element":"Stakeholder Review","domain_realization":"Labels, detent positions, cartridge part numbers, and direct flow indicators allow proposed configurations to be inspected on the apparatus; review is a safety wrapper and is not in the operative flow-control path."},{"archetype_element":"Legitimacy Rule","domain_realization":"Only mechanically compatible cartridges and detents can be installed, while the independent thermal latch makes the protected limit noncompensable."},{"archetype_element":"Weight Sensitivity Analysis","domain_realization":"Alternative cartridges and detents can be exchanged on a bench loop so changes in branch flow, temperature trajectory, and valve position are measured directly."},{"archetype_element":"Revision Procedure","domain_realization":"Weights are reversible by returning to a previously characterized cartridge and detent combination."},{"archetype_element":"Decision Impact Trace","domain_realization":"Valve-position scales and branch flowmeters expose how each physical weight configuration redistributes coolant."},{"archetype_element":"Protected Threshold","domain_realization":"A separate bimetallic latch forces full opening at the protected temperature regardless of the weighted force balance."},{"archetype_element":"Audit Trail","domain_realization":"Serialized cartridges and tamper-evident witness marks can identify the installed physical configuration; this recordkeeping is optional to the hydraulic effect."},{"archetype_element":"Score Interpretation Rule","domain_realization":"The summed mechanical displacement authorizes only branch-valve movement; it cannot schedule jobs, admit users, or make broader operational decisions."}],"mechanism_mapping":[{"mechanism_slug":"weighted_sum_objective","role":"The summing lever implements a continuous physical weighted sum of temperature force, pressure force, and cartridge bias, with valve displacement as its bounded output.","counterfactual_removal":"Removing the lever or its weighted geometry eliminates multiobjective balancing; the branch reduces to an uncombined thermostat, fixed restriction, or closed valve."},{"mechanism_slug":"weight_sensitivity_sweep","role":"A finite set of interchangeable cartridges and detents permits physical counterfactual trials over plausible weight combinations.","counterfactual_removal":"The installed valve can still allocate coolant, but fragility to alternative weights cannot be experimentally characterized in the intended modular way."},{"mechanism_slug":"audit_trail_for_weight_changes","role":"Serialized cartridges and witness marks make physical setting changes attributable without being part of valve actuation.","counterfactual_removal":"Traceability is lost, but the temperature-to-force, pressure-to-force, force-summing, threshold-override, and coolant-routing effects remain."}],"causal_chain":["Shared pump capacity falls or branch heat loads diverge, creating competition for coolant.","Local temperature expands the wax capsule, branch pressure acts on the bellows, and the installed cartridge applies its calibrated bias.","Lever-arm positions scale these forces and mechanically sum them.","The force balance displaces the metering valve, altering branch hydraulic resistance.","Changed resistance redistributes coolant through the parallel manifold and changes branch temperature trajectories.","If a branch reaches the protected temperature, the independent bimetallic latch overrides the weighted balance and forces that valve open.","The resulting allocation persists without software, analytics, reporting, authorization checks, or procedural enforcement."],"baseline":"A manifold using fixed balancing orifices or ordinary single-input thermostatic valves. Fixed orifices cannot respond to changing heat distribution, while ordinary thermostatic valves do not explicitly balance thermal demand against branch pressure burden and a revisable physical priority bias.","nearest_rivals":["Software-controlled proportional valves using temperature and workload telemetry","Independent thermostatic valves with no shared-flow weighting","Pressure-compensating flow regulators with fixed factory settings","An oversized pump and manifold designed to avoid constrained-flow operation","A mechanically linked manifold that equalizes flow without distinguishing thermal demand or protected thresholds"],"remaining_contrastive_claim":"Relative to fixed restrictions and single-input thermostatic valves, the proposed assembly makes several competing allocation terms physically separable, visibly weighted, reversibly adjustable, and subordinate to an independent thermal threshold. This is a testable architectural contrast, not a claim of novelty or superior effect.","authority_safety":{"decision_authority":"A laboratory safety lead may authorize benchtop testing; any later connection to computing equipment would require the responsible facilities thermal engineer and hardware owner.","authorized_first_step":"Construct and test one isolated three-branch water loop with dummy heated cold plates, low-voltage instrumentation, pressure relief, a spill tray, and a finite predeclared set of cartridges and detents.","excluded_actions":["Connection to production or availability-critical compute hardware","Operation above component pressure or temperature ratings","Use of hazardous, reactive, or electrically conductive test fluids near energized electronics","Disabling the independent thermal override or pressure relief","Treating a weighted setting as authority to alter workloads, user access, or service priority","Unsupervised endurance operation"],"halt_rollback":"Stop the pump and heaters upon leakage, pressure excursion, sustained oscillation, valve seizure, unexpected nonmonotonic response, or failure of the thermal override. Depressurize the loop and restore the previously characterized neutral cartridge and detent configuration before further testing."},"negative_tests":{"strongest_counterevidence":"The strongest counterevidence would be that conventional thermostatic or pressure-compensating valves maintain acceptable branch temperatures under all tested constrained-flow states, while the added weighted mechanism contributes only friction, drift, or oscillation.","problem_falsifier":"The problem is unsupported for the tested setting if fixed-orifice and ordinary thermostatic baselines keep every dummy module below its protected temperature across the predeclared pump-derating and heat-load matrix, with no materially different branch starvation pattern to address.","intervention_falsifier":"The intervention is falsified if cartridge or lever-arm changes do not produce the predicted monotonic changes in steady branch flow and temperature, if repeated settings are not mechanically reproducible, or if the thermal latch fails to override every tested weighted configuration at its calibrated threshold.","risks":["Coolant leakage","Valve chatter or coupled manifold oscillation","Wax-capsule hysteresis and slow response","Spring fatigue, corrosion, fouling, or calibration drift","Cavitation or excessive pressure loss","A priority cartridge starving another branch below its thermal need","Thermal-override seizure or miscalibration","Visible weight labels being mistaken for verified physical calibration","Mechanical complexity reducing maintainability"]},"next_evidence_step":"On the isolated three-branch loop, compare fixed orifices, ordinary thermostatic valves, and the proposed assembly across a bounded matrix of three pump levels, three asymmetric heater patterns, and every predeclared cartridge configuration. Measure flow, differential pressure, temperature, valve position, settling behavior, repeatability, and thermal-override actuation. Run the proposed assembly with all logging and supervisory software disconnected to verify substrate independence.","prior_art_status":"UNSEARCHED","diversity_from_prior_proposals":"No other experiment candidates or proposals were inspected. This candidate is independently derived from the supplied archetype and domain card and uses a thermomechanical-hydraulic realization rather than a computational scoring or governance workflow.","revision_record":{"parent_version":null,"progress_targets_addressed":["Construct one causally defensible candidate under the binding substrate constraint","Preserve explicit weights, sensitivity, revision, and a protected threshold in physical form","Bound authority and the first evidence step","State counterfactual independence from forbidden wrappers"],"conceptual_changes":["Initial candidate; no parent revision"],"operational_changes":["Initial candidate; no parent revision"],"evidence_changes":["Prior art remains unsearched; proposed evidence is limited to a benchtop comparison"],"claim_changes":["No novelty, prevalence, demand, or effect-size claim is made"]},"substrate_contract":{"primary_allowed_process":"PHYSICAL_MATERIAL","counterfactual_independence":"With software, algorithms, databases, dashboards, reporting, incentives, authorization checks, and procedural enforcement removed, temperature still expands the wax capsule, pressure still loads the bellows, the cartridge still supplies bias, the lever still forms the weighted force balance, the valve still meters coolant, and the bimetallic latch still overrides the balance at the protected threshold. Thus the essential allocation effect remains physical and independently testable.","forbidden_channel_audit":"No algorithm calculates a score, no model infers demand, no database supplies a setting, and no report or human response closes the control loop. Sensors are direct transducers mechanically coupled to actuation. Labels, serialization, approval, and optional logging support inspection and safety only; deleting them does not interrupt the causal chain from thermal and hydraulic state to coolant redistribution."}}}