{ "hardware_measured": false, "new_firmware_execution": false, "full_integrated_matrix_pass": null, "matrix_note": "This timing-only audit does not determine execution acceptance; use the case ledger.", "limits": [ "Results apply only to captured, fixed-clock behavioral-model data.", "Sensor-counter rate is not physical clock accuracy or calibrated synchronization.", "Read-window causality checks do not calibrate the initial IRQ/FIFO origin." ], "captures": [ { "case": "adc-busy-stays-low", "scope": "post-processing of existing saved capture", "streams": { "emg": { "samples": 0, "first_trigger_us": null, "last_trigger_us": null, "observed_trigger_rate_hz": null, "trigger_interval_us": null, "trigger_to_read_start_us": null, "read_duration_us": null, "read_end_to_next_trigger_us": null, "pass": true, "errors": [] }, "foot": { "samples": 11, "tick_us": "32/30", "first_estimate_us": 875001, "last_estimate_us": 925001, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4687.5, "max": 4688 }, "estimate_to_read_end_us": { "min": 1955, "median": 26955, "max": 51955 }, "irq_anchor_age_at_read_us": { "min": 416, "median": 416, "max": 416 }, "first_estimate_minus_first_anchor_us": -50000, "timing_uncertain_samples": 11, "counter_rollovers": 0, "pass": true, "errors": [] }, "shank": { "samples": 0, "tick_us": "32/30", "first_estimate_us": null, "last_estimate_us": null, "sensor_counter_rate_hz": null, "raw_counter_delta_us": null, "estimate_to_read_end_us": null, "irq_anchor_age_at_read_us": null, "first_estimate_minus_first_anchor_us": null, "timing_uncertain_samples": 0, "counter_rollovers": 0, "pass": true, "errors": [] } }, "sha256": { "converted/emg.csv": "b0547a1a9705cf743bd7135ce00cf85a8f3d5cc0b8586e0311c80fc2b681ee01", "converted/foot.csv": "228944f3040e5068b6580a87d26ddcd621da68407daa58fcd253ffadf7827372", "converted/shank.csv": "17623e12d0fad07eb07aafd457e49105437a986464bb169d21f2107c4b9068c0", "recorder-output.raw": "64bdce0955ed4ebc76fd8ba5ab1e99d83890610a2908ba9e9e718c255280c031" }, "firmware": "ad7606-2ch-1.12", "production_metadata_bytes": 1317, "wifi_metadata_capacity_bytes": 1400, "wifi_metadata_remaining_bytes": 83, "available_stream_timing_checks_pass": true, "full_case_execution_pass": null, "qualification_note": "Timing checks neither upgrade incomplete/quota-blocked executions nor establish physical timing. Empty or absent streams have no rate evidence." }, { "case": "adc-stuck-busy", "scope": "post-processing of existing saved capture", "streams": { "emg": { "samples": 0, "first_trigger_us": null, "last_trigger_us": null, "observed_trigger_rate_hz": null, "trigger_interval_us": null, "trigger_to_read_start_us": null, "read_duration_us": null, "read_end_to_next_trigger_us": null, "pass": true, "errors": [] }, "foot": { "samples": 11, "tick_us": "32/30", "first_estimate_us": 875001, "last_estimate_us": 925001, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4687.5, "max": 4688 }, "estimate_to_read_end_us": { "min": 1955, "median": 26955, "max": 51955 }, "irq_anchor_age_at_read_us": { "min": 416, "median": 416, "max": 416 }, "first_estimate_minus_first_anchor_us": -50000, "timing_uncertain_samples": 11, "counter_rollovers": 0, "pass": true, "errors": [] }, "shank": { "samples": 0, "tick_us": "32/30", "first_estimate_us": null, "last_estimate_us": null, "sensor_counter_rate_hz": null, "raw_counter_delta_us": null, "estimate_to_read_end_us": null, "irq_anchor_age_at_read_us": null, "first_estimate_minus_first_anchor_us": null, "timing_uncertain_samples": 0, "counter_rollovers": 0, "pass": true, "errors": [] } }, "sha256": { "converted/emg.csv": "b0547a1a9705cf743bd7135ce00cf85a8f3d5cc0b8586e0311c80fc2b681ee01", "converted/foot.csv": "228944f3040e5068b6580a87d26ddcd621da68407daa58fcd253ffadf7827372", "converted/shank.csv": "17623e12d0fad07eb07aafd457e49105437a986464bb169d21f2107c4b9068c0", "recorder-output.raw": "3195d4146d58710297940acdece644b413544667540645746934aa295bff9cc4" }, "firmware": "ad7606-2ch-1.12", "production_metadata_bytes": 1317, "wifi_metadata_capacity_bytes": 1400, "wifi_metadata_remaining_bytes": 83, "available_stream_timing_checks_pass": true, "full_case_execution_pass": null, "qualification_note": "Timing checks neither upgrade incomplete/quota-blocked executions nor establish physical timing. Empty or absent streams have no rate evidence." }, { "case": "adc-trigger-ignored", "scope": "post-processing of existing saved capture", "streams": { "emg": { "samples": 0, "first_trigger_us": null, "last_trigger_us": null, "observed_trigger_rate_hz": null, "trigger_interval_us": null, "trigger_to_read_start_us": null, "read_duration_us": null, "read_end_to_next_trigger_us": null, "pass": true, "errors": [] }, "foot": { "samples": 11, "tick_us": "32/30", "first_estimate_us": 875001, "last_estimate_us": 925001, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4687.5, "max": 4688 }, "estimate_to_read_end_us": { "min": 1955, "median": 26955, "max": 51955 }, "irq_anchor_age_at_read_us": { "min": 416, "median": 416, "max": 416 }, "first_estimate_minus_first_anchor_us": -50000, "timing_uncertain_samples": 11, "counter_rollovers": 0, "pass": true, "errors": [] }, "shank": { "samples": 0, "tick_us": "32/30", "first_estimate_us": null, "last_estimate_us": null, "sensor_counter_rate_hz": null, "raw_counter_delta_us": null, "estimate_to_read_end_us": null, "irq_anchor_age_at_read_us": null, "first_estimate_minus_first_anchor_us": null, "timing_uncertain_samples": 0, "counter_rollovers": 0, "pass": true, "errors": [] } }, "sha256": { "converted/emg.csv": "b0547a1a9705cf743bd7135ce00cf85a8f3d5cc0b8586e0311c80fc2b681ee01", "converted/foot.csv": "228944f3040e5068b6580a87d26ddcd621da68407daa58fcd253ffadf7827372", "converted/shank.csv": "17623e12d0fad07eb07aafd457e49105437a986464bb169d21f2107c4b9068c0", "recorder-output.raw": "aa4fc5a068dafa3c1c6aa448fde9c700847c46698e5d7b44d70d3fc25eef59b7" }, "firmware": "ad7606-2ch-1.12", "production_metadata_bytes": 1317, "wifi_metadata_capacity_bytes": 1400, "wifi_metadata_remaining_bytes": 83, "available_stream_timing_checks_pass": true, "full_case_execution_pass": null, "qualification_note": "Timing checks neither upgrade incomplete/quota-blocked executions nor establish physical timing. Empty or absent streams have no rate evidence." }, { "case": "battery-low", "scope": "post-processing of existing saved capture", "streams": { "emg": { "samples": 24004, "first_trigger_us": 927388, "last_trigger_us": 3933841, "observed_trigger_rate_hz": 7983.82678857777, "trigger_interval_us": { "min": 122, "median": 125, "max": 128 }, "trigger_to_read_start_us": { "min": 7, "median": 7.0, "max": 12 }, "read_duration_us": { "min": 23, "median": 24.0, "max": 29 }, "read_end_to_next_trigger_us": { "min": 89, "median": 94, "max": 98 }, "pass": true, "errors": [] }, "foot": { "samples": 612, "tick_us": "32/30", "first_estimate_us": 875001, "last_estimate_us": 3930001, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4688, "max": 4688 }, "estimate_to_read_end_us": { "min": 375, "median": 568.0, "max": 51955 }, "irq_anchor_age_at_read_us": { "min": 307, "median": 310.0, "max": 4986 }, "first_estimate_minus_first_anchor_us": -50000, "timing_uncertain_samples": 612, "counter_rollovers": 43, "pass": true, "errors": [] }, "shank": { "samples": 601, "tick_us": "32/30", "first_estimate_us": 930002, "last_estimate_us": 3930002, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4687.5, "max": 4688 }, "estimate_to_read_end_us": { "min": 325, "median": 835, "max": 7096 }, "irq_anchor_age_at_read_us": { "min": 88, "median": 577, "max": 4936 }, "first_estimate_minus_first_anchor_us": 0, "timing_uncertain_samples": 601, "counter_rollovers": 42, "pass": true, "errors": [] } }, "sha256": { "converted/emg.csv": "5f3135c777752f808210e88b16765581daa129ac1355a30a1cda720ef66ac7e9", "converted/foot.csv": "f1205561482acf43a05c0dc83aa3fdd682375e61a4e3c7331ba0b33c86e367ae", "converted/shank.csv": "578760457261a7f47e5f1c024f5ec9ae45a0ccfcd05a12660354086ad8e0ed96", "recorder-output.raw": "3e5f39c0288c43f528aaf9bdf51ddd7707cfc501621c75aa3848bede7ccab3f9" }, "firmware": "ad7606-2ch-1.12", "production_metadata_bytes": 1317, "wifi_metadata_capacity_bytes": 1400, "wifi_metadata_remaining_bytes": 83, "startup": { "first_shank_minus_first_foot_estimate_us": 55001, "foot_minus_shank_sample_count": 11, "explanation": "Production imu_start calls run sequentially and each waits 50 ms before enabling FIFO; unequal startup counts are not automatically sample loss.", "synchronization_measured": false, "offset_limit": "Each time origin depends on its own first IRQ/FIFO observation. This is an estimated startup offset, not measured foot-shank synchronization; independent clock drift and initial anchor error remain uncalibrated.", "foot_first_estimate_minus_first_emg_trigger_us": -52387, "shank_first_estimate_minus_first_emg_trigger_us": 2614 }, "available_stream_timing_checks_pass": true, "full_case_execution_pass": null, "qualification_note": "Timing checks neither upgrade incomplete/quota-blocked executions nor establish physical timing. Empty or absent streams have no rate evidence." }, { "case": "filtered-synthetic-emg", "scope": "post-processing of existing saved capture", "streams": { "emg": { "samples": 10039, "first_trigger_us": 927388, "last_trigger_us": 2184669, "observed_trigger_rate_hz": 7983.895406038904, "trigger_interval_us": { "min": 122, "median": 125.0, "max": 128 }, "trigger_to_read_start_us": { "min": 7, "median": 7, "max": 12 }, "read_duration_us": { "min": 23, "median": 24, "max": 29 }, "read_end_to_next_trigger_us": { "min": 89, "median": 94.0, "max": 97 }, "pass": true, "errors": [] }, "foot": { "samples": 262, "tick_us": "32/30", "first_estimate_us": 875001, "last_estimate_us": 2180001, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4688, "max": 4688 }, "estimate_to_read_end_us": { "min": 375, "median": 568.0, "max": 51955 }, "irq_anchor_age_at_read_us": { "min": 307, "median": 310.0, "max": 4986 }, "first_estimate_minus_first_anchor_us": -50000, "timing_uncertain_samples": 262, "counter_rollovers": 18, "pass": true, "errors": [] }, "shank": { "samples": 251, "tick_us": "32/30", "first_estimate_us": 930002, "last_estimate_us": 2180002, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4687.5, "max": 4688 }, "estimate_to_read_end_us": { "min": 325, "median": 835, "max": 6820 }, "irq_anchor_age_at_read_us": { "min": 389, "median": 577, "max": 4936 }, "first_estimate_minus_first_anchor_us": 0, "timing_uncertain_samples": 251, "counter_rollovers": 17, "pass": true, "errors": [] } }, "sha256": { "converted/emg.csv": "1ff00af0941b3a96e05fb9ccf2cbe93f663c85c5e56a0b9326cd82a593023f50", "converted/foot.csv": "dbb3810c7bb2533efed0dab24be5e147ade38e4c9805803f3f345ed60785daa4", "converted/shank.csv": "279e9507b90b6e3603d0d5ee9ed69a21d288427198473386febd965dada19de2", "recorder-output.raw": "ef6044ffb7d9f205131c8774f9ce9d92e9f16f1f9706b6a90476c824c8ef6426" }, "firmware": "ad7606-2ch-1.12", "production_metadata_bytes": 1317, "wifi_metadata_capacity_bytes": 1400, "wifi_metadata_remaining_bytes": 83, "startup": { "first_shank_minus_first_foot_estimate_us": 55001, "foot_minus_shank_sample_count": 11, "explanation": "Production imu_start calls run sequentially and each waits 50 ms before enabling FIFO; unequal startup counts are not automatically sample loss.", "synchronization_measured": false, "offset_limit": "Each time origin depends on its own first IRQ/FIFO observation. This is an estimated startup offset, not measured foot-shank synchronization; independent clock drift and initial anchor error remain uncalibrated.", "foot_first_estimate_minus_first_emg_trigger_us": -52387, "shank_first_estimate_minus_first_emg_trigger_us": 2614 }, "available_stream_timing_checks_pass": true, "full_case_execution_pass": null, "qualification_note": "Timing checks neither upgrade incomplete/quota-blocked executions nor establish physical timing. Empty or absent streams have no rate evidence." }, { "case": "imu-fifo-overflow", "scope": "post-processing of existing saved capture", "streams": { "emg": { "samples": 0, "first_trigger_us": null, "last_trigger_us": null, "observed_trigger_rate_hz": null, "trigger_interval_us": null, "trigger_to_read_start_us": null, "read_duration_us": null, "read_end_to_next_trigger_us": null, "pass": true, "errors": [] }, "foot": { "samples": 0, "tick_us": "32/30", "first_estimate_us": null, "last_estimate_us": null, "sensor_counter_rate_hz": null, "raw_counter_delta_us": null, "estimate_to_read_end_us": null, "irq_anchor_age_at_read_us": null, "first_estimate_minus_first_anchor_us": null, "timing_uncertain_samples": 0, "counter_rollovers": 0, "pass": true, "errors": [] }, "shank": { "samples": 0, "tick_us": "32/30", "first_estimate_us": null, "last_estimate_us": null, "sensor_counter_rate_hz": null, "raw_counter_delta_us": null, "estimate_to_read_end_us": null, "irq_anchor_age_at_read_us": null, "first_estimate_minus_first_anchor_us": null, "timing_uncertain_samples": 0, "counter_rollovers": 0, "pass": true, "errors": [] } }, "sha256": { "converted/emg.csv": "b0547a1a9705cf743bd7135ce00cf85a8f3d5cc0b8586e0311c80fc2b681ee01", "converted/foot.csv": "17623e12d0fad07eb07aafd457e49105437a986464bb169d21f2107c4b9068c0", "converted/shank.csv": "17623e12d0fad07eb07aafd457e49105437a986464bb169d21f2107c4b9068c0", "recorder-output.raw": "55182bc66f625091944518651842ee784fffd7861422dc278737e77a51a5ba76" }, "firmware": "ad7606-2ch-1.12", "production_metadata_bytes": 1317, "wifi_metadata_capacity_bytes": 1400, "wifi_metadata_remaining_bytes": 83, "available_stream_timing_checks_pass": null, "full_case_execution_pass": null, "qualification_note": "Timing checks neither upgrade incomplete/quota-blocked executions nor establish physical timing. Empty or absent streams have no rate evidence." }, { "case": "imu-missing-interrupt", "scope": "post-processing of existing saved capture", "streams": { "emg": { "samples": 805, "first_trigger_us": 925558, "last_trigger_us": 1026262, "observed_trigger_rate_hz": 7983.794089609151, "trigger_interval_us": { "min": 125, "median": 125.0, "max": 126 }, "trigger_to_read_start_us": { "min": 7, "median": 7, "max": 11 }, "read_duration_us": { "min": 23, "median": 24, "max": 28 }, "read_end_to_next_trigger_us": { "min": 90, "median": 94.0, "max": 95 }, "pass": true, "errors": [] }, "foot": { "samples": 0, "tick_us": "32/30", "first_estimate_us": null, "last_estimate_us": null, "sensor_counter_rate_hz": null, "raw_counter_delta_us": null, "estimate_to_read_end_us": null, "irq_anchor_age_at_read_us": null, "first_estimate_minus_first_anchor_us": null, "timing_uncertain_samples": 0, "counter_rollovers": 0, "pass": true, "errors": [] }, "shank": { "samples": 20, "tick_us": "32/30", "first_estimate_us": 930000, "last_estimate_us": 1025000, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4688, "max": 4688 }, "estimate_to_read_end_us": { "min": 569, "median": 569.0, "max": 3347 }, "irq_anchor_age_at_read_us": { "min": 309, "median": 311.0, "max": 3088 }, "first_estimate_minus_first_anchor_us": 0, "timing_uncertain_samples": 20, "counter_rollovers": 1, "pass": true, "errors": [] } }, "sha256": { "converted/emg.csv": "10ef60896ebae6e5019e69ddd4344b3d12683a702d46b474c27fc4f78fd5ca2a", "converted/foot.csv": "17623e12d0fad07eb07aafd457e49105437a986464bb169d21f2107c4b9068c0", "converted/shank.csv": "42e95193d9e40f2b1c24ef5629277bb8b3e2873b50a5c86b686d3f99d2f22383", "recorder-output.raw": "be06ef9b156f472381a9127fce289a0c39c9c88c822776c6f7e4b014648d9447" }, "firmware": "ad7606-2ch-1.12", "production_metadata_bytes": 1317, "wifi_metadata_capacity_bytes": 1400, "wifi_metadata_remaining_bytes": 83, "available_stream_timing_checks_pass": true, "full_case_execution_pass": null, "qualification_note": "Timing checks neither upgrade incomplete/quota-blocked executions nor establish physical timing. Empty or absent streams have no rate evidence." }, { "case": "interrupted-recording", "scope": "post-processing of existing saved capture", "streams": { "emg": { "samples": 7984, "first_trigger_us": 927388, "last_trigger_us": 1927275, "observed_trigger_rate_hz": 7983.902180946447, "trigger_interval_us": { "min": 123, "median": 125, "max": 128 }, "trigger_to_read_start_us": { "min": 7, "median": 7.0, "max": 12 }, "read_duration_us": { "min": 23, "median": 24.0, "max": 29 }, "read_end_to_next_trigger_us": { "min": 89, "median": 94, "max": 97 }, "pass": true, "errors": [] }, "foot": { "samples": 211, "tick_us": "32/30", "first_estimate_us": 875001, "last_estimate_us": 1925001, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4687.5, "max": 4688 }, "estimate_to_read_end_us": { "min": 369, "median": 568, "max": 51955 }, "irq_anchor_age_at_read_us": { "min": 308, "median": 310, "max": 4980 }, "first_estimate_minus_first_anchor_us": -50000, "timing_uncertain_samples": 211, "counter_rollovers": 15, "pass": true, "errors": [] }, "shank": { "samples": 200, "tick_us": "32/30", "first_estimate_us": 930002, "last_estimate_us": 1925002, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4688, "max": 4688 }, "estimate_to_read_end_us": { "min": 320, "median": 835.0, "max": 6813 }, "irq_anchor_age_at_read_us": { "min": 384, "median": 577.0, "max": 4931 }, "first_estimate_minus_first_anchor_us": 0, "timing_uncertain_samples": 200, "counter_rollovers": 14, "pass": true, "errors": [] } }, "sha256": { "converted/emg.csv": "79f7764ce85dabb4978a6d9b2badb5e6c8140d2cd3fe1fd02b5494bfe8ab2d14", "converted/foot.csv": "ebcfdd5a4223c60762ad2252a6381a8fb04f06ca08a326df427067d69927f889", "converted/shank.csv": "d0d0453ce7fbf756dc6c5c13fc307abbd4716342c4ed86a7af85af9e0def9ea3", "recorder-output.raw": "5312874a78536f8aff1eea5f70a3d4f745d91bf078e01e297ddc73456c2f262c" }, "firmware": "ad7606-2ch-1.12", "production_metadata_bytes": 1317, "wifi_metadata_capacity_bytes": 1400, "wifi_metadata_remaining_bytes": 83, "startup": { "first_shank_minus_first_foot_estimate_us": 55001, "foot_minus_shank_sample_count": 11, "explanation": "Production imu_start calls run sequentially and each waits 50 ms before enabling FIFO; unequal startup counts are not automatically sample loss.", "synchronization_measured": false, "offset_limit": "Each time origin depends on its own first IRQ/FIFO observation. This is an estimated startup offset, not measured foot-shank synchronization; independent clock drift and initial anchor error remain uncalibrated.", "foot_first_estimate_minus_first_emg_trigger_us": -52387, "shank_first_estimate_minus_first_emg_trigger_us": 2614 }, "available_stream_timing_checks_pass": true, "full_case_execution_pass": null, "qualification_note": "Timing checks neither upgrade incomplete/quota-blocked executions nor establish physical timing. Empty or absent streams have no rate evidence." }, { "case": "no-wireless-subscriber", "scope": "post-processing of existing saved capture", "streams": { "emg": { "samples": 10040, "first_trigger_us": 927185, "last_trigger_us": 2184585, "observed_trigger_rate_hz": 7983.935104183235, "trigger_interval_us": { "min": 122, "median": 125, "max": 128 }, "trigger_to_read_start_us": { "min": 7, "median": 7.0, "max": 11 }, "read_duration_us": { "min": 23, "median": 24.0, "max": 29 }, "read_end_to_next_trigger_us": { "min": 89, "median": 94, "max": 97 }, "pass": true, "errors": [] }, "foot": { "samples": 262, "tick_us": "32/30", "first_estimate_us": 875001, "last_estimate_us": 2180001, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4688, "max": 4688 }, "estimate_to_read_end_us": { "min": 373, "median": 568.0, "max": 51955 }, "irq_anchor_age_at_read_us": { "min": 307, "median": 310.0, "max": 4984 }, "first_estimate_minus_first_anchor_us": -50000, "timing_uncertain_samples": 262, "counter_rollovers": 18, "pass": true, "errors": [] }, "shank": { "samples": 251, "tick_us": "32/30", "first_estimate_us": 930002, "last_estimate_us": 2180002, "sensor_counter_rate_hz": 200.0, "raw_counter_delta_us": { "min": 4687, "median": 4687.5, "max": 4688 }, "estimate_to_read_end_us": { "min": 321, "median": 834, "max": 6817 }, "irq_anchor_age_at_read_us": { "min": 387, "median": 576, "max": 4933 }, "first_estimate_minus_first_anchor_us": 0, "timing_uncertain_samples": 251, "counter_rollovers": 17, "pass": true, "errors": [] } }, "sha256": { "converted/emg.csv": "041eb08d52c32facf5aef87e868825b44eb74ef272f524916468ff4ef1633a88", "converted/foot.csv": "5986a3e5f5f9625c5fbb4b3197c0564607e44d4244e9d9c026fabd059d6324d4", "converted/shank.csv": "b24efa829362448bcac9fa1eb81864146afa2f42e7358e9fb185f3f1e9382806", "recorder-output.raw": "216fd4ae51a52382ed81e8a67a7890be996573ad8aa250495cdcb4d9d5944b62" }, "firmware": "ad7606-2ch-1.12", "production_metadata_bytes": 1317, "wifi_metadata_capacity_bytes": 1400, "wifi_metadata_remaining_bytes": 83, "startup": { "first_shank_minus_first_foot_estimate_us": 55001, "foot_minus_shank_sample_count": 11, "explanation": "Production imu_start calls run sequentially and each waits 50 ms before enabling FIFO; unequal startup counts are not automatically sample loss.", "synchronization_measured": false, "offset_limit": "Each time origin depends on its own first IRQ/FIFO observation. 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