This repository is the reproducibility package for the “Implementing and evaluating the Timed Up and Go test automation using smartphones and smartwatches" journal paper, published in the IEEE Journal of Biomedical and Health Informatics.

M. Matey-Sanz, A. González-Pérez, S. Casteleyn and C. Granell, "Implementing and evaluating the Timed Up and Go test automation using smartphones and smartwatches", in IEEE Journal of Biomedical and Health Informatics, 28(11), 6863-6605, doi: 10.1109/JBHI.2024.3456169.

Click the on the "Binder" badge above to open an interactive Jupyter environment with all required software installed.

Install Python 3.8, download the repository, open a command line in the root of the directory and install the required software by executing:

pip install -r requirements.txt

Install Docker for building an image based on a Dockerfile with a Jupyter environment and running a container based on the image.

Download the repository, open a command line in the root of the directory and:

1. Build the image:

docker build . --tag tug-automation-sp-sw-rp

2. Run the image:

docker run -it -p 8888:8888 tug-automation-sp-sw-rp

3. Click on the login link (or copy and paste in the browser) shown in the console to access to a Jupyter environment.

Open the desired Jupyter Notebook (*.ipynb) file. Each notebook contains the used code and its outputs. You can execute the code to reproduce the obtained results.

Common files:

• Dockerfile: a recipe for the computational environment using Docker.
• requirements.txt: file with the dependencies and versions used through all the code.

Notebooks and code files:

• functions: Pythons scripts defining common functions used in the notebooks.
• 01_sensor-data-processing.ipynb: Jupyter Notebook containing all the code used for data processing. It obtains the data from 01_SENSOR-DATA/01_RAW and process it to clean it (stored at 01_SENSOR-DATA/02_CLEAN) and arange it as windows (stored at 01_SENSOR-DATA/03_WINDOWED).
• 02_ml.ipynb: Jupyter Notebook containing all the code used for training the ML models. It loads the data from 01_SENSOR-DATA/03_WINDOWED and uses it to compare the two activities splitting methods and to train the ML models used by the application. The models are stored in 02_ML.

• 03_experiment.ipynb: Jupyter Notebook containing all the analysis performed. It loads the application and manual results from 03_EXPERIMENT/01_INPUT to analyse the reliability of the system. The output of the analysis is stored in 03_EXPERIMENT/02_OUTPUT.
• 04_battery-consumption: Jupyter Notebook containing the battery consumption analysis. It loads the battery consumption records from 04_BATTERY/00_battery-historian.csv to compute the consumption estimates per device and TUG execution, which are stored in 04_BATTERY/01_battery-consumption.csv

Directories and data files:

• 01_SENSOR-DATA:
  • 01_RAW: contains a raw accelerometer and gyroscope data collected from the participants of the study while they were performing the TUG test.
    • sXX: directory containing the raw data obtained from the subject XX. Each directory contains a json file for each TUG execution and for each device. Files have the following naming convention: {subject_id}_{execution}_{sw|sp}.json. It also contains the file sXX_segments.txt, which contains the boundaries between each TUG subphase, manually extracted from video analysis.
    • subjects.csv: information (e.g., age, gender) regarding the participants of the study.
  • 02_CLEAN: contains the processed accelerometer and gyroscope data, where each sample is labelled with an associated activity.
    • 01_TURNING-AND-SITTING: the samples are labelled with the SEATED, STANDING_UP, WALKING, TURNING and SITTING_DOWN activities. Contains a directory for each subject, and each directory has a csv file with the labeled data corresponding to one execution. The csv files follow this format: {subject_id}_{execution}_{sw|sp}.csv
    • 02_TURN-TO-SIT: the samples are labelled with the SEATED, STANDING_UP, WALKING, TURNING and TURN-TO-SIT activities. Contains a directory for each subject, and each directory has a csv file with the labeled data corresponding to one execution. The csv files follow this format: {subject_id}_{execution}_{sw|sp}.csv
    • 01_sp_{acc|gyro}-boundaries.pdf: plots containing accelerometer and gyroscope data and their associated activties. These plots correspond to the Figure 5 of the paper.
  • 03_WINDOWED: contains the windows generated from the clean data.
    • 01_TURNING-AND-SITTING: the windows are labelled with the SEATED, STANDING_UP, WALKING, TURNING and SITTING_DOWN activities. Contains a directory for each subject.
    • 02_TURN-TO-SIT: the windows are labelled with the SEATED, STANDING_UP, WALKING, TURNING and TURN-TO-SIT activities. Contains a directory for each subject.
• 02_ML: contains the ML models trained with the collected data. Contains:
  • 01_splitting-approaches-reports.json: results from models trained with both splitting approaches.
  • 02_splitting-approaches-comparison.csv: comparison analysing the results of both splitting approaches. This information is reported in the Table II of the paper.
  • 03_sp_data_model.tflite: CNN model trained with the data collected from the smartphone's sensors.
  • 03_sw_data_model.tflite: CNN model trained with the data collected from the smartwatch's sensors.
  • 03_labels.txt: activity labels file embedded into models as metadata.
• 03_EXPERIMENT: contains the input and the output of the analysis performed about the results of the systems.
  • 01_INPUT: directory with the inputs of the experiment (i.e., results obtained from the TUG system)
    • sXX: directory containing the experiments results of the subject XX. Each directory contains:
      • sXX_{sp|sw}.json: results obtained from the sw and the sp device.
      • sXX_results.csv: results obtained manually from visual inspection.
  • 02_OUTPUT: directory with the results of the analyses.
    • 01_{c1|c2|man}-results.csv: TUG executions measurements from the system and the manual ones.
    • 02_errors.csv: measurement error of each TUG execution and subphases.
    • 03_execution-status.csv: number of executions classified as success, partial_success and failure. This information is reported in the Table III of the paper.
    • 04_error-distribution.pdf: boxplot with the distribution of the measurement errors. This plot corresponds to the Figure 6 of the paper.
    • 05_subjects-rmse.csv: intra-subject measurements RMSE.
    • 05_comparison-rmse.csv: inter-subject measurements RMSE. This information is reported in the Table IV of the paper.
    • 06_{c1|c2}-duration-ba.pdf: Bland-Altman plots of the total duration of the executions. These plots correspond to the Figure 7 of the paper.
    • 07_{c1|c2}-phases-ba.pdf: Bland-Altman plots of the subphases duration of the executions. These plots correspond to the Figure 8 of the paper.
    • 08_icc-results.csv: ICC_(2,1) reliability metric comparing each system configuration with the manual results. This information is reported in the Table V of the paper.
• 04_BATTERY: contains the system's battery consumption information. Contains:
  • bug-reports: bugreports generated after the execution of the TUG system on the devices. The bugreports have the following naming format: br_{sXX[-sYY]}_{sp|sp-paired|sw}.
  • 00_battery-historian.csv: battery consumption data extracted from the bugreports.
  • 01_battery-consumption.csv: battery consumption information processed from the Battery Historian data. This information is reported in the Table VII of the paper.

The documents in this repository are licensed under Creative Commons Attribution 4.0 International License.

All contained code is licensed under the Apache License 2.0.

All data used in this repository is licensed under Open Data Commons Attribution License.

This work has been funded by the Spanish Ministry of Universities [grants FPU19/05352 and FPU17/03832] and by the Spanish Ministry of Science and Innovation (MCIN/AEI/10.13039/501100011033) and ''ERDF A way of making Europe'' [grants PID2020-120250RB-I00, PID2022-1404475OB-C21 and PID2022-140475OB-C22].