Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Video

Updated: Jul 17, 2026

Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis

Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis

Published on: September 27, 2019

RayWatch: Hemispherical Diffusion on Wrist UV Sensor for Indoor-Outdoor Sensing.

Harrison Dong^1,2, Glenn Fernandes^1,2, Christopher Romano^1,2

¹Department of Computer Science, Northwestern University, Evanston, IL, USA.

... International Conference on Wearable and Implantable Body Sensor Networks. International Conference on Wearable and Implantable Body Sensor Networks

|July 16, 2026

Summary

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same authorSame journal

HealthSense: Unobtrusive Continuous Stress Monitoring Using a Novel Dual ECG-PPG Patch.

... International Conference on Wearable and Implantable Body Sensor Networks. International Conference on Wearable and Implantable Body Sensor Networks·2026

Same author

Clinicopathological and follow-up features of coexisting medullary and papillary thyroid cancer.

BMC cancer·2026

Same author

Evaluation of Energy and Nutrient Estimates from Large Language Models Using Text-Based Queries.

The Journal of nutrition·2026

Same author

A novel prognostic index predicts outcome of diffuse large B-cell lymphoma patients treated with R-CHOP immunochemotherapy.

Annals of hematology·2026

Same author

Achieving High Capacity in Nickel-Rich Cathodes via Low-Voltage Lithium Storage Expansion.

Small (Weinheim an der Bergstrasse, Germany)·2026

Same author

iSCORE-PD: an isogenic stem cell collection to research Parkinson's disease.

Nature communications·2026

A new UV-monitoring watch uses a special dome and machine learning to accurately detect outdoor sun exposure. This technology aims to provide timely protection cues, reducing melanoma risk.

Area of Science:

Biomedical Engineering
Wearable Technology
Photodetection

Background:

Excessive ultraviolet (UV) radiation exposure is a primary cause of melanoma.
Current wrist-worn UV monitors lack accuracy due to variations in sensor angle and wrist orientation.
Timely, context-aware UV protection alerts are crucial for at-risk individuals.

Purpose of the Study:

To develop a novel wrist-worn device for accurate UV context sensing.
To improve the reliability of UV monitoring by stabilizing sensor angular response.
To enable personalized interventions for reducing cumulative UV exposure.

Main Methods:

Developed a wrist-watch device with a UV photodiode under a hemispherical polytetrafluoroethylene (PTFE) dome.
Collected over 93,000 indoor/outdoor data points from 10 participants wearing the device during daily activities.

More Related Videos

Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb

Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb

Published on: December 2, 2017

A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering

A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering

Published on: December 7, 2016

Related Experiment Videos

Last Updated: Jul 17, 2026

Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis

Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis

Published on: September 27, 2019

Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb

Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb

Published on: December 2, 2017

A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering

A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering

Published on: December 7, 2016

Implemented an on-device logistic-regression classifier using UVA, UVB, and inertial sensor data.

Main Results:

The PTFE-dome watch achieved 94% accuracy and a 0.95 F1 score in distinguishing indoor/outdoor contexts.
This performance significantly outperformed a flat-window sensor (71% accuracy, F1=0.72) and a cylindrical-PTFE enclosure (84% accuracy, F1=0.85).
Leave-one-participant-out cross-validation confirmed the system's robust performance.

Conclusions:

The developed PTFE-dome watch provides reliable on-wrist UV context sensing.
On-device machine learning enhances the accuracy of UV exposure monitoring.
This technology offers a pathway for unobtrusive interventions to mitigate UV-related health risks.