Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Wave Parameters01:10

Wave Parameters

9.7K
The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...
9.7K
Effective Value of a Periodic Waveform01:07

Effective Value of a Periodic Waveform

1.4K
The concept of effective value, the root mean square (RMS) value, is crucial in understanding electrical circuits and power delivery. This idea emerges from the necessity to measure the effectiveness of a voltage or current source in supplying power to a resistive load.
The effective value of a periodic current represents the direct current (DC) that conveys the same average power to a resistor as the periodic current itself. This concept is crucial when assessing AC circuits. To determine the...
1.4K
Reflection of Waves01:07

Reflection of Waves

4.8K
When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...
4.8K
Graphing the Wave Function01:13

Graphing the Wave Function

3.3K
Consider the wave equation for a sinusoidal wave moving in the positive x-direction. The wave equation is a function of both position and time. From the wave equation, two different graphs can be plotted.
3.3K
Standing Waves01:17

Standing Waves

5.8K
Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
5.8K
Sound Waves01:01

Sound Waves

13.7K
Sound waves can be thought of as fluctuations in the pressure of a medium through which they propagate. Since the pressure also makes the medium's particles vibrate along its direction of motion, the waves can be modeled as the displacement of the medium's particles from their mean position.
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well....
13.7K

You might also read

Related Articles

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

Sort by
Same author

An Open-source Toolbox for Analysing and Processing PhysioNet Databases in MATLAB and Octave.

Journal of open research software·2015
Same author

Robust detection of heart beats in multimodal data.

Physiological measurement·2015
Same author

Noninvasive Fetal ECG: the PhysioNet/Computing in Cardiology Challenge 2013.

Computing in cardiology·2014
Same author

Non-invasive fetal ECG analysis.

Physiological measurement·2014
Same author

A physiological time series dynamics-based approach to patient monitoring and outcome prediction.

IEEE journal of biomedical and health informatics·2014
Same author

Accessing the public MIMIC-II intensive care relational database for clinical research.

BMC medical informatics and decision making·2013

Related Experiment Video

Updated: Mar 30, 2026

Large-scale Scanning Transmission Electron Microscopy Nanotomy of Healthy and Injured Zebrafish Brain
10:09

Large-scale Scanning Transmission Electron Microscopy Nanotomy of Healthy and Injured Zebrafish Brain

Published on: May 25, 2016

11.6K

LightWAVE: Waveform and Annotation Viewing and Editing in a Web Browser.

George B Moody1

  • 1Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.

Computing in Cardiology
|November 4, 2015
PubMed
Summary

This paper introduces LightWAVE, open-source software for viewing physiologic waveforms and annotations. It enables efficient annotation creation and modification for research data collection.

More Related Videos

Three and Four-Dimensional Visualization and Analysis Approaches to Study Vertebrate Axial Elongation and Segmentation
12:59

Three and Four-Dimensional Visualization and Analysis Approaches to Study Vertebrate Axial Elongation and Segmentation

Published on: February 28, 2021

4.3K
Author Spotlight: Automated Lifespan Monitoring – Discovering Aging Dynamics with the Lifespan Machine
08:53

Author Spotlight: Automated Lifespan Monitoring – Discovering Aging Dynamics with the Lifespan Machine

Published on: January 26, 2024

1.8K

Related Experiment Videos

Last Updated: Mar 30, 2026

Large-scale Scanning Transmission Electron Microscopy Nanotomy of Healthy and Injured Zebrafish Brain
10:09

Large-scale Scanning Transmission Electron Microscopy Nanotomy of Healthy and Injured Zebrafish Brain

Published on: May 25, 2016

11.6K
Three and Four-Dimensional Visualization and Analysis Approaches to Study Vertebrate Axial Elongation and Segmentation
12:59

Three and Four-Dimensional Visualization and Analysis Approaches to Study Vertebrate Axial Elongation and Segmentation

Published on: February 28, 2021

4.3K
Author Spotlight: Automated Lifespan Monitoring – Discovering Aging Dynamics with the Lifespan Machine
08:53

Author Spotlight: Automated Lifespan Monitoring – Discovering Aging Dynamics with the Lifespan Machine

Published on: January 26, 2024

1.8K

Area of Science:

  • Biomedical Engineering
  • Computational Biology
  • Medical Informatics

Background:

  • Physiologic waveform data, including electrocardiograms (ECGs), are crucial for medical research.
  • Efficient tools for viewing, annotating, and managing these signals are essential for data analysis and collection.
  • Existing software may lack flexibility or ease of use for interactive annotation tasks.

Purpose of the Study:

  • To describe LightWAVE, a novel open-source software solution for visualizing and annotating physiologic waveforms.
  • To highlight LightWAVE's capabilities for interactive creation and modification of annotations, facilitating research data collection.
  • To present the software's modular architecture, enabling extensibility and customization.

Main Methods:

  • LightWAVE employs a client-server architecture with a C-based CGI back end for data retrieval and a JavaScript-based web application front end.
  • Data are accessed from PhysioNet's PhysioBank archives or similarly structured repositories.
  • A Perl-based CGI application, 'scribe,' handles the recording of user annotations.

Main Results:

  • LightWAVE provides an efficient, interactive platform for viewing ECGs and other physiologic signals.
  • The software supports the creation and modification of event markers (annotations) essential for research.
  • Its open-source nature and modular design allow for easy enhancement and integration.

Conclusions:

  • LightWAVE offers a flexible and accessible solution for researchers working with physiologic waveform data.
  • The software streamlines the process of building and refining research datasets through interactive annotation.
  • Its web-based, no-installation design enhances accessibility across various devices and platforms.