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

Buoyancy and Stability for Submerged and Floating Bodies01:11

Buoyancy and Stability for Submerged and Floating Bodies

In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...
Buoyancy01:12

Buoyancy

When an object is placed in a fluid, it either floats or sinks. All objects in a fluid experience a buoyant force. For example, a metal ball sinks, while a rubber ball floats. Similarly, a submarine can sink and float by adjusting its buoyancy.  The concept of buoyancy raises several interesting questions. For instance, where does this buoyant force come from? How much buoyant force is required to make an object sink or float? Do objects that sink get any support at all from the fluid? 
To get...
Nightmares and Night Terrors01:18

Nightmares and Night Terrors

Nightmares and night terrors represent two distinct types of sleep disturbances that differ in timing, characteristics, and the sleeper's recall of the event. Nightmares are vivid, disturbing dreams that usually awaken the sleeper from REM sleep, a stage of sleep where brain activity is high, and dreams are most frequent. Upon awakening, individuals often have detailed recollections of their nightmares, which can include themes of threats to survival, security, or self-esteem.
Nightmares often...
Quality of Water01:19

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...

You might also read

Related Articles

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

Sort by
Same author

Major Depression and Antidepressant Treatment: Impact on Pregnancy and Neonatal Outcomes.

Focus (American Psychiatric Publishing)·2026
Same author

Factors Associated With Pre-donation Health-related Quality-of-Life Among Pediatric Sibling Hematopoietic Cell Donors: A DonorKids QL Study.

Transplantation and cellular therapy·2026
Same author

Brief report: Meth, tranq, gas station heroin & other drugs complicating addiction treatment.

The American journal on addictions·2026
Same author

Moving Beyond Unintended Pregnancy: Development of a Person-Centered Conceptual Framework and Measure of Self-Assessed Pregnancy Acceptability.

Studies in family planning·2026
Same author

Barriers to Buprenorphine Initiation in Patients Using Fentanyl.

JAMA network open·2026
Same author

Donation-related decision-making among young adult Black and Hispanic members of a hematopoietic stem cell donor registry: A qualitative study.

SSM. Qualitative research in health·2025

Related Experiment Video

Updated: Jun 21, 2026

A Low-Cost Method of Measuring the In Situ Primary Productivity of Periphyton Communities of Lentic Waters
06:02

A Low-Cost Method of Measuring the In Situ Primary Productivity of Periphyton Communities of Lentic Waters

Published on: December 16, 2022

Residents' perceptions of a night float system.

Harish Jasti1, Barbara H Hanusa, Galen E Switzer

  • 1Division of General Internal Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA. jastih@upmc.edu

BMC Medical Education
|August 5, 2009
PubMed
Summary

Residents perceive improved patient care quality with Night Float (NF) systems, despite concerns about reduced educational emphasis. This system supports physician well-being and the 80-hour workweek.

More Related Videos

Developing a Virtual Reality Video Game to Simulate Rip Currents
08:37

Developing a Virtual Reality Video Game to Simulate Rip Currents

Published on: July 16, 2020

Related Experiment Videos

Last Updated: Jun 21, 2026

A Low-Cost Method of Measuring the In Situ Primary Productivity of Periphyton Communities of Lentic Waters
06:02

A Low-Cost Method of Measuring the In Situ Primary Productivity of Periphyton Communities of Lentic Waters

Published on: December 16, 2022

Developing a Virtual Reality Video Game to Simulate Rip Currents
08:37

Developing a Virtual Reality Video Game to Simulate Rip Currents

Published on: July 16, 2020

Area of Science:

  • Medical Education
  • Healthcare Administration
  • Patient Safety

Background:

  • Increasing concerns regarding resident work hours have led to the implementation of Night Float (NF) systems.
  • The study investigates resident perceptions of NF systems.

Purpose of the Study:

  • To examine resident perceptions of a Night Float (NF) system.
  • To compare NF rotations with regular call months regarding patient care, education, and satisfaction.

Main Methods:

  • A 115-item questionnaire was administered to Internal Medicine housestaff (post-graduate years 1-3) at the University of Pittsburgh.
  • The questionnaire assessed perceptions of NF rotations versus regular call months across key domains.

Main Results:

  • A 90% response rate was achieved (n=149).
  • Residents perceived improved patient care quality (41% agreed) and better care from rested physicians (46% agreed) during NF.
  • A majority felt NF reduced educational emphasis (65%) and increased service focus (52%), with 83% feeling more rested and 77% supporting the 80-hour workweek.

Conclusions:

  • Housestaff perceive that Night Float (NF) systems enhance overall patient care quality.
  • The combination of improved care from rested physicians and decreased educational focus during NF has significant implications for resident training.