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Related Concept Videos

Line Loss01:10

Line Loss

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The different configurations of source-load connections include wye (star) and delta connections. The relationship between line and phase voltages and currents varies depending on the configuration. When the source is supplying power, it is transmitted through the wires to the load, and during this transmission, some power is absorbed by the wires, leading to line loss.
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Weighted Mean00:57

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While taking the arithmetic, geometric, or harmonic mean of a sample data set, equal importance is assigned to all the data points. However, all the values may not always be equally important in some data sets. An intrinsic bias might make it more important to give more weightage to specific values over others.
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Reducing Line Loss01:18

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In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
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Atomic Weight01:25

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Protons and neutrons have approximately the same mass, about 1.67 × 10-24 grams. Scientists arbitrarily define this amount of mass as one atomic mass unit (amu) or one Dalton. Electrons are much smaller in mass than protons, weighing only 9.11 × 10-28 grams, or about 1/1800 of an atomic mass unit. As a result, they do not contribute much to an element's overall atomic mass. This means that, when considering atomic mass, it is customary to ignore the mass of any electrons and...
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Mass and Weight01:19

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Mass and weight are often used interchangeably in everyday conversation. For example,  medical records often show our weight in kilograms, but never in the correct units of newtons. In physics, however, there is an important distinction. Weight is the pull of the Earth on an object. It depends on the distance from the center of the Earth. Weight dramatically varies if we leave the Earth's surface, unlike mass, which does not vary with location. On the Moon, for example, the...
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Apparent Weight01:09

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True weight is the measure of the gravitational force acting on an object. However, if the object accelerates, its measured weight is different from its true weight. Similar observations can be made when the object is submerged in water. An object's weight in water is its apparent weight, which is equal to the difference between its true weight and the buoyant forces.
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Related Experiment Video

Updated: Feb 8, 2026

Breakfast Habits among Schoolchildren in the City of Uruguaiana, Brazil
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Using the Habit App for Weight Loss Problem Solving: Development and Feasibility Study.

Sherry Pagoto1, Bengisu Tulu2, Emmanuel Agu3

  • 1Institute for Collaboration on Health, Intervention, and Policy, Department of Allied Health Sciences, University of Connecticut, Storrs, CT, United States.

JMIR Mhealth and Uhealth
|June 22, 2018
PubMed
Summary
This summary is machine-generated.

The Habit app, an automated problem-solving therapy for weight loss, demonstrated feasibility and acceptability in pilot studies. While participants achieved significant weight loss, the app did not improve problem-solving skills.

Keywords:
mHealthmobile appobesityproblem solvingweight loss

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Area of Science:

  • Behavioral Science
  • Mobile Health (mHealth)
  • Obesity Treatment

Background:

  • Mobile weight loss apps often lack evidence-based features, relying on low-adherence self-monitoring.
  • Problem-solving therapy (PST) is effective for adherence and motivation in behavioral interventions but underutilized in weight loss apps.
  • PST has been successfully integrated into depression mobile apps.

Purpose of the Study:

  • To develop and assess the feasibility and acceptability of the Habit app, designed to automate PST for weight loss.
  • To evaluate the Habit app's usability, retention, and user engagement.
  • To explore changes in problem-solving skills and weight following an 8-week intervention.

Main Methods:

  • Two iterative single-arm pilot studies involving adults who were overweight or obese.
  • An 8-week intervention combining the Habit app with support from a private Facebook group.
  • Feasibility outcomes included retention, app usage, usability, and acceptability; weight and problem-solving skills were assessed at 8 and 16 weeks.

Main Results:

  • The Habit app showed acceptable usage (2-3 times/week) and mixed acceptability regarding diet solutions and habit reminders.
  • Participants achieved statistically significant weight loss in both pilot studies (P=.005 and P=.03).
  • No significant improvement in problem-solving skills was observed in either pilot study (P=.62 and P=.27).

Conclusions:

  • Automated PST via the Habit app is a feasible approach for mobile weight loss interventions.
  • While effective for weight loss, automated PST delivery may not enhance problem-solving skills as human-delivered therapy does.
  • Further research is needed to optimize automated PST for improving behavioral coping strategies in weight management.