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Related Concept Videos

Power01:08

Power

The concept of work involves force and displacement; meanwhile, the work-energy theorem relates the net work done on a body to the difference in its kinetic energy, calculated between two points on its trajectory. While none of these quantities or relations involves time explicitly, we know that the time available to accomplish work is often just as important as the amount of work itself. For example, sprinters in a race may have achieved the same velocity at the finish, therefore,...
Complex Power01:14

Complex Power

Power engineers have introduced the concept of complex power to determine the cumulative effect of parallel loads. This idea plays a crucial role in power analysis because it encompasses all the details related to the power consumed by a specific load.
Complex power is defined as the multiplication of the voltage and the complex conjugate of the current. The magnitude of this power, known as apparent power, is measured in volt-amperes (VA). Notably, the angle of the complex power equates to the...
Power and Energy01:12

Power and Energy

The power and energy delivered to an element are subjects of great significance in the field of electrical engineering. It is a well-known fact that a 100-watt light bulb emits more light than a 60-watt one. Therefore, power and energy calculations play a crucial role in the analysis of electrical circuits.
Power, defined as the time rate of expending or absorbing energy, is quantified in units called watts (W). The relation between power and energy is mathematically given as
Instantaneous Power01:22

Instantaneous Power

Instantaneous power is important in electrical circuits, mainly when dealing with sinusoidal input. Instantaneous power, denoted as p(t), results from the multiplication of the instantaneous voltage (v(t)) across an element and the instantaneous current (i(t)) flowing through it. This relationship adheres to the passive sign convention and represents a fundamental principle in electrical engineering.
Structuralism01:26

Structuralism

Structuralism, an early psychological theory developed by Wilhelm Wundt and his student Edward Bradford Titchener, sought to dissect the human mind into its most fundamental components. Wundt's groundbreaking work in his laboratory set the stage for Titchener to define structuralism's goal as cataloging the "atoms" of the mind—sensations, images, and feelings—akin to how chemists identify elements of matter.
Titchener's approach to structuralism was unique. He employed introspection, a method...
Conservation of AC Power01:15

Conservation of AC Power

The principle of power preservation is applicable to both ac and dc circuits. This principle, when applied to AC power, asserts that the complex, real, and reactive powers produced by the source are equal to the total complex, real, and reactive powers absorbed by the loads. When two load impedances are connected in parallel to an ac source V, the complex power provided by the source can be calculated using the relation

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Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion
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Published on: February 5, 2020

Power as a structural phenomenon.

Jennifer Watling Neal1, Zachary P Neal

  • 1Department of Psychology, Michigan State University, 127A Psychology Building, East Lansing, MI 48824, USA. jneal@msu.edu

American Journal of Community Psychology
|September 18, 2010
PubMed
Summary
This summary is machine-generated.

This study offers a structural definition of power, focusing on resource exchange relationships. A new measurement method is proposed to aid empowerment research and practice.

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Area of Science:

  • Community Psychology
  • Social Psychology
  • Sociology

Background:

  • Existing theories of power (social, psychopolitical, relational) lack a unified structural definition.
  • A need exists for a parsimonious conception of power grounded in relational structures.

Purpose of the Study:

  • To propose a structural conception of power based on resource exchange patterns.
  • To develop a method for measuring this structural conception of power.
  • To discuss implications for empowerment theory, research, and practice.

Main Methods:

  • Analysis of dominant power conceptions in community psychology.
  • Identification of common features across different power theories.
  • Application of social exchange theory for measurement development.

Main Results:

  • A streamlined, structural conception of power derived from relationship patterns.
  • A proposed method for measuring structural power.
  • Identification of implications for empowerment processes and outcomes.

Conclusions:

  • A structural conception of power offers a more precise framework for research.
  • The proposed measurement method can enhance the study and facilitation of empowerment.
  • Understanding structural power is crucial for effective empowerment interventions.