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Related Concept Videos

Conservation of AC Power01:15

Conservation of AC Power

390
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
390
Electrical Energy01:10

Electrical Energy

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Using electric appliances for a longer period of time consumes more electrical energy and results in a higher electric bill. The energy produced by the transfer of electrons from one point to another is known as electrical energy. If power is delivered at a constant rate, the electrical energy can be defined as the product of power used by the device for a period of time. The energy unit on electric bills is the kilowatt-hour, where one kilowatt-hour is equivalent to 3.6 × 106 joules.
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P-N junction01:11

P-N junction

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A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
684
Maximum Power Transfer01:16

Maximum Power Transfer

414
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
414
Power Factor Correction01:20

Power Factor Correction

265
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
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Energy and Power Signals01:17

Energy and Power Signals

592
In an electrical system with a resistor, voltage and current signals facilitate the measurement of power and energy across the resistor. For a continuous-time signal, the total energy over a time interval is defined as the integral of the square of the signal's magnitude over that interval. Mathematically, this is expressed as:
592

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Updated: Sep 13, 2025

Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption
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Energy-Aware Duty Cycle Management for Solar-Powered IoT Devices.

Michael Gerndt1, Mustafa Ispir1, Isaac Nunez1

  • 1Chair of Computer Architecture and Parallel Systems, School of Computation, Information and Technology, Technical University of Munich, 80333 Munich, Germany.

Sensors (Basel, Switzerland)
|July 30, 2025
PubMed
Summary
This summary is machine-generated.

This study ensures continuous operation for solar-powered IoT devices by intelligently adjusting their duty cycles based on predicted solar energy availability. This proactive adaptation guarantees uninterrupted IoT application performance, even during periods of low energy. Keywords: IoT devices, solar energy, duty cycle, continuous operation.

Keywords:
computing continuumduty cycleenergy harvestinginternet of thingsserverless

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Area of Science:

  • Electrical Engineering
  • Computer Science
  • Sustainable Energy

Background:

  • Internet of Things (IoT) devices often operate off-grid, relying on batteries and energy harvesting.
  • Limited battery life necessitates efficient power management for continuous IoT operation.

Purpose of the Study:

  • To develop a method for automatically adapting IoT device duty cycles to predicted solar energy.
  • To guarantee continuous operation of IoT applications in energy-constrained environments.

Main Methods:

  • Integration of a low-cost solar control board with the Serverless IoT Framework (SIF).
  • Implementation of an event-based programming paradigm for microcontrollers.
  • Proactive adaptation of IoT device sleep time based on predicted solar energy (e.g., cloudy days).

Main Results:

  • Demonstrated a system for dynamically managing IoT device power consumption.
  • Successfully guaranteed continuous operation through predictive duty cycle adjustments.
  • Validated the approach in a case study involving predicted adverse weather conditions.

Conclusions:

  • Adaptive duty cycle control is effective for ensuring reliable IoT device operation with solar energy.
  • The SIF framework facilitates event-driven power management for IoT.
  • Proactive energy management is crucial for sustainable, off-grid IoT deployments.