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Related Concept Videos

Electrical Current01:10

Electrical Current

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Electrical current is defined as the rate at which charge flows. When there is a large current present, such as that used to run a refrigerator, a large amount of charge moves through the wire in a small amount of time. If the current is small, such as that used to operate a handheld calculator, a small amount of charge moves through the circuit over a long period of time. The SI unit for current is the ampere (A), named for the French physicist André-Marie Ampère (1775–1836).
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A displacement current is analogous to a real current in Ampère's law, participating in Ampère's law the same way as the usual conduction current. However, it is produced by a changing electric field. Displacement current is defined in terms of a time-varying electric field, and also has an associated displacement current density. By adding a term accounting for displacement current, Maxwell modified the existing Ampère's law, which is now called generalized Ampère's law.
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Current trends in nursing include:
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Current Trends in Nursing II01:30

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Trends in nursing are multifactorial and associated with changes in society, within the nursing profession, and in other professions. Notably, telehealth and remote nursing contribute to successful healthcare delivery for numerous patients and help reduce stress for nurses due to nursing shortages. Nurses can reach patients, monitor their conditions, and interact with them using computers, audio, visual accessories, and telephones—for example, remote patient monitoring systems. Likewise,...
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Electric charge is the most fundamental quantity in an electric circuit. The effects of electric charge are encountered daily, such as when a wool sweater sticks to the human body or when a person receives a shock while walking on a carpet.
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In parallel electrical connections, resistors are linked between the same pair of nodes, creating an equal voltage across each resistor. Kirchhoff's current law is applied to these connections, establishing that the sum of currents through these resistors equals the source current. Utilizing Ohm's law, the source current is determined as the product of the source voltage and the sum of the reciprocals of individual resistances. This relationship simplifies the process of finding the current...
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Related Experiment Video

Updated: Jan 25, 2026

Visualizing Efficacy of Pesticides Against Disease Vector Mosquitoes in the Field
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Visualizing Efficacy of Pesticides Against Disease Vector Mosquitoes in the Field

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[Invasive mosquitoes in Switzerland: current situation].

Daniel Cherix1

  • 1Département d'écologie et d'évolution, Université de Lausanne, Biophore, 1015 Lausanne.

Revue Medicale Suisse
|May 4, 2019
PubMed
Summary

Switzerland faces increasing threats from invasive mosquitoes like the tiger mosquito, a known vector for diseases such as dengue and Zika. While currently no outbreaks have occurred, authorities are actively monitoring and managing these alien species.

Area of Science:

  • Medical entomology
  • Invasive species ecology
  • Public health

Background:

  • Switzerland has identified three invasive alien mosquito species: Aedes albopictus (tiger mosquito), Ae. japonicus (Japanese mosquito), and Ae. koreicus (Korean mosquito).
  • Aedes albopictus, detected in Ticino in 2003 and north of the Alps since 2013, is a significant concern due to its role as a vector for dengue fever, chikungunya, and Zika virus.

Purpose of the Study:

  • To report the presence and spread of invasive alien mosquito species in Switzerland.
  • To highlight the public health risks associated with Aedes albopictus.
  • To outline the national monitoring and management strategies implemented by Swiss authorities.

Main Methods:

  • Surveillance and monitoring programs established by the Swiss Confederation.

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Related Experiment Videos

Last Updated: Jan 25, 2026

Visualizing Efficacy of Pesticides Against Disease Vector Mosquitoes in the Field
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  • Collaboration between expert groups and cantonal health authorities.
  • Ongoing tracking of invasive mosquito populations and their geographical expansion.

    • Main Results:

    • Aedes albopictus has established populations in Switzerland and is spreading.
    • The tiger mosquito is capable of transmitting serious arboviral diseases.
    • No dengue or chikungunya epidemics have been reported in Switzerland to date.

    Conclusions:

    • Invasive alien mosquitoes, particularly Aedes albopictus, pose a growing threat to public health in Switzerland.
    • Proactive monitoring and control measures are crucial for mitigating the risk of vector-borne disease transmission.
    • International cooperation and coordinated surveillance are essential given the cross-border nature of invasive species.