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Mosquito coil Mosquito coil. A mosquito coil is a mosquito-repelling incense, usually made into a spiral, and typically made using dried paste of pyrethrum powder. The coil is usually held at the center of the spiral, suspending it in the air, or wedged by two pieces of fireproof netting to allow continuous smoldering.
They are distinct from holsters, in allowing use of the device while in the case, but in many instances include a belt clip or other device giving it the functionality of a holster. They are made of plastic, rubber, silicone, leather, or adhesive-backed vinyl pieces. Vinyl material may be calendered or cast, with the latter being more expensive.
Using a mosquito net; Wearing long clothing that covers the skin and is tucked in to seal up holes [79] Avoiding the outdoors during dawn and dusk, when mosquitos are most active [79] Keeping air moving to prevent mosquitos from landing, such as by using a fan [79] Wearing light-colored clothing (light objects are harder for mosquitos to detect ...
Wide, flat coil shapes are usually used, to increase coupling. [77] Ferrite "flux confinement" cores can confine the magnetic fields, improving coupling and reducing interference to nearby electronics, [77] [79] but they are heavy and bulky so small wireless devices often use air-core coils.
Metofluthrin is used in a variety of consumer products, called emanators, for indoor and outdoor use. [3] [4] These products produce a vapor that protects an individual or area. Effectiveness is reduced by air movement. Metofluthrin is neurotoxic, and is not meant to be applied directly to human skin. [5]
A laptop case with visible copper electromagnetic interference (EMI) coating shield on the inside. Such coatings are usually deposited by using electroless plating. It is applied both to home appliances and medical devices. [1] Typical materials used for electromagnetic shielding include thin layer of metal, sheet metal, metal screen, and metal ...
All high-power inductive charging systems use resonated primary and secondary coils. These systems work in the long wave range with frequencies up to 130 kHz. The use of short wave frequencies can enhance the system's efficiency and size [6] but would eventually transmit the signal worldwide.
Apple released two chargers using the MagSafe standard in 2020: the MagSafe Charger, which is a single charging pad for iPhone, and the MagSafe Duo Charger, which is a charging mat with both MagSafe and an Apple Watch charger. [2] Apple has also licensed the MagSafe standard to third parties to develop chargers and cases.
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