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  2. 9 Waterproof Earbuds for Everything From Swimming to Sweaty ...

    www.aol.com/9-best-waterproof-headphones...

    For whichever sweaty, water-logged places you find yourself, here are the 9 best waterproof earbuds and headphones—with MP3 storage, Bluetooth, or both.

  3. The top 5 worries — and 5 worst sleep habits — that are ...

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    September 25, 2024 at 4:30 AM. The top 5 worries — and 5 worst sleep habits — that are keeping Americans up at night. One in five polled Americans say they "rarely or never" wake up feeling ...

  4. These Waterproof Earbuds Are a Must-Have for Your Beach ... - AOL

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    From work calls to long runs, it's important to use quality waterproof earbuds and headphones. Shop these 8 waterproof options for daily use.

  5. Sleep deprivation - Wikipedia

    en.wikipedia.org/wiki/Sleep_deprivation

    Treatment. Cognitive behavioral therapy, caffeine (to induce alertness), sleeping pills. Sleep deprivation, also known as sleep insufficiency[2] or sleeplessness, is the condition of not having adequate duration and/or quality of sleep to support decent alertness, performance, and health. It can be either chronic or acute and may vary widely in ...

  6. Headphones - Wikipedia

    en.wikipedia.org/wiki/Headphones

    Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby ...

  7. Good cover (algebraic topology) - Wikipedia

    en.wikipedia.org/wiki/Good_cover_(algebraic...

    In mathematics, an open cover of a topological space is a family of open subsets such that is the union of all of the open sets. A good cover is an open cover in which all sets and all non-empty intersections of finitely-many sets are contractible ( Petersen 2006 ). The concept was introduced by André Weil in 1952 for differentiable manifolds ...

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