Have you ever made a great catch—like saving a phone from dropping into a toilet or catching an indoor cat from running outside? Those skills—the ability to grab a moving object—takes precise interactions within and ...
Jun 5, 2023
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Engineers at the University of California San Diego have developed a simple, low-cost clip that uses a smartphone's camera and flash to monitor blood pressure at the user's fingertip. The clip works with a custom smartphone ...
May 29, 2023
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The heart is an electromechanical organ whose functioning can be captured in the form of electrical voltage pulses, calcium ion waves, and mechanical contractions. Inherited conditions, stress, drugs, or aging can lead to ...
Jan 11, 2023
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Japan's population is rapidly aging. As a result, new challenges have emerged as an increased number of elderly people, many of whom live in isolated parts of the country, need medical and nursing care despite inadequate ...
Dec 13, 2022
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Regular screening is one of the most important ways to prevent colorectal cancer (colon and rectal).
Dec 8, 2022
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Monitoring blood pressure using a digital camera could soon be the norm, thanks to an innovative technique demonstrated by Australian and Iraqi researchers.
Dec 5, 2022
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In an effort to streamline the process of diagnosing patients with multiple sclerosis and Parkinson's disease, researchers used digital cameras to capture changes in gait—a symptom of these diseases—and developed a machine-learning ...
Oct 11, 2022
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Reach out right now and touch anything around you. Whether it was a key on your keyboard, the wood of your desk, or the fur of your dog, you felt it the instant your finger contacted it. Or did you?
Oct 7, 2022
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Findings from a pilot study published today in the American Journal of Infection Control (AJIC) suggest that portable thermal imaging cameras might provide a new approach to assessing and improving hand-hygiene practices ...
Sep 15, 2022
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Esophageal intubation describes the unintended insertion of a breathing tube into the esophagus (the tube leading to the stomach) instead of the windpipe (trachea). If this is not promptly recognized it causes brain damage ...
Aug 18, 2022
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A camera is a device that records images, either as a still photograph or as moving images known as videos or movies. The term comes from the camera obscura (Latin for "dark chamber"), an early mechanism of projecting images where an entire room functioned as a real-time imaging system; the modern camera evolved from the camera obscura.
Cameras may work with the light of the visible spectrum or with other portions of the electromagnetic spectrum. A camera generally consists of an enclosed hollow with an opening (aperture) at one end for light to enter, and a recording or viewing surface for capturing the light at the other end. A majority of cameras have a lens positioned in front of the camera's opening to gather the incoming light and focus all or part of the image on the recording surface. The diameter of the aperture is often controlled by a diaphragm mechanism, but some cameras have a fixed-size aperture.
A typical still camera takes one photo each time the user presses the shutter button. A typical movie camera continuously takes 24 film frames per second as long as the user holds down the shutter button.
This text uses material from Wikipedia, licensed under CC BY-SA
