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[45] [failed verification] UVC is the highest-energy, most-dangerous type of ultraviolet radiation, and causes adverse effects that can variously be mutagenic or carcinogenic. [46] Despite the importance of the sun to vitamin D synthesis, it is prudent to limit the exposure of skin to UV radiation from sunlight [47] and from tanning beds. [48]
The FCC has restricted the frequencies allowed for medical treatment, and most machines in the US use 27.12 MHz. [26] Shortwave diathermy can be applied in either continuous or pulsed mode. The latter came to prominence because the continuous mode produced too much heating too rapidly, making patients uncomfortable.
The Children’s Health Insurance Program was created in 1997 and reauthorized in 2009. Known as CHIP, the program was enacted following the 1994 failure of national health reform. The purpose of CHIP was to expand health insurance coverage for targeted, uninsured, low-income children with family incomes below 200 percent of the federal poverty ...
Disability rights organizations, such as the Bazelon Center for Mental Health Law, oppose placement in such programs and call into question the appropriateness and efficacy of such group placements, the failure of such programs to address problems in the child's home and community environment, the limited or no mental health services offered ...
The UV index is a number linearly related to the intensity of sunburn-producing UV radiation at a given point on the Earth's surface. It cannot be simply related to the irradiance (measured in W / m 2 ) because the UV of greatest concern occupies a spectrum of wavelengths from 295 to 325 nm, and shorter wavelengths have already been absorbed a ...
UV radiation at 185 nm is used to generate ozone. The UV lamps for water treatment consist of specialized low-pressure mercury-vapor lamps that produce ultraviolet radiation at 254 nm, or medium-pressure UV lamps that produce a polychromatic output from 200 nm to visible and infrared energy. The UV lamp never contacts the water; it is either ...
The Program takes viewers right to the halls of the institution in rural Ogdensburg, N.Y. as Kubler and her classmates walk through Ivy Ridge. They visit the room where they spent hours on old ...
Ultraviolet (UV) radiation is ionizing in its shortest wavelengths but is not penetrating, so it can be shielded by thin opaque layers such as sunscreen, clothing, and protective eyewear. Protection from UV is simpler than for the other forms of radiation above, so it is often considered separately.