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An image from a part of a digital orthophoto quadrangle of Washington, DC. A digital orthophoto quadrangle [1] (DOQ) is aerial photography or satellite imagery that has been corrected so that its pixels are aligned with longitude and latitude lines, and have a narrowly defined region of coverage.
From approximately 1947–1992, the USGS produced the 7.5 minute series, with each map covering an area one-quarter of the older 15-minute quad series, which it replaced. [1] A 7.5 minute quadrangle map covers an area of 49 to 70 square miles (130 to 180 km 2 ). [ 2 ]
A quad antenna is a type of directional wire radio antenna used on the HF and VHF bands. A quad is a Yagi–Uda antenna ("Yagi") made from loop elements instead of dipoles: It consists of a driven element and one or more parasitic elements; however in a quad, each of the loop elements may be square, round
The M65 atomic cannon, often called Atomic Annie, [6]: 92 was an artillery piece built by the United States and capable of firing a nuclear device. It was developed in the early 1950s, at the beginning of the Cold War; and fielded between April 1955 and December 1962, in West Germany, South Korea and on Okinawa.
A normal A–a gradient for a young adult non-smoker breathing air, is between 5–10 mmHg. Normally, the A–a gradient increases with age. For every decade a person has lived, their A–a gradient is expected to increase by 1 mmHg. A conservative estimate of normal A–a gradient is [age in years + 10]/ 4.
According to Jason Turowski, MD of the Cleveland Clinic, "We are designed to breathe through our noses from birth — it’s the way humans have evolved." [9] This is because it is the job of the nose to filter out all of the particles that enter the body, as well as to humidify the air we breathe and warm it to body temperature.
The Hager House and Museum in Hagerstown City Park was once home to the city's founder, Jonathan Hager.. In 1739, Jonathan Hager, a German immigrant from Pennsylvania and a volunteer Captain of Scouts, purchased 200 acres (81 ha) of land in the Great Appalachian Valley between the Blue Ridge and Allegheny Mountains in Maryland and called it Hager's Fancy.
The University of California, Los Angeles (UCLA) [1] is a public land-grant research university in Los Angeles, California, United States.Its academic roots were established in 1881 as a normal school then known as the southern branch of the California State Normal School which later evolved into San José State University.