A sensitive DC SQUID magnetometer able to discriminate changes as small as one quantum, or about 2 Wb, is used to monitor the gyroscope.

There are two main types of SQUID: direct current ( DC ) and radio frequency ( RF ).

Diagram of a DC SQUID.

represents the magnetic flux threading the DC SQUID loop.

Since the current-voltage characteristics of the DC SQUID is hysteretic, a shunt resistance, is connected across the junction to eliminate the hysteresis ( in the case of copper oxide based high temperature superconductors the junction's own intrinsic resistance is usually sufficient ).

It is less sensitive compared to DC SQUID but is cheaper and easier to manufacture in smaller quantities.

The resulting sequence, " Jack Jawbreaker Fights Crime !," was a devastating satire of Jerry Siegel and Joe Shuster's notorious exploitation by DC Comics over Superman.

The DC Comics character Boodikka, a member of the Green Lantern Corps, was named after Boudica.

* Colonial ( PRR train ), a Pennsylvania Railroad ran between Washington, DC and New York City, and was last operated in 1973 by Amtrak.

Number One Observatory Circle, located on the northeast grounds of the United States Naval Observatory in Washington, DC, was built in 1893 for its superintendent.

Prior to the formation of the Dallas Cowboys, there was not an NFL team south of Washington DC.

Mark was living in Washington, DC, working for National Public Radio.

When he was 12 years old he also discovered and enjoyed the Superman titles by DC Comics of the editor Mort Weisinger period, drawn mostly by his favorite Superman artists Curt Swan and Kurt Schaffenberger.

The name " Superman " was added to " A DC Publication ," effectively acknowledging both Superman and Batman.

In December 1973, this logo was modified with the addition of the words " The Line of DC Super-Stars " and the star motif that would continue in later logos.

On May 8, 2005, a new logo was unveiled, debuting on DC titles in June 2005 with DC Special: The Return of Donna Troy # 1 and the rest of the titles the following week.

In addition to comics, it was designed for DC properties in other media, which was used for movies since Batman Begins, Superman Returns, and the TV series Smallville, Justice League Unlimited and The Batman, as well as for collectibles and other merchandise.

The logo was designed by Josh Beatman of Brainchild Studios and DC executive Richard Bruning.

The police claimed that such scenes were " damaging " to their reputation and added that the character DC Deanne Cunningham was " irritatingly inaccurate ".

It was republished as graphic novel by the Wildstorm branch of DC Comics.

* The Frederick Douglass Memorial Bridge, sometimes referred to as the South Capitol Street Bridge, just south of the US Capitol in Washington DC, was built in 1950 and named in his honor.

* In 1962, his home in Anacostia ( Washington, DC ) became part of the National Park System, and in 1988 was designated the Frederick Douglass National Historic Site.

He was a minister several times for the Democrazia Cristiana party ( DC ), notably during his stay at Viminale ( Ministry for internal affairs ) where he re-structured the Italian police, civil protection and secret services.

Less than two years after its U. S release, King Kong vs. Godzilla was paid homage to by DC Comics, where the King Kong-like Titano battles the Godzilla-like Flame Dragon on the set of a monster movie.

The main event in the First Republic in the sixties was the inclusion of the Socialist party in the government, after the reducing edge of the Christian Democracy ( DC ) had forced them to accept this alliance ; attempts to incorporate the Italian Social Movement ( MSI ) in the Tambroni government led to riots, and were short-lived.

In this latter Lewis was sometimes featured with Superman, Batman, and various other DC heroes and villains.

Hoover was a devoted Freemason, being raised a Master Mason on 9 November 1920, in Federal Lodge No. 1, Washington, DC, just two months before his 26th birthday.

In 1977 he was honored by a major retrospective at the Solomon R. Guggenheim Museum, in New York that then traveled to the Hirshhorn Museum and Sculpture Garden in Washington, DC.

His second wife, Anna Dmitrevna Lyubimova ( 1913-2010 ), who married him in 1944, bore him two daughters, Yelena ( who worked at the Institute of Party History ) and Vera ( who worked at the Soviet Embassy in Washington, DC ) in the United States, and a son, Vladimir, who was a Goskino editorialist.

George Westinghouse and Edison became adversaries because of Edison's promotion of direct current ( DC ) for electric power distribution instead of the more easily transmitted alternating current ( AC ) system invented by Nikola Tesla and promoted by Westinghouse.

The modern DC motor was invented by accident in 1873, when Zénobe Gramme connected the dynamo he had invented to a second similar unit, driving it as a motor.

In 1886 Frank Julian Sprague invented the first practical DC motor, a non-sparking motor capable of constant speed under variable loads.

Nikola Tesla and Michail Dolivo-Dobrovolsky invented the first practical induction motors using a rotating magnetic field-previously all commercial motors were DC, with expensive commutators, high-maintenance brushes and characteristics unsuitable for operation on an alternating current network.

Ottó Bláthy also invented the AC electricity meter to compensate the competition of AC and DC technology.

The 1978 DC Super Dictionary invented a character, Conjura, who had the same magic ability as Zatanna, in addition to possessing a time-traveling amulet.

During his Marvel / DC stint, Austen invented the expression " Seven Deadly Trolls ".

** In the 1980s, DC Comics writer Roy Thomas invented a retcon to explain why Superman, the Spectre, and the Justice Society of America had been unable to defeat the Nazis: Hitler possessed the Spear of Destiny ( Spear of Longinus ) which gave him magical control over any superheroes who ventured into his territory.

* The DC Comics character Solomon Grundy, a large, strong zombie supervillain, invented as an adversary for the Green Lantern in 1944, and also a foe of Batman, was named after this nursery rhyme.

In DC Comics, promethium was invented and patented by Steve Dayton of Dayton Industries.

Ken Reid was re-commissioned to draw the strip in 1962, and Robert Nixon when Reid left DC Thomson in 1964.

K. Kavanaugh and O. Rodriguez ), Washington DC, 1964

Between 1804 and 1964, the US Congress cancelled US Presidential elections in Washington, DC, while the rest of State of Maryland continued to vote in these elections.

( After the mid-1980s demise of Charlton, Captain Atom would go on to become a stalwart of the DC stable, as would Blue Beetle, the old Fox Comics superhero revived by Gill and artists Bill Fraccio and Tony Tallarico as a campy, comedic character in Blue Beetle # 1 1964.

Batman Dracula ( 1964 ) is an American film that was produced and directed by Andy Warhol, without the permission of DC Comics.

Air America's headquarters moved several times during its existence, 808 17th St. NW, ( 1964 ), 801 World Center Bldg, ( late 1964 ), 815 Connecticut Ave NW, ( July 1968 ), and 1725 K Street NW, ( 1972 ), all in Washington, DC.

Whitechapel supplied peals of 10 bells ( later augmented to 12 ) for Guildford Cathedral in Surrey in the years following the Second World War, recast and augmented the bells of Canterbury Cathedral to a peal of 14 in 1981, and for the National Cathedral in Washington DC in 1964.

The first known commercially available phantom-powered microphone was the Schoeps model CMT 20, which came out in 1964, built to the specifications of French radio with 9 – 12 volt DC phantom power ; the positive pole of this powering was grounded.

Letters from him appeared regularly in the letters pages of both DC and Marvel Comics, including The Flash # 116 ( November 1960 ), Fantastic Four # 5 ( July 1962 ), and Fantastic Four # 22 ( January 1964 ) ( in which a letter by Dave Cockrum also appears ).

He died on October 28, 1964 in Washington, DC, from complications arising from this, kidney failure and pulmonary trouble.

The Metal Men co-starred with other DC heroes such as Atom, Metamorpho and Batman in The Brave and the Bold # 55 ( Sept. 1964 ), # 66 ( July 1966 ), # 74 ( Nov. 1967 ), # 103 ( Nov. 1972 ), # 113 ( July 1974 ), # 121 ( Sept. 1975 ), # 135-136 ( July-Sept. 1977 ) and # 187 ( June 1982 ).

* 1964 Two monumental figures for the Rayburn House Office Building, Washington, DC

Gene Davis also was a painter known especially for paintings of vertical stripes of color, like Black Grey Beat, 1964, and he also was a member of the group of abstract painters in Washington DC during the 1960s known as the Washington Color School.

These films include: Tarzan's Desert Mystery ( 1943 ), one of the chapters of the Superman serial ( 1948 ), Atom Man vs. Superman ( 1950 ), Two Lost Worlds ( 1950 ), The Lost Volcano ( 1950 ; Bomba, the Jungle Boy series ), the American version of Godzilla Raids Again, Jungle Manhunt ( 1951 ; Jungle Jim series ), Smoky Canyon ( 1952 ), the Yesterday's World episode of The Schaefer Century Theatre, Untamed Women ( 1952 ), Robot Monster ( 1953 ), The Lost Planet ( 1953 ), King Dinosaur ( 1955 ), Three Stooges's Space Ship Sappy ( 1957 ), Teenage Cave Man ( 1958 ), She Demons ( 1958 ), Valley of the Dragons ( 1961 ), Journey to the Center of Time ( 1967 ), Horror of the Blood Monsters ( 1970 ; the stock footage was tinted in color for this film ), the Mexican films Island of the Dinosaurs ( La Isla De Los Dinosaurios ; 1967 ), Adventure at the Center of the Earth ( Aventura al centro de la tierra ; 1966 ), and The Ghost Jesters ( Los fantasmas burlones ; 1964 ), One Million AC / DC ( 1970 ), TerrorVision, and Attack of the B Movie Monster ( 1989 ).

He was born in 1936 in Rochester, New York, grew up in the Washington, DC area, and was educated at the George Washington University and Harvard University ( Ph. D., 1964 ).