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The hot comb was an invention developed in France as a way for women with coarse curly hair to achieve a fine straight look traditionally modeled by historical Egyptian women. [44] However, it was Annie Malone who first patented this tool, while her protégé and former worker, Madam C. J. Walker , widened the teeth.
The war of the currents was a series of events surrounding the introduction of competing electric power transmission systems in the late 1880s and early 1890s. It grew out of two lighting systems developed in the late 1870s and early 1880s; arc lamp street lighting running on high-voltage alternating current (AC), and large-scale low-voltage direct current (DC) indoor incandescent lighting ...
In DC Comics Presents #41, (January 1982), on page 7 of the special Wonder Woman insert, a character identified as "Liz" on the previous page, who states that she is a representative of an organization called the Wonder Woman Foundation, explains "We've been promised full financial backing to promote equality for women everywhere, if we can use ...
Any stationary voltage or current waveform can be decomposed into a sum of a DC component and a zero-mean time-varying component; the DC component is defined to be the expected value, or the average value of the voltage or current over all time. Although DC stands for "direct current", DC often refers to "constant polarity".
DC Jim Chambers: Detective Comics #20 Wing: 1938 (October) DC Jim Chambers: Detective Comics #20 Namor the Sub-Mariner: 1939 (April) Marvel/Timely: Bill Everett: Motion Picture Funnies Weekly #1 The Guardian Angel (Hop Harrigan) 1939 (April) DC Jon Blummer All-American Comics #1 Batman (Bruce Wayne) 1939 (May) DC Bob Kane, Bill Finger ...
Grace Brewster Hopper (née Murray; December 9, 1906 – January 1, 1992) was an American computer scientist, mathematician, and United States Navy rear admiral. [1] She was a pioneer of computer programming.
Batwoman (Katherine "Kathy" Kane) is a superheroine appearing in American comic books published by DC Comics.She is the first DC character to bear the name "Batwoman".She was created by writer Edmond Hamilton and artist Sheldon Moldoff under the direction of editor Jack Schiff, as part of an ongoing effort to expand Batman's cast of supporting characters.
In 1956, DC Comics successfully revived superheroes, ushering in what became known as the Silver Age of comic books. Rather than bringing back the same Golden Age heroes, DC rethought them as new characters for the modern age. The Flash was the first revival, in the tryout comic book Showcase #4 (October 1956).