Here is a question about this article: Initially PCBs were designed manually by creating a photomask on a clear mylar sheet, usually at two or four times the true size. Starting from the schematic diagram the component pin pads were laid out on the mylar and then traces were routed to connect the pads. Rub-on dry transfers of common component footprints increased efficiency. Traces were made with self-adhesive tape. Pre-printed non-reproducing grids on the mylar assisted in layout. To fabricate the board, the finished photomask was photolithographically reproduced onto a photoresist coating on the blank copper-clad boards.
What is the answer to this question: What did PCB designers used to employ on a mylar sheet?
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So... photomask


Here is a question about this article: More than two-thirds of inner Boston's modern land area did not exist when the city was founded, but was created via the gradual filling in of the surrounding tidal areas over the centuries, notably with earth from the leveling or lowering of Boston's three original hills (the "Trimountain", after which Tremont Street is named), and with gravel brought by train from Needham to fill the Back Bay. Downtown and its immediate surroundings consists largely of low-rise (often Federal style and Greek Revival) masonry buildings, interspersed with modern highrises, notably in the Financial District, Government Center, and South Boston. Back Bay includes many prominent landmarks, such as the Boston Public Library, Christian Science Center, Copley Square, Newbury Street, and New England's two tallest buildings—the John Hancock Tower and the Prudential Center. Near the John Hancock Tower is the old John Hancock Building with its prominent illuminated beacon, the color of which forecasts the weather. Smaller commercial areas are interspersed among areas of single-family homes and wooden/brick multi-family row houses. The South End Historic District is the largest surviving contiguous Victorian-era neighborhood in the US. The geography of downtown and South Boston was particularly impacted by the Central Artery/Tunnel Project (known unofficially as the "Big Dig"), which allowed for the removal of the unsightly elevated Central Artery and the incorporation of new green spaces and open areas.
What is the answer to this question: The modern land area was created by the gradual filling in of surrounding what?
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So... tidal areas


Here is a question about this article: The university is affiliated with the Congregation of Holy Cross (Latin: Congregatio a Sancta Cruce, abbreviated postnominals: "CSC"). While religious affiliation is not a criterion for admission, more than 93% of students identify as Christian, with over 80% of the total being Catholic. Collectively, Catholic Mass is celebrated over 100 times per week on campus, and a large campus ministry program provides for the faith needs of the community. There are multitudes of religious statues and artwork around campus, most prominent of which are the statue of Mary on the Main Building, the Notre Dame Grotto, and the Word of Life mural on Hesburgh Library depicting Christ as a teacher. Additionally, every classroom displays a crucifix. There are many religious clubs (catholic and non-Catholic) at the school, including Council #1477 of the Knights of Columbus (KOC), Baptist Collegiate Ministry (BCM), Jewish Club, Muslim Student Association, Orthodox Christian Fellowship, The Mormon Club, and many more. The Notre Dame KofC are known for being the first collegiate council of KofC, operating a charitable concession stand during every home football game and owning their own building on campus which can be used as a cigar lounge. Fifty-seven chapels are located throughout the campus.
What is the answer to this question: What amount of the student body of Notre Dame identifies as Catholic?
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So...
over 80%