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They start to crawl clockwise at a constant rate , each moving toward its neighbor . For perfectly periodic waves , destructive interference occurs whenever one wave lags behind the other by half a wavelength , one-and-a-half wavelengths , two-and-a-half wavelengths , and so on . In the 1980s , as an undergraduate working toward a degree in mathematics at Drew University in Madison , N.J ., she found herself particularly intrigued by courses on symbolic logic and infinity . " You can be assured that we're hearing you loud and clear , " replied the panel 's chairman , Rep. David Price , D-N.C . " I do n't think that I can tell the president what to put on the table and not to put on the table , but I can tell him , ' do n't pick a damn fight , ' " said House Ways and Means Committee Chairman Charles Rangel , D-N.Y . Unlike chief GOP rivals Sen. John McCain and Mitt Romney , Giuliani has been somewhat ambiguous about whether or not he will ultimately pursue the Republican nomination , even though he has taken the initial steps . " I have n't closed the door on others , but I recognize it would be easier on me , easier on her and easier on the family , and those are the people that are important in a marriage , " he said of his desire to meet and marry someone with Coptic roots . All appeared for the first time at the same event this weekend for the DNC gathering , and the divisions began to show , particularly on the Iraq war . In one Clobber variant , the players begin with a blank board , then take turns putting a stone on the board until the board is filled , creating their own starting configuration . " He said Copts participate fully in American life but try to act within the strict guidelines set by the church , which puts limits on dating , prohibits premarital sex and frowns on heavy drinking and other aspects of what Copts view as an extremely permissive culture . It was n't until 1994 , however , that anyone actually stepped into a laboratory and succeeded in solving a computational problem in a test tube . If all four people move at the same time and at the same constant speed , each person follows a spiral path toward the square 's center . Until reflection phase gratings came along , there really were no surfaces designed to spread sound around in both space and time . The review of the logistics operations in Iraq did not begin until after Foggo had been tapped by then-CIA Director Porter Goss to be the agency 's No. 3 — the executive director — who would run the agency 's day-to-day operations . When they tried to walk toward the targets after being blindfolded or threw beanbags at them , they nearly always missed . Cars behind that vehicle slow down in response , and traffic begins to bunch up until the lead vehicle 's speed increases again . " We're asking for uniform national standards across all growing regions with a compliance measurement implemented by government that assures public trust , " he said . Each person looks directly at the person to his or her left , then begins to walk toward that person .