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This Kipp culture is maintained the old-fashioned way , through after-school detention , suspension , and even , on rare occasions , expulsion . Two-dimensional hydraulic modeling allows investigators to calculate a depth and mean column water velocity for anywhere , and everywhere , on a river and under any flow conditions chosen . I whirled round , and there , on one of those dry gravel beds , was the biggest snake I had ever seen . These effects may be seen unilaterally , on one side of the face , or bilaterally , on both sides , depending on which structure or portion of the face is affected . It describes the practices of morticians who seek to induce people to buy more expensive coffins so that the beloved dead can rest not only peacefully , but lightly , on foam mattresses .