Oceanic lithosphere is continuously formed at a constant rate at the mid-ocean ridges 1 0 = 0. Thus at x = 0 the temperature is the Heaviside step function. Finally, we assume the system is at a quasi-steady state, so that the temperature distribution is constant in time, i.e. T=T(x,z).
Because preeclampsia can prevent proper blood flow to the placenta, babies may be born prematurely and can suffer from later conditions such as learning disabilities, epilepsy and hearing and vision problems.
Other tests may also be used to check for signs of preeclampsia, including: 1  Blood testsBlood tests to check for problems such as HELLP syndrome and kidney damage. 2  Creatinine clearance testCreatinine clearance test to check kidney function. 3  24-hour urine collection test to check protein in the urine.ertain tests are given at each prenatal visit to check for preeclampsia. These include a: 1  Blood pressure reading. 2  Blood pressure is always monitored closely during pregnancy. 3  Urine testUrine test to check for too much protein in the urine. 4  This is a sign of kidney damage caused by preeclampsia. 5  Weight measurement.