Where, as above, C is annuity payment, PV is principal, n is number of payments, starting at end of first period, and i is interest rate per period. Equivalently C is the periodic loan repayment for a loan of PV extending over n periods at interest rate, i.
Refractory epilepsy is a seizure disorder that resists drug treatment. There is some debate among clinicians and researchers about how to define refractory epilepsy. As a result, this term is used in a variety of ways, and when a patient's epilepsy is described as refractory, resistant, or nonresponsive, it can be advisable to ask for more detail about what the diagnosis means.
The refractory period is the one significant difference between the sexual response cycle of males and females. The refractory period occurs during the maleâs resolution phase. It is a length of time during which a male cannot become more aroused from any kind of sexual stimulation. This period can last from a few minutes to several days, depending on the maleâs age, frequency of sexual activity, and other things.