2. A solution of the form (2a) is, however, physically unrealizable because it indicates an
amplitude growing to infinity. Thus for actual physical systems the differential equation (3) will …

… Secondly, we will consider the case in which the external EMF B is equated to zero. … In
this instance we are dealing solely with the presence of forged oscillation, seeing that both …

IT is a well-known fact that when a sinusoidal EMF (of the form E 0 sin wt) is available, it is a
relatively simple matter to design an electrical system such that alternating currents or …

… Actually, the van der Pol system (1) satisfies the Liénard's theorem ensuring that there is
a stable … The van der Pol system is therefore a Liénard system. … B. …

Trichomonas vaginalis infection was first described as a venereal disease in the mid-20th
century, decades before Chlamydia trachomatis infection would be recognized as such. The …

~>>~ 2.......(2) it is obvious that as long as v<< 1, the variable v will initially leave the value v--0
in an aperiodic way, hut when later v 2> 1, the resistance has changed its sign and has …

… Roth AM, Williams JA, Ly R, Curd K, Brooks D, Arno J, Van Der Pol B. 2011. Changing
sexually transmitted infection screening protocol will result in improved case finding for …

This report updates CDC's 2002 recommendations regarding screening tests to detect
Chlamydia trachomatis and Neisseria gonorrhoeae infections (CDC. Screening tests to detect …

Background. Trichomoniasis vaginalis is the most common nonviral sexually transmitted
infection (STI) worldwide, with a particularly high prevalence in regions of human …

… In addition to dual tests for HIV and syphilis, there is a need in some settings, in particular
in Asia where hepatitis B is endemic, for triplex assays to detect HIV, syphilis, and hepatitis B …