Nyquist rateIn signal processing, the Nyquist rate, named after Harry Nyquist, is a value (in units of samples per second or hertz, Hz) equal to twice the highest frequency (bandwidth) of a given function or signal. When the function is digitized at a higher sample rate (see ), the resulting discrete-time sequence is said to be free of the distortion known as aliasing. Conversely, for a given sample-rate the corresponding Nyquist frequency in Hz is one-half the sample-rate.
Laser absorption spectrometryLaser absorption spectrometry (LAS) refers to techniques that use lasers to assess the concentration or amount of a species in gas phase by absorption spectrometry (AS). Optical spectroscopic techniques in general, and laser-based techniques in particular, have a great potential for detection and monitoring of constituents in gas phase. They combine a number of important properties, e.g. a high sensitivity and a high selectivity with non-intrusive and remote sensing capabilities.
Anamnèse (médecine)L’anamnèse (substantif féminin, du grec . aná-: « de bas en haut » -mnêsis, « mémoire » c'est-à-dire « faire remonter les souvenirs ») est le récit des antécédents d'un malade. L'anamnèse retrace les antécédents médicaux et l'historique de la plainte, la douleur actuelle du patient (c'est-à-dire l'histoire de la maladie - terme qui n'est pas synonyme d'anamnèse, mais plutôt de remémoration), ainsi que les résultats des différentes explorations déjà faites et les traitements entrepris.
