The durations of recession and prosperity: does their distribution follow a power or an exponential law?

The duration of recessions follows an ex

The duration of recessions follows an exponential not a power law

✍ Ian Wright 📂 Article 📅 2005 🏛 Elsevier Science 🌐 English ⚖ 154 KB

The quantic exposure law (density as fun

The quantic exposure law (density as function of exposure) for a uniform emulsion. Emulsions containing silver halide grains of different sizes. General formulae and their application to emulsions of exponential and gaussian or “ormal” size-frequency distribution of grains. Some relations valid for any size-frequency distribution

✍ Ludwik Silberstein 📂 Article 📅 1951 🏛 Elsevier Science 🌐 English ⚖ 999 KB

In the proper field of the art of photography and its practical applications, it is not the number and size of the individual grains made developable by an exposure which are required, but the macroscopic, summary effect of the presence of such grains, the opacity of the film or plate over which the