Optimal Timing of TV Commercials: Symmetrical Model

In this paper I study the behavior of free-good producers (TV broadcasters) on a market where every consumer (TV viewer) perpetually makes a decision whether to consume and which product (TV channel) to consume contingent on the attractiveness of the currently consumed product. Every producer optimally allocates a time period where a product with higher attractiveness (TV program) is replaced by a product with lower attractiveness (advertising). While products with higher attractiveness represent producers’ costs, products with lower attractiveness bring in revenue that is proportional to the audience reach. I assume that consumers choose among products and the outside option following a Markov process where probabilities of transition reflect various attractiveness of the products. Given symmetrical positions of the producers, I prove that their optimal strategy is to put their commercial breaks into the same or very close times. For some setting of the parameters, the breaks will overlap perfectly. Given the perfect overlap, both broadcasters are better off if they fragment their breaks into shorter breaks keeping the total amount of commercial time the same.

X-ray microscopy of living multicellular organisms with the Prague Asterix Iodine Laser System

Soft X-ray contact microscopy (SXCM) experiments have been performed using the Prague Asterix Iodine Laser System (PALS). Laser wavelength and pulse duration were λ = 1.314 μm and τ (FWHM) = 450 ps, respectively. Pulsed X rays were generated using teflon, gold, and molybdenum targets with laser intensities I ≥ 1014 W/cm2. Experiments have been performed on the nematodes Caenorhabditis elegans. Images were recorded on PMMA photo resists and analyzed using an atomic force microscope operating in contact mode. Our preliminary results indicate the suitability of the SXCM for multicellular specimens

Shock pressure induced by 0.44 [mu]m laser radiation on aluminum targets

Shock pressure generated in aluminum targets due to the interaction of 0.44 μm (3 ω of iodine laser) laser radiation has been studied. The laser intensity profile was smoothed using phase zone plates. Aluminum step targets were irradiated at an intensity I ≈ 1014 W/cm2. Shock velocity in the aluminum target was estimated by detecting the shock luminosity from the target rear using a streak camera to infer the shock pressure. Experimental results show a good agreement with the theoretical model based on the delocalized laser absorption approximation. In the present report, we explicitly discuss the importance of target thickness on the shock pressure scaling

A Dynamic Model of Consumers' Random Choice with Applications to the TV Market.

Available from STL Prague, CZ / NTK - National Technical LibrarySIGLECZCzech Republi

Optimal Timing of TV Commercials: Symmetrical Model.

In this paper the behavior of free-good producers on a market where every consumer perpetually makes a decision whether to consume and which product to consume contingent on the attractiveness of the currently consumed product is studied. Every producer optimally allocates a time period where a product with higher attractiveness is replaced by a product with lower attractiveness. While products with higher attractiveness represent producers' costs, products with lower attractiveness bring in revenue that is proportional to the audience reach.Available from STL Prague, CZ / NTK - National Technical LibrarySIGLECZCzech Republi

Microhabitat requirements of caterpillars of the critically endangered butterfly Chazara briseis (L.) (Nymphalidae, Satyrinae) in the Czech Republic

Volume: 32Start Page: 39End Page: 4

A nordic center for energy efficient renovations

Treball desenvolupat dins el marc del programa 'European Project Semester'.This present work has been elaborated with the purpose of gathering information about building renovations from different parts of Europe, focusing on methods and techniques, which can be applied in Nordic countries building projects. In order to achieve this mission it has written a series of definitions of fundamental techniques aspects about building covers, building installations, indoor environment, material specification and case studies. In addition, to get an overview about how the building renovation sector and the legislations in Europe are currently, the project also includes research information about European Union, Austrian, French, German and Spanish policies, local laws and measures. All information has been presented in a simple way so that the different stakeholders are able to access directly without complications and easy understandi