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Abstract
The experimental delayed-neutron spectra of 25 precursors in fission have been described in terms of a series of fine structure peaks superimposed on a gross structure consisting of 1–3 components corresponding to different wave-numbers. These precursors are responsible for 85–87% of the delayed-neutron effect in nuclear fuel. By including also some precursors whose spectra have been deduced by an extrapolation procedure the effective delayed-neutron energy distribution in nuclear fuel can be accurately calculated. As a byproduct the applicability of some recent mass formulas in the region of very neutron-rich nuclei has been tested. Systematic deviations have been found, which indicate the need of further investigations.
Bigot, K., Mignon-Grasteau, S., Picard, M. and Tesseraud, S. (2003): Effects of delayed feed intake on body, intestine, and muscle development in neonate broilers. Poult. Sci. 82 , 781
rewards to large delayed rewards ( Irvine et al., 2013 ). There are several paradigms that have been used to investigate risk-taking, such as the Balloon Analog Risk Task (BART) ( Lejuez et al., 2002 ), Bechara’s gambling task (Iowa Gambling Task
Abstract
In this paper we analyse the growth in scientific results of natural sciences in terms of infinite dynamical system theory. We use functional differential equations to model the evolution of science in its sociological aspect. Our model includes the time-to-build of fundamental notions in science (time required to understand them). We show that the delay parameter describing time required to learn and to apply past scientific results to new discoveries plays a crucial role in generating cyclic behaviour via the Hopf bifurcation scenario. Our model extends the de Solla Price model by including death of results as well as by incorporating the time-to-build notion. We also discuss the concepts of knowledge and its accumulation used in economic growth theory.
