Investigation of the concept of beauty via a lock-in feedback experiment

Lock-in feedback circuits are routinely used in physics laboratories all around the world to extract small signals out of a noisy environment. In a recent paper (M. Kaptein, R. van Emden, and D. Iannuzzi, paper under review), we have shown that one can adapt the algorithm exploited in those circuits to gain insight in behavioral economics. In this paper, we extend this concept to a very subjective socio-philosophical concept: the concept of beauty. We run an experiment on 7414 volunteers, asking them to express their opinion on the physical features of an avatar. Each participant was prompted with an image whose features were adjusted sequentially via a lock-in feedback algorithm driven by the opinion expressed by the previous participants. Our results show that the method allows one to identify the most attractive features of the avatar

Суспільно-політична та культурно-просвітницька діяльність наукових осередків української діаспори в США

Досліджується та аналізується питання діяльності українських наукових осередків на території США. Особливу увагу приділено головним центрам науки української діаспори, а саме: Науковому товариству ім. Т. Шевченка, Українській вільній академії наук та Українському інституту Америки.The activity of Ukrainian scientific center on the area of U.S.A. is explorer and analyzed. The special attention is considered on three main centre of science of Ukrainian. Diaspora, and exactly on Scientific Society of name T. Shevchenko, Ukrainian free academy of science and Ukrainian institute of America

Публікації Я. Новицького на сторінках «Катеринославських губернських відомостей»

Pulsed-field-gradient nuclear magnetic resonance (NMR) combined with time-resolved chemically induced dynamic nuclear polarization (TR-CIDNP) was applied to study the reduction of guanosyl radicals in reactions with the proteins hen egg white lysozyme (HEWL) and bovine a-lactalbumin (BLA) in their native state.Guanosyl radicalswere generated photochemically in the reaction of guanosine-50-monophosphate with photosensitizer, triplet-excited 2,20-dipyridyl. In this reaction, at pH 5 guanosyl cation radical is formed, which deprotonates to yield the neutral guanosyl radical. To minimize the contribution of the cation radical, phosphate buffer was added, which accelerates the deprotonation of guanosyl cation radical. From model simulations of CIDNP kinetics the rate constants of the reduction were found to be (3.1 ± 0.5) 9 107 M-1s-1 for HEWL and (1.6 ± 0.4) 9 107 M-1s-1 for BLA. Also, experiments were carried out at the conditions for denatured HEWL, i.e., at 50 C in the presence of 10 M urea-d4. The rate constant of the reduction of guanosyl radical in this case was (3.6 ± 0.5) 9 108 M-1s-1