The article proposes a method for monitoring the peak-to-average power ratio (PAPR), and also discusses the results of assessing the sensitivity of optical-OFDM systems to phase-frequency distortions. The results of a study of the noise immunity of an optical-OFDM system for frequency shift relative to the spacing of optical subcarriers are presented.
Magnetic hydrogels form a class of soft materials with remote controllable properties that have attracted great attention due to their applications in biomedical engineering, including tissue engineering, drug delivery and release, enzyme immobilization and cancer therapy.
The results of statistical measurements of the resistance of the metal film resistor are given below. The analysis of the dependencies of the standard deviation on the number of measurements σR(N)envisages a tendency of raising σR with the number of measurements. It indicates that the obtained results are not independent since fluctuations of them are not of “white” noise type. The dependence of the standard deviation of measurement results onN confirms the results of other studies.
This paper presents the results of equivalent measurements of electrical resistance of two identical resistive coils. It is suggested that the difference between the RMS of investigated coils is formed as result of their non-equilibrium states. The energy spectrum of resistance fluctuations of investigated coils and the frequency range within which the energy spectrum changes unsignificantly, are determined.
The factors which allow obtaining stable polymer dispersions in the water of new amphiphilic polyesters based on the polyeterdiols as hydrophilic blocks and N-acylderivatives of glutamic acid as lipophilic blocks were proved. The dependence of the stability of the obtained dispersions on the macromolecule structure and polyoxyethylene fragment molecular mass in its structure was established. The macromolecules of new pseudo-poly(amino acid) according to their colloidal, chemical and biomedical parameters can be used for polymer systems shipping design of therapeutic means.
The possibility of formation of hydrogel compositions based on the reinforced crosslinked polyacrylamide filled with amphiphilic polyesterether nanoparticles for transdermal drug delivery systems is shown. Показана можливість створення гідрогелевих композицій на основі армованого перехреснозшитого поліакриламіду, наповненого наночастинками амфіфільного поліестеретеру, для трансдермальних засобів доставки ліків.
The approaches to the formation of the investment risks essence, their classifying features and the methods of their assessment are summarized. The basic constituents of the investment risk nature as an economic category are substantiated. The main methods of evaluating investment risks are analyzed. Particular attention is paid to the intuitive part of the process of making investment decisions. The major factors affecting the choice of the investment risks analyzing methods are singled out.