Nonsmooth analysis of the pulse pressured infusion fluid flow

This work deals with forced oscillations of fluid flows generated by infusive pump connected to a human ventricular artery. Response curves are obtained and the nonlinearity is investigated for various geometrical conditions, excitation amplitudes, and periodic conditions. The nonlinearity related to the energy losses has been taken into considerations. An overall model for the study of an isothermal fluid flow across a highly incompressible medium is proposed. The main difficulty being that the infusion fluid flow results from a pressure prescribed over the venous artery involving impact boundary conditions. The proposed solution has been constructed by taking into account the interactions between all the solid and fluid components directly in mass balance and energy conservation equations. Applications of nonsmooth time transformations and introducing a unified physical basis for analyses of infusive fluid flow with essentially nonharmonic, and discontinuous time shapes revealed explicit links between impact dynamics and hyperbolic (complex) algebras analogously to the link between harmonic oscillations and conventional complex analyses. This study also deals with the coupling condition between the barrel fluid region and venous instantaneous states. This appears as prime importance for a global model of infusion processes.     

New perspectives in the studies of resonance scattering

We consider various possibilities for studies of nuclear structure in resonance reactions induced by radioactive beam. We discuss investigations on both sides of nuclear stability as well as studies of the α-cluster structure of light nuclei applying the reverse geometry thick target method.     

Nuclear rainbow in scattering and reactions and nucleus-nucleus interaction at small distances

A review of recent experiments on the study of the nuclear rainbow phenomenon in scattering and some reactions induced by light heavy ions is given. It includes (i) the study of the differential cross sections of the ¹⁶O + ¹²C elastic scattering at seven ¹⁶O energies between 130 and 281 MeV; (ii) finding of the phenomenological potential deeper than that of folding model; (iii) the first data on ¹⁶O + ¹⁴C elastic scattering; (iv) dispersion relation analysis of the obtained data and observation of abnormal nuclear dispersion; and (v) use of the charge-exchange ¹⁴C(⁶Li,⁶He)¹⁴N reaction to search for pion-condensation effects.     

Manifestations of clustering in fission of excited actinides

A new, graphical way of extracting important physical information from the total kinetic-energy—mass (TKE—M) distributions of the nuclear reaction products is presented. The resulting images indicate for the first time the presence of the Ni—Mo and Ge—Mo fission modes in the fission of Np nuclei at intermediate excitation energies.     

Nuclear states with anomalously large radius (size isomers)

Methods of determination of the nuclear excited state radii are discussed together with the recently obtained data on the states of some light nuclei having abnormally large radii (size isomers). It is shown that such states include excited neutron-halo states in ⁹Be, ¹¹Be, and ¹³C and some alpha-cluster states in ¹²C, ¹¹B, and ¹³C. Among the latter ones, there is the well-known Hoyle state in ¹²C—the structure of this state exhibit rudimentary features of alpha-particle states.     

Evaluation of the separation characteristics of application-specific (fatty acid methyl esters) open-tubular columns for gas chromatography

The solvation parameter model is used to characterize the separation properties of the polar stationary phases EC-Wax and PAG with a poly(ethylene oxide) backbone (substituted with propylene oxide in the case of PAG) and the cyanopropyl-substituted polysilphenylene-siloxane stationary phase BPX90 at five equally spaced temperatures between 60 and 140 degrees C. The separation characteristics of these stationary phases are compared to four PEG and two poly(cyanopropylsiloxane) stationary phases (HP-20M, HP-Innowax, SolGel-Wax, DB-WAXetr, HP-88, and SP-2340) characterized in the same way. The database of system constants for these polar stationary phases is used to provide insight into the separation mechanism for fatty acid methyl esters and to determine selectivity differences that can be expected for generically similar stationary phase types. The discussion is not structured to indicate which stationary phase should be used for a particular separation but to provide a general framework to demonstrate the relationship between the retention mechanism and stationary phase chemistry.