Adatom incorporation and step crossing at the edges of 2D nanoislands

Adatom incorporation into the ``faceted'' steps bordering the 2D nanoislands is analyzed. The step permeability and incorporation coefficients are derived for some typical growth situations. It is shown that the step consisting of equivalent straight segments can be permeable even in the case of fast egde migration if there exist factors delaying creation of new kinks. The step consisting of alternating rough and straight segments may be permeable if there is no adatom transport between neighboring segments through the corner diffusion.Comment: 3 pages, one figur

Gravity Effect on Electrical Field Generation and Charge Carriers Transfer During Combustion Synthesis of Sulfides

The effect of gravity on the electric potential generated by the combustion synthesis of zinc sulfide is analyzed using the numerical simulation. Recent experimental studies on generation of electric voltage during combustion synthesis of zinc sulfide (ZnS) have revealed high voltage signals (4 V) with duration about 1 s, which are much higher than those produced by the gas–solid and solid–solid combustion reactions studied previously. These data have raised the question about mechanism of such a phenomenon. In our previous work we developed a novel (distributed) model describing the electric potential generation during combustion synthesis of sulfides (CSS) that didn\u27t count the effect of gravity. In this paper the simulations of heat - mass transfer, charge carriers motion, and voltage profiles taking into account the Earth gravity effect. The simulations confirms that the gravitation force strongly affects the emission of negatively charged sulfur ions as well as electrons and has a significant impact on the amplitude and temporal evolution of the combustion induced voltage. The voltage reduction up to four times has been observed numerically in the case when gravity acts in the direction coincident to that of the propagating combustion wave. Vice versa, the significant acceleration of the combustion and the voltage amplification due to the advection is simulated when gravity acts in the direction opposite to that of the propagating combustion wave

Fabrication and properties of L-arginine-doped PCL electrospun composite scaffolds

The article describes fabrication and properties of composite fibrous scaffolds obtained by electrospinning of the solution of poly({\epsilon}-caprolactone) and arginine in common solvent. The influence of arginine content on structure, mechanical, surface and biological properties of the scaffolds was investigated. It was found that with an increase of arginine concentration diameter of the scaffold fibers was reduced, which was accompanied by an increase of scaffold strength and Young modulus. It was demonstrated that porosity and water contact angle of the scaffold are independent from arginine content. The best cell adhesion and viability was shown on scaffolds with arginine concentration from 0.5 to 1 % wt

Temperature independent diffuse scattering and elastic lattice deformations in relaxor PbMg1/3Nb2/3O3

The results of diffuse neutron scattering experiment on PbMg1/3Nb2/3O3 single crystal above the Burns temperature are reported. It is shown that the high temperature elastic diffuse component is highly anisotropic in low-symmetry Brillouin zones and this anisotropy can be described using Huang scattering formalism assuming that the scattering originates from mesoscopic lattice deformations due to elastic defects. The qualitative agreement between this model and the experimental data is achieved with simple isotropic defects. It is demonstrated that weak satellite maxima near the Bragg reflections can be interpreted as the finite resolution effect.Comment: 7 pages, 7 figure

Investigation of preparative possibilities of iodinating systems on the basis of N-iodoacetamide

N-iodoacetamide in organic solvents with H2SО4 iodinates successfully alkylbenzenes, aromatic amines and phenol ether. Electrophilic iodine activity is controlled by medium acidity. Super electrophilic iodine formed at N-iodoacetamide dissolution in sulfuric acid reacts easily with electron-deficient arenes at 0...20 °C forming iodinated product

Elliptic flow at large transverse momenta from quark coalescence

We show that hadronization via quark coalescence enhances hadron elliptic flow at large pT relative to that of partons at the same transverse momentum. Therefore, compared to earlier results based on covariant parton transport theory, more moderate initial parton densities dN/d\eta(b=0) ~ 1500-3000 can explain the differential elliptic flow v_2(pT) data for Au+Au reactions at s^1/2=130 and 200 AGeV from RHIC. In addition, v2(pT) could saturate at about 50% higher values for baryons than for mesons. If strange quarks have weaker flow than light quarks, hadron v_2 at high pT decreases with relative strangeness content.Comment: Minor changes, extended discussion. To appear in PR

Using NETCONF-proxy server to integrate laboratory equipment into software-defined infrastructures

The essential changes that have taken place over the past decade in the field of telecommunications present new requirements for the educational institutions laboratory complexes management. The modern management concept "Infrastructure as Code"(Infrastructure as Code, IaC) proclaims the usage of a single and universal approach for programmatic management of all components of the communication and computing infrastructure. One of the most common ways to implement this approach is based on the representation of managed unit's configurations in the form of specially marked-up records that form the configuration management database. In this case, process of infrastructure components control is nothing more then sequence of transactions that can be performed for this database records, both locally or remotely - by using network management protocols. The implementation of solutions based on modern universal protocols and network management tools will be complicated when the controlled components do not support modern network management protocols and are separated by the institution's intranet. As one of the possible approaches to solving these problems, we consider the use of gateway communication servers as part of the training classes, which will be able to implement dynamic configuration management of special laboratory equipment of the training class and to provide information interaction between the components of the laboratory complex. The paper considers the choice of control protocols for the gateway server, as well as tools for managing communication infrastructures, and presents an implementation option for this approach for integrating special laboratory equipment of the IRIT RTF at Ural Federal University laboratory classes into a single software-defined laboratory complex. © Published under licence by IOP Publishing Ltd