Molecular dynamics simulations employing reactive potentials were used to determine the activation barriers to the dissolution of the amorphous SiO2 surface in the presence of a 2 nm overlayer of water. The potential of mean force calculations of the reactions of water molecules with 15 different starting Q4 sites (Qi is the Si site with i bridging oxygen neighbors) to eventually form the disso...

The note “Beskrivelse af et bærbart instrument til måling af vejbelægningers refleksionsegenskaber” (in Danish) explains that the two values of the reduced luminance coefficient, r1 and r2, of a road surface lead to the both of the characteristic values for the reflection properties of road surfaces. These are the specular factor S1 and the average reflection measured by either the average lumi...

Nowadays, atomic-force microscopy plays a significant role in nanoscience and nanotechnology, and is widely used for direct measurement at atomic scale and scanning the sample surfaces. In tapping mode, the microcantilever of atomic-force microscope is excited at resonance frequency. Therefore, it is important to study its resonance. Moreover, atomic-force microscopes can be operated in fluid e...

An analytical method has been developed for determining the dependence of fading frequency correlation interval in a single-beam decameter radio link on ratio operating to maximum applicable frequency, degree ionospheric diffuseness (the intensity small-scale irregularities), and communication range (radio length). This is obtained as product traditional by reduction factor. It substantiated th...

Introduction: LiF dosimeter has the most application in medicine. This study aimed to evaluate some dosimetric properties of a novel LiF: Mg, Ti. Materials and Methods: An ELEKTA Precise linear accelerator was used to calibrate dosimeters at 6 MV. In this survey, responses of dosimeters were evaluated up to 1000 cGy. Background effect was investigated in two different dosimeter states includin...

We give a description of invariants and attractors the critical subcritical Galton–Watson tree measures under operation Horton pruning (cutting leaves with subsequent series reduction). Under regularity condition, class invariant consists binary one-parameter family trees offspring distribution {qk} that has power tail qk∼Ck−(1+1/q0), where q0∈(1/2,1). Each measure non-empty domain attraction c...

We have determined the phase diagram for a lattice system of biaxial particles interacting with a second rank anisotropic potential using Monte Carlo simulations for a number of values of the molecular biaxiality. We find increasing differences from mean field theory as the biaxiality increases. We have also calculated for the first time the full set of second rank biaxial and uniaxial order pa...

Let Ln be the length of a longest increasing subsequence in a random permutation of {1, ..., n}. It is known that the expected value of Ln is asymptotically equal to 2 √ n as n gets large. This note derives upper bound on the probability that Ln − 2 √ n exceeds certain quantities. In particular, we prove that Ln − 2 √ n has order at most n1/6 with high probability. Our main result is an isoperi...

[1] The influence of ultralow frequency (ULF) waves in the Pc5 frequency range on radiation belt electrons in a compressed dipole magnetic field is examined. This is the first analysis in three dimensions utilizing model ULF wave electric and magnetic fields on the guiding center trajectories of relativistic electrons. A model is developed, describing magnetic and electric fields associated wit...