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A Roman villa in the Barbaricum, 300 km from the Limes? First research results on the "Roman Station" at Buzovycja. In 2020–2021 a site of clear Roman origin was discovered near Buzovycja (Ukraine, Černivci region). First field research in 2020 already suggested the existence of buildings that were built according to Roman building traditions. Specific architectural remains have been identified in several places on the surface of the site. In addition to the usual finds of the Černjachiv culture, such accumulations also contained fragments of brick, mortar and stone. According to the results of a geomagnetic survey conducted in 2021, a promising anomaly in the central part of the settlement site was selected for test digging. The main task of the archaeological excavations that followed was to determine the architectural type of the object and to date it. The excavation revealed an area of buildings constructed of brick, stone and lime mortar. The width of the building was about 9.3 m, the possible length can be estimated at about 20 m. The exposed building floor was 1.4 m below today's surface level and was a „screed"of concrete mortar and limestone. In the central part of the building, three round bricks were discovered on the concrete floor, one of which was fixed in place. Complete blocks of bricks were found in places, with up to four layers and connected with lime mortar. A number of finds were recovered in the building. This included Černjachiv ceramics, Forlimpopoli amphorae, amphora stands, glass beads, an iron chain and other objects. The analysis of the finds and the remains of the building showed that the building dates back to the late Roman period (3rd – mid 5th century AD). The salvaged remains of the building ceramics and mortar indicate that it was built in the Roman architectural tradition. The presence of rectangular and round brick blocks in a layer of destruction suggests that the building had a hypocaust. Other archaeological finds from the Buzovycja-1 site belong mainly to the Černjachiv culture. According to the current state of investigation, the overall finding is interpreted as a local settlement with buildings erected in the Roman building tradition. [ABSTRACT FROM AUTHOR]

A model of subphtalocyanine molecules ordering on Ag(111) is proposed. We have demonstrated that the driving force of the ordering into honeycomb and hexagonal close packed patterns is a balance of intermolecular and subphtalocyanine–Ag interactions which can be generally expressed by a potential with infinite exclusion in a sufficiently large number of nearest coordination spheres of Ag(111) lattice and oscillatingly decaying behavior outside the sphere of exclusion. To cope with computational problems due to large size of the molecules compared to the substrate lattice period, we introduce the rescaling of Ag(111) lattice, and took into account an infinite exclusion of first, second, and third neighbors, attraction—of fourth and fifth, and repulsion—of sixth and seventh. The phase diagram is obtained by the lattice gas model using Monte Carlo simulations. Very strong first order phase transitions, causing the two-phase coexistence, were found between disordered and honeycomb as well as between disordered and hexagonal closed packed phases.© 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Monte Carlo simulation of phase transitions to antiferromagnetic stripe phases are performed for square and triangular lattices. We employed Ising model with competing ferromagnetic nearest neighbour and antiferromagnetic dipolar interactions and calculated phase diagram for different values of exchange and dipolar interaction ratio. The order of transitions to stripe phases with different interaction ratio (stripe width) was determined. We have shown by using histogram method that for transition to the stripe phase AF1 with the smallest stripe width h = a (a is lattice constant) the order is different for square and triangular lattices. For a square lattice the first order phase transition is found only for transitions to AF2 (h = 2a) phase, the transitions to AF1 and AF3 (h = 3a) phases being continuous. For triangular lattice we determined first order phase transitions to AF1 and AF2 phases and second order phase transitions to AF3 and AF4 phases. [ABSTRACT FROM AUTHOR]

Abstract: The model has been proposed to simulate numerically the reaction O+CO→CO2 and occurring phase transitions on Pd(111) surface. We calculate the phase diagram for this system by kinetic Monte Carlo method. It shows the phase transitions and with increase of CO coverage for room and intermediate temperatures, respectively, while in the low temperature limit the direct p(2×2)O → p(2×1)O phase transition is observed. We demonstrate that the reaction rate is the crucial factor determining the occurrence of the p(2×1)O phase and vanishing of the with decrease of temperature. The results indicate that the reaction proceeds inside both the p(2×2)O and phases, but on the perimeter of the domains of p(2×1)O structure. [Copyright &y& Elsevier]

Abstract: The structural, electrical and magnetic properties of ultra-thin La0.83Sr0.17MnO3 (LSMO) films, deposited on NdGaO3 substrate by using the MOCVD technique, were studied. The film thickness d varied in the range from 4 to 140 nm. X-ray and RHEED measurements demonstrated that the films had a two-phase structure. One phase had an orthorhombic face centred structure (a =0.406 nm and c =0.46 nm), while the other one had a cubic perovskite-like structure with a =0.388 nm. Low field dc resistance and magnetization vs. temperature dependences were investigated in the temperature range from 5 to 300 K using a conventional four-probe method and a SQUID magnetometer. It was found that the temperature of the resistivity maximum, T m, increases with increasing film thickness and that the value of the Curie temperature T C estimated from the temperature dependence of magnetization is very close to T m. Modelling of the remanent magnetization vs. temperature dependence based on a two-phase model was in agreement with experimental results. This model also explains the T m shift to lower temperatures with decreasing film thickness. [Copyright &y& Elsevier]

Abstract: Using the interaction parameters up to the third neighbors and activated form of O and CO diffusion and their reaction, the model has been proposed for Monte-Carlo simulations describing the catalytic O+CO→CO2 reaction and occurring phase transitions on Pd(111) surface. Upon adsorption of CO the pre-adsorbed oxygen transforms from p(2×2)O phase into and phases in the limit of room and moderate temperatures, respectively. We demonstrate that the kinetic effects determine both the occurrence of the p(2×1)O and disappearance of the phases at moderate and low temperatures, respectively. Using reaction rate as a fit parameter, we show that at room temperature the start of the reaction can be synchronized with the occurrence of phase. [Copyright &y& Elsevier]

Biophysical methods have emerged as attractive screening techniques in drug discovery both as primary hit finding methodologies, as in the case of weakly active compounds such as fragments, and as orthogonal methods for hit validation for compounds discovered through conventional biochemical or cellular assays. Here we describe a dual method employing fluorescent thermal shift assay (FTSA), also known as differential scanning fluorimetry (DSF) and surface plasmon resonance (SPR), to interrogate ligands of the kinase p38α as well as several known pan-assay interference compounds (PAINs) such as aggregators, redox cyclers, and fluorescence quenchers. This combinatorial approach allows for independent verification of several biophysical parameters such as K D , k on , k off , Δ G , Δ S , and Δ H , which may further guide chemical development of a ligand series. Affinity values obtained from FTSA curves allow for insight into compound binding compared with reporting shifts in melting temperature. Ligand–p38 interaction data were in good agreement with previous literature. Aggregators and fluorescence quenchers appeared to reduce fluorescence signal in the FTSAs, causing artificially high shifts in T m values, whereas redox compounds caused either shifts in affinity that did not agree between FTSA and SPR or a depression of FTSA signal. [ABSTRACT FROM AUTHOR]

The time law of small vibrations of the center of pressure (COP) of humans in standing position (human posture) may provide useful information about health condition of an individual. Very popular method to analyze the posture stability is to draw planar or two single-dimension histograms of COP. In this paper both types of histograms are used as a discriminative tool to distinguish two classes of subjects - healthy ones and those who suffer from multiple sclerosis disability. The pattern recognition method based on solving linear programming problem is presented in this paper. The method was applied for classification of histograms. Numerical experiments demonstrate that planar histograms may be used as a discriminative tool to classify subjects into two classes - healthy and suffering from multiple sclerosis disability. A set of two single-dimension histograms failed to indicate that ability. [ABSTRACT FROM AUTHOR]