[Possibilities for predicting infectious and inflammatory complications in patients with urinological disease in the postoperative period].

Unlabelled: The purpose of our work was to assess the possibility of predicting the risks of postoperative complications in patients with urolithiasis in a urological hospital.

Materials And Methods: We performed a retrospective comparative study. We analyzed the medical records of patients in the department of urology of hospital clinics of Siberian State Medical University from November 2022 to May 2023.

Implantable graded-index fibers for neural-dynamics-resolving brain imaging in awake mice on an air-lifted platform.

We demonstrate a versatile framework for cellular brain imaging in awake mice based on suitably tailored segments of graded-index (GRIN) fiber. Closed-form solutions to ray-path equations for graded-index waveguides are shown to offer important insights into image-transmission properties of GRIN fibers, suggesting useful recipes for optimized GRIN-fiber-based deep-brain imaging. We show that the lengths of GRIN imaging components intended for deep-brain studies in freely moving rodents need to be chosen as a tradeoff among the spatial resolution, the targeted imaging depth and the degree of fiber-probe invasiveness.

Computational technique for field-of-view expansion in AOTF-based imagers.

A rather narrow field of view (FOV) has always been considered as an essential limitation of spectral imagers based on acousto-optical tunable filters (AOTFs). We demonstrate a computational technique to overcome this constraint. It is based on preliminary precise spectral-angular characterization of beam transformation caused by light diffraction on an acoustic wave and consequent correction of acquired stack of spectral images.

Spectral Imaging Experiments with Various Optical Schemes Based on the Same AOTF.

Spectral image filtration by means of acousto-optical tunable filters (AOTFs) has multiple applications. For its implementation, a few different optical schemes are in use. They differ in image quality, number of coupling components, dimensions and alignment complexity.

Polarizer-Free AOTF-Based SWIR Hyperspectral Imaging for Biomedical Applications.

Optical biomedical imaging in short wave infrared (SWIR) range within 0.9-1.7 μm is a rapidly developing technique.

High-energy self-mode-locked Cr:forsterite laser near the soliton blowup threshold.

At the level of peak powers needed for a Kerr-lens mode-locked operation of solid-state soliton short-pulse lasers, a periodic perturbation induced by spatially localized pulse amplification in a laser cavity can induce soliton instability with respect to resonant dispersive-wave radiation, eventually leading to soliton blowup and pulse splitting of the laser output. Here, we present an experimental study of a high-peak-power self-mode-locking Cr:forsterite laser, showing that, despite its complex, explosion-like buildup dynamics, this soliton blowup can be captured and quantitatively characterized via an accurate cavity-dispersion- and gain-resolved analysis of the laser output. We demonstrate that, with a suitable cavity design and finely tailored balance of gain, dispersion, and nonlinearity, such a laser can be operated in a subcritical mode, right beneath the soliton blowup threshold, providing an efficient source of sub-100-fs 15-20 MHz repetition-rate pulses with energies as high as 33 nJ.

Statistical theory of critical phenomena in fluids.

We show that there are two classes of the closure equations for the Ornstein-Zernike equation: The analytical equations for the bridge functional B=B;{(an)} like hypernetted-chain approximation, Percus-Yevick approximation, etc., and nonanalytic equation B=B;{(nan)} , where B;{(nan)}=B;{(rg)}+B;{(cr)} and B;{(rg)} is the regular (analytical) component of the bridge functional, and B;{(cr)} is the critical (nonanalytical) component of B;{(nan)} . The closure equation B;{(an)} defines coordinates of the critical point and other individual features of critical phenomena, and B;{(nan)} defines all the known relations between critical exponents.

The Ornstein-Zernike equation and critical phenomena in fluids.

It is shown that there are two classes of closure equations for the Ornstein-Zernike (OZ) equation: the analytical equations B=B((an)) type of hyper-netted-chain approximation, Percus-Yevick approximation etc., and the nonanalytical equation B=B((non)), where B((nan))=B((RG))+B((cr)); B((RG)) is the regular (analytical) component of the bridge functional, and B((cr)) is the critical (nonanalytical) component of B((nan)). The closure equation B((an)) defines coordinates of a critical point and other individual features of critical phenomena, and B((nan)) defines known relations between critical exponents.

Regarding the theory of the Zeno line.

The line of thermodynamic states with a unit value of the compressibility factor was calculated for a Lennard-Jones system using four different approaches. We show that all four approaches give rise to a straight line on the density-temperature plane. Thus, we theoretically confirm that the Lennard-Jones system satisfies Zeno line regularity.

[Significance of indicator microorganisms in the assessment of a microbial risk in the occurrence of epidemic hazard in drinking water use].

Summary. The paper provides comparative characteristics of water quality in the assessment of a risk for intestinal infections in drinking water use. It has shown that of the greatest predictive value is direct detection of potentially pathogenic microorganisms, as well as the integral indicator determined by glucose fermentation, such as glucose-positive coliform bacteria.

Regarding convergence curve of virial expansion for the Lennard-Jones system.

We calculate the convergence curve of the virial expansion for a Lennard-Jones system in the density-temperature plane using the approximate method based on the density expansion of the Ornstein-Zernike equation and the condition of thermodynamic consistency [J. Chem. Phys.

Corridor of existence of thermodynamically consistent solution of the Ornstein-Zernike equation.

We obtain the exact equation for a correction to the Ornstein-Zernike (OZ) equation based on the assumption of the uniqueness of thermodynamical functions. We show that this equation is reduced to a differential equation with one arbitrary parameter for the hard sphere model. The compressibility factor within narrow limits of this parameter variation can either coincide with one of the formulas obtained on the basis of analytical solutions of the OZ equation or assume all intermediate values lying in a corridor between these solutions.

Triangle of liquid-gas states.

We demonstrate for the first time that (a) the straight line of the unit compressibility factor (Zeno line) tends asymptotically to the liquid branch of binodal at low temperatures, (b) the straight line with a half density has to be close to the average of vapor-liquid densities along the binodal curve (rectilinear diameter), and (c) the phase coexistence curves are inscribed into the right triangle in the density-temperature plane, which is formed by the Zeno line and by the segments which this line cuts off on the axes. These statements are confirmed for model systems and for a wide group of real substances (for the first time including metals: Hg, Cs, and Cu). Critical parameters of all substances under study are located in the vicinity of the triangle median, drawn to the density axis, with a dispersion on the order of 2 in reduced units.

[Effect of sanitary and hygienic conditions of populated placed on the incidence of intestinal diseases].

Data on the relationship between the incidence of intestinal infections, including hepatitis A, and communal conditions of settlements and quality of drinking water are presented.