Transfer of momentum and torque from a light beam to a liquid

Refraction or absorption of light results in the force and torque, i.e., transfer of momentum and angular momentum from light to the medium. In transversely inhomogeneous beams, the force per unit volume f may have curlf not equal 0 leading to flow or to nonthermal and nongravitational convection in liquids. The force and the torque in scattering systems are as strong as in absorbing materials and may allow one to carry out experiments avoiding thermal effects. Nonlinear optical response of liquid crystals due to this convection is discussed

The generality of inflation in some closed FRW models with a scalar field

The generality of inflation in closed FRW Universe is studied for the models with a scalar field on a brane and with a complex scalar field. The results obtained are compared with the previously known results for the model with a scalar field and a perfect fluid. The influence of the measure chosen in the initial condition space on the ratio of inflationary solution is described.Comment: 15 pages with 5 eps figures; small corrections in text; final version to appear in Int. J. Mod. Phys.

The+basic+algorithm+for+the+design+and+construction+of+a+monocultural+innovation+organization

Algorithmization of management activities in the transition to the digital economy is one of the most important tasks of modern management science. Sketch design is defined by the algorithm creation tool. This algorithmization method is applied to the processes of choosing the type of a homogeneous product, its quality and other consumer properties, utility for the consumer and manufacturer. Products are classified according to their purpose and the resources for their production. The quality of the product is defined as the ratio of the actual properties of the product to the normative ones, while it is necessary to take into account the influence of manufacturing defects, which entails a transition from linear to non-linear quality functions. The cumulative assessment of the product for the consumer is determined taking into account his subjective assessment of the properties of the product, expressed in the weight of the quality of individual utilities. For a manufacturer, the aggregate assessment of product quality directly depends on the main properties of the product, taking into account its other properties, and inversely depends on the cost of purchasing it, taking into account their functional elasticity. The algorithm is recommended for use by specialists dealing with algorithmic management activities

The course of secondary syphilis in hiv positive pregnant women

The article presents data on the epidemiological situation regarding the incidence of syphilis in pregnant women and congenital syphilis. An overview of domestic and foreign sources and clinical case of secondary syphilis in HIV-infected pregnant woman are presented.В статье представлена эпидемиологическая ситуация по заболеваемости врождённым сифилисом и сифилисом беременных. Приведен обзор отечественных и зарубежных источников. Представлен клинический случай вторичного сифилиса у ВИЧ-инфицированной беременной

A Study of Embryotoxic, Foetotoxic, and Teratogenic Effects of the Original Antituberculosis Agent Thiozonide in Pregnant Rabbits

Several treatment regimens with antituberculosis medicinal products are available for tuberculosis. Thiozonide is a newly developed original antimicrobial agent that exhibits bacteriostatic activity against Mycobacterium tuberculosis strains H37Rv, CN-37, CN-40, and MS-115.The aim of the study was to investigate the embryotoxic, foetotoxic, and teratogenic effects of thiozonide in pregnant rabbits.Materials and methods. The study involved 66 pregnant rabbits (4 groups of 16–17 animals each). The rabbits received oral thiozonide from day 6 to day 19 of gestation at doses of 20.6 mg/kg (1 TD (therapeutic dose)), 103 mg/kg (5 TDs), and 206 mg/kg (10 TDs). The control group received a 1% starch solution. The authors conducted a macroscopic examination of the reproductive organs and a histological evaluation of the placenta in eutha nised pregnant rabbits. Live foetuses underwent a check for developmental abnormalities, a skeletal development evaluation with a modified Dawson’s method, and a histologic examination of the internal organs.Results. The study showed no clinical signs of toxicity and no mortality associated with thiozonide in pregnant rabbits across all dose groups. Macroscopic and histological examinations revealed no pathological changes in the reproductive organs of pregnant rabbits. The evaluation of embryotoxic and foetotoxic effects did not identify any differences between the foetuses of the animals assigned to different doses of thiozonide and the control group. The authors found no developmental abnormalities in the foetuses. Examinations of foetal skeleton development and internal organ condition identified no differences between the groups and no abnormalities. The authors registered the death of all foetuses (late resorption) in one rabbit from the 206 mg/kg group. Therefore, the 103 mg/kg dose (5 TDs) was selected as a reasonable No Observed Adverse Effect Level (NOAEL).Conclusions. Thiozonide has no embryotoxic, foetotoxic, or teratogenic effects

Anisotropy and inflation in Bianchi I brane worlds

After a more general assumption on the influence of the bulk on the brane, we extend some conclusions by Maartens et al. and Santos et al. on the asymptotic behavior of Bianchi I brane worlds. As a consequence of the nonlocal anisotropic stresses induced by the bulk, in most of our models, the brane does not isotropize and the nonlocal energy does not vanish in the limit in which the mean radius goes to infinity. We have also found the intriguing possibility that the inflation due to the cosmological constant might be prevented by the interaction with the bulk. We show that the problem for the mean radius can be completely solved in our models, which include as particular cases those in the references above.Comment: 10 pages, improved discussion on the likeliness of non-isotropization, completed list of references, matches version to appear in Class. Quantum Gra

Studies of the spectral and angular distributions of transition radiation using a silicon pixel sensor on a Timepix3 chip

The studies presented in this paper also show that simultaneous measurements of both the energy and the emission angles of the TR X-rays could be used to enhance the particle identification performances of TRD

Fine structure of angular distribution of x-ray transition radiation from multilayered radiator in Geant4

The present version of the Transition Radiation (TR) simulation module implemented in the Geant4 toolkit describes very well experimental data for the TR energy distribution; however. It does not allow reproducing the details of angular distribution at small angles. In order to solve this problem, corrections to the existing x-ray TR module in Geant4 are proposed. With these corrections, the results of the simulations are in a good agreement with the angular TR distributions predicted by theory and obtained in the test beam measurements using a 480 um Si pixel detector and Mylar radiato

Hyporesponse to statin therapy among patients with acute coronary syndrome: prevalence, impact on the development of heart failure in a short-term follow-up

Aim. To study the prevalence of hyporesponse to statin therapy and its impact on the development of heart failure (HF) among patients after acute coronary syndrome (ACS) in a short-term follow-up.Material and methods. This retrospective analysis of outpatient medical records of 400 patients observed at the Omsk Clinical Cardiology Dispensary after ACS was carried out. Optimal medication therapy was prescribed as part of the preferential provision of medicines under the 1H Program, including high-dose atorvastatin therapy (80 mg/day). Low-density lipoprotein cholesterol (LDL-C) was assessed at baseline and 1 and 12 months after therapy. Hyporesponse to statins was defined as the percentage reduction in LDL-C 14; left atrial volume index >34 ml/m2) function.Results. There were 107 patients with hyporesponse (26,8%). Depending on the initial response to therapy, patients were divided into two groups: group 1 (hyporesponse, n=107), group 2 (more pronounced response, n=293). After 1 month, patients in the hyporesponse group had a higher level of LDL-C — 2,4 [2,2; 2,9] mmol/l (Me [25; 75%]) vs 2,0 [1,7; 2,5] mmol/l (p>0,05) in the second group. There was no difference in the prevalence of hospitalizations for recurrent ACS in the compared groups, as well as in the prevalence of new HF cases between groups.Conclusion. The prevalence of hyporesponse to statin therapy was 26,8%, which required correction of lipid-lowering therapy in order to prevent recurrent cardiovascular events. Given the pleiotropic effects of statins that can participate in HF pathogenesis, as well as the inconsistency of current research results, further prospective long-term studies are required

Brane-world Cosmologies with non-local bulk effects

It is very common to ignore the non-local bulk effects in the study of brane-world cosmologies using the brane-world approach. However, we shall illustrate through the use of three different scenarios, that the non-local bulk-effect ${\cal P}_{\mu\nu}$ does indeed have significant impact on both the initial and future behaviour of brane-world cosmologies.Comment: 17 pages, no figures, iopart.cls, submitted to CQ